JP3146946B2 - Display control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display control device capable of superimposing a plurality of images on a screen display of a navigation system or a game machine.

[0002]

2. Description of the Related Art FIG. 7 is a schematic block diagram showing an example of a conventional display control device of this kind. In FIG. 7, reference numeral 31 denotes a first memory for storing color address information of first display data to be a foreground surface, 32 denotes a second memory for storing color address information of second display data to be a background surface, and 33 denotes a first memory. A first color pallet 34 for outputting the first display data color signal b1 based on the color address information a1 of the display data from the memory 31, and a first color palette 34 based on the color address information a2 of the second display data from the second memory 32. A second color pallet for outputting a second display data color signal b2; 35, a reference register for storing comparison information in advance; 36, a first display data color address signal a1 from the first memory 31 and a reference register 35; The comparator 37 outputs a selector selection signal c based on the comparison signal e of the first display data based on the selector selection signal c from the comparator 36. A selector 38 for outputting a composite display data color signal d showing the display color signal b1 and showing the second display data color signal b2. A selector 38 displays a screen based on the composite display data color signal d output from the selector 37. A display device that performs color display. 39 is a first memory 31 and a second memory 3
2, the first color palette 33, the second color palette 34, and the reference register 3
5 is a control device that performs write control on the display device 5 and display control on the display device 38.

The configuration of the above conventional example will be described in more detail below together with its operation. First, the first display data color address information is stored in the first memory 31 in advance by the write control signal from the control device 39, the second display data color address information is stored in the second memory 32, and the write control signal from the control device 39 is used in advance. The first display data color information in the first color palette 33 and the second color information in the second color palette 34.
The display information color information is further written into the reference register 35 according to the write control signal from the control device 39. In this state, the control device 39
First from the first memory 31 by the read control signal from the 1
The display data color address information is transferred from the second memory 32 to the second
The display data color address information is sequentially read out in synchronization with the display control signal to the display device 38 and sent to the first color palette 33 and the second color palette 34, respectively.

A first color palette 33 and a second color palette 34 are provided with first and second display data color address signals a corresponding to the first and second display data color address information.
1 and a2 from the first memory 31 and the second memory 32, and the first and second display data color signals b1, b corresponding to the first and second display data color address information.
2 and each is sent to the selector 37. On the other hand, the comparator 36 compares the first display data color address signal a1 read from the first memory 31 with the comparison signal e from the reference register 35, and uses the comparator output signal as the comparison result as the selector selection signal c. Enter 37.

When the first display data color address signal a1 read from the first memory 31 matches the comparison signal e from the reference register 35, the selector 37 outputs the second color data from the second color palette 34. The display data color signal b2 is selected and sent to the display device 38. At this time, the first display data color address signal a from the first memory 31
1 is a transparent color for projecting the second display data color signal b2 from the second color palette 34 on the display device 38 so to speak. Conversely, if they do not match, the first display data color signal b from the first color palette 33
1 is transmitted to the display device 38.

Therefore, the first memory 31 is used as the foreground surface.
The first display data color address information of the second memory 32 as a background is combined with the second display data color address information of the background as a background image by writing the first display data color address information of the first register in advance with the comparison information of the reference register 35 as necessary. Can be realized.

[0007]

However, in such a conventional configuration, the comparator 36 is used to obtain the composite display data color signal d as a result of the superposition of the foreground and background planes sent to the display device 38. The selector 37 selects one of the two display data color signals b1 and b2 from the comparison result between the first display data color address signal a1 read from the first memory 31 and the comparison signal e from the reference register 35 in FIG. In order to select the second display data color signal b2 from the second color pallet 34, the first display data color address signal a1 of the first memory 31 as a transparent color, Reference register 3 which is one of the color addresses
5 is limited to one of the comparison signals e, and the transparent color as the foreground surface that reflects the background surface is 1 at the same time on one screen.
There was a problem that only color could be taken.

