Optical touch system and method for optical touch location

摘要

The present invention provides an optical touch system, applied to an electronic apparatus having at least a physical plane. It comprises: an optical unit set on the physical plane and configured to produce a first optical effect; an image acquisition unit set on the physical plane, at least a part of the optical unit being within an acquisition range of the image acquisition unit, a touch operation area being formed by the image acquisition unit and the optical unit; the image acquisition unit configured to capture an image having a second optical effect which is formed on the first optical effect after an operation body for operating the electronic apparatus enters the touch operation area; a processing unit being connected with the image acquisition unit and configured to determine the range of the operation body in the touch operation area according to the image having the second optical effect. The present invention also provides an optical touch input display apparatus and optical touch input positioning method. The touch system of the present invention is low-cost and highly reliable.

主权项

1. An optical touch system, applied to an electronic apparatus having at least a physical plane, characterized in that it comprises:
an optical unit set on the physical plane and configured to produce a first optical effect; an image acquisition unit set on the physical plane, at least a part of the optical unit being within an acquisition range of the image acquisition unit, a touch operation area being formed by the image acquisition unit and the optical unit; the image acquisition unit configured to capture an image having a second optical effect which is formed on the first optical effect after an operation body for operating the electronic apparatus enters the touch operation area; and a processing unit connected with the image acquisition unit and configured to determine the range of the operation body in the touch operation area according to the image having the second optical effect, wherein the image acquisition unit is set at one vertex or two vertexes located on a first edge on the physical plane respectively, the optical unit is set on an edge other than the first edge on the physical plane and, the optical unit comprises: a light source; an optical component configured to propagate the light from the light source along a side of the physical plane while scattering the light from the point light source onto the physical plane wherein the optical component comprises
a first optical element configured to have an end face facing the light source to receive light from the light source; anda second optical element configured to have a side face facing a side face of the first optical element to receive the light from the first optical element and deliver the light from the first optical element onto the physical plane,the first optical element is an optical fiber, and the second optical element is a light guide plate,the light guide plate is set on the optical fiber along the edge of the physical plane, the light guide plate being used to scatter the light from the optical fiber onto the physical plane,the optical fiber is located under the light guide plate;the light guide plate is set on the edges of a display screen, and the lower side edge of the light guide plate is flush with the surface of the display screen.