JPS58125134A - Readout system of coordinate position on display screen - Google Patents

Abstract

PURPOSE:To indicate coordinate positions on display screens of plural display monitors with one light pen by performing display control at the same timing and discriminating a display monitor corresponding to a readout at a coordinate position on a display screen. CONSTITUTION:At the scanning line of each character display position on the display screen of a CRT monitor 4011, a prescribed pattern for light pen detection is displayed. In the setting period of an F/F704, on the other hand, an AND4052 is opened only while a decoding signal DEC2 is inputted from a decoder 505. Then, pattern information generated by a detection pattern generator 503 is outputted to a monitor side 4012. As a result, while a raster scan on the scanning line of each display line is made, a serial video signal is inputted to the monitor 4012. Therefore, the pattern for light pen detection is displayed on a scanning line at each character display position on the CRT4012.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a system for determining the coordinate position a of a display screen, which is applied to a system equipped with a plurality of raster scan type display monitors.

Technical Background of the Invention The position on one side of a display monitor such as a CRT monitor (ffl
A light pen is generally used to indicate image position) fc.One light pen is generally prepared for each OCRT monitor.However, in fields such as gross control, for example, Two CRT monitors are lined up side by side, and one operator uses a light pen to indicate the position on the inner monitor Ili#J.

Sometimes it happens. This is necessary when there is too much optical information to be displayed on one CRT monitor.

It is also necessary in a mutual PA/QUAG system in which when a CRT display device becomes unusable due to a failure or the like, the remaining CRT display devices are used to carry out business operations.

As a background technology, when one operator uses one light pen to indicate the positions on the screen of two CRT monitors as described above, which monitor should the operator use each time? This has the disadvantage that work efficiency is reduced because an operation has to be performed to specify the . In addition, if you make a mistake in the specified masterpiece above,
This has the disadvantage that incorrect (b) indications are made to the system, causing troubles such as v4 operation.

OBJECTS OF THE INVENTION The present invention has been made in view of the above circumstances and is capable of reading the coordinate position of a display screen on which a light is applied and the corresponding display monitor without performing any special operation for specifying the sled. The purpose of the present invention is to provide a method for reading the coordinate position of the display plane 11i, which can identify the coordinate position tm of the display plane 11i of a plurality of display monitors and can indicate the coordinate position tm of the display plane 11i of a plurality of display monitors with a single light pen.

Summary of the Invention In a system equipped with a plurality of display monitors using the rasmet scan method, display control is performed on the plurality of display monitors at the same timing, and from write-in to Q
- (Set the coordinate position reading block flag t in response to the ion signal to enter the coordinate position reading mode, and during the period of this reading mode, the normal screen display on each of the display monitors above will be displayed. The light pen detection mark 7 is displayed on different scanning lines predetermined for each display monitor in each unit display area on the display screen of the plurality of display monitors, and the light pen detection mark 7 is set in the sitting position IJiL reading mode. Light - This light at the time when light detection was performed at 7 - (/ is indicated by (1) and the coordinate position on the 9 machine display screen is read, and the time at which light detection was performed at V
The system is designed to determine which display monitor the reading coordinate position is from by knowing the current scanning line.

Embodiment of the Invention FIG. 1 shows an embodiment of, for example, a lakeside system to which the present invention is applied, and 10 is a micronorocessor that controls the entire system.

20 is each 梼micro! 3o is a communication adapter for all communications with the host machine.

"l + 402 is the CRT display part, 50 is these C
IiO, which is a CRT controller (hereinafter referred to as CRTC) that commonly controls the RT display section 'O1+401, is a CRT controller (hereinafter referred to as CRTC) that controls these microprocessors 10. Program memory 20
, communication adapter JO, CRT display fdh401.40
@, &C1! TOj This is the system path to which the OS is connected.

