JPH02287615A - Graphic display device - Google Patents

Abstract

PURPOSE:To make the screen easily visible by erasing automatically a cursor which is being displayed, when a set time elapses after an instruction input using a coordinate input device is stopped. CONSTITUTION:When a user releases a stylus pen 11b from a tablet 11a, it is detected by a tablet control part 11c and transmission of coordinate data is stopped. As a result, a fundamental control part 19 starts a time monitoring mechanism 19a, and the mechanism 19a monitors only a cross-hair cursor erasion time T which is set at the time of set-up. In this state, when time-out of the mechanism 19a is generated, a cross-hair cursor erasing mechanism 19b is started, and the mechanism 19b generates erasion data for erasing a displayed cross-hair cursor and sends it to a display control part 16. As a result, the cross-hair cursor displayed on a graphic CRT 15 is erased by the erasion data, by which the screen becomes easily visible.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a graphic display device equipped with a coordinate input device, and more particularly to a display control method for a position pointing cursor.

(Prior art) C A D (Computer Aided Des
A graphic display device applied to a system that handles figures, drawings, etc., such as a ign) system, is provided with a coordinate input device used by a user to specify and input a coordinate position. This coordinate input device includes a tablet (coordinate input board), a stylus pen which is a position indicator for indicating (pointing) an arbitrary position on the tablet, and detects the contact coordinate position of the stylus pen on the tablet. It is generally configured with a tablet control unit.

In a conventional graphic display device having this type of coordinate input device, when a user touches the tip of a stylus pen on a tablet, the touch coordinate position is detected by the tablet control unit.

When the tablet control section detects the coordinate position indicated by the stylus pen, the tablet control section sends the coordinates to the basic control section that controls the entire graphic display device. Thereby, the basic control section displays a position indicating cursor, for example, a crosshair cursor, at a position on a graphic CRT (display monitor) corresponding to the coordinates sent from the tablet control section.

This crosshair cursor remains displayed on the graphics CRT even when the user removes the stylus from the tablet.

(Problems to be Solved by the Invention) As described above, in conventional graphic display I/I devices, a crosshair cursor is displayed at a corresponding position on a display monitor by specifying a coordinate position on a tablet using a stylus pen. remains visible even after you remove the stylus from the tablet.
In drawings that require detailed display, such as printed circuit board pattern drawings and mechanical drawings, the drawing lines and the crosshair cursor remaining on the display monitor overlap, making it difficult to see the drawing when checking the displayed drawing, and making it difficult for the eyes to see. The problem was that it was tiring.

Therefore, the problem to be solved by this invention is that the position pointing cursor displayed at the corresponding position on the display monitor in response to the user's position specifying input operation using the coordinate input device is automatically moved after a certain period of time after the user stops the same operation. The purpose of the present invention is to enable the screen to be easily erased, thereby making it easier to view the screen.

[Structure of the Invention (Means for Solving the Problem) The present invention provides a graphic display device in which a position indicating cursor is displayed at a screen position of a display monitor corresponding to coordinates input from a coordinate input device. , a time monitoring means that is activated when the coordinate input from the coordinate input device stops and monitors a preset time, and a position displayed on the display monitor when the time monitoring ends by the time monitoring means. The present invention is characterized in that it includes a cursor erasing means for erasing the pointing cursor.

The present invention is further characterized in that it includes time setting means for setting the monitoring time of the monitoring means.

(Operation) According to the above configuration, when instruction input using the coordinate input device is started (for example, when the stylus pen comes into contact with the tablet), the position instruction cursor (crosshair cursor) is placed at the corresponding position on the display monitor. ) will now be displayed. Thereafter, when the tb basic input is stopped using the rM input fold (for example, when the stylus is removed from the tablet), time monitoring is performed by the time monitoring mechanism.

Then, when the preset time has elapsed and the time monitoring by the time monitoring means ends, the cursor erasing means is activated and the position pointing cursor being displayed is erased. That is, according to the present invention, the displayed cursor is automatically erased when a set time has elapsed after instruction input using the coordinate input device is stopped, so the screen size is reduced compared to the conventional example in which the cursor remains forever. becomes easier to see. Further, by providing the time setting means, it is convenient because the time until the cursor is erased can be arbitrarily set according to the user's preference.

(Embodiment) FIG. 1 shows a block configuration of a graphic display device according to an embodiment of the present invention, and 11 is a coordinate input unit for inputting coordinates specified by a user. The coordinate input unit 11 inputs the tablet 1.1.1 to which the coordinate position is indicated. a, a stylus pen 1.1b for indicating (pointing) the sharpness of the position on the tab 11a, and the stylus pen 11b is connected to the tablet hlla.
It has a tablet control unit 11c that detects contact with the tablet and detects the coordinate position of the contact. The tablet control unit lie sends the detected coordinates to the human power processing unit 12 during the above-mentioned contact detection period. This human power processing section 12 is configured to perform manual processing by inputting coordinate data from the tablet control section 11c and sending it to a basic control section 19, which will be described later.

