Patent application number | Description | Published |
20080230871 | SEMICONDUCTOR DISPLAY DEVICE AND METHOD OF MANUFACTURING THE SAME - A semiconductor display device with an interlayer insulating film in which surface levelness is ensured with a limited film formation time, heat treatment for removing moisture does not take long, and moisture in the interlayer insulating film is prevented from escaping into a film or electrode adjacent to the interlayer insulating film. A TFT is formed and then a nitrogen-containing inorganic insulating film that transmits less moisture compared to organic resin film is formed so as to cover the TFT. Next, organic resin including photosensitive acrylic resin is applied and an opening is formed by partially exposing the organic resin film to light. The organic resin film where the opening is formed, is then covered with a nitrogen-containing inorganic insulating film which transmits less moisture than organic resin film does. Thereafter, the gate insulating film and the two layers of the nitrogen-containing inorganic insulating films are partially etched away in the opening of the organic resin film to expose the active layer of the TFT. | 09-25-2008 |
20080238471 | ELECTRICAL INSPECTION METHOD AND METHOD OF FABRICATING SEMICONDUCTOR DISPLAY DEVICES - A method of electrically inspecting semiconductors display device, which is capable of inspecting whether a signal is normally input to the pixels and whether an electric charge is normally held by the holding capacitors without using the video signal line as a passage for reading the electric charge and without separately providing an inspection-dedicated circuit. | 10-02-2008 |
20080315205 | Display device and manufacturing method thereof - It is an object of the present invention to prevent an influence of voltage drop due to wiring resistance, trouble in writing of a signal into a pixel and trouble in gray scales, and provide a display device with higher definition, represented by an EL display device and a liquid crystal display device. | 12-25-2008 |
20090033600 | Light Emitting Device and Method of Driving the Light Emitting Device - A light emitting device that achieves long life, and which is capable of performing high duty drive, by suppressing initial light emitting element deterioration is provided. Reverse bias application to an EL element ( | 02-05-2009 |
20090051630 | Light Emitting Device - The invention has a monitoring portion which detects change of ambient temperature and degradation with time, provided with a plurality of monitoring pixels and a monitoring line. Each of the plurality of monitoring pixels has a light emitting element for monitoring, a constant current source, a switch, and a detecting circuit, and one electrode of the light emitting element for monitoring is connected to the monitoring line through the switch. The detecting circuit controls on and off of the switch, and specifically in the case where both electrodes of the light emitting element for monitoring are short-circuited, the switch is turned off. The invention having the aforementioned configuration generates no potential change of the power supply line of the pixel portion when both electrodes of a light emitting element for monitoring are short-circuited. | 02-26-2009 |
20090072757 | METHOD OF DRIVING A LIGHT EMITTING DEVICE - The present invention is characterized in that a transistor with its L/W set to 10 or larger is employed, and that |V | 03-19-2009 |
20090174333 | Display Device and Electronic Device - A display device where the influence of variations in current of the light emitting element due to changes in ambient temperature and changes with time can be suppressed. The display device of the invention has a light emitting element, a driving transistor connected in series to the light emitting element, a monitoring light emitting element, a limiter transistor connected in series to the monitoring light emitting element, a constant current source for supplying a constant current to the monitoring light emitting element, and a circuit for outputting a potential equal to an inputted potential. A first electrode of the light emitting element is connected to an output terminal of the circuit through the driving transistor, and a first electrode of the monitoring light emitting element is connected to an input terminal of the circuit through the limiter transistor. The channel length L | 07-09-2009 |
20090179549 | ELECTRONIC DISPLAY INCLUDING A LIGHT-EMITTING ELEMENT AND A COLOR FILTER SANDWICHED BETWEEN TWO POLARIZERS - It is an object of the invention to achieve weight saving and downsizing of an electronic apparatus, in particular a portable electronic apparatus while enlarging a display screen thereof. The invention provides an electronic apparatus using a light emitting device which includes a light emitting element, a color filter provided on either side of an anode or a cathode of the light emitting element, and two polarizers sandwiching the light emitting element and the color filter, in which the anode and the cathode transmit light, deflection angles of the two polarizers are different from each other, and light obtained from the light emitting element is white. | 07-16-2009 |
20090201077 | CLOCKED INVERTER, NAND, NOR AND SHIFT REGISTER - A threshold voltage of a transistor is fluctuated because of fluctuation in film thickness of a gate insulating film or in gate length and gate width caused by differences of used substrates or manufacturing steps. In order to solve the problem, according to the present invention, there is provided a clocked inverter including a first transistor and a second transistor connected in series, and a compensation circuit including a third transistor and a fourth transistor connected in series. In the clocked inverter, gates of the third transistor and the fourth transistor are connected to each other, drains of the third transistor and the fourth transistor are each connected to a gate of the first transistor, sources of the first transistor and the fourth transistor are each electrically connected to a first power source, a source of the second transistor is electrically connected to a second power source, and an amplitude of a signal inputted to a source of the third transistor is smaller than a potential difference between the first power source and the second power source. | 08-13-2009 |
