WO2008014652A1 - Dispositif tactile infrarouge de type anti-brouillage et procédé de positionnement associé - Google Patents

Dispositif tactile infrarouge de type anti-brouillage et procédé de positionnement associé Download PDF

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Publication number
WO2008014652A1
WO2008014652A1 PCT/CN2007/001181 CN2007001181W WO2008014652A1 WO 2008014652 A1 WO2008014652 A1 WO 2008014652A1 CN 2007001181 W CN2007001181 W CN 2007001181W WO 2008014652 A1 WO2008014652 A1 WO 2008014652A1
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WO
WIPO (PCT)
Prior art keywords
transmitting
infrared
receiving
module
modules
Prior art date
Application number
PCT/CN2007/001181
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English (en)
Chinese (zh)
Inventor
Chunjing Zhou
Ruxi Lu
Original Assignee
Vtron Technologies Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vtron Technologies Ltd. filed Critical Vtron Technologies Ltd.
Publication of WO2008014652A1 publication Critical patent/WO2008014652A1/fr

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Classifications

    • 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
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen

Definitions

  • infrared positioning technology can easily produce large-size touch screens, which can be used in rear projection TVs, front projectors, or PDP/LCD display devices. Due to the complete light transmission of infrared positioning, several other positioning techniques cannot be compared. Although infrared positioning technology has many advantages, because the size of the infrared tube limits the improvement of resolution, the infrared emitting tube has a fixed emission angle, and the infrared tubes interfere with each other; the reflection of light causes the writing object to block the infrared light path; The large-size infrared technology touch screen refresh rate is slow; using traditional processing technology, infrared positioning technology can only be used for small-sized touch screens and low positioning accuracy requirements, far from the requirements of handwriting writing.
  • FIG. 1 is a schematic diagram showing the structure and optical path of an infrared positioning touch device according to the present invention. As shown in the figure, there are three sets of transmitting and receiving modules in the X direction, and three sets of transmitting and receiving modules in the Y direction.
  • FIG. 3 is a schematic diagram of an infrared tube scanning operation of a general infrared positioning technology adjacent to or separated from a transmitting or receiving module.
  • An object of the present invention is to provide an anti-interference type infrared touch device and a positioning method which are strong in anti-interference, fast in processing, and suitable for large-screen positioning.
  • the schematic diagram of the main microprocessor is shown in FIG. 6, wherein the port of the main microprocessor having the PWM output function is connected to the port having the interrupt function from the microprocessor, and the microprocessor of each receiving module can pass the I2C interface. Or the SPI interface is connected to the main microprocessor.
  • the transmitting modules are connected by a power line, a ground line, a transmitting infrared tube power line, and a synchronous signal line
  • the receiving modules are connected by a power line, a ground line, a synchronous signal line, an I2C bus clock line, and an I2C bus data line.
  • the main microprocessor can share a microprocessor with one of the slave microprocessors.
  • a light-transmitting sheet that prevents dust and is resistant to external light is mounted on the frame of the four edges of the capture plane of the infrared touch device.
  • the infrared tube of at least one of the emission sides of the anti-interference type infrared touch device and/or at least one end of the at least one receiving side is offset by a certain angle.
  • the infrared ray positioning of the plurality of infrared tubes at the four corners of the touch device is offset by a certain angle, and the optimal solution is to use 3-10 according to different sizes of the touch device.
  • the infrared tubes are offset from the center of the screen by a certain angle.
  • the slave microprocessor of each receiving module transmits the detected touch information or other debugging information to the main microprocessor through a bus interface through a bus interface, and is generally transmitted by using an I2C communication interface.
  • the adjacent transmitting module located at at least one corner of the anti-interference type infrared touch device and the infrared tube corresponding to the receiving module adopt a timing staggered operation mode.
  • the main microprocessor calculates the detected occlusion information to form coordinate information through the USB interface or RS-
  • the 232 serial interface is sent to the computer.
  • Each transmitting module or receiving module is controlled by a slave microprocessor. All slave transceivers that control transmission and reception work under the coordination of a master microprocessor.
  • the slave modules of each receiver module pass the I2C interface or SPI interface.
  • each of the receiving module and the transmitting module is connected to a port of the main microprocessor having an output function, and the synchronous operation of the entire infrared positioning touch device is realized. .
  • the present invention has the following beneficial effects:
  • FIG. 1 is a schematic view showing the structure and optical path of an infrared positioning touch device of the present invention
  • FIG. 2 is a schematic diagram showing the distribution of a microprocessor of the anti-interference type infrared touch device of the present invention
  • 3 is a timing chart of an infrared tube scanning operation of a conventional infrared touch device
  • FIG. 5 is a schematic diagram of the principle of the receiving module of the present invention.
  • FIG. 6 is a schematic diagram of the principle of the main module of the present invention.
  • FIG. 7 is a schematic diagram showing the connection relationship between modules of the present invention.
  • FIG. 8 is a timing chart of scanning operation of a transmitting module or a receiving module of the anti-jamming infrared touch device of the present invention.
