【０００１】[0001]
【発明の属する技術分野】この発明は、タッチ操作面の
周囲に配置した発光素子群と受光素子群との間で光線を
走査させ、該光線の遮断状態からタッチ操作位置を検出
してスイッチ入力を行う光タッチスイッチ装置の改良技
術に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of scanning a light beam between a light emitting element group and a light receiving element group disposed around a touch operation surface, detecting a touch operation position from a cutoff state of the light beam, and inputting a switch. The present invention relates to an improved technology of an optical touch switch device that performs the following.
【０００２】[0002]
【従来の技術】従来の発光素子群と受光素子群との間で
光線を走査させ、該光線の遮断状態からタッチ操作位置
を検出してスイッチ入力を行う光タッチスイッチ装置
は、特開平２−１２３６２６号公報等に示したものが有
った。この従来の光タッチスイッチ装置では、前記発光
素子群を構成する各発光素子に対して出力回路から個別
に信号線を接続し、これによって各発光素子の１つ１つ
を順々に駆動し、各発光素子から走査光線を発してい
た。同様に、前記受光素子群を構成する各受光素子に対
しても入力回路から個別に信号線を接続していた。2. Description of the Related Art A conventional optical touch switch device which scans a light beam between a light emitting element group and a light receiving element group, detects a touch operation position from a cutoff state of the light beam, and performs switch input is disclosed in Japanese Unexamined Patent Publication No. Hei. There was one disclosed in JP-A-123626. In this conventional optical touch switch device, a signal line is individually connected from an output circuit to each light emitting element constituting the light emitting element group, thereby driving each of the light emitting elements one by one. Each light emitting element emitted a scanning light beam. Similarly, a signal line is individually connected from the input circuit to each light receiving element constituting the light receiving element group.
【０００３】[0003]
【発明が解決しようとする課題】上記のごとく、従来の
光タッチスイッチ装置では、発光素子群と出力回路とを
結ぶ信号線の数、及び受光素子群と入力回路とを結ぶ信
号線の数が各素子の数だけ必要であり、全体として多数
の信号線が必要で有るため回路が煩雑に成り、設計の自
由度が低下すると共に、信頼性が低下するとか、価格が
上昇する原因に成っていた。As described above, in the conventional optical touch switch device, the number of signal lines connecting the light emitting element group and the output circuit and the number of signal lines connecting the light receiving element group and the input circuit are reduced. As many as signal lines are required as a whole, a large number of signal lines are required as a whole, which complicates the circuit, lowers the degree of freedom in design, lowers reliability, and increases prices. Was.
【０００４】この発明は、上記した課題を解決するもの
であり、発光素子群及び受光素子群に接続する信号線の
数を少なくして光タッチスイッチ装置の回路を簡素化す
ることを目的としたものである。An object of the present invention is to solve the above-mentioned problems and to simplify the circuit of an optical touch switch device by reducing the number of signal lines connected to a light emitting element group and a light receiving element group. Things.
【０００５】[0005]
【課題を解決するための手段】上記課題を達成するため
に、まず請求項１記載の発明は、タッチ操作面の周囲に
配置した発光素子群と受光素子群との間で光線を走査さ
せ、該光線の遮断状態からタッチ操作位置を検出してス
イッチ入力を行う光タッチスイッチ装置において、ＯＮ
時間がＴ１である第１パルスを順々に繰り返し発生する
第１パルス発生回路と、ＯＮ時間がＴ１／Ｎ（但しＮ＝
自然数）である第２パルスを前記第１パルスに同期して
発生する第２パルス発生回路とを備え、第１パルス発生
回路及び第２パルス発生回路が発生する第１、第２パル
スの組み合わせによって前記発光素子群及び受光素子群
を駆動するように構成した光タッチスイッチ装置を提供
する。In order to achieve the above object, according to the first aspect of the present invention, a light beam is scanned between a light emitting element group and a light receiving element group arranged around a touch operation surface, In an optical touch switch device that detects a touch operation position from the light blocking state and performs switch input,
A first pulse generating circuit for sequentially and repeatedly generating first pulses having a time T1, and an ON time T1 / N (where N =
A second pulse that is a natural number) and generates a second pulse in synchronization with the first pulse. The second pulse is generated by a combination of the first and second pulses generated by the first pulse generation circuit and the second pulse generation circuit. Provided is an optical touch switch device configured to drive the light emitting element group and the light receiving element group.
