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Color conversion sheet, illumination device, and display device

A technology of color conversion and color light, which is applied in the field of color conversion sheets, can solve problems such as degradation, and achieve the effects of inhibiting degradation, improving light extraction efficiency, and reducing waste

Active Publication Date: 2010-09-29
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this phosphor has the disadvantage that it is sensitive to atmospheric water vapor and degrades when exposed to water vapor

Method used

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  • Color conversion sheet, illumination device, and display device
  • Color conversion sheet, illumination device, and display device
  • Color conversion sheet, illumination device, and display device

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0030] 3. Modified example 1: Example of an inorganic laminated film using a silicon oxide film, an aluminum oxide film, and a titanium dioxide film as a sealing sheet

example 2

[0031] 4. Modification example 2: Example of an inorganic laminated film using a silicon oxide film, an aluminum oxide film, and a silicon dioxide film as a sealing sheet

[0032] 5. Change Example 3: Example of using a light guide plate as a lighting device

Embodiment

[0034] Structure of Phosphor Sheet 10

[0035] figure 1 A cross-sectional structure of a phosphor sheet (color conversion sheet) 10 according to an embodiment of the present invention is shown. The phosphor sheet 10 allows entry of, for example, blue light, performs color conversion using the blue light as excitation light to thereby enable extraction of white light. The phosphor sheet 10 is obtained by sandwiching the phosphor layer (color conversion layer) 11 between the pair of sealing sheets 10A1 and 10B1. The sealing sheets 10A1 and 10B1 are attached to each other by an adhesive layer 14 . The phosphor layer 11 is sealed between the sealing sheets 10A1 and 10B1 by the adhesive layer 14 .

[0036] The phosphor layer 11 converts the color of a part of incident color light into color light having a longer wavelength, and the phosphor layer 11 is obtained by dispersing phosphor in a resin material. Examples of resin materials include acrylic resins and butyral resins. Th...

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Abstract

The invention relates to a color conversion sheet, an illumination device, and a display device. The color conversion sheet realizing suppression of deterioration in a color conversion layer and improvement in light extraction efficiency is provided. The color conversion sheet includes: a color conversion layer converting a part of first color light as incident light to second color light having a wavelength longer than that of the first color light; and a pair of sealing sheets sandwiching the color conversion layer from a light incidence side and a light emitting side and each having an inorganic stack film on a substrate. Reflectance of the sealing sheet on the light incidence side to the second color light is higher than that to the first color light, and reflectance of the sealing sheet on the light emitting side to the first color light is higher than that to the second color light.

Description

technical field [0001] The present invention relates to a color conversion sheet capable of extracting white light by using blue light as excitation light, and to an illumination device and a display device using the color conversion sheet. Background technique [0002] A liquid crystal display (LCD) is used as an ultrathin display device. In a liquid crystal display, a backlight for illuminating the entire liquid crystal panel from the rear side is used. According to the structure of the backlight, the liquid crystal display is roughly divided into a direct type (direct type) and an edge light type (edge ​​light type). In the case of the edge light type, light is allowed to enter from the side of the light guide plate and propagate inside, thereby performing surface emission on the top surface of the light guide plate. In the case of the direct type, surface emission is performed by arranging a plurality of cold cathode fluorescent lamps (CCFL) in the same plane. Among c...

Claims

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Application Information

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IPC IPC(8): G02F1/13357F21V9/40
CPCG02F1/133603G02F1/133617G02B6/005
Inventor 大岛宜浩塚原翼伊藤靖名田直司
Owner SONY CORP
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