CN101996003B - Light guide module, optical touch module, and method thereof - Google Patents
Light guide module, optical touch module, and method thereof Download PDFInfo
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- CN101996003B CN101996003B CN 201010001820 CN201010001820A CN101996003B CN 101996003 B CN101996003 B CN 101996003B CN 201010001820 CN201010001820 CN 201010001820 CN 201010001820 A CN201010001820 A CN 201010001820A CN 101996003 B CN101996003 B CN 101996003B
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Abstract
The present invention discloses a light guide module that is applied in an optical touch module. A focusing component of the light guide module focuses the light emitted from a light guide component of the light guide module, so that all the light emitted from the light guide component can be convergently distributed in a touch area of the optical touch module. In this way, the light provided by a lighting component of the optical touch module can be effectively utilized, and the signal to noise ratio of the received signal of a sensor of the optical touch module increases. Therefore, the optical touch module can determines the location of the finger or the contacting object more correctly.
Description
Technical field
The present invention is about a kind of waveguide module, particularly a kind of waveguide module and method thereof that is applicable to the optical touch module.
Background technology
In recent years, Touch Screen (that is contact panel) is owing to can directly directly replace mechanical in the past push-botton operation with object or finger via touch control operation on screen.When user's touch-control during the figure on the screen, the haptic feedback system on the screen can be according to the various coupling arrangements of driven by program of programming in advance, and present lively visual and sound effects by screen-picture.
The touch control manner of common Touch Screen has resistance-type, condenser type, sound wave type and optical profile type etc.Resistance touch screen is to utilize the spaced apart two groups of indium tin oxides of separation material (Indium Tin Oxide, ITO) conductive layer utilize pressure to make the upper/lower electrode conducting calculate contacting points position input to predict the change in voltage on the screen when using.The capacitance touch control screen capacitance variations that to be the transparency electrode of utilize arranging with static between the human body combine is produced detects its coordinate from the induced current that is produced.The sound wave type Touch Screen utilizes electric signal to convert ultrasonic to via transducer in advance; And the surface of directly transmitting contact panel; When using contact panel, the contact stud thing can absorb ultrasonic and cause decay, draws the exact position after the damping capacity before and after using via comparison is also calculated.
The optical touch control screen is to utilize light source to receive the blocking principle, when light is interdicted, can learn the position that can not receive signal receiver, and then confirm its exact position.The composition assembly of optical touch control screen comprises glass substrate, light-emitting device, optical receiver and lens.The device mode is that light-emitting device and optical receiver are joined on the upper right drift angle that is put in glass substrate, and in the left side and the downside device reflecting strips of glass substrate.Illuminate long-range reflecting strips via light-emitting device, when finger or contactant blocking light, optical receiver can pass through lens and collect finger or the contactant relative position at glass substrate.
Therefore the optical touch control screen of known technology receives the influence of environment light source easily owing to utilize reflecting strips to come light that reflex reflexting device sends to detect finger or the contactant relative position at glass substrate.The same light that light and light-emitting device sent that reflecting strips reflected can produce reciprocal effect to optical receiver.In addition, long-range reflecting strips be must illuminate, contraposition more accurately and bigger output brightness and output current therefore needed owing to be placed in the light-emitting device of the upper right drift angle of glass substrate.
Summary of the invention
The present invention provides a kind of waveguide module.This waveguide module is applicable to an optical touch module.This optical touch module comprises a touch area, a sensor and a luminescence component.This sensor is positioned at one first corner of this touch area.This luminescence component is in order to provide a light.This waveguide module and this luminescence component are arranged on a first side of this touch area, in order to this light that this luminescence component provided is evenly distributed to this touch area.This waveguide module comprises a waveguide assemblies and a concentrating component.This waveguide assemblies is used for guiding this light along this waveguide assemblies diffusion.This waveguide assemblies comprises an incidence surface, and an exiting surface.This incidence surface towards this luminescence component to receive this light.This exiting surface is towards this touch area.This concentrating component is used for converging this light that penetrates from this exiting surface, intersperses among this touch area so that this light is concentrated.
The present invention provides a kind of optical touch module in addition.This optical touch module comprises a touch area, a sensor, a luminescence component, and a waveguide module.This sensor is positioned at one first corner of this touch area.This luminescence component is arranged on a first side of this touch area, in order to a light to be provided.This waveguide module is arranged on this first side of this touch area, in order to this light that this luminescence component provided is evenly distributed to this touch area.This waveguide module comprises a waveguide assemblies, and a concentrating component.This waveguide assemblies is used for guiding this light along this waveguide assemblies diffusion.This waveguide assemblies comprises an incidence surface, and an exiting surface.This incidence surface towards this luminescence component to receive this light.This exiting surface is towards this touch area.This concentrating component is used for converging this light that penetrates from this exiting surface, intersperses among this touch area so that this light is concentrated.
