A diffractive waveguide display device
A technology for display devices and diffracted waves, applied in optical components, instruments, optics, etc., can solve problems such as uneven transmission of light energy, low compactness, and complex structures, and achieve complex structures, reduced power consumption, and reduced volume and the effect of weight
Active Publication Date: 2020-02-28
BEIJING XLOONG TECH CO LTD
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[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 technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the specific content of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. The content 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 diffraction waveguide components; where,
[0034] The gradient diffractive waveguide assembly is respectively provided with an incident grating and an outgoing grating;
[003...
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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 invention relates to the field of near-eye display, in particular to a diffraction waveguide display device. Background technique [0002] As virtual reality and augmented reality technologies are gradually recognized and accepted by people, near-eye display devices have developed rapidly, such as Microsoft's Hololens and Magic Leap's Magic Leap One. The near-eye display in augmented reality technology can superimpose virtual images on the real scene, and at the same time have perspective characteristics, without affecting the normal observation of the real scene. The way of coupling virtual images into human eyes by using traditional optical components has been adopted, including prisms, semi-transparent mirrors, free-form surface waveguides, mirror array waveguides, diffractive waveguides, etc. Diffraction waveguide display technology uses diffraction grating to realize the incidence, turning and exit of light, and uses the principle of total re...
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IPC IPC(8): G02B27/01
CPCG02B27/0101
Inventor 史晓刚王丙杰
Owner BEIJING XLOONG TECH CO LTD