WO2015161524A1 - 一种稀灯红外多点触摸屏及其实现方法 - Google Patents
一种稀灯红外多点触摸屏及其实现方法 Download PDFInfo
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- WO2015161524A1 WO2015161524A1 PCT/CN2014/076559 CN2014076559W WO2015161524A1 WO 2015161524 A1 WO2015161524 A1 WO 2015161524A1 CN 2014076559 W CN2014076559 W CN 2014076559W WO 2015161524 A1 WO2015161524 A1 WO 2015161524A1
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- axis
- infrared
- touch
- unit
- tube
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Classifications
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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
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
Definitions
- the present invention relates to an optical touch screen, and more particularly to a rare lamp infrared multi-touch screen and an implementation method thereof.
- Infrared touch screen is using X, Y
- An infrared matrix densely on the shaft detects and locates the user's touch device.
- a conventional infrared touch screen is provided with a circuit board outer frame on the front side of the display, and an infrared transmitting tube and an infrared receiving tube are arranged on four sides of the outer frame of the circuit board to form an infrared matrix corresponding to the horizontal and vertical intersections in front of the display screen.
- the conventional infrared touch screen In order to improve the touch precision of the infrared touch screen, the conventional infrared touch screen must have a spacing between the surrounding infrared transmitting tube and the infrared receiving tube smaller than the outer diameter of the touch object.
- the conventional practice is to set the outer diameter of the touch object to be greater than 8mm.
- the distance between the infrared transmitting tube and the infrared receiving tube is set to 5 to 6 mm.
- the figure will appear as shown in the figure. 2
- Two cases are shown: one is that when the touch object is located between two adjacent infrared rays, the touch object is not detected; the second is that the touch object can only block one infrared light, and there is no way to obtain the touch by using the centroid formula. The more precise position of the object results in a smoothing of the scribing and a serious jagged phenomenon.
- the main object of the present invention is to overcome the defects of the large number and high cost of the infrared transmitting tube and the infrared receiving tube existing in the infrared touch screen, and to provide a rare lamp infrared multi-touch screen.
- a rare lamp infrared multi-touch screen mainly composed of a power source, a touch screen, and a microprocessor connected to the touch screen MCU, USB interface, LDO connected to the microprocessor MCU a circuit module, an infrared emitting unit, an infrared receiving unit and an amplifying unit; the infrared transmitting unit and the infrared receiving unit have a one-to-one correspondence, and the infrared transmitting unit is configured by the transmitting and selecting unit and the connected transmitting device
- the tube array unit is composed, and the receiving and selecting unit is composed of a receiving and selecting unit and a receiving tube array unit connected thereto, and the amplifying unit is also connected to the receiving and selecting unit.
- the transmitting tube array unit is composed of two or more infrared transmitting tubes
- the receiving tube array unit is composed of two or more infrared receiving tubes; the number and position of the infrared transmitting tubes and the number of infrared receiving tubes One-to-one correspondence with the position, and the spacing between the adjacent two infrared transmitting tubes and the infrared receiving tube is greater than the specified minimum outer diameter of the touch object.
- a method for implementing a rare lamp infrared multi-touch screen mainly comprises the following steps:
- the right-axis optical scanning network excludes the false touch points of the touch object, and obtains the initial position of the touch object;
- step (3) determining a specific quadrant area where the initial position is located, if it is located in the first quadrant area, performing step (4) If the second quadrant area is located, step (5) is performed; if it is located in the third quadrant area, step (6) is performed; if it is located in the fourth quadrant area, step (7) is performed;
- the 'X-axis left-ray scanning network and X are formed on the touch screen as described in step (1).
- Axis right optical scanning network' wherein the X-axis left optical scanning network refers to an infrared transmitting tube Tn on the X-axis corresponding to the corresponding infrared receiving tube on the X-axis Rn emitting infrared rays, and the infrared transmitting tube on the X-axis Tn also shifts to the left to emit infrared rays to the infrared receiving tube R (n-1) on the X-axis; the X-axis right-light scanning net refers to the infrared transmitting tube Tn on the X-axis corresponding to the corresponding X
- the infrared receiving tube Rn on the shaft emits infrared rays
- the infrared transmitting tube Tn on the X-axis is also shifted to the right to emit infrared
- the 'Y-axis left-light scanning net and the Y-axis right-light scanning net' are formed on the touch screen as described in the step (2), and the Y
- the left-axis optical scanning network refers to the infrared transmitting tube Tn on the Y-axis corresponding to the infrared receiving tube Rn on the corresponding Y-axis.
