JPS60179792A - 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 the Invention The present invention relates to graphic display devices, and more particularly to graphic display devices for displaying image information.

BACKGROUND TECHNOLOGY Graphic display devices that display images of characters, figures, etc. (IN information) on a display are well known, and conversational graphic processing is performed in the graphic display device.Conversational graphic processing is performed. When selecting a desired figure from the figures on the display using a figure indicator such as a light pen or tablet, then modify the indicated figure or create a new one using the indicated figure. I was creating shapes.

When performing such interactive figure processing, when a desired figure is indicated by a figure indicator, it is necessary to make the operator aware that the desired figure has been selected and instructed. Conventionally, the following graphic display devices have been proposed.

First, some conventional graphic display devices display a selection mark added to the desired figure on the display when a desired figure is designated on the display. however,
Such conventional devices have the following problems. In other words, if you select a shape that you are not happy with, you will need to issue a cancel command and then issue the shape instruction again, but the newly displayed mark on the display is actually the internal one. Since the erroneous selection mark is written to the graphics memory, it is not possible to immediately erase the erroneous selection mark, and the erroneous selection mark remains in its original form on the display. For this reason, if such an erroneous display is repeatedly performed together with other operations, the screen of the display device becomes garbled, which further causes erroneous operations. Also, to erase the displayed marks, etc.,
Although it is possible to completely rewrite the screen again, there is a problem in that the time required for this complete rewriting is long, resulting in a decrease in responsiveness in side story type graphic processing.

Furthermore, as another conventional graphic display device, there is one that displays a selection completion message on the display when a desired figure is designated on the display. However, 4
If only the selection completion message is displayed, the operator cannot recognize which figure has been selected, which causes a problem of erroneous operation.

Purpose of the Invention The present invention has been made in view of the above-mentioned conventional problems.The purpose of the present invention is to provide a graphic that can easily recognize an image indicated on a display and has improved operability and responsiveness. There is a need to provide a display device.

Structure of the Invention The graphic display device of the present invention includes a graphic memory that stores image information, a display that displays the image, an image indicator that indicates a desired image on the display, and an image indicator that indicates the image. an area extraction circuit that extracts an area surrounding the image based on hindlimb image information that has found image information that matches the image; a determination circuit that determines whether or not the
and a pre-king control circuit that pre-keeps the pixel at the read-out position when the read-out position is within the area based on a judgment signal from the judgment circuit, and in the area surrounding the designated image, the display is pre-k , is characterized by being

Example Hereinafter, the present invention will be described in detail based on Figure ml.

FIG. 1 shows a block circuit of a graphic display device according to an embodiment of the invention.

In Figure 1, the figure displayed on the display screen and l pair/
A 1-segment buffer (graphic data memory) 10 is provided to store nine graphic data corresponding to the segment buffer 10, and the graphic data from the segment buffer 10 is processed by the display processor 1z. ) is converted into raster data, and then written and stored in the graphic memory (rusk memory) 14.

A readout circuit 16 is provided to read out the contents of the graphic memory 14, and the readout circuit 6 is:
Scanning position signal of read position fit (x% y) 100
Graphic data is read out from the graphic memory 14 based on. Reading/reading circuit] Figure data signal 10 from 6
2 is supplied to a display circuit 20 via a blinking control circuit 18, which will be described later, and the graphic data signal 102 is D/A converted by the display circuit zO. The display signal 104 from the display circuit 20 is then supplied to a display device 22 such as a %CRT.

As a result, normal image display will be performed on the display 2z.

Next, when selecting and instructing a figure on the screen of the display device 2z, the figure is indicated by a figure indicator (not shown), for example, a pointing device such as a write-in, and the indicated position signal 106 from the figure indicator is is display processor 1
2. The display processor 1z obtains instruction figure data to be matched based on the instruction position signal 106,
The received graphic data signal 108 is sent to the area extraction circuit 24.
supplied to The area extraction circuit B4KFi is also supplied with an extraction circuit control signal 110 from the Display Pro 2 processor 12, and when the extraction circuit control signal 110 reaches the "extraction start" level, the one area extraction circuit 24 outputs the graphic data signal 108. : Find the minimum rectangular area θ surrounding the indicated figure based on:

That is, in the region extraction circuit z4, input graphic data (collection of vector data having a start point and an end point)
Minimum x value, maximum X value, minimum y value, maximum y value (m
1nx, rnaxx%min, , max,), i.e., (m1nx,
maxx, mlny%maxy) are sequentially replaced. Then, the extraction circuit control signal 110 indicates "extraction completed".
When the level is reached, the region extraction circuit z4 internally has (rn l n x%maxx) at that time.

mlny%max, ), that is, the minimum rectangular area 0 is output and supplied to the rectangular area signal 112F1 determination circuit 26.

The determination circuit z6 determines whether the read position (X%y) is within the minimum rectangular area θ based on the rectangular area signal 112 and the scanning position signal 100, and outputs a determination signal 114. In other words, the read position (x, y) is the minimum rectangular area θ
If the reading position (X%V) is not within the minimum rectangular area of 0 yen, the judgment signal 114 becomes the "/" level. This judgment signal 114 is transmitted to the blinking control circuit 18.
supplied to The blinking control circuit 18 is a circuit that performs blinking on the pixel 1i at the sheet readout position when the readout position (x, y) is within the minimum rectangular area θ,
Hereinafter, the configuration for triangulating the display will be described in detail.

