KR19990003973A - Background color changing device of PDP-TV - Google Patents

Abstract

The present invention relates to a background color changing apparatus of a PDP-TV, and more particularly, when displaying a video signal having a 4: 3 aspect ratio in a wide screen having a 16: 9 aspect ratio, there is no image information. Background Art [0002] A background color changing apparatus of a PDP-TV is disclosed, which allows a viewer to select a desired background color for a live signal and to view a lively screen. According to the present invention, when a viewer views a television having background color information, the viewer converts the image to a 4: 3 aspect ratio from a wide screen of 16: 9 and views it, the video screen is provided by data addressing for 80 image information in 107 addressing sections. Implement On the other hand, in the no-signal area on both sides without image information, the clock is divided into two halves, and the background color of the microcomputer is input by inputting the background color of the microcomputer applied through the remote controller during the 13th clock and the 14th clock period. It has the effect of assigning the background color to the screen, and also displays the background color when watching television by converting from 16: 9 screen to 4: 3 aspect ratio.

Description

An apparatus for changing ground color of PDP-TV

The present invention relates to a background color changing apparatus of a PDP-TV, and more particularly, when displaying a video signal having a 4: 3 aspect ratio in a wide screen having a 16: 9 aspect ratio, there is no image information. The present invention relates to a background color changing apparatus of a PDP-TV that allows a viewer to select a desired color and to view a lively screen.

In general, a television receives a broadcast signal transmitted from each broadcasting station through an antenna so that a broadcast corresponding to a screen is displayed. An image of an object photographed by a camera at the broadcasting station is converted into an image signal, and the image signal is a constant high frequency signal. It transmits through a transmit antenna. The high frequency transmitted through the transmitting antenna is received through a receiving antenna installed in each home and applied to the television. The high frequency received by the television is converted into a predetermined frequency through a tuner circuit, and then divided into an image signal and an audio signal, and after a predetermined step, the image signal is displayed on the screen, and the audio signal is output through a speaker. In this case, when the user changes the screen resolution from 853 × 480 to 640 × 480, a colorless signal is displayed on the part without image information of both screens.

3 is a block diagram of conventional background signal processing.

As shown in FIG. 3, a microcomputer 120 for receiving a signal converted from a wide screen of 16: 9 to a 4: 3 aspect ratio through a remote controller (not shown) and a line clock signal based on the system of the present invention. The timing generator 110 outputs the CLOCK_480 and the reference clock signal CLOCK, and is connected to the microcomputer 120 and the timing generator 110, and outputs the signals of the timing generator 110 and the microcomputer 120. A read address generator 90 connected to the controller 100 and outputting a read address for the clock_scan signal output from the controller 100, and the read address generator; And a memory unit 80 for inputting address information output from the read address generating unit 90 and outputting corresponding data, and a memory unit 80 and a control unit 100. Data output from the memory unit 80 and output from the control unit 100 By which the blank is made as an input signal to the multiplexer for separating each of the video signal and blank signal.

Meanwhile, referring to the operation of the conventional background color screen processing having the above configuration, first, when the viewer selects the 4: 3 aspect ratio from the wide screen of 16: 9 by the remote controller, the signal transmitted from the remote controller is the interrupt port of the microcomputer. Is received via. The output signal of the remote controller received by the microcomputer checks the length of the pulse by the internal timer of the microcomputer to distinguish data. In addition, the timing generator 110 of the system outputs a line clock signal CLOCK_480 and a reference clock signal CLOCK based on the system of the related art. The control unit 100 which receives the line clock signal CLOCK_480, the reference clock signal CLO CK, and the output signal of the microcomputer, which are output from the timing generator 110, receives a clock_scan signal and an image of the screen image information. The signals are separated and output as blank signals for display in the no-signal area without information. The read address generator 90, which receives the clock scan signal output from the control block unit, outputs address data based on the clock scan signal. The memory unit 80 that receives the address information output from the read address generator 90 outputs data about image information corresponding to the address. Data about the image information output from the memory unit 80 is input to the multiplexer 130, the multiplexer 130 is output to the output data of the memory unit 80 and the control unit 100 in the no signal area without the image information The blank signal to be sent is separated and output.

Therefore, in the conventional background image processing apparatus configured as described above, only a black color is displayed due to a blank signal being sent to a non-signal area without image information, and a color cannot be inserted, so that a live screen reproduction cannot be performed. There was a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to specify 16 colors in a color table in a ROM (Read Only Memory), and a viewer may display 4: 3 in a 16: 9 wide screen. In case of viewing by converting to the aspect ratio of PDP-TV, the background color changing device can watch a lively screen by selecting and displaying the desired color from the color specified in the color table through the remote controller in the no-signal part.

1 is a block diagram of a background color changing apparatus of a screen according to the present invention;

FIG. 2 is a waveform diagram of a data clock for changing the background color of the screen shown in FIG. 1; FIG.

3 is a block diagram of a background signal processing of the prior art;

* Explanation of symbols for the main parts of the drawings

10 memory unit 20 read address generating unit

30: control unit 40: color table

50: timing generator 60: microcomputer

70: multiplexer

The present invention for achieving the above object, the microcomputer for receiving a table designation signal transmitted from the remote control via the interrupt port of the microcomputer,

A timing generator for generating a timing signal based on the system of the present invention,

A control unit connected to the microcomputer and the timing generator and receiving table information on the background color signal displayed in the non-signal area output from the microcomputer, the line clock signal CLOCK_480 and the reference clock signal CLOCK of the timing generator;

A read address generator which is connected to the controller and receives a clock_scan signal output from the controller;

A memory unit connected to the read address generator and receiving an address based on a clock_scan signal;

A color connected to the control unit and receiving a table designation signal having 16 background color information consisting of 4 bits output from the control unit and an address signal ADD_A providing address information specified in the 16 color signals included in each table. Table section, and

Provided is a background color changing apparatus of a PDP-TV connected to the memory unit and the color table unit, and comprising a multiplexer separating the 24-bit image information output from the memory unit and a valid signal for the background color received from the color table unit.

