JP2001117693A - Display device and display control method for the same and storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device always clearly displaying which window is in an active state at present, even when plural windows are opened, and the display control method of the display device, and a storage medium. SOLUTION: Whether image data inputted from an inputting device are image data to be displayed in an active window is decided. An input control part 20 controls the inputting timing of the image data inputted from the inputting device based on the decided result. Then, the inputted image data are subjected to image processing by an image processing part 28. Then, the image data which are image processed are displayed on a display 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a display device capable of displaying a plurality of windows on a display screen, a display control method thereof, and a storage medium.

[0002]

2. Description of the Related Art Conventionally, in a computer which is used by connecting a display device or has a built-in display device,
An OS having a multi-window function capable of displaying a plurality of windows on one large screen / high definition display screen is used. When a plurality of windows are displayed on one display screen, the window is activated by moving a cursor that moves on the display screen to a desired window in accordance with the operation of a pointing device such as a mouse. (Which window is being accessed), and data processing is performed in the active window (hereinafter referred to as an active window).

[0003]

However, if a plurality of windows are opened at the same time and all the windows are moving images, the user is confused about what to pay attention to. Conversely, even if you are not confused, if there is a window that moves faster than the current video you are watching,
There were many phenomena in which the line of sight shifted to that side and it was not possible to pay attention to the windows that had to be paid attention to.

[0004] The present invention has been made in view of the above problems, and a display device capable of always clearly displaying which window is currently active even when a plurality of windows are opened. And a display control method and a storage medium therefor.

[0005]

A display device according to the present invention for achieving the above object has the following arrangement. That is, a display device capable of displaying a plurality of windows on a display screen, wherein a connection means for connecting a plurality of types of input devices, and image data input from the input device connected to the connection means are stored in the active window. Determining means for determining whether or not the image data is to be displayed, and input control for controlling input timing of image data input from an input device connected to the connecting means based on the determination result of the determining means Means, image processing means for performing image processing on the image data input from the input control means, and display means for displaying the image data processed by the image processing means.

[0006] Preferably, the input timing is a predetermined timing.

Preferably, the apparatus further comprises setting means for setting the input timing.

Preferably, the image processing apparatus further comprises a brightness control means for controlling the brightness of the image data input from the input control means based on a result of the determination by the determination means.

A display control method according to the present invention for achieving the above object has the following arrangement. That is, a display control method capable of displaying a plurality of windows on a display screen,
A connecting step of connecting a plurality of types of input devices; a determining step of determining whether image data input from the input device connected to the connecting step is image data to be displayed in an active window; An input control step of controlling input timing of image data input from an input device connected to the connection step based on a determination result of the step, and an image processing of performing image processing on the image data input from the input control step And a display step of displaying the image data image-processed in the image processing step.

A storage medium according to the present invention for achieving the above object has the following configuration. That is, a storage medium that stores a program related to display control in a form readable by a computer connected to or incorporated in a display device capable of displaying a plurality of windows on a display screen. A connection step of connecting an input device, a determination step of determining whether image data input from the input device connected to the connection step is image data to be displayed in an active window, and a determination of the determination step Based on the result, an input control step of controlling input timing of image data input from an input device connected to the connection step, and an image processing step of performing image processing on the image data input from the input control step, A display step of displaying the image data subjected to the image processing in the image processing step.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 1 is a block diagram showing a configuration of an information processing system of Embodiment 1.

Reference numeral 1 denotes a first host computer (PC1) capable of outputting analog data, and has a built-in CPU, RAM, ROM, and the like (not shown). Reference numeral 2 denotes a VHF tuner that receives a terrestrial broadcast wave. A video signal output device 3 outputs a video signal. Reference numeral 4 denotes a CS tuner whose output is an SD (Standard Definition) satellite broadcast wave. Reference numeral 5 denotes a second host computer (PC2) capable of outputting digital data, similar to the first host computer 1, including a CPU, a RAM,
Built-in ROM etc. 6 is a graphic control unit,
A signal from each of the connected devices is input. 7 is CR
It is a display device including a T, an LCD, and the like, and displays an image based on image data output from the graphic control unit 6.

