JPS5879285A - Program controlled vertical amplitude regulation system - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a program-controlled vertical amplitude adjustment method, and particularly to an 0RT (cathoderay t) using a star scan method that displays characters, kanji, figures, etc.
The present invention relates to a program-controlled vertical amplitude adjustment method in which the vertical dot spacing in a (Cathode Ray Tube) display device can be changed by program control.

Conventionally, in raster scan CRT display devices that display characters, kanji, figures, etc. in a dot configuration, a vertical amplitude adjustment method for controlling the dot spacing in the vertical direction has already been known, and this type of device Fig. 1 is a front view showing the screen of a conventional ORT display device, Fig. 2 is an enlarged view of the dot configuration of the screen, and Fig. 3 is a vertical view of the OR, T display device in Fig. 1. FIG. 2 is a block configuration diagram showing an amplitude adjustment method. 1 clearly shown in Figure 1 above is ORT
On the screen, 2 is the raster on the first line on the CRT screen l, 3 is the raster on the second line, and 01 (The display on the T screen l is expressed by these countless rasters. Also,
In FIG. 2, 4 is raster 2 on the first line of CRT screen 1.
5 is also a dot in raster 3 on the second row,
6 is the dot interval in the horizontal direction, and 7 is the dot interval in the vertical direction.

In FIG. 3, 14 is a vertical synchronizing signal for the CRT display device, 8 is a vertical launch circuit, 13 is a vertical amplitude adjustment variable resistor, 9 is a vertical amplification circuit, 10 is a vertical output circuit, and 11 is vertical edge/gender compensation. 12 is a vertical deflection signal, and 15 is a vertical brushing signal.

In the block diagram of the conventional example shown in FIG. 3 as described above, the vertical oscillation circuit 8 is controlled by the vertical synchronizing signal 14 and generates a sawtooth wave having the frequency number of the vertical synchronizing signal 14. The amplitude of this sawtooth wave is appropriately adjusted by a vertical amplitude adjustment variable resistor 13, and is sent to a vertical amplifier circuit 9, amplified, and then supplied to a vertical output circuit 10. The output from the vertical output circuit 1O drives a vertical deflection coil 12 that deflects the electron beam in the vertical direction, and the vertical blacking signal 15 from the vertical output circuit 10 causes the electron beam to move from the end point of the ORT screen 1 to the starting point. In addition, the vertical linearity compensation circuit 11 performs control to maintain the linearity of the deflection current that drives the vertical deflection coil 12.

Here, what determines the dot spacing 7 in the vertical direction shown in FIG. It can be arbitrarily controlled by appropriately adjusting the flowing current.

Since the conventional vertical amplitude adjustment method shown in FIG. 3 has the above-mentioned configuration, if you want to change the dot spacing in the vertical direction, you have to manually adjust it each time, and it is difficult to change it quickly. is almost always difficult. Also, when displaying characters and kanji, by making the vertical dot spacing longer than the horizontal dot spacing, the font can be displayed beautifully as a vertically long font, but on the other hand,
When displaying a figure, it is necessary to display the figure accurately because it is impossible to equalize the dot spacing in the horizontal direction and the dot interval in the vertical direction, which are required to display the figure accurately and clearly. There were drawbacks such as the inability to

The present invention was invented in order to eliminate the above-mentioned drawbacks, and it is a raster scan method (3RT display device) that displays characters, kanji, figures, etc. in a dot configuration, in which the dot spacing in the vertical direction is controlled. It has a configuration in which a processor or the like outputs a vertical amplitude control signal to change the vertical amplitude control signal by program control, and when displaying characters, kanji, figures, etc. on a CRT screen, It is an object of the present invention to provide a program-controlled vertical amplitude adjustment method that can change the dot spacing in the vertical direction to an optimal vertical dot interval according to a display object.

Hereinafter, the present invention will be explained in detail by way of examples based on the drawings. FIG. 4 shows the program-controlled vertical amplitude adjustment force of a CRT display device according to an embodiment of the present invention.

3 is a block configuration diagram showing a formula, in which parts equivalent to those in FIG. 3 are indicated using the same reference numerals, and detailed explanation thereof will be omitted. In the block diagram shown in FIG. 4, 17 is a vertical amplitude control signal outputted from a processor (not shown), etc., 16 is a latch circuit for holding the vertical amplitude control signal 17, and 18 is a latch circuit 16. This is a vertical amplitude adjustment transistor connected between the vertical amplitude adjustment variable resistor 13 and one end of the vertical amplitude adjustment variable resistor 13, and the other components have the same configuration as the conventional block configuration shown in FIG. 3 described above.

