JP2969271B2 - Screen switching device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [0001] The present invention relates to a screen switching device, and more specifically, to reduce the processing time required for switching a screen (for example, a menu screen) and simplify the configuration. Screen switching device capable of

[Prior Art] An example of this type of conventional screen switching device will be described with reference to FIGS.

FIG. 6 is a main block diagram of an image display system capable of switching a menu screen by a predetermined operation.
The screen switching device 11 includes an image memory rewriting unit 13 and a menu screen image data storage unit 14.

The menu screen image data storage means 14 stores image data of several types of menu screens. Since each of these image data is image data of the entire screen, a considerable memory capacity is required as shown in FIG.

The image memory rewriting means 13 takes out the image data of one menu screen from the menu screen image data storage means 14 and inputs it to the data control means 15.

The data control means 15 converts the input image data into map data, and writes them into the graphic image memory 6a, the reverse image memory 6b, and the character image memory 6c.

Based on the map data written in the image memories 6a, 6b, 6c, the screen synthesizing means 7 displays the one menu screen on a display means 8 such as a liquid crystal display.

Therefore, for example, the menu screen shown in FIG.
M1 is displayed on the display means 8 based on the image data M1G stored in the menu screen image data storage means.

When a menu screen switching command is given from the input unit 2 such as a touch panel, the image memory rewriting unit 13
The image data corresponding to the menu screen to be switched is extracted from the menu screen image data storage means 14 and input to the data control means 15.

The operation from the data control unit 15 to the display unit 8 is the same as described above, and the displayed menu screen is switched.

For example, as shown in FIG. 8B, a menu screen M2 is displayed on the display means 8 based on the image data M2G to be switched.

[Problem to be Solved by the Invention] The conventional screen switching device 11 has two problems.

The first problem is that the processing time is long because the menu screen is switched by rewriting the image data of the entire screen.

The second problem is that an extremely large memory capacity is required because each of the image data of several types of menu screens stored in the screen data storage means 14 is data of the entire screen.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a screen switching apparatus which can reduce the processing time for switching screens and does not require a large memory capacity.

[Means for Solving the Problems] A screen switching apparatus according to the present invention includes a partial screen image data storage unit for storing image data of three or more partial screens, and identification of partial screens constituting each of two or more whole screens. An entire screen edit data storage unit for storing a code and a display area, and rewriting of an image memory for an area corresponding to a partial screen to be switched based on the image data and the edit data when a partial screen switch command is given. And an image memory rewriting means.

[Operation] In the screen switching apparatus of the present invention, the image data of the entire screen is not stored for each of the two or more screens, but in the form of the image data of the partial screen and the edit data for composing the entire screen. Necessary data is stored.

Therefore, for a partial screen common to different screens, the image data of the partial screen need not be redundantly stored, so that the memory capacity can be reduced accordingly. Additional storage space for the edit data is required, but this is only negligible compared to the image data that can be saved.

Further, at the time of switching the screen, the image memory is rewritten only for the partial screen that needs to be changed, so that the processing time can be reduced as compared with the conventional case where the entire rewriting is performed.

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples shown in the drawings. It should be noted that the present invention is not limited by this.

FIG. 1 is a block diagram of an image display system including a screen switching device 1 according to one embodiment of the present invention. Screen switching device 1
Are image memory rewriting means 3 and screen data storage means 4
It is composed of

The screen data storage means 4 stores identification codes and display areas of partial screens constituting each of several types of menu screens in a menu screen editing database MD.
FIG. 2 schematically shows the structure of the menu screen editing database MD, wherein M1, M2,... Are identification codes of the menu screen itself, and C1, C2,. , A1, A2,... Represent the display areas of the respective partial screens.

Further, the screen data storage means 4 stores each image data of three or more partial screens in the partial screen image database CD. FIG. 3 schematically shows the structure of the partial screen image database CD. C1G, C2G,.
The image data of 1, C2,... Is shown.

As a specific example, FIG. 5 shows menu screens M1, M2, partial screens C1, C2, C3, C4, and display areas A1, A2, A3. Note that G
Represents image data.

The image memory rewriting means 3 includes the screen data storage means 4
The identification code and the display area of the partial screen constituting one menu screen are sequentially extracted from the menu screen editing database MD, and the image data of the partial screen corresponding to the identification code is stored in the screen data storage unit 4. Are sequentially extracted from the partial screen image database CD, and the extracted image data and display area are sequentially input to the data control means 5.

The data control means 5 creates partial map data in order based on the input image data and the display area, and writes the partial map data into corresponding areas of the graphic image memory 6a, the reverse image memory 6b, and the character image memory 6c.

