JPS60208797A - Color image display unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides a display screen that is divided into a plurality of areas and displays a large image, and a color table specific to each area is created by a general company and this color table is divided into a plurality of areas. - This relates to a color image display device that displays images on a display screen via a table.

[Prior art]

Conventionally, in this type of color image display device, as shown in FIG.
), a color table for setting colors that can be displayed simultaneously is provided for each area (1) to (4), and each area (11 to (4) has a different display color setting, A method is adopted in which the images are simultaneously displayed on the display screen 2.In addition, in FIG.

XN indicates the resolution on the display surface 2.

FIG. 2 is a block diagram showing the color image display device of FIG. 1. In the figure, 2 is the display surface, 3 is the display surface 2
4 is a display memory for each area of the display screen 2, and 5 is a CRT controller.

In the conventional color image display device shown in FIG.
The image information of each divided area is written in the display memory 3 of each area. This written image information is C
It is read out according to the address of the rask scan generated by the RT controller 5 and supplied to each color table 4. The table 4 displays a color image by outputting it to the set cover display surface 2 according to the supplied image information.

Since the conventional color image display device is configured as described above, when the size and position of each area on the display surface 2 are fully variable, the display memory 3 for each area can store the area that can be specified. The maximum size must be prepared, and furthermore, the control of the CRT controller 5, which gives read addresses to each display memory 3 according to the designated area, becomes complicated.

[Summary of the invention]

This invention was made with the purpose of improving the above-mentioned drawbacks of the conventional ones. Image information of each area of the display surface is written in a display memory corresponding to the display surface, and the written image information is By reading out the color table according to the read address, and selecting and switching the color table corresponding to each area of the display surface based on the read address, the display memory can be reduced by a few notes, and it is easy to use. The present invention provides a color image display device that is capable of color displaying images with different color settings for each region of a display surface through control.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 3 is a block diagram showing a color image display device according to a first embodiment of the present invention. The same parts as in FIG. 2 are designated by the same reference numerals, and detailed explanation thereof will be omitted. In the figure, 6 is a central processing unit, 7 is a display memory,
8 is a register, 9 is a comparator, and 10 is a switch.

The first embodiment of the invention shown in FIG. 3 has four areas as shown in FIG.
For the address (x, y) of the rask scan, there are four straight lines: X'', Xo, X=X+, Y=Yo and Y=
This is realized for regions (1) to (4) where Y,'i are the boundary values. 1 display memory 7 as shown in Figure 3.
The central processing unit 6 directly or under the control of the central processing unit 6 connects other external devices (disks installed).

(video camera, etc.), image information is written into the designated area. The image information written in the display memory 7 is sequentially read out according to the read address generated by the CRT controller 5, and the image information is read out in sequence according to the read address generated by the CRT controller 5. A display color is provided to the display surface 2. In order to switch the color table 4 according to the above read address,
The central processing unit 6 calculates X, which is the boundary value of each area of the display surface 2.
o, X+-Yo and Y,'t- are written to register 8, respectively. The contents of each register 8 are supplied to each corresponding comparator 9. Also, the boundary values Xn and X1
? The X address of the read address is supplied to each comparator 9 as input, and the Y address of the read address is supplied to each comparator 9 as input of the boundary values Yn and Yst. If the contents of the pointed register 8 and the read address match, "1" is output, and if they do not match, "0" is output. The respective outputs of each comparator 9 are supplied to a switch 10, and based on this information and the information of the currently selected color table 4, the color table 4 is changed according to the address of the image currently being read out. is determined, and each color table 4 is sent with a control signal OE (the selected color table is "0").
"1 Color table that is not selected is rIJ) t-
and select a predetermined color table 4.

FIG. 5 is a block diagram showing details of the switch in the color image display device of FIG. 3.

In the figure, 9 is a comparator, 10 is a switch, 11 is a deducer, 17 is an area detector, and 18 is a launcher. Fifth
In the switch 101C shown in the figure, the area detector 17 receives the boundary value X as explained in FIG. (That is, if the current read address is on the boundary line in the Y direction, OR, = 1.

