Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd.

Shenzhen China Star Optoelectronics Technology Co., Ltd.

Other

Zhenling Wang

Taijiun Hwang

Tai-jiun Hwang

Tai Jiun Hwang

Zhen Wu

Lei Gao

Limin Wang

Yuchao Zeng

Zhiyi Chen

Pingsheng Kuo

Fan Tian

Jih Shiang Lee

Lindiao Zheng

The present disclosure proposes a pixel driving circuit and a display device. The pixel driving circuit comprises a driving transistor, a first data writing module and a second data writing module. The driving transistor comprises: a channel in a channel layer, a first gate in a first gate layer, and a second gate in a second gate layer, and an output end electrically connected to a light generating unit. The first gate and the second gate are respectively located at opposite sides of the channel. The first data writing module comprises an output end electrically connected to the first gate. The second data writing module comprises an output end electrically connected to the second gate.

Pixel driving circuit and display device

A driving circuit, a display panel, and a display device are disclosed. In the driving circuit, the display panel, and the display device disclosed in the present disclosure, the gamma module outputs the first initialization voltage and the second initialization voltage when the display panel is in the internal compensation mode, and the gamma module outputs the third initialization voltage and the reference voltage when the display panel is in the detection mode.

Driving circuit, display panel and display device

In the pixel driving circuit, a cathode of a light-emitting device is connected to an output terminal of a driving module; during a first detection period, an anode of the light-emitting device is connected to a low electrical potential power signal; during a second detection period and a display period, the anode of the light-emitting device is connected to a high electrical potential power signal; and in a light-emitting phase of the display period, voltage values of the output terminals of the driving module are all within a preset range in the pixel driving circuit corresponding to different sub-pixels.

Pixel driving circuit and display panel configured to detect first and second threshold voltages of a driving module

The present disclosure provides a pixel compensation driving circuit, which compensates an actual threshold voltage of a driving transistor, and finally makes current flowing through a light-emitting element independent from the actual threshold voltage of the driving transistor, thereby eliminating a drift of the actual threshold voltage of the driving transistor which causes uneven display of a display device, and improving display effect of a screen. The present disclosure also provides a pixel compensation driving method for driving the pixel compensation driving circuit, and a display device including the pixel compensation driving circuit.

Pixel compensation driving circuit, driving method thereof, and display panel

The present disclosure proposes an OLED pixel compensation circuit and an OLED pixel compensation method. The OLED pixel compensation circuit includes an OLED, a driving transistor, a first TFT, a second TFT, a third TFT, a fourth TFT, a first capacitor, and a second capacitor. The present disclosure adopts 5T2C structure and the driving transistor is a double gate TFT to compensate the variance of the threshold voltage such that the luminance evenness is raised and the lifetime of the product is extended.

OLED pixel compensation circuit and OLED pixel compensation method

A method of displaying an image and an image display device are disclosed. The method is implemented by calculating a total current value of subpixels of an image to be displayed, and comparing the total current value of the subpixels with a total current threshold, thereby to output a gain factor for adjusting brightness of an image to be displayed, so that an original subpixel dataset can be adjusted according to the gain factor, enabling power consumption to be correspondingly limited at the time when an image is displayed to meet a high brightness requirement.

Method of displaying image for organic light-emitting diode display device comparing total current of the subpixels with a total current threshold

The present disclosure provides a pixel circuit, a pixel circuit driving method, and a display device. The display device can sense and store an original threshold voltage of a driving transistor in the turn-on stage by designing a pixel structure and detecting time sequence. An accrual threshold voltage of the driving transistor is read in an next turn-on stage according to a detected result in order to perform an internal compensation in real-time, and in order to sense and store a mobility of the driving transistor. As a result, unevenness of display can be improved.

Pixel circuit for compensating threshold voltage of driving transistor and driving method

A pixel driving circuit and a display panel are provided. The pixel driving circuit adopts a pixel driving circuit with a 4T1C structure to effectively compensate a threshold voltage of a driving transistor in each pixel. A compensation structure of the pixel driving circuit is simpler and easier to operate. By compensating the threshold voltage of the driving transistor through two compensation phases, it can achieve a wider compensation range of the threshold voltage, thereby improving brightness and a lifespan of the display panel.

