WO2022172794A1 - 診断装置および診断方法 - Google Patents
診断装置および診断方法 Download PDFInfo
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- WO2022172794A1 WO2022172794A1 PCT/JP2022/003485 JP2022003485W WO2022172794A1 WO 2022172794 A1 WO2022172794 A1 WO 2022172794A1 JP 2022003485 W JP2022003485 W JP 2022003485W WO 2022172794 A1 WO2022172794 A1 WO 2022172794A1
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- capacitance
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- signal strength
- touch panel
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- 238000000034 method Methods 0.000 title claims description 19
- 238000003745 diagnosis Methods 0.000 title abstract description 11
- 230000005856 abnormality Effects 0.000 claims description 51
- 230000002159 abnormal effect Effects 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 14
- 238000002405 diagnostic procedure Methods 0.000 claims description 12
- 230000004048 modification Effects 0.000 description 15
- 238000012986 modification Methods 0.000 description 15
- 238000010586 diagram Methods 0.000 description 14
- 238000011109 contamination Methods 0.000 description 11
- 239000002184 metal Substances 0.000 description 2
- 230000005684 electric field Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000015654 memory Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- 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
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- 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
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
Definitions
- the present invention relates to a diagnostic device and diagnostic method for diagnosing a capacitive touch panel.
- an object of the present invention is to provide a diagnostic device and a diagnostic method that can finely grasp the state of a touch panel.
- a first aspect of the present invention is A diagnostic device for diagnosing a capacitive touch panel capable of detecting signals based on each of a self-capacitance method and a mutual capacitance method, a control unit for controlling the touch panel to perform the self-capacitance signal detection and the mutual-capacitance signal detection; A first signal intensity detected at each of the plurality of coordinates provided on the touch panel based on the self-capacitance formula, and a second signal intensity detected at each of the plurality of coordinates based on the mutual capacitance formula. and a signal strength acquisition unit that acquires a state determination unit that determines a state of the touch panel based on each of the first signal strength and each of the second signal strengths; Prepare.
- a second aspect of the present invention is A diagnostic method for diagnosing a capacitive touch panel capable of detecting a signal based on each of a self-capacitance method and a mutual-capacitance method, comprising: a control step of controlling the touch panel to perform the self-capacitance signal detection and the mutual-capacitance signal detection; A first signal intensity detected at each of a plurality of coordinates provided on the touch panel based on the self-capacitance formula, and a second signal intensity detected at each of the plurality of coordinates based on the mutual capacitance formula. a signal strength obtaining step of obtaining and a state determination step of determining a state of the touch panel based on each of the first signal strength and each of the second signal strengths; including.
- the state of the touch panel can be grasped in more detail than when only the first signal strength or the second signal strength is obtained.
- FIG. 1 is a block diagram showing the configuration of a display system.
- FIG. 2 is a block diagram showing the configuration of the state determination section.
- FIG. 3 is a diagram showing determination criteria of the state determination unit.
- FIG. 4 is a block diagram showing the configuration of the notification unit.
- FIG. 5 is a diagram showing a display example of the state of the touch panel.
- FIG. 6 is a flow chart showing the procedure of diagnostic processing when the diagnostic program is executed by the processor.
- FIG. 7 is a block diagram showing a configuration of a portion of the diagnostic device of Modification 1.
- FIG. 8 is a block diagram showing a configuration of part of a diagnostic device according to Modification 2.
- FIG. 1 is a block diagram showing the configuration of a display system.
- FIG. 2 is a block diagram showing the configuration of the state determination section.
- FIG. 3 is a diagram showing determination criteria of the state determination unit.
- FIG. 4 is a block diagram showing the configuration of the notification unit.
- FIG. 5 is a
- FIG. 1 is a block diagram showing the configuration of the display system 10. As shown in FIG.
- the display system 10 includes a display unit 12 , a touch panel 14 , a touch panel controller 16 and a diagnostic device 18 .
- the display unit 12 is a liquid crystal display or the like.
- the display unit 12 displays icons for inputting commands to the diagnostic device 18, information sent from the diagnostic device 18, and the like.
- the touch panel 14 is a capacitive touch panel.
- the touch panel 14 is formed in a transparent film shape and provided on the screen of the display unit 12 .
- the touch panel 14 has a self-capacitance mechanism 14A and a mutual capacitance mechanism 14B.
- the self-capacitance mechanism 14A is a mechanism that identifies the operating position based on the principle of detecting the capacitance between a single electrode and the human body.
- the self-capacitance mechanism 14A detects a first signal strength at each of a plurality of coordinates provided on the touch panel 14, and identifies an operation position based on the detected first signal strength.
