CN201628944U - Optical touch screen - Google Patents
Optical touch screen Download PDFInfo
- Publication number
- CN201628944U CN201628944U CN2009202469969U CN200920246996U CN201628944U CN 201628944 U CN201628944 U CN 201628944U CN 2009202469969 U CN2009202469969 U CN 2009202469969U CN 200920246996 U CN200920246996 U CN 200920246996U CN 201628944 U CN201628944 U CN 201628944U
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- light source
- touch screen
- optical sensor
- optical
- laser light
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Abstract
The utility model discloses an optical touch screen, which comprises an optical sensor, a light source and a touch surface. The light source is mounted near the optical sensor, and the light source is a laser source. The optical touch screen uses the laser light source to substitute an infrared light source, and overcomes the shortages that the position near the optical sensor of an existing optical touch screen is unable to realize accurate positioning for a touch article.
Description
Technical field
The utility model belongs to field of photoelectric technology, relates in particular to a kind of optical touch screen.
Background technology
Development along with multimedia information technology, people use human-computer interaction devices such as optical touch screen more and more, optical touch screen based on optical technology has obtained application more and more widely, 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, infrared light supply 103 and touch-surface 104, when striking takes place in touch objects 105 on touch-surface 104, will stop the infrared light 106 that infrared light supply 103 is launched, produce shade 107 on the leg of frame, optical sensor 102 just can calculate the position of touch objects 105 by shade 107.But, when touch objects 105 is positioned near optical sensor 102, position as 105 places of touch objects among Fig. 2, because the surface of touch objects 105 can be reflected infrared light 106, a part of infrared light 106 after being reflected can be accepted by optical sensor 103, thereby disturbed the location to shade 107 of optical sensor 103, can not realize accurately location the position of touch objects 105.
The utility model content
At problems of the prior art, the utility model provides a kind of also can realize the accurately optical touch screen of location to touch objects near optical sensor, described optical touch screen comprises optical sensor, light source and touch-surface, described light source be installed in described optical sensor near, described light source is a LASER Light Source.
According to an aspect of the present utility model, described LASER Light Source is installed in the upper surface of described optical sensor.
According to an aspect of the present utility model, also be fixed with a shadow shield on the upper surface of described optical sensor, described shadow shield extends to the visual field of described optical sensor direction, the upper surface of described shadow shield and described optical sensor is made of one, perhaps the lower surface with described light source is made of one, or an independent shadow shield.
According to an aspect of the present utility model, described LASER Light Source is positioned on the described shadow shield.
According to an aspect of the present utility model, the place ahead of described LASER Light Source is equipped with lens combination.
According to an aspect of the present utility model, the place ahead of described LASER Light Source is equipped with lens or lens combination, is used to increase laser that described LASER Light Source launches perpendicular to the light distribution on the described touch-surface direction.
According to an aspect of the present utility model, described lens combination includes prismatic mirror, is used to increase laser that described LASER Light Source launches in the light distribution that is parallel on the described touch-surface direction.
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 structural representation of the defective that exists in the optical touch screen shown in Figure 1;
Fig. 3 is the structural representation of a kind of embodiment of optical touch screen described in the utility model;
Fig. 4 is the three-dimensional structure diagram of the position relation of LASER Light Source and optics camera in the optical touch screen shown in Figure 3;
Fig. 5 is better than the light path synoptic diagram of infrared light supply for proof optical touch screen shown in Figure 3 uses LASER Light Source;
Fig. 6 is the structural representation to the structural a kind of prioritization scheme of the described optical touch screen of the utility model embodiment;
Fig. 7 is the light path front view to a kind of prioritization scheme of LASER Light Source in the described optical touch screen of the utility model embodiment; And
Fig. 8 is the light path vertical view to a kind of prioritization scheme of LASER Light Source in the described optical touch screen of the utility model embodiment.
Embodiment
The utility model is described in further detail below in conjunction with specification drawings and specific embodiments, and 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, will not illustrate or brief description below, as the positioning principle of optical touch screen etc., only at length feature structure of the present utility model is described.
Be illustrated in figure 3 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 and touch-surface 104, optical sensor 102 is installed in any two the adjacent corners on the framework 101, touch-surface 104 is positioned at the central authorities of framework 101, and the visual field of two optical sensors 102 can both cover whole touch-surface 104 fully.Unlike the prior art, in this optical touch screen, used LASER Light Source 301, LASER Light Source 301 be installed in optical sensor 102 near.Corresponding with LASER Light Source 301, optical sensor 201 can be common camera, infrared camera, laser sensor etc.In actual applications, generally LASER Light Source 301 is fixed on the upper surface 1021 of optical sensor 102 and gets final product, specifically can be with reference to Fig. 4.
Touch objects 105 (as user's finger) is learned sensor 102 places and touch-surface 104 generation strikings at dipped beam, as shown in Figure 5.As light source 501 is infrared light supply, when infrared light 106 is transferred to touch objects 105, can illuminate the AB zone on touch objects 105 surfaces, because there is emission angle in the infrared light 106 that infrared light supply is launched, then can after the AB regional reflex on touch objects 105 surfaces, be received by some infrared light 106, disturbed the location of optical sensor 102 by optical sensor 102.As this light source 501 is changed to LASER Light Source, then can weaken or eliminate this shortcoming.LASER Light Source institute emitted laser high directivity, it is very little to disperse solid angle, be the milliradian magnitude, little 2～3 orders of magnitude of the angle of divergence than normal optical or microwave, comparing with the emission angle of infrared light can be little a lot, so when the laser 502 that is sent by light source 501 is transferred to touch objects 105, the scope that illuminates the CD zone on touch objects 105 surfaces is compared less with the scope in above-mentioned AB zone, just reduced the scope of reflector space, thereby reduced the probability that laser 502 is received by optical sensor 102 after touch objects 105 reflections, reduced interference, and then promoted the accuracy of detection of whole optical touch screen at optical sensor 102 near zones to the location of optical sensor 102.
