CN102103437A - Optical touch device and positioning method thereof - Google Patents
Optical touch device and positioning method thereof Download PDFInfo
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- CN102103437A CN102103437A CN2009102613409A CN200910261340A CN102103437A CN 102103437 A CN102103437 A CN 102103437A CN 2009102613409 A CN2009102613409 A CN 2009102613409A CN 200910261340 A CN200910261340 A CN 200910261340A CN 102103437 A CN102103437 A CN 102103437A
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Abstract
The invention relates to an optical touch device and a positioning method thereof, wherein the optical touch device comprises a frame, a light source module, first, second and third image detecting components and a mirror surface component, wherein the frame comprises a first wall, a second wall, a third wall and a fourth wall; the first wall is opposite to the third wall; the second wall is opposite to the fourth wall; a region defined by the frame is a sensing region; the light source module is used for providing light rays to the sensing region; the first, second and third image detecting components are respectively arranged between the two adjacent ends of the first wall and the second wall, between the two adjacent ends of the second wall and the third wall and between the two adjacent ends of the first wall and the fourth wall; and the mirror surface component is arranged on the fourth wall. The invention also provides a positioning method of the optical touch device. By utilizing the optical touch device and positioning method thereof provided by the invention, the position of a touch point can be accurately obtained, and the dead zone between the second and third image detecting components is effectively eliminated.
Description
Technical field
The present invention relates to a kind of contactor control device, particularly relate to a kind of optical touch control apparatus and localization method thereof.
Background technology
Touch controllable function has become one of indispensable function of many now electronic installations, and contactor control device is the required common electronics element of realization touch controllable function.At present the kind of contactor control device mainly comprises resistance-type, condenser type, optical profile type etc., and electronic installation can be according to different touch-control demands different types of contactor control device of arranging in pairs or groups.
Fig. 1 is the structural representation of existing known a kind of optical touch control apparatus.Please refer to Fig. 1, existing known optical touch control apparatus 100 comprises a leaded light module 110, a light source module 120 and an image detecting module 130.Wherein, leaded light module 110 comprises reflecting strips 112a, 112b, 112c, the 112d that is arranged in order along four limits of a rectangular path, and the zone in the above-mentioned rectangular path is a sensing region 114.In addition, light source module 120 comprises light- emitting component 122a, 122b, 122c, wherein light-emitting component 122a is arranged between the adjacent both ends of reflecting strips 112a and reflecting strips 112b, light-emitting component 122b is arranged between the adjacent both ends of reflecting strips 112b and reflecting strips 112c, and light-emitting component 122c is arranged between the adjacent both ends of reflecting strips 112a and reflecting strips 112d.Light source module 120 is in order to providing light to reflecting strips 112a, 112b, 112c, 112d, and the light that reflecting strips 112a, 112b, 112c, 112d provide in order to reflection source module 120.In addition, image detecting module 130 comprises image detecting element 132a, 132b, 132c, wherein image detecting element 132a is arranged between the adjacent both ends of reflecting strips 112a and reflecting strips 112b, image detecting element 132b is arranged between the adjacent both ends of reflecting strips 112b and reflecting strips 112c, and image detecting element 132c is arranged between the adjacent both ends of reflecting strips 112a and reflecting strips 112d.
Hold above-mentionedly, whether image detecting module 130 is used to detect touch point (being shade) in the sensing region 114, and calculates the position of touch point.This optical touch control apparatus 100 has function of multi-spot touch.For instance, when two touch points were arranged in the sensing region 114, each image detecting element 132a, 132b, 132c should detect two dim spots respectively.In theory, can calculate the position (or claiming coordinate) of two touch points by any two dim spots that detected among these image detecting elements 132a, 132b, the 132c.Yet in some cases, one of them may only can detect a dim spot image detecting element 132a, 132b, 132c.
For instance, as shown in Figure 2, when two touch point A, B are arranged in the sensing region 114, image detecting element 132a can detect dim spot A1, B1, image detecting element 132b can detect dim spot A2, B2, and image detecting element 132c can detect dim spot A3, B3, and wherein dim spot A1, A2, A3 are that touch point A causes, and dim spot B1, B2, B3 are that touch point B causes.Yet, because of dim spot A1 and dim spot B1 overlapping, so image detecting element 132a only can detect a dim spot.So, when the algorithm that utilizes center of gravity calculates the position of dim spot A1 and dim spot B1, will produce error, that is produce so-called centre-of gravity shift.
