CN201465076U - Light source for touch screen and touch screen - Google Patents
Light source for touch screen and touch screen Download PDFInfo
- Publication number
- CN201465076U CN201465076U CN2009201097066U CN200920109706U CN201465076U CN 201465076 U CN201465076 U CN 201465076U CN 2009201097066 U CN2009201097066 U CN 2009201097066U CN 200920109706 U CN200920109706 U CN 200920109706U CN 201465076 U CN201465076 U CN 201465076U
- Authority
- CN
- China
- Prior art keywords
- touch
- screen
- light source
- photodetector
- frame
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0045—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide
- G02B6/0046—Tapered light guide, e.g. wedge-shaped light guide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0075—Arrangements of multiple light guides
- G02B6/0078—Side-by-side arrangements, e.g. for large area displays
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Position Input By Displaying (AREA)
Abstract
The utility model discloses a light source for a touch screen and a touch screen, wherein the light source, wherein the light source is mounted on one or a plurality of sides of the frame of the touch screen, and comprises a wedge-shaped light guiding board and a luminous body, wherein the front surface of the wedge-shaped light guiding board is distributed with a great amount of projections, and the front surface of the wedge-shaped light guiding board faces to the touch detection zone of the touch screen. The touch screen is a touch screen which utilizes the mentioned light source. The light source mainly has the advantages that the lighting degree of the light source, which is radiated to the touch detection zone is even through the wedge-shaped light guiding board.
Description
Technical field
The utility model relates to the touch screen technology field, relates in particular to a kind of light source and a kind of touch-screen that is used for touch-screen.
Background technology
Touch-screen is a kind of novel man-machine interaction input mode, compares with the mouse input mode with traditional keyboard, and the touch-screen input is more directly perceived.Cooperate identification software, touch-screen can also be realized handwriting input.Touch-screen is made up of detection part that is installed in the indicator screen front and touch screen controller.When finger or other object touch when being installed in the touch-screen of display front end, the position that is touched is detected by touch screen controller, and delivers to main frame by interface (as RS-232 serial port, USB etc.).Optical touch screen is a kind of in numerous touch-screens, in optical touch screen, light source is a wherein very important ingredient, and traditional light source uses a plurality of LED (Light Emitting Diode, light emitting diode) direct illumination, there is following shortcoming in this scheme:
Owing to adopt LED direct illumination, the position uneven illumination that causes being illuminated is spared.
The utility model content
The utility model provides a kind of light source and a kind of touch-screen that is used for touch-screen, so that provide uniform illumination for touch-screen.
The utility model provides a kind of light source that is used for touch-screen, light source is installed on one or more limit of touch-screen frame, described light source is made up of wedge shape light guide plate and luminophor, is distributed with the touch surveyed area of the front surface of a large amount of projectioies and wedge shape light guide plate towards touch-screen on the front surface of described wedge shape light guide plate.
Further, the described and front surface facing surfaces wedge shape light guide plate is provided with reflecting element.
Further, light diffusion sheet is housed before the front surface of described wedge shape light guide plate.
Further, described luminophor is light emitting diode pointolite or column light source.
Further, described luminophor is the infraluminescence body.
Further, on the limit of the described frame that light source is housed two or more described light sources are housed.
Further, described light source also comprises a reflex housing, be placed on described luminophor around, be used for the light of described luminophor concentrated projecting described wedge shape light guide plate.
Further, described light source is installed on two limits or three limits of touch-screen frame.
The utility model provides a kind of touch-screen simultaneously, this touch-screen includes the light source described in frame, the technique scheme, at least two photodetectors and a treatment circuit, wherein photodetector and light source are not positioned on same the limit of touch-screen frame, are used to detect light intensity; Treatment circuit links to each other with at least one photodetector, is used for calculating according to the detected light intensity of coupled photodetector the position and the output of touch objects.
Further, the frame of described touch-screen is a rectangle, and described photodetector is two and is installed in two adjacent angles of touch-screen frame.
Further, described photodetector is infrared camera or photodiode.
The utility model also provides another touch-screen, this touch-screen includes the light source described in frame, the technique scheme, a photodetector, a reflecting element and a treatment circuit, wherein photodetector and light source are not positioned on same the limit of touch-screen frame, are used to detect light intensity; Treatment circuit links to each other with photodetector, is used for calculating according to the detected light intensity of coupled photodetector the position and the output of touch objects.
Further, the frame of described touch-screen is a rectangle, and described photodetector is installed on the angle of touch-screen frame, and described reflecting element is installed on the opposite side on any limit of forming the angle that photodetector is housed.
Further, the frame of described touch-screen is a rectangle, and described photodetector is installed on the limit of touch-screen frame, and described reflecting element is installed on the opposite side on the limit that photodetector is housed.
