CN102129330A - Touch control screen, touch control module and control method - Google Patents
Touch control screen, touch control module and control method Download PDFInfo
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- CN102129330A CN102129330A CN2011100516971A CN201110051697A CN102129330A CN 102129330 A CN102129330 A CN 102129330A CN 2011100516971 A CN2011100516971 A CN 2011100516971A CN 201110051697 A CN201110051697 A CN 201110051697A CN 102129330 A CN102129330 A CN 102129330A
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Abstract
A touch control screen comprises a display, at least two touch control units and a control unit. The display has a display surface. The touch control units are configured beside the display surface. Each touch control unit comprises a light source and an image sensor. The light source is configured beside the display surface and suitable to emit a beam by facing a sensing space before the display surface. The image sensor is configured beside the display surface and the sensing surface of the image sensor faces the sensing space. The image sensor is suitable to capture a light spot in the sensing space and generate an image signal. The control unit is electrically connected with the light sources and the image sensors and suitable to receive the image signals from the image sensors, as well as judges the position of the light spot relative to the display surface according to the image signals. A touch control module and a control method are also disclosed.
Description
The application divides an application for application number 200910150400.X's.
Technical field
The invention relates to the control method of a kind of touch-control module, Touch Screen and touch-control module, and particularly relevant for the control method of a kind of optical touch control module, Touch Screen and this touch-control module.
Background technology
Along with the progress of photoelectricity science and technology, the mode that adopts mouse to control the object in job platform and the screen can't satisfy user's demand, therefore, also just is developed gradually for the interface of hommization than mouse control.In the interface of these hommizations, approach most experience in the human general daily life in the mode of finger touch, therefore older or child perhaps can't operate mouse, but can adopt finger to come touch-control easily, this point can adopt Touch Screen to obtain the confirmation of part from some Automatic Teller Machines.
The mode that multiple realization touch-controlling interface is arranged in the known technology.For example, some known LCD attaches one deck touch control film on panel, reach condenser type or electric resistance touch-control.Perhaps, also there is known technology that small touch control component is done in display panels.Yet, make in display panels, all can influence the light transmittance of LCD attaching one deck touch control film or touch control component that will be small on the panel, cause the optical quality decline of LCD.
Other has known technology to adopt the mode of optics sensing to judge finger or the pointer position with respect to screen, but these known technologies all adopt the mode of catching dim spot (promptly finger or pointer are blocked the formed dim spot of light) to judge the position of finger.Yet, can distinguish for dim spot can be known, and reduce the probability of erroneous judgement, must provide good and uniform light source, so that the relative backlight of dim spot is comparatively obvious.The producing method of these backlights can attach reflecting strips or light-emitting section at the edge of the display surface of screen, but this can increase the complexity and the cost of mechanism simultaneously.Moreover, adopt the method for catching dim spot also to be subjected to the influence of surround lighting easily.Particularly, when surround lighting shines on finger or touch object, and when being reflexed to image sensor by it, will cause can't interpretation to the situation of dim spot.
Summary of the invention
The object of the present invention is to provide a kind of Touch Screen, touch-control module and control method.
Provided by the invention kind of touch-control module, its structure is comparatively simple.
Control method provided by the invention, it is applicable to a touch-control module, and has lower False Rate.
Touch Screen provided by the invention, it has lower touch-control False Rate.
For achieving the above object, one embodiment of the invention propose a kind of touch-control module, and it is applicable to a display, so that display has touch controllable function.Display has a display surface, and touch-control module comprises one first image sensor, one second image sensor and a control module.First image sensor is disposed on the other primary importance of display surface.Second image sensor is disposed on the other second place of display surface.Control module is electrically connected to light source, first image sensor and second image sensor.During a sensing space before at least one touch object enters display surface, first image sensor and second image sensor can sense touch object institute beam reflected, and control module is suitable for sensing the touch object beam reflected according to first image sensor and second image sensor and judges the position of touch object with respect to display surface.
In one embodiment of this invention, touch-control module also comprises at least one light source, is disposed at by the display surface, and is suitable for sending the light beam that enters sensing space.
In one embodiment of this invention, above-mentioned light source comprises one first light source and a secondary light source, and it is disposed at display surface other one the 3rd position and one the 4th position respectively.Control module is suitable for Sustainable Control first light source and secondary light source in a plurality of continuous unit interval.The per unit time can comprise one first subunit time and one second subunit time.In time, control module is suitable for making first light source to be in opening, and makes secondary light source be in closed condition at first subunit.In time, control module is suitable for making first light source to be in closed condition, and makes secondary light source be in opening at second subunit.
In one embodiment of this invention, in the time, control module is suitable for making first image sensor to be in opening at first subunit, and makes second image sensor be in closed condition.In time, control module is suitable for making first image sensor to be in closed condition at second subunit, and is suitable for making second image sensor to be in opening.
In one embodiment of this invention, the per unit time also comprised for one the 3rd subunit time, and in the time, control module is suitable for making first light source and secondary light source all to be in closed condition at the 3rd subunit.Control module be suitable for first image sensor first subunit of per unit time in the time measured image brilliance deduct first image sensor at the 3rd subunit of the unit interval of correspondence measured image brilliance in the time, to obtain one first touch-control image.Control module be suitable for second image sensor second subunit of per unit time in the time measured image brilliance deduct second image sensor at the 3rd subunit of the unit interval of correspondence measured image brilliance in the time, to obtain one second touch-control image.Control module is judged the position of touch object with respect to display surface according to the first touch-control image and the second touch-control image.
In one embodiment of this invention, the 3rd position and the 4th position are dropped on respectively by the two adjacent corners of display surface.Primary importance be with by the identical corner of display surface can be dropped in the 3rd position, and the second place is with by the identical corner of display surface can be dropped in the 4th position.
In one embodiment of this invention, touch-control module also comprises one the 3rd image sensor and one the 4th image sensor, it is disposed at display surface other one the 5th position and one the 6th position respectively, and the sensing face of the 3rd image sensor and the 4th image sensor is towards sensing space.Light source can also comprise one the 3rd light source and one the 4th light source, and it is disposed at display surface other one the 7th position and a 8 positions respectively.The per unit time also comprises one the 4th subunit time and one the 5th subunit time.In time, control module is suitable for making the 3rd light source and the 4th light source to be in closed condition at first subunit.In time, control module is suitable for making the 3rd light source and the 4th light source to be in closed condition at second subunit.In time, control module is suitable for making the 3rd light source to be in opening at the 4th subunit, and makes first, second and the 4th light source be in closed condition.In time, control module is suitable for making the 4th light source to be in opening at the 5th subunit, and makes first, second and third light source be in closed condition.
