CN201853211U - Laser Optical Touch Module - Google Patents
Laser Optical Touch Module Download PDFInfo
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- CN201853211U CN201853211U CN201020298621XU CN201020298621U CN201853211U CN 201853211 U CN201853211 U CN 201853211U CN 201020298621X U CN201020298621X U CN 201020298621XU CN 201020298621 U CN201020298621 U CN 201020298621U CN 201853211 U CN201853211 U CN 201853211U
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Abstract
A laser optical touch module is arranged on one side of the surface of a display screen to provide an optical positioning input function for forming an optical touch display screen system, and the module consists of a light emitting part and a light receiving part, and is characterized in that: the light emitting part emits laser beams through a laser light source, and after the laser beams are refracted by a wide-angle optical element, the visual angle of the laser beams is larger than 90 degrees, so that wide-angle linear beams are formed on the surface of the display screen, and when the touch control part touches the surface of the display screen, the linear beams are blocked and reflected laser beams are formed; the light-receiving part receives and senses the reflected laser beam and forms a signal output through a position sensor and a light-gathering optical element so as to sense and know the relative position of the touch control piece; the light paths of the light emitting part and the light receiving part are combined together in a parallel light path mode or a common light path mode; therefore, the high coherence (high coherence light) of the laser beam can be utilized to improve the touch sensitivity, and the trouble that the prior art needs to adopt the reflective strip or the light absorption strip is avoided.
Description
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 every function of control display as clicking operation, image switching or amplification/dwindle picture etc., as finger or pointer by 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 is for being applied to the large scale display screen, advantage with cost, 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 (following) at 15 o'clock.
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, as on the four side frame limits on a 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) in the staggered mode of sensing direction; Then when a touching control, as 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 is radiated at the entire display screen surface, see through the reflex of this reflecting strips or the absorption of extinction bar this moment, can by this at least dibit put sensor is learnt these touching control at least two directions with sensing relative position, calculation function by 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 in design, light-emitting diode) as light source, 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 has complex structure, shortcomings such as cost increase, especially the irradiates light that provided of this led light source device is generally visible light, be subjected to 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.
As from the foregoing, 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
The purpose of this utility model is to provide a kind of laser optics touch-control module, a side that is arranged at display screen surface touches for touching control in order to constitute an optical touch control display screen system so that optical profile type location input function to be provided, it forms a module by an illuminating part and a light absorbing part, it is characterized in that:
This illuminating part, its by a LASER Light Source with send laser beam and through a wide-angle with after the optical element refraction, the laser light visual angle can be spent greater than 90, on display screen surface, to form the linear light beam of wide-angle, when on the touching control touch display screen surface, can stop this linear light beam and form reflect beams of laser light;
This light absorbing part, it is exported to receive this reflect beams of laser light of induction and to form a signal with optical element by a position sensor and an optically focused, learns the relative position of this touching control with sensing;
Wherein between the light path of the light path of this illuminating part and light absorbing part, combine side by side in the parallel light path mode.
During enforcement, between the light path of this illuminating part and the light path of light absorbing part,, laterally combine side by side with level and parallel light path mode with respect to display screen surface.
During enforcement, this wide-angle optical element is a routing eyeglass.
During enforcement, this illuminating part and light absorbing part are installed with one has the shell body inside of opening to form an assembly.
During enforcement, on the sensing face of this position sensor a lenticule is set further so that get further optically focused on this sensing face because of formed reflect beams of laser light on the touching control touch display screen surface.
Another purpose of the present utility model is to provide a kind of laser optics touch-control module, a side that is arranged at display screen surface touches for touching control in order to constitute an optical touch control display screen system so that optical profile type location input function to be provided, it forms a module by an illuminating part and a light absorbing part, it is characterized in that:
This illuminating part, its by a LASER Light Source with send laser beam and through a wide-angle with after the optical element refraction, the laser light visual angle can be spent greater than 90, on display screen surface, to form the linear light beam of wide-angle, when on the touching control touch display screen surface, can stop this linear light beam and form reflect beams of laser light;
This light absorbing part, it to receive this reflect beams of laser light of induction and to form signal output, learns the relative position of this touching control by a position sensor with sensing;
Wherein between the light path of the light path of this illuminating part and light absorbing part, combine to be total to the light path mode, make the LASER Light Source of this illuminating part and the shared same wide-angle optical element of position sensor of this light absorbing part, make laser beam that this LASER Light Source sends and the reflect beams of laser light that position sensor received and responded to all pass through identical wide-angle optical element;
Wherein this wide-angle is established a spectroscope with the rear of optical element so that the laser beam that LASER Light Source is sent passes this spectroscope and outwards penetrates to the wide-angle optical element, and makes reflect beams of laser light be incident upon this spectroscope and reflection via this wide-angle with optical element to enter and received induction by this position sensor.
