CN202049464U - High-stability optical touch screen - Google Patents
High-stability optical touch screen Download PDFInfo
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- CN202049464U CN202049464U CN201120085159XU CN201120085159U CN202049464U CN 202049464 U CN202049464 U CN 202049464U CN 201120085159X U CN201120085159X U CN 201120085159XU CN 201120085159 U CN201120085159 U CN 201120085159U CN 202049464 U CN202049464 U CN 202049464U
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- reflective membrane
- frame
- touch screen
- camera
- optical touch
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- 230000003287 optical effect Effects 0.000 title claims abstract description 34
- 239000012528 membrane Substances 0.000 claims abstract description 72
- 230000011514 reflex Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 description 6
- 230000003334 potential effect Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model discloses an optical touch screen of high stability, including the touch-sensitive screen body, set up in camera, neighbouring each on one side two angles of touch-sensitive screen body frame the light emitting component of camera and set up in the reflective membrane on the other trilateral of touch-sensitive screen body frame, wherein, with the reflective membrane of the frame that the camera was located is relative is strong reflective membrane, with the reflective membrane of the frame adjacent both sides at camera place is weak reflective membrane. The utility model discloses make the frame of arbitrary department reflect back the energy of camera lens on the touch-sensitive screen body frame and all differ a little for whole equilibrium, thereby improved optical touch screen's stability.
Description
Technical field
The utility model relates to the touch system field, relates in particular to a kind of optical touch screen of high stability.
Background technology
We know that the optical principle that existing optical touch screen generally utilizes is as follows: be installed in the CCD/CMOS camera in the upper left corner, top, launch light by the LED lamp, through reflection bar reflection all around, enter in the CCD/CMOS camera in the upper left corner.In like manner, the light of the LED in upper right corner emission imports in the CCD camera on right side.The light that gathers forms a reticule in the touch area, through the space between the light that repeatedly reflects in 1MM.When touch is a bit, left side LED is transmitted into the light of this point and light that reflectance coating reflects back all is blocked, LED simultaneously is transmitted into the light of changing the time and also is blocked, the straight line that constitutes between the CCD/CMOS camera at two ends and this two light and two cameras can be formed two angles again like this, this accurate coordinate controlled device typing like this realizes touching reaction.Single-point, multiple point touching have been realized.
The optical touch frame is support, adds reflectorized material with advanced person's optical technology, can accomplish that the 15--250 inch does not wait, but in the reality, in a frame, long limit and minor face are arranged, because distance is far away more, LED sends energy and feedbacks energy to reflectorized material and get over the most weak, signal is weak more, and it is minimum that waveform is compared other place.This is the influence of distance, influences the influence of bigger angle to the reflex reflection ability of reflective membrane, and the angle that incides reflectance coating along with light increases, and the reflex reflection ability can sharply descend.
For example, as shown in Figure 1, LC is left side camera and LED position, and RC is the right camera and LED position.In the screen of 16:9, can calculate the light that LC launches, be 0 degree at the incident angle of C point reflective membrane, be about 60 degree at base D point reflective membrane incident angle, be 30 to spend at side D point reflective membrane incident angle, be about 0 at B point reflective membrane incident angle and spend.Because spending at incident ray 30, the reflective membrane material can both well reflect back with interior, very fast a little less than falling above 30 degree reflection potentiales.It is strong so just to have formed the side signal, and the situation that the base signal is weak causes the unbalanced of overall signal.Thereby the problem that causes is: when the side signal met the demands, the base can't reach requirement; Mention emitted energy,, the side overflow occurs when the base signal has satisfied when requiring.In like manner, the right RC is consistent in the situation of 3 of A, C, D with the left side.
The utility model content
The purpose of this utility model provides a kind of optical touch screen of high stability, adopts the reflective membrane Mixed Design, makes overall signal reach balanced requirement, reaches the effect that improves optical touch screen stability.
For achieving the above object, the utility model embodiment provides the optical touch screen of high stability, comprise touch screen body, be arranged at the light-emitting component of the camera on two jiaos on one side of described touch screen body frame, contiguous each described camera and be arranged at reflective membrane on other three limits of described touch screen body frame, wherein, the reflective membrane of a frame relative with the frame at described camera place is strong reflective membrane, and the reflective membrane of two frames adjacent with the frame at described camera place is weak reflective membrane.
Preferably, described strong reflective membrane is stronger 0.3 ~ 10 times than the reflex reflection ability of weak reflective membrane.
