CN103399671B

CN103399671B - Double-camera touch screen system and its felt pen

Info

Publication number: CN103399671B
Application number: CN201310185667.9A
Authority: CN
Inventors: 李兴文; 孙倩倩
Original assignee: Shanghai Kedou Electronic Technology Co Ltd
Current assignee: Jiashan Taozhuang renewable resources Co., Ltd
Priority date: 2009-08-17
Filing date: 2009-08-17
Publication date: 2017-11-21
Anticipated expiration: 2029-08-17
Also published as: CN103399671A

Abstract

The present invention relates to touch-screen system field, and in particular to a kind of optical touch screen systems.Double-camera touch screen system, including touch pad, signal processing system, in addition to light-sensitive element group, light-sensitive element group include a plurality of light-sensitive elements, and a plurality of light-sensitive elements connect signal processing system.Also include a light source, the more uniform outer surface that is radiated at of light caused by light source has on the touch pad of transparent medium, and is transmitted to touch pad outside.Contact felt pen, including switch and light-emitting component, the luminous situation of switch control light-emitting component.Remote touch pen includes laser, power supply, in addition to one is easy to hand-held shell, and the laser, power supply are arranged in shell, and switch is provided between the laser and the power supply, and the switch is set on the housing.Strong antijamming capability, greasy dirt is not afraid of, suitable for the heavier occasion of the greasy dirts such as factory floor, mining area.The conversion between remote touch pattern and contact touch mode can easily be realized.

Description

Double-camera touch screen system and its felt pen

The applying date of the original application of the divisional application is：On August 17th, 2009, Application No.：2009101663237, name Referred to as：Optical touch screen and optical touch screen light source and felt pen.

Technical field

The present invention relates to touch-screen system field, and in particular to a kind of optical touch screen systems.

Background technology

Existing mainly to have two kinds using touch-screen system made of optical characteristics, one kind is Infrared touch screen systems；One Kind is the touch-screen system for being called electronic laser blank for being mainly used in projecting apparatus, utilizes laser tracking technology surface sweeping felt pen Mark.

Existing Infrared touch screen systems, including correlation type infrared touch screen system and the back side are provided with the red of optical receiver component Outer touch-screen system.Infrared touch screen systems have stable performance, strong antijamming capability, longevity relative to other touch-screen systems Order the series of advantages such as length, precision height.Almost with overwhelming advantage, the market of other touch-screen systems is gradually captured.

It is exactly that infrared window fearness is dirty but Infrared touch screen systems still have a fatefulue weakness to be difficult to overcome.Unclean Environment should not use, for example can not apply in the heavier occasion of the greasy dirts such as factory floor, mining area；For example it can not apply in train The open public arena such as Waiting Lounge, extramural cash dispenser.Infrared emission pipe is filled on the outside of screen in addition, has influence on and finishes The compactedness of structure, on small-sized screen inconvenience use, such as inconvenience is with the screen of mobile phone and palm PC.Other infrared touch Screen system cost is still higher, and resolution ratio is still relatively low.

Electronic laser whiteboard system is mainly used for coordinating projecting apparatus use.Projecting apparatus screen both sides, which are respectively equipped with, to be used to sweep Retouch the generating laser of projecting apparatus screen.After electronic laser blank starts, generating laser sends laser scanning projection's instrument screen Surface.The photosensitive pen supporting with it has the function of sensing laser, and such user's use feeling light pen operates on electronic whiteboard When, generating laser can scan the position of photosensitive pen.The same computer of positional information that electronic laser whiteboard system passes through photosensitive pen Interact.

Electronic laser whiteboard system structure is complex, so cost is also high, general price is at 3000 yuan to 7000 yuan.Peace Adjustment examination is difficult, needs professional to position its laser scanning part during installation, in position inaccurate or use slightly Micro-shifting is dynamic all easily to cause maloperation, or even can cause to be unable to normal use, therefore use occasion is very limited.

Comprehensive existing touch-screen system, it is also the same without there is a kind of sensitive paper till now, people can be allowed to lie prone The touch-screen system to write above.People can not obtain the sensation and conveniently of original writing by touch-screen system.It is existing to touch Touch screen system and still have that poor anti jamming capability, resolution ratio are low, are not easy to the shortcomings of remote control.

The content of the invention

It is an object of the invention to provide a kind of double-camera touch screen system, can effectively improve the property of touch-screen system Energy.

The present invention also aims to provide the felt pen with double-camera touch screen system support, the felt pen, bag Include contact felt pen and remote touch pen.Contact felt pen, double-camera touch screen system is coordinated to carry out contact touch. Remote touch pen, double-camera touch screen system is coordinated to realize remote touch.

The present invention uses following technical scheme to achieve the above object：

Double-camera touch screen system, including touch pad, signal processing system, in addition to light-sensitive element group, it is described photosensitive Element group includes a plurality of light-sensitive elements, and a plurality of light-sensitive elements connect signal processing systems, the photosensitive member in light-sensitive element group Part is connected with touch pad by light；

During using double-camera touch screen system, be presented a related luminous point on a touchpad, light-sensitive element by from The irradiation of the light of the luminous point, it is reflected as the electric signal of correlation.

A related luminous point is presented on a touchpad, light-sensitive element group is irradiated by the light from the luminous point, instead Reflect for the electric signal of correlation, the intensity and the distance dependent of light-sensitive element to the luminous point of the electric signal；Light-sensitive element produces Electric signal be sent to signal processing system, signal processing system is by analyzing a plurality of telecommunications caused by a plurality of light-sensitive elements Number the information including intensity, obtain the positional information of the luminous point on a touchpad.

It is also possible that the double-camera touch screen system includes a plurality of light-sensitive element groups, the light-sensitive element group front Provided with a plus lens.By plus lens by the photosurface of light collection to the light-sensitive element group.Plus lens can be with Can also be that luminous point is passed through into the light irradiation converged on photosurface, no by luminous point clearly as being presented on photosurface It must be imaged.

After employing plus lens, caused electric signal in the light-sensitive element group, with luminous point relative to the photosensitive member The distance of part group is relevant with angle.Allow the light-sensitive element of light-sensitive element group being integrated in less space, system can be reduced Difficulty is made, and reduces cost.The angular relationship between light-sensitive element group and luminous point is introduced in addition, aids in determining whether the position of luminous point Put.

Electric signal caused by light-sensitive element is sent to signal processing system, and signal processing system is by analyzing light-sensitive element group Caused electrical signal information, obtain the positional information of the luminous point on a touchpad.The signal processing system processing photosensitive member Caused electric signal in part group, the information with distance dependent in electric signal can be handled, can also handle in electric signal with angle Relevant information, can be with integrated treatment.

Light-sensitive element group can be formed by a plurality of independent light-sensitive element sequential combinations, can also will be a plurality of photosensitive Element is integrated on an integrated package, can also be directly using the imaging sensor for being integrated with a large amount of light-sensitive elements.

When the luminous point is flashed with certain frequency, light-sensitive element will produce the vibration related to the optical signal frequency of luminous point Electric signal, the electric signal of vibration are easy to amplification, frequency-selecting, have more preferable anti-interference, therefore the luminous point is selected with certain frequency The luminous point of rate flicker, signal processing system include a frequency-selecting module corresponding with the luminous point flicker frequency.It is on a touchpad Existing can be by the luminous point of double-camera touch screen system identification, it is believed that is the luminous point related to double-camera touch screen system. Generally related luminous point needs to meet, flicker frequency is corresponding with the frequency-selecting module of double-camera touch screen system, luminous point Wavelength of light it is corresponding with the reception wavelength of light-sensitive element.

The requirement to touching plate shape is not involved with above-mentioned technical proposal, the shape of touch pad is not particularly limited. Because the screen used now is mostly the screen of quadrangle, explained referring to the touch pad of quadrangle.

