CN201611476U - Optical touch screen - Google Patents
Optical touch screen Download PDFInfo
- Publication number
- CN201611476U CN201611476U CN2009202774957U CN200920277495U CN201611476U CN 201611476 U CN201611476 U CN 201611476U CN 2009202774957 U CN2009202774957 U CN 2009202774957U CN 200920277495 U CN200920277495 U CN 200920277495U CN 201611476 U CN201611476 U CN 201611476U
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- edge
- retroreflecting
- module
- touch screen
- optical touch
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Abstract
The utility model discloses an optical touch screen, which comprises a frame, an optical sensor, a light source and a retroreflecting strip; the frame is composed of a first edge, a second edge, a third edge and a fourth edge; the first edge is oppoiste to the third edge; the second edge is oppoiste to the fourth edge; the optical sensor is mounted in the positions of two included angles composed of the first edge and the second edge as well as the fourth edge, and/or on the first edge; a retroreflecting module is mounted on the third edge, each ray entering the retroreflecting module and generated by the light source only can form a projection and generate retroreflection in the retroreflecting module; and retroreflecting strips are mounted on the third edge in the area where the retroreflecting module is not mounted. The optical touch screen has higher detection precision due to installation of the retroreflecting module.
Description
Technical field
The utility model relates to a kind of touch-screen, relates in particular to a kind of optical touch screen.
Background technology
Along with the development of multimedia information technology, people use human-computer interaction devices such as touch-screen more and more, have obtained application more and more widely based on the optical touch screen of optical technology.As shown in Figure 1, structural representation for a kind of optical touch screen of the prior art, this optical touch screen comprises framework 101, optical sensor 102, light source 103, retroreflecting bar 104 and touch-surface 105, framework 101 is by first edge 1011, second edge 1012, the 3rd edge 1013, the 4th edge 1014 constitutes, framework 101 is a rectangular frame, first edge 1011 and the 3rd edge 1013 are two long limits of framework 101, second edge 1012 and the 4th edge 1014 are two short limits of framework 101, when striking takes place in touch objects 106 on touch-surface 105, will stop the light 107 that light source 103 is launched, produce shade 108 on retroreflecting bar 104, optical sensor 102 is by analyzing the position that shade 108 just can calculate touch objects 106.Because can only being not less than 45 incident raies of spending to incident angle, retroreflecting bar 104 can realize retroreflecting efficiently, when spending less than 45, the incident angle of light 107 arrival retroreflecting bars 104 is difficult to by retroreflecting, interference has been caused in location to optical sensor 102, causes near subregion (positions at touch objects 106 places as Fig. 2, Fig. 3 as shown in) accuracy of detection of this optical touch screen the 3rd edge 1013 low.
The utility model content
At problems of the prior art, the utility model provides a kind of accuracy of detection high optical touch screen, this optical touch screen comprises framework, optical sensor, light source and retroreflecting bar, described rectangular frame is by first edge, second edge, the 3rd edge, the 4th edge constitutes, described first edge is relative with described the 3rd edge, described second edge is relative with described the 4th edge, optical sensor is installed in first edge and second edge, on two angles and/or first edge that the 4th edge is constituted, on described the 3rd edge, the retroreflecting module is installed, every the light launched by described light source that incides described retroreflecting module can only generate a projection and retroreflecting takes place in described retroreflecting module, in described the 3rd edge is not equipped with the zone of described retroreflecting module described retroreflecting bar is not installed.
According to an aspect of the present utility model, described retroreflecting module is and the acutangulate retroreflecting bar in described the 3rd edge.
According to an aspect of the present utility model, described retroreflecting module is an arc retroreflecting bar.
According to an aspect of the present utility model, described retroreflecting module is serrate and/or waveform retroreflecting bar.
According to an aspect of the present utility model, described framework is a rectangular frame, the length at described first edge and described the 3rd edge is x, and the length at described second edge and described the 4th edge is y, and described retroreflecting module is installed in two end regions at described the 3rd edge.
According to an aspect of the present utility model, on described second edge and described the 4th edge, described retroreflecting bar is installed.
According to an aspect of the present utility model, described retroreflecting module is integrated into the retroreflecting bar that is installed in the 3rd edge.
According to an aspect of the present utility model, described light source is an infrared light supply, and described optical sensor is an infrared camera.
According to an aspect of the present utility model, be provided with the infrared absorption filter striation in the place ahead at described the 3rd edge.
