JP5615564B2 - Display device - Google Patents

Description

  The present invention relates to a display device that provides a user with an image corresponding to an input operation on a touch panel, and is particularly suitable when applied to a car navigation device.

  In recent years, a left screen that can be viewed from the left side and a right screen that can be viewed from the right side can be simultaneously displayed on the same screen, that is, different screens can be viewed by changing the viewing angle. A display unit having a so-called dual view (registered trademark) function is known. And the display apparatus comprised by having such a display part and the touchscreen arrange | positioned on this display part is known. Further, when a car navigation device is configured using such a display device, for example, a driving guidance map can be displayed for a driver and a DVD image can be displayed for a passenger seat. Can be improved. However, if different images are displayed for the driver and the passenger, whether the touch operation performed on the touch panel is performed on the image displayed on the driver The display device needs to determine whether the image is being displayed on the image displayed to the passenger. In other words, the display device needs to determine whether the touch operation is performed by the driver or the passenger.

  For this reason, Patent Document 1 discloses a display that has a display unit having a dual view function and displays the display so that the display position of the menu button for the driver and the menu button for the passenger seat does not overlap. Yes. In such a display device, the menu button for the driver and the menu button for the passenger seat are displayed differently to determine whether the touch operation is performed by the driver or the passenger seat. Be able to.

  Patent Documents 2 and 3 disclose ones in which infrared sensors, position sensors, and the like are arranged on the left and right sides of the display unit. In such a display device, whether the touch operation is performed by the infrared sensor or the like is detected by an infrared sensor or the like to determine whether the touch operation is performed by a driver or a passenger. Can be determined.

JP 2007-207146 A JP 2007-172373 A JP 2008-120134 A

  However, the display device of Patent Document 1 has a problem in that the arrangement method and the number of menu buttons are limited because the display positions of the driver's menu button and the passenger's menu button are different.

  Furthermore, the display devices of Patent Documents 2 and 3 have to be additionally provided with infrared sensors and the like on the left and right sides of the display device, which increases the number of components and increases the cost.

  In the above description, the case where the display device having the display unit having the dual view function is applied to the car navigation device and the dual view display is performed has been described, but one image is displayed regardless of the line-of-sight direction. In some cases, it may be necessary to determine whether the touch operation is performed by the driver or the passenger. For example, in general, while driving a vehicle, it is desired to make the touch operation of the passenger seat effective while disabling the driver's touch operation in order to achieve both prevention of danger and convenience. Yes. That is, even in such a case, it is necessary to determine whether the touch operation is performed by the driver or the passenger.

  In view of the above points, the present invention allows the touch operation to be performed from either the left or right direction with respect to the touch panel without increasing the number of parts and suppressing the arrangement and number of menu buttons. It is an object of the present invention to provide a display device that can determine whether or not a user has played.

  In order to solve such a problem, the present inventors have used a known resistive touch panel and studied a determination means for determining whether the touch operation has been performed from the left or right direction with respect to the touch panel. .

  Here, the resistive touch panel will be briefly described. In the resistive touch panel, for example, a plate-like first member and a second member are arranged to face each other, and a conductive film is arranged on each facing surface. The conductive film may be provided on one surface of each opposing surface of the first and second members, or may be provided on each opposing surface of the first and second members in a stripe shape. Also good. Moreover, when arrange | positioning a electrically conductive film in stripe form on each opposing surface of a 1st, 2nd member, the electrically conductive film arrange | positioned at a 1st member and the electrically conductive film arrange | positioned at a 2nd member may be orthogonally crossed. Has been placed. And the electrode electrically connected with the electrically conductive film arrange | positioned at the 1st member is arrange | positioned at two opposite sides, for example, X-axis direction both ends of the 1st member, and the 2nd opposite of the 2nd member. Electrodes that are electrically connected to the conductive film disposed on the second member are disposed on the sides, for example, both ends in the Y-axis direction, and are constant from one side to the other side of the two opposite sides. A voltage is applied. Such a resistive film type touch panel is disposed, for example, on a display unit that displays an image including a menu button so that the display unit and the first member face each other with the second member interposed therebetween, and the user can use the first member. When the conductive films disposed on the first and second members are brought into contact with each other by pressing, a detection signal indicating the contacted portion is output.

