US20130155025A1

US20130155025A1 - Optical touch device and light source assembly

Info

Publication number: US20130155025A1
Application number: US13/473,582
Authority: US
Inventors: Hung-Ching Lai; Hui-Hsuan Chen; Chi-Chieh Liao
Original assignee: Pixart Imaging Inc
Current assignee: Pixart Imaging Inc
Priority date: 2011-12-19
Filing date: 2012-05-16
Publication date: 2013-06-20
Also published as: TW201327320A; US10156939B2; US20170038913A1; TWI451312B

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.

Description

TECHNICAL FIELD

The present invention relates to a touch device, and more particularly to an optical touch device and a light source assembly thereof.

BACKGROUND

Touch function has become one of the essential features of many today's electronic devices, and touch device is one of the common electronic devices capable of realizing the touch function. Basically, the present touch devices are categorized to: resistive type, capacitive type and optical type. Thus, various electronic devices can adopt various types of touch device based on different touch requirements.
FIG. 1 is a schematic structure view of a conventional optical touch device. As shown, the conventional optical touch device 100 includes a light guide set 110, a light emitting component 120 and a light sensing component 130. The light guide set 110 includes two light guide strips 112 a, 112 b and a strip mirror 114. The light guide strips 112 a, 112 b and the strip mirror 114 are arranged respectively along three of four sides of a rectangular trajectory; wherein the light guide strip 112 a is configured to be opposite to the strip mirror 114, the light guide strips 112 b is configured to be connected between the light guide strip 112 a and the strip mirror 114, and the area within the rectangular trajectory is defined as a sensing area 116. In addition, the light emitting component 120 is disposed between the two adjacent ends of the light guide strips 112 a, 112 b and configured to provide lights to inside the light guide strips 112 a, 112 b. The light guide strips 112 a, 112 b each is configured to direct the lights from the light emitting component 120 to the sensing area 116. The light sensing component 130 is disposed near to one end of the light guide strip 112 a and configured to have a field of view (FOV) of the entire sensing area 116.
The light sensing component 130 is configured to detect a light-blocking object in the sensing area 116 and determine the light-blocking object' position. As shown in FIG. 1, for example, a touch point (or, light-blocking object) A is located in the sensing area 116, and a corresponding mirroring point A1 is formed on the strip mirror 114. Accordingly, a dark point A2, derived from the touch point A, and a dark point A3, derived from the mirroring point A1, are generated. Through detecting the two dark points A2, A3, the light sensing component 130 can obtain the distances d1, d2. And thus, the position (or, coordinate) of the touch point A can be obtained from the distances d1, d2, some known parameters such as the length of the X-axis of the sensing area 116, the width of the Y-axis of the sensing area 116, and some known conditions such as the shortest distance from the touch point A to the strip mirror 114 being equal to the shortest distance from the mirroring point A1 to the strip mirror 114. The means for the calculation of a coordinate are apparent to those ordinarily skilled in the art; no any unnecessary detail will be given here.
However, the conventional optical touch device 100 may have a blind zone 150 which is located near the lower left corner of the sensing are 116; wherein the blind zone means a specific area, in which the touch point's coordinate is difficult to be accurately calculated. For example, as shown in FIG. 1, a touch point B is located in the blind zone 150 of the sensing area 116 and a corresponding mirroring point B1 is formed on the strip mirror 114. Accordingly, the dark point B2, derived from the touch point B, and a dark point B3, derived from the mirroring point B1, may overlap; so, the coordinate of the touch point B is difficult to be calculated accurately.

