JP2012128786A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a deviation between a touch input position on a touch panel and a display position of display video when video resolution is changed.SOLUTION: The display device includes: a display part which displays video with a predetermined video resolution; a storage part which stores a plurality of coordinate conversion correction values previously made to correspond to display modes and video resolutions; a touch panel part which outputs input coordinates of a touch-input position on a screen; a resolution detection part which detects the video resolution being changed; a resolution change notification part which makes the display part displays video with a determination mark when the change in resolution is detected; a display mode determination part which determines a current display mode based upon input coordinate values corresponding to a touch panel resolution output from the touch panel part when touch input is performed at the position of the determination mark; and a correction value selection part which selects a coordinate conversion correction value, made to correspond to the video resolution after the change and the determined display mode, from the storage part.

Description

  The present invention relates to a display device, and more particularly, to a display device that is provided with a touch panel and can display an enlarged video signal.

Generally, a display device displays an image generated by a personal computer or the like and an input video such as a television broadcast on a screen based on a predetermined resolution.
Further, some of today's display devices can display an input video signal in an enlarged manner.
For example, a mode that displays the input video signal on the entire screen (wide mode), a mode that maintains the aspect ratio of the resolution of the input video signal (normal mode), and the resolution of the input video signal There is a display device having three display modes such as a display mode (dot-by-dot mode).

FIG. 12 shows a schematic explanatory diagram of the display state of the display screen in these three display modes.
Here, the resolution of the display device is 1920 × 1080. That is, the maximum number of dots (number of pixels) in the horizontal direction (X) is set to 1920, and the maximum number of dots (number of pixels) in the vertical direction (Y) is set to 1080.

FIG. 12C shows a display state in the dot-by-dot mode. In the example of the resolution of the input video signal, when the resolution in the horizontal direction (X) is 1024 dots and the resolution in the vertical direction (Y) is 768 dots, the video is displayed with that resolution. .
Here, since the resolution (1024 × 768) of the video signal is smaller than the resolution (1920 × 1080) of the display device, an undisplayed portion exists around the center display video.

  FIG. 12A shows the display state in the wide mode. In this display state, the input video shown in FIG. 12C is displayed by being stretched over the entire screen of the display device, and the video is displayed so that the video resolution matches the resolution of the display device (1920 × 1080). This is a display with the signal corrected.

FIG. 12B shows a display state in the normal mode.
Here, the entire input video is enlarged and displayed so as to be displayed on the screen while maintaining the aspect ratio (768: 1024 = 3: 4) of the input video in FIG. In this display, the video signal is corrected so that the resolution in the direction (X) is 1440 (= 1640-200) and the resolution in the vertical direction (Y) is 1080.

  In a display device equipped with a touch panel, when the resolution of the video signal is changed in this way, the position and size of the displayed video change. Therefore, it is necessary to correct the position coordinates of the touch panel according to the resolution. is there. If correction is not performed, the touched position on the touch panel may be misaligned with the video display position.

Further, in Patent Document 1, even when a virtual on-screen is set from information such as the resolution of an input video and the resolution of the display device is changed using the relative position and size of the virtual on-screen, input is possible. An on-screen display device that performs correction so that the display position of an image does not change is disclosed.
However, since this display device does not include a touch panel, changes in the position coordinates of the touch panel are not considered.

JP 2002-330364 A

However, in the case of a display device provided with a touch panel on the display screen of the display device, when the display mode is changed as described above, the display position of the image is corrected in accordance with the change in the resolution of the display image. In addition to this, it is necessary to correct the input position (touch position) of the touch panel, that is, the position coordinates where contact input is performed using a finger or the like, corresponding to the display image.
Further, for example, the content of the correction process differs between when the display mode is changed from the wide mode to the normal mode and when the display mode is changed from the dot-by-dot mode to the wide mode.

Further, when the resolution of the input video signal is changed, the touch position of the touch panel may be shifted from the video display position, and the user has to select and input the current display mode.
At this time, if the user does not know the current display mode, the correct display mode has not been selected, and the display position may be greatly shifted.
Further, before the display mode is selected by the input operation using the touch panel, the display mode has not yet been determined and the necessary position correction processing has not been performed. If the display position is greatly deviated, selection input may not be possible even if the touch panel is touched, and a display mode selection operation needs to be performed using an input device such as a mouse or a keyboard.

  Therefore, in a display device having a touch panel, when the resolution of the input video signal is changed or the display mode is switched, the display position of the display image and the position coordinates of the touch panel are not imposed on the user without burdening the operation. It is desirable to prevent deviation.

  The present invention has been made in consideration of the above circumstances, and in a display device having a touch panel, when the resolution of a video signal to be displayed is changed, the positional relationship between the touch panel and the display video It is an object of the present invention to provide a display device in which input coordinates of a touch panel can be easily converted by using an input operation of the touch panel.

  The present invention is a display device for displaying a video on a screen in any one of a plurality of display modes, a display unit for displaying a video at a predetermined video resolution, the display mode and the video resolution And a storage unit that stores a plurality of coordinate conversion correction values that are associated in advance with each other, and input coordinates of a position on the screen that is arranged on the screen of the display unit and is touch-input based on a predetermined touch panel resolution. An output touch panel unit, a resolution detection unit that detects that the video resolution has been changed, and a video that displays a determination mark at a predetermined position on the screen when it is detected that the video resolution has been changed. The resolution change notification unit to be displayed on the display unit and the input corresponding to the touch panel resolution output from the touch panel unit when the position of the displayed determination mark is input by touching. Based on the coordinate value, a display mode determination unit that determines the current display mode, and a coordinate conversion correction value associated with the detected video resolution after the change and the determined display mode are stored in the storage unit. And a correction value selection unit that selects from a plurality of coordinate conversion correction values stored in the display device.

  In addition, when the position on the screen of the display unit is touch-input using the coordinate conversion correction value selected by the correction value selection unit, the input coordinate value corresponding to the touch panel resolution output from the touch panel unit Is further provided with a coordinate conversion unit that converts the image into a screen coordinate value indicating the position of the screen of the display unit.

Further, for each of the plurality of display modes, a coordinate theoretical value obtained by converting a screen coordinate value of a determination mark displayed at a predetermined position on the screen of the display unit into an input coordinate value corresponding to the touch panel resolution is stored in the memory. The display mode determination unit compares the input coordinate value corresponding to the touch panel resolution of the position of the determination mark input by contact with the theoretical coordinate value for each display mode stored in the storage unit. Then, the display mode of the coordinate theoretical value closest to the input coordinate value is determined as the current display mode.
In the following embodiments, the video resolution corresponds to the output video resolution, and the determination mark corresponds to the display mode determination mark.

  According to the present invention, when the video resolution is changed, the display mode is determined based on the input coordinate value of the position where the displayed determination mark is touch-inputted, and the determined display mode and the changed display mode are changed. Since the coordinate conversion correction value associated with the video resolution is selected, it is possible to prevent the positional relationship between the touch panel and the display video from deviating.

