JP2888522B2 - Display control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a flat display and a CRT display.
A display controller for optionally controlling the display drive
You. (Prior art) Conventionally, CRT display function
Display timing signal to be set to the controller (CRTC)
To switch the display mode of the CRT display.
Select the display resolution (display dot mat
Rix configuration) to control the CRT display.
Was. However, instead of CRT displays, plasma displays
When trying to drive the display with CRTC,
The plasma display mechanism is a physical dot matrix
Because the configuration is fixed, the above CRT display
The display mode cannot be switched as described above. So, in the plasma display, the BIOS call
The display mode by changing the display timing to CRTC
It is conceivable that switching can be performed.
Screen according to the display mode of the plasma display
The aspect ratio of the CRT display is different from the aspect ratio of the display screen.
The actual image on the display screen is displaced (distorted).
There is a problem that accurate display correspondence cannot be taken.
At this time, the CRT display and the plasma display
It is difficult to obtain the optimal display font between each other
The problem had arisen. (Problems to be Solved by the Invention) As described above, conventionally, a flat display mechanism is used.
When the display mode can be switched in
The flat display differs from the aspect ratio of the display screen of the display.
When the play display mode is set, the display screen
Displacement (distortion) occurs in the image and accurate display correspondence
At the same time.
Optimal display between ray and flat display
The problem of having difficulty getting fonts
Was. The present invention has been made in view of the above circumstances, and has a flat
Display and CRT display drive
Display and output the optimal font for each
High visibility and clear clarity when driving the spray display
The aim is to provide a display control device capable of displaying characters.
Target. [Structure of the Invention] (Means and Actions for Solving the Problems) The present invention relates to a method for displaying on a flat display and a CRT display.
Visual recognition of characters both when displayed on the display
Flat display to enhance
Display control of the display and CRT display selectively
A display control device that is a display drive target display.
A means for selecting play and a display for the selected display.
Means for storing designated information, and the flat display
The first font specific to the CRT display and the
Means for separately storing the second fonts;
When the rat display is the display drive target,
One font is used and the above CRT display is displayed.
The 2nd font above will be used for live
And the first and second fonts according to the designation information.
Is selectively read out and displayed.
Depending on each display of flat display / CRT display
Display the best font for each display when driving
It can be viewed when driving the display of each of the above displays.
Character display with high recognizability and clearness becomes possible. (Embodiment) An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of the present invention. In the figure, reference numeral 10 denotes a CPU that controls the entire system.
Here, display control as shown in FIGS. 2 and 3 is executed.
You. 11 is the ROM accessed by the CPU 10 and 12 is the same
The main memo of the RAM configuration accessed by the CPU 10
(MM). The ROM 11 contains a CRT / BIOS, keyboard
RO that stores various fixed programs including BIOS
An M area and a predetermined dot matrix configuration (here, 8 ×
8 dots, 8 × 14 dots, 8 × 16 dots)
Font storage area where font pattern data is stored
With. The main memory 12 has a predetermined register area.
In the display mode by CRT display (CRT mode
Or plasma display (PDP)
CRT indicating display mode (hereinafter referred to as PDP mode)
Flag (FC) 13a, display characters in text mode
The font is a single font with the reference line width (1 dot width; thin line)
Double or wider line width (thick)
Double flag (FD) 13b, text indicating whether
Group that indicates whether the mode is graphics or graphics
Traffic flag (FG) 13c in graphic mode
Whether the display character font in the stretch mode
Stretch flag (FS) 14a, which indicates
A stress that indicates enable / disable (enable / disable)
A switch enable flag (FE) 14b is provided. 15 is a keyboard (KB), which is a keyboard control
Enter the data according to the operation keys under the control of LA (KBC) 16
Here, the display in the text mode
Character font (single font / double font)
Double / single switching key for switching, CDP mode to PDP
PDP switch key to switch to mode, PDP mode
Switch key and graph to instruct switch to CRT mode
Plasma display (PDP) 1 in pix mode
7 display modes (stretch mode / normal mode)
And a stretch switching key for switching between the two. 17 has a CRTC (CRT control
Drive) 18 drives selectively controlled under the control
Display image on V-RAM (video RAM) 19
Plasma display (PDP), where
The display mode of horizontal x vertical = 640 x 350 dots shown in Fig. 4 (a)
A and the data of width × length = 640 × 400 dots shown in FIG.
