CN103092433B - Optical touch board and optical touch control apparatus - Google Patents
Optical touch board and optical touch control apparatus Download PDFInfo
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- CN103092433B CN103092433B CN201110351274.1A CN201110351274A CN103092433B CN 103092433 B CN103092433 B CN 103092433B CN 201110351274 A CN201110351274 A CN 201110351274A CN 103092433 B CN103092433 B CN 103092433B
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Abstract
The present invention relates to a kind of optical touch board, comprise a back up pad, a luminescence component, an optical fiber, an optical sensing module and a control unit. To bend, mode is distributed in back up pad optical fiber, and the light beam that luminescence component produces is received through optical fiber by optical sensing module. When optical fiber is touched by an object, produce a smooth echo in optical fiber and it is received by optical sensing module, make the conduction of velocity of time that control unit is received respectively according to light beam and light echo and light beam and obtain the contact position at object place.
Description
Technical field
The present invention relates to a kind of Trackpad and contactor control device, especially a kind of optical touch board and optical touch control apparatus.
Background technology
Generally speaking, contactor control device comprises luminous module and Trackpad, luminous module is luminescence component and light guiding plate, Trackpad then can be divided into capacitive touch control plate, resistor type touch control plate and optical touch board, relative to capacitive touch control plate and resistor type touch control plate, optical touch board with low cost and there is the advantage of economic benefits.
Referring to Fig. 1, it is the structural representation of existing optical touch board. existing optical touch board 10 comprises a contact plate 101, multiple first luminescence component 102, multiple 2nd luminescence component 103, multiple first optical sensing module 104, multiple 2nd optical sensing module 105,1 first circuit card 106, the 2nd circuit card 107, the 3rd circuit card 108 and one the 4th circuit card 109,1 first control unit 110 and one the 2nd control unit 111. contact plate 101 is in order to be contacted by the finger of user or pointer, multiple first luminescence component 102 is in order to produce multiple first light beam B1, and multiple first light beam B1 system advances along horizontal direction and passes through above contact plate 101, and multiple 2nd luminescence component 101 is in order to produce multiple first light beam B2, and multiple 2nd light beam B2 system vertically advances and passes through above contact plate 101, wherein multiple first luminescence component 102 and multiple 2nd luminescence component 103 are infrared light emission source, and first light beam B1 and the 2nd light beam B2 then do not seen by user for infrared rays.
In Fig. 1, first circuit card 106 is arranged at the left side of contact plate 101, in order to arrange multiple first luminescence component 102 thereon, and the 3rd circuit card 108 be arranged at contact plate 101 right side, in order to arrange multiple first optical sensing module 104 and the first control unit 110 thereon, wherein each first luminescence component 102 is corresponding to first optical sensing module 104, and the first control unit 110 is connected to multiple first optical sensing module 104. 2nd circuit card 107 is arranged at the upper side of contact plate 101, in order to arrange multiple 2nd luminescence component 103 thereon, and the 4th circuit card 109 be arranged at contact plate 101 lower side, in order to arrange multiple 2nd optical sensing module 105 and the 2nd control unit 111 thereon, wherein each 2nd luminescence component 103 is corresponding to the 2nd optical sensing module 105, and the 2nd control unit 111 is connected to multiple 2nd optical sensing module 105.
Multiple first optical sensing module 104 is in order to receive the multiple first light beam B1 from multiple first luminescence component 102, and by luminous energy, the first light beam B1 received is converted to electric signal, and exports corresponding electric signal and give the first control unit 110. With reason, multiple 2nd optical sensing module 105 is in order to receive the multiple 2nd light beam B2 from multiple 2nd luminescence component 103, and by luminous energy, the 2nd light beam B2 received is converted to electric signal, and exports corresponding electric signal and give the 2nd control unit 111.
When existing optical touch board 10 operate and contact plate 101 not touched time, multiple first luminescence component 102 produces multiple first light beam B1 and multiple first light beam B1 is received by corresponding multiple first optical sensing modules 104 by contacting the top of plate 101 so that multiple first optical sensing module 104 exports the electric signal corresponding to the first light beam B1 and gives the first control unit 110. On the other hand, multiple 2nd luminescence component 103 produces multiple 2nd light beam B2 and multiple 2nd light beam B2 is received by corresponding multiple 2nd optical sensing modules 105 by contacting the top of plate 101 so that multiple 2nd optical sensing module 105 exports the electric signal corresponding to the 2nd light beam B2 and gives the 2nd control unit 111.
Next referring to Fig. 2, it is the touched structural representation of existing optical touch board.