1 is a configuration block diagram of an embodiment of a display device of the present invention. It is the image | video displayed by the resolution change notification part of this invention, Comprising: It is a display example in the case of wide mode. It is the image | video displayed by the resolution change notification part of this invention, Comprising: It is a display example in the case of normal mode. It is the image | video displayed by the resolution change notification part of this invention, Comprising: It is a display example in the case of dot by dot mode. It is explanatory drawing of one Example of the information memorize | stored in the memory | storage part of this invention. It is a flowchart of one Example of the resolution change process of this invention. It is a flowchart of one Example of the display mode determination process of this invention. It is a flowchart of one Example at the time of input operation of the touchscreen of this invention. In the case of the wide mode of this invention, it is explanatory drawing of one Example of the relationship between the screen coordinate of a display apparatus, and the coordinate of a touchscreen. In the case of the normal mode of this invention, it is explanatory drawing of one Example of the relationship between the screen coordinate of a display apparatus, and the coordinate of a touchscreen. It is explanatory drawing of one Example of the relationship between the screen coordinate of a display apparatus, and the coordinate of a touch panel in the case of the dot by dot mode of this invention. It is a schematic explanatory drawing of the display state of the display screen of three conventional display modes.

Hereinafter, the present invention will be described based on the embodiments shown in the drawings.
However, this does not limit the present invention.

<Configuration of display device>
FIG. 1 is a block diagram showing the configuration of an embodiment of a display device according to the present invention.
The display device of the present invention mainly includes a control unit 20, a coordinate input unit 30, a video signal output unit 40, a storage unit 50, a coordinate conversion unit 60, a resolution change notification unit 70, a resolution detection unit 75, a display mode determination unit 80, The correction value selection unit 85, the touch panel unit 90, and the display unit 100 are configured.

Here, the display unit 100 and the touch panel unit 90 are configured as a pair, and the touch panel unit 90 is formed on the screen of the display unit 100.
The display unit 100 is a part that displays an image, and mainly includes a display panel 101 and a display control unit 102.
As the display panel 101, for example, an LCD, PDP, CRT, organic EL, or the like is used.
The display control unit 102 is a part that converts the video signal sent from the video signal output unit 40 so that the video can be displayed on the display panel 101 and gives it to the display panel 101.

In particular, in the present invention, like the conventional display device described above, a plurality of display modes are provided, and an image is displayed on the screen in any one of the display modes.
The video displayed on the screen is displayed at a predetermined video resolution. For example, the video may be displayed at the same video resolution as that inherent to the display device, or may be displayed at the original video resolution when the video to be displayed is created.

The touch panel unit 90 is a part that is arranged on the screen of the display unit 100 and outputs input coordinates of a position on the screen that is contact-input based on a predetermined touch panel resolution. That is, it is a position input device that outputs information (coordinates) of a position touched by a finger when the operator presses the screen of the display panel with a finger or the like. Mainly, an input position detection unit 91 and a coordinate output unit 92 are output. It consists of.
The input position detection unit 91 is a part that generates a signal by detecting a position pressed by a finger in the touch panel arranged in a matrix on the screen. The coordinate output unit 92 outputs the generated signal. This is a part that outputs a coordinate value (also referred to as an input coordinate value or a touch panel coordinate value) corresponding to the pressed position of the touch panel by analysis. The touch panel coordinate value is a coordinate value based on a touch panel resolution fixedly set in advance.

The touch panel unit 90 may be a conventionally used touch panel. For example, any touch panel such as a resistance film method, a capacitance method, and an electromagnetic induction method may be used.
The coordinate value output from the coordinate output unit 92 is given to the coordinate input unit 30.
Here, the coordinate value is a planar two-dimensional coordinate value, and is generally expressed as (X coordinate, Y coordinate) when the horizontal direction of the rectangular screen is the X axis and the vertical direction is the Y axis. The That is, this coordinate value indicates the position of one point (dot) in the touch panel configured in a matrix.

  The control unit 20 is a part that controls the operation of each functional block (30-100) of the present invention, and is mainly realized by a microcomputer including a CPU, a ROM, a RAM, an I / O controller, a timer, and the like. Further, based on a control program stored in the ROM or the like of the storage unit 50, the CPU organically operates various hardware, thereby realizing each function of the display device of the present invention.

The control program may be provided by being stored in a storage medium such as a CD-ROM, or may be stored in a hard disk, in addition to the case where the control program is provided by being stored in a ROM or the like in advance.
Furthermore, it may be downloaded to a hard disk or the like as needed from another server or the like at a remote location via a network.
Alternatively, the control program may be incorporated in advance as one function in an operating system (OS) used in a personal computer or the like.
In addition, the coordinate conversion unit 60, the resolution change notification unit 70, the resolution detection unit 75, the display mode determination unit 80, and the correction value selection unit 85 described below are mainly realized by software. The control unit 20 can also be considered to correspond to an OS.

The coordinate input unit 30 is a part that receives coordinate values output from the coordinate output unit 92 of the touch panel unit 90, and the coordinate values are sent to the control unit 20 and stored as input coordinate values (Xt, Yt) of the touch panel. Stored in the unit 50.
The video signal output unit 40 is a part that outputs a video signal to the display unit 100 based on an instruction from the control unit 20.

  The coordinate conversion unit 60 selects the input coordinate value of the touch input position of the touch panel unit acquired by the coordinate input unit 30 from the coordinate conversion correction value 58 stored in advance in the storage unit 50 by the correction value selection unit 85. The coordinate conversion correction value is used for conversion into a coordinate value (screen coordinate value) indicating the screen position of the display unit corresponding to the current display mode.

  In general, the resolution of the display device and the resolution of the touch panel are often different. The resolution means the size of one pixel (pixel), and is determined by the number of pixels in the horizontal direction (X axis) and the number of pixels in the vertical direction (Y axis) of the screen of the display device. (Referred to as display device resolution) is different from the resolution (referred to as touch panel resolution) represented by the number of minimum units in the horizontal and vertical directions constituting the matrix-shaped touch panel.

For example, if the maximum horizontal pixel count Xk1 of the display device is 1920 and the maximum vertical pixel count Yk1 is 1080, the display device resolution (Xk1, Yk1) is (1920, 1080).
On the other hand, for example, when the minimum unit number Xk2 in the horizontal direction of the touch panel is 65536 and the minimum unit number Yk2 in the vertical direction is 65536, the touch panel resolution (Xk2, Yk2) is (65536, 65536).

  Since the input coordinate value (Xt, Yt) of the touch panel described above is a numerical value based on the touch panel resolution, the coordinate conversion unit 60 converts the input coordinate value (Xt, Yt) to a screen coordinate that is a numerical value based on the display device resolution. Convert to value.