The first host computer 1 has a signal line L1
Is connected to the graphic control unit 6 via the control unit 6 and sends analog data to the graphic control unit 6 via the signal line L1. The VHF tuner 2 receives the terrestrial broadcast wave to the graphic control unit 6 via the signal line L2, similarly, the video 3 receives the video signal to the graphic control unit 6 via the signal line L3, and the CS tuner 4 receives the video signal. To the graphic controller 6 via the signal line L4,
The second host computer 5 transmits the digital data to the signal line L
5 to the graphic control unit 6.

The graphic control unit 6 processes the input plural types of image data into optimal image data, and displays the image data on the display unit 7 via the signal line L6. The display 7 can display an image having a resolution of, for example, 3200 dots × 2400 dots or more. The display mode has a function of selecting only one of a plurality of input data and displaying a full screen, or a function of selecting a plurality of input data and displaying a plurality of windows such as a two-screen display or a four-screen display.

For example, only the image data from the first host computer 1 is sent to the display 7 via the graphic controller 6.
Can be displayed above. In addition, the satellite broadcast wave received by the CS tuner 4 and the image data from the first host computer 1 are displayed on the display unit 7 on the display unit 7 on the display 7 via the graphic control unit 6. Can be.

Next, the graphic control unit 6 of the first embodiment
Will be described with reference to FIG.

FIG. 2 is a block diagram showing a detailed configuration of the graphic control unit according to the first embodiment.

Now, image data (for example, analog RGB, resolution XG) output from the first host computer 1
A (1024 × 768), frequency 65 MHz) is connected to the input control unit 20 via the signal line L1. The input control unit 20 is also a control circuit under the control of the microcomputer (MPU) 21 for limiting the capture of image data and controlling the peripheral circuit unit.

If the signal line L21 changes from logic "1" to logic "0" in response to a control signal from the MPU 21, the down counter 22 outputs a predetermined value (for example,
(1 second), and the MPU 21 is notified via the signal line L22 every time a borrow signal is generated. Thereby, the MPU 21 determines which input data is to be controlled,
Control is performed via the signal line L23.

A trigger for directly controlling the MPU 21 is issued at the command level by the second host computer 5 via a signal line (not shown) different from the signal line L5, for example, in accordance with an instruction from a remote controller.

The image data input to the input control unit 20 via the signal line L1 is under the control of the MPU 21. The configuration inside the input control unit 20 is composed of an analog switch, a high-speed switching element, or the like.

The image data that has passed through the input control unit 20 is
An analog / digital converter (A) is connected via a signal line L201.
/ D converter) 23. Here, the input image data is converted into a digital signal for an analog signal.
The converted digital signal is connected to the image processing unit 28 via the signal line L211.

The image processing section 28 stores the received digital signal in an image memory 28a under the control of the MPU 21 (signal lines are not shown). The stored digital signal is subjected to resolution conversion such as up-scaling or down-scaling in accordance with the screen size and display window size of the display 7, and is switched via the signal line L 216.
9 is sent.

Similarly, image data from the VHF tuner 2 is sent to the input control unit 20 via the signal line L2, and sent to the signal line L202 via the inside of the input control unit 20.

Then, as described above, the analog / digital converter (A / D converter) 24 converts the analog signal into a digital signal, and sends it out to the image processing unit 28 via the signal line L212. Then, the image data is stored in the image memory 28a, and resolution conversion is performed as needed. The resolution-converted digital signal is transmitted to the switching control unit 29 via the signal line L217 as described above.

The image data (video signal) from the video signal output device 3 is input to the input control unit 20 via the signal line L3.
To the signal line L203 via the input control unit 20.

Then, the video signal input to the video decoder 25 via the signal line L203 is format-converted and sent out to the image processing unit 28 via the signal line L213. The image processing unit 28 stores the video signal in the image memory 28a and performs image processing as necessary (for example, upscaling, downscaling,
Or perform a scaling function). After that, the signal line L21
8 and transmitted to the switching control unit 29.

The satellite broadcast wave (digital image data) digitally processed by the CS tuner 4 is supplied to a signal line L4.
Is transmitted to the input control unit 20 via the input control unit 20, and is transmitted to the signal line L204 via the input control unit 20. Then, the signal line L2
The digital image data input to the format conversion circuit 26 via the signal line 04 has a digital signal level L.
Conversion processing is performed for VDS (Low Voltage Differential Signaling). After that, the image data sent to the image processing unit 28 via the signal line L214 is stored in the image memory 28a, and image processing such as resolution conversion is performed as needed. Image data that has been subjected to image processing
The signal is sent to the switching control unit 29 via the signal line L219.