- the processing of this self-capacitance mechanism 14A can be arbitrarily selected from known ones. Therefore, the details of the description here are omitted.
- the mutual capacitance mechanism 14B is a mechanism that identifies the operating position based on the principle of detecting changes in the electric field between the transmitting electrode and the receiving electrode.
- the mutual capacitance mechanism 14B detects the second signal strength at each of the plurality of coordinates provided on the touch panel 14, and identifies the operation position based on the detected second signal strength.
- the processing of this mutual capacitance type mechanism 14B can be arbitrarily selected from known ones. Therefore, the details of the description here are omitted.
- the plurality of coordinates provided on the touch panel 14 indicate the positions of the touch panel 14 .
- a plurality of coordinates provided on the touch panel 14 are specified by a combination of rows of X-axis electrodes arranged in the X-axis direction of the touch panel 14 and rows of Y-axis electrodes arranged in the Y-axis direction of the touch panel 14 .
- the coordinates are [1, 1] to [m , n].
- the multiple coordinates detected by the self-capacitance mechanism 14A and the multiple coordinates detected by the mutual capacitance mechanism 14B indicate similar positions.
- the self-capacitance mechanism 14A detects a first signal strength and the mutual capacitance mechanism 14B detects a second signal strength for each of a plurality of coordinates provided on the touch panel 14 .
- the touch panel controller 16 controls the touch panel 14.
- Touch panel controller 16 controls touch panel 14 based on either a self-capacitance mode for driving self-capacitance mechanism 14A or a mutual-capacitance mode for driving mutual-capacitance mechanism 14B.
- the touch panel controller 16 When controlling the touch panel 14 based on the self-capacitance mode, the touch panel controller 16 periodically transmits a drive pulse signal with the set number of pulses set in the self-capacitance mode.
- the self-capacitance mechanism 14A periodically detects the first signal intensity at each of the plurality of coordinates, with the set number of driving pulse signals as one unit.
- the touch panel controller 16 when controlling the touch panel 14 based on the mutual capacitance mode, the touch panel controller 16 periodically transmits the drive pulse signal with the set number of pulses set in the mutual capacitance mode.
- the mutual-capacitance mechanism 14B periodically detects the second signal intensity at each of the plurality of coordinates, with the set number of driving pulse signals as one unit.
- the diagnostic device 18 diagnoses the state of the touch panel 14 .
- the diagnostic device 18 may be a display control device that controls the display unit 12, a numerical control device that controls a machine tool, or a general-purpose personal computer.
- the diagnostic device 18 is a numerical control device
- the touch panel 14 is used as an input device of the numerical control device.
- the diagnostic device 18 has a processor 20 such as a CPU and MPU, and a storage medium 22 including various memories such as ROM, RAM, and hard disk. Diagnostic device 18 causes processor 20 to execute a diagnostic program stored in storage medium 22 . When the diagnostic program is executed, processor 20 operates as control unit 24 , signal strength acquisition unit 26 , state determination unit 28 , and notification unit 30 . At least one of the signal strength acquisition unit 26, the state determination unit 28, and the notification unit 30 may be implemented by an integrated circuit such as ASIC or FPGA. At least one of the signal strength acquisition unit 26, the state determination unit 28, and the notification unit 30 may be configured by an electronic circuit including a discrete device.
- the control unit 24 controls the touch panel 14 so that self-capacitance signal detection and mutual-capacitance signal detection are performed.
- the control unit 24 requests the touch panel controller 16 to execute the self-capacitance mode and the mutual capacitance mode. Thereby, the touch panel controller 16 drives the self-capacitance mechanism 14A and the mutual capacitance mechanism 14B.
- the control unit 24 may alternately drive the self-capacitance mechanism 14A and the mutual-capacitance mechanism 14B once each, or alternatively in a preset order.
- the signal strength acquisition unit 26 acquires the first signal strength detected based on the self-capacitance formula and the second signal strength detected based on the mutual capacitance formula at each of the plurality of coordinates. That is, the signal intensity acquisition unit 26 acquires the first signal intensity of each coordinate detected by the self-capacitance mechanism 14A by executing the self-capacitance mode. In addition, the signal intensity acquisition unit 26 acquires the second signal intensity of each coordinate detected by the mutual capacitance mechanism 14B by executing the mutual capacitance mode.
- the state determination unit 28 determines the state of the touch panel 14 based on each first signal strength and each second signal strength. Details of the state determination unit 28 will be described later.
- the notification unit 30 notifies the determination result of the state determination unit 28.
- the notification unit 30 can notify the determination result of the state determination unit 28 using at least one of the speaker and the display unit 12 . This allows the operator who operates the touch panel 14 to grasp the state of the touch panel 14 .
