CN101876867A - Optical type touch device and operating method thereof - Google Patents
Optical type touch device and operating method thereof Download PDFInfo
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- CN101876867A CN101876867A CN2009101372655A CN200910137265A CN101876867A CN 101876867 A CN101876867 A CN 101876867A CN 2009101372655 A CN2009101372655 A CN 2009101372655A CN 200910137265 A CN200910137265 A CN 200910137265A CN 101876867 A CN101876867 A CN 101876867A
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Abstract
The invention provides an optical type touch device comprising a light source emitting module, an optical module, a light sensing module and a processing module, wherein the optical module and the light sensing module are respectively arranged the first side and the second side of one surface of the optical type touch device; the light source emitting module sequentially emits a first light source and a second light source, and multiple scanning light rays of the second light source are uniformly distributed above the surface; the optical module receives the first light source and uniformly emits multiple light rays; the light sensing module respectively generates a first sensing result and a second sensing result according to the receiving situation of the multiple light rays and the multiple scanning light rays which are received by the light sensing module; and the processing module judges the position of at least one touch point which corresponds to at least one object on the surface according to the first sensing result and the second sensing result. The invention also provides a method for operating the optical type touch device.
Description
Technical field
The present invention is relevant with contactor control device, particularly a kind of optical touch-control device and the operation method thereof that can avoid situation that touch point can't interpretation to take place by the scanning ray that the rotary light source transmitter sends in proper order.
Background technology
In recent years, along with showing relevant science and technology, image constantly develops, not only power saving and not taking up space of touch control type LCD device, also has the advantage that directly to import simultaneously by the way of contact, thereby extensively be subjected to liking of ordinary consumer, become the main flow on the monitor market, and be widely used in each electronic product.In various dissimilar touch-control devices, optical touch-control device is owing to have the good characteristic of light transmission, become to be different from traditional electric resistance touch-control device and another common technology outside the capacitive touch device.
Though there is optical touch-control device only to need can realize promptly that by simple optical element such as lightguide and photoelectric sensor high-resolution touch point detects at present, except a large amount of light emitted device and optical receiver needn't be set, need not adopt triangle location survey method to carry out complicated calculating yet.Yet, when this optical touch-control device is applied to the situation of multi-point touch, because the light of its emission is vertical direction or horizontal direction, cause under some special multi-point touch situation, these touch points even wrongheaded phenomenon can appear judging in this optical touch-control device, the range of application of serious limitation optical touch-control device is demanded urgently overcoming.
Therefore, the present invention proposes a kind of optical touch-control device and operation method thereof, to address the above problem.
Summary of the invention
The present invention proposes a kind of optical touch-control device and the operation method thereof that can avoid the situation that the multiplex touch control point can't judge by the scanning ray that the rotary light source transmitter sends in proper order.First specific embodiment according to the present invention is a kind of optical touch-control device.In this embodiment, this optical touch-control device comprises light source emitting module, optical module, optical sensing module and processing module.Wherein, optical module and optical sensing module be arranged at respectively optical touch-control device a surface first side with respect to second side of first side; Optical sensing module is coupled to processing module.
Light source emitting module is launched first light source and secondary light source in proper order likes, and wherein the multiple tracks scanning ray of secondary light source is distributed in this surface equably.Optical module receives first light source and launches multiple light rays equably.Optical sensing module produces first sensing result and second sensing result according to its reception situation that receives this multiple light rays and this multiple tracks scanning ray respectively, and wherein whether first sensing result is relevant by at least one object blocks in this surface with this multiple light rays and this multiple tracks scanning ray respectively with second sensing result.Processing module is judged at least one touch point position corresponding to this at least one object according to first sensing result and second sensing result on this surface.
A kind of optical touch-control device that the present invention proposes comprises: first light source emitting module, be used for launching in proper order first light source and secondary light source likes, and wherein the multiple tracks scanning ray of secondary light source is distributed in the surface of optical touch-control device equably; First optical module is arranged at lip-deep first side, is used to receive first light source and launches multiple tracks first direction light equably; First optical sensing module, be arranged at surperficial second side that goes up with respect to first side, be used for receiving respectively multiple tracks first direction light and multiple tracks scanning ray and produce first sensing result and second sensing result according to its reception situation that receives multiple tracks first direction light and multiple tracks scanning ray respectively, wherein whether first sensing result is square relevant by at least one object blocks from the teeth outwards with multiple tracks first direction light and multiple tracks scanning ray respectively with second sensing result; And processing module, be coupled to first optical sensing module, be used for judging at least one touch point position from the teeth outwards corresponding at least one object according to first sensing result and second sensing result.
According to optical touch-control device of the present invention, in one embodiment, further comprise: the secondary light source transmitter module, be used for launching in proper order secondary light source likes, the multiple tracks sub-scanning light of secondary light source is distributed in the surface equably, first optical sensing module receives multiple tracks sub-scanning light and produces auxiliary sensing result according to the reception situation that receives multiple tracks sub-scanning light, and processing module is judged at least one touch point position according to first sensing result, second sensing result and auxiliary sensing result.
