US 12,455,660 B2
Optical touch detection circuit and optical touch display panel
Wei Cui, Shenzhen (CN)
Assigned to SHENZHEN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD., Shenzhen (CN)
Appl. No. 17/440,291
Filed by Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Shenzhen (CN)
PCT Filed Jul. 16, 2021, PCT No. PCT/CN2021/106744
§ 371(c)(1), (2) Date Jan. 12, 2023,
PCT Pub. No. WO2023/279428, PCT Pub. Date Jan. 12, 2023.
Claims priority of application No. 202110758670.X (CN), filed on Jul. 5, 2021.
Prior Publication US 2025/0103167 A1, Mar. 27, 2025
Int. Cl. G06F 3/042 (2006.01); G06F 3/041 (2006.01); G06F 3/044 (2006.01); H10F 30/282 (2025.01); H10F 39/10 (2025.01); H10F 77/166 (2025.01)
CPC G06F 3/0421 (2013.01) [G06F 3/0412 (2013.01); G06F 3/0416 (2013.01); G06F 3/042 (2013.01); G06F 3/044 (2013.01); H10F 30/282 (2025.01); H10F 39/103 (2025.01); H10F 77/1662 (2025.01)] 7 Claims
OG exemplary drawing
 
1. An optical touch detection circuit, comprising:
a photosensitive module configured to generate a photoelectric signal; and
a detection module connected to the photosensitive module, the detection module configured to implement an optical touch function based on the photoelectric signal;
wherein the photosensitive module comprises a first thin film transistor, a control terminal of the first thin film transistor is electrically connected to a first signal input terminal, an input terminal of the first thin film transistor is electrically connected to a second signal input terminal, and an output terminal of the first thin film transistor is electrically connected to the detection module;
wherein the detection module comprises a storage capacitor and a second thin film transistor; the storage capacitor comprises a first terminal and a second terminal, the first terminal of the storage capacitor is electrically connected to the output terminal of the first thin film transistor, and the second terminal of the storage capacitor is electrically connected to a third signal input terminal; and a control terminal of the second thin film transistor is electrically connected to a fourth signal input terminal, an input terminal of the second thin film transistor is electrically connected to the output terminal of the first thin film transistor, and an output terminal of the second thin film transistor is electrically connected to a detection input terminal; and
wherein the first signal input terminal and the third signal input terminal are connected to different distinct voltage signals, respectively.