- the notification unit 30 When using a speaker, the notification unit 30 notifies the determination result of the state determination unit 28 by controlling the speaker. For example, the notification unit 30 causes the speaker to output a sound indicating the determination result of the state determination unit 28 .
- the notification unit 30 controls the display unit 12 to display the determination result of the state determination unit 28 on the screen of the display unit 12 . Details of this display will be described later.
- FIG. 2 is a block diagram showing the configuration of the state determination unit 28, and FIG. 3 is a diagram showing the determination criteria of the state determination unit 28.
- the state determination section 28 has a dirt determination section 32 , an operation abnormality determination section 34 and a panel abnormality determination section 36 .
- the dirt determination unit 32 determines dirt on the touch surface of the touch panel 14 based on each first signal strength and each second signal strength acquired by the signal strength acquisition unit 26 .
- first range AR1 a first range AR1
- second range AR2 a second range AR2
- third range AR3 which are highly reliable indicators for estimating contamination.
- the first range AR1 is a range that is less than the self-capacitance touch threshold STH TO and exceeds the abnormality threshold STH AN . Furthermore, the first range AR1 is a range equal to or greater than the positive threshold MTH D1 in the mutual capacitance formula.
- the self-capacitance touch threshold STH TO is a threshold set for determining that a touch operation has been performed based on the self-capacitance formula.
- the abnormality threshold STH AN is a threshold set for determining that the touch panel 14 is in an abnormal state.
- the positive threshold MTH D1 is a threshold set for determining whether the touch surface is dirty.
- the positive side threshold MTH D1 is set lower than the mutual capacitive touch threshold MTH TO and on the positive side of a reference value forming a positive/negative boundary.
- the first signal strength and the second signal strength tend to appear when dirt adheres to the touch surface in a non-contact state with the metal frame of the display unit 12 .
- the contamination determination unit 32 determines that the specific It is determined that the touch surface corresponding to the coordinates is dirty. As a result, it is possible to correctly grasp that dirt is attached to a specific position.
- the second range AR2 is a range that is less than the self-capacitance touch threshold STH TO and exceeds the abnormality threshold STH AN . Furthermore, the second range AR2 is a range equal to or less than the negative side threshold MTH D2 in the mutual capacitance formula. Note that the negative threshold MTH D2 is a threshold that is set to determine whether the touch surface is dirty. The negative threshold MTH D2 is set lower than the mutual capacitive touch threshold MTH TO and the positive threshold MTH D1 and on the negative side of the reference value forming the boundary between positive and negative.
- the first signal intensity and the second signal intensity tend to appear when dirt adheres to the touch surface in a non-contact state with the metal frame of the display unit 12 .
- the dirt determination unit 32 determines that the specific It is determined that the touch surface corresponding to the coordinates is dirty. As a result, it is possible to correctly grasp that dirt is attached to a specific position.
- the third range AR3 is a range equal to or higher than the self-capacitance touch threshold STH TO in the self-capacitance method. Further, the third range AR3 is a range below the mutual capacitive touch threshold MTH TO in the mutual capacitive formula.
- the dirt determination unit 32 determines that the specific coordinate corresponds to It is determined that the touch surface to be touched is dirty. As a result, it is possible to correctly grasp that dirt is attached to a specific position.
- the operation abnormality determination unit 34 determines operation abnormality with respect to the touch surface of the touch panel 14 based on each first signal strength and each second signal strength acquired by the signal strength acquisition unit 26 . If the second signal strength at a specific coordinate where the first signal strength is equal to or higher than the self-capacitance touch threshold STH TO is equal to or higher than the mutual capacitive touch threshold MTH TO , the operation abnormality determination unit 34 determines the specific coordinate. Detected as an operating position.
- the operation abnormality determination unit 34 counts the number of detected operation positions as the number of operation points. It should be noted that the number of operation points is reset in units of cycles of detecting the first signal strength and the second signal strength at each of the plurality of coordinates on touch panel 14 . The operation abnormality determination unit 34 determines that there is an operation abnormality with respect to the touch surface when the number of specific coordinates exceeds the operation score threshold. As a result, abnormalities in the number of operation points can be detected more accurately than when the operation position is detected using only the first signal intensity or the second signal intensity.
- the panel abnormality determination section 36 determines abnormality of the touch panel 14 based on each first signal strength acquired by the signal strength acquisition section 26 . In general, if the touch panel 14 is normal, the first signal strength takes a positive value. Therefore, the anomaly threshold STH AN is set to zero or a value close to zero. The panel abnormality determination unit 36 determines that the touch panel 14 is abnormal when there is at least one first signal strength that is equal to or less than the abnormality threshold STH AN . As a result, anomalies can be detected correctly and immediately.