Preferably, described light-emitting component places the place ahead or the both sides of each described camera.
Preferably, described light-emitting component is infrarede emitting diode or infrared radium-shine laser.
A kind of optical touch screen of high stability, comprise touch screen body, be arranged at the light-emitting component of the camera on two jiaos on one side of described touch screen body frame, contiguous each described camera and be arranged at reflective membrane on other three limits of described touch screen body frame, wherein, the reflective membrane of two frames adjacent with the frame at described camera place is weak reflective membrane; A frame light-emitting component incident angle relative with the frame at described camera place is strong reflective membrane at the reflective membrane of 30 ° ~ 60 ° of sections, and the reflective membrane of all the other sections is weak reflective membrane.
Preferably, described strong reflective membrane is stronger 0.3 ~ 10 times than the reflex reflection ability of weak reflective membrane.
Preferably, described light-emitting component places the place ahead or the both sides of each described camera.
Preferably, described light-emitting component is infrarede emitting diode or infrared radium-shine laser.
Compared with prior art, the optical touch screen of the utility model high stability utilizes reflective membrane Mixed Design method, on the more weak frame of reflection potential, strong reflective membrane is set, on the stronger frame of reflection potential, weak reflective membrane is set, wherein strong reflective membrane is stronger 0.3 times to 10 times than the converse energy of weak reflective membrane force rate, make that like this energy of the frame reflected back camera lens at arbitrary place all is more or less the same on the touch screen body frame, make whole balanced, thereby improved the stability of optical touch screen.
Description of drawings
Fig. 1 is the principle assumption diagram of optical touch screen of the prior art.
Fig. 2 is the structural representation of optical touch screen of the high stability of the utility model embodiment one.
Fig. 3 is the structural representation of optical touch screen of the high stability of the utility model embodiment two.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, the utility model is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 2, the utility model embodiment one provides a kind of optical touch screen of high stability, comprise touch screen body 10, described touch screen body 10 comprises four frames and the display screen that is fenced up by four frames, these four frames comprise first frame 11, second frame 12, the 3rd frame 13 and the 4th frame 14, wherein, first frame 11 is relative with the 3rd frame 13, second frame 12 is relative with the 4th frame 14, second frame 12, the 4th frame 14 are adjacent with first frame 11 respectively.Be respectively arranged with camera 20 on two jiaos of described first frame 11, the place ahead of each described camera 20 or both sides are equipped with light-emitting component 30, and described light-emitting component 30 is infrarede emitting diode or infrared radium-shine laser.Described second frame 12, the 3rd frame 13 and the 4th frame 14 are equipped with reflective membrane, wherein, the reflective membrane that is provided with on the 3rd frame 13 relative with described first frame 11 is strong reflective membrane, and the reflective membrane that second frame 12 adjacent with described first frame 11 and the 4th frame 14 are provided with is weak reflective membrane.Wherein, described strong reflective membrane is stronger 0.3 ~ 10 times than the reflex reflection ability of weak reflective membrane.
In the present embodiment, if under all the same situation of the reflective membrane material of each frame, because the reflective membrane material can both well reflect back with interior at incident ray 30 degree, very fast a little less than surpassing 30 degree reflection potentiales and falling, it is strong to have formed the side signal, the situation that the base signal is weak causes the unbalanced of overall signal.Therefore on the more weak frame of script reflection potential (second frame 12 and the 4th frame 14), strong reflective membrane is set, on the stronger frame of script reflection potential (the 3rd frame 13), weak reflective membrane is set, wherein strong reflective membrane is stronger 0.3 times to 10 times than the converse energy of weak reflective membrane force rate, make that like this energy of the frame reflected back camera lens at arbitrary place all is more or less the same on the touch screen body frame, make integral body balanced, thereby improved the stability of optical touch screen.
The optical touch screen of present embodiment is horizontal screen design, be appreciated that ground, when optical touch screen designs for perpendicular screen, because the reflective membrane material can both well reflect back with interior at incident ray 30 degree, very fast a little less than surpassing 30 degree reflection potentiales and falling, it is strong to have formed the base signal, and the situation that the side signal is weak causes the unbalanced of overall signal.Therefore need adopt weak reflective membrane on the base, adopt strong reflective membrane, reach the effect that improves optical touch screen stability equally at side.
