JP5079743B2 - Touch panel input display device - Google Patents

Description

  The present invention relates to a touch panel type input display device having a display screen function for displaying predetermined contents and an input operation function for performing input on the display screen by a user's contact operation.

  In recent years, an input display device having a transparent touch panel input means on the front surface of a display screen such as a liquid crystal display or a plasma display has appeared. When the user touches the touch panel with a finger or a dedicated pen, the input position can be detected. Therefore, the user can input by touching the display image in conjunction with the screen display. For this reason, it is widely used in various fields as an input device that is intuitive and easy to operate.

  As shown in FIG. 13, the touch panel type input display device 100 includes a touch panel 101 that performs an input operation by contact, a display unit 102 such as a liquid crystal, and a housing 103 that supports and fixes them. A non-operation area 104 that does not perform an input operation is formed at the peripheral edge of the touch panel 101, and the support protrusion 103 a of the housing 103 is in contact with and fixed to the non-operation area 104. Furthermore, a gap is provided between the front end portion 103b of the housing 103 extending from the support convex portion 103a to the touch panel side so as not to malfunction even if the touch panel 101 is slightly deformed.

  When foreign matter 105 (a staple needle or a clip removed from the document, etc.) is mixed between the touch panel unit 101 and the housing 103 (FIG. 14A: foreign matter between the tip portion 103b and the touch panel 101), When the mechanical fitting failure occurs when the touch panel is assembled (FIG. 14 (b): deformation of the housing, FIG. 14 (c): deformation of the touch panel), etc. May be.

A coordinate detection procedure for input by a conventional touch panel will be described with reference to FIG.
When the power is turned on (step S101) and the user presses the touch panel to detect whether the touch panel is turned on (step S102), the input coordinates are determined and the coordinate information is notified to the apparatus main body (step S103). It is detected whether the touch panel input is turned off (step S104). If the input is turned off, the information is notified to the apparatus main body (step S105), and the process returns to step S102. If the input ON state continues, it is detected whether there is a change in the input coordinates (step S106), and if there is no change, the process returns to step S104. If there is a change in the input coordinates, the input coordinates are confirmed, the coordinate information is notified to the apparatus main body (step S107), and the process returns to step S104.

  However, with this detection method, if the touch panel is already in the ON state when the power is turned on due to the problem shown in FIG. 14, the user input is not accepted at all, and the input is turned OFF, that is, the removal of foreign matter. There is a problem that input cannot be performed until repairs are made.

  Therefore, in the technique of Patent Document 1, a region where the touch operation is invalidated is provided on the outer peripheral portion of the touch panel portion so as not to malfunction due to the biting of foreign matter.

JP 2006-244154 A

  However, in the technique of Patent Document 1, by providing a region where the touch operation is invalid on the outer peripheral portion of the touch panel portion, the input possible area is narrowed, and the degree of freedom of operation is narrowed. In particular, when the display area is small or there are many operation items on one screen, one operation cannot be performed unless a plurality of screens are displayed, and the operation may be complicated.

  Further, in the technique of Patent Document 1, in a touch panel type input device that cannot perform multi-point input, if two points are pressed at the same time, incorrect coordinates are calculated. There is also a problem that the exact coordinates of the input position cannot be obtained.

  In view of such circumstances, the present invention provides a touch panel type input display device that allows operation to be continued while correcting input coordinates to an accurate value even when the touch panel input device is kept pressed from the start. The purpose is to do.

The present invention relates to a touch panel type input display device including a display unit that displays an image and a touch panel unit that is arranged on the front surface and enables contact input.
Input detection means for detecting an input to the touch panel unit and outputting the input value, coordinate calculation means for obtaining coordinates of an input position based on the input value, and the touch panel unit is always input even when no user is input. A coordinate correction unit that corrects the input coordinates of the coordinate calculation unit to a correct value in an abnormal state, and the abnormal state of the touch panel unit is determined by the input detection unit, and the coordinate calculation unit in the abnormal state. Is determined by the coordinate correction means based on the abnormal coordinates that are always input abnormal positions obtained by the user and the input coordinates of the user. If correction is possible, the coordinate correction means Coordinate control means for performing correction is provided.