And when existing optical touch board 10 operates and contacts plate 101 certain a bit touched by the finger F of user time, the first light beam B1 that the 3rd the first luminescence component 102 in multiple first luminescence component 102 produces is by the fingers blocks of user, its first light beam B1 cannot be received by the first corresponding optical sensing module 104, and except the first light beam B1 that the 3rd the first luminescence component 102 produces, remaining first light beam B1 is all received by the first optical sensing module 104 corresponding thereto, and first optical sensing module 104 transmit corresponding electric signal and give the first control unit 110, therefore the first control unit 110 can learn according to the first optical sensing module 104 of non-output electric signal which horizontal position is equipped with object and exists and stop the traveling of the first light beam B1.
With reason, the 2nd light beam B2 that the 5th the 2nd luminescence component 103 in multiple 2nd luminescence component 103 produces is by the fingers blocks of user, its the 2nd light beam B2 cannot be received by the 2nd corresponding optical sensing module 105, and except the 2nd light beam B2 that the 5th the 2nd luminescence component 103 produces, remaining the 2nd light beam B2 is all received by the 2nd optical sensing module 105 corresponding thereto, and the 2nd optical sensing module 105 transmit corresponding electric signal and give the 2nd control unit 111, therefore the 2nd control unit 111 can learn according to the 2nd optical sensing module 105 of non-output electric signal which vertical position has object to exist and stop the traveling of the 2nd light beam B2. by above-mentioned running, the first control unit 110 and the 2nd control unit 111 can obtain the position of the finger of user, and export the trigger signals corresponding to its position. the operation situation of existing optical touch board is described above.
But, existing optical touch board 10 must arrange the position that the first a large amount of luminescence component 102, first luminescence components 103 and the first optical sensing module 104 corresponding thereto and the 2nd optical sensing module 105 are just detected the finger of user so that existing optical touch board 1 needs higher cost inevitablely.With reason, the optical touch control apparatus with existing optical touch board also has same problem. The optical touch board reduced costs consequently, it is desirable to a kind of and optical touch control apparatus.
Summary of the invention
The object of the present invention is in a kind of optical touch board reduced costs of offer.
Another object of the present invention is at a kind of optical touch control apparatus reduced costs of offer.
In a better embodiment, the present invention provides a kind of optical touch board, comprising:
One back up pad;
One luminescence component, in order to produce a light beam;
One optical fiber, is distributed in this back up pad to bend mode, and a first end of this optical fiber makes this light beam export through this optical fiber from the 1 of this optical fiber the 2nd end in order to receive this light beam, and produces a smooth echo in this optical fiber when this optical fiber is touched by an object;
One optical sensing module, is arranged at the 2nd end place close to this optical fiber, is exported the first signal corresponding to this light beam by this light beam of this optical fiber in order to receive and exports in order to receive this light echo should the 2nd signal of light echo; And
One control unit, is connected to this optical sensing module, in order to judge the contact position that this optical fiber is touched by this object according to this first signal and the 2nd signal, and exports the trigger signals corresponding to this object.
In a better embodiment, this optical fiber comprises multiple linear section and multiple bending section, and each bent area section is positioned between every two linear section, and the plurality of linear section is parallel to each other.
In a better embodiment, this back up pad has groove, is arranged at the upper surface of this back up pad, in order to arrange this optical fiber in wherein, and the external form that the shape of this groove forms continuous S type corresponding to this optical fiber being bent.
In a better embodiment, optical touch board of the present invention more comprises:
One first circuit card, thereon and provides electric power to give this luminescence component in order to arrange this luminescence component; And
One the 2nd circuit card, thereon and provides electric power to give this optical sensing module in order to arrange this optical sensing module.
In a better embodiment, this control unit obtains a triggering distance d according to receiving a conduction of velocity Vf in this optical fiber of the very first time t1 of this first signal, the 2nd time t2 receiving the 2nd signal and this light beam, and obtains this contact position according to the total length of this triggering distance and this optical fiber; Wherein d=(Vf �� (t2-t1))/2.
In a better embodiment, this control unit is preset with a location database, in order to store multiple back up pad coordinate, and when this control unit obtains this triggering distance, this control unit obtains this contact position by searching in this location database corresponding to this back up pad coordinate of this triggering distance.
In a better embodiment, when multiple contact positions of this optical fiber are touched by this object, this control unit triggers distance according to corresponding to the multiple of the plurality of contact position and obtain the multiple back up pad coordinates corresponding to the plurality of triggering distance, and the plurality of back up pad coordinate is averaged and calculates and obtain a central contact position of the plurality of contact position by this control unit, and export this trigger signals corresponding to this central contact position.