- the state determination unit 28 may determine that the touch panel 14 is normal when all of the following three conditions are satisfied.
- the first condition is when the contamination determination unit 32 does not determine that the touch surface is soiled.
- the second condition is when the operation abnormality determination unit 34 does not determine that there is an operation abnormality with respect to the touch surface.
- a third condition is when the panel abnormality determination unit 36 does not determine that the touch panel 14 is abnormal.
- FIG. 4 is a block diagram showing the configuration of the notification unit 30, and FIG. 5 is a diagram showing a display example of the state of the touch panel 14.
- Notification unit 30 has dirt notification unit 38 , operation abnormality notification unit 40 , and panel abnormality notification unit 42 .
- the notification unit 30 displays the diagnosis screen 46 on the display screen of the display unit 12 , for example.
- the contamination notification unit 38 causes the contamination image 48 (48A, 48B) to be displayed on the panel scale screen 50 within the diagnosis screen 46 based on the specific coordinates determined to be contamination by the contamination determination unit 32.
- the dirt image 48 (48A, 48B) is an image showing a dirt portion of the touch panel 14. FIG. As a result, the operator who operates the touch panel 14 can be easily informed of the dirty spots.
- the operation abnormality notification unit 40 displays a predetermined display field in the diagnosis screen 46 based on the specific coordinates detected by the operation abnormality determination unit 34 when the operation abnormality determination unit 34 determines that there is an operation abnormality on the touch surface. 52 displays the number of operation points. As a result, the operator who operates the touch panel 14 can be made aware of the number of operations. When a number different from the number of actual operation points by the operator is displayed, it is possible to indirectly alert the operator that the touch surface is dirty or the like. Note that the operation abnormality notification unit 40 may display the operation score together with the operation score threshold. In FIG. 5, the operation score threshold is described as a maximum value.
- the operation abnormality notification unit 40 determines the scale of the panel in the diagnostic screen 46 based on the specific coordinates detected by the operation abnormality determination unit 34 when the operation abnormality determination unit 34 determines that there is an operation abnormality on the touch surface.
- An operation image 54 is displayed on the screen 50 .
- the operation image 54 is an image showing the current operation site.
- the panel abnormality notification unit 42 blinks the alarm button 56 in the diagnostic screen 46, for example, when the panel abnormality determination unit 36 determines that the touch panel 14 is abnormal. Thereby, the operator who operates the touch panel 14 can be informed that the touch panel 14 is abnormal.
- the notification unit 30 may also notify a message indicating countermeasures against the determination result. For example, when the contamination determination unit 32 determines that the touch surface is dirty, the notification unit 30 causes the message field 58 in the diagnostic screen 46 to display characters such as "Please wipe off the dirt.” Thereby, a message prompting removal of dirt can be notified. Further, when the operation abnormality notification unit 40 determines that there is an operation abnormality with respect to the touch surface, the notification unit 30 causes the message column 58 in the diagnosis screen 46 to display characters such as "please stop touching”. Thereby, a message prompting the user to wait for the touch operation can be sent.
- the notification unit 30 displays characters such as "Please contact the manufacturer's service" in the message field 58 in the diagnosis screen 46. . This may notify a message prompting contact with the manufacturer's service.
- the notification unit 30 notifies a message indicating countermeasures against the determination result of the state determination unit 28.
- the operator who operates the touch panel 14 can be informed in an easy-to-understand manner how to improve the state of the touch panel 14 when the state of the touch panel 14 is poor.
- the message may be voice.
- FIG. 6 is a flow chart showing the procedure of diagnostic processing when the processor 20 is caused to execute the diagnostic program.
- step S1 the control unit 24 controls the touch panel 14 so that self-capacitance signal detection and mutual-capacitance signal detection are performed. That is, the control unit 24 requests the touch panel controller 16 to execute the self-capacitance mode and the mutual capacitance mode. Thereby, the touch panel controller 16 drives the self-capacitance mechanism 14A and the mutual capacitance mechanism 14B.
- the diagnostic process proceeds to step S2.
- step S2 the signal strength acquisition unit 26 acquires the first signal strength detected by the self-capacitance mechanism 14A and the second signal strength detected by the mutual capacitance mechanism 14B at each of a plurality of coordinates. . After obtaining the first signal strength and the second signal strength at each of the plurality of coordinates, the diagnosis process proceeds to step S3.
- step S3 the state determination unit 28 determines the state of the touch panel 14 based on the first signal strength and the second signal strength at each of the multiple coordinates.