SUMMARY OF EMBODIMENTS

Therefore, one object of the present invention is to provide an optical touch device to avoid the blind zone issue.
Another object of the present invention is to provide a light source assembly adopted in an optical touch device to solve the blind zone issue.
Still another object of the present invention is to provide a light source assembly adopted in an optical touch device to solve the blind zone issue.
The present invention provides an optical touch device, which includes a sensing area, a first linear light source, a light penetration and reflection component and a light sensing component. The first linear light source is disposed next to a first side of the sensing area. The light penetration and reflection component is disposed between the first linear light source and the first side. 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 a plurality of 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. The light sensing component is configured to have a field of view of the entire sensing area.
In an embodiment of the present invention, each prism pillar has two reflection surfaces configured to be titled and connected to each other. Each adjacent two prime pillars are configured to have a gap therebetween. The gaps are included in the light penetration regions.
In an embodiment of the present invention, each prism pillar has 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.
In an embodiment of the present invention, the light penetration portion is configured to have a curve or a flat structure.
In an embodiment of the present invention, each adjacent two prime pillars are configured to be connected to each other.
In an embodiment of the present invention, one of the light penetration portions is configured to have an orthogonal projection area A1 on the surface of the substrate; the prism pillar is configured to have an area A2 on the surface of the substrate; and 1/20≦A1/A2≦⅕.
In an embodiment of the present invention, each adjacent two prime pillars are configured to have a gap therebetween, the gaps are included in the light penetration regions.
In an embodiment of the present invention one of the light penetration portions is configured to have an orthogonal projection area A1 on the surface of the substrate; the prism pillar is configured to have an area A2 on the surface of the substrate; the gap is configured to have an area of A3; and 1/20≦(A1/A3)/A2≦⅕.
In an embodiment of the present invention, 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 includes 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.
In an embodiment of the present invention, the light penetration and reflection structure is formed in a central area of the surface of the substrate.
In an embodiment of the present invention, the aforementioned optical touch device further includes a second linear light source disposed next to a second side of the sensing area. The second side is configured to be opposite to the first side.
In an embodiment of the present invention, the aforementioned optical touch device further includes a third linear light source and a mirror. The third linear light source is disposed next to a third side of the sensing area. The third side is configured to be connected between the first and second sides. The light sensing component is disposed in a connection area of the second and third sides. The mirror is disposed next to a fourth side of the sensing area. The fourth side is configured to be opposite to the third side.
In an embodiment of the present invention, the aforementioned optical touch device further includes a display panel. The sensing area is formed on a display surface of the display panel.
In an embodiment of the present invention, the aforementioned optical touch device further includes a plate, on which the sensing area is formed.
The present invention further provides a light source assembly of an optical touch device, which includes a linear light source and a light penetration and reflection component. The linear light source is disposed next to a side of a sensing area of the optical touch device. The light penetration and reflection component is disposed between the first linear light source and the side. 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 a plurality of light penetration regions. The prism pillars each are configured to have a length direction parallel to the side. Each prime pillar has at least a reflection surface. The reflection surfaces are included in the reflection regions.
The present invention still provides a light source assembly of an optical touch device, which includes a linear light source and a light penetration and reflection component. The linear light source is disposed next to a side of a sensing area of the optical touch device. The light penetration and reflection component is disposed between the linear light source and the side. The light penetration and reflection component includes a plurality of optical micro-structures. Each optical micro-structure includes a top portion, a bottom portion and at least a reflection surface. The top portion is configured to be opposite to the linear light source. The reflection surface(s) is configured to be connected between the top portion and the bottom portion. At least one of the top portion and the bottom portion has a flat region. Each reflection surface is configured to be titled relative to the flat region(s).
In an embodiment of the present invention, the optical micro-structure is a triangular pillar, a trapezoidal pillar, or a combination of the triangular pillar and the trapezoidal pillar.
In an embodiment of the present invention, the bottom portion of each optical micro-structure is the flat region. The top portion has a plurality of V-shaped grooves. Each V-shaped groove is configured to have two groove walls. The groove walls of the V-shaped grooves are the reflection surface.
In an embodiment of the present invention, the linear light source includes a light guide strip. The top portions of the optical micro-structures are configured to be connected to the light guide strip.
In an embodiment of the present invention, each adjacent two optical micro-structures are configured to be connected to each other.
In an embodiment of the present invention, each adjacent two optical micro-structures are configured to have a distance therebetween.
In summary, the optical touch device according to the embodiments of the present invention is implemented with a conventional optical touch device and a light source assembly, which is constituted by a light penetration and reflection component and an extra linear light source; wherein the linear light source is disposed opposite to the light penetration and reflection component and configured to enhance light source. According to the aforementioned structure, the optical touch device of the present invention can calculate the position coordinate of a touch point (or, a light-blocking object) more accurately so as to solve the blind zone issue. Thus, the optical touch device adopting the light source assembly of the present embodiment avoids the blind zone issue occurring in the conventional optical touch device, and the objects of the developments of the present invention are realized.