In a better embodiment, this light echo is advanced from this contact position of this object toward this first end of this optical fiber, and this light echo by this first end reflection of this optical fiber and marches to the 2nd end of this optical fiber by this first end of this optical fiber and received by this optical sensing module.
In a better embodiment, this optical fiber comprises:
One fiber optic core, in order to transmit this light beam and this light echo; And
One fiber outer layer, is coated on this fiber optic core, with so that this light beam and this light echo are totally reflected in this fiber optic core.
In a better embodiment, the present invention also provides a kind of optical touch control apparatus, comprising:
One optical touch board, comprising:
One back up pad;
One luminescence component, in order to produce one first light beam;
One optical fiber, it is distributed in this back up pad to bend mode, the first end of this optical fiber makes this first light beam export through this optical fiber from the 1 of this optical fiber the 2nd end in order to receive this first light beam, and produces light echo in this optical fiber when this optical fiber is touched by an object;
One optical sensing module, is arranged at the 2nd end place close to this optical fiber, is exported the first signal corresponding to this first light beam in order to receive by this first light beam of this optical fiber and is exported the 2nd signal corresponding to this light echo in order to receive this light echo;
One control unit, is connected to this optical sensing module, in order to judge the contact position that this optical fiber is touched by this object according to this first signal and the 2nd signal, and exports the trigger signals corresponding to this object;
One another luminescence component, is positioned at one first side of this luminescence component, in order to produce one the 2nd light beam; And
One light guiding plate, is arranged at the lower section of this back up pad, makes this optical touch control apparatus luminous in order to guide the 2nd light beam.
In a better embodiment, this optical fiber comprises multiple linear section and multiple bending section, and each bent area section is positioned between every two linear section, and the plurality of linear section is parallel to each other.
In a better embodiment, this back up pad has groove, is arranged at the upper surface of this back up pad, and in order to arrange this optical fiber in wherein, and the shape system of this groove forms the external form of continuous S type corresponding to this optical fiber of bending.
In a better embodiment, optical touch control apparatus of the present invention more comprises:
One first circuit card, thereon and provides electric power to give this luminescence component and this another luminescence component in order to arrange this luminescence component and this another luminescence component; And
One the 2nd circuit card, thereon and provides electric power to give this optical sensing module in order to arrange this optical sensing module.
In a better embodiment, this control unit obtains a triggering distance d according to a conduction of velocity Vf in this optical fiber of the very first time t1 receiving this first signal, one the 2nd time t2 receiving the 2nd signal and this first light beam, and obtains this contact position according to the total length of this triggering distance and this optical fiber; Wherein d=(Vf �� (t2-t1))/2.
In a better embodiment, this control unit is preset with a location database, in order to store multiple back up pad coordinate, and when this control unit obtains this triggering distance, obtain this contact position by this location database is searched corresponding to this back up pad coordinate of this triggering distance.
In a better embodiment, when multiple contact positions of this optical fiber are touched by this object, this control unit triggers distance according to corresponding to the multiple of the plurality of contact position and obtain the multiple back up pad coordinates corresponding to the plurality of triggering distance, and the plurality of back up pad coordinate is averaged and calculates and obtain a central contact position of the plurality of contact position by this control unit, and export this trigger signals corresponding to this central contact position.
In a better embodiment, this light echo is advanced from this position of this object toward this first end of this optical fiber, and this light echo by this first end reflection of this optical fiber and marches to the 2nd end of this optical fiber by this first end of this optical fiber and received by this optical sensing module.
In a better embodiment, this optical fiber comprises:
One fiber optic core, in order to transmit this first light beam and this light echo; And
One fiber outer layer, is coated on this fiber optic core, with so that this first light beam and this light echo are totally reflected in this fiber optic core.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing optical touch board.
Fig. 2 is the touched structural representation of existing optical touch board.
Fig. 3 is the structural representation of optical touch board of the present invention in the first better embodiment.
Fig. 4 is the structure schematic side view of optical touch board of the present invention in the first better embodiment.
Fig. 5 is the local structure schematic side view that refraction does not occur in the first better embodiment for the optical fiber of optical touch board of the present invention.
Fig. 6 is the structure schematic side view that total reflection occurs in the first better embodiment for the optical fiber of optical touch board of the present invention.
Fig. 7 is optical fiber touched structure schematic side view producing light echo in the first better embodiment of optical touch board of the present invention.
Fig. 8 is optical touch board of the present invention in the schematic diagram of the corresponding coordinate plane of the first better embodiment.