Further, described photodetector is infrared camera or photodiode.
Further, described photodetector is two or more.
Further, described reflecting element is two or more.
The utility model constitutes light source by luminophor and a wedge shape light guide plate, and this wedge shape light guide plate makes light that luminophor the sends touch area that touches of directive equably after the wedge shape light guide plate, to realize the purpose of this utility model.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in the utility model embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is a kind of structural representation that is used for the light source of touch-screen shown in the utility model embodiment one;
Fig. 2 is a kind of wedge shape light guide plate and the luminophor combination synoptic diagram that is used for the light source of touch-screen among the utility model embodiment one;
Fig. 3 is used for the front surface synoptic diagram of wedge shape light guide plate of the light source of touch-screen for a kind of among the utility model embodiment one;
Fig. 4 is a kind of structural representation that is used for the light source of touch-screen shown in the utility model embodiment two;
Fig. 5 is the structural representation of a kind of touch-screen shown in the utility model embodiment three;
Fig. 6 is the structural representation of the another kind of touch-screen shown in the utility model embodiment four.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme in the utility model is clearly and completely described, obviously, described embodiment only is a part of embodiment of the present utility model, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
The utility model provides a kind of light source that is used for touch-screen, as Fig. 1, Fig. 2, shown in Figure 3, this light source 106 is installed on the limit 104 of touch-screen frame 103, light source 106 is made up of wedge shape light guide plate 100 and luminophor 101, the front surface 102 that is distributed with a large amount of projection 201 and wedge shape light guide plate 100 on the front surface 102 of described wedge shape light guide plate 100 towards the touch surveyed area 105. of touch-screen in the present embodiment, touch-screen is a rectangle, in actual applications, touch-screen also can be other shape. and luminophor 101 is the infraluminescence source of column, luminophor 101 also can be the luminophor of other type in actual applications, is a LED pointolite or light emitting diode as luminophor 101; Wedge shape light guide plate 100 is made by polymethylmethacrylate (being commonly referred to organic glass) usually, its D optical index is 1.482, can adopt the mold injects moulding. wedge shape light guide plate 100 also can be other material and makes in actual applications, makes etc. for the plastics of common printing opacity as wedge shape light guide plate 100; In order better to provide uniform illumination for touch-screen, also can add a slice light diffusion sheet in front surface 102 fronts of wedge shape light guide plate 100. simultaneously in order to reduce scattering and disappearing of light as few as possible, also can be provided with reflecting element in front surface 102 facing surfaces with wedge shape light guide plate 100, this reflecting element can be simple reflective membrane etc. be distributed with a large amount of projection 201 on the front surface 102 of wedge shape light guide plate 100, this is for scattering creates conditions, and makes the light of outgoing reach irreflexive effect. it is uniform that generalized case lower convexity 201 distributes on the front surface 102 of wedge shape light guide plate 100.
Be further to reduce scattering and disappearing of light, also can around luminophor 101, a reflex housing be installed, be used for the light of described luminophor 100 concentrated projecting described wedge shape light guide plate 100.In the embodiment shown in fig. 1,106 of light sources are installed on the limit 104 of touch-screen frame 103, also can light source 106 be installed on the limit more than two of touch-screen frame 103 in actual applications, as on two limits of touch-screen frame 103 or three limits, light source 106 being installed according to needs to intensity of illumination.
Fig. 4 is used for the light-source structure synoptic diagram of touch-screen for another kind provided by the utility model, this embodiment and a kind of unique difference that is used for the light source of touch-screen shown in Figure 1 are to be equipped with on the limit 104 of touch-screen frame 103 of light source 106 two light sources 106, like this can be for touch-screen provide more sufficient illumination, this structure is applicable to large-sized touch-screen.Certainly we can install plural light source 106 as required on the limit of the touch-screen frame 103 that light source 106 is housed.
Fig. 5 is a kind of touch screen structure synoptic diagram provided by the utility model, a kind of touch-screen shown in Figure 5 includes frame 103, light source 106, two photodetectors 501 and treatment circuit (not shown)s, wherein photodetector 501 is not positioned on same the limit of touch-screen frame with light source 106, is used to detect light intensity; Treatment circuit links to each other with at least one photodetector 501, is used for calculating according to the detected light intensity of coupled photodetector the position and the output of touch objects.Here to calculate the location method of touch objects generally be the utilization triangulation to treatment circuit, also other method.No matter be the utilization triangulation, or other method, all be prior art, just repeated at this.Two photodetectors 501 among Fig. 5 are infrared camera, are installed on the limit, opposite of light source 106.In actual applications, photodetector 501 also can be the photodetector of other type, is light emitting diode etc. as photodetector 501; Photodetector 501 also can be installed on the touch-screen frame on two adjacent angles; In order to realize multiple spot or obtain better accuracy of detection that photodetector 501 also can be more than two.The concrete condition of light source 106 has not just repeated at this as described in the literal of front.In the present embodiment, touch-screen is a rectangle, and in actual applications, touch-screen also can be other shape.
