Patent ID: 7891828
Filing Date: 2011-02-22
Classification: G06F,H01H,H03K

Abstract:
1. An electronic device comprising: a housing; and a touch sensor mounted in a part of the housing, wherein the touch sensor further comprising: a translucent panel including a part indicating at least one of character, pattern and symbol; a printed circuit board which senses a touch on the translucent panel by a user; a light emitting diode mounted in the printed circuit board at a position directly opposing the part indicating said at least one of character, pattern and symbol, which irradiates light towards the translucent panel; and a diffusion sheet provided between the translucent panel and the light emitting diode, which diffuses the light irradiated from the light emitting diode, the diffusion sheet further comprising: a first region formed transparent to directly transmit the light; and a second region frosted to diffuse the light towards an outer peripheral portion of the part indicating said at least one of character, pattern and symbol of the translucent panel, wherein the first region being provided to surround the second region, and the second region is a region provided at a section of the diffusion sheet, which directly faces the light emitting diode, closer to a center of the part indicating said at least one of character, pattern and symbol with respect to a virtual pyramid defined by line segments connecting the outer peripheral portions of the part indicating said at least one of character, pattern and symbol and the light emitting diode to each other.