The present invention provides a kind of method of signal to noise ratio (S/N ratio) of raising one optical touch module in addition.This optical touch module comprises a touch area, a sensor, a luminescence component and a waveguide assemblies.This sensor is positioned at one first corner of this touch area.This luminescence component is in order to provide a light.This waveguide assemblies is used for guiding this light along this waveguide assemblies diffusion.This waveguide assemblies has an incidence surface and an exiting surface.This incidence surface towards this luminescence component to receive this light.This exiting surface is towards this touch area.This exiting surface that this method is contained in this waveguide assemblies is provided with a concentrating component, and this concentrating component converges this light that penetrates from this exiting surface, intersperses among this touch area so that this light is concentrated, and improves the signal to noise ratio (S/N ratio) of this optical touch module.
Description of drawings
Fig. 1 is the optical touch module vertical view according to the first embodiment of the present invention.
Fig. 2 is an optical touch module vertical view according to a second embodiment of the present invention.
Fig. 3 is the optical touch module vertical view of a third embodiment in accordance with the invention.
Fig. 4 is the optical touch module side view of a fourth embodiment in accordance with the invention.
Fig. 5 is waveguide assemblies and the synoptic diagram of luminescence component adjoiner according to a fifth embodiment of the invention.
Fig. 6 is the synoptic diagram of explanation waveguide module according to a sixth embodiment of the invention.
Fig. 7 works as light for explanation and directly penetrates the synoptic diagram to the touch area from waveguide assemblies.
Fig. 8, Fig. 9, Figure 10, and Figure 11 can make the light that luminescence component provided the synoptic diagram of the principle of work of more efficient utilization for explanation waveguide module.
Figure 12 is the synoptic diagram of explanation waveguide module according to a seventh embodiment of the invention.
Figure 13 is the synoptic diagram of the reflecting surface of explanation waveguide assemblies.
Figure 14 is the synoptic diagram of the structure of explanation waveguide assemblies.
Figure 15 is the synoptic diagram of another embodiment of the structure of explanation waveguide assemblies.
Figure 16 utilizes the synoptic diagram of the optical touch module of waveguide module for explanation.
Wherein, description of reference numerals is following:
100,1630 luminescence components
200a, 200b wavelet guide assembly
300,1620 sensors
400,1610 touch areas
500 lens
600 substrates
700 liquid crystal panels
800,900,1000,1640 waveguide modules
810,200 waveguide assemblies
820 concentrating components
811,210 incidence surfaces
812,220 exiting surfaces
813 leaded light bars
814 reflection subassemblies
815 reflectings surface
930 fixation kits
1010 steering structures
1600 optical touch modules
8131～8133 surfaces
A receives angular
L
A～L
DLight
Embodiment
Fig. 1 is the optical touch module vertical view according to the first embodiment of the present invention.Please refer to Fig. 1, in this embodiment, the optical touch module can be positioned on the display screen (such as the screen of LCD, the screen of cathode-ray tube display, electronic whiteboard etc.).
The optical touch module includes a touch area 400, a sensor 300, a luminescence component 100, and a waveguide assemblies 200.Sensor 300 is arranged at the corner of touch area 400.Luminescence component 100, waveguide assemblies 200 can be 1 with the quantity of sensor 300, also can be for more than 2.Explanation for ease, in this embodiment, the quantity of luminescence component 100 is that 1, the quantity of waveguide assemblies 200 are that 2, the quantity of sensor 300 are 1, but not limited with this.Waveguide assemblies 200 is arranged at least one side of touch area 400.Wherein, touch area 400 can be polygon (such as quadrilateral, pentagon or hexagon etc.), and waveguide assemblies 200 is arranged at the side of polygonal touch area 400.Waveguide assemblies 200 can include an incidence surface 210 and an exiting surface 220.Incidence surface 210 can be towards luminescence component 100.In other words, incidence surface 210 can be adjacent to luminescence component 100, that is incidence surface 210 can fit with the light output surface of luminescence component 100, or incidence surface 210 is corresponding at interval with the light output surface of luminescence component 100.Exiting surface 220 can be towards the touch area 400.
The optical touch module more can include lens 500.Lens 500 can be corresponding to sensor 300.Lens 500 can be between pairing sensor 300 and touch area 400.Lens 500 can be adjacent to sensor 300, that is lens 500 can fit with the receipts optical surface of sensor 300, or lens 500 are corresponding at interval with the receipts optical surface of sensor 300.
The touch area 400 of present embodiment can be rectangle (quadrilateral).Sensor 300 can be arranged on a corner of touch area 400.At this moment, luminescence component 100 can be arranged on identical or different corner, touch area 400 with sensor 300.In other words; Sensor 300 can be arranged on a corner of touch area 400; And luminescence component 100 can be arranged on the corner of touch area 400 relative sensors 300; Wherein to be arranged on the corner location of touch area 400 relative sensors 300 can be that luminescence component 100 is arranged on the adjacent angle position adjacent with sensor 300 to luminescence component 100, the diagonal position that also luminescence component 100 is arranged on and sensor 300 is relative at interval.When luminescence component 100 was arranged on the diagonal position relative at interval with sensor 300, two waveguide assemblies 200 can be arranged at respectively on the dual-side of the touch area 400 adjacent with luminescence component 100.The shape of waveguide assemblies 200 can be near an end of luminescence component 100 thicker, away from the thin taper structure of an end of luminescence component 100, but also slab construction.
