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JP2007027034A - Electrostatic capacity type touch switch - Google Patents

Electrostatic capacity type touch switch Download PDF

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Publication number
JP2007027034A
JP2007027034A JP2005211204A JP2005211204A JP2007027034A JP 2007027034 A JP2007027034 A JP 2007027034A JP 2005211204 A JP2005211204 A JP 2005211204A JP 2005211204 A JP2005211204 A JP 2005211204A JP 2007027034 A JP2007027034 A JP 2007027034A
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detection
sensitivity
touch switch
capacitive touch
circuit
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Tadao Kozu
忠夫 神頭
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Marelli Corp
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Calsonic Kansei Corp
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
    • H03K2217/9401—Calibration techniques
    • H03K2217/94026—Automatic threshold calibration; e.g. threshold automatically adapts to ambient conditions or follows variation of input

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Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrostatic capacity type touch switch which can detect a touching surely in case that a finger with a thick glove touches or in case that a finger without a glove touches. <P>SOLUTION: The electrostatic capacity type touch switch has a detection circuit 51 which detects electrostatic capacity change, a sensitivity setting circuit 52 which sets sensitivity of the detection circuit 51 or changes the sensitivity, and a detection determining circuit 54 which determines a detection of operation input. The sensitivity setting circuit 52 shifts detection sensitivity from high to low, and it shifts the detection sensitivity from low to high if the detection circuit 51 cannot confirm the detection when the detection sensitivity has been shifted from high to low. The detection determining circuit 54 determines the detection if again detected state of the detection circuit 51 continues when the detection sensitivity has been shifted from low to high. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、操作者が操作入力のために接触したことを静電容量の変化で検出してスイッチ入力となる静電容量式タッチスイッチの技術分野に属する。   The present invention belongs to the technical field of a capacitive touch switch that detects a contact of an operator for an operation input based on a change in capacitance and serves as a switch input.

従来では、発振回路に検出電極を接続し、物体の近接によって発振条件が変化するように構成し、発振回路へ供給する電圧を調整することで感度調整を行っている（例えば、特許文献１参照。）。
特開平１１−４００２１号公報（第２−４頁、全図） Conventionally, a detection electrode is connected to an oscillation circuit, the oscillation condition is changed depending on the proximity of an object, and sensitivity adjustment is performed by adjusting a voltage supplied to the oscillation circuit (for example, see Patent Document 1). .)
Japanese Patent Laid-Open No. 11-40021 (page 2-4, all figures)

しかしながら、従来にあっては、感度の設定は、出荷前の段階で行われ、以後変更することがないため、例えば、冬季に厚手の手袋をしたままタッチしても検出ができないという問題が生じる。また、単に検出感度を挙げることによって、これに対応しようとすると、手袋なしの指が触れる前に検出してしまう誤検出となってしまうという問題が生じる。   However, in the past, the sensitivity setting is performed at the stage before shipment and is not changed thereafter. For example, there is a problem that detection cannot be performed even if touching with thick gloves in winter. . In addition, simply increasing the detection sensitivity causes a problem of erroneous detection that is detected before a finger without a glove touches it.

本発明は、上記問題点に着目してなされたもので、その目的とするところは、厚手の手袋をしていても、手袋なしの指であっても、確実に検出することができる静電容量式タッチスイッチを提供することにある。   The present invention has been made paying attention to the above-mentioned problems, and the object of the present invention is to provide an electrostatic discharge that can be reliably detected even when wearing thick gloves or fingers without gloves. It is to provide a capacitive touch switch.

上記目的を達成するため、本発明では、静電容量の変化で操作入力を検出する静電容量式タッチスイッチにおいて、検出感度を高感度から低感度へ変化させながら操作入力を検出する、ことを特徴とする。   In order to achieve the above object, the present invention detects an operation input while changing the detection sensitivity from high sensitivity to low sensitivity in a capacitive touch switch that detects an operation input based on a change in capacitance. Features.

よって、本発明にあっては、厚手の手袋をしていても、手袋なしの指であっても、確実に検出することができる。   Therefore, in the present invention, it is possible to reliably detect a thick glove or a finger without a glove.

