JP7657677B2 - Touch operation detection device, display control device, display unit, and touch operation detection method - Google Patents

Description

The present invention relates to a touch operation detection device, a display control device, a display unit, and a touch operation detection method.

Touch panels are used in many display devices.

On the other hand, a display screen constructed using organic EL elements or the like can suffer from what is known as burn-in. A wobbling process is known as a process for suppressing burn-in. In the wobbling process, the display position of the image displayed on the display screen is shifted (for example, moved along a figure-of-eight path over time) to suppress burn-in.

JP 2016-74521 A

Because the display position of an image on a display screen shifts due to the wobbling process, care must be taken when combining the wobbling process with a touch panel. For example, consider a case where a control unit sends a video signal to a display unit so that a button icon is displayed at a first position. In this case, the display position of the button icon may shift to a second position due to the wobbling process performed by the display unit. At this time, it is expected that the user will perform a touch operation at the second position, but the touch position (second position) recognized by the control unit is different from the first position. As a result, the user may not be able to perform the touch operation he or she intended.

The present invention aims to provide a touch operation detection device, a display control device, a display unit, and a touch operation detection method that contribute to realizing accurate touch operations while involving wobbling processing.

The touch operation detection device according to the present invention includes a shift information acquisition unit that acquires, from a display unit having a display screen and capable of executing a wobbling process for moving the display position of an image displayed on the display screen, information on a shift of the display position caused by the wobbling process, and a touch position correction unit that corrects a touch position on a touch panel formed including the display screen using the shift information.

The display unit according to the present invention is configured by modularizing a display screen that displays an image based on a supplied video signal and a processing unit that performs a wobbling process to move the display position of the image displayed on the display screen, and includes an interface unit for outputting information about the shift of the display position caused by the wobbling process to the outside.

The present invention makes it possible to provide a touch operation detection device, a display control device, a display unit, and a touch operation detection method that contribute to realizing accurate touch operations while also involving wobbling processing.

1 is an overall configuration diagram of a display device according to an embodiment of the present invention; 1 is an external perspective view of a display device according to an embodiment of the present invention; FIG. 4 is a diagram illustrating the relationship between the X-axis, the Y-axis, and a display screen according to the embodiment of the present invention. 1 is a configuration diagram of a touch panel according to an embodiment of the present invention. 5A to 5C are explanatory diagrams of a wobbling process according to an embodiment of the present invention. 5A to 5C are explanatory diagrams of a wobbling process according to an embodiment of the present invention. 5A and 5B are explanatory diagrams of a movement amount (shift amount) due to a wobbling process according to an embodiment of the present invention. FIG. 4 is an explanatory diagram of a communication interface between a control unit and a display unit according to an embodiment of the present invention. 11A to 11C are diagrams showing a shift state of the display position of a button icon accompanying a wobbling process according to an embodiment of the present invention. 4 is a flowchart showing an operation of the display device with respect to a touch operation according to the embodiment of the present invention. 11 is an explanatory diagram of a press determination region set by a control unit according to an embodiment of the present invention. FIG.

Below, examples of embodiments of the present invention will be described in detail with reference to the drawings. In each of the drawings referred to, the same parts are given the same reference numerals, and duplicated explanations of the same parts will be omitted as a general rule. In this specification, for the sake of simplicity, a symbol or code referring to information, a signal, a physical quantity, a member, etc. may be written, and the name of the information, signal, physical quantity, member, etc. corresponding to the symbol or code may be omitted or abbreviated.

Figure 1 shows a configuration block diagram of a display device 1 according to an embodiment of the present invention. Figure 2 shows an external perspective view of the display device 1. The display device 1 includes a control unit 10 and a display unit 20. The control unit 10 and the display unit 20 are connected to each other via a communication line that conforms to a predetermined communication standard.

The control unit 10 is composed of a microcomputer, a video IC, which is an integrated circuit suitable for video signal processing, and a communications interface. IC is an abbreviation for "Integrated Circuit." Figure 1 shows functional blocks 11 to 16 realized by the microcomputer, the video IC, and the communications interface. That is, the control unit 10 includes a video signal output unit 11, a receiving unit 12, a receiving unit 13, a correction unit 14, a response processing unit 15, and a press determination unit 16. The press determination unit 16 is provided in the response processing unit 15.

