CN203812215U - Infrared touch screen - Google Patents
Infrared touch screen Download PDFInfo
- Publication number
- CN203812215U CN203812215U CN201420189543.8U CN201420189543U CN203812215U CN 203812215 U CN203812215 U CN 203812215U CN 201420189543 U CN201420189543 U CN 201420189543U CN 203812215 U CN203812215 U CN 203812215U
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- Prior art keywords
- light source
- membrane
- optical element
- transparency carrier
- light
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Abstract
The utility model discloses an infrared touch screen. The infrared touch screen comprises a transparent substrate, a light source and a light sensing device, and further comprises a membrane-shaped optical element located between the transparent substrate and the light source. The membrane-shaped optical element is used for refracting part of light sent by the light source and enabling the refracted light to enter the transparent substrate, the incident light in the transparent substrate is transmitted in the transparent substrate in a total-reflecting mode. The membrane-shaped optical element is a permeability increasing membrane formed by overlapping a plurality of layers of materials with the refractive index increased or reduced in sequence. The membrane-shaped optical element is a prism membrane, and the corners of the prism membrane face the light source. According to the scheme, the membrane-shaped optical element is adopted, the installation technology is simple, the structure is simple, mounting and dismounting are convenient, and installation and maintenance are also convenient.
Description
Technical field
The utility model relates to touch-screen field, relates in particular to a kind of infrared touch panel of frustrated total reflection mode.
Background technology
Now there is on the market a kind of touch-screen of frustrated total reflection mode, the infrared light sending from light source emitter (infrared transmitting tube) (comprises glass at transparency carrier, PMMA material or PC material etc.) internal transmission, infrared light is upper transparency carrier, lower surface is launched entirely, in the time having the object of touch to touch transparency carrier, original total reflection is destroyed, form diffuse reflection, the part light transparency carrier of escaping out, the light intensity that corresponding infrared photosensitive device (infrared receiving tube) is received weakens, determine the touch location of touch objects with this, this mode can be made into pure plane touch screen, shortcoming is for allowing the reflection that light can practical function in the inner formation of transparency carrier, light need to enter transparency carrier with special angle, need a light guide structure part to change the original direction of light and in transparency carrier, carry out total internal reflection with special angle, need equally a light guide structure part to make light in transparency carrier penetrate and be caught by photosensitive device, prior art as shown in Figure 1, light is after light source 2 transmittings on circuit board 15, enter in transparency carrier 4 through prism 14 reflections, and carry out the propagation of total reflection mode in upper and lower surface 1 and 6 in transparency carrier, finally received by photosensitive device 3, by sending in signal processor 10 and process after the processing circuit processes on circuit board 16, with the touch location of identification finger 7.Above-mentioned circuit board of the prior art be fixed on display screen under, be unfavorable for install and maintenance, and thickness can not get improve.
Utility model content
Technical problem to be solved in the utility model is to provide the infrared touch panel of the frustrated total reflection mode of a kind of relatively easy installation and maintenance, and thinner thickness can be provided.
For solving the problems of the technologies described above, the utility model provides a kind of infrared touch panel, comprise transparency carrier, light source and photosensitive device, also comprise membranaceous optical element, between transparency carrier and light source, for inciding described transparency carrier after the part anaclasis that described light source is sent, described in the light that incides in transparency carrier in described transparency carrier, transmit in total reflection mode.
Described membranaceous optical element is anti-reflection film.
Described anti-reflection film is increased successively by multilayer refractive index or the material stack that reduces forms.
Described membranaceous optical element is prism film.
Described prism film corner angle are facing to described light source.
Have such scheme known, the utility model adopts membranaceous optical element, and mounting process is simple, and structure is simplified, and easy accessibility is easy for installation and maintenance.
Brief description of the drawings
Fig. 1 is the infrared touch panel schematic diagram of frustrated total reflection mode in prior art;
Fig. 2 is the utility model the first embodiment infrared touching screen structure schematic diagram;
Fig. 3 is the structural representation of anti-reflection film;
Fig. 4 is the first embodiment index path;
Fig. 5 is another embodiment schematic diagram of the utility model.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the technical solution of the utility model is clearly and completely described.
As shown in Figure 2, the infrared touch panel of the utility model frustrated total reflection mode comprises transparency carrier 4, light source 2 and photosensitive device 3; Also comprise anti-reflection film 8, described anti-reflection film 8 is between transparency carrier 4 and light source 2, equally, between photosensitive device 3 and transparency carrier 4, also can be provided with above-mentioned anti-reflection film 8, the side that also photosensitive device directly can be put into transparency carrier receives, anti-reflection film 8 has high index of refraction, and the part light that light source 2 can be sent reflects, and makes the light being refracted enter the rear acquisition total reflection of transparency carrier 4 effect.
Anti-reflection film 8 can be the multilayer refraction film that the stack of multilayer different refractivity material forms, as shown in Figure 3, anti-reflection film 8 comprises three layers of different refractivity material 35,36,37, in trilaminate material, the refractive index of material 37 is greater than the refractive index of material 36, the refractive index of material 36 is greater than the refractive index of material 35, and larger refraction angle finally can be provided.As shown in Figure 4, light source 2 (infrared transmitting tube) sends infrared light to index path, and infrared light enters in transparency carrier 4 after multilayer refraction materials (anti-reflection film) 8, and the mode with total reflection is transmitted in transparency carrier 4.
