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System and methods for aging compensation in AMOLED displays

A display system and display technology, applied in the direction of static indicators, instruments, lamps and lanterns testing, etc., can solve the problem of not considering the actual physical characteristics of pixels

Inactive Publication Date: 2012-10-10
IGNIS INNOVATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, optical inspection fails to detect electrical faults that may not manifest themselves in the pixel's output
Benchmark data for a pixel is based on the characteristics and design parameters of the pixel determined prior to shipment, but this does not take into account the actual physical characteristics of the pixel itself

Method used

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  • System and methods for aging compensation in AMOLED displays
  • System and methods for aging compensation in AMOLED displays
  • System and methods for aging compensation in AMOLED displays

Examples

Experimental program
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Embodiment Construction

[0031] figure 1 Is an electronic display system 100 having an active matrix area or pixel array 102 in which an array of active pixels 104a-d are arranged in a row and column configuration. For ease of illustration, only two rows and two columns are shown. Outside the active matrix area which is the pixel array 102 is a peripheral area 106 in which peripheral circuits for driving and controlling the area of ​​the pixel area 102 are arranged. Peripheral circuitry includes a gate or address driver circuit 108 , a source or data driver circuit 110 , a controller 112 and an optional supply voltage (eg, Vdd) driver 114 . The controller 112 controls the gate driver 108 , the source driver 110 and the supply voltage driver 114 . Gate driver 108 operates address lines or select lines SEL[i], SEL[i+1], etc. under the control of controller 112, there is one address line or line for each row of pixels 104 in pixel array 102 Select the line. In the pixel sharing configuration describe...

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PUM

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Abstract

Methods and systems to provide baseline measurements for aging compensation for a display device are disclosed. An example display system has a plurality of active pixels and a reference pixel. Common input signals are provided to the reference pixel and the plurality of active pixels. The outputs of the reference pixel is measured and compared to the output of the active pixels to determine aging effects. The display system may also be tested applying a first known reference current to a current comparator with a second variable reference current and the output of a device under test such as one of the pixels. The variable reference current is adjusted until the second current and the output of the device under test is equivalent of the first current. The resulting current of the device under test is stored in a look up table for a baseline for aging measurements during the display system operation. The display system may also be tested to determine production flaws by determining anomalies such as short circuits in pixel components such as OLEDs and drive transistors.

Description

[0001] priority claim [0002] This application claims priority to Canadian Application No. 2,688,870, filed November 30,2010. [0003] copyright [0004] Portions of the disclosure of this patent document contain material that is subject to copyright protection. The copyright owner has no objection to the facsimile reproduction by anyone of the patent disclosure as it appears in the Patent and Trademark Office patent file or records, but otherwise reserves all copyright rights whatsoever. technical field [0005] The present invention relates generally to active matrix organic light emitting device (AMOLED) displays, and in particular to determining the aging conditions required to compensate for the pixels of such displays. Background technique [0006] Currently, active matrix organic light emitting device ("AMOLED") displays are being introduced. Advantages of such displays include lower power consumption, manufacturing flexibility, and faster refresh rates compared t...

Claims

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Application Information

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IPC IPC(8): G09G3/22G09G3/32G09G3/3208H05B44/00
CPCG09G2320/045G09G2320/0295G09G2300/0842G09G2320/043G09G3/006G09G2320/029G09G3/3233G09G2320/0285G01R31/44G09G3/3283G09G2320/0233
Inventor G·查吉J·M·迪昂尼A·霍尔马蒂刘彤S·亚历山大
Owner IGNIS INNOVATION
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