JPH09160746A - Image display device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure an easy-to-see scroll display for user. SOLUTION: If a request is received to scroll a screen toward an arrow in state (a) where an image A is displayed, an image B existing at the scrolling destination is moved in the scrolling direction (arrow direction) to be put on the image A with the position of the image A kept as it is as shown in (b). The overlapping area of both images A and B is increased with time as shown in (c), and the scrolling operation equivalent to a single screen ends when the image A is completely hidden by the image B. When the scroll input is performed in the state (a), the scrolling operation is discontinued while the image B is written in a RAM. Thus, user can easily see the display of images.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display device and an image display method, and more particularly to an image display device and an image display method capable of displaying an image while scrolling.

[0002]

2. Description of the Related Art Conventionally, there is known a display device in which a part of a large image is displayed on a screen and the displayed content is changed by scrolling the image.

Referring to FIG. 26 (a), it is assumed that an image 54 including the character "A" is displayed on a display screen 55 composed of horizontal 320 dots and vertical 240 dots of a conventional display device.

At this time, when an instruction is given to scroll the display contents in the downward direction (arrow direction), FIG.
As shown in (b), the image 54 moves downward in its entirety, and a new image (here, an image containing the letter “B”) 52 is displayed in place of the image 54 while moving downward. .

When the scroll is further continued, FIG.
As shown in (c), the image 54 including the character “A” disappears completely outside the display screen 55, and the image 52 including the character “B” is displayed on the display screen 55.

In order to realize such scrolling,
The conventional display device is shown in FIG.
0 in memory.

Scrolling is performed by moving an area (hereinafter referred to as "display area") 55 in which an image is displayed on the display screen within the virtual drawing area.

For example, in the scrolling example shown in FIG. 26, a virtual drawing area 50 is previously set as shown in FIG.
Part 54 containing "A" and part 5 containing the character "B"
2 and 2 exist. By moving the display area 55 from the bottom to the top in the virtual drawing area 50, scrolling as shown in FIG. 26 is executed.

[0009]

In these conventional image display devices, scrolling is performed by continuously moving the display area in small steps. If these display areas are moved at high speed, the moving screen becomes difficult for the user of the apparatus to see.

By further increasing the moving speed,
If the time during which an image of one frame is displayed is shorter than the time after which the afterimage phenomenon of the human eye occurs, the screen becomes more difficult for the user of the apparatus to see.

That is, the conventional display device has a problem that the screen becomes difficult to see when the scrolling speed is increased.

The present invention has been made to solve such a problem, and an object thereof is to provide an image display device and an image display method in which a user can easily see a scroll screen.

[0013]

In order to solve the above problems, an image display apparatus according to claim 1 stores a first image and a second memory. Second
Of the storage means and display means capable of displaying at least a part of the second image on the first image in the display area, and the storage area of the first image and the second image. Moving means for moving the second image with respect to the first image so as to increase the area.

In the image display device according to the first aspect, unlike the conventional scrolling method, the first displayed image is displayed.
At least a part of the second image to be scrolled is displayed so as to be superimposed on the image. Further, the area of the overlapping area between the images is controlled so as to increase with time.

This makes it easier for the user to see the scroll display. The image display device according to claim 2,
The image display device according to claim 1, further comprising input means for inputting a scroll direction, and a direction in which the second image is moved by the moving means is a direction corresponding to the input scroll direction.

According to the image display device of the second aspect,
Since the second image moves in the direction corresponding to the input scroll direction, the user can clearly understand the positional relationship between the first image and the second image, and the usability of the device is improved. .

An image display device according to a third aspect is the image display device according to the second aspect, wherein the moving means receives the second scroll after a predetermined time has elapsed after the scrolling direction is input by the input means. The image is moved with respect to the first image.

According to the image display device of the third aspect,
Since the image is moved after a predetermined time has elapsed after the input of the scroll direction by the input means, the visibility of the image is improved.

An image display device according to a fourth aspect is the image display device according to the third aspect, wherein the predetermined time is a time for the second storage means to store the second image.

In the image display device according to the fourth aspect, the second
Since the time required for the storage means to store the second image corresponds to the time until the second image is moved with respect to the first image after input in the scroll direction by the input means, Improves efficiency.