Fig. 9 is the structure schematic side view of optical touch control apparatus of the present invention in the 2nd better embodiment.
Figure 10 is the structural representation of optical touch control apparatus of the present invention in the 2nd better embodiment.
Figure 11 is the structural representation of optical touch board of the present invention in the 3rd better embodiment.
Wherein, description of reference numerals is as follows:
2 optical touch control apparatus 10,20,30 optical touch board
21 another luminescence component 22 light guiding plates
23 protective layers 101 contact plate
102 first luminescence component 103 the 2nd luminescence components
104 first optical sensing module 105 the 2nd optical sensing modules
106,206 first circuit card 107,207 the 2nd circuit card
108 the 3rd circuit card 109 the 4th circuit cards
110 first control unit 111 the 2nd control units
201,301 back up pad 202,302 luminescence component
203,303 optical fiber 204,304 optical sensing module
205 control unit 231 barrier assemblies
The upper surface of 2011 groove 2012 back up pads
First side 2031 linear section of 2013 back up pads
The first end of 2032 bending section 2033 optical fiber
2nd end 2035 fiber optic core of 2034 optical fiber
2036 fiber outer layer 2033A enter region
2033B reflector space B light beam
D triggers distance F object
The total length R light echo of L optical fiber
B1, B1* first light beam B2, B2* the 2nd light beam
The medium refraction index of the medium refraction index n2 air of n1 glass
The medium refraction index Pt of n3 object contacts position
S1 first signal S2 the 2nd signal
�� 1 input angle �� 2 refraction angle
X-Y coordinate plane
Embodiment
In view of the defect of prior art, the present invention provides a kind of input unit with multilayer luminous pattern. It is the structural representation of optical touch board of the present invention in the first better embodiment please refer to Fig. 3 and Fig. 4, Fig. 3, and Fig. 4 is the structure schematic side view of optical touch board in the first better embodiment. Optical touch board 20 comprises back up pad 201, luminescence component 202, optical fiber 203, one optical sensing module 204, control unit 205,1 first circuit card 206 and one the 2nd circuit card 207. Back up pad 201 has groove 2011, it is arranged at the upper surface 2022 of back up pad 201, and optical fiber 203 lies in and is distributed in back up pad 201 in a bending mode in horizontal direction, optical fiber 203 comprises multiple linear section 2031 and multiple bending section 2032, and each bending section 2032 is between every two linear section 2031, the plurality of linear section 2031 is parallel to each other, makes optical fiber 203 form the external form of continuous S type, as shown in Figure 3.In this better embodiment, optical fiber 203 is be arranged at bendingly in groove 2011, and the external form that the shape system of groove 2011 forms continuous S type corresponding to the optical fiber 203 being bent. Specifically, the optical fiber 203 in Fig. 4 is with form of straight lines display so that illustrating, in fact the distribution mode of optical fiber 203 is as shown in Figure 3.
First circuit card 206 is the first side 2013 being arranged at back up pad 201, in order to arrange, luminescence component 202 provides electric power to give luminescence component 202 thereon for it, and luminescence component 202 is in order to produce a light beam B, light beam B is entered in optical fiber 203 by the first end 2033 of optical fiber 203. 2nd circuit card 207 is arranged at the 2nd side 2014 of back up pad 201, in order to arrange, optical sensing module 204 thereon and provides electric power to give optical sensing module 204 for it, optical sensing module 204 is arranged at and is received the light beam B by optical fiber 203 close to the 2nd end 2034 place of optical fiber 203. Control unit 205 is also arranged on the 2nd circuit card 207 and is connected to optical sensing module 204, certainly, is also provided by the 2nd circuit card 207 in order to the electric power of driving control unit 205. In this better embodiment, first side 2013 of back up pad 201 is on the left of it, 2nd side 2014 of back up pad 201 is then on the right side of it, luminescence component 202 is photodiode, and optical sensing module 204 is Charged Coupled Device (Charge-CoupledDevice, or complementary metal oxide semi-conductor (ComplementaryMetal-OxideSemiconductor, CMOS), CCD) and control unit 205 is microprocessor.
In Fig. 4, optical fiber 203 more comprises fiber optic core 2035 and a fiber outer layer 2036, fiber optic core 2035 is in order to transmitting beam B, and fiber outer layer 2036 is coated on fiber optic core 2036, with so that light beam B is totally reflected in fiber optic core 2035, wherein light beam B system is entered in its fiber optic core 2035 by the first end 2033 of optical fiber 203, and light beam B its advance toward the 2nd end 2034 of optical fiber 203. On the first end 2033 of optical fiber 203, it is provided with one and enters region 2033A and two reflector space 2033B, enters region 2033A between this two reflector space 2033B, enters in fiber optic core 2035 with for the light beam B from luminescence component 202.