20090213045 | Display device and driving method thereof - It is provided a display device that prevents, when applying a reverse bias, an anode line and a power supply line included in a signal line driver circuit from being short-circuited, and a driving method thereof. According to the invention, a reverse bias applying circuit is provided in a scan line driver circuit or a signal line driver circuit, a signal from the reverse bias applying circuit is supplied to a transistor disposed between a signal line and an anode line, and thereby the transistor is turned off. The reverse bias applying circuit comprises an analog switch or a clocked inverter and a biasing transistor, and drives so as to invert potentials of the anode line and a cathode line and apply a reverse bias to a light emitting element, while turn off the analog switch and turn on the biasing transistor. Then, a potential of the anode line becomes equal to that of a scan line, and thereby turning off the transistor between the anode line and the signal line assuredly. | 08-27-2009 |
20090237390 | DISPLAY DEVICE - A light emitting element has a property in which a current value is varied due to a change in temperature. A display device has a temperature compensation function in order to suppress the variation in current value dues to the change in temperature. The temperature compensation function, which is essential for the present invention has a sensor, a storage means, and a correction means. The sensor has a function of detecting an environmental temperature. The detected temperature is compared with data of voltage-current characteristic versus temperature in the light emitting element which is stored in advance in the storage means. In the correction means, a signal inputted to a pixel or a power source potential supplied to a pixel portion is corrected using an output of the sensor and the data stored in the storage means. | 09-24-2009 |
20090257283 | METHOD FOR DELETING DATA FROM NAND TYPE NONVOLATILE MEMORY - To provide a method of releasing charges which have been injected into charge accumulating layers of nonvolatile memory elements without using a substrate terminal such as a p well or an n well, as a method for deleting data from a NAND-type nonvolatile memory. In the method for deleting data from the NAND-type nonvolatile memory, charges stored in a charge accumulating layer of a first nonvolatile memory element are released by applying a first potential to a bit line and a source line, a second potential to a control gate of the first nonvolatile memory element, and a third potential which is different from the second potential to a control gate of a second nonvolatile memory element. | 10-15-2009 |
20090283775 | SEMICONDUCTOR DEVICE - Semiconductor elements deteriorate or are destroyed due to electrostatic discharge damage. The present invention provides a semiconductor device in which a protecting means is formed in each pixel. The protecting means is provided with one or a plurality of elements selected from the group consisting of resistor elements, capacitor elements, and rectifying elements. Sudden changes in the electric potential of a source electrode or a drain electrode of a transistor due to electric charge that builds up in a pixel electrode is relieved by disposing the protecting means between the pixel electrode of the light-emitting element and the source electrode or the drain electrode of the transistor. Deterioration or destruction of the semiconductor element due to electrostatic discharge damage is thus prevented. | 11-19-2009 |
20090291536 | SEMICONDUCTOR DEVICE AND MANUFACTURING METHOD THEREOF - It is an object of the present invention to form a plurality of elements in a limited area to reduce the area occupied by the elements for integration so that further higher resolution (increase in number of pixels), reduction of each display pixel pitch with miniaturization, and integration of a driver circuit that drives a pixel portion can be advanced in semiconductor devices such as liquid crystal display devices and light-emitting devices that has EL elements. A photomask or a reticle provided with an assist pattern that is composed of a diffraction grating pattern or a semi-transparent film and has a function of reducing a light intensity is applied to a photolithography process for forming a gate electrode to form a complicated gate electrode. In addition, a top-gate TFT that has the multi-gate structure described above and a top gate TFT that has a single-gate structure can be formed on the same substrate just by changing the mask without increasing the number of processes. | 11-26-2009 |
20090315032 | DISPLAY DEVICE - A display device according to the present invention includes: a planarization layer for insulating between a gate electrode etc. and a data wiring, a drain electrode, or the like of the transistor; and a barrier layer that is formed on an upper surface or lower surface of the planarization layer and at the same time, adapted to suppress diffusion of moisture or degassing components from the planarization layer. The display device adopts a device structure effective in reducing the plasma damage on the planarization layer by devising a positional relationship between the planarization layer and the barrier layer. Also, in combination with a novel structure as a structure for a pixel electrode, effects such as an increase in luminance can be provided as well. | 12-24-2009 |
20100001931 | DISPLAY DEVICE AND ELECTRONIC DEVICE USING THE SAME - A display device with a compensation circuit that applies a fixed potential constantly to a gate electrode of a driving transistor for a certain period is provided. Specifically, each difference voltage value between an anode and a cathode of the light emitting element is utilized in the case where the light emitting element emits light and emits no light. In a case where the light emitting element emits light, a potential of the gate electrode of the driving transistor is to be held; and in a case where the light emitting element emits no light, a potential that certainly turns off the gate electrode of the driving transistor is kept on applying to the gate electrode of the driving transistor. | 01-07-2010 |
20100034338 | SHIFT REGISTER AND SEMICONDUCTOR DISPLAY DEVICE - The invention provides a shift register which can operate normally while suppressing a delay of signal and a rounding of waveform. The shift register of the invention includes a plurality of stages of flip-flop circuits each of which includes a clocked inverter. The clocked inverter includes a first transistor and a second transistor which are connected in series, a first compensation circuit including a third transistor and a fourth transistor which are connected in series, and a second compensation circuit including a fifth transistor and a transmission gate. According to the first compensation circuit, a timing at which a signal outputted from the flip-flop circuit rises or falls can be controlled in synchronization with an output of two stages before. The second compensation circuit can control a clock signal input can be controlled. | 02-11-2010 |
20100066653 | DISPLAY DEVICE AND ELECTRONIC DEVICE - It is an object of the present invention to provide a display device in which images can be seen under a dark place to intense external light. In the display device, display is performed by changing the gray scale number depending on external light intensity, and display modes can be switched depending on contents displayed on the screen. An analog mode and a digital mode are switched depending on external light intensity. In an analog digital switching circuit, when a video signal is an analog value, a signal is outputted to a pixel array without any change and, when the video signal is a digital value, the signal is outputted to a circuit that performs a digital operation such as a latch circuit. Consequently, display gray scales of a pixel are changed appropriately. Accordingly, a clear image can be displayed. For example, it is possible to ensure visibility in a wide range of a dark place or under indoor florescent light to outdoor sun light. | 03-18-2010 |
20100073269 | DISPLAY DEVICE AND ELECTRONIC DEVICE - A display device capable of displaying a picture of vivid colors maintaining a good balance of colors and a good balance of light-emitting brightnesses of the EL elements. The widths of the detour wirings supplying current to the power source feed lines are increased for those EL elements into which a current of a large density flows. This constitution decreases the wiring resistances of the detour wirings, decreases the potential drop through the detour wirings, and suppresses the amount of electric power consumed by the detour wirings. | 03-25-2010 |
20100133601 | SEMICONDUCTOR DEVICE - A semiconductor device is provided, which comprises at least a cell including a plurality of memory elements connected in series. Each of the plurality of memory elements includes a channel formation region, a source and drain regions, a floating gate, and a control gate. Each of the source and drain regions is electrically connected to an erasing line through a semiconductor impurity region. | 06-03-2010 |
20100183114 | Shift Register and Driving Method Thereof - A low power consumption shift register which inputs a CK signal with a low voltage with almost no effect of variation in characteristics of transistors. In the invention, an input portion of an inverter is set at a threshold voltage thereof and a CK signal is inputted to the input portion of the inverter through a capacitor means. In this mariner, the CK signal is amplified, which is sent to the shift register. That is, by obtaining the threshold potential of the inverter, the shift register which operates with almost no effect of variation in characteristics of transistors can be provided. A level shifter of the CK signal is generated from an output pulse of the shift register, therefore, the low power consumption shift register having the level shifter which flows a shoot-through current for a short period can be provided | 07-22-2010 |
20100276695 | DISPLAY DEVICE AND MANUFACTURING METHOD THEREOF - It is an object of the present invention to prevent an influence of voltage drop due to wiring resistance, trouble in writing of a signal into a pixel, and trouble in gray scales, and provide a display device with higher definition, represented by an EL display device and a liquid crystal display device. | 11-04-2010 |
20100289840 | Light Emitting Device and Driving Method Thereof - A light emitting device which is able to suppress power consumption while a balance of white light is maintained is provided. According to the present invention, either the potential level of the Hi video signal or Lo video signal which is given to a gate electrode of a transistor, and the potential level of the power source lines are changed by the respective corresponding colors. Concretely, the potential level at the side of Lo and the potential level of the power source line are made to be changed by the respective corresponding colors when a transistor which controls current supplied to a light emitting element is a p-channel type. Conversely, the potential level at the side so of the Hi and potential level of the power source line are made to be changed by the respective corresponding colors when a transistor which controls current supplied to a light emitting element is an n-channel type. | 11-18-2010 |
20110012939 | Display Device and Driving Method Thereof - [Problem] In the case where variations of environmental temperature or variations with time occur depending on characteristics of a light-emitting element, variations are generated in luminance. In the invention, a display device for suppressing effects due to variations of a current value of a light-emitting element, which is caused by variations of environmental temperature and variations with time. | 01-20-2011 |
20110043513 | DEVICE SUBSTRATE, LIGHT EMITTING DEVICE AND DRIVING METHOD OF LIGHT EMITTING DEVICE - A light emitting device comprising a light emitting element and a first transistor and a second transistor controlling current to be supplied to the light emitting element in a pixel; the first transistor is normally-on; the second transistor is normally-off; a channel length of the first transistor is longer than a channel width thereof; a channel length of the second transistor is equal to or shorter than a channel length thereof; gate electrodes of the first transistor and the second transistor are connected to each other; the first transistor and the second transistor have the same polarity; and the light emitting element, the first transistor and the second transistor are all connected in series. | 02-24-2011 |
20110049522 | SEMICONDUCTOR DISPLAY DEVICE - It is an object of the present invention to provide a semiconductor display device having an interlayer insulating film which can obtain planarity of a surface while controlling film formation time, can control treatment time of heating treatment with an object of removing moisture, and can prevent moisture in the interlayer insulating film from being discharged to a film or an electrode adjacent to the interlayer insulating film. An inorganic insulating film containing nitrogen, which is less likely to transmit moisture compared with an organic resin, is formed so as to cover a TFT. Next, an organic resin film containing photosensitive acrylic resin is applied to the organic insulting film, and the organic resin film is partially exposed to light to be opened. Thereafter, an inorganic insulting film containing nitrogen, which is less likely to transmit moisture compared with an organic resin, is formed so as to cover the opened organic resin film. Then, in the opening part of the organic resin film, a gate insulating film and the two layer inorganic insulating film containing nitrogen are opened partially is by etching to expose an active layer of the TFT. | 03-03-2011 |
20110068824 | SHIFT REGISTER AND SEMICONDUCTOR DISPLAY DEVICE - The invention provides a shift register which can operate normally while suppressing a delay of signal and a rounding of waveform. The shift register of the invention includes a plurality of stages of flip-flop circuits each of which includes a clocked inverter. The clocked inverter includes a first transistor and a second transistor which are connected in series, a first compensation circuit including a third transistor and a fourth transistor which are connected in series, and a second compensation circuit including a fifth transistor and a transmission gate. According to the first compensation circuit, a timing at which a signal outputted from the flip-flop circuit rises or falls can be controlled in synchronization with an output of two stages before. The second compensation circuit can control a clock signal input can be controlled. | 03-24-2011 |
20110122121 | SEMICONDUCTOR DEVICE - The present invention provides a semiconductor device in which a power line is not affected by noise due to a voltage drop caused by instantaneous high-current consumption in the buffer portion and that has no possibility that a logic portion malfunctions. In a case where the same potential is supplied to a logic portion and a buffer portion, by a method in which separate FPC terminals are used for the logic portion and the buffer portion, or by a method in which the FPC terminal is shared but a power line is branched for the logic portion and the buffer portion at a point close to the FPC terminal, a problem that the logic portion is affected by noise generated by a voltage drop of the power line due to instantaneous high-current consumption in the buffer portion can be prevented. | 05-26-2011 |
20110140134 | DISPLAY DEVICE AND MANUFACTURING METHOD THEREOF - It is an object of the present invention to prevent an influence of voltage drop due to wiring resistance, trouble in writing of a signal into a pixel, and trouble in gray scales, and provide a display device with higher definition, represented by an EL display device and a liquid crystal display device. | 06-16-2011 |
20110148517 | Shift Register and Driving Method Thereof - A low power consumption shift register which inputs a CK signal with a low voltage with almost no effect of variation in characteristics of transistors. In the invention, an input portion of an inverter is set at a threshold voltage thereof and a CK signal is inputted to the input portion, of the inverter through a capacitor means. In this manner, the CK signal is amplified, which is sent to the shift register. That is, by obtaining the threshold potential of the inverter, the shift register which operates with almost no effect of variation in characteristics of transistors can be provided. A level shifter of the CK signal is generated from an output pulse of the shift register, therefore, the low power consumption shift register having the level shifter which flows a shoot-through current for a short period can be provided | 06-23-2011 |
20110163793 | SEMICONDUCTOR DEVICE AND ELECTRONIC APPLIANCE USING THE SAME - A semiconductor device with less power consumption and an electronic appliance using the same. The semiconductor device of the invention is supplied with a first potential from a high potential power source and a second potential from a low potential power source. Upon input of a first signal to an input node, an output node outputs a second signal. With the semiconductor device of the invention, a potential difference of the second signal can be controlled to be smaller than a potential difference between the first potential and the second potential, thereby power consumption required for charging/discharging wires can be reduced. | 07-07-2011 |
20110169548 | DATA LATCH CIRCUIT, DRIVING METHOD OF THE DATA LATCH CIRCUIT, AND DISPLAY DEVICE - The present invention provides a data latch circuit which can operate stably with a low-amplitude signal, which consumes less electric power, and which is resistant against the variation in TFTs. | 07-14-2011 |
20110181189 | LIGHT EMITTING DEVICE AND DRIVING METHOD THEREOF - The light emitting device has a limiter transistor which is connected to a monitoring element, and an inverter an output terminal of which is connected to a gate electrode of the limiter transistor and an input terminal of which is connected to one electrode of the limiter transistor and the monitoring element. In the case where the monitoring element is short-circuited, the limiter transistor can be turned off by the inverter to correct a defect of the monitoring element. | 07-28-2011 |
20110181786 | DISPLAY DEVICE AND ELECTRONIC APPARATUS - To provide a display device whose display can be recognized even in dark places or under the strong outside light. The display device performs display by controlling the number of gray scales in accordance with the intensity of outside light, which means a display mode can be switched in accordance with the data to be displayed on the display screen. A video signal generation circuit is controlled in each display mode in such a manner that it directly outputs an input video signal with an analog value, outputs a signal with a binary digital value, or outputs a signal with a multivalued digital value. As a result, gray scales displayed in pixels are timely changed. Accordingly, clear images can be displayed while maintaining high visibility in various environments, in the wide range from, for example, dark places or indoors (e.g., under a fluorescent lighting) to outdoors (e.g., under the sunlight). | 07-28-2011 |
20110187762 | SEMICONDUCTOR DEVICE, DISPLAY DEVICE AND ELECTRONIC APPARATUS - A semiconductor device of the invention includes a data line, a power source line, a first scan line, a second scan line, a first transistor, a second transistor, a memory circuit, a third transistor, and a light-emitting element. A gate of the first transistor is connected to the data line, and a first terminal thereof is connected to the power source line; a gate of the second transistor is connected to the first scan line, and a first terminal thereof is connected to a second terminal of the first transistor; the memory circuit is connected to a second terminal of the second transistor and the second scan line; a first terminal of the third transistor is connected to the light-emitting element; and the memory circuit holds a first potential inputted from the power source line or a second potential inputted from the second scan line, and applies the potential to a gate of the third transistor to control emission/non-emission of the light-emitting element. | 08-04-2011 |
