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Diffuser with base coat and manufacturing method thereof, laminated optical component, surface light source device and liquid crystal display device

A technology of a light diffusion plate and a manufacturing method, which is applied to optical elements, optics, lighting devices, etc., and can solve problems such as increased equipment costs, decreased productivity, and easy retention of primer liquid

Inactive Publication Date: 2009-09-23
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] On the other hand, when the undercoat layer is formed by a general coating method of applying the primer liquid on the uneven surface from the upper side in the state where the uneven surface of the light diffusion plate is directed upward, it can be seen that the undercoat liquid It is easy to stay on the bottom (recess) of the uneven surface of the light diffusion plate, and sometimes the air layer (air part) cannot be sufficiently formed between the light diffusion plate and the optical film, which may contribute to the improvement of the adhesive strength. When a sufficient amount of primer liquid cannot be applied to the convex portion (protrusion tip portion) of the uneven surface
[0012] In addition, since the primer liquid is usually a solvent-containing liquid, it can be seen that when it is applied to a light diffusion plate, a drying process for drying the solvent of the primer liquid may be required separately, resulting in a decrease in productivity. Drying equipment is required for drying, so equipment costs may increase

Method used

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  • Diffuser with base coat and manufacturing method thereof, laminated optical component, surface light source device and liquid crystal display device
  • Diffuser with base coat and manufacturing method thereof, laminated optical component, surface light source device and liquid crystal display device
  • Diffuser with base coat and manufacturing method thereof, laminated optical component, surface light source device and liquid crystal display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0153] (Manufacture of light diffusing agent masterbatch)

[0154] Styrene resin particles ("HRM40" manufactured by Toyo Styrene Co., Ltd., refractive index: 1.59) 54 parts by weight, acrylic polymer particles (cross-linked polymer particles, "Sumitomo XC1A" manufactured by Sumitomo Chemical, refractive index: 1.49, volume average particles 40 parts by weight of siloxane-based polymer particles (cross-linked polymer particles, Toray Dow Corning "Trefil DY33-719", refractive index 1.42, volume average particle diameter 2 μm) 4 parts by weight, heat stabilizer (Sumitomo Chemical Co., Ltd. "Sumiソライブ-200", powder form) 2 parts by weight, and processing stabilizer (Sumitomo Chemical Co., Ltd. "Sumila Iza-GP", powder form) 2 parts by weight dry-mixed, put into two parts from the hopper Using a shaft extruder, heat and melt while mixing, extrude at 250° C. into strands, and cut into pellets to obtain light diffusing agent masterbatch (granules).

[0155] (manufacture of coarse parti...

Embodiment 2

[0162] In addition to using 7.5 parts by weight of "Carbodilite V02-L2" (trade name) manufactured by Nisshinbo Co. Except for the primer liquid mixed, it carried out similarly to Example 1, and obtained the light-diffusion plate.

Embodiment 3

[0164] By melt extrusion transfer molding using an engraved roll (engraved roll), protruding and forming a plurality of cylindrical lens-shaped convex lines on the entire surface of one surface, thereby manufacturing a surface (31a) in which one surface is formed with concavities and convexities. A synthetic resin light diffusion plate (31) with a thickness of 2 mm (refer to Image 6 ). In this light diffusion plate (31), the height (H) of the approximately semicircular convex portion is about 100 μm, the distance (P) between adjacent approximately semicircular convex portions is approximately 230 μm, and the distance between adjacent approximately semicircular convex portions is about 230 μm. The groove width (E) of the flat surface was about 15 μm.

[0165]On the uneven surface (31a) of the light diffusion plate (31), apply the primer liquid with a bar coater (the type that forms a coating film with a wet thickness of about 30 μm), so that the surface of the light diffusion...

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Abstract

The invention relates to a diffuser with a base coat which can laminate optical films with adequate engaging force and a manufacturing method thereof with good production efficiency and low cost. The diffuser with a base coat is characterized by laminating the base coat on at least one face of the diffuser, and other optical films can be laminated on the diffuser with adequate adhesive strength through binder because the base coat is laminated on at least one face of the diffuser. The diffuser is suitable for being used as an optical diffuser for a surface light source device.

Description

technical field [0001] This patent application is based on Japanese Patent Application No. 2008-069858 (applied on March 18, 2008), Japanese Patent Application No. 2008-082528 (applied on March 27, 2008), and Japanese Patent Application No. 2008-082533 ( filed on March 27, 2008), claiming priority under the Paris Treaty, and by citing them here, the entirety of the contents described in each of the above applications constitutes a part of this specification. [0002] The present invention relates to a light-diffusing plate with a primer layer capable of laminating optical films and the like with sufficient adhesive force, and a method for producing the light-diffusing plate with high productivity and low cost. Background technique [0003] As a liquid crystal display device, for example, a configuration in which a surface light source device serving as a backlight is arranged on the rear side of a liquid crystal panel (image display unit) including a liquid crystal cell is k...

Claims

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Application Information

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IPC IPC(8): G02B5/02G02B1/10B32B7/12G02F1/13357F21V7/04
Inventor 金谷浩子金光昭佳森正春
Owner SUMITOMO CHEM CO LTD
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