OPTICAL TOUCH DEVICE
An optical touch device includes a transparent substrate and at least a light emitting and receiving unit. The transparent substrate has a touch surface, a first light incidence surface and a first light emitting surface. Each light emitting and receiving unit includes a linear light source, a light path adjusting component and a light sensing component. The linear light source is disposed beside the first light incidence surface. The light path adjusting component is disposed between the linear light source and the first light incidence surface and configured for adjusting the 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. The light sensing component is disposed beside the first light emitting surface. The optical touch device has a high light utility efficiency.
In the optical touch devices of embodiments of the present invention, the light path adjusting component is applied so that the optical signals have an identical incidence angles while striking at the first light incidence surface of the transparent substrate. Thus, the light incidence efficiency of the optical signals entering into the transparent substrate can be increased, thereby increasing a light utility efficiency. In addition, in another embodiment, the optical touch device includes a light concentrating component for concentrating the optical signals. The light emitting structure of the light concentrating component can limit the emitting angles of the optical signals emitting from the light emitting surface. Thus, the light incidence efficiency of the optical signals irradiating on the light sensing component can be increased, thereby increasing a light utility efficiency.
touch
29-Oct-2010
12/915,613
display
美国
