LIGHT-EMITTING DEVICE

PROBLEM TO BE SOLVED: To provide a light-emitting device arranged to introduce excitation light from a light guide member into a wavelength conversion member and to take out, from a side face thereof, light emitted by the wavelength conversion member in response to the excitation light, by which the loss of light energy can be prevented, and a higher brightness can be achieved.SOLUTION: A light-emitting device comprises: a light-emitting part 50 including a wavelength conversion member 20, and a reflection member 43 covering an upper surface of the wavelength conversion member; and a light guide member 10 fixed to a backside of the light-emitting part and serving to supply light for exciting a fluorescent material included in the wavelength conversion member. The light-emitting part 50 has a total reflection layer 41 formed on each sides of the wavelength conversion member; the total reflection layer is formed from a material smaller than the wavelength conversion member in refraction index. The light-emitting device preferably comprises means for directing light introduced from the light guide member into the wavelength conversion member toward a side face of the light-emitting part. 【課題】光ガイド部材から波長変換部材に励起光に導入し、励起光によって波長変換部材が発する光をその側面から取り出す発光装置において、光エネルギーの損失を防止し、高輝度化を図る。【解決手段】波長変換部材２０と当該波長変換部材の上面を覆う反射部材４３とを含む発光部５０と、発光部の裏面に固定され、波長変換部材に含まれる蛍光体を励起する光を供給する光ガイド部材１０とを備え、発光部５０は、波長変換部材を挟んで両側に、波長変換部材の屈折率よりも低屈折率の材料からなる全反射層４１が形成されている。好適には光ガイド部材から波長変換部材に導入された光を、発光部の側面に向かわせる手段を備えている。【選択図】図１