Optical touch module disclosed according to the present invention, after luminescence component 100 emitted beam, meeting received the light that luminescence component 100 is sent by the incidence surface 210 of two waveguide assemblies 200 that are intended for luminescence component 100 earlier.By the difference of waveguide assemblies 200 with the outside air refractive index, light is limited to transmission in two waveguide assemblies 200, last light can leave two waveguide assemblies 200 via the diffusion structure of exiting surface 220 and be distributed in the touch area 400.Combine lens 500 to receive all light in the touch area 400 by sensor 300 again.When finger or other contactant body when being positioned at touch area 400; Can blocking part penetrate to the touch area 400 light by exiting surface 220; Sensor 300 is not after receiving by blocking light, and meeting and then judgement finger or other contactant body are positioned at the relative position of touch area 400.In this; By two waveguide assemblies 200 light that luminescence component 100 is sent is evenly distributed to touch area 400; In order to replace the light that uses reflecting strips reflection luminescence component 100 to be sent in the known technology, can increase the optical touch module to the resistivity of environment light source, the reciprocal effect of avoiding light that light that the luminescence component 100 of known technology sent and reflecting strips reflect that sensor 300 is caused.Simultaneously, can reach the luminosity that reduces luminescence component 100, the contraposition precision that reduces current loss and optical touch module.
Fig. 2 is an optical touch module vertical view according to a second embodiment of the present invention.Please refer to Fig. 2, and close with reference to previous embodiment.In this embodiment, two waveguide assemblies 200 also can two one in the waveguide assemblies 200 be arranged on the side of the touch area 400 adjacent with luminescence component 100.In two waveguide assemblies 200 another then is arranged on another side of the touch area 400 adjacent with luminescence component 100, wherein away from an end of luminescence component 100 along the touch area 400 the diagonal position that corner shape turnover extends to and luminescence component 100 is relative at interval.In turnover extends to the waveguide assemblies 200 of the diagonal position relative with luminescence component 100 intervals; Position in turnover can make a reflecting surface 250, makes light be passed to the diagonal position relative at interval with luminescence component 100 in waveguide assemblies 200 internal reflections via reflecting surface.In this; The light that luminescence component 100 is sent by two waveguide assemblies 200 conducts to three sides of touch area 400; Light can penetrate and be uniformly distributed in touch area 400 by waveguide assemblies 200; In order to replace the light that uses reflecting strips reflection luminescence component 100 to be sent in the known technology, can increase the optical touch module to the resistivity of environment light source, the reciprocal effect of avoiding light that light that the luminescence component 100 of known technology sent and reflecting strips reflect that sensor 300 is caused.Simultaneously, can reach the luminosity that reduces luminescence component 100, the contraposition precision that reduces current loss and optical touch module.
Fig. 3 is the optical touch module vertical view of a third embodiment in accordance with the invention.Please refer to Fig. 3, and close with reference to previous embodiment.In this embodiment, the optical touch module can include two luminescence components 100 and three waveguide assemblies 200.In this embodiment, touch area 400 can be rectangle (quadrilateral).Sensor 300 is arranged on a corner of touch area 400, and one in two luminescence components 100 be arranged on the corner of touch area 400 relative sensors 300, and another in two luminescence components 100 then is arranged on the corner of touch area 400 neighboring sensors 300.One of them be arranged at touch area 400 in three waveguide assemblies 200 is on the side between two luminescence components 100, and two other then is arranged at respectively on another adjacent side of touch area 400 and luminescence component 100.Optical touch module disclosed according to the present invention, after two luminescence components 100 emitted beam, the incident incidence surface 210 that is intended for two waveguide assemblies 200 of each luminescence component 100 received the light that each luminescence component 100 is sent respectively.By the difference of waveguide assemblies 200 with the outside air refractive index, light is limited to transmission in three waveguide assemblies 200, last light can leave three waveguide assemblies 200 via the diffusion structure of exiting surface 220 and be distributed in the touch area 400.Combine lens 500 to receive all light in the touch area 400 by sensor 300 again.When finger or other contactant body when being positioned at touch area 400, can interdict part and penetrate to the touch area 400 light by exiting surface 220.Sensor 300 is not after receiving by blocking light at this moment, and meeting and then judgement finger or other contactant body are positioned at the relative position of touch area 400.In this; By three waveguide assemblies 200 light that two luminescence components 100 are sent is evenly distributed to touch area 400; In order to replace the light that uses reflecting strips reflection luminescence component 100 to be sent in the known technology, can increase the optical touch module to the resistivity of environment light source, the reciprocal effect of avoiding light that light that the luminescence component 100 of known technology sent and reflecting strips reflect that sensor 300 is caused.Simultaneously, can reach the luminosity that reduces luminescence component 100, the contraposition precision that reduces current loss and optical touch module.
