Pixel circuit, display substrate and display device, method for driving display substrate
A technology for pixel circuits and display substrates, which is applied in the fields of display substrates and display devices, driving display substrates, and pixel circuits, and can solve problems such as reducing the service life of organic light-emitting elements, and achieve the effect of improving service life
Active Publication Date: 2018-10-23
BOE TECH GRP CO LTD +1
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Problems solved by technology
Generally, the polarity of the current applied by the display drive unit to the organic electroluminescent unit is fixed, causing the organic electroluminescent unit to be unidirectionally biased (forward bias or reverse bias) for a long time, reducing the Lifespan of OLEDs
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[0047] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.
[0048] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.
[0049] On the one hand, the present invention provides a pixel circuit, see figure 1 , the pixel circuit includes: an electroluminescence unit 100, a display drive unit 200 and a bias control unit 3...
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The present invention relates to a pixel circuit, a display substrate, a display device, and a method for driving a display substrate. The pixel circuit provided by the present invention includes a bias control unit, which is connected to a reset control terminal and connected to a first electroluminescence unit. One terminal is adapted to be turned on when a reset control signal is input to the reset control terminal, and the voltage of the first terminal of the electroluminescence unit is set to the voltage of the reset control signal. In this way, by applying a corresponding reverse bias voltage at the reset control terminal, the reverse bias of the electroluminescence unit can be realized; thereby improving the service life of the electroluminescence unit. And because in the present invention, the electroluminescent unit is reverse-biased according to the voltage input by the reset control terminal, so that it is not limited by other voltages (such as the initial voltage), and a reverse voltage with a relatively large absolute value is used. The bias voltage performs a stronger reverse bias on the electroluminescence unit, which better improves the lifespan of the electroluminescence unit.
Description
technical field [0001] The invention relates to the field of display technology, in particular to a pixel circuit, a display substrate, a display device, and a method for driving the display substrate. Background technique [0002] Organic Light Emitting Display (OLED) is one of the hot spots in the field of flat panel display research today. Compared with liquid crystal displays, OLED has the advantages of low energy consumption, low production cost, self-illumination, wide viewing angle and fast response speed. . Currently, OLEDs have begun to replace traditional Liquid Crystal Displays (LCDs) in display fields such as mobile phones, PDAs, and digital cameras. [0003] The core structure for pixel driving in an organic light-emitting display is a pixel circuit, and the pixel circuit includes an organic electroluminescent unit (Organic Light-Emitting Diode, OLED) and a display driving unit for driving the organic electroluminescent unit. The unit is connected to an electr...
Claims
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IPC IPC(8): G09G3/3233G09G3/3258
CPCG09G3/3233G09G3/3258G09G2300/0852G09G2300/0814G09G2300/0819G09G2300/0823G09G2300/0842G09G2300/0861G09G2310/0245G09G2310/08G09G2320/043G09G2330/12H01L27/124H01L27/1255H10K59/131
Inventor 王强刘利宾
Owner BOE TECH GRP CO LTD