JPS62253196A - Color display unit - 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 [Field of Industrial Application] The present invention relates to a color display device which is, for example, an output device of an electronic computer, and is limited in scope.

It is designed to be able to display a large number of colors, which is impossible due to the memory capacity.

[Prior Art] 1 () In recent years, the applications of computers called microcomputers, which are constructed from several large-scale integrated circuits, have been rapidly expanding. As a result, it is desired that the input/output device, which is a means of interaction between electronic meters and humans, has relevant functions and is easy to operate, and in particular, it is desirable to be able to perform processing in the form shown in Figure 15. Color display equipment is the key to this.

It is gradually becoming popular as it satisfies the above requirements. Power.

The color display device has a memory inside it, and once the information sent from the computer is stored in this memo.

After accumulating the information repeatedly, the accumulated information is read out repeatedly. .

and the table of cathode ray tubes, plasma displays, etc.

This is an output device that displays on the water device.

Information storage in a color display device is usually divided into picture elements that represent the information to be displayed, and each picture element is stored in one part of the memory.
Assign each bit to each bit and accumulate it. Therefore, it is a place to store and display black and white images.

In this case, a memory capacity equal to the number of picture elements is required. Power.

In the case of a color image, for example, there is a method shown in Japanese Patent Publication No. 51-48865. This method is for recording notes.

lt1 into regions corresponding to each color component.
A method of displaying a color by dividing the color information sent from the computer into each color component, storing it in each area of the memory, and composing each color component during playback. In general, when the memory is divided into N parts, the number of colors that can be displayed is limited to 2N (15 including white and black). Therefore, if you try to display a large number of colors, a large amount of memory capacity is required. .

It becomes expensive. On the other hand, less notes’ J W lid.

It is shown in Japanese Patent Application No. 52-5171 that can display a large number of colors.

The following methods are available. This method is double 2゜・
6. Record numerical color information in a plurality of registers, and store selection information for selecting the registers in memory for each pixel on the display screen, and determine the number of colors determined by the selection information stored in the memory. register.

is selected, and color information for each picture element is obtained from the five color information recorded in this selected register.

Below C, this method is used as register selection method.

). FIG. 2 is a block diagram of a color display device using a register selection method. In Fig. 2, 1 is a control section, 2 is a color display section 3. t.

4 is a connection line with the electronic computer (hereinafter abbreviated as interface), 5.6 is a terminal section, 7 is a buffer circuit, 8
1 is a memory, 9 is an address switching circuit (hereinafter referred to as an address switching circuit) for setting the information storage area of the memory 8, 10 is a synchronization circuit, and 11 is an address signal used when reading information stored in the memory 8. This is an address generation circuit that generates an address.

Also, 12A to 12D are cash registers.

13 is a color selection circuit, 14 is a buffer circuit, 15° is a decoder circuit for the color selection circuit 16, and 16 is a color selection circuit.

13 is a register selection circuit, 17 is a color synthesis circuit, 2°, 4° 18 is a deflection circuit, and 19 is a color cathode ray tube. .

Furthermore, FIG. 6 shows the color display shown in FIG.

1 is a configuration diagram showing the concept of a command word of an electronic computer for controlling a ray device, -16 bits per instruction.

This is a configuration example. +a+ in the same figure indicates a command for specifying coordinates (x, y) of the display screen on the cathode ray tube 19 and data to be recorded at those coordinates, and fh+ in the same figure indicates a color.

Indicates the specified command.

In FIG. 2, the memory 8 includes memory other than semiconductors such as core memory and disk memory, but in the following description, it is assumed that a semiconductor random access memory is used. Also, it is possible to use other display devices such as a plasma display for the display of the color display section 2, but only 13 primary colors (R-G@B) can be used.
A description will be given assuming that a drivable color graph 15 tube 19 is used.

Through the interface 3 connected to the terminal section 5.

Then, the signal corresponding to Fig. 3 (α) and this Ig signal are transmitted.

The a-p pulse indicating that the electron is being sent.

It was transmitted from the computer and connected to terminal B. ! ,
3 shows the signal corresponding to fbl in FIG. 3 and that this signal is transmitted through the 1 interface 4.

A stave pulse is transmitted from the computer.

Buffer circuit; +, t4 received the O-1 pulse.
Outputs a pulse signal at times. When the address switching circuit 95 receives a pulse signal from the buffer circuit 7, the address switching circuit 95 transfers the data transmitted from the computer as shown in FIG. Recorded in 8,
Also, when not receiving a pulse signal, address generation circuit 1
The decoder times the data stored in the memory 8 by read address signals from 1 to 10.

15. Incidentally, the same problem occurred in the synchronous circuit 10.

The period signal is displayed in color at the same time as the address generation circuit 11.

Since the signal is also supplied to the deflection circuit 1B of the section 2, the reading operation from the memory 8 and the deflection operation 1° by the deflection circuit 18 are synchronized.