  For example, when a local point contact operation is performed on the first member with a pen tip or the like while a voltage is applied to the conductive film disposed on the first member, the conductive film disposed on the first member The conductive film disposed on the two members makes point contact with each other to generate contact resistance at the contact point, and the touch panel outputs a detection signal indicating the X coordinate of the contact point through the contact resistance and the electrode disposed on the second member. Similarly, when a local point contact operation is performed on the first member in a state where a voltage is applied to the conductive film disposed on the second member, the touch panel passes through the contact resistance and the electrode disposed on the first member. A detection signal indicating the Y coordinate of the contact point is output. Therefore, the two-dimensional coordinate value of the contact point is calculated from these detection signals.

In addition, when a surface contact operation is performed on the first member with a fingertip or the like while a voltage is applied to the conductive film disposed on the first member, the conductive film disposed on the first member and the second member are disposed. A contact resistance is generated on the entire contact surface due to surface contact with the conductive film. In this case, since a constant voltage is applied from one side to the other side of the conductive film disposed on the first member, the conductive films disposed on the first and second members are simultaneously applied at a plurality of points. The touch panel outputs a detection signal indicating the X coordinate of the center point of the contact surface through the combined resistance of a plurality of contact resistances and the electrode disposed on the second member, as in the case of contact. Similarly, when a surface contact operation is performed on the first member in a state where a voltage is applied to the conductive film disposed on the second member, the touch panel is disposed on the combined resistance of the plurality of contact resistances and the first member. A detection signal indicating the Y coordinate of the center point of the contact surface is output through the electrode. Here, the center point of the contact surface is an intermediate point between the point having the maximum value in the X-axis direction and the point having the minimum value among the contact surfaces, and the point having the maximum value in the Y-axis direction among the contact surfaces. This means the midpoint between the minimum value and the point. (Note that the detection signal output when the conductive films of the first and second members are in contact at a plurality of points at the same time indicates the coordinates of the center point of the contact point, for example, in Japanese Patent Application Laid-Open No. 2008-070963. Have been described)
Using such a touch panel, the present inventors have determined whether the touch surface of the touch panel is touched when the user touches the touch panel with the fingertip from the left side and when the user touches with the fingertip from the right side. We focused on the different shapes. FIG. 3A is a schematic diagram illustrating a contact surface between the fingertip and the touch panel when the touch operation is performed on the touch panel from the left side, and FIG. It is a schematic diagram which shows the contact surface of a fingertip and a touch panel when performing.

  As shown in FIG. 3, when the user performs a touch operation on the touch panel from the left side, the shape of the contact surface becomes a substantially elliptical shape and is inclined from the upper right to the lower left in the drawing. On the other hand, when the user performs a touch operation on the touch panel from the right side, the shape of the contact surface becomes a substantially elliptical shape and is inclined from the upper left to the lower right of the page.

  Further, the present inventors have paid attention to the fact that the shape of the contact surface between the fingertip and the touch panel changes every predetermined period (instant) when the user performs a touch operation on the touch panel with the fingertip. 4A and 4B are schematic diagrams illustrating the shape of the contact surface for each predetermined period of the touch panel, where FIG. 4A illustrates a touch operation performed from the left side of the touch panel, and FIG. 4B illustrates the touch panel. This is when the touch operation is performed from the right side. Hereinafter, a case where the user performs a touch operation on the fingertip from the tip toward the first joint will be described as an example.

  As shown in FIG. 4, when the user performs a touch operation on the touch panel with a fingertip, the contact surface gradually changes and becomes larger every predetermined period. And since the shape of the contact surface of a fingertip and a touch panel changes, the shape of the contact surface of the electrically conductive film arrange | positioned at the 1st, 2nd member also changes for every predetermined period. Specifically, the contact surface between the touch panel and the fingertip is first a contact surface centered on point A, and subsequently a contact surface centered on points B, C, D, and E. The conductive film disposed on the first and second members first becomes a contact surface centered on point A, and subsequently becomes a contact surface centered on points B, C, D, and E. For this reason, as described above, when the conductive films disposed on the first and second members are in surface contact, the touch panel detects a detection signal indicating the center point of the contact surface, for example, detection indicating points A to E. Output a signal.