【０００６】また、請求項２記載の発明は、前記発光素
子群を構成する各発光素子を複数のグループに分けると
共に、各グループ毎に発光素子の一端を共通接続して該
各共通接続部分に順々に前記第１パルス発生回路から第
１パルスを与え、かつ発光素子の各他端に順々に前記第
２パルス発生回路から第２パルスを与えるようにした光
タッチスイッチ装置を提供する。According to a second aspect of the present invention, each of the light-emitting elements constituting the light-emitting element group is divided into a plurality of groups, and one end of the light-emitting element is commonly connected to each of the groups to connect to each of the common connection parts. Provided is an optical touch switch device in which a first pulse is sequentially applied from the first pulse generation circuit and a second pulse is sequentially applied to each other end of the light emitting element from the second pulse generation circuit.
【０００７】また、請求項３記載の発明は、前記受光素
子群を構成する各受光素子を複数のグループに分けると
共に、受光素子の一端を各グループ毎に共通接続して該
各共通接続部分に順々に前記第２パルス発生回路から第
２パルスを与え、かつ受光素子の他端の全てを出力部に
共通接続した光タッチスイッチ装置を提供する。According to a third aspect of the present invention, each of the light-receiving elements constituting the light-receiving element group is divided into a plurality of groups, and one end of the light-receiving element is commonly connected to each of the groups to be connected to each of the common connection parts. Provided is an optical touch switch device in which a second pulse is sequentially applied from the second pulse generation circuit and all the other ends of the light receiving elements are commonly connected to an output unit.
【０００８】[0008]
【発明の実施の形態】この発明の実施形態を、添付図面
に基づき説明する。図面中の１はタッチ操作面であり、
該タッチ操作面１の後方にはカーナビゲーション、オー
ディオ、エアコン等の各種の情報を表示するディスプレ
イ（図示せず）を設置すると共に、該タッチ操作面１の
周囲に発光素子群２と受光素子群３とを配置している。
そして、タッチ操作面１において発光素子群２と受光素
子群３との間で光線を走査させ、該光線の遮断状態から
タッチ操作位置を検出してスイッチ入力を行うようにし
ている。Embodiments of the present invention will be described with reference to the accompanying drawings. 1 in the drawing is a touch operation surface,
A display (not shown) for displaying various information such as car navigation, audio, and air conditioner is installed behind the touch operation surface 1, and a light emitting element group 2 and a light receiving element group around the touch operation surface 1. 3 are arranged.
Then, a light beam is scanned between the light emitting element group 2 and the light receiving element group 3 on the touch operation surface 1, and a touch operation position is detected from the light blocking state to perform a switch input.
【０００９】次に発光素子群２を説明する。該発光素子
群２は、赤外線発光ダイオードを用いた例えば１５個の
発光素子２０１〜２１５によって構成したものであり、
各発光素子２０１〜２１５を複数のグループに分けると
共に、各グループ毎に発光素子２０１〜２１５の一端で
あるカソードを例えば図中に記号Ｌ７で示すごとく共通
接続して該各共通接続部分に順々に後述する第１パルス
発生回路４から第１パルスを与え、かつ発光素子２０１
〜２１５の他端である各アノードに順々に後述する第２
スイッチ素子群７を介して、又は直接に第２パルス発生
回路５から第２パルスを与えるようにしている。Next, the light emitting element group 2 will be described. The light emitting element group 2 includes, for example, 15 light emitting elements 201 to 215 using infrared light emitting diodes.
Each of the light emitting elements 201 to 215 is divided into a plurality of groups, and a cathode, which is one end of each of the light emitting elements 201 to 215, is commonly connected to each of the common connection portions, for example, as shown by a symbol L7 in the drawing. And a light emitting element 201
To each anode at the other end of the second to 215 in order
The second pulse is supplied from the second pulse generation circuit 5 via the switch element group 7 or directly.
