JP2009289235A5 - - Google Patents
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- JP2009289235A5 JP2009289235A5 JP2008144278A JP2008144278A JP2009289235A5 JP 2009289235 A5 JP2009289235 A5 JP 2009289235A5 JP 2008144278 A JP2008144278 A JP 2008144278A JP 2008144278 A JP2008144278 A JP 2008144278A JP 2009289235 A5 JP2009289235 A5 JP 2009289235A5
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- 238000001514 detection method Methods 0.000 claims 90
- 230000000875 corresponding Effects 0.000 claims 4
- 239000000758 substrate Substances 0.000 claims 4
- 230000001276 controlling effect Effects 0.000 claims 3
- 239000003990 capacitor Substances 0.000 claims 1
- 238000007599 discharging Methods 0.000 claims 1
Claims (7)
前記透明基板に所定の間隔で形成され、前記透明基板の列方向に伸在し且つ行方向に沿って配列された、導電膜から成るN(N≧2)本の検出用列配線と、
前記透明基板上に前記複数の検出用列配線と立体交差する様に所定の間隔で形成され、前記透明基板の前記行方向に伸在し且つ前記列方向に沿って配列された、前記導電膜から成るM(M≧2)本の検出用行配線と、
タッチした指示体と前記検出用列配線との間に形成される静電容量及び前記指示体と前記検出用行配線との間に形成される静電容量を検出する容量検出回路と、
それぞれが前記N本の検出用列配線の内の対応する検出用列配線を前記容量検出回路の入力端に接続するN個のスイッチを有する第1検出線選択スイッチ回路と、
それぞれが前記M本の検出用行配線の内の対応する検出用行配線を前記容量検出回路の入力端に接続するM個のスイッチを有する第2検出線選択スイッチ回路と、
前記第1検出線選択スイッチ回路の前記N個のスイッチの選択接続及び前記第2検出線選択スイッチ回路の前記M個のスイッチの選択接続を制御する検出制御回路と、
前記容量検出回路が出力する計数結果に基づいて、前記指示体のタッチ位置の位置座標を算出するタッチ座標算出回路とを備えており、
(1)タッチ検出モードの場合には、
前記検出制御回路は、
前記第1検出線選択スイッチ回路に対しては、n(n≧2且つN=α×n:αは自然数)個の隣合うスイッチを同時に接続状態にしてn本の隣合う検出用列配線を1本の検出用列配線群として一まとめにして前記容量検出回路の前記入力端に接続する状態で、α本の前記検出用列配線群がスキャンされる様に前記N個のスイッチのオン・オフ状態を制御するスイッチング制御信号を出力する一方、
前記第2検出線選択スイッチ回路に対しては、m(m≧2且つM=β×m:βは自然数)個の隣合うスイッチを同時に接続状態にしてm本の隣合う検出用行配線を1本の検出用行配線群として一まとめにして前記容量検出回路の前記入力端に接続する状態で、β本の前記検出用行配線群がスキャンされる様に前記M個のスイッチのオン・オフ状態を制御するスイッチング制御信号を出力し、
前記タッチ座標算出回路は、α個の計数結果の中で最大値となる計数結果を与える検出用列配線群に属するn本の検出用列配線を含む検出用列配線を、位置検出モードに於いて再度スキャンすべきタッチ検出列配線として特定し、且つ、β個の計数結果の中で最大値となる計数結果を与える検出用行配線群に属するm本の検出用列配線を含む検出用行配線を、位置検出モードに於いて再度スキャンすべきタッチ検出行配線として特定した上で、前記検出制御回路に対して、前記位置検出モードで前記第1及び第2検出線選択スイッチ回路を制御する様に指令し、
(2)前記位置検出モードの場合には、
前記検出制御回路は、
前記第1検出線選択スイッチ回路に対しては、前記タッチ検出列配線の各々を1本毎に前記容量検出回路の前記入力端に接続する様に、前記タッチ検出列配線の各々に対応するスイッチを1個ずつ接続状態に制御するスイッチング制御信号を出力する一方、
前記第2検出線選択スイッチ回路に対しては、前記タッチ検出行配線の各々を1本毎に前記容量検出回路の前記入力端に接続する様に、前記タッチ検出行配線の各々に対応するスイッチを1個ずつ接続状態に制御するスイッチング制御信号を出力すると共に、
前記タッチ座標算出回路は、前記タッチ検出列配線の各々が前記容量検出回路の前記入力端に接続されたときに前記容量検出回路が出力する計数結果に基づいて、前記指示体と前記タッチ検出列配線の各々との間に形成される各静電容量を検出し、且つ、前記タッチ検出行配線の各々が前記容量検出回路の前記入力端に接続されたときに前記容量検出回路が出力する計数結果に基づいて、前記指示体と前記タッチ検出行配線の各々との間に形成される各静電容量を検出することで、各静電容量検出結果に基づいて前記指示体の前記タッチ位置の前記位置座標を算出することを特徴とする、
タッチパネル。 A transparent substrate;
Said formed of a transparent base a predetermined distance to plate, the Shin Mashimashi are and arranged in the row direction in the column direction of the transparent substrate, N (N ≧ 2) made of a conductive film the detection column wire,
The conductive film formed on the transparent substrate at a predetermined interval so as to three-dimensionally intersect the plurality of detection column wirings, extending in the row direction of the transparent substrate, and arranged along the column direction M (M ≧ 2) detection row wirings consisting of:
A capacitance detection circuit for detecting a capacitance formed between the touched indicator and the detection column wiring and a capacitance formed between the indicator and the detection row wiring ;
A first detection line selection switch circuit having N switches each connecting a corresponding detection column wiring of the N detection column wirings to an input terminal of the capacitance detection circuit ;
A second detection line selection switch circuit having M switches each connecting a corresponding detection row wiring of the M detection row wirings to an input terminal of the capacitance detection circuit ;