Now, in the block diagram shown in FIG. 4 which is an embodiment of the present invention, the vertical oscillation circuit 8 is controlled by the vertical synchronizing signal 14 and generates a sawtooth wave having the same frequency as the vertical synchronizing signal 14. . By appropriately adjusting the vertical amplitude adjustment variable resistor 13, a part of the current flowing therethrough is shunted to the vertical amplitude adjustment transistor 18 and supplied to the vertical oscillation circuit 8. The amplitude of the Nigiri wave is controlled. Vertical amplifier circuit 9
When this sawtooth wave is amplified and then supplied to the vertical output circuit 10, the vertical output circuit 10' uses its output to drive the vertical deflection coil 12 that controls the vertical deflection of the electron beam. The vertical blacking signal 15 from 1 performs non-display control while the electron beam returns from the end point to the start point of the ORT screen l. Furthermore, the vertical linearity compensation circuit 11 performs one control to maintain the linearity of the deflection current that drives the vertical deflection coil 12. Here, in order to determine and control the vertical dot spacing 7 shown in FIG. It is held by circuit 16. When the value held by this latch circuit 16 becomes a value that turns on the vertical amplitude adjustment transistor 18, a part of the current flowing through the vertical amplitude adjustment variable resistor 13 is shunted to the vertical amplitude adjustment transistor 18. On the other hand, if the value held in the latch circuit 16 turns off the vertical amplitude adjustment transistor 18, the vertical amplitude adjustment variable resistor 13 is turned off. The flowing current is vertical amplitude adjustment transistor 1
Since the dots are no longer diverted to the dots 8, the vertical dot spacing 7 increases. Therefore, the vertical dot spacing 7 in the dot configuration for displaying characters, kanji, figures, etc. on the screen of the CRT display device is changed under program control using the vertical amplitude control signal 17 output from a processor or the like. Therefore, characters, kanji, figures, etc. can always be ORed accurately and clearly depending on the display target.
Note that in the above embodiment, the vertical amplitude adjustment transistor 18 controlled by the value held in the latch circuit 16 was used, but in addition to this, relay elements etc. An element whose OFF can be controlled may be used. Further, in the above embodiment, the vertical amplitude adjustment means is added to the vertical rooting circuit 8 for control, but it may be added to the vertical amplifier circuit 9 or the vertical output circuit 10 for control. Deflection coil 12
A system may also be used in which the current flowing in addition to the current is shunted, and either method can achieve the same purpose as the above embodiment.

As described above in detail, according to the program-controlled vertical amplitude adjustment method according to the present invention, a program that controls the vertical amplitude adjustment means in a CRT display device that displays characters, kanji, figures, etc. in a dot configuration using a processor or the like. Since this is configured using a control method, when displaying a character or kanji, it is controlled so that the character or kanji is displayed in a beautifully balanced font, and when a figure is displayed, this figure is This has an extremely excellent effect in that it can be controlled by appropriately switching so that it is clearly displayed in an accurate shape.

[Brief explanation of drawings]

FIG. 1 is a front view showing the screen of a conventional CRT display device;
FIG. 2 is an enlarged view of the dot configuration of the screen, FIG. 3 is a program configuration diagram showing the vertical amplitude adjustment method of the ORT display device in FIG. 1, and FIG. 4 is an embodiment of the present invention. FIG. 2 is a block configuration diagram showing a program-controlled vertical amplitude adjustment method for an example CRT display device. l...,, -, ORT screen, 6---Horizontal dot spacing, 7---Vertical dot spacing, 8
- Vertical oscillation circuit, 9 - Vertical amplifier circuit, 1
0--1 vertical output circuit, 11-1 vertical linearity compensation circuit,
12--vertical deflection coil, 13--vertical amplitude adjustment variable resistor, 16--latch circuit, 18--vertical amplifier circuit transistor. In the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] A raster image that displays characters, kanji, or figures in a dot configuration.
A scanning type ORT display device, characterized in that it has a configuration in which a vertical amplitude control signal for controlling the dot spacing in the vertical direction is outputted from a processor, etc., and the vertical amplitude control signal can be changed by program control. Program controlled vertical amplitude adjustment method.