The image data from the second host computer 5 is sent to the input control unit 20 via the signal line L5, and sent to the signal line L205 via the inside of the input control unit 20. Note that the signal level on the signal line L205 here is TMDS (Transition Minimized Differential Sig).
nalng). This is a digital standard for transmitting digital signals.

The digital image data input to the format conversion circuit 27 via the signal line L205 has a digital signal level, and is therefore subjected to conversion processing. Thereafter, the image processing unit 2 is connected via the signal line L215.
The image data sent to 8 is stored in an image memory 28a, and image processing such as resolution conversion is performed as necessary. The image data subjected to the image processing is transmitted to a signal line L220.
Is transmitted to the switching control unit 29 via

As described above, the first host computer 1,
Each image data from the VHF tuner 2, the video signal output device 3, the CS tuner 4, and the second host computer 5 is sent to the switching control unit 29 via the signal lines L1 to L5, the input control unit 20, and the image processing unit 28. It is connected.

The switching control unit 29 selectively extracts an image from the above-mentioned plurality of input image data, and outputs a signal line L221.
To the interface circuit (I / F) 30 via the
Note that the MPU 21 knows the currently accessed window, the window size, and the physical position of the window. Therefore, the MPU 21 processes the input image data in the interface circuit 30 according to the display format of the display 7 and displays the processed image data on the display 7 via the signal line L6.

Next, the display screen of the display 7 of the first embodiment will be described with reference to FIG.

FIG. 3 is a diagram showing a display screen of the display device of the first embodiment.

Here, four windows are displayed on the display device 7. For example, the window 41 displays the image of the first host computer 1, and the window 42 displays the VHF.
The terrestrial broadcast video of tuner 2 is displayed and window 4
Reference numeral 3 indicates that a reproduced image of the video signal output device 3 is displayed, and further, a window 44 displays a satellite broadcast wave image of the CS tuner 4.

In such a display state, the window 43 is to be watched out of the four windows which the viewer should pay attention to. That is, a window that displays a reproduced image of the video signal output device 3 is a target of attention.

The means for selecting a plurality of windows on the display 7, that is, the means for selecting an active window, is easily selected by the viewer using a selection number or a cursor (not shown) on a remote controller (not shown). be able to.

By the above selection operation, the MPU 21 activates the counter 22 via the signal line L21. In response, the counter 22 starts subtraction. The initial value is set in advance, and for example, a numerical value of one second is set.

Thereafter, the counter 22 starts subtracting one by one, and when a borrow signal is generated, the result is sent to a signal line L22.
To the MPU 21 via. Upon receiving this notification, the MPU 21 controls the opening and closing of the signal gate on each signal line input to the input control unit 20 via the signal line L23. However, since the window 43 is a target, the signal gate on the signal line L3 is always opened.

Next, the counter 22 again calculates the result of the subtraction,
When a borrow signal is generated on the signal line L22, the input control unit 20 opens the signal gate for capturing the image of one frame again for the closed signal gate, and performs a process of capturing the image data.

When the image data for one frame has been captured, the MPU 21 again closes the signal gate in the graphic control unit 20 via the signal line L23.

As described above, whenever the signal (borrow signal) on the signal line L22 from the counter 22 changes, (1)
At intervals (seconds), the gates in the input control unit 20 repeat opening and closing (however, signal gates for inputting image data of interest) are excluded).

By such control, image data other than the image data of interest is sampled at certain intervals, that is, thinned out. This allows
Even if the input image data is a moving image, the viewer recognizes it as a still image.

Next, the processing flow of the processing executed in the first embodiment will be described with reference to FIG.

FIG. 4 is a flowchart showing the processing flow of the processing executed in the first embodiment.

FIG. 4 shows the processing flow of the basic operation for realizing FIG. 3 (four screen multi-window).

First, the MPU 21 determines whether or not to activate the multi-window according to an instruction from the viewer (step S1). If the multi-window is not executed (NO in step S1), the process ends. On the other hand, when executing multi-window (YE in step S1)
S), and proceed to step S2.

