CN102375615A - Laser Optical Touch Module - Google Patents

Abstract

A laser optical touch control module is arranged at one side of the surface of a display screen to provide an optical positioning input function to form an optical touch control display screen system, and a light emitting part with a laser light source and a light receiving part with a position sensor (camera) are combined together to enable the laser light source and the position sensor to be arranged at the same position of one side of the surface of the display screen for use, wherein the light emitting part emits laser beams through the laser light source and enables the refracted light angle (light fan) to be larger than 90 degrees through the refraction of a wide-angle optical element such as a wire bonding lens (line generating optics), so as to form wide-angle linear beams on the surface of the display screen, and the light receiving part receives and senses the laser beams reflected by the linear beams and blocked by a touch control element through the position sensor so as to sense the relative position of the touch control element.

Description

The laser optics touch-control module

Technical field

The relevant a kind of optical touch module of the present invention refers to especially a kind ofly utilize the illuminating part of a tool LASER Light Source and the light absorbing part of a tool position sensor, and forms a module with parallel light path mode or common light path mode between the light path of this illuminating part and light absorbing part.

Background technology

Present just popular touch-sensitive display screen; Directly touch on the surface of display screen with each item function of control display as clicking operation, image switching or amplification/dwindle picture etc., like finger or pointer through touching control in order to replace the common button control mode of general display; And present touch-sensitive display screen has comprised multiple different touch-control system; As resistance-type (Resistive), condenser type (Capacitive), surface acoustic wave type (SAW, Surface Acoustic Wave), infrared light formula (IR, Infrared), optical profile type (optical imaging) etc.; Each have their own relative merits; Wherein, the advantage of optical touch control system has the advantage of cost for being applied to the large scale display screen; Between surface acoustic wave type and condenser type, screen has good transparency (can reach 100%) and has good touch-control resolution; Its shortcoming is subject to the influence of surrounding enviroment light and must adopts additional illumination light source and reflecting strips or extinction bar for being not suitable for the application of small size panel (below 15 inch).

The optical touch control system aspect has comprised US 2009/0200453, US 7,538,759, US7; 692,625, US 7,629; Many prior aries such as 967, generally speaking, these a plurality of optical touch control system prior aries are on the lateral margin on the surface of display screen; Like on the four side frame limits on rectangular display screen surface or four jiaos of places, at least one group of light supply apparatus is set as making light source, on the outside surface that is radiated at whole screen with LED; Promptly on the surface of entire display screen, form light or linear light irradiated region; Can be described as the light curtain, and around this display screen surface, orthogonal reflecting strips or extinction bar are set on the edge (edge), on the lateral margin of this display screen surface, dibit is set at least again and puts sensor (camera) with the staggered mode of sensing direction; Then when a touching control; Like finger or pointer; Touch is on this display screen surface the time; This touching control can cause scattering of light or blocking to this light that be radiated at entire display screen surface, sees through the reflex of this reflecting strips or the absorption of extinction bar this moment, can through this at least dibit put sensor is learnt these touching control at least two directions with sensing relative position; Calculation function through a treatment circuit touches the physical location coordinate on display screen surface to learn this touching control again, to reach the functions of use of a known optical touch system at present.

Existing general optical touch control system mostly adopts light emitting diode (LED, light-emitting diode) as light source in design, and LED light is not high same tone (highly coherent light) light source, so can't effectively improve the sensitivity of touch-control; Existing again led light source device is the individuality that separates with employed position sensor (camera); And be arranged at a certain position of edge (edge) all around of display screen surface respectively; And must cooperate reflecting strips or extinction bar to use on the overall architecture again; So that have shortcomings such as complex structure, cost increase; Especially the irradiates light that provided of this led light source device is generally visible light, receives the interfere with or compromise of the visible light that visible light and display screen produced under the environment for use easily, so that the sensing sensitivity of position sensor reduces in the optical touch control system; Be that signal to noise ratio (snr) reduces and influences the interpretation of signal relatively, so that reduce the service efficiency of optical touch control system.

By on can know that in the technical field of optical touch control system, development design is a kind of must not adopt the optical touch control system of reflecting strips or extinction bar and designs simplification, cost savings, and its desirability is arranged really.

