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Polarizing optics

A technology for polarizing devices and lighting devices, applied in lighting devices, fixed lighting devices, components of lighting devices, etc., can solve problems such as limited utilization of light, and achieve the effect of improving utilization and high utilization of light

Inactive Publication Date: 2009-11-18
SUNA DISPLAY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even in such a traditional reprocessing structure, the utilization of light is still very limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as figure 2 As shown, the figure includes a light source 201, a light guide plate 203, and a polarizer between the light source and the light guide plate. Before the light enters the small-area surface of the light guide plate, it has been polarized through the polarizing beam splitter 202, thus reducing the size of the polarizing beam splitter.

[0037] The light guide plate 203 has light redirecting structures on the large area surface 2032A of the light guide plate. This structure maintains the polarization of the light and guides the passing light to exit the light guide plate through the large area surface 2032B.

[0038] In addition, the light source may have a structure such as a reflector 2010 or a collimator to enable the light to be directed towards the light guide plate.

Embodiment 2

[0040] image 3 Further descriptions are provided for preferred embodiments of the present invention. image 3 Among them, 301 is a light source, 303 is a light guide plate, 302 is a polarizing device composed of multiple polarizing beam splitters such as 3021, 3022 and so on. The polarizing device is disposed between the light source 301 and the light guide plate 303 . The light emitted from the light source 301 enters the light guide plate after being polarized by the polarizing device 302 .

[0041] In an optimal embodiment, the polarizing device 302 can also place an optical active element 3023 between the polarizing beam splitter 3022 and the light guide plate 303 .

[0042] In an optimal embodiment, the light guide plate 303 includes a small-area surface 3031 and a large-area surface 3032 . Light exits the polarizing beam splitter, enters the light guide plate from face 3031 , and exits the light guide plate from face 3032 .

[0043] In a preferred embodiment, the po...

Embodiment 3

[0046] Figure 4 More details are provided for an optimized embodiment and an optimized operation for the present invention. The light source includes at least one light emitting element 4011 . The polarizing device has a plurality of polarizing beam splitters 4021 and 4022 and an optical element 4023 . The light 407 output from the light emitting element 4011 is directed to a polarizing beam splitter 4021 . The polarizing beam splitter 4021 splits the light beam 407 into two mutually orthogonal light beams 408 and 409 . At this point, beam 408 is emitted with one polarization and beam 409 is reflected by 4021 and is polarized orthogonal to 408 . Polarizing beam splitter 4021 is positioned to act to reflect beam 409 to a second polarizing beam splitter 4022 such that polarizing beam splitter 4022 is able to reflect beam 409 . The light beam 409 has the same polarization state as the light beam 410 after being reflected by the polarizing beam splitter 4022 . Before beam 41...

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PUM

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Abstract

The invention discloses a polarizing optics, comprising a light source, a light panel. The light panel comprises a panle made of optical material. The light emitting device comprises at least two polarizing devices arranged between the light source and the light panel. The polarizing device divides light beam in light beam space emitted from light source into two crossed polarizing light beams. In particular in flat panel, light can enter into polarizing device before entering into large-area guiding device to improve use ratio of light material.

Description

technical field [0001] The invention relates to a light polarizing device in the field of light source polarization, in particular to a structure and method for manufacturing a polarized light source required by a liquid crystal display device. Background technique [0002] Currently, light sources used in flat panel displays must first be distributed through a light guide device to illuminate the entire display area. The light then passes through a polarizing film equal in area to the display. For example: if figure 1 As shown, the reflection device 102 reflects the light source 101 to the light guide plate 103 . The structure 104 is installed on one side of the light guide plate 103, and a reflective layer is placed behind this surface to guide the light through the light guide plate towards the opposite side of the light guide plate, from where the light is emitted and illuminates the entire display screen. Such as figure 1 As shown, the light rays 111 and 112 emitted...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S8/00F21V9/14F21V8/00G02F1/13357G02F1/133F21Y101/02G02F1/1335
CPCG02B6/0056G02B6/0031G02B6/0023
Inventor 李丰徐刚梁秉文
Owner SUNA DISPLAY