Next illustrating that light beam B carries out the principle being totally reflected in optical fiber 203, light beam B carries out being totally reflected the situation being light beam B and not occurring to reflect. Referring to Fig. 5, it is the local structure schematic side view that refraction does not occur in the first better embodiment for the optical fiber of optical touch board of the present invention. In this better embodiment, optical fiber 203 is with made by glass, and the medium refraction index n1 of glass is about 1.5, and optical fiber 203 is be arranged in air to be operated, and the medium refraction index n2 of air is 1. When light beam B advances in optical fiber 203, the refraction angle �� 2 (also known as critical angle) of its light beam B is 90 degree is the criticality of refraction of light and light total reflection, and according to taking charge of law (Snell ' sLaw) like this:
N1 �� sin �� 1=n2 �� sin �� 2
And can calculate and learn that the input angle �� 1 of light beam B is about 41.8 degree. Therefore it will be seen that when the input angle �� 1 of light beam B is between 41.8 degree to 90 degree, light beam B can be totally reflected. Based on the phenomenon of above-mentioned light total reflection, light beam B in one launch time t0 produced and enter optical fiber 203 by the first end 2033 of optical fiber 203 by luminescence component 202, following light beam B is output through optical fiber 203 by the 2nd end 2034 of optical fiber 203, and received by optical sensing module 204, as shown in Figure 6.Optical sensing module 204 exports the first signal S1 corresponding to light beam B give control unit 205 in response to light beam B, making control unit 205 receive this first signal S1 in very first time t1, wherein the luminous energy of light beam B is converted to the electric signal of electric energy by the first signal S1 system optical sensing module 204.
Referring to Fig. 7, its optical fiber being optical touch board of the present invention is touched and produce the structure schematic side view of light echo in the first better embodiment. when light beam B advances in optical fiber 203 and an object F touches optical fiber 203, owing to the medium refraction index n3 (being about 1.4) of object F is different from the medium refraction index n2 of air, cause the conversion of medium refraction index, part light beam B is made to continue to advance toward the 2nd end 2034 of optical fiber 203, and this segment beam B is subject to the impact of object F and is received by optical sensing module 204 in the time being slightly later to very first time t1, the time that wherein this segment beam B is received is quite close to very first time t1, therefore the time that its time postponed can be ignored and be received using very first time t1 as this segment beam B. the light beam B of another part then produces a smooth echo R in response to the touching of object F, the contact position Pt that wherein light echo R is touched from optical fiber 203 by object F advances toward the first end 2033 of optical fiber 203, and as the reflector space 2033B that light echo R is projected on its first end 2033, light echo R is reflected by reflector space 2033B and makes it advance toward the 2nd end 2034 of optical fiber 203, and light echo R is output and received by optical sensing module 204 by the 2nd end 2034 of optical fiber 203 equally. optical sensing module 204 exports the 2nd signal S2 corresponding to light echo R give control unit 205 in response to light echo R, making control unit 205 receive the 2nd signal S2 in one the 2nd time t2, wherein the luminous energy of light echo R is converted to the electric signal of electric energy by the 2nd signal S2 system optical sensing module 204. in this better embodiment, object F is the finger of user.
Therefore, control unit 205 can obtain a triggering distance d according to receiving a conduction of velocity Vf in optical fiber 203 of the very first time t1 of the first signal S1, the 2nd time t2 receiving the 2nd signal S2 and light beam B, and contact position Pt is obtained according to the total length L of this triggering distance d and optical fiber 203, wherein
D=(Vf �� (t2-t1))/2, and Vf=light velocity C �� n1
In this better embodiment, the total length L of optical fiber 203 is 100 centimeters, and conduction of velocity Vf system is with light velocity C (3 �� 108Meter/second) the medium refraction index n1 (that is 1.5) of �� glass and equal 2 �� 108Meter/second. And launch time, t0 was 0 second, very first time t1 was 5 how seconds (nanoseconds), and the 2nd time t2 was 10 how seconds. Calculating can obtain and trigger distance d is 50 centimeters, and by the total length L of optical fiber 203 it will be seen that its contact position Pt system is positioned at the central position of optical fiber 203.
