This article presents new optical pixel sensors that are based on hydrogenated amorphous silicon thin-film transistors (a-Si:H TFTs) for detecting secondary color optical signals to increase the number of colors of sensed light. Three types of series-connected structure with different photo TFTs enable the sensors to receive secondary color optical input signals that combine any two primary colors, such as magenta (blue and red), cyan (green and blue), and yellow (red and green). The secondary color optical sensors also prevent from being affected by light of a single color to integrate with primary color optical sensors for realizing a six-color sensing mechanism. Moreover, only one photo TFT is used to suppress the effect of ambient white light by compensating photocurrents without increasing the complexity of the proposed sensor structure. The measurements demonstrate that the difference in the output voltages is 15.6 V even under ambient white light with an intensity of 10000 lux, proving that the proposed sensor can yield significantly different sensing results with and without an optical input signal under intense ambient white light. Thus, the proposed sensors increase the number of sensed color light that can be integrated with a large TFT-LCD panel for multiuser interaction.

中文翻译：

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基于 a-Si:H TFT 的光学像素传感器检测多用户交互显示器的组合光信号

本文介绍了基于氢化非晶硅薄膜晶体管 (a-Si:H TFT) 的新型光学像素传感器，用于检测二次色光信号以增加感测光的颜色数量。具有不同光电TFT的三种串联结构使传感器能够接收组合任意两种原色的二次色光输入信号，例如洋红色（蓝色和红色）、青色（绿色和蓝色）和黄色（红色和绿色） ）。二次色光传感器还可以防止受单色光的影响，与原色光传感器集成，实现六色传感机制。此外，仅使用一个光电 TFT 通过补偿光电流来抑制环境白光的影响，而不会增加所提出的传感器结构的复杂性。测量结果表明，即使在强度为 10000 lux 的环境白光下，输出电压的差异也为 15.6 V，证明所提出的传感器在强环境白光下有和没有光输入信号的情况下都能产生显着不同的传感结果。因此，所提出的传感器增加了可与大型 TFT-LCD 面板集成以进行多用户交互的感测彩色光的数量。