CN102314264B - Optical touch screen - Google Patents
Optical touch screen Download PDFInfo
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- CN102314264B CN102314264B CN201010226442XA CN201010226442A CN102314264B CN 102314264 B CN102314264 B CN 102314264B CN 201010226442X A CN201010226442X A CN 201010226442XA CN 201010226442 A CN201010226442 A CN 201010226442A CN 102314264 B CN102314264 B CN 102314264B
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Abstract
The invention discloses an optical touch screen. When an object is in contact with an operation panel, a preset image which is projected by a projection light source and contains image information can form an object image with the image information on the surface of the object, while an image sensor can acquire a reflected image with the object image. Then, an angle is calculated according to the imaging position of the object in the reflected image and the position opposite to a preset shaft, and the linear distance from the image sensor to the object is calculated through comparing positions, sizes and/or phase positions of the image information in the preset image and the reflected image, thus, the position coordinate of the object on the operation panel can be located. Therefore, the optical touch screen provided by the invention has the advantages that a touch point of the optical touch screen can cover an entire touch panel and the optical touch screen has higher design flexibility. In addition, the optical touch screen provided by the invention has lower cost.
Description
Technical field
The invention relates to a kind of optical touch screen, espespecially a kind of optical touch screen that utilizes imageing sensor and special light emitting source to try to achieve the object position of touch.
Background technology
The principle of optical touch screen of the prior art is to utilize the blocking light signal to judge that the mode of touch point operates, it arranges a plurality of optical signal receivers and a plurality of optical signal transmitter around the contact panel, can be simultaneously or utilizing emitted light signal in turn and be arranged in the optical signal receiver of contact panel surrounding.When object blocking light signal, microcontroller can be done parsing to the signal that is received from a plurality of optical signal receivers, with the location touch point, then will be sent to corresponding to the signal of touch point via control circuit device and the processor of controlling contact panel, the last position that demonstrates again the object touching via contact panel, perhaps carry out the function corresponding to touch point.
Because prior art is to utilize the blocking optical signal path to reach the purpose of location touch point, therefore, the number of the touch point that can detect is that the number by the optical signal receiver of contact panel surrounding and optical signal transmitter is determined.So if touch point can be contained most of zone of contact panel, must be covered with optical signal transmitter and optical signal receiver in the contact panel surrounding, so can reduce the elasticity that designs on optical touch screen and need to reserve a lot of space mounting optical signal transmitters and optical signal receiver in the contact panel surrounding.In addition, prior art also utilizes optical signal transmitter to many optical signal receivers, or optical signal receiver can't use the shortcoming in space on contact panel to the principle of operation of many optical signal transmitters efficiently but have.
Summary of the invention
One embodiment of the invention provide a kind of optical touch screen.This optical touch screen comprises guidance panel, at least one projection light source, at least one imageing sensor, angle calculation unit, metrics calculation unit and object positioning unit.This guidance panel is in order to provide at least one object contact, and this guidance panel has predetermined shaft; This at least projection light source, in order to towards the projection of this guidance panel, to comprise at least one pre-fixing of at least one predetermined image, and in this subject surface, form at least one similar image; This at least one imageing sensor is in order to obtain at least one reflected image of the image that comprises this object, and wherein this at least one reflected image comprises this at least one similar image; This angle calculation unit is set up the online of imageing sensor in this at least one imageing sensor and this object according to the image space of the reflected image of this object in this at least one reflected image, in order to calculate this online and difference angle this predetermined shaft; This metrics calculation unit is position, size and/or the phase place of the similar image in the predetermined image in this at least one predetermined image and this at least one similar image relatively, in order to calculate imageing sensor in this at least one imageing sensor and the air line distance of this object; And this object positioning unit is located the position coordinates of this object at this guidance panel according to this difference angle and this air line distance.
An also embodiment of the present invention provides a kind of optical touch screen.This optical touch screen comprises guidance panel, at least one projection light source, at least one imageing sensor, angle calculation unit, metrics calculation unit and object positioning unit.This guidance panel is in order to provide at least one object contact; This at least one projection light source is in order to towards the projection of this guidance panel, to comprise the pre-fixing of image information, and in this subject surface, forms this image information; This at least one imageing sensor is in order to obtain at least one reflected image of the image that comprises this object, and wherein this at least one reflected image comprises this image information; This angle calculation unit is set up the online of this imageing sensor and this object according to the image space of this object in this reflected image, in order to calculate this online and this predetermined shaft difference angle; This metrics calculation unit is relatively launched the launch time of this pre-fixing that comprises this image information and is received mistiming between the time of reception of this reflected image comprise this image information, in order to calculate the air line distance of this imageing sensor and this object; And this object positioning unit, calculate the relative position of this object at this guidance panel according to this difference angle and this air line distance.
