592 results about "AMOLED" patented technology

A pixel structure of an active matrix organic light-emitting diode (AMOLED) includes an organic light-emitting diode (OLED), a data line, at least one scan line, at least one switch thin film transistor (TFT), at least one driving TFT and at least one storage capacitor with two transparent electrodes. Since both the electrodes of the transparent storage capacitor are formed by transparent material, the aperture ratio of the pixel and the area of the capacitor largely increase and can reach 50%˜95% of a pixel area. Thus, the display quality of an AMOLED panel can be improved.

An active matrix type organic light emitting diode (AMOLED) device and its fabrication method are discussed. In one embodiment, an OLED device includes an EL configured to emit light, a driving TFT configured to control the EL, a storage capacitor coupled to the driving TFT, and at least one insulation layer configured to insulate at least one of the EL, the driving TFT and the storage capacitor, and including a plurality of recesses formed on a surface of the at least one insulation layer.

The invention provides a pixel compensation circuit. The pixel compensation circuit comprises a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a first capacitor, a second capacitor and an organic light-emitting diode, wherein a first end of the first switch receives data voltage; a second end of the first switch receives a first switch signal; a second end of the second switch receives the first switch signal; a second end and a third end of the third switch are both connected to first voltage; a first end of the fifth switch receives reference voltage; a second end of the fifth switch receives a third switch signal; a second end of the sixth switch receives the third switch signal; a first end of the second capacitor is connected to a second end of the first capacitor; a second end of the second capacitor receives a second switch signal; a first end of the organic light-emitting diode is connected to a first end of the sixth switch; and a second end of the organic light-emitting diode is connected to second voltage. Compared with the prior art, the pixel compensation circuit has the advantages that the threshold value voltage of the switches is compensated before a lightening period, so that the influence of the threshold vale voltage on OLED (Organic Light Emitting Diode) current is eliminated, and stable current output of an OLED in a pixel can be kept.

The invention provides a complementary driving type pixel circuit in the technical field of organic light emitting diodes (OLEDs), comprising an OLED and a driving circuit, wherein the anode of the OLED is connected with a power supply while the cathode thereof is connected with the output end of the driving circuit to obtain driving current. The invention not only can solve the threshold voltage drift problem of a driving TFT (Thin Film Transistor) of a voltage-type driving pixel circuit in a three-dimensional AMOLED (Active Matrix Organic Light Emitting Diode), but also can enable two parallel driving TFTs to periodically supply power to the OLED to halve the work time of the TFTs so as to prolong the service life of the TFTs and finally achieve the effect of prolonging the service life of the AMOLED.

The invention discloses an AMOLED (Active Matrix / Organic Light-Emitting Diode) pixel circuit and a driving method thereof. The AMOLED pixel circuit comprises pixel units which are distributed in an n-row, m-column matrix, the pixel units are connected with a data driver through data lines and a scanning driver through scanning lines, each pixel unit comprises an organic light-emitting diode (OLED), and n and m are natural numbers; each row pixel unit comprises a first scanning control line Sn1, a second scanning control line Sn2 and a third scanning control line Sn3; the OLED is connected between the drain of a sixth transistor T6 and a second power supply ELVSS; and each row pixel unit also comprises threshold voltage compensation transistors T4 and T8 and leakage current compensation transistors T1 and T7. By arranging the threshold voltage compensation transistors and the leakage current compensation transistors, the response characteristic of the active matrix OLED is improved, and thereby images with uniform image quality can be displayed.

