Patent ID: 8786548

Claim:
A mobile terminal, comprising: a terminal body; a controller; and an input device mounted on the terminal body, wherein the input device comprises: at least one key button formed of a transparent material and having an internal space; an illumination sensor located in the internal space and having a light-receiving portion, wherein the illumination sensor is configured to sense a first light and a second light, wherein the first light is ambient light; a light-emitting portion located at a side of the illumination sensor and configured to output the second light to the outside of the at least one key button for detecting a touch applied to the at least one key button; a spacer comprising an elastically deformable material that is positioned between the illumination sensor and an internal wall of the at least one key button such that the spacer is located below the internal wall of the at least one key button, the spacer configured to cover the illumination sensor in order to suppress shock transferred to the illumination sensor when a contact touch is received via the at least one key button, the spacer including a through hole positioned over the light-receiving portion to transfer light to the light-receiving portion, and an input signal generation unit configured to generate a touch input signal according to light sensed at the light-receiving portion via the through hole, wherein the controller is configured to generate a first control command when the light sensed at the light-receiving portion of the illumination sensor is the first light and generate a second control command when the light sensed at the light-receiving portion of the illumination sensor is the second light.