【００１０】詳述すると、発光素子群２は、発光素子２
０１〜２０３のグループ、発光素子２０４〜２０６のグ
ループ、発光素子２０７〜２０９のグループ、発光素子
２１０〜２１２のグループ、発光素子２１３〜２１５の
グループの計５グループに分けている。そして、発光素
子２０１〜２０３は各カソードを共通接続して後述する
第１スイッチ素子群６のトランジスタ６０１のエミッタ
に接続し、同様に発光素子２０４〜２０６は各カソード
をトランジスタ６０２のエミッタに、発光素子２０７〜
２０９は各カソードをトランジスタ６０３のエミッタ
に、発光素子２１０〜２１２は各カソードをトランジス
タ６０４のエミッタに、発光素子２１３〜２１５は各カ
ソードをトランジスタ６０５のエミッタにそれぞれ接続
し、後述する第１パルス発生回路４の出力端ａ，ｂ，
ｃ，ｄ，ｅから順々に出力する第１パルスを各トランジ
スタ６０１〜６０５を介して与えるようにしている。More specifically, the light emitting element group 2 includes the light emitting element 2
There are a total of five groups: a group of 01 to 203, a group of light emitting elements 204 to 206, a group of light emitting elements 207 to 209, a group of light emitting elements 210 to 212, and a group of light emitting elements 213 to 215. The light emitting elements 201 to 203 have their respective cathodes connected in common and connected to the emitter of a transistor 601 of a first switch element group 6 described later. Similarly, the light emitting elements 204 to 206 have their respective cathodes connected to the emitter of the transistor 602 and emit light. Element 207 ~
Reference numeral 209 denotes a cathode connected to the emitter of the transistor 603, light emitting elements 210 to 212 connect the cathodes to the emitter of the transistor 604, and light emitting elements 213 to 215 connect the cathodes to the emitter of the transistor 605, respectively. The output terminals a, b,
A first pulse sequentially output from c, d, and e is applied through each of the transistors 601 to 605.
【００１１】更に、発光素子２０１，２０４，２０７，
２１０，２１３は各アノードを信号線Ｌ１を介して後述
する第２スイッチ素子群７のトランジスタ７０１のコレ
クタに接続し、同様に発光素子２０２，２０５，２０
８，２１１，２１４は各アノードを信号線Ｌ２を介して
トランジスタ７０２のコレクタに、発光素子２０３，２
０６，２０９，２１２，２１５は各アノードを信号線Ｌ
３を介してトランジスタ７０３のコレクタにそれぞれ接
続し、後述する第２パルス発生回路５の出力端ｆ，ｇ，
ｈから順々に出力する第２パルスを各トランジスタ７０
１〜７０３を介して与えるようにしている。Further, the light emitting elements 201, 204, 207,
Reference numerals 210 and 213 connect the respective anodes to the collector of the transistor 701 of the second switch element group 7 described later via the signal line L1.
8, 211 and 214 have the respective anodes connected to the collector of the transistor 702 via the signal line L2 and the light emitting elements 203 and 2 respectively.
06, 209, 212, and 215 connect each anode to the signal line L.
3 and connected to the collectors of the transistors 703, respectively.
h are sequentially output from each transistor 70
1 to 703.
【００１２】次に受光素子群３を説明する。該受光素子
群３は、フォトトランジスタを用いた例えば１５個の受
光素子３１０〜３１５によって構成したものであり、各
受光素子３０１〜３１５を複数のグループに分けると共
に、各グループ毎に受光素子３０１〜３１５の一端であ
るエミッタを共通接続して該各共通接続部分に順々に第
２パルス発生回路５から第２パルスを与え、かつ受光素
子３０１〜３１５の他端である各コレクタの全てを出力
部８に共通接続している。Next, the light receiving element group 3 will be described. The light receiving element group 3 is composed of, for example, 15 light receiving elements 310 to 315 using phototransistors. Each of the light receiving elements 301 to 315 is divided into a plurality of groups. An emitter at one end of the light receiving element 315 is commonly connected, a second pulse is sequentially applied from the second pulse generation circuit 5 to each common connection part, and all the collectors at the other ends of the light receiving elements 301 to 315 are output. Commonly connected to section 8.