Fig. 4 is the optical touch module side view of a fourth embodiment in accordance with the invention.Please refer to Fig. 4, and close with reference to previous embodiment.In this embodiment, the optical touch module includes substrate 600.Substrate 600 can be positioned at the touch area 400 times.Substrate 600 can be printed circuit board (PCB), also can be indium tin oxide (IndiumTin Oxide, ITO) glass.In this embodiment, sensor 300, touch area 400 can be positioned on the liquid crystal panel 700 with lens 500.Wherein liquid crystal panel 700 can be made up of institutes such as ito glass, liquid crystal and optical filters.Luminescence component 100 can be positioned at ito glass (substrate 600) on the surface of touch area 400.Waveguide assemblies 200 can be incident in the waveguide assemblies 200 via incidence surface 210 in order to the light that luminescence component 100 is sent in abutting connection with luminescence component 100, by waveguide assemblies 200 light is conducted on the side of touch area 400.Owing to have transmission line and transistor on the ito glass with the liquid crystal deflection in the control liquid crystal panel 700.Therefore luminescence component 100 can be made on the ito glass in the processing procedure of ito glass in the lump.The light that utilizes waveguide assemblies 200 that waveguide assemblies 200 is sent again conducts on the liquid crystal panel 700, makes light leave waveguide assemblies 200 at last and penetrates to the touch area 400.
Optical touch module disclosed according to the present invention; Luminescence component 100 is made on the ito glass (substrate 600) of liquid crystal panel; The light that utilizes waveguide assemblies 200 that luminescence component 100 is sent again is limited in the waveguide assemblies 200 and transmits, and last light meeting outgoing is left waveguide assemblies 200 and is distributed in the touch area 400.Combine lens 500 to receive all light in the touch area 400 by sensor 300 again.When finger or other contactant body when being positioned at touch area 400; Can blocking part penetrate to the touch area 400 light by exiting surface 220; Sensor 300 is not after receiving by blocking light, and meeting and then judgement finger or other contactant body are positioned at the relative position of touch area 400.In this; By luminescence component 100 is made on the substrate 600; Utilize waveguide assemblies 200 that the light that luminescence component 100 is sent is evenly distributed to touch area 400 again, can reduce the thickness of optical touch module, reduce that simultaneously luminescence component is made in the first-class cost of printed circuit board (PCB) separately.
Fig. 5 is waveguide assemblies and a luminescence component adjoiner synoptic diagram according to a fifth embodiment of the invention.As shown in Figure 5, merge with reference to the 4th embodiment.In this embodiment, waveguide assemblies 200 can an end has the disposal area of ccontaining luminescence component 100, and the other end is divided into two wavelet guide assembly 200a, 200b, and 400 adjacent dual-sides extend towards the touch area respectively.The shape of the disposal area of wherein ccontaining luminescence component 100 can corresponding luminescence component 100 shape, and the inwall of disposal area is an incidence surface 210.The light that luminescence component 100 is sent can pass through incidence surface 210 incident wave guide assemblies 200, by two wavelet guide assembly 200a of waveguide assemblies, the adjacent dual-side that 200b conducts to light touch area 400.In this, by luminescence component 100 is made on the substrate 600, and receive the light that luminescence components 100 are sent by the incidence surface 210 of waveguide assemblies 200.Light can be respectively in waveguide assemblies 200 be conducted to the adjacent dual-side of touch area 400 with light and penetrated to the touch area 400 by two wavelet guide assembly 200a, 200b.As stated, can reduce the thickness of optical touch module, reduce that simultaneously luminescence component is made in the first-class cost of printed circuit board (PCB) separately.Optical touch module disclosed according to the present invention; By waveguide assemblies 200 light that luminescence component 100 is sent is evenly distributed to touch area 400, can increases the contraposition precision of optical touch module the resistivity of environment light source, the luminosity that reduces luminescence component 100, minimizing current loss and optical touch module.
Please refer to Fig. 6.Fig. 6 is the synoptic diagram of explanation waveguide module 800 according to a sixth embodiment of the invention.Waveguide module 800 can be applicable to optical touch module of the present invention.Waveguide module 800 improves according to aforesaid waveguide assemblies 200, does more efficient utilization with the light that luminescence component 100 is provided, and simultaneously light is evenly distributed to touch area 400.Waveguide module 800 comprises a waveguide assemblies 810, and a concentrating component 820.The structure of waveguide assemblies 810 and principle of work and aforesaid waveguide assemblies 200 are similar.Waveguide assemblies 810 is used for guiding light along waveguide assemblies 810 diffusion, and waveguide assemblies 810 comprises an incidence surface 811 and an exiting surface 812, incidence surface 811 towards luminescence component 100 to receive light.Exiting surface 812 is towards the touch area 400.Concentrating component 820 is used for converging the light that is penetrated from exiting surface 812, intersperses among touch area 400 so that light is concentrated.In addition, when luminescence component 100 is infrared light light emitting diode (that is to say, when luminescence component 100 sends infrared light), concentrating component 820 is the lens of infrared permeable.
