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Light guide plate, double-vision backlight module and double-vision display device

A technology of backlight module and light guide plate, which is applied in the direction of lighting devices, fixed lighting devices, lighting device components, etc., can solve the problems of poor brightness enhancement effect of dual-view display, and achieve good brightness enhancement effect

Inactive Publication Date: 2014-08-20
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a light guide plate, a dual-view backlight module and a dual-view display device to solve the technical problem of poor brightness enhancement effect of the dual-view display in the prior art

Method used

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  • Light guide plate, double-vision backlight module and double-vision display device
  • Light guide plate, double-vision backlight module and double-vision display device
  • Light guide plate, double-vision backlight module and double-vision display device

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Effect test

Embodiment 1

[0048] Embodiment 1 of the present invention provides a dual-view backlight module, see Figure 7 , including a laser light source 6, a dichroic prism group 7, a cylindrical lens 8, a third concave lens 9, a polygonal mirror 10, a curved mirror 11, and a light guide plate 1, wherein the light guide plate 1 includes a V-shaped groove 2 and a Gaussian scattering film 3, First concave lenses 4 can also be arranged on both sides. The laser light source 6 , dichroic prism group 7 , lenticular lens 8 , third concave lens 9 , polygonal reflector 10 and curved reflector 11 in the first embodiment together form the incident unit 5 in the first embodiment.

[0049] In the present embodiment 1, the laser light source 6 adopts monochromatic light sources of three different colors of RGB, see Figure 8, the emitted light rays pass through the dichroic prism group 7 and then converge into a beam of light that enters the lenticular lens 8 . There are two total reflection prisms and two bea...

Embodiment 2

[0054] Embodiment 2 of the present invention provides a dual-view backlight module using a fly-eye lens system, see Figure 12 , compared with Embodiment 1, Embodiment 2 of the present invention splits the beams of light through the cylindrical lens 12, the second concave lens 13, and two fly-eye lenses 14, 15, focuses them separately, and then collimates them to exit, and then utilizes the curved surface The mirror 16 effectively guides the light beam into the light guide plate 1 , making it incident on the V-shaped groove 2 on the lower surface of the light guide plate 1 . The structure of Embodiment 2 can effectively split and collimate the light beams, and the collimation effect is much better than simply collimating with lenses. In addition, in this embodiment, the total reflection prism 17 can also be used to reflect the light beam emitted by the laser light source 6 and change the direction of the light beam.

Embodiment 3

[0056] Embodiment 3 of the present invention provides a dual-view backlight module using a Lambertian light distribution light source, see Figure 13 , compared with Embodiment 1, this embodiment utilizes the point light source 18 with Lambertian light distribution to collimate the divergent light emitted by the point light source 18 through the optical collimator 19, and after passing through the optical collimator 19, it becomes As a surface light source, it enters the refracting prism 20 in the form of parallel light. The refracting prism 20 deflects the light and sends it into the light guide plate 1 to realize the side lighting of the V-shaped groove 2. When both sides are illuminated at the same time, a dual-view backlight is realized.

[0057] The alignment effect of this structured light is worse than that of Embodiment 1 and Embodiment 2, and the phenomenon of stray light is more serious, but the structure is simple and compact, which can save a large space.

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Abstract

The invention provides a light guide plate, a double-vision backlight module and a double-vision display device. The lower surface of the light guide plate comprises at least one V-shaped groove, wherein the V-shaped groove is used for reflecting light entering the lower surface of the light guide plate from the side faces of the light guide plate to the upper surface of the light guide plate through the side faces of the at least one V-shaped groove and enabling the light to be reflected outwards. Light reflected from the two sides can be respectively refracted by means of the V-shaped groove in the light guide plate, so that the light reflected from the upper surface of the light guide plate forms double-vision backlight, the brightening effect is good and is 1.5 to 2 times that of the prior art, and the light guide plate can be applied to manufacturing double-vision displayers with high brightness.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a light guide plate, a dual-view backlight module and a dual-view display device. Background technique [0002] The dual-view display is mainly used in a limited space. It can use a single screen to realize the function of different viewing angles and different images. Since the dual-view display realizes the display functions of two displays through one display, it can greatly save cost and practical space. This type of display is mostly used in vehicle display devices. For the basic requirements of dual-view displays on display angles, see figure 1 , Its viewing angle range is 22.5-45 degrees, and the center of the field of view is preferably 30 degrees. The specific situation depends on the requirements of the backlight panel. [0003] The backlight module of the dual-view display in the prior art can use a lower prism, but the brightness enhancement effect of the lower pri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/00F21S8/00F21V8/00F21V7/04G02B17/08
CPCG09G3/3406G02B3/0006G02B3/06G02B5/04G02B5/10G02B6/003G02B6/0031G02B6/0038G02B6/0051G02B6/0066G02B6/0068G02B26/12G02B26/126G02B27/123G02B27/126G02B27/30
Inventor 王尚
Owner BOE TECH GRP CO LTD
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