Hold above-mentioned, when dim spot A1, the B1, A2, the B2 that utilize image detecting element 132a, 132b to be detected calculate the position of touch point A, B, can calculate the position of one of them touch point by straight line L1 and straight line L2, and calculate the position of another touch point by straight line L1 and straight line L3.But the problem of above-mentioned centre-of gravity shift may cause the position of two some A ', B ' calculating and the position of actual touch spots A, B that bigger error is arranged.Similarly, when dim spot A1, B1, A3, the B3 that utilizes image detecting element 132a, 132c to be detected calculates the position of touch point A, B, also can produce identical problem.
In addition, when dim spot A2, the B2, A3, the B3 that utilize image detecting element 132b, 132c to be detected calculate the position of touch point A, B, can utilize straight line L2 and straight line L5 to calculate the position of one of them touch point, and utilize straight line L3 and straight line L4 to calculate the position of another touch point.Yet straight line L2 is too close with straight line L5 slope, and the slope of straight line L3 and straight line L4 is too close, so may cause two some A that calculate ", B " the position and the position of actual touch spots A, B bigger error is arranged.
In addition, there is certain blind area (blind zone) in existing known optical touch control apparatus 100.Blind area herein is meant that image detecting element 132b, the 132c of image detecting module 130 can't detect the dim spot that touch point causes, thereby can't calculate the zone of the position of touch point.For instance, as shown in Figure 3, (field of view FOV) is contained reflecting strips 112a, 112d, but has the gap between reflecting strips 112a and the reflecting strips 112d so that image detecting element 132c to be set in the visual field of image detecting element 132b.Because image detecting element 132c can't reflection ray, cause image detecting element 132b can't detect touch point C in zone 150, so regional 150 are so-called blind area.In addition, when touch point D just part be positioned at the zone 150 the time, the dim spot that the touch point D that image detecting device 130b can't accurately detect is caused, the position that also can't accurately calculate touch point D like this.In addition, image detecting element 132c also has similar blind zone problem when detecting.
This shows that above-mentioned existing optical touch control apparatus obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.In order to solve the problem of above-mentioned existence, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, this obviously is the problem that the anxious desire of relevant dealer solves.Therefore how to found a kind of novel optical touch control apparatus and localization method thereof, real one of the current important research and development problem that belongs to, also becoming the current industry utmost point needs improved target.
Because the defective that above-mentioned existing optical touch control apparatus exists, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, and the utilization of cooperation scientific principle, actively studied innovation, in the hope of founding a kind of novel optical touch control apparatus and localization method thereof, can improve general existing optical touch control apparatus, make it have more practicality.Through constantly research, design, and, create the present invention who has practical value finally through after studying sample and improvement repeatedly.
Summary of the invention
Fundamental purpose of the present invention is, overcome the defective that existing optical touch control apparatus exists, and a kind of novel optical touch control apparatus and localization method thereof are provided, technical matters to be solved is to make it accurately calculate the position of touch point, and effectively solve the problem of blind area, be very suitable for practicality.
Another object of the present invention is to, a kind of localization method of novel optical touch control apparatus is provided, technical matters to be solved is to make its position of accurately calculating touch point, and effectively solves the problem of blind area, thereby is suitable for practicality more.
The object of the invention to solve the technical problems realizes by the following technical solutions.A kind of optical touch control apparatus according to the present invention's proposition, it is characterized in that it comprises: a framework, comprise a first wall, one second wall, one the 3rd wall and a wall, this first wall is relative with the 3rd wall, this second wall is relative with this wall, and the zone that this framework is enclosed is a sensing region; One light source module is in order to provide light to this sensing region; And one first image detecting element, be arranged between the adjacent both ends of this first wall and this second wall, and the 3rd wall and this wall are contained in the visual field of this first image detecting element; One second image detecting element is arranged between the adjacent both ends of this second wall and the 3rd wall, and this first wall and this wall are contained in the visual field of the 3rd image detecting element; One the 3rd image detecting element is arranged between the adjacent both ends of this first wall and this wall, and this second wall and the 3rd wall are contained in the visual field of the 3rd image detecting element; An and specular components, be arranged at this wall, wherein this specular components is suitable for making a touch point that is positioned at this sensing region to form a virtual image, and this first image detecting element and this second image detecting element are suitable for detecting the optical information of this touch point and this virtual image.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid optical touch control apparatus, wherein said light source module comprises: one first light-emitting component is arranged between the adjacent both ends of this first wall and this second wall; One second light-emitting component is arranged between the adjacent both ends of this second wall and the 3rd wall; And one the 3rd light-emitting component, be arranged between the adjacent both ends of this first wall and this wall.