The invention discloses an active-matrix organic light-emitting diode (AMOLED) display apparatus and a brightness compensation method thereof. At an initial compensation stage, a CCD can be used for performing brightness calibration on a display screen so that a data voltage compensation value of each sub pixel when the brightness parameter value of a display panel is a set value is obtained, first data voltage is output to a corresponding pixel circuit according to the data voltage compensation value of each sub pixel, and at the moment, induction voltage of each sub pixel is taken as initial reference voltage of each sub pixel when the brightness parameter value of the display panel is the set value; and at a subsequent compensation stage, through adjusting the data voltage of each sub pixel, the induction voltage of each sub pixel is enabled to be equal to the corresponding initial reference voltage when the brightness parameter value of the display panel is the set value, and brightness uniformity compensation of each sub pixel in the subsequent compensation state is realized, such that the uniformity and the accuracy of initial brightness compensation are improved, pixel aging is accurately compensated, and the uniformity and the accuracy of subsequent compensation are improved.

The invention provides an AMOLED brightness compensation method and an AMOLED driving system. A compensation unit (4) comprising first, second and third brightness sensors (42, 43, 44) and a compensation IC (41) and a test pixel unit (5) comprising red, green and blue test pixels (51, 52, 53) are additionally arranged. Brightness of the red, green and blue test pixels (51, 52, 53) at the initial moment and the compensation moment is respectively sensed by the first, second and third brightness sensors (42, 43, 44) so that compensation voltage respectively required by red, green and blue organic light-emitting diodes can be calculated by the compensation IC (41), then brightness compensation is respectively performed on the red, green and blue organic light-emitting diodes, and thus reduction of displayer brightness caused by brightness attenuation of the organic light-emitting diodes and color cast caused by difference of brightness attenuation speed of different colors of organic light-emitting diodes can be improved and luminescence brightness and color gamut of the AMOLED can be maintained.

Embodiments of the present invention provide an AMOLED (Active Matrix / Organic Light Emitting Diode) pixel unit circuit and a display panel. According to the invention, a touch screen panel circuit is integrated in the AMOLED pixel unit circuit, and an AMOLED display panel with functions of a touch screen panel is produced. The AMOLED pixel unit circuit comprises a driving module for amplifying a sensing signal generated by a touch sensing module for a sensing signal output module to output, and driving a light emitting module; a light emitting control module for controlling the light emitting module to emit light; a threshold compensation module for compensating a threshold voltage of the driving module; a charging module for charging the threshold compensation module; the touch sensing module for generating a sensing signal and outputting the sensing signal to the driving module; and the sensing signal output module for outputting the sensing signal amplified by the driving module.

Disclosed herein is an Active Matrix Organic Light-Emitting-Diode (AMOLED) drive circuit using transient current feedback. The AMOLED drive circuit includes a current Digital-to-Analog Converter (DAC), a data line drive transistor, a constant current source, a variable current source, a differential amplifier, and a transient charging current control unit. The DAC generates current corresponding to input digital data. The data line drive transistor is configured such that the drain terminal thereof is connected to the output node of the current DAC. The constant current source is connected between the source terminal of the data line drive transistor and a ground. The variable current source is connected between both the output node of the current DAC and the drain terminal of the drive transistor, and a voltage source. The differential amplifier is configured to input the output voltage thereof to the gate terminal of the drive transistor. The transient charging current control unit is configured to increase or decrease the bias current of the variable current source depending on variation in the voltage of the output node of the current DAC.

The invention provides a driving method and driving circuit of a touch control module set, a touch control module set, a panel and a device. The driving method of the touch control module set is used for driving a self-contained active-matrix organic light emitting diode (AMOLED) touch control module set, wherein the self-contained AMOLED touch control module set comprises a touch control electrode and a pixel driving circuit. The driving method comprises the following steps that: in a touch control time period, touch control scanning signals are outputted to the touch control electrode; and the touch control scanning signals are outputted to control lines connected with the pixel driving circuit and signal lines connected with the pixel driving circuit. According to the driving method and driving circuit of the touch control module set, the touch control module set, the panel and the device of the invention, the touch control electrode as well as all the signal lines and control lines below the touch control electrode are synchronously driven, so that the influence of capacitance on the touch control electrode can be offset.

