CN107831944B - Touch display system - Google Patents
Touch display system Download PDFInfo
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- CN107831944B CN107831944B CN201711220369.3A CN201711220369A CN107831944B CN 107831944 B CN107831944 B CN 107831944B CN 201711220369 A CN201711220369 A CN 201711220369A CN 107831944 B CN107831944 B CN 107831944B
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- 238000001514 detection method Methods 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims description 29
- 238000004891 communication Methods 0.000 claims description 4
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- 230000003321 amplification Effects 0.000 description 9
- 238000003199 nucleic acid amplification method Methods 0.000 description 9
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/046—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by electromagnetic means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention discloses a touch display system, comprising: the device comprises an electromagnetic screen, a capacitive screen, a display screen, a host control module, a temperature detection module and an electromagnetic screen control module; the electromagnetic screen is arranged below the capacitive screen, and the display screen is arranged below the electromagnetic screen; the temperature detection module is used for detecting the working temperature of the touch display system in the current working environment and outputting temperature data corresponding to the temperature to the electromagnetic screen control module; the electromagnetic screen control module is used for adjusting the gain multiple of the writing signal received from the electromagnetic screen according to the received temperature data so as to gain the signal amplitude of the received writing signal to the signal amplitude corresponding to the gain multiple and outputting the gained writing signal to the host computer control module; and the host control module is used for receiving the gained writing signal and transmitting the received writing signal to the display to display the writing handwriting. By adopting the embodiment of the invention, the condition of line breakage during writing at low temperature can be avoided, and the writing sensitivity is improved.
Description
Technical Field
The invention relates to the technical field of multimedia, in particular to a touch display system.
Background
In the field of a capacitor + electromagnetic interactive intelligent panel and a conference panel, a capacitor screen and an electromagnetic screen are simultaneously arranged for touch control, wherein the capacitor screen is used for receiving touch signals without an electromagnetic pen, and the electromagnetic screen is used for receiving touch signals under the electromagnetic pen. The capacitance screen under the existing nano silver wire technology can enable electromagnetic waves to pass through the etched nano silver wire grids in a normal state, so that a coil of an antenna plate of the electromagnetic screen can receive electromagnetic wave signals sent by an electromagnetic pen, and the electromagnetic screen can write normally without being influenced by the capacitance screen.
However, when the smart tablet works in a working environment below zero, the related characteristics of the nano silver wire process capacitive screen are changed, when the electromagnetic wave emitted by the electromagnetic pen passes through the capacitive screen, signals of the electromagnetic wave in a partial area are attenuated and weakened by the capacitive screen, so that the signals received by the antenna board of the electromagnetic screen are weakened, and at the moment, the phenomenon is that the electromagnetic screen is broken in a partial area of the whole machine.
Disclosure of Invention
The touch display system provided by the embodiment of the invention can avoid the situation of line breakage during writing at low temperature and improve the writing sensitivity.
An embodiment of the present invention provides a touch display system, including: the device comprises an electromagnetic screen, a capacitive screen, a display screen, a host control module, a temperature detection module and an electromagnetic screen control module;
the temperature detection module is used for detecting the working temperature of the touch display system in the current working environment and outputting temperature data corresponding to the temperature to the electromagnetic screen control module;
the electromagnetic screen control module is used for adjusting the gain multiple of the writing signal received from the electromagnetic screen according to the received temperature data so as to gain the signal amplitude of the received writing signal to the signal amplitude corresponding to the gain multiple, and outputting the gained writing signal to the host control module;
and the host control module is used for receiving the gained writing signal and transmitting the received writing signal to a display to display the writing handwriting.
Preferably, the temperature detection module is a temperature sensor.
Further, the electromagnetic screen control module comprises a signal conversion unit and a micro control unit;
the micro control unit is used for receiving the temperature data output by the temperature detection module, determining a gain multiple to be set by the signal conversion unit according to the received temperature data, and outputting the gain multiple to the signal conversion unit;
the signal conversion unit is used for receiving the gain multiple output by the micro control unit, adjusting the currently set gain multiple into the received gain multiple, receiving a writing signal from the electromagnetic screen, gaining the signal amplitude of the writing signal to the signal amplitude corresponding to the currently set gain multiple according to the currently set gain multiple, and outputting the gained writing signal to the micro control unit;
and the micro control unit is used for outputting the received gained writing signal to the host control unit.
