CN201583924U - Infrared touch screen - Google Patents
Infrared touch screen Download PDFInfo
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- CN201583924U CN201583924U CN2009202105248U CN200920210524U CN201583924U CN 201583924 U CN201583924 U CN 201583924U CN 2009202105248 U CN2009202105248 U CN 2009202105248U CN 200920210524 U CN200920210524 U CN 200920210524U CN 201583924 U CN201583924 U CN 201583924U
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- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 28
- 230000035945 sensitivity Effects 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 13
- 230000010365 information processing Effects 0.000 abstract 7
- 230000003287 optical effect Effects 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model relates to an infrared touch screen, which comprises a liquid crystal panel and a backlight module, wherein the backlight module is provided with an infrared light source and is also provided with an optical conducting assembly which can conduct infrared rays sent by the infrared light source to the front of the liquid crystal panel, and photosensitive elements for sensing the infrared rays are distributed on the backlight module; and the photosurface of the photosensitive element is arranged toward the front of the liquid crystal panel. The infrared touch screen also comprises an information processing system for judging touch positions, wherein the information processing system is connected with the photosensitive elements, and electrical signals generated by the photosensitive elements are transmitted to the information processing system; and the information processing system obtains touch position information by analyzing the electrical signals generated by the photosensitive elements. The information processing system adopts a multi-point touch information processing system capable of processing multi-point touch operation, and the multi-point touch information processing system is connected with the photosensitive elements. The utility model has the characteristics of low cost, stable performance and the like, is suitable for large-area displays, and can be better applied to the multi-point touch technology.
Description
Technical field
The utility model relates to a kind of touch-screen, is specifically related to a kind of infrared touch panel.
Background technology
Popular touch-screen mainly comprises resistive touch screen, infrared touch panel on the market now.Present production technology is produced the less resistive touch screen of area than being easier to, and is difficult to produce the resistive touch screen more than 25 cun.Range of application mainly is that mobile phone, palm PC, net book etc. are equipped with the equipment than the small screen.Along with the increase of resistive touch screen area, cost can sharply rise, and performance is difficult to ensure.On the large screen display of popularizing day by day, resistive touch screen is adopted in inconvenience now.In addition, resistive touch screen itself is relatively more fragile, is easy to by scratch, does not cause damage.As seen resistive touch screen has been subjected to many restrictions in actual use.
Existing infrared touch panel with respect to other touch-screens, has stable performance, series of advantages such as antijamming capability is strong, the life-span is long, precision height.Almost, capture the market of other touch-screens gradually with overwhelming advantage.But infrared touch panel still has a fatefulue weakness to be difficult to overcome, and is exactly that infrared window is afraid of dirty.Should not use at uncleanly environment, such as not being applied in the heavier occasions of greasy dirt such as factory floor, mining area; Such as not being applied in open public arena such as train Waiting Lounge, extramural cash dispenser.Will adorn infrared correlation pipe in the screen outside in addition, have influence on the compactedness of structure, inconvenience is adopted on the small-sized screen, is used in as inconvenience on the screen of mobile phone and palm PC.
The multiple point touching technology begins to be subjected to extensive concern now, and progressively popularizes, and Windows 7 operating systems that Microsoft is up-to-date can be supported multi-touch function.But existing resistive touch screen, infrared touch panel all can not well be applied to the multiple point touching technology.
We need a kind of cost low, be applicable to large area display, stable performance, can be good at being applied to the touch-screen of multiple point touching technology.
The utility model content
The purpose of this utility model is, a kind of infrared touch panel is provided, have cost low, be applicable to large area display, stable performance, can be good at being applied to characteristics such as multiple point touching technology.
The technical matters that the utility model solved can realize by the following technical solutions:
A kind of infrared touch panel, comprise a liquid crystal panel, described liquid crystal panel rear is provided with module backlight, it is characterized in that, described module backlight is provided with infrared light supply, also is provided with the optics conducting subassembly that the infrared ray that described infrared light supply is sent conducts to liquid crystal panel the place ahead;
Be placed with on the described module backlight and be used to respond to ultrared light activated element, the light-sensitive surface of described light activated element is towards the place ahead of described liquid crystal panel;
Comprise that also one judges the information handling system of touch location, described information handling system connects described light activated element, the electric signal that light activated element produces is sent to information handling system, and information handling system obtains touching position information by analyzing the electric signal that light activated element produces.
In the above-mentioned design, infrared light supply arrives liquid crystal panel the place ahead by the optics conducting subassembly with infrared.When liquid crystal panel not being touched, the less of reflection takes place in infrared ray, has only the small part infrared ray to turn back to the light activated element place and received by light activated element.Under the lower situation of the infra-red intensity of light activated element reception, information handling system is considered as not taking place touch operation.