As shown in FIG. 9B described later, when the display mode is the wide mode, if the position of the coordinates (65535, 65535) of the touch panel located at the lower right of the displayed image is pressed, the input coordinate value ( (65535, 65535) is output as (Xt, Yt).
In this case, the coordinate conversion unit 60 converts the input coordinate values (65535, 65535) into screen coordinate values (1919, 1079) shown in FIG.

The resolution detector 75 is a part that detects that the output video resolution has been changed. The change in the output video resolution can be detected, for example, by checking a resolution change message notification output by the OS and comparing the previous output video resolution with the current output video resolution.
Also, the output video resolution is changed in the case described later. When it is detected that the resolution has been changed, the resolution change notification unit 70 displays an image in which the display mode determination mark is displayed at a predetermined position on the screen.

The resolution change notification unit 70 is a part that displays information indicating that the resolution of the output video has been changed on the screen of the display unit 100, and notifies the operator that the output video resolution has been changed by the display. To do.
When the video resolution is changed, a display mode determination mark is displayed at a predetermined position on the screen on which the information is displayed.
For example, in the case of FIG. 2, a message notifying that the resolution has been changed (a character string such as “screen resolution has been changed”) and a “+” mark as a judgment mark are displayed. Yes.

The resolution of the output video means the resolution of the video signal output from the video signal output unit 40 (hereinafter referred to as output video resolution 53 or video resolution). This resolution may coincide with the resolution unique to the display device (display device resolution (Xk1, Yk1) 54), but a resolution smaller than the display device resolution 54 may be set by an application program or the like.
If the output video resolution 53 is (Xp, Yp), for example, (Xp, Yp) = (1024,768) may be given to the display device resolution (Xk1, Yk1) = (1920, 1080). . At this time, when the video is displayed on the display unit with the display device resolution (1920, 1080) while maintaining the output video resolution (1024, 768), for example, as shown in FIG. The video will be displayed.

This mark “+” indicates a position on the screen to be touched by the operator in order to determine the current display mode, and is referred to as a display mode determination mark or a determination mark. As will be described later, when the position of the mark “+” is touched, display mode determination processing is performed, and based on the determination result, coordinate conversion that automatically converts the input coordinate value of the touch panel to the screen coordinate value is performed. A correction value 58 is determined.
When the “No” part in the message area of the screen shown in FIG. 2 is touched, the correction value is not acquired and the current display mode setting value remains unchanged.

When the position of the determination mark “+” displayed by the resolution change notification unit 70 is touched and input, the display mode determination unit 80 is currently based on the input coordinate value corresponding to the touch panel resolution output from the touch panel unit. This is a part for determining the display mode. More specifically, when the determination mark “+” is touched, the input coordinate value (Xt, Yt) of the touch panel output corresponding to the position of the displayed mark “+” and each display mode. The current display mode is determined by comparing the calculated coordinate theoretical value of the mark “+”. When the video resolution is changed, the display mode after the resolution change is determined.
Here, the coordinate theoretical value means a value obtained by converting the position coordinate (screen coordinate value) of the determination mark “+” displayed at a predetermined position on the screen into the position coordinate (input coordinate value) of the touch panel. .
If the display mode is different, the position on the screen of the display unit where the determination mark “+” is actually displayed changes, and the coordinate value (coordinate theoretical value) of the touch panel corresponding to the display position of “+” also changes. .

In the following embodiments, the following three modes are assumed as display modes as in the conventional case. However, the present invention is not limited to this.
(A) Wide mode In this mode, output video is displayed on the entire screen of the display unit 100. At this time, as shown in FIG. 12A, the size of the output video matches the entire display screen, and the entire touch panel is used.

(B) Normal mode The entire output video is displayed on the screen of the display unit as large as possible while maintaining the same aspect ratio as the output video resolution (Xp, Yp). At this time, for example, as shown in FIG. 12B, undisplayed areas appear on the left and right parts of the screen of the display unit, and only the part of the touch panel corresponding to the area where the video is displayed is the input effective area. Used as. The part of the touch panel corresponding to the area where no video is displayed is not used.

(C) Dot-by-dot mode In this mode, the output video is displayed on the screen of the display unit while maintaining the output video resolution (Xp, Yp). When the output video resolution (Xp, Yp) is smaller than the display device resolution (Xk1, Yk1), for example, the display is performed as shown in FIG. Only the part of the touch panel corresponding to the area where the video is displayed becomes the input effective area.

As shown in FIGS. 12A, 12 </ b> B, and 12 </ b> C, even if the same output video signal is given to the display unit 100, if the display mode is different, the appearance and size of the displayed image are different. Different.
2, 3 and 4 show display examples of the same video displayed on the screen of the display unit by the resolution change notification unit 70. FIG.

2 is a display example when the display mode is the wide mode, FIG. 3 is a display example when the normal mode is used, and FIG. 4 is a display example when the dot mode is the dot-by-dot mode.
As can be seen by comparing these displays, since the position on the screen where the mark “+” is actually displayed is different, the coordinate values for the touch panel corresponding to this display position are also different. That is, when the operator presses the display position of the mark “+”, the input coordinate values (Xt, Yt) output from the coordinate output unit 92 of the touch panel differ for each of the three display modes.
Therefore, the current display mode is determined by using the difference between the coordinate values that is different for each display mode.

For this determination, as will be described later, a coordinate theoretical value (Xd, Yd) 57 for each display mode indicating the position of the mark “+” on the touch panel is used.
Specifically, the input coordinate value (Xt, Yt) corresponding to the touch panel resolution at the position of the determination mark actually input by contact, and the coordinate theoretical value (Xd, Yd) for each display mode stored in the storage unit. And compare. Here, the distance (Ds0, Ds1, Ds3) between each coordinate theoretical value and the input coordinate value is calculated, and the display mode with the smallest distance among the distances calculated for each display mode is set as the current display mode. Is determined. That is, the display mode of the coordinate theoretical value closest to the input coordinate value is determined as the current display mode.

  The correction value selection unit 85 stores the changed video resolution detected by the resolution detection unit 75 and the coordinate conversion correction value associated with the display mode determined by the display mode determination unit 80 in the storage unit. This is a portion to be selected from a plurality of coordinate conversion correction values 58. Here, the coordinate conversion unit 60 extracts one coordinate conversion correction value 58 used for converting the input coordinate value of the touch panel into the screen coordinate value.

The storage unit 50 is a part for storing information used in the display mode determination processing and coordinate change processing of the present invention, and ROM, RAM, hard disk, etc. are used. Information stored in a fixed manner in advance is stored in a ROM or a hard disk, and information to be changed or information generated in the process is stored in a RAM or hard disk.
The storage unit 50 mainly includes input coordinate values (Xt, Yt) 51, display mode (DM) 52, output video resolution (Xp, Yp) 53, display device resolution (Xk1, Yk1) 54, touch panel resolution (Xk2, Yk2) 55, display mode determination mark coordinates (Xm, Ym) 56, coordinate theoretical values (Xd, Yd) 57, and coordinate conversion correction values 58 are stored. However, the present invention is not limited to this, and other information necessary for the display mode determination process and programs for executing various processes are also stored.