Please refer to Fig. 7, Fig. 8, Fig. 9, Figure 10, and Figure 11.Fig. 7 directly penetrates to the touch area 400 synoptic diagram from waveguide assemblies 200 when light for explanation.Fig. 8, Fig. 9, Figure 10, and Figure 11 for explanation by the concentrating component 820 of different structure, waveguide module 800 can be made the light that luminescence component 100 is provided the synoptic diagram of the principle of work of more efficient utilization.Can find out by Fig. 7; Because the light that is provided when luminescence component 100 is during directly from waveguide assemblies 200 ejaculations, the intensity of light approximately is lambertian distribution (lambertian distribution), that is to say; When light when waveguide assemblies 200 penetrates, light can all evenly scattering on all directions.Yet,, represent that therefore part light is directly away from touch area 400 (light L as shown in Figure 7 for example, because the light that penetrates from waveguide assemblies 200 can be uniformly distributed on the vertical direction
A), and part light by substrate 600 reflection after, and away from touch area 400 (light L as shown in Figure 7 for example,
B).In other words, the light that provided of luminescence component 100 can't concentrate on touch area 400.So, the energy of the light that sensor 300 can receive is less, representes that therefore the signal to noise ratio (S/N ratio) of the signal that sensor 300 is received reduces, and causes the optical touch module to be difficult for judging the position of finger or contactant.Like Fig. 8, Fig. 9, Figure 10, and shown in Figure 11, and concentrating component 820 can be meniscus, protruding plano lens, convexo-convex lens, or plano-concave lens.More particularly; When concentrating component 820 is a meniscus (as shown in Figure 8); The convex surface of this meniscus is towards exiting surface 812; And the concave surface of this meniscus is towards the touch area 400, therefore when light when exiting surface 812 is injected touch area 400 through concentrating component 820, light is converged more concentratedly by meniscus; When concentrating component 820 is a protruding plano lens (as shown in Figure 9), the convex surface during this protruding plano lens is towards exiting surface 812, and the plane during this protruding plano lens is towards the touch area 400; When concentrating component 820 is a plano-concave lens (shown in figure 11), the plane of this plano-concave lens is towards exiting surface 812, and the concave surface of this plano-concave lens is towards this touch area 400.And by Fig. 8, Fig. 9, Figure 10, and Figure 11 can find out, converges the light that is penetrated from the exiting surface 812 of waveguide assemblies 810 by concentrating component 820, can make light near the parallel touch area 400 that is incident in.Therefore; Compared to waveguide assemblies 200, waveguide module 800 converges the light that is penetrated from exiting surface 812 by concentrating component 820, and the light that luminescence component 100 is provided can be directly away from touch area 400; Can be because of by after substrate 600 reflection yet, and away from touch area 400.Thus, the light that luminescence component 100 is provided can concentrate on touch area 400, and improves the energy of the received light of sensor 300, that is to say, improves the signal to noise ratio (S/N ratio) of the signal that sensor 300 received.Therefore, the optical touch module can more correctly be judged the position of finger or contactant.
Please refer to Figure 12.Figure 12 is the synoptic diagram of explanation waveguide module 900 according to a seventh embodiment of the invention.Compared to waveguide module 800, waveguide module 900 includes a fixation kit (holder) 930 in addition, is coupled to concentrating component 820.Fixation kit 930 is used for coating waveguide assemblies 810, so that waveguide module 900 is fixed on the substrate 600.In addition, at the concentrating component 820 of Figure 12 with meniscus as for example, yet concentrating component 820 also can be protruding plano lens, convexo-convex lens, or plano-concave lens.
Please refer to Figure 13.Figure 13 for explanation by as aforesaid waveguide assemblies comprise the design of reflecting surface, waveguide module 800 can guide light that luminescence component 100 provided from the touch area 400 a plurality of different side inject the synoptic diagram of touch area 400.In Figure 13, the waveguide assemblies 810 of waveguide module 800 comprises a reflecting surface 815 in addition.The structure of reflecting surface 815 and principle of work and reflecting surface 250 are similar.Reflecting surface 815 is positioned at the turning point of waveguide assemblies 810.Reflecting surface 815 is used for making the light can be via reflecting surface 815 not penetrate via the turning point of waveguide assemblies 810 in waveguide assemblies 810 internal reflections.In other words, by the design of reflecting surface 815, waveguide module 800 can be arranged at a plurality of sides of touch area 400.For example, in Figure 13, waveguide module 800 is arranged at three sides of touch area 400.Thus, be illustrated in the optical touch module, only need a luminescence component (100) and a waveguide module (800), can 400 a plurality of different side import touch area 400 from the touch area with light, and light is disseminated in the touch area equably.In addition, similar with waveguide assemblies 200, the shape of waveguide assemblies 810 can be a taper structure (like Fig. 1～shown in Figure 3, thicker near an end of luminescence component 100, thinner away from an end of luminescence component 100), also can be a slab construction (shown in figure 13).
Please refer to Figure 14.Figure 14 is the synoptic diagram of the structure of explanation waveguide assemblies 810.Waveguide assemblies 810 comprises a leaded light bar 813 in addition, and a reflection subassembly 814.Shown in figure 14, the surface 8131 of leaded light bar 813 is used as incidence surface 811.Therefore, the surface 8131 of leaded light bar 813 is towards luminescence component 100.The surface 8132 of leaded light bar 813 is used as exiting surface 812.Reflection subassembly 814 coats leaded light bar 813.Reflection subassembly 814 is used for reflecting the non-light that is penetrated from exiting surface 812 (surface 8132 of leaded light bar 813) and gets back to leaded light bar 813, so that the light that waveguide assemblies 810 is guided is all injected touch area 400 from exiting surface 812 (surface 8132 of leaded light bar 813).For example, the light L in Figure 14
CWhen being incident upon the surface 8133 of leaded light bar 813, light L
CAssembly 814 reflected back leaded light bars 813 are reflected.Therefore, last, light L
CPenetrate from exiting surface 812 (surface 8132 of leaded light bar 813).
