JPS62163480A - Video tex display device - Google Patents

Abstract

PURPOSE:To maintain the linearity between the screen of adjacent indicators by compensating substantially the screen of a part which becomes invisible by the frame of the adjacent indicator at the time of the enlarged display. CONSTITUTION:A controller 1 being an information generating means derives some position coordinate, based on a data from the inside or the outside, and derives enlarged coordinates corresponding to plural pieces of decoders 3A-3I, respectively, from said position coordinate. This enlarged coordinate is shifted by a prescribed quantity in an origin direction, on the screen of indicators 4A-4I corresponding to plural pieces of decoders 3A-3I. In this way, the screen of a part which becomes invisible by the frame of the adjacent indicator at the time of the enlarged display can be compensated, therefore, the linearity between the screens of the adjacent indicators can be maintained.

Description

[Detailed description of the invention] The present invention will be explained in the following order.

A. Field of industrial application B. Overview of the invention C. Prior art D. Problems to be solved by the invention E. Means for solving the problems (Fig. 1) F. Effect G. Circuit configuration of Embodiment 01 (Fig. 1 - Figure 3) Enlarged/reduced display of 02 screen (Figures 4 and 5) G3 enlarged data conversion
(Figures 6 and 7) G4 bezel correction (Figures 8 and 9) GslD number assignment (Figures 10 and 11)
Figure) G6 external synchronization (Figures 12 and 13) G
tFlow control UJ14, FIG. 15) Effects of the invention A Field of industrial application The present invention relates to a videotex display device suitable for use when enlarging and displaying videotex information on a plurality of displays.

B Invention alIi&! ! The present invention provides an information generating means that generates information based on internal or external data, which obtains certain positional coordinates, and from these positional coordinates expands coordinates corresponding to a plurality of decoders arranged in series. By shifting these enlarged coordinates by a predetermined amount in the direction of the origin on the screen of the display device corresponding to each decoder, the part of the screen that is hidden by the frame of the adjacent display device when it is enlarged is substantially compensated for. However, it is possible to maintain linearity between the screens of adjacent display devices.

C. Conventional technology Recently, department stores, shopping centers, station concourses,
Many multi-screen systems can be seen at show venues to attract customers. These multi-screen systems are
Multiple displays are used to obtain a large enlarged screen or a single screen.

D Problem to be Solved by the Invention By the way, when obtaining a large enlarged screen using a plurality of display devices, in the conventional system, there is a substantial step difference in the screen between the frames of adjacent display devices, resulting in an unnatural appearance. The screen tends to be connected.

This invention was made in view of this point, and it substantially compensates for both sides of the part that is invisible due to the frame of the adjacent display device when it is enlarged, and creates a space between the screens of the adjacent display device. The present invention provides a videotex display device that can maintain linearity.

E. Means for Solving the Problems The Videotex display device according to the present invention includes an information generating means (1) that generates information based on internal or external data, and this information generating means! a plurality of decoders (3^) to (3I) arranged in series with respect to L);
It is equipped with a plurality of indicators (4A) to (4■) provided respectively corresponding to the plurality of decoders (38) to (31), and the information generating means fl+ obtains certain position coordinates. , a plurality of decoders (38) to (3I
) and display the enlarged coordinates corresponding to the plurality of decoders (3A) to (3I). It is configured to shift a predetermined amount in the direction of the origin on the screens (48) to (4).

F: Find the coordinates P (x, y) of a certain position in the controller (1) as action information generating means. Next, from these coordinates, the enlarged coordinates corresponding to multiple decoders (38) to (3I) are converted to Table 1-α corresponding to each decoder. This substantially compensates for both sides of the portion that is obscured by the frames of adjacent displays, allowing linearity to be maintained between the screens of adjacent displays.