  Here, when the touch panel unit is in the abnormal state, the coordinate control unit causes the display unit to display an arbitrary designated position that instructs the user to input, and the coordinate of the designated position and the coordinate calculating unit The coordinates of the calculated user input position are compared, and it is determined whether the correction can be made by the coordinate correction means.

  In addition, the coordinate control means sets an arbitrary designated position for instructing an input to the user as a position farthest from the abnormal position.

  Further, the touch panel unit is a resistive film type, and the coordinate control unit is configured such that the coordinate of the user input position with respect to the arbitrary designated position is approximately the middle point between the abnormal coordinate and the coordinate of the designated position. It is characterized in that it is determined that correction is possible by the coordinate correction means.

In addition, the coordinate correction means includes abnormal coordinates (X _A , Y _A ), coordinates of the user input position obtained by the coordinate calculation means (X _I , Y _I ), and input coordinates corrected by the coordinate correction means. (X, Y)
X = X _I * 2-X _A
Y = Y _I * 2-Y _A
It is characterized by correcting.

  Further, the coordinate control means displays, when the coordinate correction is impossible due to an abnormal state of the touch panel unit, to that effect on the display unit.

  Further, the coordinate control means displays the abnormal coordinates obtained by the coordinate calculation unit on the display unit.

  According to the present invention, the abnormal coordinates of the abnormal input obtained by the coordinate calculating means and the input coordinates of the user can be obtained even when a foreign matter biting occurs and an abnormal state that is always input even in a non-input state occurs. Based on the above, it is determined whether or not correction is possible by the coordinate correction unit. If correction is possible, the coordinate correction unit corrects the input coordinates, so that the touch operation input becomes invalid as in the prior art. It is possible to maintain a large operable area without providing an area, and to determine the true coordinates of the position touched by the user even in an abnormal state, thereby achieving an excellent effect of allowing the user to continue the operation.

  Further, according to the present invention, the coordinates of the input instruction display position are compared with the coordinates of the user input position calculated by the coordinate calculation means, and it is determined whether the correction is possible by the coordinate correction means. Correction processing can be performed only in this case, and the processing efficiency can be improved.

  Further, according to the present invention, since the arbitrary input position for instructing the user to input is the position farthest from the abnormal position, the detected coordinates are greatly different from the abnormal coordinates, and the coordinate control means determines the abnormal state. It becomes easy to do. In particular, when the touch panel unit is of the resistive film type, it can be determined that correction can be easily performed based on whether or not the coordinates of the user input position are approximately the middle point between the abnormal coordinates and the coordinates of the designated position. As a result, the coordinate correction means can easily correct the input coordinates because they are half of the abnormal coordinates and the true coordinates.

  Further, according to the present invention, when coordinate correction is impossible due to an abnormal state of the touch panel unit, the fact is displayed on the display unit, so that the user can know why the input is impossible and It becomes possible.

  Further, according to the present invention, since abnormal coordinates are displayed, it is possible in some cases to remove the cause of abnormality such as foreign matter.

It is a block diagram which shows an example of the multifunctional machine provided with the touchscreen type display apparatus of this invention. It is an external view of an operation panel part. It is an assembly drawing of an operation panel part. It is an external view of a touch panel. It is a flowchart which shows the control processing of a panel control part. It is a flowchart which shows the control processing of the panel control part following FIG. It is a flowchart which shows the process of coordinate correction. It is a figure which shows the display at the time of normal, and the warning display at the time of abnormality. It is a figure which shows the cross key display and warning display at the time of abnormality. It is a figure which shows the warning display in case it has a some abnormal point. It is a figure which shows the confirmation display in case input is possible even if it is abnormal. It is a figure which shows the warning display of the service man call at the time of abnormality. It is a figure which shows the normal state of the conventional touchscreen type input display apparatus. It is a figure which shows the abnormal state of the conventional touchscreen type input display apparatus. It is a flowchart which shows the coordinate detection procedure of the conventional touchscreen type input display apparatus.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a block diagram showing an example of a multi-function machine equipped with a touch panel display device of the present invention. The multifunction machine 10 is an apparatus having a copy mode, a printer mode, a scanner mode, and a facsimile mode.