Aforesaid optical touch control apparatus, this optical touch control apparatus more comprises: one first light-guide device is arranged at this first wall; One second light-guide device is arranged at this second wall; And one the 3rd light-guide device, be arranged at the 3rd wall.
Aforesaid optical touch control apparatus, wherein said first light-guide device, this second light-guide device and the 3rd light-guide device are respectively a reflecting strips, this first light-emitting component, this second light-emitting component and the 3rd light-emitting component are luminous towards this sensing region, and the light that first light-guide device, this second light-guide device and the 3rd light-guide device are used for being passed to this first light-guide device, this second light-guide device and the 3rd light-guide device reflexes to this sensing region.
Aforesaid optical touch control apparatus, wherein said first light-guide device, this second light-guide device and the 3rd light-guide device are respectively a leaded light bar, and have respectively towards an exiting surface of this sensing region and an incidence surface adjacent with this exiting surface, this first light-emitting component, this second light-emitting component and the 3rd light-emitting component are respectively towards this first light-guide device, those incidence surfaces of this second light-guide device and the 3rd light-guide device are luminous, and light is by this first light-guide device, those exiting surface outgoing of this second light-guide device and the 3rd light-guide device and be passed to this sensing region.
Aforesaid optical touch control apparatus, wherein said first light-emitting component, this second light-emitting component and the 3rd light-emitting component are respectively light emitting diode.
Aforesaid optical touch control apparatus, the wherein said first image detecting element, this second image detecting element and the 3rd image detecting element comprise a detecting unit respectively and are electrically connected to this detecting unit one numerical digit signal processing unit.
Aforesaid optical touch control apparatus, wherein said optical touch control apparatus more comprises a substrate, this framework, this light source module, this first image detecting element, this second image detecting element and the 3rd image detecting element are arranged at this substrate.
The object of the invention to solve the technical problems also realizes by the following technical solutions.The localization method of a kind of optical touch control apparatus that proposes according to the present invention, be applicable to the 1st described optical touch control apparatus of claim, the localization method of this optical touch control apparatus comprises: make a touch point that is positioned at this sensing region form a virtual image by this specular components; Utilize this first image detecting element, this second image detecting element and the 3rd image detecting element to detect the position of the dim spot that this touch point causes, obtaining one first optical information, and utilize this first image detecting element and this second image detecting element to detect the position of the dim spot that this virtual image causes to obtain one second optical information; And the position of judging this touch point that is positioned at this sensing region according to this first optical information and this second optical information.
The present invention compared with prior art has tangible advantage and beneficial effect.As known from the above, for achieving the above object, the invention provides a kind of optical touch control apparatus, it comprises a framework, a light source module, the first image detecting element, one second image detecting element, one the 3rd image detecting element and a specular components.Framework comprises a first wall, one second wall, one the 3rd wall and a wall.First wall is relative with the 3rd wall, and second wall is relative with wall, and the zone that framework is enclosed is a sensing region.The light source module is in order to provide light to sensing region.The first image detecting element is arranged between the adjacent both ends of the first wall and second wall, and the 3rd wall and wall are contained in the visual field.The second image detecting element is arranged between the adjacent both ends of second wall and the 3rd wall, and first wall and wall are contained in the visual field.The 3rd image detecting element is arranged between the adjacent both ends of first wall and wall, and second wall and the 3rd wall are contained in the visual field.Specular components is arranged at wall.Wherein, specular components is suitable for making a touch point that is positioned at sensing region to form a virtual image, and the first image detecting element and the second image detecting element are suitable for detecting the optical information of the touch point and the virtual image.
In one embodiment of this invention, above-mentioned light source module comprises one first light-emitting component, one second light-emitting component and one the 3rd light-emitting component.First light-emitting component is arranged between the adjacent both ends of the first wall and second wall.Second light-emitting component is arranged between the adjacent both ends of second wall and the 3rd wall.The 3rd light-emitting component is arranged between the adjacent both ends of first wall and wall.
In one embodiment of this invention, above-mentioned optical touch control apparatus more comprises one first light-guide device, one second light-guide device and one the 3rd light-guide device.Wherein, first light-guide device is arranged at first wall, and second light-guide device is arranged at second wall, and the 3rd light-guide device is arranged at the 3rd wall.
In one embodiment of this invention, the first above-mentioned light-guide device, second light-guide device and the 3rd light-guide device are respectively a reflecting strips, first light-emitting component, second light-emitting component and the 3rd light-emitting component are luminous towards sensing region, and the light that first light-guide device, second light-guide device and the 3rd light-guide device are used for being passed to first light-guide device, second light-guide device and the 3rd light-guide device reflexes to sensing region.
