LIGHT SOURCE MODULE FOR A KEY PAD

摘要

A light source module for a key pad is provided to form an opening part on a circuit board and install LEDs to be inserted into the opening part, thereby reducing the total thickness of the light source module. A light source module for a key pad comprises the followings: a circuit board(110) in which an opening part is formed in a predetermined area thereof; and plural LEDs(Light Emitting Diodes)(200) which are inserted into the opening part and are installed on the circuit board(110). The LED forms a peak point having the highest brightness within the range of +/-20 degrees to +/-70 degrees. Brightness at a 0 degree is below 0.5 when brightness of the peak point is regarded as 1.