Please refer to Figure 15.Figure 15 is the synoptic diagram of another embodiment 1000 of the structure of explanation waveguide assemblies.Compared to the waveguide assemblies 810 of Figure 14, waveguide assemblies 1000 comprises a steering structure 1010 in addition.Steering structure 1010 is used for incidence surface 811 transposition to towards substrate 600, and the turn light rays that will be received from incidence surface 811 is for being parallel to substrate, light is guided to leaded light bar 813.More particularly, by steering structure 1010, in waveguide assemblies 1000, incidence surface 811 can be towards substrate 600.Therefore, luminescence component 100 can be set directly on the substrate 600, and does not need through the turn light rays of other connector so that luminescence component 100 is provided.For example, in Figure 15, steering structure 1010 for reflection subassembly 814 and 813 turnovers of leaded light bar forming a leg-of-mutton structure, a light L who is provided when luminescence component 100
DWhen steering structure 1010 is injected in the top, light L
DMeeting is process leaded light bar 813 earlier, and then is belonged to the partial reflection of reflection subassembly 814 in the steering structure 1010, and turns to right-hand incident.In addition, because waveguide assemblies is a flat pattern, therefore the area on the surface 8131 (incidence surface 811) of leaded light bar 813 is very little in Figure 14.So, the light that causes luminescence component 100 to be provided can't be injected the surface 8131 (incidence surface 811) of leaded light bar 813 effectively.Yet in Figure 15, owing to the design by steering structure 1010, incidence surface 811 can be towards substrate 600, even therefore waveguide assemblies 1000 is a flat pattern, the area of incidence surface 811 still can not be restricted.So, the area of incidence surface 811 is programmable enough big, to receive the light that luminescence component 100 is provided effectively.
Please refer to Figure 16.Figure 16 utilizes the vertical view of preferred embodiment of the optical touch module 1600 of waveguide module for explanation the present invention.Optical touch module 1600 comprises a touch area 1610, a sensor 1620, a luminescence component 1630, and a waveguide module 1640.Sensor 1620 is arranged in one first corner (at Figure 16 with upper right corner as for example) of touch area 1610.Luminescence component 1630 is arranged on a first side (in Figure 16 with left side as for example) of touch area 1610, in order to light to be provided.Waveguide module 1640 is arranged on three sides of touch area 1610, is evenly distributed to touch area 1610 in order to the light that luminescence component 1630 is provided.The structure of utilizing the described waveguide module of Fig. 6 to Figure 15 is to implement waveguide module 1640; But the substrate of the incidence surface faces downwards of the waveguide assemblies of waveguide module 1640, so luminescence component 1630 can directly be arranged on this substrate the position corresponding to the incidence surface of the waveguide assemblies of waveguide module 1640.So, the light that luminescence component 1630 is provided can be by the waveguide assemblies and the concentrating component of waveguide module 1640, concentrating on touch area 1610, and improves the signal to noise ratio (S/N ratio) of the signal that sensor 1620 received.Therefore, optical touch module 1600 can more correctly be judged the position of finger or contactant.In addition; In Figure 16; Only comprising a luminescence component 1630 with optical touch module 1600 is example, by the design of the reflecting surface 815 of waveguide assemblies 810, the light guiding that waveguide module 1640 can be provided luminescence component 1630 from the touch area three sides of 1610 inject touch area 1610.Yet when the position of the luminescence component of optical touch module 1600 and number changed, corresponding design also can be made according to above stated specification with number in the position of the waveguide module of optical touch module 1600.For example, the mode that optical touch module 1600 can similar Fig. 1 is implemented, and that is to say that two waveguide modules are divided into the dual-side of touch area, and receives the light that same luminescence component provides, so that the dual-side of light from the touch area imported; Optical touch module 1600 also can similar Fig. 2 mode implement, that is to say that three waveguide modules are arranged at three sides of touch area respectively, import with three sides of light that two luminescence components are provided from the touch area; Or; Optical touch module 1600 also can similar Fig. 3 mode implement, that is to say that one first waveguide module is arranged at the first side (left side) of touch area; One second waveguide module is by the design of reflective surface; With the second side (lower side) that is arranged at the touch area and the 3rd side (right edge), first and second waveguide module receives the light that same luminescence component provides, and light is imported the touch area from first, second and the 3rd side of touch area.
In sum, the present invention provides a kind of waveguide module, can be applicable to the optical touch module.Waveguide module of the present invention converges the light that penetrates from waveguide assemblies by concentrating component, can make light concentrate the touch area that intersperses among the optical touch module.Thus, the light that luminescence component provided can be effectively utilized, and improves the signal to noise ratio (S/N ratio) of the signal that sensor received.Therefore, the optical touch module can more correctly be judged the position of finger or contactant.In addition, waveguide module of the present invention is by the design of steering structure; Can make incidence surface towards substrate, so the area of incidence surface is more unrestricted, the light that can receive luminescence component effectively and provided; And luminescence component can directly be arranged on the substrate, brings the user bigger convenience.