In one embodiment of this invention, the first above-mentioned light-guide device, second light-guide device and the 3rd light-guide device are respectively a leaded light bar, and have respectively towards an exiting surface of sensing region and an incidence surface adjacent with exiting surface, first light-emitting component, second light-emitting component and the 3rd light-emitting component are luminous towards the incidence surface of first light-guide device, second light-guide device and the 3rd light-guide device respectively, and light is passed to sensing region by the exiting surface outgoing of first light-guide device, second light-guide device and the 3rd light-guide device.
In one embodiment of this invention, above-mentioned first light-emitting component, second light-emitting component and the 3rd light-emitting component are respectively light emitting diode (light emitting diode).
In one embodiment of this invention, the above-mentioned first image detecting element, the second image detecting element and the 3rd image detecting element comprise a detecting unit and a numerical digit signal processing unit that is electrically connected to detecting unit respectively.
In one embodiment of this invention, above-mentioned optical touch control apparatus more comprises a substrate, and wherein framework, light source module, the first image detecting element, the second image detecting element and the 3rd image detecting element are arranged at substrate.
For reaching above-mentioned advantage, the present invention proposes a kind of localization method of optical touch control apparatus in addition, and it is applicable to above-mentioned optical touch control apparatus.The localization method of this optical touch control apparatus comprises: make a touch point that is positioned at sensing region form a virtual image by specular components; Utilize the position of the dim spot that the first image detecting element, the second image detecting element and the 3rd image detecting element detecting touch point causes, obtaining one first optical information, and the position that utilizes the dim spot that the first image detecting element and the second image detecting element detecting virtual image cause is to obtain one second optical information; And the position of judging the touch point that is positioned at sensing region according to first optical information and second optical information.
By technique scheme, optical touch control apparatus of the present invention and localization method thereof have following advantage and beneficial effect at least: the present invention is because the specular components of leaded light module can produce virtual image information, so the first image detecting element and the second image detecting element can detect more effective and available optical information, thereby can accurately calculate the touch point position, and effectively avoid the problem of blind area.
In sum, the invention relates to a kind of optical touch control apparatus and localization method thereof, wherein this optical touch control apparatus comprises framework, light source module and first, second, third image detecting element and specular components.Framework comprises first wall, second wall, the 3rd wall and wall, and first wall is relative with the 3rd wall, and second wall is relative with wall, and the zone that framework is enclosed is a sensing region.The light source module is in order to provide light to sensing region.First, second and third image detecting element is located between the adjacent both ends of the first wall and second wall respectively, between the adjacent both ends of second wall and the 3rd wall and between the adjacent both ends of first wall and wall.Specular components is arranged at wall.The present invention also proposes a kind of localization method of optical touch control apparatus.This optical touch control apparatus and localization method thereof can accurately obtain the touch point position, and effectively eliminate the blind area between the second and the 3rd image detecting element.The present invention has obvious improvement technically, and has tangible good effect, really is a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of instructions, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 is the structural representation of existing known a kind of optical touch control apparatus.
The overlapping synoptic diagram of dim spot that Fig. 2 is caused for two touch points in the sensing area of optical touch control apparatus shown in Figure 1.
Fig. 3 is the synoptic diagram of the blind area of optical touch control apparatus shown in Figure 1.
Fig. 4 is the structural representation of the optical touch control apparatus of one embodiment of the invention.
The overlapping synoptic diagram of dim spot that Fig. 5 is caused for two touch points in the sensing area of optical touch control apparatus shown in Figure 4.
Fig. 6 is the synoptic diagram that optical touch control apparatus shown in Figure 4 solves existing known techniques blind zone problem.
Fig. 7 is the structural representation of the optical touch control apparatus of another embodiment of the present invention.
100: existing known optical touch control apparatus
110: the leaded light module
112a, 112b, 112c, 112d: reflecting strips
114: sensing region
120: the light source module
122a, 122b, 122c: light-emitting component
130: the image detecting module
132a, 132b, 132c: image detecting element
150,250: the zone
200,200a: optical touch control apparatus
210: framework
201: first wall
202: the second walls
203: the three walls
204: the walls
212,212a: first light-guide device
214,214a: second light-guide device
216,216a: the 3rd light-guide device
218: specular components
219: sensing region
220: the light source module
222: the first light-emitting components
224: the second light-emitting components
226: the three light-emitting components
232: the first image detecting elements
234: the second image detecting elements
236: the three image detecting elements
237: detecting unit
238: the numerical digit signal processing unit
32: exiting surface
34: incidence surface
A, B, C, D, E, F, G, H: touch point
A ', A ", B ', B ": point
A1, A2, A3, B1, B2, B3, E2, E3, F2, F3, G2, G3, H2, H3: dim spot
E1, F1, G1, H1: the virtual image
L1, L2, L3, L4, L5: straight line
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, to optical touch control apparatus and its embodiment of localization method, structure, feature and the effect thereof that foundation the present invention proposes, describe in detail as after.
