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LCD with complementary heterogeneous polarizers for polarization light recycling

A polarizer, heterogeneous technology, applied in the direction of instruments, optics, nonlinear optics, etc., can solve the problems of power consumption, loss, etc.

Inactive Publication Date: 2009-12-02
杰格莫汉・巴拉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, one problem with known transmissive LCDs is that most of this power consumption is consumed in generating light that is ultimately not used in the display output due to being filtered.
As mentioned above, LCDs require the illumination to be linearly polarized and correctly oriented, which typically results in the loss of at least half of the available light from the backlight

Method used

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  • LCD with complementary heterogeneous polarizers for polarization light recycling
  • LCD with complementary heterogeneous polarizers for polarization light recycling
  • LCD with complementary heterogeneous polarizers for polarization light recycling

Examples

Experimental program
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Embodiment Construction

[0019] One embodiment of the present invention is an LCD having a non-homogeneous front polarizer and a complementary non-homogeneous rear polarizer to achieve substantially improved light output.

[0020] figure 2 is a cross-sectional view of a portion of an LCD 50 according to an embodiment of the present invention. figure 2 Only those elements directly involved in one embodiment are shown and other elements that may be used in combination (e.g., color filters, prism sheets, alignment layers, diffusers, other polarizing elements, other reflective elements, etc.) are not shown. ). The LCD 50 includes a backlight unit including a backlight (not shown) for generating unpolarized light; a rear reflector 14 for reflecting the light; and a light guide 30 for guiding and homogenizing the generated and reflected light. Rear reflective polarizer 48 polarizes non-homogeneously with alternating directional regions, where two directional regions are at figure 2 shown in (46 and 47...

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Abstract

An electro-optical display system includes a rear reflective heterogeneous polarizer having first and second regions. The first region transmits a first polarization state and reflects a second polarization state and the second region transmits the second polarization state and reflects the first polarization state. The system further includes a front heterogeneous polarizer having third and fourth regions. The third region is substantially aligned with and approximately the same size and shape as the first region and the fourth region is substantially aligned with and approximately the same size and shape as the second region.

Description

technical field [0001] One embodiment of the present invention relates to a liquid crystal display. More specifically, one embodiment of the present invention relates to a liquid crystal display with polarized light recycling. Background technique [0002] A liquid crystal display ("LCD") is a thin, flat display device consisting of any number of color or monochrome pixels arranged in front of a light source or reflector. It has many advantages over competing technologies because it uses very little power and because it is thin it is suitable for use in battery-operated electronics. [0003] Each pixel in an LCD consists of a layer of liquid crystal ("LC") molecules suspended between two transparent electrodes and sandwiched between two crossed linear polarizers (i.e., with transmissions perpendicular to each other). axis of the polarizer). In the absence of liquid crystals between the polarizers, light passing through one polarizer would be blocked by the other. The liq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1335
CPCG02F2001/133538G02F2001/133757G02F1/133536G02F1/133538G02F1/133757
Inventor 杰格莫汉·巴拉
Owner 杰格莫汉・巴拉