- the infrared transmitting tube Tn on the Y-axis is also shifted to the left to Y.
- the infrared receiving tube R ( n-1 ) on the shaft emits infrared rays;
- the Y-axis right optical scanning net refers to the infrared transmitting tube Tn on the Y-axis corresponding to the corresponding infrared receiving tube on the Y-axis Rn While emitting infrared rays, the infrared emission tube Tn on the Y-axis is also shifted to the right to emit infrared rays to the infrared receiving tube R (n+1) on the Y-axis; wherein the values of n are 1, 2, 3, 4 ......
- the present invention has the following advantages and beneficial effects:
- the invention can add a diagonal ray between two adjacent rays, thereby effectively avoiding the situation that the touch object cannot be detected when the touch object is located between two adjacent infrared rays.
- the invention is creatively implemented in the touch screen to perform quadrant differentiation, and performs different secondary infrared light scanning in each specific quadrant region, so that the position of the touch object can be accurately positioned, and the sawtooth phenomenon can be effectively overcome.
- the invention can simultaneously confirm the precise position of two or more touch points, thereby completely overcoming the defect that the traditional touch screen cannot achieve multi-touch position localization.
- Figure 1 is a schematic diagram of a conventional infrared touch frame touching a object blocking two or more infrared rays.
- Figure 2 is a schematic diagram of the touch object blocking only one piece and not blocking the infrared light emitted by the conventional infrared touch frame.
- FIG. 3 is a schematic structural view of the overall circuit of the present invention.
- FIG. 4 is a schematic structural diagram of the overall process of the present invention.
- FIG. 5 is a schematic diagram of scanning of the X-axis left optical scanning network of the present invention.
- Figure 6 is a schematic view showing the scanning of the X-axis right optical scanning network of the present invention.
- Figure 7 is a schematic view showing the scanning of the Y-axis left optical scanning network of the present invention.
- Figure 8 is a schematic view showing the scanning of the Y-axis right optical scanning network of the present invention.
- FIG. 9 is a schematic diagram of scanning when the invention has two touch points at the same time.
- FIG. 10 is a schematic diagram of scanning of the touch point in the first quadrant region and the third quadrant region according to the present invention.
- FIG. 3 The overall circuit block diagram of the present invention is shown in FIG. 3, which includes a touch screen 1 , an infrared transmitting unit 2 , and an infrared receiving unit 3 . , Amplifier Unit 4, Power Supply 5, Microprocessor MCU 6, LDO Circuit Module 7 and USB Interface.
- the touch screen 1 is connected to the microprocessor MCU 6, USB The interface, the LDO circuit module 7, the infrared transmitting unit 2, the infrared receiving unit 3, and the amplifying unit 4 are all connected to the microprocessor MCU 6, and the power supply 5 is connected to the USB The interface, the touch screen 1, the infrared transmitting unit 2 and the infrared receiving unit 3 are connected, and provide working energy for the above devices.
- the infrared transmitting unit 2 and the infrared receiving unit 3 have a one-to-one correspondence, and the infrared transmitting unit 2 and the infrared receiving unit 3 The number of each is two, and one infrared transmitting unit 2 matches one infrared receiving unit 3 and is a group.
- the infrared transmitting unit 2 is configured by the transmitting and addressing unit 21 and the transmitting and selecting unit 21
- the connected transmitting tube array unit 22 is composed, and the infrared receiving unit 3 is received by the receiving unit 31 and the receiving tube array unit 32 connected to the receiving and selecting unit 31. Composition.
- the transmitting tube array unit 22 is composed of two or more infrared transmitting tubes, and the receiving tube array unit 32 It consists of more than two infrared receiving tubes. At the same time, an infrared transmitting tube corresponds to an infrared receiving tube.
- the whole system takes power from the USB interface of the PC.
- the USB interface supply voltage is 5V, and the maximum supply current is 500mA.
- Infrared transmitting unit 2, infrared receiving unit 3 is directly using 5V power supply; microprocessor MCU 6 uses 3.3V power supply, therefore, using LDO circuit module 7 will The 5V voltage of the USB interface is converted to 3.3V to accommodate the needs of the microprocessor MCU 6.
- the MCU processor 6 controls the timing of the infrared transmitting tube by controlling the transmitting and locating unit 21; The timing of the infrared receiving tube is controlled by controlling the receiving and locating unit 31.