【００１３】詳述すると、受光素子３０１，３０４，３
０７，３１０，３１３は各エミッタを信号線Ｌ４を介し
て後述する第２スイッチ素子群７のトランジスタ７０１
のベース及び第２パルス発生回路５の出力端ｆに接続
し、同様に発光素子３０２，３０５，３０８，３１１，
３１４の各エミッタを信号線Ｌ５を介してトランジスタ
７０２のベース及び第２パルス発生回路５の出力端ｇ
に、発光素子３０３，３０６，３０９，３１２，３１５
の各エミッタを信号線Ｌ６を介してトランジスタ７０３
のベース及び第２パルス発生回路５の出力端ｈにそれぞ
れ接続し、第２パルス発生回路５の出力端ｆ，ｇ，ｈか
ら順々に出力する第２パルスを与えるようにしている。More specifically, the light receiving elements 301, 304, 3
Reference numerals 07, 310, and 313 denote transistors 701 of a second switch element group 7, which will be described later, via signal lines L4.
And the light-emitting elements 302, 305, 308, 311,
314 are connected to the base of the transistor 702 and the output terminal g of the second pulse generation circuit 5 through the signal line L5.
The light emitting elements 303, 306, 309, 312, 315
Are connected to the transistor 703 via the signal line L6.
, And the output terminal h of the second pulse generation circuit 5 to supply a second pulse sequentially output from the output terminals f, g, h of the second pulse generation circuit 5.
【００１４】次に第１パルス発生回路４及び第２パルス
発生回路５を説明する。まず第１パルス発生回路４は、
ＯＮ時間が例えばＴ１≒６［ｍＳＥＣ］である第１パル
スを順々に繰り返し発生する回路であり、シフトレジス
タによって構成している。また第２パルス発生回路５
は、ＯＮ時間がＴ１／３≒２［ｍＳＥＣ］である第２パ
ルスを前記第１パルスに同期して発生する回路であり、
シフトレジスタによって構成している。そして、第１パ
ルス発生回路４及び第２パルス発生回路５にはマイコン
からなる同期制御回路９を接続しており、前記第１パル
スと第２パルスとの同期を制御している。尚、第１パル
ス発生回路４、第２パルス発生回路５及び同期制御回路
９は、マイコンのよって一体化できることは言うまでも
ない。また、発光素子２０１〜２１５及び受光素子３０
１〜３１５の少なくとも一方側の前面にスリットを設
け、該スリットによって光線の指向性を鋭くしている。
そのため、例えば発光素子２０１から発した光線は対向
した受光素子３０１でのみ受光されることとなる。Next, the first pulse generation circuit 4 and the second pulse generation circuit 5 will be described. First, the first pulse generation circuit 4
This is a circuit that repeatedly and sequentially generates the first pulse whose ON time is, for example, T1 ［6 [mSEC], and is configured by a shift register. The second pulse generation circuit 5
Is a circuit that generates a second pulse whose ON time is T1 / 3 ≒ 2 [mSEC] in synchronization with the first pulse,
It consists of a shift register. A synchronization control circuit 9 comprising a microcomputer is connected to the first pulse generation circuit 4 and the second pulse generation circuit 5, and controls the synchronization between the first pulse and the second pulse. It is needless to say that the first pulse generation circuit 4, the second pulse generation circuit 5, and the synchronization control circuit 9 can be integrated by a microcomputer. Also, the light emitting elements 201 to 215 and the light receiving element 30
A slit is provided in at least one of the front surfaces of the light-emitting devices 1 to 315, and the directivity of the light beam is sharpened by the slit.
Therefore, for example, a light beam emitted from the light emitting element 201 is received only by the opposing light receiving element 301.
【００１５】次に第１スイッチ素子群６及び第２スイッ
チ素子群７を説明する。まず第１スイッチ素子群６は、
第１パルス発生回路４が出力する第１パルスを各発光素
子２０１〜２１５の一端（カソード）に与える回路であ
り、トランジスタ６０１〜６０５の各エミッタを前記し
たように発光素子２０１〜２１５の各カソードに接続す
ると共に、各ベースを抵抗６０６〜６１０を介して第１
パルス発生回路４の各出力端ａ〜ｅに接続し、更に各コ
レクタを抵抗６１１を介して接地している。尚抵抗６１
１は、発光素子２０１〜２１５の通電電流を規制する保
護抵抗である。Next, the first switch element group 6 and the second switch element group 7 will be described. First, the first switch element group 6 includes:
This is a circuit for applying the first pulse output from the first pulse generation circuit 4 to one end (cathode) of each of the light emitting elements 201 to 215, and connecting each emitter of the transistors 601 to 605 to each cathode of the light emitting elements 201 to 215 as described above. And each base is connected to the first base via a resistor 606-610.