An also embodiment of the present invention provides a kind of optical touch screen.This optical touch screen comprises guidance panel, at least one imageing sensor, angle calculation unit, metrics calculation unit and object positioning unit.This guidance panel is in order to provide at least one object contact; This at least one imageing sensor is in order to obtain from least one reflected image of this subject surface reflection; This angle calculation unit is set up the online of this imageing sensor and this object according to the image space of this object in this reflected image, in order to calculate this online and this predetermined shaft difference angle; The air line distance of this metrics calculation unit the imaging size in this reflected image, image space, imaging similarity and/or this imageing sensor of brightness calculation and this object according to this object; And this object positioning unit calculates the relative position of this object at this guidance panel according to this difference angle and this air line distance.
An also embodiment of the present invention provides a kind of optical touch screen.This optical touch screen comprises guidance panel, at least one imageing sensor, ultrasonic transceiver, angle calculation unit, metrics calculation unit and object positioning unit.This guidance panel is in order to provide at least one object contact; This at least one imageing sensor is in order to obtain from the reflected image of this subject surface reflection; This ultrasonic transceiver is in order to towards this guidance panel, to throw the ultrasonic signal, and reception is by the reflection ultrasonic signal of this object reflection; This angle calculation unit is set up the online of this imageing sensor and this object according to the image space of this object in this reflected image, in order to calculate this online and this predetermined shaft difference angle; This metrics calculation unit, relatively launch the launch time of this ultrasonic signal and receive mistiming between the time of reception of this reflection ultrasonic signal in order to calculate the air line distance of this ultrasonic transceiver and this object; And this object positioning unit calculates the relative position of this object at this guidance panel according to this difference angle and this air line distance.
An also embodiment of the present invention provides a kind of optical touch screen.This optical touch screen comprises guidance panel, the first projection light source, the second projection light source, the first imageing sensor, the second imageing sensor, metrics calculation unit and object positioning unit.This guidance panel is that at least one object contact is provided; This first projection light source is in order to comprise the first pre-fixing of the first predetermined image towards this guidance panel projection, and on the surface of this object, forms the first similar image; This second projection light source is in order to comprise the second pre-fixing of the second predetermined image towards this guidance panel projection, and on the surface of this object, forms the second similar image; This first imageing sensor is the first reflected image that obtains this first similar image that comprises this object; This second imageing sensor is the second reflected image that obtains this second similar image that comprises this object; This metrics calculation unit is position, size and/or the phase place in this second similar image of this first similar image, this second reflected image of relatively this first reflected image and this first predetermined image, this second predetermined image, in order to calculate the air line distance of this object and this first imageing sensor, this second imageing sensor; And this object positioning unit is according to the air line distance of this object and this first imageing sensor, this second imageing sensor, calculates the relative position of this object at this guidance panel.
A kind of optical touch screen provided by the present invention calculates angle between online and predetermined shaft between object and this first imageing sensor by the first projection light source, the first imageing sensor and angle calculation unit; In addition, calculate air line distance between this second imageing sensor and this object by the second projection light source, the second imageing sensor and metrics calculation unit, or by ultrasonic transceiver and this metrics calculation unit, calculate air line distance between this object and this ultrasonic transceiver.So, the object positioning unit can be located the position coordinates of this object at guidance panel according to this angle obtained above and this air line distance.Therefore, this optical touch screen not only touch point can be contained the whole of contact panel, and this optical touch screen has advantages of that design flexibility is larger.
Description of drawings
Figure 1A is the schematic diagram of one embodiment of the invention explanation optical touch screen.
Figure 1B is the schematic diagram that an also embodiment of the present invention illustrates optical touch screen.
Fig. 2 is the position at explanation the first projection light source and the first imageing sensor place, and is relative with the position at the second projection light source and the second imageing sensor place.