  Therefore, the present inventors calculate at least two coordinate values from the detection signal output from the touch panel when a touch operation is performed on the touch panel, and calculate the slope of a straight line connecting these two coordinate values. Based on the calculated inclination, it has been found that it is possible to determine whether the touch operation has been performed on the touch panel from the right direction or the left direction. For example, when the calculated inclination is “positive” on the two-dimensional coordinate, it can be determined that a touch operation has been performed on the touch panel from the left side as shown in FIGS. 3 and 4.

  In the above, when the user performs a touch operation on the fingertip from the tip toward the first joint, that is, the user performs a touch operation so that the center point of the contact surface between the touch panel and the fingertip is directed from point A to point E. Although the case has been described, depending on the touch operation of the user, the center point of the contact surface between the touch panel and the fingertip is the point A, C point, E point, D point, B point, or the center point of the contact surface is the E point Or going to point A. Even in this case, if at least two coordinate values are calculated and the inclination of the straight line connecting these two coordinate values is calculated, whether the touch operation has been performed on the touch panel from the right direction based on the calculated inclination. It can be determined whether the touch operation has been performed from the left direction.

For this reason, in the first aspect of the present invention, a display unit (10) for displaying predetermined contents including a plurality of menu buttons, and a plate-like shape disposed on the front surface of the display unit (10) and having two opposite sides. The first member and the plate-like second member having two opposite sides orthogonal to the two opposite sides are arranged to face each other, and conductive films are arranged on the opposing surfaces of the first and second members, respectively. A pair of electrodes that are electrically connected to the conductive film disposed on the first member are disposed on the two opposite sides of the first member, and on the two opposite sides of the second member. Is provided with a pair of electrodes that are electrically connected to the conductive film disposed on the second member, and the user performs a surface contact operation on the first member to change the pressing surface. The detection signal is detected at predetermined intervals by bringing the conductive films arranged on the two members into surface contact. When the detection signal is output from the resistance film type touch panel (11) to be output and the touch panel (11), the coordinate value calculation means for calculating at least two two-dimensional coordinate values from the detection signal, and the coordinate value calculation means There is an inclination calculating means for calculating the inclination of the straight line connecting the two obtained coordinate values, and a surface contact operation is performed on the touch panel (11) from either the left or right direction based on the inclination calculated by the inclination calculating means. Determination means for determining whether the first member and the second member of the two coordinate values are in contact with each other. The coordinate value indicating the detection signal of the contact surface in contact with the first member and the second member after the coordinate value is set as the second coordinate value, and the tilt calculating means calculates the tilt and the x coordinate of the second coordinate value is From the x coordinate of the first coordinate value The direction of the second coordinate value is specified by determining whether or not the touch panel is touched, and the determination means performs surface contact operation from either the left or right direction with respect to the touch panel (11) based on the inclination and the direction of the second coordinate value. It is characterized by determining whether or not there was .

  In such a display device, at least two two-dimensional coordinate values are calculated from the detection signal, the inclination of a straight line connecting these two coordinate values is calculated, and either the left or right direction with respect to the touch panel (11) is calculated from the inclination. It is determined whether there has been a surface contact operation. For this reason, it is possible to determine whether the surface contact operation has been performed from the left or right direction with respect to the touch panel without providing a member such as a new infrared sensor, so that the number of parts does not increase.

  In addition, since the calculated tilt is used to determine whether the surface touch operation has been performed from the left or right direction with respect to the touch panel, the arrangement and number of menu buttons are not limited.

Furthermore, in the invention described in claim 1, in addition to the inclination of the straight line connecting the first and second coordinate values, the direction of the second coordinate value with respect to the first coordinate value is specified, and the touch panel is based on the inclination and the direction. With respect to (11), it is determined whether the surface contact operation has been performed from either the left or right direction. As a result, even when the touch operation is performed on the touch panel from the right side and when the touch operation is performed from the left side, the determination is made based on the inclination and direction, so that erroneous determination is suppressed. can do.

In addition, as in the second aspect of the invention, the determination unit reads the maximum threshold value and the minimum threshold value set for the menu button corresponding to the user's surface contact operation, and the calculated inclination is smaller than the maximum threshold value. And when it is larger than the minimum threshold, it can be determined whether the surface touch operation has been performed on either side of the touch panel (11).