According to optical touch-control device of the present invention, in one embodiment, further comprise: mode switch module, be coupled to first light source emitting module and secondary light source transmitter module, when mode switch module was switched to specific control mode touch mode, mode switch module optionally started according to specific control mode touch mode or closes first light source emitting module and/or secondary light source transmitter module.
According to optical touch-control device of the present invention, in one embodiment, the secondary light source transmitter module is provided with respect to first light source emitting module, is used to provide the secondary light source that has with the different emission angles of first light source emitting module.
According to optical touch-control device of the present invention, in one embodiment, the secondary light source transmitter module is different from arbitrary position of first light source emitting module around being arranged at optical touch-control device movably.
According to optical touch-control device of the present invention, in one embodiment, first light source emitting module and secondary light source transmitter module are rotary light emitted device.
According to optical touch-control device of the present invention, in one embodiment, first light source emitting module be arranged at movably optical touch-control device around, when first light source emitting module moves to arbitrary other positions around the optical touch-control device, first light source emitting module is also launched secondary light source in proper order likes, the multiple tracks sub-scanning light of secondary light source is distributed in the surface equably, first optical sensing module receives multiple tracks sub-scanning light and produces auxiliary sensing result according to the reception situation that receives multiple tracks sub-scanning light, and processing module is according to first sensing result, second sensing result and auxiliary sensing result are judged at least one touch point position.
According to optical touch-control device of the present invention, in one embodiment, first optical module comprises a plurality of light elements, first optical sensing module comprises a plurality of photoelectricity sensing cells, the first photoelectricity sensing cell in a plurality of photoelectricity sensing cells is corresponding to first light element and primary importance in a plurality of light elements, and is used to receive the first direction light that first light element is launched.
According to optical touch-control device of the present invention, in one embodiment, the first direction light of launching when first light element is during by object blocks, the first photoelectricity sensing cell will send not received signal, and first optical sensing module is according to received signal and the pairing primary importance of the first photoelectricity sensing cell do not produce first sensing result.
According to optical touch-control device of the present invention, in one embodiment, the surface of first optical sensing module is provided with a plurality of noises and gets rid of structure, a plurality of noises are got rid of structures and are corresponded respectively to a plurality of photoelectricity sensing cells, receive other adjacent first direction light except corresponding first direction light to avoid each photoelectricity sensing cell.
According to optical touch-control device of the present invention, in one embodiment, noise is got rid of structure and is had depressed part or hole, be used for ccontaining corresponding photoelectricity sensing cell in it, noise is got rid of structure and only can be allowed corresponding first direction light to inject the photoelectricity sensing cell through depressed part or hole.
According to optical touch-control device of the present invention, in one embodiment, further comprise: second optical module, be arranged at lip-deep the 3rd side, the 3rd light source that being used to receive first light source emitting module is provided is also launched multiple tracks second direction light equably; And second optical sensing module, being arranged at the surface goes up with respect to the 4th side of the 3rd side and is coupled to processing module, be used for receiving respectively multiple tracks second direction light and multiple tracks scanning ray and produce the 3rd sensing result and the 4th sensing result according to its reception situation that receives multiple tracks second direction light and multiple tracks scanning ray respectively, wherein whether the 3rd sensing result is square relevant by at least one object blocks from the teeth outwards with multiple tracks second direction light and multiple tracks scanning ray respectively with the 4th sensing result, and processing module is according to first sensing result, second sensing result, the 3rd sensing result and the 4th sensing result are judged at least one touch point position from the teeth outwards.
According to optical touch-control device of the present invention, in one embodiment, further comprise: the secondary light source transmitter module, be used for launching in proper order secondary light source likes, the multiple tracks sub-scanning light of secondary light source is distributed in the surface equably, first optical sensing module and second optical sensing module receive multiple tracks sub-scanning light and produce auxiliary sensing result according to the reception situation that receives multiple tracks sub-scanning light, and processing module is according to first sensing result, second sensing result, the 3rd sensing result, the 4th sensing result and auxiliary sensing result are judged at least one touch point position.
Second specific embodiment according to the present invention is a kind of optical touch-control device operation method.In this embodiment, this optical touch-control device comprises light source emitting module, optical module, optical sensing module and processing module, optical module and optical sensing module be arranged at respectively optical touch-control device a surface first side with respect to second side of first side.This method comprises the following step: (a) light source emitting module is launched first light source and secondary light source in proper order likes, and wherein the multiple tracks scanning ray of secondary light source is distributed in this surface equably; (b) optical module receives first light source and launches multiple light rays equably; (c) optical sensing module produces first sensing result and second sensing result according to its reception situation that receives this multiple light rays and this multiple tracks scanning ray respectively; (d) processing module is judged at least one touch point position according to first sensing result and second sensing result.