Signal processing system in the present invention, can be by comparing the range difference of luminous point light-sensitive element into light-sensitive element group Value relation obtains the position of the luminous point, the optical signal from the luminous point that the difference of distance is received by each light-sensitive element The difference of intensity is reflected.For the touch pad of plane, it is only necessary to which the light-sensitive element of two row's cross arrangements both can determine that luminous point Position.The transversely arranged light-sensitive element of one row, by electric signal difference relationship related caused by each light-sensitive element, determine light The lateral coordinates of point；The light-sensitive element of one row's longitudinal arrangement, by electric signal difference relationship related caused by each light-sensitive element, The longitudinal coordinate of luminous point is determined, so that it is determined that the position of luminous point on a touchpad.It is described " light-sensitive element in light-sensitive element group with Touch pad is connected by light " refer in the light by touch pad, at least Ray Of Light passes through light-sensitive element.Light-sensitive element group In light-sensitive element all need not be connected with touch pad by light, but at least two light-sensitive elements pass through light with touch pad Connection.

Signal processing system in the present invention, can also be by described in the angular relationship acquisition between luminous point and light-sensitive element group The position of luminous point.The present invention is by plus lens by the photosurface of light collection to the light-sensitive element group.Angular relationship is led to Plus lens is crossed to be reflected the position that the optical signal of the luminous point is converged in light-sensitive element group.Touch for plane Plate, two groups of light-sensitive element groups with plus lens can determine the position of luminous point.One light-sensitive element group determine one with The relevant polar coordinates of angle, two light-sensitive element groups determine two interlaced polar coordinates relevant with angle.Pass through bag The information that two polar coordinates are determined is included, determines the position of luminous point.

When signal processing system obtains the position of the luminous point by the angular relationship between luminous point and light-sensitive element group, also may be used Analyzed with the difference relationship to the light signal strength on light-sensitive element in light-sensitive element group, to improve precision.

Touch pad can select the screen of display, as the screen, liquid crystal display equipment screen, negative electrode of projecting display show Show tube display（CRT）Screen, the screen of light-emitting diode display, projecting apparatus screen；The transparent protection that can also be selected in front of screen Plate.

Light-sensitive element when touch pad is screen in photosensitive element group can be arranged on screen periphery.Screen is the screen of printing opacity During curtain, such as the screen of projecting display, because the light of luminous point can penetrate screen, the light-sensitive element in light light-sensitive element group It can be arranged on except that can be arranged in front of screen, screen rear can also be arranged in；Screen is the screen that front is transparent medium During curtain, transparent medium such as glass, transparent plastics, the light that luminous point projects can be in transparent medium internal communication to transparent medium Around, therefore the light-sensitive element in light-sensitive element group can also be arranged in light transmission medium except that can be arranged in surrounding in front of screen Around edge.

Light-sensitive element group can set plus lens, can also be not provided with.It is corresponding in the case where setting plus lens Selection, by the information including the angular relationship between luminous point and light-sensitive element group, at the signal for obtaining the light spot position Reason system.In the case where being not provided with plus lens, corresponding selection, by comparing luminous point light-sensitive element into light-sensitive element group Distance difference relation obtain the luminous point position signal processing system.Herein below emphasis is not provided with light-sensitive element group The situation of plus lens is that emphasis is told about.

When touch pad is transparent protective plate, the light of luminous point obviously can penetrate protective plate, so light-sensitive element group can To be arranged on the front of protective plate；It can also be arranged between screen and protective plate, i.e., behind protective plate；It can also be arranged in Around protective plate edge.According to above-mentioned design structure, double-camera touch screen system can make polytype dual camera Touch-screen system.

The present invention divides according to mode of operation is different, including, the double-camera touch screen system of contact touch, remote touch Double-camera touch screen system.

First, the double-camera touch screen system that contact touches

The light source of the luminous point has three kinds of forms, and a kind of form is that double-camera touch screen system does not have light source in itself, The extraneous device used with the collocation of double-camera touch screen system has light source, the device such as contact felt pen of collocation, the light Source produces the luminous point；A kind of form is that double-camera touch screen system has double-camera touch screen system source in itself, double Camera touch-screen system light source has light source, and the light source is the light source of the luminous point；A kind of form is double-camera touch screen System has double-camera touch screen system source in itself, and the extraneous device with the collocation of double-camera touch screen system also has light Source, the light source of the luminous point is any one light source therein.

（1）Double-camera touch screen system does not have light source in itself：

Needing the extraneous device used with the collocation of double-camera touch screen system to coordinate with double-camera touch screen system makes With the device such as contact felt pen of collocation.

Contact felt pen lights when being contacted with optical touch pad, forms a luminous point on a touchpad, luminous point is with contact The movement of felt pen and move, so as to by mobile luminous point realize that contact felt pen touches to double-camera touch screen system Touch operation.

Contact felt pen, it is characterised in that including a shell, power supply, switch and light-emitting component, switch control light-emitting component Luminous situation；Switch is connected with the touch end of contact felt pen, touches end trigger switch when touching touch pad, and light member Part lights, and forms luminous point on a touchpad.

The signal generating module for producing electric oscillation signal can be accessed between power supply and light-emitting component, light-emitting component is produced sudden strain of a muscle Bright optical signal.

Touch pad Application Range is wider, as the screen of projecting display, liquid crystal display equipment screen, negative electrode display tube are shown Device（CRT）Screen, the screen of light-emitting diode display, projecting apparatus screen；The transparent protective plate that can also be selected in front of various screens.

Light-sensitive element is arranged in screen periphery in photosensitive element group when touch pad is screen.Screen is the screen with translucency During curtain, such as the screen of projecting display, because luminous point can penetrate screen, light-sensitive element is removed and can arranged in light-sensitive element group Side before screen, can also be arranged in screen rear；When screen is the screen that front is transparent medium, transparent medium such as glass, Transparent plastics, the light that luminous point projects can be in transparent medium internal communications to transparent medium periphery, therefore light-sensitive element group Middle light-sensitive element can also be arranged in around transparent medium edge, be also embedded within transparent except that can be arranged in front of screen Media interior.

When touch pad is transparent protective plate, the light of luminous point obviously can penetrate protective plate, so light-sensitive element group can To be arranged on the front of protective plate, and it is arranged in around protective plate；It can also be arranged between screen and protective plate, i.e. protective plate Behind, it is arranged in around protective plate；It can also be arranged in around protective plate edge；It is also embedded within inside transparent medium.

（2）Double-camera touch screen system has double-camera touch screen system source in itself：

Double-camera touch screen system also includes a dual camera touch-screen system light source, described to have light source.Touch pad Front portion is transparent medium, and the more uniform outer surface that is radiated at of light caused by the light source has on the touch pad of transparent medium, and Transmitted on the outside of to touch pad.

Light source is from touching the more uniform irradiation of back or side on a touchpad, and to more uniform on the outside of touch pad Penetrate；Part contact touch pad is touched using one, part is touched and is irradiated by the light of light source, form luminous point.The touch part refers to touch The object of touch pad is touched, can be finger, pen etc..

Luminous point moves with the movement for touching part, passes through the presence or absence of the movement of luminous point, luminous point and the flicker frequency of luminous point Touch operation of the part to double-camera touch screen system is touched Deng information realization.

The protective plate of screen transparent front can be selected in touch pad, can also select screen.If from screen, screen is needed Front is transparent medium, liquid crystal display equipment screen such as can be selected, negative electrode shows tube display（CRT）Screen.

Using protective plate as touch pad：

Strip-shaped light source is provided with the horizontal side of the close screen side of protective plate, it is photosensitive that another horizontal side is provided with a row The light-sensitive element group of element composition, the light of strip-shaped light source pass through protective plate, and direction of illumination is another transverse direction one corresponding thereto Side, and in front of pico- oblique protective plate；Strip-shaped light source, another longitudinal direction are provided with longitudinal side of the close screen side of protective plate Side is provided with the light-sensitive element group of row's light-sensitive element composition, and the light of strip-shaped light source passes through protective plate, direction of illumination be and its Relative another longitudinal side, and in front of pico- oblique protective plate.Because strip-shaped light source is in front of pico- oblique protective plate, There can be the light in total reflection state in protective plate, these light are also beneficial to uniform light.

