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Self-luminous image display device

An image display device and self-illumination technology, which is applied in the direction of identification devices, lighting devices, electroluminescent light sources, etc., can solve the problems of insufficient suppression of internal reflected light, etc., and achieve the effect of good black display ability and good image display

Pending Publication Date: 2022-05-10
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in such a conventional self-luminous image display device, when viewed from an oblique direction, a phenomenon called light leakage, that is, suppression of internally reflected light within the screen, may occur depending on the orientation of the observed screen. insufficient area

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0221] Prepared by coating a composition (light-diffusing adhesive) in which an adhesive (acrylic adhesive) mainly composed of an acrylic base polymer and light-transmitting fine particles is coated on a separator. Light diffusing adhesive layer (14). The internal haze of the light-diffusing adhesive layer was 75%. The circularly polarizing plate (5) obtained by the above operation was bonded on the light-diffusion adhesive layer (14) with the horizontal orientation film side, and the circularly polarizing plate with a light-diffusion adhesive layer was obtained.

[0222] The resulting circular polarizing plate (6) with a light-diffusing adhesive layer is cut out into a rectangle with a long side of 153 mm and a short side of 78 mm, and the release film is peeled off to expose the light-diffusing adhesive layer (14), which is bonded to a light-reflecting surface. layer (6) to make a sample, after measuring the reflected light of the sample, the intensity L of the reflected li...

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Abstract

The invention provides a self-light-emitting image display device which can suppress light leakage of internal reflected light when a screen is observed from any one direction in an inclined direction. In this self-luminous image display device (100), a circular polarizing plate (5), which is provided with a polarizing film (10) and a retardation film (2), is laminated on a light-reflective self-luminous image display element (16) on the retardation film (2) side with a light diffusion layer (14) therebetween. The light-diffusing layer (14) may be a light-diffusing adhesive layer. The phase difference film (2) may comprise a first phase difference film (20) having the characteristics represented by formula (1) and formula (3), and a second phase difference film (21) having the characteristics represented by formula (4). The first phase difference film (20) may further have the characteristics represented by formula (2). Nx > ny is approximately equal to nz (1); roA (450) / RoA (550) < = 0.93 (2); roA (550) is more than 135 nm and less than 145 nm (3); nx = ny < nz (4).

Description

technical field [0001] The invention relates to a self-luminous image display device. Background technique [0002] As a self-luminous image display device that displays an image using its own light emission, there is known a display device that includes a self-luminous image display element such as an organic EL (electroluminescence) image display element, and a circularly polarizing plate disposed on the front side thereof. device. Inside the self-luminous image display element, in addition to the light-emitting element, electrodes for transmitting electrical signals for image display, color filters for adjusting the color of emitted light, and the like are arranged. These electrodes and the like sometimes reflect external light incident from the front side of the image display element toward the front side. Since internally reflected light reflected from the inside toward the front side reduces the visibility of displayed images, a circularly polarizing plate is usually...

Claims

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Application Information

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IPC IPC(8): G02B5/30C09J7/29
CPCG02B5/305G02B5/3083C09J7/29C09J2203/326H10K59/8792B32B7/023G02B5/30G09F9/00G09F9/30H05B33/02G02B5/02B32B2307/42
Inventor 加藤早纪
Owner SUMITOMO CHEM CO LTD
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