KR19990027731U - Device that automatically controls screen position on HDTV monitor - Google Patents

Abstract

The present invention relates to a device for automatically controlling the position of a screen in an HDTV monitor, and to a device for controlling the size of a screen displayed on a monitor to be always constant by supplementing a video time and a blanking time which are different from a same HDTV signal. . According to the present invention, when the HDTV signal having different video time and blanking time is input, the A / D conversion unit performs a digital signal conversion process to convert the digital data code into two blank time determination units for detecting the blanking time. The two blank time determination units generate an output pulse for detecting the blanking time corresponding to the horizontal synchronous signal and the vertical synchronous signal, respectively, and apply the generated pulses to the microcomputer. Therefore, the microcomputer that has received this control applies a horizontal control signal and a vertical control signal to the deflection unit to compensate for the difference compared to the standard HDTV signal standard, thereby controlling the deflection output of the deflection unit, thereby providing a constant size and position. A device for automatically controlling the position of a screen in an HDTV monitor for displaying a HDTV video screen is proposed.

Description

Device that automatically controls the screen position on the HDTV monitor

The present invention relates to a device for automatically controlling the position of a screen in an HDTV monitor, and to a device for controlling the size of a screen displayed on a monitor to be always constant by supplementing a video time and a blanking time which are different from a same HDTV signal. .

In general, HDTV (High Definition Television) is a next-generation television that can display high-definition images in high-definition on a large screen, and can exhibit a high visual psychological effect such as a sense of position and force far exceeding the current television. As a television system, the scanning line is 1125 lines and the aspect ratio of the screen is 16: 9, which is 25% longer than the current television, and the number of pixels per frame is about five times that of a fine image. Image quality is not deteriorated.

In addition, when looking at the frequency band of the HDTV, the conventional NTSC system uses a frequency multiplexing scheme to put all signals in the 6MHz channel band, whereas in the HDTV system, the frequency band of the luminance signal is five times higher than that of the NTSC system. Since it is ideal (22MHz), in order to put all the signals in the 27MHz channel band of satellite broadcasting, the time division multiplexing method which separates the luminance signal (22MHz), the color signal RY (7MHz), and BY (7MHz) and time-compresses all. That is, when the luminance signal and the color signal are combined, the frequency band becomes 36 MHz, and thus two channels are required to transmit all the HDTV signals of the FM transmission, and thus band compression is performed to use the 27 MHz satellite broadcasting channel.

In addition, the viewing distance of the HDTV is three times the length of the screen, whereas the NTSC television is seven times the distance of the NTSC system with less scantler. Large screens can be used in living rooms that are not so spacious. In addition, since the screen is enlarged and the horizontal length is longer, the time of view is NTSC system is 10 ° while the HDTV method is 30 °, which greatly improves the viewing experience. The monitor of the HDTV is capable of executing a multimedia environment. As well as watching television broadcast programs, various video inputs corresponding to multimedia such as computer monitors and CD displayers are processed, thereby providing convenience.

However, when the HDTV signal having the same high definition image and the HDTV signal having different time, front porch, back porch time and blanking time are displayed on one monitor, the screen may be displayed due to the difference. There is a problem that the size and position of the display differently.

Accordingly, the present invention has been devised to solve the above problems, and an object of the present invention is to provide horizontal blanking when HDTV signals having different time, front porch and back porch time, and blanking time are input. Time and vertical blanking time are detected, and the microcomputer receiving this is compared with the reference format of the HDTV signal, and then the size and position of the screen generated by the difference is controlled to be compensated, thereby increasing the size of the screen displayed on the monitor. An object of the present invention is to provide an apparatus for automatically controlling the position of a screen in an HDTV monitor that is always constant.

1 is a block diagram showing an apparatus for automatically controlling the position of the screen in the HDTV monitor according to the present invention.

Figure 2 is a flow chart for explaining an apparatus for automatically controlling the position of the screen in the HDTV monitor of the present invention.

<Description of the symbols for the main parts of the drawings>

100: video signal input unit 200: A / D conversion unit

300: first blank time determination unit 400: second blank time determination unit

500: microcomputer 600: deflection unit

700: HDTV Monitor

Hereinafter will be described in detail with reference to the accompanying drawings the configuration and operation of the embodiment for achieving the above object of the present invention.

1 is a block diagram showing an apparatus for automatically controlling the position of the screen in the HDTV monitor according to the present invention.

Referring to FIG. 1, the present invention provides an image signal input unit 100 for supplying various HDTV signals, an A / D converter 200 for digitally converting an HDTV signal output from the image signal input unit 100, and The first blank time determination unit 300 and the second blank time determination unit generating an output pulse for detecting the horizontal blanking time and the vertical blanking time from the digital HDTV signal converted and output by the A / D converter 200. 400,

The microcomputer 500 for outputting a control signal by comparing the output pulses applied by the first blank time determination unit 300 and the second blank time determination unit 400 with the standard HDTV signal specification, and the microcomputer 500. It is composed of a deflection unit 600 for receiving a control signal of the deflection output to the HDTV monitor (700).