Fig. 3 A and Fig. 3 B are the schematic diagram that explanation is incident upon the relevance of coded image on object and the distance between object and the second imageing sensor.
Fig. 4 A and Fig. 4 B are the schematic diagram that explanation is incident upon the relevance of speckle image on object and the distance between object and the second imageing sensor.
Fig. 5 A and Fig. 5 B are the description object positioning units according to angle and the air line distance anchored object schematic diagram at the position coordinates of guidance panel.
Fig. 6 is the schematic diagram that an also embodiment of the present invention illustrates optical touch screen.
Fig. 7 is the position at explanation the first projection light source and the first imageing sensor place, and is relative with the position at the second projection light source and the second imageing sensor place.
Fig. 8 is the schematic diagram that an also embodiment of the present invention illustrates optical touch screen.
Fig. 9 A and Fig. 9 B are the size of object image of explanation in the second reflected image and the schematic diagram of the relevance of the distance between object and the second imageing sensor.
Figure 10 is the position at explanation the first projection light source and the first imageing sensor place, and is relative with the position at the second projection light source and the second imageing sensor place.
Figure 11 is the schematic diagram that an also embodiment of the present invention illustrates optical touch screen.
Figure 12 is the corner of explanation projection light source and imageing sensor place guidance panel, and is relative with the corner of ultrasonic transceiver place guidance panel.
Figure 13 is the schematic diagram of one embodiment of the invention explanation optical touch screen.
Wherein, description of reference numerals is as follows:
100,600,800,1100,1300 optical touch screens
102,602,802,1102,1302 guidance panels
104,604,804,1,304 first projection light sources
106,606,806,1,306 second projection light sources
1104 projection light sources
1106 imageing sensors
1108 ultrasonic transceivers
108,608,808,1,308 first imageing sensors
109 imageing sensor groups
110,610,810,1,310 second imageing sensors
112,612,812,1110 angle calculation unit
114,614,814,1112,1312 metrics calculation unit
116,616,816,1114,1314 object positioning units
The X intersection point
L1 is online
θ 1 angle
D1, D2, D3, D4, D5, D6 air line distance
Embodiment
Please refer to Figure 1A, Figure 1A is the schematic diagram of one embodiment of the invention explanation optical touch screen 100.Optical touch screen 100 comprises guidance panel 102, the first projection light source 104, the second projection light source 106, the first imageing sensor 108, the second imageing sensor 110, angle calculation unit 112, metrics calculation unit 114 and object positioning unit 116.Guidance panel 102 is to be used to provide to allow object contact, it has the predetermined shaft of the upper limb of operation repetitive panel 102, and predetermined shaft is to define angle, but predetermined shaft of the present invention is not limited to the upper limb of operation repetitive panel 102, but predetermined shaft also lower edge, left border and the right border of operation repetitive panel 102.The first projection light source 104 is that the first projection light source 104 is preferably infrared light supply in order to towards guidance panel 102, to throw Infrared, but the present invention is not limited to infrared light supply, and other also can as visible light source, ultraviolet source.The first imageing sensor 108 is preferably the infrared light image sensor, in order to obtain the impact of other light source of Infrared and filtering (similarly being visible light) on optical touch screen 100; When wherein the first projection light source 104 was towards guidance panel 102 projection Infrared, the first imageing sensor 108 obtained the first reflected image that comprises object reflective infrared light.The second projection light source 106 is for launching the light source (for example laser light) of dull and narrow spectrum frequency range, in order to towards making panel 102, to throw the pre-fixing that comprises predetermined image (pattern), and in subject surface, form similar image, wherein predetermined image is to be speckle image (speckle pattern) or coded image (coded pattern).The second imageing sensor 110 is to obtain to comprise second reflected image of the second projection light source 106 at the formed similar image of subject surface.Angle calculation unit 112 is coupled to the first imageing sensor 108, set up the online L1 of the first imageing sensor 108 or the second imageing sensor 110 and object in order to the image space according to first reflected image of object in the first imageing sensor 108, and calculate the angle θ 1 between online L1 and predetermined shaft.Metrics calculation unit 114 is coupled to the second imageing sensor 110, in order to compare position, size and/or the phase place of the similar image in predetermined image and the second reflected image, to calculate the air line distance D1 between the second imageing sensor 110 and object.Object positioning unit 116 is coupled to metrics calculation unit 114 and angle calculation unit 112, in order to according to angle θ 1 and the air line distance D1 anchored object position coordinates at guidance panel 102.Wherein the first projection light source 104, the second projection light source 106, the first imageing sensor 108 and the second imageing sensor 110 are the same corners at guidance panel 102.
