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1. US20120169968 - Light emitting device, backlight unit, liquid crystal display apparatus, and lighting apparatus

注意: このテキストは、OCR 処理によってテキスト化されたものです。法的な用途には PDF 版をご利用ください。

[ EN ]

Claims

1. A light-emitting device comprising:
a board;
a plurality of light-emitting parts each of which includes (i) a semiconductor light-emitting element mounted on said board and (ii) a wavelength conversion layer including a light wavelength converter and covering said semiconductor light-emitting element; and
a plurality of light-guiding members each of which is provided on said board, between said light-emitting parts which are adjacent to each other,
wherein each of said light-guiding members is formed to cover part of said wavelength conversion layer included in said light-emitting part.
2. The light-emitting device according to claim 1,
wherein said light-guiding member is adjacent to said wavelength conversion layer.
3. The light-emitting device according to claim 1,
wherein at least an end portion of said light-guiding member on a side of said semiconductor light-emitting element is on a side of said semiconductor light-emitting element with respect to a normal that extends from an intersection between said board and one of (i) an outline of said light-emitting part and (ii) an extension of the outline.
4. The light-emitting device according to claim 1,
wherein said light-guiding member connects said light-emitting parts which are adjacent to each other.
5. The light-emitting device according to claim 1,
wherein said light-guiding member has a function of diffusing light that is guided in said light-guiding member.
6. The light-emitting device according to claim 5,
wherein said light-guiding member includes a diffusion material.
7. The light-emitting device according to claim 6,
wherein density of said diffusion material in said light-guiding member is higher as a distance from said semiconductor light-emitting element is greater.
8. The light-emitting device according to claim 1,
wherein

           n1 ≦n2
is satisfied, when a refractive index of said wavelength conversion layer is denoted by n 1 and a refractive index of said light-guiding member is denoted by n 2.
9. The light-emitting device according to claim 1,
wherein said light-guiding member is a transparent resin.
10. The light-emitting device according to claim 1,
wherein said wavelength conversion layer is a phosphor layer including a phosphor which is excited by light of said semiconductor light-emitting element.
11. The light-emitting device according to claim 1,
wherein said wavelength conversion layer is dome-shaped.
12. The light-emitting device according to claim 4,
wherein said board is elongated, and
said light-emitting parts and said light-guiding member are arranged linearly in a row along a longer direction of said board.
13. The light-emitting device according to claim 12,
wherein

          0 ≦D1 /L1 ≦L1/2 n
is satisfied, when a distance between said light-guiding members which are adjacent to each other is denoted by D 1, a length of said board in the longer direction is denoted by L 1, and the number of said semiconductor light-emitting elements is denoted by n.
14. The light-emitting device according to claim 1,
wherein

          10 ≦L1 /L2
is satisfied, when a length of said board in a longer direction is denoted by L 1, and a length of said board in a shorter direction is denoted by L 2.
15. The light-emitting device according to claim 1,
wherein

          0 <h2 /h1≦1
is satisfied, when a height of said light-emitting part is denoted by h 1 and a height of said light-guiding member is denoted by h 2.
16. The light-emitting device according to claim 1,
wherein a groove for regulating a position of an end portion of said light-guiding member is formed on said board.
17. A backlight unit comprising
the light-emitting device according to claim 1.
18. A liquid crystal display apparatus comprising:
the backlight unit according to claim 17; and
a liquid crystal panel provided on an optical path of light emitted from said backlight unit.
19. A lighting apparatus comprising
the light-emitting device according to claim 1.