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

Other

Tcl China Star Optoelectronics Technology Co., Ltd.

Bobiao Chang

Xiaolong Chen

Yichien Wen

Yi-chien Wen

Ming-Jong Jou

Yi-Chien Wen

A driving method, a driving device and a liquid crystal display device are provided. The driving device of the LCD display device outputs the target grey value of the nth frame according to the original grey value of the nth frame, the original grey value of the (n&#x2212;1)th frame and the look-up table. This improves the luminance of the sub-pixel of the nth frame, shortens the required charging time of the sub-pixel when the (n+1)th frame is being displayed. Thus, the sub-pixel of the (n+1)th frame could be efficiently charged and the luminance of the sub-pixel could be increased. In addition, since the luminance increase of the (n+1)th frame is more than that of the nth frame, the contrast of the LCD display could be improved.

Driving method, driving device and related LCD display device

OLED pixel driving circuit, array substrate and display device are provided. The pixel driving circuit comprises a driving control unit, a first light emitting unit and a second light emitting unit. Two OLEDs share one driving control unit, so the two OLEDs alternately emit light. In this way, light emitting time of the OLEDs is reduced, number of parasitic capacitors and data lines in a panel is reduced, and aperture ratio of the OLED device is increased; and OLEDs are enabled to be in reverse bias in a non-light emitting display frame, so that OLEDs do not have to be in a DC bias state for a long time, and thus, aging of the OLED device is slowed down. No other reverse bias voltage is connected externally, difficulty of tracing of the pixel circuit and crosstalk from a bias voltage line to other signal lines are reduced.

OLED pixel driving circuit, array substrate and display device

The present invention teaches a DC boost circuit and method. The circuit includes an inductor, a diode, a first capacitor, a first FET, a first voltage conversion unit, a voltage drop detection module, a reference voltage adjustment module, and a control module. After a load is connected, the voltage drop detection module obtains a current flowing through the diode and outputs a corresponding second voltage to the reference voltage adjustment module, causing an output voltage from the reference voltage adjustment module greater than an original reference voltage. The control module controls the first FET to increase a ratio of its conduction interval to its cutoff interval in a cycle of conduction and cutoff, thereby increasing the output voltage to compensate the voltage drop resulted from the impedance between the DC boost circuit and the load. The output voltage is therefore ensured to have a stable level.

DC boost circuit and method

The present invention provides a line over driving (LOD) table adjustment method and a system thereof, which divides a display panel into M*N blocks. In an i-th row and a j-th column in the LOD table corresponding to a block, according to a brightness value of a grayscale value of a pixel of a previous line and a current line corresponding to an initial grayscale value of over driving pixels, calculate a target brightness value of an adjustment screen corresponding to a combination of the grayscale value of the pixel of the previous line and the current line corresponding to the initial grayscale value of over driving pixels, and obtain a measured brightness value of the adjustment screen to compare whether the difference between the target brightness value and the measured brightness value is within the default error range value to determine a final grayscale value of over driving pixel.

LOD table adjustment method and LOD table adjustment system

The present disclosure relates to a pixel driving circuit and an organic light-emitting diode (OLED) display having the pixel driving circuit. The pixel driving circuit adopts a 6T2C (six transistors and two capacitors) structure to compensate a threshold voltage of the driving thin film transistor (TFT) in the pixel. As such, a current passing through the OLED may not be related to the threshold voltage of the driving TFT. So as to eliminate the improper image-displaying of the OLED display resulting from the drifting of the threshold voltage of the driving TFT.

Pixel driving circuit and organic light-emitting diode (OLED) display

The present disclosure provides an OLED pixel circuit and a method for retarding the aging of an OLED device. By providing a first sub-pixel driving unit, a second sub-pixel driving unit, a first reverse biasing unit, and a second reverse biasing unit and by simple control timing, a first light emitting diode and a second light emitting diode will not always be in a DC biased state, and the first light emitting diode and the second light emitting diode will emit light alternately in different frames.

OLED pixel circuit and method for retarding aging of OLED device

A power supply device and current equalization method wherein the device includes: a plurality of power modules connected in parallel and a plurality of current equalization modules; two adjacent power modules corresponding to a current equalization module, each power module including: voltage output unit, power stage unit, and control unit; each current equalization module including: first and second current sampling conversion units, and error comparison unit; by using the error comparison unit to compare difference between load currents of two adjacent power modules and generating corresponding first control voltage based on the load currents, and the control unit generating the second control voltage based on the first control voltage to control the power stage unit to change the output voltage according to the second control voltage changing. The device accurately achieves current equalization of power modules connected in parallel and simplifies complexity of power supply device.

Growing community of inventors

Shenzhen, China

Bobiao Chang