A kind of method of moving optical touch-control device that the present invention proposes, wherein, optical touch-control device comprises first light source emitting module, first optical module, first optical sensing module and processing module, first optical module and first optical sensing module be arranged at respectively optical touch-control device a surface first side with respect to second side of first side, this method comprises the following step: first light source emitting module is launched first light source and secondary light source in proper order likes, and wherein the multiple tracks scanning ray of secondary light source is distributed in the surface equably; First optical module receives first light source and launches multiple tracks first direction light equably; First optical sensing module receives multiple tracks first direction light and multiple tracks scanning ray respectively and produces first sensing result and second sensing result according to its reception situation that receives multiple tracks first direction light and multiple tracks scanning ray respectively, and wherein whether first sensing result is square relevant by at least one object blocks from the teeth outwards with multiple tracks first direction light and multiple tracks scanning ray respectively with second sensing result; And processing module is judged at least one touch point position corresponding at least one object from the teeth outwards according to first sensing result and second sensing result.
Method according to operation optical touch-control device of the present invention, in one embodiment, optical touch-control device further comprises the secondary light source transmitter module, this method further comprises the following step: the secondary light source transmitter module is launched secondary light source in proper order likes, and wherein the multiple tracks sub-scanning light of secondary light source is distributed in the surface equably; First optical sensing module receives multiple tracks sub-scanning light and produces auxiliary sensing result according to the reception situation that receives multiple tracks sub-scanning light; And processing module is judged at least one touch point position according to first sensing result, second sensing result and auxiliary sensing result.
Method according to operation optical touch-control device of the present invention, in one embodiment, optical touch-control device further comprises mode switch module, this method further comprises the following step: when mode switch module was switched to specific control mode touch mode, mode switch module optionally started according to specific control mode touch mode or closes first light source emitting module and/or secondary light source transmitter module.
According to the method for operation optical touch-control device of the present invention, in one embodiment, the secondary light source transmitter module is provided with respect to first light source emitting module, is used to provide the secondary light source that has with the different emission angles of first light source emitting module.
According to the method for operation optical touch-control device of the present invention, in one embodiment, the secondary light source transmitter module is different from arbitrary position of first light source emitting module around being arranged at optical touch-control device movably.
According to the method for operation optical touch-control device of the present invention, in one embodiment, first light source emitting module and secondary light source transmitter module are rotary light emitted device.
Method according to operation optical touch-control device of the present invention, in one embodiment, first light source emitting module be arranged at movably optical touch-control device around, when first light source emitting module moves to arbitrary other positions around the optical touch-control device, first light source emitting module is also launched secondary light source in proper order likes, the multiple tracks sub-scanning light of secondary light source is distributed in the surface equably, first optical sensing module receives multiple tracks sub-scanning light and produces auxiliary sensing result according to the reception situation that receives multiple tracks sub-scanning light, and processing module is according to first sensing result, second sensing result and auxiliary sensing result are judged at least one touch point position.
Method according to operation optical touch-control device of the present invention, in one embodiment, first optical module comprises a plurality of light elements, first optical sensing module comprises a plurality of photoelectricity sensing cells, the first photoelectricity sensing cell in a plurality of photoelectricity sensing cells is corresponding to first light element and primary importance in a plurality of light elements, and is used to receive the first direction light that first light element is launched.
Method according to operation optical touch-control device of the present invention, in one embodiment, the first direction light of launching when first light element is during by object blocks, the first photoelectricity sensing cell will send not received signal, and first optical sensing module is according to received signal and the pairing primary importance of the first photoelectricity sensing cell do not produce first sensing result.
Method according to operation optical touch-control device of the present invention, in one embodiment, optical touch-control device further comprises second optical module and second optical sensing module, second optical module and second optical sensing module be arranged at respectively lip-deep the 3rd side with respect to the 4th side of the 3rd side, this method further comprises the following step: second optical module receives the 3rd light source that first light source emitting module provided and launches multiple tracks second direction light equably; Receive multiple tracks second direction light and multiple tracks scanning ray respectively and produce the 3rd sensing result and the 4th sensing result according to its reception situation that receives multiple tracks second direction light and multiple tracks scanning ray respectively, wherein whether the 3rd sensing result is relevant by at least one object blocks in the surface with multiple tracks second direction light and multiple tracks scanning ray respectively with the 4th sensing result; And processing module is judged at least one touch point position from the teeth outwards according to first sensing result, second sensing result, the 3rd sensing result and the 4th sensing result.
Method according to operation optical touch-control device of the present invention, in one embodiment, optical touch-control device further comprises the secondary light source transmitter module, this method further comprises the following step: the secondary light source transmitter module is launched secondary light source in proper order likes, and wherein the multiple tracks sub-scanning light of secondary light source is distributed in the surface equably; First optical sensing module and second optical sensing module receive multiple tracks sub-scanning light and produce auxiliary sensing result according to the reception situation that receives multiple tracks sub-scanning light; And processing module is judged at least one touch point position according to first sensing result, second sensing result, the 3rd sensing result, the 4th sensing result and auxiliary sensing result.
The present invention also provides a kind of optical touch-control device, and it comprises: transmitter module, be arranged at lip-deep first side of optical touch-control device, and be used to receive first light source and launch multiple light rays equably; Receiver module, be arranged at surperficial second side that goes up with respect to first side, be used for receiving respectively multiple light rays and from the multiple tracks scanning ray of secondary light source, and produce first sensing result and second sensing result according to its reception situation that receives multiple light rays and multiple tracks scanning ray respectively, wherein the multiple tracks scanning ray is distributed in the surface equably, and whether first sensing result is square relevant by at least one object blocks from the teeth outwards with multiple light rays and multiple tracks scanning ray respectively with second sensing result; And processing module, be coupled to receiver module, be used for judging at least one touch point position from the teeth outwards corresponding at least one object according to first sensing result and second sensing result.