Together with the Material cladding that Fig. 3 is three layers of different refractivity with anti-reflection film in Fig. 4, form, it will be understood by those skilled in the art that it can is also the different refractivity material of other quantity number of plies.Can set according to the actual needs.
Fig. 5 illustrates another embodiment of the utility model, adopts existing prism film as refracting element, and the corner angle face 201 of described prism film is towards described light source.The infrared light that infrared transmitting tube sends, after prism film BEF (Brightness Enhancement Film) 200 refractions, transmits in total reflection mode to enter in transparency carrier 4.Prism film BEF is also referred to as prismatic lens.
The utility model adopts membranaceous optical element, and mounting process is simple, and structure is simplified, and easy accessibility is easy for installation and maintenance.
Obviously, those skilled in the art can carry out various changes and modification and not depart from spirit and scope of the present utility model the utility model.Like this, if these amendments of the present utility model and within modification belongs to the scope of the utility model claim and equivalent technology thereof, the utility model is also intended to comprise these changes and modification interior.
Claims (5)
1. an infrared touch panel, comprise transparency carrier, light source and photosensitive device, it is characterized in that, also comprise membranaceous optical element, between transparency carrier and light source, for inciding described transparency carrier after the part anaclasis that described light source is sent, described in the light that incides in transparency carrier in described transparency carrier, transmit in total reflection mode.
2. a kind of infrared touch panel according to claim 1, is characterized in that, described membranaceous optical element is anti-reflection film.
3. a kind of infrared touch panel according to claim 2, is characterized in that, described anti-reflection film is increased successively by multilayer refractive index or the material stack that reduces forms.
4. a kind of infrared touch panel according to claim 1, is characterized in that, described membranaceous optical element is prism film.
5. a kind of infrared touch panel according to claim 4, is characterized in that, described prism film corner angle are facing to described light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420189543.8U CN203812215U (en) | 2014-04-18 | 2014-04-18 | Infrared touch screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420189543.8U CN203812215U (en) | 2014-04-18 | 2014-04-18 | Infrared touch screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203812215U true CN203812215U (en) | 2014-09-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420189543.8U Expired - Fee Related CN203812215U (en) | 2014-04-18 | 2014-04-18 | Infrared touch screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203812215U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104407745A (en) * | 2014-11-12 | 2015-03-11 | 江苏特思达电子科技股份有限公司 | Touch panel and display device |
| CN104461177A (en) * | 2014-11-12 | 2015-03-25 | 江苏特思达电子科技股份有限公司 | Touch panel and display device |
| CN105204101A (en) * | 2015-10-27 | 2015-12-30 | 张家港康得新光电材料有限公司 | Brightness enhancement film, backlight module and display |
| CN105279486A (en) * | 2015-10-12 | 2016-01-27 | 格科微电子（上海）有限公司 | Optical fingerprint identification method |
| CN105808021A (en) * | 2016-03-09 | 2016-07-27 | 京东方科技集团股份有限公司 | Light-sensing touch panel, display apparatus and touch positioning method |
| CN105867703A (en) * | 2016-06-15 | 2016-08-17 | 湖州佳格电子科技股份有限公司 | Touch device based on frustrated total internal reflection |
| CN114025034A (en) * | 2021-10-29 | 2022-02-08 | 武汉华星光电半导体显示技术有限公司 | Display module |
-
2014
- 2014-04-18 CN CN201420189543.8U patent/CN203812215U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104407745A (en) * | 2014-11-12 | 2015-03-11 | 江苏特思达电子科技股份有限公司 | Touch panel and display device |
| CN104461177A (en) * | 2014-11-12 | 2015-03-25 | 江苏特思达电子科技股份有限公司 | Touch panel and display device |
| CN104407745B (en) * | 2014-11-12 | 2018-02-09 | 江苏特思达电子科技股份有限公司 | A kind of contact panel and display device |
| CN104461177B (en) * | 2014-11-12 | 2018-10-19 | 江苏特思达电子科技股份有限公司 | A kind of touch panel and display device |
| CN105279486A (en) * | 2015-10-12 | 2016-01-27 | 格科微电子（上海）有限公司 | Optical fingerprint identification method |
| CN105204101A (en) * | 2015-10-27 | 2015-12-30 | 张家港康得新光电材料有限公司 | Brightness enhancement film, backlight module and display |
| CN105808021A (en) * | 2016-03-09 | 2016-07-27 | 京东方科技集团股份有限公司 | Light-sensing touch panel, display apparatus and touch positioning method |
| CN105867703A (en) * | 2016-06-15 | 2016-08-17 | 湖州佳格电子科技股份有限公司 | Touch device based on frustrated total internal reflection |
| CN105867703B (en) * | 2016-06-15 | 2018-11-09 | 湖州佳格电子科技股份有限公司 | A kind of frustrated total internal reflection touching device |
| CN114025034A (en) * | 2021-10-29 | 2022-02-08 | 武汉华星光电半导体显示技术有限公司 | Display module |
| CN114025034B (en) * | 2021-10-29 | 2023-11-28 | 武汉华星光电半导体显示技术有限公司 | display module |
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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: 20140903 Termination date: 20160418 |
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| CF01 | Termination of patent right due to non-payment of annual fee |