The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 18, 2022
Filed:
Mar. 19, 2020
E Ink Holdings Inc., Hsinchu, TW;
Hsiao-Wen Zan, Hsinchu, TW;
Chuang-Chuang Tsai, Hsinchu, TW;
Ching-Fu Lin, Hsinchu, TW;
Chao-Hsuan Chen, Hsinchu, TW;
Zong-Xuan Li, Hsinchu, TW;
Wei-Tsung Chen, Hsinchu, TW;
E Ink Holdings Inc., Hsinchu, TW;
Abstract
A proximity sensor includes a substrate, a light source, a finger electrode, an active layer, and a transparent electrode layer. The substrate has opposite top and bottom surfaces. The light source faces toward the bottom surface of the substrate. The finger electrode is located on the top surface of the substrate, and has finger portions and gaps between every two adjacent finger portions. The active layer covers the finger electrode, and is located in the gaps. The transparent electrode layer is located on the active layer. When the light source emits light, the light through the gaps sequentially passes through the active layer and the transparent electrode layer onto a reflective surface. The light is reflected by the reflective surface to form reflected light, and the reflected light passes through the transparent electrode layer and is received by the active layer.