The above is merely the preferred embodiments of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (13)
1. waveguide module; Be applicable to an optical touch module, this optical touch module comprises a touch area, a sensor and a luminescence component, and this sensor is positioned at one first corner of this touch area; This luminescence component is in order to provide a light; This waveguide module and this luminescence component are arranged on a first side of this touch area, and in order to this light that this luminescence component provided is evenly distributed to this touch area, this waveguide module is characterised in that and comprises:
One waveguide assemblies is used for guiding this light along this waveguide assemblies diffusion, comprises:
One leaded light bar, a first surface of this leaded light bar is used as an incidence surface, a second surface of this leaded light bar is used as an exiting surface, this incidence surface be towards this luminescence component to receive this light, this exiting surface is towards this touch area; And
One reflection subassembly coats this leaded light bar, is used for reflecting non-ly getting back to this leaded light bar from this light that this exiting surface penetrated, so that this light that this waveguide assemblies guided is injected this touch area from this exiting surface; And
One concentrating component is used for converging this light that penetrates from this exiting surface, intersperses among this touch area so that this light is concentrated.
2. waveguide module as claimed in claim 1 is characterized in that, this luminescence component is the infrared light light emitting diode, and this concentrating component is the lens of infrared permeable.
3. waveguide module as claimed in claim 1 is characterized in that, this waveguide module includes a fixation kit in addition, is used for coating this waveguide assemblies so that this waveguide module is fixed in a substrate; This substrate is an indium tin oxide glass.
4. waveguide module as claimed in claim 3 is characterized in that, this luminescence component is positioned at one second corner of a second side of this touch area; This first side is relative with this second side; This waveguide module comprises a steering structure in addition; It is towards this substrate that this steering structure is used for this incidence surface transposition; And will be from turn light rays that this incidence surface received for being parallel to this substrate, and this luminescence component is arranged at this substrate and this luminescence component is luminous to this incidence surface.
5. waveguide module as claimed in claim 1 is characterized in that, this concentrating component is meniscus, protruding plano lens, convexo-convex lens, or plano-concave lens; When this concentrating component was a meniscus, the convex surface of this meniscus was towards this exiting surface, and the concave surface of this meniscus is towards this touch area; When this concentrating component was a protruding plano lens, the convex surface of this protruding plano lens was towards this exiting surface, and the plane of this protruding plano lens is towards this touch area; When this concentrating component was a plano-concave lens, the plane of this plano-concave lens was towards this exiting surface, and the concave surface of this plano-concave lens is towards this touch area.
6. waveguide module as claimed in claim 1; It is characterized in that; This waveguide assemblies comprises a reflecting surface in addition, and this reflecting surface is positioned at a turning point of this waveguide assemblies, is used for making this light can be via this reflecting surface not penetrate via this turning point of this waveguide assemblies in this waveguide assemblies internal reflection.
7. an optical touch module is characterized in that, comprises:
One touch area;
One sensor is positioned at one first corner of this touch area;
One luminescence component is arranged on a first side of this touch area, in order to a light to be provided; And
One waveguide module is arranged on this first side of this touch area, and in order to this light that this luminescence component provided is evenly distributed to this touch area, this waveguide module comprises:
One waveguide assemblies is used for guiding this light along this waveguide assemblies diffusion, comprises:
One leaded light bar, a first surface of this leaded light bar is used as an incidence surface, a second surface of this leaded light bar is used as an exiting surface, this incidence surface be towards this luminescence component to receive this light, this exiting surface is towards this touch area; And
One reflection subassembly coats this leaded light bar, is used for reflecting non-ly getting back to this leaded light bar from this light that this exiting surface penetrated, so that this light that this waveguide assemblies guided is injected this touch area from this exiting surface; And
One concentrating component is used for converging this light that penetrates from this exiting surface, intersperses among this touch area so that this light is concentrated.
8. optical touch module as claimed in claim 7 is characterized in that, this luminescence component is the infrared light light emitting diode, and this concentrating component is the lens of infrared permeable.
9. optical touch module as claimed in claim 7 is characterized in that, this waveguide module includes a fixation kit in addition, is used for coating this waveguide assemblies so that this waveguide module is fixed in a substrate; This substrate is an indium tin oxide glass.
10. optical touch module as claimed in claim 9 is characterized in that, this luminescence component is positioned at one second corner of a second side of this touch area; This first side is relative with this second side; This waveguide module comprises a steering structure in addition; It is towards this substrate that this steering structure is used for this incidence surface transposition; And will be from turn light rays that this incidence surface received for being parallel to this substrate, and this luminescence component is arranged at this substrate and this luminescence component is luminous to this incidence surface.
11. optical touch module as claimed in claim 7 is characterized in that, this concentrating component is meniscus, protruding plano lens, convexo-convex lens, or plano-concave lens; When this concentrating component was meniscus, the convex surface of this meniscus was towards this exiting surface, and the concave surface of this meniscus is towards this touch area; When this concentrating component was protruding plano lens, the convex surface of this protruding plano lens was towards this exiting surface, and the plane of this protruding plano lens is towards this touch area; When this concentrating component was plano-concave lens, the plane of this plano-concave lens was towards this exiting surface, and the concave surface of this plano-concave lens is towards this touch area.