  In such a display device, when the calculated tilt is smaller than the maximum threshold of tilt set in the menu button and larger than the minimum threshold, the touch panel (11) has a surface contact operation from either the left or right direction. I'm trying to determine if it was. That is, when the calculated inclination is larger than the maximum threshold value or smaller than the minimum threshold value, it is not determined whether the surface touch operation has been performed from the left or right direction with respect to the touch panel (11), thereby suppressing erroneous determination. can do.

Further, as in the invention described in claim 3 , the display unit (10) can simultaneously display a left screen that can be viewed from the left side and a right screen that can be viewed from the right side. The included menu button and the menu button included in the right screen can be displayed in an overlapping manner.

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

1 is a block diagram of a car navigation device according to a first embodiment of the present invention. (A) is a figure which shows the display screen displayed on the left side screen, (b) is a figure which shows the display screen displayed on the right side screen. (A) is a schematic diagram showing a contact surface between a fingertip and a touch panel when a touch operation is performed on the touch panel from the left side, and (b) is a fingertip when a touch operation is performed on the touch panel from the right side. It is a schematic diagram which shows a contact surface with a touch panel. (A) is a schematic diagram which shows the shape of the contact surface for every predetermined period when touch operation is performed with respect to a touch panel from the left side, (b) is predetermined when touch operation is performed with respect to a touch panel from the right side. It is a schematic diagram which shows the shape of the contact surface for every period. It is a flowchart which shows the process of a control part.

(First embodiment)
A first embodiment of the present invention will be described. FIG. 1 is a block diagram when the display device of the present invention is applied to a car navigation device, which will be described based on this drawing. Note that the car navigation device of the present embodiment is configured as an in-dash type device that is disposed at an intermediate portion between a driver seat and a passenger seat of an instrument panel in front of the vehicle, for example.

  As shown in FIG. 1, the car navigation device of this embodiment includes a display unit 10, a touch panel 11, a touch input control unit 12, a display control unit 13, a GPS receiver 14, a hard disk device (hereinafter simply referred to as HDD) 15, The multi-disk drive 16, the TV tuner 17, the key input unit 18, the sound processing unit 19, and the control unit 20 are included.

  The display unit 10 displays a video corresponding to the video signal given from the display control unit 13. In this embodiment, the same video display that displays one video regardless of the line-of-sight direction, and the dual view that simultaneously displays the left screen that can be viewed from the left side and the right screen that can be viewed from the right side on the same screen. The display can be switched and displayed.

  Further, the display unit 10 displays a plurality of menu buttons. When the dual view display is performed, the menu button on the left screen and the menu button on the right screen are displayed at the same place. It has become. FIG. 2A shows a display screen of the left screen, and FIG. 2B shows a display screen of the right screen. As shown in FIG. 2, for example, it is assumed that there is a passenger's hand on the left side and a driver on the right side with respect to the touch panel 11, a DVD image is displayed on the left screen, and a driving guidance map is displayed on the right screen. For example, the display unit 10 displays the menu buttons 10a to 10e related to the DVD image and the menu buttons 10f to 10j related to the travel guide map in an overlapping manner. For example, a fast-forward menu button 10d displayed at the lower left of the left screen, for example, and an enlarged display menu button 10i displayed at the lower left of the right screen are displayed in an overlapping manner. In the following, the touch panel 11 will be described as having a passenger seat on the left side and a driver on the right side.

  The touch panel 11 is a known resistive film type disposed on the front surface of the display unit 10, and when a user performs a surface contact operation, for example, a touch operation with a fingertip, a detection signal corresponding to the touch operation is predetermined. Output every period.

  The touch panel 11 is disposed so that the plate-shaped film and the glass substrate face each other, and a conductive film is disposed on the entire surface of each facing surface. And the electrode which is electrically connected with the electrically conductive film arrange | positioned at the film's two opposite sides, for example, X-axis direction both ends, for example, a glass substrate, for example, two opposite sides of a glass substrate, for example, a Y-axis Electrodes that are electrically connected to the conductive film arranged on the glass substrate are arranged at both ends in the direction, and a constant voltage is applied from one side to the other side of the two opposite sides. ing. And it arrange | positions so that the display part 10 and a film may oppose on both sides of the glass substrate in the front surface of the display part 10, and a user touch-operates a film, and each electrically conductive film arrange | positioned on a film and a glass substrate contacts If it is made, the detection signal which shows the part which is contacting is output for every predetermined period.

