US 12,446,335 B2
Touch screen panel for sensing touch using TFT photodetectors integrated thereon
Hoon Kim, La Habra, CA (US)
Assigned to Hoon Kim, La Habra, CA (US)
Filed by Hoon Kim, La Habra, CA (US)
Filed on Apr. 19, 2024, as Appl. No. 18/641,093.
Application 18/641,093 is a continuation of application No. 17/990,325, filed on Nov. 18, 2022, granted, now 11,978,747.
Application 17/990,325 is a continuation of application No. 17/366,165, filed on Jul. 2, 2021, granted, now 11,515,346, issued on Nov. 29, 2022.
Application 17/366,165 is a continuation of application No. 16/824,071, filed on Mar. 19, 2020, granted, now 11,094,724, issued on Aug. 17, 2021.
Claims priority of provisional application 62/889,560, filed on Aug. 20, 2019.
Prior Publication US 2024/0266370 A1, Aug. 8, 2024
Int. Cl. H10F 39/00 (2025.01); G02F 1/1333 (2006.01); G02F 1/13357 (2006.01); G06F 3/041 (2006.01); G06F 3/042 (2006.01); G06V 40/13 (2022.01); H10F 30/282 (2025.01); H10F 77/16 (2025.01); H10K 59/40 (2023.01); H10K 59/65 (2023.01); G02F 1/133 (2006.01); H10K 59/60 (2023.01)
CPC H10F 39/80 (2025.01) [G02F 1/13338 (2013.01); G02F 1/133606 (2013.01); G06F 3/041662 (2019.05); G06F 3/04182 (2019.05); G06F 3/0421 (2013.01); G06V 40/1318 (2022.01); H10F 30/282 (2025.01); H10F 39/014 (2025.01); H10F 39/8033 (2025.01); H10F 39/8037 (2025.01); H10F 39/80377 (2025.01); H10F 77/16 (2025.01); H10K 59/40 (2023.02); H10K 59/65 (2023.02); G02F 1/13318 (2013.01); H10K 59/60 (2023.02)] 16 Claims
OG exemplary drawing
 
1. A touch screen panel using a thin film transistor (TFT) photodetector, the touch screen panel comprising:
a touch panel including a plurality of unit patterns for sensing light reflected by a touch by using a TFT photodetector; and
a controller configured to read touch coordinates on the touch panel,
wherein the TFT photodetector comprises:
an active layer formed of amorphous silicon or polycrystalline silicon on an amorphous transparent material;
a gate electrode; and
a backlight light source configured to irradiate backlight in a transmission direction of the transparent material through a space between adjacent TFT photodetector;
an oxide film interposed between the active layer and the gate electrode, and
wherein electrons by tunneling from the active layer to the oxide film migrate into the gate electrode,
wherein the plurality of unit patterns collect the backlight passed through the transparent material and then reflected back from a body, and the controller is configured to process touch recognition along with the positioning of the body by the light generated from the backlight light source and then collected.