This invention presents a scheduling method and algorithm for calibration of pixels in active-matrix organic light-emitting diode (AMOLED) displays. The pixels are calibrated based on their aging and usage during the normal operation of active matrix display. The display data is used to determine the pixels with high brightness for calibration, which guarantees high speed and accurate calibration. This method can be used with any current programmed pixels, in particular, current mirror based designs.

The embodiment of the invention provides a pixel unit circuit for an organic LED of an active matrix, and a display panel; and is used for integrating a touch screen circuit in the AMOLED pixel unit circuit and manufacturing the AMOLED display panel having a touch screen function. The AMOLED pixel unit circuit comprises a driving module, a luminescence control module, a threshold compensation module, a touch induction module and an induction-signal output module, wherein the driving module is used for amplifying induction signals generated by the touch induction module, outputting by the induction-signal output module and driving a luminescence module; the luminescence control module is used for controlling the luminescence module to luminesce; the threshold compensation module is used for carrying out threshold voltage compensation to the driving module; the touch induction module is used for generating the induction signals and outputting the signals to the driving module and the induction-signal output module is used for outputting the induction signals amplified by the driving module.

A touch screen panel Active Matrix Organic Light Emitting Diode (AMOLED) display device for decreasing the thickness of a mobile terminal and improving a degree of freedom in design is provided. The touch screen panel AMOLED display device includes a flexible AMOLED disposed on the bottom of a window, and a Chip-On-Film (COF) film connected to the flexible AMOLED and coupled with a flexible AMOLED driver Integrated Circuit (IC). Therefore, the thickness of the touch screen panel AMOLED display device may be decreased, and damage of the AMOLED due to an external shock may be prevented. Additionally, separation of the flexible AMOLED driver IC from a mounting surface may be prevented.

The invention provides an AMOLED voltage external compensation method and circuit. The method includes the following steps of comparing the magnitude of a driving voltage of an OLED with the magnitude of a preset reference voltage through a comparator and beginning voltage compensation if the magnitude of the driving voltage of the OLED is less than the magnitude of the preset reference voltage. The voltage compensation includes the following steps of obtaining a voltage difference of between the driving voltage and the preset reference voltage through a subtractor, outputting a position signal of the comparator, looking up digital quantity which needs to be compensated, an output signal of the comparator and the position signal of the comparator according to the voltage difference, controlling a correction unit to correct an image signal which is input into the OLED according to the digital quantity through a voltage controller; conducting conversion on the corrected image signal through a digital-to-analog conversion module, obtaining a corrected image voltage signal and inputting the corrected image voltage signal to the OLED, repeating the voltage compensation process until the driving voltage is equal to the preset reference voltage, and stopping the voltage compensation. According to the AMOLED voltage external compensation method and circuit, a duty ratio of a pixel unit is improved, time for displaying an image is shortened, the luminance of the OLED is only related to the magnitude of Vdata_n, and the luminance of the OLED is not related to a threshold voltage which drives a TFT or electron mobility.

The invention discloses an AMOLED pixel circuit and a drive method. The AMOLED pixel circuit comprises a first switch transistor (T1), a second switch transistor (T2), a driving transistor (T3), an organic light-emitting diode (OLED), a data line (Vdata), a first scanning control line (Vscan1), a second scanning control line (Vscan 2), a storage capacitor (Cst) and a programming and erasing signal line (Vpe). The drive method comprises a threshold voltage resetting stage, a threshold voltage compensating stage, a drive voltage writing-in stage and a light emitting stage. The AMOLED pixel circuit has the advantages of being simple in structure, easy to operate, small in size, high in opening rate, low in power consumption and the like and is suitable for high-resolution and large-size flat panel display.