Two row's light-sensitive elements connection one, is obtained by comparing luminous point distance difference relation of light-sensitive element into light-sensitive element group To the signal processing system of the position of the luminous point.The light-sensitive element group that above-mentioned two are made up of row's light-sensitive element, can be with Be substituted for the light-sensitive element group provided with plus lens, two light-sensitive element groups for being provided with plus lens connect through including luminous point with The information including angular relationship between light-sensitive element group, obtain the signal processing system of the light spot position.Two are provided with convergence The light-sensitive element group of lens, the corner of protective plate is easily disposed in, can effectively reduce blind area.

It the strip-shaped light source, can be the light source for the strip being arranged in by multiple small sub-light sources, one can also be included The illuminator of shape.

When touching touch pad without touching part, the light that light-sensitive element receives is weaker, the light intensity on touch pad More uniformly, in the absence of luminous point；When being touched with touch part to touch pad, light forms luminous point on a touchpad.Luminous point with Touch the movement of part and move, so as to by information such as the presence or absence of the movements of luminous point, luminous point, realize that touch part touches to dual camera Touch the touch operation of screen system.

Luminous point principle is formed when contacting with touch pad to touch part to illustrate, and proof is provided：

When touching part from touch pad farther out, only a small amount of light is radiated on touch part in the light appeared by touch pad, Wherein and only small part light is reflected back touch pad again, and the light being reflected back is not concentrated, it is impossible to forms luminous point, double shootings Head touch-screen system is not responding to.Touch pad can not be projected by touching light when part contacts with touch pad, directly touch part with touching Plate contact position forms luminous point.The present invention obtains the luminous point by comparing luminous point distance of each light-sensitive element into light-sensitive element group Position, even if the larger determination for nor affecting on double-camera touch screen system to its position of the area of luminous point.

The correctness of above-mentioned principle is proved with a simple empirical experiment：It is dark night, brighter in light The things of outside surface of glass window is not almost seen in room, the glass of windowpane is as minute surface.Assuming that have a people outside windowpane, He from windowpane farther out when, even if the light that windowpane appears can be irradiated to this people, we can not see him, this proof The light that windowpane projects reflects seldom.When nose is pressed on glass by he, we can be appreciated that his nose is very bright, A luminous point is formed, other positions of face are drastically dimmed with the increase of distance between glass.

Above-mentioned simple empirical experiment is contrasted with the present invention：Producing strip-shaped light source has certain flicker frequency The optical signal of rate, the frequency-selecting module of signal processing system only choose the electric signal related to strip-shaped light source flicker frequency, i.e., double to take the photograph The light as caused by head touch-screen system only identifies strip-shaped light source, relative to double-camera touch screen system, the outside of touch pad It is dark, is all consistent with the condition in above-mentioned empirical experiment.Therefore can be to touch part analogy nose, touch pad class Than the glass of windowpane, light-sensitive element analogy eyes, this, which proves to touch when part touches touch pad, can form a luminous point.

Plural bar strip-shaped light source, while when projecting light, the light that touch pad projects is difficult uniform, it is possible to have influence on pair The determination of light spot position.

It is uniform can so to solve the problems, such as that light is difficult to, the optical signal that a strip-shaped light source projects is corresponding Light-sensitive element is converted into corresponding electric signal and is sent to signal processing system, signal processing system using the corresponding electric signal as Obtain the location dependent information of the luminous point on a touchpad.Light-sensitive element corresponding with other strip-shaped light sources can not be by this The optical signal that strip-shaped light source projects is sent to signal processing system, or light-sensitive element corresponding with other strip-shaped light sources can be by this The optical signal that one strip-shaped light source projects is sent to signal processing system, but signal processing system is not made the corresponding electric signal To obtain the location dependent information of the luminous point on a touchpad.

It is uniform specifically can to solve the problems, such as that light is difficult in the following way：The plural bar strip-shaped light source is alternately lighted, When wherein a strip-shaped light source is not lighted, the electric signal of corresponding light-sensitive element group output is not received.One strip During light source igniting, the electric signal of corresponding light-sensitive element group output is received and handled by signal processing system.It is so each What light-sensitive element group received is all the light that strip-shaped light source projects, and the light that a strip-shaped light source projects be easy to it is equal Even projection is on a touchpad.

It is uniform specifically can also to solve the problems, such as that light is difficult in the following way：Plural bar strip-shaped light source, with each strip Light source is provided with light-sensitive element to deserved；Each strip-shaped light source has the flicker frequency for differing larger respectively；It is corresponding with each strip-shaped light source Each light-sensitive element connect frequency-selecting module corresponding with the strip-shaped light source flicker frequency respectively.

（3）Double-camera touch screen system has light source, the extraneous device with the collocation of double-camera touch screen system in itself Also there is light source：

Realize that double-camera touch screen system has light source, the extraneous device with the collocation of double-camera touch screen system in itself Part also has a case that light source, as long as to the double-camera touch screen system outfit itself with light source and double-camera touch screen The device with light source that system collocation uses, you can while there is both of which.Close double-camera touch screen system in itself Light source, double-camera touch screen system be double-camera touch screen system in itself do not have light source pattern；Open double shootings The light source of head touch-screen system in itself, double-camera touch screen system are the mould that double-camera touch screen system has light source in itself Formula.

2nd, the double-camera touch screen system of remote touch

Need to be used cooperatively with the device that the collocation of the double-camera touch screen system of remote touch uses.The device that collocation uses Part, such as remote touch pen.

Remote touch pen includes laser, power supply, in addition to one is easy to hand-held shell, and the laser, power supply are set In shell, switch is provided between the laser and the power supply, the switch is set on the housing.

Further, remote touch pen also includes a signal generating module, power supply connection signal generating module, and mould occurs for signal Block connecting laser, signal generating module produce the electric signal of vibration, and drive laser to send the sudden strain of a muscle corresponding with electric signal Bright laser signal.

Remote touch pen produces light beam, and the light beam forms a luminous point on a touchpad.Remote touch pen is by remotely controlling Luminous point processed, corresponding remote operation is realized to double-camera touch screen system.

The double-camera touch screen System Working Principle and structure of remote touch touch with the dual camera that contact touches The form without light source is essentially identical in itself for screen system, and difference focuses on remote touch pen, and can to produce a light intensity stronger Light beam, when from touch pad farther out, you can form luminous point on a touchpad.Therefore by the way that remote touch pen is replaced by into contact Felt pen, can be by the system converting double-camera touch screen system touched for contact of the double-camera touch screen of remote touch System, vice versa.Between the double-camera touch screen system that the double-camera touch screen system and contact of remote touch touch Can easily it be converted.

The setting of light-sensitive element is more free in the light-sensitive element group of remote touch, before being arranged on screen Side, the front of protective plate can also be arranged on.

Remote touch pen and contact felt pen, it can be entered by the optical signal of flicker with double-camera touch screen system Row communication, one coding lock system is set to double-camera touch screen system, to contact felt pen and the signal of remote touch pen Module occurs one supporting electron key system is set.Double-camera touch screen system is realized and locked, prevents irrelevant personnel Operation.

As shown in the above, heretofore described double-camera touch screen system, during use not with double shootings The electronic device contact of head touch-screen system in itself, so service life is grown.Touch pad uses the original part of display, does not account for Use space.Remote touch is not only realized, can also easily realize and turn between remote touch pattern and contact touch mode Change.The determination of the position of luminous point is only relevant with the position of luminous point, and it is unrelated to whether there is greasy dirt in the power, touch pad with luminous point light intensity. So strong antijamming capability, greasy dirt is not afraid of, suitable for the heavier occasion of the greasy dirts such as factory floor, mining area.The double of remote touch take the photograph As can easily be converted between head touch-screen system and the double-camera touch screen system of contact touch, and it is easy to Encryption.Allow multiple luminous points be present, it is possible to achieve multi-touch function.

