JP5832784B2 - Touch panel system and electronic device using the same - Google Patents

Touch panel system and electronic device using the same Download PDF

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JP5832784B2
JP5832784B2 JP2011119774A JP2011119774A JP5832784B2 JP 5832784 B2 JP5832784 B2 JP 5832784B2 JP 2011119774 A JP2011119774 A JP 2011119774A JP 2011119774 A JP2011119774 A JP 2011119774A JP 5832784 B2 JP5832784 B2 JP 5832784B2
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touch panel
sensitivity
touch operation
touch
operation
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JP2012248035A (en
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湯元 学
学 湯元
宮本 雅之
雅之 宮本
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シャープ株式会社
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Description

  The present invention relates to a touch panel system, and more particularly to a highly sensitive touch panel system capable of performing a touch operation even when a human finger or the like approaches without touching it, and an electronic apparatus using the touch panel system.

  Currently, touch panel systems are rapidly being installed in various electronic devices such as portable information devices such as smartphones and vending machines such as vending machines. In the touch panel, a method such as a resistive film method is widely used, but a projection capacitive method capable of detecting when a plurality of fingertips are input is also spreading.

  In the case of a resistive film type touch panel, for example, a 4-wire resistive film type touch panel, two resistive films with electrodes in the front-rear direction and the left-right direction are configured to face each other vertically. A gap is provided between the upper and lower resistance films using a separator so that the resistance films do not contact each other in a normal state. When the finger touches the touch panel, the upper and lower resistive films come into contact with each other as shown in FIG. 6, and the voltage at that position is measured via the opposite resistive film to obtain the contact position. Can do. That is, for the resistive film method, in order to perform a touch operation, contact with the touch panel is essential.

  On the other hand, in the projected capacitive touch panel, when the touch panel is viewed from above, the shape and arrangement of the electrodes are basically such that square electrodes are continuously arranged in a matrix. FIG. 7 shows the shape of a conventional electrode of the projected capacitance type. FIG. 8 is a diagram showing the shape and arrangement of the first electrode and the second electrode. As shown in FIG. 8, it can be seen that the first electrode and the second electrode have the same shape, and a large number of diamond-shaped electrodes are continuously arranged.

  Such a projected capacitive touch panel captures changes in capacitance between electrodes, and when a finger or the like approaches an electrode running vertically and horizontally, the capacitance between the finger and the electrode increases. Change. Then, by examining which of the vertical and horizontal lines the capacitance change is large, it can be seen which intersection point is approached (see FIG. 9).

  In such a projected capacitive system, a touch operation can be detected by a touch panel system with high sensitivity even by simply approaching without touching a human finger or the like.

  However, as described above, in a system that allows high-sensitivity touch operations without touching human fingers, etc., even when the touch operation is not consciously performed, the touch of the finger on the touch panel There is a risk that it will be considered as an operation.

  In Patent Document 1, as shown in FIG. 10, in addition to the contact sensor (first contact sensor) composed of SW1 and SW2, a dummy sensor (second contact sensor) composed of SW3 is installed close to the contact sensor. And the touch panel which detects the contact at the time of incorrect operation by the contact which is not intended by the dummy sensor is disclosed.

JP 2009-111996 A (published May 21, 2009)

  As described above, in the contact sensor according to Patent Document 1, the contact at the time of an erroneous operation due to an unintended contact can be detected by a dummy sensor (second contact sensor). However, in the case of a touch panel system in which a touch operation can be performed by approaching without touching a human finger or the like as in the above-described projected capacitive method, it is not intended even if the dummy sensor is not touched. A touch operation is detected.

  An object of the present invention relates to a high-sensitivity touch panel system that can be touch-operated even by approaching without touching a human finger or the like, and capable of preventing erroneous operation due to unintended approach of a human finger or the like Is to provide.

In order to solve the above problems, a touch panel system of the present invention includes a projected capacitive touch panel and a touch panel that receives a signal from the touch panel and detects a touch operation by a user based on the received signal. The touch panel controller has touch operation sensitivity changing means for changing the sensitivity of the touch operation detected on the touch panel, and the touch panel controller integrates the received signals from the touch panel a plurality of times. The touch operation sensitivity changing means detects the touch operation by comparing the integrated signal value with a touch operation detection threshold, and the touch operation sensitivity changing means increases or decreases the number of times of reception integration of the received signal to thereby increase the touch operation. It is characterized by changing the sensitivity of operation .

