JPS61167988A - Graphic 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 graphic display device capable of moving any registered graphic formed in units of dots. Mainly used for educational television images.

〔overview〕

The present invention is an apparatus for moving and displaying a registered figure at a position arbitrarily specified by an operator, superimposed on a graph figure displayed on a screen, in which the graph figure and the registered figure are stored in separate memories, and the position is displayed. There is a system that reduces the burden on the computer and enables high-speed display by superimposing and displaying these two figures according to the register.

[Conventional technology]

Conventionally, for example, a graph shape circle is displayed on the display device shown in FIG. A desired screen can be displayed by reading out the image, combining it with the registered figure black arrow, and writing it into the memory 15 on a one-to-one basis. With this configuration, in order to move a registered graphic according to an instruction from an external device, it is necessary to perform the following series of processes on the display memory.

■ Registered figure currently drawn on the display device (black arrow)
(Restores the shape that was saved the last time you tried to draw a registered shape.)

■ Move the currently drawn figure to the position to be drawn next.

■ Combine the currently drawn figure and the registered figure and return it to the display memory.

This process is generally achieved by a program, but
This process requires a considerable amount of processing time.

[Problem that the invention seeks to solve]

Therefore, if you try to move registered shapes frequently,
It is necessary to allocate 40 to 70% of the microprocessor's processing power to this, which has the disadvantage of slowing down other processes.

The present invention solves this drawback, and aims to provide a graphical display device that can display images at high speed while reducing the burden on the processor.

[Means for solving problems]

The present invention includes a microprocessor, a memory connected to the microprocessor, a display device connected to the memory and the microprocessor for displaying graphics, and a pointing device connected to the microprocessor and operated by an operator. In the graphic display device, the microprocessor includes means for displaying a registered graphic read from the memory at a position designated by the pointing device, superimposed on a graph graphic read from the memory, the memory comprising: A first memory for storing the graph figure and a second memory for storing the registered figure are separately provided, and a register for temporarily storing a display device of the registered figure specified by the pointing device; circuit means for processing the information read from the memory according to the contents of the register; and circuit means for synthesizing the output information of the circuit means and the information read from the first memory and providing the synthesized information to the display device. It is characterized by having the following.

[For production]

When displaying a figure such as a graph and a registered figure such as a cursor that can be arbitrarily moved by an operator, a memory for storing the graph figure and a memory for storing the registered figure are provided separately, and the registered figure is displayed. Add a register for storing the position, read the figure from the memory for storing the figure, read the registered figure from the memory for storing the registered figure, and according to the value of the register for storing the position to display,
By displaying at a designated position, any registered figure can be moved and displayed at high speed without reducing the processing capacity of the microprocessor.

〔Example〕

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

FIG. 1 is a block diagram of an embodiment of the present invention. A microprocessor 11 and a pointing device 12 for manually moving the display position of a registered figure (displayed with a black arrow) are connected to the display device 5 via a display processing circuit including a memory group.

Here, the present invention is characterized by a graph figure memory 1 and a registered figure memory 7 that separately store graph figures (displayed as circles) and registered figures, and a registered figure specified by the pointing device 12. a display position storage register 10 that temporarily stores the display position of the
A synchronization signal that synchronizes the continuous output circuit 8 that controls the display position of information from the registered graphic memory 7 according to the contents of the display position storage register 10, and the continuous output circuit 2 that reads information from the continuous output circuit 8 and the graph graphic memory 1. TV signal conversion circuits 3 and 9 that convert the outputs of the generation circuit 6 and the two sets of readout circuits 2 and 8 into screen display signals;
and a synthesis circuit 4 for synthesizing these.

An arbitrary pattern is written in the registered figure memory 7 in advance by the microcomputer 11. In this embodiment, this is a pattern of black arrows.

The microprocessor 11 writes a graphic desired to be displayed on the display device into the graph graphic memory 1. Next, the successive output circuit 2 reads graphic data from the memory 1 in synchronization with the signals sequentially sent from the synchronization signal generation circuit 6, and the read data is converted into a TV signal by the TV signal conversion circuit 3. The converted TV signal passes through the synthesis circuit 4 and is sent to the display device 5.
displayed above.

Next, when the pointing device 12 is operated to move the position of the registered figure, the displacement of the movement (ΔX, Δy)
is notified to the microprocessor 11. Based on the displacement, the microprocessor 11 calculates the display position on the display device and sets it in the display position storage register 10. The succession circuit 8 sequentially reads out previously registered patterns from the registered figure memo IJ7. The timing of reading is performed from the time when the timing transmitted from the synchronization signal generation circuit 6 and the contents of the display position storage register IO match.

The read data is sent to the TV by the TV signal conversion circuit 9.
The signals are converted into signals, synthesized by the synthesis circuit 4, and combined with the graph figure on the display device 5 to display the registered figure.

As explained above, when the pointing device is operated to move a registered figure, the microprocessor 11 only calculates the display position address each time and sets the value in the display position storage register. , only a small proportion of the total processing power of the microprocessor 11 is required.

Color display can be easily achieved by having three sides of memory.

〔Effect of the invention〕

By implementing the present invention, the display position of a registered figure can be moved at high speed, and at the same time, the processing time used by the microprocessor for display processing can be significantly reduced.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention. FIG. 2 is an explanatory diagram of the operation in the conventional device. 1... Graph figure memory, 2.8... Successive circuit, 3
．． 9...TV signal conversion circuit, 4...Composition circuit, 5.
...Display device, 6...Synchronization signal generation circuit, 7...Registered figure memory, 10...Display position storage register, 11
... Microprocessor, 12 ... Pointing device, 15 ... Memory, 16 ... Display processing circuit. Block configuration diagram of the present invention M 1 circle

Claims (1)

[Claims] (1) A microprocessor, a memory connected to the microprocessor, a display device connected to the memory and the microprocessor to display graphics, and a pointing device connected to the microprocessor and operated by an operator. wherein the microprocessor includes means for displaying a registered figure read from the memory at a position specified by the pointing device, superimposed on a graph figure read from the memory; A first memory for storing graph figures and a second memory for storing the registered figures are separately provided, a register for temporarily storing the display position of the registered figure specified by the pointing device, and a register for temporarily storing the display position of the registered figure specified by the pointing device; circuit means for processing the information read from the memory according to the contents of the register; and circuit means for synthesizing the output information of the circuit means and the information read from the first memory and providing the synthesized information to the display device. A graphic display device comprising: