Patent application number | Description | Published |
20080272832 | Charge pump circuit and method of controlling the same - A charge pump circuit and related method are provided. The charge pump circuit includes first, second and third voltage generation units, first and second control units, and a latch-up prevention unit. The first generation unit regulates a first output signal, the second generation unit boosts a second output signal, and the third generation unit boosts a third output signal in response to the first and second output signals. The first control unit is connected between the first generation unit and the third generation unit, and the second control unit is connected between the second generation unit and the third generation unit. The first and second control units block respective outputs of the first and second generation units during the boosting time for the second output signal. The latch-up prevention unit prevents a latch-up operation caused by a parasitic transistor until the third output signal is maintained at a third voltage. | 11-06-2008 |
20080284497 | VOLTAGE GENERATOR THAT PREVENTS LATCH-UP - A voltage generator that prevents latch-up includes: a charge pump circuit that is controlled by first through third enable signals, boosts an internal power voltage generated from an external power voltage, and generates first through fourth voltages; a detector that detects the first through third voltages and generates first through third flag signals that go logic high when the first through third voltages reach predetermined respective voltage levels and maintain logic low when the voltages do not reach the predetermined respective voltage levels; and a charge pump controller that receives the first through third flag signals, and generates the first through third enable signals to have the first through fourth voltages sequentially generated. The voltage generator can prevent latch-up that may occur in a boosting mode or in a normal operation mode. | 11-20-2008 |
20080309226 | ORGANIC LIGHT EMITTING DISPLAY DEVICE AND FABRICATION METHOD FOR THE SAME - An organic light emitting display device includes a substrate having a pixel region in which at least one organic light emitting diode is formed and a non-pixel region other than the pixel region; and an encapsulation film for encapsulating the substrate. Here, the encapsulation film is made of by laminating at least one organic film and at least inorganic film and a desiccant formed in at least one of the organic film and the inorganic film corresponding to the non-pixel region of the substrate. | 12-18-2008 |
20090009055 | Organic light emitting display device and manufacturing method of the same - An organic light emitting display device having spacers and a manufacturing method thereof. The organic light emitting display device according to the present invention includes a first substrate divided into a pixel region and a non-pixel region surrounding the pixel region; a plurality of organic light emitting diodes having each pixel formed on the first substrate and provided onto the pixel region; a second substrate for encapsulating the pixel region; and a spacer arranged between the first substrate and the second substrate, provided in at least on region between pixels as a non-light emission region and containing a desiccant. | 01-08-2009 |
20090020592 | Method of joining and method of fabricating an organic light emitting diode display device using the same - A method of joining a flexible layer and a support includes forming a first metal layer on one surface of the flexible layer, forming a second metal layer on one surface of the support, cleaning the first metal layer and the second metal layer, and joining the first metal layer to the second metal layer, such that the first metal layer is between the flexible layer and the second metal layer. | 01-22-2009 |
20090021157 | Organic light emitting display and method of manufacturing the same - An organic light emitting display includes a substrate, an organic light emitting device on the substrate, the organic light emitting device including a first electrode, an organic emitting layer, and a second electrode, a UV light shielding layer having at least two layers, each layer absorbing different wavelengths of UV light, and an encapsulation layer sealing the organic light emitting device. | 01-22-2009 |
20090267487 | Organic light emitting display device - An organic light emitting display device includes a substrate; an organic light emitting unit formed on the substrate; and a sealing unit which seals the organic light emitting unit, wherein the sealing unit is formed by alternately stacking at least one first thin film and at least one second thin film, the first thin film being formed to surround a portion of the second thin film. | 10-29-2009 |
20090267882 | Common voltage generator, display device including the same, and method thereof - The common voltage generator includes an operational amplifier and a plurality of switches. The operational amplifier is configured to amplify a difference between a first voltage and a second voltage and to output the amplified voltage as a common voltage. The plurality of switches are configured to transmit a third voltage and a fourth voltage as a power supply to the operational amplifier in a first voltage output mode and to transmit a fifth voltage and a sixth voltage as a power supply to the operational amplifier in a second voltage output mode. | 10-29-2009 |
20090278865 | SOURCE DRIVER AND DISPLAY DEVICE INCLUDING THE SAME - A source driver having a small layout area and low power consumption includes a signal generation block generating a plurality of pulse width modulation (PWM) signals and a plurality of staircase waveform grayscale voltage signals according to a digital code generated based on an oscillation signal and a channel driver. The channel driver divides latched video data into upper bits and lower bits, generates a plurality of switching signals using one PWM signal selected from among the plurality of PWM signals in response to the lower bits, outputs one staircase waveform grayscale voltage signal selected from among the plurality of staircase waveform grayscale voltage signals in response to the upper bits, and outputs a particular grayscale voltage level included in the one staircase waveform grayscale voltage signal in response to the plurality of switching signals. | 11-12-2009 |
20100091002 | Switching circuit, DC-DC converter and display driver integrated circuit including the same - A switching circuit and a DC-DC converter including the same are provided. The switching circuit includes an output terminal, a plurality of input terminals, and a plurality of switches configured to selectively connect the plurality of input terminals to the output terminal. The plurality of switches include a first switch directly connected to the output terminal and a plurality of second switches connecting the plurality of input terminals to the first switch. The first switch is implemented using a high-voltage transistor. Each of the second switches is implemented using a low-voltage transistor. A gate of the high-voltage transistor is at least two times longer than a gate of the low-voltage transistor. The DC-DC converter increases or decreases a signal selected from among a plurality of input signals input through the input terminals by a predetermined voltage level. Most of switches in the switching circuit are implemented using low-voltage transistors, thereby decreasing the area of the switching circuit. | 04-15-2010 |
20110315314 | METHOD OF JOINING AND METHOD OF FABRICATING AN ORGANIC LIGHT EMITTING DIODE DISPLAY DEVICE USING THE SAME - A method of joining a flexible layer and a support includes forming a first metal layer on one surface of the flexible layer, forming a second metal layer on one surface of the support, cleaning the first metal layer and the second metal layer, and joining the first metal layer to the second metal layer, such that the first metal layer is between the flexible layer and the second metal layer. | 12-29-2011 |
20120176376 | METHOD AND SYSTEM FOR DISPLAYING ELECTRIC FIELD INFORMATION AND PORTABLE TERMINAL SUPPORTING THE SAME - A method, a system, and portable terminal display electric field information. The method includes collecting a sensor signal including location information and direction information of a portable terminal, transmitting the collected sensor signal to an information providing server, and receiving and outputting electric field information indicating an electric field intensity between the portable terminal and at least one base station located within a predetermined range of a direction in which the portable terminal is arranged among the at least one base station arranged around the portable terminal based on the sensor signal by the portable terminal. | 07-12-2012 |
20130070937 | APPARATUS AND METHOD FOR CONFIRMING CONTROL INFORMATION OF EARPHONE IN PORTABLE TERMINAL - An apparatus and method for confirming control information that is input through an earphone in a portable terminal are provided. The apparatus includes an interface to which an earphone connects, and a controller for creating bit information dependent on a key input provided from the earphone connected through the interface, and confirming control information corresponding to the bit information. | 03-21-2013 |