JPS6334470B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a graphic input device that inputs a graphic using a display screen.

[Technical background of the invention and its problems]

In so-called graphic input devices that create graphics using a dot-compatible display device and a keyboard, a cursor is used to specify the display position of the graphics or characters. That is, the operator specifies the position by moving the cursor up, down, left and right. At this time, the operator performs positioning while looking at the display screen, but it is generally difficult to visually distinguish the dot-by-dot display. Therefore, for example, when drawing a line vertically from point A on the horizontal line on the screen, the cursor is moved to point A to perform alignment, but at this time, the cursor may shift vertically. In addition, since the operator is required to track the cursor position on the screen with his or her eyes for accurate positioning, there are drawbacks such as strain on the eyes and easy fatigue.

[Purpose of the invention]

This invention was made in view of the above circumstances, and it compares the display state before and after the cursor movement, and if a difference is detected, the operator is notified by displaying a specific mark on the screen or by using a buzzer, etc. An object of the present invention is to provide a graphic input device that facilitates position alignment.

[Summary of the invention]

The present invention compares the display state of the cursor setting position before and after moving the cursor, and detects the difference (for example, in the case of monochrome, ON←→OFF, in the case of color, the color changes), and displays a specific mark or sounds a buzzer. It alerts the operator by making a sound.

This allows the operator to know the alignment of the display position using other senses, making alignment easier.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a graphic input device according to the present invention.

In the figure, 1 is the CPU. The CPU 1 controls the entire device based on programs and data stored in the main memory 2. the above
CPU 1 and main memory 2 are connected via bus 5. 3 is a keyboard unit. The keyboard unit 3 uses function keys and data keys to input data into the apparatus, and also uses cursor keys to specify input positions. The keyboard unit 3 is connected to the path 5 via a keyboard control device 4. 6 is a cursor register. The display position of the cursor operated by the keyboard unit 3 is recognized by the CPU 1, and the cursor position data is set in the register 6. The display driving device 7 displays a cursor on the CRT display 8 based on the contents of the register 6. 9 is a CRT control device.
The CRT control device 9 generates various timing signals necessary for display. 10 is a refresh memory. The refresh memory 10 has a capacity of one screen, and data to be displayed (graphics or characters) is stored in dot correspondence. This refresh memory 10 is connected to a path 5 via a memory control device 11. 12 is a parallel/serial converter (shift register). The parallel-to-serial conversion circuit 12 converts the parallel dot signal obtained from the refresh memory 10 into a serial dot signal, and converts it into a serial dot signal as a video signal.
Supply to CRT display 8. Above 6, 7,
9 and 11 are usually built into one CRT display control LSI and are commercially available.

The operation of this configuration will be explained. Assume that the user instructs the movement of a cursor already displayed on the screen of the CRT display 8 by operating the keyboard unit 3. As a result, the keyboard control device 4
transfers the cursor display position to CPU1.
The CPU 1 operates according to a program stored in the main memory 2 in advance. In other words, as shown in the flowchart in Figure 2, first the CPU
1 is the display state of the cursor position before movement (currently) from the refresh memory 10 (temporarily set as D ₁ )
(Step _S1 ). Here, the display state is
For example, it shows the state of the color displayed in dot units on the screen of the CRT display 8, whether it is on, off (monochrome), or in a color display state. Further, in response to a movement instruction obtained via the keyboard control device 4, a new movement position of the cursor is set in the register 6, and the display state after the cursor movement (temporarily assumed to be _D2 ) is written into the refresh memory 10. And CPU1 is refresh memory 1
The display state _D2 of the cursor position after moving from 0 is read (step _S2 ). This display state _D2 is compared with the display state _D1 before the movement described above (step _S3 ). If this comparison result does not match, the CPU
1 outputs a control signal for displaying a special display mark on the screen of the CRT display 8 or operating a buzzer (step S ₄ ). Also,
If the display states D ₁ and D ₂ match as a result of the comparison again, a control signal for erasing the above-mentioned special display mark or stopping the buzzer is output (step S ₅ ). Then, the contents of register 6 are changed to the contents of the cursor after the movement, and the contents are actually
The moved cursor will be displayed on the CRT display 8 screen.

Specifically, it is assumed that there are nine display pixels as shown in FIG. 3, and the cursor is located at the center 31. Assume now that the upper and lower parts of the cursor are in the same display state as the cursor, and the other parts are in different display states. In this case, when the cursor moves above or below the current position 31 according to the above movement instruction, the steps shown in FIG.
The process of _S5 is performed. If the cursor is moved to another position, the process of step _S4 shown in FIG. 2 will be performed.

In the embodiment of the present invention, a keyboard cursor is used as a means for inputting a position on a CRT display screen, but any other means for inputting a position on a screen, such as a mouse or a joystick, may be used. In addition, the display state can be determined by determining the dot on a monochrome display as shown in the embodiment of the present invention.
ON/OFF and color displays can be realized by combining the bit configurations of each primary color.

〔Effect of the invention〕

As described in detail above, according to the present invention, if a shift is detected during cursor alignment, the user is notified by a special display mark or a buzzer, so that the user can easily reset the cursor. Therefore, the user can accurately and easily display figures and the like on the screen. Moreover, when tracking the cursor position, the operator can know the shift using other senses, which reduces the burden on the operator and has the effect of significantly reducing eye fatigue.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a graphic input device according to an embodiment of the present invention, FIG. 2 is a flowchart for explaining its operation, and FIG. 3 is a display state diagram for explaining its operation. It is a figure showing an example. 1...CPU, 3...Keyboard, 8...CRT
Display, 10... Refresh memory.

Claims (1)

[Claims] 1 Comparison of the means for displaying the reference position on the screen, the means for instructing the movement of this reference position, the means for changing the reference position according to the movement instruction by this means, and the display state before and after the movement of the reference position. A graphic input device comprising: means for generating a signal based on the comparison result; and means for notifying an operator based on the signal generated by the means.