CRT fi"'s + 40B, 40
11゜4011 is CRT monitor, 4071 * 402
M is a refresh memory in which display code information (character codes, etc.) for one screen of the CRT monitor 40c*401B is stored. 4031.4o3g is 171! from the address position indicated by the concatenation information between the display code read from the refresh memory and the rask address output from the rask fi counter 504, which will be described later. This is a character generator that generates display turns (letters, f-turns, etc.) for each scan line. 4041.404g is a character generator 4031.463. The output of INV 705, which will be described later, is input and dart (hereinafter referred to as AND), -'4.
01ih4053 is a detection pattern turn generator 50 which will be described later.
1 (Q output and F/) [FF The output of F F 04 is input in common, and the corresponding decode signals DHCI and DECJ output from the decoder so6 are input. 4061.40i
s is AND4041,404g output and mD405
．． .

The output of 406m is input to the OR gate (hereinafter referred to as OR, 407%, 407g is the output of O'B4O6 (parallel display/?turn r-ta)'eti column f-ta is converted into parallel/ Series transformer (hereinafter referred to as parallel transformer)
Demeru. The output of the parallel to serial converter 4071.degree. 4011 is transferred to the CRT monitor 4011.401g as a video signal.

CRTC50VCν, 501 is a scanning counter. Scanning counter 501 is CRT417J and CRT4011I
It operates in synchronization with the I&11 plane scanning, and the screen position (early position table 7 of narrow display plane) < area, for example, the coordinate position of the character display position [)
A refresh address of refresh memory 4011r4023 corresponding to is generated. The scan counter 501 consists of a refresh, an X counter 5011 that updates the column address of the memory 4023 and 402, and a Y color 501b that updates the (-1) address t-jl! 502 is the coordinate. This is a position reno star (hereinafter simply referred to as a reno star).The reno star 501 will be described later.myoy
The count output of the scan counter 501 is loaded in accordance with the output of the IC (for example, the rising timing). 50
3 is a light (for detection, detection nozzle that generates arm turn)
It is a turn generator. In this embodiment, a space between characters and spaces between lines (including - spaces) are allocated to one character display, including 7 horizontal dots, 8 vertical lines (8 dots), and light pen detection. The ivy turns for light pen detection are displayed only on 91 scan lines per character display position.In other words, the detection arm/generator 50J generates a fixed ivy turn for light pen detection for one scan twin. ing.

In this embodiment, the detection sensor/generator SOS is a 7-bit binary information "0" as a light pen detection sensor/generator.
111100". 5Q.4 is a raster counter (scanning address counter) that counts scanning lines and operates in synchronization with the screen scanning of ToDs CRT 4011.401H. The count output of raster counter 504 is for each display line. In this embodiment, the decoder 505 indicates the scan line number, that is, the raster address (scanning address). 506 is the raster address output δ from the raster counter 504. In this embodiment, the decoder 505 detects the raster address 7! scan line 1~ When indicating scan line 1 of scan line 8, there is a line "'" on signal -606.
A decode signal DEC1 of logic ``1'' is output, and a decode signal DEC2 of logic ``1'' is output on the signal line 507 when two scan lines are displayed. so8 is a timing generator. The tie generator 508 is a CRT monitor 4011
*401@f In order to control the display at the same timing, C
RT monitor 4011.401. A common synchronizing signal 1111 is input to the CRT display section 401.

401 outputs a timing signal for updating the count of the scan counter 501 and the raster counter 504 that are shared by 701 is a light pen, and 702 is a light pen 70, for example.
1 has a built-in photoelectric conversion circuit. The photoelectric conversion circuit 702 uses a light pen ROX as a CRT monitor 4ell.
, 401m display image EIK: When pressed and light detection is performed, a light detection signal LPDii is generated in response to this light detection.
iT t @live. 10J is the switch-on signal 5WON from light pen 101? Niji Stem Bath 600%
Signal for guiding y4C, 104 is the coordinate position picture for instructing to take the coordinate position OII (coordinate position reading mode) of 9 2 i*@ which is instructed by light pen operation *p7
Rig float f (hereinafter referred to as b). Ko0F
Ar y 04 is a signal @VOS, and when the switch-on signal 8WON is transmitted to one microprocessor 10V via the system path 60, the microprocessor 10
is set by

