Patent ID: 8878805

Claim:
An electronic device including an operation area and a non-operation area positioned outside the operation area, the electronic device comprising: an operation unit including a first principal surface and a second principal surface positioned opposite to the first principal surface, wherein the first principal surface is an initial ambient light surface; a light shielding film formed on the first principal surface of the operation unit corresponding to the non-operation area; and a vibrator provided on the second principal surface of the operation unit corresponding to the non-operation area, wherein when a critical angle at which light is totally reflected by the second principal surface of the operation unit is represented by θ and sum of a thickness T 1 of the operation unit and a thickness T 2 of the vibrator is represented by T, wherein at least part of the vibrator is positioned, in sectional view, within a range of T×tan θ from an end on the operation area side of the light shielding film on the second principal surface of the operation unit corresponding to the non-operation area, and a reflection-reducing film having a reflectance lower than a reflectance of a surface of the vibrator is provided on the surface of the vibrator positioned within the range of T×tan θ from the end on the operation area side of the light shielding film.