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Reflective optical polarizer device with controlled light distribution and liquid crystal display incorporating the same

A polarizing device and reflective technology, applied in optics, polarizing elements, optical elements, etc., can solve the problem of not providing ambient light to illuminate liquid crystal display devices

Inactive Publication Date: 2004-02-04
MOXTEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For these reasons, the above solutions do not provide improved ambient light illuminated liquid crystal display devices while moving the polarizer and reflector into the liquid crystal cell to eliminate the parallax problem

Method used

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  • Reflective optical polarizer device with controlled light distribution and liquid crystal display incorporating the same
  • Reflective optical polarizer device with controlled light distribution and liquid crystal display incorporating the same
  • Reflective optical polarizer device with controlled light distribution and liquid crystal display incorporating the same

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Embodiment Construction

[0050] Referring now to the drawings, in which the various elements of the invention are given a number, and the invention will be discussed to enable one of ordinary skill in the art to make and use the invention.

[0051] In order to illustrate the features of the present invention, an improved ambient lighting, or reflective twisted nematic liquid crystal display will be described. However, it will be apparent from reading the specification that the present invention is not limited to application to this display. FIG. 1 is a schematic cross-sectional view of a conventional reflective twisted nematic liquid crystal display 10 . The display comprises a liquid crystal layer 11 sandwiched between a first transparent plate 12 and a second transparent plate 13 . Each of these plates 12 and 13 has one or more transparent electrodes 14 and 15 deposited on the surface of the plate 12 or 13 respectively adjacent to the liquid crystal material 11 . The first polarizer 16 is located ...

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Abstract

An optical polarizer device (45) that reflects light of one polarization over a controlled angular range, and improved twisted nematic liquid crystal display devices (60) incorporating the same, is comprised of a grid of conductive elements (46) supported on a textured substrate such that light of one polarization is transmitted through the grid while light of the orthogonal polarization is reflected. The angular distribution of the reflected light is determined by the texture of the substrate. Liquid crystal display embodiments include a configuration intended exclusively for front illumination by ambient light and a configuration which may use either front-illumination or back-illumination by an internal light source.

Description

technical field [0001] The present invention relates to a diffuse and non-specularly reflective polarizing device particularly suitable for use in liquid crystal displays. In particular, the invention relates to a polarizing device. Background technique [0002] A typical liquid crystal display device includes a layer of liquid crystal material sandwiched between front and rear transparent plates. The transparent electrodes are located on the inner surface of the transparent plate and are used to apply electrical signals that change the light transmittance of the liquid crystal layer. The transparent electrodes are generally patterned to define the pixel structure of the display device. [0003] The preferred and most common form of liquid crystal display is the known "twisted nematic" liquid crystal effect. The nematic effect of the twisted arrangement is the best, because it provides the best contrast ratio, low drive voltage compatible with current drive circuit techno...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/30G02F1/1335G02F1/1343
CPCG02F2001/133548G02F1/133536G02F2001/133567G02F2203/03G02F1/13439G02F1/133553G02F1/133548G02F1/133567G02F1/1335
Inventor 道格拉斯·P·汉森约翰·冈瑟
Owner MOXTEK INC