In FIG. 1, an arm pulse generation circuit 28 is provided to output a pulse signal for blinking.
9 pulse generation - pulse signal 116t with constant timing from path 28! , are supplied to one input terminal of the AND circuit 3o. The other input terminal of the AND circuit 3o is supplied with the graphic data signal 102 from the readout circuit 16. Blinking signal 118t-
It is output to the blinking control circuit 18. Therefore, the blinking signal 118 corresponds to the 0.0. / information, O0/ information of the pulse signal 116,
The signal is the result of the logical product of .

FIG. 2 shows a timing chart of the block circuit according to the embodiment, that is, the nofrus signal 11
6, graphic data signal 102 and blinking signal 11
8 waveforms are shown. From this first figure, the waveform t of the blinking signal 118 can be understood, that is, the blinking signal 118 becomes the next signal after the graphic raster signal 102 is blinked according to the timing of the pulse signal 116.

Note that, as shown in FIG. 2, the nollus signal 116 has an on cycle (T, ) and one off cycle (T), and each cycle is an integral multiple of the screen refresh time. . For example, suppose the refresh time is 1 second/? If the cycle of the pulse signal 116 is 6.times.30=54 seconds, then the blinking signal 11.beta..mu. has a waveform in which each pixel is turned on and off in the cycle shown in FIG. 2, that is, H seconds.

The blinking control circuit 18 controls switching of the graphic data signal 102 or the blinking signal 118 based on the determination signal 114 from the determination circuit 26, and displays the selected signal on the display 22 via the display circuit 20. Please supply it to
As a result, the read position (X%V) is set to the minimum rectangular area 0.
If it is in a circle, the pixel at the iron readout position will be blinked. That is, as described above, when the indulgence position at(x, y) is in the minimum rectangular area 0 yen, the determination signal 114 is at the r/J level9, and thereby the blinking control circuit 18 is the blinking signal 11
B is selected and supplied to the display 22 via the selected blinking signal 118t-display circuit 20't-. on the other hand,
If the read position (,
02 is selected and the selected graphic data signal 102 is supplied to the display 4S22 via the display 4S20t-.

Therefore, according to the block circuit of the embodiment, when the operator instructs to select a figure on the display 22, each pixel within the minimum rectangular area θ surrounding the specified figure is displayed at a constant cycle. is in an on-off state, that is, blinking occurs. Note that pixels other than the #minimum rectangular area θ are in a state similar to the normal display state.

FIG. 3 shows a display state of the graphic display device according to the embodiment, and in FIG. 3, figures S7, $2, and S3 are displayed on the display 22. Note that the figures s and ri are figures for which 9 selections and 2 selections have been instructed by the figure indicator, and the figures S2 and S5 are figures for which selection has not been instructed.

Therefore, in FIG. 3, the minimum rectangular area θ surrounding the figure S is extracted, and within the area θ, the pixel is displayed in a blinking manner. All shapes S can be easily recognized.

Note that during normal display without any graphic selection instruction, normal image display is performed as follows. That is, in this case #'i, the clear signal 120 is supplied from the display processor 12 to the area extraction circuit 24, so that the rectangular area signal 112 from the area extraction circuit 24 is
The contents are all θ, that is, (m1nX, maxx
Xminy, maxy) = (θ, θ, 0, '0)
Therefore, the determination signal 114 from the determination circuit 26 becomes "0" level. Because (mln,, maxx,
Since there is no scanning position (reading position) that falls within the rectangular area of m1ny, maxy) = (0, 0, 0sO), the determination signal 114 is always at the rOJ level. Therefore, in the blinking control circuit 18, the input determination signal 114 is always at the 10'' level, and as described above, the blinking control circuit 18 selects the graphic data signal 1θ2. That is, the determination signal 114
is determined at the rOJ level, the graphic data signal 102
is selected, and as a result, normal image display will be performed on the display 22.

As described above, according to the embodiment of the present invention, a light pen, etc.? When a figure on the inting device display is selected, the display blinks in the minimum rectangular area θ surrounding the indicated figure, so the operator can see that the indicated figure has been selected. can be easily recognized,
It becomes possible to improve operability and responsiveness.

Note that in the above embodiment, the graphics memory is 1
Although a black-and-white graphic display device is used as the graphic display device i1, in the present invention, it is also possible to use a black-and-white gray scale graphic display device using a plurality of graphic memories. . Also, by using multiple graphics memories and readout circuits, and by using a color look-up table, the present invention can be easily applied to a rask-type color graphics display device.

As described in detail, according to the present invention, by adding a simple circuit, when an image is indicated on a display, the display is blinked within an area surrounding the indicated image. Therefore, the image specified on the display can be easily recognized, and operability and responsiveness can be improved.

[Brief explanation of drawings]

FIG. 1 is a block circuit diagram of a graphic display device according to an embodiment of the present invention, FIG. 2 is a timing chart diagram of a block circuit according to an embodiment, and FIG. 3 is an explanatory diagram showing a display state of a graphic display device according to an embodiment. be. 10... Segment buffer, 14... Graphic memory, 18... Blinking control circuit, 22...
- Display device, 24... Area extraction circuit, 26... Judgment circuit, 28... Arm pulse generation circuit, 80... AND circuit.

Claims (1)

[Claims] 111 A graphic memory for storing image information, a display for displaying images, an image indicator for indicating a desired image on the display, and a KM for indicating multiple images on the image indicator. an area extraction circuit that extracts an area surrounding the image based on the hindlimb image information that finds the image information that matches both images; and a blinking control circuit that blinks the pixel at the readout position when the readout position is within the area based on the determination signal from the determination circuit, A graphic display device characterized in that the display is blurred/king in an area surrounding the displayed image.