Further, the determining a gain multiple set by the signal conversion unit according to the received temperature data specifically includes:
judging whether the temperature value corresponding to the current moment is greater than a preset temperature threshold value or not according to the received temperature data; preferably, the preset temperature threshold is zero degrees centigrade.
If yes, determining that the gain multiple to be set by the signal conversion unit is a first gain multiple;
if not, determining that the gain multiple to be set by the signal conversion unit is a second gain multiple; wherein the second gain factor is greater than the first gain factor.
Further, the touch display system also comprises a capacitive screen control module;
the capacitive screen control module is used for receiving writing signals from the capacitive screen and transmitting the writing signals to the host control unit, so that the host control unit transmits the writing signals to the display to display writing.
Furthermore, the communication connection between the micro control unit and the host control unit is a USB connection, and the micro control unit outputs the received gained writing signal to the host control unit through the USB connection.
Further, the writing signal comprises coordinate data of the electromagnetic pen touching the electromagnetic screen.
The embodiment of the invention has the following beneficial effects:
according to the touch display system provided by the embodiment of the invention, the temperature detection module is added in the electromagnetic screen control module of the original touch display system, the gain times of the electromagnetic screen control module for gain amplification of the writing signals received from the electromagnetic screen are adjusted through the detected temperature, and further, even if the characteristic of the capacitive screen manufactured by the nano silver wire process is changed due to the temperature change, the electromagnetic wave signals penetrating through the capacitive screen and reaching the electromagnetic screen are weakened by the capacitive screen, the amplification times of the received electromagnetic wave signals weakened by the capacitive screen are increased by the electromagnetic screen control module of the electromagnetic screen, and the phenomenon that partial areas of the electromagnetic screen are written and broken due to the temperature change can be avoided.
Drawings
FIG. 1 is a schematic diagram of a touch display system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an embodiment of an electromagnetic screen control module of a touch display system provided by the present invention;
fig. 3 is a schematic structural diagram of another embodiment of a touch display system provided by the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a schematic structural diagram of an embodiment of a touch display system provided in the present invention is shown;
an embodiment of the present invention provides a touch display system, including: the system comprises an electromagnetic screen 101, a capacitive screen 102, a display screen 103, a host control module 104, a temperature detection module 105 and an electromagnetic screen control module 106; the electromagnetic screen 101 is arranged below the capacitive screen 102, and the display screen 103 is arranged below the electromagnetic screen 101;
the temperature detection module 105 is configured to detect a temperature at which the touch display system operates in a current operating environment, and output temperature data corresponding to the temperature to the electromagnetic screen control module 106; preferably, the temperature detection module 105 is a temperature sensor.
The electromagnetic screen control module 106 is configured to adjust a gain multiple of a writing signal received from the electromagnetic screen 101 according to the received temperature data, so as to gain a signal amplitude of the received writing signal to a signal amplitude corresponding to the gain multiple, and output the gained writing signal to the host control module 104;
and the host control module 104 is configured to receive the gained writing signal, and transmit the received writing signal to a display to display a writing trace.
In the embodiment of the present invention, a temperature detection module 105 is added in the electromagnetic screen control module 106, preferably, the temperature detection module 105 is a temperature sensor, detects the working temperature of the whole machine in the current working environment, and provides the detected temperature data to the electromagnetic screen control module 106, the electromagnetic screen control module 106 adjusts the gain multiple of the received writing signal according to the detected current working temperature, so that different gain factors are performed to amplify the writing signal under different temperature conditions, and thus, even if the capacitive screen 102 made by the nano silver wire process changes characteristics due to temperature variation, so that the capacitive screen 102 attenuates electromagnetic wave signals that pass through the capacitive screen 102 to the electromagnetic screen 101, however, the electromagnetic screen control module 106 of the electromagnetic screen 101 can increase the amplification factor of the received electromagnetic wave signal attenuated by the capacitive screen 102, and can also avoid the situation that the electromagnetic screen 101 is partially broken due to the temperature change.