Fig. 6 is the structural representation of another kind of touch-screen provided by the utility model, a kind of touch-screen shown in Figure 6 includes frame 103, light source 106, photodetector 501, a reflecting element 601 and a treatment circuit (not shown), wherein photodetector 501 is not positioned on same the limit of touch-screen frame with light source 106, is used to detect light intensity; Treatment circuit links to each other with photodetector 501, be used for calculating the position and the output of touch objects according to coupled photodetector 501 detected light intensities. here to calculate the location method of touch objects be the position in the surveyed area 105 of touching of calculating touch objects according to the situation of the picture of the detected touch objects of photodetector own and touch objects in the virtual image situation that reflecting element 601 is become to treatment circuit, the method has been prior art, just having repeated at this. the photodetector 501 among Fig. 6 is infrared camera, be installed on the angle of touch-screen frame, reflecting element 601 is installed on the opposite side on any limit of forming the angle that photodetector is housed. in actual applications, photodetector 501 also can be the photodetector of other type, is light emitting diode etc. as photodetector 501; In order to realize multiple spot or to obtain better accuracy of detection, photodetector also can be more than two. and the concrete condition of light source 106 is as described in the literal of front, just not repeated at this. reflecting element 601 can be level crossing commonly used, also can be the reflecting element 601 of other type, be very smooth metal surface, surface as reflecting element 601. that is to say as long as touch objects can become the reflecting element 601 of the virtual image all right therein; In order to realize multiple spot or to obtain better accuracy of detection, reflecting element also can use more than two. in actual applications, we also can be installed in photodetector 501 on the limit of frame of touch-screen of a rectangle, reflecting element 601 is installed on the opposite side on the limit that photodetector 501 is housed, so also can realize scheme described in the utility model. simultaneously in order to save cost, also can use reflecting element to replace photodetector, as long as that is to say a photodetector, can use a plurality of reflecting elements. we also can use a plurality of photodetectors to improve accuracy of detection and realize multiple spot simultaneously. in the present embodiment, touch-screen is a rectangle, in actual applications, touch-screen also can be other shape.
Through the above description of the embodiments, those skilled in the art can be well understood to the utility model and can realize by hardware, also can realize by the mode that software adds necessary general hardware platform.
In a word, the above is preferred embodiment of the present utility model only, is not to be used to limit protection domain of the present utility model.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (17)
1. light source that is used for touch-screen, described light source is installed on one or more limit of touch-screen frame, it is characterized in that, described light source is made up of wedge shape light guide plate and luminophor, is distributed with the touch surveyed area of the front surface of a large amount of projectioies and wedge shape light guide plate towards touch-screen on the front surface of described wedge shape light guide plate.
2. a kind of light source that is used for touch-screen as claimed in claim 1 is characterized in that, the described and front surface facing surfaces wedge shape light guide plate is provided with reflecting element.
3. a kind of light source that is used for touch-screen as claimed in claim 2 is characterized in that, light diffusion sheet is housed before the front surface of described wedge shape light guide plate.
4. as any described a kind of light source that is used for touch-screen in the claim 1 to 3, it is characterized in that described luminophor is light emitting diode pointolite or column light source.
5. a kind of light source that is used for touch-screen as claimed in claim 4 is characterized in that described luminophor is the infraluminescence body.
6. a kind of light source that is used for touch-screen as claimed in claim 5 is characterized in that, on the limit of the described frame that light source is housed two or more described light sources is housed.
7. a kind of light source that is used for touch-screen described in claim 6 is characterized in that, described light source also comprises a reflex housing, be placed on described luminophor around, be used for the light of described luminophor concentrated projecting described wedge shape light guide plate.
8. a kind of light source that is used for touch-screen as claimed in claim 5 is characterized in that, described light source is installed on two limits or three limits of touch-screen frame.
9. touch-screen, include frame, it is characterized in that, described touch-screen also includes any one described light source in the claim 1 to 8, at least two photodetectors and a treatment circuit, wherein photodetector and light source are not positioned on same the limit of touch-screen frame, are used to detect light intensity; Treatment circuit links to each other with at least one photodetector, is used for calculating according to the detected light intensity of coupled photodetector the position and the output of touch objects.
