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High-reflectance visible-light reflector member, liquid-crystal display backlight unit employing the same

A technology of reflective components and reflectors, which is applied to optical components, vehicle parts, instruments, etc., can solve problems such as oxidation or vulcanization reactions, poor durability, and reduced reflectivity, and achieve reflectivity, excellent corrosion resistance, and high reflectivity rate effect

Inactive Publication Date: 2007-01-31
FUTURE VISION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be clearly seen that although the reflectance value of silver itself is high compared with that of aluminum, it is relatively low compared with the reflectance of silver at a wavelength of 550nm
In addition, silver has the disadvantage of poor durability compared with aluminum.
In other words, there is a problem that oxidation or sulfuration reactions are likely to proceed when exposed to the atmosphere, resulting in a decrease in reflectance

Method used

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  • High-reflectance visible-light reflector member, liquid-crystal display backlight unit employing the same
  • High-reflectance visible-light reflector member, liquid-crystal display backlight unit employing the same
  • High-reflectance visible-light reflector member, liquid-crystal display backlight unit employing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] refer to figure 1 The visible light reflector 100 according to the first embodiment of the present invention has a reflective layer 102 formed on the surface of a substrate 101 . The illustrated substrate 101 is formed of a plastic material (specifically, a cycloolefin polymer) having a thickness of 0.7 to 2 mm. The substrate is not limited to cycloolefin polymers, and metals, glass, ceramics, and other plastic materials can also be used. The size and thickness of the substrate are not specified, but considering the strength of the substrate, a substrate with a thickness of 40 μm or more is preferable if it has flexibility like resin. In the case of a metal, glass, or ceramic material, a substrate having a thickness of 100 μm or more is preferable. The substrate is formed of a plane or a curved surface. In order to define the directivity of light by its substantially flat or curved portion, the surface roughness is preferably 40 nm or less, more preferably 1 / 20 of th...

Embodiment 2

[0091] A second embodiment of the present invention will be described with reference to the drawings. In addition, descriptions of portions overlapping with the first embodiment are appropriately omitted.

[0092] refer to Figure 7 , The visible light reflection unit 700 according to the second embodiment of the present invention has a reflection layer 702 formed on the surface of a substrate 701 . The illustrated substrate 701 is formed of a plastic material (specifically, a cycloolefin polymer) having a thickness of 0.7 to 2 nm. A surface protection film 703 made of silicon nitride is formed on the reflective layer 702 .

[0093] The illustrated reflective layer 702 is a silver thin film having a (111) plane as its main plane orientation. Use of silver thin film with (111) plane as the main plane orientation figure 2 The shown RF-DC combined sputtering device forms a film. In this embodiment, xenon gas is used instead of argon gas during substrate surface cleaning and...

Embodiment 3

[0099] A third embodiment of the present invention will be described with reference to the drawings. In addition, descriptions of portions overlapping with the first and second embodiments are appropriately omitted.

[0100] Figure 12 The shown visible light reflection unit 1200 according to the third embodiment of the present invention has a reflection layer 1202 formed on the surface of a substrate 1201 . The illustrated substrate 1201 is formed of a plastic material (specifically, a cycloolefin polymer) having a thickness of 0.7 to 2 nm. A surface protection film 1303 made of silicon nitride is formed on the reflective layer 1202 .

[0101] The illustrated reflective layer 1202 is a silver thin film having a (111) plane as its main plane orientation. The silver film with the (111) plane as the main plane orientation, using figure 2 The shown RF-DC combined sputtering device forms a film. In this embodiment, after the substrate was sent to the processing chamber, argo...

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Abstract

A reflector member of the present invention includes a silver thin film formed on a substrate and a silicon nitride protection film formed on the silver thin film. The silver thin film has the (111) orientation as the principal plane orientation. Preferably, 99% or more of the silver thin film has the (111) orientation as the principal plane orientation. The thickness of the silver thin film is in a range of 100 nm to 350 nm.

Description

technical field [0001] The present invention relates to reflective members for reflecting visible light sources, in particular to visible light suitable as reflective plates for backlight (backlight) components of large flat liquid crystal displays with a screen diagonal of 28 inches or more or reflective members for rear projection televisions reflection widget. Background technique [0002] Reflectors used to reflect visible light sources include diffuse reflectors coated with white paint or diffused glass beads, metal polished plates, or thin-filmed reflectors in which metal atoms are laminated on a substrate. [0003] These visible light reflectors are widely used in various applications such as backlight components for liquid crystal displays, reflectors for rear projection TVs, reflectors for indoor fluorescent lamps, reflective layers for recording media such as CDs and DVDs, and reflectors for vehicles and indoors. in use. [0004] The advantage of the diffuse refl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/08G02F1/13357B60R1/02C23C14/34G02F1/1335
CPCC23C16/0281G02B5/0858C23C14/345C23C28/34C23C28/322C23C28/36C23C14/584C23C14/022G02B6/0055C23C14/205C23C16/345G02F1/1335
Inventor 大见忠弘后藤哲也关伸彰池田智新仓高一
Owner FUTURE VISION