Summary of the invention

Fundamental purpose of the present invention is to provide a kind of laser optics touch-control module; It utilizes a tool LASER Light Source such as the illuminating part of infrared ray (IR) laser and the light absorbing part of a tool position sensor to combine; So that being located at the same position place of a side of display screen surface, this LASER Light Source and position sensor use; Wherein this illuminating part sends laser beam through a LASER Light Source and the light visual angle (light fan) after a wide-angle makes refraction with the refraction of optical element such as routing eyeglass (line generator optics) can be spent greater than 90; On display screen surface, to form the linear light beam of wide-angle; This light absorbing part receives through position sensor and responds to that this linear light beam receives stopping of touching control and laser light reflected light is learnt the relative position of this touching control with sensing; Make high same tone (highly coherent light) to promote the sensitivity of touch-control through laser beam; And avoid prior art must adopt the trouble of reflecting strips or extinction bar, reach the highly sensitive use effect of designs simplification and touch-control.

Still a further object of the present invention is to provide a kind of laser optics touch-control module; Wherein combine side by side with level and parallel light path mode between the light path of the light path of this illuminating part and light absorbing part; Make high same tone through laser beam promoting the sensitivity of touch-control, and reach designs simplification and easy-on uses effect.

Another purpose of the present invention is to provide a kind of laser optics touch-control module; Wherein combine to be total to the light path mode between the light path of the light path of this illuminating part and light absorbing part; Make the position sensor of LASER Light Source and the light absorbing part of illuminating part can a shared wide-angle with optical element such as routing eyeglass (line generator optics); Be that the laser beam that sends of LASER Light Source and folded light beam that position sensor received and responded to are all passed through identical wide-angle and used optical element; Establishing a spectroscope (beam splitter) in this wide-angle with the rear of optical element more outwards penetrates so that the laser beam that LASER Light Source sent passes this spectroscope; And make reflect beams of laser light get into this position sensor to receive induction via the reflection of this spectroscope; With save this position sensor originally the wide-angle of institute's palpus and avoid the optical aberration of this wide-angle, i.e. the optical distortion in peripheral outfield (optical distortion) with optical element such as the wide-angle eyeglass (angle of visibility＞90 are spent) that forms images with optical element; One lenticule (Mirco Lens) further can be set on the sensing face of this position sensor again,, receive luminous energy power and efficient to increase as the CMOS sensor of general commercial usefulness.

Another purpose of the present invention is to provide a kind of laser optics touch-control module; Wherein when between the light path of the light path of this illuminating part and light absorbing part so that the light path mode is combined altogether; This LASER Light Source further can use the minor diameter laser beam, to promote the astigmatic efficient of this wide-angle with optical element such as routing eyeglass, again at the sensing face front end of this position sensor; Promptly between this position sensor and the spectroscope; Further can establish a smooth beam expanding lens (beam expander optics), become larger-diameter laser beam to reenter the sensing face that is incident upon position sensor with the laser beam enlarging with minor diameter, using the image-generating unit that effectively utilizes on this position sensor (is pixel; And then promote the resolution of touch-control pixels).

Another purpose of the present invention ties up in a kind of laser optics touch-control module is provided; Wherein when being so that the light path mode is combined altogether between the light path of the light path of this illuminating part and light absorbing part; It further can establish a quarter-wave plate (quarter wave-plate) and a polarization spectroscope (polarization beam splitter) with the rear of optical element such as routing eyeglass (line generator optics) in this wide-angle in regular turn; The characteristic of two kinds of linearly polarized photons that the laser beam laser capable of using that LASER Light Source is sent is possessed; It is the linearly polarized light of P linearly polarized light (P-polarization) and S linearly polarized light (S-polarization) pairwise orthogonal; Through this polarization spectroscope the time, making wherein, a linearly polarized light (being generally the P linearly polarized light) then reflects through another linearly polarized light (being generally the S linearly polarized light) with its quadrature fully fully; Again through this quarter-wave plate; The linear polarization that to pass through converts a circularly polarized light into and (claims left-handed or dextrorotation rotatory polarization; Left hand circular polarization/right hand circular polarization); If wherein convert the outgoing of left-handed (or dextrorotation) circularly polarized light into, will become dextrorotation (or left-handed) rotatory polarization after then reflecting via stopping of touching control, and folded light beam earlier through this quarter-wave plate with convert into one with the line polarisation of former emerging ray polarisation quadrature; Being incident to this polarization spectroscope more also reflexes on this position sensor fully; By this, can promote the service efficiency of light, promptly the service efficiency of this laser light energy is reached the maximization effect.

