JPWO2015141349A1 - 位置検出装置 - Google Patents
位置検出装置 Download PDFInfo
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- 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
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- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
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- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
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- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
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- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
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- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
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- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
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- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
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- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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- G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
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- 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
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Abstract
Description
図1は本発明による位置検出装置の第1の実施形態の構成図である。図1において11は透明センサーで、ITO(Indium Tin Oxide)のラインが、透明センサー11のX,Y座標のX軸方向に複数配列してなるX電極と、ITOのラインがX,Y座標のY軸方向に複数配列してなるY電極とが設けられている。透明センサー11は図示しないLCD(Liquid Crystal Display;液晶ディスプレイ)パネルと一体に配置され、透明センサー11の位置検出領域がLCDパネルの表示領域とちょうど重なるようになっている。なお透明センサー11上のX電極およびY電極はACF(Anisotropic conductive film)接続により図示しないフレキシブル基板を経由して図示しないプリント基板に接続されている。
図7は、位相制御回路の他の例を示した図で、図3と同一構成の部分は同一符号にて示す。27aはCPU、30および31はフリップフロップである。
図12は本発明の第2の実施形態による位置検出装置の構成図で、指によるタッチ位置を検出して入力する場合の例について示したものである。図12において図1と同一構成要素は同一符号にて示す。即ち、11は透明センサー、12はノイズ検出電極、13はノイズ検出回路、14はパルス発生回路、15は位相制御回路、21はコントロール回路、22はバンドパスフィルター回路、23はスイッチ、24は検波回路、25はAD変換回路、26はマイクロプロセッサである。
本発明によれば、表示装置が発生するノイズを検出して、予め判っている表示装置の水平同期周波数に対応した周期で動作するパルス発生回路を設けて、パルス発生回路が出力するパルスのタイミングと表示装置が発生するノイズのタイミングとが一致するように制御するとともに、パルス発生回路が出力するパルスに同期して信号検出を行うようにしたので、表示装置が発生するノイズの影響を受けることなくスタイラスや指による座標位置を正確に検出して入力することができる。
なお、上述した第1の実施形態においては、差動増幅回路20を用いることで2本の受信電極に同様に重畳されるノイズをキャンセルするようにした。しかし、表示装置がノイズを発する期間はスイッチ23をオフにすることによりバンドバスフィルタ22に供給しないようになるので、図13に示すように、差動増幅回路17を用いずに、増幅回路20´を用いるように構成してもよい。その場合には、図13に示すように、X選択回路17´、Y選択回路18´は、それぞれ1本のX電極、1本のY電極を選択する構成となり、また、切替回路19´は、X選択回路17´で選択された1本ずつのX電極と、Y選択回路18´で選択された1本ずつのY電極とのいずれかを選択する構成となる。
上述の実施形態において説明したように、ノイズセンサー12、12Lは、透明センサーと一体に配置されたLCDパネルの周辺に配置している。以下に、ノイズセンサーの具体的な構成例及び配置位置の例について述べる。
