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Front plate for display, display device, and method and apparatus for manufacturing front plate for display

A manufacturing method and front panel technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve problems such as warping or undulation, and achieve the effect of suppressing disorder

Inactive Publication Date: 2011-09-21
ASAHI GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, warping or waviness may occur on the front panel after the heat treatment process.

Method used

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  • Front plate for display, display device, and method and apparatus for manufacturing front plate for display
  • Front plate for display, display device, and method and apparatus for manufacturing front plate for display
  • Front plate for display, display device, and method and apparatus for manufacturing front plate for display

Examples

Experimental program
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Effect test

Embodiment 1

[0228] Using the following method, a front panel having a ceramic layer provided on the peripheral portion of one surface of a glass substrate was actually manufactured, and the degree of in-plane stress-strain unevenness of the front panel was evaluated.

[0229] (Front Panel Fabrication)

[0230] The fabricated front panel had an antireflection film on the entire first surface of the glass substrate, and a ceramic layer on the entire peripheral portion of the second surface of the glass substrate. In addition, no antireflection film was provided on the second surface of the glass substrate.

[0231] The front panel is produced by the following method.

[0232] First, prepare a glass plate made of transparent soda lime silicate. This transparent glass panel has the following properties:

[0233]Thickness is 2.5mm, visible light transmittance Tv=90.2%, visible light reflectance Rv=8.2%, haze (turbidity)=0.06%, xy chromaticity coordinate x=0.307, y=0.314.

[0234] After cut...

Embodiment 2

[0280] The front panel of Example 2 was fabricated by the same method as in Example 1, and the degree of in-plane stress-strain unevenness of the front panel was evaluated.

[0281] However, in Example 2, the process of firing the ink for forming the ceramic layer and cooling the glass substrate is different from the above-mentioned Example 1.

[0282] That is, in Example 2, the baking treatment of the ink was carried out by keeping the glass substrate at an atmospheric temperature of 640°C for 280 seconds.

[0283] For heating, first, the glass substrate was transported to a heating zone maintained at 640° C. by an input conveyor. In the heating zone, the conveying direction of the conveyor belt is reversed at regular intervals. Thereby, the conveyance direction of a glass substrate is reversed periodically. The residence time of the glass substrate in the heating zone was set to 280 seconds. The surface temperature of the glass substrate immediately before the next proces...

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Abstract

The present invention relates to a front plate for display, a display device, and a method and an apparatus for manufacturing front plate for display. The front plate for a display comprises: a glass substrate having a first surface and a second surface; and a ceramic layer formed on at least a part of a marginal area of the second surface, wherein the front plate has a difference ([Delta]T) between a maximum light amount Tmax and a minimum light amount Tmin of transmitted light of 0.4% or smaller, wherein the light amount of transmitted light is measured in a measurement system comprising: a liquid crystal panel that is made to be of entire-surface white-light emission state and is emitting the white light with polarization; a polarizing plate that is set in a crossed Nicol condition with respect to the polarized white light emitted from the liquid crystal panel; and a brightness measurement device arranged in this order, wherein the front plate is disposed between the liquid crystal panel and the polarizing plate so that the second surface faces the liquid crystal panel, while setting the distance between the liquid crystal panel and the front plate to be 50 mm and the distance between the front plate and the brightness measurement device to be 1 m, and wherein the measurement of the transmitted light amount is carried out by measuring the light amount of light transmitted from through the front plate and the polarizing plate over the entire surface of the front plate by the brightness measurement device, and the light amounts in the absence of the front plate under a crossed Nicol condition and a parallel Nicol condition are taken as 0% and 100%, respectively.

Description

technical field [0001] The present invention relates to a front panel provided on the front surface of a display or the like. Background technique [0002] In FPD (Flat Panel Display) devices such as Liquid Crystal Display (LCD), Plasma Display Panel (PDP) and Organic EL (Electroluminescent) Display (OELD), which are applied to thin TVs, etc., the front surface of the display panel is also called Front panel made of glass called "front surface filter". The front panel is mainly provided to prevent the reflection of ambient light, increase the strength of the FPD, and prevent the FPD from being damaged by collision. In general, the front panel has an anti-reflection film on both sides. In addition, in order to increase the strength, the front panel is produced through a heating-cooling heat treatment process (strengthening process). [0003] However, warping, waviness, etc. may occur on the front panel after the heat treatment process. Therefore, it is disclosed that the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/22G02B1/10G02B1/11G02F1/13H01J17/49H01L27/32G02B30/25
CPCG02B27/26C03C8/14G02B5/0294C03C8/02C03C2218/119G01N21/958G02B5/0268G02B5/003C03C2218/365G02B30/25
Inventor 上川真佐竹英哉佐佐木宏二府川真多田真彦卫藤和夫
Owner ASAHI GLASS CO LTD