Patent ID: 8049124
Filing Date: 2011-11-01
Classification: D06F

Abstract:
1. A button for a control panel assembly that includes a control panel having a button hole to mount the button and a display window, the button comprising: a pressing portion having an optical diffusion portion for diffusing light from a light source disposed at a back of the button, wherein the optical diffusion portion of the pressing portion has a lattice structure having a plurality of cavities at a front surface of the pressing portion, and wherein an optical shielding member for shielding a part of light from a light source installed at a back of the pressing portion is further provided at a front surface of the optical diffusion portion, wherein the optical diffusion portion having the lattice structure includes the plurality of cavities, and a plurality of barriers formed between the cavities such that some of the light is scattered by the barriers, thereby providing light to a user.