The output terminals a to e of the pulse generation circuit 4 are connected to each other, and each collector is grounded via a resistor 611. The resistance 61
Reference numeral 1 denotes a protection resistor that regulates a current flowing through the light emitting elements 201 to 215.
【００１６】また第１スイッチ素子群６は、第２パルス
発生回路５が出力する第２パルスを信号線Ｌ１，Ｌ２，
Ｌ３を介して各発光素子２０１〜２１５の他端（アノー
ド）に与える回路であり、トランジスタ７０１〜７０３
の各エミッタを電源回路１１に接続すると共に、各ベー
スを抵抗７０４〜７０６を介して第２パルス発生回路５
の各出力端ｆ〜ｈ及び各信号線Ｌ４〜Ｌ６に接続し、更
に各コレクタを各信号線Ｌ１〜Ｌ３に接続している。The first switch element group 6 supplies the second pulse output from the second pulse generation circuit 5 to the signal lines L1, L2,
This is a circuit provided to the other end (anode) of each of the light emitting elements 201 to 215 via L3.
Are connected to the power supply circuit 11, and each base is connected to the second pulse generation circuit 5 through resistors 704 to 706.
Are connected to the respective output terminals f to h and the respective signal lines L4 to L6, and the respective collectors are connected to the respective signal lines L1 to L3.
【００１７】また出力端８は、プルアップ抵抗１０を介
して電源回路１１に接続し、かつ、その後段に、受光素
子群３が出力する信号に基づいてタッチ操作面１上のタ
ッチ操作位置座標を判定するための判定部を接続してい
る。ちなみに、該判定部は前記した同期制御回路９を構
成するマイコンにプログラムした部分である。The output terminal 8 is connected to a power supply circuit 11 via a pull-up resistor 10 and, at a subsequent stage, a touch operation position coordinate on the touch operation surface 1 based on a signal output from the light receiving element group 3. Is connected to the determination unit. Incidentally, the determination section is a section programmed in the microcomputer constituting the synchronization control circuit 9 described above.
【００１８】次に、上記したものの作動を図４のタイム
チャートを用いて説明する。尚、図４の（ａ）〜（ｈ）
の各横軸は時間を示し、図４の（ａ）〜（ｈ）の縦線は
それぞれ図１に示す第１パルス発生回路４の出力端ａ〜
ｅで計測した電位、及び第２パルス発生回路５の出力端
ｆ〜ｈで計測した電位を示す。Next, the operation of the above will be described with reference to the time chart of FIG. In addition, (a)-(h) of FIG.
4 indicate time, and the vertical lines in (a) to (h) of FIG. 4 indicate output terminals a to a of the first pulse generation circuit 4 shown in FIG.
The potential measured at e and the potential measured at the output terminals f to h of the second pulse generation circuit 5 are shown.
【００１９】ここでは、代表して時間ｔ１〜ｔ４間にお
ける作動を説明する。第１パルス発生回路４は、時間ｔ
１〜ｔ４において出力端ａを“０”レベルにする。一
方、第２パルス発生回路５は、時間ｔ１〜ｔ２において
出力端ｆを“０”レベルにし、時間ｔ２〜ｔ３において
出力端ｇを“０”レベルにし、時間ｔ３〜ｔ４において
出力端ｈを“０”レベルにする。Here, the operation between times t1 and t4 will be described as a representative. The first pulse generation circuit 4 operates at time t
From 1 to t4, the output terminal a is set to the “0” level. On the other hand, the second pulse generation circuit 5 sets the output terminal f to the “0” level at times t1 to t2, sets the output terminal g to “0” level at times t2 to t3, and sets the output terminal h to “0” at times t3 to t4. Set to 0 ”level.