Otherwise, OR,=O), boundary values Y0 and Y,
The ORed signal 0R of the output of each comparator 9 corresponding to
1 (that is, if the current read address is on the boundary line in the X direction [0Rt=1; otherwise, 0Rt
=O), and each signal o output from the latch 18, which will be described later.
',,o°! are supplied respectively. Each signal O1,0
° is a signal indicating to which area the previous read address belongs. The area detector 17 detects each signal 0, . . . as shown in FIG. ,01 is output. Each signal 0+, Ot is a signal indicating the area to which the current read address belongs.
, Ot ) = (0, 0), then the area fil is set to the signal (0+
, Ot )=(0,1), then region (2) is set to signal (0
+, 0! )=(1,0), then the area (31) is replaced by the signal (
0, , Ot ) = (1, 1), respectively indicate the area (4). Each signal OI.

0 and 18 are supplied to the latch 18, and respective signals 0'+ and O'* output from the latch 18 are supplied to the area detector 17 and the decoder 1lvc. As mentioned above, this latch 18 functions as a delay circuit for supplying the signals 0+ and O't indicating the area to which the previous read completed address belongs to the area detector 17, and detects the new read address. Each signal corresponding to 0. ．． 0. Holds the current value until output. As shown in FIG. 15, the decoder 11 outputs a signal OE? which selects the color table 4 corresponding to the area to which the existing read address belongs from each signal 0'+rO''x. The area detector 17 is
It can be configured with memories such as ROM and RAM, gate circuits, etc.; however, if the color table 4 corresponding to each area of the display surface 2 is fixed, it can be configured with non-rewritable ROM and gate circuits, and the In addition, if the color table 4 is variable for each area of the display surface 2, for example, color table 4-1 corresponds to area (1), and color table 4-2 corresponds to area (2). , color table 4-1 and area 12), color table 4-2 and area (1), or each area (1) and (2) corresponds to color table 4-1. In the case of changing the memory contents as shown in FIG.

As is clear from the description of the first embodiment above, the color image display device according to the present invention uses a single display memory 7, so the number of display memories is reduced and the CRT controller 5 By selecting the color table 4 corresponding to each area of the display surface 2 with a simple circuit configuration and without increasing the complexity of control, it is possible to display images with different color settings for each area of the display surface 2. (It becomes possible to perform color display.Also, even if the number of areas into which the display surface 2 is divided increases (therefore, the number of color tables 4 also increases), the number of registers 8.

The number of comparators 9 and the number of inputs of the switch 10 only increase proportionally, and it can be easily realized without requiring a complicated circuit configuration.

FIG. 7 is a block diagram showing a color image display device according to a second embodiment of the present invention. The second embodiment shown in FIG. 7 is implemented for four areas (11 to (4)) of equal size, as shown in FIGS. 8(a) and 8(b). Here, each boundary value X. and the top 1 of XI
Values other than pit and each boundary value Y. The values of Yl and Yl are the same, and the areas 121 to (4) other than area (1) of the display surface 2 shown in FIG. , which are further divided into smaller areas positionally, but these sub-divided areas are collectively considered to be one divided area. The difference between this second embodiment and the first embodiment is that the resolution of the display surface 2 is rMXN=2”X2
n, each register 8 shown in FIG. 7 has a value of the lower (n-1) pinto of the boundary value , the lower (m-1) focus value of the boundary value Y0 [that is, equal to the value of the lower (m-1) bits of the boundary value Y1] is written by the central processing unit 6, and each comparator 9 is , the output of each register 8, the lower (n-1) bits of the X address of the read address, and the lower (m-1) bits of the Y address of the read address are supplied. The switch 10 is
Similarly to the first embodiment, whether or not the area of the display surface 2 has changed is determined by using the output of the comparator 9 and the control signal OE &
Color table 4 corresponding to each area determined from C
Select. Generally, the display surface 2 is 2 m' of equal size.
When dividing into X2n1 areas, the values used as boundary values may be the lower (nn,') bits of the X address and the lower (mm,) bits of the Y address. As is clear from the comparison with the first embodiment, this second embodiment has a restriction that the size of the 2m1×2n1 areas is equal in the second embodiment; -m
, ) bit register 8 and comparator 9, and (n-n,)
This can be realized by one set each of a bit register 8 and a comparator 9. In addition, in the first and second embodiments, if the comparator 9 that can compare the magnitude is used, the configuration of the switch 10 will be even easier.