G. Example Hereinafter, an example of the present invention will be described in detail based on FIGS. 1 to 15.

01 Circuit Configuration FIG. 1 shows the overall configuration of this embodiment. In the figure, (1) is a controller as an information generating means that generates information based on internal or external data, A keyboard (2) and a printer (not shown) are connected. The controller (1) is a communication
It has a host (ICATION, hereinafter referred to as COM) and an auxiliary (AUXILIARY, hereinafter referred to as AUX) boat, receives internal/external databases on the 00M boat, performs signal processing, and then transmits them from the AUX boat.

A plurality of decoders (38) to (3■), for example, nine decoders, are provided in series with the controller (1),
Each decoder (3A) to (3I) is 00M boat, AUX
Has a port. The 00M port of the decoder (3A) is interconnected with the AUX port of the controller (1), and the AUX port of the decoder (38) is interconnected with the 00M port of the decoder (38).
The AUX port of the decoder (3B) is interconnected with the 00M port of the decoder (3C), and the AUX port of the decoder (3C) is interconnected with the 00M port of the decoder (3D).
COM ports, and so on, substantially from the controller (1) to the final decoder (
up to 3I), each 00M boat and A
Bidirectional transmission is possible between UX boats.

Also, corresponding to decoders (3A) to (3I), displays (
48) to (4■) are provided, and these indicators (48)
-(4I) are supplied with the outputs of decoders (38) to (31), respectively. In other words, using the mxn screen configuration as an example, 3x3 (9) displays (48) to (4I)
This is the case when it is formed using

The controller (1) may have a configuration as shown in FIG. 2, for example. That is, in the same figure, (1
0) is a central processing unit (hereinafter referred to as CPU),
For this CPU (10), the system ROM (11
), work RAM (12), video RAM (1
3) A color palette memory (I4), an I10 interface (15) and a floppy disk interface (16) are provided. I10 interface (1
5) is provided with the above-mentioned 00M port and AUX port, and this I10 interface (15) generates a synchronization control signal for synchronizing each decoder as described later.

A D/A conversion circuit (17) is provided on the output side of the display video RAM (13) and color palette memory (14). Further, a CRT controller (30) is provided for the CPU (10).
0) is D/D in response to the drawing command from the CPU (10).
A drawing instruction is given to the A conversion circuit (17). And D/A
The signal D/A converted by the conversion circuit (17) is processed by the video signal processing circuit (18) to form R, G, and B color signals, which are supplied to the display (19). The address position of the video RAM (13) and the display (19)
There is an I to l correspondence with the positions of pixels on the screen.

The decoders (3A) to (3I) may have a configuration as shown in FIG. In other words, in the same figure, (
20) is the CPU, and 17) The system ROM (21) and work RAM (2
2) , video RAM (23), color palette memory (24) and I10 interface (25)
is provided. The I10 interface (25) is provided with the above-mentioned 00M port and AUX port, and the above-mentioned synchronization control signal is supplied to the I10 interface (25).

A D/A conversion circuit (26) is provided on the output side of the display video RAM (23) and color palette memory (24). Further, a CRT controller (40) is provided for the CPU (20).
0) is D/D in response to a drawing command from the CPU (20).
A drawing instruction is given to the A conversion circuit (26). And D/A
The signal D/A converted by the conversion circuit (26) is processed by a video signal processing circuit (not shown) to become R, G, and B color signals and displayed on one of the corresponding displays (4A) to (4). supplied to. In other words, the configuration of the decoder is the controller (
The same configuration as 1) may be used, and of course the I10 interface (
25) may be provided with a keyboard, printer, etc.

G2 Screen Enlargement/Reduction Display Next, the enlargement/reduction display of the screen will be explained with reference to FIGS. 4 and 5. First, the program is started in step (a), and the CPU (10) reads out a certain drawing command written in the form of a bit string to the disk (not shown) via the floppy disk interface (16) and writes it to the work RAM (12). In step (B), the operands of the drawing command are analyzed to calculate the logical (on the unit screen) X-Y coordinates, and as shown in Figure 5A, the coordinates P (x, Find the value of y). Next, multiply the coordinates P (x, 'y) obtained by step (c) by α (however, α is the scaling factor and α≧0), X=αx, Y=
Coordinates P' (X, Y) of the result of scaling from αy
seek.