  FIG. 3A is a schematic diagram illustrating a contact surface between the fingertip and the touch panel 11 when the passenger seat performs a touch operation on the touch panel 11, and FIG. 4 is a schematic diagram illustrating a contact surface between a fingertip and a touch panel 11 when a driver performs a touch operation. FIG. FIG. 4 is a schematic diagram illustrating the shape of the contact surface of the touch panel 11 for each predetermined period. FIG. 4A is a diagram when a passenger on the touch panel 11 performs a touch operation, and FIG. This is when the driver performs a touch operation on the touch panel 11.

  Although the details are as described above, as shown in FIG. 3, when the user performs a touch operation on the touch panel 11 with a fingertip, the driver performs a touch operation, and the front passenger seat performs a touch operation. The shape of the contact surface between the fingertip and the touch panel 11 is different.

  When the user performs a touch operation on the touch panel 11 with a fingertip, the shape of the contact surface between the conductive film disposed on the film and the conductive film disposed on the glass substrate is gradually changed every predetermined period (instant). And grows. Specifically, as shown in FIG. 4, the contact surface between the touch panel and the fingertip is first a contact surface centered on point A, and subsequently centered on points B, C, D, and E. Therefore, the conductive film arranged on the film and the conductive film arranged on the glass substrate first become a contact surface centered on the point A, and then the points B, C, D, and E. It becomes an order to the contact surface centering on. For this reason, the touch panel 11 outputs a detection signal indicating the center point of the contact surface, that is, a detection signal indicating points A to E. That is, the touch panel 11 outputs different detection signals when the passenger seat performs a touch operation on the menu buttons arranged in the same portion and when the driver performs a touch operation. In the present embodiment, the film corresponds to the first member of the present invention, and the glass substrate corresponds to the second member of the present invention.

  When a detection signal is input from the touch panel 11, the touch input control unit 12 calculates at least two two-dimensional coordinate values from the detection signal, and outputs the calculated coordinate values to the control unit 20. In this embodiment, when a detection signal is input from the touch panel 11, the coordinate values of the detection signal are calculated. For example, as shown in FIG. 4A, when the passenger seat performs a touch operation and a detection signal indicating points A to E is input from the touch panel 11, the points A to E are displayed. Each two-dimensional coordinate value is calculated.

  The GPS receiver 14 calculates the exact latitude, longitude, altitude, and current time of the current position based on the incoming radio waves received from the GPS antennas 14a and outputs the calculation result to the control unit 20.

  The HDD 15 stores map data corresponding to position information according to a plurality of scales, and also stores music data created by a multi-disk drive 16 (to be described later) according to user settings. Based on these, the stored contents are read out and output.

  The multi-disc drive 16 is capable of reproducing various discs such as a DVD (Digital Versatile Disc) -Video, a DVD-ROM, a DVD ± R, a music CD (Compact Disc), a CD-ROM, and a CD-R. The reproduction data is output to the control unit 20.

  The TV tuner 17 selects the frequency band of the channel selected by the user from the TV broadcast waves received by the TV antenna 17a, demodulates the TV broadcast program of that channel, and outputs it to the control unit 20.

  The key input unit 18 includes a key switch that is provided in addition to the touch panel 11 and is frequently used, for example, +/− of the volume, and outputs the key operation signal to the control unit 20.

  The audio processing unit 19 converts the audio data of the digital value given from the control unit 20 into an analog signal and drives the speaker 19a to amplify, while digitizing the analog audio signal input from the microphone 19b and then to the control unit 20. Output.

