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Four-primary-color wide-gamut AR glasses and color management method thereof

A technology of AR glasses and color management, which is applied in the direction of instruments, optics, static indicators, etc., can solve the problems of rich colors, unable to cover the color range, affecting the viewing effect of AR glasses and market penetration rate, etc., to achieve accurate restoration and improve display effect of effect

Active Publication Date: 2021-06-18
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the existing AR virtual glasses technology is basically a three-color color system, and the color reproduction cannot be compared with the existing OLED and LCD displays. OLED can achieve more than 130% of the NTSC color gamut area, while AR glasses The color gamut has not exceeded 100% of NTSC, and it cannot even cover the color range of the sRGB standard. It cannot express rich colors in the color display effect, which affects the viewing effect and market penetration rate of AR glasses.

Method used

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  • Four-primary-color wide-gamut AR glasses and color management method thereof
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  • Four-primary-color wide-gamut AR glasses and color management method thereof

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Experimental program
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Effect test

Embodiment 1

[0033] Such as figure 1 As shown, the AR glasses include a micro-projector optical engine 1 (LCOS device), a diffractive optical waveguide 2 for relaying image light, a red, yellow, blue and green four-color laser light source 3, and a beam splitting prism 4 . The diffractive optical waveguide 2 has a waveguide substrate 21 for relaying images. The waveguide substrate has a grating group for emitting image light, including an in-coupling grating 22, a relay grating 23, and an out-coupling grating 24. The in-coupling grating 22 is arranged on the waveguide At the light entrance of the substrate, the relay grating 23 is arranged between the coupling grating and the outcoupling grating, the outcoupling grating 24 is arranged at the light exit of the waveguide substrate 21, and the gratings 22, 23, 24 are arranged There are multiple wedge-shaped microstructures for diffracting image light, and the size of the microstructures is between 1nm and 100nm. Multiple diffractive microstru...

Embodiment 2

[0043] In order to determine the above-mentioned system transformation matrix, the following steps may also be included:

[0044] Step 1, using a colorimeter to measure the red spectral curve IR (λ), green spectral curve IG (λ), blue spectral curve IB (λ), and yellow spectral curve IY (λ) of the display device respectively,

[0045] Specifically, it can be said that the RGBY grayscale matrix of the display device is adjusted to a value of gl is the maximum value of the gray scale. If the display is 8th, gl=255, and then measure the spectral curves of each color with a colorimeter. The spectral curves can be obtained by performing spectral tests every 5nm or 10nm from 380nm to 780nm.

[0046] Step 2, determine the system conversion matrix according to the red spectral curve IR(λ), the green spectral curve IG(λ), the blue spectral curve IB(λ), and the yellow spectral curve IY(λ).

[0047] The specific determination method in step 2 is as follows, the reflectance Lr of the red ...

Embodiment 3

[0065] In order to solve the color crossing phenomenon caused by the different vibration frequencies of red, green, blue and yellow light on the waveguide substrate, the following steps can also be included: the calculated reflectance of red pixels, green pixels, blue pixels, and yellow pixels and color compensation matrix multiplied. It can solve the color crossing phenomenon caused by the waveguide substrate due to the different vibration frequencies of red, green, blue and yellow light. Among them, x1, x2, x3, and x4 are all constants between 0 and 1.

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Abstract

The invention discloses four-primary-color wide-color-gamut AR glasses which comprise a micro-projection light machine, a diffraction optical waveguide, a light source, a beam splitter prism, a calculation storage control circuit and a communication module; the communication module is used for receiving an image signal source signal sent by external equipment, acquiring an original RGB value from the image signal source signal and outputting the original RGB value to the calculation storage control circuit; the calculation and storage control circuit is used for performing a four-primary-color color management method on the original RGB values to calculate pixel reflectivity values of red, green, blue and yellow channels, generating red, green, blue and yellow driving signals according to the pixel reflectivity values and outputting the red, green, blue and yellow driving signals to the micro-projection light machine; and the light source emits light, which is reflected to the micro-projection ray machine through the beam splitter prism. The micro-projection light machine reflects red, yellow, blue and green light signals according to the red, green, blue and yellow driving signals and transmits the red, yellow, blue and green light signals to human eyes through the diffracted light export. The invention further discloses a four-primary-color color management method, so that the wide color gamut of the four-primary-color AR glasses is realized, the color information is accurately restored, and the display effect of the AR glasses is improved.

Description

technical field [0001] The invention relates to the technical field of AR glasses, in particular to AR glasses with four primary colors and a wide color gamut and a color management method thereof. Background technique [0002] At present, the existing AR virtual glasses technology is basically a three-color color system, and the color reproduction cannot be compared with the existing OLED and LCD displays. OLED can achieve more than 130% of the NTSC color gamut area, while AR glasses The color gamut of AR glasses has not exceeded 100% of NTSC, and it cannot even cover the color range of the sRGB standard. It cannot express rich colors in the color display effect, which affects the viewing effect and market penetration rate of AR glasses. Therefore, AR glasses can add a yellow primary color on the basis of the three primary colors of red, green, and blue to further increase its color gamut area and improve color display performance. Contents of the invention [0003] The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/00G02B27/01
CPCG09G3/001G02B27/0172G02B2027/0178G02B2027/014
Inventor 张卫万丽芳耿孝臣
Owner NANTONG UNIVERSITY
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