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Optical waveguide assembly and display device including the same

A technology of optical waveguide and components, which is applied in the field of optical transmission, can solve the problems of large overall thickness of display equipment, unfavorable miniaturization and light weight of equipment, and achieve the effects of simple structure, easy manufacturing, and simple control method

Pending Publication Date: 2022-03-11
NINGBO SUNNY OPOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, this stacked structure of waveguide sheets will lead to a large overall thickness of the display device, which is not conducive to the miniaturization and weight reduction of the device.

Method used

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  • Optical waveguide assembly and display device including the same
  • Optical waveguide assembly and display device including the same
  • Optical waveguide assembly and display device including the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] figure 1 A schematic structural diagram of an optical waveguide assembly provided by an embodiment of the present application.

[0062] Such as figure 1 As shown, this embodiment provides an optical waveguide assembly, including:

[0063] The waveguide 1 includes a first optical surface and a second optical surface opposite to the first optical surface, and the waveguide 1 is used for total reflection and transmission of light therein; and

[0064] At least two diffractive units, where

[0065] - the first diffraction unit 2, comprising a first in-coupling liquid crystal grating 21 and a first out-coupling liquid crystal grating 22 arranged on the first optical surface, the first in-coupling liquid crystal grating 21 and the first out-coupling liquid crystal grating 22 are set to When the voltage or no voltage is applied, it is in the grating state in the first direction, and the first coupling-in liquid crystal grating 21 is used to couple the first light into the w...

Embodiment 2

[0114]The optical waveguide assembly provided in this embodiment also includes a third diffraction unit (not shown in the figure), the third diffraction unit includes a third in-coupling liquid crystal grating and a third out-coupling liquid crystal grating, the third in-coupling liquid crystal grating is arranged on the first An in-coupling liquid crystal grating 21 is arranged on a surface opposite to the waveguide plate 1 or a second in-coupling liquid crystal grating 31 is arranged on a surface opposite to the waveguide plate 1, and a third out-coupling liquid crystal grating is arranged on the first out-coupling liquid crystal grating The grating 22 is arranged on a surface opposite to the waveguide plate 1 or on a surface of the second outcoupling liquid crystal grating 32 opposite to the waveguide plate 1, and the third incoupling liquid crystal grating and the third outcoupling liquid crystal grating are arranged to be The raster state in the first direction when voltag...

Embodiment 3

[0125] Figure 5 It is a schematic structural diagram of a display device provided by an embodiment of the present application.

[0126] Such as Figure 5 As shown, this embodiment also provides a display device, including:

[0127] The projection light machine 10, the projection light machine 10 includes a display chip 101 and a projection lens 102, the display chip 101 is used to control the output of the first light and the second light of the display image at a certain frequency in time sequence, and the projection lens 102 is used to project the display chip 101 output light; and

[0128] The optical waveguide assembly, the optical waveguide assembly is the optical waveguide assembly described in any of the above embodiments, at least the first coupling liquid crystal grating 21 of the first diffraction unit 2 of the optical waveguide assembly and the second coupling liquid crystal grating 21 of the second diffraction unit 3 The grating 31 is used to couple the light p...

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Abstract

The invention provides an optical waveguide assembly which comprises a waveguide sheet and at least two diffraction units, the first diffraction unit comprises a first coupling-in liquid crystal grating and a first coupling-out liquid crystal grating, the first coupling-in liquid crystal grating is used for coupling first light into the waveguide sheet, and the first coupling-out liquid crystal grating is used for coupling the first light out of the waveguide sheet; the second diffraction unit comprises a second coupling-in liquid crystal grating and a second coupling-out liquid crystal grating, the second coupling-in liquid crystal grating is used for coupling the second light into the waveguide plate, and the second coupling-out liquid crystal grating is used for coupling the second light out of the waveguide plate; according to the invention, by alternately applying voltage to each diffraction unit, the first coupled-in liquid crystal grating and the first coupled-out liquid crystal grating of the first diffraction unit or the second coupled-in liquid crystal grating and the second coupled-out liquid crystal grating of the second diffraction unit are in a grating state in the first direction, so that light rays with different wavelengths can be respectively diffracted; and the full-color display is simple in structure, light, thin and small.

Description

technical field [0001] The present application relates to the technical field of optical transmission, in particular to an optical waveguide component and a display device including the optical waveguide component. Background technique [0002] Display devices are mainly used to display pictures or videos to human eyes, and display devices can be widely used in fields such as virtual reality, augmented reality, mixed reality, or military affairs. [0003] The display device includes an optical waveguide sheet and an image source. The image source inputs light into the waveguide sheet, and enters the human eye after diffraction to form a visual difference, thereby forming a 3D effect. In order to give users a better visual experience, the display device needs to display in full color. [0004] However, the transmission efficiency and diffraction angle of the single-layer waveguide are different for different wavelengths of light, which usually leads to the imbalance of the r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/01G02F1/137G02F1/23G02F1/133
CPCG02B27/0101G02F1/13718G02F1/23G02F1/13306G02F1/137G02F1/133G02B27/01
Inventor 马珂奇徐钦锋杜佳玮
Owner NINGBO SUNNY OPOTECH CO LTD
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