An image display device according to a fifth aspect is the image display device according to any one of the first to fourth aspects, in which the display means fixes and displays the first image.

An image display device according to a sixth aspect of the present invention includes scroll display means for displaying an image while scrolling the image.
And a control means for controlling the scroll display means so that the scroll is performed intermittently.

In the image display device according to the sixth aspect, the scrolling operation is performed intermittently, so that the visibility of the scrolled image is improved for the user.

According to another aspect of the image display device of the present invention, a first storage means for storing the first image, a second storage means for storing the second image, and a predetermined area in the display area are provided. A display unit capable of displaying the first image and displaying the second image in a region other than the predetermined region in the display region, an input unit for inputting a scroll direction, and an area of the predetermined region are enlarged. Thus, there is provided a moving unit that moves the boundary between the predetermined area and the area other than the predetermined area in the direction corresponding to the input scroll direction.

In the image display device according to the seventh aspect, the boundary between the area in which the first image is displayed and the area in which the second image is displayed moves in the input scroll direction. This allows the user to easily identify the scroll direction.

In the image display method according to the eighth aspect, the first image is displayed, the scroll direction is input, the second image corresponding to the input scroll direction is acquired, and the displayed first image is displayed. A part of the acquired second image is overlaid on the image and displayed, and the second image overlaid on the first image is slid in the direction corresponding to the input scroll direction to display the first image. The overlapping area with the image of is increased.

According to the image display method of claim 8,
The displayed image is easy for the user to see, and the scroll direction can be easily grasped.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION Next, preferred embodiments of the present invention will be described in detail with reference to the drawings. The same reference numerals in the drawings indicate the same or corresponding parts.

(First Embodiment) FIG. 1 shows a first embodiment of the present invention.
3 is a block diagram showing a configuration of an image display device in the embodiment of FIG.

Referring to the figure, the image display device 1 includes a display (CRT) 12 for displaying an image, a CD-ROM 8 for storing the image displayed on the display 12, and various programs for operating the device. ROM 6 to store
A RAM 4 for temporarily storing an image, a joystick 10 for inputting a scroll direction from a user, and a CPU 2 for controlling the entire apparatus by performing various calculations and the like.

Next, scroll display performed by the image display device of FIG. 1 will be described. Referring to FIG. 2, the CRT 12
It is assumed that the image 20 including the character "A" is displayed in the display area 55 of.

At this time, the joystick 1 from the user
When it is requested to scroll the contents displayed on the CRT in the downward direction (arrow direction) via 0,
The image data 21 newly displayed by the scroll in the input scroll direction is the CD-ROM 8
Read from.

The read image data 21 is stored in the RAM 4
Drawn inside. If the drawing of the image 21 on the RAM 4 is finished, referring to FIG. 3, the position of the image 20 in the display area 55 remains unchanged, and the image 2 including the character “B” is displayed.
1 is superimposed on the image 20 including the character "A" while sliding in the direction of the arrow.

The overlapping area of the image 21 and the image 20 becomes larger with the lapse of time, and after the state of FIG. 4, the display area 55 finally includes the character "B" as shown in FIG. Only the displayed image 21 will be displayed.

FIGS. 6A and 6B are timing charts from the acceptance of the scroll request to the scrolling for one screen, wherein FIG. 6A is a timing chart in the image display device according to the present embodiment, and FIG. A timing chart is shown.

In the figure, time t0 indicates the time when a scroll request for scrolling one screen is issued, and time t2 indicates the time when the scroll for one screen ends.

With reference to FIG. 3A, the image display device of the present embodiment has a time t0 when a scroll request is issued.
From time t1 to time t1, the image to be displayed by scrolling (image 21 in FIG. 2) is drawn. The screen stops during the period when this drawing is performed.

From the time t1 when the drawing ends to the time t2, scrolling for one screen (scrolling shown in FIGS. 2 to 5) is performed.

When a request for further scrolling is issued at time t2, scrolling is performed after drawing an image to be further displayed by scrolling.

That is, when scrolling for several screens is performed, the period for drawing and the period for scrolling are repeated. Since the movement of the image is stopped during the drawing period, the display is easy for the user to see even if the scrolling is performed at high speed.