During enforcement, this wide-angle optical element is a routing eyeglass.
During enforcement, this illuminating part and light absorbing part are installed with one has the shell body inside of opening to form an assembly.
During enforcement, further establish a collimating mirror between this LASER Light Source and the spectroscope.
During enforcement, the further use of this LASER Light Source can be sent the LASER Light Source of minor diameter laser beam, and further establishes a smooth beam expanding lens between the sensing face of this position sensor and this spectroscope.
During enforcement, this spectroscope is a polarization spectroscope, and between this wide-angle is with optical element and this polarization spectroscope, establish a quarter-wave plate, so that the laser beam that this LASER Light Source is sent is through this polarization spectroscope the time, linearly polarized light in this laser beam must pass through this polarization spectroscope, then reflects with another linearly polarized light of its quadrature;
Wherein pass through this linearly polarized light of this polarization spectroscope, be converted to a circularly polarized light in the left-handed or dextrorotation two-phase derotation through this quarter-wave plate again, make via the reflect beams of laser light after the touching control reflection and become another rotatory polarization in the two-phase derotation, again through this quarter-wave plate be converted to again one with the linearly polarized light of former linearly polarized light quadrature, be incident to this polarization spectroscope again and reflex on this position sensor.
Description of drawings
Fig. 1 is that laser optics touch-control module first embodiment of the present invention (transmitting-receiving parallel light path) is arranged at a side of display screen surface 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 describe in 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 on display screen 2 surfaces, in order to optical profile type location input function to be provided, for can form an optical touch control system on this display screen 2; Generally speaking, on the periphery on display screen 2 surfaces dual-laser optical touch module 1 at least must be set, respectively establish a laser optics touch-control module 1 as the adjacent two jiaos of places at display screen 2 lateral margins, wherein the sensing direction of the position sensor (camera) that had of each laser optics touch-control module 1 forms interlace mode on these display 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 an illuminating part 10 and a light absorbing part 20, this illuminating part 10 and light absorbing part 20 can be installed with in a shell body 30 inside to form an assembly again, and the shape of this shell body 30 does not limit, and which is provided with opening corresponding to the light path of this illuminating part 10 and light absorbing part 20 as an illuminating part opening 301 and a light absorbing part opening 302.This illuminating part 10 mainly by a LASER Light Source 11 with send laser beam and through a wide-angle with optical element 12 as the refraction of routing eyeglass (line generator optics), make the laser light visual angle (light fan) after the refraction can be as shown in Figure 1, on display screen 2 surfaces, to form the linear light beam 101 of wide-angle greater than 90 degree; When go up on touching control 3 touch display screens 2 surfaces, can stop this linear light beam 101 and form reflect beams of laser light 102; 20 of this light absorbing parts by a position sensor 21 to receive and to respond to this reflect beams of laser light 102, to learn the relative position of this touching control 3 on a corresponding optical axis 103 at sensing on the sensing face of position sensor 21; Shown in Figure 1A, the reflect beams of laser light 102 that these touching control 3 positions are produced can produce reaction and form signal output on pixel (active pixel) axle of position sensor 21, learn with sensing and the relative position of these touching control 3 at least two directions can touch at display screen 2 lip-deep physical location coordinates to learn this touching control 3 and put sensor 21 by the calculation function of treatment circuit by dibit at least; Because this position sensor 21 or wide-angle utilize present electronic technology or prior art to reach with optical element 12 as 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 the schematic perspective view of laser optics touch-control module first embodiment of the present invention (transmitting-receiving parallel light path) and plane (on look) synoptic diagram.And Fig. 2,3 illustrated embodiments (transmitting-receiving parallel light path) just are used for illustrating 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 Light Source 11 to be combined into a module as the illuminating part 10 of infrared laser (IR LD) and the light absorbing part 20 of a tool position sensor 21, so that this LASER Light Source 11 and position sensor 21 can be located at the homonymy position of a side on display screen 2 surfaces, wherein this illuminating part 10 comprises a laser diode (laser diode) 111 and one first order optical element (1 by a LASER Light Source 11
StOptics) 112, send laser beam and through a wide-angle with optical element 12 as the refraction of routing eyeglass (line generator optics), make the light visual angle (light fan) after the refraction can be as shown in Figure 3, on display screen 2 surfaces, to form the linear light beam 101 of wide-angle shown in Fig. 1,3 greater than 90 degree; This light absorbing part 20 receive with optical element 22 by a position sensor 21 and an optically focused and respond to that this linear light beam 101 is subjected to stopping of touching control 3 and laser light reflected light beam 102 as shown in Figure 1, learn the relative position of this touching 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 designs simplification, installation and the highly sensitive use effect of touch-control easily.