BRIEF DESCRIPTION OF THE DRAWINGS

The above embodiments will become more readily apparent to those ordinarily skilled in the art after reviewing the following detailed description and accompanying drawings, in which:

FIG. 1 is a schematic structure view of a conventional optical touch device;

FIG. 2 is a schematic structure view of an optical touch device in accordance with a first embodiment of the present invention;

FIG. 3A is a schematic partial three-dimensional view in a region R of the light penetration and reflection component shown in FIG. 2;

FIG. 3B is a schematic cross-sectional view of the optical touch device along a line E-E in FIG. 2;

FIG. 4 is a schematic view illustrating that the sensing area having a light-blocking object located thereon;

FIG. 5 is a schematic view illustrating light penetration paths and reflection paths associated with a light penetration and reflection component;

FIG. 6 is a schematic structure view of a light penetration and reflection structure in accordance with an embodiment of the present invention;

FIG. 7 is a schematic structure view of a light penetration and reflection structure in accordance with another embodiment of the present invention;

FIG. 8 is a schematic structure view of a light penetration and reflection structure in accordance with another embodiment of the present invention; and

FIG. 9 is a schematic structure view of a light penetration and reflection structure in accordance with another embodiment of the present invention.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

The disclosure will now be described more specifically with reference to the following embodiments. It is to be noted that the following descriptions of preferred embodiments are presented herein for purpose of illustration and description only. It is not intended to be exhaustive or to be limited to the precise form disclosed.
FIG. 2 is a schematic structure view of an optical touch device in accordance with a first embodiment of the present invention. As shown, the optical touch device 200 includes a sensing area 210, a linear light source 220, a light penetration and reflection component 230 and a light sensing component 240. The linear light source 220 is disposed next to a first side 2100 of the sensing area 210. The light penetration and reflection component 230 is disposed between the linear light source 220 and the first side 2100 of the sensing area 210. The light sensing component 240 is configured to have a field of view (FOV) of entire/ or most of the sensing area 210.
FIG. 3A is a schematic partial three-dimensional view in a region R of the light penetration and reflection component 230 shown in FIG. 2. Please refer to FIGS. 2, 3A. The light penetration and reflection component 230 includes a substrate 231 and a light penetration and reflection structure 232 disposed on the substrate 231. The light penetration and reflection structure 232 includes a plurality of prism pillars 2320, each protrudes from a surface 2310 (shown in FIG. 2) of the substrate 231 and configured to be opposite to the linear light source 220. The light penetration and reflection structure 232 includes a plurality of reflection regions 2321 and a plurality of light penetration regions 2322. Each prism pillar 2320 is configured to have a length direction L parallel to the first side 2100 of the sensing area 210. Each prism pillar 2320 has at least one reflection surface 2323, and these reflection surfaces 2323 are includes in the reflection regions 2321 of the prism pillars 2320. The structure of the optical touch device 200 is further described in detail in the following.
Please refer back to FIG. 2. The optical touch device 200 further includes linear light sources 250, 260 and a mirror 270. The linear light source 250 is disposed next to a second side 2500 of the sensing area 210; wherein the second side 2500 is configured to be opposite to the first side 2100. The linear light source 260 is disposed next to a third side 2600 of the sensing area 210; wherein the third side 2600 is configured to be connected between the first side 2100 and the second side 2500. The light sensing component 240 is disposed in a connection area of the second side 2500 and the third side 2600. The mirror 270 is disposed next to a fourth side 2700 of the sensing area 210; wherein the fourth side 2700 is configured to be opposite to the third side 2600. In the embodiment of the optical touch device 200, the linear light sources 220, 260 are configured to emit lights at a same time point and the linear light source 250 is configured to emit lights at another time point. Specifically, the linear light source 250 and the linear light sourcew220, 260 are configured to emit lights alternately. However, it is to be noted that the present invention does not limit the emission mode (or, the emission sequence) of the linear light sourcew220, 250 and 260. In addition, the light penetration and reflection structure 232 is, for example, formed in a central area of the surface 2310 of the substrate 231.
