Method and device for correcting color shift of organic light-emitting diode (OLED) display panel, and display device

Patent metadata

Field	Value
Publication number	US-9578719-B2
Application number	US-201514894453-A
Country	US
Kind code	B2
Filing date	Jul 16, 2015
Priority date	Jan 15, 2015
Publication date	Feb 21, 2017
Grant date	Feb 21, 2017

Abstract

A method and device for correcting a color shift of an OLED display panel, and a display device are disclosed. The method includes: performing an ageing treatment on the monochromatic luminescent devices in the OLED display panel; performing a luminescent lifetime attenuation test on the monochromatic luminescent devices after the ageing treatment respectively, and obtaining corresponding luminescent lifetime attenuation rates of the monochromatic luminescent devices; and performing an ageing treatment on the monochromatic luminescent device with rapidest luminescent lifetime attenuation rate again when differences between the luminescent lifetime attenuation rates of the monochromatic luminescent devices are greater than a preset threshold, until differences between the luminescent lifetime attenuation rates of the monochromatic luminescent devices are less than the preset threshold. The method effectively corrects the color shift phenomenon of display images of an OLED display product after long-term use.

First claim

What is claimed is:

1. A method for correcting a color shift of an organic light-emitting diode (OLED) display panel, comprising:
performing an ageing treatment on monochromatic luminescent devices in the OLED display panel;
performing a luminescent lifetime attenuation test on the monochromatic luminescent devices after the ageing treatment respectively, and obtaining corresponding luminescent lifetime attenuation rates of the monochromatic luminescent devices; and
performing an ageing treatment on the monochromatic luminescent device with rapidest luminescent lifetime attenuation rate again when differences between the luminescent lifetime attenuation rates of the monochromatic luminescent devices are greater than a preset threshold, until differences between the luminescent lifetime attenuation rates of the monochromatic luminescent devices are less than the preset threshold.

2. The method according to claim 1 , wherein performing of the ageing treatment on the monochromatic luminescent devices in the OLED display panel includes:
inputting a different preset voltage into the monochromatic luminescent devices in the OLED display panel respectively, and allowing the monochromatic luminescent devices to emit light for a preset duration and subsequently cooled to room temperature, in which
the preset voltage is determined by a material of an emitting layer of the monochromatic luminescent devices.

3. The method according to claim 2 , wherein in the process of performing the ageing treatment by inputting a preset voltage into the monochromatic luminescent devices in the OLED display panel, the preset durations of light emitting of the monochromatic luminescent devices are the same.

4. An organic light-emitting diode (OLED) display device, comprising the OLED display panel processed by the method according to claim 2 .

5. The method according to claim 2 , wherein performing of the luminescent lifetime attenuation test on the monochromatic luminescent devices after the ageing treatment respectively includes:
inputting a voltage for the luminescent lifetime attenuation test into the monochromatic luminescent devices after the ageing treatment respectively, allowing the monochromatic luminescent devices to emit light for a preset duration, and obtaining a corresponding luminescent lifetime attenuation curve of the monochromatic luminescent devices.

6. The method according to claim 5 , wherein in the process of performing the ageing treatment by inputting a preset voltage into the monochromatic luminescent devices in the OLED display panel, the preset durations of light emitting of the monochromatic luminescent devices are the same.

7. The method according to claim 5 , wherein the preset voltage inputted in the process of performing the ageing treatment on the monochromatic luminescent devices in the OLED display panel is greater than the voltage inputted in the process of performing the luminescent lifetime attenuation test on the monochromatic luminescent devices after the ageing treatment.

8. The method according to claim 7 , wherein a difference between a cathode voltage and an anode voltage loaded to the monochromatic luminescent devices in the process of performing the ageing treatment on the monochromatic luminescent devices in the OLED display panel is greater than a difference between a cathode voltage and an anode voltage loaded to the monochromatic luminescent devices in the process of performing the luminescent lifetime attenuation test on the monochromatic luminescent devices after the ageing treatment.

