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Surface relief sheet, screen, image display system and transfer roller

A technology of surface concavo-convex and transfer roller, which can be used in instruments, projection devices, optics, etc., and can solve problems such as image brightness reduction

Active Publication Date: 2022-07-19
OJI HLDG CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, existing screens reflect / diffuse image light in various directions, so images are also displayed in directions where the observer normally does not exist
Therefore, in the conventional screen, the brightness of the image displayed in the direction where the observer is present decreases.

Method used

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  • Surface relief sheet, screen, image display system and transfer roller
  • Surface relief sheet, screen, image display system and transfer roller
  • Surface relief sheet, screen, image display system and transfer roller

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0261] Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited to these.

[0262] (Average depth of concave lines of transfer roller)

[0263] The average depth of the concave lines of the transfer roller was obtained as follows.

[0264] The surface unevenness of the transfer roller was measured using a laser microscope (VK-8500, manufactured by KEYENCE) with an objective lens of 50 times and a measurement pitch of 0.1 μm. Then, as Figure 8As shown, the cross-sectional shape corresponding to the cross-section when the vicinity of the surface of the transfer roller is cut along the direction orthogonal to the extending direction of the grooved lines 102 and toward the center of the transfer roller is measured. The depth D1 from the top 103a of one of the convex lines 103 adjacent to the concave line 102 to the bottom 102a of the concave line 102 is measured. Similarly, the depth D2 from the top 103a of ...

manufacture example 1

[0318] (Refer to coating liquid for light diffusing sheet)

[0319] A coating liquid for a reference light-diffusing sheet of the following composition was prepared.

[0320] Acrylic resin (100% non-volatile content, glass transition temperature 105°C, weight average molecular weight 600,000): 8 parts by mass,

[0321] Cross-linked polystyrene (polystyrene) particles (manufactured by Sekisui Chemical Industry Co., Ltd., SBX-6, average particle diameter 6.4 μm, no glass transition temperature): 13.2 parts by mass,

[0322] Cross-linked polystyrene particles (manufactured by Sekisui Chemicals Co., Ltd., SBX-12, average particle diameter 11.7 μm, no glass transition temperature): 9.6 parts by mass,

[0323] Cross-linked polystyrene particles (manufactured by Sekisui Chemical Industry Co., Ltd., SBX-17, average particle diameter 16.1 μm, no glass transition temperature): 1.2 parts by mass,

[0324] Toluene: 68 parts by mass.

[0325] (Refer to Light Diffuser Sheet)

[0326] On...

Embodiment 1

[0330] (transfer roller)

[0331] On the surface of the roller body whose surface material is copper, a ytterbium fiber laser (manufactured by IPG Photonics) attached to the laser engraving device was used. The beam diameter of the laser was 2.8 μm, the laser output was 200 W, the laser pulse A plurality of concave lines extending in the circumferential direction of the roller body were engraved under the condition of a roller peripheral speed of 45 cm / s.

[0332] Water cleaning (pure water, 25 kHz ultrasonic cleaning) was performed on the roller body engraved with a plurality of concave lines for 5 minutes. Next, after acid cleaning was performed at 50° C. for 12 minutes with an acid solution (aqueous sulfuric acid solution with a concentration of 10% (v / v)), an electroforming solution (nickel sulfamate (nickel sulfamate) 600 g / liter, nickel chloride 5 g) was used. / L, boric acid 40g / L, sodium naphthalene sulfonate 0.5g / L, sodium lauryl sulfate 1g / L), at liquid temperature 5...

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Abstract

The present invention provides a surface relief sheet, a screen including the surface relief sheet, an image display system including the screen, and a transfer roller for manufacturing the surface relief sheet, the surface relief sheet can obtain the relative front brightness of the displayed image A screen with high, left-right 60° luminance ratio and 100° luminance difference ratio with low color shift. The surface concave-convex sheet according to the present invention has a plurality of convex lines and concave lines formed between two adjacent convex lines on at least one surface, and in the surface concave-convex sheet, the average height of the convex lines and the average interval between the convex lines The ratio (average height / average spacing) is 0.07 or more and 0.40 or less, and the average roughness is 0.10 μm or more and 0.90 μm or less according to the roughness curve in the extending direction of the convex lines at the top of the convex lines. The direction perpendicular to the extending direction and the height data of the cross-sectional shape when the surface uneven sheet is cut in the thickness direction is calculated by calculating the inclination angle to calculate the frequency of the inclination angle, and the frequency ratio is calculated from the frequency of the inclination angle to be 98% or more .

Description

technical field [0001] The present invention relates to a surface concave-convex sheet, a screen including the surface concave-convex sheet, an image display system including the screen, and a transfer roller for manufacturing the surface concave-convex sheet. Background technique [0002] For a reflective screen, it is required that an image with high luminance (gain) and little difference in luminance can be displayed to all observers viewing the screen. Conversely, the screen need not display a high-brightness image, or, in extreme cases, no image, in directions where the observer is generally not present. For this reason, it is necessary to suppress reflection and diffusion of image light in a direction in which an observer is not usually present. [0003] As a conventional reflection-type screen, a reflection-type screen in which a reflection layer is provided on the back surface of a light-diffusion sheet having a light-diffusion layer in which particles are dispersed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/02B29C59/04G03B21/60
CPCB29C59/04G03B21/60G02B5/02G02B5/0215G02B5/0294
Inventor 铃木茂
Owner OJI HLDG CORP
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