Reference numeral 13 represents a keyboard having various character keys, function keys, etc., and reference numeral 14 represents a keyboard control unit that controls the keyboard 13 and inputs key data and the like. 15 is a display monitor used to display drawings, figures, etc., such as a graphic CRT; 1B is a display control unit that controls the display of drawings, figures, etc. on the graphic CRTI 5; 17 is a control unit for the basic control unit 19; This is a graphic control unit that generates graphic data and sends it to the display control unit 16. 18 is an interface control unit that transfers data with the host computer; 19 is a basic control unit that controls all control units in the device, including the interface control unit 18;

The basic control unit 19 performs SET UP when the coordinate data from the input processing unit 12 is not available.
a time monitoring mechanism (time monitoring routine) 19a that monitors the cross removal time T set at the time;
A built-in crosshair cursor erasing mechanism 19b controls erasing of the hair cursor on the graphic CRT 15 in response to occurrence of a timeout in the time monitoring mechanism 19a.

Next, the operation of the configuration shown in FIG. 1 will be explained.

First, when a user uses the graphic display device shown in FIG. 1 for the first time, he or she operates the keyboard 13 to specify a method of controlling the scroll to the cross using the setup function. At this time, a red crane erasure time T is set for the cross. The information set by the user's operation of the keyboard 13 is sent to the basic control unit 1 via the keyboard control unit 14.
9 and stored in the basic control unit 19. In addition,
If the above setting operation is not performed, the crosshair cursor erasing time T becomes the default value.

Now, when the user moves the stylus pen llb,
When the pen tip is brought into contact with a desired coordinate position on the tablet lla, this is detected by the tablet control unit 11c. When the tablet control unit 11c detects contact between the stylus pen llb and the tablet lla, it detects the coordinate position of the contact. Then, the tablet control section 11c sends coordinate data indicating the detected coordinate position to the basic control section 19 via the input processing section 12 during the above-mentioned contact detection period.

Based on the coordinate data sent from the tablet control unit lie via the input processing unit 12, the basic control unit 19 generates a graphic CR corresponding to the coordinate position indicated by this coordinate data.
Cross crane display data for displaying the cross crane at the screen position T15 is generated and sent to the display control section 16. As a result, under the control of the display control section 1B,
The user uses the stylus pen to touch the tablet
Graphic CRT corresponding to the coordinate position indicated on a
A red crane is displayed on the cross at screen position 15.

In the above state, when the user releases the stylus pen flb from the tablet lla, a notification to that effect is sent to the tablet control unit 11.
detected at c. When the tablet control unit lie detects that the stylus pen llb has left the tablet 11a, it stops transmitting the coordinate data described above.

When the coordinate data transmission from the tablet control section 11c stops, the basic control section 19 starts up the built-in time monitoring mechanism 19a. As a result, the time monitoring mechanism 19a monitors for the cross removal time T set at the time of setup (default value if no setting operation is performed). When a timeout occurs in the time monitoring mechanism 19a, the cross-curse erasing mechanism 19b is activated. As a result, the cross cursor crane erasing machine 19b generates cross cursor crane erasing data for erasing the currently displayed cross cursor crane, and the display control unit 1
Send to B. As a result, (the user's stylus pen
(according to the coordinate position instruction operation using) graphic CR
The crosshair cursor displayed at T15 is erased under the control of the display control section 1B in accordance with the erasure data of the crosshair cursor erasure mechanism 19b (in the basic control section 19). After this erasing, when the user operates the stylus pen llb again and touches it on the tablet lla, in the same way as in the above case, a cross is drawn on the screen position of the graphic CRT 15 corresponding to the touch position. is displayed.

In the above embodiment, a case has been described in which the setup function of the device is used to set the cursor erasing time, but the setting can also be done using a hardware switch, an external switch, or the like.

[Effects of the Invention] As detailed above, according to the present invention, the position indication cursor displayed at the corresponding position on the display monitor in response to the position specification input operation by the user using the coordinate input device is Since it is automatically deleted after a preset time has elapsed since the input operation was stopped, the drawing becomes easier to see when, for example, the user wants to check the detailed drawing being displayed, and the user's eyes do not get tired.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a graphic display device according to an embodiment of the present invention. 11... Coordinate input section (the seat is an input device), lla...
・Tablet, Ilb... Stylus pen, 11c・
...Tablet control unit, 13...Keyboard, 15.
・Graphic CRT (display monitor), 19...
Basic control unit, 19a... Time monitoring mechanism, 19b...
Crosshair cursor erasure mechanism. Applicant's agent Patent attorney Takehiko Suzue

Claims (2)

[Claims] (1) In a graphic display device in which a position indicating cursor is displayed at a corresponding screen position on a display monitor in response to coordinate input from a coordinate input device, it is activated when coordinate input from the coordinate input device stops, and is activated in advance. The present invention is characterized by comprising: a time monitoring means for monitoring a set time; and a cursor erasing means for erasing the position pointing cursor displayed on the display monitor in response to the end of time monitoring by the time monitoring means. graphic display device. (2) The graphic display device according to claim 1, further comprising time setting means for setting the monitoring time of said monitoring means.