  The control unit 20 is configured by a computer that includes a CPU that performs control calculations and an internal memory that stores operation programs and parameters of the CPU in a fixed manner, and performs various processes according to the programs stored in the internal memory. Do. In the present embodiment, the internal memory has a set value for each menu button 10a to 10j, for example, a set value “slope a to b (a, b> 0), direction negative” for the menu button 10d, menu “Inclination −c to −d (c, d> 0), direction positive” or the like is stored as a default value for the button 10i, and each menu button 10a to 10j includes at least a maximum threshold value and a minimum threshold value. Is set. Further, the control unit 20 is connected to a known gyroscope, a distance sensor, and the like in addition to the GPS receiver 14 and the HDD 15, but the description thereof is omitted here.

  As the processing of the control unit 20, the vehicle position calculation process for calculating the vehicle position based on a signal input from the GPS receiver 14 or the like, the map data around the vehicle position is read from the HDD 15, and the map around the vehicle position is read. There are a map display process in which a vehicle position mark is superimposed and displayed, a video reproduction process in which a DVD video stored in a DVD-ROM is read out and reproduced.

  As will be described in detail later, when the coordinate value is input from the touch input control unit 12, the control unit 20 determines whether or not the driver has performed the touch operation based on the input coordinate value. The determination process is performed.

  Next, processing of the control unit 20 when a touch operation is performed will be described. FIG. 5 is a flowchart showing the processing of the control unit 20. When the ignition switch or the accessory switch is turned on and power is supplied from the battery, the control unit 20 starts processing content related to the touch operation on the touch panel 11 in parallel with processing such as automatic position calculation processing and map display processing. To do. In the following description, it is assumed that the display unit 10 is performing dual view display.

  As shown in FIG. 5, in step 100, it is determined whether or not a touch operation has been performed on the touch panel 11. Specifically, it is determined whether or not a touch operation has been performed by determining whether or not a coordinate value has been input from the touch input control unit 12. If the coordinate value is input, it is determined that the touch operation has been performed, and the process proceeds to step 110. If the coordinate value is not input, it is determined that the touch operation has not been performed, and the touch operation has been performed. This determination step is repeated until there is.

  In step 110, it is determined from the input coordinate value which part of the display unit 10 has been touched with respect to the menu button displayed, and the process proceeds to step 120. For example, as shown in FIG. 2, when the passenger seat touches the menu button 10d or the driver touches the menu button 10i, the display unit 10 performs dual view display. It is specified that a touch operation has been performed on any of the menu buttons 10d and 10i.

  Subsequently, in step 120, first, two coordinate values are selected from the input coordinate values. In the present embodiment, the coordinate value of the center point (point A) of the contact surface where the user's fingertip first contacts the touch panel 11 is set as the first coordinate value, and the furthest away from the first coordinate value among the input coordinate values. The coordinate value of the point (point E) is selected as the second coordinate value. Then, after selecting the first and second coordinate values, the inclination of the straight line connecting the first and second coordinate values is calculated, and whether or not the x coordinate of the second coordinate value is larger than the x coordinate of the first coordinate value. By determining whether or not the direction of the second coordinate value is specified, the process proceeds to step 130. In this embodiment, when the x coordinate of the second coordinate value is larger than the x coordinate of the first coordinate value, the direction is “positive”, and when the x coordinate of the second coordinate value is smaller than the x coordinate of the first coordinate value. The direction of the second coordinate value is specified by setting the direction to “negative”. For example, as shown in FIG. 4A, when the passenger seats a touch operation, the x coordinate of the second coordinate value is smaller than the x coordinate of the first coordinate value, so the direction is negative. Is identified.

  Thereafter, in step 130, the setting value corresponding to the menu button specified in step 110 is read from the internal memory, and it is determined whether or not the inclination calculated in step 120 and the specified direction are within the range of the setting value. For example, if the display unit 10 performs dual view display and it is determined in step 110 that the touch operation has been performed on any of the menu buttons 10d and 10i, the setting value of the menu button 10d “Inclination a to b, direction negative” and setting value “Inclination −c to −d, direction positive” of the menu button 10i are read. For example, when the calculated inclination is e (a <e <b) and the direction of the second coordinate value is negative, it is within the range of the set value “inclination ab, direction negative”. Go to 140. In step 130, when the calculated inclination and the specified direction are within the set value range, it is also specified which of the menu buttons 10d and 10i is touched. As described above, when the calculated inclination is e (a <e <b) and the specified direction is negative, the touch operation is performed on the left screen because it is within the set value range of the menu button 10d. Specified against made. In other words, it is specified that the passenger has performed a touch operation. Further, when it is determined that the calculated inclination and the specified direction are out of the set value range, for example, “inclination g (b <g)” or “inclination e (a <e <b), direction positive ”Return to Step 100.