FIG. 5 is an explanatory diagram of an example of information stored in the storage unit 50.
As described above, the input coordinate value (Xt, Yt) 51 is a coordinate value of the touch panel that indicates a position where the operator makes a touch input (touch). For example, when the resolution (Xk2, Yk2) of the touch panel is (65536, 65536), the coordinate values Xt and Yt are any values from 0 to 65535.

The display mode DM52 stores the display mode determined by the display mode determination unit 80. That is, it is information indicating the display method of the video displayed on the display unit, for example, information indicating which of the three display modes is the determined display mode.
As shown in FIG. 5, DM = 0 when the determination result is the wide mode, DM = 1 when the determination mode is normal, and DM = 2 when the determination result is the dot-by-dot mode.

As described above, the output video resolution (Xp, Yp) 53 indicates the resolution of the output video given from the video signal output unit 40 to the display unit 100. Here, the output video resolution (Xp, Yp) 53 is the same as the display device resolution 54 or It is assumed that a smaller value is set.
The output video resolution 53 is switched by, for example, an operator's operation.

  The display device resolution (Xk1, Yk1) 54 indicates the maximum resolution that can be displayed by the display device. For example, in the case of a liquid crystal monitor with a full HD (1920x1080) liquid crystal panel resolution, The resolution Xk1 in the (direction X axis) is 1920, and the resolution Yk1 in the vertical direction (vertical Y axis) is 1080.

  The touch panel resolution (Xk2, Yk2) 55 indicates the resolution of the touch panel itself as described above, and is set in advance according to the specifications of the touch panel to be used. Here, the resolution Xk2 in the horizontal direction (X axis) is set to 65536, and the resolution Yk2 in the vertical direction (Y axis) is set to 65536.

  The display mode determination mark coordinates (Xm, Ym) 56 are screen coordinate values for the screen of the display unit 100 of the mark “+” displayed in the video shown in FIG. For example, the coordinate “Xm” in the horizontal direction (X axis) of the screen of the mark “+” is set to 256 and the coordinate Ym in the vertical direction (Y axis) of the screen is set to 192. The screen coordinate value (Xm, Ym) = (256, 192) is a position where the center point of the mark “+” is displayed.

As described above, the coordinate theoretical value (Xd, Yd) 57 is the theoretical value (coordinate) in the coordinate system of the touch panel of the mark “+”, and is determined for each display mode from the screen coordinate value 56 of the mark “+”. It is calculated in advance.
Further, the theoretical coordinate value 57 of the mark “+” is calculated by a calculation formula as will be described later using an output video resolution 53, a display device resolution 54, and a touch panel resolution 55 that are different for each display mode.

According to the calculation method as described later, the coordinate theoretical value 57 of the mark “+” which is the screen coordinate value (256, 192) becomes the coordinate theoretical value as shown in FIG.
For example, when the display mode DM is the wide mode (0), the coordinate theoretical value (Xd0, Yd0) of the mark “+” is (16384, 16384). In the normal mode (1), the theoretical coordinate value (Xd1, Yd1) is (20480, 16384). In the dot-by-dot mode (2), the theoretical coordinate value (Xd2, Yd2) is ( 24030, 21117).

  The coordinate conversion correction value 58 is associated with the display mode and the video resolution in advance, and the correction coefficient (X, Y) used by the coordinate conversion unit 60 in the coordinate conversion process and the correction adjustment value (X, Y). Are stored in advance. By using this correction coefficient or the like, the input coordinate value of the position of the touch panel actually input by the operator is converted into the screen coordinate value of the output video signal.

  FIG. 5 shows an example of the coordinate conversion correction value. The correction coefficient and the like vary depending on the current display mode and the output video resolution 53. Therefore, a plurality of coordinate conversion correction values are stored in the storage unit. FIG. 5 shows a numerical example in the case where the output video resolution (Xp, Yp) 53 is (1024, 768) and three display modes are set. In the embodiment of FIG. 5, it is assumed that four digits after the decimal point are rounded off and represented by three digits after the decimal point.

In FIG. 5, the correction coefficient X indicates the ratio between the width of the entire panel and the width of the effective input area, and the correction coefficient Y indicates the ratio of the height of the entire panel and the height of the effective input area. These correction coefficients are used for conversion from the input coordinate system to the coordinate system of the display area.
Further, the correction adjustment value X indicates the positional deviation between the entire panel and the effective input area in the horizontal direction, and the correction adjustment value Y indicates the position of the entire panel and the effective input area in the vertical direction. These correction adjustment values mean values for correcting the input region position shift.
The correction coefficient (X, Y) is obtained from the width / height of the input area and the width / height of the display area. Further, the correction adjustment value (X, Y) is obtained from the positional deviation between the touch panel input area and the display area.

In FIG. 5, when the display mode is the wide mode (0), the width / height of the entire panel and the width / height of the effective input area coincide with each other. 1 and the correction coefficient Y is 1.
In the wide mode, since the position of the origin of the effective input area and the whole panel in the horizontal and vertical directions coincide with each other, the correction adjustment value X is 0 and the correction adjustment value Y is 0.

When the display mode is the normal mode (1), since the aspect ratio is fixed and the image is enlarged to the maximum, the height of the entire panel and the height of the effective input area coincide with each other in the vertical direction. The width of the entire panel does not match the width of the valid input area. At this time, the X value of the resolution corresponding to the effective input area is (recommended resolution Y value = 1080) ÷ (resolution Y value = 768) × (resolution X value = 1024) = 1440, and the correction coefficient X (Recommended resolution X value = 1920) ÷ (X value of resolution corresponding to valid input area = 1440) = 1.333. Further, the correction coefficient Y has a ratio of 1 because the height of the entire panel and the height of the effective input area coincide.
Furthermore, in the normal mode (1), in the horizontal direction, the width of the input area is set so that the width of the entire panel does not match the width of the effective input area, and the center of the panel is the middle point. Therefore, the correction adjustment value X is obtained from the difference between the midpoints when correction is not performed, and the correction adjustment value X = correction coefficient X × (midpoint = (recommended resolution X ÷ 2) = (1920/2) = 960) -Midpoint (960) without correction = 170.667. In addition, the correction adjustment value Y is 0 because the position of the origin of the effective input area coincides with the whole panel in the vertical direction.