20110220983 | METHOD FOR DELETING DATA FROM NAND TYPE NONVOLATILE MEMORY - To provide a method of releasing charges which have been injected into charge accumulating layers of nonvolatile memory elements without using a substrate terminal such as a p well or an n well, as a method for deleting data from a NAND-type nonvolatile memory. In the method for deleting data from the NAND-type nonvolatile memory, charges stored in a charge accumulating layer of a first nonvolatile memory element are released by applying a first potential to a bit line and a source line, a second potential to a control gate of the first nonvolatile memory element, and a third potential which is different from the second potential to a control gate of a second nonvolatile memory element. | 09-15-2011 |
20110241008 | SEMICONDUCTOR DISPLAY DEVICE AND METHOD OF MANUFACTURING THE SAME - A semiconductor display device with an interlayer insulating film in which surface levelness is ensured with a limited film formation time, heat treatment for removing moisture does not take long, and moisture in the interlayer insulating film is prevented from escaping into a film or electrode adjacent to the interlayer insulating film. A TFT is formed and then a nitrogen-containing inorganic insulating film that transmits less moisture compared to organic resin film is formed so as to cover the TFT. Next, organic resin including photosensitive acrylic resin is applied and an opening is formed by partially exposing the organic resin film to light. The organic resin film where the opening is foamed, is then covered with a nitrogen-containing inorganic insulating film which transmits less moisture than organic resin film does. Thereafter, the gate insulating film and the two layers of the nitrogen-containing inorganic insulating films are partially etched away in the opening of the organic resin film to expose the active layer of the TFT. | 10-06-2011 |
20110272732 | Element Substrate and Light Emitting Device - A light emitting device and an element substrate which are capable of suppressing variations in the luminance intensity of a light emitting element among pixels due to characteristic variations of a driving transistor without suppressing off-current of a switching transistor low and increasing storage capacity of a capacitor. According to the invention, a depletion mode transistor is used as a driving transistor. The gate of the driving transistor is fixed in its potential or connected to the source or drain thereof to operate in a saturation region with a constant current flow. A current controlling transistor which operates in a linear region is connected in series to the driving transistor, and a video signal for transmitting a light emission or non-emission of a pixel is inputted to the gate of the current controlling transistor through a switching transistor. | 11-10-2011 |
20110279441 | Display Device and Driving Method of the Same, and Electronic Apparatus - The brightness of a light emitting element varies when changes in ambient temperature or changes with time occur. In view of this, the invention provides a display device where the influence of variations in the current value of the light emitting element due to changes in ambient temperature and changes with time can be suppressed. The display device of the invention includes a monitoring element that is driven with a constant current, and a voltage applied to the monitoring element is detected and inputted to a light emitting element. In other words, the monitoring element is driven with a low current, and a voltage applied to the monitoring element is inputted to the light emitting element such that the light emitting element is driven with a constant current. | 11-17-2011 |
20110298362 | Display Device - A display device with high-definition, in which display unevenness due to a voltage drop in a wiring or display unevenness due to a variation in characteristics of TFTs are suppressed. The display device of the invention comprises a first wiring for transmitting a video signal and a second wiring for supplying a current to a light emitting element. The first wiring and the second wiring extend parallel to each other, and are formed so as to overlap with each other at least partly with an insulating layer interposed therebetween. | 12-08-2011 |
20110304605 | Data Latch Circuit and Electronic Device - The data latch circuit of the invention includes a means for short-circuiting an input terminal and an output terminal of an inverter and by connecting the input terminal to one electrode of a capacitor and sampling a data signal or a reference potential to the other electrode of the capacitor, an accurate operation can be obtained without being influenced by variations in the TFT characteristics even when the amplitude of an input signal is small relatively to the width of a power supply voltage. | 12-15-2011 |
20110309364 | SEMICONDUCTOR DISPLAY DEVICE - It is an object of the present invention to provide a semiconductor display device having an interlayer insulating film which can obtain planarity of a surface while controlling film formation time, can control treatment time of heating treatment with an object of removing moisture, and can prevent moisture in the interlayer insulating film from being discharged to a film or an electrode adjacent to the interlayer insulating film. An inorganic insulating film containing nitrogen, which is less likely to transmit moisture compared with an organic resin, is formed so as to cover a TFT. Next, an organic resin film containing photosensitive acrylic resin is applied to the organic insulating film, and the organic resin film is partially exposed to light to be opened. Thereafter, an inorganic insulating film containing nitrogen, which is less likely to transmit moisture compared with an organic resin, is formed so as to cover the opened organic resin film. Then, in the opening part of the organic resin film, a gate insulating film and the two layer inorganic insulating film containing nitrogen are opened partially by etching to expose an active layer of the TFT. | 12-22-2011 |
20110309368 | SEMICONDUCTOR DEVICE - Semiconductor elements deteriorate or are destroyed due to electrostatic discharge damage. The present invention provides a semiconductor device in which a protecting means is formed in each pixel. The protecting means is provided with one or a plurality of elements selected from the group consisting of resistor elements, capacitor elements, and rectifying elements. Sudden changes in the electric potential of a source electrode or a drain electrode of a transistor due to electric charge that builds up in a pixel electrode is relieved by disposing the protecting means between the pixel electrode of the light-emitting element and the source electrode or the drain electrode of the transistor. Deterioration or destruction of the semiconductor element due to electrostatic discharge damage is thus prevented. | 12-22-2011 |
