Driving circuit and repairing method for repairing normally-on OLED pixel, and display device

A technology for driving circuits and repairing methods, applied in static indicators, instruments, etc., can solve the problems of difficulty in repairing always-on OLED pixels, and achieve the effect of quickly repairing always-on defects

Inactive Publication Date: 2021-03-16
深圳市智联汇网络系统企业(有限合伙)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a driving circuit, a repair method, and a display device for repairing norm...

Method used

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  • Driving circuit and repairing method for repairing normally-on OLED pixel, and display device
  • Driving circuit and repairing method for repairing normally-on OLED pixel, and display device
  • Driving circuit and repairing method for repairing normally-on OLED pixel, and display device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] refer to figure 1 As shown, a driving circuit for repairing normally bright OLED pixels includes: a first driving module 11 , a second driving module 12 , a light emitting module 13 , and a fuse module 14 .

[0036] The light emitting module 13 in the present invention includes an OLED pixel light emitting unit 105, wherein the OLED pixel light emitting unit 105 includes an OLED pixel including at least three color sub-pixels. The first driving module 11 is connected with the light-emitting module 13, and provides a driving signal to drive the OLED pixel light-emitting unit 105, and the fuse module 14 is connected between the first driving module 11 and the anode of the light-emitting module 13; the second driving module 12 It is connected between the fuse module 14 and the anode of the light emitting module 13 ; wherein, the second driving module 12 provides a bias current so that the fuse module 14 is fused. The first driving module 11 in the present invention includ...

Embodiment 2

[0049] refer to Figure 7 As shown, the present invention also provides a repairing method for repairing always bright OLED pixels, comprising the following steps:

[0050] S01, reducing the driving current of the light emitting module through the first driving module until it is lower than the excitation threshold of the light emitting module;

[0051] S02, according to the light-on or off state of the light-emitting module, judge whether the light-emitting module is a constant-light OLED pixel; if not, end; otherwise, go to the next step;

[0052] S03, providing a bias current to the fuse module through the second drive module, and when the current of the fuse module is greater than the threshold value of the fuse current, the fuse module is instantly fused, so that the path between the first drive module and the light emitting module is disconnected, so The above-mentioned always-on OLED pixel goes out, and the restoration is completed.

[0053] The bias current in the pr...

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Abstract

The invention relates to a driving circuit and method for repairing normally-on OLED pixels and a display device. The circuit comprises a first driving module, a second driving module, a light emitting module and a fusing module. The light-emitting module comprises an OLED pixel light-emitting unit. The first driving module is connected with the light emitting module and provides a driving signal;the fusing module is connected between the first driving module and the anode of the light emitting module; the second driving module is connected between the fusing module and the anode of the lightemitting module, wherein the second driving module is used for providing bias current, so that the fusing module is fused. The beneficial effects are that laser burning is not needed, and the fusingelement and the bias circuit are additionally arranged in the drive circuit so that the normally-on defect can be rapidly repaired.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a drive circuit for repairing a normally bright OLED pixel, a repair method, and a display device. Background technique [0002] Organic Light Emitting Diode (OLED) has the advantages of self-illumination, high contrast, wide color gamut, simple manufacturing process, and easy formation of flexible structure. Therefore, the display technology using organic light emitting diode has become a kind of important display technology. The pixels of OLED display devices have an excitation threshold. Above this threshold, the OLED pixels are fired to start emitting light. A properly functioning OLED will stop emitting light when the excitation current drops below the threshold. However, during the fabrication of OLED devices, failure or contamination may cause one or more OLED pixels to fail to function properly, and a small number of sub-pixels remain on regardless of the driving cond...

Claims

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Application Information

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IPC IPC(8): G09G3/3208
CPCG09G3/3208
Inventor 孙浩李牧词茆胜
Owner 深圳市智联汇网络系统企业(有限合伙)
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