With reference to shown in the figure 2,3, the laser optics touch-control module 1 of this first embodiment is formed a module by an illuminating part 10 and a light absorbing part 20 again, and this illuminating part 10 and light absorbing part 20 can be installed with in a shell body 30 inside to be combined into the use sample attitude of a module again; This shell body 30 is provided with the opening corresponding to the light path of this illuminating part 10 and light absorbing part 20, comprise an illuminating part opening 301 and a light absorbing part opening 302 as Fig. 1, shown in 2, wherein between the light path of the light path of this illuminating part 10 and light absorbing part 20, be between the light path of LASER Light Source 11 and position sensor 21, that is between this illuminating part opening 301 and the light absorbing part opening 302, combine side by side in the parallel light path mode, with this first embodiment such as Fig. 2, shown in 3, laterally combine side by side with level (with respect to display screen 2 surfaces) and parallel light path mode between the light path of the light path of this illuminating part 10 and light absorbing part 20 but do not limit, as with vertical (with respect to display screen 2 surfaces) and parallel light path mode up and down tile vertically combine (figure shows).
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 an illuminating part 10 and a light absorbing part 20, and this illuminating part 10 and light absorbing part 20 can be installed with in a shell body 30 inside to be combined into the use sample attitude of a module again; In this second embodiment, between the light path of the light path of this illuminating part 10 and light absorbing part 20, be between the light path of LASER Light Source 11 and position sensor 21, combine to be total to the light path mode, so set light path opening on the shell body 30 of this second embodiment corresponding to this illuminating part 10 and light absorbing part 20, as illuminating part opening 301 and the light absorbing part opening 302 of first embodiment, on shell body 30, form shared same opening 301 (302) and pass through for the LASER Light Source 11 and the light path of position sensor 21; Pass through the common light path mode of this second embodiment again, make the LASER Light Source 11 of this illuminating part 10 can use optical element 12 (22) as routing eyeglass (line generator optics) by shared same wide-angle with the position sensor 21 of this light absorbing part 20, be the laser beam 101 that sends of LASER Light Source 11 and reflect beams of laser light 102 that position sensor 21 received and responded to 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 as a 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 the laser beam 101 that LASER Light Source 11 is sent passes this spectroscope 40 to wide-angle with optical element 12 (22), and can reflect when making reflect beams of laser light 102 be incident upon this spectroscope 40 with optical element 12 (22) and enter and received and respond to by this position sensor 21 via this wide-angle; And this second embodiment is by being total to the structure of light path mode, can save this position sensor 21 originally institute must wide-angle usefulness optical element 22, promptly the reverse optical path of this routing eyeglass (line generator optics) can produce the effect as a wide-angle imaging eyeglass (angle of visibility＞90 degree), and can avoid the optical aberration of this wide-angle with optical element 22, the i.e. optical distortion in peripheral outfield (optical distortion).Between this LASER Light Source 11 and spectroscope (beam splitter) 40, further can establish a collimating mirror (collimator) 50 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 using optical element 12 (22) as the linear light beam of routing eyeglass (line generator optics) by this wide-angle again with formation wide-angle on display screen surface.