Fault display mode B can be selected. Where the fourth
The display mode A shown in FIG.
The default display mode B has 350: 400 vertical dots.
= 7: 8 difference, default display mode B table
Vertical and horizontal dots on the display screen (horizontal x vertical = 640 x 400 dots)
The display ratio of the CRT display 20 shown in FIG.
Match the screen. Therefore, the default table shown in FIG.
The graphic displayed in the display mode B is the CRT data shown in FIG.
Matches the display figure on the display screen of display 20
However, in the display mode A shown in FIG.
Be displayed in a vertically compressed display format
become. Therefore, in an embodiment of the present invention, an operator
The above display mode is achieved by the stretch display control according to the instruction.
Only for A, 7th dot dub as shown in Fig. 4
Performs raster stretch by scan, and displays
Approximate the display figure on the display A to the display figure on the CRT display 20
Let me. FIG. 2 is a processing flowchart of the display control mechanism in the above embodiment.
FIG. 3 (a) to 3 (g) are the same as those in FIG.
Display control processing (S20, S30, S40, S50, S60, S70, S80)
6 is a flowchart showing details of the process. FIG. 4 shows various display resolutions that can be switched by the above embodiment.
Screen structure on plasma display (PDP) 17
Configuration and the display screen configuration of the CRT display 20
The figure (a) shows horizontal x vertical = 640 x 350 dots.
Display screen in display mode A in matrix configuration, same figure
(B) shows the default display screen, width x height = 640 x 4
Display image of display mode B with 00 dot matrix configuration
(C) is the differential of the display mode B shown in FIG.
Display with the same number of vertical and horizontal dots as the default display screen
Display screen of CRT display 20 for displaying image information
It is. Here, as described above, the table shown in FIG.
The display screen of the display mode A and the display mode B shown in FIG.
Default display screen is in vertical dot configuration
350: 400 = 7: 8 difference, default display mode B
Vertical and horizontal on the default display screen (horizontal x vertical = 640 x 400 dots)
The dot composition ratio of the CRT display shown in FIG.
Match the display screen. Therefore, the display mode shown in FIG.
The graphic displayed in C is the CRT display shown in FIG.
It matches the display figure on the display screen of the ray.
In the display mode A shown in FIG.
It will be compressed and displayed vertically. FIG. 5 illustrates the stretching processing means according to the above embodiment.
Here, the plasma display is shown.
Selectable display mode A display image on (PDP) 17
Screen and the default display screen of display mode B are as described above.
The number of vertical dots differs by 7: 8.
Therefore, only in the display mode A, FIG.
The dot image of the 7th dot is shown in FIG.
Raster stretch by double scan and display
Approximate the display figure of card A to the display figure of CRT display
Let me. FIG. 6 shows the display character format used in the text mode.
This is an example of storing the text
Sometimes, a specific plane A on the V-RAM 19 (for example,
The second plane out of the first to fourth planes) is the CRT
Used as a display character font storage for spray 20;
Another specific plane B (for example, third plane) is plasma
Used as display character font storage for display 20
In this case, for plasma display
Two types of fonts, single font and double font
Are stored simultaneously for each block. FIG. 7 shows various display modes and flags in the above embodiment.
And TEXT is a text mode.
GRAPH is graphics mode, CRT is CRT mode, P
DP is PDP mode, S is single font display mode, D
Is the double font display mode, 400 is the display mode B (640
X 400 dots) display screen (default screen), 350 is display
Display mode A (640 x 350 dots) display screen, FG is graph
13c, FC is CRT flag 13a, FD is double
Lag 13b, FE is stretch enable flag 14b, FS is stretch enable flag.
This is the tretch flag 14a. Here, the operation of the embodiment will be described with reference to FIGS.