The display unit 20 includes an ASIC (Application Specific Integrated Circuit) 21, a display screen 22, and a touch sensor 23. The control unit 10 and the display unit 20 are housed in a common housing, and the display screen 22 is provided in the housing at a position that is easily visible to a user of the display device 1 (hereinafter simply referred to as the user). In the following description, "display" refers to a display on the display screen 22, unless otherwise specified.

In the display screen 22, a plurality of pixels are arranged in a matrix in the horizontal and vertical directions. With reference to FIG. 3, the mutually orthogonal X-axis and Y-axis are defined. A plane parallel to the X-axis and Y-axis is sometimes called the XY plane. The X-axis and Y-axis are parallel to the display screen 22. The X-axis is parallel to the horizontal direction of the display screen 22, and the Y-axis is parallel to the vertical direction of the display screen 22. The display screen 22 has a rectangular shape, and the origin O of the XY plane is taken at one vertex of the rectangle in the shape of the display screen 22. An arbitrary position 610 on the display screen 22 is represented by (x, y). In (x, y), x is the X-axis coordinate value of the position 610, and y is the Y-axis coordinate value of the position 610. At the origin O, (x, y) = (0, 0). If the position 610 is located on the positive side of the X-axis as viewed from the origin O, the X-axis coordinate value of the position 610 has a positive value. If position 610 is located on the positive side of the Y axis when viewed from origin O, the Y-axis coordinate value of position 610 has a positive value. The X-axis, Y-axis, and coordinate values have been defined with a focus on display screen 22, but the X-axis, Y-axis, and coordinate values are also defined for two-dimensional images (including target images, described below) generated or recognized by control unit 10 in the same manner as for display screen 22.

A touch panel is configured in the display unit 20. FIG. 4 is a configuration diagram of the touch panel. The touch panel in the display unit 20 is configured with a display screen 22, a touch detection body 23a, and a touch detection IC 23b. The touch detection body 23a and the touch detection IC 23b are components of the touch sensor 23 in FIG. 1.

The touch detection body 23a has a plurality of electrodes arranged in a matrix. The touch detection body 23a is a plate-shaped component parallel to the XY plane. On the XY plane, like the display screen 22, the touch detection body 23a has a rectangular shape and has approximately the same size as the display screen 22. The touch detection body 23a is disposed facing the display screen 22 and adjacent to the display screen 22. Each electrode in the touch detection body 23a is formed of a transparent electrode and is disposed, for example, on the surface of a glass plate. The user can bring a finger close to the touch detection body 23 or touch the touch detection body 23 with a finger. In this embodiment, "finger" refers to the user's finger.

When a user brings a finger close to or touches a position on the touch detection body 23a, a capacitance between multiple electrodes arranged at positions corresponding to the finger changes, and this capacitance change is detected by the touch detection IC 23b to detect the touch position. The touch position is the position on the touch detection body 23a where the finger is brought close to or touched. The touch position is detected as a position on the XY plane, and the X-axis and Y-axis coordinate values of the touch position are represented by xT and _{yT ,} respectively.

An operation performed by a user on the touch panel is called a touch operation. When a touch operation is performed, touch position information indicating a touch position ( _xT , _yT ) is generated by the touch sensor 23. Although an operation of bringing a finger close to the touch panel can also be considered as a touch operation, in the following, a touch operation is defined as an operation of bringing a finger into contact with the touch panel. A touch operation can also be said to be an operation of bringing a finger into contact with the display screen 22 or the touch detection body 23a.

Each part in FIG. 1 will be explained. The video signal output unit 11 generates a video signal VS of an image to be displayed on the display screen 22, and outputs (transmits) the generated video signal VS to the display unit 20. For convenience, a two-dimensional image generated or recognized by the control unit 10 (video signal output unit 11) as an image to be displayed on the display screen 22 will be referred to as a target image below. For example, the video signal output unit 11 transmits the video signal VS of the target image to the display unit 20 by LVDS (Low Voltage Differential Signaling). However, the method of transmitting the video signal VS is arbitrary.

The ASIC 21 drives the display screen 22 based on the video signal VS received from the video signal output unit 11, thereby displaying the target image on the display screen 22. The display screen 22 is an organic EL panel formed by arranging pixels, each of which has an organic EL element (organic electroluminescence element), in a matrix. The organic EL element is an electro-optical element whose brightness is controlled by the current flowing through it. The ASIC 21 controls the organic EL element of each pixel to emit or not emit light, thereby displaying the target image on the display screen 22.

