WO2011124138A1 - Inductive touch led module - Google Patents

Inductive touch led module Download PDF

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Publication number
WO2011124138A1
WO2011124138A1 PCT/CN2011/072503 CN2011072503W WO2011124138A1 WO 2011124138 A1 WO2011124138 A1 WO 2011124138A1 CN 2011072503 W CN2011072503 W CN 2011072503W WO 2011124138 A1 WO2011124138 A1 WO 2011124138A1
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WO
WIPO (PCT)
Prior art keywords
inductive
inductive touch
liquid crystal
crystal display
control circuit
Prior art date
Application number
PCT/CN2011/072503
Other languages
French (fr)
Chinese (zh)
Inventor
林桓
Original Assignee
Lin Huan
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 Lin Huan filed Critical Lin Huan
Publication of WO2011124138A1 publication Critical patent/WO2011124138A1/en

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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
    • G06F3/046—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by electromagnetic 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
    • G06F3/0412—Digitisers structurally integrated in a display

Definitions

  • the utility model relates to an LED module structure, in particular to an inductive touch LED module in which an inductive receiving board is mounted in an LED display assembly.
  • inductive touch devices mostly use a magnetic touch stylus.
  • the inductance of the corresponding unit of the inductive receiving device changes, thereby determining that the stylus is on the screen surface. s position.
  • the inductive receiving device is generally installed on the side of the display screen, and needs to be accurately positioned during installation, and there is a possibility of displacement during transportation and use, which will affect the consistency and accuracy of the handwritten position displayed on the stylus and the screen. Sex, its scope of application is limited.
  • the utility model provides an inductive touch device with reasonable structure, simple operation and fast and accurate positioning.
  • An inductive touch device consisting of a liquid crystal display and an inductive touch control circuit, wherein the inductive touch control circuit includes an inductive receiving board and a meter
  • the frequency converter, the level comparator, the scanning circuit and the CPU, the liquid crystal display is composed of a TFT glass, a display driving circuit and an LED backlight module, and the inductive touch control circuit is connected to the liquid crystal display through a PC host.
  • a further technical measure of the utility model is that the inductive receiving board is placed under the LED backlight module, and the size of the inductive receiving board and the LED display screen are the same, the inductive receiving board is in communication with the scanning circuit, and the scanning circuit is respectively connected with the level comparator, The discriminator is connected, the level comparator and the discriminator are connected to the CPU, and the CPU is connected to the PC host through the serial bus controller, and the liquid crystal display communicates with the PC host through the display driving circuit.
  • the sensing receiving board is used for receiving the frequency signal of the external stylus
  • the frequency discriminating device is used for detecting the signal frequency of the stylus
  • the scanning circuit is used for determining the writing position of the stylus
  • the CPU output signal is presented to the liquid crystal display through the PC host.
  • the sensing receiving board uses the stylus to generate different frequency signals when the force is different, when the frequency signal sent by the stylus is received by the sensing receiving board, the sensing receiving board generates the oscillating voltage of the corresponding frequency to determine the position of the stylus. According to the signal frequency, the size of the writing power can be judged, and then the change of the handwriting strength can be changed into the change of the stroke thickness, and the personality is full;
  • the integrated receiving structure is installed on the back of the LED display to overcome the problem of positioning and displacement.
  • the LED display is more colorful, environmentally friendly and energy-saving. , long life, thinner products, etc., has become an inevitable trend in the development of display modules;
  • Figure 1 is a schematic exploded view of the utility model
  • FIG. 2 is a circuit block diagram of the utility model.
  • LCD In the figure: 1, LCD, 2, inductive touch control circuit, 3, induction receiver board, 4, frequency discriminator, 5, level comparator, 6, scanning circuit, 7, CPU, 8, serial Bus controller, 9, TFT glass, 10, display driver circuit, 11, PC host, 12, front frame, 13, LED backlight module, 14, back metal plate.
  • the inductive receiving board 3 of the inductive touch control circuit 2 is disposed under the LED backlight module 13 , and the back side metal plate 14 is further disposed under the inductive receiving board 3 .
  • the TFT glass 13 and the front frame 12 are disposed above the backlight module 13, and can be protected and integrated into an integrated inductive touch LED module.
  • the stylus when used, when the external stylus is clicked on the TFT glass 9, the stylus generates a signal of an oscillating frequency, and the sensing receiving board 3 receives the signal of the oscillating frequency, and the scanning circuit 6 pairs the frequency of 6 MHz.
  • Inductive receiver board 3 scanning the period of scanning the inductive receiving board 3 once is 0. 2ms, the level comparator 5 compares the level of the signal scanned in each scanning period with the maximum level signal that has been obtained in the period, The scanning circuit 6 and the level comparator 5 determine the position coordinates of the signal received by the inductive receiving board 3.
  • the scanning address of the maximum level signal is the position coordinate of the stylus, and the frequency discriminator 4 acts to set different frequency signals. Transform into signals of different level changes.
  • the received signal is input to the CPU 7, and the output signal of the scanning circuit 6 is also input to the discriminator 4, and the signal of the different oscillation frequency of the stylus is converted by the discriminator 4 into signals of different levels, and the A/D of the CPU 7 is passed.
  • Conversion that is, the nib of the nib circuit is pressure-converted into a digital signal
  • the CPU 7 converts the input position coordinate signal and the pressure digital signal into a USB serial signal via the serial bus controller 8 and inputs it into the PC host 1 1, the PC host 11
  • it is sent to the display driving circuit 10 through the VGA port, so that the writing handwriting of the stylus is displayed on the TFT glass 9.