Further, as shown in FIG. 8 (a), traffic congestion road information is arranged on the foreground plane α, and as shown in FIG. 8 (b), map information is arranged on the background plane β. ), When a synthetic screen γ, which is a result of the superposition of the foreground plane α and the background plane β, is displayed as traffic information on the display device 38, a transparent color is arranged on the foreground plane α to display the background plane β. In this case, the background surface β of the non-transparent color of the foreground surface α is hidden under the uniform foreground surface α and is not projected. To
There was a problem of hiding .

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems. In superimposition of a plurality of screens, a plurality of transparent colors of a foreground surface for projecting a background surface can be simultaneously obtained.
In addition to the above object, the present invention also provides a display control device capable of displaying only necessary information preferentially for each color address of the background surface, even on the background surface of a portion where the foreground surface is not transparent. In addition to the object, an object of the present invention is to provide a display control device capable of speeding up the rewriting of the designation of the transparent color or the priority color.

[0010]

According to the present invention, in order to achieve the above object, a plurality of plane memories for storing display data color address information and display data color address information read from each of the plane memories are inputted. A plurality of selector selection information memories respectively outputting selector selection information corresponding to the display data color address information; and a plurality of display data color address information from each of the plane memories, and selector selection information from the selector selection information memory. selector and synthetic display corresponding to the combined display data color address information as input composite display data color address information from the selector for selectively outputting the synthesized display data color address information as a superposition of a plurality of screens on the basis of
Corresponding to a color palette for outputting color information for data, a display device for displaying based on the color information for composite display data, an operation of writing and reading display data color address information to and from the plane memory, and a selector selection information memory write operation of the selector selection information, the write operation of the composite display data for color information for the color palette, and a control device for controlling a display operation for the display device, the selector selects information menu
Memory displays selector selection information for each display data color address information
It is characterized by having .

In the above-mentioned configuration, the selector selection information contained in the selector selection information memory is used not only as a transparent color as a foreground surface for projecting the background surface but also as a priority color as a background surface for projecting the background surface. Can be.

Further, the selector selection information contained in the selector selection information memory can be written at once by the control device.

[0013]

According to the present invention, in order to obtain color information for composite display data as a result of superimposition of a plurality of screens to be sent to a display device, the selector selection information memory has selector selection information. Since one of a plurality of display data color address information is selected by a selector based on the information, the color information for the display data is converted to the composite display data color information using a color palette provided for a plurality of planes. In superimposition of a plurality of screens, a plurality of transparent colors on the foreground plane that reflects the background plane can be simultaneously taken on one screen.

Further, by utilizing the selector selection information as a priority color as a background surface for projecting the background surface, even if the foreground surface is not transparent, only necessary information can be stored for each color address of the background surface. Priority.

Further, by writing the selector selection information stored in the selector selection information memory all at once by the control device, the rewriting of the designation of the transparent color and the priority color can be speeded up.

[0016]

【Example】

Embodiment 1 Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. 1 to 5 show a display control apparatus according to a first embodiment of the present invention. FIG. 1 is a schematic block diagram, FIG. 2 is a schematic diagram for explaining the contents of first and second selector selection information memories, and FIG. Is a schematic diagram for explaining the contents of the first and second color palettes, and FIGS. 4 and 5 are conceptual diagrams showing how the foreground surface and the background surface are superimposed.

In FIG. 1, reference numeral 1 denotes a first plane memory storing first display data color address information as a foreground surface; 2 a second plane memory storing second display data color address information as a background surface; Is the first display data color address signal a1 read from the first plane memory 1.
The first selector selection information memory 4 outputs a first selector selection signal b1 corresponding to the first display data color address signal a1 as an input, and the second display data color address signal a2 read from the second plane memory 2 is input to the first selector selection information memory 4. The second selector selection information memory 5 that outputs the second selector selection signal b1 corresponding to the second display data color address signal a2 as the first and second display data colors from the first and second plane memories 1 and 2 The first and second selector selection information memories 3, 4 receive address signals a1, a2 as inputs.
And second selector selection signals b1 and b2
A selector 6 for outputting a composite display data color address signal c as a superposition based on the composite display data color address signal c from the selector 5 and a composite display data color corresponding to the composite display data color address signal c A color pallet which outputs the signal d and has color signal information for composite display data corresponding to the first and second display data color addresses, and 7 performs display based on the color signal d for composite display data from the color pallet 6. A display device. 8
Is a control device, which stores first and second display data color address information for the first and second plane memories 1 and 2 .
Information writing and reading operations, an operation of writing selector selection signal information 9 to the first and second selector selection information memories 3 and 4, an operation of writing display data color signal information to the color palette 5, and a display device 7.
, Respectively, to generate control signals required for a display operation.

