Patent ID: 8698781
Filing Date: 2014-04-15
Classification: G06F

Abstract:
1. An optical touch device, comprising: a transparent substrate comprising a touch surface and a plurality of side surfaces adjacent to the touch surface, at least one of the side surfaces being a first light incidence surface, and at least one of the side surfaces being a first light emitting surface opposite to the first light incidence surface; at least a light emitting and receiving unit, and each light emitting and receiving unit comprising: a linear light source disposed beside the first light incidence surface of the transparent substrate and configured for providing a plurality of optical signals into the transparent substrate; a light path adjusting component disposed between the linear light source and the first light incidence surface and configured for adjusting incidence angles of the optical signals striking at the first incidence surface so that each of the optical signals enters into the transparent substrate through the first incidence surface with a predetermined angle, wherein the light path adjusting component has a bottom surface, a fourth light incidence surface and a fourth light emitting surface opposite to the fourth light incidence surface, the bottom surface is connected between the fourth light emitting surface and the fourth light incidence surface, the fourth light emitting surface is a plane surface and has two opposite edges respectively connected to the bottom surface and the fourth light incident surface, the fourth light incidence surface is a convex curved surface facing to the linear light source, and the fourth light emitting surface is an inclined surface with respective to the bottom surface; and a light sensing component disposed beside the first light emitting surface, the light sensing component and the linear light source being respectively disposed at two opposite sides of the transparent substrate, and the light sensing component being configured for sensing the optical signals from the linear light source.