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An ar optical system and ar display device

An optical system and display technology, which is applied in the field of AR optical system and AR display equipment, can solve problems such as blurring and ghosting of virtual images, and achieve the effect of improving clarity and weakening the influence of external stray light

Active Publication Date: 2022-05-27
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under the influence of external stray light, the virtual image displayed by the AR display device may appear ghosting or blurring

Method used

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  • An ar optical system and ar display device
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  • An ar optical system and ar display device

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0055] Example 1, when three types of incident light with wavelengths of 450nm, 550nm, and 650nm are incident in the direction perpendicular to the polarization beam splitter grating, the duty cycle is 0.5, and the period of the polarization beam splitter grating changes from 40nm to 240nm, the reflectance and The transmittance results are as Figure 5 and Image 6 shown. Depend on Figure 5 and Image 6 It can be seen that when the period of the polarization beam splitting grating and the wavelength of the incident light change, the reflectivity of S-polarized light can reach about 0.9, the transmittance of S-polarized light is almost 0; the reflectivity of P-polarized light is about below 0.2, The transmittance of P-polarized light can reach more than 0.7.

example 2

[0056] Example 2, when the three types of incident light with wavelengths of 450nm, 550nm, and 650nm are incident at an angle of 45 degrees to the polarization beam splitter grating, the duty cycle is 0.5, and the period of the polarization beam splitter grating changes from 40nm to 240nm. The rate and transmittance results are as follows Figure 7 and Figure 8 shown. Depend on Figure 7 and Figure 8 It can be seen that when the period of the polarization beam splitting grating and the wavelength of the incident light change, the reflectivity of S-polarized light can reach about 0.45, the transmittance of S-polarized light is almost 0; the reflectivity of P-polarized light is about below 0.23, The transmittance of P-polarized light can reach more than 0.5.

[0057] It can be seen from the above that when the light is incident in the direction perpendicular to the polarization beam splitter grating or at an angle of 45 degrees to the polarization beam splitter grating, th...

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Abstract

The invention discloses an AR optical system and an AR display device, which relate to the field of display technology and are used to weaken the influence of external stray light and improve the definition of a virtual picture. The AR optical system includes a display, a transparent light guide, a polarization beam splitting grating, and an optical waveguide. The transparent light guide is located on the light exit side of the display, including a light incident surface, a light exit surface, a first surface, and a second surface; the transparent light guide It is configured to make the light emitted from the display enter the transparent light guide from the light incident surface; the polarization beam splitting grating is arranged on the first surface and the second surface, and the polarization beam splitting grating is configured to transmit P-polarized light and reflect S-polarized light , so that the S-polarized light emitted by the display is totally reflected in the transparent light guide and coupled out from the light exit surface; The waveguide is configured so that the light coupled in from the light entrance area is totally reflected therein, and coupled out from the light exit area to human eyes.

Description

technical field [0001] The present invention relates to the field of display technology, and in particular, to an AR optical system and an AR display device. Background technique [0002] Augmented Reality (AR) technology mixes virtual information into real world scenes through computer technology, so that the real environment and virtual pictures are presented in the same picture in real time, which can realize real world information and virtual world information. The complementary and superimposed of each other, so that users have an immersive sense of immersion. The goal of AR technology is to integrate and interact with the virtual world in the real world scene. [0003] At present, AR display devices are mainly head-mounted, such as AR glasses. In order to meet the long-term wearing comfort, the AR display device needs to be thin enough. Among a variety of AR display technologies, the holographic optical waveguide technology uses a simple structure and small volume o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/01G02B27/28G02B27/10G02B6/122G02B6/124
CPCG02B27/0172G02B27/283G02B27/286G02B27/10G02B6/122G02B6/124
Inventor 韩娜董瑞君武玉龙王晨如栗可白家荣张浩
Owner BOE TECH GRP CO LTD