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Optical slice and backlight unit using it

An optical sheet and optical layer technology, applied in optical elements, optics, nonlinear optics, etc., can solve the problems of insufficient prevention of optical sheet damage and insufficient adhesion performance, achieving high anti-adhesion function, easy installation, Damage prevention effect

Active Publication Date: 2011-05-25
KEIWA INCORPORATED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, even in the optical sheet provided with the above-mentioned damage prevention layer, due to the presence of tiny beads for preventing adhesion, damage to other optical sheets cannot be sufficiently prevented. Damage to flakes, etc.
In addition, in the case where the anti-blocking curable resin composition is used to form irregularities on the surface, if the surface irregularities are too small, the adhesion prevention performance will be insufficient. In addition, if the above-mentioned anti-blocking curable resin composition is used to improve the brightness of the optical sheet. When the coating film of the curable resin composition that sticks to the block is thinner, the unevenness formed becomes finer, and the anti-adhesion performance becomes more insufficient

Method used

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  • Optical slice and backlight unit using it
  • Optical slice and backlight unit using it
  • Optical slice and backlight unit using it

Examples

Experimental program
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Effect test

Embodiment

[0087] The present invention will be described in detail below based on the examples, but the present invention should not be limitedly interpreted based on the description of the examples.

Synthetic example 1

[0088] (Synthesis Example 1 [Synthesis of Unsaturated Double Bond-Containing Acrylic Copolymer (A-1)])

[0089] 100 parts by mass of propylene glycol monomethyl ether was placed in a 2 L reaction container equipped with a stirrer, a thermometer, a nitrogen introduction tube, a cooler, and a dropping funnel, and nitrogen substitution was performed, followed by heating to 110°C. Next, a mixture consisting of 50 parts by mass of isobornyl methacrylate, 1 part by mass of methyl methacrylate, and 3 parts by mass of methacrylic acid, and tert-butyl peroxide as a polymerization initiator were dropped at the same time for three hours. A mixture consisting of 0.5 parts by mass of 2-ethylhexanoate and 20 parts by mass of propylene glycol monomethyl ether. After completion of the dropping, the reaction was carried out at 110° C. for 1 hour. Then, a mixture consisting of 0.1 parts by mass of t-butyl peroxy-2-ethylhexanoate and 5 parts by mass of propylene glycol monomethyl ether was dr...

Synthetic example 2

[0091] (Synthesis Example 2 [Synthesis of Acrylic Copolymer (A-2)])

[0092] 100 parts by mass of propylene glycol monomethyl ether was placed in a 2 L reaction container equipped with a stirrer, a thermometer, a nitrogen introduction pipe, a cooler, and a dropping funnel, and nitrogen substitution was performed, followed by heating to 110°C. Next, a mixture consisting of 50 parts by mass of isobornyl methacrylate, 1 part by mass of methyl methacrylate, and 3 parts by mass of methacrylic acid, and tert-butyl peroxide as a polymerization initiator were dropped at the same time for three hours. A mixture consisting of 3 parts by mass of 2-ethylhexanoate and 20 parts by mass of propylene glycol monomethyl ether. It reacted at 110 degreeC for 30 minutes after completion|finish of dripping. Thus, an acrylic copolymer (A-2) was obtained. The number average molecular weight of the acrylic copolymer (A-2) was 3000, the weight average molecular weight was 5500, the SP value was 10....

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Abstract

The invention provides an optical slice and a backlight unit using the optical slice, wherein the optical slice can prevent adhesion with other optical slices laminated at the back side of the slice, and can also prevent damages to surfaces of other optical slices and the like. The optical slice of the invention comprises a transparent matrix material layer, an optical layer laminated on one sideof one surface of the matrix material layer, and an adhesion-preventing layer laminated on one side of the other surface of the matrix material layer, wherein the whole surface of the adhesion-preventing layer has a micro concave-convex shape and the adhesion-preventing layer is composed of various phase-separation resins and has a double-island structure which has a regional phase dispersed in amatrix phase and a granular phase dispersed in the regional phase. The main material in the matrix of the adhesion-preventing layer is urethane (methyl) acrylate resin; the main material of the regional phase is (methyl) acrylate resin; and the main material of the granular phase is (methyl) acrylate resin.

Description

technical field [0001] The present invention relates to an optical sheet and a backlight unit using the optical sheet, the optical sheet has excellent functions of preventing adhesion and preventing damage. Background technique [0002] Liquid crystal display devices are widely used in screen display devices such as televisions and personal computers, and are mainly divided into direct-view type for directly viewing a display screen and projection type for viewing images projected on a screen. Direct-view liquid crystal display devices include a transmissive type that transmits light from a backlight, a reflective type that uses natural light and reflected light from indoor lights without a backlight, and a semi-reflective type that is reflective in bright places and transmissive in dark places. transmission type. On the other hand, projection-type liquid crystal display devices include a front type that projects an image onto a front screen and a rear type that projects a ...

Claims

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Application Information

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IPC IPC(8): G02B5/02G02B1/10G02F1/13357B32B27/14B32B3/30C08L75/14C08L33/00
Inventor 野中忠幸原田贤一
Owner KEIWA INCORPORATED
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