The display screen 22, which is constructed using organic EL elements, may suffer from so-called burn-in. The ASIC 21 has a wobbling function as a function for reducing burn-in. In the wobbling function, a wobbling process is executed to move the display position of the image displayed on the display screen 22 over time. The ASIC 21 includes a wobbling processing unit (not shown) that performs the wobbling process. The movement of the display position by the wobbling process is a movement that does not depend on the video signal VS. In other words, when the wobbling process is executed, the display position of the image displayed on the display screen 22 moves over time even if the video signal VS supplied to the display unit 20 is unchanged. Note that, with regard to the wobbling process, the movement of the display position and the shift of the display position are synonymous with each other.

A specific example of the wobbling process will be described with reference to Figs. 5 and 6. It is assumed that the target image represented by the video signal VS is unchanged and that a rectangular image Iref is included at a predetermined position within the target image. The image Iref has an image size sufficiently smaller than the entire display area DR _W of the display screen 22. Under this assumption, the ASIC 21 uses the wobbling process to continuously and repeatedly move (shift) the display position of the image Iref along a predetermined trajectory with time, centered on a predetermined position of the display area DR _W. In the examples of Figs. 5 and 6, the predetermined trajectory is a trajectory along an Arabic numeral 8, but the predetermined trajectory can be changed arbitrarily. The movement of the display position of the image Iref may have a constant period. The wobbling process causes the display position of the center of the image Iref to fluctuate by a predetermined wobbling width in each of the X-axis direction and the Y-axis direction. The wobbling width is set to a width that does not cause the user to feel excessive discomfort. The wobbling width may be a width in pixels on the display region DR- _W (a width in units of the size of one pixel in the X-axis or Y-axis direction), for example, a width of several pixels or a width of 10 pixels.

For ease of explanation, Figures 5 and 6 show the movement of the display position of a rectangular image Iref that corresponds to a portion of the target image. However, in the wobbling process, the display position of the entire target image is moved continuously and repeatedly along a predetermined trajectory over time.

Regarding the shift amount (movement amount) of the display position of the target image by the wobbling process, the X-axis component of the shift amount is represented by the symbol " _xS " and the Y-axis component of the shift amount is represented by the symbol " _yS " (see FIG. 7). The shift amounts _xS and _yS are distance amounts in units of pixels of the display screen 22. When the center position of the target image (the center of the display position of the target image) on the display screen 22 is shifted (moved) to the positive side of the X-axis by the wobbling process, it is assumed that " _xS >0" and when it is shifted (moved) to the negative side of the X-axis, it is assumed that " _xS <0". Similarly, when the center position of the target image (the center of the display position of the target image) on the display screen 22 is shifted (moved) to the positive side of the Y-axis by the wobbling process, it is assumed that " _yS >0" and when it is shifted (moved) to the negative side of the Y-axis, it is assumed that " _yS <0". Information representing the X-axis component and the Y-axis component of the shift amount is called shift information and is represented by ( _xS , _yS ).

The display unit 20 is a unit (device) configured by modularizing the ASIC 21, the display screen 22, and the touch sensor 23. That is, the display unit 20 is configured by integrating the ASIC 21, the display screen 22, and the touch sensor 23 together. The modularized display unit 20 itself executes the wobbling process, and the shift amounts _xS and _yS at each time are determined by the ASIC 21. The control unit 10 cannot control the shift amounts _xS and _yS at each time.

In a general display device including a modularized display unit (different from the display device 1, hereinafter referred to as a reference display device), the control unit does not have a means for recognizing information on the shift in display position due to the wobbling process. In this case, when the reference display device receives a touch operation including a button icon in a display image, the control unit may determine that the button icon has not been pressed, even though the user has performed a touch operation to press the displayed button icon. More specifically, for example, in the reference display device, when the control unit generates a video signal to display the button icon centered on position (100, 100), the button icon may be displayed centered on position (105, 105) due to the wobbling process. At this time, it is expected that the user will press position (105, 105) with his/her finger. However, when the user presses position (105, 105) with his/her finger and the control unit obtains touch position (105, 105), the control unit may determine that the button icon has not been pressed, or that another button icon has been pressed.