On the other hand, when the registers 12, 4 to 12D receive the pulse signal from the buffer circuit 14, the pulse signal is transmitted from the computer.

The signal shown in FIG. 3 fbl is recorded. cash register.

Color designation A- shown in Fig. 2 fbl is applied to the stars 12A to 12D.
D.

The contents of each are recorded. The decoder 15 decodes the data extracted from the memory 8 and registers it.

The register selection circuit 16 selects a register corresponding to this decoded signal.

12, 4 to 12D and supplies the color information recorded in the selected register to the color synthesis circuit 17.The color synthesis circuit 17 synthesizes the supplied color information.

red and green for driving the color cathode ray tube 19.

Generates positive primary color signals.

In addition, there is a method called the window counter method which is different from the register selection method described above and which reduces the memory capacity.This method will be explained with reference to FIG. Fig. 4 is a perspective view of a color display device for the windscreen/evening type, where 20 is the color display device and 21 is the screen of a color CRT 15 tube. The characteristics of the counter method are information.

It is displayed only within this area, and is not displayed around it. .

In this method, information is displayed on the periphery of the screen 210.

The peripheral memory 211 focuses on the fact that there is almost no
・7・ is omitted and corresponds to the area excluding area 22.

No memory is required, and the memory capacity is slightly smaller.

Can be done easily.

[Problem that the invention seeks to solve]

However, this window counter method has the following two drawbacks. That is, 1) the periphery of the screen;

A boundary is generated in the region 22, and the peripheral portion becomes frame-shaped. 2).

screen depending on the performance of the color display device.

Causes distortion. 1) is easy to understand.

Therefore, 2) K will be explained in more detail. The power supply that applies voltage to the anode of the base cathode ray tube in a color cathode ray tube in a color display device has an internal resistance of several MΩ, so that when the beam current changes, the voltage at the anode also changes. Since this voltage is a voltage that accelerates the electron beam, if there is a 15 variation in the voltage, the position where the electron beam reaches 6 on the cathode ray tube surface will vary. If the beam current changes significantly and suddenly, the fluctuation in the reached position will be noticeable and will be shown on the screen.

The displayed image will be distorted. Wind Curran.

In the case of the evening ceremony, there is a frame-shaped peripheral area and an information display area 22, 2°, 8.

In this case, differences in brightness and color usually occur, and the beam current changes suddenly at the boundary, resulting in screen distortion. Especially when using a home television receiver as a color display device.

, the screen distortion becomes extremely noticeable.

An object of the present invention is to form a frame-like peripheral portion of a window counter type color display.

The purpose is to prevent this phenomenon and screen distortion. [Means for solving the problem] The above object is to rotate one of the color registers in a window counter type color display device.

Set it as a register that represents the color of the edge, and distinguish between the information display area of the display screen and the peripheral area.

A wind pulse generation circuit that generates a pulse, and a register selection circuit that switches between an address signal of a color register determined in accordance with display information and an address of a color register selected in response to the wind pulse.

Ideally, provide an address gate circuit to supply the

will be achieved.

[Effect]

The wind pulse generation circuit distinguishes between the information display area and the peripheral area on the display screen based on the synchronization signal.

generates a wind pulse and supplies it to the address gate circuit. Information is displayed on the address gate circuit.

During the area period, address information for selecting a color register corresponding to the color of each display unit is supplied from the memory. Information display area period from memory.

Is the address information as it is in the address gate circuit?

are supplied to the register selection circuit. In the periphery period.

is the peripheral part 1 (] determined corresponding to the wind pulse
The address information of the register storing the color of is supplied from the address gate circuit to the register selection circuit.

Therefore, by setting the register that stores the color of the peripheral area and the register that stores the background color of the information display area to 15-, it is possible to prevent screen distortion and chipping.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. .

FIG. 1 shows a color display device according to the present invention.

FIG. 5 is a 2° diagram of its waveform. In FIG. 5, (α) ~ idl and fgl ~ (
A+ is there.

Both are shown on the same time axis. With synchronous circuit 10.

The generated vertical synchronization signal and horizontal synchronization signal are sent to the deflection circuit 18.
and is supplied to the address generation circuit 11. No.

5 (α) and 5) show the horizontal synchronizing signal, and fat shows the vertical synchronizing signal. The address generation circuit 11 runs horizontally for one pixel.

Read address whose cycle is the time required to scan.

A circuit that generates a 1D pulse (below signal C).

, a horizontal counter for counting 1D pulses, and a vertical counter for counting the horizontal synchronization signal supplied from the synchronization circuit 10. The color counter is used to define one picture element within the information display area. For example, 1 horizontal counter bit and 4 vertical counter bits (4 scanning lines) are defined as one pixel. FIG. 5 1hI shows a 1D pulse. l) Address generation circuit 11
The output is supplied to the address switching circuit 9 and the wind pulse generation circuit 23. Two.