Explain the work. When starting up the system with turning on the system power
CPU 10 has a battery backup function (not shown)
Of setup RAM (or DIP switch)
Reads the status information and uses the contents to indicate that it is currently in use (
Set the display mode (PDP / CRT) of the display unit
A judgment is made (steps S1 and S2 in FIG. 2). Here, when the display mode of the display is in CRT mode
Indicates that the CRT flag (FC) 13a indicates the CRT mode.
Set “1” to display characters in text mode
CRT font as font (Fig. 6, blocks 0-3)
Is selected (steps S3 and S4 in FIG. 2). When the display mode of the display is not CRT mode, C
“0” indicating the PDP mode is set in the RT flag (FC) 13a
And then set up the setup RAM (or
Switch is currently in use (set from previous time)
Display font (single font /
Double font) and determine the single font
Font (Figure 4 blocks 4-7) or double font
(Fig. 6, blocks 8-11) as the display character font
(Steps S5 to S8 in FIG. 2). Display mode (PDP / CRT) and
Display character font (CRT font / PDP single font /
PDP double font) is selected and set. Here, the plasma display is set as the display mode of the display.
Ray (PDP) 17 is selected (FC = “0”), and
If a single font is selected as the
The following operation will be described. The above display mode and display character font (here, PDP
・ Single font) is set,
Below, graphics flag (FG) 13c, stretchy
Enable flag (FE) 14b and stretch flag (F
S) 14a is cleared (writing "0"), then CR
Display mode of plasma display (PDP) by T-BIOS
As the default display mode (see FIG. 4 (b)).
(640 x 400 dot matrix) is set (Fig. 2
Steps S9, S10). Application program after starting the above system
When executing the process, the BIOS mode set command is issued.
Enter the BIOS mode set routine that follows the same command
And whether the display mode is changed or not is determined as shown in FIG.
Display mode change processing as shown in (e) to (g)
(S60, S70, S80) is executed and
-An instruction to switch various display modes is input by operation.
And display switching processing as shown in FIGS. 3 (a) to 3 (d).
(S20, S30, S40, S50) are executed (step S1 in FIG. 2).
1, S12, S13, S14 ..., S11 ...). Here, the above processes are described with reference to FIGS. 3 (a) to 3 (g).
Will be explained. First, referring to FIGS. 3 (e) to 3 (g), the BIOS mode
Display mode change processing in the cut routine (S60, S70,
S80) will be described. Display mode judgment in BIOS mode set routine
(Step S14 in FIG. 2), the display mode shown in FIG.
Mode A display screen (640 × 350 dots) is set
Judgment, i.e.,
4. Display screen of default display mode B shown in FIG.
(640 × 400 dots) in the display mode A shown in FIG.
When changing to the display screen (640 x 350 dots), see Fig. 3.
The graphics mode processing shown in (g) is executed. That is, as shown in FIG. 4 (b) according to the execution software.
Display screen of default display mode B (640 x 400 dots)
Is displayed on the display screen of the display mode A (640 × 350) shown in FIG.
To change to a dot, use the graphics flag (F
G) “1” indicating graphics mode is set in 13c
Thereafter, the CRT flag (FC) 13a is referred to (step (g) in FIG. 3).
Steps S81 and S82). Here, the CRT flag (FC) 13a is set to the CRT display (C
RT) "1" indicating the display mode (CRT mode) of 20
And stretch enable flag (FE) 14b
“0” indicating switch disable (stretch disabled) is set.
After that, the CRT display is executed according to the flag contents.
A normal mode CRT display control for
(Steps S83 and S84 in FIG. 3 (g)). CRT at this time
FIG. 4 (c) shows the display screen configuration on the display 20.
The state of each flag is shown in FIG. 7 (M7). Also, the CRT flag (FC) 13a is a plasma display
If it is “0” indicating the display mode by (PDP) 17,
Stretch rice is set in the fetch enable flag (FE) 14b.
Cable (stretch permission) is set to “1”
Referring to the tretch flag (FS) 14a, the flag (F)
S) When 14a is “0” indicating the normal mode,
According to the contents of the flag, plasma display (PDP) 1
7 normal mode PDP display control is performed.