Devices, structures, materials and methods for vertical light emitting transistors (VLETs) and light emitting displays (LEDs) are provided. In particular, architectures for vertical polymer light emitting transistors (VPLETs) for active matrix organic light emitting displays (AMOLEDs) and AMOLEDs incorporating such VPLETs are described. Porous conductive transparent electrodes (such as from nanowires (NW)) alone or in combination with conjugated light emitting polymers (LEPs) and dielectric materials are utilized in forming organic light emitting transistors (OLETs). Combinations of thin films of ionic gels, LEDs, porous conductive electrodes and relevant substrates and gates are utilized to construct LETs, including singly and doubly gated VPLETs. In addition, printing processes are utilized to deposit layers of one or more of porous conductive electrodes, LEDs, and dielectric materials on various substrates to construct LETs, including singly and doubly gated VPLETs.

The invention provides an AMOLED pixel driving circuit and driving method, and a display panel. The AMOLED pixel driving circuit adopts a 7T1C structure, and has a reset phase, a data signal writing and threshold voltage compensation phase, and a light emission phase, which can compensate for threshold voltage drift of a first thin film transistor, that is, a driving thin film transistor; and in the light emitting phase, a connection path between a fourth thin film transistor in which the leakage occurs and a gate of the first thin film transistor, that is, the driving thin film transistor, isblocked by a second thin film transistor, which can reduce the gate potential drift of the driving thin film transistor due to leakage during the light emitting phase, and improve the AMOLED image quality.

The invention provides a compensation method and a compensation circuit for AMOLED threshold voltage. The compensation circuit comprises a scanning transistor, a driving transistor, a light emitting control transistor, an initialization transistor and a zero clearing transistor, wherein the scanning transistor controls whether image data are input into a pixel unit, the grid electrode of the scanning transistor receives scanning signals, and the drain electrode of the scanning transistor receiving the image data; the driving transistor drives an OLED to emit light according to the image data, and the grid electrode of the driving transistor is connected with the source electrode of the scanning transistor; the light emitting control transistor controls connection and disconnection between the driving transistor and the OLED, the grid electrode of the light emitting control transistor receives light emitting control signals, the drain electrode of the light emitting control transistor is connected with the source electrode of the driving transistor, and the source electrode of the light emitting control transistor is connected with the positive electrode of the OLED; the initialization transistor controls initialization voltage of the positive electrode of the OLED, the drain electrode of the initialization transistor is connected with the initialization voltage, the source electrode of the initialization transistor is connected with the positive electrode of the OLED, and the grid electrode of the initialization transistor receives initialization control signals; the zero clearing transistor carries out zero clearing on electric charges between the grid electrode and the source electrode of the driving transistor, the drain electrode of the zero clearing transistor is connected with the grid electrode of the driving transistor, the source electrode of the zero clearing transistor is connected with the source electrode of the driving transistor, and the grid electrode of the zero clearing transistor receives the initialization control signals. By means of the compensation method and the compensation circuit for the AMOLED threshold voltage, compensation for the threshold voltage of a driving tube is achieved, and bad influences, from back flushing voltage caused by stray capacitance, on driving current are reduced.

A method and an apparatus for providing a Graphical User Interface (GUI) on an Active Matrix Organic Light-Emitting Diode (AMOLED) display of a device for reducing an image sticking effect are provided. The method includes displaying at least one item at an initial position on a screen of the display device, turning off the screen according to a predefined condition, receiving a display-on input command, and shifting the at least one item as much as a predefined distance from the initial position on the screen.

The invention discloses an active matrix organic light emitting diode (AMOLED) and a drive circuit and method of the AMOLED, relating to the technical field of organic light emitting display and aiming to improve the luminance uniformity of the AMOLED. The drive circuit of the AMOLED comprises a first transistor, a second transistor, capacitors, an organic light emitting diode and a voltage regulating module, wherein the voltage regulating module is connected among a first line scanning signal terminal, a second line scanning signal terminal, a high level signal terminal and a reference signal terminal, is connected with the capacitors and the first transistor, and is used for regulating a gate-source voltage of the first transistor connected with the capacitors so as to allow a drive circuit of the first transistor in a saturated state to be unrelated with a threshold voltage of the first transistor. The AMOLED is applicable to the organic light emitting display.