【００２０】これにより、時間ｔ１〜ｔ２では、図１に
太線で示す如く発光素子２０１の両端に電圧が印加され
て発光素子２０１が点灯し、かつ、同じく図１に太線で
示す如く受光素子３０１の両端に電圧が印加されるた
め、発光素子２０１から発した光線Ｂ１が図１に示す如
く受光素子３０１に到達すると、受光素子３０１がＯＮ
作動し、出力端８に“０”レベル信号が出力される。
尚、このとき受光素子３０４，３０７，３１０，３１３
の両端にも電圧が印加されるため、受光素子３０１と同
様に受光準備状態に成るが、発光素子２０１から発する
光線Ｂ１の指向性が鋭いため、該光線Ｂ１が受光素子３
０４，３０７，３１０，３１３に入射せず、誤作動はし
ない。As a result, at time t1 to t2, a voltage is applied to both ends of the light emitting element 201 as shown by the thick line in FIG. 1 to turn on the light emitting element 201, and the light receiving element 301 as shown by the thick line in FIG. Is applied, a light beam B1 emitted from the light emitting element 201 reaches the light receiving element 301 as shown in FIG.
It operates and outputs a “0” level signal to the output terminal 8.
At this time, the light receiving elements 304, 307, 310, 313
Are applied to both ends of the light-receiving element 301, the light-receiving element 301 is ready for receiving light, as in the case of the light-receiving element 301. However, since the directivity of the light ray B1 emitted from the light-emitting element 201 is sharp, the light ray B1
The light does not enter the light receiving elements 04, 307, 310, and 313 and does not malfunction.
【００２１】また、時間ｔ２〜ｔ３では、図２に太線で
示す如く発光素子２０２の両端に電圧が印加されて発光
素子２０２が点灯し、かつ、同じく図２に太線で示す如
く受光素子３０２の両端に電圧が印加されるため、発光
素子２０２から発した光線Ｂ２が図２に示す如く受光素
子３０２に到達すると、受光素子３０２がＯＮ作動し、
出力端８に“０”レベル信号が出力される。尚、このと
き受光素子３０５，３０８，３１１，３１４の両端にも
電圧が印加されて受光準備状態に成るが、前記理由によ
り誤作動はしない。At time t2 to t3, a voltage is applied to both ends of the light emitting element 202 as shown by the thick line in FIG. 2 to turn on the light emitting element 202, and the light receiving element 302 is also turned on as shown by the thick line in FIG. Since a voltage is applied to both ends, when the light beam B2 emitted from the light emitting element 202 reaches the light receiving element 302 as shown in FIG. 2, the light receiving element 302 is turned ON,
A “0” level signal is output to the output terminal 8. At this time, a voltage is also applied to both ends of the light receiving elements 305, 308, 311 and 314, and the light receiving elements are ready to receive light.
【００２２】更に、時間ｔ３〜ｔ４では、図３に太線で
示す如く発光素子２０３の両端に電圧が印加されて発光
素子２０３が点灯し、かつ、同じく図３に太線で示す如
く受光素子３０３の両端に電圧が印加されるため、発光
素子２０３から発した光線Ｂ３が図３に示す如く受光素
子３０３に到達すると、受光素子３０３がＯＮ作動し、
出力部８に“０”レベル信号が出力される。尚、このと
き受光素子３０６，２０９，３１２，３１５の両端にも
電圧が印加されて受光準備状態に成るが、前記理由によ
り誤作動はしない。Further, during the period from time t3 to time t4, a voltage is applied to both ends of the light emitting element 203 as shown by the thick line in FIG. 3 to turn on the light emitting element 203, and the light receiving element 303 is also turned on as shown by the thick line in FIG. Since a voltage is applied to both ends, when the light beam B3 emitted from the light emitting element 203 reaches the light receiving element 303 as shown in FIG. 3, the light receiving element 303 is turned ON,
The output unit 8 outputs a “0” level signal. At this time, a voltage is also applied to both ends of the light receiving elements 306, 209, 312, and 315 to be in a light receiving preparation state, but no malfunction occurs for the above-described reason.
【００２３】以下同様の作動により、時間ｔ４から時間
ｔ１６まで発光素子２０４〜２１５から順々に光線を発
するとともに、該光線を対向した受光素子３０４〜３１
０にて受光する。そして、以上説明した時間ｔ１〜ｔ１
６間における一連の作動を繰り返し実行する。これによ
り、タッチ操作面１上を光線が網目状に走査することと
なる。By the same operation, light is sequentially emitted from the light emitting elements 204 to 215 from time t4 to time t16, and the light is emitted from the light receiving elements 304 to 31 facing each other.
