Phosphor sheet, a diffusion plate, an illuminating device, and a display unit
A display unit and lighting device technology, which is applied in the direction of lighting devices, fixed lighting devices, lighting device components, etc., can solve the problems of characteristic degradation, brightness and chromaticity degradation, etc., and achieve the effect of suppressing degradation
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no. 1 approach
[0036] 1. First Embodiment (Phosphorescent Sheet): Example of Separately Coated Two-Layer Structure with Interlayer Barrier Film
[0037] 2. First modified example: Example without interlayer barrier film
[0038] 3. Second modified example: Example of using an adhesive corresponding to the phosphor type
[0039] 4. Third modified example: Example using adhesive corresponding to phosphor type (without interlayer barrier film)
[0040] 5. First to third application examples: Examples of display unit and lighting device including fluorescent sheet
[0041] 6. Second embodiment (diffusing plate): Example of a three-layer laminated structure in which the upper side and the lower side are sealed with the same adhesive
[0042] 7. Fourth modified example: Example of a two-layer laminated structure in which upper and lower sides are sealed using different adhesives, respectively
[0043] first embodiment
[0044] Structure of fluorescent sheet 10A
[0045] figure 1The cross-sec...
Embodiment 1
[0059] Samples (Samples 1 to 3) of the following fluorescent sheets were actually formed, and the deterioration (chromaticity change) of the phosphor was examined. Specifically, form Figure 3A Sample 1 shown as Comparative Example 1-1, and Figure 3B Shown is Sample 2 as Comparative Example 1-2. Formed as in Example 1 Figure 3C Sample 3 shown. Sample 1 corresponds to the structure of Comparative Example 2 above, and has a color conversion layer 101 contained in which green phosphor 101a and red phosphor 101b are mixed and is sandwiched between high barrier films 103A1 and 103B1 (water vapor transmission rate: 0.01g / m 2 / day) structure between. Sample 2 has a color conversion layer 101 in which a green phosphor 101a and a red phosphor 101b are mixed and contained, and is sandwiched between low barrier films 103A2 and 103B2 (water vapor transmission rate: 0.1 g / m 2 / day) structure between. Sample 3 has a structure in which a red conversion layer 12 including a red phos...
no. 2 approach
[0093] Structure of the diffuser plate 50A
[0094] Figure 15 A cross-sectional structure of a diffuser plate (diffuser plate 50A) according to the second embodiment is schematically shown. The diffusion plate 50A is sealed in a state where the red conversion diffusion plate 52 and the green conversion diffusion plates 51A and 51B are laminated between barrier films 53A and 53B (a pair of base materials). The red conversion diffuser plate 52 serves as a color conversion layer that converts part of blue light into red light, and has a diffusion effect to uniformly diffuse (disperse) incident light. The green conversion diffuser plates 51A and 51B serve as color conversion layers that convert part of blue light into green light, and have a diffusion effect to uniformly diffuse incident light. That is, like the foregoing first embodiment, the diffusion plate 50A has a laminated structure in which respective layers of respective phosphor types exist separately. In the followin...
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