Specifically, as shown in fig. 2, the electromagnetic screen control module 106 includes a signal conversion unit and a micro control unit; the signal conversion unit comprises a function of amplifying signals and is provided with a fixed operational amplifier and an adjustable operational amplifier or only provided with an adjustable operational amplifier. Wherein,
the micro control unit 11 is configured to receive the temperature data output by the temperature detection module 105, determine a gain multiple to be set by the signal conversion unit according to the received temperature data, and output the gain multiple to the signal conversion unit;
the signal conversion unit 12 is configured to receive the gain multiple output by the micro control unit 11, adjust the currently set gain multiple to the received gain multiple, receive a writing signal from the electromagnetic screen 101, gain the signal amplitude of the writing signal to the signal amplitude corresponding to the currently set gain multiple according to the currently set gain multiple, and output the gained writing signal to the micro control unit 11;
and the micro control unit 11 is configured to output the received gained writing signal to the host control unit.
Further, the micro control unit 11 determines a gain multiple set by the signal conversion unit 12 according to the received temperature data, specifically:
judging whether the temperature value corresponding to the current moment is greater than a preset temperature threshold value or not according to the received temperature data; preferably, the preset temperature threshold is zero degrees centigrade.
If yes, determining that the gain multiple to be set by the signal conversion unit 12 is a first gain multiple;
if not, determining that the gain multiple to be set by the signal conversion unit 12 is a second gain multiple; wherein the second gain factor is greater than the first gain factor.
For example, when the temperature sensor detects that the temperature is less than zero, the micro control unit 11 determines, according to the temperature provided by the temperature sensor, that the gain multiple to be set to be high by the signal conversion unit 12 is set to be high, so that the signal conversion unit 12 increases the output amplitude of the signal when converting the writing signal, thereby canceling the attenuation of the capacitive screen 102 to the electromagnetic wave signal emitted by the electromagnetic pen, and realizing the normal writing of the electromagnetic screen 101 at a low temperature without the occurrence of wire breakage.
Further, the touch display system also comprises a capacitive screen 102 control module;
the capacitive screen 102 control module is configured to receive a writing signal from the capacitive screen 102 and transmit the writing signal to the host control unit, so that the host control unit transmits the writing signal to a display to display a writing trace.
It should be noted that the touch display system includes an electromagnetic screen 101, a capacitive screen 102, a display screen 103, a host control module 104, an electromagnetic screen control module 106, and a capacitive screen 102 control module, where the host control module 104 controls the electromagnetic screen control module 106 and the capacitive screen 102 control module to operate respectively, the electromagnetic screen control module 106 controls the electromagnetic screen 101 to operate, and the capacitive screen 102 control module controls the capacitive screen 102 to operate. When a writer uses the electromagnetic pen to write on the screen, an electromagnetic wave signal sent by the electromagnetic pen passes through the capacitive screen 102 and is sent to the electromagnetic screen 101, the electromagnetic screen 101 receives the electromagnetic wave signal, and the electromagnetic control module converts the electromagnetic wave signal received from the electromagnetic screen 101 into a writing signal and transmits the writing signal to the host control module 104. When a writer writes on the screen without using an electromagnetic pen, the capacitive screen 102 generates a capacitive signal, and the capacitive screen 102 control module converts the capacitive signal into a writing signal and transmits the writing signal to the host control module 104. Further, the host control module 104 transmits the writing signal to the display to display the writing trace. Namely, the touch display system provided by the invention can be used for writing under the condition of no electromagnetic pen.
Preferably, the communication connection between the micro control unit 11 and the host control unit is a USB connection, and the micro control unit 11 outputs the received gained writing signal to the host control unit through the USB connection.
Further, the writing signal includes coordinate data of the electromagnetic pen touching the electromagnetic screen 101. The display is displayed according to the coordinate data touched by a writer on the screen.