Abstract

An inductive touch LED module comprises a liquid crystal display screen (1) and an inductive touch control circuit (2). The inductive touch control circuit comprises an inductive receiving board (3), a frequency discriminator (4), a level comparator (5), a scanning circuit (6) and a CPU (7), which are connected with each other. The liquid crystal display screen is composed of a TFT glass (9), a display screen driving circuit (10) and an LED backlight module (3). The inductive touch control circuit is connected with the liquid crystal display screen by a PC host (11).

Description

电感式触控 LED模组  Inductive touch LED module
技术领域 Technical field
本实用新型涉及一种 LED模组结构， 尤指一种将感应接收板装到 LED显示屏组件中， 使 之成为一体化的电感式触控 LED模组。  The utility model relates to an LED module structure, in particular to an inductive touch LED module in which an inductive receiving board is mounted in an LED display assembly.
背景技术 Background technique
目前的电感式触控装置， 大多采用磁性触控手写笔的方式， 当手写笔在屏幕表面书写时， 感应接收装置的相应单元的电感量就会发生变化， 由此可以确定手写笔在屏幕表面的位置。 感应接收装置一般安装在显示屏的侧面， 在安装时要较为准确的定位， 且存在运输、 使用过 程中发生位移的可能， 这将影响到手写笔与屏幕上显示的手写位置的一致性和准确性， 其应 用范围受到限制。  At present, inductive touch devices mostly use a magnetic touch stylus. When the stylus is written on the screen surface, the inductance of the corresponding unit of the inductive receiving device changes, thereby determining that the stylus is on the screen surface. s position. The inductive receiving device is generally installed on the side of the display screen, and needs to be accurately positioned during installation, and there is a possibility of displacement during transportation and use, which will affect the consistency and accuracy of the handwritten position displayed on the stylus and the screen. Sex, its scope of application is limited.
发明内容 Summary of the invention
为克服背景技术所存在的不足， 本实用新型提出一种结构合理、 操作简易、 定位快速准 确的电感式触控装置。  In order to overcome the deficiencies of the background art, the utility model provides an inductive touch device with reasonable structure, simple operation and fast and accurate positioning.
为达到上述目的， 本实用新型通过以下技术方案予以实现： 一种电感式触控装置， 由液 晶显示屏和电感式触控控制电路所组成， 其中电感式触控控制电路包括感应接收板、鉴频器、 电平比较器、 扫描电路以及 CPU, 液晶显示屏由 TFT玻璃、 显示屏驱动电路、 LED背光模组所 组成， 电感式触控控制电路通过 PC主机与液晶显示屏相连。  In order to achieve the above object, the present invention is implemented by the following technical solutions: An inductive touch device consisting of a liquid crystal display and an inductive touch control circuit, wherein the inductive touch control circuit includes an inductive receiving board and a meter The frequency converter, the level comparator, the scanning circuit and the CPU, the liquid crystal display is composed of a TFT glass, a display driving circuit and an LED backlight module, and the inductive touch control circuit is connected to the liquid crystal display through a PC host.
本实用新型进一步的技术措施是， 感应接收板置于 LED背光模组的下方， 并且感应接收 板和 LED显示屏的大小一致， 感应接收板与扫描电路相通， 扫描电路分别与电平比较器、 鉴 频器相连通， 电平比较器和鉴频器连接至 CPU, CPU通过串行总线控制器接至 PC主机上， 液 晶显示屏通过显示屏驱动电路与 PC主机相通。  A further technical measure of the utility model is that the inductive receiving board is placed under the LED backlight module, and the size of the inductive receiving board and the LED display screen are the same, the inductive receiving board is in communication with the scanning circuit, and the scanning circuit is respectively connected with the level comparator, The discriminator is connected, the level comparator and the discriminator are connected to the CPU, and the CPU is connected to the PC host through the serial bus controller, and the liquid crystal display communicates with the PC host through the display driving circuit.
感应接收板用于接收外界手写笔的频率信号， 鉴频器用于检测手写笔的信号频率， 扫描 电路用于确定手写笔的书写位置， 再由 CPU输出信号经 PC主机至液晶显示屏呈现出来。 与现有技术相比， 本实用新型的技术优势在于： The sensing receiving board is used for receiving the frequency signal of the external stylus, the frequency discriminating device is used for detecting the signal frequency of the stylus, the scanning circuit is used for determining the writing position of the stylus, and then the CPU output signal is presented to the liquid crystal display through the PC host. Compared with the prior art, the technical advantages of the utility model are as follows:
1： 采用手写笔在受力大小不同时产生不同频率信号的方法， 当手写笔发出的频率信号被 感应接收板所接收时， 感应接收板产生相应频率的振荡电压即可确定手写笔的位置， 根据信 号频率即可判断书写力量的大小， 进而实现将手写力度的变化转变为笔划粗细的变化， 个性 十足；  1: Using the stylus to generate different frequency signals when the force is different, when the frequency signal sent by the stylus is received by the sensing receiving board, the sensing receiving board generates the oscillating voltage of the corresponding frequency to determine the position of the stylus. According to the signal frequency, the size of the writing power can be judged, and then the change of the handwriting strength can be changed into the change of the stroke thickness, and the personality is full;
2： 而且采用一体化结构， 感应接收板安装在 LED显示屏的背后， 克服了定位及位移的问 题， 相对与传统的 LCD显示屏而言， LED显示屏的色彩更加丰富， 并具有环保、 节能、 寿命 长、 产品更薄等特点， 已经成为显示模组发展的必然趋势；  2: In addition, the integrated receiving structure is installed on the back of the LED display to overcome the problem of positioning and displacement. Compared with the traditional LCD display, the LED display is more colorful, environmentally friendly and energy-saving. , long life, thinner products, etc., has become an inevitable trend in the development of display modules;
3： 设计新颖、 结构合理， 安装便易、 实用性高， 推广价值高。  3: The design is novel, the structure is reasonable, the installation is easy, the practicability is high, and the promotion value is high.
附图说明 DRAWINGS
下面结合附图和实施例对本实用新型作进一步说明。  The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
图 1是本实用新型的结构分解示意图；  Figure 1 is a schematic exploded view of the utility model;
图 2是本实用新型的电路原理框图。  2 is a circuit block diagram of the utility model.
图中： 1、 液晶显示屏， 2、 电感式触控控制电路， 3、 感应接收板， 4、 鉴频器， 5、 电平 比较器， 6、 扫描电路， 7、 CPU, 8、 串行总线控制器， 9、 TFT玻璃， 10、 显示屏驱动电路， 11、 PC主机， 12、 前框， 13、 LED背光模组， 14、 背面金属板。  In the figure: 1, LCD, 2, inductive touch control circuit, 3, induction receiver board, 4, frequency discriminator, 5, level comparator, 6, scanning circuit, 7, CPU, 8, serial Bus controller, 9, TFT glass, 10, display driver circuit, 11, PC host, 12, front frame, 13, LED backlight module, 14, back metal plate.
具体实施方式 detailed description
参照图 1所示， 本实用新型的结构中， 电感式触控控制电路 2的感应接收板 3置于 LED 背光模组 13的下方， 感应接收板 3的下方还设置有背面金属板 14， LED背光模组 13的上方 设置有 TFT玻璃 13和前框 12， 可起到保护作用， 共同组装成了一体化的电感式触控 LED模 组。  Referring to FIG. 1 , in the structure of the present invention, the inductive receiving board 3 of the inductive touch control circuit 2 is disposed under the LED backlight module 13 , and the back side metal plate 14 is further disposed under the inductive receiving board 3 . The TFT glass 13 and the front frame 12 are disposed above the backlight module 13, and can be protected and integrated into an integrated inductive touch LED module.
参照图 2所示， 使用时， 当外界的手写笔在 TFT玻璃 9上点击时， 手写笔会产生一振荡 频率的信号， 感应接收板 3接收该振荡频率的信号， 扫描电路 6按 6MHz的频率对感应接收板 3进行扫描， 对感应接收板 3扫描一次的周期为 0. 2ms， 电平比较器 5对每一扫描周期内扫描 到的信号与该周期内已经得到的最大电平信号进行电平比较， 通过扫描电路 6及电平比较器 5确定感应接收板 3接收到信号的位置座标， 其最大电平信号的扫描地址即为手写笔的位置 座标， 鉴频器 4作用是将不同的频率信号变换为不同的电平变化的信号。 Referring to FIG. 2, when used, when the external stylus is clicked on the TFT glass 9, the stylus generates a signal of an oscillating frequency, and the sensing receiving board 3 receives the signal of the oscillating frequency, and the scanning circuit 6 pairs the frequency of 6 MHz. Inductive receiver board 3 scanning, the period of scanning the inductive receiving board 3 once is 0. 2ms, the level comparator 5 compares the level of the signal scanned in each scanning period with the maximum level signal that has been obtained in the period, The scanning circuit 6 and the level comparator 5 determine the position coordinates of the signal received by the inductive receiving board 3. The scanning address of the maximum level signal is the position coordinate of the stylus, and the frequency discriminator 4 acts to set different frequency signals. Transform into signals of different level changes.
将接收到的信号输入 CPU7 , 同时扫描电路 6的输出信号也输入鉴频器 4， 由鉴频器 4将 手写笔不同的振荡频率的信号转换为不同电平的信号， 经 CPU7的 A/D转换， 即将笔尖回路的 笔尖受到压力变换成为数字信号， CPU7将输入的位置座标信号和压力的数字信号经串行总线 控制器 8转换为 USB串行信号后输入 PC主机 1 1， PC主机 11处理后通过 VGA端口输送至显示 屏驱动电路 10， 使手写笔的书写笔迹显示在 TFT玻璃 9上。  The received signal is input to the CPU 7, and the output signal of the scanning circuit 6 is also input to the discriminator 4, and the signal of the different oscillation frequency of the stylus is converted by the discriminator 4 into signals of different levels, and the A/D of the CPU 7 is passed. Conversion, that is, the nib of the nib circuit is pressure-converted into a digital signal, and the CPU 7 converts the input position coordinate signal and the pressure digital signal into a USB serial signal via the serial bus controller 8 and inputs it into the PC host 1 1, the PC host 11 After processing, it is sent to the display driving circuit 10 through the VGA port, so that the writing handwriting of the stylus is displayed on the TFT glass 9.