In one embodiment of this invention, the quantity of touch object for example is two, when these touch objects these unit interval be positioned at sensing space simultaneously in one of them at least the time, in this unit interval, at least one reflective spot can be each had in the touch-control image that the first, second, third and the 4th image sensor is sensed, and two reflective spots can be each had in the touch-control image that at least wherein the two sensed of the first, second, third and the 4th image sensor.Control module is suitable for comparing the position of these reflective spots in these touch-control images, with reject these touch objects the position of non-existent relative display surface, and determine the position of the relative display surface of these touch objects.
In one embodiment of this invention, first image sensor and second image sensor all are maintained at opening in the All Time of per unit in the time.
In one embodiment of this invention, the primary importance and the second place drop on respectively by the two adjacent corners of display surface.
In one embodiment of this invention, touch-control module also comprises at least one extinction bar or at least one refractive power bar, and it is disposed on one side at least of display surface, and wherein the refractive power bar is suitable for light beam toward the direction reflection away from display surface.
Another embodiment of the present invention proposes a kind of touch-control module, and it is applicable to a display, so that display has touch controllable function.Display has a display surface, and touch-control module comprises one first image sensor, one second image sensor, one first light source, a secondary light source and a control module.First image sensor is disposed on the other primary importance of display surface.Second image sensor is disposed on the other second place of display surface.First light source is disposed on one the 3rd other position of display surface, and is suitable for sending the light that enters sensing space.Secondary light source is disposed on one the 4th other position of display surface, and is suitable for sending the light that enters sensing space.Control module is electrically connected to first light source, secondary light source, first image sensor and second image sensor.Control module is suitable for Sustainable Control first light source and secondary light source in a plurality of continuous unit interval, and the per unit time comprises one first subunit time and one second subunit time.In time, control module is suitable for making first light source to be in opening, and makes secondary light source be in closed condition at first subunit.In time, control module is suitable for making first light source to be in closed condition, and makes secondary light source be in opening at second subunit.When at least one touch object enters sensing space, first image sensor and second image sensor can sense the image of touch object, and control module is suitable for judging the position of touch object with respect to display surface according to the image that first image sensor and second image sensor are sensed.
Another embodiment of the present invention proposes a kind of control method, and it is suitable for controlling a touch-control module.Touch-control module is applicable to a display, and display has a display surface.Touch-control module comprises one first image sensor and one second image sensor.First image sensor and second image sensor are disposed at display surface other a primary importance and a second place respectively.This control method comprises the following steps.At first, during a sensing space before at least one touch object enters display surface, make first image sensor and second image sensor sense touch object institute beam reflected.Then, sense the touch object beam reflected according to first image sensor and second image sensor and judge the position of touch object with respect to display surface.
In one embodiment of this invention, touch-control module comprises one first light source and a secondary light source, and it is disposed at display surface other one the 3rd position and one the 4th position respectively.This control method is suitable for Sustainable Control first light source and secondary light source in a plurality of continuous unit interval, and wherein the per unit time comprises one first subunit time and one second subunit time.Control method also comprises the following steps: at first subunit to make first light source be in opening, and make secondary light source be in closed condition in the time., make first light source be in closed condition, and make secondary light source be in opening in the time at second subunit.
In one embodiment of this invention, control method is suitable for Sustainable Control first image sensor and second image sensor in these continuous unit interval, wherein control method also comprises the following steps: at first subunit in the time, make first image sensor be in opening, and make second image sensor be in closed condition.In time, make first image sensor be in closed condition at second subunit, and make second image sensor be in opening.
In one embodiment of this invention, the per unit time also comprised for one the 3rd subunit time, and control method also comprises the following steps.In time, make first light source and secondary light source all be in closed condition at the 3rd subunit.In addition, with first image sensor first subunit of per unit time in the time measured image brilliance deduct first image sensor at the 3rd subunit of the unit interval of correspondence measured image brilliance in the time, to obtain one first touch-control image.Moreover, with second image sensor second subunit of per unit time in the time measured image brilliance deduct second image sensor at the 3rd subunit of the unit interval of correspondence measured image brilliance in the time, to obtain one second touch-control image.Afterwards, judge the position of touch object according to the first touch-control image and the second touch-control image with respect to display surface.
In one embodiment of this invention, touch-control module also comprises one the 3rd image sensor and one the 4th image sensor, and it is disposed at display surface other one the 5th position and one the 6th position respectively.Light source can also comprise one the 3rd light source and one the 4th light source, and it is disposed at display surface other one the 7th position and a 8 positions respectively.The per unit time can also comprise one the 4th subunit time and one the 5th subunit time, control method is suitable for Sustainable Control the 3rd light source, the 4th light source, the 3rd image sensor and the 4th image sensor in these continuous unit interval, and control method also comprises the following steps.In time, also make the 3rd light source and the 4th light source be in closed condition at first subunit.In time, also make the 3rd light source and the 4th light source be in closed condition at second subunit.In time, make the 3rd light source be in opening at the 4th subunit, and make first, second and the 4th light source be in closed condition.In time, make the 4th light source be in opening at the 5th subunit, and make first, second and third light source be in closed condition.
In one embodiment of this invention, the quantity of touch object for example is two.When these touch objects these unit interval be positioned at sensing space simultaneously in one of them at least the time, in the unit interval, first, second, can each have at least one reflective spot in the touch-control image that the 3rd and the 4th image sensor is sensed, and first, second, at least wherein can each have two reflective spots in the touch-control image that the two sensed of the 3rd and the 4th image sensor, and control method also comprises the position of these reflective spots of comparison in these touch-control images, with reject these touch objects the position of non-existent relative display surface, and determine the position of the relative display surface of these touch objects.
In one embodiment of this invention, control method also comprises and makes first image sensor and second image sensor all be maintained at opening in the All Time of per unit in the time.
An embodiment more of the present invention proposes a kind of control method, and it is suitable for controlling a touch-control module.Touch-control module is applicable to a display, and display has a display surface.Touch-control module comprises one first light source, a secondary light source, one first image sensor and one second image sensor.First image sensor and second image sensor are disposed at display surface other a primary importance and a second place respectively, and first light source and secondary light source are disposed at one the 3rd position and one the 4th position by the display surface respectively.Control method is suitable for Sustainable Control first light source and secondary light source in a plurality of continuous unit interval.The per unit time comprises one first subunit time and one second subunit time, and control method comprises the following steps., make first light source be in opening, and make secondary light source be in closed condition in the time at first subunit., make first light source be in closed condition, and make secondary light source be in opening in the time at second subunit.When a touch object enters sensing space, make the image of first image sensor and the second image sensor sensing touch object.Then, the image that is sensed according to first image sensor and second image sensor is judged the position of touch object with respect to display surface.