At 0, light is received. Then, the time t1 to t1 described above
A series of operations between 6 are repeatedly executed. Thus, the light beam scans the touch operation surface 1 in a mesh pattern.
【００２４】そして、タッチ操作面１に指を接触した際
に、発光素子２０１〜２１５と受光素子３０１〜３１５
の間の光線が指で遮断されると、該遮断された光線の発
生タイミングと同期して出力部８の電位が“１”レベル
となる。而して、出力部８に接続された判定部は、出力
部８の電位が“１”レベルと成ったタイミングからタッ
チ操作面１上のタッチ操作位置座標を割り出す。When the finger touches the touch operation surface 1, the light emitting elements 201 to 215 and the light receiving elements 301 to 315
Is blocked by the finger, the potential of the output unit 8 becomes "1" level in synchronization with the generation timing of the blocked light beam. Thus, the determination unit connected to the output unit 8 calculates the touch operation position coordinates on the touch operation surface 1 from the timing when the potential of the output unit 8 becomes the “1” level.
【００２５】[0025]
【発明の効果】この発明は、タッチ操作面の周囲に配置
した発光素子群と受光素子群との間で光線を走査させ、
該光線の遮断状態からタッチ操作位置を検出してスイッ
チ入力を行う光タッチスイッチ装置において、ＯＮ時間
がＴ１である第１パルスを順々に繰り返し発生する第１
パルス発生回路と、ＯＮ時間がＴ１／Ｎ（但しＮ＝自然
数）である第２パルスを前記第１パルスに同期して発生
する第２パルス発生回路とを備え、第１パルス発生回路
及び第２パルス発生回路が発生する第１、第２パルスの
組み合わせによって前記発光素子群及び受光素子群を駆
動するように構成したので、発光素子群及び受光素子群
に接続する信号線の数が少なくなり、光タッチスイッチ
装置の回路が簡素に成るため、設計の自由度が増し、か
つ信頼性が向上し、更に価格が廉価に成る。According to the present invention, a light beam is scanned between a light emitting element group and a light receiving element group arranged around a touch operation surface,
In an optical touch switch device that detects a touch operation position from the light blocking state and performs switch input, a first pulse in which an ON time is T1 is repeatedly generated in sequence.
A pulse generation circuit, and a second pulse generation circuit that generates a second pulse having an ON time of T1 / N (where N = a natural number) in synchronization with the first pulse. Since the light emitting element group and the light receiving element group are configured to be driven by a combination of the first and second pulses generated by the pulse generation circuit, the number of signal lines connected to the light emitting element group and the light receiving element group is reduced, Since the circuit of the optical touch switch device is simplified, the degree of freedom in design is increased, the reliability is improved, and the price is reduced.
【００２６】また、前記発光素子群を構成する各発光素
子を複数のグループに分けると共に、各グループ毎に発
光素子の一端を共通接続して該各共通接続部分に順々に
前記第１パルス発生回路から第１パルスを与え、かつ発
光素子の各他端に順々に前記第２パルス発生回路から第
２パルスを与えるようにしたので、発光素子群に接続す
る信号線の数が少なく成る。Each of the light-emitting elements constituting the light-emitting element group is divided into a plurality of groups, and one end of the light-emitting elements is commonly connected to each group, and the first pulse generation is sequentially performed at each of the common connection parts. Since the first pulse is supplied from the circuit and the second pulse is sequentially supplied from the second pulse generation circuit to each other end of the light emitting element, the number of signal lines connected to the light emitting element group is reduced.
【００２７】更に、前記受光素子群を構成する各受光素
子を複数のグループに分けると共に、受光素子の一端を
各グループ毎に共通接続して該各共通接続部分に順々に
前記第２パルス発生回路から第２パルスを与え、かつ受
光素子の他端の全てを出力部に共通接続したので、受光
素子群に接続する信号線の数が少なく成る。Further, each of the light-receiving elements constituting the light-receiving element group is divided into a plurality of groups, and one end of the light-receiving element is commonly connected to each group, and the second pulse generation is sequentially performed at each of the common connection parts. Since the second pulse is supplied from the circuit and all the other ends of the light receiving elements are commonly connected to the output section, the number of signal lines connected to the light receiving element group is reduced.