When a kind of infrared touch panel is touched, staff, felt pen, perhaps other touch part, can produce reflection to infrared ray, so that the infra-red intensity that light activated element receives strengthens relatively.Information handling system is considered as having taken place touch operation, and according to the relative position that receives the light activated element that infra-red intensity strengthens, judges the position of carrying out touch operation.
Described information handling system is provided with one and adjusts the sensitivity adjustment module that receives the light activated element signal sensitivity.Adjust to when higher will receiving the light activated element signal sensitivity by the sensitivity adjustment module, staff, felt pen, when perhaps other touch parts and do not touch a kind of infrared touch panel, the infrared signal intensity of its reflected back can make described information handling system response, and then finishes touch operation.Therefore the utility model allows with under the situation that a kind of infrared touch panel contacts do not finish contactless touch operation.
The reflecting piece of described module backlight is provided with light hole, and described light hole rear is provided with light activated element.By above-mentioned design light activated element is set to the rear of reflector, arranging of light activated element can not influence the reflecting effect of reflector, can effectively avoid because the light activated element of having arranged causes the uneven phenomenon of liquid crystal panel glazed thread.
Described infrared light supply can adopt various ways.Infrared light supply can adopt the infrared light supply of strip, and the infrared light supply of strip is positioned at, the visible light strip light source installation place of the light guide plate of module backlight.By light guide plate the infrared ray that infrared light supply sends is conducted more uniformly to liquid crystal panel the place ahead.In ultrared conductive process, also can be not described in detail through other devices of module backlight.More than this structure can directly use original module backlight, basically can be advance the structure row and change original module backlight.Help to save cost.
Described infrared light supply can adopt infrarede emitting diode, and described infrarede emitting diode is arranged on the described module backlight, and light emission direction is towards the place ahead of described liquid crystal panel.Above structure, it is more even to help making Infrared to distribute, and then make information handling system to the position that touches determine more accurate.
The infrarede emitting diode parallel arranged of a described light activated element and a close together constitutes a reflection infrared sensor.Light activated element is provided with the infrarede emitting diode of collocation with it, helps improving the sensitivity of a kind of infrared touch panel to the touch operation induction, and the precision of touch operation.
Distance between each described reflection infrared sensor is greater than the distance of light activated element in the described reflection infrared sensor and infrarede emitting diode.In order to avoid the light that the infrarede emitting diode in reflection infrared sensor sends produces considerable influence to the light activated element of other adjacent reflection infrared sensors.Help improving the precision of touch operation.
Described information handling system adopts the multiple point touching information handling system that can handle the multiple point touching operation, and described multiple point touching information handling system connects described light activated element.Obviously, a plurality of light activated elements in the utility model are the line output electric signal also, can support that in information handling system under the situation of multiple point touching, the utility model just can be realized multiple point touching.Can handle the multiple point touching information handling system of multiple point touching operation, be prior art, is applied to multiple point touching information handling system of the present utility model and can adopts existing basic framework, therefore do not do detailed description.
The a large amount of light activated elements that use in the utility model can be integrated on the plate, and the cost of plate that is integrated with the light activated element that is not very intensive is lower, and therefore cost of the present utility model is also lower.Existing technology allows a large amount of light activated elements are integrated on the plate more than 50 cun, therefore adopts the technology described in the utility model, can produce multi-point touch panel more than 50 cun with lower price.Infrared light supply and light activated element are hidden in the liquid crystal panel back, are not vulnerable to external interference and compact conformation.
As seen from the above technical solution, the utlity model has cost low, be applicable to large area display, stable performance, can be good at being applied to characteristics such as multiple point touching technology.
Description of drawings
Fig. 1 is a kind of a kind of one-piece construction synoptic diagram of infrared touch panel;
Fig. 2 is a kind of reflection infrared sensor arrangement figure of infrared touch panel;
Fig. 3 is a kind of information handling system circuit principle structure figure of infrared touch panel;
Fig. 4 is a kind of light activated element arrangement figure of infrared touch panel.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose with effect is easy to understand, below in conjunction with the further elaboration the utility model of concrete diagram.
With reference to Fig. 1, a kind of infrared touch panel comprises a liquid crystal panel 1, and liquid crystal panel 1 rear is provided with module 2 backlight.Module 2 backlight generally comprises diffusion sheet 21, upward cover 26, reflecting piece 27, module frame 28 are penetrated in light-collecting piece 22, following light-collecting piece 23, following diffusion sheet 24, light guide plate 25, additional issue.
