US 10,705,343 B2Granted

Head mounted display apparatus and image generating method

AssigneeHTC Corporation

InventorsBo-Wen Xiao, Fu-Cheng Fan, Hsiu-An Lin

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Abstract

A head mounted display (HMD) and an image generating method thereof are provided. The HMD includes a display device, an optical converter, an optical shutter and an optical engine. The display device receives an AR image and/or an external image, and transmits a display image along a projection direction. The optical converter receives the display image and adjusts an output angle to project an output image to a target area. The optical shutter opens a transmission path for the external image to the display device during a first time period, and inhibits the transmission path during a second time period, where the first time period is longer than the second time period. A first luminance of the AR image provided by the optical engine in the first time period is lower than a second luminance of the AR image provided by the optical engine in the second time period.

Claims13

Dependent claims

A head mounted display apparatus, comprising:

a display, receiving an augmented reality image and/or an external image, and sending a display image along a projection direction;
an optical converter, disposed at a first side of the display, and receiving the display image and changing an emitting angle of the display image to send an output image to a target region;
an optical shutter, disposed at a second side of the display, and configured to shield a transmission path between the external image and the display;
and
an optical engine, sending the augmented reality image to the display,
wherein the optical shutter opens the transmission path during a first time interval, and shields the transmission path during a second time interval;
the first time interval is longer than the second time interval;
a first brightness of the augmented reality image provided by the optical engine during the first time interval is smaller than a second brightness of the augmented reality image provided by the optical engine during the second time interval,
wherein a time length ratio of the first time interval and the second time interval is N:1, a ratio of the second brightness and the first brightness is N:1, and N is a positive integer greater than 1.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/191,440Filed 15 Nov 2018 · us provisional application
Priority: 22 May 2018
Published: US 2019/0361239 A128 Nov 2019
Granted: 7 Jul 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

G02B 27/0172
Head mounted: characterised by optical features
G06T 11/00
Two-dimensional [2d] image generation
G02B 2027/0118
Characterised by optical features: comprising devices for improving the contrast of the display / brillance control visibility
G02B 2027/0123
Characterised by optical features: comprising devices increasing the field of view