KR940010238B1 - Apparatus for displaying multi-osds for tv receiver - Google Patents

Abstract

The device comprises the first and the second on-screen signal generating units (1) and (3) which generate a on-screen signal and a blanking signal by the input of a chip selection signal (CS), a strobe (STB), a clock pulse (CLK), and data (DATA), a first analog switching unit (2) which selects an output siganl of the first on-screen signal generator and a tele-text image signal dependent on the existence of the blanking signal, and a second analog switching unit (4) which, on screen, indicates the output signal of the second on-screen signal generating unit and the image signal of the first analog switching unit by the existence of the blanking signal.

Description

TV multi-on-screen display

1 is a block diagram of a conventional on-screen display system.

2 is a signal flow diagram for explaining the operation of FIG.

3 is a schematic diagram of a multi-screen display system of the present invention.

Figure 4 is a diagram illustrating the operation of Figure 3 (a) to (d).

5 is a block diagram of another embodiment of the present invention.

6 is a signal flow diagram illustrating the operation of FIG. 3 and FIG.

* Explanation of symbols for main parts of the drawings

1: first on-screen signal generator 2: first analog switching unit

3: second on-screen signal generator 4: second analog switching unit

30: signal synthesis unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-screen display (OSD), and more particularly to a multi-on-screen display apparatus for quickly displaying multiple combinations of characters or multiple multiple letters on a letter in a system incorporating a character generator. .

As shown in FIG. 1, the conventional on-screen display device receives a chip selection signal CS, a strobe STB, data DATA, and a clock pulse CLK output from a microcomputer in a TV. On-screen signal generator 1 for generating a screen image signal Ro (Go) Bo and a blanking signal BLK, and a blanking signal BLK generated and output from the on-screen signal generator 1 It is composed of an analog switching unit 2 which is switched according to the presence or absence and outputs a teletext video signal Rt (Gt) (Bt) and an on-screen video signal Ro (Go) (Bo).

In this way, in the conventional on-screen display device of the conventional TV configured, the microcomputer initially clears the system, clears the on-screen signal generator 1, and records the desired data. After the desired data has been recorded, the on-screen signal generator (8) switches the teletext video signals Rt (Gt) (Bt) and the on-screen video signals Ro (Go) (Bo), which are character multicast video signals. The chip select signal CS, strobe STB, data DATA, and clock pulse CLK are applied to 1). Accordingly, the on-screen signal generator 1 is driven by the control signal of the microcomputer to generate the on-screen video signal Ro (Go) Bo and the blanking signal BLK, and the blanking signal ( BLK) is input to the analog switching unit 2 to control the switch. That is, when the blanking signal BLK is outputted as a high signal (section with blanking), the movable terminal a of the analog switching unit 2 is connected to its fixed terminal c, and is separated from the on-screen signal generator 1. The generated on-screen video signal Ro (Go) (Bo) is selected, and in the absence of the blanking signal BLK, the movable terminal a of the analog switching unit 2 is connected to its fixed terminal b. Then, the teletext video signal Rt (Gt) (Bt) is selected. The video signal selected from the analog switching unit 2 is input to the color receiver and displayed as characters, figures, and the like.

However, such an on-screen display device of a conventional TV displays a new character or figure by clearing the system and the on-screen signal generator, recording desired data, and then enabling the on-screen signal generator to display on the screen. Such processing time is considerably required, and there is a problem in that it is impossible to display characters and figures to be expressed because it is not a multi-method of displaying a variety of character combinations, that is, another character on the character.

In view of such a conventional problem, the present invention configures the first and second on-screen signal generators in series or in parallel to record different data on each of the on-screen signal generators and display them simultaneously on a screen or to make a time difference. Invented a multi-on-screen display device to display a variety of combinations of characters or multiple characters quickly or independently on a letter by selective display, will now be described in detail with reference to the accompanying drawings of the present invention.

3 is a schematic diagram of a multi-on-screen display system according to the present invention. As shown therein, a chip select signal CS1, a strobe STB, a clock pulse CLK, First on-screen signal generator for receiving on-screen image signals Ro1, Go1, Bo1, and blanking signal BLK1 by receiving data DATA and external vertical synchronization V and horizontal synchronization H; (1) and the chip select signal CS2, the strobe STB, the data DATA, the clock pulse CLK, and the external vertical sync V, and the horizontal sync H output from the microcomputer are input. A second on-screen signal generator 3 for generating a screen signal Ro2 (Go2) Bo2 and a blanking signal BLK2, and a blanking signal BLK1 output from the first on-screen signal generator 1; Teletext video signals Rt (Gt) (Bt) And on-screen video signals The first analog switching unit 2 selectively outputs (Ro1) (Go1) (Bo1) and the blanking signal (BLK2) generated by the second on-screen signal generator (3). 2nd analogue display for selecting the video signal selected by the analog switching unit 2 and the on-screen video signal Ro2 (Go2) (Bo2) to display the selected video signal SR (SG) (SB) on the color receiver; It consists of the switching part 4.