Relevant aforementioned and other technology contents, characteristics and effect of the present invention can clearly present in the following detailed description that cooperates with reference to graphic preferred embodiment.For convenience of description, in following embodiment, components identical is represented with identical numbering.
Fig. 4 is the structural representation of the optical touch control apparatus of one embodiment of the invention.Please refer to shown in Figure 4ly, the optical touch control apparatus 200 of present embodiment comprises a framework 210, a light source module 220, one first image detecting element 232, one second image detecting element 234, one the 3rd image detecting element 236 and a specular components 218.In the present embodiment, framework 210 for example is a rectangle framework, and it comprises a first wall 201, one second wall 202, one the 3rd wall 203 and a wall 204.First wall 201 is relative with the 3rd wall 203, and second wall 202 is relative with wall 204, and the zone that framework 210 first walls 201, second wall 202, the 3rd wall 203 and wall 204 are enclosed is a sensing region 219.Light source module 220 is in order to provide light to sensing region 219.Specular components 218 is arranged at the wall 204 of framework 210, and specular components 218 usefulness form a virtual image so that be positioned at a touch point of this sensing region, and the first image detecting element 232, the second image detecting element 234 and the 3rd image detecting element 236 are positioned at the touch point of sensing region 219 and the optical information of the corresponding virtual image in order to detecting.
In the present embodiment, optical touch control apparatus 200 more can comprise a substrate (figure does not show), and framework 210, light source module 220, the first image detecting element, the second image detecting element and the 3rd image detecting element can be arranged on the substrate.
In addition, in the present embodiment, optical touch control apparatus 200 more can comprise one first light-guide device 212, one second light-guide device 214, one the 3rd light-guide device 216.First light-guide device 212, second light-guide device 214 and the 3rd light-guide device 216 are arranged at first wall 201, second wall 202, the 3rd wall 203 of framework 210 respectively.First light-guide device 212, second light-guide device 214 and the 3rd light-guide device 216 for example are respectively a reflecting strips, and its light that is used for being passed to first light-guide device 212, second light-guide device 214 and the 3rd light-guide device 216 reflexes to sensing region 219.
Above-mentioned light source module 220 comprises one first light-emitting component 222, one second light-emitting component 224 and one the 3rd light-emitting component 226.First light-emitting component 222, second light-emitting component 224 and the 3rd light-emitting component 226 for example are respectively a light emitting diode, but not as limit.In the present embodiment, first light-emitting component 222 for example is to be arranged between the adjacent both ends of the first wall 201 of framework 210 and second wall 202 (promptly between the adjacent both ends of first light-guide device 212 and second light-guide device 214).Second light-emitting component 224 for example is to be arranged between the adjacent both ends of second wall 202 of framework 210 and the 3rd wall 203 (promptly between the adjacent both ends of second light-guide device 214 and the 3rd light-guide device 216).The 3rd light-emitting component 226 for example is to be arranged between the adjacent both ends of the first wall 201 of framework 210 and wall 204 (promptly between the adjacent both ends of first light-guide device 212 and specular components 218).In the present embodiment, first light-emitting component 212, second light-emitting component 214 and the 3rd light-emitting component 216 are luminous towards sensing region 219.
The above-mentioned first image detecting element 232 is arranged between the adjacent both ends of the first wall 201 of framework 210 and second wall 202 (promptly between the adjacent both ends of first light-guide device 212 and second light-guide device 214), and the 3rd wall 203 and the wall 204 (i.e. the 3rd light-guide device 216 and specular components 218) of framework 210 are contained in the visual field of the first image detecting element 232.The second image detecting element 234 is arranged between the adjacent both ends of second wall 202 of framework 210 and the 3rd wall 203 (promptly between the adjacent both ends of second light-guide device 214 and the 3rd light-guide device 216), and the first wall 201 and the wall 204 (i.e. first light-guide device 212 and specular components 218) of framework 210 are contained in the visual field of the second image detecting element 234.The 3rd image detecting element 236 is arranged between the adjacent both ends of the first wall 201 of framework 210 and wall 204 (promptly between the adjacent both ends of first light-guide device 212 and specular components 218), and second wall 202 and the 3rd wall 203 (i.e. second light-guide device 214 and the 3rd light-guide device 216) of framework 210 are contained in the visual field of the 3rd image detecting element 236.