Can be further understood by following embodiment and accompanying drawing about the advantages and spirit of the present invention.
Description of drawings
Fig. 1 and Fig. 2 illustrate respectively according to the functional block diagram of the optical touch-control device of first specific embodiment of the present invention and synoptic diagram.
Fig. 3 (A) illustrates the synoptic diagram of optical touch-control device actual motion under the situation of no touch point; Fig. 3 (B) illustrates optical touch-control device and carry out the example that single touch point detects under first control mode touch mode.
Fig. 4 (A) and Fig. 4 (B) illustrate optical touch-control device respectively and carry out the different examples that two touch points detect under second control mode touch modes; Fig. 4 (the C)～different sensing result of Fig. 4 (E) representative.
Fig. 5 (A)～Fig. 5 (D) illustrates optical touch-control device respectively and carry out the different examples that three touch points detect under second control mode touch mode; Fig. 5 (the E)～different sensing result of Fig. 5 (I) representative.
Fig. 6 illustrates the special circumstances that optical touch-control device can't be differentiated under second control mode touch mode.
Fig. 7 (A)～Fig. 7 (B) illustrates optical touch-control device carries out three touch points and the detection of four touch points under the 3rd control mode touch mode different examples respectively; Fig. 7 (the C)～different sensing result of Fig. 7 (D) representative.
Fig. 8 and Fig. 9 illustrate the process flow diagram according to the operation method of optical touch-control device under second control mode touch mode and the 3rd control mode touch mode of second specific embodiment of the present invention respectively.
Embodiment
First specific embodiment according to the present invention is a kind of optical touch-control device.In this embodiment, this optical touch-control device can be applicable to liquid crystal indicator or other display device, has the function of display frame and touch-control input simultaneously.Please refer to Fig. 1 and Fig. 2, Fig. 1 and Fig. 2 illustrate the functional block diagram and the synoptic diagram of this optical touch-control device respectively.
As shown in Figures 1 and 2, optical touch-control device 1 comprises the first rotary light source transmitter module 10a, the second rotary light source transmitter module 10b, first optical module 11, second optical module 12, first optical sensing module 13, second optical sensing module 14, mode switch module 15, processing module 16 and display module 18.Wherein, first optical module 11 and first optical sensing module 13 are arranged at first side and second side on a surface of display module 18 respectively, and first side and second side are toward each other; Second optical module 12 and second optical sensing module 14 are arranged at the 3rd side and the 4th side on this surface of display module 18 respectively, and the 3rd side and the 4th side are toward each other; First optical sensing module 13 and second optical sensing module 14 all are coupled to processing module 16; Mode switch module 15 is coupled to the first rotary light source transmitter module 10a and the second rotary light source transmitter module 10b; Processing module 16 is coupled to display module 18.
In actual applications, the first rotary light source transmitter module 10a and the second rotary light source transmitter module 10b can be integrated into same light source emitting module by suitable structural design.For example, if rotary light source transmitter module 10a is combined with mobile foundation, rotary light source transmitter module 10a can move to this surface any desire emission scan light part on every side by this mobile foundation, so can save the setting of the second rotary light source transmitter module 10b.
Next, will be introduced with regard to each module that optical touch-control device 1 is comprised.At first, the first rotary light source transmitter module 10a and the second rotary light source transmitter module 10b provide optical touch-control device 1 to carry out touch point required light source when detecting respectively under different control mode touch modes.In fact, the user can be switched different control mode touch modes by mode switch module 15, controls the startup of the first rotary light source transmitter module 10a and the second rotary light source transmitter module 10b thus or closes.
In this embodiment, the first rotary light source transmitter module 10a sends first light source, secondary light source and the 3rd light source respectively sequentially by the mode of rotation, wherein, first light emitted to the first optical module 11, the multiple tracks scanning ray that secondary light source comprised intersperses among this surface equably and is received by first optical sensing module 13 and second optical sensing module 14, and the 3rd light source then is emitted to second optical module 12.Launch secondary light source as for the second rotary light source transmitter module 10b sequentially by the mode of rotation, the multiple tracks sub-scanning light that this secondary light source comprised intersperses among this surface equably and is received by first optical sensing module 13 and second optical sensing module 14.In fact, the kind of the light source that the first rotary light source transmitter module 10a and the second rotary light source transmitter module 10b are launched does not then have certain restriction, can be the light source of any pattern.
When first optical module 11 received first light source, first optical module 11 will be launched multiple tracks first direction light parallel to each other equably.Similarly, when second optical module 12 received the 3rd light source, second optical module 12 will be launched multiple tracks second direction light parallel to each other equably.In fact, this multiple tracks first direction light is perpendicular to one another with this multiple tracks second direction light.In this embodiment, first optical module 11 and second optical module 12 are the guiding device (for example light guide plate) of (light-guiding) function that has leaded light, and include a plurality of light elements respectively.