以下、本発明の静電容量式タッチスイッチを実現する実施の形態を、実施例１に基づいて説明する。   Hereinafter, an embodiment for realizing a capacitive touch switch of the present invention will be described based on Example 1. FIG.

まず、構成を説明する。
図１は実施例１の静電容量式タッチスイッチの概略構成を示す図である。図１における主要符号を説明する。 First, the configuration will be described.
FIG. 1 is a diagram illustrating a schematic configuration of a capacitive touch switch according to the first embodiment. The main symbols in FIG. 1 will be described.

実施例１の静電容量式タッチスイッチ１は、パネル２、検出電極３、電極用基板４、基板回路５（図１には図示せず）で構成される。
パネル２は、操作者によりタッチされる部分であり、色分けや文字印刷等により、その部分がタッチ操作される部分であることが見分けられるようになっている。材質例として樹脂を挙げておく。
検出電極３は、操作者の指が近づくことにより静電容量を変化させるための電極である。
電極用基板４は、検出電極３が固定され、かつ検出電極３に対する電気的接続を容易にする。 The capacitive touch switch 1 according to the first embodiment includes a panel 2, a detection electrode 3, an electrode substrate 4, and a substrate circuit 5 (not shown in FIG. 1).
The panel 2 is a part that is touched by an operator, and can be identified as a part that is touch-operated by color coding, character printing, or the like. Resin is mentioned as an example of a material.
The detection electrode 3 is an electrode for changing the capacitance when the operator's finger approaches.
The electrode substrate 4 fixes the detection electrode 3 and facilitates electrical connection to the detection electrode 3.

基板回路５は、検出電極３による静電容量の変化を処理して、検出結果を出力する。図２は、静電容量式タッチスイッチ１の基板回路５のブロック図である。
基板回路５は、検出回路５１、感度設定回路５２、温度センサ５３、検出判定回路５４を主な構成にしている。
検出回路５１は、検出電極３による静電容量の変化に対して、その変化を設定された感度で検出した結果が閾値を超えるかどうかによって、検知(ON状態)、非検知(OFF状態)の比較出力を行う。 The substrate circuit 5 processes the change in capacitance due to the detection electrode 3 and outputs a detection result. FIG. 2 is a block diagram of the substrate circuit 5 of the capacitive touch switch 1.
The substrate circuit 5 mainly includes a detection circuit 51, a sensitivity setting circuit 52, a temperature sensor 53, and a detection determination circuit 54.
The detection circuit 51 detects whether it is detected (ON state) or not detected (OFF state) depending on whether the result of detecting the change with the set sensitivity exceeds the threshold value with respect to the change in capacitance due to the detection electrode 3. Perform comparison output.

感度設定回路５２は、検出判定回路５４からの情報と設定された手順に従って、検出回路５１が静電容量の変化を検出する感度の変更を行う。
温度センサ５３は、検出エリアに近い部分の温度、もしくは、静電容量式タッチスイッチ１の環境温度を検出する。
検出判定回路５４は、内部又は外部にタイマを有し、検知出力、温度情報、時間情報、設定された感度変更手順の情報から、最終的な検出判定を行い、検出結果を外部に出力する。 The sensitivity setting circuit 52 changes the sensitivity with which the detection circuit 51 detects a change in capacitance according to the information from the detection determination circuit 54 and the set procedure.
The temperature sensor 53 detects the temperature near the detection area or the environmental temperature of the capacitive touch switch 1.
The detection determination circuit 54 has a timer inside or outside, performs final detection determination from detection output, temperature information, time information, and information on the set sensitivity change procedure, and outputs the detection result to the outside.

作用を説明する。
[検出処理]
図３に示すのは、静電容量式タッチスイッチ１の基板回路５で実行される操作入力検出処理の流れを示すフローチャート図で、以下、各ステップについて説明する。
ステップＳ１１では、検出感度を最大感度にする。 The operation will be described.
[Detection process]
FIG. 3 is a flowchart showing a flow of operation input detection processing executed by the substrate circuit 5 of the capacitive touch switch 1, and each step will be described below.
In step S11, the detection sensitivity is set to the maximum sensitivity.

