CN114924415A

CN114924415A - Virtual display equipment

Info

Publication number: CN114924415A
Application number: CN202210517063.9A
Authority: CN
Inventors: 李凡月; 申建雷; 黄伟; 沈宝良
Original assignee: Shihu Technology Nanjing Co ltd
Current assignee: Shihu Technology Nanjing Co ltd
Priority date: 2022-05-12
Filing date: 2022-05-12
Publication date: 2022-08-19

Abstract

The invention discloses virtual display equipment, which comprises a screen, a micro lens array and a micro prism array which are sequentially arranged along a light propagation direction, wherein the screen is used for displaying an image array, each sub-image in the image array, each sub-micro lens in the micro lens array and each sub-micro prism in the micro prism array are in one-to-one correspondence, the sub-images, the sub-micro lenses and the sub-micro prisms which are in mutual correspondence form a sub-imaging channel, the image of the sub-image of each sub-imaging channel is imaged to infinity after the targeted deflection is realized through the corresponding sub-micro prisms, and the output pupils of all the sub-imaging channels are overlapped. The invention adopts the microprism array to replace the condenser lens, can avoid the aberration of the condenser lens in the prior art, and improves the image definition of the virtual display equipment.

Description

Virtual display device

Technical Field

The present invention relates to a virtual display device.

Background

Virtual reality of small lens: is a new thin flat Virtual Reality (VR) display design using microlens arrays, condenser lenses, and polarization-based optical folding techniques. The optical system used had a wide field of view (FOV) of 102 ° x102 °, a wide eye box of 8.8mm, and an ergonomic eye relief of 20 mm. Meanwhile, only 3.3 mm of physical distance is needed between the display screen panel and the lens, so that the integrated VR display screen can have a compact appearance like sunglasses.

At present, in the virtual display equipment, due to all the micro lens units, aberration exists in imaging with a large field angle, so that the definition of the image is not enough.

Disclosure of Invention

The invention aims to: the invention aims to provide a virtual display device which can avoid the aberration of a condensing lens in a small lens virtual reality technology.

In order to achieve the purpose, the invention adopts the following technical scheme:

the virtual display equipment comprises a screen, a micro lens array and a micro prism array which are sequentially arranged along a light propagation direction, wherein the screen is used for displaying an image array, each sub-image in the image array, each sub-micro lens in the micro lens array and each sub-micro prism in the micro prism array correspond to each other in a one-to-one mode, the sub-images, the sub-micro lenses and the sub-micro prisms which correspond to each other form a sub-imaging channel, after the image of the sub-image of each sub-imaging channel is subjected to targeted deflection through the corresponding sub-micro prisms, the image is imaged to infinity, and the output pupils of all the sub-imaging channels are overlapped.

Furthermore, the micro lens array is a single layer or multiple layers, and the multiple layers of micro lens arrays are sequentially arranged along the light propagation direction.

Furthermore, the micro-prism array is a single layer or a plurality of layers, and the multi-layer micro-prism array is sequentially arranged along the light propagation direction.

Further, the multilayer microprism array is made of different materials.

Furthermore, the screen is a single screen or a screen array, and each sub-screen of the screen array corresponds to each sub-image in the image array one by one.

Has the advantages that: the invention adopts the microprism array to replace the condenser lens, can avoid the aberration of the condenser lens in the prior art, and improves the image definition of the virtual display equipment.

Drawings

FIG. 1 is a schematic view of the present invention.

In the figure: 1-screen; 2-an image array; 3-a microlens array; 4-microprism array; 5-pupil of human eye.

The specific implementation mode is as follows:

the invention is further explained below with reference to the drawings.

As shown in fig. 1, a virtual display device of the present invention includes a screen 1, a microlens array 3, and a microprism array 4, which are sequentially arranged along a light propagation direction, the screen 1 is used to display an image array 2, each sub-image in the image array 2, each sub-microlens in the microlens array 3, and each sub-microprism in the microprism array 4 are in one-to-one correspondence, the mutually corresponding sub-image, sub-microlens, and sub-microprism jointly form a sub-imaging channel, an image of a sub-image of each sub-imaging channel is imaged to infinity after being subjected to a targeted deflection by the corresponding sub-microprism, and output pupils of all sub-imaging channels coincide.

When the device works, the pupil 5 of the human eye can receive the light of all sub-images in the overlapping area of the output pupils of all the sub-imaging channels, the light is imaged on the retina, and each sub-image is emitted out of the output pupil at the optimized angle by the configuration of the microprism array 4, namely, the sub-image is emitted into the human eye, so that each sub-image sensed by the human eye is the light emitted from each group of different visual fields, and the final effect is that all the sub-images are spliced into a complete large-visual-field image on the retina in the human eye.

In the present invention, the microlens array 3 may be a single layer or a plurality of layers, and the plurality of layers of microlens arrays are sequentially arranged along the light propagation direction.

In the present invention, the microprism array 4 may be a single layer or a plurality of layers, and the plurality of layers of microprism arrays are sequentially arranged along the light propagation direction. The multilayer microprism array is made of different materials, and the microprism arrays made of different materials have different refractive indexes and Abbe numbers, so that the chromatic aberration of the prisms can be eliminated conveniently.

In the present invention, the screen may be a single complete screen or a screen array, and when a screen array is used, each sub-screen of the screen array corresponds to each sub-image in the image array 2 one by one.

Compared with the prior art, the invention adopts the micro-prism array to replace the condenser lens, thereby avoiding the aberration of the condenser lens in the prior art.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and amendments can be made without departing from the principle of the present invention, and these modifications and amendments should also be considered as the protection scope of the present invention.

Claims

1. A virtual display device, characterized by: the image forming device comprises a screen, a micro lens array and a micro prism array which are sequentially arranged along the light propagation direction, wherein the screen is used for displaying the image array, each sub-image in the image array, each sub-micro lens in the micro lens array and each sub-micro prism in the micro prism array are in one-to-one correspondence, the sub-image, the sub-micro lens and the sub-micro prism which are mutually corresponding form a sub-imaging channel, the image of the sub-image of each sub-imaging channel is imaged to infinity after the image of the sub-image is subjected to targeted deflection through the corresponding sub-micro prism, and the output pupils of all the sub-imaging channels are overlapped.

2. The virtual display device of claim 1, wherein: the micro lens array is a single layer or multiple layers, and the multiple layers of micro lens arrays are sequentially arranged along the light propagation direction.

3. The virtual display device of claim 1, wherein: the micro-prism array is a single layer or a plurality of layers, and the multi-layer micro-prism array is sequentially arranged along the light propagation direction.

4. A virtual display device according to claim 3, wherein: the multilayer microprism array is made of different materials.

5. The virtual display device of claim 1, wherein: the screen is a single screen or a screen array, and each sub-screen of the screen array corresponds to each sub-image in the image array one by one.