Brief description of the drawings

A is contact felt pen overall diagram in Fig. 1, and b is contact felt pen electrical schematic diagram；

A is remote touch pen overall diagram in Fig. 2, and b is remote touch pen electrical schematic diagram；

Fig. 3 is the front view and lateral plan of the remote touch pen of the fixed structure with a ring shape；

Fig. 4 is the lateral plan of the remote touch pen of the fixed structure with two ring shape；

Fig. 5 is the touch pad structure chart that two row's light-sensitive elements are provided with specific embodiment one；

Fig. 6 is light-filtering channels structure chart；

A is light-sensitive element and signal processing system connection relationship diagram in Fig. 7, and b is to improve double-camera touch screen The light-sensitive element of systemic resolution and signal processing system connection relationship diagram；

A is lateral coordinates region division schematic diagram in Fig. 8, and b is the horizontal stroke for improving double-camera touch screen systemic resolution Schematic diagram is divided to coordinates regional；

Fig. 9 is the schematic diagram of the coordinates regional for the square that lateral coordinates region is surrendered with longitudinal coordinate region；

Figure 10 is that light source is arranged on the structural representation for touching back；

Figure 11 is the structural representation that light source is arranged on touch pad side；

Figure 12 is light-sensitive element arrangement schematic diagram when touch plate suqare is larger；

Figure 13 is photosensitive member when touch pad is the screen for the large screen back projection formula display being spliced to form by multiple the small screen Part arrangement schematic diagram；

Figure 14 is photosensitive arrangement of elements schematic diagram when touch pad is the screen of light-emitting diode display；

Figure 15 uses the coordinates regional division schematic diagram of light-sensitive element group of the front equipped with plus lens.

Embodiment

In order that the technical means, the inventive features, the objects and the advantages of the present invention are easy to understand, tie below Conjunction is specifically illustrating, and the present invention is expanded on further.

The double-camera touch screen system and the work of the double-camera touch screen system of remote touch touched due to contact Make principle and structure is essentially identical, difference focuses on the generation type of the luminous point, and forming the mode of luminous point includes leading to Cross contact felt pen form luminous point, form luminous point by remote touch pen, forming luminous point by touching part, the touch part is The object of touch-screen system is touched, the object can not light, and can be finger, pen etc..

Contact felt pen or the touch part is selected to be used with double-camera touch screen system support, or selection is long-range Felt pen uses with double-camera touch screen system support, largely can directly determine the double-camera touch screen system It is the double-camera touch screen system of contact touch or the double-camera touch screen system of remote touch.

Contact felt pen, the concrete structure of remote touch pen are as described below.

A and b in reference picture 1, contact felt pen, including a shell 101, power supply 102, switch 103 and light-emitting component 104, Light-emitting component 104 connects power supply 102, the luminous member of the control of switch 103 by producing the signal generating module 105 of the electric signal of vibration The luminous situation of part 104.The light-emitting component 104 can be launched the light-emitting component of visible ray or launch invisible The light-emitting component of light.Power supply 102 can also directly pass through the connection light-emitting component 104 of switch 103.

Light-emitting component 104 uses light emitting diode, and light emitting diode is located at the contact jaw of a shell 101 and touch pad, lights Diode upper end props up the button of switch 103.

Touch pad is touched using light emitting diode during contact felt pen, light emitting diode is under pressure trigger switch 103 Button, light-emitting component lights, and forms luminous point on a touchpad.The luminous point is corresponding with switch 103 with signal generating module 105 Frequency scintillation.Switch 103 obviously can also be that the switch of pressure sensor form, or the known of some other small size are opened Close.

Contact felt pen can also set up modifier key, such as button 106.Signal generating module 105 is provided with and button 106 Corresponding frequency.Push button 106, when light emitting diode touches touch pad ON switch 103 light-emitting component 104 with button Frequency scintillation corresponding to 106.Double-camera touch screen system can be to using the optical response signal of the frequency scintillation as click mouse Right button function.Similarly, the button corresponding to left mouse button can also be set.

Contact felt pen obviously can be integrated with the radio function of existing laser pen, infrared function, such as pass through Radio function, infrared function, which are realized, to be clicked on functions of mouse right key, clicks on functions of mouse right key and lantern slide page-turning function.

The power supply 102 of contact felt pen can be charge power supply.Shell 101 is provided with charging inlet, is easy to contact Felt pen charges.

Contact felt pen is applied to such as be applied to mobile phone, palm PC, handheld device, pen during portable electric appts When remembering this computer etc., portable electric appts are provided with contact felt pen slot, and charging electricity is provided with contact felt pen slot Pole, when contact felt pen is inserted in contact felt pen slot, the charging inlet docks with charging electrode, to charge power supply Charging.

Remote touch pen is used to produce light beam, and the light beam forms luminous point on a touchpad.Remote touch pen is by remotely controlling Luminous point processed, corresponding remote operation is realized to double-camera touch screen system.A and b in reference picture 2, remote touch pen include swashing Light device 201, power supply 202, shell 203, have switch sections 204 on shell 203, and tool power supply 202 in shell 203, power supply 202 connects Signal generating module 205, the connecting laser 201 of signal generating module 205 are connect, signal generating module 205 produces the telecommunications of vibration Number, and drive laser 201 to send the laser signal of the flicker corresponding with electric signal, and then in double-camera touch screen system The upper luminous point for forming flicker.Laser 201 can be the laser for launching visible ray or the laser for launching black light Device.

Switch sections 204 are provided with multiple buttons, and each button corresponds to unlike signal caused by signal generating module 205, because This remote touch pen can produce a variety of laser signals with different information.The power supply of remote touch pen can be charging electricity Source.

Another structure of remote touch pen, reference picture 3, laser share two 301,302, and laser 301 is launched visible Light, laser 302 launch infrared ray, the light ray parallel that two lasers 301,302 are sent.It is anti-that luminous ray behaviour provides vision Feedback, infrared light have compared with the more preferable anti-interference of visible ray as signal vehicle.

Signal generating module can produce a variety of electric signals, press key connection with switch 303, having three on switch 303 presses Key, each button are corresponding with a kind of electric signal.Laser signal corresponding to every kind of electric signal driving laser generation.

There is the fixed structure 304 of ring shape on the shell 300 of felt pen.Felt pen can be consolidated by fixed structure 304 It is scheduled on finger, produces the luminous point for following finger movement.Felt pen can be worn on right hand forefinger, with thumb control button 303.Because people's ordinary practice refers to thing using right hand forefinger and made a gesture.The forefinger of the right hand has good sense of direction, hand All this point is being utilized in the design of rifle always.

Yet another structure of remote touch pen, reference picture 4 is more comfortable in order to allow people to use, and is carried out on shell Change as follows, fixed structure 401,402 of the shell provided with two ring shape, by leading between two fixed structures 401,402 Line 403 connects, the laser equipped with transmitting infrared ray on fixed structure 401, on another fixed structure 402 equipped with switch 404, Power supply, signal generating module, signal amplification module.

The fixed structure 401 equipped with laser, is worn on forefinger during use, during the fixed structure 402 equipped with switch is worn over On finger, the direction of illumination of laser switchs 404 button towards thumb towards finger tip.With the button of thumb control switches 404, Laser projects laser to the direction that forefinger points to.The action of forefinger drives laser action, and then manipulates the action of luminous point.

Remote touch pen obviously can also be integrated with the radio function of existing laser pen, infrared function, such as pass through Radio function, infrared function, which are realized, to be clicked on functions of mouse right key, clicks on functions of mouse right key and lantern slide page-turning function.

