CN205581833U - Laser scanning multiple spot touch devices - Google Patents

Abstract

The utility model is suitable for a touch -control technical field provides a laser scanning multiple spot touch devices, including the screen, the screen periphery is the round frame, the laser scanner spare of a body structure is installed at least to the optional position in the frame, laser scanner spare includes laser transmitting module, optical scan module, laser receiving module and signal processing module, the optical scan module is just right laser transmitting module's laser exit port position, the laser receiving module is located near optical scan module, the output of laser receiving module and the optical scan module is connected to signal processing module. The utility model discloses can realize the remote touch point of jumbotron surveys, and laser transmitting module, laser interface module, an optical scan module body structure, the engaged position is little, and installation and debugging equipment is also easier.

Description

A kind of laser scanning multi-point touch control apparatus

Technical field

This utility model belongs to technical field of touch control, particularly relates to a kind of laser scanning multi-point touch control apparatus.

Background technology

Touch screen type can be divided into according to touch-control principle: resistance-type (double-deck), surface capacitance type and faradism Appearance formula, surface acoustic wave type, infrared-type and optical imaging type etc..But wherein resistance touch screen, capacitive touch Control screen and the general cost of surface acoustic wave touch screen are higher, are only applicable to the small screen touch-control；Optical imagery touch-control Screen optical imagery is easier to receive the interference of environment pipe；Answer giant-screen touch-control solution general the most at present Use infrared touch control screen.

Infrared touch control screen, is usually and installs a housing in indicator screen periphery, and housing is built with circuit Plate, left side (Y-axis) and base (X-axis) at screen outer-border are respectively provided with infrared transmitting tube, at X Axle, Y-axis opposite side one_to_one corresponding installation infrared receive head, as shown in Figure 1.Formed in length and breadth before screen after energising The infrared ray matrix intersected, when user's Touch Screen, finger touch point will stop X, Y through this point The infrared ray of axle both direction, by the output signal of AD sampling infrared receiving terminal, can calculate touch Point position.

Another kind of infrared touch control screen is as in figure 2 it is shown, infrared transmitting tube on housing and receive the arrangement side of head Formula is identical with Fig. 1, but infrared transmitting tube and transmitting and the reception corresponding relation difference receiving head. When an infrared transmitting tube job, a upper infrared receiving terminal of corresponding position receives infrared signal, I.e. launching and receiving line is an oblique line, forms corresponding infrared detection light net.Again by receiving head Output signal confirm position a little.

But it is clear that for the Touch Screen of giant-screen, particularly oversize, the screen of such as 20m x 10m Curtain, if close and numerous layout infrared transmitting tube and infrared receiving terminal in housing, cost is the highest, installs The most complicated, and so many infrared transmitting tube and infrared receiving terminal work simultaneously so that whole product merit Consume the biggest.The most current infrared touch control screen is not suitable for the Touch Screen of oversize yet.

Utility model content

In view of the above problems, the purpose of this utility model is to provide a kind of laser scanning multi-point touch control apparatus, Aim to solve the problem that existing infrared touch control screen cost is high, power consumption big, it is complicated to install, cannot realize oversize (as 20m x 10m) the technical problem of multi-point touch.

This utility model adopts the following technical scheme that

Described laser scanning multi-point touch control apparatus includes that screen, described screen periphery are a circle housing, described outside In frame, optional position is at least provided with the laser scanning device of an integrative-structure, described laser scanning device bag Including laser emitting module, optic scan module, laser pick-off module and signal processing module, described optics is swept Retouching the module laser emitting mouth position just to described laser emitting module, described laser pick-off module is positioned at described Near optic scan module, outfan and the described optic scan module of described laser pick-off module are connected to Described signal processing module.

Further, described laser pick-off module includes reception camera lens, is positioned at the light at described reception camera lens rear Electric explorer, the signal output part of described photodetector is connected to described signal processing module.

Further, described optic scan module is sweeping mirror, including micromachine, reflecting optics, motor Drive circuit, the output shaft of described micromachine links with the axis of described reflecting optics, and described motor drives Circuit makes described reflecting optics equifrequency interval in the range of certain angle come and go by controlling described micromachine Rotating, described motor-drive circuit is connected to described signal processing module.

Further, the laser beam that described laser emitting module sends is the single beam laser of band carrier wave, and laser Wave-length coverage is between black light 600～1000nm.

Further, described laser scanning multi-point touch control apparatus also includes being connected with each signal processing module Process output module.

Further, described process output module is positioned at described housing.

Further, described process output module is also associated with winding displacement socket, and described winding displacement socket is positioned at described The screen back side or housing side.

The beneficial effects of the utility model are: in this utility model, and laser emitting module launches uniform tune Laser processed, anti-interference energy is strong, will not be disturbed by ambient light, and laser beam is realized by optic scan module Arbitrary region scans, it is possible to achieve the remote touch point of jumbotron detects；And laser emitting module, The integrative-structure such as laser interface module, optic scan module, engaged position is little, and installation and debugging equipment is the most more Easily.