Fig. 3 is a schematic structural diagram of another embodiment of the touch display system provided in the present invention. The electromagnetic screen control module of the touch display system provided by the embodiment of the invention comprises a signal conversion unit 12, a micro control unit 11 and an operational amplifier unit 13, and the temperature detection module is a temperature sensor.
The workflow of writing using the touch display system provided by the present invention will be described below with reference to fig. 3:
the method comprises the following steps: when the writer powers on the whole machine, the electromagnetic screen control module 106 receives power supply and starts working.
Step two: initializing the micro control unit 11 of the electromagnetic screen control module 106, and operating the temperature sensor;
step three: the micro control unit 11 of the electromagnetic screen control module 106 receives the working temperature of the real-time sensing complete machine working environment of the temperature sensor, when the received working temperature value is greater than zero degree, the micro control unit 11 controls the gain multiple of the signal conversion unit 12 to be set to be A, when the received working temperature value is less than zero degree, the micro control unit 11 controls the gain multiple of the signal conversion unit 12 to be set to be B, and the gain value of B is greater than A.
Step four: the signal conversion unit 12 amplifies the amplitude value of the writing signal received from the electromagnetic screen 101 to the amplitude value corresponding to the gain factor a or B according to the currently set gain factor a or B, and transmits the converted and amplified writing signal to the fixed operation unit for operational amplification. The fixed operational amplifier unit 13 is provided, so that the amplification adjustable gain of the signal conversion unit 12 is more reliable.
Fifthly, the writing signal after the operational amplification of the operational amplification unit 13 is transmitted to the micro control unit 11, the micro control unit 11 packages and converts the received writing signal into a USB signal, and the USB signal is transmitted to the host control unit through USB communication connection;
step six: the host control unit demodulates the received USB signal into a writing signal, wherein the writing signal comprises coordinate data of touch control of a writer on the electromagnetic screen 101 by adopting an electromagnetic pen; the host control unit transmits the writing signal to the display, and the display displays the writing trace on the coordinate corresponding to the coordinate data, thereby completing the writing process.
According to the touch display system provided by the embodiment of the invention, the temperature detection module is added in the electromagnetic screen control module of the original touch display system, the gain times of the electromagnetic screen control module for gain amplification of the writing signals received from the electromagnetic screen are adjusted through the detected temperature, and further, even if the characteristic of the capacitive screen manufactured by the nano silver wire process is changed due to the temperature change, the electromagnetic wave signals penetrating through the capacitive screen and reaching the electromagnetic screen are weakened by the capacitive screen, the amplification times of the received electromagnetic wave signals weakened by the capacitive screen are increased by the electromagnetic screen control module of the electromagnetic screen, and the phenomenon that partial areas of the electromagnetic screen are written and broken due to the temperature change can be avoided.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (7)
1. A touch display system, comprising: the device comprises an electromagnetic screen, a capacitive screen, a display screen, a host control module, a temperature detection module and an electromagnetic screen control module;
the temperature detection module is used for detecting the working temperature of the touch display system in the current working environment and outputting temperature data corresponding to the temperature to the electromagnetic screen control module;
the electromagnetic screen control module comprises a signal conversion unit and a micro control unit; the micro control unit is used for receiving the temperature data output by the temperature detection module, determining a gain multiple to be set by the signal conversion unit according to the received temperature data, and outputting the gain multiple to the signal conversion unit; the signal conversion unit is used for receiving the gain multiple output by the micro control unit, adjusting the currently set gain multiple into the received gain multiple, receiving a writing signal from the electromagnetic screen, gaining the signal amplitude of the writing signal to the signal amplitude corresponding to the currently set gain multiple according to the currently set gain multiple, and outputting the gained writing signal to the micro control unit; the micro control unit is used for outputting the received gained writing signal to the host control module;
and the host control module is used for receiving the gained writing signal and transmitting the received writing signal to a display to display the writing handwriting.
