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Optical element, and illuminating optical device, display device and electronic device using the same

一种光学元件、显示装置的技术，应用在光学元件领域，能够解决用户不快、许不希望的第三方等问题

Active Publication Date: 2008-04-02
NEC LCD TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of certain devices, such as mobile phones where personal privacy is assumed to be required, the wide viewing screen may sometimes allow an unwanted third party to view the displayed information, which may upset the user.

Method used

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  • Optical element, and illuminating optical device, display device and electronic device using the same
  • Optical element, and illuminating optical device, display device and electronic device using the same
  • Optical element, and illuminating optical device, display device and electronic device using the same

Examples

Experimental program
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Embodiment Construction

[0073] (first exemplary embodiment)

[0074] FIG. 9 is a schematic diagram showing a periodic structure of microwindows according to the first exemplary embodiment of the optical element of the present invention. Fig. 10 is a cross-sectional view of a microwindow.

[0075] As shown in FIG. 10 , the microwindow of this exemplary embodiment is constructed in such a way that a periodic structure body in which light absorbing layers 10 and transparent layers 11 are alternately arranged is sandwiched and held between two transparent substrates 12 and Between 13. As shown in FIG. 9 , the periodic structure body has a plurality of periodic structures 1 to 5 . In each of the periodic structures 1 to 5, the repetition period PI in the section including the light absorbing layer 10 and the transparent layer 11 is the same. The period PI corresponds to the pitch P in the section including the light absorbing layer 10 and the transparent layer 11 as shown in FIG. 10 . In addition, the...

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Abstract

A microlouver includes a periodic structure in which a transparent layer and a light absorption layer are alternately disposed with a constant, repetitive period. The range of the exit direction of a light beam passing through the transparent layer is restricted by the light absorption layer. The periodic structure includes a periodic structure portion divided in the direction that intersects the direction in which the transparent layer and the light absorption layer are repeatedly disposed. In the periodic structure portion, between the periodic structures adjacent to each other, there is a difference of 180 degree in the phase of spatial frequency of each periodic structure.

Description

technical field [0001] The present invention relates to optical elements known as "microlouver" by means of which the extent of the exit direction of a transmitted light beam is limited. In addition, the present invention relates to an illumination optical device using such an optical element and a display device typified by a liquid crystal display (LCD) or a plasma display. Background technique [0002] Liquid crystal displays are used as various electronic devices such as mobile phones, personal digital assistants (PDAs), ATMs (automatic teller machines), or personal computers, and in recent years there is practical use for liquid crystal displays having a wide viewable area. use. [0003] Liquid crystal displays whose display area is viewable from a wide range of angles have been found useful when multiple people are viewing a display screen together. However, in the case of certain devices, such as mobile phones, where personal privacy is assumed to be required, the w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/00G02F1/13357G02F1/1335H01J17/49G09F9/00G02B5/02
CPCG02F2001/133607G02B5/003G02F1/133606G02B5/201G02F1/1323G02F1/133607G02F1/1335
Inventor 三村广二住吉研
Owner NEC LCD TECH CORP
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