FIG. 9 is a block diagram showing a color image display device according to a third embodiment of the present invention. In the figure, 12 is RAMX, 13 is a color table address converter,
14 is a color table. In the third embodiment shown in FIG. 9, as in the first embodiment, FIG.
, (b) is realized for arbitrary regions (1) to (4). This third embodiment is similar to the first embodiment described above.
This embodiment differs from the embodiment in the configuration of the color table and the part for switching the color table. The read address generated by the CRT controller 5 shown in FIG.
AM12 is given an X address and an X address respectively.

Resolution [M X Niz 2m-'<M< 2m,
2"-"<N≦2n, the RAM 12 corresponding to the X address is a 211 x 1 bit RAM,
RAM12 corresponding to the X address is 2m x 1 pinto R
It is AM.

■The address of AM12 is the X address of the screen and
There is a 1:1 correspondence with the addresses, and in the RAM 12, "1" is stored at the X address and the position of the X address, which is the boundary value of the area of the display surface 2, and "0" is stored at the other address positions.
is written. Fig. 4 ta+, (blK.

In the example of dividing the area of the display surface 2 shown in FIG.
" is written as 1, "0" is written in the other locations, and the address Yo is written in the RAM 12 corresponding to the X address.
"1" is written in the positions of and Y, and "0" is written in the other positions. That is, the RAM 12 has functions similar to those of the register 8 and comparator 9 in the first embodiment, and when reaching the boundary between the areas in the X direction and the Y direction,
The signal “1” is fully supplied to the switch 10. Switcher 1
0 is the signal R, (X
output of RAM 12 with address as input) and signal R,
Based on (the output of the RAM 12 which takes all the X addresses as input), it determines the area where the heave is currently being laid out and outputs the heave of that area. For example, in the division example shown in FIG. 4fa) and (b), area (1) is [OOJ, area 12+
outputs a signal of [OIJ, region (3) outputs [lOJ], and region (4) outputs a signal of "11". The color table address converter 13 inputs the output of the switch 0 and all the contents (color table entry address) read from the display memory 7, and converts the address corresponding to the configuration of the color table 14. generate. For example, as shown in Figure 10, color table entry address 2
When the color tables of four areas each having bits are configured consecutively, the color table address converter 13 converts the upper two bits into the address of the color table of each area, as shown in FIG. (Cut changer 10
to the color table address indicating the output of
A 44-bit address is synthesized, the lower two bits of which are the color table entry address. By applying this address to the color table 14, the color square of the area currently being read out is selected, and each area is displayed on the display surface 2 through this.

FIG. 12 shows the cutoff υ in the color image display device of FIG.
FIG. 2 is a block configuration diagram showing details of the converter. In the figure, 15 is a counter and 16 is a differential.

Da, chiru. In the switch 10 shown in FIG.
Signals R1 and R2 output from each RAM 1.2 are input to each counter 15, and when "1" is input, the contents of the counter 15 are incremented. The reset terminal of the counter 15 receives a horizontal synchronizing signal (H8YNC) and a vertical synchronizing signal (VSYNC) from the CRT controller 5, respectively.
is supplied, and when one line scanning is completed, the signal R is output from the RAM 12 corresponding to the X address, and the contents of the counter 15 that is input is cleared. The output signal R and the contents of the input counter 15 are cleared. That is, assuming that the number of area divisions in the X direction is iLx and the number of area divisions in the Y direction is Ly, each counter 15 counts by module Lx h or module Ly.

The decoder 16 is composed of a RAM, etc.
determines each area based on the output of each counter 15,
Outputs the color table address for that region. As is clear from a comparison with the first embodiment, the functions of the register 8 and comparator 90 in the first embodiment are realized by the RAM 12 in the third embodiment, and The size of the RAM 120 is unrelated to the number of area divisions. Furthermore, as shown in FIGS. 12 and 13, the configuration of the switching device 10 in the third embodiment is not affected by the number of area divisions, so the number of area divisions is large and variable. In some cases, it is very effective.