20120019300 | SHIFT REGISTER AND SEMICONDUCTOR DISPLAY DEVICE - The invention provides a shift register which can operate normally while suppressing a delay of signal and a rounding of waveform. The shift register of the invention includes a plurality of stages of flip-flop circuits each of which includes a clocked inverter. The clocked inverter includes a first transistor and a second transistor which are connected in series, a first compensation circuit including a third transistor and a fourth transistor which are connected in series, and a second compensation circuit including a fifth transistor and a transmission gate. According to the first compensation circuit, a timing at which a signal outputted from the flip-flop circuit rises or falls can be controlled in synchronization with an output of two stages before. The second compensation circuit can control a clock signal input can be controlled. | 01-26-2012 |
20120032199 | Element Substrate and Light-Emitting Device - A potential of a gate of a driving transistor is fixed, and the driving transistor is operated in a saturation region, so that a current is supplied thereto anytime. A current control transistor operating in a linear region is disposed serially with the driving transistor, and a video signal for transmitting a signal of emission or non-emission of the pixel is input to a gate of the current control transistor via a switching transistor. | 02-09-2012 |
20120056862 | DISPLAY DEVICE AND ELECTRONIC APPARATUS - To provide a display device whose display can be recognized even in dark places or under the strong outside light. The display device performs display by controlling the number of gray scales in accordance with the intensity of outside light, which means a display mode can be switched in accordance with the data to be displayed on the display screen. A video signal generation circuit is controlled in each display mode in such a manner that it directly outputs an input video signal with an analog value, outputs a signal with a binary digital value, or outputs a signal with a multivalued digital value. As a result, gray scales displayed in pixels are timely changed. Accordingly, clear images can be displayed while maintaining high visibility in various environments, in the wide range from, for example, dark places or indoors (e.g., under a fluorescent lighting) to outdoors (e.g., under the sunlight). | 03-08-2012 |
20120086346 | CLOCKED INVERTER, NAND, NOR AND SHIFT REGISTER - In a display device including a substrate, a pixel portion, and a driver circuit having first to ninth transistors and first and second inverters, the various transistors are configured such that one of a source and a drain of the fifth transistor is electrically connected to a gate of the first transistor. In embodiments, the electrical connection may be a direct connection. Additionally, a switch may be provided that is directly connected to an output terminal of the second inverter. | 04-12-2012 |
20120104425 | Method of Driving A Light Emitting Device - The present invention is characterized in that a transistor with its L/W set to 10 or larger is employed, and that |V | 05-03-2012 |
20120133839 | SOURCE LINE DRIVING CIRCUIT, ACTIVE MATRIX TYPE DISPLAY DEVICE AND METHOD FOR DRIVING THE SAME - If the frequency of a clock signal is increased, the pulse width of a sampling pulse is decreased, and the amount of time for a video signal to be written to a source line is inadequate. Sampling pulses (sam) rise sequentially in synchronization with the rise of a start pulse (SP). As the start pulse (SP) rises, synchronized with the rise of clock signals (CK, CKB), the sampling pulses (sam) fall off sequentially, delayed by half the period of the clock signals (CK, CKB) for every step. As a result, the sampling pulses (sam) with a pulse width longer than one period of the clock signals (CK, CKB) are generated. In a period T | 05-31-2012 |
20120162051 | Display Device - A display device with high-definition, in which display unevenness due to a voltage drop in a wiring or display unevenness due to a variation in characteristics of TFTs are suppressed. The display device of the invention comprises a first wiring for transmitting a video signal and a second wiring for supplying a current to a light emitting element. The first wiring and the second wiring extend parallel to each other, and are formed so as to overlap with each other at least partly with an insulating layer interposed therebetween. | 06-28-2012 |
20120205658 | SEMICONDUCTOR DISPLAY DEVICE AND METHOD OF MANUFACTURING THE SAME - A semiconductor display device is formed including an interlayer insulating. Specifically, a TFT is formed and then a nitrogen-containing inorganic insulating film that transmits less moisture compared to organic resin film is formed so as to cover the TFT. Next, organic resin including photosensitive acrylic resin is applied and an opening is formed by partially exposing the organic resin film to light. The organic resin film where the opening is formed, is then covered with a nitrogen-containing inorganic insulating film which transmits less moisture than organic resin film does. Thereafter, the gate insulating film and the two layers of the nitrogen-containing inorganic insulating films are partially etched away in the opening of the organic resin film to expose the active layer of the TFT. | 08-16-2012 |
20120218238 | DISPLAY DEVICE AND DRIVING METHOD THEREOF - A display device includes a current source, a first transistor, a second transistor, and a light-emitting element. One electrode of the light-emitting element is electrically connected to the current source through a source and a drain of the first transistor. The same electrode of the light-emitting element is also electrically connected to a wiring through a source and a drain of the second transistor. | 08-30-2012 |
20120235128 | ELEMENT SUBSTRATE AND LIGHT EMITTING DEVICE - A light emitting device and an element substrate which are capable of suppressing variations in the luminance intensity of a light emitting element among pixels due to characteristic variations of a driving transistor without suppressing off-current of a switching transistor low and increasing storage capacity of a capacitor. According to the invention, a depletion mode transistor is used as a driving transistor. The gate of the driving transistor is fixed in its potential or connected to the source or drain thereof to operate in a saturation region with a constant current flow. A current controlling transistor which operates in a linear region is connected in series to the driving transistor, and a video signal for transmitting a light emission or non-emission of a pixel is inputted to the gate of the current controlling transistor through a switching transistor. | 09-20-2012 |
20120261665 | LIGHT EMITTING DEVICE AND METHOD OF DRIVING THE LIGHT EMITTING DEVICE - A light emitting device that achieves long life, and which is capable of performing high duty drive, by suppressing initial light emitting element deterioration is provided. Reverse bias application to an EL element ( | 10-18-2012 |