Another embodiment of the present invention proposes a kind of Touch Screen, and it comprises a display, at least two touch control units and a control module.Display has a display surface.These touch control units are disposed at by the display surface, and each touch control unit comprises a light source and an image sensor.Light source is disposed at by the display surface, and a sensing space that is suitable for before display surface is sent a light beam.Image sensor is disposed at by the display surface, and the sensing face of image sensor is towards sensing space, and wherein image sensor is suitable for catching the bright spot in the sensing space, and produces a signal of video signal.Control module is electrically connected to these light sources and these image sensors, and wherein control module is suitable for receiving these signal of video signal from these image sensors, and judges the position of bright spot with respect to display surface according to these signal of video signal.
In one embodiment of this invention, control module is suitable for driving in turn these light sources in these touch control units.
In one embodiment of this invention, after control module is finishing to drive the light source of one of these touch control units, and before open driving another light source of these touch control units, control module is suitable for making these light sources of these touch control units to keep closing, and control module is suitable for image brilliance that the image sensor with each touch control unit sensed and deducts at these light sources and keep the image brilliance that sensed when closing when the light source of touch control unit is driven, obtaining a touch-control image, and judge the position of bright spot according to the touch-control image.
In one embodiment of this invention, control module comprises a binary signal processor and a back-end processor at least.These signal processors are electrically connected to the image sensor of these touch control units respectively, and wherein each signal processor is suitable for judging according to the image that the corresponding image sensor is sensed the position of bright spot, and produce dimension coordinate signal one by one.Back-end processor is electrically connected to these signal processors, and wherein back-end processor is suitable for receiving these one dimension coordinate signals that these signal processors produce, and judges the position of bright spot with respect to display surface according to these one dimension coordinate signals.
In one embodiment of this invention, control module is suitable for making these image sensors to catch bright spot in the sensing space repeatedly, and judges the change in location of bright spot by this.
In Touch Screen, touch-control module and the control method thereof of embodiments of the invention, image sensor is in order to catch bright spot, promptly to catch the reflected light of touch object.Compared to adopting the touch-control module of catching dim spot (promptly catching chopping point), it must be disposed at the display surface edge to form good backlight by reflecting strips or light-emitting section, the Touch Screen of embodiments of the invention and touch-control module structure can be comparatively simple, this helps to reduce the cost of Touch Screen and touch-control module, and also can make Touch Screen comparatively attractive in appearance.
In addition, in Touch Screen, touch-control module and the control method thereof of embodiments of the invention, be to adopt to make light source be in the method for opening in turn, avoid image sensor to be subjected to the interference of the unnecessary light beam that light source sent, so the False Rate of the Touch Screen of embodiments of the invention, touch-control module and control method thereof is lower.
For above-mentioned feature and advantage of the present invention can also be become apparent, embodiment cited below particularly and conjunction with figs. elaborate.
Description of drawings
Figure 1A is the Touch Screen of one embodiment of the invention and the front view of job platform.
Figure 1B is the diagrammatic cross-section of the Touch Screen of Figure 1A along the I-I line.
Fig. 1 C is the enlarged drawing of the touch control unit among Figure 1A.
Fig. 2 A is the driving time distribution plan of the control module of Figure 1A.
Fig. 2 B is the process flow diagram of control method of the touch-control module of Figure 1A.
Fig. 3 A is the Touch Screen of another embodiment of the present invention and the front view of job platform.
Fig. 3 B is the diagrammatic cross-section of the Touch Screen of Fig. 3 A along the II-II line.
Fig. 4 A is the driving time distribution plan of the control module of Fig. 3 A.
Fig. 4 B is the process flow diagram of control method of the touch-control module of Fig. 3 A.
Fig. 5 A is the Touch Screen of another embodiment of the present invention and the front view of job platform.
Fig. 5 B is the diagrammatic cross-section of the Touch Screen of Fig. 5 A along the III-III line.
Fig. 5 C illustrates another variation of the Touch Screen of Fig. 5 B.
Fig. 6 A is the Touch Screen of an embodiment more of the present invention and the front view of job platform.
Fig. 6 B is the diagrammatic cross-section of the Touch Screen of Fig. 6 A along the IV-IV line.
Fig. 7 is the Touch Screen of another embodiment of the present invention and the front view of job platform.
Fig. 8 A is the driving time distribution plan of the control module of Fig. 7.
Fig. 8 B is the process flow diagram of control method of the touch-control module of Fig. 7.
Fig. 9 is the Touch Screen of another embodiment of the present invention and the front view of job platform.
Accompanying drawing primary clustering symbol description
50,50a, 50b: touch object; 70: environment light source; 72: surround lighting; 90: job platform; 100,101,102,103,104,105: Touch Screen; 200,201: display; 210: display surface; 220: frame; 222: depression; 224: front surface; 300,302,305: touch-control module; 310: touch control unit; 312: light source; 312a: first light source; 312b: secondary light source; 312c: the 3rd light source; 312d: the 4th light source; 313: light beam; 314: image sensor; 314a: first image sensor; 314b: second image sensor; 314c: the 3rd image sensor; 314d: the 4th image sensor; 315: sensing face; 316: image-forming assembly; 318,318a, 318b: signal processor; 319: back-end processor; 320: control module; 330: the extinction bar; 330a: refractive power bar; S: sensing space; S110, S110 ', S110 ", S112, S112 ", S114, S114 ", S116, S116 ", S118 ", S120, S120 ', S120 ", S122, S124: step; T, T ', T ": the unit interval; U1: the first subunit time; U2: the second subunit time; U3: the 3rd subunit time; U4: the 4th subunit time; U5: the 5th subunit time.
Embodiment
Figure 1A is the Touch Screen of one embodiment of the invention and the front view of job platform, and Figure 1B is the diagrammatic cross-section of the Touch Screen of Figure 1A along the I-I line, and Fig. 1 C is the enlarged drawing of the touch control unit among Figure 1A.