According to the present invention, when a viewer views a PDP television having a background color changing function and converts it to a 4: 3 aspect ratio from a wide screen of 16: 9, the signalless area on both sides without image information is displayed. The viewer selects the desired background color through the button control unit of the remote controller. The function of converting the viewer to a 4: 3 aspect ratio from a 16: 9 wide screen having a resolution of 853 x 480 can also be operated by a button operation unit (not shown) of the remote controller. As described above, the background color signal selected by the remote controller may be output from the color table and displayed in the non-signal area without image information.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

1 is a block diagram schematically illustrating an apparatus for changing a background color of a screen according to the present invention.

Referring to FIG. 1, the microcomputer 60 receives a background color signal consisting of 4 bits of a non-signal area selected by a remote controller (not shown) from the interrupt port of the microcomputer to determine an operation corresponding to a key signal of the remote controller, and to perform a corresponding operation. Control to perform. In addition, the timing generator 50 outputs a line clock signal CLOCK_480 and a reference clock signal CLOCK by the background color changing system of the present invention.

The control unit 30 connected to the microcomputer 60 and the timing generator 50 includes a 4-bit background color signal applied from the microcomputer, a line clock signal CLOCK_480 and a reference clock signal applied from the timing generator 50. CLOCK) as an input to control the appropriate signal for the background signal.

The read address generator 20 connected to the controller 30 generates a read address based on the clock_scan signal by applying a clock_scan signal output from the controller.

The memory unit connected to the read address generator 20 receives the address information of the video signal output from the read address generator 20 and outputs data based on the address information.

The color table 40 connected to the control unit 30 designates 4 bits, or 16 background color signals, in a memory having a storage function such as a read only memory (ROM), and output information for the corresponding background color is applied. When the background color is printed.

The multiplexer 70 connected to the memory unit 10 and the color table 40 separates and outputs the data output from the memory unit 10 and the background color signal output from the color table 40. Data output from the multiplexer unit 70 is applied to an interface terminal (not shown).

2 is a diagram of a waveform diagram of a data clock for changing a background color of a screen.

Referring to FIG. 2, it is assumed that a 16: 9 wide screen having a resolution of 853 × 480 is converted to a 4: 3 aspect ratio (that is, a resolution of 640 × 480). In addition, FIG. 2 describes only one line scan assuming that one frame data of 640 × 480 is stored in the memory when changing from 16: 9 aspect ratio to 4: 3 aspect ratio. .

The clock signal for the 480 lines output from the timing generator 50, that is, the line clock signal CLOCK_480 has a high section in which 150 clocks are generated and a low section in which 150 clocks are generated. During the 150 clock periods of the high signal, 107 addressing is performed using a resolution of 853 × 480. On the other hand, when switching from 16: 9 aspect ratio to 4: 3 aspect ratio (640x480 resolution), the effective data scan section reads 80 image information during 107 addressing intervals for 16: 9. It can be classified into addressing of 27 clock sections which display a background color in an unsignaled area where there is no image information on both sides of the screen. Therefore, the clock scan signal and the blank signal are applied when the / Data_Valid signal is low in the high section of the first line of the line clock signal CLOCK_480. The clock scan signal loads image information with a resolution of 640 x 480 for 80 clock periods in 107 addressings, and the background color signal applied to the blank signal has 13 clock periods and 14 clocks considering both screens. It is divided into intervals. Therefore, the background color of the screen can be displayed through 13 addressings for 13 clock periods and 14 addressings for 14 clock periods.

As can be seen from the above description, the present invention provides both non-image information when a viewer converts to a 4: 3 aspect ratio on a 16: 9 wide screen while watching a television with background color information. By displaying the background color according to the background color information of the microcomputer applied through the remote controller in the signal area, it is possible to watch a more vivid screen.

Claims (3)

In a PDP-TV having a background color signal, a timing generator (50) for generating a microcomputer (60), a line clock signal (CLOCK_480), and a reference clock signal (CLOCK) for receiving a pulse signal transmitted from a remote controller at an interrupt port. ), The 4-bit color table designation signal from the microcomputer 60 and the line clock signal CLOCK_480 and the reference clock signal are received from the timing generator 50 to receive the clock_scan signal and the address signal ADD_A. ), A read address generator 20 that receives the clock_scan signal of the controller 30 to generate read address information, and a read address signal received from the read address generator 20. A memory unit 10 for outputting corresponding data by using a color table, a color table 40 for generating 24-bit address information by the address signal ADD_A of the controller 30, and the memory unit ( 10. A background color changing apparatus for a PDP-TV, comprising a multiplexer (70) for separating and outputting a signal for 24 bits of image information received from 10) and a background color signal received from a color table. The PDP of claim 1, wherein the color table 40 receives an address signal ADD_A that provides an address of a table having a 4-bit table designation signal and a background color information applied from the controller 30. -TV background color changing device. 2. The controller 30 of claim 1, wherein the controller 30 activates the / Data_Valid signal for the image information on the 16: 9 screen in the low period during the high period of the first line of the line clock signal CLOCK_480, and in the clock_scan signal. It reads 4: 3 image information for 80 clock periods, and also outputs a 4-bit background color table designation signal for the background color signal applied from the microcomputer 60 and ADD_A providing an address for the background color table. The background color changing device of the PDP-TV.