ステップＳ１２では、検出感度最大で検知したかどうかを判断し、検知したならばステップＳ１３に進み、検知しなければステップＳ２４へ進む。   In step S12, it is determined whether or not detection is performed with the maximum detection sensitivity. If detected, the process proceeds to step S13, and if not detected, the process proceeds to step S24.

ステップＳ１３では、検出感度を１ステップ分、小さくする。この１ステップ分は最大感度から最小感度までを複数ステップ分に分けたものとする。   In step S13, the detection sensitivity is decreased by one step. In this one step, the maximum sensitivity to the minimum sensitivity are divided into a plurality of steps.

ステップＳ１４では、その検出感度において、検知したかどうかを判断し、検知したならばステップＳ１５へ進み、検知しないならばステップＳ１９へ進む。   In step S14, it is determined whether the detection sensitivity is detected. If detected, the process proceeds to step S15, and if not detected, the process proceeds to step S19.

ステップＳ１５では、検出感度が最小かどうかを判断し、最小であるならばステップＳ１６へ進み、最小でないならばステップＳ１３へ戻る。   In step S15, it is determined whether or not the detection sensitivity is minimum. If it is minimum, the process proceeds to step S16, and if not, the process returns to step S13.

ステップＳ１６では、最小感度において、検知したかどうかを判断し、検知したならばステップＳ１７へ進み、検知しないならばステップＳ１９へ進む。   In step S16, it is determined whether or not the minimum sensitivity is detected. If detected, the process proceeds to step S17, and if not detected, the process proceeds to step S19.

ステップＳ１７では、最小感度における検知から一定時間が経過したかどうかを判断し、一定時間経過したならばステップＳ１８へ進み、一定時間経過していないならばステップＳ１６へ戻る。   In step S17, it is determined whether or not a certain time has elapsed since detection at the minimum sensitivity. If the certain time has elapsed, the process proceeds to step S18, and if the certain time has not elapsed, the process returns to step S16.

ステップＳ１８では、検出結果をONにする出力を行う。   In step S18, an output for turning the detection result ON is performed.

ステップＳ１９では、検出感度を１ステップ分、大きくする。この１ステップ分は最大感度から最小感度までを複数ステップ分に分けたものとする。   In step S19, the detection sensitivity is increased by one step. In this one step, the maximum sensitivity to the minimum sensitivity are divided into a plurality of steps.

ステップＳ２０では、その検出感度において、検知したかどうかを判断し、検知したならばステップＳ２１へ進み、検知しなければステップＳ２３へ進む。   In step S20, it is determined whether the detection sensitivity is detected. If detected, the process proceeds to step S21. If not detected, the process proceeds to step S23.

ステップＳ２１では、検知から一定時間が経過したかどうかを判断し、一定時間経過したならばステップＳ２２へ進み、一定時間経過していないならばステップＳ２０へ戻る。   In step S21, it is determined whether or not a certain time has elapsed since the detection. If the certain time has elapsed, the process proceeds to step S22, and if the certain time has not elapsed, the process returns to step S20.

ステップＳ２２では、検出結果をONにする出力を行う。   In step S22, the detection result is turned on.

ステップＳ２３では、検出感度が最大かどうかを判断し、最大ならばステップＳ２４へ進み、最大でないならばステップＳ１９へ進む。   In step S23, it is determined whether or not the detection sensitivity is maximum. If it is maximum, the process proceeds to step S24, and if not, the process proceeds to step S19.

ステップＳ２４では、検出結果をOFFにする出力を行う。   In step S24, an output for turning off the detection result is performed.

[感度を可変にした検出作用]
実施例１の静電容量式タッチスイッチ１では、電源が投入されると、検出判定回路５４は、感度設定回路５２の感度を最大（高感度）にする（Ｓ１１）。この状態で、検出電極３へ人が近接していることを示す静電容量の変化が検知された場合には、検出判定回路５４は、感度設定回路５２の感度を段階的に下げていく（Ｓ１２→Ｓ１３）。 [Detection effect with variable sensitivity]
In the capacitive touch switch 1 according to the first embodiment, when the power is turned on, the detection determination circuit 54 maximizes the sensitivity of the sensitivity setting circuit 52 (S11). In this state, when a change in capacitance indicating that a person is approaching the detection electrode 3 is detected, the detection determination circuit 54 gradually decreases the sensitivity of the sensitivity setting circuit 52 ( S12 → S13).