Further, when the display mode is the dot-by-dot mode (2), the ratio of the X value of the recommended resolution to the X value of the display resolution becomes the correction coefficient X. Therefore, the correction coefficient X is, for example, (with the recommended resolution) X value = 1920) / (X value of display resolution = 1024), which is 1.875. Similarly, the correction coefficient Y is obtained by (Y value of recommended resolution = 1080) / (Y value of resolution to display = 768) and is 1.406.
Further, in the dot-by-dot mode (2), in the horizontal direction, the width of the entire panel does not match the width of the effective input area, and the width of the input area is set so that the center of the panel is the middle point. Since the correction adjustment value X is set, the correction adjustment value X is obtained from the difference between the midpoints when correction is not performed, and the correction adjustment value X = (midpoint of the X value of the recommended resolution = (1920/2) = 960) − (displayed) The midpoint of the X value of the resolution = (1024/2) = 512) = 448. Further, the correction adjustment value Y is obtained in the same manner, and the correction adjustment value Y = (midpoint of Y value of recommended resolution = (1080/2)) = 540) − (midpoint of Y value of resolution to be displayed = (768 ÷ 2) = 384) = 156.

  In addition to these pieces of information, the storage unit 50 stores a distance Ds between a coordinate theoretical value (Xd, Yd) 57 and an input coordinate value (Xt, Yt) 51, for example, as shown in FIG. Also good. This distance Ds is obtained for each display mode.

  The distance to the wide mode (0) is called Ds0, the distance to the normal mode (1) is called Ds1, and the distance to the dot-by-dot mode (2) is called Ds2.

<Relationship between screen coordinates and touch panel coordinates>
Here, an example of the relationship between the screen coordinates of the display device and the coordinates of the touch panel is shown for each display mode.
FIG. 9 is an explanatory diagram of an example of the coordinate relationship in the wide mode.
FIG. 9A shows an example of screen coordinates of the display device.
Here, the case where the resolution (Xk1, Yk1) 54 of the display device is (1920, 1080) is shown.

  The display device has 1920 pixels arranged in the horizontal direction (X axis) and 1080 pixels arranged in the vertical direction (Y axis). In the wide mode, the entire screen is used. Display the image. That is, when displaying a video in the wide mode, the output video uses the entire screen and is therefore displayed at the same resolution (1920, 1080) as the display device resolution 54.

FIG. 9B shows an example of the coordinates of the touch panel attached in correspondence with the entire screen of the display device.
Here, the case where the resolution (Xk2, Yk2) of the touch panel is (65536, 65536) is shown.
In the wide mode, an input operation is performed using the entire touch panel from the upper left coordinate (0, 0) to the lower right coordinate (65535, 65535).
Therefore, since the minimum unit area of the touch panel in FIG. 9B is smaller than the size of one pixel in FIG. 9A, the screen coordinates and the touch panel coordinates do not correspond one-to-one.

  The coordinate conversion unit 60 associates both the coordinates, and mainly converts the touch panel coordinates at the position touched by the operator into the screen coordinates of the display device at the touched position. For this conversion, the coordinate conversion correction value 58 in the wide mode (0) shown in FIG. 5 is used.

FIG. 10 shows an explanatory diagram of an embodiment of the coordinate relationship in the normal mode.
FIG. 10A shows an example of the coordinates of the video area displayed in the normal mode.
Here, the normal mode display image area has a horizontal width of 1440 pixels and a vertical width of 1080 pixels. That is, in this normal mode, an image with an aspect ratio of 3: 4 is displayed. At this time, for example, as shown in FIG. 10A, the screen area is surrounded by pixels in the horizontal direction (X axis) from 240 to 1679 and pixels in the vertical direction (Y axis) from 0 to 1079. The video is displayed. No video is displayed in a portion other than this area.

FIG. 10B shows an example of the coordinates of the touch panel corresponding to the area where the video is displayed in the normal mode.
Here, the horizontal coordinates a0 to a1 of the touch panel of FIG. 10B correspond to the horizontal coordinates 240 to 1679 of the screen coordinates of FIG. 10A, and the vertical coordinates of the screen coordinates. 0 to 10539 correspond to 0 to 65535 of the vertical coordinate of the touch panel.
In this case, the area of the touch panel surrounded by the minimum unit of a0 to a1 in the horizontal direction (X axis) and the minimum unit of 1 to 65536 in the vertical direction (Y axis) is an effective area for contact input. That is, in the normal mode, an input operation is performed using the area of the touch panel from (a0, 1) to (a1, 65536) in FIG.

Touching the touch panel in other areas, that is, the left end area and the right end area where no video is displayed is invalidated.
In the case of the normal mode, when the touch panel in the area where the image that is the effective area is displayed is touched, the coordinate of the touched touch panel shown in FIG. The screen coordinates shown in For this conversion, the normal mode (1) coordinate conversion correction value 58 shown in FIG. 5 is used.

FIG. 11 is an explanatory diagram illustrating an example of the coordinate relationship in the dot-by-dot mode.
FIG. 11A shows an example of the coordinates of the video area displayed in the dot-by-dot mode.
In the dot-by-dot mode, an image is displayed in an area having the same size as the output image resolution 53. Here, a case where the output video resolution (Xp, Yp) 53 is (1024, 768) is shown.
In FIG. 11A, an image is displayed in a 1024 × 768 pixel area surrounded by pixels 448 to 1471 of the horizontal coordinate of the screen coordinates and pixels 156 to 923 of the vertical coordinate. . No video is displayed in the area outside the pixel area.

FIG. 11B shows an example of the coordinates of the touch panel corresponding to the area where the video is displayed in the dot-by-dot mode.
Here, the horizontal coordinates c0 to c1 of the touch panel of FIG. 11B correspond to the horizontal coordinates 448 to 1471 of the screen coordinates of FIG. 11A, and the vertical coordinates of the screen coordinates. Corresponding to the vertical coordinates d0 to d1 of the touch panel in FIG. 11B.
In this case, the area of the touch panel from (c0, d0) to (c1, d1) corresponding to the video display area becomes an effective area for contact input, and an input operation is performed using this area.

  In the case of the dot-by-dot mode, when the touch panel in the area where the image that is the effective area is displayed is touched, the coordinates of the touched touch panel shown in FIG. 11B are displayed on the screen shown in FIG. Converted to coordinates. For this conversion, the coordinate conversion correction value 58 in the dot-by-dot mode (2) shown in FIG. 5 is used.

  As described above, the coordinates of the touch panel at the position where the touch is input are converted into the screen coordinates of the display mode using the coordinate conversion correction value 58 set in advance for each display mode. Even when is changed, it is possible to prevent the positional deviation between the touch panel and the display image.

However, in the present invention, since it is necessary to adopt the coordinate conversion correction value 58 corresponding to the display mode, as shown in FIG. 5, a correction coefficient or the like is set in advance for each combination of output video resolution and display mode. Remember.
Further, when the output video resolution is changed, in order to determine which correction value among these coordinate conversion correction values 58 is used, the screens as shown in FIGS. 2, 3 and 4 are displayed. Display, and let the operator touch the position of the mark “+” in the screen.
Then, using the touch panel coordinates (input coordinate value 51) corresponding to the position of the touched mark “+”, the display mode after the resolution change is determined by display mode determination processing as described later.