Determine whether the value of
Proceed to step (g) and finish.

If 0≦X≦1, proceed to step (E), judge whether the value of Y obtained here is 0≦Y≦1, and 0≦Y≦
If it is not 1, drawing cannot be performed, so proceed to step (g) and end. If 0≦Y≦1, the process advances to step (to) and the coordinate information is written to the address of the predetermined position in the video RAM (13).

At this time, the address V of the predetermined position of the video RAM (13)
-RAMadd is V-RAMadd as shown in Figure 5B.
It is determined by d-αyXmax+αX. In other words, FIG.
), where X wax represents, for example, 256 pixels, and Y max represents 200 pixels. Point P', represented by (αX, αy) in FIG. 5B, is the position where the scaled coordinates are drawn.

The scaling coordinate information written in the video RAM (13) in this way is read out under the control of the CRT controller (30), and information representing color intensity from the color palette memory (14) is added. The signal is converted into a D/A signal by a D/A conversion circuit (17), and then converted into a video signal processing circuit (18).
) is supplied to R, G.

A B color signal is formed and displayed on the display (19).

In addition, the enlargement/reduction information read from the video RAM (13) is attached with an ID (by flail) number corresponding to each decoder, and is sent to the AU of the I10 interface (15).
It is co-supplied from the X boat to decoders (38) to (3). Each decoder (3^) to (3I) takes in information to which its own ID number is added, decodes it, and displays it on the corresponding display device (4Δ) to (4I).

As a result, if the information given to all decoders (3A) to (3■) is enlarged information, displays (4A) to (4I)
) can be used to obtain one large double-sided image, and if it is reduced information, the same single screen can be obtained on each of the displays (4Δ) to (4I). Of course, other display methods are also available; for example, displays (4^), (4B), (4D), and (
4E), it is also possible to display the middle screen and display the other screens as a single screen, or to insert a single screen after displaying the -direction screen.

It is also possible to monitor the single screen on the display (19) of the controller (1) while the display screens (48) to (4) are displaying the fire direction screen.

G3 Enlarged Data Conversion Next, the case of converting original data into enlarged display data corresponding to each decoder will be explained with reference to FIGS. 6 and 7. First, start the program in step (a), read out a certain drawing command written in a bit string on the disk via the floppy disk interface (16), expand it to the work RAM (12), and proceed to step (b).
The operands of the drawing command are analyzed in , the logical X-Y coordinates are calculated, and the value of P (x, y) is determined.

Next, in step (c), P' (nx-i, my-
Find the X-Y coordinates enlarged by j). V(, n
This is data for a (t, j) decoder with a (horizontal) x m (vertical) screen configuration. Here, i and j are i x Q~n-1,j=
It is 0 to m-1. Then, in step (d), P'
Encode the drawing command using (nx-i+my-j). In other words, the enlarged X-Y coordinates are returned to normal drawing commands. As a result, the decoder side can obtain an enlarged display by decoding normally without neglecting enlargement.

In step (E), determine whether all (i, j) have been calculated, that is, whether the enlarged display data has been converted for all decoders. If the calculation has not been performed, proceed to step (t). , J are changed and the same operation as described above is repeated. When all (1, j) have been calculated, the program proceeds to step (g) and ends the program.

By the way, n=3. Data conversion for three times enlarged display will be explained with m=3 using FIG. In Figure 7, ■～■
corresponds to decoders (3A) to (3■), and (i, j)
Let i be 0.1.2, j be 0,1°2, the decoder of ■ is (0,0), the decoder of ■ is (1,0), the decoder of ■ is (2,0), ■ The decoder for ■ is (0,1), the decoder for ■ is (1°1), the decoder for ■ is (2,1), the decoder for ■ is (0,2), the decoder for ■ is (1,2), ■
The decoder of is expressed as (2,2). And P′(n
x-4+my-j), the coordinates P(
x, y) is transformed for each decoder as follows.