  The multifunction machine 10 includes an operation panel unit 11 through which a user performs operation input, a panel control unit 12 through which operation display is controlled and an input position is detected, a scanner unit 13 that reads a document and uses it as image data, and a scanner unit 13 An image processing unit 14 that performs processing for printing based on image data and image data from an external device (such as a computer), an image storage unit 15 that stores processed image data, a paper feeding unit 16 that feeds recording paper, The recording sheet conveying unit 17 conveys the recording sheet, the image forming unit 18 forms an image on the conveyed recording sheet, and the main control unit 19 controls each unit.

  The operation panel unit 11 includes a touch panel 21, an operation switch 22, an LCD 23, and an LED 24. FIG. 2 is an external view of the operation panel unit 11, and FIG. 3 is an assembly diagram of the operation panel unit 11.

  The operation panel unit 11 has a touch panel 21 as an input device arranged on the front surface of the LCD 23 which is a display device. The touch panel 21 is transparent, and the user can input while looking at the image displayed on the LCD 21 directly below. Around the touch panel 21 and the LCD 23, an operation switch 22 of the multifunction machine 10 and an LED 24 indicating a processing state are arranged.

As shown in FIG. 3, the operation panel unit 11 includes, in order from the top, a casing 41 for storing and fixing each part, a touch panel 21, an LCD folder 42 for storing and fixing an LCD, an LCD 23, and an LCD folder 43. And assemble.
The display device is not limited to the LCD, and may be a plasma display or an organic EL display, for example.

FIG. 4 is an external view of the touch panel 21.
The touch panel 21 is a resistive touch panel rectangular touch panel.
In general, a resistive film type touch panel has a very small spacer sandwiched between surfaces of a glass surface serving as a base, and a flexible transparent film is attached to the surface. A transparent electrode grid called ITO (Indium Tin Oxide) is provided on the opposing surfaces of the glass and the film. When the film surface is touched, the film bends due to pressure, contacts the electrode on the glass surface, electricity flows, and the pressed position is detected by measuring the partial pressure ratio by the resistance of the transparent electrode on the glass surface and the film surface. . That is, if a voltage is applied to one of the two opposing resistance films, a voltage corresponding to the operated position is generated on the second sheet. By detecting this voltage division ratio, it is possible to detect the place operated as an analog quantity.

  The touch panel 21 is provided with a non-operation area 51 in which an input operation is impossible at outer edges of four sides, and an operation non-guaranteed area 52 that can perform an input operation but is not guaranteed as an input operation. Inside 52 is an operation area 53 in which touch input is possible. As shown in FIG. 13, the support convex portion of the housing 41 is in contact with the non-operation area 51 to support and fix the touch panel 21. The touch panel 21 is provided with a flexible cable 54 connected to the panel control unit 12, and outputs a voltage value detected by an input operation in the operation area 53.

The panel control unit 12 includes an input detection unit 31, a coordinate calculation unit 32, a coordinate control unit 33, a coordinate correction unit 34, a display control unit 35, and a storage unit 36.
The input detection unit 31 detects the presence or absence of input from the voltage value output from the touch panel 21. Further, the input of the operation switch 22 is also detected and notified to the main control unit 19 via the coordinate control unit 33.
The coordinate calculation unit 32 obtains the coordinates of the input position by performing A / D conversion or the like of the detected voltage value. When there is an abnormality in the touch panel 21, the coordinate correction unit 34 corrects the coordinates calculated by the coordinate calculation unit 32 to correct coordinates.
The coordinate control unit 33 determines whether the touch panel 21 is normal or abnormal. If the touch panel 21 is abnormal, the coordinate control unit 33 determines whether coordinate correction is possible. If the correction is possible, the coordinate correction unit 34 performs coordinate correction. . Further, the display relating to the coordinate processing is performed on the LCD 23 via the display control unit 35.
The display control unit 35 performs display or lighting control on the LCD 23 and the LED 23 according to an instruction from the main control unit 19. In addition, display related to coordinate processing is performed according to an instruction from the coordinate control unit 33.

