P‐17: High‐Uniformity 2T1C AMOLED Panels by Using a New Built‐In Trimming Method

Abstract— Active‐matrix OLEDs are thinner and potentially more energy efficient than AMLCDs; however, most current AMOLED pixel designs are also excessively complicated. This paper compares the operating principles and performance of the four basic types of OLED pixels: converter pixels, system compensation pixels, compensated pixels, and current‐mode pixels. A new current‐mode pixel is described that is fast, provides excellent compensation for processing variations, and yet retains the simplicity and manufacturing advantages of the simplest 2‐transistor OLED pixels. Like other current‐mode pixels, this sequential current mirror pixel provides excellent compensation for variations in TFT Vt, TFT mobility, and non‐uniformities in the OLED itself. However, unlike other current‐mode pixels that are too slow for use in large displays, this sequential current mirror pixel can operate with a voltage precharge in a superlinear mode to reduce data line settling delays to less than 3 μsec. Like the simplest uncompensated pixels, the compensated sequential current mirror pixel requires only two TFTs, a single data line, and a single select line.

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P‐17: High‐Uniformity 2T1C AMOLED Panels by Using a New Built‐In Trimming Method

Cited by 2 publications

References 0 publications

53.1: Invited Paper: Active Matrix OLED Pixel Design

53.1: Invited Paper: Active Matrix OLED Pixel Design

A fast 2‐transistor current‐mode AMOLED pixel

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