Please refer to Figure 1A, Figure 1B and Fig. 1 C, the Touch Screen 100 of present embodiment comprises a display 200, at least two touch control units 310 and a control module 320.In the present embodiment, touch control unit 310 can constitute a touch-control module 300 with control module 320.Display 200 has a display surface 210.In the present embodiment, it is other that these touch control units 310 are disposed at display surface 210, and each touch control unit 310 comprises an at least one light source 312 (be example with two light sources 312) and an image sensor 314 in Figure 1A.In other words, in the present embodiment, touch-control module 300 comprises at least one light source 312, one first image sensor 314a, one second image sensor 314b and control module 320.
It is other that light source 312 is disposed at display surface 210, and be suitable for sending a light beam 313 that enters the sensing space S before the display surface 210.It is other that image sensor 314 is disposed at display surface 210, and in the present embodiment, the sensing face 315 of image sensor 314 is towards sensing space S.In the present embodiment, the direct of travel of light beam 313 can approximately be parallel to display surface 210, and sensing space S be defined as display surface 210 before 313 of light beams can contain and 314 spaces that can sense of image sensor, its position and scope for example are the position and the scope of the empty frame that Figure 1A and Figure 1B illustrated.In addition, in the present embodiment, the first image sensor 314a is disposed on the other primary importance of display surface 210 (for example position that Figure 1A illustrated), and the second image sensor 314b is disposed on the other second place of display surface 210 (for example position that Figure 1A illustrates).
In the present embodiment, image sensor 314 is suitable for catching the bright spot among the sensing space S, and produces a signal of video signal.Particularly, when at least one touch object 50 (in Figure 1A be example as touch object 50 with a finger) when entering this sensing space S, the first image sensor 314a and the second image sensor 314b can sense 50 beam reflected 313 of touch object, and the image that this object 50 images on the image sensor 314 is a bright spot.In the present embodiment, the image sensor 314 preceding configurable image-forming assemblies 316 that have, so that 50 beam reflected 313 of object are imaged on the image sensor 314, wherein image-forming assembly 316 for example is lens or pin hole.
In the present embodiment, control module 320 is electrically connected to these light sources 312 and these image sensors 314, wherein control module 320 is suitable for receiving the signal of video signal from these image sensors 314, and judges the position of bright spot with respect to display surface 210 according to these signal of video signal.In other words, in the present embodiment, control module 320 is suitable for judging the position of touch object 50 with respect to display surface 210 according to the first image sensor 314a and the second image sensor touch object that 314b senses, 50 beam reflected 313.In the present embodiment, light source 312 for example is light emitting diode (light emitting diode, LED), laser diode (laser diode) or other suitable luminescence component, and light beam 313 for example is the electromagnetic wave beam of infrared beam, visible light beam, laser beam or other suitable wavelength coverage, but the present invention is not as limit.In addition, touch object 50 for example is user's the finger or the nib of pointer.
In the present embodiment, control module 320 comprises at least a binary signal processor 318 (be example with binary signal processor 318a and 318b) and a back-end processor 319 in Figure 1A.These signal processors 318 are electrically connected to the image sensor 314 of these touch control units 310 respectively, that is signal processor 318a and signal processor 318b are electrically connected to the first image sensor 314a and the second image sensor 314b respectively.Each signal processor 318 is suitable for judging according to the image that corresponding image sensor 314 is sensed the position of bright spot, and producing dimension coordinate signal one by one, this one dimension coordinate signal for example is an incident angle of representing 50 beam reflected 313 incidental image image-position sensors 314 of touch object.Back-end processor 319 is electrically connected to these signal processors 318, wherein back-end processor 319 is suitable for receiving these one dimension coordinate signals that these signal processors 318 are produced, and judges the position of bright spot with respect to display surface according to these one dimension coordinate signals.Particularly, back-end processor 319 can calculate the position of bright spot with respect to display surface according to two incident angles of two different image sensors 314 of light beam 313 incidents.In the present embodiment, after back-end processor 319 calculates the position of bright spot with respect to display surface, can transmit a position signal to the job platform 90 that is connected with back-end processor 319, so job platform 90 just can be judged the position of touch object 50 picture shown with respect to display surface, realizes touch controllable function thus.In the present embodiment, job platform 90 for example is a computing machine, yet, in other embodiments, job platform 90 can also be a mobile phone body, personal digital assistant (personal digital assistant, PDA) body, digital camera body or other suitable electronic control system or electronic package.
It should be noted that the present invention does not limit the allocation position and deciliter state of signal processor 318 and back-end processor 319.For example, in the present embodiment, signal processor 318 is to be combined in the touch control unit 310, and 318 of rear end processor 319 and signal processors then are to electrically connect with transmission line.Yet in other embodiments, signal processor 318 also can be integrated in the same chip with back-end processor 319.Perhaps, one of them can be integrated in signal processor 318a and signal processor 318b in the same chip with back-end processor 319, and signal processor 318a and signal processor 318b another again by transmission line therewith chip electrically connect.Perhaps, back-end processor 319 also can be integrated in the processor of job platform 90, that is the calculation function of back-end processor 319 can utilize program and processor in the job platform 90 to finish.
In the present embodiment, light source 312 comprises at least one first light source 312a (be example with two first light source 312a) and at least one secondary light source 312b (be example with two secondary light source 312b) in Figure 1A in Figure 1A, it is disposed at display surface 210 other one the 3rd position and one the 4th position (for example position that Figure 1A illustrated) respectively.In the present embodiment, the 3rd position and the 4th position are dropped on respectively by the two adjacent corners of display surface.Primary importance be with by the identical corner of display surface can be dropped in the 3rd position, and the second place is with by the identical corner of display surface can be dropped in the 4th position.In addition, the primary importance and the second place can drop on respectively by adjacent two corners of display surface.In other words, in the present embodiment, the first light source 312a and the first image sensor 314a be incorporated into two touch control units 310 one of them, the secondary light source 312b and the second image sensor 314b are incorporated into another of two touch control units 310, and this two touch control unit 310 is disposed at respectively by adjacent two corners of display surface 210.
Fig. 2 A is the driving time distribution plan of the control module of Figure 1A.Please refer to Figure 1A to Fig. 1 C is Fig. 2 A, and in the present embodiment, control module 320 is suitable for driving in turn these and touches light source 312 in the unit 310.Particularly, control module 320 is suitable for Sustainable Control first light source 312a and secondary light source 312b in a plurality of continuous unit interval T.The per unit time T can comprise one first subunit time U1 and one second subunit time U2.In the first subunit time U1, control module 320 is suitable for making the first light source 312a to be in opening, and makes secondary light source 312b be in closed condition.In other words, illustrate as Fig. 2 A, that is in the first subunit time U1 with the current drives first light source 312a, and make the electric current by secondary light source 312b be essentially zero.In the second subunit time U2, control module 320 is suitable for making the first light source 312a to be in closed condition, and makes secondary light source 312b be in opening.In other words, illustrate as Fig. 2 A, that is in the first subunit time U1 so that the electric current by the first light source 312a is essentially zero, and with current drives secondary light source 312b.It should be noted that, the waveform of the drive current among Fig. 2 A is to be example with the square wave, but in other embodiments, the waveform of drive current can also be waveform or other erose waveform of sine wave, triangular wave, circle ripple, the asymmetric waveform in the left and right sides, Else Rule shape.
