According to a suitable input pen and touch panel type digital instrument panel driving control signal driving panel (200) of the four corners of the four channel drive signal, the control device through the digitizer coordinate data recognition pen or finger contact position (100), the output of the digital control device includes: a a panel driving signal generator (10), used to receive the first clock signal having a predetermined frequency, to produce the required entry in the pen and the finger touch mode has a predetermined frequency second panel driving signal; a four channel driving part (16), for receiving the panel driving signal generator (10) provided by the a panel driving signal according to the corresponding panel and working mode of the driving control signal corresponding to the driving signal pathway, were provided to The panel (200) each angle; a current voltage converter (18), used to detect the inflow or outflow of the panel (200) changes the current angle; a differential amplifier (20), used in the finger touch mode produced with current in the voltage variable the output of the converter (18) and the four channel driver (16) provides the driving signal pathway between the differential component four pathway corresponding to the difference signal; a second multiplexer (22), have been used to select from the differential amplifier (20) output four channel difference the signal, signal will be selected as a finger touch signal output; a third multiplexer (26), according to the instruction input pen or finger touch mode selecting signal selection The output from the second multiplexer (22) finger touch signal output and input signal from one of the two input output pen pen; a fourth multiplexer (34), according to a predetermined reference voltage and the second output selection panel from the mode select signal (200) output signal according to the touch panel two one; a band-pass filter (28), from the third to the multiplexer (26) filter out frequency component in the output panel driving signal; a rectifier (30), used to filter on the belt (28) of the output rectifier; a fifth multiplexer (36 according to the selected output), the rectifier mode selection signal (30) output and the fourth multiplexer (34) one of the two outputs; A low pass filter (38), from the fifth to the multiplexer (36) output detection basically is a DC component; an analog-to-digital converter (44), and used to drive control panel signal synchronization of the low-pass filter (38) output is converted into digital signal. As a coordinate signal output; and an interface (46), used to receive the control command processor provides the control commands are generated by interpreting the received instructions that the stylus, finger touch or press the mode select signal mode and touch panel driver and selected panel mode corresponding control signal, and the the analog-to-digital converter (44) sends a signal to a microprocessor to provide coordinates.
【技术实现步骤摘要】
本专利技术与数字化仪控制装置(digitizer controller)有关,具体地说,与能用半导体集成电路实现的可用于录入笔型(stylus type)、手指触摸型(finger touch type)和按触面板型(touch panel type)数字化仪的数字化仪控制装置有关。个人计算机、便携式发送机、个人信息处理机等都要利用诸如键盘、鼠标器或数字化仪之类的输入装置来处理文本或图形数据。数字化仪用来以数字方式检测笔或手指在一个专制的平整面板上的位置,输出位置的X和Y座标;与常用的鼠标器、键盘或扫描器相比,具有图形和字符输入既方便又精确的优点。此外,数字化仪可以预料会代替常用的传统输入装置。数字化仪有三种类型利用专用笔的录入笔型,利用手指的手指触摸型,以及利用普通笔或任何指点物的按触面板型。录入笔型广泛地用于图形或CAD应用。手指触摸型用于使用触摸屏显示器的设备。按触面板型用于个人数字辅助设备(PDA)或电子机构。为了实现数字化仪的系统,需要配备指定座标数据的图形输入板,确定在图形输入板所表示的座标系统中的位置的诸如录入笔、普通触笔或手指那样的指点器,以及控制以上各件的数字化仪控制装置。图形输入板有一个专制的矩形面板。这个面板可以是敷有一层电阻性薄膜(对于录入笔型或手指触摸型),也可以是由两片电阻性物质构成,这两片配置成由衬垫隔开,而在受压时能够接触(对于按触面板型)。在将AC信号(对于录入笔型和手指触摸型)或DC信号(对于按触面板型)加到面板的四个角上时,如果指点器所指位置不同,所检测到的信号也就不同,因此就能识别指点器所指的位置。这种面板和控 ...
【技术保护点】
【技术特征摘要】
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