CN102736753B - Photoelectric touch pen system - Google Patents
Photoelectric touch pen system Download PDFInfo
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- CN102736753B CN102736753B CN201210198157.0A CN201210198157A CN102736753B CN 102736753 B CN102736753 B CN 102736753B CN 201210198157 A CN201210198157 A CN 201210198157A CN 102736753 B CN102736753 B CN 102736753B
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Abstract
The invention discloses a kind of photoelectric touch pen system, there is the electronic equipment of contact panel including a pointer and one, described pointer include nib, a shell and be arranged in a shell with the first of described nib voltage conversion circuit that node is connected, the photoelectric sensor that is connected with described voltage conversion circuit；Described electronic equipment includes circuit for detecting, electrooptical device, Capacitance Coupled between the extraneous touch objects of described circuit for detecting detecting and the electrode of described contact panel, described electrooptical device, for transmitting photosignal with described circuit for detecting, can carry out signal transmission between described pointer and described electronic equipment.By the way, present configuration is simple, realizes wireless telecommunications remote control by optical signal and the electronic equipment with touch panel, and is easier to receive the optical signal of all angles, and detecting sensitivity is higher.
Description
Technical field
The present invention relates to a kind of touch pen system, particularly relate to a kind of photoelectric touch pen system.
Background technology
After being applied to various electronic product along with touch control screen, the pointer of corresponding electronic product is also arisen at the historic moment.Pointer is as a kind of common electronic installation operation instrument, and wherein as a example by the pointer being applied to capacitance touch control screen, it is mostly with metal material for a stature matter, and nib is based on soft conductive material, and simulating human finger touch senses whereby.Existing pointer is the most all arranged in electronic installation, when a stylus is used, only pointer need to be extracted in above-mentioned housing, the most just can control touch screen easily.But, owing to there being signal to be connected between pointer with electronic equipment, so often the one end in pointer has a connecting line to be connected with electronic equipment, and the length limitation of connecting line pointer indiscriminately ad. as one wishes uses, thus brings inconvenience to operator.For avoiding the problems referred to above, market also occurs in that some Wireless touch pens, but existing Wireless touch structure is complex, and induction sensitivity is the highest.
Generally, the diameter of pointer nib is the least, the most only the diameter of 2mm, it addition, nib material is typically all hard, the large contact area that himself condition requires with capacitance plate contradicts.The small capacitance variable quantity (signal that pen produces) that pointer produces is often such that the touch-control circuit in electronic equipment is difficult to distinguish it with the noise signal of calculating system itself, thus signal to noise ratio is on the low side.It addition, the signaling zone that the signal how pointer to be produced and finger produce also is separately a good problem to study.First, pointer produces small-signal and finger distance touch screen or touch pad farther out time generation small-signal can produce and obscure；Secondly, also can produce sensing amount when the hands that hold pointer touches touch screen or touch pad, the signal thus making detecting and tracking pointer produce becomes increasingly difficult to.
Therefore a kind of touch pen system is needed badly to overcome drawbacks described above.
Summary of the invention
The technical problem that present invention mainly solves is to provide a kind of photoelectric touch pen system, simple in construction, realizes wireless telecommunications remote control by optical signal and the electronic equipment with touch pad.
For solving above-mentioned technical problem, the technical scheme that the present invention uses is: provide a kind of photoelectric touch pen system, including one there is nib, the pointer of a shell and there is the electronic equipment of contact panel, described pointer includes the voltage conversion circuit being connected with described nib being arranged in a shell, the photoelectric sensor being connected with described voltage conversion circuit；Described electronic equipment includes circuit for detecting and the electrooptical device of described circuit for detecting transmission photosignal, Capacitance Coupled between the extraneous touch objects of described circuit for detecting detecting and the electrode of described contact panel, launched with the form of optical signal by described electrooptical device, it is converted into the signal of telecommunication after being received by described photoelectric sensor, and is transferred to described voltage conversion circuit to described nib.
The invention has the beneficial effects as follows: present configuration is simple, realizing wireless telecommunications remote control by optical signal and the electronic equipment with touch panel, and be easier to receive the optical signal of all angles, detecting sensitivity is higher.
Accompanying drawing explanation
Fig. 1 is the perspective view of touch pen system one of the present invention preferred embodiment；
Fig. 2 is the planar structure schematic diagram of shown pointer；
Fig. 3 is the calculation of measured data scatterplot of pointer under the influence of finger and forward potential change amount；
Fig. 4 is the calculation of measured data scatterplot of pointer under the influence of finger and reverse potential variable quantity；
Fig. 5 A is the scatter plot of data of each channel after a kind of derivation；
Fig. 5 B is the scatter plot of data of each channel after another kind of derivation；
Fig. 6 is the first preferred embodiment of light circulation way around display screen and clear layer；
Fig. 7 is the second preferred embodiment of light circulation way around display screen and clear layer；
Fig. 8 is the 3rd preferred embodiment of light circulation way around display screen and clear layer；
In accompanying drawing, the labelling of each parts is as follows: 1, pointer, and 10, nib, 11, a shell, 12, photoelectric sensor, 13, printing opacity polygonal crystal, 14, reflecting piece, 15, voltage conversion circuit, 2, electronic installation, 20, touch panel, 201, clear layer, 202, display screen, 204, electrode, 21, circuit for detecting, 22, electrooptical device.
Detailed description of the invention
Below in conjunction with the accompanying drawings presently preferred embodiments of the present invention is described in detail, so that advantages and features of the invention can be easier to be readily appreciated by one skilled in the art, thus protection scope of the present invention is made apparent clear and definite defining.
Referring to Fig. 1, the embodiment of the present invention includes:
A kind of photoelectric touch pen system, including: a pointer and has the electronic equipment of contact panel, and described pointer includes nib, a shell and is arranged on the voltage conversion circuit in a shell, photoelectric sensor；Described electronic equipment includes circuit for detecting, electrooptical device, described circuit for detecting measures the Capacitance Coupled between extraneous touch objects and the electrode of described contact panel, described electrooptical device is used for and described circuit for detecting synchronous transfer photosignal, can carry out signal transmission between described pointer and described electronic equipment.
First, specifically introduce the structure of pointer, refer to shown in Fig. 2.Described pointer include nib, a shell and be arranged in a shell with the first of described nib voltage conversion circuit that node is connected, the photoelectric sensor that is connected with described voltage conversion circuit, described nib is convex to be exposed to outside described shell.
Part the shell of described pointer is made up of the material can pass through for the light of signal transmission, wherein, a shell in the range of described nib 5cm is made up of the material can pass through for signal transmission, described material has scattering function, this part shell is built with described photoelectric sensor, described photoelectric sensor is used for receiving or send optical signal or the signal of telecommunication, on the one hand this design can make pointer receive the optical signal from described electronic equipment surface equably, on the other hand, when holding pointer, can avoid hands that pointer is received the shielding of optical signal.Described photoelectric sensor transmits with described voltage conversion circuit signal.A part for described pointer shell is made up of the material of different refractivity, as in figure 2 it is shown, in this embodiment, equipped with a printing opacity polygonal crystal inside this part shell, or described printing opacity polygonal crystal is structure as a whole with this part shell, and it is made up of the material of different refractivity；Inner surface at described shell is provided with several reflecting piece, light is launched inside described shell by described reflecting piece, in this embodiment, described reflecting piece is strip, in array type arrangement at the shell inner surface at described nib, fineness according to described pointer and the placed angle of described photoelectric sensor, the arrangement scope of described reflecting piece and mode can set as required, reflection through described reflecting piece, make the radiation direction within the described pointer of entrance change, thus light is easier to be sensed by described photoelectric sensor.In the light of different incidence angles injects a shell, refraction action and the reflection of described reflecting piece through described printing opacity polygonal crystal, the light of different angles finally aggregates into unidirectional some bundle light and is sensed by described photoelectric sensor, thus expand described pointer and receive the angle of light so that it is also significantly improve with the sensing susceptiveness of described electronic equipment.
The nib of described pointer does globulate, so can ensure the good contact of all angles when contacting the contact panel of described electronic equipment, that is to say and can guarantee that a lasting Capacitance Coupled, unrelated with the angle that described pointer and described electronic equipment are formed.Owing to the contact area of the contact panel of described written and described electronic equipment is the least, a small electric capacity can only be produced, described voltage conversion circuit produces an electromotive force being increased or decreased in time to nib, as long as suitably controlling the size and Orientation of potential change amount, so that the electric capacity of described pointer seem more greatly, less, even occur a negative value effect.
Secondly, described pointer must coordinate an electronic equipment with contact panel, introduces described electronic equipment in detail below.
Described electronic equipment includes that computer, panel computer, phone, drawing board etc. have screen or do not have screen.On the contact panel of described electronic equipment, it is usually constructed with many electrode groups or electrod-arrays, certain electric capacity is had between electrode, electric capacity is there is also between described electrode and extraneous touch objects (such as pointer, finger), once finger or pointer sufficiently close to described contact panel, extra electric capacity may be introduced on neighbouring electrode, and described circuit for detecting i.e. measures the Capacitance Coupled between extraneous touch objects and the electrode of described contact panel.Specifically, it is the process of an iteration for the scanning process of electrode capacitance, after in described electrode group or electrod-array, all of electrode is scanned successively, scanning process can restart by first electrode from sequence, so scan successively many times, then arising that the calculation of measured data of a lot of group, described calculation of measured data can be processed by described circuit for detecting collection.Described voltage conversion circuit can generate potential change amount (being increased or decreased) and export as it, and described potential change amount can drive described nib.Amplitude and the direction of described potential change amount can control.According to the described calculation of measured data of difference group, described nib can be driven by the potential change amount of various amplitude or different directions.
After collecting the many groups calculation of measured data being over described, described circuit for detecting can go to distinguish finger signal and the signal of pen, and this process distinguished is controlled by a mathematical function.In conjunction with seeing accompanying drawing 3 and accompanying drawing 4, representing two groups of different data respectively, they all contain the described calculation of measured data of each channel, and these data described are the most all discrete points.Data in accompanying drawing 3 and in accompanying drawing 4 are made derivation respectively and are processed, two can be obtained and be referred to as organizing B such as accompanying drawing 5A (referred to as organizing A) and 5B() described in scatterplot, the vertical coordinate of former data in two figures is just as because they reaction be finger produce impact.For described nib, but being driven by two identical potential change amounts in opposite direction of absolute value, the size of data then reacting the impact of described pointer in two groups is of substantially equal, and direction is but contrary.Described mathematical function can be retained by the computing of group A+ group B and represents the data of finger impact and elimination represents the data of described pointer impact, and the data vertical coordinate that this interval scale finger affects becomes about original twice.Same, in order to retain the data representing the impact of described pointer, described mathematical function can carry out organizing the computing of A-group B.Further, if in two groups, the data reacting the impact of described pointer are not identical absolute value, described mathematical function even can carry out organizing A+n0* group B or the computing of group A-n1* group B, the purpose of parameter n0 and n1 is exactly to eliminate finger or the impact of pen as far as possible, its size depends on the ratio of the vertical coordinate of data in two groups, is the most also dependent on the amplitude of described potential change amount.
Described electrooptical device is used for and described circuit for detecting synchronous transfer photosignal, and described electrooptical device and the structure of described circuit for detecting and relation can be diversified.Usually, described circuit for detecting is masters, and electrooptical device is driven side, and the most described circuit for detecting produces the signal of telecommunication and is sent to described electrooptical device, described electrooptical device launch with the form of optical signal；But also having the relation of other form, the most described circuit for detecting and described electrooptical device can be all the driven sides of third party's control circuit or integrated circuit, the two circuit cooperating is also controlled by described third party's control circuit or integrated circuit.For in theory, described electrooptical device can also do masters in both sides relation, and described circuit for detecting is driven side, and the most described electrooptical device receives optical signal, and the signal of telecommunication is sent to described circuit for detecting.For both relations, there is a variety of probabilities, should be construed as being included in protection scope of the present invention.In a preferred embodiment of the invention, described circuit for detecting is masters, and described electrooptical device is driven side.Although the mode of both sides relation can be different, but both can follow a common principle, specifically, this principle is just a need for Tong Bu with masters for driven side.In the present invention, described synchronized relation has various ways, such as, described masters can be described pointer or described electronic equipment, and masters emits beam, and driven side receives light, in a preferred embodiment of the invention, described pointer is to receive the driven side of light.