  • FIG. 10 is a timing diagram showing the working states of the corresponding infrared tubes of the adjacent transmitting module and the receiving module at the lower left corner of the anti-interference type infrared touch device of the present invention
  • 11 is a timing chart showing the operation of detecting the occlusion information detected by the I2C line of the anti-interference type infrared touch device of the present invention.
  • Fig. 12 is a schematic view showing an infrared positioning touch device equipped with a light guiding hole.
  • the anti-jamming infrared touch device of the present invention has a plurality of sets of spliced infrared transmitting modules and receiving modules arranged in the X and Y coordinate directions, and corresponding transmitting module and receiving module requirements in the X-axis direction and the Y-axis direction. Strict alignment. Three pairs are installed in the X-axis direction: X_SND1, X_RCV1 ; X-SND2, X_RCV2; X-SND3, X-RCV3.
  • the number of transmitting modules and receiving modules in the X and Y directions can be changed to form infrared touch devices of different sizes.
  • each of the transmitting module and the receiving module respectively includes From the microprocessor, the anti-interference type infrared touch device further includes a main microprocessor.
  • the main microprocessor shares a microprocessor with one of the slave microprocessors and is integrated in a main module.
  • the main microprocessor + X-RCV1 in Figure 2 the main microprocessor and the slave microprocessor are distributed as shown in Figure 2.
  • Each transmitting module is connected by a power line, a ground line, a transmitting infrared tube power line, and a synchronous signal line.
  • Each receiving module is connected by a power line, a ground line, a synchronous signal line, an I2C bus clock line, and an I2C bus data line.
  • the LED-VCC is used to supply power to the anode of the launch tube, and the independent power supply is used to avoid interference with the +5V power supply;
  • the main module provides the synchronous clock SYNC to the transmitting module, and each receiving and transmitting module cooperates to complete the positioning work. 4. Interface between the main module and the receiving module:
  • the main module provides the receiving module with a synchronous clock SYNC, and each receiving and transmitting module cooperates to complete the positioning work;
  • the main module communicates with the receiving module by the data line and clock line (SDA, SCL) of the I2C bus.
  • the command of the main module is sent to the receiving module through the I2C bus, and the receiving module uploads touch coordinate information or other debugging information through the I2C bus.
  • the main microprocessor has an output function port connected with the infrared transmitting module and the receiving module from the microprocessor having an interrupt function to realize the synchronous timing signal of the entire infrared scanning positioning touch device.
  • the transmitting module and the receiving module in the X direction are taken as an example, and the scanning method is as shown in FIG. 8 , and the first to Nth transmitting and receiving tubes are scanned one by one to realize the transmitting module and the receiving module of each group.
  • the present invention devises a particular timing that effectively avoids interference due to the angle of emission of the infrared transmitting tube.
  • Each of the infrared pair tubes is scanned one by one at the timing shown in FIG. 9.
  • only one pair of infrared tubes are in a working state on a pair of transmitting modules and receiving modules, but the corresponding pairs of tubes on different pairs of transmitting and receiving modules work.
  • the time is designed to be inconsistent. Take the No.
  • only X_RCV2 detects the occlusion information, so only one occlusion information is detected in the X direction, and only one occlusion information is detected at the same time in the Y direction. . In this way, multiple pieces of information are not detected at the same time, that is, accurate occlusion information can be judged.
  • the infrared transmitting tube receiving tube corresponding to the transmitting module and the receiving module adjacent to the lower left corner of the infrared touch device shown in FIG. 1 is designed to operate at different timings, and still takes the No. 2 tube as an example, that is, the transmitting module Y1
  • the transmitting module Y1 When the SND1 and the receiving module Y-RCV1 are operated by the infrared pair tube No. 2, the infrared pair tube of the receiving module X_RCV1 and the transmitting module X_SND1 is in a stopped state.
  • FIG. 10 in this working timing mode, even if the No. 2 transmitting tube of the Y-SND1 illuminates the corresponding No.
  • the transmitting module X_SEND3 and the receiving module Y-RCV3 in the upper right corner of the touch device are also designed to operate at different timings. Therefore, the infrared tube of the receiving module in the lower left corner and the upper right corner at the same time can not receive the infrared light emitted by the adjacent transmitting module infrared tube, so that no interference occurs, and the infrared touch device can accurately detect the specific position information of the covering object.
  • the I2C bus of the present invention completes communication between the main module and each receiving module, and the command of the main module passes the I2C
  • the bus is sent to each receiving module, and the receiving module uploads touch information or other debugging information through the I2C bus.
  • the invention improves the refreshing speed of the large-sized infrared positioning touch screen, and the I2C communication uses a special working time mode to avoid bus conflict, greatly improving the speed of the infrared positioning touch device processing the occlusion information data, and completing the trajectory capturing on the large-sized touch screen. The effect is remarkable. As shown in Figure 11, under normal operation, each receiving module counts the sync pulse.
  • the transmission detection starts at that moment.
  • the occlusion information is sent to the main microprocessor; this avoids the bus conflict caused by the simultaneous transmission of occlusion information after all the infrared tubes are scanned in the general method, and improves the refresh rate.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)

