Variable optical path three-dimensional virtual reality display device and method based on light polarization and double refraction
A three-dimensional virtual and display device technology, applied in optics, optical components, instruments, etc., can solve the problems of visual fatigue of viewers, visual diseases of children, etc.
Active Publication Date: 2019-03-22
ZHEJIANG UNIV +1
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However, due to the limitation of the physical characteristics of multi-layer liquid crystals, the near-eye light field display based on multi-layer eyes can only achieve an approximate focusing effect.
However, focus-vergence conflicts can cause visual fatigue to viewers, and even cause visual diseases in young children
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[0038] The present invention will be described in detail below in conjunction with the accompanying drawings, but the present invention is not limited thereto.
[0039] Such as figure 1 As shown, the present invention provides a variable optical path three-dimensional virtual reality display device based on light polarization and birefringence, including a lens group 1, a variable optical path device 2, a liquid crystal display 3 and a backlight arranged in sequence along the optical axis direction 4. The variable optical path device 2 includes several double optical path adjustment devices 5 sequentially arranged along the optical axis direction, and each double optical path adjustment device 5 is composed of a birefringent crystal device 6 and a liquid crystal cell 7;
[0040] The backlight source 4 is used to provide a uniform brightness backlight or a directional backlight for the display device;
[0041] The liquid crystal display screen 3 is used to display a three-dime...
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The invention discloses a variable optical path three-dimensional virtual reality display device and method based on light polarization and double-refraction. The device comprises a lens assembly, a variable optical path device, a liquid crystal display screen and a backlight source. The variable optical path device comprises a plurality of double-optical-distance adjusting devices. Each double-optical-distance adjusting device is formed by a double-refraction crystal device and a liquid crystal box. The liquid crystal display screen is used for displaying a three-dimensional virtual scene. The liquid crystal box is used for adjusting a polarization state of light. The double-refraction crystal device is used for, according to the polarization state of the light, adjusting an optical path.The lens assembly is used for adjusting a light path with a specific optical path distance yet, and enabling an object-image relation to be correct. The optical path is controlled through multiple double-refraction crystal devices and liquid crystal boxes, so the device may sequentially have multiple object distance states. The polarization state of the light is sequentially controlled through the liquid crystal boxes, and a decomposing mode corresponding to an object distance is synchronously displayed. Frequency of the liquid crystal boxes is higher than a frame rate of human eyes, a largedepth of field near-to-eye optical field is formed by using visual characteristics of the human eyes, and limitation of three-dimensional display in a focusing aspect is broken through.
Description
technical field [0001] The invention belongs to the technical field of near-eye three-dimensional display, and in particular relates to a variable optical path three-dimensional virtual reality display device and method based on light polarization and birefringence. Background technique [0002] In recent years, with the rapid development of photoelectric technology and computer rendering technology, near-eye virtual display technology is undergoing unprecedented development, and more and more attention has been paid to the research and application of continuous focusing near-eye virtual display. The existing near-eye virtual display technology includes virtual display technology based on binocular parallax and virtual display technology based on light field. [0003] Non-light field display technologies are mainly represented by Google glasses and oculus. This technology realizes a virtual scene with binocular parallax effect by displaying scenes of different viewing angle...
Claims
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Login to View More IPC IPC(8): G02B27/22G02B27/26G02B30/25
CPCG02B30/25G02B30/27
Inventor 李海峰刘玛丽陆驰豪刘旭
Owner ZHEJIANG UNIV