Patent ID: 8878124

Claim:
An optical touch device with a detecting area, comprising: a plurality of light guide components arranged along a plurality of sides of the detecting area, each of the light guide components including a first light emitting surface facing the detecting area, and the light guide components including a first light guide component and a second light guide component arranged at two neighboring sides of the detecting area; a light source module configured for providing light into the light guide components; a light detecting component disposed between two neighboring ends of the first light guide component and the second light guide component, and the light detecting component including a light detecting end facing the detecting area; and an auxiliary light guide component disposed between the two neighboring ends of the first light guide component and the second light guide component, and positioned between the light detecting component and the detecting area, the auxiliary light guide component including a first light incidence surface facing the first light guide component, a second light incidence surface facing the second light guide component and a second light emitting surface facing the detecting area, and the second light emitting surface being connected between the first light incidence surface and the second light incidence surface.