感度を最小にしても検知されており、さらに、一定時間経過しても検知されている場合（Ｓ１４〜Ｓ１７）、操作入力を検出したと判定し、検出結果をONにする（Ｓ１８）。（図４参照）
この状態は、例えば、手袋等なく直接指をしっかりパネル２の検出エリアに接触させた状態である。このような場合には、確実に操作入力が検出される。 If the sensitivity is detected even when the sensitivity is minimized, and if it is detected even after a predetermined time has passed (S14 to S17), it is determined that an operation input has been detected, and the detection result is turned ON (S18). (See Figure 4)
This state is, for example, a state in which a finger is firmly in contact with the detection area of the panel 2 without a glove or the like. In such a case, the operation input is reliably detected.

次に、感度を下げていくと、検知がなくなる場合である。この場合には、検知がなくなった感度を段階的に挙げていくようにする（Ｓ１４→Ｓ１９）。これにより、再度検知がある場合には、一定時間経過により、操作入力を検出したと判定し、検出結果をONにする（Ｓ２０〜Ｓ２２）。（図５参照）
この状態は、例えば、手袋等で指が覆われた状態で、パネル２の検出エリアに指を接触させた状態である。このような場合にも、本実施例１の静電容量式タッチスイッチ１では、変化させた感度と時間により、確実に操作入力の検出を行う。
つまり、図９に示すように、単に初期設定として感度調整されたり、設計段階から感度が固定されたものに対して、このように感度を変更しつつ検出を行うことにより、確実な検出となる。 Next, when the sensitivity is lowered, detection is lost. In this case, the sensitivity at which detection is lost is listed step by step (S14 → S19). Thereby, when there exists a detection again, it determines with having detected the operation input by progress of fixed time, and turns ON a detection result (S20-S22). (See Figure 5)
This state is a state in which the finger is brought into contact with the detection area of the panel 2 with the finger covered with a glove or the like, for example. Even in such a case, the capacitive touch switch 1 according to the first embodiment reliably detects the operation input based on the changed sensitivity and time.
In other words, as shown in FIG. 9, by performing detection while changing the sensitivity as described above, the detection can be surely performed for the sensitivity that is simply adjusted as the initial setting or the sensitivity is fixed from the design stage. .

また、感度を下げていくと検知がなくなり、その状態から感度を段階的に上げても、再び検知がされない場合には、操作入力を検出しないと判定して検出結果をOFFにする（Ｓ２３→Ｓ２４）。
この状態は、例えば、操作位置なく指が検出エリアを横切るような場合であり、このような場合にも、本実施例１の静電容量式タッチスイッチ１では、最大感度から下げ、再度最大感度まで上げる感度の変化と時間により、手袋等で指が覆われた場合でも確実に操作入力を検出しつつ、非操作入力を確実に非検出と判定する。 Further, when the sensitivity is lowered, the detection disappears, and even if the sensitivity is gradually increased from the state, if the detection is not performed again, it is determined that the operation input is not detected, and the detection result is turned OFF (S23 → S24).
This state is, for example, a case where a finger crosses the detection area without an operation position. In such a case as well, the capacitive touch switch 1 of the first embodiment is lowered from the maximum sensitivity and again the maximum sensitivity. The non-operation input is determined to be reliably non-detected while reliably detecting the operation input even when the finger is covered with a glove or the like due to the change in sensitivity and time to be increased.