Abstract

L'invention concerne un appareil tactile infrarouge de type anti-brouillage. Cet appareil comprend au moins un groupe de modules d'émission et un groupe de modules de réception qui s'agencent dans la direction longitudinale et transversale. Les modules d'émission sont reliés entre eux par une ligne de signaux synchrones. Les modules de réception sont reliés à un bus par une ligne de signaux synchrones. Les modules de réception et les modules d'émission comprennent chacun un microprocesseur-esclave. L'appareil tactile infrarouge de positionnement de l'invention comprend un microprocesseur principal. Le microprocesseur principal produit un signal synchrone de référence qu'il envoie aux microprocesseurs-esclaves de tous les modules d'émission et aux microprocesseurs-esclaves de tous les modules de réception. Le microprocesseur principal génère un signal synchrone spécifique à partir de la configuration du signal synchrone de référence, en fonction de ce qui est nécessaire pour les séquences temporelles décalées, puis il balaie un à un les tubes de d'émission et les tubes de réception, du premier au nième. Une paire de tubes infrarouges d'émission et de réception appartenant à un groupe de modules d'émission et à un groupe de modules de réception fonctionnent de manière synchrone, mais les tubes infrarouges correspondants d'au moins un autre groupe de modules d'émission et un autre groupe de réception séparés ou adjacents utilisent le mode de fonctionnement asynchrone. L'appareil tactile infrarouge anti-brouillage de l'invention et le procédé de positionnement de l'invention permettent d'obtenir un effet anti-brouillage très efficace et une vitesse de traitement rapide, et permettent d'effectuer le positionnement d'un écran de grande taille.
PCT/CN2007/001181 2006-07-27 2007-04-12 Dispositif tactile infrarouge de type anti-brouillage et procédé de positionnement associé WO2008014652A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN200610036711 2006-07-27
CN200610036711.X 2006-07-27
CN200610126079A CN100589070C (zh) 2006-07-27 2006-08-31 抗干扰型红外触摸装置及定位方法
CN200610126079.8 2006-08-31

