Optical touch device and light source assembly

Abstract

An optical touch device includes a sensing area, a first linear light source disposed next to a first side of the sensing area, a light penetration and reflection component disposed between the first linear light source and the first side, and a light sensing component configured to have a field of view of the entire sensing area. The light penetration and reflection component includes a substrate and a light penetration and reflection structure disposed on the substrate. The light penetration and reflection structure includes a plurality of prime pillars protruding from a surface, opposite to the first linear light source, of the substrate and thereby forming a plurality of reflection regions and light penetration regions. The prism pillars each are configured to have a length direction parallel to the first side. Each prime pillar has at least a reflection surface. The reflection surfaces are included in the reflection regions.

What is claimed is: 
     
         1 . An optical touch device, comprising:
 a sensing area;   a first linear light source disposed next to a first side of the sensing area;   a light penetration and reflection component disposed between the first linear light source and the first side, the light penetration and reflection component comprising a substrate and a light penetration and reflection structure disposed on the substrate, the light penetration and reflection structure comprising a plurality of prime pillars protruding from a surface, opposite to the first linear light source, of the substrate and thereby forming a plurality of reflection regions and a plurality of light penetration regions, the prism pillars each being configured to have a length direction parallel to the first side, each prime pillar comprising at least a reflection surface, the reflection surfaces being included in the reflection regions; and   a light sensing component configured to have a field of view of the entire sensing area.   
     
     
         2 . The optical touch device according to  claim 1 , wherein each prism pillar comprises two reflection surfaces configured to be titled and connected to each other, each adjacent two prime pillars are configured to have a gap therebetween, and the gaps are included in the light penetration regions. 
     
     
         3 . The optical touch device according to  claim 1 , wherein each prism pillar comprises two reflection surfaces, configured to be titled to each other, and a light penetration portion, configured to be connected between the two reflection surfaces, the light penetration portions are included in the light penetration regions. 
     
     
         4 . The optical touch device according to  claim 3 , wherein the light penetration portion is configured to have a curve or a flat structure. 
     
     
         5 . The optical touch device according to  claim 3 , wherein each adjacent two prime pillars are configured to be connected to each other. 
     
     
         6 . The optical touch device according to  claim 5 , wherein one of the light penetration portions is configured to have an orthogonal projection area A 1  on the surface of the substrate, the prism pillar is configured to have an area A 2  on the surface of the substrate, and 1/20≦A 1 /A 2 ≦⅕. 
     
     
         7 . The optical touch device according to  claim 3 , wherein each adjacent two prime pillars are configured to have a gap therebetween, the gaps are included in the light penetration regions. 
     
     
         8 . The optical touch device according to  claim 7 , wherein one of the light penetration portions is configured to have an orthogonal projection area A 1  on the surface of the substrate, the prism pillar is configured to have an area A 2  on the surface of the substrate, the gap is configured to have an area of A 3 , and 1/20≦(A 1 /A 3 )/A 2 ≦⅕. 
     
     
         9 . The optical touch device according to  claim 1 , wherein each prism pillar is configured to have a plurality of V-shaped grooves disposed on a top surface thereof opposite to the first leaner light source, each V-shaped groove is configured to have two groove walls, the groove walls of the V-shaped grooves are included in the reflection surfaces, the light penetration and reflection structure further comprises a plurality of platforms configured to protrude from the surface of the substrate opposite to the linear light source, the platforms and the prism pillars are arranged alternately, the platforms are included in the light penetration regions. 
     
     
         10 . The optical touch device according to  claim 1 , wherein the light penetration and reflection structure is formed in a central area of the surface of the substrate. 
     
     
         11 . The optical touch device according to  claim 1 , further comprising a second linear light source disposed next to a second side of the sensing area, wherein the second side is configured to be opposite to the first side. 
     
     
         12 . The optical touch device according to  claim 11 , further comprising:
 a third linear light source disposed next to a third side of the sensing area, the third side being configured to be connected between the first and second sides, the light sensing component being disposed in a connection area of the second and third sides; and   a mirror disposed next to a fourth side of the sensing area, wherein the fourth side is configured to be opposite to the third side.   
     
     
         13 . The optical touch device according to  claim 1 , further comprising a display panel, the sensing area is formed on a display surface of the display panel. 
     
     
         14 . The optical touch device according to  claim 1 , further comprising a plate, on which the sensing area is formed. 
     
     
         15 . A light source assembly of an optical touch device, comprising:
 a linear light source disposed next to a side of a sensing area of the optical touch device; and   a light penetration and reflection component disposed between the first linear light source and the side, the light penetration and reflection component comprising a substrate and a light penetration and reflection structure disposed on the substrate, the light penetration and reflection structure comprising a plurality of prime pillars protruding from a surface, opposite to the first linear light source, of the substrate and thereby forming a plurality of reflection regions and a plurality of light penetration regions, the prism pillars each being configured to have a length direction parallel to the side, each prime pillar comprising at least a reflection surface, the reflection surfaces being included in the reflection regions.   
     
     
         16 . A light source assembly of an optical touch device, comprising:
 a linear light source disposed next to a side of a sensing area of the optical touch device; and   a light penetration and reflection component disposed between the linear light source and the side, the light penetration and reflection component comprising a plurality of optical micro-structures, each optical micro-structure comprising a top portion, a bottom portion and at least a reflection surface, the top portion being configured to be opposite to the linear light source, the reflection surface(s) being configured to be connected between the top portion and the bottom portion, at least one of the top portion and the bottom portion comprising a flat region, each reflection surface being configured to be titled relative to the flat region(s).   
     
     
         17 . The light source assembly of an optical touch device according to  claim 16 , wherein the optical micro-structure is a triangular pillar, a trapezoidal pillar, or a combination of the triangular pillar and the trapezoidal pillar. 
     
     
         18 . The light source assembly of an optical touch device according to  claim 16 , wherein the bottom portion of each optical micro-structure is the flat region, the top portion comprises a plurality of V-shaped grooves, each V-shaped groove is configured to have two groove walls, and the groove walls of the V-shaped grooves are the reflection surface. 
     
     
         19 . The light source assembly of an optical touch device according to  claim 16 , wherein the linear light source comprises a light guide strip, the top portions of the optical micro-structures is configured to be connected to the light guide strip. 
     
     
         20 . The light source assembly of an optical touch device according to  claim 16 , wherein each adjacent two optical micro-structures are configured to be connected to each other. 
     
     
         21 . The light source assembly of an optical touch device according to  claim 16 , wherein each adjacent two optical micro-structures are configured to have a distance therebetween.