With reference to Fig. 1, Fig. 2, module 2 backlight is provided with infrared light supply 3, also is provided with the optics conducting subassembly that the infrared ray that infrared light supply 3 is sent conducts to liquid crystal panel 1 the place ahead.The optics conducting subassembly can adopt the existing device of module backlight 2 itself.Be placed with on the module 2 backlight and be used to respond to ultrared light activated element 4, the light-sensitive surface of light activated element 4 is towards the place ahead of liquid crystal panel 1.
With reference to Fig. 3, comprise that also one judges the information handling system 5 of touch location, information handling system 5 connects light activated element 4, and the electric signal that light activated element 4 produces is sent to information handling system 5, information handling system 5 obtains touching position information by analyzing the electric signal that light activated element 4 produces.In the above-mentioned design, infrared light supply 3 arrives liquid crystal panel 1 the place ahead by the optics conducting subassembly with infrared.When liquid crystal panel 1 not being touched, the less of reflection takes place in infrared ray, has only the small part infrared ray to turn back to light activated element 4 places and received by light activated element 4.Under the lower situation of the infra-red intensity of light activated element 4 receptions, information handling system 5 is considered as not taking place touch operation.
When a kind of infrared touch panel is touched, staff, felt pen, perhaps other touch part, can produce reflection to infrared ray, so that the infra-red intensity that light activated element 4 receives strengthens relatively.Information handling system 5 is considered as having taken place touch operation, and according to the relative position that receives the light activated element 4 that infra-red intensity strengthens, judges the position of carrying out touch operation.
With reference to Fig. 4, the reflecting piece 27 of module 2 backlight is provided with light hole 6, and light hole 6 rears are provided with light activated element 4.By above-mentioned design light activated element 4 is set to the rear of reflector 27, arranging of light activated element 4 can not influence the reflecting effect of reflector 27, can effectively avoid because the light activated element 4 of having arranged causes the uneven phenomenon of liquid crystal panel 1 glazed thread.
With reference to Fig. 2, infrared light supply 3 can adopt infrarede emitting diode, and infrarede emitting diode is arranged on the module 2 backlight, and light emission direction is towards the place ahead of liquid crystal panel 1.Above structure, it is more even to help making Infrared to distribute, and then makes the definite more accurate of 5 pairs of positions that touch of information handling system.
The infrarede emitting diode parallel arranged of a light activated element 4 and a close together constitutes a reflection infrared sensor 6.Light activated element 4 is provided with the infrarede emitting diode of collocation with it, helps improving the sensitivity of a kind of infrared touch panel to the touch operation induction, and the precision of touch operation.
The distance that each reflection infrared sensor is 6 is greater than the distance of the light activated element in the reflection infrared sensor 64 with infrarede emitting diode.In order to avoid the light that the infrarede emitting diodes in reflection infrared sensor 6 send produces considerable influences to the light activated element 4 of other adjacent reflection infrared sensors 6.Help improving the precision of touch operation.
With reference to Fig. 4, a large amount of light activated elements 4 that use in the utility model can be integrated on the plate, and the cost of plate that is integrated with density and is not very high light activated element 4 is lower, and therefore cost of the present utility model is also lower.Adopting described reflection infrared sensor 6 structures of Fig. 2, is to have increased some infrarede emitting diodes on the basis of Fig. 4 structure, and cost slightly increases, but increases little.
Existing technology allows a large amount of light activated elements 4 are integrated on the plate more than 50 cun, therefore adopts the technology described in the utility model, can produce multi-point touch panel more than 50 cun with lower price.Infrared light supply and light activated element 4 are hidden in liquid crystal panel 1 back, are not vulnerable to external interference, and compact conformation.
As seen from the above technical solution, the utlity model has cost low, be applicable to large area display, stable performance, can be good at being applied to characteristics such as multiple point touching technology.
More than show and described ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the instructions just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (8)
1. infrared touch panel, comprise a liquid crystal panel, described liquid crystal panel rear is provided with module backlight, it is characterized in that: described module backlight is provided with infrared light supply, also is provided with the optics conducting subassembly that the infrared ray that described infrared light supply is sent conducts to liquid crystal panel the place ahead;
Be placed with on the described module backlight and be used to respond to ultrared light activated element, the light-sensitive surface of described light activated element is towards the place ahead of described liquid crystal panel;
Comprise that also one judges the information handling system of touch location, described information handling system connects described light activated element;
Described information handling system adopts the multiple point touching information handling system that can handle the multiple point touching operation, and described multiple point touching information handling system connects described light activated element.