Description of drawings

Fig. 1 be laser optics touch-control module first embodiment of the present invention (transmitting-receiving parallel light path) be arranged at display screen surface a side so that the user mode synoptic diagram of the reflective location of light input function to be provided.

Figure 1A is the induced signal output synoptic diagram of the pixel of position sensor of the present invention among Fig. 1 embodiment.

Fig. 2 is the schematic perspective view of laser optics touch-control module first embodiment of the present invention (transmitting-receiving parallel light path).

Fig. 3 is a plane (on the look) synoptic diagram of Fig. 2 embodiment (transmitting-receiving parallel light path).

Fig. 4 is a floor map of laser optics touch-control module second embodiment of the present invention (transmitting-receiving is light path altogether).

Fig. 5 is a functional status synoptic diagram of establishing a lenticule (Mirco Lens) on the sensing face of position sensor of the present invention.

Fig. 6 is a floor map of laser optics touch-control module the 3rd embodiment of the present invention (transmitting-receiving is light path altogether).

Fig. 7 is a floor map of laser optics touch-control module the 4th embodiment of the present invention (transmitting-receiving is light path altogether).

Embodiment

For making the present invention clear and definite more full and accurate, cooperate following diagram to detail as the back structure of the present invention and technical characterictic thereof:

Fig. 1,1A are respectively laser optics touch-control module first embodiment of the present invention (transmitting-receiving parallel light path) sides that are arranged at display screen surface with the induced signal output synoptic diagram of the pixel of user mode synoptic diagram that the reflective location of light input function is provided and position sensor.Laser optics touch-control module 1 of the present invention is arranged at a side ondisplay screen 2 surfaces, and in order to optical profile type location input function to be provided, confession can form an optical touch control system on thisdisplay screen 2; Generally speaking; On the periphery ondisplay screen 2 surfaces dual-laseroptical touch module 1 at least must be set; Adjacent two jiaos of places as atdisplay screen 2 lateral margins respectively establish a laser optics touch-control module 1, and wherein the sensing direction of the position sensor (camera) that had of each laser optics touch-control module 1 forms interlace mode on thesedisplay screen 2 surfaces.The user mode of only representing a laser optics touch-control module 1 wherein among Fig. 1.

This laser optics touch-control module 1 is formed a module by anilluminating part 10 and alight absorbing part 20; Thisilluminating part 10 andlight absorbing part 20 can be installed with in ashell body 30 inside to form an assembly again; And the shape of thisshell body 30 does not limit, and which is provided with opening corresponding to the light path of thisilluminating part 10 andlight absorbing part 20 like an illuminating part opening 301 and a light absorbing part opening 302.Thisilluminating part 10 mainly through a LASERLight Source 11 with send laser beam and through a wide-angle with the refraction ofoptical element 12 like routing eyeglass (line generator optics); Make the laser light visual angle (light fan) after the refraction can be as shown in Figure 1, ondisplay screen 2 surfaces, to form thelinear light beam 101 of wide-angle greater than 90 degree; When touchingcontrol 3touch display screens 2 surface last times, can stop thislinear light beam 101 and form reflect beams oflaser light 102; 20 of this light absorbing parts through aposition sensor 21 to receive and to respond to this reflect beams oflaser light 102, to learn the relative position of thistouching control 3 on a correspondingoptical axis 103 at sensing on the sensing face ofposition sensor 21; Shown in Figure 1A; The reflect beams oflaser light 102 that these touchingcontrol 3 positions are produced can produce reaction and form signal output on pixel (active pixel) axle ofposition sensor 21; Learn with sensing and the relative position of these touchingcontrol 3 at least two directions can touch atdisplay screen 2 lip-deep physical location coordinates to learn this touchingcontrol 3 and putsensor 21 through the calculation function of treatment circuit through dibit at least; Because thisposition sensor 21 or wide-angle utilize present electronic technology or prior art to reach withoptical element 12 like the body construction of routing eyeglass (line generator optics) and the calculation function system of treatment circuit; And non-technical characterictic of the present invention is so repeat no more in this.