Be illustrated in figure 6 as structural representation to the structural a kind of prioritization scheme of the described optical touch screen of the utility model embodiment, optical sensor 102 is fixed on the framework 101 of optical touch screen, LASER Light Source 301 is fixed on the upper surface 1021 of optical sensor 102, on the upper surface 1021 of optical sensor 102, also be fixed with a shadow shield 601, this shadow shield 601 extends to the visual field of optical sensor 102 direction, this shadow shield 601 can be made of one with the upper surface of optical sensor 102, also can be made of one with the lower surface of LASER Light Source 301, it can also be an independent shadow shield, this shadow shield 601 can make the emission angle of the laser 502 that LASER Light Source 301 launches narrow down to ∠ β by ∠ α, further reduce the possibility that 301 emitted laser 502 of LASER Light Source are received by optical sensor 102 after the surface reflection of the thing 105 that is touched, further reduce the interference of reflection ray of knowing clearly optical sensor 102 location.
As Fig. 7, Figure 8 shows that index path to a kind of prioritization scheme of LASER Light Source in the described optical touch screen of the utility model embodiment, in order to optimize the light distribution of LASER Light Source 301, can lens combination 701 be installed in the place ahead of this LASER Light Source 301 (direction of LASER Light Source emission laser), lens combination 701 is made of concavees lens 7011 and prismatic mirror 7012, and concavees lens 7011 are between LASER Light Source 301 and prismatic mirror 7012.Concavees lens 7011 are used to increase laser 502 perpendicular to the light distribution on touch-surface 104 directions, improve too smallly because of laser 502 emission angle, are unfavorable for the shortcoming of optical touch screen debugging.Wherein, concavees lens 7011 also can replace with other lens or the lens combination that play same function.Laser 502 transfers to post mirror 7012 after through concavees lens 7011 gains, post mirror 7012 is used to increase laser 502 in the light distribution that is parallel on touch-surface 104 directions, increases the reach of laser 502 on touch-surface 104.
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 (6)
1. optical touch screen, this optical touch screen comprises optical sensor, light source and touch-surface, described light source be installed in described optical sensor near, it is characterized in that: described light source is a LASER Light Source.
2. optical touch screen as claimed in claim 1 is characterized in that: described LASER Light Source is installed in the upper surface of described optical sensor.
3. optical touch screen as claimed in claim 2, it is characterized in that: also be fixed with a shadow shield on the upper surface of described optical sensor, described shadow shield extends to the visual field of described optical sensor direction, the upper surface of described shadow shield and described optical sensor is made of one, perhaps the lower surface with described light source is made of one, or an independent shadow shield.
4. optical touch screen as claimed in claim 3 is characterized in that: described LASER Light Source is positioned on the described shadow shield.
5. as the described optical touch screen of one of claim 1 to 4, it is characterized in that: the place ahead of described LASER Light Source is equipped with lens or lens combination, is used to increase laser that described LASER Light Source launches perpendicular to the light distribution on the described touch-surface direction.
6. optical touch screen as claimed in claim 5 is characterized in that: described lens combination includes prismatic mirror, is used to increase laser that described LASER Light Source launches in the light distribution that is parallel on the described touch-surface direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202469969U CN201628944U (en) | 2009-11-13 | 2009-11-13 | Optical touch screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202469969U CN201628944U (en) | 2009-11-13 | 2009-11-13 | Optical touch screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201628944U true CN201628944U (en) | 2010-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202469969U Expired - Fee Related CN201628944U (en) | 2009-11-13 | 2009-11-13 | Optical touch screen |
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| Country | Link |
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| CN (1) | CN201628944U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102156593A (en) * | 2011-04-13 | 2011-08-17 | 中国科学院深圳先进技术研究院 | Optical touch screen and touch positioning method thereof |
| CN104536240A (en) * | 2010-12-02 | 2015-04-22 | 宁波舜宇光电信息有限公司 | Optical touch screen camera assembly and manufacturing method thereof |
| CN109143734A (en) * | 2010-12-02 | 2019-01-04 | 宁波舜宇光电信息有限公司 | A kind of optical touch screen camera shooting mould group and its manufacturing method |
-
2009
- 2009-11-13 CN CN2009202469969U patent/CN201628944U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104536240A (en) * | 2010-12-02 | 2015-04-22 | 宁波舜宇光电信息有限公司 | Optical touch screen camera assembly and manufacturing method thereof |
| CN109143734A (en) * | 2010-12-02 | 2019-01-04 | 宁波舜宇光电信息有限公司 | A kind of optical touch screen camera shooting mould group and its manufacturing method |
| CN109143733A (en) * | 2010-12-02 | 2019-01-04 | 宁波舜宇光电信息有限公司 | A kind of optical touch screen camera shooting mould group and its manufacturing method |
| CN102156593A (en) * | 2011-04-13 | 2011-08-17 | 中国科学院深圳先进技术研究院 | Optical touch screen and touch positioning method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Beijing Irtouch Systems Co.,Ltd. Document name: Notification to Pay the Fees |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101110 Termination date: 20181113 |
|
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Tang Haibo Document name: Notification of Termination of Patent Right |