Pixel driving circuit and display panel

An AMOLED display device and driving method thereof is provided. In the AMOLED display device, the anode layer on the pixel area comprises a first anode and a second anode formed around and separated from the first anode, the first sub OLED is composed of the first anode, the OLED functional layer and the cathode on the first anode, and the second sub OLED is composed of the second anode, the OLED functional layer and the cathode on the second anode; for each pixel area, a pixel driving circuit is formed correspondingly; the pixel driving circuit is coupled to the first and the second anode; when operated, the pixel driving circuit sends the first current and the second current different from the first current to the first anode and the second anode so that the luminance strength of the first sub OLED and the second sub OLED is the same.

Amoled display device and driving method thereof

An AMOLED display panel includes data lines, scanning lines, a plurality of pixel units surrounded by the data lines and the scanning lines, a plurality of first driving circuits correspondingly arranged in pixel units arranged on predetermined positions, a plurality of second driving circuits arranged in the pixel units on another positions, and a temperature adjustment circuit. An input terminal of the temperature adjustment circuit is connected to the first pixel driving circuits, and an output terminal of the temperature adjustment circuit is connected to the data lines.

AMOLED display panel with function of temperature compensation and display device thereof

Provided is an AMOLED scan driving circuit and method as well as a liquid crystal display panel and device. The circuit comprises shift register units and logical units. Selectors are arranged between adjacent shift register units and between adjacent logical units, and different scan driving signals are output when the selectors are controlled by selection control signals, the shift register units are controlled by clock signals and start pulse signals, and the logical units are controlled by logic control signals.

AMOLED scan driving circuit and method, liquid crystal display panel and device

The present disclosure provides an OLED display device. The detection chip of the OLED display device includes a first and a second internal wirings spaced apart from each other, a plurality of first connection points and a third connection point between two ends of the first internal wiring are provided on the first internal wiring, a plurality of second connection points and a fourth connection point between two ends of the second internal wiring are provided on the second internal wiring. A reference voltage inputs toward the first and the second internal wirings via the third and the fourth connection points, further via the first and the second connection points to the plurality of sensing lines, finally inputs to the OLED panel. This can effectively reduce voltage variation of the reference voltage inputted to the sensing line through the detection chip, and make the detection chip has a smaller size.

OLED display device

This invention provides an AMOLED display device. The OLED panel comprises a plurality of subpixels. Each row of subpixels is electrically connected with one of the rows of OVSS. At least one of the subpixels located in a central area of the substrate is a detecting subpixel. While driving, a maximum value of the negative voltage of the detecting pixel is detected by the detection module, and the corresponding minimum positive voltage is obtained from the look-up table stored in the storage module according to the highest grayscale value and or the highest data signal voltage, and the maximum value of the negative voltage. Then a corresponding positive voltage to the OLED panel is generated from the voltage output module which is controlled by the control signal. This invention provides a driving method of AMOLED display device with low power consumption and high display quality.

AMOLED display device and driving method thereof

The disclosure discloses an AMOLED driving circuit and a display device. The driving circuit includes a pixel circuit, a digital driving circuit, and a detection circuit. The pixel circuit includes a data cable and a first switch element. The data cable and the first switch element are coupled. The digital driving circuit is coupled with the data cable, configured to provide a digital voltage signal to the pixel circuit by the data cable. The detection circuit is coupled with the data cable, configured to receive and output the current fed back from the data cable and flowing through the first switch element. The current is configured to compensate a threshold voltage of the first switch element. According to the manner above, embodiments provided by the disclosure can enhance the display effect of the AMOLED.

AMOLED driving circuit and AMOLED display device

A temperature compensation circuit and method for a display panel and a display panel are provided. The display panel includes a control circuit, a driving circuit, a detection circuit and a pixel circuit; wherein the detection circuit is configured to obtain a current threshold voltage of a transistor of the pixel circuit, the control circuit obtains a current voltage difference between the current threshold voltage and an initial threshold voltage, obtains a current compensation gain matching the current voltage difference according to a predetermined related data of a voltage difference and a compensation gain, and controls the driving circuit to drive the pixel circuit by using the current compensation gain. By practice of the disclosure, the temperature compensation for a display panel could be achieved without the additional temperature sensor, so the service life of the display panel could be extended.

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Shenzhen, China

Zhenling Wang