Fig. 2, Fig. 3 are respectively schematic perspective view and plane (on the look) synoptic diagram of laser optics touch-control module first embodiment of the present invention (transmitting-receiving parallel light path).And Fig. 2,3 illustrated embodiments (transmitting-receiving parallel light path) just are used for explaining but non-in order to the restriction laser optics touch-control module 1 of the present invention main member; Laser optics touch-control module 1 of the present invention utilizes a tool LASER LightSource 11 to be combined into a module like theilluminating part 10 of infrared laser (IRLD) and thelight absorbing part 20 of atool position sensor 21; So that this LASERLight Source 11 andposition sensor 21 can be located at the homonymy position of a side ondisplay screen 2 surfaces; Wherein thisilluminating part 10 comprises a laser diode (laser diode) 111 and one first order optical element (1 through a LASERLight Source 11^StOptics) 112; Send laser beam and warp one wide-angle with the refraction ofoptical element 12 like routing eyeglass (line generator optics); Make the light visual angle (light fan) after the refraction can be as shown in Figure 3 greater than 90 degree, with thelinear light beam 101 that ondisplay screen 2 surfaces, forms wide-angle like Fig. 1, shown in 3; Thislight absorbing part 20 receives withoptical element 22 through aposition sensor 21 and an optically focused and responds to that thislinear light beam 101 receives stopping of touchingcontrol 3 and laser light reflectedlight beam 102 is as shown in Figure 1, learns the relative position of thistouching control 3 with sensing; Therefore; Laser optics touch-control module 1 of the present invention passes through the high same tone (highly coherent light) of laser beam to promote the sensitivity of touch-control; And can avoid prior art must adopt the trouble of reflecting strips or extinction bar, so have the highly sensitive use effect of designs simplification, easy mounting and touch-control.

Again with reference to figure 2, shown in 3, the laser optics touch-control module 1 of this first embodiment is formed a module by anilluminating part 10 and alight absorbing part 20, thisilluminating part 10 andlight absorbing part 20 can be installed with in ashell body 30 inside to be combined into the use appearance attitude of a module again; Thisshell body 30 is provided with the opening corresponding to the light path of thisilluminating part 10 andlight absorbing part 20; Comprise an illuminating part opening 301 and a light absorbing part opening 302 like Fig. 1, shown in 2; Wherein between the light path of the light path of thisilluminating part 10 andlight absorbing part 20; Be between the light path of LASERLight Source 11 andposition sensor 21; That is between this illuminating part opening 301 and the light absorbing part opening 302, combine side by side with the parallel light path mode, with this first embodiment like Fig. 2, shown in 3; Laterally combine side by side with level (with respect todisplay screen 2 surfaces) and parallel light path mode between the light path of the light path of thisilluminating part 10 andlight absorbing part 20 but do not limit, as with vertical (with respect todisplay screen 2 surfaces) and parallel light path mode up and down tile vertically combine (figure does not show).

Fig. 4 is a floor map of laser optics touch-control module second embodiment of the present invention (transmitting-receiving is light path altogether).The laser optics touch-control module 1a of this second embodiment forms a module by anilluminating part 10 and alight absorbing part 20, and thisilluminating part 10 andlight absorbing part 20 can be installed with in ashell body 30 inside to be combined into the use appearance attitude of a module again; In this second embodiment; Between the light path of the light path of thisilluminating part 10 andlight absorbing part 20; Be between the light path of LASERLight Source 11 andposition sensor 21; Combine to be total to the light path mode; Therefore the set light path opening corresponding to thisilluminating part 10 andlight absorbing part 20 on theshell body 30 of this second embodiment like illuminating part opening 301 and the light absorbing part opening 302 of first embodiment, forms shared same opening 301 (302) and supplies the LASER Light Source 11 and the light path ofposition sensor 21 to pass through onshell body 30; Pass through the common light path mode of this second embodiment again; The LASER Light Source 11 that makes thisilluminating part 10 and theposition sensor 21 of thislight absorbing part 20 can shared same wide-angle with optical element 12 (22) like routing eyeglass (line generator optics); Be thelaser beam 101 that sent of LASER Light Source 11 and 21 reflect beams of laser light that receive and respond to 102 of position sensor all through an identical wide-angle with optical element 12 (22), promptly the reverse optical path of this routing eyeglass (line generator optics) can produce the optically focused effect like wide-angle imaging eyeglass (angle of visibility＞90 degree).This wide-angle with the rear of optical element 12 (22) establish spectroscope (beam splitter) 40 that a tool divides light action outwards penetrate so that thelaser beam 101 that LASER Light Source 11 sent passes thisspectroscope 40 to wide-angle with optical element 12 (22), and can reflect when making reflect beams oflaser light 102 be incident upon thisspectroscope 40 with optical element 12 (22) and get into and received induction by thisposition sensor 21 via this wide-angle; And this second embodiment is through being total to the structure of light path mode; Can save thisposition sensor 21 originally the wide-angle of institute's palpus withoptical element 22; Promptly the reverse optical path of this routing eyeglass (line generator optics) can produce the effect like wide-angle imaging eyeglass (angle of visibility＞90 degree); And can avoid the optical aberration of this wide-angle, i.e. the optical distortion in peripheral outfield (optical distortion) with optical element 22.Further can establish a collimating mirror (collimator) 50 between 40 at this LASER LightSource 11 and spectroscope (beam splitter) again; So that the laser beam 104 that LASER Light Source 11 is sent can form parallel beam 105 after through this collimating mirror (collimator) 50, to help again through this wide-angle with optical element 12 (22) like the linear light beam of routing eyeglass (line generator optics) with formation wide-angle on display screen surface.