(FIG. 3 (g), steps S85, S86, S88). In this case,
Fourth display screen configuration on Plasma Display (PDP) 17
FIG. 7A shows the state of each flag in FIG. 7 (M6; FS
= “0”). That is, in this case, the stretch flag (FS) 14a
Since this is “0” which indicates the
No, the plasma display (PDP) 17 has a fourth
The display screen of the display mode A shown in FIG.
The display image is displayed in (g). The display screen (64) of the display mode A shown in FIG.
0 x 350 dots) is the actual image between the CRT display 20
Fonts are displayed neatly on the other hand,
Is done. The stretch flag (FS) 14a is stretched.
When “1” indicating (raster stretch) mode,
After that, the plasma display (PD
P) PDP display control in stretch mode for 17
(Steps S85 to S87 in FIG. 3 (g)). At this time
Display screen configuration on plasma display (PDP) 17
FIG. 4 (b) shows the state of each flag shown in FIG. 7 (M6;
S = “1”). That is, at this time, the data is read from the V-RAM 19 and the plasma is read.
Display image data displayed on the display (PDP) 17
(See FIG. 5 (a)).
(FS) 7th dot doubles according to 14a contents (“1”)
Raster stretch processing by can (see FIG. 5 (b)
4), and the default display mode shown in FIG.
Dot mat similar to display screen configuration (640 x 400 dots)
Expanded with a ricks structure (350 dots vertically expanded to 400 dots)
Large) will be displayed. The stretch function of such a plasma display
By providing, plasma display mechanism or CRT
A system that can optionally drive the display mechanism.
In the system, the display screen structure of the plasma display 17 is
When the configuration differs from the display screen configuration of the CRT display 20,
Optionally a plasma display 17 and a CRT display
The display correspondence of the real image with the i20 can be taken.
You. Also, the display mode in the above BIOS mode set routine
Display mode B in the judgment of the mode (step S14 in FIG. 2).
Display screen (640 x 400 dots) is set
Then, the graphics mode processing shown in FIG.
Is executed. In this case, the graphics flag (FG) 13c
Set “1” to indicate the
Stretch flag (FE) 14b
After setting “0” to indicate normal
The PDP display control of the mode is performed (step (f) in FIG. 3).
S71, S72). Plasma display (PDP) 17
FIG. 4 (b) shows the structure of the above display screen, and shows the state of each flag.
Is shown in FIG. 7 (M4). That is, in this case, the stretch enable flag (FE) 14
b indicates stretch disabled (stretch disabled)
"0", indicating that stretching is prohibited
Fig. 4 shows the plasma display (PDP) 17
The display screen of display mode A shown in (b) (640 × 400 dots)
The display image is displayed in (g). Also, the display mode in the above BIOS mode set routine
Text mode (step S14 in FIG. 2)
When it is recognized that the setting has been made, it is shown in FIG. 3 (e).
The text mode processing is executed. The text mode processing shown in FIG.
Fix flag (FG) 13c and stretch enable
Set the flag (FE) 14b to “0” and set the CRT flag
(FC) 13a and double flag (FD) 13b
Select a font according to the contents of each flag (FC, FD) 13a, 13b
After that, display control in the normal mode is performed (third mode).
(E) steps S60 to S66). That is, the display mode of the display
The CRT flag (FC) 13a indicating the mode is in CRT mode.
When the value is “1”, the CRT font is used as the display character font.
(Figure 3, block 0-3)
(E) Steps S61 and S62). CRT display 20 in this case
Fig. 4 (c) shows the structure of the above display screen.
The condition is shown in FIG. 7 (M3). Also, the above CRT flag (FC) 13a
Is “0”, indicating that the device is in PDP mode.
Referring to the double flag (FD) 13b, the same flag (FD) 13b
Is "1" indicating double font, double font
(Fig. 6, blocks 8-11) as the display character font
(Steps S61, S63, S64 in FIG. 3 (e)),
If the tag (FD) 13b is “0” indicating a single font,
Display characters in single font (Fig. 6, blocks 4-7)
Select as font (FIG. 3 (e) steps S61, S6)
3, S65). In this case, on the plasma display (PDP) 17
FIG. 4 (b) shows the display screen configuration, and shows the state of each flag.