The scanner unit 13 is capable of reading on both sides, and reads a double-sided image at once by the front surface CCD 37 and the back surface CCD 38. The image data read in this way or the image data sent from the external device 20 is temporarily stored in the image storage unit 15.
The image processing unit 14 reads out image data read by the scanner unit 13 and image data from the external device 20 from the image storage unit 15 and performs image processing necessary for image formation (printing) such as compression and decompression.
The paper feed unit 16 feeds the recording paper stored in the multifunction machine 10 to the recording paper transport unit 17.
The recording paper transport unit 17 transports the fed recording paper to the image forming unit 18.
The image forming unit 18 forms an image on recording paper, and forms a toner image on the recording paper by a laser scanning unit.
The main control unit 19 controls each unit of the multifunction machine 10.

  Next, operations of the operation panel unit 11 and the panel control unit 12 which are the touch panel display device of the present invention will be described in detail. 5 and 6 are flowcharts showing the control processing of the panel control unit 12.

  When the apparatus power supply of the multifunction machine 10 is activated (step S11), the coordinate control unit 33 confirms whether the touch panel 21 is pressed and turned on by the detection of the input detection unit 31 of the panel control unit 12 (step S12). If it is not turned on, the process proceeds to step S16, where the coordinate control unit 33 determines that the touch panel 21 is normal, and performs an operation in a normal flow. In other words, the main control unit 19 is notified of the coordinates calculated by the coordinate calculation unit 32 based on the detection values obtained by the input detection unit 31.

  When the touch panel 21 is ON, the detection value by the input detection unit 31 is calculated as a coordinate by calculating the coordinate by the coordinate calculation unit 32 and stored in the storage unit 36 or the data is stored in the main control unit 19. Notification is made (step S13). The coordinate control unit 33 confirms whether the touch panel 21 is in an ON state for a predetermined time or more (step S14). If it is OFF within a certain time, the main control unit 19 is notified of OFF information (step S15), the process proceeds to step S16, the coordinate control unit 33 determines that the touch panel 21 is normal, and operates in a normal flow.

If the touch panel 21 is in the ON state for a predetermined time or longer, the process proceeds to step S17, where the coordinate control unit 33 determines that it is in an abnormal state, causes the display control unit 35 to display the screen of the abnormal state on the screen of the LCD 23, The coordinates of the ON position obtained by the coordinate calculation unit 32 are stored in the storage unit 36.
As shown in FIG. 8A, the operation screen 61 is normally displayed. However, when it is determined that the touch panel 21 is in an abnormal state, the abnormal state is notified as shown in FIG. 8B. A warning screen 62 is displayed.
Further, as shown in FIG. 9, the coordinate control unit 33 causes the display control unit 35 to display a cross key 63 on the screen of the LCD 23 and display a word 64 on the screen to inspect whether it can be used continuously. .

  By having the user press the cross key 63, it is determined whether there is one or more abnormal points (points that are always ON). The touch panel is used by calculating the true input value by performing the correction. On the other hand, if there are a plurality of points, it is displayed that continuous use is not possible, and the user is called a serviceman.

A specific example of abnormality determination is shown below.
It is assumed that the coordinates (x, y) = (20, 10) have always been pressed from the moment of activation. If the touch panel 21 remains on for a few seconds from the activated state, the cross key 63 is displayed at the farthest position on the diagonal of the abnormal position that is always on. In the example in this case, since the upper left continues to be ON, it is displayed at the lower right.
The reason why the cross key 63 is displayed at the farthest position on the diagonal line of the abnormal position is to make it possible to easily and reliably determine the abnormal state by making the display coordinates and the abnormal coordinates of the cross key different from each other as much as possible. Because.