10. a kind of touch-screen as claimed in claim 9 is characterized in that, the frame of described touch-screen is a rectangle, and described photodetector is two and is installed on two adjacent angles of touch-screen frame.
11., it is characterized in that described photodetector is infrared camera or photodiode as claim 9 or 10 described a kind of touch-screens.
12. touch-screen, include frame, it is characterized in that, described touch-screen also includes any one described light source in the claim 1 to 8, a photodetector, a reflecting element and a treatment circuit, wherein photodetector and light source are not positioned on same the limit of touch-screen frame, are used to detect light intensity; Treatment circuit links to each other with photodetector, is used for calculating according to the detected light intensity of coupled photodetector the position and the output of touch objects.
13. a kind of touch-screen as claimed in claim 12, it is characterized in that, the frame of described touch-screen is a rectangle, and described photodetector is installed on the angle of touch-screen frame, and described reflecting element is installed on the opposite side on any limit of forming the angle that photodetector is housed.
14. a kind of touch-screen as claimed in claim 12 is characterized in that, the frame of described touch-screen is a rectangle, and described photodetector is installed on the limit of touch-screen frame, and described reflecting element is installed on the opposite side on the limit that photodetector is housed.
15., it is characterized in that described photodetector is infrared camera or photodiode as claim 12 or 13 or 14 described a kind of touch-screens.
16. touch-screen as claimed in claim 15 is characterized in that, described photodetector is two or more.
17. touch-screen as claimed in claim 16 is characterized in that, described reflecting element is two or more.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201097066U CN201465076U (en) | 2009-07-03 | 2009-07-03 | Light source for touch screen and touch screen |
| PCT/CN2010/074918 WO2011000327A1 (en) | 2009-07-03 | 2010-07-02 | Light source for touch screen and touch screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201097066U CN201465076U (en) | 2009-07-03 | 2009-07-03 | Light source for touch screen and touch screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201465076U true CN201465076U (en) | 2010-05-12 |
Family
ID=42392424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201097066U Expired - Fee Related CN201465076U (en) | 2009-07-03 | 2009-07-03 | Light source for touch screen and touch screen |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN201465076U (en) |
| WO (1) | WO2011000327A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101984394A (en) * | 2010-10-29 | 2011-03-09 | 苏州超联光电有限公司 | Capacitance screen |
| WO2011144013A1 (en) * | 2010-05-19 | 2011-11-24 | 北京汇冠新技术股份有限公司 | Light sources, mounting method thereof, touch screen, touch system and display |
| CN102314262A (en) * | 2010-06-30 | 2012-01-11 | 联想(北京)有限公司 | Lighting effect equipment and electronic equipment |
| US9121586B2 (en) | 2010-06-30 | 2015-09-01 | Beijing Lenovo Software Ltd. | Lighting effect device and electric device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW244383B (en) * | 1993-10-22 | 1995-04-01 | Ibm | Touch-screen input device using the monitor as a light source operating at an intermediate frequency |
| CN2496052Y (en) * | 2001-04-13 | 2002-06-19 | 宋义 | Improved, uniform and high efficiency side lighting type back light source |
| CN100392495C (en) * | 2001-07-27 | 2008-06-04 | 株式会社恩普乐 | Surface light source device and light guide plate |
| KR101035253B1 (en) * | 2003-02-14 | 2011-05-19 | 넥스트 홀딩즈 리미티드 | Touch screen signal processing |
-
2009
- 2009-07-03 CN CN2009201097066U patent/CN201465076U/en not_active Expired - Fee Related
-
2010
- 2010-07-02 WO PCT/CN2010/074918 patent/WO2011000327A1/en active Application Filing
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011144013A1 (en) * | 2010-05-19 | 2011-11-24 | 北京汇冠新技术股份有限公司 | Light sources, mounting method thereof, touch screen, touch system and display |
| CN102314262A (en) * | 2010-06-30 | 2012-01-11 | 联想(北京)有限公司 | Lighting effect equipment and electronic equipment |
| CN102314262B (en) * | 2010-06-30 | 2014-03-12 | 联想(北京)有限公司 | Lighting effect equipment and electronic equipment |
| US9121586B2 (en) | 2010-06-30 | 2015-09-01 | Beijing Lenovo Software Ltd. | Lighting effect device and electric device |
| CN101984394A (en) * | 2010-10-29 | 2011-03-09 | 苏州超联光电有限公司 | Capacitance screen |
| CN101984394B (en) * | 2010-10-29 | 2012-11-28 | 苏州超联光电有限公司 | Capacitance screen |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011000327A1 (en) | 2011-01-06 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Addressee: Beijing UNITOP New Technology Co., Ltd. Document name: Notification to Pay the Fees |
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| 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: 20100512 Termination date: 20180703 |
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