2. The touch display system of claim 1, wherein the determining the gain multiple set by the signal conversion unit based on the received temperature data comprises:
judging whether the temperature value corresponding to the current moment is greater than a preset temperature threshold value or not according to the received temperature data;
if yes, determining that the gain multiple to be set by the signal conversion unit is a first gain multiple;
if not, determining that the gain multiple to be set by the signal conversion unit is a second gain multiple; wherein the second gain factor is greater than the first gain factor.
3. The touch display system of claim 1, further comprising a capacitive screen control module;
the capacitive screen control module is used for receiving writing signals from the capacitive screen and transmitting the writing signals to the host control unit, so that the host control unit transmits the writing signals to the display to display writing.
4. The touch display system of claim 1, wherein the communication connection between the micro control unit and the host control unit is a USB connection, and the micro control unit outputs the received gained writing signal to the host control unit through the USB connection.
5. The touch display system of claim 1, wherein the writing signal comprises coordinate data of an electromagnetic pen touching the electromagnetic screen.
6. The touch display system of claim 1, wherein the temperature detection module is a temperature sensor.
7. The touch display system of claim 2, wherein the preset temperature threshold is zero degrees celsius.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711220369.3A CN107831944B (en) | 2017-11-28 | 2017-11-28 | Touch display system |
| PCT/CN2018/113627 WO2019105178A1 (en) | 2017-11-28 | 2018-11-02 | Touch display system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711220369.3A CN107831944B (en) | 2017-11-28 | 2017-11-28 | Touch display system |
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| Publication Number | Publication Date |
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| CN107831944A CN107831944A (en) | 2018-03-23 |
| CN107831944B true CN107831944B (en) | 2020-06-26 |
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| CN201711220369.3A Active CN107831944B (en) | 2017-11-28 | 2017-11-28 | Touch display system |
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| WO (1) | WO2019105178A1 (en) |
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| CN107831944B (en) * | 2017-11-28 | 2020-06-26 | 广州视源电子科技股份有限公司 | Touch display system |
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| CN103975292A (en) * | 2011-09-28 | 2014-08-06 | 亚马逊技术股份有限公司 | Magnetic stylus |
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| CN103885654A (en) * | 2013-03-12 | 2014-06-25 | 深圳市信濠精密技术股份有限公司 | Electromagnetism and capacitance integrated touch screen and manufacturing method thereof |
| TWI488099B (en) * | 2013-06-20 | 2015-06-11 | Ind Tech Res Inst | Touch device and sensing compensation method |
| KR102274944B1 (en) * | 2014-09-24 | 2021-07-08 | 삼성전자주식회사 | Apparatus and method for identifying an object |
| CN104881191A (en) * | 2015-05-20 | 2015-09-02 | 青岛元盛光电科技有限公司 | Large-size capacitance and electromagnetism integrated touch device |
| US9639225B2 (en) * | 2015-09-18 | 2017-05-02 | Motorola Solutions, Inc. | Method and apparatus for detecting a touch on a device |
| CN107831944B (en) * | 2017-11-28 | 2020-06-26 | 广州视源电子科技股份有限公司 | Touch display system |
-
2017
- 2017-11-28 CN CN201711220369.3A patent/CN107831944B/en active Active
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- 2018-11-02 WO PCT/CN2018/113627 patent/WO2019105178A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103975292A (en) * | 2011-09-28 | 2014-08-06 | 亚马逊技术股份有限公司 | Magnetic stylus |
| CN204515747U (en) * | 2015-03-02 | 2015-07-29 | 深圳市优笔触控科技有限公司 | Electric capacity electromagnetism dual control electronic signature equipment |
| CN106371635A (en) * | 2016-08-31 | 2017-02-01 | 上海芯什达电子技术有限公司 | Electronic pen and electronic writing system with signal automatic gains |
| CN106445067A (en) * | 2016-08-31 | 2017-02-22 | 上海芯什达电子技术有限公司 | Method for lowering power consumption of electronic pen, low-power-consumption electronic pen and electronic writing system |
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| Publication number | Publication date |
|---|---|
| WO2019105178A1 (en) | 2019-06-06 |
| CN107831944A (en) | 2018-03-23 |
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