さらに、実施例１の静電容量式タッチスイッチ１では、温度センサ５３を設けている。図６に示すように、温度が高い、いわゆる常温の場合には、検出感度を低くする。また、温度に応じた感度とする。温度が常温に近づくにつれて、手袋等で指を覆っている可能性が低くなる。よって、この処理を行うことにより、処理の負担を減らす。
また、温度が高い場合であっても、手袋等で指を覆っている可能性も少ないがある。実施例１において、図３に示す電源投入時のステップＳ１１の最初に感度を最大にする処理を、図６に示す感度と温度の関係から、温度が常温の場合には、最大感度を低くして検出を開始するようにすれば、温度が高くても指を手袋等で覆っている場合が確実に検出され、かつ処理の負担を減らすことになる。 Furthermore, in the capacitive touch switch 1 of the first embodiment, a temperature sensor 53 is provided. As shown in FIG. 6, when the temperature is high, that is, at room temperature, the detection sensitivity is lowered. Moreover, it is set as the sensitivity according to temperature. As the temperature approaches room temperature, the possibility of covering the finger with a glove or the like decreases. Therefore, performing this process reduces the processing burden.
Even when the temperature is high, there is a low possibility that the finger is covered with gloves or the like. In the first embodiment, the processing for maximizing the sensitivity at the beginning of step S11 at the time of power-on shown in FIG. 3 is performed by reducing the maximum sensitivity when the temperature is normal temperature from the relationship between the sensitivity and the temperature shown in FIG. If the detection is started, the case where the finger is covered with a glove or the like is reliably detected even when the temperature is high, and the processing load is reduced.

このようにして、操作入力の検出が行なわれた後は、最大感度にして、次の検出に備えることで、繰り返し確実な入力検出を行う（図７参照）。
さらに、操作入力の検出が行われた場合、その検出した感度を次回、若しくは次回以降の検出感度として用いるようにすれば、処理回路の負担を減らしつつも、安定した検出が行える。このようにしてもよい（図８参照）。 After the operation input is detected in this way, the maximum sensitivity is set to prepare for the next detection, thereby repeatedly and reliably detecting the input (see FIG. 7).
Further, when an operation input is detected, if the detected sensitivity is used as the next or subsequent detection sensitivity, stable detection can be performed while reducing the load on the processing circuit. This may be done (see FIG. 8).

[車両への搭載について]
実施例１の静電容量式タッチスイッチ１は、上記説明のように素手の指であっても、手袋等で覆われた指であっても、確実な検出が成される。そのため、環境温度と車室内温度によって、手袋の着用があり、且つ操作入力の検出に非常に確実性が要求される車両への搭載に適している。車両において、操作入力に確実性を欠けば、使用者が車両を使いにくいと感じること、及び車両評価につながるからであり、確実性が高いこと、タッチスイッチの良好な入力感は、操作フィーリングを向上させ、車両評価の向上につながるのである。 [Onboard installation]
The capacitive touch switch 1 according to the first embodiment can reliably detect a bare finger or a finger covered with a glove as described above. Therefore, it is suitable for mounting on a vehicle in which gloves are worn depending on the environmental temperature and the passenger compartment temperature and the operation input is required to be highly reliable. This is because if the operation input in the vehicle lacks certainty, the user feels that it is difficult to use the vehicle, and this leads to vehicle evaluation. This leads to improved vehicle evaluation.

次に、効果を説明する。
実施例１の静電容量式タッチスイッチにあっては、下記に列挙する効果を得ることができる。 Next, the effect will be described.
In the capacitive touch switch of Example 1, the effects listed below can be obtained.

(1)静電容量の変化で操作入力を検出する静電容量式タッチスイッチ１において、感度設定回路５２により検出感度を高感度から低感度へ変化させながら操作入力を検出するため、厚手の手袋をしていても、手袋なしの指であっても、確実に検出することができる。   (1) In the capacitive touch switch 1 that detects an operation input by a change in capacitance, the sensitivity setting circuit 52 detects the operation input while changing the detection sensitivity from high sensitivity to low sensitivity. Whether it is a finger or a finger without gloves, it can be reliably detected.

(2)感度を変化させて検出した操作入力が継続されている場合に操作入力の検出と判定する検出判定回路５４を設けたため、厚手の手袋をしていても、手袋なしの指であっても、さらに確実に検出することができる。   (2) Since the detection determination circuit 54 is provided for determining that the operation input is detected when the operation input detected by changing the sensitivity is continued, even if the glove is wearing a thick glove, Can be detected more reliably.

