JPS6055391A - Display controller - 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 a display control device that supplies attribute data to image data and performs attribute processing using hardware to generate a display pattern.

Conventional Structures and Problems Generally, there are devices shown in FIGS. 1a and 1b that give attributes such as inversion, blinking, and underlining to a display pattern.

The method shown in FIG. 1a uses a method in which some bits of the output data of the image data memory are defined as attribute data and the image data is processed using this. That is, the refresh address counter 101 supplies the natres 105 to the image data memory 102, and one image data 106 is output. In this case, if the character code turn generator 103 is provided, the data 1o6 becomes a character code. Here, some bits of the image data 106 are separated as attribute data 10, and the remaining bits are treated as original image data (or character code). The attribute processing circuit 104 modifies the image data (or the output data 1o8 of the character pattern generator) with attribute data 107 to generate display data 109. This display data 10
9 is displayed on the display T.

The one shown in FIG. 1A differs from the one shown in FIG. 1 in that it has an image data memory 111 and an attribute data memory 112 that are logically independent; The display data 119 is generated by performing the same processing as above.

As described above, in both of the apparatuses shown in FIGS. 1a and 1b, one piece of image data corresponds to one piece of attribute data.

For example, as shown in Figure 2, multiple alphabetic characters, numbers, and kana characters (
When considering the case where ANK characters (collectively referred to as MNK characters) are to be displayed, the same attribute is given to multiple ANK characters, resulting in the problem that each character cannot be modified independently. .

Purpose of the Invention In view of the above-mentioned problems, the present invention provides a plurality of attribute areas within one image data to give independent attributes to, for example, a plurality of ANK characters within one kanji pattern area. It is an object of the present invention to provide a display control device that enables various display modifications such as the following.

Configuration of the Invention The present invention has a memory that stores image data having a width of a plurality of bits and attribute data having a width of a plurality of bits,
A display control device that performs attribute processing by associating each data with each other, which divides the bits of attribute data into multiple parts, defines an attribute data pattern for each bit set, and divides the bits of image data into multiple parts. This configuration is configured to generate a plurality of attribute areas within one image data by performing attribute processing by associating image data and attribute data in units of divided bit sets.

DESCRIPTION OF EMBODIMENTS FIG. 3 shows a display control device according to an embodiment of the present invention, in which 301 is a refresh address counter that outputs an address 306, 302 is a memory for storing image data and attribute data, and 3Q3 is a memory for storing image data. 304 and 305 are attribute processing circuits for upper bits and lower bits, respectively, and the processed output is displayed on a display 314.

Next, the operation of this embodiment will be explained.

The refresh address counter 301 periodically accesses the image data memory 302 at an address 306 in accordance with the display operation, and outputs image data 307. Then, a part (multiple bits) of the data 307 is separated as attribute data 310, and the remaining bits act as original image data (character code if the character pattern generator 303 is included). Here, the image data (or output data of the character pattern generator) is divided into upper bits 308 and lower bits 309, and inputted to upper bit attribute processing circuit 304 and lower bit attribute processing circuit 305, respectively.

At the same time, attribute data 310 is similarly divided and supplied to attribute processing circuits 304 and 305 for attribute processing. As a result, attribute areas corresponding to the division of image data are generated within one image data.

Next, FIG. 4 is a modification of FIG. 3, and has almost the same configuration and operation as FIG. 3, but the difference from FIG. 3 is that the image data memory 4Q2 and attribute data memory 403 are logically The point is that image data and attribute data are output independently from the beginning. The structure and operation for other data processing is similar to that shown in FIG.

Although the embodiments of the present invention have been described above, the present invention further has the following flexibility. That is, although FIGS. 3 and 4 show a typical example where there are two attribute areas in one image data, the format of the attribute area can be changed arbitrarily by changing the way the image data is divided. Can be set to . For example, it is not only possible to divide the area into left and right equal parts as shown in FIG. Furthermore, as shown in d, one attribute area can be divided. This can be realized by giving the same attribute data to a plurality of divided attribute areas. In any of the above cases, a wide variety of modifications can be made by appropriately setting each attribute.

Further, the pattern of attribute data (format of definition given to each bit) can be set independently for each divided bit set. This allows for even more diverse modifications.

Conversely, if the same attribute data pattern is set for each bit set of the divided attribute data, it becomes possible to give the same attribute to each attribute area. This makes it possible to make the attributes of the entire character uniform even when one character is displayed over the entire width of the image data (or in a range that exceeds it).

Further, as with image data, the format of division of attribute data, that is, the number of divisions and the number of bits of each divided pit set, are arbitrary.

Furthermore, the number of divisions of image data and the number of divisions of attribute data do not necessarily have to match. It is only necessary that one arbitrary attribute data be given to each bit set of the divided image data.

Effects of the Invention As is clear from the above embodiments, according to the present invention, a plurality of attribute areas can be provided in one image data, and thereby, for example, a plurality of ANK characters, etc. can be provided in one Kanji pattern area. When displaying characters, it becomes possible to give independent attributes to each character, etc.

Furthermore, since the format of the attribute area (area size, number of divisions, etc.) can be arbitrarily set, a wide variety of display modifications can be performed.

As described above, a display device capable of a highly flexible display format can be realized, and its practical effects are significant.

[Brief explanation of drawings]

1A and 1B are block diagrams of conventional display control devices, FIG. 2 is a diagram showing an example of a display format in which desired attribute control cannot be performed with a conventional display control device, and FIG. 3 is a block diagram of a conventional display control device. FIG. 4 is a block diagram of a display control device according to an embodiment, FIG. 4 is a block diagram of another embodiment, and FIG. 5 is a diagram showing an example of an attribute area format that can be realized according to the present invention. 3Q1...Refresh address counter, 3
02... Memory for image data and attribute data, 303... Character pattern generator, 304...
...Attribute processing circuit for upper bits, 305...
- Attribute processing circuit for lower bits. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 5
Figure (θ Shin (C) (b) (t) Month-attribute

Claims (1)

[Claims] A memory for storing image data having a width of a plurality of bits and attribute data having a width of a plurality of bits, and a processing circuit for performing attribute processing by associating each data are provided, and the bits of the attribute data are divided into a plurality of bits. dividing the image data and defining an attribute data pattern for each bit set, dividing the bits of the image data into a plurality of bits, and performing attribute processing by associating the image data and the attribute data for each divided bit set. A display control device is characterized in that a plurality of attribute areas are generated within one image data by performing the following operations.