Next referring to Fig. 8, it is optical touch board of the present invention in the schematic diagram of the corresponding coordinate plane of the first better embodiment. Fig. 8 shows the coordinate plane X-Y that corresponds to optical touch board 20, and coordinate plane X-Y comprises multiple back up pad coordinate, and wherein each back up pad coordinate is corresponding to a position of the optical fiber 203 in back up pad 201. Illustrate, please refer to Fig. 2 and Fig. 8, the first end 2033 of the optical fiber 203 in Fig. 2 (that is be set to contact position be the place of 0) is the back up pad coordinate (0 corresponding to Fig. 8,0), and back up pad coordinate (0,0) position (that is be set to contact position be 3 millimeters of parts) toward a right coordinate scale is back up pad coordinate (1,0), analogize with this, and the coordinate corresponding to its contact position Pt is back up pad coordinate (10,9), wherein the scale of each back up pad coordinate is about 3 millimeters.Above-mentioned multiple back up pad system of coordinates is stored in the location database 2051 (please refer to Fig. 2) in control unit 205 in advance, when control unit 205 calculates and obtains triggering distance d (that is 50 centimeters), control unit 205 is by searching corresponding to the back up pad coordinate (10 triggering distance d in location database 2051,9) contact position Pt is obtained, make control unit 205 be exported the trigger signals corresponding to contact position Pt (or corresponding to object F), perform corresponding instruction by this.
Specifically be the situation that multiple contact positions of optical fiber 203 are triggered. When object F (that is finger of user) touches optical touch board 20, and multiple contact positions of its optical fiber 203 are when being touched by object F, control unit 205 is calculated by above-mentioned computation process and obtains the multiple triggering distances corresponding to multiple contact position, and searches the multiple back up pad coordinates corresponding to multiple triggering distance in location database 2051. Finally, multiple back up pad coordinate is averaged and calculates and obtain a central contact position of multiple contact position by control unit 205, and exports the trigger signals corresponding to this central contact position.
In addition, the present invention more provides one the 2nd better embodiment. It is the structure schematic side view of optical touch control apparatus of the present invention in the 2nd better embodiment please refer to Fig. 9 and Figure 10, Fig. 9, and Figure 10 is the structural representation of optical touch control apparatus of the present invention in the 2nd better embodiment. Optical touch control apparatus 2 comprises the optical touch board 20, in the first better embodiment another luminescence component 21, one light guiding plate 22 and a protective layer 23; the structure of optical touch board 20, principle of operation and operation situation are described above; therefore repeat no more; need it is emphasized that, the luminescence component 202 of optical touch board 20 is produce one first light beam B1*.
Another luminescence component 21 be arranged at back up pad 201 the first side 2011 and adjacent to luminescence component 202, in order to produce one the 2nd light beam B2*, and light guiding plate 22 is arranged at the lower section of back up pad 201 of optical touch board 20, make optical touch control apparatus 2 luminous in order to guide the 2nd light beam B2. Protective layer 23 is the top being arranged at optical touch board 20, avoids optical touch board 20 directly and other object contact in order to protect optical touch board 20. Protective layer 23 comprises multiple barrier assembly 231; it is arranged at the bottom of protective layer 23; when barrier assembly 231 is arranged in the back up pad 301 of optical touch board 20 not have optical fiber 203 part, barrier assembly 231 can be isolated protective layer 23 and optical touch board 20 and be avoided optical touch board 20 to be triggered. When protective layer 23 is touched by object, protective layer 23 is touched and produces deformation, makes protective layer 23 stretch out in barrier assembly 231 and trigger the optical touch board 20 being positioned at below it, to produce corresponding trigger signals. In this better embodiment, barrier assembly 231 is be printed in the bottom of protective layer 23 with ultraviolet curing ink (that is UV ink) and formed.
Embodiment better for first is identical, and luminescence component 202 is be arranged on the first circuit card 206, and another luminescence component 21 is also arranged on the first circuit card 206, and the first circuit card 206 also provides electric power to give another luminescence component 21. In this better embodiment, another luminescence component 21 is photodiode. Comprehensive speech, another luminescence component 21 and light guiding plate 22 are provide optical touch control apparatus 2 one lighting function.
In first better embodiment and the 2nd better embodiment, luminescence component 202 is the left side being arranged at back up pad 201, and optical sensing module 204 right sides being arranged at back up pad 201, and optical fiber 203 is bend mode with level to be distributed in back up pad 201, but not as limit.For optical touch board 30 explanation of the 3rd better embodiment of the present invention, the luminescence component 302 of optical touch board 30 can be arranged at the upper side of back up pad 301, and optical sensing module 304 lower side being arranged at back up pad 301, optical fiber 303 then can vertically bend mode and be distributed in back up pad 301, as shown in figure 11.