Please refer to Figure 1B, Figure 1B is the schematic diagram that an also embodiment of the present invention illustrates optical touch screen 200.The difference of optical touch screen 200 and optical touch screen 100 is that the first imageing sensor 108 and the second imageing sensor 110 are integrated into imageing sensor group 109, and imageing sensor group 109 is coupled to angle calculation unit 112 and metrics calculation unit 114.In addition, all the other principle of operation of optical touch screen 200 are all identical with optical touch screen 100, do not repeat them here.
In addition, the embodiment of Figure 1A is not limited to only have two projection light sources 104,106 and two imageing sensors 108,110.And the embodiment of Figure 1A also is not subject to the first projection light source 104, the second projection light source 106, the first imageing sensor 108 and the second imageing sensor 110 all in the same corner of guidance panel 102.Please refer to Fig. 2, Fig. 2 is the corner of explanation the first projection light source 104 and the first imageing sensor 108 place guidance panels 102, and is relative with the corner of the second projection light source 106 and the second imageing sensor 110 place guidance panels 102.
Please refer to Fig. 3 A, Fig. 3 B, Fig. 4 A and Fig. 4 B.Fig. 3 A and Fig. 3 B are the schematic diagram that explanation is incident upon the relevance of coded image on object and the distance between object and the second imageing sensor 110.As shown in Fig. 3 A and Fig. 3 B, the distance between object and the second imageing sensor 110 not simultaneously, be incident upon interval between the coded image on object also can difference or image space can change to some extent.Therefore, metrics calculation unit 114 can utilize the image processing algorithm to try to achieve the information of space phase, then according to the information of space phase, can calculate air line distance D1 between the second imageing sensor 110 and object.Fig. 4 A and Fig. 4 B are the schematic diagram that explanation is incident upon the relevance of speckle image on object and the distance between object and the second imageing sensor 110.As shown in Fig. 4 A and 4B, not simultaneously, being incident upon the speckle density of the speckle image on object or position can be different from distance between the second imageing sensor 110 and change along with object for the distance between object and the second imageing sensor 110.Therefore, metrics calculation unit 114 can utilize speckle image spatial statistics specificity analysis algorithm to try to achieve air line distance D1 between the second imageing sensor 110 and object.
Please refer to Fig. 5 A and Fig. 5 B, 5A figure and Fig. 5 B are description object positioning units 116 according to angle θ 1 and the air line distance D1 anchored object schematic diagram at the position coordinates of guidance panel 102.As shown in 5A figure and Fig. 5 B, take air line distance D1 as radius, the second imageing sensor 110 is drawn the part of a circle for the center of circle, and with predetermined shaft, determine the online L1 meeting of angle θ 1 and justify the X that intersects at a point, object positioning unit 116 can be according to online L1 and the position coordinates of the intersection point X anchored object of justifying at guidance panel 102.
Please refer to Fig. 6, Fig. 6 is the schematic diagram that an also embodiment of the present invention illustrates optical touch screen 600.Optical touch screen 600 comprises guidance panel 602, the first projection light source 604, the second projection light source 606, the first imageing sensor 608, the second imageing sensor 610, angle calculation unit 612, metrics calculation unit 614 and object positioning unit 616.Difference between the embodiment of Fig. 6 and the embodiment of Figure 1A be the metrics calculation unit 614 of the embodiment of Fig. 6 be the record emission pre-fixing that comprises image information launch time T0 with the time of reception T1 that receives the second reflected image that comprises image information between mistiming (T1-T0), then metrics calculation unit 614 utilizes the light velocity and mistiming (T1-T0) to calculate the air line distance D2 of the second imageing sensor 610 and object.In addition, all the other principle of operation of optical touch screen 600 are all identical with optical touch screen 100, do not repeat them here.
In addition, the embodiment of Fig. 6 is not limited to only have two projection light sources 604,606 and two imageing sensors 608,610; And the embodiment of Fig. 6 also is not subject to the first projection light source 604, the second projection light source 606, the first imageing sensor 608 and the second imageing sensor 610 all in the same corner of guidance panel 602.Please refer to Fig. 7, Fig. 7 is the corner of explanation the first projection light source 604 and the first imageing sensor 608 place guidance panels 602, and is relative with the corner of the second projection light source 606 and the second imageing sensor 610 place guidance panels 602.