Hereinafter, the operation according to an embodiment of the present invention made as described above will be described in detail.

First, in the video signal input unit 100, various HDTV signals are input and output to the A / D converter 200, and the A / D converter 200 converts the HDTV signals into digital data codes. The first blank time determination unit 300 and the second blank time determination unit 400 are output to the second blank time determination unit 400.

The first blank time determining unit 300 detects a horizontal blanking time corresponding to a horizontal synchronous signal without a video signal from the HDTV signal converted into a digital data code, and outputs a high output pulse indicating the time. It is generated and applied to the microcomputer 500.

Similarly, the second blank time determination unit 500 detects a vertical blanking time corresponding to a vertical synchronous signal without a video signal in the HDTV signal converted into a digital data code and displays the time. Generate and apply to the microcomputer 500.

That is, the microcomputer 500 receives the respective output pulses supplied from the first blank time determining unit 300 and the second blank time determining unit 400 and compares them with the reference format of the pre-stored HDTV signal. When the HDTV signal is displayed, the horizontal position and size control signals and the vertical position and size control signals for correcting the horizontal position and size and the vertical position and size of the screen are applied to the deflection unit 600.

Therefore, the deflection unit 600 receives a horizontal position and a magnitude control signal and a vertical position and the magnitude control signal from the microcomputer 500 to deflect the HDTV monitor 700 so as to realize a normal HDTV signal image.

2 is a flowchart illustrating an apparatus for automatically controlling the position of a screen in the HDTV monitor according to the present invention, and includes a video signal input step S10 to which various HDTV signals are input and a video signal input step S10. A / D conversion step (S20) in which coarse HDTV signal is digitally converted, and first blank time determination for generating an output pulse for detecting a horizontal blanking time in the digital HDTV signal converted through the A / D conversion step (S20). A second blank time determination step (S40) of generating an output pulse of detecting a vertical blanking time from the digital HDTV signal converted through the step S30 and the A / D conversion step (S20);

The microcomputer application step (S50) and the microcomputer application step (S50), respectively, in which the output pulses generated in the first blank time determination step (S30) and the second blank time determination step (S40) are applied to the microcomputer 500, respectively. The deflection output is controlled through the deflector control step (S60) and the deflector control step (S60), in which the deflection output of the deflection unit 600 is controlled by the microcomputer 500 having determined the output signal of the control unit. If the blanking time is not detected in the screen output step (S70), the first blank time determination step (S30) and the second blank time determination step (S40), the input of the HDTV signal is repeated. A video signal input step S10 is executed.

Hereinafter, with reference to the accompanying drawings will be described the operation after the A / D conversion step (S20).

First, the HDTV signal output from the video signal input unit 100 is converted into a digital data code by the A / D converter 200 to be transmitted to the first blank time determination unit 300 and the second blank time determination unit 400. The first blank time determination unit 300 generates a high (H) output pulse that detects the blank time of the horizontal synchronization signal from the HDTV signal converted into the digital data code, and applies the generated high (H) pulse to the microcomputer 500.

Similarly, the second blank time determining unit 400 receiving the HDTV signal converted into the digital data code from the A / D conversion unit 200 detects the blank time of the vertical synchronization signal and outputs a high (H) pulse. Generate and apply to the microcomputer 500.

In addition, the microcomputer 500, which receives the respective output pulses from the first blank time determining unit 300 and the second blank time determining unit 400, compares with the reference standard of the pre-stored HDTV signal and finds the difference. Thereafter, the horizontal control signal and the vertical control signal to compensate for the above difference is applied to the deflector 600.

Therefore, the deflection unit 600 performs deflection output according to the horizontal control signal and the vertical control signal of the microcomputer 500, so that the size of the output screen generated due to the difference in the blanking time and the video time of the same HDTV signal. And by eliminating the difference between the position so that a constant screen is always output.

As described above, in the present invention, when an HDTV signal having a different video time and blanking time is input, the A / D converter performs a digital signal conversion to convert the digital data code into two blank times for detecting the blanking time. The two blank time determination units generate an output pulse that detects the blanking time corresponding to the horizontal synchronous signal and the vertical synchronous signal, respectively, and apply the output pulses to the microcomputer. By applying the horizontal control signal and the vertical control signal to the deflection part to compensate for the difference compared to the specification of the HDTV signal to control the deflection output of the deflection part, so that the HDTV image screen having a constant size and position is always displayed. There is.

Claims (1)

In the HDTV monitor that complements and displays the HDTV signal having a difference from the standard, Two blank time determination means for outputting a pulse detected by the blanking time in the HDTV signal digitally converted by the A / D conversion means; And a control means for controlling the deflection output of the deflection means after receiving the respective output pulses from the two blank time determination means, comparing them with the reference standard of the HDTV signal, and automatically adjusting the position of the screen in the HDTV monitor. Controlling device.