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Holographic waveguide display device

A display device and a holographic waveguide technology, applied in the field of wearable displays, can solve problems such as blurred images, achieve the effects of reducing light energy loss, suppressing stray light, and improving light energy utilization

Active Publication Date: 2016-05-04
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The phenomenon of stray light can cause blurred images and the appearance of "ghost images"

Method used

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Embodiment Construction

[0016] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0017] The structural principle of a holographic waveguide display device in the prior art is as follows: figure 1 As shown, it includes a microdisplay 101 , a collimating mirror 102 , an aperture 103 , a waveguide 104 , an in-coupling holographic optical element 105 , and an out-coupling holographic optical element 106 . Such as figure 1 As shown, in the working process of the display device, the microdisplay 101 emits divergent light L10 with image information outward, and the divergent light L10 passes through the collimating mirror 102 and is converted into parallel light L11, and the parallel light L11 is captured by the diaphragm 103 Limiting the size of the aperture, it is incident vertically on the surface of the in-coupling holographic optical element 105, and a part of the TM polarization component passes through 105 to be the transmitted lig...

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Abstract

The invention discloses a holographic waveguide display device and belongs to the technical field of wearable display. The holographic waveguide display device comprises a micro displayer, a collimating lens, a diaphragm, a waveguide, an inlet coupling diffraction optical element and an outlet coupling diffraction optical element. The inlet coupling diffraction optical element comprises a reflection body holographic grating and a sub-wavelength one-dimensional metal nanometer grating. One side of the reflection body holographic grating is closely connected to the waveguide, and the sub-wavelength one-dimensional metal nanometer grating is arranged on the surface of the other side of the reflection body holographic grating. Photons penetrating through the reflection body holographic grating can be coupled into a surface plasma mode through the sub-wavelength one-dimensional metal nanometer grating, and thus the photons can enter the reflection body holographic grating again to be diffracted and enter the waveguide. Compared with the prior art, by means of the holographic waveguide display device, the diffraction efficiency of TM light can be improved on the premise of ensuring the high diffraction efficiency of the TE light, so that the total light energy utilization rate of the holographic waveguide display device is increased, and meanwhile stray light in transmission is effectively suppressed.

Description

technical field [0001] The invention belongs to the technical field of wearable displays, and in particular relates to a holographic waveguide display device. Background technique [0002] Holographic waveguide display is a display technology that uses a high-brightness microdisplay as an image source, uses transparent holographic goggles as a display screen, and projects an image to the human eye through a miniaturized optical system through a waveguide structure for imaging. The key technology of holographic waveguide display is to use holographic optical elements as waveguide couplers instead of traditional optical elements to form a highly integrated wearable imaging system, which has the advantages of simple structure, small size, and light weight. [0003] In the prior art, the light source and picture elements of the holographic waveguide display are microdisplays, and the natural light emitted contains both TE polarization components and TM polarization components. ...

Claims

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Application Information

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IPC IPC(8): G02B6/122G02B27/01G02B5/32
CPCG02B5/32G02B6/1226G02B27/0103G02B2027/0105
Inventor 郭静菁屠彦杨兰兰王莉莉陈燕达汪佳王保平
Owner SOUTHEAST UNIV
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