Also, the resolution of the output video can be acquired by calling a current resolution acquisition function provided by the OS, for example. The coordinate conversion correction value 58 to be used is determined (selected) from the acquired output video resolution and the display mode information of the determination result.
Thereafter, using the determined coordinate conversion correction value 58, the touch panel coordinates at the touched position are converted into screen coordinates, and a function corresponding to the matter (input position) displayed at the touched position is executed. The

<Resolution change processing>
Hereinafter, processing executed when the screen resolution is changed will be described.
Changing the screen resolution means that the resolution 53 of the output video to be displayed on the display unit is changed. The case where the output video resolution 53 is changed can be considered as follows, for example.
(1) When the display mode is switched by the operator's input operation.
(2) When the PC is changed.
When any of these events occurs, the resolution changing process shown in FIG. 6 is executed.

FIG. 6 shows a flowchart of an embodiment of the resolution changing process of the present invention.
In step S31, the control unit 20 acquires the current output video resolution 53 from the resolution acquisition function provided by the OS. The previous output video resolution is stored without being erased, and the newly acquired resolution is stored in the storage unit 50 as the current resolution.
The current output video resolution 53 corresponds to the resolution after the resolution change.

In step S32, the resolution detector 75 checks whether or not the output video resolution has been changed.
The change in resolution is detected by, for example, comparing the previous resolution with the acquired current resolution. If both resolutions are the same, the resolution does not change, and the process returns to step S31.
If the two resolutions are different, that is, if the resolution is changed, the process proceeds to step S33.

  In step S33, the control unit 20 sends an instruction to the resolution change notification unit 70 to display the resolution change notification screen. Thereby, the resolution change notification unit 70 causes the display unit 100 to display a resolution change notification screen as shown in FIG. 2 via the video signal output unit 40.

In step S34, the resolution change notifying unit 70 displays the display mode determination mark “+” on the screen. This mark “+” is displayed at the position of the screen coordinate value (Xm, Ym) 56 stored in advance in the storage unit 50.
For example, as shown in FIG. 5, the mark “+” is displayed at the position (256, 192) that is the screen coordinates of the display unit 100.

  When the output video resolution is changed by the processing so far, the resolution change notification screen is displayed without any special operation by the operator, and the resolution is changed to the operator. A message for inquiring to acquire a coordinate change correction value in order to newly determine the display mode is notified.

  This screen display is performed in a size suitable for the current display mode. For example, when the current display mode is the wide mode, the display as shown in FIG. 2 is performed. 3 is displayed in the normal mode, and the display in FIG. 4 is performed in the dot-by-dot mode.

  Further, in the display state of the screen in step S34, it is not yet determined which display mode after the resolution change is performed. Therefore, the processing from step S35 to S37 is performed to select which display mode after the resolution change. Determine whether.

In step S35, the control unit 20 checks whether the operator has performed an input operation using the touch panel while looking at the display screen. When the operator presses a position on the touch panel, the coordinates of the position (input coordinate values (Xt, Yt) 51) are output from the coordinate output unit 92, and the control unit via the coordinate input unit 30 20 is sent.
When the input coordinate value 51 is sent, it is determined that there is an input from the touch panel, and the process proceeds to step S36. If there is no input from the touch panel, step S35 is looped.
In step S36, it is checked whether or not the input from the touch panel indicates that correction values are not automatically acquired (correction value acquisition unnecessary input).

Here, for example, when the display of FIG. 2 is displayed, when the touch panel in the rectangular area where “No” is displayed is pressed, it is determined that there is an input indicating that correction value acquisition is not required.
That is, when the input coordinate value (Xt, Yt) 51 sent is a coordinate in the rectangular area, it is determined that there is an input that does not require acquisition of a correction value by the operator.
In this case, the process proceeds to step S38, the resolution change notification screen displayed in step S34 is deleted, and the process ends.

On the other hand, if there is no input indicating that correction value acquisition is not required, the process proceeds to step S37 to perform display mode determination processing.
When the correction value is automatically acquired, the display screen in step S34 shows a message indicating that the center of the mark “+” is touched. Therefore, when the operator wants to automatically acquire the correction value, “ It is considered that the position where “+” is displayed is pressed. Therefore, when there is some touch input from the touch panel, but the input is not an input indicating that the correction value acquisition is unnecessary, it can be considered that the position where “+” is displayed is pressed.
That is, when the position where “+” is displayed is pressed, the input coordinate value (Xt, Yt) on the touch panel at that position is acquired, and the process proceeds to step S37.

In step S37, it is determined which display mode should be used after the resolution change. Details of this determination processing are shown in a flowchart of FIG.
In step S37, the distance Ds shown in FIG. 5 for each display mode is calculated, and the display mode in which the smallest value is calculated is selected and stored in the storage unit 50.
In calculating the distance Ds, the input coordinate value (Xt, Yt) of the touch panel at the position of the mark “+” input in step S35 and the theoretical coordinate value (Xd, Yd) as shown in FIG. Used.

After step S37, the process proceeds to step S38, the displayed resolution change notification screen is deleted, and the process ends.
Thereafter, when there is an input using the touch panel, the coordinate conversion correction value 58 selected from the changed output video resolution (Xp, Yp) 53 and the information of the display mode DM52 determined in step S37 is used. Thus, the input coordinate values (Xt, Yt) of the touch panel that have been input are converted into screen coordinate values.

<Display mode determination processing>
FIG. 7 shows a flowchart of an embodiment of the display mode determination process in step S37.
In step S51, the coordinate theoretical value (Xd0, Yd0) 57 of the display mode determination mark in the wide mode is calculated. This coordinate theoretical value (Xd0, Yd0) is obtained by the following equation.
Xd0 = Xm ÷ Xp × Xk2
Yd0 = Ym ÷ Yp × Yk2
Here, (Xm, Ym) is the screen coordinate value 56 of the display mode determination mark “+”, (Xp, Yp) is the output video resolution 53, and (Xk2, Yk2) is the touch panel resolution 55. is there.

For example, in the example shown in FIG. 5, (Xm, Ym) = (256, 192), (Xp, Yp) = (1024, 768), (Xk2, Yk2) = (65536, 65536). ,
Xd0 = Xm ÷ Xp × Xk2
= 256 ÷ 1024 × 65536 = 16384
Yd0 = Ym ÷ Yp × Yk2
= 192 ÷ 768 × 65536 = 16384
That is, the theoretical coordinate value in the wide mode is (Xd0, Yd0) = (16384, 16384).

In step S52, the ratio (Rx, Ry) between the output video resolution (Xp, Yp) 53 and the display device resolution (Xk1, Yk1) 54 is calculated.
The ratio is obtained by the following equation.
Rx = Xp ÷ Xk1
Ry = Yp ÷ Yk1

In the case of the specific example of FIG. 5, (Xp, Yp) = (1024, 768), (Xk1, Yk1) = (1920, 1080).
Rx = Xp ÷ Xk1
= 1024 ÷ 1920 = 0.533
Ry = Yp ÷ Yk1
= 768 ÷ 1080 = 0.711

In step S53, the calculated X direction ratio Rx is compared with the Y direction ratio Ry.
If Rx <Ry, the process proceeds to step S54, and if not, the process proceeds to step S56. In the specific example of FIG. 5, since Rx <Ry, the process proceeds to step S54.

