Current‐mode ambient‐light sensing circuit using p‐type low‐temperature polycrystalline‐silicon TFTs and p‐i‐m diodes |
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| Authors: | Han‐Sin Lim Oh‐Kyong Kwon |
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| Affiliation: | Hanyang University, Division of Electrical and Computer Engineering, 17 Hangdang‐dong, Seongdong‐ku, Seoul, Korea 133–791, Korea |
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| Abstract: | Abstract— A current‐mode ambient‐light sensing circuit, which is composed of p‐intrinsic‐metal (p‐i‐m) diodes and p‐type low‐temperature polycrystalline‐silicon (LTPS) thin‐film transistors (TFTs) for autobrightness control of display panels. The proposed sensing circuit exhibits a wide dynamic range of 56 dB, while the output signal range is 1.8 times wider than that of a previously reported sensing circuit. |
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| Keywords: | LTPS TFT p‐i‐m diode light sensor brightness control SoP |
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