According to above-mentioned known, optical touch board of the present invention and optical touch control apparatus system utilize the light beam in optical fiber and light echo and judge the position that is triggered, to export corresponding trigger signals, and optical touch board only need to arrange a luminescence component in the place of the first end close to optical fiber, and in arranging an optical sensing module close to the 2nd end place of optical fiber, its optical touch board can operate. compared with prior art, existing optical touch board must arrange multiple luminescence component and optical sensing module corresponding thereto, and optical touch board of the present invention only needs to arrange a luminescence component and an optical sensing module, significantly, optical touch board of the present invention and optical touch control apparatus can save considerable cost, also can save and multiple luminescence component and the space of multiple optical sensing module must be set originally, that is, optical touch board of the present invention and optical touch control apparatus not only have the advantage on cost, more can reduce its volume and implement volume lightening.
The foregoing is only the better embodiment of the present invention, it does not mean to limit the present invention claim, therefore all other do not depart from disclosed spirit under complete equivalence change or modify, all should be contained in the claim of this case.
Claims (16)
1. an optical touch board, comprising:
One back up pad;
One luminescence component, in order to produce a light beam;
One optical fiber, is distributed in this back up pad to bend mode, and a first end of this optical fiber makes this light beam export through this optical fiber from the 1 of this optical fiber the 2nd end in order to receive this light beam, and produces light echo in this optical fiber when this optical fiber is touched by an object;
One optical sensing module, is arranged at the 2nd end place close to this optical fiber, is exported the first signal corresponding to this light beam by this light beam of this optical fiber in order to receive and exports in order to receive this light echo should the 2nd signal of light echo; And
One control unit, it is connected to this optical sensing module, in order to judge the contact position that this optical fiber is touched by this object according to this first signal and the 2nd signal, and export the trigger signals corresponding to this object, wherein this control unit obtains a triggering distance d according to a conduction of velocity Vf in this optical fiber of the very first time t1 receiving this first signal, one the 2nd time t2 receiving the 2nd signal and this light beam, and obtains this contact position according to the total length of this triggering distance and this optical fiber; Wherein d=(Vf �� (t2-t1))/2.
2. optical touch board as claimed in claim 1, wherein this optical fiber comprises multiple linear section and multiple bending section, and each bent area section is positioned between every two linear section, and the plurality of linear section is parallel to each other.
3. optical touch board as claimed in claim 1, wherein this back up pad has groove, is arranged at the upper surface of this back up pad, in order to arrange this optical fiber in wherein, and the external form that the shape system of this groove forms continuous S type corresponding to this optical fiber being bent.
4. optical touch board as claimed in claim 1, more comprises:
One first circuit card, thereon and provides electric power to give this luminescence component in order to arrange this luminescence component;And
One the 2nd circuit card, thereon and provides electric power to give this optical sensing module in order to arrange this optical sensing module.
5. optical touch board as claimed in claim 1, wherein this control unit is preset with a location database, in order to store multiple back up pad coordinate, and when this control unit obtains this triggering distance, this control unit obtains this contact position by searching in this location database corresponding to this back up pad coordinate of this triggering distance.
6. optical touch board as claimed in claim 5, wherein when multiple contact positions of this optical fiber are touched by this object, this control unit triggers distance according to corresponding to the multiple of the plurality of contact position and obtain the multiple back up pad coordinates corresponding to the plurality of triggering distance, and the plurality of back up pad coordinate is averaged and calculates and obtain a central contact position of the plurality of contact position by this control unit, and export this trigger signals corresponding to this central contact position.
7. optical touch board as claimed in claim 1, wherein this light echo is advanced from this contact position of this object toward this first end of this optical fiber, and this light echo by this first end reflection of this optical fiber and marches to the 2nd end of this optical fiber by this first end of this optical fiber and received by this optical sensing module.
8. optical touch board as claimed in claim 1, wherein this optical fiber comprises:
One fiber optic core, in order to transmit this light beam and this light echo; And
One fiber outer layer, is coated on this fiber optic core, with so that this light beam and this light echo are totally reflected in this fiber optic core.
