JPH04199189A - Display controller - Google Patents

Abstract

PURPOSE:To allow the assignment of a cursor display position in one dot unit by reading cursor pattern data out of a display memory independently from display data in the display control of character broadcasting, then synthesizing this data with the display data. CONSTITUTION:The cursor pattern data is stored into the empty region of the display memory 2. The cursor pattern data is read out in the sequence of scanning in compliance with the signal from a timing generating section 22 by a cursor address generating section 4 and is accessed to the memory 2 through an address switching section 5. The read out data is converted to serial data in a parallel/serial conversion section 17 via a cursor data latch section 11. The R, G, B, RI signals of every one bit from a front scenery/back scenery switching section 19 and the R, G, B, RI signals of the cursor from a cursor color register section 20 are switched and outputted by the cursor pattern data in a cursor/background switching section 21.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applicable to a display control device for a teletext receiver, for example, in which the coloring unit is block coloring rather than one dot unit, and the display plane is single. The present invention relates to a display control device that enables flexible cursor display.

Conventional technology In recent years, as television receivers have become more sophisticated and have higher added value, they have become more multi-functional such as built-in BS/text broadcasting and multi-screen display functions. There is a need for improved operability.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of a conventional display control device used in a teletext receiver having a block coloring/single display brain will be described below with reference to the drawings. FIG. 2 is a block diagram of a display brain for teletext broadcasting, and FIG. 7 is a functional block diagram of a conventional display control device in a teletext receiver.

First, the display plane of teletext will be explained with reference to FIG. The display data for teletext broadcasting is character pattern data (the character part is "]" and the part that is not 11 sentences is "0゛) (hereinafter referred to as Y data), '1' of Y data.
Foreground color data (hereinafter referred to as FG data) specifies the color of the 4-bit color code, and background color data (hereinafter referred to as FG data) specifies the color of the 0° portion of the Y data with a 4-bit color code.
It is composed of attribute data (hereinafter referred to as DA data) that specifies one character's flashing, etc. using four focus data (hereinafter referred to as BG data). Also, the coloring is block coloring, and F
One data each of C data, BG data, and DA data is designated. Furthermore, there is only one display plane, and both characters and graph ink are written on the same plane.

Next, the configuration of a conventional display control device in a teletext receiver will be explained. In FIG. 7, reference numeral 40 denotes a microcomputer system unit which receives teletext data, decodes it, and converts it into the above-mentioned display data that can be displayed on a display. 4I is a display memory section in which the above-mentioned display data is stored.

42 is a display address generation unit which generates Y data in the order in which the display data stored in the display memory unit 41 is scanned.

It generates addresses for reading each data of FG data, BC data, and DA data.

43 is a data latch section, FG data latch section 44°B
G Detail Latch Section 45. Y data latch section 46. It consists of a DA data latch section 47, which latches each data read out from the display memory section 4. 48 is a parallel/serial (P/S) converter, which converts the FC data P
/S conversion unit 49. BG data P/S converter 50. Y data P/S converter 51. DA data P/S converter 52
This section converts the data latched as parallel data from the display memory section 41 into serial data in accordance with the display timing. Reference numeral 53 denotes an attribute control unit which performs control such as flushing on the Y data based on the DA data. Reference numeral 54 denotes a foreground color/background color switching section, which switches the foreground color and background color according to the Y data from the attribute control section 53 and outputs the same. A timing ordering section 55 generates address generation timing for the display address generation section 42, latch timing for the data latch section 43, serial shift timing for the parallel/serial conversion section 48, and the like.

Regarding the conventional display control device configured as described above,
Let's explain its operation.

First, the microcomputer system unit 40 receives teletext data superimposed on TV radio waves, decodes the data according to the teletext protocol, converts it into display data that can be displayed on the display, and stores each data (Y data) in the display memory unit 41. , FG data.

BG data, DA data) are stored in the order of scanning. Then, the display address generation section 42 scans the display data stored in the display memory section 41 in the order of Y data, FC data, and BG data.