12 ノイズ検出電極
13 ノイズ検出回路
14、14a パルス発生回路
15 位相制御回路
16 スタイラス
17、32 X選択回路
18、33 Y選択回路
19 切替回路
20 差動増幅回路
21 コントロール回路
22 バンドパスフィルター回路
23 スイッチ
24 検波回路
25 AD変換回路
26 マイクロプロセッサ
27、27a CPU
28、29 アンドゲート
30、31 フリップフロップ
34 発信器
35 増幅回路
41 LCDパネル
43 シールド部材
43W 開口部
12C ノイズセンサー
Claims (8)
- 一定周期毎に表示をリフレッシュ可能な表示装置上での指またはスタイラスによる指示位置を検出する位置検出装置において、
前記表示装置またはその駆動回路の周辺に配置したノイズセンサーと、
前記ノイズセンサーに入力されるノイズが所定レベル以上であった際にノイズ検出情報を出力するノイズ検出回路と、
前記表示装置の水平同期パルスの既知の周期と同一周期でパルスを発生するパルス発生回路と、
前記パルス発生回路が出力するパルスに同期した所定時間内に前記ノイズ検出回路からの前記ノイズ検出情報が出力されるように前記パルス発生回路が出力するパルスの位相を制御する位相制御手段と、
前記パルス発生回路が出力するパルスのタイミングに同期して指またはスタイラスによる信号を受信する受信回路と、
を設けたことを特徴とする位置検出装置。 - 前記位相制御手段は、前記パルス発生回路が出力するパルスに同期した所定時間内に前記ノイズ検出回路からの前記ノイズ検出情報が出力される頻度が一定値以上となるように前記パルス発生回路が出力するパルスの位相を制御する
ことを特徴とする請求項1に記載の位置検出装置。 - 前記位相制御手段は、
前記パルス発生回路が出力するパルスのタイミングに対して前記ノイズ検出回路からの前記ノイズ検出情報が出力されるタイミングが一定時間内の差で早く現れた際に前進情報を出力し、前記パルス発生回路が出力するパルスのタイミングに対して前記ノイズ検出回路からのノイズ検出情報が出力されるタイミングが一定時間内の差で遅れて現れた際に遅延情報を出力するようにして、
前記遅延情報が現れる頻度に対して前記前進情報が現れる頻度が高い場合には前記パルス発生回路が出力するパルスの周期を僅かに短く調整し、前記前進情報が現れる頻度に対して遅延情報が現れる頻度が高い場合には前記パルス発生回路が出力するパルスの周期を僅かに長く調整する
ことを特徴とする請求項2に記載の位置検出装置。 - 前記位相制御手段は、前記所定時間を前半期間および後半期間の2つの期間に分けて、前記前半期間に前記ノイズ検出回路からの前記ノイズ検出情報が出力された際に前記前進情報を出力し、前記後半期間に前記ノイズ検出回路からの前記ノイズ検出情報が出力された際に前記遅延情報を出力するようにした
ことを特徴とする請求項3に記載の位置検出装置。 - 前記パルス発生回路が、前記所定時間と同一タイミングで同一時間幅のパルスを出力するとともに、
前記位相制御手段は、前記パルス発生回路が出力するパルスの立ち上がりエッジで前記ノイズ検出回路からの前記ノイズ検出情報が現れた際に前記前進情報を出力し、前記パルス発生回路が出力するパルスの立ち下がりエッジで前記ノイズ検出回路からの前記ノイズ検出情報が現れた際に前記遅延情報を出力するようにした
ことを特徴とする請求項3に記載の位置検出装置。 - 前記表示装置及びその駆動回路は、シールド部材に覆われており、
前記ノイズセンサーは、前記シールド部材の外側において、前記シールド部材に設けられた開口部を通じてノイズを検出するように設けられる
ことを特徴とする請求項1に記載の位置検出装置。 - 前記開口部は、前記表示装置の駆動回路の周辺に設けられており、前記ノイズセンサーは、前記表示装置の駆動回路からのノイズを検出するようにする
ことを特徴とする請求項6に記載の位置検出装置。 - 前記開口部は、前記表示装置の横方向または縦方向の電極線の全て、又は一部を含む領域に対応して設けられており、前記ノイズセンサーは、前記表示装置の電極線からのノイズを検出するようにする
ことを特徴とする請求項6に記載の位置検出装置。
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014053505 | 2014-03-17 | ||
JP2014053505 | 2014-03-17 | ||
JP2014086269 | 2014-04-18 | ||
JP2014086269 | 2014-04-18 | ||
PCT/JP2015/054209 WO2015141349A1 (ja) | 2014-03-17 | 2015-02-17 | 位置検出装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPWO2015141349A1 true JPWO2015141349A1 (ja) | 2017-04-06 |
JP6180621B2 JP6180621B2 (ja) | 2017-08-16 |
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EP (1) | EP3121692A1 (ja) |
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CN113238669B (zh) | 2015-04-09 | 2023-08-08 | 株式会社和冠 | 主动式触控笔 |
US10845195B2 (en) | 2015-07-01 | 2020-11-24 | Solitonreach, Inc. | System and method for motion based alignment of body parts |