5 is a configuration diagram of another embodiment of the multi-on-screen display system of the present invention, and as shown therein, the chip select signal CS2, the strobe STB, the clock pulse CLK, and the data DATA output from the microcomputer. And a second on-screen signal generator 20 that receives external vertical sync V and horizontal sync H and generates an on-screen video signal Ro2, Go2, Bo2 and a blanking signal BLK2. The chip select signal CS1, the strobe STB, the data DATA, the clock pulse CLK, the second on-screen signal generator 20, the vertical synchronization V, and the horizontal synchronization H are output from the microcomputer. ) Is a first on-screen signal generator 10 for generating an on-screen video signal Ro1 (Go1) Bo1 and a blanking signal BLK1, and the first and second on-screen signal generators ( 10) The oragate OR1 for synthesizing the blanking signals BLK1 and BLK2 output from the 20, and synthesizing and outputting the on-screen video signals Ro1, Go1, Bo1, Ro2, Go2, and Bo2. -OR4) The signal synthesizing unit 30 and the switching unit according to the presence or absence of a blanking signal output from the signal synthesizing unit 30 are connected to the teletext image signals Rt (Gt) (Bt) and the signal synthesizing unit 30. It consists of an analog switching unit 40 which selects a composite video signal and displays the selected video signal SR (SG) (SB) on the color receiver.

In the above, the oscillation input and output terminals OSCI and OSCO of each of the first on-screen signal generators 1 and 10 are commonly connected through the coil L1 and the condenser C1 and C2 to the second on-screen signal. The oscillation input terminal OSCI of the generator 3 and 20 is connected.

The operation and effects of the present invention configured as described above will be described in detail with reference to FIGS. 3 to 6 as follows.

First, in order to record the same letter as the 4a diagram, the microcomputer initially clears the system and then scans the first and second ozone clean signal generators 1 and 10. At this time, if the first on-screen signal generator 1 is turned on, the microcomputer outputs the chip select signal CS1 low to turn off the first on-screen signal generator 1. At this time, when the same data as 4b degree is recorded in the second on-screen signal generator 3, the microcomputer outputs the chip select signal CS2 high and turns the second on-screen signal generator 3 on. Turned on.

Accordingly, the second on-screen signal generator 3 transmits the on-screen video signal Ro2 (Go2) Bo2 of the recorded data, such as 4b, to the external vertical sync V and the horizontal sync H. The synchronous output is performed and the blanking signal BLK2 is made high.

Accordingly, the ON generated by the second on-screen signal generator 3 is switched by the blanking signal BLK2 of the second on-screen signal generator 3 and connected to the fixed terminal c to its movable terminal a. After selecting the screen image signal, the same letter as the fourth degree is displayed on the color receiver.

In addition, the microcomputer clears the first on-screen signal generator 1 and records character data such as 4a. That is, the microcomputer inputs the same data DATA as 4a as 8 bits into the first on-screen signal generator 1 and strobes STB and clock pulses CLK indicating the start and end of the data DATA. Is input to the first on-screen signal generator 1, and the first on-screen signal generator 1 sequentially latches data input from the microcomputer in synchronization with the clock pulse CLK.

In this manner, when all the data such as the fourth fourth degree is recorded, the chip select signal CS1 is set to high, the first on-screen signal generator 1 is turned on, and the switching unit CS2 is set to the second ON. The screen signal generator 3 is turned off. Since the first on-screen signal generator 1 is turned on, the on-screen image signal and the blanking signal BLK1 of the character data such as 4a and the like are outputted to the first analog switching unit 2, and the first analog The switching unit 2 is switched by the input blanking signal BLK1 to select the on-screen image signal Ro1 (Go1) Bo1 of the first on-screen signal generator 1, and the second analog switching unit. 4, the blanking signal BLK2 is not outputted from the second on-screen signal generator 3, so that the on-screen video signal Ro1, Go1, Bo1 selected by the first analog switching unit 2 is not included. Selected to display the same letter 4a degree in the color water pipe.