Again with reference to figure 4, shown in 5; One lenticule (Mirco Lens) 60 further can be set on thesensing face 211 of thisposition sensor 21; The effect of this lenticule (Mirco Lens) 60 is as the complementary metal oxide semiconductor (CMOS) sensor (CMOS) of general commercial usefulness; Can make thetouching control 3 touch-controls laser beam that the position Φ 4 amongposition Φ 1～Φ N is produced on correspondingoptical axis 103 102 further optically focused on sensingface 211 each pixel (pixel) #1～#N in respective pixel #4 on, receive luminous energy power and efficient to increase.

Fig. 6 is a floor map of laser optics touch-control module the 3rd embodiment of the present invention (transmitting-receiving is light path altogether).The framework of the laser optics touch-control module 1b of this 3rd embodiment is identical substantially with the laser optics touch-control module 1a of second embodiment shown in Figure 5; The main difference point is: the further use of this LASER Light Source can be sent the LASER Light Source 11a ofminor diameter laser 104a, to promote this wide-angle with the astigmatic efficient of optical element 12 (22) like the routing eyeglass; This moment is at sensingface 211 front ends of thisposition sensor 21; Promptly between thisposition sensor 21 and thespectroscope 40; Further establishing a smooth beam expanding lens (beam expander optics) 70, expand into larger-diameter laser beam in order to the reflect beams oflaser light 102a with minor diameter and reenter thesensing face 211 that is incident uponposition sensor 21, (is pixel effectively to utilize the image-generating unit on thisposition sensor 21; And then promote the resolution of touch-control pixels).

Fig. 7 is a floor map of laser optics touch-control module the 4th embodiment of the present invention (transmitting-receiving is light path altogether).The framework of the laser optics touch-control module 1c of this 4th embodiment is identical substantially with the laser optics touch-control module 1b of the 3rd embodiment shown in Figure 6; The main difference point is: in regular turn establish a quarter-wave plate (quarter wave-plate) 80 and one polarization spectroscope (polarization beam splitter) 90 with optical element 12 (22) like the rear of routing eyeglass (line generator optics) in this wide-angle, in order to the spectroscope (beam splitter) 40 among the laser optics touch-control module 1b that replaces the 3rd embodiment; During use; The characteristic of two kinds of linearly polarized photons that thelaser beam 104a laser capable of using that this LASER Light Source 11 is sent is possessed; It is the linearly polarized light of P linearly polarized light (P-polarization) and S linearly polarized light (S-polarization) pairwise orthogonal; Through thispolarization spectroscope 90 time, making wherein, a linearly polarized light (being generally the P linearly polarized light) then reflects through another linearly polarized light (being generally the S linearly polarized light) with its quadrature fully fully; Again through this quarter-wave plate 80; The linear polarization that to pass through converts a circularly polarized light into and (claims left-handed or dextrorotation rotatory polarization; Left hand circular polarization/right hand circular polarization); If wherein convert the outgoing of left-handed (or dextrorotation) circularly polarized light into, will become dextrorotation (or left-handed) rotatory polarization after then reflecting via stopping of touching control, and reflected light earlier through this quarter-wave plate with convert into one with the line polarisation of former emerging ray polarisation quadrature; Being incident to this polarization spectroscope more also reflexes on thisposition sensor 21 fully; By this, can promote the service efficiency of light, promptly the service efficiency of this laser light energy is reached the maximization effect.