The Indian pulse generation circuit 23 receives the 1D pulse supplied from the address generation N path 11° from the horizontal synchronization signal.

Figure 5 (cl.
21T, 11.

and generates a horizontal wind pulse as shown in fA+.

do. Wind pulse has logic H in the information display area.

It is set in advance to correspond to (.

From the wind pulse generation circuit 23 through the signal line 27.

A window pulse is then supplied to the address gate circuit 25.

The address gate circuit 25 uses wind pulses as information.

When indicating the display area, the address signal from the memory 8 is directly output, and when indicating the peripheral area, it is the win signal.

Outputs the address information number determined according to the pulse
do.

In other words, the logic H, 1N, logic/fill of the wind pulse is made to correspond to 0', and the wind pulse is set to multiple numbers (
(Here, 2 bits), and converting the wind pulse to its mama code I5 for both the 1st and 2nd bits,
The address signal becomes 00'.

Hence the register that stores the color of the periphery.

For example, suppose register 12A and its address is 0°0
′, the wind pulse indicates the surrounding area.

In this case, register 12J is selected. register. ,
・12 ・If the addresses of 12B, 12(?, 12D are 10', ゛, 01', 11', respectively, and the address of the register that stores the color of the peripheral area is 10', then If only the first bit is logically inverted and coded, it becomes a register.

When the star 12B is selected and only the second bit is logically inverted and coded into 5, 01', 1st . Both the second bit.

If you invert the logic and encode it, it becomes 11', that is.

The corresponding register 2C212D is selected. .

The register selection circuit 16 receives this decoded signal.

Select the corresponding register from registers 2, 4 to 12D, and color the color information recorded in the 10 selected registers.

It is supplied to the synthesis circuit 17. The color synthesis circuit 17 synthesizes the supplied color information and generates red, green, and blue primary color signals for driving the color cathode ray tube 19. A selection signal is sent so that the brightness and color of the area excluding the information display area are the same as the background of the information display area.

If you code it, in the register selection circuit.

Color plow because the same register is selected.

When displayed on a computer screen, there will be no frame around the periphery of the screen, and the image displayed on the screen will not be distorted.

Incidentally, when the vertical wind pulse shown in FIG. 5 is logical, the selection signal is supplied to the decoder circuit 15 in the same way as when the horizontal wind pulse is logical.
5. As explained above, according to the present invention, coloring is possible.

the background of the information display area in the display device;

By making the brightness and color of the area (excluding the information display area at the periphery of the screen) the same, the window color can be improved.

The disadvantage of the color CRT system is the periphery of one surface of the color CRT.
This eliminates distortions in frames and images displayed on the screen, and allows a large number of colors to be displayed easily despite the small memory capacity. Furthermore, devices such as home color television receivers, in which the internal resistance of the power supply 15 for applying voltage to the anode of the color lamp tube is large, are equipped with a color display.

It can be used as a neck.

[Brief explanation of drawings]

FIG. 1 shows the actual color display device of the present invention. The block diagram shown in FIG. 2 is a conventional register. A step-by-step diagram of a color display device according to the selection method, FIG. 3 shows the concept of electronic #[calculator]. FIG. 4 is a perspective view of a conventional window counter type color display device, and FIG. 5 is a rectangular view of a color display device based on an undeveloped technology. 8...Memory 11 River address generation circuit ゛12.4ν12B, 12C', 1277...Register 16...Register selection circuit 17...Color synthesis circuit 15...Decoder circuit
1゜23...Wind pulse generation circuit 25...Address gate circuit 2nd section Figure 3 Figure 4 Figure 5 (A) Lf Ll Eye U

Claims (1)

[Claims] 1. Color synthesis means for synthesizing color signals according to color information for each display unit and outputting the color signals to a connected color display means; a plurality of registers storing color information; a memory storing address information for selecting the plurality of registers for each display unit of the information display area of the color display means; and address information supplied from the memory. register selection means for selecting a corresponding register from the plurality of registers according to the color information and outputting the stored color information; a window pulse generating means for generating a window pulse used as a peripheral register for storing color information of the peripheral part of the color display means and for switching between the information display area and the peripheral part of the color display means; is connected to the register selection means, and supplies the address information supplied from the memory to the register selection means during the information display area display period in response to the window pulse, and supplies the address information supplied from the memory to the register selection means during the information display area display period, and corresponds to the window pulse during the peripheral area display period. 2. A color display device comprising: address gate means for supplying address information of said peripheral register determined by said register selection means to said register selection means. 2. The color display device according to claim 1, wherein the address of the register for storing color information of the peripheral area is set to a value that is a coded value of a wind pulse. 3. In claim 2, the address gate means receives the window pulse, branches the window pulse into a plurality of bits, and applies a predetermined logic to the signal of each branched bit. A color display device characterized by comprising means for generating an address of a register for storing color information of the peripheral area by performing an arithmetic operation.