Considering such circumstances, in the display device 1 according to this embodiment, the display unit 20 is provided with an interface unit for outputting the shift information ( _xS , _yS ) to the outside. The interface unit may be an interface conforming to any given communication standard, and here is an interface unit _IF20 based on SPI (Serial Peripheral Interface) as shown in FIG. 8. An interface unit IF10 connected to the interface unit _IF20 provided in the display unit ₂₀ is provided in the control unit 10. Any information including the shift information ( _xS , _yS ) can be transmitted and received between the control unit 10 and the display unit ₂₀ through the interface units _IF10 and IF20 by SPI communication.

In the display unit 20, various information such as error information (information on the occurrence or non-occurrence of an error in the display unit 20) and temperature information (information on the temperature in the display unit 20) are generated. In order to transmit the various information from the display unit 20 to the control unit 10, the interface units IF ₁₀ and IF ₂₀ are used. In addition, the interface units IF ₁₀ and IF ₂₀ are also used to transmit various control information from the control unit 10 to the display unit 20. These interface units IF ₁₀ and IF ₂₀ are used to transmit shift information ( _xS , _yS ) from the display unit 20 to the control unit 10. In detail, the shift information ( _xS , _yS ) is generated by the ASIC 21 that performs the wobbling process, and the shift information ( _xS , yS) is transmitted from the _ASIC 21 to the control unit 10 through the interface unit IF _20. Note that the interface units are omitted from FIG. 1.

Referring again to FIG. 1 , the touch sensor 23 detects a touch position ( _xT , _yT ) in response to a touch _operation by a user on the touch panel, and generates touch position information indicating the touch position ( _xT , _yT ). Hereinafter, the touch position information indicating the touch position ( _xT , yT) may be referred to as touch position information (xT, _yT ). The touch position information _{( xT} , _yT ) is output (transmitted) from the display unit 20 to the control unit 10. The transmission of the touch position information ( _xT , _yT ) from the display unit 20 to the control unit 10 may also be performed through the interface units _IF10 and _IF20 based on the SPI. However, the touch position information ( _xT , _yT ) may be transmitted from the display unit 20 to the control unit 10 without using the interface units _IF10 and _IF20 based on the SPI.

The receiving unit 12 acquires the shift information ( _xS , _yS ) by receiving the shift information ( _xS , _yS ) from the display unit 20 (ASIC 21). The receiving unit 12 may be called a shift information acquisition unit or a shift information receiving unit. The receiving unit 12 acquires the shift information ( _xS , _yS ) through the interface unit _IF10 (see FIG. 8). Alternatively, the receiving unit 12 may be considered to be a part of the components of the interface unit _IF10 .

The receiving unit 13 acquires touch position information ( _xT , _yT ) by receiving the touch position information ( _xT , _yT ) from the display unit 20 (touch sensor 23). The receiving unit 13 may be referred to as a touch position information acquisition unit or a touch position information receiving unit. The receiving unit 13 may acquire the touch position information ( _xT , _yT ) through the interface unit _IF10 (see FIG. 8). The receiving unit 13 may be considered to be a part of the components of the interface unit _IF10 .

The correction unit 14 functions as a touch position correction unit. The shift information ( _xS , yS) received and acquired by the receiving unit 12 and the touch position information ( _xT , _yT ) received and acquired by the receiving unit 13 are input to _the correction unit 14. The correction unit 14 generates information indicating the corrected touch position by correcting the touch position ( _xT , _yT ) with the shift information ( _xS , _yS ). The X-axis coordinate value and the Y-axis coordinate value of the corrected touch position are represented by _xC and _yC , respectively, and the corrected touch position is represented by ( _xC , _yC ) below. The correction unit 14 obtains the corrected touch position ( _xC , _yC ) so that " _xC = _xT - _xS " and " _yC = _yT - _yS " are satisfied. The corrected touch position (x _C , y _C ) corresponds to the touch position (x _T , y _T ) corrected by the shift of the display position of the target image due to the wobbling process.

The response processing unit 15 executes a predetermined response process in response to a touch operation on the touch panel based on the corrected touch position ( _xC , _yC ). One type of touch operation is an operation of pressing a predetermined object displayed on the display screen 22 with a finger. The pressing determination unit 16 determines whether or not a touch operation of pressing a predetermined object displayed on the display screen 22 with a finger has been performed based on the corrected touch position ( _xC , _yC ).

