HTC | Head Mounted Display Device

Patent: Head Mounted Display Device

Publication Number: 20180335631

Publication Date: 2018-11-22

Applicants: HTC Corporation

Abstract

A head mounted display (HMD) includes a first transparent light source, a first micro-lens array panel and a first transparent LCD panel. The first transparent light source emits a plurality of pin-lights along a first light projection path. The first micro-lens array panel having a plurality of micro-lens, and the micro-lens respectively receive the pin-lights and adjust characteristics of projection surfaces of the pin-lights to generate a plurality of adjusted lights. The first transparent LCD panel receives the adjusted lights and generates a first display image according to the adjusted lights.

BACKGROUND

Field of the Invention

The invention relates to a head mounted display device, and more particularly, to a head mounted display device with wide field of view.

Description of Related Art

With the advancement of electronic technology, head-mounted display devices that can provide display effects of virtual reality and augmented reality have become a new and popular display device.

In a head mounted display device with wide field of view in the existing technical field, a plurality of pin-lights are disposed to form an illumination array so a display image can be generated by a liquid crystal panel through a light field image algorithm. However, because projection surfaces of the pin-lights would overlap with each other on the liquid crystal panel and luminances of overlapping regions would be relatively high, the display image generated by the liquid crystal panel may show of a honeycomb-like effect, thereby deteriorating the display quality. To avoid such a phenomenon, the display image is compensated by performing complex calculations in the conventional technology, which not only increases the difficulty in design but also increases the production cost.

SUMMARY

The invention provides a head mounted display device capable of improving the display quality.

The head mounted display device of the invention includes a first transmissive light source, a first micro-lens array substrate and a first transparent LCD panel. The first transmissive light source emits a plurality of first pin-lights along a first light projection path. The first micro-lens array substrate has a plurality of first micro-lenses for respectively receiving the first pin-lights and separately adjusting characteristics of a plurality of projection surfaces of the first pin-lights to generate a plurality of adjusted lights. The first transparent LCD panel is disposed on the first light projection path. The first transparent LCD panel receives the adjusted lights and generates a first display image according to the adjusted lights.

Based on the above, the invention provides the head mounted display device disposed with the micro-lens array substrate to adjust the characteristics of the projection surfaces of the pin-lights by the micro-lenses on the micro-lens array substrate so areas of the overlapping regions of the projection surfaces of the adjusted lights projected on the transparent LCD panel may be effectively reduced. In this way, the issue regarding poor brightness uniformity may be easily solved, and the display quality may also be improved without increasing the cost and the design complexity of the head mounted display device.