Patent application number | Description | Published |
20120133574 | SHIFT REGISTER UNIT, GATE DRIVE CIRCUIT, AND DISPLAY APPARATUS - A shift register unit. gate drive circuit. and display apparatus. The shift register unit comprises: input module for inputting first and second clock signals. frame start signal. high and low voltage signals, the first clock signal is identical with phase-inverted signal of the second clock signal within one frame; a processing module comprising multiple TFTs, for generating gate drive signal according to the first and second clock signals and frame start signal, controlling voltage of first node formed by TFTs lower than the low level of power supply signal during evaluation period of shift register unit, and resetting second node formed by TFTs to cut off transient DC path formed by input terminals of the high and low voltage signals, and at least one TFT in time; an output module for sending gate drive signal generated by the processing module. | 05-31-2012 |
20120287103 | PIXEL UNIT CIRCUIT, PIXEL ARRAY, DISPLAY PANEL AND DISPLAY PANEL DRIVING METHOD - A pixel circuit array is disclosed and includes pixel unit circuits, and each of the pixel unit circuit includes a precharge circuit, a compensation circuit, a holding circuit, a driving circuit, a light emitting circuit, a first power supply terminal, a second power supply terminal, a third power supply terminal, a scanning control terminal, a first control terminal and a second control terminal. With the pixel unit circuit, as long as the inputted direct-current reference voltage and the data voltage signal are not varied, the current delivered to the OLED remains constant, thus the uniformity of the OLED can be compensated for. | 11-15-2012 |
20120293482 | PIXEL UNIT CIRCUIT AND OLED DISPLAY APPARATUS - The present disclosure discloses a pixel unit circuit and an OLED display apparatus. The pixel unit circuit comprises a first sub-circuit module, a second sub-circuit module, a first capacitor and OLED. An input of the first sub-circuit module is connected to a data line; another input of the first sub-circuit module is connected to an output of the second sub-circuit module and a first terminal of the OLED; an output of the first sub-circuit module is connected to an input/output of the second sub-circuit module via the first capacitor; a voltage difference between positive power supply and negative power supply of a backboard is applied between an input of the second sub-circuit module and a second terminal of the OLED. The pixel unit circuit can compensate the aging of OLED devices, the non-uniformity of threshold voltage of TFT driving transistors, and IR Drop of the power supply of the backboard. | 11-22-2012 |
20120300894 | SHIFT REGISTER UNIT, GATE DRIVE CIRCUIT, AND DISPLAY APPARATUS - Provided are a shift register unit, a gate drive circuit, and a display apparatus. The shift register unit comprises: input module for inputting first clock signal, second clock signal, frame start signal, high voltage signal, and low voltage signal, first clock signal is identical with phase-inverted signal of second clock signal within one frame; a processing module comprising multiple TFTs, for generating gate drive signal according to the first clock signal, the second clock signal, and the frame start signal, and configuring positive feedback of voltage changes between first node and second node formed by the TFTs to cut off transient DC path formed by high voltage signal input terminal, low voltage signal input terminal, and at least one TFT in time; output module for sending the gate drive signal. The present disclosure decreases the transient current, and reduces the power consumption of the shift register unit. | 11-29-2012 |
20130175941 | VOLTAGE-DRIVEN PIXEL CIRCUIT, DRIVING METHOD THEREOF AND DISPLAY PANEL - A voltage-driven pixel circuit, a driving method thereof and a display panel including the voltage-driven pixel circuit are disclosed. The voltage-driven pixel circuit comprises a driving transistor, a retaining transistor, a switching transistor, a compensating transistor, a storage capacitance and an OLED device. The technical solutions disclosed here compensate for the unevenness of the threshold voltage of the N-type TFT transistors and OLED efficiently. | 07-11-2013 |
20130207100 | OXIDE TFT ARRAY SUBSTRATE, METHOD FOR MANUFACTURING THE SAME, AND ELECTRONIC APPARATUS USING THE SAME - Embodiments of the present invention provide an oxide TFT array substrate and a method for manufacturing the same, and an electronic device comprising the same. In the embodiment of the method, an active layer and a stop layer are sequentially formed on a gate insulating layer and are patterned twice by a single-step continuous etch method. The embodiments of the present invention can avoid damages upon the surface and characteristics of an oxide semiconductor film during the processes such as removal, cleaning and the like, so the characteristics and yield of products can be effectively enhanced, and the costs for research and preparation are reduced. | 08-15-2013 |