A specific example of the operation of the response processing unit 15 and the press determination unit 16 will be given with reference to FIG. 9. Here, it is considered that the display device 1 is a display device incorporated in a car navigation system in a vehicle such as an automobile. Also, consider a situation in which a target image 650 is displayed on the display screen 22. The target image 650 is an image that asks the user whether to set ABC Zoo as the vehicle's destination. The target image 650 includes a character string 660 saying "Do you want to set ABC Zoo as the destination?", a button icon 670 with the characters "OK" written on it, and a button icon 680 with the characters "Cancel" written on it. Each of the button icons 670 and 680 is a button-shaped object.

The user communicates to the control unit 10 that he/she agrees to set ABC Zoo as the destination by performing a touch operation of pressing a button icon 670 displayed on the display screen 22. The user communicates to the control unit 10 that he/she does not agree to set ABC Zoo as the destination by performing a touch operation of pressing a button icon 680 displayed on the display screen 22.

Each of the button icons 670 and 680 is a rectangular image having two sides parallel to the X-axis and two sides parallel to the Y-axis. Therefore, each button icon is a rectangular image having four vertices. In each button icon, the vertex closest to the origin O is called the first vertex, and the vertex farthest from the origin O is called the second vertex. In the target image 650 generated by the control unit 10, the positions of the first vertex and the second vertex in the button icon 670 are represented by ( _x1 , _y1 ) and ( _x2 , _y2 ), respectively. In the target image 650 generated by the control unit 10, the positions of the first vertex and the second vertex in the button icon 680 are represented by ( _x3 , _y3 ) and ( _x4 , _y4 ), respectively. The relations " _x1 < _x2 < _x3 < _x4 ", " _y1 < _y2 ", and " _y3 < _y4 " are satisfied.

The video signal output unit 11 generates a video signal VS of the target image 650 and transmits it to the ASIC 21 in order to display the target image 650 on the display screen 22. When the timing is ( _xS , _yS )=(0,0), the display positions of the first vertex and the second vertex of the button icon 670 are ( _x1 , _y1 ) and ( _x2 , _y2 ), respectively, on the display screen 22, and the display positions of the first vertex and the second vertex of the button icon 680 are ( _x3 , _y3 ) and ( _x4 , _y4 ), respectively. When the shift amounts _xS and _yS are not zero due to the wobbling process, the display positions of the button icons 670 and 680 shift compared to when ( _xS , _yS )=(0,0) (the character string 660 shifts in the same manner).

Specifically, on the display screen 22, the display positions of the first vertex and the second vertex in the button icon 670 are represented by ( _x1 + _xS , _y1 + _yS ) and ( _x2 + _xS , _y2 + _yS ), respectively, and the display positions of the first vertex and the second vertex in the button icon 680 are represented by ( _x3 + _xS , _y3 + _yS ) and ( _x4 + _xS , _y4 + _yS ), respectively.

The flow of operations of the display device 1 when the target image 650 is displayed will be described with reference to FIG. 10. In step S11, the video signal output unit 11 generates a video signal VS of the target image 650 and transmits the video signal VS to the ASIC 21 to start displaying the target image 650 on the display screen 22. This display is assumed to continue at least until immediately before step S16, which will be described later.

In step S12 following step S11, the control unit 10 accepts input of a touch operation by the user. The process of step S12 is repeated until a touch operation is input (N in step S12), and when a touch operation is input (Y in step S12), the _process proceeds to step S13. In step S13, the touch position information (xT, _yT ) from the touch sensor 23 is received and acquired by the receiving unit 13, and the shift information ( _xS , _yS ) from the ASIC 21 is received and acquired by the receiving unit 12.

For example, when touch position information ( _xT , _yT ) is received by the receiving unit 13 based on the input of a touch operation, the control unit 10 may request the ASIC 21 to transmit current shift information ( _xS , _yS ) by SPI communication. In response to this request, the shift information (xS, _yS ) may be transmitted from the display unit 20. Alternatively, the shift information ( _xS , _yS ) may be periodically transmitted from the display unit 20 to the control unit 10. Furthermore, the shift _information ( _xS , _yS ) may be transmitted from the display unit 20 to the control unit 10 every time the contents of the shift information ( _xS , _yS ) change. In any case, in step S13, the current shift information ( _xS , _yS ) may be acquired by the control unit 10 (receiving unit 12).

After step S13, the process proceeds to step S14. In step S14, the correction unit 14 derives a corrected touch position ( _xC , _yC ) based on the touch position information ( _xT , yT) and shift information ( _xS , _yS ) acquired in step _S13 .