The invention provides a compensation method and a compensation system for AMOLED pixel luminance. The compensation method comprises the following steps that 1) a pixel is closed, the light intensity of ambient light is detected, and the first light intensity value L1 is obtained; 2) a luminance signal of the pixel is set to be a reference signal Dref, the pixel emits light under the reference signal Dref, the second light intensity value L2 is detected and obtained, and the actual light intensity value L3 of the pixel satisfies the equation that L3=L2-L1; 3) the actual light intensity value L3 is compared with the reference signal Dref, a corresponding compensation signal Dcom is generated, and compensation is carried out on the luminance signal of the pixel. The compensation system comprises a detection module, a comparing module and a compensation module. According to the compensation method and the compensation system for the AMOLED pixel luminance, the method of optical feedback and signal compensation is adopted for improving uniformity of the AMOLED displaying luminance, and therefore quality of image display is improved. The compensation method and the compensation system for the AMOLED pixel luminance are simple, and industrialization is easily achieved.

The embodiment of the invention provides an OLED (Organic Light Emitting Diode) array substrate, a manufacture method thereof and a touch display device, relates to the technical field of display, and can integrate a touch structure into a flexible AMOLED (Active Matrix / Organic Light Emitting Diode). The OLED array substrate comprises an underlying substrate, a thin film transistor arranged on the underlying substrate, and a flat layer which covers the thin film transistor. The OLED array substrate also comprises a touch sensor positioned on one side, which deviates from the thin film transistor, of the flat layer, and the touch sensor comprises a first touch electrode and a second touch electrode, wherein the firs touch electrode and the second touch electrode are mutually insulated.

The invention provides an AMOLED (active-matrix organic light emitting diode) display device and a compensation method thereof. The display device comprises a pixel unit and a voltage drop compensation unit. The voltage drop compensation unit comprises a control subunit and a detection subunit, wherein the detection subunit is used for acquiring voltage of a power supply node of the pixel unit and sending the voltage to the control subunit; and the control subunit is used for determining voltage variation of the power supply node according to the voltage and standard voltage and modifying data signals of the corresponding pixel unit based on the voltage variation so as to compensate the voltage variation. The AMOLED display device and the compensation method thereof provided by the invention can compensate voltage drop (IR Drop) generated by power supply voltage on a wire, so that the brightness uniformity of an AMOLED display panel can be improved, and a problem of brightness nonuniformity caused by the IR Drop is also solved.

A current driving apparatus and method for active matrix organic light emitting diode (AMOLED) includes two abutting sub-pixels (an odd sub-pixel and an even sub-pixel). The driving apparatus of each sub-pixel includes a writing element, a switching element, a driving element, a control element, a storage element, and a light emission element. The driving circuit includes odd line enable for the odd sub-pixels, even line enable for the even sub-pixels, a dataline shared by odd sub-pixels and even sub-pixels, a scan line, a supply line, and a common line. The invention can improve the uniformity of the AMOLED panel and reduce the number of required data line.

The invention relates to an AMOLED pixel drive circuit comprising a first thin film transistor (T1), a second thin film transistor (T2), a third thin film transistor (T3), a fourth thin film transistor (T4), a first capacitor (C) and a second capacitor (Cst) and an organic light-emitting diode (D1), wherein a top gate electrode of the first thin film transistor (T1) is connected with a first node (G), a bottom gate electrode of the first thin film transistor (T1) is connected with a second node (B), a source electrode and a drain electrode of the first thin film transistor (T1) are respectively connected with a power source high potential (VDD) and a third node (S), a gate electrode of the second thin film transistor (T2) is connected with a scanning line (Scan), a source electrode and a drain electrode of the second thin film transistor (T2) are respectively connected with the first node (G) and a first data line (Data1), a gate electrode of the third thin film transistor (T3) is connected with the scanning line (Scan), a source electrode and a drain electrode of the third thin film transistor (T3) are respectively connected with a detecting signal line (Sense) and a third node (S), a gate electrode of the fourth thin film transistor (T4) is connected with the scanning line (Scan), a source electrode and a drain electrode of the fourth thin film transistor (T4) are respectively connected with the second node (B) and a second data line (Data2), the first capacitor (C) is connected with the second node (B) and the power source high potential (VDD), the second capacitor (Cst) is connected with the first node (G) and the third node (S), and an anode of the organic light-emitting diode (D1) is connected with the third node (S). The AMOLED pixel drive circuit can be used for effectively compensating TFT driving electric drifting.