Please refer to Fig. 8, Fig. 8 is the schematic diagram that an also embodiment of the present invention illustrates optical touch screen 800.Optical touch screen 800 comprises guidance panel 802, the first projection light source 804, the second projection light source 806, the first imageing sensor 808, the second imageing sensor 810, angle calculation unit 812, metrics calculation unit 814 and object positioning unit 816.Difference between the embodiment of Fig. 8 and the embodiment of Figure 1A is the second projection light source 806 of embodiment of Fig. 8 and the first projection light source 804 is all infrared light supply and the second imageing sensor 810 is the infrared light image sensor.Wherein the second imageing sensor 810 is to obtain the second reflected image that comprises the object image information; And metrics calculation unit 814 is coupled to the second imageing sensor 810, to utilize the brightness of the size of object image in the second reflected image and/or the object image in the second reflected image or the position can be along with object and the characteristic of change different with distance between the second imageing sensor 810, to calculate the air line distance D3 between the second imageing sensor 810 and object.Please refer to Fig. 9 A and Fig. 9 B, Fig. 9 A and Fig. 9 B are the size of object image of explanation in the second reflected image and the schematic diagram of the relevance of the distance between object and the second imageing sensor 810.As shown in Fig. 9 A and Fig. 9 B, the size of the object image in the second reflected image can be different from distance between the second imageing sensor 810 and change along with object.In addition, when the distance between object and the second imageing sensor 810 was closer, the brightness of the object image in the second reflected image was brighter; When the distance between object and the second imageing sensor 810 was distant, the brightness of the object image in the second reflected image was darker.Therefore, can go out air line distance D3 between the second imageing sensor 810 and object by above-mentioned property calculation.Except above-mentioned difference, all the other principle of operation of optical touch screen 800 are all identical with optical touch screen 100, do not repeat them here.
In addition, the embodiment of Fig. 8 is not limited to only have two projection light sources 804,806 and two imageing sensors 808,810; And the embodiment of Fig. 8 also is not subject to the first projection light source 804, the second projection light source 806, the first imageing sensor 808 and the second imageing sensor 810 all in the same corner of guidance panel 802.Please refer to Figure 10, Figure 10 is the corner of explanation the first projection light source 804 and the first imageing sensor 808 place guidance panels 802, and is relative with the corner of the second projection light source 806 and the second imageing sensor 810 place guidance panels 802.
Please refer to Figure 11, Figure 11 is the schematic diagram that an also embodiment of the present invention illustrates optical touch screen 1100.Optical touch screen 1100 comprises guidance panel 1102, projection light source 1104, imageing sensor 1106, ultrasonic transceiver 1108, angle calculation unit 1110, metrics calculation unit 1112 and object positioning unit 1114.In the embodiment of Figure 11, ultrasonic transceiver 1108 is towards guidance panel 1102 projection ultrasonic signals, and reception is by the reflection ultrasonic signal of object reflection; And metrics calculation unit 1112 be coupled to ultrasonic transceiver 1108 record emission ultrasonic signals launch time U0 with the time of reception U1 that receives reflection ultrasonic signal between mistiming (U1-U0), then metrics calculation unit 1112 utilizes ultrasonic speed and mistiming (U1-U0) to calculate the air line distance D4 of ultrasonic transceiver 1108 and object.In addition, all the other principle of operation of optical touch screen 1100 are all identical with optical touch screen 100, do not repeat them here.In addition, the embodiment of Figure 11 is not limited to only have a projection light source 804, an imageing sensor 1106 and a ultrasonic transceiver 1108.
Yet the embodiment of Figure 11 also is not subject to projection light source 1104, imageing sensor 1106 and the ultrasonic transceiver 1108 same corner at guidance panel 802.Please refer to Figure 12, Figure 12 is the corner of explanation projection light source 1104 and imageing sensor 1106 place guidance panels 1102, and is relative with the corner of ultrasonic transceiver 1108 place guidance panels 1102.