9. an optical touch control apparatus, comprising:
One optical touch board, comprising:
One back up pad;
One luminescence component, in order to produce one first light beam;
One optical fiber, is distributed in this back up pad to bend mode, and the first end of this optical fiber makes this first light beam export through this optical fiber from the 2nd end of this optical fiber in order to receive this first light beam, and produces light echo in this optical fiber when this optical fiber is touched by an object;
One optical sensing module, is arranged at the 2nd end place close to this optical fiber, is exported the first signal corresponding to this first light beam in order to receive by this first light beam of this optical fiber and is exported the 2nd signal corresponding to this light echo in order to receive this light echo;
One control unit, is connected to this optical sensing module, in order to judge the contact position that this optical fiber is touched by this object according to this first signal and the 2nd signal, and exports the trigger signals corresponding to this object; Wherein this control unit obtains a triggering distance d according to receiving a conduction of velocity Vf in this optical fiber of the very first time t1 of this first signal, the 2nd time t2 receiving the 2nd signal and this first light beam, and obtains this contact position according to the total length of this triggering distance and this optical fiber; Wherein d=(Vf �� (t2-t1))/2;
One another luminescence component, is positioned at one first side of this luminescence component, in order to produce one the 2nd light beam; And
One light guiding plate, is arranged at the lower section of this back up pad, makes this optical touch control apparatus luminous in order to guide the 2nd light beam.
10. optical touch control apparatus as claimed in claim 9, wherein this optical fiber comprises multiple linear section and multiple bending section, and each bent area section is positioned between every two linear section, and the plurality of linear section is parallel to each other.
11. optical touch control apparatus as claimed in claim 9, wherein this back up pad has groove, is arranged at the upper surface of this back up pad, and in order to arrange this optical fiber in wherein, and the shape system of this groove forms the external form of continuous S type corresponding to this optical fiber of bending.
12. optical touch control apparatus as claimed in claim 9, more comprise:
One first circuit card, thereon and provides electric power to give this luminescence component and this another luminescence component in order to arrange this luminescence component and this another luminescence component; And
One the 2nd circuit card, thereon and provides electric power to give this optical sensing module in order to arrange this optical sensing module.
13. optical touch control apparatus as claimed in claim 9, wherein this control unit is preset with a location database, in order to store multiple back up pad coordinate, and when this control unit obtains this triggering distance, obtain this contact position by this location database is searched corresponding to this back up pad coordinate of this triggering distance.
14. optical touch control apparatus as claimed in claim 13, wherein when multiple contact positions of this optical fiber are touched by this object, this control unit triggers distance according to corresponding to the multiple of the plurality of contact position and obtain the multiple back up pad coordinates corresponding to the plurality of triggering distance, and the plurality of back up pad coordinate is averaged and calculates and obtain a central contact position of the plurality of contact position by this control unit, and export this trigger signals corresponding to this central contact position.
15. optical touch control apparatus as claimed in claim 9, wherein this first end from the position of this object toward this optical fiber of this light echo is advanced, and this light echo by this first end reflection of this optical fiber and marches to the 2nd end of this optical fiber by this first end of this optical fiber and received by this optical sensing module.
16. optical touch control apparatus as claimed in claim 9, wherein this optical fiber comprises:
One fiber optic core, in order to transmit this first light beam and this light echo; And
One fiber outer layer, is coated on this fiber optic core, with so that this first light beam and this light echo are totally reflected in this fiber optic core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110351274.1A CN103092433B (en) | 2011-11-04 | 2011-11-04 | Optical touch board and optical touch control apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110351274.1A CN103092433B (en) | 2011-11-04 | 2011-11-04 | Optical touch board and optical touch control apparatus |
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| Publication Number | Publication Date |
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| CN103092433A CN103092433A (en) | 2013-05-08 |
| CN103092433B true CN103092433B (en) | 2016-06-08 |
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| CN201110351274.1A Expired - Fee Related CN103092433B (en) | 2011-11-04 | 2011-11-04 | Optical touch board and optical touch control apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106918716A (en) * | 2017-03-13 | 2017-07-04 | 无锡亚天光电科技有限公司 | A kind of optical fiber structure and its determination methods for judging landing object movement trend |
| CN108549504B (en) * | 2018-04-17 | 2021-11-26 | 中芯集成电路（宁波）有限公司 | Touch sensing substrate and touch device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201616089U (en) * | 2010-03-18 | 2010-10-27 | 北京汇冠新技术股份有限公司 | Touch screen and touch system |
| CN102169392A (en) * | 2010-02-26 | 2011-08-31 | 深圳华映显示科技有限公司 | Touch panel and touch sensing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7333094B2 (en) * | 2006-07-12 | 2008-02-19 | Lumio Inc. | Optical touch screen |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102169392A (en) * | 2010-02-26 | 2011-08-31 | 深圳华映显示科技有限公司 | Touch panel and touch sensing method |
| CN201616089U (en) * | 2010-03-18 | 2010-10-27 | 北京汇冠新技术股份有限公司 | Touch screen and touch system |
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