  According to the above configuration, the touch panel controller includes the touch operation sensitivity changing unit that changes the sensitivity of the touch operation. It is possible to prevent the operation from being performed as a touch operation when, for example, the user approaches the touch panel. Conversely, by making a change that improves the sensitivity of the touch operation, it is possible to perform a touch operation while wearing a glove or a non-contact touch operation.

  Further, in the touch panel system, the touch panel controller integrates a plurality of received signals from the touch panel, and detects a touch operation by comparing the accumulated signal value with a touch operation detection threshold. The touch operation sensitivity changing means may be configured to change the sensitivity of the touch operation by changing the number of times of reception integration of the received signal.

  According to said structure, the change which reduces the sensitivity of touch operation can be performed by reducing the said frequency | count of reception integration. Or the change which improves the sensitivity of touch operation can also be performed by increasing the said reception integration frequency.

  In the touch panel system, the transition to the touch operation sensitivity change instruction mode is performed by a button operation, or the transition to the touch operation sensitivity change instruction mode is performed by software. Can do.

  In the touch panel system, the sensitivity of the touch operation can be changed via a user interface.

  In the touch panel system, the change in sensitivity of the touch operation can be selected from a plurality of preset sensitivities.

  Further, in the touch panel system, a configuration in which the touch operation by glove wearing can be switched by changing the sensitivity of the touch operation, or a configuration in which the touch operation by non-contact can be switched can be switched. It can be.

  Moreover, in the said touch panel system, the electrode which comprises the sensor part of the said touch panel can be set as the structure which is a transparent electrode.

  In order to solve the above-described problems, an electronic apparatus according to the present invention includes any one of the touch panel systems described above.

  Moreover, in the said electronic device, the said touch panel can be set as the structure superimposed on the display screen of a display apparatus.

  In the electronic apparatus, the display device may be any one of a liquid crystal display, a plasma display, an organic EL display, and a field emission display.

In the touch panel system of the present invention, the touch operation sensitivity for receiving the signal from the touch panel and detecting the touch operation by the user based on the received signal changes the sensitivity of the touch operation detected on the touch panel. The touch panel controller detects a touch operation by integrating the received signal from the touch panel a plurality of times and comparing the integrated signal value with a touch operation detection threshold. The operation sensitivity changing means changes the sensitivity of the touch operation by increasing or decreasing the number of times of reception reception of the received signal . Therefore, by making a change that lowers the sensitivity of the touch operation, it is possible to prevent the operation as a touch operation when a human finger or the like approaches the touch panel unintentionally. Conversely, by making a change that improves the sensitivity of the touch operation, it is possible to perform a touch operation while wearing a glove or a non-contact touch operation.

It is a figure which shows the basic composition of the touchscreen system by this invention. It is a figure which shows the output signal waveform from the touchscreen by this invention. It is a flowchart which shows the touch operation sensitivity change process of the touchscreen system by this invention. It is a figure which shows the user interface display for performing the touch operation sensitivity change process in the touchscreen system by this invention. It is a figure which shows the other example of the user interface display for performing the touch operation sensitivity change process in the touchscreen system by this invention. It is a figure which shows the structure of a resistive film type touch panel. It is a figure which shows the shape and arrangement | positioning of the 1st electrode and 2nd electrode of a projection type capacitive touch panel. 2 shows the shape of a conventional electrode of a projected capacitive touch panel. It is a figure which shows the structure of a projection type capacitive touch panel. It is a figure which shows the conventional touch panel which can detect the contact at the time of incorrect operation.

  Embodiments of a touch panel system of the present invention will be described below with reference to the drawings. The touch panel system of the present embodiment employs a projected capacitive system. FIG. 1 is a diagram showing a basic configuration of a touch panel system 1 according to the present embodiment.