In each of the above embodiments, as shown in FIGS. 4A and 4B, the rectangular areas (1) to (4) on the display surface 2 were described as targets, but for example, as shown in FIG. , even when including the area 121 Th which is an area other than the rectangular areas il+, +31, +41, considering the small rectangular areas (1) to (4) as shown in FIG. 14, the switching device 10
decoder 11 or 16f: rewritable RAM
The central processing unit 6 operates the decoder 11 or 1 according to the relationship between the specified area and the small rectangular area.
This can be easily realized by rewriting the contents of 6 for each small rectangular area.

〔Effect of the invention〕

As explained above, in a color image display device, the present invention determines the area currently being read out according to the readout address of the image information written in the display memo IJK corresponding to the display surface, and Corresponding force 2-
・Because the table is configured to switch, compared to conventional examples of this type, the display memory capacity is reduced by a few notes, and with extremely simple control, images with different color settings can be created for each area of the display surface. This has the excellent effect of being able to display images in color.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a plurality of areas divided on the display surface of the display device in a conventional color image display device, and FIG. 2 is a block configuration diagram showing the color image display device of FIG. 1.
FIG. 3 is a block diagram showing a color image display device according to the first embodiment of the present invention, and FIG. 4(a), fbl
3 is a diagram showing an example of dividing the display surface area realized in the power 2-image display device of FIG. 3, and FIG. 5 is a block diagram showing details of the switching device in the color image display device of FIG. 3. 6 is a diagram showing the input/output relationship of the area detector in the switching device of FIG. 5, and FIG. 7 is a block diagram showing the force 2-image display device according to the second embodiment of the present invention. , FIGS. 8(al) and 8(b) are diagrams each showing an example of dividing the area of the display surface realized by the color image display device of FIG. 7, and FIG. 9 is a third embodiment of the present invention. FIG. 10 is a block configuration diagram showing a color image display device. FIG. 10 is a diagram showing an example of the configuration of a color table in the color image display device of FIG. 9. FIG. FIG. 12 is a diagram showing table addresses, and FIG. 12 is a block diagram showing details of the switch in the color image display device of FIG. 9, and FIGS.
15 is a diagram showing an example of division including areas other than the rectangular area of the display surface, which are modified examples of the present invention, and FIG. 15 is a diagram showing the input/output relationship of the decoder in the switch of FIG. 5. . In the figure, 1... Display device, 2 - Display surface, 3°7
・Display memory, 4.14 ・Color table, 5
-CRT controller, 6 ・Central processing unit, 8...
Register, 9...Comparator, 10 Switch, 11゜16 ・Decoder, 12 ・RAM, 13...Address converter for color table, 15 ・Counter, 17
... Area detector, 18... Lunch. In each figure, the same reference numerals indicate the same or equivalent parts. Agent Masuo Oiwa Fig. 4 (a) (b) Fig. 5 Fig. 6 Fig. 8 ((1) (b) Fig. 9 Fig. 10 Fig. 11 Figure 13 Figure 14 Figure 15 Showa Year Month 1-1: 3. Name of the person making the amendment Title (601) Wangling Electric Co., Ltd. Representative Piece 111 Ren 8 Part 5, ``Invention'' of the specification to be amended "detailed description of the drawing", "brief description of the drawing"
column. 6. Contents of amendment (1) The E method on page 2, lines 9-10 of the specification has been changed to [
The method shown in FIG. 2 is corrected as follows. (2) The word "indicate" in lines 12 and 13 of page 2 of the same book is amended to "indicate the conventional method for realizing it." (3) "Deuda" on page 6, line 13 of the same book is corrected to "decoder." (4) p. 7, line 3 of the same book, r = 0), and "-"
Correct it as “〇）and”. (5) [Module J] on page 15, line 5 of the same book,
[Modulo J color correction. (6) "Conventional" in the first line of page 17 of the same book is deleted. (7) The word "indicates" in the fourth line of page 17 of the same book is corrected to "indicates the conventional method for producing actual images."

Claims (1)

[Claims] When dividing a display surface that displays an image into a plurality of regions and displaying color on the display surface using a color table specific to each region, the X address and the X address that are the boundaries of each region are A register to be stored, a comparator that compares the contents of this register with the read address of the display memory, and a color table corresponding to the area currently being read out based on the output of this comparator. A color image display device comprising a switch.