  For example, it is displayed as cross key coordinates (x, y) = (750, 450), and the cross key is pressed by the user to determine whether there is one point or a plurality of points. Since the touch panel is of the resistive film type, when there is one abnormal point, the coordinates of the cross key input by the user should be an intermediate point between the abnormal coordinates and the cross key display position coordinates. Otherwise, there are a plurality of abnormal points and correction is impossible.

Therefore,
・ Abnormal coordinates that are always ON at startup (x, y) = (20, 10)
・ Cross key display position (x, y) = (750,450)
In this case, the input coordinates when the cross key is pressed should be (385, 230). Since the position input by the user is slightly deviated, if the input error range is determined in advance and the input coordinates exist within the range, it can be determined that there is one abnormal point. If it is out of range, it is determined that there are a plurality of abnormal points. Even if there is an input error, there is no problem because the values of the abnormal coordinates and the cross key display coordinates are greatly different.

Based on the above, the description of the flowchart of FIG. 7 will be continued.
The coordinate control unit 33 confirms whether the user has performed an input on the displayed cross key by the input detection unit 31 (step S18). When input is performed, it is confirmed whether or not the input coordinates obtained by the coordinate calculation unit 32 substantially coincide with the intermediate point between the abnormal coordinates and the cross key display coordinates (step S19). The reason why they are almost coincident is that the input error is considered as described above. If they do not coincide with each other, as shown in FIG. 10, the display control unit 35 is caused to display an abnormal screen display 65 indicating that there are a plurality of abnormal points and correction is difficult (step S24). If they match, as shown in FIG. 11, a confirmation screen 66 for continuous input is displayed on the display control unit 35 (step S20), and it is confirmed whether the user has made confirmation input for continuous use (step S21). As shown in FIG. 12, when the confirmation input is not performed, an abnormal state screen 67 is displayed on the display control unit 35 (step S25). In FIG. 12, since the abnormal coordinates 68 are displayed, it is possible for the user to remove foreign matters and return the touch panel 21 to normal.

  When the user inputs confirmation of continuous use, the coordinate control unit 33 causes the display control unit 35 to clear the abnormal screen display, determines the coordinates obtained by the coordinate calculation unit 32, and stores them in the storage unit 36. (Step S22). The coordinate correction unit 34 corrects the input coordinates based on the stored data (step S23).

Next, the correction process in step S23 will be described with reference to FIG.
First, the coordinate control unit 33 confirms whether the touch panel input is turned off (step S31). If it is in the OFF state, it means that the touch panel 21 has returned to the normal state, and the process returns to step 15. In the ON state, when the user presses the touch panel 21 on the main control unit 19 and changes to the input coordinates (step S32), the coordinate control unit 33 determines the coordinate value from the coordinate calculation unit 32 as the input coordinate. Then, it is stored in the storage unit 36 (step S33). The coordinate control unit 33 confirms whether this input coordinate is always pressed, that is, coincides with the coordinates of the abnormal point obtained in step 13 (coordinate data stored in the storage unit 36) (step S34). . If they match, the main control unit 19 is notified of the OFF state (step S37), and the process proceeds to step S36.

  When the abnormal coordinates and the input coordinates do not match, the coordinate correction unit 34 corrects the input coordinates and notifies the main control unit 19 of the corrected coordinates (step S35). Further, it is confirmed whether there is an input and the correction operation is continued (step S36).

The coordinate correction of the coordinate correction unit 34 in step S35 is performed as follows.
In the resistive touch panel, if the panel is pressed down at two points, as described above, the same potential as that at the time of pressing one point at the middle point is detected. For this reason, assuming that an abnormality such as biting occurs at one point, when the abnormal coordinates are (10, 20) and the user input position is (90, 60), the calculated coordinates (X, Y) are X = (10 + 90) / 2 = 50 and Y = (20 + 60) / 2 = 40.
Therefore, if the reverse correction is performed, the true input position can be determined from the detection position. For example, when the always-on position (10, 20) and the input calculation coordinates are (50, 40), the coordinates (X, Y) of the true input position are X = 50 * 2-10 = 90, Y = 40 * 2. −20 = 60.