An address for reading each data of the DA data is generated, and each read data is latched by the data latch section 43. Each latched data is parallel/
The serial converter converts it into serial data in accordance with the serial shift timing signal from the timing generator 55 on the fourth day, and the attribute controller 53 performs control such as flushing the Y data using DA data, and the foreground color/background color switcher 54 The foreground color and background color are switched according to the Y data from the attribute control section 53, and R, G, B, and R1 (half-brightness signals) are output for each dot.

Next, a cursor display method using the above conventional display control device will be explained with reference to the drawings.

FIG. 8 is a diagram of a conventional display screen, and FIG. 9 is a diagram of a conventional display memory map.

FIG. 8(b) shows a red arrow cursor indicating "C" displayed on the screen shown in FIG. 8(a). Coloring unit is 4 X 4 F' y l
- Since it is a unit, the data of the arrow cursor cannot be placed freely, so the data of °゛T'' on the second line on the display memory section 41 is rewritten to the data of the arrow cursor. The data of ``T'' is temporarily saved in the free area of the display memory map shown in Figure 9.When the arrow cursor is deleted or moved, the data of ``T'' that was temporarily saved in the free area is saved again. Return it to its original location.

Problems to be Solved by the Invention However, with the above configuration, for example, when searching for teletext programs, the conventional method of manually using the keys on a remote control is improved, and the program number displayed on the table of contents screen etc. can be indicated with a cursor. New operations such as searching for programs using
When realizing a user interface (user interface), the data originally written in the display memory 41 is rewritten into cursor data, which limits the cursor's movement speed and display position.

Alternatively, there is a problem in making the cursor explicit.

In other words, in order to display a cursor with a conventional display control device, the original data must be saved and restored each time the cursor is displayed, moved, or deleted, which slows down the display to the point that it causes discomfort to the user. It is. Furthermore, when the background screen is being scrolled, this becomes noticeable, and the scrolling must essentially be stopped.

Furthermore, the display position can only be specified in units of 4 x 41 nodes,
This has the problem that accurate cursor instruction cannot be made, and if the background screen color and cursor color are the same, the cursor cannot be clearly indicated.

The present invention solves the above-mentioned conventional problems, and provides a display control device in which the cursor can be clearly displayed regardless of the background screen, the cursor can be displayed, moved, and erased instantly, and there is no restriction on the display position. .

Means for Solving the Problems In order to solve the above-mentioned conventional problems, a display control device according to a first aspect of the present invention includes a display address generation section for reading out display data in scanning order, and cursor pattern data (Y data). a cursor address generation section for reading out data in the scanning order; an address switching section for switching between address data from the display address generation section and address data from the cursor address generation section; and a cursor data latch section for latching the cursor pattern data. , a cursor parallel/serial converter that converts cursor pattern data latched as parallel data into serial data that matches the display timing, a cursor color register that sets the cursor color, and a cursor parallel/serial converter that converts A cursor/background switching unit is provided which switches and outputs background data and cursor data (both color data) from a cursor color register unit based on cursor pattern data.

Furthermore, in the display control device of the second aspect of the present invention, the cursor color register section among the components of the display control device of the first aspect of the present invention is a first cursor color register section that sets one cursor color of two specified colors. , the second to set the cursor color of the other
Consists of a cursor color register section, a cursor flushing section that flashes the cursor by switching between the output of the first cursor color register section and the output of the second cursor color register section, and a timer section that sets the cycle of cursor flashing. It is something.

According to the first aspect of the present invention, the cursor pattern data is read from the display memory independently of the original display data during the retrace period of horizontal scanning for displaying the cursor, and prior to reading the original display data. Since the cursor data is synthesized with the original display data after being read out, the cursor display position can be specified in dot units, and the cursor can be displayed, moved, and erased instantly.

In the second aspect of the present invention, the above-described configuration enables flashing of the cursor, and the cursor can be clearly displayed regardless of the color of the background screen of the cursor.