More than shown in be merely the preferred embodiments of the present invention, only be illustrative for the purpose of the present invention, and nonrestrictive.Understand the common knowledge personnel of this professional skill field tool, in spirit that claim of the present invention limited and scope, can carry out many changes, revise it, even equivalent change, but all will fall in protection scope of the present invention.

Claims (11)

Translated fromChinese

1.一种激光光学触控模块，设置于显示屏表面的一侧以提供光学式定位输入功能用以构成一光学式触控显示屏系统供触控件触摸，其由一发光部及一收光部组成一模块，其特征在于：1. A laser optical touch module, which is arranged on one side of the display surface to provide an optical positioning input function to form an optical touch display system for the touch element to touch, which consists of a light-emitting part and a light-receiving part Parts form a module, characterized in that:该发光部，其通过一激光光源以发出激光光束并经一广角用光学元件折射后，使激光光视角能大于90度，以在显示屏表面上形成广角的线性光束，当触控件触摸显示屏表面上时，会阻挡该线性光束并形成反射激光光束；The light-emitting part emits a laser beam through a laser light source and refracts it through a wide-angle optical element, so that the viewing angle of the laser light can be greater than 90 degrees, so as to form a wide-angle linear beam on the surface of the display screen. When the touch element touches the display screen When on a surface, this linear beam is blocked and a reflected laser beam is formed;该收光部，其通过一位置感测器及一聚光用光学元件以接收感应该反射激光光束并形成一信号输出，以感测得知该触控件的相对位置；The light-receiving part receives and senses the reflected laser beam through a position sensor and a concentrating optical element and forms a signal output to sense the relative position of the touch element;其中该发光部的光路与收光部的光路之间，以平行光路方式并排组合在一起。Wherein the light path of the light-emitting part and the light path of the light-receiving part are combined side by side in parallel light paths.2.如权利要求1所述的激光光学触控模块，其特征在于，该发光部的光路与收光部的光路之间，相对于显示屏表面，以水平且平行光路方式横向并排组合在一起。2. The laser optical touch module according to claim 1, wherein the light path of the light emitting part and the light path of the light receiving part are horizontally and parallelly combined with each other with respect to the surface of the display screen .3.如权利要求1所述的激光光学触控模块，其特征在于，该广角用光学元件是一打线镜片。3. The laser optical touch module according to claim 1, wherein the wide-angle optical element is a wire-bonded lens.4.如权利要求1所述的激光光学触控模块，其特征在于，该发光部及收光部容设在一有开口的外壳体内部以形成一组合体。4 . The laser optical touch module according to claim 1 , wherein the light-emitting part and the light-receiving part are accommodated inside an outer casing with an opening to form a combination.5.如权利要求1所述的激光光学触控模块，其特征在于，5. The laser optical touch module according to claim 1, characterized in that,该位置感测器的感测面上进一步设置一微透镜以使因触控件触摸显示屏表面上所形成的反射激光光束得进一步聚光在该感测面上。A microlens is further arranged on the sensing surface of the position sensor so that the reflected laser beam formed by the touch element touching the surface of the display screen can be further focused on the sensing surface.6.一种激光光学触控模块，设置于显示屏表面的一侧以提供光学式定位输入功能用以构成一光学式触控显示屏系统供触控件触摸，其由一发光部及一收光部组成一模块，其特征在于：6. A laser optical touch module, which is arranged on one side of the surface of the display screen to provide an optical positioning input function to form an optical touch display system for touch by touch elements, which consists of a light-emitting part and a light-receiving part Parts form a module, characterized in that:该发光部，其通过一激光光源以发出激光光束并经一广角用光学元件折射后，使激光光视角能大于90度，以在显示屏表面上形成广角的线性光束，当触控件触摸显示屏表面上时，会阻挡该线性光束并形成反射激光光束；The light-emitting part emits a laser beam through a laser light source and refracts it through a wide-angle optical element, so that the viewing angle of the laser light can be greater than 90 degrees, so as to form a wide-angle linear beam on the surface of the display screen. When the touch element touches the display