A detection control circuit that controls the selective connection of the M switches of the N switches in the switched connection and said second detection line selection switch circuit of the first detection line selection switch circuits,
Based on the count result of the capacitance detection circuit outputs, and a touch coordinate calculation circuit for calculating the position coordinates of the touch position before Symbol indicator,
(1) In the touch detection mode,
The detection control circuit includes:
For the first detection line selection switch circuit, n (n ≧ 2 and N = α × n: α is a natural number) adjacent switches are simultaneously connected to provide n adjacent detection column wirings. in a state where as a block as detection column wire group of one to connect to the input terminal of the capacitance detection circuit, the on-the N switches as being the detection column wire group gas scan of α present -While outputting a switching control signal to control the OFF state,
For the second detection line selection switch circuit, m (m ≧ 2 and M = β × m: β is a natural number) adjacent switches are connected at the same time so that m adjacent detection row wirings are provided. in a state where as a block as detection row wire group of one to connect to the input terminal of the capacitance detection circuit, the on-the M switches as being the detection row wire group gas scan of β present・ Output the switching control signal to control the OFF state ,
The touch coordinate calculation circuit, the detection column wiring including α number of counting results n detection column wires of the belonging to the detection column wire group giving the counting result with the maximum value among the position detection mode For detection including touch detection column wirings to be scanned again and including m detection column wirings belonging to a detection row wiring group that gives a counting result that is the maximum value among β counting results the Gyohai line, on identified as the touch detection row wire to be scanned again at the position detection mode, to the detection control circuit, said first and second detection line selection switch circuits in the position detection mode Command to control,
(2) In the case of the position detection mode,
The detection control circuit includes:
For the first detection line selection switch circuit, a switch corresponding to each of the touch detection column wirings so that each of the touch detection column wirings is connected to the input terminal of the capacitance detection circuit one by one. while outputting a switching control signal for controlling the one by one connected state,
For the second detection line selection switch circuit, a switch corresponding to each of the touch detection row wirings so that each of the touch detection row wirings is connected to the input terminal of the capacitance detection circuit one by one. the outputs a switching control signal for controlling the one by one connected state,
The touch coordinate calculation circuit, based on the capacitance detection circuit outputs the counting result when each of the touch detection column wire is connected to said input end of said capacitance detecting circuit, the touch detection sequence and the indicator detects each electrostatic capacitance formed between each of the wiring, and the capacitance count detecting circuit outputs when each of said touch detection row wire is connected to said input end of said capacitance detecting circuit Based on the result, by detecting each capacitance formed between the indicator and each of the touch detection row wirings, the touch position of the indicator is detected based on each capacitance detection result. Calculating the position coordinates,
Touch panel.
