JPS5948416B2 - Image display device using a light pen - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image display device that uses a light pen to control a display image on a CRT screen.

This type of image display device is widely used in various fields due to its versatility, and color display devices in particular are becoming indispensable in the field of graphic displays.
In the case of this color display device, there is not much of a problem when displaying a simple color image, but in the case of a complex color image, it may not be possible to produce a subtle color image simply by using designated colors with a constant hue. In such cases, the final CR
In T, the only way to do this is to fine-tune the hue of each color of red, green, and blue in an analog way, which caused the problem of lack of generality.

The present invention has been made in view of these problems, and provides an image display in which the gradation of each of the three primary colors of red, green, and blue can be controlled by instructions from a light pen. It provides equipment.

FIG. 1 shows a CRT screen according to the present invention, where I is an image area where image information is displayed, and . . . are instruction areas for instructing display operations in this image area I.

As shown in detail in Fig. 2, this instruction area (■) shows a color specification area A for specifying the display color, and the gradations for each of the three primary colors of the specified color in the color specification area A. At the same time, a gradation control area B controls the gradation of each color, a thickness area C specifies the thickness of the line to be drawn when drawing with a light pen, and a mesh at intervals specified with a separate light pen is displayed. mesh area D, scale area E that represents a scale at predetermined intervals; camera area F that enables input from the television camera; freeze area G that captures this camera input into memory as a fixed image; A horizontal/vertical straight line designation area H for specifying, a fixed point designation area J for specifying the starting point and end point of straight line drawing, and an interval when displaying an a-yomime, and a straight line area K1 for drawing a straight line between the two designated fixed points. Hollow circular area L for drawing a punched circle,
A hollow rectangular area M for drawing a hollow rectangle, an enlargement area N for instructing to enlarge the image, a coating area 0 for filling in the display area surrounded by the display line, a circular area P for drawing a fill-in circle, and a fill-in rectangle for drawing. a rectangular area Q for changing the display color, a color change area R for instructing a change in display color, a move area S for transferring a predetermined display block, a move super area T for transferring only necessary colors without unnecessary colors, and a move enlarge area for enlarging and transferring. area U, move enlarge super area V for enlarging and transferring only necessary colors, first timer area W for controlling and instructing waiting time between unit operations, and second timer area for controlling and instructing operation speed.
A 3t timer area X and a timer time area Y for instructing timer times in these timer areas are divided. Next, the internal configuration of an image display device that displays partitioned display areas will be described with reference to FIG. 3.

1 and 2 are main and auxiliary CRTs, and a light pen 3 for indicating the screen of each CRT 1 and 2 is provided.

A light pen signal obtained by instructing with the light pen 3 is applied to the main and auxiliary judgment circuits 4,
The CRT indicated by the CRT is determined and sent to the central processing unit (CPU) via the light pen signal processing circuit 5 and the light pen address determination circuit 6, and finally the CRT
The data is stored via a controller 8 in floppy memories 7, 7, 7 connected to the PU. Further, the image information stored in the floppy memories 7, 7, 7 is given to the input switching circuit 9 via the CPU, and is sent to a pair of RAMs 10, 10, 1.
Video RAM 12, 1 configured by 1, 11
3, and each RAM 10, 10, 11, 1
Shift registers 14, 15, 1 provided corresponding to 1
6, 17, selectors 18, 19 for selecting which of the video RAMs 12, 13 the contents are to be read out;
Table ordinal groove 1 corresponding to each auxiliary CRT 1 and 2
The signal is supplied to each CRT 1, 2 via control circuits 20, 21 and displayed. Reference numeral 22 denotes a television camera connected to the input switching circuit 9 via an A/D conversion circuit 23, to which image information captured by the camera 22 is input in place of the image information from the floppy memories 7, 7, 7. , CRTs 1 and 2, and the captured image information is stored in floppy memories 7, 7, 7 via the CPU as necessary.

Reference numeral 24 denotes a flash prohibition circuit provided between the main CRT 1 and its corresponding display control circuit 20, which normally flashes to make the indicated location clear when the light pen 3 indicates the CRT screen. The operation is prohibited only for this main CRT 1.

