Light emitting device package, backlight unit, lighting device and its manufacturing method

Abstract

Disclosed are a light emitting device package, a backlight unit, and a lighting device which are usable for a display or lighting, and a method of manufacturing the light emitting device package. The light emitting device package includes: a substrate; a light emitting device seated on the substrate; a reflecting member provided on the substrate and provided with a reflector cup surrounding a lateral circumference of the light emitting device; a transparent encapsulant charged in the reflector cup of the reflecting member in a flow state and hardened, and provided with a concave phosphor accommodating space in an upper surface thereof; and a phosphor charged in the phosphor accommodating space in a flow state and hardened.

What is claimed is: 
     
         1 . A light emitting device package, comprising:
 a substrate;   a light emitting device seated on the substrate;   a reflecting member provided on the substrate and provided with a reflector cup surrounding a lateral circumference of the light emitting device;   a transparent encapsulant charged in the reflector cup of the reflecting member in a flow state and hardened, and provided with a concave phosphor accommodating space in an upper surface thereof; and   a phosphor charged in the phosphor accommodating space in a flow state and hardened,   wherein a length of the phosphor is larger than a width of the light emitting device, and   a part of a boundary of the phosphor is partially inserted into an inclined surface of the concave phosphor accommodating space of the transparent encapsulant.   
     
     
         2 . The light emitting device package of  claim 1 , wherein the phosphor has a crescent moon shape in which a cross section at a center portion has a larger thickness than a thickness of a cross section at a boundary portion thereof. 
     
     
         3 . A backlight unit, comprising:
 a substrate;   a light emitting device seated on the substrate;   a reflecting member provided on the substrate and provided with a reflector cup surrounding a lateral circumference of the light emitting device;   a transparent encapsulant charged in the reflector cup of the reflecting member in a flow state and hardened, and provided with a concave phosphor accommodating space in an upper surface thereof;   a phosphor charged in the phosphor accommodating space in a flow state and hardened; and   a light guide plate provided at an optical path of the light emitting device,   wherein a length of the phosphor is larger than a width of the light emitting device, and   a part of a boundary of the phosphor is partially inserted into an inclined surface of the concave phosphor accommodating space of the transparent encapsulant.   
     
     
         4 . A method of manufacturing a light emitting device package, comprising:
 preparing a substrate;   providing a reflecting member on the substrate so that a reflector cup is formed;   seating a light emitting device on the substrate inside the reflector cup;   charging a transparent encapsulant in the reflector cup of the reflecting member in a flow state so that a concave phosphor accommodating space is formed in an upper surface of the transparent encapsulant;   charging a phosphor in the phosphor accommodating space in a flow state before the transparent encapsulant is hardened; and   thermally hardening the transparent encapsulant and the phosphor,   wherein the charging of the phosphor includes charging the phosphor so that a width of the phosphor is larger than a width of the light emitting device, and a part of a boundary of the phosphor is partially inserted into an inclined surface of the concave phosphor accommodating space of the transparent encapsulant.   
     
     
         5 . The method of  claim 4 , further comprising:
 rotating the substrate by using centrifugal force after the charging of the phosphor.   
     
     
         6 . The method of  claim 5 , wherein in the rotating of the substrate, a rotation speed or a rotation time for rotating the substrate is larger than a deformation value by which the phosphor or the transparent encapsulant begins to be deformed by the centrifugal force and smaller than a separation value by which the phosphor and the transparent encapsulant are separated from the reflector cup.