Led reflecting plate and led device

Abstract

A recess is formed in a land ( 2 ) of an LED reflecting plate ( 1 ) formed of a metal plate. The recess comprises a flat LED chip mounting portion ( 7 ) and a reflecting portion ( 8 ) inclined with respect to the LED chip mounting portion ( 7 ). The LED reflecting plate ( 1 ) is mounted on a printed wiring board ( 25 ) such that the land ( 2 ) is fitted in a first through hole ( 18 ). An LED chip ( 27 ) mounted on the LED chip mounting portion ( 7 ) is connected to a terminal portion ( 22 ) formed on the printed wiring board ( 25 ). The printed wiring board ( 25 ) is diced along a third through hole ( 19 ) to form an LED device ( 30 ) as one unit. With this arrangement, heat radiation properties and reflecting efficiency of the LED device ( 30 ) can be improved, and the manufacturing cost can be decreased.

1 . An LED device comprising:
 an LED chip;   an LED reflecting plate made of a metal and having a recess where said LED chip is to be mounted; and   a printed wiring board on which said LED reflecting plate is to be mounted,   said printed wiring board comprising   a first through hole in which the recess of said LED reflecting plate is to be fitted, and   a terminal portion formed on a surface of said printed wiring board to be electrically connected to said LED chip,   said LED reflecting plate comprising   a flat LED chip mounting portion which forms a bottom of the recess, and   a reflecting portion which forms a side wall of the recess and is inclined with respect to said LED chip mounting portion,   said LED device further comprising   a thin metal wire which electrically connects said LED chip and said terminal portion of said printed wiring board,   said LED reflecting plate further comprising   a flat flange around the recess, and   said printed wiring board further comprising   a first substrate formed with the first through hole,   a second substrate which sandwiches, together with said first substrate, said flange of said LED reflecting plate the recess of which is fitted in the first through hole, and   a second through hole which is formed in said second substrate and through which said thin metal wire connected to said LED chip on said LED reflecting plate is extended.   
   
   
       2 . An LED device according to  claim 1 , wherein a plurality of LED chips are mounted on each recess of said LED reflecting plate. 
   
   
       3 . An LED device according to  claim 1 , wherein said printed wiring board further comprises
 an electrical connection hole formed in a portion of said second substrate which is above said flange, and   a wiring line which is formed on a surface of said second substrate and electrically connects the electrical connection hole to said terminal portion.