The reason for providing this flash prohibition circuit 24 is this main CR.
Since T1 is an external system, for example, a broadcasting station, it is a transmitting device or a large number of monitor televisions that display the image itself that can be seen directly by many people, so this flashing is caused by the idea that it makes the image difficult to see. do}
Of course, flashing is not prohibited for the auxiliary CRT 2 for the operator. Therefore, 026, from which the RGB signals to the external system and the NTSC signals via the color encoder 25 are output from the flash prohibition circuit 24, is an I/0 circuit connected to the above-mentioned CPU. A signal is supplied to the display control circuits 20 and 21 through a flash circuit 27 that flashes the area where the mesh is displayed, and a mesh circuit 28 that displays a mesh when instructed to do so in the mesh area D mentioned above. A lamp 29 is connected to the /0 circuit 26 via a lamp circuit 30, and is used to display various statuses.

31 is a switch provided on the operation surface, switch circuit 3
2, 33 is a CRT control circuit connected to the CPU, 34 is a RAM control circuit associated with this CRT control circuit 33 and the CPU, and 35 is a CR
A clock circuit 37 is associated with the T control circuit 33 and the synchronization separation circuit 36 that receives synchronization signals from an external circuit.
The main and auxiliary switching circuits are connected to the PU and control the selection operations of the selectors 18 and 19, and 38 is a ROM in which a program that controls the operation of the system is stored.Next, Figure 4 shows the indicated display. A part of the internal configuration of the control circuits 20 and 21 is shown, and in the figure, 40 is normal display information d.

, d, , d2, d3 latch circuit, 41, 4
2, 43 is this display information d. , d1, d2, and d3 are color registers corresponding to the three input primary colors of red, green, and blue, respectively, and are connected to D/A conversion circuits (not shown) corresponding to each color. 44 is the latch output and a change input m that is input when changing the gradation level.

, m1, m2, and m3, and is connected to the address terminals of each of the color registers 41, 42, and 43. 45 is a latch circuit 40 and a selector circuit 44
, and the operation of each color register 41, 42, 43.

Next, the color specification area A and the gradation control area B, which are the main parts of the present invention, will be explained.

As shown in the figure, the color designation area A has 16 color designation locations, and five locations, starting from the left end, are defined as fixed colors: gray and white of the CRT background color, and the three primary colors of red, green, and blue. The remaining 11 locations can be set arbitrarily. In addition, the gradation control area B is divided into scale locations BS1, BS2, and BS3 corresponding to the three primary colors of red, green, and blue, respectively, and a number that numerically displays the gradation corresponding to each scale location. Locations BN1, BN2, and BN3 are provided. Each scale location BS can display 16 gradations in a bar graph display for each color, and the numerical location BN can also be displayed in 16 gradations from O to F. For example, when all three primary colors are at the highest gradation, the entire area of all scale points BS1, BS2, and BS3 is displayed in each color, and all number points BN1, BN2, and BN3 are also all displayed in F, and The display color is the highest tone white. Furthermore, even if only red is displayed, it is possible to display from the darkest tone to the lightest red. To change the gradation for each color, by pointing the upper side of the scale point BS with the light pen 3, the gradation will increase according to the number of times the instruction is made, and by pointing the lower side, the gradation will increase according to the number of times the instruction is made. The gradation level decreases depending on the number of instructions. FIG. 5 shows an example of a configuration for achieving such a function, and for example, only red among the three primary colors will be described in detail.

The color video signals from the video RAMs 12 and 13 are
Fixed registers 51 and 52 into which 0, red, and gray fixed data are supplied to the color register 41 via the selector 50 are connected to the first selector 50 via the second selector 53. , and supplies red and gray color information as appropriate. 54 is a determination circuit for determining the scale BS instruction address corresponding to the red color of the gradation control area B by the light pen 3; when the light pen 3 indicates the upper color, it sends an up signal u; when it indicates the lower color, it sends a down signal d; Output each.

Reference numeral 55 denotes an up/down counter into which initial data is introduced, and its contents are incremented or subtracted one by one according to the up and down signals u and d from the determination circuit 54.

