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Pixel circuit, driving method of pixel circuit, display panel, and display device

A technology of a pixel circuit and a driving method, which is applied in the display field, can solve problems such as poor image layering and affect the improvement of display panel display quality, and achieve the effect of reducing difficulty, fine and low gray-scale driving current, and improving image layering

Active Publication Date: 2021-07-23
SHANGHAI AVIC OPTOELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing display panels have the problem of poor image layering at low gray levels, which affects the improvement of the display quality of the display panels.

Method used

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  • Pixel circuit, driving method of pixel circuit, display panel, and display device
  • Pixel circuit, driving method of pixel circuit, display panel, and display device
  • Pixel circuit, driving method of pixel circuit, display panel, and display device

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Embodiment Construction

[0026] 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.

[0027] As mentioned in the background technology, the existing display panels have the problem of poor image layering at low gray scales. The inventors have found through research that the reason for this problem is that the existing pixel circuits affect the light-emitting diodes at low gray scales. It is difficult to control.

[0028] The following uses Micro Light Emitting Diode (micro-LED / μLED) as an example to illustrate, figure 1 A schematic diagram of a curve showing the luminous efficiency of a micro ligh...

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Abstract

The invention discloses a pixel circuit, a driving method of the pixel circuit, a display panel and a display device. The pixel circuit includes a first drive transistor and a second drive transistor connected in series between the first power supply signal input terminal and the first pole of the light emitting diode; used for converting the first data signal to A first switch transistor for transmitting to the gate of the first drive transistor; a second switch transistor for transmitting the second data signal to the gate of the second drive transistor under the control of the enable signal of the second scan signal; The channel width-to-length ratio of the first driving transistor is a, and the channel width-to-length ratio of the second driving transistor is b, wherein a / b≥2. Compared with the prior art, the embodiment of the present invention improves the image layering of the display panel at low grayscale, expands the brightness range of the light-emitting diodes, and improves the display quality of the display panel.

Description

technical field [0001] Embodiments of the present invention relate to display technologies, and in particular to a pixel circuit, a driving method for the pixel circuit, a display panel, and a display device. Background technique [0002] With the continuous development of display technology, the application range of display panels is becoming wider and wider, and people's requirements for display panels are also getting higher and higher. In particular, the display quality of a display panel has always been one of the important indicators for consumers and panel manufacturers to measure the quality of a display panel. However, the existing display panels have the problem of poor image layering at low gray levels, which affects the improvement of the display quality of the display panels. Contents of the invention [0003] The present invention provides a pixel circuit, a driving method of the pixel circuit, a display panel and a display device, so as to improve the image...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/32
CPCG09G3/32
Inventor 吴天一
Owner SHANGHAI AVIC OPTOELECTRONICS
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