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Method and circuit for operating passive matrix type organic light-emitting diode display panel

A technology for light-emitting diodes and display panels, applied in static indicators, electroluminescent light sources, instruments, etc., can solve the problems of inability to reduce power consumption, inability to reduce power consumption of display panels, and inability to improve lifespan, etc., so as not to cause display quality Deterioration, power consumption reduction, and life-span extension effects

Inactive Publication Date: 2008-09-17
RICHTEK TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method results in that the power consumption of the PMOLED display panel cannot be reduced and the life cannot be improved, because the panel 106 is continuously driven and scanned sequentially, so that the power consumption cannot be reduced, and the luminous brightness of the PMOLED is proportional to the driving current, as shown in FIG. 3 , Increasing the driving current and driving cycle within the allowable range can obtain better display quality, but the life of PMOLED is negatively correlated with the product of driving current and usage time, so the life of PMOLED is often sacrificed in order to obtain better display quality. Power consumption cannot be reduced

Method used

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  • Method and circuit for operating passive matrix type organic light-emitting diode display panel
  • Method and circuit for operating passive matrix type organic light-emitting diode display panel
  • Method and circuit for operating passive matrix type organic light-emitting diode display panel

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Embodiment Construction

[0033] As shown in FIG. 4, according to the present invention, a method of operating a passive matrix organic light emitting diode display panel includes using two driver modules, such as a row driver module 402 and a column driver module 404, to drive a PMOLED display panel 406 with a current. 406 contains WL 0 to WL m A total of m columns, each column has n pixels (Cell 0- WL i to Cell n- WL 1 ), when the PMOLED display panel 406 is in some specific states, such as standby state, screen saver, displaying a static picture or a slow-moving picture, select the area 408 in the entire PMOLED panel 406 picture, unlike the panel 406 that scans when it is normally displayed Each column in panel 406 and drive the pixels in each column, only by scanning a specific column of panel 406, such as the column in area 408 (WL j to WL h ), and drive the pixels in each column in the area 408, such as Cell k to Cell 1 , to achieve screen display. At this time, by adjusting the driving c...

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Abstract

Wherein, the method comprises: scanning column, and / or reducing drive current and period to local picture or selected area. This invention can prolongs lifetime of PMOLED (passive matrix-type LED) display.

Description

technical field [0001] The present invention relates to a passive matrix organic light emitting diode (PMOLED) display panel, and more particularly to a method of operating a passive matrix organic light emitting diode display panel. Background technique [0002] Organic light-emitting diode (OLED) displays have many advantages over other flat-panel displays (FPDs), including low power consumption, high brightness, and easy manufacturing, but their service life has not been able to reach the level of other flat-panel displays. Therefore, improving OLED display panels Longevity becomes a major subject. OLED displays can be divided into active matrix organic light emitting diode (AMOLED) display panels and passive matrix organic light emitting diode (PMOLED) display panels according to the structure of their pixel arrays. In US Patent No. 6,023,259, an improved AMOLED life-span is disclosed. However, no method for improving the lifespan of the PMOLED display panel has been pr...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/32H05B33/08G09G3/3216H05B44/00
CPCY02B20/342Y02B20/30
Inventor 林显峰杨世杰杨证咏陈健忠蔡键贤
Owner RICHTEK TECH