In FIG. 2, reference numeral 9 denotes selector selection signal information, which is set corresponding to each color address. In FIG. 3, reference numeral 10 denotes display data color signal information, which is set corresponding to each color address. 4 and 5, α is a display data color address signal a1 in FIG. 1 as a foreground surface, and β is a display data color address signal b1, γ in FIG. 1 as a background surface.
1 shows a composite screen as a result of superposition of the foreground plane α and the background plane β, and shows each state of one screen of the composite display data color signal d in FIG.

The configuration of the above embodiment will be described in further detail below together with its operation. First, the first display data color address information is written to the first plane memory 1 and the second display data color address information is written to the second plane memory 2 by a write control signal from the control device 8. The display data color address information is, for example, 4-bit “000”.
0 "," 1111 ", etc. In addition, according to the write control signal from the control device 8, the selector selection signal information 9 is stored in the first and second selector selection information memories 3 and 4, as shown in FIG. The selector selection signal information 9 is, for example, information such as 1-bit data “0” or “1.” Further, the color pallet 6 is written by a write control signal from the control device 8. The display data color signal information 10 is written for the first and second display data color addresses corresponding to the color addresses as shown in Fig. 3. The display data color signal information 10 is, for example, 15-bit RGB. It is information such as a digital signal, and the number of simultaneous colors on one screen during display is determined by the number of display data color addresses.

After setting to such a state, the control device 8
The display data color address signals a1 and a2 are sequentially read from the first and second plane memories 1 and 2 in response to a read control signal from the first and second plane memories 1 and 2, respectively, and input to the first and second selector selection information memories 3 and 4 and the selector 5, respectively. The first and second selector selection information memories 3 and 4 output first and second selector selection signals b1 and b2 corresponding to the input display data color address signals a1 and a2, respectively, and input them to the selector 5, respectively. The selector 5 selects one of the first and second display data address signals a1 and a2 based on the first and second selector selection signals b1 and b2, and sets a color palette as the composite display data color address signal c1. Enter 6 The color pallet 6 outputs a synthesized display data color signal d corresponding to the input synthesized display data color address signal c and sends it to the display device 7. A series of operations up to this point is performed in synchronization with a control signal required for a display operation such as a horizontal / vertical synchronization signal from the control device 8 to the display device 7.

Information as to whether or not to select the first display data color address signal a1 as the foreground surface is written in the first selector selection signal b1. When information indicating that selection is not to be performed is written, the second display data color address signal a2 is output to the composite display data color address signal c output from the selector 5, and when information to select is written. , The first display data color address signal a1 is output. Therefore, when information indicating that the first display data color address signal a1 is not to be selected is written in advance in the first selector selection signal b1, the first selector selection signal b1 is originally used to display the first display data from the first plane memory 1. Since it is determined by the data color address signal a1, the first display data color address signal a1 from the first plane memory 1 as the foreground surface is converted to the second display data color address signal a2 as the background surface by the color palette 6. It can be converted and function as a transparent color to be displayed on the display device 6 as the composite display data color signal d. Since the first selector selection signal b1 is set for the first display data color address, a plurality of transparent colors up to the number of the first display data color addresses are simultaneously displayed on one screen in the first display data color address. The address signal a1 can be provided.

Thus, for example, the vehicle position mark is arranged on the foreground plane α as shown in FIG. 4A, and the map information is arranged on the background plane β as shown in FIG. (C) is displayed in a superimposed manner as the composite screen γ, and when the own vehicle position mark on the foreground surface α blinks, the first display data color address of the first plane memory 1 is controlled by the write control signal of the control device 8. This can be realized by simply rewriting the selector selection signal information 9 set to the color address of the foreground surface α used in the own vehicle position mark without rewriting the content of the information.