In the present embodiment, in the first subunit time U1, control module 320 is suitable for making the first image sensor 314a to be in opening, and makes the second image sensor 314b be in closed condition, illustrates as Fig. 2 A.In addition, in the second subunit time U2, control module 320 is suitable for making the first image sensor 314a to be in closed condition, and is suitable for making the second image sensor 314b to be in opening.It should be noted that the unlatching of so-called image sensor herein or close to comprise substantial unlatching or close that it is effective or data are invalid perhaps also can be respectively data.
Thus, when the first image sensor 314a opens in the first subunit time U1 and during sensing, just can sense the reflected light of the light beam 313 that the first light source 312a sent, but can not sense the light beam 313 that secondary light source 314b is directed to the light beam 313 of the first image sensor 314a or is delivered to the first image sensor 314a via reflection, therefore the sensing result of the first image sensor 314a can not be subjected to the interference of secondary light source 314b.Otherwise, when the second image sensor 314b opens in the second subunit time U2 and during sensing, just can sense the reflected light of the light beam 313 that secondary light source 312b sent, but can not sense the light beam 313 that the first light source 314a is directed to the light beam 313 of the second image sensor 314b or is delivered to the second image sensor 314b via reflection.Therefore the sensing result of the second image sensor 314b can not be subjected to the interference of the first light source 314a.Do not disturb because 314 sensing result of image sensor can not be subjected to the light source 312 of different touch control units 310, so the False Rate of the Touch Screen 100 of present embodiment and touch-control module 300 thereof is lower.
It should be noted that the present invention does not limit the first subunit time U1 and the second subunit time U2 putting in order and distribution length in unit interval T.For example, in other embodiments, before the second subunit time U2 can come the first subunit time U1.Perhaps, the first subunit time U1 and the second subunit time U2 can join or not join each other, and the first subunit time and the second subunit time also do not have to take whole section unit interval T.In addition, the present invention does not limit the first image sensor 314a and the second image sensor 314b must alternately open.In other embodiments, the first image sensor 314a and the second image sensor 314b can also all be maintained at opening in the All Time in the per unit time T, and control module 320 for example be suitable in the first subunit time U1, getting the sensing result of the first image sensor 314a analyze (that is this moment the first image sensor 314a data for effectively, and the data of the second image sensor 314b are invalid), and the sensing result of in the second subunit time U2, getting the second image sensor 314b analyze (that is this moment the second image sensor 314b data for effectively, and the data of the first image sensor 314a are invalid).Thus, even image sensor 314 is not closed in good time, also can not have influence on the judged result of the position of 320 pairs of touch objects 50 of control module.
In the Touch Screen 100 and touch-control module 300 of present embodiment, image sensor 312 is in order to catch bright spot, promptly to catch the reflected light of touch object 50.Compared to adopting the touch-control module of catching dim spot (promptly catching chopping point), it must be disposed at the display surface edge to form good backlight by reflecting strips or light-emitting section, the Touch Screen 100 and the touch-control module 300 of present embodiment must not install these reflecting strips or light-emitting section additional, therefore structure is comparatively simple, and help to reduce the cost of Touch Screen 100 and touch-control module 300, and also can make Touch Screen 100 comparatively attractive in appearance.In addition, the touch-control module 300 of present embodiment is to be arranged at display surface 210 sides, and can not block from the light of display surface 210 outgoing.Can influence the optical quality of display compared to known touch control film because of covering display surface, the touch-control module 300 of present embodiment can not influence the optical quality of display 200, so the Touch Screen 100 of present embodiment has preferable optical quality.
In addition, in the present embodiment, control module 320 is suitable for making image sensor 314 to catch bright spot among the sensing space S repeatedly, and judges the change in location of bright spot thus.Thus, job platform 90 just can be learnt the motion state of touch object 50, to realize being similar to the function of mouse drag.
It should be noted that, the present invention does not limit touch-control module 300 must have light source 312, in other embodiments, touch-control module 300 also can not have light source 312, and light beam 313 is provided by other light source light emitting source or the reflection source of environment (for example by).
Fig. 2 B is the process flow diagram of control method of the touch-control module of Figure 1A.Please refer to Figure 1A, Fig. 2 A and Fig. 2 B, the control method of present embodiment is suitable for controlling the touch-control module 300 of Figure 1A, and this control method can be carried out by control module 320.The control method of present embodiment comprises the following steps:
At first, execution in step S110, step S110 is for when entering sensing space S, making the first image sensor 314a and the second image sensor 314b sense touch object institute beam reflected when at least one touch object 50 (be in the present embodiment be example with a touch object 50).In the present embodiment, step S110 comprises step S112 and step S114.Step S112 is in the first subunit time U1, makes the first light source 312a be in opening, and makes secondary light source 312b be in closed condition.Step S114 is in the second subunit time U2, makes the first light source 312a be in closed condition, and makes secondary light source 312b be in opening.In the present embodiment, step S114 carries out after step S112, yet in other embodiments, both execution sequences can also be exchanged.
When execution in step S112, the control method of present embodiment can also comprise makes the first image sensor 314a be in opening, and makes the second image sensor 314b be in closed condition.In addition, when execution in step S114, the control method of present embodiment can also comprise makes the first image sensor 314a be in closed condition, and makes the second image sensor 314b be in opening.Yet, in other embodiments, can also make the first image sensor 314a and the second image sensor 314b in the All Time of per unit in the time, all be maintained at opening.
Then, execution in step S120, step S120 is for judging the position of touch object 50 with respect to display surface 210 according to the first image sensor 314a and the second image sensor touch object that 314b senses, 50 beam reflected 313.
Afterwards, but repeated execution of steps S110 and S120, the change in location state of just sustainable sensing touch object 50 like this.
The control method of present embodiment adopts the mode of sensing bright spot (being touch object 50 reflective spots).Must utilize reflecting strips or light-emitting section compared to the mode that adopts sensing dim spot (being the touch object chopping point), the control method of present embodiment need not to utilize reflecting strips or light-emitting section, therefore helps to simplify the structure of touch-control module 300.In addition, make the alternately mode of flicker of light source 312, so image sensor 314 can not be subjected to the interference of the light source 312 of different touch control unit 310, so the control method of present embodiment has lower False Rate because the control method of present embodiment adopts.
