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. 10, 2026
Filed:
Mar. 17, 2025
Radiant Opto-electronics Corporation, Kaohsiung, TW;
Chia-Ying Chen, Kaohsiung, TW;
Jing-Hu Jheng, Kaohsiung, TW;
Tsung-Shun Yang, Kaohsiung, TW;
Yen-Chang Lee, Kaohsiung, TW;
I-Wen Fang, Kaohsiung, TW;
Ya-Yun Hsieh, Kaohsiung, TW;
Pei-Yu Chen, Kaohsiung, TW;
Radiant Opto-Electronics Corporation, Kaohsiung, TW;
Abstract
A backlight module comprising an upper backlight unit, and a lower backlight unit positioned beneath the upper backlight unit. The upper backlight unit includes an upper light source, an upper light guide plate for receiving light emitted from the upper light source, and a first prism sheet located on the light-emitting side of the upper light guide plate. The first prism sheet includes multiple first prisms arranged along a first direction, where the first prisms extend along a second direction, and their tips are oriented towards the upper light guide plate. The upper light source includes multiple light-emitting elements arranged along the second direction. When both the upper and lower backlight units are turned on, it operates in a wide viewing mode, and when the upper backlight unit is turned on while the lower backlight unit is turned off, it operates in a narrow viewing mode, thereby providing a switching function between the wide viewing angle mode and the narrow viewing angle mode for the backlight module. The invention also provides a display device including the backlight module.