Information as to whether or not to preferentially select the second display data color address signal a2 as the background surface regardless of whether the foreground surface is transparent or not is written in the second selector selection signal b2. Have been. When information indicating that selection is not to be preferentially performed is written, the combined display data color address signal c output from the selector 5 includes the display data color address signal a1 corresponding to the first selector selection signal b1.
Or a2 is output. If the information of preferential selection is written, the second display data color address signal a2 is output. Therefore, when information indicating that the second display data color address signal a2 is preferentially selected is written in advance in the second selector selection signal b2,
Since the second selector selection signal b2 is originally determined by the second display data color address signal a2 from the second plane memory 2, the second display data color address signal a2 from the second display plane memory 2 as the background surface. To
The second display data color address signal a2 as the background surface can be converted by the color pallet 5 and function as a priority color for displaying on the display device 6 as the composite display data color signal d.

Thus, for example, as shown in FIG. 5 (a), traffic congestion road information is arranged on the foreground plane α, and as shown in FIG. 5 (b), map information is arranged on the background plane β. As shown in FIG. 5 (c), when traffic information which is a composite screen γ as a result of superimposition of the foreground plane α and the background plane β is projected on the display device 7, characters in the map information as the background plane β are displayed. Only by rewriting the selector selection signal information 9 set in the used color address to the priority color, it is possible to prevent the necessary character information from being hidden. Since the second selector selection signal b2 is set for the second display data color address, a plurality of priority colors up to the number of the second display data color addresses are simultaneously displayed on one screen in the second display data color address. The color address signal a2 can be provided.

In a time region where the display device 7 does not display, a necessary portion of the selector selection signal information 9 set for the color addresses of the first and second selector selection information memories 3 and 4 is written by the control device 8. By rewriting all at once by the control signal, it is possible to freely change the number and combination of a plurality of transparent colors and priority colors, and to speed up the rewriting of the transparent color and priority color designation.

As described above, according to the display control apparatus of the present embodiment, the first selector for the foreground plane is used to obtain the composite display data color signal d as a result of superposition of a plurality of screens sent to the display apparatus 8. The first selector control signal information b1 indicating whether or not the foreground surface is to be transparent is stored in the selection information memory 3.
A second selector selecting information memory 4 for the background plane, the second selector control signal b2 of whether the background surface and the priority color, table
And the selector 5 selects one of the two display data color address signals a1 and a2 based on the first and second selector control signals b1 and b2. An address signal c is obtained, and converted and output as a color signal d for composite display data by the color palette 5. Thereby, in the superposition of two screens, a plurality of transparent colors of the foreground plane and the priority color of the background plane, which project the background plane, are simultaneously taken on one screen, and the number and combination of the plurality of transparent colors and the priority colors are freely changed. This
Can be. Further, selector selection signal information 9 for the color addresses in the first selector selection information memory 3 for the foreground surface and the second selector selection information memory 4 for the background surface.
Can be rewritten all at once by the write control signal of the control device 8, thereby making it possible to speed up the rewriting of the transparent color or the priority color designation.

In this embodiment, the two screens are superposed by disposing a transparent color on the foreground surface and a priority color on the background surface. In particular, it is necessary to arrange both the transparent color and the priority color. If there is no, only one of them may be arranged to realize the superposition of the two screens. In this case, unnecessary selector selection signal information 9 in the first selector selection information memory 3 or the second selector selection information memory 4 is stored.
The memory to be used can be omitted, and a display control device without waste can be provided. Further, in the present embodiment, the second selector selection signal b2 for selecting the second display data color address signal a2 as the background surface by the selector 5 when the background surface has the priority color is output from the second selector selection information memory 4. Of the selector selection signal information 9, the second from the second plane memory
A second display data color address signal a2 from the second memory 32 in FIG. 7 showing an example of this type of conventional display control device, which is obtained by addressing with the display data color address signal a2, is newly added. A comparison signal (not shown) from the same reference register as the provided reference register 35 is
It may be obtained by comparing with a comparator (not shown) similar to the newly provided comparator 36. In this case, a plurality of priority colors cannot be simultaneously set on the background surface on one screen. However, the addition of the reference register and the comparator is only partially corrected by the selector 37, and the conventional display control device of this type is added. It is also possible to realize the development from the superposition in which only the transparent color is disposed on the foreground surface to the superposition in which the priority color is also disposed on the background surface. Embodiment 2 Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. FIG. 6 is a schematic block diagram showing a display control device according to the second embodiment of the present invention.