- MCU processor 6 selects 32 of model STM32F103C8 A high-performance processor that runs all control logic and data processing algorithms. Microprocessor MCU 6 samples all the lamps, processes the arithmetic algorithm centrally, calculates the touch coordinates, and sends them to the PC via USB. Machine.
- each group of receiving tube array units 32 All of the infrared receiving tubes in the array are also arranged in a row.
- the transmitting tube array unit 22 and the receiving tube array unit 32 are respectively distributed in a rectangular shape on the touch screen 1, thereby forming an X-axis and a Y on the touch screen 1.
- the two sets of infrared emitting tubes and infrared receiving tubes of the shaft, and the distance between each group of infrared transmitting tubes and infrared receiving tubes are larger than the outer diameter of the specified minimum touch object. According to the basic rules of the industry, the outer diameter of the touch object is generally positioned 8mm.
- the spacing between each group of infrared transmitting tubes and infrared receiving tubes described in the present application is preferably 9 mm.
- the transmitting tube array unit 22 and the receiving tube array unit 32 can adopt a matrix layout, and can be adopted according to the size of the touch screen. 8X8 array or 8X12 array.
- the advantage of this layout is that there are fewer control lines. For example, an 8X8 array can control 64 transmitter tubes or receiver tubes with only 16 pins.
- the amplifying unit 4 generally adopts a primary to secondary operational amplifier, and can use a single power operational amplifier chip or a dual power operational amplifier chip.
- the left-axis optical scanning network refers to the infrared transmitting tube Tn on the X-axis corresponding to the corresponding infrared receiving tube on the X-axis.
- Rn emits infrared rays
- the infrared transmitting tube Tn on the X-axis is also shifted to the left to X.
- the infrared receiving tube R ( n-1 ) on the shaft emits infrared rays, wherein the values of n are 1, 2, 3, 4, ..., and the specific structure thereof is shown in FIG. 5;
- the X-axis right optical scanning network refers to the infrared transmitting tube Tn on the X-axis corresponding to the corresponding infrared receiving tube on the X-axis. While emitting infrared rays, the infrared emission tube Tn on the X-axis is also shifted to the right to emit infrared rays to the infrared receiving tube R (n+1) on the X-axis, wherein n has values of 1, 2, 3, 4 ..., its specific structure is shown in Figure 6.
- the right-axis optical scanning network excludes the false touch points of the touch object and obtains the initial position of the touch object.
- the Y-axis left-light scanning network refers to the infrared transmitting tube Tn on the Y-axis corresponding to the infrared receiving tube Rn on the corresponding Y-axis. While emitting infrared rays, the infrared emission tube Tn on the Y-axis is also shifted to the left to emit infrared rays to the infrared receiving tube R (n-1) on the Y-axis, wherein the values of n are 1, 2, 3, 4 ..., its specific structure is shown in Figure 7.
- the Y-axis right-light scanning network refers to the infrared transmitting tube Tn on the Y-axis corresponding to the infrared receiving tube Rn on the corresponding Y-axis. While emitting infrared rays, the infrared emission tube Tn on the Y-axis is also shifted to the right to emit infrared rays to the infrared receiving tube R (n+1) on the Y-axis, wherein the values of n are 1, 2, 3, 4 ..., its specific structure is shown in Figure 8.
- step (3) determining a specific quadrant area where the initial position is located, if it is located in the first quadrant area, performing step (4) If it is in the second quadrant area, step (5) is performed; if it is in the third quadrant area, step (6) is performed; if it is in the fourth quadrant area, step (7) is performed.
- the so-called quadrant area refers to the X-axis central axis and Y in the touch area.
- the four regions divided by the central axis of the shaft are, in the counterclockwise direction, the first quadrant region, the second quadrant region, the third quadrant region, and the fourth quadrant region.
- X ( X1*Q1+X2*Q2+ ...... +Xn*Qn ) / ( Q1+Q2+...+Qn ).
- X1, X2, ..., Xn are in 1 N or N 1
- the position numbers corresponding to the N infrared receiving tubes or N transmitting tubes, and Q1, Q2, ..., Qn are the infrared light intensity corresponding to the infrared receiving tube.
- the above N sends 1 receives through the microprocessor MCU 6 To control the transmitting and locating unit and the receiving and locating unit to form a plurality of infrared transmitting tubes to sequentially transmit and fix a signal receiving mode received by one infrared receiving tube; and 1 to send N through the microprocessor MCU 6 To control the transmitting and locating unit and the receiving and locating unit to form a signal acquisition mode in which one infrared transmitting tube is transmitted and a plurality of infrared receiving tubes are sequentially received.