Discussing described touch pen system in detail below is how propagating optical signal or the signal of telecommunication.The wavelength of described optical signal is substantially at outside human visible range, such as infrared ray, bluetooth, WiFi etc., propagates between described photoelectric sensor and described electrooptical device.Optical signal between pointer and electronic equipment is carried on pulse signal by described electrooptical device, corresponding optical signal is represented with the pulse of different level or distinct pulse widths or cycle, and the steady state time of optical signal is short described in the peak pulse duration of described pulse signal, i.e. in a steady state time of optical signal, it is possible to exactly the transformation of optical signal state is reflected on pulse signal.Illustrating, ultrared transmitting and ultrared do not launch two states i.e. representing optical signal, both states can be reflected in high level or low level.So, the optical signal that described pointer receives is propagated the most in the electronic device, refers to Fig. 6-Fig. 8.Described contact panel includes a display screen and is located at the clear layer on described display screen, and light has multiple circulation way around described display screen and clear layer.In embodiment one, described electronic equipment at least includes a photoelectric device (not indicating in figure), as shown in Figure 6, in described photoelectric device can make light gap between described display screen and described clear layer, is parallel to described display screen and propagates；In embodiment two, described electronic equipment at least includes a light emitting devices (not indicating in figure), described light emitting devices may pass through described clear layer throw light, as shown in Figure 7, light passes described clear layer, propagating along described display screen edge, light also can be launched at described display screen simultaneously, outwards propagates through described clear layer；In embodiment three, as shown in Figure 8, light emission is concentrated mainly on inside described clear layer；In embodiment four, being added with the light of signal vehicle in the white backlight of described display screen, described light is shown the scattering material of screen and is scattered, by above-mentioned several ways, make light be covered with whole system, signal can be covered in large area, thus be easier to by described pointer induced signal.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the invention and accompanying drawing content to be made or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, the most in like manner it is included in the scope of patent protection of the present invention.
Claims (17)
1. a photoelectric touch pen system, including one there is nib, the pointer of a shell and there is the electronic equipment of contact panel, it is characterized in that, described pointer includes the voltage conversion circuit being connected with described nib being arranged in a shell, the photoelectric sensor being connected with described voltage conversion circuit；Described electronic equipment includes circuit for detecting and the electrooptical device of described circuit for detecting transmission photosignal, Capacitance Coupled between the extraneous touch objects of described circuit for detecting detecting and the electrode of described contact panel, being launched with the form of optical signal by described electrooptical device, described optical signal is propagated between described photoelectric sensor and described electrooptical device.
Photoelectric touch pen system the most according to claim 1, it is characterised in that part the shell of described pointer is made up of the material can pass through for the light of signal transmission.
Photoelectric touch pen system the most according to claim 2, it is characterised in that the shell at described nib is made up of the material can pass through for the light of signal transmission, and described material has scattering function.
Photoelectric touch pen system the most according to claim 2 a, it is characterised in that part for a shell of described pointer is made up of the material of different refractivity, and its refractive index is different from air refraction.
Photoelectric touch pen system the most according to claim 2, it is characterised in that the inner surface at described shell is provided with several reflecting piece, light is reflected towards inside described shell by described reflecting piece.
Photoelectric touch pen system the most according to claim 1, it is characterised in that described photoelectric sensor is in outside human visible range substantially with the wavelength of the light wave of described electrooptical device transmission.
Photoelectric touch pen system the most according to claim 1, it is characterised in that the optical signal between pointer and electronic equipment is carried on pulse signal by described electrooptical device.