Please refer to Fig. 3 (A), Fig. 3 (A) illustrates the synoptic diagram of optical touch-control device 1 actual motion under the situation of no touch point.Shown in Fig. 3 (A), first optical module 11 and second optical module 12 comprise four first light element E5～E8 and four second light element E1～E4 respectively.Wherein, first light element E5～E8 sends first direction light L parallel to each other respectively
X1～L
X4Second light element E1～E4 sends second direction light L parallel to each other respectively
Y1～L
Y4First optical sensing module 13 comprises four first photoelectricity sensing cell D5～D8; Second optical sensing module 14 comprises four second photoelectricity sensing cell D1～D4.In actual applications, also available two optical modules of first optical sensing module 13 and second optical sensing module 14 (for example light guide plate) replace, these two optical modules receive first direction light and second direction light respectively in proper order likes, the corner that need to be had a common boundary on second limit and the 4th limit of display module 18 this moment is provided with wide-angle photoelectric sensor (not shown), with respectively according to these two optical modules in proper order the formula ground situation that receives light produce sensing result and judge for processing module 16.
Please refer to Fig. 3 (B), Fig. 3 (B) illustrates the example that optical touch-control device 1 detects touch point T under first control mode touch mode.It should be noted that under first control mode touch mode, only need to send first light source to the first optical module 11 respectively and send the 3rd light source to the second optical module 12, need not start the second rotary light source transmitter module 10b by the first rotary light source transmitter module 10a.In fact, touch point T can be formed by any object, for example finger, pointer etc., even the object that forms touch point T not necessarily will touch the surface of display module 18, as long as can stop the lip-deep light of display module 18.
Then, first optical sensing module 13 and second optical sensing module 14 are promptly respectively according to first photoelectricity sensing cell D5～D8 and second photoelectricity sensing cell D1～D4 whether receives first direction light and second direction light produces first sensing result and second sensing result.Afterwards, processing module 16 is promptly according to first sensing result and second sensing result obtains the first photoelectricity sensing cell D6 and the second photoelectricity sensing cell D2 fails to receive the information of light, and to obtain the first photoelectricity sensing cell D6 pairing according to look-up table be the first light element E6 and transverse axis coordinate X
2, and the second photoelectricity sensing cell D2 pairing be the second light element E2 and Z-axis coordinate Y
2Therefore, processing module 16 can judge that this object should be (X at the two-dimensional coordinate of the surperficial formed touch point position of display module 18 according to above-mentioned information
2, Y
2).
As mentioned above, first control mode touch mode can be applicable to the situation of single-point touch fully, yet under some special multi-point touch situation, first control mode touch mode promptly has can't be judged or the generation of wrongheaded phenomenon.At this moment, optical touch-control device 1 promptly must take more accurate second control mode touch mode to carry out the judgement of touch point.Please refer to Fig. 4 (A) and Fig. 4 (B), Fig. 4 (A) and Fig. 4 (B) illustrate optical touch-control device 1 respectively and carry out the different examples that two touch points detect under second control mode touch modes.It should be noted that, under second control mode touch mode, the first rotary light source transmitter module 20a sends first light source La to the first optical module 11 respectively except needs and sends the 3rd light source Lb to the second optical module 12, also need to send sequentially secondary light source and intersperse among this surperficial multiple tracks scanning ray Lc1～Lc8 equably, and the second rotary light source transmitter module still need not start at present to form.
In this embodiment, if take first control mode touch mode that touch point P21, P22 among touch point P11, P12 among Fig. 4 (A) and Fig. 4 (B) are detected, will obtain same sensing result, shown in Fig. 4 (C).At this moment, is it as touch point P11 and the P12 shown in Fig. 4 (A) that processing module 16 promptly is difficult to judge actual touch-control situation according to this sensing result actually? or as touch point P21 and the P22 shown in Fig. 4 (B)? under second control mode touch mode, this puzzlement can be solved by multiple tracks scanning ray Lc1～Lc8 that the first rotary light source transmitter module 20a is sent.
Please refer to Fig. 4 (A) and Fig. 4 (D), blocked scanning ray Lc2～Lc7 owing to form the object of touch point P11, sensing cell D2～D7 all can't receive scanning ray, therefore can obtain the sensing result as Fig. 4 (D).In like manner, please refer to Fig. 4 (B) and Fig. 4 (E), because the object of formation touch point P21 has blocked the object of scanning ray Lc1～Lc2 and formation touch point P22 and has blocked scanning ray Lc7～Lc8, sensing cell D1～D2 and D7～D8 all can't receive scanning ray, thereby can obtain the sensing result as Fig. 4 (E).Clearly, the sensing result of the sensing result of Fig. 4 (D) and Fig. 4 (E) is also inequality, therefore, it is as the touch point P11 shown in Fig. 4 (A) and P12 or as touch point P21 and the P22 shown in Fig. 4 (B) that processing module 16 can be easily judged actual touch-control situation according to sensing result actually, and can not produce touch point obscuring on judging.