■Decoder...P' (3x, 3y)■Decoder...P' (3x-1, 3y)■Decoder...P'(3χ-2+3y)■■Decoder...P
'(3x, 3y-1)■decoder...P'
(3x-1, 3y-1)■ Decoder...P'
(3x-2+3y-1)■Decoder...P'
(3x, 3y-2)■Decoder...P'
Decoder of (3x-1, 3y-2)■...P' (
3x-2, 3y-2) Therefore, from (Xt, 3It) (
X2. )'2) A drawing command that draws a line toward (3X1, 3yt) to (3
From (3x-1, 3y) to (3X2
-1°3y2) corresponds to the line (3xL -2, 3y1-2) to (3X2-2+3V2-2) for the decoder of the line (3).

Here, the relationship between the ID number and the decoder (t, j) is expressed as ID=jn+i. For example, the decoder for (0, O) is 0 (decoder for ■), and the decoder for (1, O) is 1
(Decoder of ■)... The decoder of (2, 2) is 8
It will look like (■ decoder).

G4 Bezel Correction Now, when one screen is displayed on multiple displays, the frame (bezel) of the display becomes a problem, and it is desirable to have multiple displays so that even if there is this frame, there is no frame. I want to display the screen with . That is, when a single screen is displayed using a plurality of display devices, a difference in level inevitably occurs between the frames of adjacent display devices, and the displayed screen becomes unnatural. A method for solving this problem will now be described with reference to FIGS. 8 and 9. First, run the program in step (a)
FI (+&, front disk interface (
A certain coordinate written in a bit string on the disk via the IG) is read out and expanded to the work RAM (12),
In step (b), the operands of the drawing command are analyzed, logical X-Y coordinates are calculated, and the value of P (x, y) is determined.

Find the X-Y coordinates enlarged by α α. Here, α is the display rate and has a relationship of 0≦α≦1. This X-Y coordinate is data for a (t,j) decoder with an nXm screen configuration. Then, in step (d), it is determined whether all (t, j) have been calculated in step (e), that is, whether the above coordinates have been obtained for all decoders, and if they have not been calculated, step Proceed to step (3), change the values of l and j, and repeat the same operation as described above. And all (i.

When the calculation for j) is completed, proceed to step (g) and end the program.

In connection with the operation shown in FIG. 8, the display state of a certain display on the decoder side will be explained using FIG. 9. In FIG. 9, a is a physical display area that can be displayed on the display, and b is a frame of the display that includes a border and a bezel portion. Therefore, FIG. 9 shows two displays with adjacent frames. When the X-Y coordinate P (x, y) is determined in step (b) of Fig. 8,
This is displayed within the display area a of a certain display on the decoder side. Further, C represents a certain straight line drawn within the two display areas a. When the enlarged X-Y coordinates are determined in step (c) of FIG. 8, they are displayed within the enlarged virtual display frame indicated by the broken line d in FIG. 9A, although not shown. Then, as shown in FIG. 9B, this enlarged virtual display frame is the coordinate obtained in step (d) of the origin map. Then, as can be seen from FIG. 9B, the virtual display frame almost matches the actual frame. At this time,
The straight line C shown in FIG. 9A is displayed at a slightly lower position in FIG. 9B. However, the linearity of the straight line C in the left display area and the straight line C in the right display area is maintained. In other words, there is no difference in level between the frames of adjacent display devices.

Next, the procedure for allocating an ID number to each decoder will be explained with reference to FIGS. 10 and 11. First, step (a)
Start the program with step (b) and start the decoder (3A
) is the ID as shown in Figure 10 from the controller (1).
Check whether the allocated data sequence is being sent. In step (c), the decoder (38) determines whether the information sent from the controller (11) is an ID allocation data sequence, and if not, proceeds to step (38) and ends the program. , if so, it stores and saves the ID number included in the data sequence as its own ID number.Then, it is initialized.

Next, the decoder (3^) increments its own 10 number by one in step (e), and the next stage decoder (3B)
The ID number is output to the AUX boat, and the program ends at step (to).

Similarly, the decoder (3B) stores the ID number supplied from the decoder (3A) as its own ID number, and is initialized. Then, the decoder (3B) increments its own ID number by one and performs the next Stage decoder (3C)
output to the AUX boat as the ID number. Below (3D
) to (3) are sequentially performed, and the assignment of ID numbers to all decoders (3A) to (3) is completed.

G6 external synchronization Next, when applying external synchronization to each decoder, in other words, the decoder (3A
) to (3I) will be explained with reference to FIGS. 12 and 13. Figure 12 shows the controller (
In the operation of 1), Fig. 13 shows the decoders (3A) to (3I).
This is the operation. First, the program is started in step (a), and in step (b), the controller (1) sets the synchronous control signal output from the I10 interface (15) to one level, for example, low level. Next, in step (c), the controller (1) operates the decoders (3A) to (3■
) send all data to. In step (d), the controller (1) sets the synchronous control signal output from the I10 interface (15) to the other level, for example, high level, after all data transmission is completed. End the program at step (E).

On the other hand, each of the decoders (3A) to (3) starts a program in step (a), and receives data from the 00M port in step (b). In step (c), the received data is output to the AUX port.

In step (d), it is determined whether the synchronous control signal supplied from the I10 interface (15) of the controller (1) to the I10 interface (25) of each decoder is at high level, and if it is not high level, that is, it is low level. If so, the process returns to step (b), and if the level is high, the process proceeds to step (e) to start decoding the data. In step (v), it is determined whether the data has ended or not. If the data has not ended, the process returns to step (d), and if the data has ended, the process advances to step (g) to end the program.

The knobs and decoders (3^) to (3I) are the controller (
While the synchronization control signal from 1) is at low level, data is only taken in and no decoding is performed, and when the synchronization control signal becomes high level, decoding starts all at once.

G7 Flow Control Next, when an overflow of data in a serially connected decoder is detected, the flow control procedure for instructing the preceding decoder to stop outputting data will be explained with reference to FIGS. 14 and 15. .

First, in FIG. 14, the controller (1) has a transmit buffer TC, a receive buffer TR, a transmit buffer TA, and a receive buffer RA on the work RAM (12) for the 00M port and the AUX port, respectively. In the figure, only the transmission buffer TA and reception buffer RA on the AUX boat side are shown. Each decoder also has a transmit buffer TC, a receive buffer RC, a transmit buffer TA, and a receive buffer RA on the work RAM (12) for the 00M port and the AUX port, respectively. and,
Transmission buffer TA of AUX boat of controller (1)
The data in the transmit buffer TC of the 00M boat of the decoder (3^) is transmitted to the receive buffer RC of the 00M boat of the decoder (3A), and the data of the transmit buffer TC of the 00M boat of the decoder (3^) is transmitted to the A of the controller (1).
It is transmitted to the reception buffer RA of the UX boat. In other words, it is considered to be bidirectional transmission. Also, the AU of the decoder (3A)
The data in the transmission buffer TA of the X boat is sent to the decoder (3B
) is transmitted to the reception buffer RC of the 00M port of the decoder (3B), and the data in the transmission buffer TC of the 00M port of the decoder (3B) is transmitted to the reception buffer R of the AUX port of the decoder (38).
It is transmitted to A. In other words, in this case as well, the transmission is bidirectional. Bidirectional transmission is also possible between other decoders.

In such a configuration, for example, a decoder (
The operations between 3^) and (3C) will be explained with reference to FIG. The program starts at step (A) and steps (
(b) Whether the receive buffer RC of the 00M boat of the decoder (3B) becomes full or not, that is, the receive buffer RC
It is determined whether or not the buffer has overflowed, and if it becomes full, a transmission stop signal Xoff is outputted to the transmission buffer TC of the 00M port of the decoder (3B) in step (c).

This transmission stop signal Xoff is received by the reception buffer RA of the AUX port of the preceding decoder (3A), and the decoder (3^) stops transferring data to the decoder (3B). If it is not full at step (B), step (
Proceed to step d).

In step (d), it is determined whether the reception buffer RA of the AUX port of the decoder (3B) is full or not, and when it is full, the transmission to the transmission buffer TA of the AUX port of the decoder (3B) is stopped in step (e). Outputs a signal X off. This transmission stop signal Xoff is sent to the subsequent decoder (
3C) is received by the reception buffer RC of the 00M port,
The decoder (3C) stops transferring data to the decoder (3B). If it is not full in step (d), proceed to step (go).

In step (to), it is determined whether or not the transmission stop signal
Proceed to. In step (g), it is determined whether there is space in the reception buffer RC of the 00M boat of the decoder (3B),
If there is space, a transmission restart signal Xon is output to the transmission buffer TC of the 00M port of the step boil decoder (3B). This transmission restart signal Xon is sent to the previous stage decoder (3^)
The decoder (38) resumes data transfer to the decoder (3B). If the transmission stop signal Xoff is not output in step (g) and there is no free space in the reception buffer RC in step (g), the process advances to step (su).

In step (S), it is determined whether the transmission stop signal X off has been output to the transmission buffer TA of the AUX port of the decoder (3B), and if it has been output, the process advances to step (N). Decoder (3B) AUX in step (nu)
It is determined whether there is space in the reception buffer RA of the boat, and if there is space, the A of the decoder (3B) is
A transmission restart signal Xon is output to the transmission buffer TA of the UX port. This transmission restart signal Xon is sent to the subsequent decoder (
3C) is received by the reception buffer RC of the 00M port,
The decoder (3C) resumes transferring data to the decoder (3B). Then, step (wo) ends the program. Also, in step (wa), the transmission stop signal':Xoff
is not output and if there is no space in the receiving bass disk RA at step (N), the program proceeds to step 7 and ends the program.

Similar operations are possible between the controller (11) and the decoder (38) and each decoder.

Effects of the Invention H As described above, according to the present invention, the information generating means obtains certain position coordinates, from which enlarged coordinates corresponding to a plurality of decoders are respectively obtained, and these enlarged coordinates are displayed on the display corresponding to each decoder. Since the screen is shifted by a predetermined amount in the direction of the origin, the part of the screen that becomes invisible due to the frame (bezel) of the adjacent display when it is enlarged is substantially compensated for, and the gap between the screens of the adjacent display is can maintain linearity,
It looks like you're looking at the other side of a grid, and you can see certain things right there.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is a block diagram showing an example of the controller used in Fig. 1, and Fig. 3 is a block diagram showing an example of the decoder used in Fig. 1. 1, 4, and 5 are flowcharts and diagrams for explaining screen enlargement/reduction display, and FIGS. 6 and 7 are flowcharts and diagrams for explaining enlarged data conversion, respectively. 8 and 9 are a flowchart and a diagram for explaining bezel correction, respectively.
11 and 11 are flowcharts and diagrams, respectively, for explaining ID number assignment, and FIGS. 12 and 13 are flowcharts, respectively, for explaining external synchronization.
FIG. 14 and FIG. 15 are a configuration diagram and a flowchart, respectively, for explaining flow control. (1) is the controller, (2) is the keyboard, (3^)
-(3) are decoders, and (48) to (4I) are indicators.

Claims (1)

[Claims] Information generating means for generating information based on internal or external data; a plurality of decoders disposed in series with the information generating means; and the plurality of decoders. a plurality of display units respectively provided in correspondence with each other; the information generation means determines certain position coordinates, from the position coordinates, respectively determines enlarged coordinates corresponding to the plurality of decoders; A videotex display device, characterized in that the screens of the plurality of displays corresponding to the plurality of decoders are shifted by a predetermined amount in the direction of the origin.