(3)温度を検出する温度センサ５３と、温度に応じて感度を設定する感度設定回路５２とを備えたため、確実な検出をしつつ、処理負荷を軽減することができる。   (3) Since the temperature sensor 53 for detecting the temperature and the sensitivity setting circuit 52 for setting the sensitivity according to the temperature are provided, the processing load can be reduced while performing reliable detection.

(4)検出判定回路５４及び感度設定回路５２は、電源投入後に最初に検出した感度を維持するため、処理回路の負担を減らしつつも、安定した検出ができる。   (4) Since the detection determination circuit 54 and the sensitivity setting circuit 52 maintain the sensitivity first detected after the power is turned on, stable detection can be performed while reducing the load on the processing circuit.

(5)静電容量の変化を検出する検出回路５１と、検出回路５１の感度を設定及び変更を行なう感度設定回路５２と、操作入力の検出を判定する検出判定回路５４とを備え、感度設定回路５２は、検出感度を高感度から低感度へ変化させ、検出回路５１の検出が非検出になると、検出感度を低感度から高感度へ変化させ、検出判定回路５４は、検出感度を低感度から高感度へ変化させて再度検出された状態が継続すると、検出と判定するため、厚手の手袋をしていても、手袋なしの指であっても、確実に検出することができる。   (5) A detection circuit 51 for detecting a change in capacitance, a sensitivity setting circuit 52 for setting and changing the sensitivity of the detection circuit 51, and a detection determination circuit 54 for determining the detection of an operation input are provided. The circuit 52 changes the detection sensitivity from high sensitivity to low sensitivity, and when the detection of the detection circuit 51 becomes non-detection, the detection sensitivity is changed from low sensitivity to high sensitivity. The detection determination circuit 54 reduces the detection sensitivity to low sensitivity. When the state detected again after changing from high to high sensitivity is detected, it is determined to be detected, so that even a thick glove or a finger without a glove can be reliably detected.

以上、本発明の静電容量式タッチスイッチを実施例１に基づき説明してきたが、具体的な構成については、これらの実施例に限られるものではなく、特許請求の範囲の各請求項に係る発明の要旨を逸脱しない限り、設計の変更や追加等は許容される。   As described above, the capacitive touch switch of the present invention has been described based on the first embodiment. However, the specific configuration is not limited to these embodiments, and the respective claims of the claims are concerned. Design changes and additions are allowed without departing from the scope of the invention.

実施例１では、検出感度を段階的（ステップづつ）に下げる、又は上げるようにしたが、無段階で下げる又は上げるようにしてもよい。
検出回路５１、感度設定回路５２、検出判定回路５４は、１つの回路として構成されても、別体に構成されてもよいものとする。 In the first embodiment, the detection sensitivity is lowered or raised stepwise (step by step), but may be lowered or raised steplessly.
The detection circuit 51, the sensitivity setting circuit 52, and the detection determination circuit 54 may be configured as one circuit or separately.

本願の静電容量式タッチスイッチは、非常に確実性の高い操作入力の検出を行えるため、車両への搭載が特に適している。また、本願の静電容量式タッチスイッチは、近接センサや非接触センサへの適用が容易である。   Since the capacitive touch switch of the present application can detect a highly reliable operation input, it is particularly suitable to be mounted on a vehicle. In addition, the capacitive touch switch of the present application can be easily applied to proximity sensors and non-contact sensors.

実施例１の静電容量式タッチスイッチの概略構成を示す図である。1 is a diagram illustrating a schematic configuration of a capacitive touch switch of Example 1. FIG. 静電容量式タッチスイッチの基板回路のブロック図である。It is a block diagram of the board | substrate circuit of an electrostatic capacitance type touch switch. 静電容量式タッチスイッチの基板回路で実行される操作入力検出処理の流れを示すフローチャート図である。It is a flowchart figure which shows the flow of the operation input detection process performed with the board | substrate circuit of an electrostatic capacitance type touch switch. 実施例１における検出感度、検知状態、検出結果のタイムチャート図である。It is a time chart figure of detection sensitivity in Example 1, a detection state, and a detection result. 実施例１における検出感度、検知状態、検出結果のタイムチャート図である。It is a time chart figure of detection sensitivity in Example 1, a detection state, and a detection result. 実施例１における検出感度と温度の関係を示すグラフ図である。6 is a graph showing the relationship between detection sensitivity and temperature in Example 1. FIG. 実施例１における検出感度、検知状態、検出結果のタイムチャート図である。It is a time chart figure of detection sensitivity in Example 1, a detection state, and a detection result. 実施例１における検出感度、検知状態、検出結果のタイムチャート図である。It is a time chart figure of detection sensitivity in Example 1, a detection state, and a detection result. 静電容量式タッチスイッチの説明図である。It is explanatory drawing of an electrostatic capacitance type touch switch.

