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:
Sep. 12, 2023
Filed:
Jan. 27, 2022
Tpk Touch Solutions (Xiamen) Inc., Fujian, CN;
Jian Xing Luo, Nanping, CN;
Jian Bin Yan, Xianyou County, CN;
Kai Lun Dai, Zhangzhou, CN;
Zhang Zheng Yang, Sanming, CN;
TPK Touch Solutions (Xiamen) Inc., Xiamen, CN;
Abstract
A light guide module includes a cover plate, a light-shielding layer, a light guide plate, and at least one light source. The light-shielding layer is disposed under the cover plate and has a width less than about 4 mm. The light guide plate is disposed under the cover plate. The light guide plate has a reflective surface and a light-exiting surface opposite to each other, and a light-incident surface and three side surfaces connected between the reflective surface and the light-exiting surface. The light source is configured to emit light toward the light-incident surface. A surface roughness of the three side surfaces ranges from about 300 nm to about 400 nm, so that a change rate of brightness measured by any adjacent two of measuring points evenly distributed on the light-exiting surface is between about 8% and about 12%.