  In step 140, when the tilt and direction are within the set value range in step 130, it is specified whether the touch operation is performed on the left screen or the right screen, that is, the touch operation is performed. Since it is specified whether the driver is a driver or a passenger seat, if the touch operator is a driver based on the determination result, the process proceeds to step 150. In step 150, control corresponding to the contents of the menu button included in the driver's screen contents is executed, and the process returns to step 100 to prepare for the next touch operation. If it is determined in step 150 that the touch operator is not a driver, the operator is a passenger seat, so the process proceeds to step 160, and the content of the menu button included in the screen content of the passenger seat is handled. Control is executed, and the process returns to step 100 again to prepare for the next touch operation.

  In the present embodiment, the touch input control unit 12 corresponds to the coordinate value calculation means of the present invention, step 120 corresponds to the inclination calculation means, and steps 130 and 140 correspond to the determination means.

  In such a display device, the first and second coordinate values are calculated from the detection signal output from the touch panel 11, the inclination of the straight line connecting these coordinate values is calculated, the direction of the second coordinate value is specified, It is determined whether or not the driver has performed the touch operation on the touch panel 11 from the inclination and direction.

  For this reason, when performing dual view display, the menu buttons 10a to 10e displayed on the left screen (passenger seat screen) and the menu buttons 10f to 10j displayed on the right screen (driver screen) are overlapped. It is possible to suppress the arrangement and number of menu buttons from being limited.

  Further, since it is possible to determine whether or not the driver has performed the touch operation without newly providing an infrared sensor or the like, the number of components is not increased.

  Furthermore, in this embodiment, in addition to the slope of the straight line connecting the first and second coordinate values, the direction of the second coordinate is specified, and the direction of the second coordinate is also determined. Thereby, for example, when the menu button is arranged at the lower center of the screen, the value of the inclination is near zero when the driver performs a touch operation and when the passenger seats the touch operation. However, it is possible to suppress erroneous determination by adding the direction of the second coordinate value to the determination element. That is, if the driver and the passenger are both touching the touch panel 11 from the tip of the fingertip toward the first joint, the direction of the second coordinate value is positive when the driver performs a touch operation. When the passenger seat performs a touch operation, the direction of the second coordinate value is negative, and the direction of the second coordinate value is reversed. As described above, malfunctions can be suppressed by determining the direction of the second coordinate value in addition to the slope of the straight line connecting the first and second coordinate values.

  Further, the setting value corresponding to the specified menu button is read from the internal memory, and the control of the specified menu button is executed when the calculated inclination and the specified direction are within the range of the setting value. That is, when the calculated inclination and the specified direction are out of the set value range, the control of the specified menu button is not executed, so that malfunction can be suppressed.

(Other embodiments)
In the first embodiment, the example in which the driver is present on the right side and the passenger seat is present on the left side of the touch panel 11 has been described. Of course, the driver is present on the left side and the passenger seat is present on the right side. You can also.

  In the first embodiment, when a set value is set for each menu button 10a to 10j and the inclination and direction are within the range of the set value, whether or not the touch operation is performed by the driver. However, the setting value is not set to each of the menu buttons 10a to 10j. For example, when the calculated inclination is positive and the specified direction is negative, the front passenger performs a touch operation. It is also possible to determine that the driver has performed a touch operation when the calculated inclination is negative and the specified direction is positive.

  Furthermore, in the first embodiment, the example in which the setting values for the menu buttons 10a to 10j are set as the default values in the control unit 20 has been described. However, the setting values may be appropriately changed by the user. Good. For example, depending on the user's habit, it may be possible to perform a touch operation from point E to point A in FIG. 3, so the setting value of the menu button 10d is set to “tilt ab, direction positive” The setting value of the menu button 10i may be “tilt −c to −d, direction negative”.