Please refer to Fig. 5 (A)～Fig. 5 (D), Fig. 5 (A)～Fig. 5 (D) illustrates optical touch-control device 1 respectively and carry out the different examples that three touch points detect under second control mode touch mode.Similarly, if the touch point of taking first control mode touch mode to carry out these four kinds of situations detects, all can obtain sensing result, thereby processing module 16 can't be differentiated as Fig. 5 (E).But if take second control mode touch mode to detect, then may obtain Fig. 5 (F)～four kinds of different sensing result of Fig. 5 (I), correspond respectively to four kinds of touch-control situations of Fig. 5 (A)～Fig. 5 (D), therefore, why processing module 16 can judge actual touch-control situation according to sensing result easily.
In addition, because second control mode touch mode adopts the scanning ray of formula emission in proper order to scan, receive other adjacent first direction light except corresponding first direction light because of carelessness for fear of the photoelectricity sensing cell, also can be provided with a plurality of noises on the surface of first optical sensing module 13 and get rid of structure, each noise is got rid of structure can have depressed part or hole, be used for ccontaining photoelectricity sensing cell in it, get rid of the setting of structure by these noises, make adjacent first direction light or other noises all be excluded from outside this depressed part or this hole, have only corresponding first direction light to inject this photoelectricity sensing cell, take place with the situation of avoiding the touch point erroneous judgement through this depressed part or this hole.
As mentioned above, second control mode touch mode all can be judged the position of a plurality of touch points really effectively under the situation of the overwhelming majority, yet, still have the special touch-control situation of only a few exception to judge by second control mode touch mode.For example, please refer to Fig. 5 (A) and Fig. 6, though Fig. 5 (A) has only three touch point Fig. 6 that four touch points are then arranged, yet, all can be according to the resulting sensing result of second control mode touch mode as Fig. 5 (F), all sensing cell D1～D8 all can't receive scanning ray, and therefore, processing module 16 can't judge that actual touch-control situation is as shown in Fig. 5 (A) or and Fig. 6 according to this sensing result.At this moment, optical touch-control device 1 promptly need take more accurate the 3rd control mode touch mode to carry out the detection of special multi-touch situation.Shown in Fig. 7 (A) and Fig. 7 (B), under the 3rd control mode touch mode, except the light source that the first rotary light source transmitter module 20a sends originally, the second rotary light source transmitter module 20b also need send multiple tracks sub-scanning light Lc1 '～Lc8 ' and help processing module 16 to judge to produce auxiliary sensing result.
Please refer to Fig. 7 (C) and Fig. 7 (D), Fig. 7 (C) and Fig. 7 (D) illustrate respectively corresponding to the auxiliary sensing result of three touch point P81～P83 among Fig. 7 (A) and corresponding to the auxiliary sensing result of four touch point P91～P94 among Fig. 7 (B).Shown in Fig. 7 (C) and Fig. 7 (D), by with the assistance of the sub-scanning light Lc1 '～Lc8 ' of script scanning ray different angles, two auxiliary sensing result are different significantly, so processing module 16 can be judged easily.Therefore, can fully be applicable to any single-point or multi-point touch situation by above-mentioned different control mode touch mode, and not have the situation generation of erroneous judgement according to optical touch-control device 1 of the present invention.
Second specific embodiment according to the present invention is a kind of optical touch-control device operation method.In this embodiment, optical touch-control device comprises first light source emitting module, secondary light source transmitter module, first optical module, second optical module, first optical sensing module, second optical sensing module, mode switch module and processing module.Wherein, first optical module and first optical sensing module are arranged at first side and second side on a surface of optical touch-control device respectively, and this first side and this second side are toward each other; Second optical module and second optical sensing module are arranged at the 3rd side and the 4th side on this surface respectively, and the 3rd side and the 4th side are toward each other.Because the operation method of optical touch-control device under first control mode touch mode is well known, thereby repeats no more.
Next, will be introduced the operation method of optical touch-control device under second control mode touch mode.As shown in Figure 8, at first, in step S10, mode switch module switches to second control mode touch mode with optical touch-control device.Then, in step S11, first light source emitting module is formula ground emission first light source, secondary light source and the 3rd light source in proper order.In step S12, first optical module receives first light source and launches multiple tracks first direction light equably; In step S13, the multiple tracks scanning ray of secondary light source is distributed in this surface equably; In step S14, second optical module receives the 3rd light source and launches multiple tracks second direction light equably.Next, in step S15, first optical sensing module produces first sensing result and second sensing result according to its reception situation that receives this multiple tracks first direction light and this multiple tracks scanning ray respectively, and wherein whether first sensing result is relevant by at least one object blocks in this surface with this multiple tracks first direction light and this multiple tracks scanning ray respectively with second sensing result.
In like manner, in step S16, second optical sensing module produces the 3rd sensing result and the 4th sensing result according to its reception situation that receives this multiple tracks second direction light and this multiple tracks scanning ray respectively, and wherein whether the 3rd sensing result is relevant by this at least one object blocks in this surface with this multiple tracks second direction light and this multiple tracks scanning ray respectively with the 4th sensing result.Afterwards, in step S17, this processing module is judged at least one touch point position corresponding to this at least one object according to first sensing result, second sensing result, the 3rd sensing result and the 4th sensing result on this surface.
