Pixel drive circuit and method and light-emitting display device
A pixel driving circuit and pixel technology, applied in the field of pixel driving circuits and light-emitting displays, can solve the problems of threshold voltage drift variation, influence on display quality, influence on display characteristics of light-emitting displays, etc., achieve uniform and stable brightness, maintain brightness, and improve display quality. Effect
Active Publication Date: 2013-09-11
E INK HLDG INC
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Problems solved by technology
[0004] Under the application environment of modern manufacturing technology and light-emitting display, for each driving transistor belonging to different pixels in the same display, the threshold voltage will drift and vary with the increase of working time, resulting in the luminous brightness of the light-emitting display. Uneven, affecting display quality
In addition, for each light-emitting diode in each pixel, its threshold voltage will also drift and vary with aging, which will also affect the display characteristics of the light-emitting display
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[0031] In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation methods of the pixel driving circuit, pixel driving method and light-emitting display proposed according to the present invention will be described below in conjunction with the accompanying drawings and preferred embodiments. , method, step, structure, feature and effect, detailed description is as follows.
[0032] The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of preferred embodiments with reference to the accompanying drawings. Through the description of specific embodiments, one can gain a deeper and more specific understanding of the technical means and effects of the present invention to achieve the intended purpose. However, the accompanying drawings are only for reference and description, and...
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The invention relates to a pixel drive circuit, a pixel drive method and a light-emitting display device, wherein the threshold voltage shifts of transistors and a light-emitting diode can be properly compensated for each pixel in the light-emitting display device, so that the display quality of the light-emitting display device can be enhanced. The pixel drive circuit provided by the invention is internally provided with a capacitor and transistors from the first one to the fifth one so as to drive the light-emitting diode. The third transistor forms a diode connection state so as to store threshold voltage information of the transistors and the light-emitting diode into the capacitor in a data write-in period. When in a light emitting period, the second transistor can compensate the threshold voltage variation of the transistors and the light-emitting diode according to the information in the capacitor so as to supply stable drive current to drive the light-emitting diode.
Description
technical field [0001] The present invention relates to a pixel driving circuit and a pixel driving method of a light-emitting display and a structure of a light-emitting display, in particular to a pixel driving circuit capable of compensating variation in threshold voltages of driving transistors and light-emitting diodes in each pixel, a pixel driving method and a light-emitting display. monitor. Background technique [0002] Displays are one of the most important human-machine interfaces in modern electronic systems. A light-emitting display in which pixels are constructed with light-emitting diodes (especially organic light-emitting diodes) is one of the mainstream developments of modern displays / display panels. [0003] Light-emitting displays can be broadly classified into passive light-emitting displays and active light-emitting displays. Compared with the two, the characteristics of the active light-emitting displays are better. In each pixel of an active light-em...
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IPC IPC(8): G09G3/32G09G3/3258G09G3/3266
Inventor 黄松辉辛哲宏蓝纬洲林钦雯
Owner E INK HLDG INC