前記位置検出モードの場合に、前記タッチ座標算出回路は、α個の計数結果の中で最大値となる計数結果を与える検出用列配線群に属するn本の検出用列配線と、当該検出用列配線群に隣接する検出用列配線とを、再度スキャンすべきタッチ検出列配線として特定し、且つ、β個の計数結果の中で最大値となる計数結果を与える検出用行配線群に属するm本の検出用列配線と、当該検出用行配線群に隣接する検出用行配線とを、再度スキャンすべきタッチ検出行配線として特定した上で、前記検出制御回路に対して、前記位置検出モードで前記第1及び第2検出線選択スイッチ回路を制御する様に指令することを特徴とする、In the case of the position detection mode, the touch coordinate calculation circuit includes n detection column wirings belonging to a detection column wiring group that gives a maximum count result among α count results, and the detection The detection column wiring adjacent to the column wiring group is specified as the touch detection column wiring to be scanned again, and belongs to the detection row wiring group that gives the maximum count result among the β count results. The m detection column wirings and the detection row wirings adjacent to the detection row wiring group are specified as touch detection row wirings to be scanned again, and the position detection is performed on the detection control circuit. Instructing to control the first and second detection line selection switch circuits in a mode,
タッチパネル。Touch panel.
前記容量検出回路は、The capacitance detection circuit includes:
前記検出制御回路により制御される発振回路と、An oscillation circuit controlled by the detection control circuit;
前記検出制御回路の制御の下で前記発振回路の出力信号の発振周期を計数して、前記発振周期の計数を開始してから前記発振周期の計数値が所定の計数値に達するまでの期間を計数する計数回路とを備えることを特徴とする、Under the control of the detection control circuit, the oscillation period of the output signal of the oscillation circuit is counted, and the period from the start of the oscillation period count until the count value of the oscillation period reaches a predetermined count value A counting circuit for counting,
タッチパネル。Touch panel.
前記検出制御回路は、前記発振回路に接続された検出用配線で形成される容量を充電あるいは放電する電流を決定する回路定数を制御することを特徴とする、The detection control circuit controls a circuit constant that determines a current for charging or discharging a capacitor formed by a detection wiring connected to the oscillation circuit.
タッチパネル。Touch panel.
前記タッチ検出モードの場合に於いてのみ、Only in the touch detection mode,
前記検出制御回路は、The detection control circuit includes:
前記第1検出線選択スイッチ回路に対しては、各隣合う両検出用列配線群がタイミング的に前記発振回路の前記入力端に重なって接続される状態が無い期間が存在しない様に、前記N個のスイッチのオン・オフ状態を制御するスイッチング制御信号を出力する一方、For the first detection line selection switch circuit, there is no period in which there is no state in which both adjacent detection column wiring groups are connected to the input terminal of the oscillation circuit in a timely manner. While outputting a switching control signal that controls the ON / OFF state of the N switches,
前記第2検出線選択スイッチ回路に対しては、各隣合う両検出用行配線群がタイミング的に前記発振回路の前記入力端に重なって接続される状態が無い期間が存在しない様に、前記M個のスイッチのオン・オフ状態を制御するスイッチング制御信号を出力することを特徴とする、For the second detection line selection switch circuit, the adjacent detection row wiring groups do not have a period in which there is no state of being connected to the input terminal of the oscillation circuit in a timely manner. A switching control signal for controlling the on / off state of the M switches is output.
タッチパネル。Touch panel.
前記発振回路は、The oscillation circuit is
前記発振回路の前記入力端をそのプラス入力端子とし、その出力信号が前記発振回路の前記出力信号となるコンパレータ回路を備えており、The input terminal of the oscillation circuit is a positive input terminal, and the output signal is provided with a comparator circuit that becomes the output signal of the oscillation circuit,
前記検出制御回路は、The detection control circuit includes:
前記コンパレータ回路のマイナス入力端子とグランド間に接続される比較基準電圧の電圧値が、前記タッチ検出モードの場合には、前記位置検出モードの場合よりも小さくなる様に、前記比較基準電圧を制御することを特徴とする、The comparison reference voltage is controlled so that the voltage value of the comparison reference voltage connected between the negative input terminal of the comparator circuit and the ground is smaller in the touch detection mode than in the position detection mode. It is characterized by
タッチパネル。Touch panel.