  As shown in FIG. 1, the touch panel system 1 includes a touch panel 10 and a touch panel controller 20. The touch panel 10 includes a sensor 11 that inputs a signal when a user performs a touch operation. The touch panel controller 20 receives an input terminal that receives a signal from the sensor 11, a coordinate detection unit 21 that outputs a coordinate value based on the signal input to the input terminal, and coordinate information from the coordinate detection unit 21 at regular intervals. And the CPU 22 for outputting to the display device and the like. The coordinate detection means 21 has touch operation sensitivity changing means 23 for changing the sensitivity of the touch operation.

  Note that the sensor 11 arranged in the touch panel system 1 in the present embodiment is a capacitive sensor, and when the user touches the touch panel 10, the electrodes constituting the sensor 11 are shown in FIG. A change in the capacitance value between the drive line and the sense line shown is detected.

  The touch panel 10 is composed of M drive lines and L sense lines, and forms a capacitive sensor 11 at the intersection. In the coordinate detection operation of the touch operation, the change of the capacitance value of the sensor due to the touch operation is read by the sense line while scanning the drive line, thereby detecting the coordinates of the place where the touch operation is performed. At this time, considering the case where the detected change value of the capacitance value is small, the reading operation is performed a plurality of times, and the signal value is obtained by integrating the received signal from the touch panel a plurality of times corresponding to the plurality of reading operations. An increase operation is being performed.

  FIG. 2 shows a situation where this reading operation is performed a plurality of times. FIG. 2A shows a case where the reading operation is performed eight times, and FIG. 2B shows a case where the reading operation is performed three times. In FIG. 2A, the signal integrated value resulting from the eight reading operations exceeds the touch operation detection threshold. Thus, the detection of the touch operation is determined that the user has performed the touch operation when the signal value exceeds the touch operation detection threshold.

  However, as described above, this determination is not intended for a projected capacitive touch panel system as long as it is a touch panel system with high sensitivity even when a finger or the like approaches without touching it. Touch operation may be detected. In order to solve this problem, it is conceivable to change the sensitivity of the touch operation.

  FIG. 3 is a flowchart showing touch operation sensitivity changing processing of the touch panel system according to the present invention.

  When the user gives an instruction to change the touch operation sensitivity (F201), the method for shifting to the change instruction mode is that the user operates the touch operation sensitivity change processing button to change the touch operation sensitivity from the display page when the touch panel system is started. It is conceivable to start an application for the user or to start the application at a desired timing (for example, when the touch panel system is started) by touch operation sensitivity change display software. In any of the activation methods, a user interface display as shown in FIG. 4 is displayed.

  FIG. 4 shows a display example of a user interface for performing touch operation sensitivity changing processing in the touch panel system. In this user interface display, a display for prompting the operator to adjust the sensitivity of the touch operation (such as “Please adjust the sensitivity of the touch operation”) is displayed, and the sensitivity is adjusted at the bottom. The slider is installed. If the touch operation is unintentionally detected, the operator moves the slider in the direction of decreasing the sensitivity to decrease the sensitivity, and performs sensitivity adjustment input (F202). This sensitivity adjustment input value is stored in the touch operation sensitivity changing means 23 of the touch panel controller 20 (F203).

  Reflecting this sensitivity adjustment input, the touch operation sensitivity changing means 23 in the coordinate detecting means 21 changes the number of touch panel readings (the number of times of reception integration). In the present embodiment, the number of readings on the touch panel can be reduced by moving the slider in the direction of decreasing the sensitivity.

  For example, in order to reduce the sensitivity of the touch panel system, consider the case where the number of touch panel readings is reduced from 8 times shown in FIG. 2A to 3 times shown in FIG. When the number of readings is reduced to 3 in this way, the integrated signal value does not exceed the touch operation detection threshold value, and the touch panel system 1 determines that the user is not performing a touch operation on the touch panel. That is, even in a highly sensitive touch panel system, the risk of unintended touch operations being detected can be eliminated by reducing the number of times the touch panel is read and reducing the sensitivity of the touch panel system. Of course, as described above, even when the number of touch panel readings is reduced, a clear touch operation by finger or pen input can be detected.

  Moreover, in this touch panel system, the power consumption of the system can be reduced as an effect produced as a result of this sensitivity reduction. For example, assuming that the number of times the touch panel is read at the initial sensitivity is eight, if the number of times of reading is reduced to three, the power consumption for touch panel reading is reduced compared to the initial sensitivity.