Fig. 3 A is the Touch Screen of another embodiment of the present invention and the front view of job platform, and Fig. 3 B is the diagrammatic cross-section of the Touch Screen of Fig. 3 A along the II-II line, and Fig. 4 A is the driving time distribution plan of the control module of Fig. 3 A.Please refer to Fig. 3 A, Fig. 3 B and Fig. 4 A, the Touch Screen 101 of present embodiment is similar with above-mentioned Touch Screen 100 (illustrating as Figure 1A and Figure 1B), and both difference is as described below.In the Touch Screen 100 of Figure 1B, display surface 210 indents are in the frame 220 of display 200.Yet in the Touch Screen of present embodiment, the surface of display surface 210 and frame 220 in fact at grade.When using this kind display 201, environment light source 70 (for example being light emitting source or the reflection source) surround lighting 72 that is sent interferes with the sensing result of image sensor 314 easily.For head it off, in the present embodiment, per unit time T ' also comprise one the 3rd subunit time U3.In the 3rd subunit time U3, control module 320 is suitable for making the first light source 312a and secondary light source 312b all to be in closed condition.Control module 320 is suitable for the first image sensor 314a in the per unit time T ' the first subunit time U1 in measured image brilliance deduct the first image sensor 314a measured image brilliance in the 3rd subunit time U3 of the unit interval of correspondence T ', to obtain one first touch-control image.Control module 320 is suitable for the second image sensor 314b in the per unit time T ' the second subunit time U2 in measured image brilliance deduct the second image sensor 314b measured image brilliance in the 3rd subunit time U3 of the unit interval of correspondence T ', to obtain one second touch-control image.Control module is judged the position of touch object 50 with respect to display surface according to the first touch-control image and the second touch-control image.In other words, in the 3rd subunit time U3, the first image sensor 314a and the second image sensor 314b all are in opening.Yet, in other embodiments, the 3rd subunit time U3 can also be divided into two different subunit times, and the first image sensor 314a and the second image sensor 314b open in the time at this two different subunit respectively.
By the mode that control module 320 subtracts each other image brilliance, the image that just deductible surround lighting 72 is caused so still can obtain the tram of touch object 50, and not be subjected to the interference of surround lighting 72.This kind touch-control module 300 also can be applicable on the projection screen.Because projection screen do not have frame, also be subjected to the interference of surround lighting easily, the touch-control module 300 of present embodiment is effective head it off then.In addition, the touch-control module 300 of present embodiment also can be applicable in the Touch Screen 100 of Figure 1A, to solve the interference of the surround lighting that relative display surface 210 tilts.
It should be noted that in other embodiments the order of first, second and third subunit time U1, U2, U3 also can be changed into other any possible order.
Fig. 4 B is the process flow diagram of control method of the touch-control module of Fig. 3 A.Please refer to Fig. 3 A, Fig. 4 A and Fig. 4 B, the control method of the control method of present embodiment and Fig. 2 B is similar, and both difference is as described below:
In the present embodiment, step S110 ' also comprises step valve S116, and step S116 is in the 3rd subunit time U3, makes the first light source 312a and secondary light source 312b all be in closed condition.In addition, in the present embodiment, step S120 ' comprises step S122 and step S124.Step S122 is for to deduct the first image sensor 314a measured image brilliance in the 3rd subunit time U3 with the first image sensor 314a measured image brilliance in the first subunit time U1, to obtain one first touch-control image.Moreover, the second image sensor 314b measured image brilliance in the second subunit time U2 is deducted the second image sensor 314b measured image brilliance in the 3rd subunit time U3, to obtain one second touch-control image.In addition, the step, valve S124 carried out behind step S122, and step S124 is for to judge the position of touch object 50 with respect to display surface according to the first touch-control image and the second touch-control image.
By the mode that image brilliance is subtracted each other, the image that just deductible surround lighting 72 is caused so still can obtain the tram of touch object 50, and not be subjected to the interference of surround lighting 72.This kind control method also can be applicable on the projection screen.Because projection screen do not have frame, also be subjected to the interference of surround lighting easily, and the effective head it off of the controlling party rule of present embodiment.In addition, the control method of present embodiment also can be applicable in the Touch Screen 100 of Figure 1A, to solve the interference of the surround lighting that relative display surface 210 tilts.
Fig. 5 A is the Touch Screen of another embodiment of the present invention and the front view of job platform, and Fig. 5 B is the diagrammatic cross-section of the Touch Screen of Fig. 5 A along the III-III line.Please refer to Fig. 5 A and Fig. 5 B, the Touch Screen 102 of present embodiment is similar with above-mentioned Touch Screen 100 (illustrating as Figure 1A and Figure 1B), and both difference is as described below.In the present embodiment, touch-control module 302 also comprises at least one extinction bar 330 (among Fig. 5 A be example with three extinction bars 330), and it is disposed at the going up of display surface 210 (among Fig. 5 A be example to be disposed on three limits) at least on one side.Extinction bar 330 can absorb the light beam 313 from light source 212 that originally can beat on frame 220, and then avoids 220 beam reflected 313 of frame to cause interference to the image sensor 314 of different touch control units 310.In another embodiment, illustrate as Fig. 5 C, extinction bar 330 can also replace with refractive power bar 330a, refractive power bar 330a is suitable for light beam 313 toward the directions reflection away from display surface 210, so just can avoid 220 beam reflected 313 of frame to cause interference to the image sensor 314 of different touch control units 310.
Fig. 6 A is the Touch Screen of an embodiment more of the present invention and the front view of job platform, and Fig. 6 B is the diagrammatic cross-section of the Touch Screen of Fig. 6 A along the IV-IV line.Please refer to Fig. 6 A and Fig. 6 B, the Touch Screen 103 of present embodiment is similar with above-mentioned Touch Screen 102 (illustrating as Fig. 5 A and Fig. 5 B), and both difference is as described below.The Touch Screen 103 of present embodiment is that Fig. 5 A is replaced into the display 201 identical with Fig. 3 B with the display 200 of the Touch Screen 102 of Fig. 5 B.In addition, the extinction bar 330 of the touch-control module 302 of Fig. 5 A and Fig. 5 B is the depressions 222 that place frame 220 to be centered on, but 330 of the extinction bars of the touch-control module 303 of present embodiment are to place on the front surface 224 of frame 220.The extinction bar 330 of present embodiment can absorb the surround lighting that is parallel to display surface 210, in order to avoid keep away the sensing result of ambient light interference image sensor 314.