For the present invention, the simple generation type according to luminous point, double-camera touch screen system is divided into contact and touched The double-camera touch screen system and the double-camera touch screen system of remote touch touched, are easy to briefly explain, but be not easy into Row explanation in detail.The different type of touch pad selected by Main Basiss below, and the placement of the light-sensitive element on a touchpad Method carries out classifying explanation in detail.

When in the present invention using protective plate as touch pad, the mounting means of the light-sensitive element has higher freedom, The producing method of luminous point also has highest freedom, therefore is illustrated first by touch pad of protective plate.In addition to prevent On architecture basics and basis of the backplate for the double-camera touch screen system of touch pad, can easily it obtain with other Object is the double-camera touch screen system of touch pad.Double-camera touch screen system using other objects as touch pad, then By protective plate to be illustrated based on the double-camera touch screen system of touch pad.

Specific embodiment one, using the protective plate of printing opacity before screen as touch pad：

The situation that herein below emphasis is not provided with plus lens using light-sensitive element group is told about as emphasis.For being substituted for The situation of light-sensitive element group provided with plus lens, before told about, no longer excessively in detail explanation.

Light-sensitive element group is arranged on around touch pad.Around touch pad, including touch front, rear and the side on edges of boards Face.Specifically, reference picture 5, the top of touch pad 501 is provided with the light-sensitive element group of the transversely arranged light-sensitive element composition of a row 502, left is provided with the light-sensitive element group 503 that the light-sensitive element of row's longitudinal arrangement forms.Light-sensitive element group 502, light-sensitive element Group 503 can be arranged on the front of touch pad 501, can be arranged on the rear of touch pad 501, can also be embedded in touch pad in advance Inside 501.

Light-sensitive element is the narrower light-sensitive element of applicable wavelengths scope, utilizes the light-sensitive element choosing to wavelength of optical signal in itself Selecting property, eliminate the interference of other wavelength channels.Uv-sensitive component, infrared optical sensor such as can be selected.

In the present embodiment, the light-sensitive element group 502, light-sensitive element group 503 use infrared optical sensor, such as can be selected red Outer photodiode, infrared phototriode, light-sensitive element integrated package, or imaging sensor.

Filter glass can also effectively further eliminate it on light-sensitive element group 502, the radiator grille of light-sensitive element group 503 The interference of his wavelength channels.Reference picture 6, light-shielding structure is also provided with light-sensitive element group, and the light-shielding structure is used to hide Keep off irrelevant direction and penetrate the light come.The irrelevant direction, refer to the direction unrelated with the control of double-camera touch screen system, Generally refer to the direction in addition to towards touch pad.For this purpose, light-shielding structure can be with flexible design, Ke Yishi The simple anti-dazzling screen above or below light-sensitive element or more complicated structure.

Such as, light-shielding structure uses light-filtering channels 600 to more complicated structure, by the material of translucency difference in light-sensitive element group upper cover Light-filtering channels 600 made of material, for filtering out the light of directive light-sensitive element beyond touch pad 501.As light-filtering channels can be used Opaque plastic material is made.Be provided with elongated light-transmitting opening 601 on light-filtering channels 600, light-sensitive element group 502 be arranged in away from Light-transmitting opening 601 has the position of certain distance.

Light-transmitting opening 601 is slightly towards touch pad 501.The angle of the direction of light-transmitting opening 601 and touch pad 501 is with touch pad The increase of 501 width on the direction of light-transmitting opening 601 and reduce, so as to receive on touch pad 501 try one's best it is big Optical signal on the even whole touch pad 501 of the optical signal of area.Light on touch pad 501 reaches light through light-transmitting opening 601 Quick element group 502.Most of light beyond touch pad 501 is blocked by light-filtering channels 600.Filter glass may be mounted at printing opacity On mouth 601.

Reference picture 5, the light-sensitive element group formed using the transversely arranged light-sensitive element of the row above touch pad 502, determine the abscissa of luminous point；The light-sensitive element formed using the light-sensitive element of row's longitudinal arrangement mounted in touch pad left Group 503, determines the ordinate of luminous point, and then the position of luminous point on touch pad is determined by two row's light-sensitive elements.

One row's light-sensitive element is to the determination method of the wherein one-dimensional coordinate of luminous point, with transversely arranged light-sensitive element group 502 Exemplified by be described as follows：

A in reference picture 7, the light-sensitive element serial number to transversely arranged light-sensitive element group 502 is light-sensitive element 000th, 001,010,011,100, difference module is sought in the output end connection for connecting frequency-selecting 700,5 frequency-selecting modules 700 of module respectively 701, ask difference module 701 to include 4 operational amplifiers 702, the electric signal exported to 5 frequency-selecting modules 700 asks poor two-by-two successively.

The output end of operational amplifier 702 connects microprocessor system 703, and microprocessor system 703 is according to each computing The difference of the output signal of amplifier 702, is converted to corresponding data signal.

The light intensity that the light-sensitive element that microprocessor system 703 is connected with each left side of operational amplifier 702 is subject to is stronger Caused electric signal is " 1 ", otherwise is " 0 ", and by precedence arrangement data from left to right.And then by the region where luminous point It is divided into the coordinates regional 1111,0111,0011,0001,0000 as shown in a in Fig. 8.

The raising of double-camera touch screen systemic resolution obviously can be achieved by increasing light-sensitive element quantity.Ginseng According to the figure b in Fig. 7, the raising of double-camera touch screen systemic resolution can also be by increasing the number of operational amplifier 702 Amount, carries out asking poor, to the further subdivision of coordinates regional, to reach to electric signal caused by alternate light-sensitive element group 502 again Put forward high-resolution effect.To the coordinates regional 1111,0111,0011,0001,0000 shown in a in Fig. 8, it is further subdivided into Coordinates regional in Fig. 8 shown in b, be followed successively by 11111 from left to right, 11110,01111,01110,00111,00110,00011, 00010、00001、00000。

Double-camera touch screen systemic resolution is improved, can also be by entering to electrical signal intensity caused by each light-sensitive element Row A/D is changed, and is converted into after digital information to be compared to each other and is achieved.Its principle and the principle realized above by integrated transporting discharging Similar, difference is that one is compared by hardware, and one is compared by software.

Reference picture 9, the region and the light-sensitive element group 503 of longitudinal arrangement that transversely arranged light-sensitive element group 502 marks off The region marked off, intersects to form the coordinates regional of square, and the coordinates regional of each square represents different digital information. When luminous point is positioned at the coordinates regional of square, double-camera touch screen system reflects that the coordinates regional of the square represents Digital information, obtain the position of luminous point.

The above method is limited by hardware facility, and resolution ratio easily reaches the limit.B in reference picture 8, illustrate a kind of profit High-resolution method is put forward with analog quantity.

Using analog quantity carry high-resolution method based on b in Fig. 8 shown in hardware device, pass through software improve differentiate Rate.

High-resolution method is put forward using software, based on following thought：Luminous point on touch pad 501 when moving, its light intensity Smooth change, if luminous point, when across coordinates regional 11110, transversely arranged two corresponding with coordinates regional 11110 photosensitive Element, the differential intensity of light value changes reflected are β, then laterally across the coordinates regional adjacent with coordinates regional 11110 When 01111, two transversely arranged light-sensitive elements corresponding with coordinates regional 01111, the differential intensity of light value changes reflected For Ф, Ф=β+Δ, if Δ can be neglected.

The multiplication constant on an axis of abscissas is set as n, the abscissa length of a coordinates regional is l.When luminous point position When in coordinates regional 01111, using differential intensity of light value changes β of luminous point when across coordinates regional 11110 as reference.Sitting Two transversely arranged light-sensitive elements corresponding with coordinates regional 01111 in region 01111 are marked, the light intensity reflected often becomes ChangeIt is considered as luminous point to move on the horizontal scale, can be by coordinates regional by the above method because Δ can be neglected 01111 is divided into n parts, i.e., the resolution ratio on 01111 abscissa is increased into n times.When luminous point is by coordinates regional 01111, entrance Adjacent coordinates regional, such as coordinates regional 01110, coordinates regional 00111, then with luminous point when across coordinates regional 01111 Differential intensity of light value changes Ф is reference.It is also n to assume again that the multiplication constant on axis of ordinates, then whole double-camera touch screen The resolution ratio of system will rise to original n²Times.