Others of the present utility model and/or advantage part are in the following description described, and wherein part is conspicuous in this explanation, perhaps can be by learning in the practice of the present utility model.
Description of drawings
Fig. 1 is the structural representation of a kind of optical touch screen of the prior art;
Fig. 2 is the position view in the low accuracy of detection zone, a place in the optical touch screen shown in Figure 1;
Fig. 3 is the position view in another the accuracy of detection zone, place in the optical touch screen shown in Figure 1;
Fig. 4 is the structural representation of a kind of embodiment of optical touch screen described in the utility model;
Fig. 5 is that a kind of embodiment of the retroreflecting module in the optical touch screen shown in Figure 4 is installed in the structural representation on the optical touch screen;
Fig. 6 is that the another kind of embodiment of the retroreflecting module in the optical touch screen shown in Figure 4 is installed in the structural representation on the optical touch screen;
Fig. 7 is that the third embodiment of the retroreflecting module in the optical touch screen shown in Figure 4 is installed in the structural representation on the optical touch screen; And
Fig. 8 is the structural representation to a kind of prioritization scheme of optical touch screen shown in Figure 4.
Embodiment
The utility model will be further described below in conjunction with specification drawings and specific embodiments.
To begin the detailed description of embodiment of the present utility model below, according to corresponding description of drawings embodiment, wherein identical in the whole text Reference numeral refers to components identical.Below will by with reference to description of drawings embodiment to explain the utility model.
Although known part or element are important to the utility model, but will not illustrate or brief description below, as annexation between the inside important structure assembly of existing optical touch screen and positioning principle thereof etc., only at length feature structure of the present utility model is described.
Be illustrated in figure 4 as the structural representation of a kind of embodiment of optical touch screen described in the utility model, this optical touch screen comprises framework 101, optical sensor 102, light source 103, retroreflecting bar 104 and touch-surface 105, framework 101 is by first edge 1011, second edge 1012, the 3rd edge 1013, the 4th edge 1014 constitutes, first edge 1011 is relative with the 3rd edge 1013, second edge 1012 is relative with the 4th edge 1014, optical sensor 102 is installed in first edge 1011 and second edge 1012, on two angles and/or first edge 1011 that the 4th edge 1014 is constituted, on the 3rd edge 1013, retroreflecting module 401 is installed, every the light 107 launched by light source 103 that incides retroreflecting module 401 can only generate a projection and retroreflecting takes place in retroreflecting module 401, in the 3rd edge 1013 is not equipped with the zone of retroreflecting module 401, retroreflecting bar 104 is not installed, on second edge 1012 and the 4th edge 1014, retroreflecting bar 104 is installed also.Wherein, framework 101 is a rectangular frame, and the length at first edge 1011 and the 3rd edge 1013 is x, and the length at second edge 1012 and the 4th edge 1014 is y, and x＞y＞0.As a kind of embodiment of the best, retroreflecting module 401 is installed in the x-y zone at 1013 two ends, the 3rd edge.This optical touch screen by in the x-y zone at 1013 two ends, the 3rd edge of framework 101 just angle of incidence of light install less than the zones of 45 degree and return reflecting module 401 and strengthen the retroreflecting effect of this zone incident ray, thereby improved the accuracy of detection of this optical touch screen, and then improved the accuracy of detection of whole optical touch screen at the 3rd edge 1013 near zones.In actual applications, for the ease of assembling, can make the length of each retroreflecting module 401 be a bit larger tham x-y.Simultaneously, the length of each retroreflecting module 401 also can be less than x-y, this retroreflecting module 401 can be installed in the optional position in the x-y zone at 1013 two ends, the 3rd edge, and the concrete length of this retroreflecting module 401 and installation site thereof can be debugged the requirement of the accuracy of detection of this optical touch screen according to the user.As a kind of preferred, the length limit ratio of the framework 101 of this optical touch screen is 16: 9, i.e. x: y=16: 9; Light source 103 can be infrared light supply, and optical sensor 102 can be infrared camera.
A kind of embodiment that is illustrated in figure 5 as the retroreflecting module 401 in the optical touch screen shown in Figure 4 is installed in the structural representation on the optical touch screen, and this retroreflecting module 401 is and the 3rd edge 1013 acutangulate retroreflecting bars.In actual applications, this retroreflecting module 401 and the retroreflecting bar 104 that is installed in the 3rd edge can be integrated into.
