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:
Feb. 21, 2023
Filed:
Apr. 24, 2022
Chicony Power Technology Co., Ltd., New Taipei, TW;
Chicony Power Technology Co, Ltd., New Taipei, TW;
Abstract
A backlight module includes a circuit board, a light-shielding plate, and a light guide plate. The circuit board is provided with first and second light-emitting units. The light-shielding plate is disposed above the circuit board. The light guide plate is disposed between the circuit board and the light-shielding plate and includes first and second single-key light guide areas. The first and second single-key light guide areas respectively have first and second through holes respectively accommodating the first and second light-emitting units. A distance between the geometric center of the first single-key light guide area and that of the light guide plate is greater than a distance between the geometric center of the second single-key light guide area and that of the light guide plate. A current flowing through the first light-emitting unit is greater than a current flowing through the second light-emitting unit.