- the state determination unit 28 determines whether the second signal strength at a specific coordinate where the first signal strength is less than the self-capacitance touch threshold STH TO and exceeds the abnormality threshold STH AN is equal to or greater than the positive threshold MTH D1 or equal to or less than the negative threshold MTH D2 . If so, it is determined that the touch surface corresponding to the specific coordinates is dirty. Further, when the second signal strength at a specific coordinate where the first signal strength is equal to or higher than the self-capacitance touch threshold STH TO is less than the mutual capacitive touch threshold MTH TO , the state determination unit 28 determines It is determined that the corresponding touch surface is dirty.
- the state determination unit 28 determines the specific coordinate as Detected as an operation position. In this case, the state determination unit 28 determines that the operation on the touch surface is abnormal when the number of specific coordinates detected as the operation position exceeds the operation score threshold. Moreover, the state determination unit 28 determines that the touch panel 14 is abnormal when there is at least one first signal strength that is equal to or less than the abnormality threshold STH AN . Note that the state determination unit 28 may determine that the touch panel 14 is normal when none of these cases apply. After the state of the touch panel 14 is determined, the diagnosis process proceeds to step S4.
- step S4 the notification unit 30 notifies the determination result of the state determination unit 28.
- the diagnostic process ends.
- each step S2 to S4 of the diagnostic process may be executed multiple times in units of n cycles for detecting the first signal strength and the second signal strength at each of a plurality of coordinates of the touch panel 14 .
- "n" is an integer of 1 or more.
- each of steps S2 to S4 of the diagnostic process is executed in units of n cycles of detecting the first signal strength and the second signal strength at each of the plurality of coordinates of the touch panel 14 until a predetermined diagnostic period elapses.
- each step S2 to S4 of the diagnostic process is executed in units of n cycles of detecting the first signal strength and the second signal strength at each of the plurality of coordinates of the touch panel 14 until the operator performs a diagnosis end operation. You may
- the first signal strength detected by the self-capacitance method and the second signal strength detected by the mutual capacitance method are obtained for each of a plurality of coordinates. Further, in the present embodiment, the state of the touch panel 14 is determined based on the acquired first signal strength and second signal strength. As a result, the state of the touch panel 14 can be grasped more precisely than when only the first signal strength or the second signal strength is obtained.
- the first range AR1 is a range that is less than the self-capacitance touch threshold STH TO and exceeds the abnormality threshold STH AN . Further, the first range AR1 is a range equal to or greater than the positive threshold MTH D1 in the mutual capacitance formula.
- the second range AR2 is a range that is less than the self-capacitance touch threshold STH TO and exceeds the abnormality threshold STH AN . Further, the second range AR2 is a range equal to or less than the negative side threshold MTH D2 in the mutual capacitance formula.
- the second signal strength at a specific coordinate where the first signal strength is less than the self-capacitance touch threshold STH TO and exceeds the abnormal threshold STH AN is greater than or equal to the positive threshold MTH D1 or less than or equal to the negative threshold MTH D2 . If so, it is determined that the touch surface corresponding to the specific coordinates is dirty. As a result, it is possible to correctly grasp that dirt is attached to a specific position.
- the third range AR3 is a range equal to or higher than the self-capacitance touch threshold STH TO in the self-capacitance method. Further, the third range AR3 is a range less than the mutual capacitance type touch threshold MTH TO in the mutual capacitance type.
- the specific coordinate corresponds to the It is determined that the touch surface is dirty. As a result, it is possible to correctly grasp that dirt is attached to a specific position. This determination is useful in that dirt adhering from the touch surface to the outside of the touch surface can be captured.
- the determination result is displayed on the screen of the display unit 12 provided with the touch panel 14 .
- the operator who operates the touch panel 14 can grasp the state of the touch panel 14 while performing the touch operation.
- FIG. 7 is a block diagram showing the configuration of part of the diagnostic device 18 of Modification 1. As shown in FIG. In FIG. 7, the same reference numerals are assigned to the same configurations as those described in the embodiment. In addition, in this modification, the description which overlaps with embodiment is omitted.
- an operation invalidation unit 60 is newly provided.
- the operation invalidation unit 60 invalidates the operation for the specific coordinates detected as the operation position by the operation abnormality determination unit 34 . This makes it possible to prevent an instruction from being executed based on an unintended operation.
- FIG. 8 is a block diagram showing a configuration of part of the diagnostic device 18 of Modification 2. As shown in FIG. In FIG. 8, the same reference numerals are assigned to the same configurations as those described in the embodiment. In addition, in this modification, the description which overlaps with embodiment is omitted.
- the diagnostic device 18 of Modification 2 is newly provided with a threshold value setting unit 62 .