The display control device shown in the first embodiment has two superimpositions of display data. In this embodiment, the number of superimposed display data is m (m is an integer of 2 or more). .

In FIG. 6, reference numerals 11 to 14 denote an n-th plane memory for outputting n-th display data color address signals a1 to am, and reference numerals 15 to 18 denote n-th display data color address signals read from the n-th plane memories 11 to 14. an n-th selector selection information memory for inputting a1 to am and outputting n-th selector selection signals b1 to bm corresponding to the n-th display data color address signals a1 to am; 19 is the n-th selector memory from the n-th plane memories 11 to 14 Display data color address signals a1 to
am, and selects any one of the m display data color address signals a1 to am based on the nth selector selection signals b1 to bm from the nth selector selection information 15 to 18 to display A selector for outputting a composite display data color address signal c as a result of superimposition of m pieces of data; 20 is a composite display data color signal d corresponding to the composite display data color address signal c with the composite display data color address signal c as input; Is a color pallet having m display data color addresses for composite display data, and 21 is a display device for performing display based on the composite display data color signal d. Reference numeral 22 denotes a control device, which is a control signal necessary for writing and reading the n-th display data color address information to and from the n-th plane memories 11 to 14, a control signal necessary for the display operation for the display device 21, and n-th selector selection information A control signal necessary for writing the n-th selector selection signal information to the memories 15 to 18 and a control signal necessary for writing the display data color signal information to the color pallet 20 are generated.

The configuration of the above embodiment will be described in further detail below together with its operation. In the present embodiment, the first
In the superimposition of the display data of the embodiment, the first is replaced with the (n-1) th and the second is replaced with the nth. Accordingly
In this case, the same effect as that of the display control device in which the display data is overlapped with the two display data is obtained. That is, for each of the plurality of display data, a plurality of transparent colors and priority colors up to the number of color addresses of the n-th display data color address signals a1 to am are simultaneously displayed on the n-th display data.
N-th display data color address signals a1 to am from the memory
It is possible to have. Further, in the time region where the display device 21 is not displayed, a necessary portion of the selector selection signal information 9 set for each color address of the n-th selector selection information memories 15 to 18 is collected at once by the write control signal of the control device 22. By rewriting, the number and combination of a plurality of transparent colors and priority colors can be freely changed, and the rewriting of the transparent color and priority color designation can be speeded up .

Even if the display control device is configured to superimpose display data for m pieces, it is not always necessary to always superimpose the display data to m pieces. It is also possible to use the display data as a superposition of less than m display data, thereby realizing a display control device having flexibility and versatility.

In this embodiment, m plane memories are used in order to configure a display control device for superimposing m display data, but m or less plane memories are used by a memory having a plurality of ports. It can be a memory. In this case, since the number of components of the entire display control device can be reduced, cost reduction, size reduction, improvement in reliability, and the like can be obtained. Further, in the present embodiment, the superimposition of a plurality of screens is realized by arranging a transparent color and a priority color for each of a plurality of display data, but it is not particularly necessary to arrange both the transparent color and the priority color. In this case, at least one of the plurality of display data may be arranged to realize the superposition of a plurality of screens. In this case, a circuit storing unnecessary selector selection signal information 9 out of the n-th selector selection information memories 15 to 18 can be omitted, and a display control device without waste can be provided.