Please refer to Figure 13, Figure 13 is the schematic diagram of one embodiment of the invention explanation optical touch screen 1300.Optical touch screen 1300 comprises guidance panel 1302, the first projection light source 1304, the second projection light source 1306, the first imageing sensor 1308, the second imageing sensor 1310, metrics calculation unit 1312 and object positioning unit 1314.difference between the embodiment of Figure 13 and the embodiment of Figure 1A is that the first projection light source 1304 and the second projection light source 1306 of the embodiment of Figure 13 are for launching the light source (for example laser light) of dull and narrow spectrum frequency range, in order to towards doing panel 1302 projections, to comprise the first pre-fixing of the first predetermined image (pattern) and the second pre-fixing of the second predetermined image, and in subject surface, form the first similar image and the second similar image, wherein first predetermined image the second predetermined image is to be speckle image (speckle pattern) or coded image (coded pattern).The first imageing sensor 1308 is to obtain to comprise first reflected image of the first projection light source 1304 at formed the first similar image of subject surface.The second imageing sensor 1310 is to obtain to comprise second reflected image of the second projection light source 1306 at formed the second similar image of subject surface.Metrics calculation unit 1312 is to be coupled to the first imageing sensor 1308 and the second imageing sensor 1310, position, size and/or phase place in the first similar image of comparison the first reflected image, the second similar image of the second reflected image and the first predetermined image, the second predetermined image, then air line distance D5, the D6 of calculating object and the first imageing sensor 1308, the second imageing sensor 1310.Object positioning unit 1314 is to be coupled to metrics calculation unit 1312, in order to according to air line distance D5, the D6 anchored object position coordinates at guidance panel 1302.In addition, all the other principle of operation of optical touch screen 1300 are all identical with optical touch screen 100, do not repeat them here.Wherein the corner of the first projection light source 1304 and the first imageing sensor 1308 place guidance panels 1302, adjacent with the corner of the second projection light source 1306 and the second imageing sensor 1310 place guidance panels 1302.
In sum, optical touch screen provided by the present invention calculates angle between online and predetermined shaft between object and the first imageing sensor by the first projection light source, the first imageing sensor and angle calculation unit.In addition, optical touch screen provided by the present invention calculates air line distance between the second imageing sensor and object by the second projection light source, the second imageing sensor and metrics calculation unit, or by ultrasonic transceiver and metrics calculation unit, calculates air line distance between object and ultrasonic transceiver.In addition, optical touch screen provided by the present invention also can by the first projection light source, the first imageing sensor and the second projection light source, the second imageing sensor and metrics calculation unit calculate object and the first imageing sensor, the second imageing sensor and between air line distance.So, the object positioning unit can be according to angle obtained above and air line distance, or object and the first imageing sensor, the second imageing sensor and between the air line distance anchored object at the position coordinates of guidance panel.Therefore, optical touch screen provided by the present invention not only touch point can be contained the whole of contact panel, and this optical touch screen has advantages of larger design flexibility.In addition, the cost of optical touch screen provided by the present invention also significantly reduces than prior art.
The foregoing is only the preferred embodiments of the present invention, all equalizations of doing according to the claims in the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (18)
1. optical touch screen comprises:
Guidance panel, in order to object contact at least to be provided, this guidance panel has predetermined shaft;
This optical touch screen also is characterised in that and comprises:
At least one projection light source, in order to towards this guidance panel projection, to comprise at least one pre-fixing of at least one predetermined image, and form at least one similar image in this subject surface;
At least one imageing sensor, in order to obtain at least one reflected image of the image that comprises this object, wherein this at least one reflected image comprises this at least one similar image;
Angle calculation unit, set up the online of imageing sensor in this at least one imageing sensor and this object according to the image space of the reflected image of this object in this at least one reflected image, in order to calculate this online and difference angle this predetermined shaft;
Metrics calculation unit, relatively position, size and/or the phase place of the similar image in the predetermined image in this at least one predetermined image and this at least one similar image, in order to calculate imageing sensor in this at least one imageing sensor and the air line distance of this object; And
The object positioning unit, locate the position coordinates of this object at this guidance panel according to this difference angle and this air line distance.
2. optical touch screen as claimed in claim 1, is characterized in that, this predetermined image is to be speckle image or coded image.
3. optical touch screen as claimed in claim 1, it is characterized in that, comprise the first imageing sensor and the second imageing sensor, wherein this first imageing sensor is to obtain the first reflected image, calculate this difference angle in order to coordinate this angle calculation unit, and this second imageing sensor is to obtain the second reflected image, in order to coordinate this metrics calculation unit, calculates this air line distance.