The another kind of embodiment that is illustrated in figure 6 as the retroreflecting module 401 in the optical touch screen shown in Figure 4 is installed in the structural representation on the optical touch screen, and this retroreflecting module 401 is an arc retroreflecting bar.In actual applications, this retroreflecting module 401 and the retroreflecting bar 104 that is installed in the 3rd edge can be integrated into.
The third embodiment that is illustrated in figure 7 as the retroreflecting module 401 in the optical touch screen shown in Figure 4 is installed in the structural representation on the optical touch screen, and this retroreflecting module 401 is serrate or waveform retroreflecting bar.Simultaneously, also can have sawtooth and wave-like simultaneously in this retroreflecting module 401.In actual applications, this retroreflecting module 401 and the retroreflecting bar 104 that is installed in the 3rd edge can be integrated into.
Be illustrated in figure 8 as structural representation to a kind of prioritization scheme of optical touch screen shown in Figure 3, this optical touch screen is equipped with the infrared absorption filter striation in the place ahead at the 3rd edge 1013 of framework 101 (towards the direction of touch-surface 105), is used to block the vision flaw that is caused because of retroreflecting module 401.
Although embodiment of the present utility model has been made comparatively detailed explanation and description, but those skilled in the art should understand under the situation that does not break away from the utility model spirit and principle and can change these embodiments that its scope definition in the claims.
Claims (9)
1. optical touch screen, comprise framework, optical sensor, light source and retroreflecting bar, described rectangular frame is by first edge, second edge, the 3rd edge, the 4th edge constitutes, described first edge is relative with described the 3rd edge, described second edge is relative with described the 4th edge, optical sensor is installed in first edge and second edge, on two angles and/or first edge that the 4th edge is constituted, it is characterized in that: on described the 3rd edge, the retroreflecting module is installed, every the light launched by described light source that incides described retroreflecting module can only generate a projection and retroreflecting takes place in described retroreflecting module, in described the 3rd edge is not equipped with the zone of described retroreflecting module described retroreflecting bar is not installed.
2. optical touch screen as claimed in claim 1 is characterized in that: described retroreflecting module is and the acutangulate retroreflecting bar in described the 3rd edge.
3. optical touch screen as claimed in claim 1 is characterized in that: described retroreflecting module is an arc retroreflecting bar.
4. optical touch screen as claimed in claim 1 is characterized in that: described retroreflecting module is serrate and/or waveform retroreflecting bar.
5. as the described optical touch screen of one of claim 1 to 4, it is characterized in that: described framework is a rectangular frame, and described retroreflecting module is installed in two end regions at described the 3rd edge.
6. optical touch screen as claimed in claim 5 is characterized in that: on described second edge and described the 4th edge described retroreflecting bar is installed.
7. optical touch screen as claimed in claim 5 is characterized in that: described retroreflecting module is integrated into the retroreflecting bar that is installed in the 3rd edge.
8. optical touch screen as claimed in claim 5 is characterized in that: described light source is an infrared light supply, and described optical sensor is an infrared camera.
9. optical touch screen as claimed in claim 8 is characterized in that: be provided with the infrared absorption filter striation in the place ahead at described the 3rd edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202774957U CN201611476U (en) | 2009-11-30 | 2009-11-30 | Optical touch screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202774957U CN201611476U (en) | 2009-11-30 | 2009-11-30 | Optical touch screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201611476U true CN201611476U (en) | 2010-10-20 |
Family
ID=42962109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202774957U Expired - Fee Related CN201611476U (en) | 2009-11-30 | 2009-11-30 | Optical touch screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201611476U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102541361A (en) * | 2010-11-17 | 2012-07-04 | 昕兴时乐股份有限公司 | Object sensing device |
| CN109428966A (en) * | 2017-08-22 | 2019-03-05 | 西安中兴新软件有限责任公司 | A kind of control method of mobile terminal, laser carving method and screen backlight |
-
2009
- 2009-11-30 CN CN2009202774957U patent/CN201611476U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102541361A (en) * | 2010-11-17 | 2012-07-04 | 昕兴时乐股份有限公司 | Object sensing device |
| CN109428966A (en) * | 2017-08-22 | 2019-03-05 | 西安中兴新软件有限责任公司 | A kind of control method of mobile terminal, laser carving method and screen backlight |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101020 Termination date: 20181130 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| DD01 | Delivery of document by public notice |
Addressee: BEIJING IRTOUCH SYSTEMS Co.,Ltd. Document name: Notification of Termination of Patent Right |
|
| DD01 | Delivery of document by public notice |