Fig. 7 (Double font = M2, single font = M1)
Shown in Thus, various display modes 8 graphics mode
Setting / change, and various display files
Font (CRT font / PDP font)
Be done. CRT font / PDP font as described above, and furthermore,
Have a single font / double font selection function
Depending on the display drive target, use environment, processing target, etc.
Display output using the optimal font
it can. Next, the keys for running the application program
ー Switching of various display modes by key operation on the board 15
The process will be described with reference to FIGS. 3 (a) to 3 (d).
You. Keyboard during application program operation
Key operation on the display 15 to display characters in text mode.
Font (single font / double font)
Operation command of double / single switching key is input
And the double / single switching process shown in FIG.
Is performed. This switching process is performed by the graphics flag (FG) 13c.
“0” indicating text mode, CRT flag (FC) 13a is PDP
When "0" indicating the mode, double flag (FD) 13b
Font switching is performed according to the
(FD) When 13b is “1” indicating double font,
The double flag (FD) 13b is rewritten to “0”.
Single font according to the content of the flag (FD) 13b (No.
6 Select blocks 4 to 7) as display character fonts.
(Steps S21 to S25 in FIG. 3A). Also, the above double
Flag (FD) 13b is "0" indicating a single font
At this time, rewrite the double flag (FD) 13b to “1”,
After that, double font according to the content of flag (FD) 13b
(Fig. 6, blocks 8-11) as the display character font
(Steps S26 and S27 in FIG. 3A). In this way, the double / single switching key is operated.
Display fonts are alternately switched each time. Also, the key when operating the application program
Press key on board 15 to switch from CRT mode to PDP mode.
An operation command of the PDP switch key for switching is input.
Then, the PDP switching process shown in FIG. 3 (b) is executed. In this switching process, the CRT flag (FC) 13a sets the CRT mode.
When “1” is shown, the timing of CRTC18
From a CRT display that includes
Execute the display switching process to the plasma display, and then
Refer to Graphics Flag (FG) 13c
(FG) 13c is “1” indicating graphics mode
And further refers to the stretch flag (FS) 14a (third
(B) Steps S31 to S34). Here the stretch flag (FS) 14a is stretched
When it is “1” indicating (raster stretch) mode,
After that, the plasma display (PD
P) PDP display control in stretch mode for 17
This is done (step S35 in FIG. 3 (b)). Also, the stretch flag (FS) 14a
If the flag is “0”, the flag
No, for plasma display (PDP) 17
PDP display control in the normal mode is performed (FIG. 3 (b)
Step S36). The graphics flag (FC) 13c is text
When it is “0” indicating the mode, the double flag (F
D) Reference 13b (FIG. 3 (b), step S37). Here the double flag (FD) 13b is a single phone
When the value is "0" indicating a single font (Fig. 6
Blocks 4-7) for the plasma display (PDP) 17
Select as a display character font (Fig. 3 (b)
S38). In addition, the double flag (FD) 13b
When it is "1" indicating a font, double font (Fig. 6
Blocks 8 to 11) of plasma display (PDP) 17
Select as a display character font (Fig. 3 (b)
S39). Also, the key when operating the application program
Press key on board 15 to switch from PDP mode to CRT mode.
An operation command of the CRT switch key for switching is input.
Then, the CRT switching process shown in FIG. 3 (c) is executed. In this switching process, the CRT flag (FC) 13a sets the PDP mode.
When “0” is shown, the timing of CRTC18 timing switching (time
Display with parameter rewriting)
Performs display switching processing to the CRT display, and then
Refer to Graphics Flag (FG) 13c
(FG) 13c is “1” indicating graphics mode
After that, the CRT display 20
CRT graphics display in normal mode for
Control is performed (FIG. 3 (c), steps S41 to S44).
Also, the graphics flag (FG) 13c
When it is “0” indicating the mode, the text on the CRT display 20 is
CRT font (Fig. 6
Locks 0 to 3) are selected (FIG. 3 (c), step S4)
Five). Also, the key when operating the application program
By key operation on the board 15, the plasma display (PD
P) 17 display modes (Stretch mode / Normal mode)
Operation command of the stretch switching key
When the force is applied, the stretch switching process shown in FIG.
Be executed. In this switching process, the CRT flag (FC) 13a sets the PDP mode.