Again with reference to shown in the figure 4,5, one lenticule (Mirco Lens) 60 further can be set on the sensing face 211 of this position sensor 21, the effect of this lenticule (Mirco Lens) 60 is as the complementary metal oxide semiconductor (CMOS) sensor (CMOS) of commercial usefulness, can make the touching control 3 touch-controls laser beam that the position Ф 4 among position Ф 1～Ф N is produced on corresponding optical axis 103 102 further optically focused on sensing face 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 of minor diameter laser 104a, to promote this wide-angle astigmatic efficient of optical element 12 (22) as the routing eyeglass; This moment is at sensing face 211 front ends of this position sensor 21, promptly between this position sensor 21 and the spectroscope 40, further establish a smooth beam expanding lens (beam expander optics) 70, expand into larger-diameter laser beam in order to reflect beams of laser light 102a and reenter the sensing face 211 that is incident upon position sensor 21 minor diameter, effectively to utilize the image-generating unit on this position sensor 21 (is pixel, 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) as 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 laser beam 104a that this LASER Light Source 11 is sent can utilize the characteristic of two kinds of linearly polarized photons that laser possesses, 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 90 time, making wherein, a linearly polarized light (being generally the P linearly polarized light) then reflects fully by another linearly polarized light (being generally the S linearly polarized light) with its quadrature fully; Again through this quarter-wave plate 80, the linear polarization that to pass through is converted to a circularly polarized light and (claims left-handed or dextrorotation rotatory polarization, left hand circular polarization/right hand circular polarization), if wherein be converted to the outgoing of left-handed (or dextrorotation) circularly polarized light, to become dextrorotation (or left-handed) rotatory polarization after then reflecting via stopping of touching control, and reflected light earlier through this quarter-wave plate be converted to one with the line polarisation of former emerging ray polarisation quadrature, being incident to this polarization spectroscope more also reflexes on this position 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 only be the preferred embodiments of the present invention, only be illustrative for the purpose of the present invention, and nonrestrictive.Common knowledge personnel understand at this professional skill field tool, can carry out many changes to it in the spirit and scope that claim of the present invention limited, revise, even the change of equivalence, but all will fall within the scope of protection of the present invention.
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| CN201020298621XU CN201853211U (en) | 2010-08-20 | 2010-08-20 | Laser Optical Touch Module |
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| CN201020298621XU CN201853211U (en) | 2010-08-20 | 2010-08-20 | Laser Optical Touch Module |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102375615A (en) * | 2010-08-20 | 2012-03-14 | 硕擎科技股份有限公司 | Laser Optical Touch Module |
| CN103336313A (en) * | 2013-06-14 | 2013-10-02 | 业成光电（深圳）有限公司 | Infrared detection device and portable electronic equipment |
| US9880668B2 (en) | 2013-09-11 | 2018-01-30 | Beijing Lenovo Software Ltd. | Method for identifying input information, apparatus for identifying input information and electronic device |
| CN114341674A (en) * | 2019-08-08 | 2022-04-12 | 麻省理工学院 | Ultra-wide view field planar optical device |
-
2010
- 2010-08-20 CN CN201020298621XU patent/CN201853211U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102375615A (en) * | 2010-08-20 | 2012-03-14 | 硕擎科技股份有限公司 | Laser Optical Touch Module |
| CN103336313A (en) * | 2013-06-14 | 2013-10-02 | 业成光电（深圳）有限公司 | Infrared detection device and portable electronic equipment |
| CN103336313B (en) * | 2013-06-14 | 2016-08-17 | 业成光电（深圳）有限公司 | Infrared light detection device and portable electron device |
| US9880668B2 (en) | 2013-09-11 | 2018-01-30 | Beijing Lenovo Software Ltd. | Method for identifying input information, apparatus for identifying input information and electronic device |
| CN104423564B (en) * | 2013-09-11 | 2018-03-27 | 联想(北京)有限公司 | Input information identifying method, device and electronic equipment |
| CN114341674A (en) * | 2019-08-08 | 2022-04-12 | 麻省理工学院 | Ultra-wide view field planar optical device |
| US12212853B2 (en) | 2019-08-08 | 2025-01-28 | Massachusetts Institute Of Technology | Ultra-wide field-of-view flat optics |
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