Next, will be introduced the operation method of optical touch-control device under the 3rd control mode touch mode.As shown in Figure 9, at first, in step S20, mode switch module switches to the 3rd control mode touch mode with optical touch-control device.Then, in step S21, first light source emitting module is formula ground emission first light source, secondary light source and the 3rd light source and secondary light source transmitter module emission secondary light source in proper order.In step S22, first optical module receives first light source and launches multiple tracks first direction light equably; In step S23, the multiple tracks scanning ray of secondary light source is distributed in this surface equably; In step S24, second optical module receives the 3rd light source and launches multiple tracks second direction light equably; In step S25, the multiple tracks sub-scanning light of secondary light source is distributed in this surface equably.Then, in step S26, first optical sensing module produces first sensing result and second sensing result according to its reception situation that receives this multiple tracks first direction light and this multiple tracks scanning ray respectively, and wherein whether first sensing result is relevant by at least one object blocks in this surface with this multiple tracks first direction light and this multiple tracks scanning ray respectively with second sensing result.
In like manner, in step S27, second optical sensing module produces the 3rd sensing result and the 4th sensing result according to its reception situation that receives this multiple tracks second direction light and this multiple tracks scanning ray respectively, and wherein whether the 3rd sensing result is relevant by this at least one object blocks in this surface with this multiple tracks second direction light and this multiple tracks scanning ray respectively with the 4th sensing result.It should be noted that in step S28 first optical sensing module and second optical sensing module also can produce auxiliary sensing result according to its reception situation that receives this multiple tracks sub-scanning light.Afterwards, in step S29, processing module is judged on this surface corresponding to this at least one touch point position according to first sensing result, second sensing result, the 3rd sensing result, the 4th sensing result and auxiliary sensing result.
Compared with prior art, according to optical touch-control device of the present invention and operation method thereof except simple design such as original lightguide and photoelectric sensor, also further send the scanning ray that is dispersed in equably on the touch-control surface in proper order by at least one rotary light source transmitter, auxiliary this optical touch-control device carries out the judgement of a plurality of touch points, to avoid to judge that under some special multi-point touch situation touch point even wrongheaded phenomenon take place, and make no matter this optical touch-control device is all touch points that all can judge rightly under any single-point and multi-point touch situation.In addition, the mode switch module of this optical touch-control device also can allow the user can freely select control mode touch mode, and this optical touch-control device promptly can carry out the detection of touch point according to the selected control mode touch mode of user.
By above detailed description to preferred specific embodiment, hope can be known description feature of the present invention and spirit more, and is not to come scope of the present invention is limited with above-mentioned disclosed preferred specific embodiment.On the contrary, its objective is that hope can be contained various changes and identity property is arranged in the scope of claim of the present invention.
The main element symbol description
S10～S29: process step
1: optical touch- control device 10a, 20a: first light source emitting module
11: the first optical module 10b, 20b: secondary light source transmitter module
13: the first optical sensing modules of 12: the second optical modules
16: processing module 18: display module
E1～E8: light element D1～D8: sensing cell
La: the first light source L
X1～L
X4: first direction light
Lb: secondary light source L
Y1～L
Y4: second direction light
Lc1～Lc8: scanning ray Lc1 '～Lc8 ': sub-scanning light
P11～P12, P21～P22, P31～P33, P41～P43, P51～P53, P61～P63, P71～P74, P81～P83, P91～P94, T: touch point.
Claims (10)
1. optical touch-control device comprises:
First light source emitting module is used for launching in proper order first light source and secondary light source likes, and the multiple tracks scanning ray of wherein said secondary light source is distributed in the surface of described optical touch-control device equably;
First optical module is arranged at described lip-deep first side, is used to receive described first light source and launches multiple tracks first direction light equably;
First optical sensing module, be arranged on the described surface second side with respect to described first side, be used for receiving respectively described multiple tracks first direction light and described multiple tracks scanning ray and produce first sensing result and second sensing result according to its reception situation that receives described multiple tracks first direction light and described multiple tracks scanning ray respectively, whether wherein said first sensing result is relevant by at least one object blocks in described surface with described multiple tracks first direction light and described multiple tracks scanning ray respectively with described second sensing result; And
Processing module is coupled to described first optical sensing module, is used for judging at least one touch point position corresponding to described at least one object according to described first sensing result and described second sensing result on described surface.
2. optical touch-control device according to claim 1 further comprises:
The secondary light source transmitter module, be used for launching in proper order secondary light source likes, the multiple tracks sub-scanning light of described secondary light source is distributed in described surface equably, described first optical sensing module receives described multiple tracks sub-scanning light and produces auxiliary sensing result according to the reception situation that receives described multiple tracks sub-scanning light, and described processing module is judged described at least one touch point position according to described first sensing result, described second sensing result and described auxiliary sensing result.
3. optical touch-control device according to claim 2 further comprises:
Mode switch module, be coupled to described first light source emitting module and described secondary light source transmitter module, when described mode switch module was switched to specific control mode touch mode, described mode switch module optionally started according to described specific control mode touch mode or closes described first light source emitting module and/or described secondary light source transmitter module.