Embodiment A first embodiment of the display control device of the present invention applied to a teletext receiver having a block coloring/single display brain will be described below with reference to the drawings. FIG. 1 is a functional block diagram of a display control device according to a first embodiment of the present invention applied to a teletext receiver, FIG. 2 is a block diagram of a display brain for teletext broadcasting, and FIG. 3 is a display control device of the present invention. FIG. 3 is a display memory map diagram of FIG.

The display brain for teletext broadcasting has been explained in the conventional example section, so its explanation will be omitted here.

Next, the configuration of the display control device of the present invention in a teletext receiver will be explained. In FIG. 1, reference numeral 1 denotes a microcomputer system unit which receives teletext data, decodes it, and decodes it into the above-mentioned display data that can be displayed on a display. Reference numeral 2 denotes a display memory section in which the above-mentioned display data is stored. Reference numeral 3 denotes a display address generation section, which generates addresses for reading each data of Y data, FC data, BG data, and DA data in the order of scanning the display data stored in the display memory section 2. Reference numeral 4 denotes a cursor address generation section which generates an address for reading out the cursor pattern data (Y data) stored in the display memory section 2 in scanning order. Reference numeral 5 denotes an address switching section which switches between the address data from the display address generation section 3 and the address data from the cursor address generation section 4. 6 is a data latch section, and FG data latch section 7. BG Detail Latch Section8. Y data latch section 9. It is composed of a DA data latch section 10 and latches each data read out from the display memory section 2.

Reference numeral 11 denotes a cursor data latch section that latches the cursor pattern data read out from the display memory section 2. 12 is a parallel/serial (P/S) converter; FG data P/S converter 13; BG data P/S converter 14; Y data P/S converter 15. DA data P/S
It is composed of a converting section 16 and converts data latched as parallel data from the display memory section 2 into serial data in accordance with the display timing. 1
Reference numeral 7 denotes a cursor parallel/serial conversion section which converts the cursor pattern data latched as parallel data from the display memory section 2 into serial data in accordance with the display timing. 18 is an attribute control section;
This is where control such as flushing is applied to the Y data using the DA data. 19 is the foreground color/background color switching section,
This is where the foreground color and background color are switched using the Y data. 20 is a cursor color register section for setting the color of the cursor.

Reference numeral 21 denotes a cursor/background switching section which switches between background data and cursor data (both color data) and outputs the same based on the cursor pattern data from the cursor parallel/serial converter 17.

Reference numeral 22 denotes a timing generation section which generates address generation timing for the display address generation section 3, address generation timing for the cursor address generation section 4, latch timing for the data latch section 6, latch timing for the cursor data latch section 11, Serial shift timing to parallel/serial converter 12.

This is where the serial shift timing for the cursor parallel/serial converter 17 is generated.

First, the normal operation of the display control device according to the first embodiment of the present invention configured as described above without a cursor displayed will be described.

The Suzu microcomputer system unit 1 receives teletext data superimposed on TV radio waves, decodes the data according to the teletext protocol, converts it into display data that can be displayed on a display, and stores each data (Y) in the display memory unit 2.
data, FC data.

(Be data, DA data) are stored in the order of scanning. Then, the display address generation section 3 scans the display data stored in the display memory section 2 in the order of Y data, FG data, and Be data.

An address for reading each data of the DA data is generated, the display memory section 2 is accessed through the address switching section 5, and each read data is sent to the data latch section 6.
It is latched. Each latched data is converted into serial data by the parallel/serial converter 12 in accordance with the serial shift timing signal from the timing generator 22, and the attribute controller 18 converts the latched data into serial data according to the DA data.
The foreground color/background color switching section 19 performs control such as flashing on the data, and switches the foreground color and background color based on the Y data from the attribute control section 18, thereby converting R and G for each dont.

B and R1 are selected and output through the cursor/background switching section 21.

Next, we will explain the operation when the cursor is displayed (however, the explanation of the operations similar to the normal operation will be omitted.

