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Pixel circuit, driving method thereof and display device

A pixel circuit and circuit technology, applied in static indicators, instruments, etc., can solve the problems of poor stability of micro-light-emitting diodes, reduce the display effect of the display panel, and cannot control the brightness and gray scale of micro-light-emitting diodes, so as to improve the display effect Effect

Active Publication Date: 2021-06-22
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the pixel circuit provided by the related art, the brightness and grayscale of the micro-light emitting diode cannot be accurately and effectively controlled, and the stability of the micro-light-emitting diode is poor, thereby greatly reducing the display effect of the display panel.

Method used

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  • Pixel circuit, driving method thereof and display device
  • Pixel circuit, driving method thereof and display device
  • Pixel circuit, driving method thereof and display device

Examples

Experimental program
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Effect test

Embodiment 1

[0048] An embodiment of the present invention provides a pixel circuit, which is used for controlling the conduction duration of a current path between a first voltage terminal and a second voltage terminal. When the current path is turned on, the first voltage output from the first voltage terminal and the second voltage output from the second voltage terminal can provide a potential difference to the current path.

[0049] In this embodiment, the first voltage output from the first voltage terminal VDD may be a constant high level, and the second voltage output from the second voltage terminal VSS may be a constant low level.

[0050] figure 1 A schematic structural diagram of a pixel circuit provided for an embodiment of the present invention, such as figure 1 As shown, the pixel circuit includes: a first charging subcircuit, a second charging subcircuit, a first storage subcircuit, a first switching subcircuit, a second switching subcircuit and a light emitting subcircuit...

Embodiment 2

[0091] Based on the inventive concept of the above-mentioned embodiments, some embodiments of the present invention further provide a driving method for a pixel circuit, which is applied to the pixel circuit provided in the first embodiment above. In one image frame, the pixel circuit has multiple scanning periods.

[0092] In a scanning period (such as the first scanning period), the driving method of the pixel circuit, such as Figure 8 As shown, steps 100-101 are included.

[0093] Step 100, providing the first voltage to the first voltage terminal, providing the scanning signal to the scanning signal terminal, providing the first data voltage to the first data signal terminal, and writing the first data voltage to the first node through the first charging sub-circuit, The second charging sub-circuit compensates the second node under the control of the scanning signal terminal;

[0094] Specifically, when the second charging sub-circuit compensates the second node under th...

Embodiment 3

[0099] An embodiment of the present invention provides a pixel circuit, Figure 9 It is a structural schematic diagram of the third embodiment of the pixel circuit of the present application. This embodiment is an extension of the aforementioned first embodiment. The main structure is basically the same as that of the aforementioned first embodiment. The difference is that the first embodiment of this embodiment The switch sub-circuit is respectively connected to the third voltage terminal Vref, the second node N2 and the third node N3, and is used to provide the signal of the third voltage terminal Vref to the third node N3 under the control of the second node N2. For example, the control terminal of the first switch subcircuit is connected to the second node N2, the first terminal of the first switch subcircuit is connected to the third voltage terminal Vref, and the second terminal of the first switch subcircuit is connected to the third node N3. The pixel circuit in this e...

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Abstract

The embodiment of the invention discloses a pixel circuit, a driving method of the pixel circuit and a display device. The pixel circuit comprises a first charging sub-circuit, a second charging sub-circuit, a first storage sub-circuit, a first switch sub-circuit, a second switch sub-circuit and a light emitting sub-circuit; the first charging sub-circuit is used for charging the light emitting sub-circuit under the control of a scanning signal end, and after the signal of the first data signal end is provided, under the control of the light-emitting control end, providing a signal of amplitude periodic change of a second data signal end for the first node. According to the embodiment of the invention, the signal of the second data signal end is set to be the signal of which the amplitude is periodically changed, the first switch sub-circuit is periodically controlled to be switched on or switched off, and the light-emitting duration of the light-emitting element in the light-emitting sub-circuit is correspondingly controlled, so that the effective light-emitting brightness of the light-emitting element can be controlled, and the purpose of adjusting the display gray scale is achieved.

Description

technical field [0001] Embodiments of the present invention relate to but are not limited to the field of display technologies, and in particular, relate to a pixel circuit, a driving method thereof, and a display device. Background technique [0002] Micro Light Emitting Diode (Micro Light Emitting Diode, Micro LED) technology is to realize the thinning, miniaturization and matrixing of light-emitting diodes by high-density integration of micro-sized light-emitting diode arrays on a chip, and the distance between pixels can be It reaches the micron level, and each pixel can be addressed and emit light individually. Due to its low driving voltage, long lifespan, and wide temperature resistance, micro-light-emitting diode display panels are gradually developing into display panels used in consumer terminals. [0003] In the related art, the pixel circuit is electrically connected with the micro light emitting diode to drive the micro light emitting diode to emit light. Howe...

Claims

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Application Information

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IPC IPC(8): G09G3/32
CPCG09G3/32G09G3/3233G09G2300/0426G09G2300/0814G09G2300/0819G09G2300/043G09G2300/0852G09G2300/0861G09G2310/066G09G2310/0267G09G2310/0275
Inventor 玄明花陈小川岳晗丛宁刘冬妮齐琪刘静
Owner BOE TECH GRP CO LTD
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