JPS61129688A - Cursor display for 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 [Technical Field of the Invention] The present invention relates to a cursor display method in a display device used in a display device displaying a binary image used in, for example, an image file device.

[Technical background of the invention and its problems] In a display device that displays a binary image used in a file device or the like, a cursor that indicates a position on the screen is usually used by inverting the content on the screen. In such a device, the cursor in the white part is black and the cursor in the black part is white, so it can be easily distinguished. On the other hand, there is a drawback in that it is difficult to identify the above-mentioned cursor in images such as newspapers where black and white are frequently inverted.

[Object of the Invention] This invention has been made in view of the above circumstances, and its purpose is to provide a cursor display method on a display device in which the cursor can be clearly identified regardless of the displayed content on the screen. be.

In order to achieve the above-mentioned object, the present invention provides an apparatus for displaying data according to binary image information, in which a plurality of bit widths are used.
The cursor is displayed in an inverted pattern consisting of inverted pixels and non-inverted pixels.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a schematic configuration of a display device according to the present invention, which is used in an image file device.

That is, reference numeral 1 denotes a refresh memory that stores binary image information for one screen supplied from a main control section (not shown) of the image file device.

Reference numerals 2 and 3 denote a vertical counter and a horizontal counter, respectively, which designate the read address of the refresh memory 1.

The address signals of the vertical counter 2 and horizontal counter 3 are supplied to the refresh memory 1, comparison circuit 4 and matrix table 5 (lower 1 bit). The comparison circuit 4 compares the address of the cursor C supplied from the main control section with the addresses of the vertical counter 2 and horizontal counter 3, that is, the read address of the refresh memory 1, and when they match, the cursor display signal is This outputs the following. The cursor C is specified to have a width of a plurality of bits (for example, 4 bits). The cursor display signal from the comparison circuit 4 is supplied to the matrix table 5.

As shown in FIG. 2, this matrix table 5 stores an inversion pattern in which an inversion signal and a non-inversion signal are arranged in a 2×2 pixel matrix, and is made up of, for example, a ROM. The table reading position in the matrix table 5 is determined by the address signal from the vertical counter 2 (lower one of the actual address signal).
(bit) and the address signal from the horizontal counter 3 (lower one bit of the actual address signal). For example, from vertical counter 2 to “0”
”, if rOJ is supplied from the horizontal counter 3, and “1” is supplied from the vertical counter 2, and “1” is supplied from the horizontal counter 3.
” is supplied, reads “1” as an inverted signal,
"0" from vertical counter 2, "1J" from horizontal counter 3
is supplied, and "1" from vertical counter 2,
When rOJ is supplied from the horizontal counter 3, "0" is read out as a non-inverted signal. When the matrix table 5 is supplied with the cursor display signal, it outputs an inverted signal or a non-inverted signal read out corresponding to the address. The inverted signal or non-inverted signal from the matrix table 5 is supplied to an exclusive OR circuit 6.

This exclusive OR circuit 6 performs an exclusive OR operation on the image signal read out from the refresh memory 1 according to the address signal and the inverted signal or non-inverted signal from the matrix table 5, and performs the exclusive OR operation. It outputs the results. The signal from the exclusive OR circuit 6 is supplied to the image display section 7. This image display section 7 displays a binary image in response to the signal from the exclusive OR circuit 6, and is composed of, for example, a CRT display device. Therefore, when the cursor C is in a white area, as shown in FIG. It is now displayed as . Further, when the cursor C is in a black area, as shown in FIG. 4, it is displayed in a houndstooth pattern different from that in a white area.

Next, the operation in the above configuration will be explained. For example, one screen's worth of binary image information is now stored in the refresh memory 1. Then, according to address signals from the vertical counter 2 and the horizontal counter 3, image signals are sequentially output pixel by pixel to the exclusive OR circuit 6. Further, the address signal is compared by a comparison circuit 4 with a cursor address from a main control section (not shown). As a result of this comparison, only if they match, a cursor display signal is output. Further, the table reading position in the matrix table 5 is designated by the lower one bit of the address signals from the vertical counter 2 and horizontal counter 3. This results in
When the cursor display signal is supplied from the comparator circuit 4 to the matrix table 5, one of the inversion patterns specified for reading at this time, that is, the inversion signal "1" or the non-inversion signal fOJ is output from the matrix table 5 with exclusive logic. It is output to the sum circuit 6. Therefore, when the exclusive OR circuit 6 is supplied with the non-inverted signal from the matrix table 5, the exclusive OR circuit 6 receives the 1
If the image signal for each pixel is output as is to the image display section 7, and an inverted signal is supplied from the matrix table 5, the image signal for each pixel from the refresh memory 1 is inverted and output to the image display section 7. Output.

As a result, when the cursor C is in the white area, as shown in Figure 3, the inverted pixel a and the non-inverted pixel 2 are displayed in a 4-bit width arranged in a houndstooth pattern, that is, visually it is a halftone. is displayed. Also, if cursor C is in the black area,
As shown in FIG. 4, the white area is displayed in a different houndstooth pattern.

As mentioned above, by displaying the cursor in midtones, when the surrounding area is black, the cursor is displayed in a light color, and when the surrounding area is white, the cursor is displayed in a dark color, making it possible to clearly identify the cursor. .

In the above example, the width of the cursor is 4 bits, but the width is not limited to this and may be a plurality of bits other than 4 bits. Further, although inverted pixels are used, the present invention is not limited to this, and a white and black pattern as shown in FIG. 3 may be displayed regardless of the image information.

Also, the inversion pattern was composed of 2x2 pixels,
The matrix is not limited to this, and other matrices such as 2×4 pixels may be used. In this case, the lower two bits of the address signal are used to specify the read position of the table. Further, the reversal pattern may be a reversal pattern that makes use of image information, for example, a reversal pattern with many reversed pixels as shown in FIG. 5, or a reverse pattern with few reversed pixels as shown in FIG. 6. . As a result, when the inversion pattern shown in FIG. 5, which has many inverted pixels, is used, white parts become blackish and black parts become whitish, as shown in FIG. 7. This results in slightly stronger contrast when the surroundings are pure white or black. Also,
When the inversion pattern of FIG. 6, which has fewer inversion pixels, is used, the contrast of the cursor portion is reduced, as shown in FIG. 8. Furthermore, the image display section may be subjected to brightness modulation so that the contrast of the cursor differs from that of other parts.

[Effects of the Invention] As described in detail above, according to the present invention, it is possible to provide a cursor display method on a display device in which the cursor can be clearly identified regardless of the display content on the screen.

[Brief explanation of the drawing]

The drawings are for explaining one embodiment of the present invention. FIG. 1 is a block diagram showing a schematic configuration, FIG. 2 is a diagram for explaining a reversal pattern, and FIGS. 3 and 4 are diagrams showing a cursor. FIGS. 5 and 6 are diagrams showing display examples; FIGS. 5 and 6 are diagrams for explaining reversal patterns in other embodiments; FIGS. 7 and 8 are diagrams illustrating cursor display examples in other embodiments; FIGS. It is. 1...Refresh memory, 2...Vertical counter,
3... Horizontal counter, 4... Comparison circuit, 5... Matrix table, 6... Exclusive OR circuit, 7...
・Image display section, C...cursor, a...inverted pixel,
b...Non-inverted pixel. Applicant's representative Patent attorney Takehiko Suzue Figure 1 Figure 2 Figure 5 Figure 6 Drawing -/) 71 (No change in content) Figure 7 Figure 8 Commissioner of the Patent Office Manabu Shiga 1゜Indication of the case Japanese Patent Application No. 59-252307 2, Cursor Display Method in Invention Name Display Device 3, Relationship with the Nagisa Case for Amendment Patent Applicant (307) Toshiba Corporation 4, Agent March 26, 1985 7, Contents of amendment: Engraving of drawing No. 3.4.7.8 originally attached to the application.
As shown in the attached sheet (no change in content) procedural amendment May 1988. On the 2nd, Mr. Manabu Shiga, Director General of the Patent Office, 1. Display of the Case, Application No. 59-252307, 2. Title of the Invention, Cursor Display Method on the Examination Display Device, 3. Relationship with the Person Who Makes the Amendment, Patent Applicant (307) Toshiba Corporation 4, Agent 6, Particulars Subject to Amendment 7, Page 8, line 10 of the statement of contents of the amendment, the phrase "designated" was replaced with "designated". "I do." I am corrected.

Claims (2)

[Claims] (1) A display that performs display according to binary image information, characterized in that it is provided with display means that displays a cursor in an inverted pattern consisting of inverted pixels and non-inverted pixels with a plurality of bit widths. Cursor display method on the device. (2) A cursor display method in a display device according to claim 1, wherein the combination of inverted pixels and non-inverted pixels in the cursor is in a houndstooth pattern.