- the threshold setting unit 62 sets at least one of a self-capacitance touch threshold STH TO , a mutual capacitance touch threshold MTH TO , a positive threshold MTH D1 , a negative threshold MTH D2 , and an abnormal threshold STH AN according to an operator's operation. set. Accordingly, the scale for determining the state of the touch panel 14 can be changed according to the environment in which the touch panel 14 is arranged.
- the dirt determination unit 32 may determine that the touch surface at the specific coordinates is dirty. As a result, erroneous determination that the touch surface is dirty due to momentary noise or the like can be suppressed.
- the notification unit 30 may not be provided. Even if the notification unit 30 is not provided, the state of the touch panel 14 can be grasped in detail. In addition, it becomes possible to execute processing according to the state of the touch panel 14 .
- a first invention is a diagnostic device (18) for diagnosing a capacitive touch panel (14) capable of detecting signals based on each of a self-capacitance type and a mutual-capacitance type, wherein the self-capacitance type signal and a mutual-capacitance type signal detection;
- a signal strength acquisition unit (26) for acquiring signal strength and second signal strength detected at each of a plurality of coordinates based on the mutual capacitance formula, and each first signal strength and each second signal obtained
- a state determination unit (28) that determines the state of the touch panel based on the strength.
- the state determination unit determines that the first signal strength is less than the self-capacitance touch threshold (STH TO ) and the second signal strength at the specific coordinate exceeds the abnormality threshold (STH AN ) set lower than the self-capacitance touch threshold. , is greater than or equal to the positive threshold (MTH D1 ) set lower than the mutual capacitive touch threshold (MTH TO ), or is less than or equal to the negative threshold (MTH D2 ) set lower than the positive threshold, specified It may be determined that the touch surface corresponding to the coordinates of is dirty. As a result, it is possible to correctly grasp that dirt is attached to a specific position based on a range in which the first signal strength and the second signal strength behave in a highly reliable range as an index for estimating dirt. can.
- the state determination unit determines that the touch surface corresponding to the specific coordinates is dirty when the second signal strength at the specific coordinates where the first signal strength is equal to or greater than the self-capacitance touch threshold is less than the mutual capacitance touch threshold. It may be determined that there is As a result, it is possible to correctly grasp that dirt is attached to a specific position based on a range in which the first signal strength and the second signal strength behave in a highly reliable range as an index for estimating dirt. can.
- the state determination unit may determine that the touch surface is dirty when the first signal strength and the second signal strength appear at specific coordinates continuously for a specified period. As a result, erroneous determination that the touch surface is dirty due to transient noise or the like can be suppressed.
- the state determination unit detects the specific coordinates as the operation position when the second signal strength at the specific coordinates where the first signal strength is equal to or higher than the self-capacitance touch threshold is equal to or higher than the mutual capacitive touch threshold, and detects It may be determined that there is an operation abnormality on the touch surface when the number of touched operation positions exceeds the operation score threshold. As a result, an abnormality in the number of operation points can be detected more accurately than when the operation position is determined using only the first signal strength or the second signal strength.
- the diagnostic device may include an operation invalidation unit (60) that invalidates an operation on specific coordinates detected by the state determination unit as the operation position when the number of operation positions exceeds the operation point number threshold. This makes it possible to prevent an instruction from being executed based on an unintended operation.
- an operation invalidation unit 60 that invalidates an operation on specific coordinates detected by the state determination unit as the operation position when the number of operation positions exceeds the operation point number threshold. This makes it possible to prevent an instruction from being executed based on an unintended operation.
- the state determination unit may determine that the touch panel is abnormal when there is at least one first signal strength that is equal to or less than an abnormality threshold set lower than the self-capacitance touch threshold. Accordingly, it is possible to inform the operator who operates the touch panel that the touch panel is abnormal.
- the diagnostic device may include a notification unit (30) that notifies the determination result of the state determination unit. This allows the operator who operates the touch panel to grasp the state of the touch panel.
- the notification unit may display the determination result on the screen of the display unit (12) provided with a touch panel.
- the operator who operates the touch panel can grasp the state of the touch panel while performing the touch operation.
- the notification unit may notify a message indicating countermeasures against the determination result of the state determination unit. As a result, it is possible to convey in an easy-to-understand manner how to improve when the state of the touch panel is bad.
- the diagnostic device may include a threshold setting unit (62) that sets at least one of a self-capacitance touch threshold, a mutual capacitance touch threshold, a positive threshold, a negative threshold, and an abnormal threshold in accordance with an operator's operation. good. This makes it possible to change the scale for determining the state of the touch panel according to the environment in which the touch panel is arranged.
