Pixel circuit and driving method thereof

A technology of a pixel circuit and a driving method, applied in the display field, can solve the problems of poor user experience, afterimage display panel, and reduced display effect, etc.

Active Publication Date: 2020-11-03
BLACK COW FOOD
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  • Claims
  • Application Information

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Problems solved by technology

However, in the prior art, when the display screen is switched, there is a phenomenon of image st

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  • Pixel circuit and driving method thereof
  • Pixel circuit and driving method thereof
  • Pixel circuit and driving method thereof

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Embodiment Construction

[0048] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

[0049] As mentioned in the background technology, when the existing display panel switches the display screen, the screen of the previous display frame will not disappear immediately, and its visual effect will appear at the same time as the screen of the next display frame. The reason for the shadow phenomenon is related to the hysteresis effect of the driving transistor in the pixel circuit. Due to the hysteresis effect of the driving transistor, the display panels displaying different display gray scales have d...

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Abstract

The embodiment of the invention discloses a pixel circuit and a driving method thereof. The driving method comprises the following steps: acquiring gray scale data of a pixel circuit in two adjacent display frames, wherein the gray scale data comprises a display gray scale and a corresponding data voltage; calculating a data voltage corresponding to the black insertion gray scale according to thegray scale data corresponding to at least the previous display frame in the two adjacent display frames; in a black insertion stage between two adjacent display frames, writing a data voltage corresponding to a black insertion gray scale into a grid electrode of a driving transistor of the pixel circuit, writing a first power supply voltage into a first electrode of the driving transistor, and providing a turn-off control signal for a light emitting control module in the pixel circuit. According to the technical scheme provided by the embodiment of the invention, the bias voltage is applied tothe driving transistor after the previous display frame in the two adjacent display frames is displayed, so the hysteresis of the driving transistor is reset, and the hysteresis effect caused by thechange of the data voltage of the grid electrode of the driving transistor during switching of different gray-scale pictures is reduced; therefore, the ghosting problem is improved.

Description

technical field [0001] Embodiments of the present invention relate to the field of display technology, and in particular to a pixel circuit and a driving method thereof. Background technique [0002] With the continuous development of display technology, organic light emitting diode (Organic Light Emitting Diode, OLED) display panels are widely used in the field of optoelectronic display due to their excellent characteristics such as self-illumination, high brightness, and wide viewing angle. [0003] A display panel usually includes a plurality of pixel circuits, wherein the pixel circuits include driving transistors that generate driving signals to drive light-emitting elements to emit light for display. However, in the prior art, when the display screen is switched, there is an afterimage phenomenon on the display panel, which reduces the display effect, and further causes a poor user experience effect. Contents of the invention [0004] Embodiments of the present inve...

Claims

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Application Information

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IPC IPC(8): G09G3/3208
CPCG09G3/3208G09G2320/0257
Inventor 马建东肖一鸣
Owner BLACK COW FOOD
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