A 2‐in. a‐Si:H TFT‐LCD with embedded backlight control TFT sensors with various channel widths |
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| Authors: | Se Hwan Kim Eung Bum Kim Jae Hwan Oh Ji Ho Hur Jin Jang |
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| Affiliation: | Department of Information Display and the Advanced Display Research Center, Kyung Hee University, Seoul 130–701, Korea |
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| Abstract: | Abstract— A 2.0‐in. a‐Si:H TFT‐LCD with embedded TFT sensors for the control of the backlight intensity according to the ambient light intensity has been developed. Two types of a‐Si:H TFT sensors with various channel widths were embedded into a TFT backplane with bottom‐ and top‐gate structures for measuring the ambient light and backlight illumination, respectively. The output signal, measured by a readout IC, increased with backlight intensity until 20,000 lux. |
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| Keywords: | a‐Si:H TFT backlight brightness photosensor photo leakage current |
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