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Display device containing corner reflector array

A reflector array, display device technology, applied in instruments, electrical components, optical components, etc., can solve problems such as parallax

Inactive Publication Date: 2003-07-16
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the display device disclosed in U.S. Patent No. 5,182,663, transparent pixel electrodes are also provided above the reflector, thus causing the above-mentioned parallax and other problems

Method used

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  • Display device containing corner reflector array
  • Display device containing corner reflector array
  • Display device containing corner reflector array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Figure 4 A configuration of a reflective liquid crystal display device according to a first specific preferred embodiment of the present invention is shown. Such as Figure 4 As shown, the reflective liquid crystal display device 100 includes a transparent front-side base layer 1 followed by a color filter 9 and a transparent counter electrode 8 , and the device 900 also includes a back-side base layer 2 placed facing the front-side base layer 1 . A scattering type liquid crystal layer 30 is arranged between the base layers 1 and 2 as a light modulation medium layer, which switches between a scattering state and a transmission state. On one surface of the rear base layer 2, several thin film transistors (TFTs) as switching elements facing the liquid crystal layer 30, an interlayer dielectric film 5c (its surface defines a corner reflector array 10) and a reflective electrode layer 14. The reflective electrode layer 14 includes a plurality of reflective electrodes 12 ...

Embodiment 2

[0093] A second specific preferred embodiment of the present invention relates to a reflective electrode arrangement that can be effectively applied to situations where the width of the non-reflective area is much smaller than the pitch of the corner reflectors.

[0094] Figure 11 A portion of the non-reflective area (or inter-pixel area) 16 according to the second preferred embodiment is shown. Such as Figure 11 As shown, the non-reflective areas 16 are arranged so as to overlap the highest layer point ○ of the corner reflector, rather than the lowest layer point ● as in the first preferred embodiment described above. Furthermore, a non-reflective area 16 is provided along the edge of the corner reflector. As used herein, the "edge" of a corner reflector refers to the intersection of multiple planes (in this preferred embodiment, three planes that are substantially perpendicular to each other) that combine to form the recessed portion . That is to say, the "edge" here i...

Embodiment 3

[0110] A third specific embodiment of the present invention involves forming Figure 4 The process steps of the contact hole 7 in the display device 100 shown in the first preferred embodiment of the present invention, the contact hole 7 electrically connects the reflective electrode 12 on the interlayer dielectric film 5c to the electrode below the interlayer dielectric film 5c. Electrode 6. In the display device 100 comprising the combination of the micro-corner reflector array 10 and the scattering type liquid crystal display layer 30, the contact holes 7 will minimize the reduction of the aperture ratio due to their appearance; 12 and the electrode 19 (such as the drain 6 of the TFT 4) under the interlayer dielectric film 5c are disconnected and electrically connected together as expected.

[0111] In order to minimize the reduction in aperture ratio due to the presence of contact holes 7, the process steps to pattern the contact holes 7 should not affect more than one co...

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PUM

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Abstract

A display device includes a light modulating medium layer, a corner cube array and a reflective electrode layer. The corner cube array is provided on one side of the light modulating medium layer and includes multiple corner cubes as its unit elements. The reflective electrode layer is provided on the corner cube array and includes multiple reflective electrodes that are spaced apart from each other and that are used to apply a voltage to the light modulating medium layer. When the display device is viewed from over the corner cube array, an arrangement pattern of the corner cubes matches an arrangement pattern of the reflective electrodes in at least one direction.

Description

technical field [0001] The invention relates to a display device comprising an array of corner reflectors. Background technique [0002] Reflective liquid crystal display devices for performing display operations by using ambient light as their light source are known in the art. Unlike a transmissive liquid crystal display device, a reflective liquid crystal display device does not require a backlight, thus saving power consumption for a light source and allowing users to carry a smaller battery. In addition, the space reserved for the backlight in the transmissive device can be saved, and the weight of the device itself can be reduced. For this reason, reflective liquid crystal display devices can not only be effectively applied to various types of mobile electronic units that should be as light and thin as possible, but also make it possible for units including reflective display devices to be designed with and including transmissive devices. A larger battery can be used...

Claims

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Application Information

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IPC IPC(8): G02B5/124G02F1/1335G02F1/13357G02F1/1343G09F9/30G09F9/35H05B33/24
CPCG02F1/133553G02B5/124G02F1/134309G02F1/00
Inventor 澤山豊箕浦潔伊原一郎谷口幸治藤原小百合
Owner SHARP KK
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