公开(公告)号：EP0917039A3

公开(公告)日：2000-07-12

申请号：EP98121409.1

申请日：1998-11-11

申请人： SHARP KABUSHIKI KAISHA

发明人： Okajima, Yoshio ,  Masuda, Akihiro

IPC分类号： G06F3/033 ,  G06K11/12

CPC分类号： G06F3/045 ,  G06F1/3262

摘要： A liquid crystal tablet equipment which allows improvement in accuracy of coordinate measurements by removing undesirable influence of noise caused by line pulse signals applied to a liquid crystal display and allows coordinate measurement in shorter time period includes a liquid crystal display (15), a liquid crystal display control circuit (14) for applying the line pulse signals at a prescribed interval to each of an array of pixels constituting the liquid crystal display (15), a tablet (17) stacked on the liquid crystal display (15), an A/D converter (18) receiving a coordinate signal output from the tablet (17), a tablet control circuit (16) for calculating coordinate data from a digital signal output from the A/D converter (18), and a CPU (11) for letting A/D converter (18) output the digital signal after a prescribed time period from a timing of activation of the line pulse signal.

公开(公告)号：EP0709762B1

公开(公告)日：2001-09-12

申请号：EP95109263.4

申请日：1995-06-14

申请人： SHARP KABUSHIKI KAISHA

发明人： Okajima, Yoshio ,  Kimura, Kazumasa ,  Nishida, Tazo

IPC分类号： G06F1/26 ,  G06F3/033 ,  G06F1/32

CPC分类号： G06F3/045

公开(公告)号：EP0917039B1

公开(公告)日：2003-06-18

申请号：EP98121409.1

申请日：1998-11-11

申请人： SHARP KABUSHIKI KAISHA

发明人： Okajima, Yoshio ,  Masuda, Akihiro

IPC分类号： G06F3/033 ,  G06K11/12

CPC分类号： G06F3/045 ,  G06F1/3262

公开(公告)号：EP0917039A2

公开(公告)日：1999-05-19

申请号：EP98121409.1

申请日：1998-11-11

申请人： SHARP KABUSHIKI KAISHA

发明人： Okajima, Yoshio ,  Masuda, Akihiro

IPC分类号： G06F3/033 ,  G06K11/12

CPC分类号： G06F3/045 ,  G06F1/3262

摘要： A liquid crystal tablet equipment which allows improvement in accuracy of coordinate measurements by removing undesirable influence of noise caused by line pulse signals applied to a liquid crystal display and allows coordinate measurement in shorter time period includes a liquid crystal display (15), a liquid crystal display control circuit (14) for applying the line pulse signals at a prescribed interval to each of an array of pixels constituting the liquid crystal display (15), a tablet (17) stacked on the liquid crystal display (15), an A/D converter (18) receiving a coordinate signal output from the tablet (17), a tablet control circuit (16) for calculating coordinate data from a digital signal output from the A/D converter (18), and a CPU (11) for letting A/D converter (18) output the digital signal after a prescribed time period from a timing of activation of the line pulse signal.

摘要翻译： 一种液晶平板设备，其通过消除由施加到液晶显示器的线脉冲信号引起的噪声的不期望的影响，从而提高坐标测量的精度，并且允许在较短时间段内的坐标测量包括液晶显示器（15），液晶 显示控制电路（14），用于以构成液晶显示器（15）的像素阵列中的每一个施加规定间隔的线路脉冲信号;堆叠在液晶显示器（15）上的片剂（17），A / D转换器（18），接收从所述平板电脑（17）输出的坐标信号;平板电脑控制电路（16），用于从所述A / D转换器（18）输出的数字信号计算坐标数据;以及CPU（11） 使A / D转换器（18）从线路脉冲信号的激活定时起经过规定的时间段后输出数字信号。

公开(公告)号：EP0709762A3

公开(公告)日：1996-10-30

申请号：EP95109263.4

申请日：1995-06-14

申请人： SHARP KABUSHIKI KAISHA

发明人： Okajima, Yoshio ,  Kimura, Kazumasa ,  Nishida, Tazo

IPC分类号： G06F1/26 ,  G06F3/033

CPC分类号： G06F3/045

摘要： A touch panel input apparatus has a touch panel which consists of X- and Y-direction electrode panels. When the apparatus is in an power-off state, one end of the X electrode panel is intermittently connected to a power source and one end of the Y electrode panel is intermittently grounded via an output resistor, in response to control signals (YHC, SMPC) outputted from a sampling circuit (30, 31, 32, 33, 34, 35, 36, 37). In this state, synchronously with a clock signal (CLK), the sampling circuit (30, 31, 32, 33, 34, 35, 36, 37) performs sampling of a voltage (TABIN) developed across the output resistor when the two electrode panels is brought into contact. The sampling means outputs a power-on instruction signal (ON) to make the CPU perform the power-on operation. The sampling circuit stops its sampling operation once power is turned on.

公开(公告)号：EP0709762A2

公开(公告)日：1996-05-01

申请号：EP95109263.4

申请日：1995-06-14

申请人： SHARP KABUSHIKI KAISHA

发明人： Okajima, Yoshio ,  Kimura, Kazumasa ,  Nishida, Tazo

IPC分类号： G06F1/26 ,  G06F3/033

CPC分类号： G06F3/045

摘要： A touch panel input apparatus has a touch panel which consists of X- and Y-direction electrode panels. When the apparatus is in an power-off state, one end of the X electrode panel is intermittently connected to a power source and one end of the Y electrode panel is intermittently grounded via an output resistor, in response to control signals (YHC, SMPC) outputted from a sampling circuit (30, 31, 32, 33, 34, 35, 36, 37). In this state, synchronously with a clock signal (CLK), the sampling circuit (30, 31, 32, 33, 34, 35, 36, 37) performs sampling of a voltage (TABIN) developed across the output resistor when the two electrode panels is brought into contact. The sampling means outputs a power-on instruction signal (ON) to make the CPU perform the power-on operation. The sampling circuit stops its sampling operation once power is turned on.

摘要翻译： 触摸面板输入装置具有由X方向和Y方向电极面板组成的触摸面板。 当设备处于断电状态时，X电极面板的一端间歇地连接到电源，并且Y电极面板的一端经由输出电阻器间歇地接地，响应于控制信号（YHC，SMPC ）从采样电路（30,31,32,33,34,35,36,37）输出。 在这种状态下，与时钟信号（CLK）同步，采样电路（30,31,32,33,34,35,36,37）对两个电极（TIBIN）进行采样， 面板接触。 采样装置输出通电指示信号（ON），使CPU执行通电操作。 电源打开后，采样电路停止采样操作。