In step S54, the enlargement ratio Exp is calculated on the assumption of display in the normal mode. Here, since the ratio Ry in the Y direction is larger than the ratio in the X direction, the resolution enlargement ratio in the Y direction is obtained by the following equation.
Enlargement ratio Exp = Yk1 ÷ Yp
In the case of FIG. 5, Exp = Yk1 ÷ Yp = 1080 ÷ 768 = 1.41.

In step S55, assuming the display in the normal mode, the position (X1, Y1) of the video origin (0, 0) is calculated.
This position (X1, Y1) is the screen coordinates at which the video origin (0, 0) is displayed when the normal mode is displayed. Here, (X1, Y1) is obtained by the following equation.
X1 = Xk1 ÷ 2− (Xp × Exp) ÷ 2
Y1 = 0
In the normal mode display in this case, an image is displayed on the entire screen in the vertical direction (Y-axis), and areas that are not displayed on the left end and the right end in the horizontal direction (X-axis) are generated.

In the specific example of FIG.
X1 = Xk1 ÷ 2− (Xp × Exp) ÷ 2
= 1920 ÷ 2− (1080 × (1080 ÷ 768)) ÷ 2
= 240
Y1 = 0
That is, the screen coordinates (X1, Y1) of the video origin in the normal mode are (240, 0).

On the other hand, in step S56, the enlargement ratio Exp is calculated in the same manner as in step S54, but here it is calculated by the following equation.
Exp = Xk1 ÷ Xp
In step S57, the position (X1, Y1) of the video origin (0, 0) is calculated as in step S55.
Here, (X1, Y1) is obtained by the following equation.
X1 = 0
Y1 = Xk1 ÷ 2− (Yp × Exp) ÷ 2

In step S55 or step S57, after calculating the position of the origin of the normal mode, the process proceeds to step S58.
In step S58, the screen coordinates (X2, Y2) of the display mode determination mark “+” are obtained. That is, the position on the screen where the mark “+” is actually displayed is obtained in the normal mode.
The screen coordinates (X2, Y2) correspond to coordinate values obtained by converting the coordinates (Xm, Ym) of the mark “+” by the display device resolution with the position (X1, Y1) as a reference.
This (X2, Y2) is obtained by the following equation.
X2 = X1 + Xm × Exp
Y2 = Y1 + Ym × Exp

In the specific example of FIG.
X2 = X1 + Xm × Exp
= 240 + 256 × (1080 ÷ 768)
= 240 + 360 = 600
Y2 = Y1 + Ym × Exp
= 0 + 192 × (1080 ÷ 768)
= 270
That is, the position (X2, Y2) of the mark “+” in the case of FIG. 5 is (600, 270).

In step S59, in the normal mode, the coordinate theoretical values (Xd1, Yd1) for the touch panel of the display mode determination mark “+” are calculated.
This coordinate theoretical value (Xd1, Yd1) is obtained by the following equation.
Xd1 = X2 ÷ Xk1 × Xk2
Yd1 = Y2 ÷ Yk1 × Yk2

In the case of FIG.
Xd1 = X2 ÷ Xk1 × Xk2
= 600 ÷ 1920 × 65536 = 20480
Yd1 = Y2 ÷ Yk1 × Yk2
= 270 ÷ 1080 × 65536 = 16384
Therefore, in the specific example of FIG. 5, the coordinate theoretical values (Xd1, Yd1) in the touch panel coordinates of the mark “+” in the normal mode are (20480, 16384).

In step S60, the display position (X3, Y3) of the video origin when the dot-by-dot mode is assumed is calculated. This corresponds to the origin position (X2, Y2) of the normal mode obtained in step S55, but the position (X3, Y3) of the dot-by-dot mode is obtained by the following equation.
X3 = (Xk1 ÷ 2) − (Xp ÷ 2)
Y3 = (Yk1 ÷ 2) − (Yp ÷ 2)

In the specific example of FIG.
X3 = (1920/2)-(1024/2)
= 448
Y3 = (1080/2)-(768/2)
= 156
That is, in the case of the dot-by-dot mode, the video origin (0, 0) is displayed at a position of (X3, Y3) = (448, 156) when converted into display device resolution.

In step S61, in the case of the dot-by-dot mode, the coordinates (Xm, Ym) of the display mode determination mark “+” are converted into coordinate values of the display device resolution. When the coordinate value after conversion is (X4, Y4), it is obtained by the following equation.
X4 = X3 + Xm
Y4 = Y3 + Ym

In the case of FIG.
X4 = X3 + Xm = 448 + 256 = 704
Y4 = Y3 + Ym = 156 + 192 = 348
That is, in the dot-by-dot mode, the mark “+” is displayed at a position of (X4, Y4) = (704, 348) when converted to the display device resolution.

In step S62, a theoretical coordinate value (Xd2, Yd2) for the touch panel of the mark “+” in the dot-by-dot mode is calculated.
Here, the coordinate theoretical value (Xd2, Yd2) is obtained by the following equation.
Xd2 = X4 ÷ Xk1 × Xk2
Yd2 = Y4 ÷ Yk1 × Yk2

In the case of FIG.
Xd2 = X4 ÷ Xk1 × Xk2
= 704 ÷ 1920 × 65536
= 24030
Yd2 = Y4 ÷ Yk1 × Yk2
= 348 ÷ 1920 × 65536
= 21117
Therefore, in the case of the specific example of FIG. 5, the coordinate theoretical values (Xd2, Yd2) in coordinates on the touch panel of the mark “+” in the dot-by-dot mode are (24030, 21117).

  With the above processing, the theoretical coordinate value (Xd, Yd) of the display mode determination mark “+” was calculated for each of the three display modes.

  In step S63, for each display mode, the calculated coordinate theoretical value (Xd, Yd) of the mark “+” and the input coordinate value (Xt, Yt) of the touch panel of the mark “+” pressed by the operator The distance Ds is calculated. This distance Ds is a linear distance between two coordinate values.

