Collimating backlight source, multidirectional backlight source and three-dimensional display device

A technology of backlight and light source, which is applied in the direction of light guide, optics, optical components, etc., can solve the problems of bulky device size, high design parameter requirements, and unsatisfactory collimation effect of the outgoing beam, and achieve simple preparation and high collimation Effect

Active Publication Date: 2022-06-03
ZHEJIANG UNIV
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  • Description
  • Claims
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Problems solved by technology

This method not only requires high design parameters, but also the collimation effect of the outgoing beam is not ideal, and a large-aperture lens can achieve a better collimation effect, but the size of the device will be relatively bulky

Method used

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  • Collimating backlight source, multidirectional backlight source and three-dimensional display device
  • Collimating backlight source, multidirectional backlight source and three-dimensional display device
  • Collimating backlight source, multidirectional backlight source and three-dimensional display device

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Embodiment Construction

[0043] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described below with reference to the embodiments and the accompanying drawings.

[0044] see figure 1 and figure 2 , a schematic diagram of a three-dimensional display device based on a collimated backlight, wherein the collimated backlight consists of a laser diode 1, a fiber speckle remover 2, a free-form surface lens 3, 2 right-angle prisms 9, a first micro-nano device 4, plating The light guide plate 11 with the light splitting film and the second micro-nano device 5 are formed. The angle deflection device 6 realizes the regulation of the direction information, and the LCD 7 realizes the regulation of the intensity information.

[0045] After the outgoing beam of the laser diode 1 passes through the optical fiber speckle cleaner 2, the outgoing beam is collimated by the free-form surface lens 3 to generate a uniform light sp...

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Abstract

The collimation backlight source comprises a light source, a free-form surface lens, two right-angle prisms, a first micro-nano device, a light guide plate and a second micro-nano device, wherein two inclined surfaces of the right-angle prisms are attached together; the first micro-nano device is positioned between the two right-angle prisms; the light guide plate is plated with a light splitting film of which the transmissivity changes along with the position; wherein the height of the rectangular prism is arranged along the light source direction. The invention further discloses a three-dimensional display device which comprises the collimation light source, an angle deflection device and an LCD, wherein the angle deflection device and the LCD are sequentially arranged above a light guide plate. The invention further discloses a multidirectional backlight source and a three-dimensional display device comprising the multidirectional backlight source. According to the collimation backlight source, the multidirectional backlight source and the three-dimensional display device based on the collimation backlight source and the multidirectional backlight source respectively, a small-thickness, lighter and large-area directional display implementation mode is provided for an existing free three-dimensional display device.

Description

technical field [0001] The present invention relates to the technical field of three-dimensional display, in particular to a collimated backlight source, a multi-directional backlight source and a three-dimensional display device. Background technique [0002] With the development of technology, people increasingly hope that the real-world scene can be restored through a 3D display device, among which the autostereoscopic 3D display without wearable equipment has gradually become a research hotspot. Autostereoscopic 3D display devices can be realized by parallax barrier technology, lens array technology, multi-projection technology, etc. However, the above technologies are mostly realized by geometrical optics, which will make 3D display devices have disadvantages such as large crosstalk and small field of view. [0003] Based on the principle of diffractive optics, the angle control accuracy of the outgoing beam is high, and the degree of freedom in adjusting the angle is l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B30/33G02B6/00G02B26/08
CPCG02B30/33G02B6/005G02B6/003G02B6/0026G02B26/0875
Inventor 李海峰吴仍茂李子寅张子钧刘旭
Owner ZHEJIANG UNIV
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