Accompanying drawing explanation

Fig. 1 is a kind of structure chart of existing infrared touch panel；

Fig. 2 is the another kind of structure chart of existing infrared touch panel；

Fig. 3 is a kind of structure chart of the laser scanning multi-point touch control apparatus that this utility model embodiment provides；

Fig. 4 is the schematic diagram of laser scanning multi-point touch control apparatus；

Fig. 5 is a kind of concrete structure figure of optic scan module；

Fig. 6 is a kind of concrete structure figure of laser pick-off module；

Fig. 7 is the schematic diagram that four Angle Position of housing install laser scanning device；

Fig. 8 is the schematic diagram that four laser scanning devices launch that laser beam is scanned；

Fig. 9 is the another kind of structure chart of the laser scanning multi-point touch control apparatus that this utility model embodiment provides.

Detailed description of the invention

In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing And embodiment, this utility model is further elaborated.Should be appreciated that described herein specifically Embodiment, only in order to explain this utility model, is not used to limit this utility model.

In order to technical scheme described in the utility model is described, illustrate below by specific embodiment.

As shown in Figure 3, Figure 4, the laser scanning multi-point touch control apparatus that the present embodiment provides includes screen 1, institute Stating screen 1 periphery is a circle housing 2, and in described housing, optional position is at least provided with an integrative-structure Laser scanning device 3, described laser scanning device 3 include laser emitting module 31, optic scan module 32, Laser pick-off module 33 and signal processing module 34, described optic scan module 32 is just to described Laser emission The laser emitting mouth position of module 31, it is attached that described laser pick-off module 33 is positioned at described optical scanning mould 32 pieces Closely, outfan and the described optic scan module 32 of described laser pick-off module 33 is connected to described signal Processing module 34.

In the present embodiment, described laser emitting module 31 sends uniform modulating lasering beam, and optical maser wavelength model Enclose for black light, between i.e. 600～1000nm.The scattered angle of laser beam is the least, measures distance Up to 100 meters, it is ensured that laser beam irradiation spot size a long way off is the least.Additionally Laser emission frequency Rate is the highest, and the such as single measurement time is within 0.2ms.Laser emitting module 31 sends laser Shu Hou, is changed the exit direction of laser beam, thus forms a fan on screen by optic scan module 32 Shape scanning area, touches if screen is unmanned, then can be reflected back by laser signal from frame, if screen has finger Touching, then will laser-bounce return in position, touch point, described laser pick-off module 33 receives laser-bounce letter Number, and export the curtage data of corresponding size, due to sweeping angle and the touch of optic scan module Mapping relations one by one during the angular position information of point, therefore signal processing module 34 is from optic scan module 32 Get current sweeping angle and i.e. can get the angular position information of touch point, then pass through laser emitting module 31 laser beams sent and laser pick-off module 33 receive the time difference of laser beam, it is easy to just can calculate Obtain the distance and position information of touch point, so can be obtained by complete touch point coordinate data, by existing Common single-chip microcomputer is had to realize.

Wherein as it is shown in figure 5, as a kind of concrete structure of shown optic scan module, described optical scanning Module 32 is sweeping mirror, including micromachine 321, reflecting optics 322, motor-drive circuit 323, institute State the output shaft of micromachine 321 and the axis linkage of described reflecting optics 322, described motor-drive circuit 323 make described reflecting optics 322 equifrequency in the range of certain angle by controlling described micromachine 321 Interval comes and goes and rotates, and described motor-drive circuit 323 is connected to described signal processing module 34, it is possible to achieve The sweeping of wide-angle in short time, it is ensured that is launched goes out laser beam and can reach the arbitrary region of touch surface. In diagram, after laser emitting module 31 launches the laser beam A of a fixed-direction and frequency, and pass through Sweeping mirror reflects two laser beam B and C, and wherein O is a bit on reflecting optics axis, plane P0 Position for sweeping mirror reflecting optics previous time point；Plane P1 is the position of sweeping mirror reflecting optics current time Putting, the minimum angles of each sweeping is a, thus defines B Yu C these two and launch laser beam.The most every After one angle a of secondary sweeping, from reflecting optics, launch a scanning laser beam, when fast with certain frequency During speed sweeping, scanning laser beam can be completely covered screen.

For described laser pick-off module 33, as shown in Figure 6, connect described in receiving camera lens 331, being positioned at Receiving the photodetector 332 at camera lens rear, the signal output part of described photodetector 332 is connected to described Signal processing module 34.Receive camera lens 331 and receive the laser of corresponding specific wavelength, shield ambient light, described Receiving camera lens 331 to be made up of multiple eyeglasses, the laser detector 332 being arranged on a last eyeglass can be felt The laser that should reflect, and transfer optical signal to the signal of telecommunication, pass to signal processing module 34, then at signal Reason module calculates the distance of laser-bounce point distance means according to the time difference of Laser emission and return；So Touch point coordinate figure is i.e. can determine that afterwards according to current sweeping angle.When there is no touch point on screen, from optics The laser beam that scan module 32 is launched all shines on housing 1, thus can calculate according to return laser light Go out different sweeping angles in an initial condition for initial value.When laser beam C is irradiated on the M of touch point, The irradiation energy of laser beam C can be reflected back, and enters laser pick-off module 33.Therefore according to current sweeping Angle and range data, and compare with initial value, touch point can be determined whether, when there being touch During point, when the distance value calculated can be less than initial value, thus judge to there is touch point.