- a threshold setting unit (62) that sets at least one of a self-capacitance touch threshold, a mutual capacitance touch threshold, a positive threshold, a negative threshold, and an abnormal threshold in accordance with an operator's operation. good. This makes it possible to change the scale for determining the state of the touch panel according to the environment in which the touch panel is arranged.
- a second invention is a diagnostic method for diagnosing a capacitive touch panel capable of detecting a signal based on each of the self-capacitance type and the mutual capacitive type, wherein the detection of the self-capacitance type signal and the mutual capacitive type a control step (S1) for controlling the touch panel so as to detect a signal of; a first signal strength detected at each of a plurality of coordinates provided on the touch panel based on the self-capacitance formula; A signal strength obtaining step (S2) of obtaining the second signal strength detected at each of the plurality of coordinates based on the formula, and based on the obtained first signal strength and each second signal strength, the touch panel and a state determination step (S3) for determining the state of As a result, the state of the touch panel can be captured more precisely than when only the first signal strength or the second signal strength is obtained.
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Abstract
Description
自己容量式と相互容量式との各々に基づいて信号を検出可能な静電容量式のタッチパネルを診断する診断装置であって、
前記自己容量式の信号の検出と前記相互容量式の信号の検出とが実行されるように前記タッチパネルを制御する制御部と、
前記自己容量式に基づいて、前記タッチパネルに設けられる複数の座標の各々で検出される第1信号強度と、前記相互容量式に基づいて、前記複数の座標の各々で検出される第2信号強度とを取得する信号強度取得部と、
取得される各前記第1信号強度および各前記第2信号強度に基づいて、前記タッチパネルの状態を判定する状態判定部と、
を備える。
自己容量式と相互容量式との各々に基づいて信号を検出可能な静電容量式のタッチパネルを診断する診断方法であって、
前記自己容量式の信号の検出と前記相互容量式の信号の検出とが実行されるように前記タッチパネルを制御する制御ステップと、
前記自己容量式に基づいて、前記タッチパネルに設けられる複数の座標の各々で検出される第1信号強度と、前記相互容量式に基づいて、複数の前記座標の各々で検出される第2信号強度とを取得する信号強度取得ステップと、
取得される各前記第1信号強度および各前記第2信号強度に基づいて、前記タッチパネルの状態を判定する状態判定ステップと、
を含む。
図1は、表示システム10の構成を示すブロック図である。表示システム10には、表示部12、タッチパネル14、タッチパネルコントローラ16および診断装置18が備えられる。
上記の実施形態は、下記のように変形してもよい。
図7は、変形例1の診断装置18の一部の構成を示すブロック図である。図7では、実施形態において説明した構成と同等の構成には同一の符号が付されている。なお、本変形例では、実施形態と重複する説明は割愛する。
図8は、変形例2の診断装置18の一部の構成を示すブロック図である。図8では、実施形態において説明した構成と同等の構成には同一の符号が付されている。なお、本変形例では、実施形態と重複する説明は割愛する。
第1信号強度および第2信号強度が所定期間連続して特定の座標に現れる場合に、汚れ判定部32は、特定の座標におけるタッチ面が汚れていると判定してもよい。これにより、瞬間的なノイズ等に起因してタッチ面が汚れていると誤って判定することを抑制することができる。
通知部30は、備えられていなくてもよい。通知部30が備えられていなくても、タッチパネル14の状態を細かく捉えることができる。また、タッチパネル14の状態に応じた処理等の実行が可能となる。
上記の実施形態および変形例1~4は、矛盾の生じない範囲で任意に組み合わされてもよい。