It is summarized as：The double-camera touch screen system includes row's light-sensitive element, and the row light-sensitive element is according to it Position relationship, touch pad is divided into a plurality of coordinates regionals；Signal processing system records the luminous point from a Ge Yuan coordinates area Domain side is moved to light intensity difference caused by opposite side and is set to β；When luminous point moves to adjacent coordinates region, by adjacent coordinates area Domain light intensity situation of change is compared with β, and according to adjacent coordinates peak width and former coordinates regional wide association, it is determined that Position of the luminous point on adjacent coordinates region.

The measurement and calculating of above-mentioned light intensity difference are carried out, can be by the way that first light intensity difference be turned by A/D Change and be converted into digital information, digital information is carried out according to above-mentioned formula and method by software by microprocessor system Reason.

Reference picture 15, for the light-sensitive element group 502 being made up of rows of light-sensitive element and light shown in Fig. 8 and Fig. 9 Quick element group 503, plus lens 510, the light-sensitive element group 502 of plus lens 520 and photosensitive member can be housed in front of two use Part group 503 replaces.Signal processing system, to deserved using by between luminous point and light-sensitive element group 502 and light-sensitive element group 503 Angular relationship obtains the signal processing system of the position of luminous point.Two kinds of signal processing systems mentioned in the present invention, can lead to Cross and judge including the strength information of electric signal related to luminous point caused by a plurality of light-sensitive elements in light-sensitive element group Information, determine the position of luminous point.It is determined that one or several light-sensitive elements that caused associated electrical signals intensity is most strong, are true Determine the key of light spot position.Therefore the above-mentioned summary conclusion that high-resolution method is put forward using software, is equally applicable to, passes through light Angular relationship between point and light-sensitive element group obtains the signal processing system of the position of luminous point.Signal processing system by luminous point with When angular relationship between light-sensitive element group 502 and light-sensitive element group 503 obtains the position of luminous point, then to photosensitive in light-sensitive element group The difference relationship of light signal strength on element is analyzed, and is favorably improved precision.Signal processing system when specifically used, will Reference coordinate is modified to polar coordinates, then corresponding coordinate value is carried out in microprocessor system with relevant information it is corresponding, It can obtain required signal processing system.Therefore no longer describe in detail.

Remote touch pen can be selected during use, contact felt pen can also be selected.For two kinds of touches in the present invention The difference of pen, it is preferred that emphasis is the producing method of luminous point is different.

During using contact felt pen, if touch pad 501 is kept flat on the table, only the tip of the brushstyle of a writing or painting of contact felt pen is with touching Template 501 can just produce response when contacting.This effect is suitable with the effect write on paper.

Following designs make the present embodiment realization be operated with non-luminous touch part：

Operated in the present embodiment according to non-luminous touch part, then need to increase a set of double-camera touch screen system System light source.The light source of double-camera touch screen system source can from the back side of touch pad 501 or side it is more uniform be radiated at it is tactile In template 501.Light caused by light source is more uniform to be projected from the front of touch pad 501.

Part contact touch pad 501 is touched using one, part is touched and is irradiated by light caused by light source, form luminous point.Touch It is the object for touching touch pad 501 to touch part, can be finger, pen etc..

Luminous point moves with the movement for touching part, passes through the flicker frequency of the presence or absence of the movement of luminous point, luminous point, and luminous point Touch operation of the part to double-camera touch screen system is touched Deng information realization.

Reference picture 10, light source 101a can be arranged on the back side of touch pad 501；Reference picture 11, light source 101b can also be set In the side of touch pad 501.

Reference picture 10, light source 101a are two strip-shaped light sources, the strip-shaped light source, can include the luminous of strip The light source of body or the strip being arranged in by multiple small sub-light sources.The back side of touch pad 501 is arranged on, direction of illumination is Slightly towards the front of touch pad 501.Light-sensitive element group 502, light-sensitive element group 503 are arranged on the back side of touch pad 501, and photosurface is micro- It is micro- towards the front of touch pad 501.The photosurface for trying not to make light-sensitive element group 502, light-sensitive element group 503 is by light source 101a Direct irradiation.

Reference picture 11, light source 101b are two strip-shaped light sources, the strip-shaped light source, can include the luminous of strip The light source of body or the strip being arranged in by multiple small sub-light sources.The side of touch pad 501 is arranged on, is embedded in protection Plate（Touch pad 501）Inside, direction of illumination is slightly towards the front of touch pad 501.Light-sensitive element group 503, light-sensitive element group 502 （Not shown in Figure 11）Touch pad side is arranged on, is embedded in protective plate（Touch pad 501）Inside, photosurface are oriented pico- court To the front of touch pad 501.The photosurface for trying not to make light-sensitive element group 502, light-sensitive element group 503 is by the straight of light source 101b Connect irradiation.

Two strip-shaped light sources in Figure 10 and Figure 11, while when projecting light, the light that touch pad 501 projects is difficult equal It is even, influence whether the determination to light spot position.

It is uniform to solve the problems, such as that light is difficult in the following way, two strip-shaped light sources are alternately lighted, a strip-shaped light source point When bright, the electric signal of corresponding row light-sensitive element output is not received.So often arrange light-sensitive element reception is all only It is the light that corresponding strip-shaped light source projects, and the light that a strip-shaped light source projects is easy to uniformly be incident upon touch pad On, so as to solve above mentioned problem.

It is uniform can also to solve the problems, such as that light is difficult in the following way, two strip-shaped light sources select to differ larger respectively Flicker frequency, corresponding two rows light-sensitive element connects frequency-selecting mould corresponding with each bar strip light source scintillation frequency respectively Block, so as to solve above mentioned problem.

Reference picture 10 and Figure 11, when touch part does not touch to touch pad 501, light source 101a or light source 101b productions Raw light only has seldom partial illumination to light-sensitive element group 502 and light-sensitive element group 503.It is photosensitive due to not forming luminous point The uniform light that element group 502 and light-sensitive element group 503 receive, operational amplifier can not compare each light-sensitive element and receive Light obvious difference, react for no generation touch event.

When touch part touches to touch pad 501, luminous point, light source 101a or light source are produced on touch pad 501 Light is reflected back caused by 101b, and light has diffusing reflection in reflection, is irradiated to light-sensitive element group 502 and light-sensitive element Group 503.The light that each light-sensitive element receives is uneven, the light that operational amplifier is received by more each light-sensitive element Difference, reflect corresponding touch event.

Following designs solve the problems, such as potential when the present embodiment uses the larger protective plate of area as touch pad：

Reference picture 12, when the area of touch pad 501 is larger, light-sensitive element group may not receive positioned at touch pad well The signal of luminous point on 501 everywhere.To solve the above problems, using the design described in Figure 12, by touch pad 501 4 Week fills light-sensitive element, and one piece of touch pad 501 is divided into four pieces of sub- touch pad 12a, 12b, 12c, 12d.By being touched to four pieces of sons Light-sensitive element group Unified coding in template, four pieces of sub- touch pads are combined, so as to which sensitivity be improved.

Following system safety problems designed for solution the present embodiment：

With setting signal module can occur for reference picture 1b, Fig. 2, Fig. 3, Fig. 4, contact felt pen and remote touch pen, And electric signal caused by signal generating module is converted into optical signal and sends double-camera touch screen system to.Touched to dual camera Touch screen system and one coding lock system is set, it is supporting to the setting one of the signal generating module of contact felt pen and remote touch pen Electron key system.Only supporting contact felt pen and remote touch pen is set to operate double-camera touch screen system, Be advantageous to system safety.

