Photosensitive reflector, laser induced touch device and laser touch detection method

Abstract

A photosensitive reflector, a laser induced touch device and a laser touch detection method are provided. The photosensitive reflector, comprising a reflection layer and a photosensitive element, wherein the photosensitive element is disposed on or in the reflection layer and configured to sense at least one of light running through the reflection layer, light incident on the reflection layer, or light reflected by the reflection layer.

1 . A photosensitive reflector, comprising a reflection layer and a photosensitive element, wherein the photosensitive element is disposed on or in the reflection layer and configured to sense at least one of light running through the reflection layer, light incident on the reflection layer, or light reflected by the reflection layer. 
     
     
         2 . The photosensitive reflector according to  claim 1 , wherein the reflection layer includes an optical glass sheet, one or more films are formed on a light incident surface of the optical glass sheet, and the photosensitive element is disposed on one side of the optical glass sheet opposite to the light incident surface. 
     
     
         3 . The photosensitive reflector according to  claim 1 , wherein the reflection layer includes an optical glass sheet, a metal layer is formed on one side of the optical glass sheet opposite to a light incident surface, and the photosensitive element is disposed in an opening of the metal layer. 
     
     
         4 . The photosensitive reflector according to  claim 3 , wherein the metal layer is made of silver or aluminum. 
     
     
         5 . The photosensitive reflector according to  claim 1 , wherein the photosensitive element is at least one selected from the group consisting of photoresistor, photodiode or photistor. 
     
     
         6 . The photosensitive reflector according to  claim 1 , wherein an area of the photosensitive elements occupies less than one third of an area of the reflection layer in the planar direction of the reflection layer. 
     
     
         7 . A laser induced touch device, comprising a touch area, wherein at least one laser transmitter is disposed at an edge of the touch area, photosensitive reflectors are disposed at the edge of the touch area, laser beams emitted by the laser transmitter are reflected by reflection layers of the photosensitive reflectors, so that a laser net is be formed in the touch area by the laser beams, photosensitive elements of the photosensitive reflectors are respectively connected with a control unit; the photosensitive element is configured to transmit sensed light receiving information of the laser beams to the control unit; and the control unit is configured to determine a touch position according to the light receiving information and a predetermined position of the photosensitive reflectors. 
     
     
         8 . The laser induced touch device according to  claim 7 , wherein the laser transmitter is matched with the photosensitive reflectors, so that the laser net extending along one direction is formed in the touch area by the laser beams. 
     
     
         9 . The laser induced touch device according to  claim 7 , wherein the laser transmitter is matched with the photosensitive reflectors, so that the laser net extending along two or more intersected directions are formed in the touch area by the laser beams. 
     
     
         10 . The laser induced touch device according to  claim 7 , wherein each side of the touch area is provided with one photosensitive reflector, multiple photosensitive elements are respectively disposed on each photosensitive reflector, and each photosensitive element corresponds to each reflection point on the photosensitive reflector. 
     
     
         11 . The laser induced touch device according to  claim 7 , wherein multiple photosensitive reflectors are respectively disposed on each side of the touch area; multiple photosensitive elements are respectively disposed on each photosensitive reflector, and each photosensitive element corresponds to each reflection point on the each photosensitive reflector. 
     
     
         12 . The laser induced touch device according to  claim 7 , wherein each side of the touch area is provided with multiple photosensitive reflectors, one photosensitive element is disposed on each photosensitive reflector, and the photosensitive element corresponds to the reflection point on the each photosensitive reflector. 
     
     
         13 . The laser induced touch device according to  claim 7 , wherein the touch area is a display unit or a space area. 
     
     
         14 . The laser induced touch device according to  claim 13 , wherein the display unit is a rectangular display. 
     
     
         15 . The laser induced touch device according to  claim 14 , wherein the laser transmitter is a visible laser, the visible laser is disposed on one or two adjacent vertexes of the rectangular display and matched with the photosensitive reflectors; and the laser net extending along one or two directions parallel to two adjacent sides of the rectangular display are distributed on the rectangular display. 
     
     
         16 . A laser touch detection method, comprising:
 forming at least one laser transmitter and photosensitive reflectors at an edge of a touch area, switching on the laser transmitter to emit laser beams, and forming a laser net in the touch area by the laser beams emitted by the laser transmitter and reflected by the photosensitive reflectors;   connecting photosensitive elements of the photosensitive reflectors to a control unit, and allowing the photosensitive elements to transmit sensed light receiving information of the laser beams to the control unit;   performing a touch operation on the touch area to stop propagation of the laser beams, and allowing the photosensitive elements on an optical path of the laser beams, behind a touch position of the touch operation, to respectively stop receiving the light receiving information; and   determining the touch position by the control unit according to a predetermined position of the photosensitive reflector which firstly stops receiving the light receiving information.   
     
     
         17 . The laser touch detection method according to  claim 16 , wherein the laser transmitter is matched with the photosensitive reflectors, so that the laser net extending along one direction is formed in the touch area by the laser beams. 
     
     
         18 . The laser touch detection method according to  claim 16 , wherein the laser transmitter is matched with the photosensitive reflectors, so that the laser net extending along two or more intersected directions are formed in the touch area by the laser beams. 
     
     
         19 . The laser touch detection method according to  claim 18 , wherein the laser transmitter is matched with the photosensitive reflectors, so that the laser nets extending along two mutually perpendicular directions are tamed in the touch area by the laser beams. 
     
     
         20 . The laser touch detection method according to  claim 16 , wherein the tight receiving information the photosensitive elements is acquired through the control unit by scanning acquisition method or parallel acquisition method.