Diffraction waveguide display device
A display device, diffracted wave technology, applied in optical components, instruments, optics, etc., can solve the problems of uneven light energy transmission, low compactness, complex structure, etc., to solve the complex structure, reduce power consumption, reduce volume and the effect of weight
Active Publication Date: 2019-03-01
BEIJING XIAOLONG TECH CO LTD
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Problems solved by technology
[0006] Based on the problems existing in the prior art, the object of the present invention is to provide a diffractive waveguide display device, which can effectively solve the existing problems of the existing diffractive waveguide display device such as complex structure, low compactness, low light efficiency, and uneven light energy transmission. question
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[0031] The following describes the technical solutions in the embodiments of the present invention clearly and completely in combination with the specific content of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention. The content that is not described in detail in the embodiments of the present invention belongs to the prior art known to those skilled in the art.
[0032] A diffractive waveguide display device according to an embodiment of the present invention includes:
[0033] MEMS laser scanning components and graded diffractive waveguide components; among them,
[0034] The graded diffractive waveguide components are respectively provided with an entrance grating and an exit...
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The invention discloses a diffraction waveguide display device. The diffraction waveguide display device comprises a MEMS laser scanning assembly and a gradient diffraction waveguide assembly; the gradient diffraction waveguide assembly is provided with an incident grating and an emergent grating; the output end of the MEMS laser scanning assembly, which outputs an image reflected beam, is corresponding to the incident grating of the gradient diffraction waveguide assembly; and the emergent end of the gradient emergent grating of the gradient diffraction waveguide assembly is corresponding tothe eyes of an observer. The diffraction waveguide display device is composed of the MEMS laser scanning assembly and the gradient diffraction waveguide assembly, and therefore, power consumption canbe effectively reduced, and the size and weight of the display device can be reduced; (2) the diffraction waveguide assembly adopts the gradient grating as the emergent grating with a gradient duty cycle or gradient depth, so that more uniform light output can be realized; a concave mirror of a special surface form is used to convert divergent scanning MEMS laser into convergent scanning light andguide the convergent scanning light into the diffraction waveguide.
Description
Technical field [0001] The present invention relates to the field of near-eye display, in particular to a diffractive waveguide display device. Background technique [0002] With the gradual recognition and acceptance of virtual reality and augmented reality technologies, near-eye display devices have developed rapidly, such as Microsoft's Hololens and Magic Leap's Magic Leap One. The near-eye display in the augmented reality technology can superimpose virtual images on the real scene, and at the same time has the perspective characteristics, and does not affect the normal observation of the real scene. Traditional optical elements are used to couple virtual images into the human eye, including prisms, transflective lenses, free-form surface waveguides, mirror array waveguides, diffractive waveguides, etc. Diffractive waveguide display technology uses diffraction gratings to realize the incidence, transition and emission of light, and uses the principle of total reflection to ac...
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Login to View More IPC IPC(8): G02B27/01
CPCG02B27/0101
Inventor 王丙杰史晓刚
Owner BEIJING XIAOLONG TECH CO LTD