Keypad apparatus for portable communication device

摘要

Provided is a keypad apparatus for a portable communication device structured to have a Printed Circuit Board (PCB) including a plurality of dome switches and a plurality of Light-Emitting Diodes (LEDs). The keypad apparatus includes a waveguide sheet portion provided on the dome switches, a plurality of printed surfaces which are printed on a top surface of the waveguide sheet portion and adjust a brightness of light from the LEDs, in a stepwise manner from a position distant from the LEDs to a position adjacent to the LEDs, and a keypad provided on the printed surfaces.

主权项

1. A keypad apparatus for a portable communication device including a Printed Circuit Board (PCB) having a plurality of dome switches and a plurality of Light-Emitting Diodes (LEDs), the keypad apparatus comprising:
a waveguide sheet portion provided over the plurality dome switches; a plurality of printed surfaces that are formed with diffusion ink and printed on a top surface of the waveguide sheet portion on a degree by adjusting the degree of the diffusion ink with respect to a print position variably according to positions of the LEDs and the printed surfaces; and a keypad provided over the plurality of printed surfaces, wherein the degree of the diffusion ink forms a low brightness of light if the positions of the LEDs and the printed surfaces are adjacent to each other and the degree of the diffusion ink forms a high brightness of light if the positions of the LEDs and the printed surfaces are distant from each other.