20130215092 | OLED PANEL AND METHOD FOR DRIVING THE SAME - The present invention discloses an OLED panel for improving the hysteresis effect of TFT without increasing the area of the pixel circuit and at the same time ensuring the opening ratio. Said OLED panel includes a substrate and a pixel unit array formed thereon, the pixel unit array comprises a plurality of pixel units defined by the intersections of scanning lines and data lines, and each unit includes a driving TFT and an OLED, and the driving TFT has a source connected to a high voltage signal terminal in a backboard, a drain connected to an anode of the OLED; a plurality of resetting TFTs is arranged in the peripheral area of the pixel unit array on the substrate, and the resetting TFT has a gate connected a pre-controlling signal terminal, a source connected to a resetting signal terminal, and each resetting TFT corresponds to a data line one-to-one. | 08-22-2013 |
20130293450 | PIXEL STRUCTURE OF ORGANIC LIGHT EMITTING DIODE AND DRIVING METHOD THEREOF - The present invention provides a pixel structure of an organic light emitting display device and driving method thereof. The pixel structure comprises first to fifth thin film transistors, a capacitor and an OLED device. Following steps are performed for the pixel structure in a refresh process of each frame of images: during a pre-charging period, the scan line and a first control signal (EM) are at a low level, a second control signal (EMD) is at a high level; during a compensation period, the scan line is at a low level, the first control signal (EM) and the second control signal (EMD) are at a high level; and during a light emitting period, the scan line is at a high level, the first control signal (EM) and the second control signal (EMD) are at a low level. | 11-07-2013 |
20140063080 | Method And Apparatus For Controlling Image Display - The present disclosure discloses a method and an apparatus for controlling image display, which achieve uniformity of image display and remove the image-retention in a compensation manner of high precision, high efficiency and low cost. The method for controlling image display comprises: reading gray scales of all sub-pixels of a current frame image displayed by a display device; determining an ideal luminance corresponding to the gray scale according to a predetermined ideal corresponding relationship between the gray scales and luminance of respective sub-pixels respectively; determining an adjusted gray scale corresponding to the ideal luminance according to the predetermined original corresponding relationship between the gray scales and the luminance of respective sub-pixels respectively; driving the display device to display the current frame image according to the adjusted gray scale. | 03-06-2014 |
20140064438 | Shift Register, Gate Driving Circuit And Display - A shift register, comprising a plurality of shift register sub-units connected in cascade, each of the plurality of shift register sub-units comprising first to third TFTs, an eleventh TFT, a first capacitor and a first reset control module for controlling the second TFT to be turned on or off. Besides the shift register sub-unit at a first stage, for each of the shift register sub-units at other stages, the second TFT gate control terminal thereof is connected to the third TFT gate control terminal of the shift register sub-unit at a previous stage. Accordingly, a gate driving circuit comprising the shift register and a display comprising the gate driving circuit are provided. Compared with the prior art, reliability of the shift register is highly improved and area occupied by the shift register is smaller. | 03-06-2014 |
20140079175 | Shift Register Driving Apparatus And Display - A shift register, a driving apparatus and a display. The shift register comprises: an evaluating unit for receiving a second clock signal and outputting an output signal to a signal output terminal under a control of an input signal; a reset controlling unit, a first terminal of which being connected to the evaluating unit and receiving the input signal, a second terminal of which receiving a first clock signal, a third terminal of which receiving a low level signal, for inputting a control signal to a reset unit under controls of the input signal and the first clock signal; the reset unit for receiving a high level signal and resetting the signal output terminal under a control of the control signal input by the reset controlling unit. When the shift register evaluates the output terminal, the gate of the reset transistor ( | 03-20-2014 |
20140093028 | SHIFT REGISTER UNIT AND DRIVING METHOD THEREOF, SHIFT REGISTER AND DISPLAY APPARATUS - The present disclosure relates to a shift register unit and a driving method thereof, a shift register and a display apparatus. The shift register unit includes a carry signal output terminal(CA(n)); a driving signal output terminal(OUT(n)); a staged output module( | 04-03-2014 |
20140126093 | Electro-Static Discharge Protection Circuit and Method for Driving the Same and Display Panel - The invention discloses an ESD protection circuit and a method for driving the same and a display panel. The ESD protection circuit in the present invention comprises: a first TFT with a drain connected to a data signal line, a source and a gate connected together as a node; a second TFT with a drain connected to a first power supply line, a source connected to the data signal line, and a gate connected to the node; a third TFT with a drain connected to the data signal line, a source connected to a second power supply line, and a gate connected to a third power supply line; a forth TFT with a drain connected to the node, a source and a gate connected to the second power supply line; and a bootstrap capacitor connected between the node and the data signal line. | 05-08-2014 |