4. optical touch screen as claimed in claim 3, it is characterized in that, this first imageing sensor is to be the infrared light image sensor, in order to obtain Infrared, and the projection light source in this at least one projection light source is infrared light supply, in order to throw Infrared towards this guidance panel, this first imageing sensor can be obtained this first reflected image of the image that comprises this object.
5. optical touch screen as claimed in claim 3, it is characterized in that, projection light source in this at least one projection light source is to launch dullness and short wavelength's light, and this second imageing sensor namely is used for obtaining comprising this projection light source this second reflected image at the formed similar image of this subject surface.
6. optical touch screen comprises:
Guidance panel, in order to provide at least one object contact;
This optical touch screen also is characterised in that and comprises:
At least one projection light source, in order to towards this guidance panel projection, to comprise the pre-fixing of image information, and form this image information in this subject surface;
At least one imageing sensor, in order to obtain at least one reflected image of the image that comprises this object, wherein this at least one reflected image comprises this image information;
Angle calculation unit, set up the online of this imageing sensor and this object according to the image space of this object in this reflected image, in order to calculate this online and this predetermined shaft difference angle;
Metrics calculation unit, relatively emission comprises launch time of this pre-fixing of this image information and the mistiming between the time of reception of this reflected image that reception comprises this image information, in order to calculate the air line distance of this imageing sensor and this object; And
The object positioning unit, calculate the relative position of this object at this guidance panel according to this difference angle and this air line distance.
7. optical touch screen as claimed in claim 6, it is characterized in that, comprise the first imageing sensor and the second imageing sensor, wherein this first imageing sensor is to obtain the first reflected image, calculate this difference angle in order to coordinate this angle calculation unit, and this second imageing sensor is to obtain the second reflected image, in order to coordinate this metrics calculation unit, calculates this air line distance.
8. optical touch screen as claimed in claim 7, it is characterized in that, this first imageing sensor is in order to obtain Infrared for the infrared light image sensor, and further provide infrared light supply in order to throw Infrared towards this guidance panel, this first imageing sensor can be obtained this first reflected image that comprises this object image-forming information.
9. optical touch screen as claimed in claim 7, it is characterized in that, this projection light source is to launch dullness and short wavelength's light, and this second imageing sensor namely is used for obtaining comprising that this projection light source forms this second reflected image that comprises this image information in this subject surface.
10. optical touch screen comprises:
Guidance panel, in order to provide at least one object contact;
This optical touch screen also is characterised in that and comprises:
At least one imageing sensor, in order to obtain from least one reflected image of this subject surface reflection;
Angle calculation unit, set up the online of this imageing sensor and this object according to the image space of this object in this reflected image, in order to calculate this online and predetermined shaft difference angle;
Metrics calculation unit, the air line distance of the imaging size according to this object in this reflected image and/or this imageing sensor of brightness calculation and this object; And
The object positioning unit, calculate the relative position of this object at this guidance panel according to this difference angle and this air line distance.
11. optical touch screen as claimed in claim 10, it is characterized in that, comprise the first imageing sensor and the second imageing sensor, wherein this first imageing sensor is to obtain the first reflected image, calculate this difference angle in order to coordinate this angle calculation unit, and this second imageing sensor is to obtain the second reflected image, in order to coordinate this metrics calculation unit, calculates this air line distance.
12. optical touch screen as claimed in claim 11, it is characterized in that, this first imageing sensor is in order to obtain Infrared for the infrared light image sensor, and further provide infrared light supply in order to throw Infrared towards this guidance panel, this first imageing sensor can be obtained this first reflected image that comprises this object image-forming information.
13. optical touch screen as claimed in claim 11, it is characterized in that, this second imageing sensor is in order to obtain Infrared for the infrared light image sensor, and further provide infrared light supply in order to throw Infrared towards this guidance panel, this second imageing sensor can be obtained this second reflected image that comprises this object image-forming information.