705 is a level inverter for the output of F7/F 704.
Parter (hereinafter referred to as INV), 1061e706,
f-1A1slD (17Yl'-t), 707'dOR
(or dirt) h h e AND r 06 l+
T Og m K commonly receives the photodetection signal LPDET output from the photoelectric conversion circuit rO2 and the output of IF/7704, and also receives the corresponding f code signals DICCJ and DECJ output from the decoder SOS.
AND 7061, 71 is input to eOR7oy
06. The valley output of is input @ 10B @ +70jl
l is AND70f, 7015 snow Anne P * event formation is remembered frig 70! (hereinafter referred to as Fshio).

Next, the operation sound W5 of the configuration shown in FIG. 1 will be explained. The system is now in the normal state 1!1 when the light pen 701 is not operated.
6. Mayu, each refresh and memory 4021*402@I/C in the CRT Ibarashim"h*4's are characters input from the host machine via the communication adapter 30 and edited by the microno processor 10, for example. CR to which bay code information such as code corresponds
T monitor 401, . It is assumed that one screen of 401g is stored. The contents of the refresh memory 4031.402g are updated on the CRT monitor 405.401 by the address information from the scanning color/reader 501 whose count is updated by the timing control from the timing generation 'a' 501.
The images are sequentially read out in synchronization with the scanning of the 3rd plane. Then, among the 9 turns of display corresponding to each display call read from the refresh memo IJ 4021 r402B, each display turn for the scanning line indicated by the raster address output from 2 of the character turnters 402 and the nerator 40 is Output from j 1 * 4031 Character generator 40 J, , 40
3. AND 4041*404B % OR40f e for each display pattern of 247 minutes of l-scanning output.
The signal is input to parallel to serial converters 4071 and 401B via 406@, and is converted into a serial video signal. Each video signal is outputted to the corresponding CRT monitor 401 and 40JIK, and the timing generator 50# performs the same screen scan, so that the corresponding I/O signal is output at the same timing.
M-plane display is performed.

In such a state, the operator operates the light (7101) to read, for example, the CR of the CRT fi display/4014.
Assume that the detection section of the light pen 701 is pressed against a desired character display position (coordinate position) on the optical display screen of the T-monitor 4011. This will cause the pen switch of the light (n101) to
(not shown) is activated, and a switch-on signal BWON is generated. This switch-on signal 5WON is a signal @703,
' / is transmitted to the microprocessor 10 via the axis line of the stem path 60 as interrupt number 15, for example. As a result, the micronolocessor 10 crawls (77
It is determined that 01 is pressed onto the display ll1j song on either CRT monitor 401% or 401g, and F/
F 704 Set f to read the coordinate position.

When F/F 7 o 4 is set and the output of F/F' 704 becomes logic '1', the output of INV'105 becomes logic 10' and AND 404. ．． 404. becomes closed. As a result, the characters 403, . 4
03. Display output from) Mother turn CRT monitor 4
Output to 011.4013 is prohibited, and normal one-page display is prohibited. The output of F/F F04 is AND 4
051.40f respectively.

The decode signals Dh:C1 and DECI output from the decoder 505 are input to this AND 4053.405g. This r code signal oEc i
During the period when the raster address output from the raster counter 504 indicates the set meal line 1t, the decoder 505
Also, the decode signal DECI is a raster callan! The raster address output from 504 is ff1
f line 2 [During the period shown, the decoder is also 505
is output from. AND405. is in an open state only while the above decode signal DEC1 is input from r come jO5 during the setting period of F/F 704, and the light pen detection/main turn information generated from detection/middle turn generator 503 is in an open state. ” 0111100 ' tC
Output to RT monitor 4011-. As a result, the serial video signal "0111100" is repeatedly displayed on the CRT monitor 4011 during the period in which the scanning line/1 of each display line consisting of eight scanning lines is being rasterized.
is input. Therefore, during the setting period of F/7 r 04 (during the coordinate position reading mode period), the CRT
The display contents of the monitor 4011 are as shown in FIG. 2(1). In other words, the display of CRT QC monitor 4011-
A predetermined light pen detection pattern is displayed at each character display position O scanning line 1 on the surface.

