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Chemically strengthened glass for display device

A display device and tempered glass technology, applied in transportation, packaging, and thin material handling, etc., to achieve the effect of excellent appearance and practicability, high transparency, and less light leakage

Active Publication Date: 2013-12-04
ASAHI GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The above-mentioned problems related to color tone exist in the glass obtained by chemically strengthening the normal glass as mentioned above, but in the chemically strengthened glass plate used as the cover glass of mobile devices in recent years, there is glass with very high transparency, Thus it can be said that the problem described has been solved

Method used

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  • Chemically strengthened glass for display device

Examples

Experimental program
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Effect test

Embodiment

[0147] The following glass plates are prepared by slowly cooling molten glass to room temperature, followed by cutting, chipping, double-sided mirror grinding, etc.:

[0148] The composition expressed in mol% is SiO 2 : 64.5%, Al 2 o 3 : 6.0%, Na 2 O: 12.0%, K 2 O: 4.0%, MgO: 11.0%, CaO: 0.1%, SrO: 0.1%, ZrO 2 : In 100 parts by mass of matrix glass at 2.5%, Fe is contained in the ratio shown in parts by mass in the corresponding column of Table 1 2 o 3 , NiO, CoO Examples 1, 3-5, 7, 10, 16, 17, 20-22, 28 glass plates (thickness 4mm, 0.7mm, etc., size 50mm×50mm, etc.).

[0149] It should be noted that, in Table 1, the numerical values ​​expressed in parts by mass per 100 parts by mass of matrix glass are equal to the numerical values ​​expressed in % by mass. For example the Fe of Example 1 2 o 3 0.20% by mass. In addition, SnO 2 , Sb 2 o 3 The contents are all below the detection limit, less than 0.01% by mass.

[0150] Then, a glass plate with a thickness of 0.7...

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Abstract

The present invention relates to a chemically strengthened glass for a display device in which the visible light transmittance (Tva) obtained at a thickness of 1 mm using a light source (A) is 50% or higher and less than 91%, and the excitation purity (Pe) at a thickness of 1 mm is less than 0.5.

Description

technical field [0001] The present invention relates to a glass plate used for a cover glass of a display device, typically a cover glass of a small display device such as a mobile phone, a personal digital assistant (PDA), or a touch panel. Background technique [0002] In recent years, a large number of protective glasses (protective glass) are used for mobile devices such as mobile phones and PDAs to protect displays and improve appearance. On the other hand, such portable information devices are required to be lighter and thinner. Therefore, the cover glass used for display protection is also required to be thinned. [0003] However, there is a problem that when the thickness of the cover glass is reduced, the strength is lowered, and the cover glass itself may be broken by being dropped during use or carrying, and the original function of protecting the display device cannot be achieved. [0004] In order to solve the above-mentioned problems, it is conceivable to inc...

Claims

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Application Information

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IPC IPC(8): C03C3/087C03C3/085C03C3/091C03C3/093C03C21/00
CPCC03C21/002C03C3/085C03C21/00Y10T428/315C03C3/087C03C3/091C03C3/093
Inventor 小池章夫岛田勇也斋藤勋
Owner ASAHI GLASS CO LTD
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