US 12,405,469 B2
Head mounted display and display device thereof
Kuei-Chun Liu, Taoyuan (TW); Wei Chun Chen, Taoyuan (TW); and Ching-Chia Chou, Taoyuan (TW)
Assigned to HTC Corporation, Taoyuan (TW)
Filed by HTC Corporation, Taoyuan (TW)
Filed on Jun. 30, 2023, as Appl. No. 18/344,856.
Prior Publication US 2025/0004274 A1, Jan. 2, 2025
Int. Cl. G02B 27/01 (2006.01); G02B 27/28 (2006.01)
CPC G02B 27/0172 (2013.01) [G02B 27/283 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A display device, comprising:
a display, having a plurality of sub-regions, the sub-regions respectively transmit a plurality of image light beams with a plurality of different polarization directions; and
an image focus length adjuster, disposed adjacent to the display, adjusts a focus length of each of the image light beams according to each of the polarization directions of each of the image light beams;
wherein the display comprises:
a display panel, configured to generate a display image;
a polarizer, disposed overlapping with the display panel, is configured to convert a polarization state of the display image; and
a liquid crystal array substrate, disposed adjacent to the polarizer, has a plurality of liquid crystal regions respectively corresponding to the sub-regions, and the liquid crystal regions respectively receive a plurality of sub-region images of the display image, and control a polarization direction of the sub-region images to generate the image light beams respectively,
wherein the image focus length adjuster is a polarization selective lens group, the polarization selective lens group comprises:
a first optical retarder, configured to receive the image light beams;
a beam splitter, overlapped with the first optical retarder;
a second optical retarder, disposed adjacent to the beam splitter; and
a reflective linear polarizer, overlapped with the second optical retarder, configured to reflect or transmit each of the image light beams according to each of the polarization directions of each of the image light beams.