12. optical touch module as claimed in claim 7; It is characterized in that; This waveguide assemblies comprises a reflecting surface in addition; This reflecting surface is positioned at a turning point of this waveguide assemblies, is used for making this light can be via this reflecting surface not penetrate via this turning point of this waveguide assemblies in this waveguide assemblies internal reflection.
13. method that improves the signal to noise ratio (S/N ratio) of an optical touch module; This optical touch module comprises a touch area, a sensor, a luminescence component and a waveguide assemblies, and this sensor is positioned at one first corner of this touch area, and this luminescence component is in order to provide a light; This waveguide assemblies is used for guiding this light along this waveguide assemblies diffusion; This waveguide assemblies has a leaded light bar and a reflection subassembly, and a first surface of this leaded light bar is intended for an incidence surface, and a second surface of this leaded light bar is intended for an exiting surface; This reflection subassembly coats this leaded light bar; Be used for reflecting and non-ly get back to this leaded light bar from this light that this exiting surface penetrated so that this light that this waveguide assemblies guided is injected this touch area from this exiting surface, this incidence surface towards this luminescence component to receive this light; This exiting surface the method is characterized in that to comprise towards this touch area:
This exiting surface in this waveguide assemblies is provided with a concentrating component; And
This concentrating component converges this light that penetrates from this exiting surface, intersperses among this touch area so that this light is concentrated, and improves the signal to noise ratio (S/N ratio) of this optical touch module.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US23534509P | 2009-08-19 | 2009-08-19 | |
| US61/235,345 | 2009-08-19 |
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| Publication Number | Publication Date |
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| CN101996003A CN101996003A (en) | 2011-03-30 |
| CN101996003B true CN101996003B (en) | 2012-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010001820 Expired - Fee Related CN101996003B (en) | 2009-08-19 | 2010-01-07 | Light guide module, optical touch module, and method thereof |
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| Country | Link |
|---|---|
| CN (1) | CN101996003B (en) |
| TW (2) | TWI410685B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI423098B (en) * | 2010-07-15 | 2014-01-11 | Quanta Comp Inc | Optical touch structure |
| TW201239710A (en) * | 2011-03-29 | 2012-10-01 | Genius Electronic Optical Co Ltd | Optical touch system |
| TWI456460B (en) | 2011-06-02 | 2014-10-11 | Pixart Imaging Inc | Light path adjusting assembly and optical touch device suing the same |
| CN102830853B (en) * | 2011-06-14 | 2016-08-03 | 原相科技股份有限公司 | Light path adjusts assembly and uses the optical touch control apparatus of this structure |
| CN102841709A (en) * | 2011-06-22 | 2012-12-26 | 原相科技股份有限公司 | Light guide assembly and optical touch module with same |
| TWI497376B (en) * | 2011-07-22 | 2015-08-21 | Rapt Ip Ltd | Optical coupler assembly for use in an optical touch sensitive device |
| TWI452361B (en) * | 2011-11-15 | 2014-09-11 | Sonix Technology Co Ltd | Light guide element, optical system and optical touch display module |
| CN203012682U (en) * | 2012-11-30 | 2013-06-19 | 北京汇冠新技术股份有限公司 | Infrared touch screen |
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|---|---|---|---|---|
| EP1271211A2 (en) * | 2001-06-25 | 2003-01-02 | Fujitsu Limited | Optical coupling device with optical waveguide coupled to optical device |
| CN1635541A (en) * | 2003-12-26 | 2005-07-06 | 北京汇冠新技术有限公司 | Photoelectric detection positioning system and method for computer touch screen |
| CN101432647A (en) * | 2006-05-01 | 2009-05-13 | Rpo私人有限公司 | Waveguide materials for optical touch screens |
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|---|---|---|---|---|
| US8184108B2 (en) * | 2004-06-30 | 2012-05-22 | Poa Sana Liquidating Trust | Apparatus and method for a folded optical element waveguide for use with light based touch screens |
| AU2006209811A1 (en) * | 2005-02-07 | 2006-08-10 | Rpo Pty Limited | Waveguide design incorporating reflective optics |
| US7369724B2 (en) * | 2006-10-03 | 2008-05-06 | National Semiconductor Corporation | Apparatus and method for an improved lens structure for polymer wave guides which maximizes free space light coupling |
| TWM363032U (en) * | 2009-02-25 | 2009-08-11 | Pixart Imaging Inc | Optical touch control module |
-
2009
- 2009-11-10 TW TW98138063A patent/TWI410685B/en not_active IP Right Cessation
- 2009-11-10 TW TW98220814U patent/TWM379764U/en not_active IP Right Cessation
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1271211A2 (en) * | 2001-06-25 | 2003-01-02 | Fujitsu Limited | Optical coupling device with optical waveguide coupled to optical device |
| CN1635541A (en) * | 2003-12-26 | 2005-07-06 | 北京汇冠新技术有限公司 | Photoelectric detection positioning system and method for computer touch screen |
| CN101432647A (en) * | 2006-05-01 | 2009-05-13 | Rpo私人有限公司 | Waveguide materials for optical touch screens |
Also Published As
| Publication number | Publication date |
|---|---|
| TWM379764U (en) | 2010-05-01 |
| CN101996003A (en) | 2011-03-30 |
| TWI410685B (en) | 2013-10-01 |
| TW201107807A (en) | 2011-03-01 |
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