Optical touch system and method
AssigneeSunplus Innovation Technology Inc.
InventorYu-Kuo Cheng
Life of this patent
Estimating the term…
Abstract
An optical touch system and an optical touch method are provided. The optical touch system includes a scanning unit, a light source, a detector, a first light collecting unit and a second light collecting unit. The scanning unit provides an incident ray in a first direction. At least a portion of the energy of a reflected ray corresponding to the incident ray in a second direction is received by the first light collecting unit and collected to the detector. A retro-reflected ray corresponding to the incident ray in the first direction is received by the second light collecting unit and collected to the detector.
Claims19
An optical touch system, comprising:
- a touch-sensitive zone;
- a first optical touch module arranged at a first side of the touch-sensitive zone for providing a first incident ray to the touch-sensitive zone;
- and
- a second optical touch module arranged at a second side of the touch-sensitive zone for providing a second incident ray to the touch-sensitive zone, wherein the first incident ray and the second incident ray are alternately provided by the first optical touch module and the second optical touch module, wherein when the first incident ray and the second incident ray strike a touching object within the touch-sensitive zone, a plurality of reflected rays are reflected by the touching object, wherein the reflected rays are detected by the first optical touch module and the second optical touch module, so that a plurality of detecting values are outputted;
- and
- a micro controller unit for receiving the detecting values from the first optical touch module and the second optical touch module, thereby calculating a position of the touching point within the touch-sensitive zone.
An optical touch method for use in an optical touch system including a first optical touch module and a second optical touch module, the optical touch method comprising steps:
- alternately providing a first incident ray and a second incident ray by the first optical touch module and the second optical touch module, respectively;
- detecting the light intensities of a plurality of reflected rays produced when the first incident ray and the second incident ray strike a touching object, thereby acquiring a plurality of detecting values;
- and
- calculating a position of the touching object within a touch-sensitive zone according to the a plurality of detecting values.
An optical touch system, comprising:
- a touch-sensitive zone;
- a first optical touch module comprising:
- a first scanning unit for providing a first incident ray in a first direction;
- and
- an external detector for detecting a reflected ray corresponding to the first incident ray in a second direction, wherein the second direction is not parallel with the first direction;
- and
- a micro controller unit for controlling the first optical touch module and receiving a detecting value from the external detector, thereby calculating a position of a touching point within a touch-sensitive zone.
An optical touch method for use in an optical touch system including a first optical touch module and a second optical touch module, the first optical touch module comprising a first scanning unit, the second optical touch module comprising a second detector, the optical touch method comprising steps:
- providing a first incident ray in a first direction by the first scanning unit;
- and
- allowing the second detector to receive a reflected ray corresponding to the first incident ray in a second direction, wherein the second direction is not parallel with the first direction.
Dependencies are inferred from the claim text.