Waveguide display device

A technology for display devices and waveguides, applied in optical components, optics, instruments, etc., can solve the problems of complex gradient coating process and high manufacturing cost

Inactive Publication Date: 2018-11-23
SHANGHAI NORTH OCEAN PHOTONICS CO LTD
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  • Abstract
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Problems solved by technology

The patents "Optical Display System" (CN107690599A) and "OpticalWaveguide" (US9329325B2) adopt the method of coating one or more layers of gradient film on a single optical waveguide to change the diffraction efficiency, but the gradient coating process is complicated and because this process step needs to be It is performed on a monolithic optical waveguide, so the manufacturing cost is high

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Embodiment Construction

[0046] In order to make the realization goals and technical methods of the present invention easy to understand, the present invention will be further elaborated below in conjunction with the accompanying drawings and specific implementation examples.

[0047] The present invention can be applied to optical see-through augmented reality systems based on optical waveguides, such as figure 1 As shown, the augmented reality system 1 includes a left-eye optical waveguide 2 , a right-eye optical waveguide 3 , a spectacle frame 4 , a computing unit 5 , a position sensor 6 , an external space collector 7 and a remote computing system 8 . The left-eye optical waveguide 2 and the right-eye optical waveguide 3 have high transmittance so that the user can clearly recognize the real world. The computing unit 5 configured on the glasses side provides corresponding image signals for the left and right eyes, so that the user can obtain a three-dimensional stereoscopic experience. The calculat...

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Abstract

The invention discloses a waveguide display device, and the device comprises a waveguide substrate, an input diffraction optical element, and an output diffraction optical element. The input diffraction optical element employs a high-coupling-efficiency diffraction structure. The device achieves the optimization of the diffraction and refractive index distribution of the output diffraction opticalelement along a waveguide exit pupil extending path in an effective region through modulating the sensitive structure parameters, and enabling the luminous flux outputted by the output diffraction optical element on a unit area to remain constant. According to the technical scheme of the invention, the device can effectively improve the brightness uniformity of an output image of the waveguide display device in an effective exit pupil range, improves the optical system efficiency, and reduces the manufacturing cost.

Description

technical field [0001] The present invention relates to an augmented reality display device (AR) or a head-up display (Head-up) device, in particular to a waveguide display device that increases the brightness uniformity of an output pupil output image and improves system transmission efficiency. Background technique [0002] Augmented reality is a new technology that superimposes real-world information and virtual world information on the same screen or space in real time. By superimposing computer-generated prompt information, virtual objects or virtual scenes into the real world, a sensory experience beyond reality can be realized. Due to its ability to enhance the display output of the real environment, augmented reality has a wide range of applications in the visualization of data models, research and development and manufacturing of military weapons, flight navigation, medical training, remote control, entertainment and art. [0003] Display devices in augmented reali...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/01
CPCG02B27/0172G02B2027/0178
Inventor 楼歆晔吴兴坤黄河林涛李晴
Owner SHANGHAI NORTH OCEAN PHOTONICS CO LTD
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