In the prior art with reference to FIG. 1B, the scroll is continuously performed from the time t0 when the scroll request is issued to the time t2 when the scroll ends.

That is, in the prior art, when scrolling for several screens was continuously performed, the user had to keep watching the continuously changing display. Therefore, there is a problem that the user's eyes are heavy and the display is difficult to see.

In order to make the scroll speed the same as that of the prior art in this embodiment, the scroll speed may be adjusted as follows.

The scroll speed in the prior art is 12
It is assumed that it is 0 [dot / sec]. At this time, when the screen size is configured by 240 dots in the vertical direction as shown in FIG. 26A, it takes 2 seconds from the formula (1) to scroll one screen in the vertical direction. Was.

240 [dots] / 120 [dots / second] = 2 [seconds] (1) In the present embodiment, one screen is scrolled in 2 seconds, and one screen is scrolled. When the time required for drawing (t0 to t1 in FIG. 6) is 1.5 seconds, it is necessary to scroll 240 dots in 0.5 second.

That is, according to the equation (2), 480 is obtained during the scrolling period (t1 to t2 in FIG. 6).
It suffices to perform scrolling at a scroll speed of [dots / second].

240 [dot] /0.5 [second] = 480 [dot / second] (2) As a result, scrolling of 240 dots in 2 seconds, that is, scrolling at an average speed of 120 [dot / second] is executed. .

Further, the scroll performed by the image display device according to the present embodiment has an effect that the burden of drawing processing is small. This point will be described below.

Referring to FIG. 7, the CD-R is displayed on the display screen 20.
It is assumed that a portion including the character "A" in the image data 51 stored in the OM is displayed and a scroll request is made in the arrow direction.

At this time, in the prior art, scrolling is executed by displaying an image on the display screen as shown in FIGS. 8 (a) to 8 (c).

Referring to FIG. 8, the image A shown in FIG.
From the state where is displayed, the entire image moves in the direction of the arrow, and while displaying a part of each of image C and image I as shown in (b) and (c), The scroll is executed.

When the scroll for one screen is completed, only the image B is displayed on the display screen.

That is, as shown in FIG. 10, image A
By the time one screen is scrolled diagonally from the state where is displayed and the state where image B is displayed, a total of one screen of the diagonal half of image C and the diagonal half of image I is displayed. Will be displayed extra.

Referring to FIG. 9, in the image display device of the present embodiment, image B is slid on image A and superimposed.

Therefore, as shown in FIG. 11, the images displayed on the display screen are only images A and B. Therefore, an unnecessary image (such as a part of the image C or the image I) is not displayed unlike the related art.

As a result, in the image display device according to the present embodiment, it is possible to reduce the drawing load when scrolling in an oblique direction.

(Second Embodiment) The device configuration of the image display device according to the second embodiment of the present invention is substantially the same as the device configuration of the image display device according to the first embodiment. , Description will not be repeated here.

The scroll operation performed by the image display device according to the second embodiment will be described below.

Referring to FIG. 13 (a), the display screen is displayed horizontally 3
It is assumed that the image 20 including the character "A" composed of 20 dots and 240 dots vertically is displayed. At this time, when there is a request to scroll the screen in the arrow direction, the image 22 to be displayed by scrolling is written in the RAM as shown in FIG.
The movement of the screen is stopped within the period in which the image is written.

The image to be written is half the image displayed on the display screen. That is, the image 20 displayed on the display screen is composed of 240 dots vertically and 320 dots horizontally as shown in FIG. On the other hand, the image to be displayed by scrolling is an image composed of 120 dots vertically and 320 dots horizontally as shown in FIG.

The scrolling is performed after the image writing is performed on the RAM. The scroll is shown in Figure 12 (c).
Part of the image displayed on the screen, and RA
The image written in M is superimposed on the portion shown in FIG.

Specifically, as shown in FIG. 13 (a), a scroll request is made in the direction of the arrow while the image including the character "A" is displayed on the display screen 20. Is displayed, the scroll destination image (image 22 in FIG. 12) is drawn, and then the upper half 30 of the displayed image is slid so as to be superimposed on the lower half 32. .