In order to increase the versatility of contact felt pen and remote touch pen, i.e., in order that a contact felt pen or remote Journey felt pen can operate multiple double-camera touch screen systems, and signal generating module can be made to include multigroup unlocking information.Connect Touch felt pen or remote touch pen, send and carry the optical signal of multigroup unlocking information to double-camera touch screen system, its In one group of unlocking information meet the unlocking requirements of double-camera touch screen system and can complete to unlock.

One group of unlocking information can be included in digital information in carrier wave or with frequency oscillation and specific frequency Signal.

Contact felt pen and remote touch pen are constantly sent to double-camera touch screen system when in use to be carried The optical signal of multigroup unlocking information, produce luminous point.Double-camera touch screen system is to carry the optical signal of multigroup unlocking information Caused luminous point is related luminous point.

In order to easy to use, multigroup unlocking information that signal generating module includes should be easy to user voluntarily to update.Cause This signal generating module, which should be provided with, can edit the function of unlocking information in good time, and the function can be by by signal generating module and one Flash memory communication connection is realized.

Specific embodiment two, using the screen of projecting display as touch pad：

Referring to figs. 1 to Fig. 9, double-camera touch screen system using the screen of projecting display as touch pad 501 with to prevent Backplate is touch pad 501, and structure and principle are essentially identical.

One of difference, if the screen of projecting display is not transparent medium, light can not be in projecting display Inside screen ordered propagation, operated so being not easy to realize with non-luminous touch part.

The two of difference, the screen of projecting display is generally large, to ensure that the optical signal projected at luminous point can be smooth Receive, it is necessary to further design.

The screen of existing large screen back projection formula display is typically spliced to form by multiple the small screen.Reference picture 13, large-size screen monitors The screen of curtain projecting display（Touch pad 501）It is spliced to form by 4 the small screen 13a, 13b, 13c, 13d.Depending on the small screen 13a, 13b, 13c, 13d are sub- touch pad, and every sub- touch pad uses structure as shown in figure 12, by every sub- touch pad again It is secondary to be divided into 4 small sub- touch pads, so as to which touch pad 501 is divided into 16 sub- touch pads.

Light-sensitive element is arranged on to the screen of large screen back projection formula display（Touch pad 501）The back side, in order to avoid influence regard Feel effect.

Specific embodiment three, tube display shown with liquid crystal display equipment screen or negative electrode（CRT）Screen is touch pad：

Referring to figs. 1 to Fig. 9, and Figure 11 and Figure 12, double-camera touch screen system is using liquid crystal display equipment screen as touch Plate 501 shows tube display with negative electrode（CRT）Screen is touch pad 501, and using protective plate as touch pad 501, structure and original Manage essentially identical.

Difference：Liquid crystal display equipment screen and negative electrode show tube display（CRT）Screen relative to protective plate difference Part, it is that liquid crystal display equipment screen and negative electrode show tube display（CRT）Translucency between the front and rear two sides of screen is bad, I.e. light is not easy penetrating LCD device screen and negative electrode shows tube display（CRT）Screen.Light-sensitive element group 502, light-sensitive element Group 503 is suitably arranged on the side of touch pad 501, or above.

When realizing the present embodiment to be operated with non-luminous touch part, should not use structure as shown in Figure 10, it is suitable Preferably use structure as shown in figure 11.

Specific embodiment four, using the screen of light-emitting diode display as touch pad：

Referring to figs. 1 to Fig. 9, and Figure 12, double-camera touch screen system is using the screen of light-emitting diode display as touch pad 501 With using protective plate as touch pad 501, structure and principle are essentially identical.

One of difference, the screen of light-emitting diode display are the screen of light-emitting diode display relative to the difference of protective plate Translucency between front and rear two sides is bad, i.e., light is not easy to penetrate the screen of light-emitting diode display.Light-sensitive element group 502, light-sensitive element group 503 are suitably arranged on before touch pad 501.

Reference picture 14, the screens of most light-emitting diode displays are formed by substantial amounts of single led 141, light-sensitive element group 502, photosensitive Element group 503 can also be arranged between substantial amounts of single led 141, i.e., light sensor is embedded in touch pad.Due to photosensitive member Part group 502, the small volume of light-sensitive element group 503, and transparent do not interfere with visual effect.Light-sensitive element group 502, light-sensitive element group 503 are arranged between substantial amounts of single led 141, are easy to increase light-sensitive element group 502, the quantity of light-sensitive element group 503, Jin Erzeng Add the accuracy of double-camera touch screen system.For the ease of receiving optical signal, light-sensitive element group 502, light-sensitive element group 503 The height of photosurface should be higher than that single led 141 height.

For the touch pad that other fronts are transparent, light-sensitive element can also be used to be embedded in the structure inside touch pad, such as The liquid crystal display equipment screen of giant-screen, light-sensitive element group 502, light-sensitive element group 503 can also be embedded in as the big of touch pad In the liquid crystal display equipment screen of screen.Due to light-sensitive element group 502, the small volume of light-sensitive element group 503, and transparent do not interfere with Visual effect.Such structure is compacter, stably.

The two of difference, light can not be in the inside screen ordered propagations of light-emitting diode display, so being not easy to realize with not lighting Touch part operated.

Specific embodiment five, using projecting apparatus screen as touch pad：

Referring to figs. 1 to Fig. 9, and Figure 12, double-camera touch screen system using projecting apparatus screen as touch pad 501 with to prevent Backplate is touch pad 501, and structure and principle are essentially identical.

Difference, projecting apparatus screen are not transparent mediums, light can not projecting display inside screen it is orderly Propagate, operated so being not easy to realize with non-luminous touch part.Light-sensitive element group 502, light-sensitive element group 503 are suitably set Put in projecting apparatus screen front or behind.

The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The technology of the industry For personnel it should be appreciated that the present invention is not limited by above-mentioned application method, described in above-mentioned application method and specification is to say Bright principle of the invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, this A little changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims And its equivalent thereof.

Claims

1. double-camera touch screen system, including touch pad, signal processing system, in addition to light-sensitive element group, the photosensitive member Part group includes a plurality of light-sensitive elements, and a plurality of light-sensitive elements connect signal processing system；Characterized in that,

During using double-camera touch screen system, a related luminous point is presented on a touchpad, light-sensitive element is by from described The irradiation of the light of luminous point, it is reflected as the electric signal of correlation；

A plus lens is provided with front of the light-sensitive element group；By plus lens by light collection to the light-sensitive element group On photosurface；

A related luminous point is presented on a touchpad, light-sensitive element group is irradiated by the light from the luminous point, is reflected as Related electric signal, the intensity and the distance dependent of light-sensitive element to the luminous point of the electric signal；It is electric caused by light-sensitive element Signal is sent to signal processing system, and signal processing system is by analyzing a plurality of electric signals caused by a plurality of light-sensitive elements Information including intensity, obtain the positional information of the luminous point on a touchpad；

The light-sensitive element of two row's cross arrangements is the position that can determine that luminous point:

The transversely arranged light-sensitive element of one row, by electric signal difference relationship related caused by each light-sensitive element, determine luminous point Lateral coordinates；The light-sensitive element of one row's longitudinal arrangement, by electric signal difference relationship related caused by each light-sensitive element, really The longitudinal coordinate of luminous point is determined, so that it is determined that the position of luminous point on a touchpad.

2. double-camera touch screen system according to claim 1, it is characterised in that plus lens by luminous point clearly as It is presented on photosurface or simply by the light irradiation by converging of luminous point on photosurface, is not necessarily intended to be imaged.

3. double-camera touch screen system according to claim 1, it is characterised in that described after employing plus lens Caused electric signal in light-sensitive element group, it is relevant relative to the distance and angle of the light-sensitive element group with luminous point.