It should be noted that in the present embodiment, described signal processing module mainly realizes sweeping angular transition For touch point coordinate angle, and time difference will be received by Laser emission and calculate the merit of touch point range coordinate Can, described sweeping angle and touch point coordinate angle are one-to-one relationships, by mapping table or simple Angular transition is the most available.Signal processing module the most described here passes through existing simple single-chip microcomputer or meter Calculate module can realize.

In the present embodiment, described laser scanning device 3 at least one, may be mounted at housing optional position, Such as it is arranged on four angles or the centre position of four edges of housing.If but only arranging a laser and sweep Retouch device, if there being multiple touch point to be located along the same line with laser scanning device, then touch point can be there is The situation of None-identified, it is therefore preferred that laser scanning device arranges multiple, and this device also include with respectively The process output module that individual signal processing module connects, divides as it is shown in fig. 7, arrange four laser scanning devices It is not positioned on four angles of housing, according to different laser scanning device result of calculations, rejects false point, be given Correct touch point information.Four laser scanning device repeating query work, when laser scanning device Laser1 works Time, 2 touch points that there may be touch point can be scanned and process sector region L1 and La, by fan section Territory L1 and La is divided into N number of pretreatment touch point by 5mm*5mm area；Judge that N number of pretreatment is touched Touch and be a little the true theoretical foundation put: if pretreatment touch point can scan at each laser scanning device, then It is judged as true point, is otherwise false point.Process output module and reject false point according to this criterion, calculate true point. Same described process output module can be realized by existing simple single-chip microcomputer or processor.

As a kind of mounting means of described process output module 4, as it is shown in figure 9, described process is defeated Go out module 4 and be positioned at described housing 1, and process output module 4 is also associated with winding displacement socket 41, described row Line socket 41 is positioned at the described screen back side or housing side.In this structure, by arranging winding displacement socket 41, Facilitating this device to be connected with ancillary equipment, winding displacement socket 41 includes power supply lead wire, touch point output lead, screen Curtain arranges lead-in wire, picture signal lead-in wire, control signal lead-in wire etc..When user touches on screen, identify The coordinate position of the touch point gone out, by described winding displacement socket output valve ancillary equipment, forms corresponding operation and refers to Order.

To sum up, in this utility model, laser scanning device is structure as a whole, and saves and pacifies while taking up room Debug examination to be also more prone to；The laser beam homogeneous that laser emitting module sends is good, and transmitting range is remote, is not subject to Ambient light interference, to human body fanout free region, due to Laser emission distance, therefore screen can make oversize, It is that the most existing product technology is incomparable.

The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, All any amendment, equivalent and improvement etc. made within spirit of the present utility model and principle, all should Within being included in protection domain of the present utility model.

Claims (7)

1. a laser scanning multi-point touch control apparatus, it is characterised in that include that screen, described screen periphery are One circle housing, in described housing, optional position is at least provided with the laser scanning device of an integrative-structure, institute State laser scanning device and include laser emitting module, optic scan module, laser pick-off module and signal processing Module, described optic scan module just laser emitting mouth position to described laser emitting module, described laser Receiver module is positioned near described optic scan module, the outfan of described laser pick-off module and described light Learn scan module and be connected to described signal processing module.

2. laser scanning multi-point touch control apparatus as claimed in claim 1, it is characterised in that described laser pick-off Module includes reception camera lens, is positioned at the photodetector at described reception camera lens rear, described photodetector Signal output part is connected to described signal processing module.

3. laser scanning multi-point touch control apparatus as claimed in claim 2, it is characterised in that described optical scanning Module is sweeping mirror, including micromachine, reflecting optics, motor-drive circuit, and described micromachine defeated Shaft links with the axis of described reflecting optics, and described motor-drive circuit makes by controlling described micromachine Obtaining described reflecting optics equifrequency interval in the range of certain angle and come and go rotation, described motor-drive circuit connects To described signal processing module.

4. laser scanning multi-point touch control apparatus as claimed in claim 1, it is characterised in that described Laser emission The laser beam that module sends is the single beam laser of band carrier wave, and laser wavelength range is black light Between 600～1000nm.

5. laser scanning multi-point touch control apparatus as described in any one of claim 1-4, it is characterised in that described Laser scanning multi-point touch control apparatus also includes the process output module being connected with each signal processing module.

6. laser scanning multi-point touch control apparatus as claimed in claim 5, it is characterised in that described process exports Module is positioned at described housing.

7. laser scanning multi-point touch control apparatus as claimed in claim 6, it is characterised in that described process exports Module is also associated with winding displacement socket, and described winding displacement socket is positioned at the described screen back side or housing side.