Along with this slide, the drawn image is displayed. That is, the contents displayed on the display screen are as shown in FIG.
After the steps (b) and (c), the state shown in FIG. 14 is obtained.
This completes scrolling for half a screen.

When scrolling is further performed in the same direction from the state shown in FIG. 14, the half-screen image 34 of the scroll destination is drawn as shown in FIG. 15, and the scrolling is similarly continued. .

In the present embodiment, scrolling is performed with half cycle drawing and half screen moving as one cycle. Therefore, the time required for drawing in one cycle and the time required for moving the screen may be half the time in the first embodiment.

(Third Embodiment) The device configuration of the image display device according to the third embodiment is substantially the same as that of the image display device according to the first embodiment. Will not be repeated.

The scroll operation performed by the image display device according to the present embodiment will be described below.

With reference to FIG. 17, it is assumed that an image 40 "A" is displayed on the display screen and there is a request to scroll the image in the arrow direction.

At this time, as shown in FIG. 16, the image 42 for one screen at the scroll destination is written in the RAM.

After writing is performed, scrolling is executed. At the start of scrolling, the image shown in FIG. 17 is displayed, and at the end of scrolling, R
The image 42 written in the AM will be displayed as shown in FIG.

During the transition from the state of FIG. 17 to the state of FIG. 20, the screens shown in FIGS. 18 and 19 are displayed.

That is, a part of the image 40 "A" and a part of the image 42 "B" are displayed on the scrolling display screen.

Image 42 of "B" over time
The area where is displayed becomes wider, and on the contrary, "A"
The image is displayed such that the displayed area of the image 40 becomes smaller.

The boundary 45 between the area where the image 40 of "A" is displayed and the area where the image 42 of "B" is displayed faces in the requested scroll direction (the arrow direction in FIG. 17). To move.

Similarly, referring to FIG. 21 (a), when a request is made to scroll the screen in the direction of the arrow, after the image for one screen to be scrolled is drawn,
As shown in FIG. 6B, the display is switched so that the boundary between the image 40 initially displayed and the image 42 at the scroll destination moves in the scroll direction. As a result, when the scroll ends, the image of the scroll destination shown in FIG. 21C is displayed. This makes it possible to provide an image display device in which the user can easily see the scroll direction.

(Fourth Embodiment) Since the apparatus configuration of the image forming apparatus in the fourth embodiment is the same as the apparatus configuration of the image forming apparatus in the first embodiment, a description thereof will be given here. Do not repeat.

The scroll operation performed by the image display device according to the present embodiment will be described below.

It is assumed that a scroll request is made in the arrow direction from the state where the image 40 including "A" shown in FIG. 22 is displayed.

At this time, the display is stopped for a predetermined time (for example, 0.5 seconds set by the user or the system designer) from the input time.

After the elapse of a predetermined time, the screen is scrolled as shown in FIGS. 23 and 24. That is, the image containing the character “A” and the image 42 containing the character “B” at the scroll destination are displayed while moving in the arrow direction.

When the scroll for one screen is performed, only the image 42 containing "B" is displayed on the display screen.

At this time, if a scroll request is issued in the same direction, the scroll is performed after a further predetermined time has elapsed.

As a result, even in the image display device of the present embodiment, the scroll is stopped for a predetermined time each time one screen is scrolled, so that the display is easy for the user to see.

In the present embodiment, the scrolling is stopped after the scrolling for one screen is performed. However, the scrolling is not limited to one screen, and the amount of scrolling may be half a screen, two screens, or the like. The screen may be paused after the step.

The timing of pausing the screen is not limited to immediately after the scroll request is accepted, and may be performed at any time.

Furthermore, it is possible to use the time for which the screen is temporarily stopped as the time for drawing the image (image 21 in FIG. 2) at the scroll destination.

Further, in the above embodiment, the scroll request is made by the joystick, but another input device may be used, or the scroll may be started at the timing by the CPU.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a device configuration of an image display device according to a first embodiment of the present invention.

FIG. 2 is a diagram for explaining the contents of image data written in a RAM when scrolling the image display device according to the first embodiment.

FIG. 3 is a first diagram for illustrating scrolling performed by the image display device according to the first embodiment.

FIG. 4 is a second diagram for explaining scrolling performed by the image display device according to the first embodiment.

