OPTICAL TOUCH MODULE CAPABLE OF INCREASING LIGHT EMITTING ANGLE OF LIGHT EMITTING UNIT
First Claim
1. An optical touch module capable of increasing a light emitting angle of a light emitting unit, the optical touch module comprising:
- a screen having a touch surface; and
at least one optical positioning device disposed on the screen, the optical positioning device comprising;
a case;
at least one light emitting unit disposed on the case for emitting invisible light;
a circuit board electrically connected to the light emitting unit for controlling the light emitting unit;
a transparent diffusing part disposed at a light emitting side of the light emitting unit, a bar structure being formed on a light entrance surface of the transparent diffusing part for scattering the invisible light to be distributed over the touch surface; and
an image capturing unit disposed on the case for capturing an optical image of a touch object on the touch surface when the touch object is illuminated by the invisible light.
1 Assignment
0 Petitions
Accused Products
Abstract
An optical touch module includes a screen and at least one optical positioning device disposed on the screen. The optical positioning device includes a case, at least one light emitting unit, a circuit board, a transparent diffusing part and an image capturing unit. The light emitting unit is disposed on case for emitting invisible light. The circuit board is electrically connected to the light emitting unit for controlling the light emitting unit. The transparent diffusing part is disposed at a light emitting side of the light emitting unit. A bar structure is formed on a light entrance surface of the transparent diffusing part for scattering the invisible light to be distributed over a touch surface of the screen. The image capturing unit is disposed on the case to capture an optical image for a touch object on the touch surface when the touch object is illuminated by the invisible light.
-
Citations
15 Claims
-
1. An optical touch module capable of increasing a light emitting angle of a light emitting unit, the optical touch module comprising:
-
a screen having a touch surface; and at least one optical positioning device disposed on the screen, the optical positioning device comprising; a case; at least one light emitting unit disposed on the case for emitting invisible light; a circuit board electrically connected to the light emitting unit for controlling the light emitting unit; a transparent diffusing part disposed at a light emitting side of the light emitting unit, a bar structure being formed on a light entrance surface of the transparent diffusing part for scattering the invisible light to be distributed over the touch surface; and an image capturing unit disposed on the case for capturing an optical image of a touch object on the touch surface when the touch object is illuminated by the invisible light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
Specification