  Moreover, in the said 1st Embodiment, although the control part 20 was made to determine whether surface contact operation was performed from which direction on either side with respect to the touchscreen 11 based on the calculated inclination and the specified direction. For example, it may be determined whether the surface contact operation has been performed from the left or right direction with respect to the touch panel 11 using only the calculated inclination.

  Furthermore, in the first embodiment, the processing of the control unit 20 when there is a touch operation during dual view display has been described. However, the same video display that displays one video regardless of the line-of-sight direction is performed. Of course, it is possible to apply the present invention in such a case. That is, for example, before step 140, it is determined whether or not the vehicle is traveling based on a signal from a speed sensor or the like. If the vehicle is traveling, the driver who performed the touch operation in step 140 is the driver. If it is determined that the driver is not the driver, that is, the passenger is the front passenger, the menu button is only displayed in step 160. A control operation corresponding to the contents of the above may be executed. In the case of such a display device, it is possible to provide a display device in which a passenger can perform a touch operation while ensuring the safety of a driving driver. Of course, when performing dual view display, it goes without saying that the step of determining whether or not the vehicle is traveling can be performed.

  Furthermore, although the touch input control part 12 demonstrated the example which calculates the detection signal input from the touch panel 11 to each coordinate value in the said 1st Embodiment, for example, the contact surface with which the user's fingertip first contacted was demonstrated. The coordinate value of the center point (point A) (the coordinate value of the detection signal input first) and the coordinate value of the center point (point E) of the contact surface with which the user's fingertip last touched (the last input detection) Only the coordinate value of the signal) may be calculated, and only these two coordinate values may be output to the control unit 20. This is because when there is a touch operation on the touch panel 11, if there are at least two coordinate values, the inclination can be calculated and the direction can be specified.

DESCRIPTION OF SYMBOLS 10 Display part 11 Touch panel 12 Touch input control part 13 Display control part 14 GPS receiver 15 HDD
16 Multi-disc drive 17 TV tuner 18 Key input unit 19 Audio processing unit 20 Control unit

Claims (3)

A display unit (10) for displaying predetermined contents including a plurality of menu buttons;
A plate-like first member disposed on the front surface of the display unit (10) and having two opposite sides is opposed to a plate-like second member having two opposite sides orthogonal to the opposite two sides. The conductive film is disposed on the opposing surfaces of the first and second members, and the conductive film disposed on the first member is electrically connected to two opposite sides of the first member. A pair of electrodes connected to the second member is disposed, and a pair of electrodes electrically connected to the conductive film disposed on the second member are disposed on two opposite sides of the second member. In addition, when the user performs a surface contact operation with a pressing surface changing on the first member and the conductive film disposed on the first and second members is brought into surface contact, a detection signal is output every predetermined period. A resistive touch panel (11) for output;
When the detection signal is output from the touch panel (11), coordinate value calculation means for calculating at least two two-dimensional coordinate values from the detection signal;
An inclination calculating means for calculating an inclination of a straight line connecting two coordinate values obtained by the coordinate value calculating means;
Determination means for determining whether a surface contact operation has been performed on either side of the touch panel (11) based on the inclination calculated by the inclination calculating means ;
Of the two coordinate values, a coordinate value indicating a detection signal of a contact surface where the first member and the second member have previously contacted is defined as a first coordinate value, and the first member is subsequent to the first coordinate value. And a coordinate value indicating a detection signal of a contact surface in contact with the second member as a second coordinate value,
The tilt calculating means calculates the tilt and determines the direction of the second coordinate value by determining whether the x coordinate of the second coordinate value is larger than the x coordinate of the first coordinate value. ,
The display device according to claim 1, wherein the display unit determines whether a surface contact operation has been performed on either side of the touch panel (11) based on the tilt and the direction of the second coordinate value . The determination unit reads the maximum threshold value and the minimum threshold value set in the menu button corresponding to the user's surface contact operation, and the calculated inclination is smaller than the maximum threshold value and larger than the minimum threshold value. The display device according to claim 1, wherein it is determined whether a surface contact operation has been performed on either side of the touch panel (11). The display unit (10) can simultaneously display a left screen that can be viewed from the left side and a right screen that can be viewed from the right side. The menu button included in the left screen, and the right side the display device according to claim 1 or 2, characterized in that displayed overlapping the menu button included in the screen.

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