screen When on a surface, this linear beam is blocked and a reflected laser beam is formed;该收光部，其通过一位置感测器以接收感应该反射激光光束并形成一信号输出，以感测得知该触控件的相对位置；The light receiving part receives and senses the reflected laser beam through a position sensor and forms a signal output to sense the relative position of the touch element;其中该发光部的光路与收光部的光路之间，以共光路方式组合在一起，使该发光部的激光光源与该收光部的位置感测器共用同一广角用光学元件，使该激光光源所发出的激光光束及位置感测器所接收并感应的反射激光光束都经过相同的广角用光学元件；Wherein the light path of the light emitting part and the light path of the light receiving part are combined together in a common optical path, so that the laser light source of the light emitting part and the position sensor of the light receiving part share the same wide-angle optical element, so that the laser The laser beam emitted by the light source and the reflected laser beam received and sensed by the position sensor all pass through the same wide-angle optical element;其中该广角用光学元件的后方设一分光镜以使激光光源所发出的激光光束穿过该分光镜而向外射出至广角用光学元件，并使反射激光光束经由该广角用光学元件射入至该分光镜并反射进入并被该位置感测器接收感应。Wherein the rear of the wide-angle optical element is provided with a beam splitter so that the laser beam emitted by the laser light source passes through the beam splitter and is emitted to the wide-angle optical element, and the reflected laser beam enters the wide-angle optical element through the wide-angle optical element. The beam splitter reflects and enters and is sensed by the position sensor.7.如权利要求6所述的激光光学触控模块，其特征在于，该广角用光学元件是一打线镜片。7. The laser optical touch module according to claim 6, wherein the wide-angle optical element is a wire-bonded lens.8.如权利要求6所述的激光光学触控模块，其特征在于，该发光部及收光部容设在一有开口的外壳体内部以形成一组合体。8 . The laser optical touch module as claimed in claim 6 , wherein the light-emitting part and the light-receiving part are accommodated inside an outer casing with an opening to form a combination.9.如权利要求6所述的激光光学触控模块，其特征在于，该激光光源与分光镜之间进一步设一准直镜。9. The laser optical touch module according to claim 6, wherein a collimating mirror is further arranged between the laser light source and the beam splitter.10.如权利要求6所述的激光光学触控模块，其特征在于，该激光光源进一步使用可发出小直径激光光束的激光光源，并进一步在该位置感测器的感测面与该分光镜之间设一光扩束镜。10. The laser optical touch module according to claim 6, wherein the laser light source further uses a laser light source capable of emitting a small-diameter laser beam, and further connects the sensing surface of the position sensor with the beam splitter An optical beam expander is arranged between them.11.如权利要求6所述的激光光学触控模块，其特征在于，该分光镜是一偏振分光镜，并在该广角用光学元件与该偏振分光镜之间设一四分之一波片，以使该激光光源所发出的激光光束在经过该一偏振分光镜时，该激光光束中的一线偏振光得通过该一偏振分光镜，而与其正交的另一线偏振光则反射；11. The laser optical touch module according to claim 6, wherein the beam splitter is a polarized beam splitter, and a quarter-wave plate is arranged between the wide-angle optical element and the polarized beam splitter so that when the laser beam emitted by the laser light source passes through the polarizing beam splitter, the linearly polarized light in the laser beam passes through the polarizing beam splitter, while the other linearly polarized light orthogonal to it is reflected;其中通过该一偏振分光镜的该线偏振光，再经该一四分之一波片转换为一左旋或右旋二相反旋中一圆偏振光，使经由触控件反射后的反射激光光束变为二相反旋中另一圆偏光，再经过该四分之一波片又转换为一与原线偏振光正交的线偏振光，再入射至该一偏振分光镜并反射至该位置感测器上。Wherein the linearly polarized light passing through the polarizing beam splitter is converted into a left-handed or right-handed two-phase circularly polarized light by the quarter-wave plate, so that the reflected laser beam reflected by the touch element becomes It is the other circularly polarized light in the two-phase rotation, and then converted into a linearly polarized light orthogonal to the original linearly polarized light through the quarter-wave plate, and then enters the polarization beam splitter and is reflected to the position sensor device.

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