以下に、上記の実施形態および変形例1~5から把握し得る発明として、第1の発明および第2の発明を記載する。
第1の発明は、自己容量式と相互容量式との各々に基づいて信号を検出可能な静電容量式のタッチパネル(14)を診断する診断装置(18)であって、自己容量式の信号の検出と相互容量式の信号の検出とが実行されるようにタッチパネルを制御する制御部(24)と、自己容量式に基づいて、タッチパネルに設けられる複数の座標の各々で検出される第1信号強度と、相互容量式に基づいて、複数の座標の各々で検出される第2信号強度とを取得する信号強度取得部(26)と、取得される各第1信号強度および各第2信号強度に基づいて、タッチパネルの状態を判定する状態判定部(28)と、を備える。これにより、第1信号強度または第2信号強度だけを取得する場合に比べて、タッチパネルの状態を細かく捉えることができる。
第2の発明は、自己容量式と相互容量式との各々に基づいて信号を検出可能な静電容量式のタッチパネルを診断する診断方法であって、自己容量式の信号の検出と相互容量式の信号の検出とが実行されるようにタッチパネルを制御する制御ステップ(S1)と、自己容量式に基づいて、タッチパネルに設けられる複数の座標の各々で検出される第1信号強度と、相互容量式に基づいて、複数の座標の各々で検出される第2信号強度とを取得する信号強度取得ステップ(S2)と、取得される各第1信号強度および各第2信号強度に基づいて、タッチパネルの状態を判定する状態判定ステップ(S3)と、を含む。これにより、第1信号強度または第2信号強度だけを取得する場合に比べて、タッチパネルの状態を細かく捉えることができる。
Claims (12)
- 自己容量式と相互容量式との各々に基づいて信号を検出可能な静電容量式のタッチパネル(14)を診断する診断装置(18)であって、
前記自己容量式の信号の検出と前記相互容量式の信号の検出とが実行されるように前記タッチパネルを制御する制御部(24)と、
前記自己容量式に基づいて、前記タッチパネルに設けられる複数の座標の各々で検出される第1信号強度と、前記相互容量式に基づいて、前記複数の座標の各々で検出される第2信号強度とを取得する信号強度取得部(26)と、
取得される各前記第1信号強度および各前記第2信号強度に基づいて、前記タッチパネルの状態を判定する状態判定部(28)と、
を備える診断装置。 - 請求項1に記載の診断装置であって、
前記状態判定部は、前記第1信号強度が自己容量式タッチ閾値(STHTO)未満、かつ、前記自己容量式タッチ閾値より低く設定される異常閾値(STHAN)を超える特定の座標における前記第2信号強度が、相互容量式タッチ閾値(MTHTO)より低く設定される正側閾値(MTHD1)以上であり、または、前記正側閾値より低く設定される負側閾値(MTHD2)以下である場合に、前記特定の座標に相当するタッチ面が汚れていると判定する、診断装置。 - 請求項1または2に記載の診断装置であって、
前記状態判定部は、前記第1信号強度が自己容量式タッチ閾値以上である特定の座標における前記第2信号強度が、相互容量式タッチ閾値未満である場合に、前記特定の座標に相当するタッチ面が汚れていると判定する、診断装置。 - 請求項2または3に記載の診断装置であって、
前記状態判定部は、前記特定の座標に前記第1信号強度および前記第2信号強度が規定期間を継続して現れる場合に、前記タッチ面が汚れていると判定する、診断装置。 - 請求項1~4のいずれか1項に記載の診断装置であって、
前記状態判定部は、前記第1信号強度が自己容量式タッチ閾値以上である特定の座標における前記第2信号強度が、相互容量式タッチ閾値以上である場合に、前記特定の座標を操作位置として検出し、検出した前記操作位置の数が操作点数閾値を超える場合に、タッチ面に対する操作異常があると判定する、診断装置。 - 請求項5に記載の診断装置であって、
前記操作位置の数が前記操作点数閾値を超える場合に、前記操作位置として前記状態判定部が検出した前記特定の座標に対する操作を無効にする操作無効化部(60)を備える、診断装置。 - 請求項1~6のいずれか1項に記載の診断装置であって、
前記状態判定部は、自己容量式タッチ閾値より低く設定される異常閾値以下である少なくとも1つの前記第1信号強度がある場合に、前記タッチパネルが異常であると判定する、診断装置。 - 請求項1~7のいずれか1項に記載の診断装置であって、
前記状態判定部の判定結果を通知する通知部(30)を備える、診断装置。 - 請求項8に記載の診断装置であって、
前記通知部は、前記タッチパネルが設けられる表示部(12)の画面に、前記判定結果を表示させる、診断装置。 - 請求項8または9に記載の診断装置であって、
前記通知部は、前記状態判定部の判定結果に対する対策を示すメッセージを通知する、診断装置。 - 請求項2に記載の診断装置であって、
オペレータの操作に応じて、前記自己容量式タッチ閾値、前記相互容量式タッチ閾値、前記正側閾値、前記負側閾値および前記異常閾値の少なくとも1つを設定する閾値設定部(62)を備える、診断装置。 - 自己容量式と相互容量式との各々に基づいて信号を検出可能な静電容量式のタッチパネルを診断する診断方法であって、
前記自己容量式の信号の検出と前記相互容量式の信号の検出とが実行されるように前記タッチパネルを制御する制御ステップ(S1)と、
前記自己容量式に基づいて、前記タッチパネルに設けられる複数の座標の各々で検出される第1信号強度と、前記相互容量式に基づいて、前記複数の座標の各々で検出される第2信号強度とを取得する信号強度取得ステップ(S2)と、
取得される各前記第1信号強度および各前記第2信号強度に基づいて、前記タッチパネルの状態を判定する状態判定ステップ(S3)と、
を含む診断方法。
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