A pixel compensation circuit, its driving method and display device
A technology for compensating circuits and pixels, used in static indicators, instruments, etc., to solve problems such as uneven display brightness, inability to drive transistors, and affecting image display effects.
Active Publication Date: 2020-02-18
BOE TECH GRP CO LTD +1
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Problems solved by technology
[0003] In the existing pixel compensation circuit, when the driving transistor drives the light-emitting device to emit light, the luminance of the light-emitting device is very sensitive to the change of its driving current, and the driving transistor cannot be completely consistent during the manufacturing process, and due to process deviation and work Due to temperature changes in the process and other reasons, there will be non-uniformity in the threshold voltage of the driving transistor in each pixel compensation circuit, which will cause the current flowing through the light-emitting device in each pixel to change, resulting in uneven display brightness, thus Affects the display of the entire image
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[0038] The specific implementations of the pixel compensation circuit provided by the embodiments of the present invention, its driving method and the display device will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments described in this specification are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0039] A pixel compensation circuit provided by an embodiment of the present invention, such as Figure 1a and Figure 1bAs shown, it includes: a reset module 101, an initialization module 102, a data writing module 103, a compensation module 104, a lighting control module 105, a driving module 106 and a light emitting device EL;
[0040] The control terminal of the reset module 10...
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The invention discloses a pixel compensation circuit as well as a driving method and a display device thereof. The pixel compensation circuit comprises a reset module, an initialization module, a data writing module, a compensation module, a light-emitting control module, a driving module and a light-emitting device. According to the pixel compensation circuit provided by the embodiment of the invention, by compensating a threshold voltage to the driving module by virtue of the compensation module, a working current supplied to the light-emitting control module is no longer influenced by the threshold voltage of the driving module when the driving module is used for driving the light-emitting control module to emit light after the threshold voltage is compensated, so that the problem that the current running through the light-emitting device is instable due to the threshold voltage is solved, the uniformity of the luminance of the light-emitting device is improved, and therefore, the quality of a display frame is guaranteed.
Description
technical field [0001] The invention relates to the field of display technology, in particular to a pixel compensation circuit, a driving method thereof and a display device. Background technique [0002] Organic Light Emitting Diode (OLED) is one of the hotspots in the field of flat panel display research today. Compared with Liquid Crystal Display (LCD), OLED display has low energy consumption, low production cost, self-luminescence, With the advantages of wide viewing angle and fast response speed, OLED displays have begun to replace traditional LCD displays in display fields such as mobile phones and digital cameras. Among them, the pixel compensation circuit design for controlling the light emission of the light-emitting device is the core technical content of the OLED display, which has important research significance. [0003] In the existing pixel compensation circuit, when the driving transistor drives the light-emitting device to emit light, the luminance of the l...
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IPC IPC(8): G09G3/3208
CPCG09G3/3208G09G2320/0626
Inventor 李祥远高玟虎姜尚勳高永益董婉俐
Owner BOE TECH GRP CO LTD