-10,000, AND475. During the setting period of F/F 704, the above decode signal L)E is sent from Gakko〆505.
It remains open only while Cj is being input, and outputs IIJ light detection pattern information "0111100" generated from the detection nog turn generator 503 to the CRT monitor 401 Fuki. As a result, CRT 724
01m, during the period when scanning line 2 of each row, which is composed of 8 scanning lines, is being raster scanned,
A serial video signal "0111100" is repeatedly input. Therefore, during the setting period of the F/F 704 (during the remote period), the CRT 401.
The displayed contents are as shown in FIG. 2(b). That is, CkiT401. In this case, the light pen detection gloss turn is displayed on the scanning pin at each character display position.

As described above, it should be noted that in this embodiment, the display position of the light pen detection pattern is different for each of the T and CttT monitors, that is, the display timing is different.

By displaying the light pen detection pattern on the CRT monitor 4011.401@, light detection by the light pen '101 becomes flexible. In this example, the light pen FO
J is pressed against the character display position of the instruction screen of the CRT monitor 4011.Then, at the timing when the scan 2 in 1 is being raster scanned, the light pen 101 is pressed against the character display position of the CRT monitor 4011. Detects the light from the light pen detection gloss turn displayed at the position. This original signal is then transferred to the photoelectric conversion circuit F.
The optical detection signal LPDK is converted into an electrical signal by OJ.
Output as T. This photodetection signal LPDET is
rOf, 106. are input respectively. ANDrO
#l has the output of F/IF 704 and r cog 50
5 specific decoding output or r code P signal DEC1
is input.

As is clear, the 2-item pen 101 is connected to the CRT monitor 40.
The decoded signal D is applied to the output timing of the photodetection signal LPDKT obtained by pressing the photodetection signal LPDKT to
It follows the output timing of ECJ, and as a result, the a7tP condition of AND 70 g is satisfied, and the output becomes ffi'1#. On the other hand, the output of the F/F 704 and the specific decoding output of the f-cog 505, that is, the r-code signal DECJ, are input to the AND 70g. As is clear, the output timing of the photodetection signal LPDET obtained by pressing the Futope/101 against the CRT 40 is the same as the decode signal DEC.
It is different from the output timing of j, so AND
The AND condition of 7061 does not hold, and its output is logical [″0
@ AND7 (the logic 11 of 761 "l" output is output to the register 502 by pressing 0R70F, which causes the content of the scan counter 501 at that time, that is, the light pen 10
The coordinate information of the screen position (character display position) where 1 is pressed is loaded into the register 502. Also, AND 7
0 Logic ""l" output of #t [is output to Fβ7081, which sets Me4'7081.
/Frog Yu is the corresponding AND70g, the output is logic @
O”, so it is unlikely to be set @F/F
7 D J, no se, tlj force t'! system path 60
r) The microprocessor 10 determines that the light detection is complete and that the light detection was performed by operating the light pen on the CRT monitor 4011. In this case, the output of 01t7or is transmitted as a light detection completion notification signal to the microgross processor 10 via a specific line of the system path 60, and the microgross processor 10 responds to this light detection completion notification signal. /T/ 70f a 108B
CRT monitor 4 depending on which output is logic 111, F/770f or 708g.
01%.

