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    • 6. 发明专利
    • Luminescent device
    • JP5362538B2
    • 2013-12-11
    • JP2009291145
    • 2009-12-22
    • 株式会社住田光学ガラス豊田合成株式会社
    • 徹 寺嶋好伸 末広浩二 田角
    • F21S2/00F21Y101/02H01L33/58
    • H01L2224/4809H01L2224/48091H01L2224/48465H01L2924/00014H01L2924/00
    • PROBLEM TO BE SOLVED: To provide a light-emitting device housing in a housing hole extending, to a thickness direction of a light guide plate, a light source for emitting light not only from a side but also from an upper side without impairing luminous efficiency. SOLUTION: The light-emitting device 100 includes: a light source 3 having an element mounting substrate 33, an LED element 32 mounted on the element mounting substrate 33 by flip-chip bonding, and a sealing part 34 to seal the LED element 32 on the element mounting substrate 33; and a light guide plate 1 having a housing hole 2 in which the light source is housed. The housing hole 2 extends from one face 11 of the light guide plate 1 to the other face 12 side, a range out of an inner face 21 where the light from the light source 3 enters is in parallel with a thickness direction of the light guide plate 1, and the light source 3 is housed in the housing hole 2 so that the element mounting substrate 33 may be on the other face 12 side of the light guide plate 1 and emits light to the one face 11 side of the light guide plate 1 of the housing hole 2 and to the inner face 21 side of the housing hole 2. Moreover, an optical axis is in parallel with a thickness direction of the light guide plate 1 and a solid angle of the inner face 21 of the housing hole 2 against a central part of an upper face 34a of the light guide plate 1 in the light source 3 is 4.44 steradian or more. COPYRIGHT: (C)2011,JPO&INPIT