Fig. 7 is the Touch Screen of another embodiment of the present invention and the front view of job platform, and Fig. 8 A is the driving time distribution plan of the control module of Fig. 7.Please refer to Fig. 7 and Fig. 8 A, the Touch Screen 104 of present embodiment is similar with the Touch Screen 100 of Figure 1A, and both difference is as described below.In the present embodiment, Touch Screen more than 104 two touch-control modules 310.Particularly, touch-control module 304 also comprises one the 3rd image sensor 314c and one the 4th image sensor 314d, it is disposed at one the 5th position and one the 6th position (for example position that Fig. 7 illustrated) on display surface 210 sides respectively, in the present embodiment, the sensing face 315 of the 3rd image sensor 314c and the 4th image sensor 314d is towards sensing space S.In the present embodiment, four touch-control modules 310 are disposed at four corners of display surface 210 respectively.Yet in other embodiments, touch-control module 310 can also be disposed at other suitable position.
Light source 312 can also comprise at least one the 3rd light source 312c (be example with two the 3rd light source 312c) and one the 4th light source 312d (be example with two the 4th light source 312d) in Fig. 7 in Fig. 7, it is disposed at display surface 210 other one the 7th position and a 8 positions (for example position that Fig. 7 illustrated) respectively.The per unit time T " also comprise one the 4th subunit time U4 and one the 5th subunit time U5.In the first subunit time U1, control module 324 is suitable for also making the 3rd light source 312c and the 4th light source 312d to be in closed condition.In the second subunit time U2, control module 324 is suitable for also making the 3rd light source 312c and the 4th light source 312d to be in closed condition.In the 4th subunit time U4, control module 324 is suitable for making the 3rd light source 312c to be in opening, and makes first, second and the 4th light source 312a, 312b, 312d be in closed condition.In the 5th subunit time U5, control module 324 is suitable for making the 4th 312d of light source place in opening, and makes first, second and third light source 312a, 312b, 312c be in closed condition.In the present embodiment, the first, second, third and the 4th image sensor 314a, 314b, 314c, 314d can be respectively at opening and sensing image among the first, second, third and the 4th subunit time U1, U2, U3, the U4.Yet in other embodiments, the first, second, third and the 4th image sensor 314a, 314b, 314c, 314d also can be in the per unit time T " in All Time in connect and keep unlatching.
In an embodiment, the quantity of touch object 50 for example is two, i.e. touch object 50a and touch object 50b.When these touch objects 50 at these unit interval T " be positioned at sensing space S simultaneously in one of them at least the time; at this unit interval T " in, can each have at least one reflective spot in the touch-control image that the first, second, third and the 4th image sensor 314a, 314b, 314c, 314d sensed.For example, because the first image sensor 314a, touch object 50b, touch object 50a and the 4th image sensor 314d are arranged in online always, therefore the first image sensor 314a only can sense the formed reflective spot of touch object 50b, but can not sense the formed reflective spot of touch object 50a.Otherwise the 4th image sensor 314d only can sense the formed reflective spot of touch object 50a, but can not sense the formed reflective spot of touch object 50b.Therefore the first image sensor 314a and the 4th each device of image sensor 314d only can sense a reflective spot.In addition, can each have two reflective spots in the touch-control image that at least wherein the two sensed of the first, second, third and the 4th image sensor 314a, 314b, 314c, 314d.For example, in the present embodiment, second and third image sensor 314b, each self energy of 314c sense two reflective spots.Thus, in the present embodiment, in four one dimension coordinate signals that the first, second, third and the 4th image sensor 314a, 314b, 314c, 314d exported, each self-contained two one dimension coordinate of two meetings are arranged wherein, in addition two each self-contained one one dimension coordinates then.Thus, just can be combined into position, and not meet with actual conditions more than two touch object 50.In addition, in common situation, four one dimension coordinate signals are understood each self-contained two one dimension coordinate, more than this can be combined into the incongruent position of actual conditions.
In order to solve this problem, control module 324 is suitable for comparing the position of these reflective spots in these touch-control images, rejecting the position of 50 non-existent relative display surfaces 210 of these touch objects, and determines the position of these touch object 50 relative display surfaces.In other words, control module 324 is after receiving four one dimension coordinate signals and calculating the data of a plurality of positions thus, and the common factor person of desirable these data is used as the physical location of touch object 50, and other data are then rejected.Thus, the Touch Screen 104 of present embodiment and touch-control module 304 just can accurately be judged the position of two touch objects 50.According to such principle, just can realize multi-point touch.In addition, along with the increase (for example increasing to more than three) of touch point, the touch control unit 310 more than other embodiments of the invention also can adopt is accurately judged the touch-control of going back multiple spot.
It should be noted that the Touch Screen 104 of present embodiment and the position that touch-control module 304 is not only applicable to judge two touch objects 50.Suppose to have only single touch object 50 to enter under the situation of sensing space S, four one dimension coordinate signals that four image sensors 314 are spread out of only can allow control module 324 calculate a position, and this moment, control module just must not rejected the position data that other and actual state misfit.Moreover, in another embodiment, four touch control units 310 can also be divided into two groups, for example two touch control units 310 in top are one group among Fig. 7, and two touch control units in below are another group among Fig. 7.In addition, the light source 312a and the 312b of that group touch control unit 310 above when the first subunit time U1, opening simultaneously, and close simultaneously the below that group touch control unit 310 light source 312c and 312d.Moreover, the light source 312c and the 312d of that group touch control unit 310 below when the second subunit time U2, opening simultaneously, and close simultaneously the top that group touch control unit 310 light source 312a and 312b.As long as design by light source 312 positions, and the light beam that sent of light source 312 313 that makes that group touch control unit 310 of top direct projection image sensor 314 each other not or hardly, and the light beam that sent of light source 312 313 that makes that group touch control unit 310 of below is direct projection image sensor 314 each other not or hardly, so can reach the effect of the position of correct judgement touch object 50 equally.