In addition, in order to display another letter on the screen as shown in FIG. 5C, the microcomputer turns the first and second on-screen signal generators 1 and 3 to high by selecting the chip select signals CS1 and CS2. -Turn it on.

At this time, since the on-screen video signal Ro1 (Go1) Bo1 generated from the first on-screen signal generator 1 is being displayed on the color receiver, the second on-screen signal generator ( The current on-screen video signal Ro2 (Go2) (Bo2) generated from 3) is later displayed in the color receiver via the second analog switching unit 4, so that another character on the character as shown in 4c can be displayed on the screen. Is displayed.

On the other hand, in the multiple on-screen display system of FIG. 5, the microcomputer sets the chip selection signal CS1 (CS2) to high to display the graphics such as the 4d diagram on the screen. And turn on the second on-screen signal generator 20.

Accordingly, the first and second on-screen signal generators 10 and 20 correspond to the on-screen video signals Ro1, Go1, Bo1 (Ro2, Go2, Bo2) of the previously recorded figure or picture data of the microcomputer. The blanking signal BLK1 and BLK2 are input to the signal synthesizing section 30. The OR gates OR1-OR3 of the signal synthesizing unit 30 respectively input the on-screen image signals of the first and second on-screen signal generators 10 and 20 to the analog switching unit 40. The OR gate OR4 synthesizes and outputs the two input blanking signals BLK1 and BLK2. Accordingly, the analog switching unit 40 selects the synthesized on-screen video signal of the signal synthesizing unit 30 by the signal generation unit synthesized by the OR gate OR4 to display a screen such as a 4d diagram on the color receiver. do.

That is, the on-screen image signals of the first and second on-screen signal generators 10 and 20 may be combined in the signal synthesizing unit 30 to be represented as a fourth diagram. In other words, any font may be combined with the figure of the figure. By using this, a moving object display of a moving type can also be realized very realistically. As an example, the output on-screen image signal of the first on-screen signal generator 10 is displayed on the screen at the coordinates X and Y. The on-screen video signal of the second on-screen signal generator 20 is displayed on the screen at the + 2 * Y position, and then the output video signal of the first on-screen signal generator 10 is displayed at the X + 2 * Y position. Then, when the output video signal of the second on-screen signal generator 20 is displayed at the position of X + 3 * Y, the object is moved as if the object or font is moved from the left to the right of the screen near the real time. Done.

As described in detail above, the present invention configures the first and second on-screen signal generators in series or in parallel to record different data on each of the on-screen signal generators for simultaneous display on the screen or to select a time difference. By displaying it, it is possible to quickly display multiple combinations of characters or multiple letters on the letter independently or on multiple letters.

Claims (5)

On-screen video signal and blanking signal (BLK) by receiving the microcomputer chip select signal CS1, strobe STB, clock pulse CLK, data DATA, and external vertical sync V and horizontal sync H Teletext image signal depending on whether or not the first and second on-screen signal generators 1 and 3 that generate the ") and the blanking signal BLK of the first on-screen signal generator 1 are output. And first on-screen signal The first analog switching unit 2 for selecting the output signal of the generator 1 and the first analog switching unit 2 according to the blanking signal presence or absence of the second on-screen signal generator 3 are selected. And a second analog switching unit (4) which selects an image signal and an output signal of the second on-screen signal generator (3) and displays them on the screen. The oscillation input and output terminal (OSCI) (OSCO) of the first on-screen signal generator 1 is connected to the oscillation input terminal (OSCI) of the second on-screen signal generator (3). A multiple on-screen display device of a TV, characterized by inputting external vertical and horizontal synchronization (V) (H) in parallel. On-screen video signal and blanking signal (BLK) by receiving the chip select signal (CS), strobe (STB), clock pulse (CLK), data (DATA) and external vertical (V), horizontal (H) ) Synthesizes the blanking signals of the first and second on-screen signal generators 10 and 20 and the first and second on-screen signal generators 10 and 20 to generate an on-screen image signal. Analog switching to select and display the teletext video signal and the composite video signal of the signal synthesizing unit 30 on the screen according to the signal synthesizing unit 30 to be synthesized and the blanking signal of the signal synthesizing unit 30. A multiple on-screen display device of a TV comprising a section (40). 4. The apparatus of claim 3, wherein the signal synthesizing unit (30) comprises an oragate (OR1-OR4). 4. The multiple on-screen display of a TV according to claim 3, wherein external vertical and horizontal synchronization (V) (H) are supplied in series to the first and second on-screen signal generators (10) (20). Device.