FIG. 5 is a third diagram illustrating scrolling performed by the image display device according to the first embodiment.

FIG. 6 is a timing chart for explaining a relationship between scrolling performed by the image display device according to the first embodiment and scrolling according to a conventional technique.

FIG. 7 is a diagram for explaining an effect of the image display device according to the first embodiment.

FIG. 8 is a diagram showing a screen displayed in diagonal scrolling performed by a conventional technique.

FIG. 9 is a diagram showing a screen displayed in diagonal scrolling performed in the image display device according to the first embodiment.

FIG. 10 is a diagram for explaining the amount of image data displayed when diagonal scrolling is performed in the conventional technique.

FIG. 11 is a diagram for explaining the amount of image data displayed when an image is scrolled diagonally in the image display device according to the first embodiment of the present invention.

FIG. 12 is a diagram for explaining the content of image data written in a RAM during scrolling performed by the image display device according to the second embodiment.

FIG. 13 is a diagram for explaining a scroll screen performed by the image display device according to the second embodiment.

14 is a diagram showing a screen in a state where scrolling is completed from the state shown in FIG.

15 is a diagram showing image data written in the RAM when a scroll request is issued in the arrow direction from the state shown in FIG.

FIG. 16 illustrates an image display device according to the third embodiment, in which R
It is the figure which showed the image data written in AM.

FIG. 17 is a first diagram for explaining diagonal scrolling performed in the image display device according to the third embodiment.

FIG. 18 is a second diagram for explaining the diagonal scrolling performed in the image display device according to the third embodiment.

FIG. 19 is a third diagram for explaining diagonal scrolling performed in the image display device according to the third embodiment.

FIG. 20 is a fourth diagram for explaining the diagonal scrolling performed in the image display device according to the third embodiment.

FIG. 21 is a diagram for describing horizontal scrolling performed in the image display device according to the third embodiment.

FIG. 22 is a first diagram illustrating scrolling performed in the image display device according to the fourth embodiment.

FIG. 23 is a second diagram for explaining scrolling performed in the image display device according to the fourth embodiment.

FIG. 24 is a third diagram for explaining scrolling performed in the image display device according to the fourth embodiment.

[Fig. 25] Fig. 25 is a diagram for describing a method for displaying scrolls in the related art.

FIG. 26 is a diagram for explaining the contents of a screen displayed by scrolling in the conventional technique.

[Explanation of symbols]

 20 Displayed image (first image) 21 Scroll destination image (second image)

Claims (8)

[Claims] 1. A first storage means for storing a first image, a second storage means for storing a second image, and at least a part of the second image on the first image. A display unit capable of displaying the first image and the second image so that the area of the overlapping region of the first image and the second image increases. An image display device comprising: a moving unit that moves the image display device with respect to the image display device. 2. An input unit for inputting a scroll direction is further provided, and a direction in which the second image is moved by the moving unit is
It is a direction corresponding to the input scroll direction,
The image display device according to claim 1. 3. The moving means moves the second image with respect to the first image after a lapse of a predetermined time after the scrolling direction is input by the input means. Image display device. 4. The image display device according to claim 3, wherein the predetermined time is a time for the second storage means to store the second image. 5. The image display device according to claim 1, wherein the display unit fixes and displays the first image. 6. An image display device comprising scroll display means for displaying an image while scrolling the image, and control means for controlling the scroll display means so that the scroll is performed intermittently. 7. A first storage means for storing a first image, a second storage means for storing a second image, and displaying the first image in a predetermined area in a display area, Display means capable of displaying the second image in an area other than the predetermined area in the display area; input means for inputting a scroll direction; and an area for increasing the area of the predetermined area. An image display device, comprising: a moving unit that moves a boundary between a predetermined region and a region other than the predetermined region in a direction corresponding to the input scroll direction. 8. A step of displaying a first image, a step of inputting a scroll direction, a step of acquiring a second image corresponding to the input scroll direction, and the displayed first image A step of displaying a part of the acquired second image on top of the second image in a direction corresponding to the input scroll direction, and displaying the second image displayed on the first image in a superimposed manner. And a step of increasing the overlapping area with the first image by sliding the image display method.