That is,
User input coordinates (X _I , Y _I ) obtained by the coordinate calculation unit 32
・ Abnormal coordinates (X _A , Y _A )
-True input coordinates corrected by the coordinate correction unit 34 (X, Y)
Then, the correction coordinates (X, Y) can be easily obtained by the following correction formula.

X = X _I * 2-X _A
Y = Y _I * 2-Y _A

  In this way, even when a foreign object bites or the like occurs and an abnormal state that is always input even in the non-input state, the abnormal input of the abnormal input obtained by the coordinate calculation unit 32 and the input coordinates of the user are used. Since it is determined whether the correction by the coordinate correction unit 34 is possible and the correction is possible, the coordinate correction unit 34 corrects the input coordinates. Without being provided, the operable area can be kept large, and the true coordinates of the position touched by the user can be determined even in an abnormal state.

DESCRIPTION OF SYMBOLS 10 MFP 11 Operation panel part 12 Panel control part 13 Scanner part 14 Image processing part 15 Image storage part 16 Paper supply part 17 Recording paper conveyance part 18 Image formation part 19 Main control part 20 External device 21 Touch panel 22 Operation switch 23 LCD
31 Input Detection Unit 32 Coordinate Calculation Unit 33 Coordinate Control Unit 34 Coordinate Correction Unit 35 Display Control Unit 36 Storage Units 37 and 38 CCD
41 Cases 42 and 43 LCD folder 51 Non-operation area 52 Non-operation area 53 Operation area 54 Flexible cable 100 Touch-panel input display device 101 Touch panel 102 Display unit 103 Case 103a Supporting convex part 103b Tip part 104 Non-operation area 105 Foreign object

Claims (6)

In a touch panel type input display device comprising a display unit for displaying an image and a touch panel unit arranged on the front surface thereof to enable contact input,
Input detection means for detecting an input to the touch panel unit and outputting the input value;
Coordinate calculating means for obtaining coordinates of the input position based on the input value;
Coordinate correction means for correcting the input coordinates of the coordinate calculation means to a correct value when the touch panel unit is in an abnormal state that is always input even when no user is input,
The abnormal state of the touch panel unit is determined by the input detection unit, and based on the abnormal coordinates that are the abnormal positions of the normal input obtained by the coordinate calculation unit in the abnormal state, and the input coordinates of the user, A coordinate control unit that determines whether or not correction is possible by the coordinate correction unit, and if the correction is possible, causes the coordinate correction unit to correct the input coordinates;
Equipped with a,
When the touch panel unit is in the abnormal state, the coordinate control unit causes the display unit to display an arbitrary instruction position for instructing an input to the user, and calculates the coordinates of the instruction position and the coordinate calculation unit. A touch panel type input display device characterized in that coordinates of input positions are compared to determine whether or not correction is possible by the coordinate correction means . The touch panel type input display device according to claim 1 , wherein the coordinate control unit sets an arbitrary designated position for instructing an input to a user as a position farthest from an abnormal position. The touch panel unit is a resistive film type,
The coordinate control means determines that the correction by the coordinate correction means is possible if the coordinates of the user input position with respect to the arbitrary designated position are approximately the midpoint between the abnormal coordinates and the coordinates of the designated position. The touch panel type input display device according to claim 1 or 2 . The coordinate correction means includes abnormal coordinates (X _A , Y _A ), user input position coordinates obtained by the coordinate calculation means (X _I , Y _I ), and input coordinates corrected by the coordinate correction means (X , Y)
X = X _I * 2-X _A
Y = Y _I * 2-Y _A
The touch panel type input display device according to claim 3 , wherein the touch panel type input display device is corrected. The touch panel type input according to any one of claims 1 to 4 , wherein the coordinate control means displays, when the coordinate correction is impossible due to an abnormal state of the touch panel unit, to that effect on the display unit. Display device. The coordinate control unit, a touch panel type input display device according abnormalities coordinates the coordinate calculation means is determined to any one of claims 1 to 5, characterized in that to be displayed on the display unit.