- the touch screen When running, first scan the net and Y by the X-axis left light
- the left-axis optical scanning network scans, and the touch screen may have four touch points A, B, C, and D, where A and B are real points, and C and D are two pseudo-touch points.
- the pseudo-touch points C and D can be excluded to obtain the real touch point A.
- B and the corresponding coordinates the structure is shown in Figure 10. At this point, we can determine the coordinate values of the two points A and B and the quadrant area where the point is located, that is, point A is in the first quadrant area, B The point is in the third quadrant area.
- the present invention can be preferably carried out.
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- Theoretical Computer Science (AREA)
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- General Physics & Mathematics (AREA)
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- Length Measuring Devices By Optical Means (AREA)
Abstract
Description
Claims (5)
- 一种稀灯红外多点触摸屏,其特征在于,主要由电源( 5 )、触摸屏( 1 ),与该触摸屏( 1 )相连接的微处理器 MCU ( 6 ),与该微处理器 MCU ( 6 )相连接的 USB 接口、 LDO 电路模块( 7 )、红外发射单元( 2 )、红外接收单元( 3 )及放大单元( 4 )组成;所述红外发射单元( 2 )与红外接收单元( 3 )的数量和位置均一一对应,且该红外发射单元( 2 )由发射选址单元( 21 )以及与之相连接的发射管阵列单元( 22 )组成,而接收选址单元( 3 )则由接收选址单元( 31 )以及与之相连接的接收管阵列单元( 32 )组成;所述放大单元( 4 )还与接收选址单元( 3 )相连接。
- 根据权利要求 1 所述的一种稀灯红外多点触摸屏,其特征在于,所述发射管阵列单元( 22 )由两条以上的红外发射管组成,所述接收管阵列单元( 32 )由两条以上的红外接收管组成;所述红外发射管的数量与位置与红外接收管的数量和位置一一对应,且相邻两个红外发射管和红外接收管之间的间距均大于规定的最小触摸物体外径。
- 一种稀灯红外多点触摸屏的实现方法,其特征在于,主要包括以下步骤:( 1 )在触摸屏上形成 X 轴左光扫描网和 X 轴右光扫描网 ,获取触摸物体的初略触摸点;( 2 )在触摸屏上形成 Y 轴左光扫描网和 Y 轴右光扫描网,排除触摸物体的虚假触摸点,获得触摸物体的初略位置;( 3 )判定该初略位置所位于的具体象限区域,若位于第一象限区域,则执行步骤( 4 );若位于第二象限区域,则执行步骤( 5 );若位于第三象限区域,则执行步骤( 6 );若位于第四象限区域,则执行步骤( 7 );( 4 )增加 N 发 1 收的 X 轴扇形扫描和 1 发 N 收的 Y 轴扇形扫描,并计算出触摸物体的具体触摸位置,其中, N 的取值为 2 、 3 、 4 ……;( 5 )增加 N 发 1 收的 X 轴扇形扫描和 N 发 1 收的 Y 轴扇形扫描,并计算出触摸物体的具体触摸位置,其中, N 的取值为 2 、 3 、 4 ……;( 6 )增加 1 发 N 收的 X 轴扇形扫描和 N 发 1 收的 Y 轴扇形扫描,并计算出触摸物体的具体触摸位置,其中, N 的取值为 2 、 3 、 4 ……;( 7 )增加 1 发 N 收的 X 轴扇形扫描和 1 发 N 收的 Y 轴扇形扫描,并计算出触摸物体的具体触摸位置,其中, N 的取值为 2 、 3 、 4 ……。
- 根据权利要求 3 所述的一种稀灯红外多点触摸屏的实现方法,其特征在于,步骤( 1 )中所述的'在触摸屏上形成 X 轴左光扫描网和 X 轴右光扫描网',其中,该 X 轴左光扫描网是指 X 轴上的红外发射管 Tn 对应相应的 X 轴上的红外接收管 Rn 发射红外线的同时, X 轴上的红外发射管 Tn 还向左偏移向 X 轴上的红外接收管 R ( n-1 )发射红外线;该 X 轴右光扫描网是指在 X 轴上的红外发射管 Tn 对应相应的 X 轴上的红外接收管 Rn 发射红外线的同时, X 轴上的红外发射管 Tn 还向右偏移向 X 轴上的红外接收管 R ( n+1 )发射红外线;步骤( 2 )中所述的'在触摸屏上形成 Y 轴左光扫描网和 Y 轴右光扫描网',该 Y 轴左光扫描网指在 Y 轴上的红外发射管 Tn 对应相应的 Y 轴上的红外接收管 Rn 发射红外线的同时, Y 轴上的红外发射管 Tn 还向左偏移向 Y 轴上的红外接收管 R ( n-1 )发射红外线;该 Y 轴右光扫描网是指在 Y 轴上的红外发射管 Tn 对应相应的 Y 轴上的红外接收管 Rn 发射红外线的同时, Y 轴上的红外发射管 Tn 还向右偏移向 Y 轴上的红外接收管 R ( n+1 )发射红外线;其中, n 的取值为 1 、 2 、 3 、 4 ……。