In more detail, for example be provided with opening between the adjacent both ends of the first wall 201 and second wall 202, for first light-emitting component 222 and the first image detecting element 232 are set.For example be provided with opening between the adjacent both ends of second wall 202 and the 3rd wall 203, for second light-emitting component 224 and the second image detecting element 234 are set.For example be provided with opening between the adjacent both ends of first wall 201 and wall 204, for the 3rd light-emitting component 226 and the 3rd image detecting element 236 are set.
In addition, the first image detecting element 232, the second image detecting element 234 and the 3rd image detecting element 236 comprise a detecting unit 237 and a numerical digit signal processing unit 238 that is electrically connected to detecting unit 237 respectively.The visual field of the above-mentioned first image detecting element 232, the second image detecting element 234 and the 3rd image detecting element 236 is the visual field of detecting unit 237.In addition, numerical digit signal processing unit 238 is in order to handling the detection signal of corresponding detecting unit 237, and detection signal is passed to a CPU (central processing unit) (figure does not show), to calculate the position of touch point by this CPU (central processing unit).Above-mentioned detection signal for example is the position of the dim spot that detected of detecting unit 237.
Hereinafter specific descriptions are applicable to the localization method of the optical touch control apparatus of above-mentioned optical touch control apparatus 200, and will cooperate graphic optical touch control apparatus 200 and the localization method thereof of specifying how to avoid the dim spot that causes because of a plurality of touch point overlapping, cause locating coarse problem.
The localization method that is applicable to the optical touch control apparatus of above-mentioned optical touch control apparatus 200 may further comprise the steps:
Make a touch point that is positioned at sensing region 219 form a virtual image by specular components 218; Utilize the position of the dim spot that the first image detecting element 232, the second image detecting element 234 and the 3rd image detecting element 236 detecting touch points cause, to obtain one first optical information, and utilize the position of the dim spot that the first image detecting element 232 and the second image detecting element 234 detecting virtual images cause, to obtain one second optical information; And the position of judging the touch point that is positioned at sensing region 219 according to first optical information and second optical information.
Please refer to Fig. 5, the position of two touch point E, F that are positioned at sensing region 219 with the optical touch control apparatus 200 and the localization method thereof of present embodiment is an example.Because the setting of specular components 218, the touch point E, the F that are positioned at sensing region 219 will form virtual image E1, F1.So, the first image detecting element 232, the second image detecting element 234 and the 3rd image detecting element 236 can detect the dim spot that touch point E, F are caused, thereby obtain one first optical information.The first image detecting element 232 and the second image detecting element 234 can detect the dim spot that the virtual image E1, F1 are caused, thereby obtain one second optical information.That is to say that first optical information is about the optical information of touch point E, F, second optical information is about the optical information of virtual image E1, F1.
Hold above-mentioned, therein the dim spot E2 that is caused by touch point E, F that detected of an image detecting element (as the first image detecting element 232), when F2 is overlapping, the dim spot E3, the F3 that are caused by the virtual image E1, F1 that the first image detecting element 232 is detected is also underlapped.That is to say,, can detect the effectively second available optical information though the first image detecting element 232 can not detect the effectively first available optical information.So, the position (i.e. second optical information) of dim spot E3, the F3 that can be detected by the first image detecting element 232, the position (i.e. first optical information) of the dim spot that touch point E, the F that cooperates the second image detecting element 234 or the 3rd image detecting element 236 to be detected caused accurately calculates the position of touch point E, F.
In addition, the optical touch control apparatus 200 of present embodiment and localization method thereof also can solve the problem of the blind area that existing known techniques mentions.Please refer to Fig. 6, is example with the second image detecting element 234, because touch point G position is in zone 250 blind areas of known techniques (promptly existing), so the second image detecting element 234 can't detect the position of the dim spot that touch point G caused.In addition, because of a part of position of touch point H in zone 250, so the second image detecting element 234 can't accurately detect the position of the dim spot that touch point G caused.That is to say that the second image detecting element 234 can not detect the effectively first available optical information.Yet because of touch point G, H can form virtual image G1, H1, so the second image detecting element 234 can detect dim spot G2, the H2 that the virtual image G1, H1 are caused, and the first image detecting element 232 can detect dim spot G3, the H3 that the virtual image G1, H1 are caused.That is to say that the first image detecting element 232 and the second image detecting element 234 can detect the effectively second available optical information.So, the dim spot G3 that can be detected by the first image detecting element 232, the position of H3 cooperate the position of dim spot G2, H2 that the second image detecting element 234 detected accurately to calculate the position of touch point G, H.Simultaneously, also can cooperate the position (i.e. first optical information) of touch point G that the first image detecting element 232 or the 3rd image detecting element 236 detected, dim spot that H causes accurately to calculate the position of touch point G, H.Therefore, the optical touch control apparatus 200 of present embodiment and localization method thereof can effectively solve the problem of the blind area that existing known techniques mentions.