Claims

1、一种电感式触控 LED模组， 由液晶显示屏和电感式触控控制电路所组成，其特征在于： 所述的电感式触控控制电路包括感应接收板、 鉴频器、 电平比较器、 扫描电路以及 CPU, 液 晶显示屏由 TFT玻璃、 显示屏驱动电路、 LED背光模组所组成， 感应接收板置于 LED背光模 组的下方， 电感式触控控制电路通过 PC主机与液晶显示屏相连。 1. An inductive touch LED module, comprising a liquid crystal display and an inductive touch control circuit, wherein: the inductive touch control circuit comprises an inductive receiving board, a discriminator, and a level Comparator, scanning circuit and CPU, the liquid crystal display is composed of TFT glass, display driving circuit and LED backlight module. The inductive receiving board is placed under the LED backlight module, and the inductive touch control circuit passes through the PC host and the liquid crystal. The display is connected.
2、根据权利要求 1所述的电感式触控 LED模组， 其特征在于： 所述的感应接收板与扫描 电路相通， 扫描电路分别与电平比较器、 鉴频器相连通， 电平比较器和鉴频器连接至 CPU, CPU通过串行总线控制器接至 PC主机上。  The inductive touch LED module according to claim 1, wherein: the inductive receiving board is in communication with the scanning circuit, and the scanning circuit is respectively connected to the level comparator and the discriminator, and the levels are compared. The controller and the discriminator are connected to the CPU, and the CPU is connected to the PC host through the serial bus controller.
3、根据权利要求 1所述的电感式触控 LED模组， 其特征在于： 所述的液晶显示屏通过显 示屏驱动电路与 PC主机相通。  3. The inductive touch LED module of claim 1, wherein: the liquid crystal display is in communication with a PC host through a display screen driving circuit.
PCT/CN2011/072503 2010-04-08 2011-04-07 Inductive touch led module WO2011124138A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN 201020158272 CN201662667U (en) 2010-04-08 2010-04-08 Inductive touch control LED module
CN201020158272.1 2010-04-08

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WO2011124138A1 true WO2011124138A1 (en) 2011-10-13

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8982090B2 (en) 2012-01-01 2015-03-17 Cypress Semiconductor Corporation Optical stylus synchronization

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4947156A (en) * 1984-11-16 1990-08-07 Sharp Kabushiki Kaisha Handwritten character input device
CN2080917U (en) * 1990-12-06 1991-07-17 汤小戈 Adjustable headlight of vehicle
CN101498849A (en) * 2008-01-30 2009-08-05 汉王科技股份有限公司 Hand-written LCD

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4947156A (en) * 1984-11-16 1990-08-07 Sharp Kabushiki Kaisha Handwritten character input device
CN2080917U (en) * 1990-12-06 1991-07-17 汤小戈 Adjustable headlight of vehicle
CN101498849A (en) * 2008-01-30 2009-08-05 汉王科技股份有限公司 Hand-written LCD

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8982090B2 (en) 2012-01-01 2015-03-17 Cypress Semiconductor Corporation Optical stylus synchronization

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