FIG. 3B is a schematic cross-sectional view of the optical touch device 200 along a line E-E in FIG. 2. As shown in FIGS. 2, 3B, the sensing area 210 is an area on a plate 300 and surrounded by the linear light sources 220, 250 and 260, the light penetration and reflection component 230, the mirror 270 and the light sensing component 240. In another embodiment, a display panel (not shown) is disposed on the plate 300 and on which the sensing area 210 is disposed.
FIG. 4 is a schematic view illustrating that the sensing area 210 having a light-blocking object located thereon. FIG. 5 is a schematic view illustrating light penetration paths and reflection paths associated with the light penetration and reflection component 230. It is to be noted that the components/devices illustrated in FIG. 4 are similar to that in FIG. 2, so no any unnecessary detail will be given here. In addition, to prevent the blind zone issue, the optical touch device 200 of the present embodiment further includes the light penetration and reflection component 230 and an extra linear light source (for example, the linear light source 250), compared with the conventional optical touch device 100 shown in FIG. 1; wherein the light penetration and reflection components 230 and the linear light source 250 are configured to be opposite to each other. Moreover, it is to be noted that even the light penetration and reflection components 230 is disposed between the linear light source 220 and the sensing area 210, the lights emitted from the linear light source 220 still can penetrate the light penetration and reflection components 230 through the light penetration regions 2322 thereof (as shown the light penetration paths designated by X in FIG. 5). A light-blocking object C is located in the light sensing area 210, and a corresponding mirroring point C1 is formed on the mirror 270. However, due to the light-blocking object C is located in the blind zone 280, the dark points C2, C3 (respectively derived from the light-blocking object C and the mirroring point C1) may partially overlap. Accordingly, the light sensing component 240 may obtain limited optical information from the overlapped dark points C2, C3. In the structure of the optical touch device 200, because the light penetration and reflection component 230 can also, due to the reflection regions 2321 thereof, function as a mirror, a mirroring point C4 is formed by the light penetration and reflection component 230 when the light-blocking object C is being emitted by the linear light source 250, and simultaneously the lights emitted from the linear light source 250 can be reflected to the light sensing component 240 by the reflection surfaces 2323 of the reflection regions 2321 of the light penetration and reflection component 230 (as shown the reflection paths designated by Y in FIG. 5). Therefore, the light sensing component 240 can further, besides the overlapped dark points C2, C3, obtain the optical information of the dark point C5 according to the lights reflected from the light penetration and reflection component 230. Thus, the light sensing component 240 can, according to the optical information associated with the dark points C2, C3 and C5 (herein, the dark points C2, C3 overlap and are counted as one dark point), calculate the position coordinate of the light-blocking object C on the sensing area 210 more accurately. The means for the calculation of the position coordinate are apparent to those ordinarily skilled in the art; no any unnecessary detail will be given here. In addition, the linear light source 250 in this embodiment as illustrated in FIG. 4 is specifically configured to enhance the lights emitting to the area 280; however, it is understood that the linear light source 250 can be configured to provide lights for the entire sensing area 210 (or, configured to have a structure opposite to the entire second side 2500 of the sensing area 210). Based on the same manner, the light penetration and reflection structure 232 can be configured to have a structure opposite to the entire first side 2100 of the sensing area 210.
The light penetration and reflection structure according to the present invention may have some modulations; followings are the detailed descriptions of the light penetration and reflection structure structures according to various embodiments.