In the following step S15, the press determination unit 16 determines whether or not a touch operation has been performed on the button icon 670 and whether or not a touch operation has been performed on the button icon 680, based on the corrected touch position ( _xC , _yC ) derived in step S14. The touch operation on the button icon 670 is a touch operation of pressing the button icon 670 on the display screen 22 with a finger. The touch operation on the button icon 680 is a touch operation of pressing the button icon 680 on the display screen 22 with a finger.

When generating the video signal VS of the target image 650, the control unit 10 sets a press judgment area for each button icon. An area setting section (not shown) that sets the press judgment area is provided within the control unit 10. The area setting section may be understood as being included as a component of the video signal output section 11, or as being a functional block that is included in the control unit 10 separately from the functional blocks 11 to 16.

11 shows an example of a pressing judgment area 670P for the button icon 670 and a pressing judgment area 680P for the button icon 680. The pressing judgment area 670P is an area based on the position of the button icon 670 in the target image 650 generated by the control unit 10. For example, the pressing judgment area 670P is the same as the arrangement area of the button icon 670 in the target image 650 generated by the control unit 10. In this case, the pressing judgment area 670P is a rectangular area having positions (x ₁ , y ₁ ) and (x ₂ , y ₂ ) as both ends of a diagonal line. Similarly, the pressing judgment area 680P is an area based on the position of the button icon 680 in the target image 650 generated by the control unit 10. For example, the pressing judgment area 680P is the same as the arrangement area of the button icon 680 in the target image 650 generated by the control unit 10. In this case, the press determination region 680P is a rectangular region having positions (x ₃ , y ₃ ) and (x ₄ , y ₄ ) as both ends of a diagonal line.

In step S15, the press judgment unit 16 judges whether the corrected touch position ( _xC , _yC ) belongs to either the press judgment region 670P or 680P. If the corrected touch position ( _xC , _yC ) belongs to the press judgment region 670P, the press judgment unit 16 judges that a touch operation has been performed on the button icon 670, and outputs a first press judgment signal. If the corrected touch position ( _xC , _yC ) belongs to the press judgment region 680P, the press judgment unit 16 judges that a touch operation has been performed on the button icon 680, and outputs a second press judgment signal. If the corrected touch position ( _xC , _yC ) does not belong to either the press judgment region 670P or 680P, the press judgment unit 16 does not output either the first press judgment signal or the second press judgment signal.

In step S16 following step S15, the response processing unit 15 executes a response process according to the judgment result of the press judgment unit 16. If the press judgment unit 16 outputs a first press judgment signal, the response processing unit 15 executes a first response process, and if the press judgment unit 16 outputs a second press judgment signal, the response processing unit 15 executes a second response process. If neither the first press judgment signal nor the second press judgment signal is output from the press judgment unit 16, the process may return to step S12.

In the first response process, the response processing unit 15 sets ABC Zoo as the destination of the vehicle and provides driving guidance to guide the vehicle to ABC Zoo. In the driving guidance, for example, a target image showing a driving route to ABC Zoo is generated and displayed on the display screen 22.

In the second response process, the response processing unit 15 does not set ABC Zoo as the destination of the vehicle. The second response process is any response process that is different from the first response process. In the second response process, for example, in the control block 10, a target image that prompts the user to specify the destination of the vehicle is generated, and a video signal VS of the target image is output from the video signal output unit 11 under the control of the response processing unit 15. As a result, the target image that prompts the user to specify the destination of the vehicle is displayed on the display screen 22.

As can be understood from the above description (particularly see FIGS. 1 and 9), when the display position of the button icon is shifted by an amount corresponding to the shift information ( _xS , _yS ) by the wobbling process, the touch position ( _xT , _yT ) is corrected by subtracting the amount of the shift information ( _xS , _yS ). Therefore, the shift of the display position caused by the execution of the wobbling process on the display unit 20 side is canceled on the control unit 10 side, enabling an accurate touch operation (a touch operation as intended by the user).

In forming the display device 1, it is conceivable to obtain a modularized display unit 20 and combine the display unit 20 with the control unit 10. For example, a manufacturing form is considered in which a first vendor designs and manufactures the control unit 10, while a modularized display unit 20 manufactured or sold by a second vendor is obtained from the second vendor, and the first vendor combines the control unit 10 and the display unit 20 to form the display device 1. Even in such a case, by providing a mechanism for transmitting shift information (x _S , y _S ) from the display unit 20 to the control unit 10 as in this embodiment, accurate touch operation (touch operation as intended by the user) is possible.