【図１】この発明の実施形態を示す電気的回路図であ
り、発光素子２０１が光線Ｂ１を発した状態を示す。FIG. 1 is an electric circuit diagram showing an embodiment of the present invention, and shows a state in which a light emitting element 201 emits a light beam B1.
【図２】この発明の実施形態を示す電気的回路図であ
り、発光素子２０２が光線Ｂ２を発した状態を示す。FIG. 2 is an electrical circuit diagram showing the embodiment of the present invention, and shows a state where a light emitting element 202 emits a light beam B2.
【図３】この発明の実施形態を示す電気的回路図であ
り、発光素子２０３が光線Ｂ３を発した状態を示す。FIG. 3 is an electric circuit diagram showing the embodiment of the present invention, and shows a state in which the light emitting element 203 emits a light beam B3.
【図４】図１〜図３に示すものの作動を説明するタイム
チャートであり、（ａ）は第１パルス発生回路の出力端
ａの電位、（ｂ）は第１パルス発生回路の出力端ｂの電
位、（ｃ）は第１パルス発生回路の出力端ｃの電位、
（ｄ）は第１パルス発生回路の出力端ｄの電位、（ｅ）
は第１パルス発生回路の出力端ｅの電位、（ｆ）は第２
パルス発生回路の出力端ｆの電位、（ｇ）は第２パルス
発生回路の出力端ｇの電位、（ｈ）は第２パルス発生回
路の出力端ｈの電位を示す。FIGS. 4A and 4B are time charts for explaining the operation of the apparatus shown in FIGS. 1 to 3, wherein FIG. 4A is the potential of the output terminal a of the first pulse generation circuit, and FIG. (C) is the potential of the output terminal c of the first pulse generation circuit,
(D) is the potential of the output terminal d of the first pulse generation circuit, (e)
Is the potential of the output terminal e of the first pulse generation circuit, and (f) is the second
The potential at the output terminal f of the pulse generation circuit, (g) indicates the potential at the output terminal g of the second pulse generation circuit, and (h) indicates the potential at the output terminal h of the second pulse generation circuit.
１ タッチ操作面 ２ 発光素子群 ３ 受光素子群 ４ 第１パルス発生回路 ５ 第２パルス発生回路 ６ 第１スイッチ素子群 ７ 第２スイッチ素子群 ８ 出力部 ９ 同期制御回路 DESCRIPTION OF SYMBOLS 1 Touch operation surface 2 Light emitting element group 3 Light receiving element group 4 1st pulse generation circuit 5 2nd pulse generation circuit 6 1st switch element group 7 2nd switch element group 8 Output part 9 Synchronization control circuit
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18693496AJPH1021008A (en) | 1996-06-28 | 1996-06-28 | Optical touch switch device |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18693496AJPH1021008A (en) | 1996-06-28 | 1996-06-28 | Optical touch switch device |
| Publication Number | Publication Date |
|---|---|
| JPH1021008Atrue JPH1021008A (en) | 1998-01-23 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18693496APendingJPH1021008A (en) | 1996-06-28 | 1996-06-28 | Optical touch switch device |
| Country | Link |
|---|---|
| JP (1) | JPH1021008A (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6141340A (en)* | 1997-05-06 | 2000-10-31 | At&T Corp | Method for multi-media transactions |
| KR100747533B1 (en) | 2005-01-10 | 2007-08-08 | 엘지전자 주식회사 | Input means control circuit of electronic products |
| JP2007259140A (en)* | 2006-03-23 | 2007-10-04 | Fujitsu Ltd | Wavelength division multiplexing transmission device and wavelength management program |
| JP2014211841A (en)* | 2013-04-22 | 2014-11-13 | アルパイン株式会社 | Optical touch panel device |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6141340A (en)* | 1997-05-06 | 2000-10-31 | At&T Corp | Method for multi-media transactions |
| KR100747533B1 (en) | 2005-01-10 | 2007-08-08 | 엘지전자 주식회사 | Input means control circuit of electronic products |
| JP2007259140A (en)* | 2006-03-23 | 2007-10-04 | Fujitsu Ltd | Wavelength division multiplexing transmission device and wavelength management program |
| JP2014211841A (en)* | 2013-04-22 | 2014-11-13 | アルパイン株式会社 | Optical touch panel device |
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