2. a kind of infrared touch panel according to claim 1 is characterized in that: described information handling system is provided with one and adjusts the sensitivity adjustment module that receives described light activated element signal sensitivity.
3. a kind of infrared touch panel according to claim 2 is characterized in that: the reflecting piece of described module backlight is provided with light hole, and described light hole rear is provided with described light activated element.
4. a kind of infrared touch panel according to claim 2 is characterized in that: described infrared light supply adopts the infrared light supply of strip, and the infrared light supply of strip is positioned at, the visible light strip light source installation place of the light guide plate of module backlight.
5. according to claim 1,2 or 3 described a kind of infrared touch panels, it is characterized in that: described infrared light supply adopts infrarede emitting diode, and described infrarede emitting diode is arranged on the described module backlight, and light emission direction is towards the place ahead of described liquid crystal panel.
6. a kind of infrared touch panel according to claim 5 is characterized in that: the described infrarede emitting diode parallel arranged of a described light activated element and a close together constitutes a reflection infrared sensor.
7. a kind of infrared touch panel according to claim 6 is characterized in that: the distance between described reflection infrared sensor, and greater than the distance of light activated element in the described reflection infrared sensor and infrarede emitting diode.
8. a kind of infrared touch panel according to claim 7 is characterized in that: described light activated element is integrated on the plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202105248U CN201583924U (en) | 2009-09-30 | 2009-09-30 | Infrared touch screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202105248U CN201583924U (en) | 2009-09-30 | 2009-09-30 | Infrared touch screen |
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| Publication Number | Publication Date |
|---|---|
| CN201583924U true CN201583924U (en) | 2010-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202105248U Expired - Fee Related CN201583924U (en) | 2009-09-30 | 2009-09-30 | Infrared touch screen |
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| Country | Link |
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| CN (1) | CN201583924U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103354751A (en) * | 2011-02-18 | 2013-10-16 | 弗雷森纽斯医疗护理德国有限责任公司 | Medical device having a multi-function display |
| CN103392092A (en) * | 2011-03-18 | 2013-11-13 | 夏普株式会社 | Illumination device, display device, and television reception device |
| CN112002259A (en) * | 2020-09-02 | 2020-11-27 | 杭州瞳阳科技有限公司 | Infrared sensor mirror screen and preparation device thereof |
| CN112558817A (en) * | 2020-11-09 | 2021-03-26 | 吴建国 | Infrared three-dimensional scanning structure and application thereof in air touch screen and air key |
-
2009
- 2009-09-30 CN CN2009202105248U patent/CN201583924U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103354751A (en) * | 2011-02-18 | 2013-10-16 | 弗雷森纽斯医疗护理德国有限责任公司 | Medical device having a multi-function display |
| CN103392092A (en) * | 2011-03-18 | 2013-11-13 | 夏普株式会社 | Illumination device, display device, and television reception device |
| CN103392092B (en) * | 2011-03-18 | 2015-08-12 | 夏普株式会社 | Lighting device, display unit, radiovisor |
| CN112002259A (en) * | 2020-09-02 | 2020-11-27 | 杭州瞳阳科技有限公司 | Infrared sensor mirror screen and preparation device thereof |
| CN112558817A (en) * | 2020-11-09 | 2021-03-26 | 吴建国 | Infrared three-dimensional scanning structure and application thereof in air touch screen and air key |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shanghai Uiworks Electronic Tech. Co., Ltd. Assignor: Cheng Shuyi Contract record no.: 2011310000010 Denomination of utility model: Identification method of multi-touch of infrared touch screen Granted publication date: 20100915 License type: Exclusive License Record date: 20110221 |
|
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI UIWORKS ELECTRONIC TECH. CO., LTD. Free format text: FORMER OWNER: CHENG SHUYI Effective date: 20110624 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 200240 ROOM 601, NO. 136, LANE 1399, HUANING ROAD, MINHANG DISTRICT, SHANGHAI TO: 200433 ROOM 214-9, TOWER C, BUILDING 11, NO. 128, XIANGYIN ROAD, YANGPU DISTRICT, SHANGHAI |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20110624 Address after: 200433 room C, block 214-9, building 11, Xiang Yin Road, Shanghai, Yangpu District, 128 Patentee after: Shanghai Uiworks Electronic Tech. Co., Ltd. Address before: 200240 Shanghai city Minhang District Huaning road 1399 Lane No. 136 Room 601 Patentee before: Cheng Shuyi |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100915 Termination date: 20120930 |