The invention provides an AMOLED pixel driving system and an AMOLED pixel driving method. The AMOLED pixel driving system comprises a 4T1C (four thin-film transistors and one capacitor) pixel driving circuit and an initial voltage power supply module electrically connected with the pixel driving circuit. The initial voltage power supply module provides a high-level initial signal for the pixel driving circuit in the light emitting stage. The threshold voltage of a driving thin-film transistor can be compensated effectively, and the current flowing through an organic light emitting diode can be stabilized. Moreover, the leakage currents of the gate and the source of the driving thin-film transistor in the light emitting stage can be reduced, and the stability of compensation data in the light emitting stage and the threshold voltage compensation effect can be improved.

The invention discloses an AMOLED (Active Matrix / Organic Light Emitting Diode) driving circuit and method, and an AMOLED display. The AMOLED driving circuit is characterized in that the AMOLED driving circuit comprises a light emitting device, a first switching tube, a voltage regulating module, a driving tube and a capacitor. According to the AMOLED driving circuit, the light emitting device is driven by the driving tube under the control of the voltage regulating module, and the driving current provided by the driving tube is unrelated to Vth (threshold voltage) of the driving tube. Therefore, the driving current which flows through the light emitting device is not affected by poor uniformity and shift of the Vth, and the uniformity of the driving current which flows through the light emitting device is increased, thereby increasing the uniformity of the AMOLED brightness.

The present invention provides an AMOLED pixel driving circuit and a pixel driving method. The AMOLED pixel driving circuit adopts a 6T2C structure, and comprises a first thin film transistor used as a driving thin film transistor, a second thin film transistor, a third thin film transistor, a fourth thin film transistor, a fifth thin film transistor, a sixth thin film transistor, a first capacitor, a second capacitor and an organic light emitting diode. By accessing a first scanning signal, a second scanning signal, a third scanning signal, a fourth scanning signal, a data signal voltage, an initialization voltage, a power supply positive voltage and a power supply negative voltage in the circuit, the circuit can compensate the threshold voltage of the driving thin film transistor effectively, thereby solving the problem that due to the threshold voltage shift, a current flowing through the organic light emitting diode is not stable, guaranteeing the uniform luminance of the organic light emitting diode, and improving a picture display effect.

The invention provides an AMOLED pixel driving circuit and a pixel driving method. The pixel driving circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor,a fifth transistor, a sixth transistor, a first storage capacitor, a second storage capacitor and a light-emitting diode which are connected with a first voltage end, a second voltage end, a light-emitting control signal, a reset signal end, a data input end, a scanning signal end and a reset voltage end correspondingly; the pixel driving method comprises an initialization step, a threshold valuestorage step, a data writing-in step and a light emitting step. According to the AMOLED pixel driving circuit and the pixel driving method provided by the invention, the influences of threshold voltage on light emission is compensated by correcting the data voltage, meanwhile, the display nonuniformity caused by IR voltage drop is avoided, the picture display quality is improved, moreover, through resetting of an OLED, the anode of the OLED is at a relatively low electric potential under a black picture, ghost appearing on the picture is avoided, in addition, the darkness of the black pictureis improved, and thus high-quality image display is provided.