20140126094 | ELECTROSTATIC DISCHARGE PROTECTION CIRCUIT AND DISPLAY DEVICE INCLUDING THE SAME - An electrostatic discharge (ESD) protection circuit and a display device comprising the protection circuit are provided. The protection circuit comprises a first depletion mode thin-film transistor, a second depletion mode thin-film transistor, a third depletion mode thin-film transistor, and a voltage dividing unit. This, when in normal operation, effectively prevents a signal line from releasing a large amounts of current, ensures that an internal array of the display device operates normally, and when an ESD occurs, allows for rapid discharge of an electrostatic charge accumulated on the signal line and ensures that the internal array of the display device is free from the electrostatic damage. Hence, application of the ESD protection circuit allows for utilization of low-cost depletion mode thin-film transistors to implement of electrostatic discharge and for reduced the manufacturing cost of the ESD protection circuit, thus reducing the manufacturing costs of the display device comprising the protection circuit. | 05-08-2014 |
20140132642 | PIXEL CIRCUIT, DISPLAY DEVICE AND DRIVING METHOD OF PIXEL CIRCUIT - The embodiments of the invention disclose a pixel circuit, a display device and a driving method thereof. The pixel circuit comprises a light-emitting element; a driving TFT, its drain is input a power supply voltage signal; a first TFT, its drain is connected with a source of the driving TFT, its source is connected with the light-emitting element, its gate receives a first control signal; a second TFT, its source receives a data signal, its drain is connected with a gate of the driving TFT, its gate receives a scanning signal; a third TFT, its source receives a reference voltage signal, its gate receives the scanning signal; a fourth TFT, its source is connected with a drain of the third TFT, its drain is connected with the gate of the driving TFT and the drain of the second TFT, its gate receives a second control signal; and a capacitor. | 05-15-2014 |
20140192444 | Electro-Static Discharge Protection Circuit, Array Substrate And Display Apparatus - Provided is an electro-static discharge protection circuit, an array substrate and a display apparatus, being capable of reducing power consumption while improving reliability of the display apparatus. The electro-static discharging protection circuit comprises: a first thin film transistor (T1), having a drain connected to a high level output terminal (VGH); a second thin film transistor (T2), having a source connected to a source of the first thin film transistor (T1) as a discharging terminal (O), a drain connected to the high level output terminal (VGH) and a gate connected to a low level output terminal (VGL); a third thin film transistor (T3), having a source and a gate connected to the low level output terminal (VGL) and a drain connected to the gate of the first thin film transistor (T1); and a voltage difference maintaining unit connected between the gate of the first thin film transistor (T1) and the discharging terminal (O), wherein the voltage difference maintaining unit is used to make the voltage difference between the gate of the first thin film transistor (T1) and the discharging terminal (O) maintain unchanged, the discharging terminal (O) being used for connecting gate lines or data lines. | 07-10-2014 |
20140312784 | PIXEL CIRCUIT AND DRIVING METHOD THEREOF, ORGANIC LIGHT-EMITTING DISPLAY PANEL AND DISPLAY APPARATUS - The present disclosure relates to the field of organic light-emitting display, and provides a pixel circuit, a driving method thereof, an organic light-emitting display panel and a display apparatus, comprising a driving transistor, a first storage capacitor, a collecting unit, a writing unit and a light-emitting unit; wherein, the collecting unit is used. for collecting the threshold voltage of the driving transistor and storing the threshold voltage into the first storage capacitor, under the control of the first scan signal; the writing unit is used for storing the data voltage inputted from the input terminal for the data voltage under the control of the second scan signal; and the light-emitting unit is used for emitting lights, driven by the data voltage and a voltage inputted from the input terminal for the controllable low voltage, under the control of the light-emitting control signal. Thus an organic light-emitting device is not affected by the threshold voltage shift of the driving transistor, which may enhance the image uniformity of the organic light-emitting display panel effectively, slow down the decay speed of an organic light-emitting device and ensure the uniformity and a constancy of brightness of the organic light-emitting display panel. | 10-23-2014 |
20140362130 | PIXEL CIRCUIT, DRIVING METHOD THEREOF AND PIXEL ARRAY STRUCTURE - Disclosed are a pixel circuit, a driving method thereof and a pixel array structure. The pixel circuit comprises a load controlling module( | 12-11-2014 |
20150028765 | PIXEL CIRCUIT, DRIVING METHOD THEREOF AND DISPLAY DEVICE - The present invention relates to the field of display technology, and provides a pixel circuit, a driving method thereof, and a display device, so as to compensate for the TFT threshold voltage drift, thereby to improve the brightness non-uniformity of the display device and prolong the service life thereof. The pixel circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a first storage capacitor, a second storage capacitor, and a light-emitting element. The present invention is adapted to manufacture a display panel. | 01-29-2015 |