20120261667 | DISPLAY DEVICE - A display device according to the present invention includes a barrier layer formed over the transistor and a planarization layer formed over the barrier layer. The planarization layer has an opening and an edge portion of the planarization layer formed at the opening of the planarization layer is rounded. Further, a resin film is formed over the planarization layer and in the opening of the planarization layer, and the resin film also has an opening and an edge portion of the resin film formed at the opening of the resin film is rounded. A light emitting member is formed over the resin film. | 10-18-2012 |
20120262206 | DATA LATCH CIRCUIT AND ELECTRONIC DEVICE - The data latch circuit of the invention includes a means for short-circuiting an input terminal and an output terminal of an inverter and by connecting the input terminal to one electrode of a capacitor and sampling a data signal or a reference potential to the other electrode of the capacitor, an accurate operation can be obtained without being influenced by variations in the TFT characteristics even when the amplitude of an input signal is small relatively to the width of a power supply voltage. | 10-18-2012 |
20120299889 | DEVICE SUBSTRATE, LIGHT EMITTING DEVICE AND DRIVING METHOD OF LIGHT EMITTING DEVICE - A light emitting device comprising a light emitting element and a first transistor and a second transistor controlling current to be supplied to the light emitting element in a pixel; the first transistor is normally-on; the second transistor is normally-off; a channel length of the first transistor is longer than a channel width thereof; a channel length of the second transistor is equal to or shorter than a channel length thereof; gate electrodes of the first transistor and the second transistor are connected to each other; the first transistor and the second transistor have the same polarity; and the light emitting element, the first transistor and the second transistor are all connected in series. | 11-29-2012 |
20130002622 | Method of Driving Light-Emitting Device - Degradations in light emitting elements occur with the passage of time. The invention provides a method of driving a light-emitting device provided with a plurality of pixels, which includes a light-emitting means with a first and a second electrodes, a drive means for supplying the light-emitting means with a current in response to an analog video signal, and a setting means for setting a sustaining period and an off time period within a frame period. The method of driving a light-emitting device is characterized by including the steps of: supplying the light-emitting means with the current in response to the analog video signal during the sustaining period; and turning the drive means off thereby to make the light-emitting means nonluminous or making the first and the second electrodes identical in potential thereby to make the light-emitting means nonluminous during the off time period. | 01-03-2013 |
20130032808 | DISPLAY DEVICE - A display device having a first pixel electrode and a second pixel electrode whose areas are different from each other is provided. In the display device, the first pixel electrode and the second pixel electrode are electrically connected to a first transistor and a second transistor, respectively. Gates of the first transistor and the second transistor are electrically connected to each other. A potential is supplied to the first pixel electrode and the second pixel electrode through a wiring electrically connected to the first transistor and the second transistor. | 02-07-2013 |
20130075738 | Display Device and Electronic Device Using the Same - A display device with a compensation circuit that applies a fixed potential constantly to a gate electrode of a driving transistor for a certain period is provided. Specifically, each difference voltage value between an anode and a cathode of the light emitting element is utilized in the case where the light emitting element emits light and emits no light. In a case where the light emitting element emits light, a potential of the gate electrode of the driving transistor is to be held; and in a case where the light emitting element emits no light, a potential that certainly turns off the gate electrode of the driving transistor is kept on applying to the gate electrode of the driving transistor. | 03-28-2013 |
20130126912 | Light Emitting Device and Method of Driving the Light Emitting Device - A light emitting device that achieves long life, and which is capable of performing high duty ‘drive,’ by suppressing initial light emitting element deterioration is provided. Reverse bias application to an EL element (109) is performed one row at a time by forming a reverse bias electric power source line (112) and a reverse bias TFT (108). Reverse bias application can therefore be performed in synchronous with operations for write-in of an image signal, light emission, erasure, and the like. Reverse bias application therefore becomes possible while maintaining a duty equivalent to that of a conventional driving method. | 05-23-2013 |
20130193424 | ELEMENT SUBSTRATE AND LIGHT EMITTING DEVICE - A light emitting device and an element substrate which are capable of suppressing variations in the luminance intensity of a light emitting element among pixels due to characteristic variations of a driving transistor without suppressing off-current of a switching transistor low and increasing storage capacity of a capacitor. According to the invention, a depletion mode transistor is used as a driving transistor. The gate of the driving transistor is fixed in its potential or connected to the source or drain thereof to operate in a saturation region with a constant current flow. A current controlling transistor which operates in a linear region is connected in series to the driving transistor, and a video signal for transmitting a light emission or non-emission of a pixel is inputted to the gate of the current controlling transistor through a switching transistor. | 08-01-2013 |
20130221361 | SEMICONDUCTOR DISPLAY DEVICE - It is an object of the present invention to provide a semiconductor display device having an interlayer insulating film which can obtain planarity of a surface while controlling film formation time, can control treatment time of heating treatment with an object of removing moisture, and can prevent moisture in the interlayer insulating film from being discharged to a film or an electrode adjacent to the interlayer insulating film. An inorganic insulating film containing nitrogen, which is less likely to transmit moisture compared with an organic resin, is formed so as to cover a TFT. Next, an organic resin film containing photosensitive acrylic resin is applied to the organic insulting film, and the organic resin film is partially exposed to light to be opened. Thereafter, an inorganic insulting film containing nitrogen, which is less likely to transmit moisture compared with an organic resin, is formed so as to cover the opened organic resin film. Then, in the opening part of the organic resin film, a gate insulating film and the two layer inorganic insulating film containing nitrogen are opened partially by etching to expose an active layer of the TFT. | 08-29-2013 |