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WO (1) WO2008014652A1 (fr)

Cited By (3)

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CN111949166A (zh) * 2020-08-10 2020-11-17 青岛海信商用显示股份有限公司 红外触摸大屏控制方法、红外触摸大屏及控制设备
CN116483224A (zh) * 2022-01-14 2023-07-25 广州众远智慧科技有限公司 红外触摸装置的控制方法以及红外触摸系统
CN117191093A (zh) * 2023-11-08 2023-12-08 钛玛科（北京）工业科技有限公司 一种抗干扰红外传感器及其工作方法

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CN101382859B (zh) * 2008-05-28 2011-08-10 北京汇冠新技术股份有限公司 用于红外触摸屏的光电发射接收装置
CN101598994B (zh) * 2008-12-31 2012-05-09 广东威创视讯科技股份有限公司 抗干扰红外触摸定位方法
CN101598995B (zh) * 2008-12-31 2012-04-18 广东威创视讯科技股份有限公司 一种节能的红外触摸定位方法
CN101566896B (zh) * 2009-05-31 2011-04-20 广东威创视讯科技股份有限公司 一种实现红外扫描与摄像头同步工作的方法及系统
KR101657216B1 (ko) * 2010-03-02 2016-09-19 삼성디스플레이 주식회사 터치 패널 및 터치 패널의 접촉 위치 검출 방법
CN102479004B (zh) * 2010-11-29 2014-11-05 北京汇冠新技术股份有限公司 一种触摸点定位方法、装置及触摸屏
CN103348306B (zh) * 2010-12-31 2017-02-15 多点触控有限公司 交互式显示设备以及交互式显示设备中的方法
CN102419661B (zh) * 2011-03-09 2014-09-03 北京汇冠新技术股份有限公司 一种触摸定位方法、触摸定位装置及红外触摸屏
CN102508580A (zh) * 2011-10-26 2012-06-20 广东威创视讯科技股份有限公司 一种红外定位方法及装置
CN102799316B (zh) * 2012-07-04 2016-01-20 广东威创视讯科技股份有限公司 一种抗干扰红外触摸装置
CN103207149A (zh) * 2013-04-16 2013-07-17 无锡优创生物科技有限公司 红外凝胶定位装置及应用该定位装置的凝胶成像系统
CN105955480A (zh) * 2016-04-29 2016-09-21 广东美的制冷设备有限公司 红外手势识别模块的控制方法、模块和设备
CN106325606B (zh) * 2016-09-14 2019-05-28 青岛海信电器股份有限公司 红外触控设备的信号扫描方法、装置及触控设备
CN106775058A (zh) * 2016-11-23 2017-05-31 广州视源电子科技股份有限公司 一种红外触摸屏的控制方法和控制装置

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
CN111949166A (zh) * 2020-08-10 2020-11-17 青岛海信商用显示股份有限公司 红外触摸大屏控制方法、红外触摸大屏及控制设备
CN111949166B (zh) * 2020-08-10 2024-02-13 青岛海信商用显示股份有限公司 红外触摸大屏控制方法、红外触摸大屏及控制设备
CN116483224A (zh) * 2022-01-14 2023-07-25 广州众远智慧科技有限公司 红外触摸装置的控制方法以及红外触摸系统
CN117191093A (zh) * 2023-11-08 2023-12-08 钛玛科（北京）工业科技有限公司 一种抗干扰红外传感器及其工作方法

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CN1945514A (zh) 2007-04-11

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