  In the above description, the processing for reducing the sensitivity has been described in order to prevent malfunction due to unintended touch operation detection. However, in the touch panel system, on the contrary, the touch panel reading count is increased to further increase the sensitivity. It is also possible to improve. For example, if this touch panel system is adopted for an operation panel of a machine in a factory or the like, there may be a case where it is desired to increase sensitivity when it is desired to perform a touch operation while wearing gloves. In such a case, it is only necessary to increase the number of times the touch panel is read by moving the slider in the direction of increasing sensitivity on the user interface shown in FIG.

  Furthermore, when it is desired to perform a touch operation in a non-contact manner, the sensitivity can be further increased by moving the slider in a direction in which the sensitivity is further increased.

  That is, in this touch panel system, the user can select how much the touch operation is detected by changing the sensitivity of the touch operation. For example, if touch operation with fingers / pens is possible, but touch operations with gloves and non-contact are not possible, touch operations with fingers / pens and gloves are possible, but non-contact touch operations are not possible In such a case, the user can select a case where a touch operation by finger / pen, glove wearing, and non-contact is possible.

  As described above, it is assumed that there are a plurality of cases where it is desired to use the touch panel system with high sensitivity when it is desired to use it with low sensitivity. In order to easily switch the sensitivity corresponding to this, a user interface display for performing the touch operation sensitivity changing process shown in FIG. 5 can be cited. In this user interface display, a message “Please select your preferred touch operation sensitivity.” Is displayed to prompt the operator to select the sensitivity of the touch operation. Sensitivity A ”,“ sensitivity B ”, and“ initial setting ”buttons are provided. The operator can easily select the desired sensitivity by recording the desired sensitivity in the “sensitivity A” and “sensitivity B” buttons in advance.

  In the electronic device using the touch panel system of the present invention, the touch panel is generally used by being superimposed on the display screen of the display device. The display device includes a liquid crystal display, a plasma display, an organic EL display, an electric field, and the like. Any of an emission display (FED: Field Emission Display) or the like may be used. Moreover, it is preferable that the electrode which comprises the said touchscreen is a transparent electrode so that the said display screen can be visually recognized.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.

  The present invention can be used for a highly sensitive touch panel system that employs a projected capacitive method.

DESCRIPTION OF SYMBOLS 1 Touch panel system 10 Touch panel 20 Touch panel controller 23 Touch operation sensitivity change means

Claims (11)

  1. A projected capacitive touch panel;
    A touch panel controller that receives a signal from the touch panel and detects a touch operation by a user based on the received signal;
    The touch panel controller has touch operation sensitivity changing means for changing the sensitivity of the touch operation detected on the touch panel,
    The touch panel controller integrates a plurality of received signals from the touch panel, and detects a touch operation by comparing the accumulated signal value with a touch operation detection threshold.
    The touch operation sensitivity changing means changes the sensitivity of the touch operation by increasing or decreasing the number of times of reception reception of the reception signal .
  2. The touch panel system according to claim 1, wherein transition to the touch operation sensitivity change instruction mode is performed by a button operation.
  3. The touch panel system according to claim 1, wherein transition to the touch operation sensitivity change instruction mode is performed by software.
  4. The touch panel system according to any one of claims 1 to 3 , wherein the sensitivity of the touch operation is changed through a user interface.
  5. The touch panel system according to any one of claims 1 to 4 , wherein the change of the sensitivity of the touch operation can be selected from a plurality of preset sensitivities.
  6. The touch panel system according to any one of claims 1 to 5 , wherein the touch operation by glove wearing can be switched by changing the sensitivity of the touch operation.
  7. The touch panel system according to any one of claims 1 to 6 , wherein whether or not the touch operation can be performed without contact can be switched by changing the sensitivity of the touch operation.
  8. The touch panel system according to any one of claims 1 to 7 , wherein an electrode constituting the sensor of the touch panel is a transparent electrode.
  9. An electronic apparatus comprising the touch panel system according to any one of claims 1 to 8 .
  10. The electronic device according to claim 9 , wherein the touch panel is arranged so as to be superimposed on a display screen of a display device.
  11. The electronic device according to claim 10 , wherein the display device is any one of a liquid crystal display, a plasma display, an organic EL display, and a field emission display.
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