20130229117 | DISPLAY DEVICE AND ELECTRONIC DEVICE - A display device capable of displaying a picture of vivid colors maintaining a good balance of colors and a good balance of light-emitting brightnesses of the EL elements. The widths of the detour wirings supplying current to the power source feed lines are increased for those EL elements into which a current of a large density flows. This constitution decreases the wiring resistances of the detour wirings, decreases the potential drop through the detour wirings, and suppresses the amount of electric power consumed by the detour wirings. | 09-05-2013 |
20130248892 | LIGHT-EMITTING DEVICE - A-light-emitting device which realizes a high aperture ratio and in which the quality of image is little affected by the variation in the characteristics of TFTs. The channel length of the driving TFTs is selected to be very larger than the channel width of the driving TFTs to improve current characteristics in the saturated region, and a high V | 09-26-2013 |
20130256892 | DISPLAY DEVICE AND MANUFACTURING METHOD THEREOF - It is an object of the present invention to prevent an influence of voltage drop due to wiring resistance, trouble in writing of a signal into a pixel, and trouble in gray scales, and provide a display device with higher definition, represented by an EL display device and a liquid crystal display device. | 10-03-2013 |
20130277709 | DISPLAY DEVICE - Disclosed is a display device and an electronic apparatus incorporating the display device. The display device includes a transistor and a planarization film over the transistor. The planarization film has an opening where an edge portion is rounded. The display device further includes a first electrode over the planarization film and an organic resin film over the first electrode. The organic resin film also has an opening where an edge portion is rounded. The organic resin film is located in the opening of the planarization film. The first electrode and the transistor are electrically connected to each other through a conductive film. The first electrode is in contact with a top surface of the conductive film. Over the first electrode, a light-emitting member and a second electrode are provided. | 10-24-2013 |
20130313578 | METHOD OF DRIVING A LIGHT EMITTING DEVICE - The present invention is characterized in that a transistor with its L/W set to 10 or larger is employed, and that |V | 11-28-2013 |
20140110732 | SEMICONDUCTOR DEVICE - Semiconductor elements deteriorate or are destroyed due to electrostatic discharge damage. The present invention provides a semiconductor device in which a protecting means is formed in each pixel. The protecting means is provided with one or a plurality of elements selected from the group consisting of resistor elements, capacitor elements, and rectifying elements. Sudden changes in the electric potential of a source electrode or a drain electrode of a transistor due to electric charge that builds up in a pixel electrode is relieved by disposing the protecting means between the pixel electrode of the light-emitting element and the source electrode or the drain electrode of the transistor. Deterioration or destruction of the semiconductor element due to electrostatic discharge damage is thus prevented. | 04-24-2014 |
20140168196 | Light Emitting Device and Method of Driving the Light Emitting Device - A light emitting device that achieves long life, and which is capable of performing high duty drive, by suppressing initial light emitting element deterioration is provided. Reverse bias application to an EL element ( | 06-19-2014 |
20140171155 | Element Substrate and Light-Emitting Device - A potential of a gate of a driving transistor is fixed, and the driving transistor is operated in a saturation region, so that a current is supplied thereto anytime. A current control transistor operating in a linear region is disposed serially with the driving transistor, and a video signal for transmitting a signal of emission or non-emission of the pixel is input to a gate of the current control transistor via a switching transistor. | 06-19-2014 |
20140191239 | DISPLAY DEVICE - Disclosed is a display device and an electronic apparatus incorporating the display device. The display device includes a transistor and a planarization film over the transistor. The planarization film has an opening where an edge portion is rounded. The display device further includes a first electrode over the planarization film and an organic resin film over the first electrode. The organic resin film also has an opening where an edge portion is rounded. The organic resin film is located in the opening of the planarization film. The first electrode and the transistor are electrically connected to each other through a conductive film. The first electrode is in contact with a top surface of the conductive film. Over the first electrode, a light-emitting member and a second electrode are provided. | 07-10-2014 |
20140291657 | ELEMENT SUBSTRATE AND LIGHT EMITTING DEVICE - A light emitting device and an element substrate which are capable of suppressing variations in the luminance intensity of a light emitting element among pixels due to characteristic variations of a driving transistor without suppressing off-current of a switching transistor low and increasing storage capacity of a capacitor. According to the invention, a depletion mode transistor is used as a driving transistor. The gate of the driving transistor is fixed in its potential or connected to the source or drain thereof to operate in a saturation region with a constant current flow. A current controlling transistor which operates in a linear region is connected in series to the driving transistor, and a video signal for transmitting a light emission or non-emission of a pixel is inputted to the gate of the current controlling transistor through a switching transistor. | 10-02-2014 |
20140299991 | DISPLAY DEVICE AND MANUFACTURING METHOD THEREOF - It is an object of the present invention to prevent an influence of voltage drop due to wiring resistance, trouble in writing of a signal into a pixel, and trouble in gray scales, and provide a display device with higher definition, represented by an EL display device and a liquid crystal display device. | 10-09-2014 |