When executing the multi-window, it is determined whether or not all the multi-windows are to be displayed in real time, that is, it is determined whether or not there is an active window of interest (step S2). If all the multi-windows are displayed in real time, that is, if there is no active window (NO in step S2), the process ends. On the other hand, when all the multi-windows are not displayed in real time, that is, when there is an active window (YES in step S2), the process proceeds to step 3.

If there is an active window of interest, the MPU 21 checks which window is to be activated. Then, a numerical value is set in the counter 22. In this case, the MPU 21 sets a binary number corresponding to one second to a register in the counter 22 via the signal line L21 (Step S3). The value once set is automatically reloaded in the counter 22 when the borrow signal is generated.

Next, an operation of controlling the gate control circuit in the input control section 20 is performed (step S4). First, MPU
21 executes control for validating only image data corresponding to the active window among image data (signal lines L1 to L5) input via the signal line L23. Thus, only the active window (for example, only the image data on the signal line L3 is valid) is always displayed on the display 7 in real time.

When the control is completed, the counter 22 is decremented by 1 (step S5).

Next, it is determined whether a borrow signal generated by the counter 22 has been notified to the MPU 21 via the signal line L22 (step S6). When the borrow signal has not been generated (NO in step S6), the process proceeds to step S5. On the other hand, when the borrow signal is generated (YES in step S6), the process proceeds to step S7, and the MPU 21 sets the signal line L
The signal gate of the input control unit 20 is opened via 23, and the input image data corresponding to the inactive window is fetched (step S7).

Next, when the capture of one frame of image data corresponding to the inactive window is completed, the advance gate of the input control unit 20 is closed again (step S8). The captured image data is stored in the image processing unit 2.
8 is stored in the image memory 28a.

Next, the image data corresponding to the inactive window is sequentially retrieved from the image memory 28a in the image processing section 28 and displayed on the display 7 (step S1).
0).

As described above, according to the first embodiment, when a multi-window is displayed on one display 7, images in non-active windows other than the active window of interest are thinned out. By displaying, viewers will not be distracted,
The active window to be noticed can be noticed, and the multi-window can be used effectively. (Second Embodiment) In a second embodiment, a modification of the graphic control unit 6 of the first embodiment will be described. In particular,
In the graphic control unit of FIG. 2 of the first embodiment, the counter value of the counter 22 is fixed at a predetermined value (1 second), but in the second embodiment, the viewer can set an arbitrary value.

FIG. 5 is a block diagram showing a detailed configuration of the graphic control unit according to the second embodiment.

As shown in FIG. 5, in the second embodiment, the MP
A signal line L25 capable of communicating with U21 is configured. The signal line L2 enables direct access to the MPU 21 from the outside, and a counter value can be input from a keyboard (not shown) or a remote controller (not shown) connected to the terminal device.

As an input method, for example, a remote control is used to display an OSD (on-screen
The counter value to be set is displayed on the display, and an arbitrary count value is input by allowing the viewer to select the counter value.
That is, it can be realized by the same input method as when setting the volume, hue, brightness, contrast, etc. on a general television.

The counter value set by the viewer is sent to the MPU 21 via the signal line L25 as a command.
In response, the MPU 21 sets an arbitrary counter value on a signal line L21 in a register (not shown) in the counter 22.

As described above, according to the second embodiment, by arbitrarily changing the frame thinning time of an image in an inactive window other than the active window of interest, the viewer can select the desired time depending on the purpose. An arbitrary frame thinning time can be selected, and the multi-window can be effectively used. (Embodiment 3) In the above embodiment, four windows are opened on the display 7 as a multi-window, only the active window of interest is displayed in real time, and the remaining inactive windows are thinned out by frames. Even a moving image is displayed on a still image basis.

However, according to the present invention, not only one window of interest but also two or three windows are considered.
For example, an arbitrary number of windows can be set as a target. That is, it is possible to arbitrarily select a window to be displayed on one display 7 in real time and a window for thinning out frames. Fourth Embodiment In the first to third embodiments, an image in an inactive window other than the active window is thinned out and displayed, whereby the viewer's attention is easily directed to the active window to be focused. The configuration was adopted. In the fourth embodiment, in addition to the configuration described in the first embodiment, by controlling the luminance of an image in an inactive window other than the active window, the active window to be focused can be more easily focused on the viewer. The configuration to be performed will be described.

