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Light-transmitting substrate provided with a light-absorbing coating

A light-absorbing coating, light-transmitting technology, applied in optics, light sources, filters, etc., can solve the problems of reduced blue transmittance, reduced red absorption, and low red coating transmittance.

Inactive Publication Date: 2005-11-30
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Clearly, it's a cost flaw
In addition, the reduction in the blue transmission of the coating also reduces the red absorption and therefore the effective light output of the lamp
For coatings including silver, the main drawback is the low transmission of the red coating, which is less than about 11%

Method used

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  • Light-transmitting substrate provided with a light-absorbing coating
  • Light-transmitting substrate provided with a light-absorbing coating

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] example 1 - Gold in MTMS / TEOS

[0026] The sol-gel hydrolysis mixture was obtained by mixing 4.3 g of ethanol, 40.0 g of methyltrimethoxysilane (methyltrimethoxy silane) (MTMS), 0.86 g of tetraethoxysilane (TEOS) and 0.14 g of water in 32.0 g of water. .1M acetic acid and subjecting the mixture to hydrolysis for 48 hours.

[0027] Fe 2 o 3 The dispersion is obtained by mixing 3g Fe 2 o 3 , 3g Dysperbyk-190, 7g water and 10g ethanol. And this dispersion was added to the sol-gel hydrolysis mixture and methoxypropanol in a ratio of 1:2:0.2. Spin-coating the resulting solution on a glass plate or spraying it onto a rotating glass shell will yield a 2 o 3 2 µm thick coating.

[0028] Subsequently, 1 g of Au particle dispersion comprising 25 wt% gold particles, 7 wt% polymer and 68 wt% ethanol was mixed with a sol-gel hydrolysis mixture similar to the above in a ratio of 1 to 2. The polymer used to stabilize the metal particles is a polystyrene-polycarbonate block ...

example 2

[0031] Example 2 -Silver in TEOTi

[0032] First, as in Example 1, a 2-micron-thick coating containing about 20vol.% Fe 2 o 3 silicon oxide layer.

[0033] A sol-gel hydrolysis mixture was prepared by mixing 20 g of ethanol, 3.3 g of tetraethoxytitanium (TEOTi) and 2.35 g of 0.1 M HCL (hydrochloric acid) and hydrolyzing the mixture for 48 hours.

[0034] Subsequently, 1 g of Ag particle dispersion including 17 wt % silver particles, 13 wt % polymer and 70 wt % ethanol was added to 2 g ethanol and 2.5 g of 10 wt % N-aminopropyltrimethoxysilane dissolved in ethanol. This solution was mixed with the TEOTi solution in a ratio of 1:2. The polymer used to stabilize the metal particles is a polystyrene-polycarbonate block copolymer.

[0035] A coating liquid was prepared by mixing the silver solution and the sol-gel hydrolysis mixture. The coating liquid was then spin-coated onto the Fe-containing 2 o 3 coated glass substrates and cured in air at a temperature of 350°C. The...

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Abstract

Disclosed is a light-transmitting substrate that is at least partly provided with a light-absorbing coating. Said coating comprises silver or gold particles that are incorporated in a sol-gel matrix. In order to improve the transmittance in red and to reduce the amount of silver and gold particles, a blue-absorbing compound is added to the coating. Furthermore, an electric lamp is disclosed, said lamp comprising a light-transmitting lamp vessel that accommodates a light source. Said lamp vessel comprises the above light-transmitting substrate. Moreover, a light-absorbing coating is disclosed.

Description

technical field [0001] The invention relates to a light-transmitting substrate at least partially equipped with a light-absorbing coating comprising silver and / or gold particles mixed in a sol-gel matrix. The invention also relates to an electric lamp comprising a light-transmissive lamp housing a light source, wherein said lamp comprises a light-transmissive substrate as described above. Furthermore, the invention also relates to the light-absorbing coating itself. Background technique [0002] Light-transmitting substrates equipped with a light-absorbing coating can be used as colored layers on or in front of (incandescent) lamps for general lighting purposes. The substrate may comprise, for example, a colored filter made of a piece of (flat or non-flat) glass, which is intended to be placed in the trajectory of the light generated by the lamp. Such a device is commonly used for outdoor lighting. Another example of a light transmissive substrate is a light tube placed o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/00F21Y101/00G02B5/20G02B5/22
CPCC03C17/009G02B5/22C03C17/005C03C17/007G02B5/206G02B5/20
Inventor A·R·巴肯恩德M·M·H·瓦格曼斯
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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