US 12,345,911 B1
Display device including polarizing beam splitter, sub-reflective elements, reflective polarizer, and reflective display unit
Yuet-Wing Li, Tainan (TW); Kuan-Yu Chen, Tainan (TW); and Chi-Wen Lin, Tainan (TW)
Assigned to Himax Display, Inc., Tainan (TW)
Filed by Himax Display, Inc., Tainan (TW)
Filed on Sep. 2, 2024, as Appl. No. 18/822,423.
Claims priority of provisional application 63/636,117, filed on Apr. 19, 2024.
Int. Cl. F21V 8/00 (2006.01); G02F 1/1335 (2006.01); G02F 1/13357 (2006.01)
CPC G02B 6/0056 (2013.01) [G02B 6/0018 (2013.01); G02B 6/0055 (2013.01); G02B 6/0088 (2013.01); G02B 6/009 (2013.01); G02B 6/0091 (2013.01); G02F 1/133524 (2013.01); G02F 1/133615 (2013.01); G02F 1/133616 (2021.01)] 12 Claims
OG exemplary drawing
 
1. A display module, comprising:
a plurality of light sources, configured to provide a plurality of illumination beams;
a light guide plate, having a first surface, a second surface opposite to the first surface, and a plurality of incident surfaces connecting the first surface and the second surface, the illumination beams entering the light guide plate through the incident surfaces;
a reflective element, connected to the light guide plate and configured to change a propagation direction of at least one part of the illumination beams, the reflective element is a polarizing beam splitter (PBS) film and comprises a plurality of reflective surfaces, and the reflective surfaces reflect the illumination beams having a first polarization direction;
a reflective display unit, capable of modulating a polarization state of the illumination beams to form modulated beams, the second surface being disposed between the reflective display unit and the first surface; and
a reflective polarizer, wherein the first surface being disposed between the second surface and the reflective polarizer, the reflective polarizer filtering the modulated beams into an image beam,
wherein the reflective element comprises a plurality of sub-reflective elements arranged along a second direction, the sub-reflective elements are embedded within the light guide plate or disposed on the first surface, where the second direction is a direction from the reflective display unit toward the reflective polarizer.