前記検出制御回路は、The detection control circuit includes:
前記計数回路に設定される前記所定の計数値が、前記タッチ検出モードの場合には、前記位置検出モードの場合よりも小さくなる様に、前記計数回路を制御することを特徴とする、The count circuit is controlled so that the predetermined count value set in the count circuit is smaller in the touch detection mode than in the position detection mode.
タッチパネル。Touch panel.
Priority Applications (1)
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JP2008144278A JP5127572B2 (en) | 2008-06-02 | 2008-06-02 | Touch panel |
Applications Claiming Priority (1)
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JP2008144278A JP5127572B2 (en) | 2008-06-02 | 2008-06-02 | Touch panel |
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JP2009289235A JP2009289235A (en) | 2009-12-10 |
JP2009289235A5 true JP2009289235A5 (en) | 2011-02-24 |
JP5127572B2 JP5127572B2 (en) | 2013-01-23 |
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TWI472993B (en) * | 2009-02-11 | 2015-02-11 | Elan Microelectronics Corp | Touch circuit and scanning method of capacitive touch sensor |
KR101474897B1 (en) | 2009-12-28 | 2014-12-19 | 쿄세라 코포레이션 | Input device and display device provided with same |
DE112010005275B4 (en) * | 2010-02-17 | 2018-10-25 | Mitsubishi Electric Corporation | Touch panel device |
JP5528926B2 (en) * | 2010-07-09 | 2014-06-25 | 株式会社ジャパンディスプレイ | Detection device and display device |
JP5424494B2 (en) * | 2010-08-20 | 2014-02-26 | 株式会社ジャパンディスプレイ | Detection device, display device, and electronic device |
KR20140026322A (en) * | 2010-08-23 | 2014-03-05 | 사이프레스 세미컨덕터 코포레이션 | Mutual capacitance sensing circuits, methods and systems |
US9013441B2 (en) | 2010-08-24 | 2015-04-21 | Cypress Semiconductor Corporation | Smart scanning for a capacitive sensing array |
TWI571788B (en) | 2011-03-21 | 2017-02-21 | 宸鴻光電科技股份有限公司 | Touch sensing device and scanning method thereof |
EP2562627B1 (en) * | 2011-08-26 | 2016-11-09 | LG Display Co., Ltd. | Touch sensing device |
KR101420512B1 (en) * | 2011-11-10 | 2014-07-17 | 엘지디스플레이 주식회사 | Touch sensing apparatus |
KR101898979B1 (en) | 2012-02-16 | 2018-09-17 | 삼성디스플레이 주식회사 | Method of operating a touch panel, touch panel and display device |
US8860682B1 (en) | 2013-04-22 | 2014-10-14 | Cypress Semiconductor Corporation | Hardware de-convolution block for multi-phase scanning |
WO2015138984A1 (en) | 2014-03-14 | 2015-09-17 | The Regents Of The University Of California | Bootstrapped and correlated double sampling (bcds) non-contact touch sensor for mobile devices |
EP3132330B1 (en) * | 2014-04-16 | 2019-07-03 | Neodrón Limited | Determining touch locations and forces thereto on a touch and force sensing surface |
KR102302139B1 (en) | 2015-01-27 | 2021-09-14 | 삼성디스플레이 주식회사 | Touch display device and driving method thereof |
JP7092480B2 (en) * | 2017-09-27 | 2022-06-28 | エルジー ディスプレイ カンパニー リミテッド | Sensor device and its control method |
JP2019061543A (en) * | 2017-09-27 | 2019-04-18 | エルジー ディスプレイ カンパニー リミテッド | Sensor device and method for controlling the same |
JP6631612B2 (en) * | 2017-12-18 | 2020-01-15 | Smk株式会社 | Touch panel input position detection method |
KR20230076005A (en) | 2021-11-23 | 2023-05-31 | 엘지디스플레이 주식회사 | Touch driving circuit and touch display device |
CN114389591B (en) * | 2022-01-17 | 2022-10-14 | 上海晟矽微电子股份有限公司 | Touch detection circuit, touch detection chip and electronic equipment |
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