Indicates “0” and the stretch enable flag (FE) 14
b indicates stretch enable (stretch enable)
This is executed when the value is “1”.
Flag (FS) 14a is “0” indicating normal mode
When the flag (FS) 14a is stretched (raster
Rewrite) is rewritten to “1” indicating the mode.
Table in stretch mode according to the changed flag contents
Is performed (steps S51 to S5 in FIG. 3 (d)).
Five). The stretching process at this time is as described above,
Here, the description is omitted. In addition, the stretch hula
(FS) 14a is in stretch (raster stretch) mode
Is “1”, indicating that the flag (FS) 14a is normal.
Is rewritten to “0”, which indicates the
Display control in normal mode according to the flag contents
(Steps S56 and S57 in FIG. 3 (d)). In this manner, various display switching processes by key input operation are performed.
Is executed. In the above embodiment, only one CRT font is used.
However, for example, a specific plane on the V-RAM 19 shown in FIG.
Display text for CRT display using A (2nd plane)
In the unused area of the character font storage unit,
Different types of CRT fonts are stored and the two types of CRT fonts are stored.
Optional selection of one of the RT fonts
It is also possible to use it. In the above embodiment, the plasma display is used.
2 types of switchable display screen
8 dot → 9 dot stretch processing by bull scan
An example is shown, but the present invention is not limited to this.
Even if the number of modes, display screen configuration, stretching means, etc.
Good. [Effect of the Invention] As described in detail above, according to the present invention, a flat display
Optional display control of ray and CRT display
The display control mechanism that controls
Prepare unique display fonts for each display drive
Display according to the display selected as the elephant.
A structure for selectively using display fonts for play and display output
The flat display / CRT display
The best format for each display during each display drive of play
Display output, and the display drive
And clear text display with high visibility
You. In addition, several types of characters for text and graphics
By adopting a configuration that allows expression, use environment and processing
Select the best display character type with good visibility according to the elephant etc.
You can choose.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention, FIGS. 2 and 3 are flowcharts showing a display processing flow in the above embodiment, and FIG. Plasma display with various display resolutions (PD
P) A diagram showing the display screen configuration on the CRT display in comparison with the display screen configuration above, FIG. 5 is a diagram showing a specific example of the stretching process in the above embodiment, and FIG. FIG. 7 is a diagram showing an example of storing display character fonts in the text mode according to the first embodiment. FIG. 10 ... CPU, 11 ... ROM, 12 ... Stretch flag (FS), 13a
... CRT flag (FC), 13b ... Double flag (FD), 13c ... Graphics flag (FG), 14a ... Stretch flag (F
S), 14b ... stretch enable flag (FE), 15 ... keyboard (KB), 16 ... keyboard controller (KB)
C), 17: Plasma display (PDP), 18: CRT controller (CRTC), 19: Video RAM (V-RAM), 20: CR
T display (CRT).

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI G09G 5/00 520 G09G 5/00 520W

Claims (1)

(57) [Claims] A display control device for selectively performing display drive control on a flat display and a CRT display, comprising: means for selecting a display to be displayed and driven; means for storing designation information of the selected display; Specific first font and the above CR
Means for separately storing second fonts specific to the T display; and when the flat display is a display drive target, the first font is used and the CR is used.
Means for selectively reading out and displaying the first and second fonts in accordance with the designation information so that the second font is used when the T display is a display drive target. Display control device. 2. 2. The display control device according to claim 1, wherein a plurality of first fonts specific to the flat display are provided, and one of the fonts is selected and used. 3. The display control device according to claim 1, wherein the CRT display has a plurality of second fonts specific to the CRT display, and one of the fonts is selected and used. 4. 2. The display control device according to claim 1, wherein the second font specific to the CRT display is selectively converted into dots and output. 5. The first font specific to the flat display and
2. The display control device according to claim 1, wherein the second font unique to the CRT display is stored for each plane in a display memory having a multi-plane structure. 6. 2. The display control device according to claim 1, wherein the means for storing the display designation information is a memory backed up by a battery. 7. 2. The display control device according to claim 1, wherein the means for storing the display designation information is configured using a setting switch.