4. optical touch-control device according to claim 2, wherein said secondary light source transmitter module is provided with respect to described first light source emitting module, is used to provide the secondary light source that has with the different emission angles of described first light source emitting module.
5. optical touch-control device according to claim 2, wherein said secondary light source transmitter module are different from arbitrary position of described first light source emitting module around being arranged at described optical touch-control device movably.
6. optical touch-control device according to claim 2, wherein said first light source emitting module and described secondary light source transmitter module are rotary light emitted device.
7. optical touch-control device according to claim 1, wherein said first light source emitting module be arranged at movably described optical touch-control device around, when described first light source emitting module moves to arbitrary other positions around the described optical touch-control device, described first light source emitting module is also launched secondary light source in proper order likes, the multiple tracks sub-scanning light of described secondary light source is distributed in described surface equably, described first optical sensing module receives described multiple tracks sub-scanning light and produces auxiliary sensing result according to the reception situation that receives described multiple tracks sub-scanning light, and described processing module is according to described first sensing result, described second sensing result and described auxiliary sensing result are judged described at least one touch point position.
8. optical touch-control device according to claim 1, wherein said first optical module comprises a plurality of light elements, described first optical sensing module comprises a plurality of photoelectricity sensing cells, the first photoelectricity sensing cell in described a plurality of photoelectricity sensing cell is corresponding to first light element and primary importance in described a plurality of light elements, and is used to receive the first direction light that described first light element is launched.
9. method of moving optical touch-control device, described optical touch-control device comprises first light source emitting module, first optical module, first optical sensing module and processing module, described first optical module and described first optical sensing module be arranged at respectively described optical touch-control device a surface first side with respect to second side of described first side, described method comprises the following step:
Described first light source emitting module is launched first light source and secondary light source in proper order likes, and the multiple tracks scanning ray of wherein said secondary light source is distributed in described surface equably;
Described first optical module receives described first light source and launches multiple tracks first direction light equably;
Described first optical sensing module receives described multiple tracks first direction light and described multiple tracks scanning ray respectively and produces first sensing result and second sensing result according to its reception situation that receives described multiple tracks first direction light and described multiple tracks scanning ray respectively, and whether wherein said first sensing result is relevant by at least one object blocks in described surface with described multiple tracks first direction light and described multiple tracks scanning ray respectively with described second sensing result; And
Described processing module is judged at least one touch point position corresponding to described at least one object according to described first sensing result and described second sensing result on described surface.
10. optical touch-control device comprises:
Transmitter module is arranged at lip-deep first side of described optical touch-control device, is used to receive first light source and launches multiple light rays equably;
Receiver module, be arranged on the described surface second side with respect to described first side, be used for receiving respectively described multiple light rays and from the multiple tracks scanning ray of secondary light source, and produce first sensing result and second sensing result according to its reception situation that receives described multiple light rays and described multiple tracks scanning ray respectively, wherein said multiple tracks scanning ray is distributed in described surface equably, and whether described first sensing result is relevant by at least one object blocks in described surface with described multiple light rays and described multiple tracks scanning ray respectively with described second sensing result; And
Processing module is coupled to described receiver module, is used for judging at least one touch point position corresponding to described at least one object according to described first sensing result and described second sensing result on described surface.
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| CN2009101372655A CN101876867B (en) | 2009-04-29 | 2009-04-29 | Optical type touch device and operating method thereof |
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| CN2009101372655A CN101876867B (en) | 2009-04-29 | 2009-04-29 | Optical type touch device and operating method thereof |
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| CN101876867A true CN101876867A (en) | 2010-11-03 |
| CN101876867B CN101876867B (en) | 2012-04-04 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102541356A (en) * | 2010-12-24 | 2012-07-04 | 敦南科技股份有限公司 | Touch point positioning method for optical touch panel and optical touch panel device |
| CN104423724A (en) * | 2013-09-06 | 2015-03-18 | 联想(北京)有限公司 | Touch position determination method and device, circuit, PCB (Printed Circuit Board) and electronic device |
| CN106996799A (en) * | 2017-04-01 | 2017-08-01 | 北京东方计量测试研究所 | Fine setting encoder, system and recognition methods for instrument panel |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100428123C (en) * | 2005-12-27 | 2008-10-22 | 联想(北京)有限公司 | Information input device of digital equipment |
| CN101154137B (en) * | 2006-09-27 | 2010-04-14 | 联想(北京)有限公司 | GUI input mechanism |
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2009
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102541356A (en) * | 2010-12-24 | 2012-07-04 | 敦南科技股份有限公司 | Touch point positioning method for optical touch panel and optical touch panel device |
| CN104423724A (en) * | 2013-09-06 | 2015-03-18 | 联想(北京)有限公司 | Touch position determination method and device, circuit, PCB (Printed Circuit Board) and electronic device |
| CN106996799A (en) * | 2017-04-01 | 2017-08-01 | 北京东方计量测试研究所 | Fine setting encoder, system and recognition methods for instrument panel |
| CN106996799B (en) * | 2017-04-01 | 2019-07-26 | 北京东方计量测试研究所 | Fine tuning encoder, system and recognition methods for instrument panel |
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| CN101876867B (en) | 2012-04-04 |
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