Photoelectric touch pen system the most according to claim 7, it is characterised in that described in the peak pulse duration of described pulse signal, the steady state time of optical signal is short.
Photoelectric touch pen system the most according to claim 1, it is characterised in that described contact panel includes a display screen and is located at the clear layer on described display screen, light has multiple circulation way around described display screen and clear layer.
Photoelectric touch pen system the most according to claim 9, it is characterised in that in described electronic equipment at least includes that a photoelectric device, described photoelectric device can make light gap between described display screen and described clear layer, is parallel to described display screen and propagates.
11. photoelectric touch pen system according to claim 9, it is characterised in that described electronic equipment at least includes that a light emitting devices, described light emitting devices may pass through described clear layer throw light.
12. photoelectric touch pen system according to claim 9, it is characterised in that light emission is concentrated mainly on inside described clear layer.
13. photoelectric touch pen system according to claim 9, it is characterised in that be added with the light of signal vehicle in the white backlight of described display screen, described light is shown the scattering material of screen and is scattered.
14. photoelectric touch pen system according to claim 1, it is characterised in that described voltage conversion circuit produces an electromotive force being increased or decreased in time to described nib.
15. photoelectric touch pen system according to claim 14, it is characterized in that, described circuit for detecting can obtain several fingers or the measurement result of described pointer, and for each measurement result, the nib of described pointer is driven by the potential change amount in various amplitude or direction.
16. photoelectric touch pen system according to claim 15, it is characterized in that, described circuit for detecting is distinguished finger and is controlled by a kind of mathematical function with the measurement result of pointer, described mathematical function can make that finger impact is cancelled and the impact of described pointer is retained, and calculates the data made new advances.
17. photoelectric touch pen system according to claim 15, it is characterized in that, described circuit for detecting is distinguished finger and is controlled by a kind of mathematical function with the measurement result of pointer, and described mathematical function can make that the impact of described pointer is cancelled and finger impact is retained, and calculates new data.
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| CN201210198157.0A CN102736753B (en) | 2012-06-15 | 2012-06-15 | Photoelectric touch pen system |
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| CN201210198157.0A CN102736753B (en) | 2012-06-15 | 2012-06-15 | Photoelectric touch pen system |
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| CN102736753A CN102736753A (en) | 2012-10-17 |
| CN102736753B true CN102736753B (en) | 2016-12-21 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102968196B (en) * | 2012-11-29 | 2016-01-27 | 苏州瀚瑞微电子有限公司 | A kind of wireless signal transmission method of capacitance pen system |
| CN104571732B (en) * | 2013-10-14 | 2018-09-21 | 深圳市汇顶科技股份有限公司 | Touch terminal, active stylus detection method and system |
| TWI511006B (en) * | 2014-02-07 | 2015-12-01 | Wistron Corp | Optical imaging system and imaging processing method for optical imaging system |
| TWI511008B (en) * | 2014-05-26 | 2015-12-01 | Wistron Corp | Touch detection method and optical touch system thereof |
| JP6487694B2 (en) * | 2014-12-26 | 2019-03-20 | 株式会社ワコム | Position indicator and signal processing device |
| TWI582654B (en) * | 2015-06-17 | 2017-05-11 | 宏碁股份有限公司 | Electronic device and touch report method thereof |
| CN106406636B (en) * | 2016-06-30 | 2019-06-11 | 广州视睿电子科技有限公司 | Touch input device, touch screen, touching application method and its system |
| KR102203186B1 (en) * | 2016-10-27 | 2021-01-15 | 서크 코퍼레이션 | Finger tracking on input devices with proximity detection |
| CN112631439A (en) * | 2020-12-10 | 2021-04-09 | 安徽鸿程光电有限公司 | Touch control pen |
| CN113050811B (en) * | 2021-03-30 | 2023-12-26 | 联想(北京)有限公司 | Electronic equipment and input equipment |
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| CN201247448Y (en) * | 2008-08-14 | 2009-05-27 | 联想(北京)有限公司 | Portable electronic equipment and writing pencil |
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