56 is a gate circuit that gates the gradation control area;
The read addresses 12 and 13 are introduced, and a signal for controlling the selection operation of the first selector 50 is output.

57 is a counter into which the lowest address in the direction of the red scale BS0Y of the gradation control area B is introduced and performs a counting operation based on the gate output of the gate circuit 56; 58 is the counter 5;
7 and the up-down counter 55, and the selection operation of the second selector 53 is controlled by the comparison output.

In addition, the count output of the up-down counter 55 and the up and down signals u, d<7) OR output of the judgment circuit 54 are directly supplied to the color register 41 to set the color display according to the occasion. The parts related to area D and the mesh circuit 28 will be explained.

By designating this mesh area D, the mesh at the pitch specified in advance by the instruction in the fixed point designation area J is displayed, and the mesh display color at this time is easy to distinguish from the display color at that location. Preferably. On the other hand, as mentioned above, the color of the color specification area A is determined arbitrarily, but it is convenient for use to arrange opposite colors on both sides. . Therefore, it is preferable that the mesh display color be the color of the symmetrical position, in order to make the mesh clear. FIG. 6 shows an example of an internal configuration for performing such mesh display. The video signals stored in the video RAMs 12 and 13 are supplied to the selector 61 both directly and via an inversion circuit 60 that inverts the display color to the color signal at the symmetrical position described above. 62
is a mesh register into which an address signal indicating the mesh position is introduced; the mesh address stored in this register 62 is supplied to a comparison circuit 63 which compares it with the read address of the video RAMs 12 and 13, and the comparison output is It controls the selection operation of the selector 61.

That is, when the read address matches the mesh address, the display is switched to the inverting circuit 60 and an inverted color display is performed. In addition, in the device of the present invention, partial image transfer is possible alternately between the main and auxiliary CRTs 1 and 2, and the light pen 3
This is carried out when the move area S is designated with .

In other words, as an operation, for example, the main CRT1
In the case of transferring the image to the auxiliary CRT 2, use the light pen 3 to indicate the part of the main CRT 1 that should be transferred, then indicate this move area S, and then indicate the destination of the image using the light pen 3. The image transfer is completed. FIG. 7 shows the internal configuration for performing this transfer operation. 70 is a register that indicates the location to be transferred;
The contents are video RA corresponding to each CRT1 and 2.
A comparison circuit 71 compares the address signals of M12 and M13, and a write/read control circuit 72 operates based on the comparison result, and a read/write signal R/W from the control circuit 72 is activated.
W is supplied to each of the video RAMs 12 and 13.

Also, based on the comparison result of the comparison circuit 71, the video RA
The configuration is such that the bus control circuit 73 for M12 and M13 is driven.Next, we will explain the operation related to the move super area T that can transfer only the necessary colors when transferring such an image, and its operation. I'll think about it.

Indicate the area to be transferred with the light pen 3, then instruct the move super area T, the color not to be transferred in the color specified area A, and finally specify the destination area of the transfer image with the light pen 3. Accordingly, image transfer of only the necessary colors is executed. FIG. 8 shows an example of an internal structure for executing such an operation. The figure shows an example of image transfer from the main CRT 1 to the auxiliary CRT 2. 80 is a color register into which colors not required to be transferred are input, and the video signals to the video RAMs 12 and 13 corresponding to each CRT 1 and 2 are input. A match with this color register 80 is detected by a match circuit 81, and an inhibit gate 82 is provided to inhibit the write signal WR to the video RAM 13 at the time when the match is detected. Next, timer areas W and X will be explained.

For example, the time required to move from one straight line writing to the next straight line writing is controlled by the instruction in the first timer area W by the light pen 3. O. 1
You can select from seconds up to 9.9 seconds. In the case of the second timer area You can do it by twisting it. Furthermore, when an instruction for coating area 0 is given, the operation of applying the figure searches for the upper end of the figure in the upper left and upper right directions from the specified location with the light pen 3, and starts applying the specified color from that location. .