Please refer to FIG. 6, which is a schematic structure view of a light penetration and reflection structure in accordance with an embodiment of the present invention and for a detailed description of the light penetration and reflection structure 232 shown in FIG. 3A. As shown, the light penetration and reflection structure 232 includes a plurality of prism pillars 2320. Each prism pillar 2320 has two reflection surfaces 2323 and a light penetration portion 2324; wherein the two reflection surfaces 2323 are configured to be titled to each other, and the light penetration portion 2324 is configured to be connected between the two reflection surfaces 2323. Each adjacent two prism pillars 2320 are configured to be connected to each other. These light penetration portions 2324 are included in the light penetration regions 2322 shown in FIG. 3A, and each light penetration portion 2324 has, for example, a flat or a curve structure. In particular, each light penetration portion 2324 is configured to have an orthogonal projection area D1 on the surface 2310 of the substrate 231, and each prism pillar 2320 is configured to have an area D2 on the surface 2310 of the substrate 231; wherein 1/20≦D1/D2≦⅕. It is understood that the aforementioned ratio value is only an example in this embodiment, and the ratio value can be modulated based on actual requirements in other embodiments. However, it is to be noted that, if D1/D2 is configured to be smaller than 1/20, the penetrated lights may not be sufficient enough and thereby affecting the sensitivities of the light sensing component 240 detecting the dark points; alternatively, if D1/D2 is configured to be greater than ⅕, the area of the reflection surfaces 2323 may be relatively small and thereby also affecting the sensitivities of the light sensing component 240 detecting the dark points.
FIG. 7 is a schematic structure view of a light penetration and reflection structure in accordance with another embodiment of the present invention. As shown, the light penetration and reflection structure 232 a includes a plurality of prism pillars 2320; wherein the prism pillars 2320 in FIG. 7 each has a structure same as the prism pillar 2320 (constituted by two reflection surfaces 2323 and one light penetration portion 2324) in FIG. 6 has. Specifically, each adjacent two prism pillars 2320 are configured to have a gap 2325 therebetween, and these gaps 2325 are included in the light penetration regions 2322 shown in FIG. 3A. In the light penetration and reflection structure 232 a, each light penetration portion 2324 is configured to have an orthogonal projection area E1 on the surface 2310 of the substrate 231, each prism pillar 2320 is configured to have an area E2 on the surface 2310 of the substrate 231, and each gap 2325 is configured to have an area E3; wherein 1/20≦(E1+E3)/E2≦⅕. It is understood that the aforementioned ratio value is only an example in this embodiment, and the ratio value can be modulated based on actual requirements in other embodiments. However, it is to be noted that, if (E1+E3)/E2 is configured to be smaller than 1/20, the penetrated lights may not be sufficient enough and thereby affecting the sensitivities of the light sensing component 240 detecting the dark points; alternatively, if (E1+E3)/E2 is configured to be greater than ⅕, the area of the reflection surfaces 2323 may be relatively small and thereby also affecting the sensitivities of the light sensing component 240 detecting the dark points.
Please refer to FIG. 8, which is a schematic structure view of a light penetration and reflection structure in accordance with another embodiment of the present invention. As shown, the light penetration and reflection structure 232 b includes a plurality of prism pillars 2320 b. Each prism pillar 2320 b has two reflection surfaces 2323 b, which are configured to be connected and titled to each other. Each adjacent two prism pillars 2320 b are configured to have a gap 2324 b therebetween, and these gaps 2324 b are included in the light penetration regions 2322 in FIG. 3A.
Please refer to FIG. 9, which is a schematic structure view of a light penetration and reflection structure in accordance with another embodiment of the present invention. As shown, the light penetration and reflection structure 232 c includes a plurality of prism pillars 2320 c. Each prism pillar 2320 c has a plurality of V-shaped grooves 2327 on a top surface 2326 thereof; wherein the top surface 2326 is configured to be opposite to a linear light source (for example, the linear light source 220 in FIG. 2). Each V-shaped groove 2327 has two groove walls 2328. The groove walls 2328 associated with a same prism pillar 2320 c are included in a reflection surface 2323 c of the associated prism pillar 2320 c. In addition, the light penetration and reflection structure 232 c further includes a plurality of platforms 2329, each is configured to protrude from the surface 2310 of the substrate 231 opposite to the linear light source 200. The platforms 2329 and the prism pillars 2320 c are arranged alternatively on the surface 2310. In addition, the platforms 2329 are included in the light penetration regions 2322 shown in FIG. 3A.