Here, in order to compare the fourth embodiment with the conventional example, the display state on the display screen of the conventional display will be described.
This will be described with reference to FIG.

FIG. 6 is a diagram showing a display state on a display screen of a conventional display.

In the figure, A, B,
Four windows C and D are displayed. Each of the windows A, B, C and D has the same window size. As shown in the figure, conventionally, each of the windows A, B, C, and D was displayed at the same luminance, so that it was difficult to visually recognize which window is currently the active window.

FIG. 7 is a diagram showing a display state on the display screen of the display device according to the fourth embodiment.

In FIG. 7, similarly to FIG. 1, four windows A, B, C and D are displayed on the display screen. Of the four windows displayed on the display screen, A is an active window, and the other windows, ie, windows B, C, and D, are inactive windows. In the fourth embodiment, the image in the inactive window is displayed with lower luminance than the image in the active window. In addition, the image in the inactive window is thinned out and displayed.

Next, the graphic control unit 6 of the fourth embodiment
Will be described with reference to FIG.

FIG. 8 is a diagram showing a detailed configuration of the graphic control unit according to the fourth embodiment.

FIG. 8 shows the detailed configuration of the graphic control unit for realizing the display control shown in FIG. The same components as those of the detailed configuration of the graphic control unit 6 shown in FIG. 2 of the first embodiment are denoted by the same reference numerals, and the details are omitted.

In FIG. 8, the switching control unit 29 is controlled by a control signal from the MPU 21 sent via the signal line L24, and sends image data to the luminance conversion circuit 31 via the signal line L221.

The MPU 21 knows the currently accessed window, the window size, and the physical position of the window. Therefore, the MPU 21 uses the current luminance conversion circuit 3 based on the physical position information of the window.
It is determined whether or not the image data being processed corresponds to the active window, and if it corresponds to the inactive window, the luminance level is reduced. For example, the luminance conversion circuit 21 sets the luminance level value of the display data to 32 when the luminance level value of the input image data is 64 and the image data corresponds to the inactive window. Control. As a result, the image data displayed on the display 76 is subjected to luminance conversion,
The information is displayed on the display unit 6 via the signal line L6. It is assumed that the luminance level value of the image data is stored in advance in the image memory 28a, for example.

Next, the processing flow of the processing executed in the fourth embodiment will be described with reference to FIG.

FIG. 9 is a flowchart showing the processing flow of the processing executed in the fourth embodiment.

Note that the same processes as those in the flowchart of FIG. 4 of the first embodiment are denoted by the same reference numerals, and the details are omitted.

After the processing in step S9, the brightness level value of the image data is called by the MPU 5 (step S9).
9a). Next, the luminance level value is halved (step S9b). Next, the decimal portion of the obtained luminance level value is discarded (step S9c). Then, using the obtained brightness level value, the image data corresponding to the inactive window is stored in the image memory 2 in the image processing unit 28.
8a, and sequentially display them on the display 7 (step S10a).

As described above, according to the fourth embodiment, when a multi-window is displayed on one display 7, the image in the active window has the brightness level value determined for that window. The image in the inactive window is displayed by halving the luminance level value determined for the window and by thinning out the frame. Therefore, the viewer of the display device can accurately grasp the currently accessed window.

Even if the present invention is applied to a system including a plurality of devices (for example, a host computer, an interface device, a reader, a printer, etc.), a device including one device (for example, a copying machine, a facsimile machine) Etc.).

Further, an object of the present invention is to supply a storage medium storing a program code of software for realizing the functions of the above-described embodiments to a system or an apparatus, and to provide a computer (or CPU) of the system or the apparatus.
And MPU) read and execute the program code stored in the storage medium.

In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiment, and the storage medium storing the program code constitutes the present invention.

As a storage medium for supplying the program code, for example, a floppy disk, hard disk, optical disk, magneto-optical disk, CD-ROM, CD
-R, a magnetic tape, a nonvolatile memory card, a ROM, or the like can be used.

When the computer executes the readout program code, not only the functions of the above-described embodiment are realized, but also the OS (Operating System) running on the computer based on the instruction of the program code. ) May perform some or all of the actual processing, and the processing may realize the functions of the above-described embodiments.

Further, after the program code read from the storage medium is written into a memory provided on a function expansion board inserted into the computer or a function expansion unit connected to the computer, based on the instruction of the program code, It goes without saying that the CPU included in the function expansion board or the function expansion unit performs part or all of the actual processing, and the processing realizes the functions of the above-described embodiments.