US10698501B2 (en) * | 2015-07-01 | 2020-06-30 | Solitonreach, Inc. | Systems and methods for three dimensional control of mobile applications |
JP6824992B2 (ja) | 2016-09-01 | 2021-02-03 | 株式会社ワコム | スタイラス、センサコントローラ、及び電子定規 |
US10474286B2 (en) * | 2016-10-25 | 2019-11-12 | Lg Display Co., Ltd. | Touch display device, active pen, touch system, touch circuit, and pen recognition method |
US10496205B2 (en) * | 2016-12-28 | 2019-12-03 | Lg Display Co., Ltd. | Touch sensing system and method of driving the same |
CN108958518B (zh) * | 2017-05-18 | 2021-08-06 | 群创光电股份有限公司 | 触控系统及其控制方法 |
KR102508964B1 (ko) | 2018-01-31 | 2023-03-14 | 삼성디스플레이 주식회사 | 표시 장치 |
US10686432B2 (en) * | 2018-08-24 | 2020-06-16 | Synaptics Incorporated | Waveform generation circuit for finely tunable sensing frequency |
KR102600924B1 (ko) * | 2018-12-27 | 2023-11-10 | 엘지디스플레이 주식회사 | 터치표시장치 및 터치구동회로 |
CN113053280B (zh) * | 2019-12-26 | 2023-12-22 | 乐金显示有限公司 | 显示装置 |
CN113138689A (zh) * | 2020-01-20 | 2021-07-20 | 京东方科技集团股份有限公司 | 显示面板及其制作方法、显示装置和触控信号的处理方法 |
CN113220144B (zh) * | 2021-03-15 | 2022-06-07 | 荣耀终端有限公司 | 触控笔 |
KR20220136547A (ko) * | 2021-03-30 | 2022-10-11 | 삼성디스플레이 주식회사 | 표시 장치 |
WO2023007646A1 (ja) | 2021-07-29 | 2023-02-02 | 株式会社ワコム | ペン信号の検出方法、センサコントローラ、及び位置検出システム |
CN113721788A (zh) * | 2021-08-31 | 2021-11-30 | 北京云蝶智学科技有限公司 | 一种手写输入定位系统 |
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JPH0535400A (ja) * | 1991-07-25 | 1993-02-12 | Nitsuko Corp | デイスプレイ付入力装置 |
JP2006079405A (ja) * | 2004-09-10 | 2006-03-23 | Oki Electric Ind Co Ltd | 情報処理装置、及び情報処理装置の制御方法 |
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- 2015-02-17 JP JP2016508599A patent/JP6180621B2/ja active Active
- 2015-02-17 EP EP15764878.3A patent/EP3121692A1/en not_active Withdrawn
- 2015-02-17 CN CN201580013703.0A patent/CN106104437A/zh active Pending
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2016
- 2016-09-12 US US15/262,819 patent/US20160378265A1/en not_active Abandoned
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JPH0535400A (ja) * | 1991-07-25 | 1993-02-12 | Nitsuko Corp | デイスプレイ付入力装置 |
JP2006079405A (ja) * | 2004-09-10 | 2006-03-23 | Oki Electric Ind Co Ltd | 情報処理装置、及び情報処理装置の制御方法 |
JP2010002946A (ja) * | 2008-06-18 | 2010-01-07 | Brother Ind Ltd | 表示端末 |
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JP6180621B2 (ja) | 2017-08-16 |
WO2015141349A1 (ja) | 2015-09-24 |
CN106104437A (zh) | 2016-11-09 |
EP3121692A1 (en) | 2017-01-25 |
US20160378265A1 (en) | 2016-12-29 |
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