). The cursor pattern data is stored in the free space of the display memory 2 shown in the display memory map diagram in FIG.
The cursor address generation section 4 generates an address for reading out the cursor pattern data in the scanning order in accordance with the address generation timing signal from the timing generation section 22, and accesses the display memory section 2 through the address switching section 5. be. The read cursor pattern data is latched by the cursor data latch unit 11, and the latched data is converted into serial data by the cursor parallel/serial converter 17 in accordance with the serial shift timing signal from the timing generator 22.
In the cursor/background switching unit 21, R and G for each dot from the foreground color/background color switching unit 19, which is the background of the cursor.

The B, R1 signals and the cursor R, G, B, R1 signals from the cursor color register section 20 are switched and outputted based on the cursor pattern data.

Further explanation will be given with reference to FIG. 4, which is a display screen diagram of the display control device of the present invention, and FIG. 5, which is a cursor read timing diagram of the display control device of the present invention. Fourth
The screen shown in Figure (a) with a red arrow cursor indicating "PC" is shown in Figure (a).
In b), the "T" in the background of the cursor is displayed almost as is, although part of it is missing. This is because the data in display memory 2 is not being rewritten, but rather the cursor data is being combined with the read data.Furthermore, the display position is changed in dot units regardless of the coloring unit in display memory 2. It will be done.

Also, the original data is temporarily saved when the cursor is displayed.

Since there is no need to return, the cursor can be displayed, moved, and deleted instantly. Figure 5 is a cursor readout timing diagram. Since the cursor pattern data is read out during the retrace period of the horizontal scan that displays the cursor, before the original display data is read out, there is no effect on the original display data. It has no effect.

As described above, in the first embodiment of the present invention, the cursor pattern data is read out from the display memory 2 independently of the original display data, and then the cursor data is combined with the display data of the lights, so the cursor display position can be specified in dot units, and the cursor can be displayed, moved, and deleted instantly. Therefore, for example, when searching for teletext programs, the conventional method of manually using the keys on a remote control has been improved, and a new operation (user interface) has been developed to search for programs by pointing the program number displayed on the table of contents screen etc. with a cursor. can be easily realized.

Next, a display control device according to a second embodiment of the present invention will be described with reference to the drawings. However, the same numbers as those in the first embodiment are given the same numbers, and the description thereof will be omitted.

FIG. 6 is a functional block diagram of a display control device in a second embodiment of the present invention. In FIG. 6, reference numeral 26 denotes a first cursor color register section, which is used to set one color of the cursor which can specify two colors. 23 is a second cursor color register section, which, like the first cursor color register section 26, is a second cursor color register section;
This is to set the cursor color. Reference numeral 24 denotes a cursor flushing section which performs flushing of the cursor by switching between the output of the first cursor color register section 26 and the output of the second cursor color register section 23. Reference numeral 25 denotes a timer section for setting the cycle of cursor flashing.

The operation of the display control device according to the second embodiment of the present invention configured as described above will be explained.

The cursor color set in the first cursor color register section 26 and the cursor color set in the second cursor color register section 23 are switched in the cursor flushing section 24 at a cycle set by the timer section 25, and the cursor is flushed. It is. This allows the cursor to be clearly displayed regardless of the color of the cursor's background screen.

Effects of the Invention As described above, the first aspect of the present invention includes a display memory section that stores display data, and a display address generator that generates an address for reading out each display data stored in the display memory section in scanning order. a cursor address generation section that generates an address for reading out the cursor pattern data stored in the display memory section in scanning order; address data from the display address generation section and an address from the cursor address generation section. an address switching section for switching data; a data latch section for latching each display data read from the display memory section; a cursor data latch section for latching the cursor pattern data read from the display memory section; A parallel/serial converter that converts the data latched by the data latch section into serial data in accordance with the display timing, and a parallel/serial converter that converts the cursor pattern data latched by the cursor data latch section into serial data in accordance with the display timing. a cursor parallel/serial converter that performs control such as flashing on pattern data using the attribute data from the parallel/serial converter; a foreground color/background color switching section that switches between the foreground color data and the foreground color data from the conversion section; a cursor color register section that sets the cursor color; and a cursor pattern data from the cursor parallel/serial conversion section that changes the foreground color. A cursor/background switching section that switches and outputs the output of the background color switching section and the output of the cursor color register section, and a timing ordering section that generates address ordering timing, latch timing, serial shift timing, etc. Ru. Therefore, the cursor display position can be specified in dot units, and the cursor can also be displayed and moved.