9. The method according to claim 8 , wherein in the process of performing the ageing treatment on the monochromatic luminescent devices in the OLED display panel, the cathode voltages loaded to the monochromatic luminescent devices are the same and the anode voltages loaded to the monochromatic luminescent devices are the same.

10. An organic light-emitting diode (OLED) display device, comprising the OLED display panel processed by the method according to claim 1 .

11. The method according to claim 1 , wherein performing of the luminescent lifetime attenuation test on the monochromatic luminescent devices after the ageing treatment respectively includes:
inputting a voltage for the luminescent lifetime attenuation test into the monochromatic luminescent devices after the ageing treatment respectively, allowing the monochromatic luminescent devices to emit light for a preset duration, and obtaining a corresponding luminescent lifetime attenuation curve of the monochromatic luminescent devices.

12. A device for correcting a color shift of an organic light-emitting diode (OLED) display panel, comprising: an ageing treatment unit, a test unit and a processing unit, in which
the ageing treatment unit is configured to perform an ageing treats treatment on the monochromatic luminescent devices in the OLED display panel;
the test unit is configured to perform a luminescent lifetime attenuation test on monochromatic luminescent devices after the ageing treatment, and obtain corresponding luminescent lifetime attenuation rates of the monochromatic luminescent devices; and
the processing unit is configured to perform an ageing treatment on the monochromatic luminescent device with rapidest luminescent lifetime attenuation rate again when differences between the luminescent lifetime attenuation rates of the monochromatic luminescent devices are greater than a preset threshold, until the differences between the luminescent lifetime attenuation rates of the monochromatic luminescent devices are less than the preset threshold.

13. The device according to claim 12 , wherein the ageing treatment unit is configured to input a different preset voltage into the monochromatic luminescent devices in the OLED display panel respectively, and allow the monochromatic luminescent devices to emit light for a preset duration and subsequently cooled to room temperature, in which the preset voltage is determined by a material of an emitting layer of the monochromatic luminescent devices.

14. The device according to claim 13 , wherein the ageing treatment unit is configured as: in the process of performing the ageing treatment by inputting the preset voltages into the monochromatic luminescent devices in the OLED display panel, the preset durations of light emitting of all the monochromatic luminescent devices are the same.

15. The device according to claim 13 , wherein the test unit is configured to input a voltage for the luminescent lifetime attenuation test into the monochromatic luminescent devices after the ageing treatment respectively, allow the monochromatic luminescent devices to emit light for a preset duration, and obtain a corresponding luminescent lifetime attenuation curve of the monochromatic luminescent devices.

16. The device according to claim 15 , wherein the ageing treatment unit is configured as: in the process of performing the ageing treatment by inputting the preset voltages into the monochromatic luminescent devices hi the OLEO display panel, the preset durations of light emitting of all the monochromatic luminescent devices are the same.

17. The device according to claim 15 , wherein the ageing treatment unit is configured as: the preset voltage inputted in the process of performing the ageing treatment on the monochromatic luminescent devices in the OLED display panel is greater than the voltage inputted in the process of performing the luminescent lifetime attenuation test on the monochromatic luminescent devices after the ageing treatment.

18. The device acco

Assignees

• Boe Technology Group Co Ltd
• Ordos Yuansheng Optoelectronics Co Ltd

Inventors

• Han Yuebai
• Lai Weilin
• Jin Xinxin
• Xuan Minghua

Classifications

• G09G3/3208

  organic, e.g. using organic light-emitting diodes [OLED] · CPC title

• H05B33/10 Primary

  Apparatus or processes specially adapted to the manufacture of electroluminescent light sources · CPC title

• G09G2320/045

  Compensation of drifts in the characteristics of light emitting or modulating elements · CPC title

• G09G2360/145

  the light originating from the display screen · CPC title

• G09G2320/0242

  Compensation of deficiencies in the appearance of colours · CPC title