Please refer to Fig. 3, be the structural representation of the optical touch screen of the high stability of the utility model embodiment two.Identical with first embodiment is, the optical touch screen of the high stability of present embodiment comprises touch screen body 40, described touch screen body 40 comprises four frames and the display screen that is fenced up by four frames, these four frames comprise first frame 41, second frame 42, the 3rd frame 43 and the 4th frame 44, wherein, first frame 41 is relative with the 3rd frame 43, second frame 42 is relative with the 4th frame 44, and second frame 42, the 4th frame 44 are adjacent with first frame 41 respectively.Be respectively arranged with camera 50 on two jiaos of described first frame 41, the place ahead of each described camera 50 or both sides are equipped with light-emitting component 60, and described light-emitting component 60 is infrarede emitting diode or infrared radium-shine laser.Described second frame 42, the 3rd frame 43 and the 4th frame 44 are equipped with reflective membrane.Different with first embodiment is, the reflective membrane that second frame 12 adjacent with described first frame 11 of present embodiment and the 4th frame 14 are provided with is weak reflective membrane, and light-emitting component 60 incident angles on the 3rd frame 13 relative with described first frame 11 are strong reflective membrane at the reflective membrane of 30 ° ~ 60 ° sections (as the E1 section among the figure), and the reflective membrane of all the other sections (as E2 among the figure and E3 section) is weak reflective membrane.Present embodiment also can make the energy that is gone back by the frame emission be more or less the same, and makes integral body balanced, thereby improves the stability of optical touch screen.
The above is a preferred implementation of the present utility model; certainly can not limit the interest field of the utility model with this; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvement and change, these improvement and change also are considered as protection domain of the present utility model.
Claims (8)
1. the optical touch screen of a high stability, comprise touch screen body, be arranged at the light-emitting component of the camera on two jiaos on one side of described touch screen body frame, contiguous each described camera and be arranged at reflective membrane on other three limits of described touch screen body frame, it is characterized in that: the reflective membrane of a frame relative with the frame at described camera place is strong reflective membrane, and the reflective membrane of two frames adjacent with the frame at described camera place is weak reflective membrane.
2. the optical touch screen of high stability according to claim 1, it is characterized in that: described strong reflective membrane is stronger 0.3 ~ 10 times than the reflex reflection ability of weak reflective membrane.
3. the optical touch screen of high stability according to claim 1, it is characterized in that: described light-emitting component places the place ahead or the both sides of each described camera.
4. the optical touch screen of high stability according to claim 1, it is characterized in that: described light-emitting component is infrarede emitting diode or infrared radium-shine laser.
5. the optical touch screen of a high stability, comprise touch screen body, be arranged at the light-emitting component of the camera on two jiaos on one side of described touch screen body frame, contiguous each described camera and be arranged at reflective membrane on other three limits of described touch screen body frame, it is characterized in that: the reflective membrane of two frames adjacent with the frame at described camera place is weak reflective membrane; Light-emitting component incident angle on the frame relative with the frame at described camera place is strong reflective membrane at the reflective membrane of 30 ° ~ 60 ° of sections, and the reflective membrane of all the other sections is weak reflective membrane.
6. the optical touch screen of high stability according to claim 5, it is characterized in that: described strong reflective membrane is stronger 0.3 ~ 10 times than the reflex reflection ability of weak reflective membrane.
7. the optical touch screen of high stability according to claim 5, it is characterized in that: described light-emitting component places the place ahead or the both sides of each described camera.
8. the optical touch screen of high stability according to claim 5, it is characterized in that: described light-emitting component is infrarede emitting diode or infrared radium-shine laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120085159XU CN202049464U (en) | 2011-03-28 | 2011-03-28 | High-stability optical touch screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120085159XU CN202049464U (en) | 2011-03-28 | 2011-03-28 | High-stability optical touch screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202049464U true CN202049464U (en) | 2011-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120085159XU Expired - Lifetime CN202049464U (en) | 2011-03-28 | 2011-03-28 | High-stability optical touch screen |
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| CN (1) | CN202049464U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103458576A (en) * | 2013-08-22 | 2013-12-18 | 广州视睿电子科技有限公司 | Light emitting component drive circuit and optical touch screen |
-
2011
- 2011-03-28 CN CN201120085159XU patent/CN202049464U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103458576A (en) * | 2013-08-22 | 2013-12-18 | 广州视睿电子科技有限公司 | Light emitting component drive circuit and optical touch screen |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111123 |
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| CX01 | Expiry of patent term |