This has the effect that erasing can be done instantly.

Furthermore, in the second aspect of the present invention, the cursor color register section of the first aspect of the present invention has a first cursor color register section that sets one color of a cursor that can be set with two colors, and a second cursor color register section that sets the other color. two cursor color register sections, a cursor flushing section that outputs cursor color data by switching between the output of the first cursor color register section and the output of the second cursor color register section, and generating a switching signal for the cursor flushing section. This is a display control device configured with a timer section. Therefore, the cursor can be flashed, and the cursor can be clearly displayed regardless of the color number of the background screen of the cursor.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram of a display control device in the first embodiment of the present invention, FIG. 2 is a display brain diagram of teletext broadcasting,
FIG. 3 is a display memory map diagram of the display control device according to the embodiment of the present invention, FIG. 4 is a display screen diagram of the display control device according to the embodiment of the present invention, and FIG. 5 is a diagram of the display control device according to the embodiment of the present invention. 6 is a functional block diagram of a display control device according to the second embodiment of the present invention, and FIG. 7 is a functional block diagram of a conventional display control device.
Figure 8 is a display screen diagram of a conventional display control device, Figure 9 is a diagram of a display screen of a conventional display control device.
The figure is a display memory map diagram of a conventional display control device. 2...Display memory section, 3...Display address ordering section, 4...Cursor address generation section,
5...Address switching unit, 6...Data latch unit, 11...Cursor data latch unit, 12...Parallel/serial conversion unit, 17
・・・・・・Cursor parallel/serial converter, 18
...Attribute control section,]9...Foreground color/background color switching section, 20...Cursor color register section, 21...Cursor/background switching section , 22
...timing generation section, 23...second
Cursor color register section, 24... Cursor flashing section, 25... Timer section, 26...
...First cursor color register section. Name of agent: Patent attorney Akira Okaji and two others Figure 12 fFILPll-yivrey->5'-Yuhei 5
Figure 884 page

Claims (2)

[Claims] (1) A display that stores display data including pattern data that indicates a character pattern, foreground color data that specifies the foreground color of characters, background color data that specifies the background color of characters, and attribute data that specifies flashing of characters, etc. a memory section; a display address generating section for generating an address for reading out display data stored in the display memory section in scanning order; and a display address generating section for reading out cursor pattern data stored in the display memory section in scanning order. a cursor address generation section that generates an address; an address switching section that switches between address data from the display address generation section and address data from the cursor address generation section; and a latching display data read from the display memory section. a cursor data latch section that latches the cursor pattern data read out from the display memory section, and a parallel/cursor data latch section that converts the data latched by the data latch section into serial data in accordance with the display timing. a serial converter; a cursor parallel/serial converter that converts the cursor pattern data latched by the cursor data latch into serial data in accordance with the display timing; and pattern data based on the attribute data from the parallel/serial converter. an attribute control unit that performs control such as flashing and outputs the data; a foreground color/background color switching unit that switches between foreground color data and background color data from the parallel/serial conversion unit based on pattern data from the attribute control unit; A cursor color register section that sets the cursor color, and a cursor that outputs a cursor that switches between the output of the foreground color/background color switching section and the output of the cursor color register section based on cursor pattern data from the cursor parallel/serial conversion section. /A display control device comprising a background switching section and a timing generation section that generates address generation timing, latch timing, serial shift timing, etc. (2) The cursor color register section according to claim 1 includes a first cursor color register section that sets one color of a cursor that can set two colors, and a second cursor color register section that sets the other color. a color register section, a cursor flushing section that outputs cursor color data by switching between the output of the first cursor color register section and the output of the second cursor color register section, and a timer section that generates a switching signal for the cursor flushing section. A display control device consisting of: