JPS60113290A - Display - 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 display device applied to, for example, a videotex receiving terminal or a still image display device such as an image data input device.

``Background Art and Its Problems'' For both videotex-based stationary terminals, there are no regulations regarding the speed of drawing, for example, the filling speed of a closed area of a figure. If the filling speed is faster, the display time can be shortened, but on the other hand, it may be so different from the actual filling speed that a person feels uncomfortable.

In conventional stationary terminals, the drawing speed, such as the filling speed, is uniquely determined by the processing unit's algorithm, which can sometimes make users feel uncomfortable.

``Object of the Invention'' Therefore, an object of the present invention is to provide a display device that allows the user to control an appropriate drawing speed and display still images without causing any discomfort. .

"Summary of the Invention" The present invention includes a processing unit to which input graphic data is supplied and performs detection of closed areas, a raster memory into which display data is written based on output from the processing unit, and an output read from the raster memory. This display device includes a display device to which data is supplied, and the transfer speed of data for drawing processing from a processing unit to a raster memory is controlled from the outside.

"Embodiment" An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 indicates a processing section composed of a microcomputer. This processing section 1 has a data buffer, and data received from the videotex center is stored in this data buffer.

As one of the Videotex methods, Pr)I (Picture Disscripti) is used to display figures.
Some use a language called onInStruction).

This language uses one figure as a point (POINT) and a line as CLINE.
).

It is expressed by a combination of basic elements for graphical display consisting of five types: arc (ΔRC:), rectangle (RECTΔNGLE), and polygon (1) OLYGON. Received data using this language is composed of, for example, a common control command, an image description command, and vertex data. The common control command is
The common control commands include commands for displaying characters or figures, commands for setting parameters such as logical pixel size, and other commands, and these common control commands are stored in the data buffer of the processing section 1. The image description command also includes the display area,
drawing color.

This is used to specify the outline line, the type of processing for closed areas, etc. Furthermore, the vertex data specifies the vertex data defined in the coordinate system of the data calculation area, and whether this vertex data forms a straight line, an arc, or an inclination of a polygon.
This is only for specifying whether or not to process closed regions. This image description command and vertex data are stored in the data buffer of the processing section 1.

The processing unit 1 forms a flag using the data stored in the data buffer, and writes this flag into the flag memory. Further, this flag is read out from the flag memory to the processing section 1, and the closed region is detected in the processing section 1. When a closed area is detected, the raster memory control circuit 5 is sent from the processing unit 1 to fill it in.
A command for filling processing is given to determine which area of the display area is to be output in which color. The processing unit 1 is supplied with output data from a tablet 2 for inputting graphic data so that graphic data other than the received data can be input.

A keyboard 3 and a control lever 4 for manually controlling speed parameters are connected to the processing section 1, so that necessary control information can be manually input. For example, a command to fill in polygonal graphic data is given to the processing section 1 via the keyboard 3, and the filling speed is specified via the control lever 4.

By supplying data from the processing section 1 to the raster memory control circuit 5, predetermined display data is stored in the raster memory 6 corresponding to a display area (for example, one frame). The display data read out from the raster memory 6 is converted into analog display data by the D/A converter I and supplied to the CRT display 8. The reading scan of the raster memory 6 and the beam scan of the CRT display 8 are assumed to be synchronized. When the raster memory 6 is read, data of a predetermined color is filled in at a predetermined address corresponding to the closed region using data from the processing section 1 for filling in the closed region. This fill-in data is supplied from the processing section 1 to the raster memory control circuit 5 and the raster memory 6 at a transfer rate according to the parameters from the control lever 4 by the software of the processing section 1.

As shown in FIG. 2, data to be filled in is output from the processing section 1 to the raster memory control circuit 5 and the raster memory 6 after idling N times. The number of idle links N is the idle time until the processing unit 1 actually outputs the data for filling,
The number N of idle links is given to the processing section 1 by the control lever 4. Therefore, the received figure is displayed on the screen of the CRT display 8, and the closed area of the received figure is filled with a predetermined color at a predetermined speed.

Processing similar to that described above is performed not only when processing received graphic data but also when graphic data input from the tablet 2 is processed.

FIG. 3 is a block diagram of another embodiment of the invention,
Similar to the previous embodiment, the processing unit 1. Ustar memory control circuit 5. A raster memory 6, a D/A comparator 7, and a CRT display 8 are provided so that graphic data from the center or graphic data input manually using the tablet 2 can be processed.

In this other embodiment, drawing speed data inputted by the control lever 4 is supplied to the raster memory control circuit 5, unlike the above-mentioned embodiment in which the drawing speed data inputted by the control lever 4 is used as a parameter for non-ware (display routine) in the processing section 1. From the raster memory control circuit 5 to the processing unit 1
, the way that depends on the drawing speed data
i) It is designed to form a signal. That is, in another embodiment of the present invention, a wait signal is formed using hardware to control the transfer speed of data output from the processing section 1 for filling-in processing.

"Effects of the Invention" According to this invention, the user can set the desired drawing speed in still image display devices such as Videotex's still terminals, and it is possible to achieve an appropriate drawing speed. , the displayed content can be made to look natural.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of this invention, and FIG. 2 is a flowchart used to explain the operation of an embodiment of this invention.
FIG. 3 is a block diagram of another embodiment of the invention. 1 Processing! , 4. Control lever, 5. Raster memory control circuit, 6. Raster memory, 8--
CRT display. Agent Masato Sugiura

Claims (1)

[Claims] The input figure data is supplied to a processing section that performs things such as detecting closed regions, and display data is converted into one by the output from this processing section.
A display device is provided with a raster memory to which data is stored, and a display device to which output data read from the raster memory is supplied, and the transfer speed of data for drawing processing from the processing unit to the raster memory is externally controlled. A display device that looks like this.