Compact Optical Sensor Based on Thin-Film Transistors for Large Interactive Displays Using Red/Green/Blue Laser Pointers

Fu Hsing Chen; Chia Lun Lee; Sung Chun Chen; Wei Sheng Liao; Ching Lang Hung; Chia Wei Kuo; Jian Shen Yu; Chih Lung Lin

doi:10.1109/LED.2020.2987031

Compact Optical Sensor Based on Thin-Film Transistors for Large Interactive Displays Using Red/Green/Blue Laser Pointers

Fu Hsing Chen, Chia Lun Lee, Sung Chun Chen, Wei Sheng Liao, Ching Lang Hung, Chia Wei Kuo, Jian Shen Yu, Chih Lung Lin

Department of Electrical Engineering

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

A compact thin-film transistor-based (TFT-based) optical sensor is fabricated by combining the processes of hydrogenated amorphous silicon (a-Si:H) and color filters, which are extensively used in liquid crystal displays (LCDs). To increase sensor density of an interactive display and thereby to achieve the accurate detection of the position of optical inputs, the proposed optical sensor combines three sensing structures that respectively detect red, green, and blue light. The three sensing structures use only one ambient light compensation structure, further simplifying the proposed sensor. Measurements demonstrate that red, green, and blue light from 5 mW laser pointers is successfully detected under ambient illumination from 0 lux to 16,000 lux, benefiting the realization of complete optical input functions for large-scale interactive applications.

Original language	English
Article number	9063456
Pages (from-to)	876-879
Number of pages	4
Journal	IEEE Electron Device Letters
Volume	41
Issue number	6
DOIs	https://doi.org/10.1109/LED.2020.2987031
Publication status	Published - 2020 Jun

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/LED.2020.2987031

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title = "Compact Optical Sensor Based on Thin-Film Transistors for Large Interactive Displays Using Red/Green/Blue Laser Pointers",

abstract = "A compact thin-film transistor-based (TFT-based) optical sensor is fabricated by combining the processes of hydrogenated amorphous silicon (a-Si:H) and color filters, which are extensively used in liquid crystal displays (LCDs). To increase sensor density of an interactive display and thereby to achieve the accurate detection of the position of optical inputs, the proposed optical sensor combines three sensing structures that respectively detect red, green, and blue light. The three sensing structures use only one ambient light compensation structure, further simplifying the proposed sensor. Measurements demonstrate that red, green, and blue light from 5 mW laser pointers is successfully detected under ambient illumination from 0 lux to 16,000 lux, benefiting the realization of complete optical input functions for large-scale interactive applications.",

author = "Chen, {Fu Hsing} and Lee, {Chia Lun} and Chen, {Sung Chun} and Liao, {Wei Sheng} and Hung, {Ching Lang} and Kuo, {Chia Wei} and Yu, {Jian Shen} and Lin, {Chih Lung}",

note = "Funding Information: Manuscript received December 31, 2019; revised March 10, 2020; accepted April 4, 2020. Date of publication April 10, 2020; date of current version May 21, 2020. This work was supported in part by the Advanced Optoelectronic Technology Center, National Cheng Kung University, Tainan, Taiwan, in part by the Ministry of Science and Technology of Taiwan under Project MOST 107-2221-E-006-184-MY3, and in part by AU Optronics Corporation. The review of this letter was arranged by Editor S. J. Koester. (Corresponding author: Chih-Lung Lin.) Fu-Hsing Chen, Chia-Lun Lee, Sung-Chun Chen, and Wei-Sheng Liao are with the Department of Electrical Engineering, National Cheng Kung University, Tainan 701-01, Taiwan. Publisher Copyright: {\textcopyright} 1980-2012 IEEE.",

year = "2020",

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AU - Hung, Ching Lang

AU - Kuo, Chia Wei

AU - Yu, Jian Shen

AU - Lin, Chih Lung

N1 - Funding Information: Manuscript received December 31, 2019; revised March 10, 2020; accepted April 4, 2020. Date of publication April 10, 2020; date of current version May 21, 2020. This work was supported in part by the Advanced Optoelectronic Technology Center, National Cheng Kung University, Tainan, Taiwan, in part by the Ministry of Science and Technology of Taiwan under Project MOST 107-2221-E-006-184-MY3, and in part by AU Optronics Corporation. The review of this letter was arranged by Editor S. J. Koester. (Corresponding author: Chih-Lung Lin.) Fu-Hsing Chen, Chia-Lun Lee, Sung-Chun Chen, and Wei-Sheng Liao are with the Department of Electrical Engineering, National Cheng Kung University, Tainan 701-01, Taiwan. Publisher Copyright: © 1980-2012 IEEE.

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Compact Optical Sensor Based on Thin-Film Transistors for Large Interactive Displays Using Red/Green/Blue Laser Pointers

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