4. double-camera touch screen system according to claim 3, it is characterised in that the signal processing system processing light With having in the information of distance dependent, processing electric signal with angle in caused electric signal in quick element group, including processing electric signal The information of pass or integrated treatment.

5. double-camera touch screen system according to claim 1, it is characterised in that light-sensitive element group passes through a plurality of only Vertical light-sensitive element sequential combination forms.

6. double-camera touch screen system according to claim 1, it is characterised in that be integrated in a plurality of light-sensitive elements On one integrated package.

7. double-camera touch screen system according to claim 1, it is characterised in that use and be integrated with a large amount of light-sensitive elements Imaging sensor.

8. double-camera touch screen system according to claim 1, it is characterised in that the luminous point is selected with certain frequency The luminous point of flicker, signal processing system include a frequency-selecting module corresponding with the luminous point flicker frequency.

9. the double-camera touch screen system according to any one in claim 1-8, it is characterised in that on a touchpad The luminous point by double-camera touch screen system identification presented, it is believed that be the luminous point related to double-camera touch screen system.

10. double-camera touch screen system according to claim 9, it is characterised in that related luminous point needs to meet, dodged Bright frequency is corresponding with the frequency-selecting module of double-camera touch screen system, the wavelength of light of luminous point and the reception wavelength pair of light-sensitive element Should.

11. the double-camera touch screen system according to any one in claim 1-8, it is characterised in that signal transacting System, the position of the luminous point, distance are obtained by comparing luminous point distance difference relation of light-sensitive element into light-sensitive element group The difference of the light signal strength from the luminous point that is received by each light-sensitive element of difference reflected.

12. the double-camera touch screen system according to any one in claim 1-8, it is characterised in that by touching In the light of plate, at least Ray Of Light passes through light-sensitive element.

13. the double-camera touch screen system according to any one in claim 1-8, it is characterised in that signal transacting System, the position of the luminous point is obtained by the angular relationship between luminous point and light-sensitive element group.

14. double-camera touch screen system according to claim 13, it is characterised in that angular relationship passes through plus lens The position that the optical signal of the luminous point is converged in light-sensitive element group is reflected.

15. double-camera touch screen system according to claim 14, it is characterised in that two groups of light with plus lens Quick element group determines the position of luminous point:

One light-sensitive element group determines a polar coordinates relevant with angle, and two light-sensitive element groups determine that two are mutually handed over The wrong polar coordinates relevant with angle, by the information determined including two polar coordinates, determine the position of luminous point.

16. the double-camera touch screen system according to any one in claim 1-8, it is characterised in that signal transacting When system obtains the position of the luminous point by the angular relationship between luminous point and light-sensitive element group, also to photosensitive in light-sensitive element group The difference relationship of light signal strength on element is analyzed, to improve precision.

17. the double-camera touch screen system according to any one in claim 1-8, it is characterised in that touch pad selects Shown with the screen of display, such as screen of projecting display, liquid crystal display equipment screen, negative electrode display tube indicator screen, LED Show screen, the projecting apparatus screen of device.

18. double-camera touch screen system according to claim 17, it is characterised in that the photosensitive member in light-sensitive element group Part is arranged on screen periphery.

19. double-camera touch screen system according to claim 17, it is characterised in that when screen printing opacity, such as rear-projection The screen of formula display, the light-sensitive element in light-sensitive element group is arranged in front of screen, or is arranged in screen rear.

20. the double-camera touch screen system according to any one in claim 1-8, it is characterised in that touch pad selects With the transparent protective plate in front of screen.

21. the double-camera touch screen system according to any one in claim 1-8, it is characterised in that touch pad is During transparent protective plate, light-sensitive element group is arranged on the front of protective plate, is arranged between screen and protective plate, i.e. protective plate Below or it is arranged in around protective plate edge.

22. the double-camera touch screen system according to any one in claim 1-8, it is characterised in that dual camera Touch-screen system also includes a dual camera touch-screen system light source.

23. double-camera touch screen system according to claim 22, it is characterised in that touch prelaminar part is transparent Jie Matter, the more uniform outer surface that is radiated at of light caused by the light source have on the touch pad of transparent medium, and on the outside of touch pad Transmission.

24. double-camera touch screen system according to claim 22, it is characterised in that light source touches back or side certainly The more uniform irradiation in face on a touchpad, and to more uniform transmission on the outside of touch pad；Part contact touch pad is touched using one, is touched Touch part to be irradiated by the light of light source, form luminous point.

25. double-camera touch screen system according to claim 24, it is characterised in that the touch part, which refers to touch, to be touched The object of template.

26. double-camera touch screen system according to claim 25, it is characterised in that it is described touch part be finger or Pen.

27. double-camera touch screen system according to claim 22, it is characterised in that the light source is strip-shaped light source.

28. double-camera touch screen system according to claim 27, it is characterised in that in the close screen one of protective plate The horizontal side of side is provided with strip-shaped light source, and another horizontal side is provided with the light-sensitive element group of row's light-sensitive element composition, strip light The light in source passes through protective plate, and direction of illumination is another horizontal side corresponding thereto, and in front of pico- oblique protective plate；Anti- Longitudinal side of the close screen side of backplate is provided with strip-shaped light source, and another longitudinal side is provided with the light of row's light-sensitive element composition Quick element group, the light of strip-shaped light source pass through protective plate, and direction of illumination is another longitudinal side corresponding thereto, and pico- oblique In front of protective plate.

29. double-camera touch screen system according to claim 22, it is characterised in that two light for being provided with plus lens Quick element group, the corner of protective plate is easily disposed in, effectively reduces blind area.

30. double-camera touch screen system according to claim 27, it is characterised in that the strip-shaped light source, be by more The light source for the strip that individual small sub-light source is arranged in.

31. double-camera touch screen system according to claim 27, it is characterised in that the strip-shaped light source, including one The illuminator of strip.

32. double-camera touch screen system according to claim 22, it is characterised in that touched without touching part During plate, the light that light-sensitive element receives is weaker, and the light intensity on touch pad is more uniform, in the absence of luminous point；With touch part When being touched to touch pad, light forms luminous point on a touchpad.

33. double-camera touch screen system according to claim 22, it is characterised in that touch part from touch pad farther out When, only a small amount of light is radiated at and touched on part in the light appeared by touch pad, wherein and only small part light reflect again Touch pad is returned, and the light being reflected back is not concentrated, it is impossible to form luminous point, double-camera touch screen system is not responding to；

Touch pad can not be projected by touching light when part contacts with touch pad, directly form light with touch pad contact position in touch part Point.

34. double-camera touch screen system according to claim 27, it is characterised in that the light that a strip-shaped light source projects Signal, corresponding electric signal is converted into by corresponding light-sensitive element and is sent to signal processing system, signal processing system will Location dependent information of the corresponding electric signal as the acquisition luminous point on a touchpad；

The optical signal that this strip-shaped light source projects can not be sent at signal by light-sensitive element corresponding with other strip-shaped light sources The optical signal that this strip-shaped light source projects can be sent to letter by reason system, or light-sensitive element corresponding with other strip-shaped light sources Number processing system, but signal processing system is not using the corresponding electric signal as obtaining the position phase of the luminous point on a touchpad Close information.

35. double-camera touch screen system according to claim 34, it is characterised in that the plural bar strip-shaped light source is handed over For lighting, wherein when a strip-shaped light source is not lighted, the electric signal of corresponding light-sensitive element group output is not received；

During one strip light source igniting, the electric signal of corresponding light-sensitive element group output is received and located by signal processing system Reason.

36. double-camera touch screen system according to claim 35, it is characterised in that plural bar strip-shaped light source, it is and each Strip-shaped light source is provided with light-sensitive element to deserved；Each strip-shaped light source has the flicker frequency for differing larger respectively；With each strip-shaped light source Corresponding each light-sensitive element connects frequency-selecting module corresponding with the strip-shaped light source flicker frequency respectively.