Based on above-mentioned, compared to existing known optical touch control apparatus 100, the optical touch control apparatus 200 and the localization method thereof of present embodiment, the first image detecting element 232 and the second image detecting element 234 can form the virtual image because of being provided with specular components 218 so that be positioned at the touch point of sensing region 219, so can detect the dim spot that the virtual image causes.That is to say that the first image detecting element 232 and the second image detecting element 234 can obtain more optical information, in order to the position that accurately calculates touch point.
Fig. 7 is the structural representation of the optical touch control apparatus of another embodiment of the present invention.Please refer to shown in Figure 7, the difference of the optical touch control apparatus 200a of present embodiment and above-mentioned optical touch control apparatus 200 is that the first light-guide device 212a of optical touch control apparatus 200a, the second light-guide device 213a and the 3rd light-guide device 214a are respectively a leaded light bar.Particularly, the first light-guide device 212a, the second light-guide device 214a and the 3rd light-guide device 216a have respectively towards exiting surface 32 of sensing region 219 and an incidence surface 34 adjacent with exiting surface 32.In the present embodiment, first light-emitting component 222, second light-emitting component 224 and the 3rd light-emitting component 226 are luminous towards the incidence surface 34 of the first light-guide device 212a, the second light-guide device 214a and the 3rd light-guide device 216a respectively.The light that light source module 220 is sent is by the incidence surface 34 incidents first light-guide device 212a, the second light-guide device 214a and the 3rd light-guide device 216a of the first light-guide device 212a, the second light-guide device 214a and the 3rd light-guide device 216a, and the first light-guide device 212a, the second light-guide device 214a and the 3rd light-guide device 216a can convert light to line source, and line source can be passed to sensing region 219 from exiting surface 32 outgoing.The touch point localization method of this optical touch control apparatus 200a and advantage are all identical with optical touch control apparatus 200, no longer repeat at this.
In sum, in optical touch control apparatus of the present invention and the localization method thereof, the first image detecting element and the second image detecting element can detect the virtual image of the touch point that is produced by specular components, to obtain more optical information, the problem that so helps accurately calculating the position of touch point and solve the blind area.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (9)
1. optical touch control apparatus is characterized in that it comprises:
One framework comprises a first wall, one second wall, one the 3rd wall and a wall, and this first wall is relative with the 3rd wall, and this second wall is relative with this wall, and the zone that this framework is enclosed is a sensing region;
One light source module is in order to provide light to this sensing region; And
One first image detecting element is arranged between the adjacent both ends of this first wall and this second wall, and the 3rd wall and this wall are contained in the visual field of this first image detecting element;
One second image detecting element is arranged between the adjacent both ends of this second wall and the 3rd wall, and this first wall and this wall are contained in the visual field of the 3rd image detecting element;
One the 3rd image detecting element is arranged between the adjacent both ends of this first wall and this wall, and this second wall and the 3rd wall are contained in the visual field of the 3rd image detecting element; And
One specular components is arranged at this wall, and wherein this specular components is suitable for making a touch point that is positioned at this sensing region to form a virtual image, and this first image detecting element and this second image detecting element are suitable for detecting the optical information of this touch point and this virtual image.
2. optical touch control apparatus according to claim 1 is characterized in that wherein said light source module comprises:
One first light-emitting component is arranged between the adjacent both ends of this first wall and this second wall;
One second light-emitting component is arranged between the adjacent both ends of this second wall and the 3rd wall; And
One the 3rd light-emitting component is arranged between the adjacent both ends of this first wall and this wall.
3. optical touch control apparatus according to claim 2 is characterized in that this optical touch control apparatus more comprises:
One first light-guide device is arranged at this first wall;
One second light-guide device is arranged at this second wall; And
One the 3rd light-guide device is arranged at the 3rd wall.
4. optical touch control apparatus according to claim 3, it is characterized in that wherein said first light-guide device, this second light-guide device and the 3rd light-guide device are respectively a reflecting strips, this first light-emitting component, this second light-emitting component and the 3rd light-emitting component are luminous towards this sensing region, and the light that first light-guide device, this second light-guide device and the 3rd light-guide device are used for being passed to this first light-guide device, this second light-guide device and the 3rd light-guide device reflexes to this sensing region.