It may be determined which of the CRT monitors 401m the light pen operation was performed on.1 When the microprocessor XO learns that the light detection is completed, it reads the contents held in the register 502.As a result, the microprocessor 10 The microgross processor 10 is F/F 704, F rosl,
vog.

t IJ upper set, ready for next light pen operation.

Incidentally, the above description of the operation is based on the case where the light pen operation is performed on the CRT monitor 4011, but the same applies to the case where the light pen operation is performed on the CRT monitor 401. However, in this case
D706. The AND condition was completed and 708g of F/F was set. And F/77 III B
The set output allows microprocessor IQ to signal that a write operation has been performed on CRT monitor 401!.

In this way, according to this embodiment, each CRT display section has 40%,
Display control is performed at the same timing for 40 years of CRT monitors 4071 m 401 B, and for light pen detection) 9 tars/¥i-CRT %2 4011
,401. Since each CRT monitor has its own unique scanning line Vc, the operator can easily tell which CRT monitor is being used. The microprocessor only needs to determine whether the last scan of the ninth scan line was performed during the last scan to notify the user that the light pen has been operated for 90 RT monitor km. Moreover, the above judgment FiF/F7081*1
Since it is only necessary to check the contents of 081, the microprocessor required for the above judgment is extremely simple.According to this embodiment, as described above, it is possible to switch which CRT monitor is being used. Since there is no need for manual operation, not only is there no need for a special circuit for this purpose, but there is also no risk of erroneous operation due to erroneous '#-coordinate designation due to an erroneous designation operation, which improves reliability.

Furthermore, according to this embodiment, the above-mentioned specifying operation is unnecessary,
The operator simply presses the light onto the desired display screen of the CRT monitor, which improves work efficiency.

In the above embodiment, the present invention was applied to a system equipped with t-2 CRT monitor tubes. 19. The present invention is applicable not only to text display but also to graphical display systems, and not only to industrial CRT monitor and conference use systems but also to any system that performs a rasmet scan method display. It can be passed.

Effects of the Invention As described above, according to the method of reading the coordinate position of the display image of the present invention, the operator does not have to perform the ninth special operation of specifying the monitor of the target table. , the light pen/f'L table can read the coordinate position of the screen and display the corresponding display monitor, and one light pen can indicate the coordinate position of the display screen of multiple display monitors. I'm happy to do that.

[Brief explanation of the drawing]

Figure iA1 Figure 1072 showing an embodiment of the system to which the present invention is applied, Figures 2 (a) and (b) are for light pen detection and ζ turn of two display monitors at 11 mark position d remote 0 It is a figure which shows each display example t. 10...Microgrosse, 50...CRT controller (CRTC% display controller), 40ha. 401, ・CRT monitor (display monitor), 4021
+4021-...refre, shi, memory, 4031*4(
'J*...Character generator, 40f +40
43a40f a4051#7061 +106s...
・AND gate (AND), 501...scanning force/
502...Coordinate position register, 503...Detection number turn generator, 504...Raster color/ri(,i
address counter), SOS... r Korg, 101
...Light pen, 704...Coordinate position M take fritsunoflora! (F/F).

Claims (1)

[Claims] In a system equipped with 11 raster scan type display monitors, a display controller that performs display control at the same timing on the plurality of display monitors, and a display controller that is activated by a pen switch on signal from a light pen,
Coordinate location layout! A means for setting a frog,
a decoder that decodes a scan address indicating a scan line number output from a scan address quanta; and a decoder that decodes a scan address indicating a scan line number outputted from a scan address quanta; means for displaying the light pen detection turn on each different scanning line of the display area; Screen table other than turn - Momo, L -
During the setting period of +λ mountain - 1f float, the coordinates of the corresponding display monitor 0, which is activated by the light detection signal from the light pen and indicated by the light pen. comprising means for reading the position;
The information from which display monitor the coordinate position read by this means comes from is determined according to the r code output of the decoder when activated by the light detection signal from the light pen. 9 methods for reading the coordinate position of the display screen.