The screen synthesizing means 7 displays one menu screen on the display means 8 such as a liquid crystal display based on the map data of the image memories 6a, 6b and 6c, which is the same as the conventional one.

Therefore, if the one menu screen is, for example, M1, the editing data of A1 to C3 in FIG. 2 is taken out, and the image data of C1G to C3G in FIG. 3 are taken out, for example, as shown in FIG. The partial map data of such partial screens C1 to C3 are written in the areas of the image memories 6a, 6b, 6c corresponding to A1 to A3, and the menu screen M1 is eventually displayed on the display means 8.

Now, when a menu screen switching command is given from the input means 2 such as a touch panel, the image memory rewriting means 3
As shown in FIG. 4 (a), it is determined whether the area to be rewritten in the image memories 6a, 6b, 6c is a partial or entire area (S1). This determination can be made, for example, by making a table of the identification code of the current menu screen, the identification code of the next menu screen, and the distinction between partial rewriting and whole rewriting in advance, and referring to the table.

If partial rewriting, partial screen display processing (S2) is performed. That is, as shown in FIG. 4B, the area corresponding to the partial screen to be rewritten is cleared (R1), and new image data is written (R2).

If the whole screen is to be rewritten, the partial screens are sequentially extracted based on the editing data of the menu screen (S3), the partial screen is displayed (S4), and this is repeated (S5).

As described above, the data control means 5 creates partial map data based on the input image data and display area, and writes the partial map data into the corresponding portions of the image memories 6a, 6b, and 6c. Since only this write processing is performed for the, the processing time is greatly reduced.

The screen synthesizing means 7 displays one menu screen on the display means 8 based on the map data of the image memories 6a, 6b, 6c in the same manner as described above.

Therefore, if the currently displayed menu screen is, for example, M1, and the next menu screen to be displayed is, for example, M2, only the partial screen C4 is different as can be seen from FIG. Of the partial screen data of the partial screen C4 as shown in FIG. 5, for example.
It is written to the area of the image memory 6a, 6b, 6c corresponding to A3,
Eventually, the display is switched to the menu screen M2.

As another embodiment, when a screen switching command is given,
Compare the identification code and display area of the partial screen that constitutes the currently displayed menu screen with the identification code and display area of the partial screen that constitutes the menu screen to be displayed next. A partial screen, that is, a partial screen in which at least one of the identification code and the display area is different is extracted, and image data corresponding only to the partial screen is extracted from the partial screen database CD of the screen data storage unit 4, and the image data and the display area are extracted. One example is input to the data control means 5 in order.

[Effect of the Invention] According to the screen switching apparatus of the present invention, since the image data of the portion common to different screens does not need to be stored redundantly, the memory capacity can be reduced accordingly. Further, when switching the screen, the image memory is rewritten only for the portion that needs to be changed, so that the processing time can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram of an image display system including a screen switching device according to an embodiment of the present invention. FIG. 2 is a schematic diagram of a menu screen editing data of the screen switching device shown in FIG.
FIGS. 4A and 4B are schematic diagrams of the configuration of partial screen image data of the screen switching device shown in FIG. 1, FIGS. 4A and 4B are flowcharts of screen switching processing of the screen switching device shown in FIG. 1
FIG. 6 is a diagram for explaining the principle of screen switching of the image switching apparatus shown in FIG. 6, FIG. 6 is a block diagram of an image display system including an example of a conventional screen switching apparatus, and FIG. 7 is a menu screen image of the screen switching apparatus shown in FIG. FIG. 8 is a schematic diagram showing the structure of data, and FIG. 8 is a view for explaining the principle of screen switching by the screen switching device shown in FIG. (Explanation of reference numerals) 1 Screen switching device 3 Image memory rewriting means 4 Screen data storage means 5 Data control means M1, M2 Menu screen A1 to A3 Display areas C1 to C4 Partial screen identification code C1G to C4G …… Image data of the partial screen.

Claims (1)

(57) [Claims] 1. An input means capable of inputting a command for switching between a plurality of screens; a first storage means for storing image data corresponding to a plurality of partial screens constituting each of the screens; An identification code for identifying each of the plurality of partial screens,
A second storage unit for storing a display area code indicating an area where the partial screen identified by the identification code is located; and a screen currently displayed, which is switched by a switching command input via the input unit. When there is a partial screen in which at least one of the identification code and the display area code is different from the screen, the partial screen changed by the identification code and / or the display area code stored in the second storage means And a switching unit that reads out image data corresponding to the partial screen to be changed from the first storage unit and switches the screen.