5. optical touch control apparatus according to claim 3, it is characterized in that wherein said first light-guide device, this second light-guide device and the 3rd light-guide device are respectively a leaded light bar, and have respectively towards an exiting surface of this sensing region and an incidence surface adjacent with this exiting surface, this first light-emitting component, this second light-emitting component and the 3rd light-emitting component are respectively towards this first light-guide device, those incidence surfaces of this second light-guide device and the 3rd light-guide device are luminous, and light is by this first light-guide device, those exiting surface outgoing of this second light-guide device and the 3rd light-guide device and be passed to this sensing region.
6. optical touch control apparatus according to claim 2 is characterized in that wherein said first light-emitting component, this second light-emitting component and the 3rd light-emitting component are respectively light emitting diode.
7. optical touch control apparatus according to claim 1 is characterized in that the wherein said first image detecting element, this second image detecting element and the 3rd image detecting element comprise a detecting unit respectively and be electrically connected to this detecting unit one numerical digit signal processing unit.
8. optical touch control apparatus according to claim 1, it is characterized in that wherein said optical touch control apparatus more comprises a substrate, this framework, this light source module, this first image detecting element, this second image detecting element and the 3rd image detecting element are arranged at this substrate.
9. the localization method of an optical touch control apparatus is applicable to the 1st described optical touch control apparatus of claim, it is characterized in that the localization method of this optical touch control apparatus comprises:
Make a touch point that is positioned at this sensing region form a virtual image by this specular components;
Utilize this first image detecting element, this second image detecting element and the 3rd image detecting element to detect the position of the dim spot that this touch point causes, obtaining one first optical information, and utilize this first image detecting element and this second image detecting element to detect the position of the dim spot that this virtual image causes to obtain one second optical information; And
Judge the position of this touch point that is positioned at this sensing region according to this first optical information and this second optical information.
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| CN 200910261340 CN102103437B (en) | 2009-12-21 | 2009-12-21 | Optical touch device and positioning method thereof |
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| CN 200910261340 CN102103437B (en) | 2009-12-21 | 2009-12-21 | Optical touch device and positioning method thereof |
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| CN102103437B CN102103437B (en) | 2013-05-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102467296A (en) * | 2010-11-02 | 2012-05-23 | 原相科技股份有限公司 | Optical sensing system |
| CN102520830A (en) * | 2011-12-27 | 2012-06-27 | 华南理工大学 | Virtual touch screen system based on image processing technology |
| WO2013117100A1 (en) * | 2012-02-07 | 2013-08-15 | 北京京东方光电科技有限公司 | Method for determining position of touch point on touch panel, and touch panel |
| WO2022036992A1 (en) * | 2020-08-17 | 2022-02-24 | 安徽鸿程光电有限公司 | Capacitive touch-control module and control method therefor, and related device |
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| US20090090569A1 (en) * | 2005-10-13 | 2009-04-09 | Cho-Yi Lin | Sensing System |
| CN101582001A (en) * | 2009-07-07 | 2009-11-18 | 松翰科技股份有限公司 | Touch control screen, touch control module and control method |
| CN101581997A (en) * | 2008-05-12 | 2009-11-18 | 财团法人工业技术研究院 | Multipoint touch position tracking device, interactive system and interactive image processing method |
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| US20090090569A1 (en) * | 2005-10-13 | 2009-04-09 | Cho-Yi Lin | Sensing System |
| CN101581997A (en) * | 2008-05-12 | 2009-11-18 | 财团法人工业技术研究院 | Multipoint touch position tracking device, interactive system and interactive image processing method |
| CN101582001A (en) * | 2009-07-07 | 2009-11-18 | 松翰科技股份有限公司 | Touch control screen, touch control module and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102467296A (en) * | 2010-11-02 | 2012-05-23 | 原相科技股份有限公司 | Optical sensing system |
| CN102467296B (en) * | 2010-11-02 | 2014-11-05 | 原相科技股份有限公司 | Optical sensing system |
| CN102520830A (en) * | 2011-12-27 | 2012-06-27 | 华南理工大学 | Virtual touch screen system based on image processing technology |
| WO2013117100A1 (en) * | 2012-02-07 | 2013-08-15 | 北京京东方光电科技有限公司 | Method for determining position of touch point on touch panel, and touch panel |
| WO2022036992A1 (en) * | 2020-08-17 | 2022-02-24 | 安徽鸿程光电有限公司 | Capacitive touch-control module and control method therefor, and related device |
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| CN102103437B (en) | 2013-05-22 |
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