Image display apparatus and head-mounted display device

Abstract

The invention discloses an image display apparatus. The image display apparatus comprises a display screen, and an ocular-side double-convex lens, a reflection element and a first achromatic lens which are disposed on an image light transmission optical path of the display screen, wherein the first achromatic lens is coaxially arranged with the ocular-side double-convex lens and is disposed at the light- emitting side of the ocular-side double-convex lens, an optical axis of the display screen and an optical axis of the ocular-side double-convex lens form a preset included angle, the reflection element is disposed between the display screen and the ocular-side double-convex lens, and image light is reflected on the reflection element, sequentially penetrates the ocular-side double-convex lens and the first achromatic lens, and then reaches a watching side so as to form a virtual image. The invention further discloses a head-mounted display device. According to the formed optical system, the system space volume can be reduced, compressed and amplified, a series of image errors such as coma, astigmation, aberration and the like can be improved, the magnitude of distortion is controlled, and under the condition that viewers can see amplified virtual images with excellent image quality, the requirements of a conventional head-mounted display device for miniaturization and light-weight design are satisfied.

Description

technical field [0001] The present invention relates to the field of optical technology, in particular to an image display device and a head-mounted display device. Background technique [0002] VR (Virtual Reality)—that is, virtual reality display technology. It was proposed by Jaron Lanier, the founder of the American VPL company in the 1980s. It integrates computer graphics technology, computer simulation technology, sensor technology, display technology and other sciences. Technology, which creates a virtual information environment on a multi-dimensional information space, enables users to have an immersive sense of immersion, has a perfect interaction ability with the environment, and helps to inspire ideas. [0003] The display principle of the virtual reality display device is to pull the near image generated by the display to the distance through the optical system to enlarge it, almost filling the human field of vision, thereby creating a sense of immersion. Since ...

AI Technical Summary

Problems solved by technology

In response to the above requirements, the main solution currently on the market is to use a single-piece resin aspheric lens or a Fresnel lens. Although a single-piece lens can reduce weight, the diameter of the lens is generally between 35- 50mm, and in order to ensure the image quality, the focal length is generally greater than 35mm, which inevitably increases the horizontal and vertical dimensions of the virtual reality display device

In addition, due to the use of a single lens, the image is severely distorted, and software must be used to correct the distortion, which increases the load on the processor, resulting in delays in the image, and in severe cases, it is easy to bring dizziness to the user

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