The following provides supplementary information to the above, as well as application and modification techniques.

Although a capacitive touch panel has been given as an example of a touch panel, other types of touch panels (e.g., resistive touch panels) may be used in the display device 1.

The user's finger is a type of operating object used to perform touch operations. The operating object may be a pointing device such as a touch pen (stylus).

As an example of a touch operation, an operation of pressing a specific object (button icon) displayed on the display screen 22 with an operating object has been given, but the type of touch operation is arbitrary. The touch operation may be, for example, an operation of sliding the operating object on the display screen 22 while maintaining contact between the display screen 22 and the operating object.

The wobbling process may or may not be performed constantly. For example, the control unit 10 may instruct the display unit 20 to prohibit or permit the execution of the wobbling process by transmitting a predetermined control signal to the display unit 20. In this case, during a period in which the prohibition of the execution of the wobbling process is instructed, the ASIC 21 stops the execution of the wobbling process and keeps ( _xS , _yS ) = (0, 0).

The display device 1 can be installed in a vehicle such as an automobile. The display device 1 may be incorporated into any device or system mounted on the vehicle. For example, the display device 1 may be incorporated into a car navigation system mounted on the vehicle. However, the display device 1 is not limited to in-vehicle applications and may be used in any type of display device. In other words, the display device 1 may be mounted on any device that requires a display device, such as a personal computer, an information terminal (e.g., a tablet or a smartphone), a game device, or a television receiver.

Although it is assumed that the display screen 22 is configured with an organic EL element, the display screen 22 may be configured with an electro-optical element other than an organic EL element (e.g., a liquid crystal display element). However, the configuration according to the present invention is particularly useful when an electro-optical element that may cause burn-in is used.

The control unit 10 includes a touch operation detection device for detecting touch operations. The touch operation detection device is configured with receiving units 12 and 13 and a correction unit 14. It can be said that the control unit 10 functions as a display control device for the display unit 20.

A touch operation detection device according to one aspect of the present invention includes a shift information acquisition unit (12) that acquires, from a display unit (20) having a display screen (22) and capable of executing a wobbling process for moving the display position of an image displayed on the display screen, information on a shift of the display position caused by the wobbling process, and a touch position correction unit (14) that corrects a touch position on a touch panel formed including the display screen using the shift information.

A display control device (10) according to one aspect of the present invention includes the touch operation detection device, a video signal output unit (11) that generates a target image to be displayed on the display screen and outputs a video signal of the target image to the display unit, and a response processing unit (15) that executes a response process according to an operation on the touch panel based on the corrected touch position.

The embodiments of the present invention can be modified in various ways as appropriate within the scope of the technical ideas set forth in the claims. The above embodiments are merely examples of the present invention, and the meanings of the terms of the present invention or each of the constituent elements are not limited to those described in the above embodiments. The specific numerical values shown in the above description are merely examples, and can, of course, be changed to various numerical values.

REFERENCE SIGNS LIST 1 display device 10 control unit 11 video signal output unit 12 receiving unit (shift information acquisition unit)
13 Receiving unit 14 Correction unit (touch position correction unit)
15 Response processing unit 16 Pressing determination unit 20 Display unit 21 ASIC
22 Display screen 23 Touch sensor 23a Touch detection body 23b Touch detection IC
IF ₁₀ , IF ₂₀ interface section

Claims (4)

a display screen and a processing unit for performing a wobbling process for moving a display position of an image displayed on the display screen are modularized, and a shift information acquisition unit acquires the shift information from a display unit capable of outputting shift information of the display position by the wobbling process;
a touch position correction unit that corrects a touch position on a touch panel formed including the display screen using the shift information. The touch operation detection device according to claim 1 ;
a video signal output section that outputs a video signal of a target image to be displayed on the display screen to the display unit;
a response processing unit that executes a response process based on the corrected touch position. The display control device according to claim 2 , wherein the response processing unit includes a determination unit that determines whether or not a touch operation has been performed on a predetermined object included in the target image, based on the corrected touch position. an acquiring step of acquiring shift information from a display unit in which a display screen and a processing unit for performing a wobbling process for moving a display position of an image displayed on the display screen are modularized and which is capable of outputting shift information of the display position by the wobbling process;
and a touch position correcting step of correcting a touch position on a touch panel formed including the display screen using the shift information.

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