According to the aforementioned various light penetration and reflection structures disclosed in the embodiments illustrated in FIGS. 6, 7, 8 and 9, each light penetration and reflection structure includes a plurality of prism pillars; wherein the prism pillar herein is defined as an optical micro-structure. In the embodiments, each optical micro-structure includes a top portion, a bottom portion and at least one reflection surface; wherein the top portion is configured to be opposite to a linear light source (for example, the linear light source 220 in FIG. 2) and the reflection surface is configured to be connected to the top portion and the bottom portion. At least one of the top and bottom portions includes a flat region, and the reflection surface is configured to be tilted relative to the flat region. For example, in the embodiments illustrated in FIGS. 6, 7, the optical micro-structure (or, the prism pillar 2320) in the light penetration and reflection structures 232, 232 a is a trapezoidal pillar structure and the top and bottom portions thereof both have a flat region. In the embodiment illustrated in FIG. 8, the optical micro-structure (or, the prism pillar 2320 b) of the light penetration and reflection structure 232 b is a triangle pillar structure and the bottom portion thereof has a flat region. In the embodiment illustrated in FIG. 9, the optical micro-structure (or, the prism pillar 2320 c) of the light penetration and reflection structure 232 c is a structure having a flat region on its bottom portion and a plurality of V-shaped grooves on its top portion; wherein the V-shaped grooves includes a plurality of groove walls, each serves as a reflection surface. In addition, the various light penetration and reflection structures disclosed in the aforementioned embodiments each is disposed between a linear light source (for example, the linear light source 220 in FIG. 2) and one side of a sensing area (for example, the sensing area 210 in FIG. 2); wherein the linear light source includes a light guide strip, and the prism pillars (or, the optical micro-structures) of the light penetration and reflection structure each is configured to have its top portion connected to the light guide strip.
In the aforementioned embodiments, the light penetration and reflection component 230 is exemplified by having the light penetration and reflection structures 232, 232 a, 232 b or 232 c disposed on the substrate 231. In another embodiment, the light penetration and reflection component 230 may include the light penetration and reflection structure only without the substrate 231. It is to be noted that the light penetration and reflection component 230 without the substrate 231 still can provide full functions as the light penetration and reflection component 230 with the substrate 231 does.
Moreover, the light penetration and reflection component 230 and the linear light source 220 in the embodiments can be referred to as a light source assembly.
In summary, the optical touch device according to the embodiments of the present invention is implemented with a conventional optical touch device and a light source assembly, which is constituted by a light penetration and reflection component and an extra linear light source; wherein the linear light source is disposed opposite to the light penetration and reflection component and configured to enhance light source. According to the aforementioned structure, the optical touch device of the present invention can calculate the position coordinate of a touch point (or, a light-blocking object) more accurately so as to solve the blind zone issue. Thus, the optical touch device adopting the light source assembly of the present embodiment avoids the blind zone issue occurring in the conventional optical touch device, and the objects of the developments of the present invention are realized.
While the disclosure has been described in terms of what is presently considered to be the most practical and preferred embodiments, it is to be understood that the disclosure needs not be limited to the disclosed embodiment. On the contrary, it is intended to cover various modifications and similar arrangements included within the spirit and scope of the appended claims which are to be accorded with the broadest interpretation so as to encompass all such modifications and similar structures.

Claims

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 A1 on the surface of the substrate, the prism pillar is configured to have an area A2 on the surface of the substrate, and 1/20≦A1/A2≦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 A1 on the surface of the substrate, the prism pillar is configured to have an area A2 on the surface of the substrate, the gap is configured to have an area of A3, and 1/20≦(A1/A3)/A2≦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 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.