When the present invention is applied to the storage medium, the storage medium stores program codes corresponding to the flowcharts shown in FIGS. 4 and 9 described above.

[0084]

As described above, according to the present invention,
Even when a plurality of windows are opened, it is possible to provide a display device, a display control method thereof, and a storage medium which can always clearly display which window is currently active.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an information processing apparatus according to a first embodiment.

FIG. 2 is a block diagram illustrating a detailed configuration of a graphic control unit according to the first embodiment.

FIG. 3 is a diagram illustrating a display screen of a display device according to the first embodiment.

FIG. 4 is a flowchart illustrating a processing flow of processing executed in the first embodiment.

FIG. 5 is a block diagram illustrating a detailed configuration of a graphic control unit according to a second embodiment.

FIG. 6 is a diagram showing a display state on a display screen of a conventional display.

FIG. 7 is a diagram illustrating a display state on a display screen of a display device according to a fourth embodiment.

FIG. 8 is a diagram illustrating a detailed configuration of a graphic control unit according to a fourth embodiment.

FIG. 9 is a flowchart illustrating a processing flow of processing executed in a fourth embodiment.

[Explanation of symbols]

 Reference Signs List 1 PC1 2 VHF tuner 3 Video 4 CS tuner 5 PC2 6 Graphic control unit 7 Display 20 Input control unit 21 MPU 22 Down counter 23, 24 A / D converter 25 Video decoder 26, 27 Format conversion circuit 28 Image processing unit 28a Image memory 29 Switching control unit 30 Interface circuit 31 Brightness conversion circuit

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 5/45 H04N 5/66 D5 / 66 G09G 5/00 520W F-term (Reference) 5C025 BA21 BA27 BA28 CA02 CB10 DA01 DA04 DA08 5C058 BA05 BA24 BA25 BB13 BB19 5C082 AA01 AA02 AA39 BA12 BA27 BA29 BA42 BB03 BB15 BD09 CA11 CA64 CA84 DA51 MM09 MM10 5E501 AA02 AC37 BA05 BA09 CA03 CB12 FA06 FA46 FB28 FB43

Claims (9)

[Claims] 1. A display device capable of displaying a plurality of windows on a display screen, comprising: connecting means for connecting a plurality of types of input devices; and image data input from the input device connected to the connecting means. Determining means for determining whether the data is image data to be displayed in an active window; and controlling input timing of image data input from an input device connected to the connecting means based on a determination result of the determining means. Display control means for performing image processing on image data input from the input control means, and display means for displaying image data processed by the image processing means. apparatus. 2. The display device according to claim 1, wherein the input timing is a predetermined timing. 3. The display device according to claim 1, further comprising setting means for setting the input timing. 4. The image processing device according to claim 1, further comprising: a brightness control unit configured to control a brightness of the image data input from the input control unit based on a determination result of the determination unit. The display device according to claim 1. 5. A display control method capable of displaying a plurality of windows on a display screen, comprising: a connection step of connecting a plurality of types of input devices; and image data input from the input devices connected to the connection step. A determination step of determining whether or not is image data to be displayed in the active window; and, based on a determination result of the determination step, an input timing of image data input from an input device connected to the connection step. An input control step of controlling; an image processing step of performing image processing on the image data input from the input control step; and a display step of displaying the image data processed in the image processing step. Display control method. 6. The display control method according to claim 5, wherein the input timing is a predetermined timing. 7. The display control method according to claim 5, further comprising a setting step of setting the input timing. 8. The image processing method according to claim 5, wherein the image processing step further includes a luminance control unit that controls the luminance of the image data input from the input control unit based on a result of the determination by the determination unit. Display control method described in 1. 9. A storage medium for storing a program related to display control in a format readable by a computer connected to or incorporated in a display device capable of displaying a plurality of windows on a display screen, wherein the program is: A connection step of connecting a plurality of types of input devices; a determination step of determining whether image data input from the input device connected to the connection step is image data to be displayed in an active window; An input control step of controlling an input timing of image data input from an input device connected to the connection step based on a determination result of the step, and an image processing step of performing image processing on the image data input from the input control step And a display step of displaying image data image-processed in the image processing step.