符号の説明Explanation of symbols

１ 静電容量式タッチスイッチ
２ パネル
３ 検出電極
４ 電極用基板
５ 基板回路
５１ 検出回路
５２ 感度設定回路
５３ 温度センサ
５４ 検出判定回路 DESCRIPTION OF SYMBOLS 1 Capacitive touch switch 2 Panel 3 Detection electrode 4 Electrode board 5 Substrate circuit 51 Detection circuit 52 Sensitivity setting circuit 53 Temperature sensor 54 Detection determination circuit

Claims (5)

静電容量の変化で操作入力を検出する静電容量式タッチスイッチにおいて、
検出感度を高感度から低感度へ変化させながら操作入力を検出する、
ことを特徴とする静電容量式タッチスイッチ。 In the capacitive touch switch that detects operation input by the change in capacitance,
Detects operation input while changing the detection sensitivity from high sensitivity to low sensitivity.
Capacitive touch switch characterized by that. 請求項１に記載の静電容量式タッチスイッチにおいて、
感度を変化させて検出した操作入力が継続されている場合に操作入力の検出と判定する検出判定手段を設けた、
ことを特徴とする静電容量式タッチスイッチ。 The capacitive touch switch according to claim 1,
Provided with a detection determination means for determining that the operation input is detected when the operation input detected by changing the sensitivity is continued;
Capacitive touch switch characterized by that. 請求項１又は請求項２に記載の静電容量式タッチスイッチにおいて、
温度を検出する温度検出手段と、
温度に応じて感度を設定する感度設定手段と、
を備えた、
ことを特徴とする静電容量式タッチスイッチ。 In the capacitive touch switch according to claim 1 or 2,
Temperature detecting means for detecting the temperature;
Sensitivity setting means for setting the sensitivity according to the temperature;
With
Capacitive touch switch characterized by that. 請求項１〜請求項３のいずれか１項に記載の静電容量式タッチスイッチにおいて、
電源投入後に最初に検出した感度を維持する感度維持手段を設けた、
ことを特徴とする静電容量式タッチスイッチ。 In the electrostatic capacitance type touch switch according to any one of claims 1 to 3,
Sensitivity maintenance means to maintain the sensitivity detected first after power-on is provided,
Capacitive touch switch characterized by that. 請求項１〜請求項４のいずれか１項に記載の静電容量式タッチスイッチにおいて、
静電容量の変化を検出する検出手段と、
前記検出手段の感度を設定及び変更を行なう感度設定手段と、
操作入力の検出を判定する検出判定手段と、
を備え、
前記感度設定手段は、検出感度を高感度から低感度へ変化させ、前記検出手段の検出が非検出になると、検出感度を低感度から高感度へ変化させ、
前記検出判定手段は、検出感度を低感度から高感度へ変化させて再度検出された状態が継続すると、検出と判定する、
ことを特徴とする静電容量式タッチスイッチ。 In the capacitive touch switch according to any one of claims 1 to 4,
Detecting means for detecting a change in capacitance;
Sensitivity setting means for setting and changing the sensitivity of the detection means;
Detection determination means for determining detection of an operation input;
With
The sensitivity setting means changes the detection sensitivity from high sensitivity to low sensitivity, and when the detection by the detection means becomes non-detection, changes the detection sensitivity from low sensitivity to high sensitivity,
The detection determination means determines detection when the detection sensitivity is changed from low sensitivity to high sensitivity and the state detected again continues.
Capacitive touch switch characterized by that.
JP2005211204A 2005-07-21 2005-07-21 Electrostatic capacity type touch switch Pending JP2007027034A (en)

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