- 根据权利要求 3 或 4 所述的一种稀灯红外多点触摸屏的实现方法,其特征在于,步骤( 4 )、( 5 )、( 6 )及( 7 )中所述的'计算出触摸物体的具体触摸位置',其具体计算公式为: X= ( X1*Q1+X2*Q2+ …… +Xn*Qn ) / ( Q1+Q2+......+Qn );其中, X1 、 X2 、 ...... 、 Xn 为在 1 发 N 收或 N 发 1 收扫描时, N 个红外接收管或 N 个发射 管所对应的位置序号,而 Q1 , Q2 、 ...... 、 Qn 则为红外接收管所对应的红外光强度。
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Cited By (3)
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CN106502477A (zh) * | 2016-11-30 | 2017-03-15 | 上海创功通讯技术有限公司 | 一种具有压力感应层的终端的触控方法及装置 |
CN110502158A (zh) * | 2019-08-15 | 2019-11-26 | 无锡海森诺科技有限公司 | 一种基于反射实现红外触摸的***及其检测方法 |
CN112261480A (zh) * | 2020-09-28 | 2021-01-22 | 南京熊猫电子股份有限公司 | 一种结合红外触摸技术的电视机单键操控实现方法 |
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CN101387931B (zh) * | 2008-10-14 | 2010-10-13 | 贺伟 | 一种红外线触摸屏多点识别方法 |
CN101477428B (zh) * | 2008-12-02 | 2011-12-07 | 广东威创视讯科技股份有限公司 | 一种红外触摸定位装置 |
CN102364415B (zh) * | 2011-06-28 | 2013-08-21 | 广东威创视讯科技股份有限公司 | 红外触摸屏多触摸点识别方法及装置 |
CN102339173B (zh) * | 2011-10-10 | 2013-10-30 | 北京鸿合盛视数字媒体技术有限公司 | 一种红外电子白板和控制方法 |
KR101372423B1 (ko) * | 2012-03-26 | 2014-03-10 | 주식회사 알엔디플러스 | 멀티 터치스크린 장치 |
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- 2014-04-25 CN CN201420209686.0U patent/CN203849710U/zh not_active Expired - Lifetime
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- 2014-04-30 WO PCT/CN2014/076559 patent/WO2015161524A1/zh active Application Filing
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CN2824143Y (zh) * | 2005-09-23 | 2006-10-04 | 成都吉锐触摸电脑有限公司 | 带有光学透镜的红外触摸屏 |
CN102129328A (zh) * | 2010-01-16 | 2011-07-20 | 鸿富锦精密工业(深圳)有限公司 | 红外线触摸屏 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN106502477A (zh) * | 2016-11-30 | 2017-03-15 | 上海创功通讯技术有限公司 | 一种具有压力感应层的终端的触控方法及装置 |
CN106502477B (zh) * | 2016-11-30 | 2024-04-12 | 上海创功通讯技术有限公司 | 一种具有压力感应层的终端的触控方法及装置 |
CN110502158A (zh) * | 2019-08-15 | 2019-11-26 | 无锡海森诺科技有限公司 | 一种基于反射实现红外触摸的***及其检测方法 |
CN112261480A (zh) * | 2020-09-28 | 2021-01-22 | 南京熊猫电子股份有限公司 | 一种结合红外触摸技术的电视机单键操控实现方法 |
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Publication number | Publication date |
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CN203849710U (zh) | 2014-09-24 |
CN105393197A (zh) | 2016-03-09 |
CN105393197B (zh) | 2018-08-24 |
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