Also, when a circle area 0 is specified to be filled in, the outer circumference of the circle is first drawn by specifying the center position and a position corresponding to the radius from the center position with the light pen 3, and the thickness is The inside of the circle is successively filled with lines of the thickness specified by the area C instruction. Also, when specifying a rectangular area Q to fill in the inside of a rectangle, by specifying the two diagonal vertices of the rectangle with the light pen 3, the outer circumference is first drawn, and then the inside of the rectangle is drawn downward. It is filled in sequentially from the sides or top. Note that this filling direction is also specified by the light pen 3, and selection of this filling direction may be effective when drawing a bar graph, for example. FIG. 9 further shows the internal configuration for executing the editing function of the apparatus of the present invention. This is a configuration for creating a data bank that collects a large number of reduced figures and characters on the auxiliary CRT 2 screen by reducing and transferring them to
The figure shows the figures and characters displayed on the main CRT1 screen as an auxiliary CR.
90 shows the case of transferring to the T2 screen and creating a data bank on the same screen, and 90 is the auxiliary CRT2 to be reduced and transferred.
An address determination circuit determines the address when the light pen 3 indicates a location on the screen, and an address generation circuit 91 generates a write address for the video RAM 13 corresponding to the auxiliary CRT 2 based on the determination in the circuit 90.

At the same time, this write address is also supplied to address conversion circuit 92. This address conversion circuit 92 is a video RAM.
Video RAM 1 of main CRT 1 corresponding to 13 addresses
2 representative addresses, and the RAM 12
supplying that address. This address conversion circuit 92 includes an X register 93 that provides X-direction pitch data of the CRT 1 screen to create a representative address, a Y register 94 that provides Y-direction pitch data, and an initial value register 95 that stores an initial value. are connected, and settings such as the reduction ratio in the X direction and Y direction are performed. }, the address generation circuit 91 sends a write signal WR to the video RAM 13, and a write signal WR to the video RAM 1.
As is clear from the above description, the present invention has a configuration in which the gradation can be controlled for each of the three primary colors of the display color, so that any color display can be performed. Not only is this possible, but the gradation can also be controlled digitally using a light pen. Therefore, the burden on the operator is small, and since the gradation status is displayed by area, the status can be known at a glance, and the versatility of this main image display device can be increased. Furthermore, the gradation control for each color in the apparatus of the present invention is configured such that the gradation is increased by specifying the lower side of the gradation display area, and decreased by specifying the lower side of the gradation display area. Adjustment control becomes extremely easy〇

[Brief explanation of the drawing]

FIG. 1 is a front view of the CRT screen, FIG. 2 is an enlarged front view of the instruction area of the CRT screen, FIG. 3 is a block diagram showing the internal configuration of the device of the present invention, and FIGS. 4, 5, and 6. , FIG. 7, FIG. 8, and FIG. 9 are detailed block diagrams of each part of the internal configuration of the apparatus of the present invention, in which 1 and 2 are CRTs, 3 is a light pen, 12 and 13 are video RAMs, 20, 21 is a display control circuit; 41, 42, 43 are color registers; 5
0 and 53 are selectors, 54 is a determination circuit, 55 and 57 are counters, 58 is a comparison circuit, 60 is an inversion circuit, 61 is a selector, 63 is a comparison circuit, 71 is a comparison circuit, 72 and 73 are control circuits, and 80 is a A color register, 81 a coincidence circuit, 90 an address judgment circuit, 91 an address generation circuit, and 92 an address conversion circuit are shown, respectively.

Claims (1)

[Claims] 1. An image display device equipped with a light pen in which information is written by pointing on a CRT screen,
The CRT screen has an image area where image information is output,
An instruction area for instructing display operations is divided,
The instruction area is provided with at least a color specification area for specifying a display color, and a gradation control area for controlling the gradation of the color specified in the color specification area. , the area corresponding to the gradation of each color corresponds to the three primary colors of red, green, and blue, and each of the three primary colors is displayed.
An image display device using a light pen, characterized in that the gradation of each primary color is controlled by instructions from the light pen. 2. The gradation control for each of the three primary colors is increased by indicating the upper side of the display area assigned to each of the three primary colors with the light pen, and is decreased by indicating the lower side. An image display device using a light pen according to claim 1.