For example, the wide mode distance Ds0 is obtained by the following equation.
Ds0 = √ (ABS (Xt−Xd0) ^ 2 + ABS (Yt−Yd0) ^ 2)
The normal mode distance Ds1 is obtained by the following equation.
Ds1 = √ (ABS (Xt−Xd1) ^ 2 + ABS (Yt−Yd1) ^ 2)
The dot-by-dot mode distance Ds2 is obtained by the following equation.
Ds2 = √ (ABS (Xt−Xd2) ^ 2 + ABS (Yt−Yd2) ^ 2)

In the case of the specific example of FIG. 5, each distance is calculated as follows.
Here, the input coordinate value (Xt, Yt) of the mark “+” = (16390, 16200).
(1) In the wide mode (Xd0, Yd0) = (16384, 16384)
Ds0 = √ (ABS (16384-16390) ^ 2 + ABS (16384-16200) ^ 2)
= √ (6 ^ 2 + 184 ^ 2) ≈184

(2) In the normal mode (Xd1, Yd1) = (20480, 16384)
Ds1 = √ (ABS (20480-16390) ^ 2 + ABS (16384-16200) ^ 2)
= √ (4090 ^ 2 + 184 ^ 2) ≈4094

(3) In the case of dot-by-dot mode (Xd2, Yd2) = (24030, 21117)
Ds2 = √ (ABS (24030-16390) ^ 2 + ABS (21117-16200) ^ 2)
= √ (7660 ^ 2 + 4917 ^ 2) ≒ 9086

  Next, in steps S64 to S69, the smallest one of the three distances (Ds0, Ds1, Ds2) is adopted, and the value of the display mode having the smallest distance is set in the display mode DM.

In step S64, if Ds0 ≦ Ds1, the process proceeds to step S65, and if not, the process proceeds to step S66.
In step S65, if Ds0 ≦ Ds2, the process proceeds to step S67, and if not, the process proceeds to step S68.
In step S66, if Ds1 ≦ Ds2, the process proceeds to step S68, and if not, the process proceeds to step S69.

In step S67, since the distance Ds0 in the wide mode is the smallest among the three distances, 0 (wide mode) is set in the display mode DM.
In step S68, since the distance Ds2 in the dot-by-dot mode is the smallest, 2 (dot-by-dot mode) is set as the display mode DM.
In step S69, since the distance Ds1 in the normal mode is the smallest, 1 (normal mode) is set in the display mode DM.
Through the above processing, the display mode is determined.

<Processing during touch panel input operations>
FIG. 8 shows a flowchart of an embodiment when the operator performs an input operation using the touch panel.
In step S11, the control unit 20 checks whether or not an input operation by the touch panel unit 90 has been performed by the operator (touch panel input monitoring process).
Specifically, the input position detection unit 91 detects that there is an input, the coordinates of the input position are output from the coordinate output unit 92, and the input coordinate value is input to the coordinate input unit 30. To check whether it is received via.

In step S12, if any input coordinate value is input, the process proceeds to step S13, and if not, the process returns to step S11.
Here, the received input coordinate value is a touch panel coordinate value (Xt, Yt) 51 and is stored in the storage unit 50.

In step S13, the correction value selection unit 85 reads the output video resolution (Xp, Yp) 53 and the display mode (DM) 52 already stored in the storage unit 50, and performs coordinate conversion correction corresponding to these pieces of information. The value 58 is acquired (selected).
For example, when the output video resolution (Xp, Yp) 53 is (1024, 768) and the display mode (DM) 52 is the normal mode (1), the coordinate conversion correction value 58 shown in FIG. Corresponding information (correction coefficient X = 1.333, correction coefficient Y = 1, correction adjustment value X = 1700.667, correction adjustment value Y = 0) is read out.

In step S <b> 14, the coordinate conversion unit 60 performs a coordinate conversion process on the received input coordinate value of the touch panel. Here, the received input coordinate value (Xt, Yt) is converted into a screen coordinate value by using the coordinate conversion correction value 58 acquired in step S13.
If the input coordinate value of the touch panel at the position pressed on the touch panel unit is, for example, (Xt, Yt) = 16390, 16200), it is assumed that the output video resolution (1024, 168) and the display mode DM = 1. The corresponding screen coordinate value (X, Y) is calculated by the following equation.
Value obtained by replacing Xt with coordinates of display device = 16390 ÷ 65536 × 1024 = 256.09375≈256 (rounded off to whole number)
Value obtained by replacing Yt with display device coordinates = 16200 ÷ 65536 × 768 = 189.84375≈190 (rounded to the nearest whole number)
Value obtained by replacing X = Xt with the coordinates of the display device × correction coefficient X−correction adjustment value X = 256 × 1.333−170.667 = 170.581≈171 (rounded to the nearest whole number)
Value obtained by replacing Y = Yt with coordinates of display device × correction coefficient Y−correction adjustment value Y = 190 × 1-0 = 190
Thereby, the coordinate of the input position of a touch panel is converted into the coordinate value of the screen corresponding to the display mode displayed on the display part.

  In step S15, the control unit 20 reads a function (program) corresponding to a preset input position of the touch panel using the screen coordinate values (X, Y) calculated in step S14, and executes the function. To do. Then, it returns to step S11 and repeats the same process.

20 Control unit 30 Coordinate input unit 40 Video signal output unit 50 Storage unit 51 Input coordinate value 52 Display mode 53 Output video resolution 54 Output device resolution 55 Touch panel resolution 56 Display mode determination mark coordinate 57 Coordinate theoretical value 58 Coordinate conversion correction value 60 Coordinate Conversion unit 70 Resolution change notification unit 75 Resolution detection unit 80 Display mode determination unit 85 Correction value selection unit 90 Touch panel unit 91 Input position detection unit 92 Coordinate output unit 100 Display unit 101 Display panel 102 Display control unit

Claims (3)

A display device that displays an image on a screen in any one of a plurality of display modes,
A display unit for displaying video at a predetermined video resolution;
A storage unit that stores a plurality of coordinate conversion correction values associated in advance with the display mode and video resolution;
A touch panel unit that is arranged on the screen of the display unit and outputs input coordinates of a position on the screen that is contact-input based on a predetermined touch panel resolution;
A resolution detector for detecting that the video resolution has been changed;
A resolution change notification unit for displaying a video on which a determination mark is displayed at a predetermined position on the screen on the display unit when it is detected that the video resolution has been changed;
A display mode determination unit that determines a current display mode based on an input coordinate value corresponding to a touch panel resolution that is output from the touch panel unit when the position of the displayed determination mark is touched;
Correction value selection for selecting a coordinate conversion correction value associated with the detected video resolution after change and the determined display mode from among a plurality of coordinate conversion correction values stored in the storage unit And a display device.   When the position on the screen of the display unit is touch-input using the coordinate conversion correction value selected by the correction value selection unit, the input coordinate value corresponding to the touch panel resolution output from the touch panel unit, The display device according to claim 1, further comprising a coordinate conversion unit that converts a screen coordinate value indicating a screen position of the display unit. For each of the plurality of display modes, a coordinate coordinate value obtained by converting a screen coordinate value of a determination mark displayed at a predetermined position on the screen of the display unit into an input coordinate value corresponding to the touch panel resolution is stored in the storage unit. Remember,
The display mode determination unit compares an input coordinate value corresponding to a touch panel resolution at the position of the determination mark input by contact with a theoretical coordinate value for each display mode stored in the storage unit, and the input coordinate The display device according to claim 1, wherein the display mode of the coordinate theoretical value closest to the value is determined as the current display mode.

Images