14. an optical touch screen comprises:
Guidance panel, in order to provide at least one object contact;
This optical touch screen also is characterised in that and comprises:
At least one imageing sensor, in order to obtain from the reflected image of this subject surface reflection;
The ultrasonic transceiver, in order to towards this guidance panel, to throw the ultrasonic signal, and receive the reflection ultrasonic signal that is reflected by this object;
Angle calculation unit, set up the online of this imageing sensor and this object according to the image space of this object in this reflected image, in order to calculate this online and predetermined shaft difference angle;
Metrics calculation unit, relatively launch the launch time of this ultrasonic signal and receive mistiming between the time of reception of this reflection ultrasonic signal in order to calculate the air line distance of this ultrasonic transceiver and this object; And
The object positioning unit, calculate the relative position of this object at this guidance panel according to this difference angle and this air line distance.
15. optical touch screen as claimed in claim 14, it is characterized in that, this imageing sensor is in order to obtain Infrared for the infrared light image sensor, and further provide infrared light supply in order to throw Infrared towards this guidance panel, this imageing sensor can be obtained this reflected image that comprises this object image-forming information.
16. an optical touch screen comprises:
Guidance panel, in order to provide at least one object contact;
This optical touch screen also is characterised in that and comprises:
The first projection light source, in order to comprise the first pre-fixing of the first predetermined image towards this guidance panel projection, and form the first similar image on the surface of this object;
The second projection light source, in order to comprise the second pre-fixing of the second predetermined image towards this guidance panel projection, and form the second similar image on the surface of this object;
The first imageing sensor, in order to obtain the first reflected image of this first similar image that comprises this object;
The second imageing sensor, in order to obtain the second reflected image of this second similar image that comprises this object;
Metrics calculation unit, position, size and/or the phase place in this second similar image of this first similar image of this first reflected image, this second reflected image and this first predetermined image, this second predetermined image relatively, in order to calculate the air line distance of this object and this first imageing sensor, this second imageing sensor; And
The object positioning unit,, according to the air line distance of this object and this first imageing sensor, this second imageing sensor, calculate the relative position of this object at this guidance panel.
17. optical touch screen as claimed in claim 16, is characterized in that, this first predetermined image, this second predetermined image are to be speckle image or coded image.
18. optical touch screen as claimed in claim 16, is characterized in that, this first projection light source, this second projection light source are to launch dullness and short wavelength's light.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010226442XA CN102314264B (en) | 2010-07-08 | 2010-07-08 | Optical touch screen |
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| CN201010226442XA CN102314264B (en) | 2010-07-08 | 2010-07-08 | Optical touch screen |
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| CN102314264A CN102314264A (en) | 2012-01-11 |
| CN102314264B true CN102314264B (en) | 2013-11-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102486704A (en) * | 2010-12-06 | 2012-06-06 | 扬升照明股份有限公司 | Touch module and touch display device |
| CN103209030B (en) * | 2012-01-12 | 2015-05-13 | 宏碁股份有限公司 | Electronic device and data transmission method thereof |
| DE102012206851A1 (en) * | 2012-04-25 | 2013-10-31 | Robert Bosch Gmbh | Method and device for determining a gesture executed in the light cone of a projected image |
| CN103871374B (en) * | 2012-12-11 | 2016-04-13 | 比亚迪股份有限公司 | Liquid crystal control panel |
| TWI498792B (en) * | 2013-08-06 | 2015-09-01 | Wistron Corp | Optical touch system and touch and display system |
| CN104375714B (en) * | 2013-08-16 | 2017-11-07 | 联想(北京)有限公司 | A kind of electronic equipment and a kind of method of identification operation |
| TWI533190B (en) * | 2014-09-23 | 2016-05-11 | 緯創資通股份有限公司 | Touch sensing apparatus, touch system and touch sensing method |
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| US6362468B1 (en) * | 1999-06-10 | 2002-03-26 | Saeilo Japan, Inc. | Optical unit for detecting object and coordinate input apparatus using same |
| JP2004110313A (en) * | 2002-09-17 | 2004-04-08 | Ricoh Co Ltd | Coordinate input device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101015883B1 (en) * | 2008-10-17 | 2011-02-23 | 삼성모바일디스플레이주식회사 | Touch screen display apparatus and method for driving the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6362468B1 (en) * | 1999-06-10 | 2002-03-26 | Saeilo Japan, Inc. | Optical unit for detecting object and coordinate input apparatus using same |
| JP2004110313A (en) * | 2002-09-17 | 2004-04-08 | Ricoh Co Ltd | Coordinate input device |
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