[0033]

As described above, according to the present invention,
To obtain color information for composite display data as a result of superposition of a plurality of screens to be sent to the display device, selector selection signal information indicating whether or not the foreground surface is to be transparent is stored in a selector selection information memory corresponding to the foreground surface. The selector selection information memory corresponding to the background plane is provided with selector selection signal information for each of the color addresses for determining whether or not the background plane is to be the priority color, and the selector selects a plurality of display data color addresses based on the selector selection signal information. Since information is superimposed by selecting information, in the superimposition of multiple screens, the transparent color of the foreground surface and the priority color of the background surface that project the background surface must be simultaneously selected on one screen, and the number of multiple transparent colors and priority colors And combinations can be changed freely.

Further, by utilizing the selector selection signal information contained in the selector selection information memory not only as a transparent color as a foreground surface for projecting the background surface but also as a priority color as a background surface for projecting the background surface, Even on the background surface where the surface is not transparent, only necessary information can be preferentially projected for each color address of the background surface.

Further, by writing the selector selection signal information portion provided for the color address in the selector selection information memory collectively by the control device, the rewriting of the designation of the transparent color and the priority color can be speeded up.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram illustrating a display control device according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram for explaining the contents of a selector selection information memory used in the display control device.

FIG. 3 is a schematic diagram for explaining the contents of a color palette used in the display control device.

FIGS. 4A, 4B, and 4C are diagrams showing a foreground surface, a background surface, and a composite screen as a result of superposition for explaining the operation of the display control device; FIGS.

FIGS. 5A, 5B, and 5C are views showing a foreground surface, a background surface, and a composite screen as a superimposition result for explaining the operation of the display control device; FIGS.

FIG. 6 is a schematic block diagram showing a display control device according to a second embodiment of the present invention.

FIG. 7 is a schematic block diagram showing a display control device in a conventional example.

FIGS. 8A, 8B, and 8C are views showing a foreground surface, a background surface, and a composite screen as a superimposition result for explaining the operation of the display control device; FIGS.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st plane memory 2 2nd plane memory 3 1st selector selection information memory 4 2nd selector selection information memory 5 selector 6 color pallet 7 display device 8 control device 9 selector selection signal information 10 display signal color signal information 11 1st Plane memory 12 Second plane memory 13 m-1 plane memory 14 m plane memory 15 1st selector selection information memory 16 2nd selector selection information memory 17 m-1 selector selection information memory 18 mth selector selection information memory 19 Selector 20 color palette 21 display device 22 control device a display data color address signal b selector selection signal c composite display data color address signal d composite display data color signal α foreground plane β background plane γ composite screen

Continuation of front page (58) Fields investigated (Int.Cl. ⁷ , DB name) G09G 5/377 G09G 5/00 G09G 5/06 G09G 5/36 G08G 1/0962

Claims (3)

(57) [Claims] A plurality of plane memories for storing display data color address information; and a plurality of plane memories each of which receives the display data color address information read from each of the plane memories and outputs selector selection information corresponding to the display data color address information. Selector display information memory and a plurality of display data color address information from each of the plane memories as input, and based on the selector selection information from the selector selection information memory , composite display data color address information as a superposition of a plurality of screens A selector for selecting and outputting the composite display data color information from the selector as input, and a color palette for outputting composite display data color information corresponding to the composite display data color address information. Display device for displaying images based on Control for controlling the operation of writing and reading display data color address information to and from the memory, the operation of writing selector selection information to the selector selection information memory, the operation of writing composite display data color information to the color palette, and the display operation to the display device Device, and the selector selection information menu
Memory displays selector selection information for each display data color address information
Display control device characterized by having the. 2. The method according to claim 1, wherein the selector selection information contained in the selector selection information memory is used not only as a transparent color as a foreground surface for projecting the background surface but also as a priority color as a background surface for projecting the background surface. The display control device according to claim 1. 3. A method according to claim 1, wherein the plurality of selector selection information memories include a plurality of selection selection information memories.
2. The display control apparatus according to claim 1, wherein the selector selects information for superimposing screens at a time by the control apparatus.