Fig. 8 B is the process flow diagram of control method of the touch-control module of Fig. 7.Please refer to Fig. 7, Fig. 8 A and Fig. 8 B, the control method of the control method of present embodiment and Fig. 2 B is similar, and both difference is as described below.At step S110 " step S112 " in, promptly in the first subunit time U1, also make the 3rd light source 312c and the 4th light source 312d be in closed condition.At step S114 " in, promptly in the second subunit time U2, also make the 3rd light source 312c and the 4th light source 312d be in closed condition.In addition, step S110 " also comprise step S116 " with step S118 ".At step S116 " in, promptly in the 4th subunit time U4, make the 3rd light source 312c be in opening, and make first, second and the 4th light source 312a, 312b, 312d be in closed condition.At step S118 " in, promptly in the 5th subunit time U5, make the 4th light source 312d be in opening, and make first, second and third light source 312a, 312b, 312c be in closed condition.In the present embodiment, the quantity of touch object 50 for example is two.When these touch objects 50 at these unit interval T " be positioned at sensing space S simultaneously in one of them at least the time; at this unit interval T " in, at least one reflective spot can be each had in the touch-control image that the first, second, third and the 4th image sensor 314a, 314b, 314c, 314d sensed, and two reflective spots can be each had in the touch-control image that at least wherein the two sensed of the first, second, third and the 4th image sensor 314a, 314b, 314c, 314d.Therefore, in the present embodiment, step S120 " also comprise the comparison position of these reflective spots in these touch-control images, rejecting the position of 50 non-existent relative display surfaces 210 of these touch objects, and determine the position of these touch object 50 relative display surfaces 210.Thus, the control method of present embodiment just can accurately be judged the position of two touch objects 50.
The quantity of the touch control unit 310 that the present invention does not limit Touch Screen and adopted is two or four, in other embodiments, also can adopt the touch control unit 310 of other quantity, below is illustrated for an embodiment.
Fig. 9 is the Touch Screen of another embodiment of the present invention and the front view of job platform.Please refer to Fig. 9, the Touch Screen 105 of present embodiment is similar with the Touch Screen 104 of Fig. 7, and both difference is as described below.In the present embodiment, touch-control module 305 only has three touch control units 310, and one of them touch control unit 310 is positioned on the base of display surface 210.The function of the control module 325 of present embodiment and control method are similar to the embodiment of Fig. 7, Fig. 8 A and Fig. 8 B.For example, control module 325 can drive the light source 312 of three touch control units 310 in turn.In addition, control module 325 can be integrated the bright spot that the image sensor 314 of three touch control units 310 is captured, and rejects incorrect position data, to obtain the tram of two touch objects 50.In addition, present embodiment adopts three touch control units 310 also to help to promote the accuracy of judgement of the position of single touch object 50.
In sum, in Touch Screen, touch-control module and the control method thereof of embodiments of the invention, image sensor is in order to catch bright spot, promptly to catch the reflected light of touch object.Compared to adopting the touch-control module of catching dim spot (promptly catching chopping point), it must be disposed at the display surface edge to form good backlight by reflecting strips or light-emitting section, the Touch Screen of embodiments of the invention and touch-control module must not install these reflecting strips or light-emitting section additional, therefore structure is comparatively simple, and help to reduce the cost of Touch Screen and touch-control module, and also can make Touch Screen comparatively attractive in appearance.
In addition, in Touch Screen, touch-control module and the control method thereof of embodiments of the invention, be to adopt to make light source be in the method for opening in turn, avoid image sensor to be subjected to the interference of the unnecessary light beam that light source sent, so the False Rate of the Touch Screen of embodiments of the invention, touch-control module and control method thereof is lower.
Though the present invention specifically describes as above with embodiment; right its is not in order to limit the present invention; those skilled in the art without departing from the spirit and scope of the present invention; when doing a little also moving and retouching, so the content that protection scope of the present invention should be defined with the claim scope of application is as the criterion.
Claims (5)
1. Touch Screen comprises:
One display has a display surface;
At least two touch control units are disposed at by this display surface, and each this touch control unit comprises:
One light source is disposed at by this display surface, and a sensing space that is suitable for before this display surface is sent a light beam; And
One image sensor is disposed at by this display surface, and the sensing face of this image sensor is towards this sensing space, and wherein this image sensor is suitable for catching the bright spot in this sensing space, and produces a signal of video signal; And
One control module is electrically connected to those light sources and those image sensors, and wherein this control module is suitable for receiving those signal of video signal from those image sensors, and judges the position of this bright spot with respect to this display surface according to those signal of video signal.
2. Touch Screen as claimed in claim 1, wherein, this control module is suitable for driving in turn those light sources in those touch control units.
3. Touch Screen as claimed in claim 2, wherein, after this control module is finishing to drive this light source of one of those touch control units, and before opening another this light source that drives those touch control units, this control module is suitable for making those light sources of those touch control units to keep closing, and this control module is suitable for image brilliance that this image sensor with each this touch control unit sensed and deducts at those light sources and keep the image brilliance that sensed when closing when this light source of this touch control unit is driven, obtaining a touch-control image, and judge the position of this bright spot according to this touch-control image.
4. Touch Screen as claimed in claim 1, wherein, this control module comprises:
At least binary signal processor is electrically connected to this image sensors of those touch control units respectively, and wherein each this signal processor is suitable for judging according to the image that this image sensor sensed of correspondence the position of this bright spot, and produces dimension coordinate signal one by one; And
One back-end processor is electrically connected to those signal processors, and wherein this back-end processor is suitable for receiving those one dimension coordinate signals that those signal processors produce, and judges the position of this bright spot with respect to this display surface according to those one dimension coordinate signals.
5. Touch Screen as claimed in claim 1, wherein, this control module is suitable for making those image sensors to catch bright spot in this sensing space repeatedly, and judges this bright spot change in location thus.
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| CN2011100516971A CN102129330A (en) | 2009-07-07 | 2009-07-07 | Touch control screen, touch control module and control method |
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| CN2011100516971A CN102129330A (en) | 2009-07-07 | 2009-07-07 | Touch control screen, touch control module and control method |
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| CNA200910150400XA Division CN101582001A (en) | 2009-07-07 | 2009-07-07 | Touch control screen, touch control module and control method |
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| CN103186291A (en) * | 2011-12-29 | 2013-07-03 | 原相科技股份有限公司 | Optical touch system |
| CN104850272A (en) * | 2014-02-18 | 2015-08-19 | 纬创资通股份有限公司 | Optical image type touch system and touch image processing method |
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| CN103186291A (en) * | 2011-12-29 | 2013-07-03 | 原相科技股份有限公司 | Optical touch system |
| CN103186291B (en) * | 2011-12-29 | 2015-12-02 | 原相科技股份有限公司 | Optical touch control system |
| CN104850272A (en) * | 2014-02-18 | 2015-08-19 | 纬创资通股份有限公司 | Optical image type touch system and touch image processing method |
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Application publication date: 20110720 |