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Driving method for display panel, and display device

A technology of display panel and driving method, which is applied to static indicators, instruments, etc., and can solve problems such as large driving voltage

Active Publication Date: 2018-11-06
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention at least partly solves the problem of excessive driving voltage required by the driving transistor in the existing display panel, and provides a method for driving the display panel and a display device

Method used

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  • Driving method for display panel, and display device
  • Driving method for display panel, and display device
  • Driving method for display panel, and display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This embodiment provides a driving method of a display panel.

[0045] The display panel includes a plurality of pixel circuits distributed in an array, figure 1 The circuit diagram of only one of the pixel circuits is shown in . Each pixel circuit includes: a first switch unit 1, a drive transistor T2, a storage unit 3, and a light emitting unit 4; wherein, the first switch units 1 in the pixel circuits of the same column are all connected to the same data line D, and the first The switch unit 1 is used to control the on-off between the first node A and the corresponding data line D, and the first switch unit 1 of the pixel circuit in the same row is controlled by the same first control line G1; the first pole of the driving transistor T2 Connect the first power supply ELVDD, the second pole is connected to the second node S, and the control pole is connected to the first node A; the storage unit 3 is connected between the first node A and the second node S; the light...

Embodiment 2

[0084] This embodiment provides a display device to implement the display method of the foregoing embodiments. see Figure 4 As shown, the display device includes the above-mentioned display panel and a driving circuit for driving the display panel. The driving circuit includes a data line driving unit 101 and a compensation unit 102 .

[0085] The data line driving unit 101 is used to output the driving voltage VA[i] to the data line D corresponding to each pixel circuit in the row during the data writing phase of each row of pixel circuits, where VA[i]=Vdata[i]+ Vth[i]-VS, where Vdata[i] is the original data voltage of the i-th pixel circuit, i is a positive integer, Vth[i] is the threshold voltage of the drive transistor T2 of the i-th pixel circuit, and any drive transistor The threshold voltages of T2 are all positive, and VS is the compensation voltage. The compensation unit 102 is configured to output a compensation voltage VS to each second node S of each pixel circ...

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Abstract

The invention provides a driving method for a display panel and a display device and belongs to the technical field of display. The driving method can at least partially solve the problem that the data line driving capability of a peripheral driving circuit is highly required in the prior art. The driving method of the present invention includes a writing step of in a data writing stage of pixel circuits in each row, outputting a driving voltage VA[i] to data lines corresponding to respective pixel circuits in the row, and outputting a compensation voltage VS to respective second nodes of respective pixel circuits in the row, wherein VA[i]=Vdata[i]+Vth[i]-VS, Vdata[i] is the original data voltage of the ith pixel circuit, i is a positive integer, Vth[i] is the threshold voltage of the driving transistor of the ith pixel circuit, the threshold voltage of any driving transistor is a positive value, the range of the compensation voltage VS is [-Vth_min, 0), and Vth_min is the threshold voltage minimum value of the driving transistors in respective pixel circuits. The driving method can be used for display.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to a driving method of a display panel and a display device. Background technique [0002] A type of existing display panel, such as an organic light emitting diode (OLED) display panel, includes a plurality of pixel circuits distributed in an array. Each pixel circuit includes a driving transistor, and the source and drain of the driving transistor are connected in series with a light emitting unit (such as an organic light emitting diode) between the first power supply and the second power supply. Each pixel circuit further includes a storage unit, such as a capacitor, and the two ends of the capacitor are respectively connected between the gate and the source of the driving transistor. After writing a driving voltage to the gate of the driving transistor through the data line, the connection between the data line and the gate of the driving transistor is cut off, an...

Claims

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Application Information

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IPC IPC(8): G09G3/3291
CPCG09G3/3291G09G3/3233G09G2320/0233G09G2320/0295G09G2320/045G09G2300/0842
Inventor 鲍文超何敏曹春
Owner BOE TECH GRP CO LTD