KR19990009938A - Multiscreen television with two video screens in multiscreen mode - Google Patents

Abstract

The multi-screen has two video screens in the multi-screen mode so that a moving screen can be displayed on one side of the main screen while the multi-screen television is selected. Television is disclosed. When the viewer selects the television having the PIP function in the multi-screen mode, the multi-screen is displayed on the screen. In the multi-screen mode, a video or a game device input from an external input terminal is separately displayed on one side of the main screen to view a sub-screen, and an operation signal is applied from the remote controller to the microcomputer through the signal receiver of the television. The microcomputer applies an image signal from an external input terminal to a switching unit and a PIP signal processing unit when an operation signal is applied from a remote controller, and the PIP signal processing unit uses an OSD blanking signal to the main image signal demodulation unit by a signal applied from the microcomputer. At the same time, the video signal applied from the external input terminal is applied to the main video signal demodulation unit through the switching unit. The main video signal can be separately displayed on one side of the main screen under the control of the microcomputer and the video signal applied from the external input terminal can be displayed separately while the viewer can enjoy the video or game machine separately. .

Description

Multiscreen television with two video screens in multiscreen mode

The present invention relates to a multi-screen television, and more particularly, when a television having a picture in picture function is in a multi-screen mode, a moving screen is displayed on one side of the main screen. The present invention relates to a multi-screen television having two video screens in a multi-screen mode that enables a user to watch a signal input from an external device.

In general, a television receives a broadcast signal transmitted from each broadcasting station through an antenna to display a broadcast corresponding to a screen. The video of an object photographed by a camera at the broadcasting station is converted into a video signal, and the video signal is a constant high frequency signal. It transmits through a transmit antenna. The high frequency signal transmitted through the transmitting antenna is received through a receiving antenna installed in each home and applied to the television. The high frequency signal received by the television is converted to a predetermined intermediate frequency through a tuner circuit unit, and then amplified into a signal having a constant size in the intermediate frequency amplification unit, and the image signal and audio signal detection unit detects the video signal and the audio signal, respectively. After the step, the video signal is applied to the screen of the receiving tube through the demodulation circuit and displayed, and the audio signal is output through the speaker. In this case, when the user selects a broadcast channel to receive through a television using a channel conversion switch, a program of a corresponding broadcasting station is displayed on the screen.

When the multi-screen function is adopted in the television having the above function, the main screen and a plurality of sub-screens (PIP) are displayed on the screen of the television. A separate video signal processing system is installed for the main screen and the sub screen, respectively. That is, a main tuner circuit portion for receiving a main video signal displayed on the main screen is provided, and a sub tuner circuit portion for receiving sub video signals displayed on the sub screen is provided, and the main tuner circuit portion and the plurality of sub tuner circuit portions are broadcasted. It is connected to one antenna for receiving a high frequency signal which is a video signal and simultaneously receives all high frequency signals. Therefore, in order to display the sub-screens overlapped with a part of the main screen, a tuner circuit part for a separate sub-screen is installed so that the main screen is not output in the PIP area where the sub-screen is displayed, and the sub-screen is outputted. do.

1 is a block diagram schematically showing an operation of a television having a general PIP function.

Referring to FIG. 1, a main tuner circuit unit which selects a high frequency signal corresponding to a channel to be displayed on a main screen from among high frequency signals received through an antenna 24, converts it into an intermediate frequency, and then amplifies and generates a composite video signal. 10; A main video signal processing unit 12 controlling to display the composite video signal applied from the main tuner circuit unit 10 on the screen 22; A sub-tuner circuit unit 14 for selecting a high-frequency signal corresponding to a channel to be displayed on a sub-screen among the high-frequency signals received through the antenna 24, amplifying it to an intermediate frequency, and generating a composite video signal through a series of processes; A PIP control unit 18 connected to the sub-tuner circuit unit 14 for selecting and generating a composite video signal applied from the sub-tuner circuit unit 14 by a PIP function; A switching unit 16 connected between the main video signal processing unit 12 and the PIP control unit 18 and controlling a transmission path of signals transmitted between the main video signal processing unit 12 and the PIP control unit 18; And a signal applied from an external button unit (not shown) connected to the main tuner circuit unit 10, the sub tuner circuit unit 14, the main video signal processing unit 12, the PIP control unit 18, and the switching unit 16. According to the microcomputer 20 to control each operation.

In the television having the PIP function, the microcomputer 20 recognizes this when the viewer selects a multi screen using the screen selection button of the button while watching a broadcast program using the television having the PIP function. The multi-screen signal is popular, the main video signal processor 12 applies an OSD blanking signal corresponding to the number of multi-screens, and the main video signal applied through the main tuner circuit 10 to the switching unit 16. Is blocked so that only the signal applied from the PIP control unit 18 is applied to the main video signal processing unit 12. The main image signal processing unit 12 displays the OSD screen on the screen 22 by the OSD blanking signal applied from the microcomputer 20, and the switching unit 16 is a multi-screen image applied from the PIP control unit 18 Since all the signals are applied to the main video signal processor 12, the main video signal processor 12 blocks the main video signal applied from the main tuner circuit 10 and blocks the video signal from the PIP controller 18 on the OSD screen. Display. Therefore, the full screen (CRT) 22 displays the multi-screen selected by the viewer.

It is inconvenient to display on different sub screens because there is no device that can be viewed separately by connecting external devices such as video and game devices to the external input terminal while displaying multiple screens at the same time by using the multi screen television having the above functions. There is a ham.

The present invention has been made to solve the above problems, an object of the present invention is a video screen moving the image on one side of the main screen when the TV having a picture in picture (multi-screen mode) The present invention provides a multi-screen television having two video screens in a multi-screen mode in which a signal input from an external device can be viewed by being displayed.

1 is a block diagram schematically showing an operation of a television having a general PIP function.

2 is a block diagram schematically illustrating a multi-screen television having two video screens according to the present invention.

3 is a diagram illustrating an embodiment in which two video screens are displayed according to the present invention.

Explanation of symbols on the main parts of the drawing

50: main tuner circuit 52: sub-tuner circuit

54: main video signal demodulator 56: switching unit

58: PIP signal processing unit 60: water pipe drive

62: external input terminal 64: external device

66: antenna 68: screen

70: micom 72: sub screen

74: main screen 76: move sub screen

80: remote controller

In order to achieve the above object, the present invention includes a main tuner circuit unit for converting and amplifying a video signal of a selected channel to an intermediate frequency, which is easy to amplify, for display on a main screen among high frequency signals received through an antenna; A main video signal demodulator for detecting and demodulating a video signal from an intermediate frequency applied from the main tuner circuit and outputting the video signal to a water pipe drive; A sub-tuner circuit unit for selecting a high-frequency signal received through an antenna, converting and amplifying the intermediate frequency into an intermediate frequency, and detecting an image signal from the intermediate frequency so that the image signal is displayed on a sub-screen displayed on the screen of the receiving tube; A switching unit connected to the main tuner circuit unit and an external device, for switching the image signals applied from the main tuner circuit unit and the external device and applying the main image signal demodulation unit and the PIP signal processing unit; A PIP signal processing unit connected to the sub-tuner circuit unit and the switching unit and applying a video signal applied from the sub-tuner circuit unit and the switching unit to the main video signal demodulation unit through the switching unit; The controller is connected to the switching unit, the PIP signal processor, and the main video signal demodulator. When an external device input signal is applied from the remote controller in the multi-screen mode, the controller controls the switching unit, the PIP signal processor, and the main video signal demodulator. Provided is a multi-screen television having two video screens in a multi-screen mode consisting of a microcomputer for displaying a signal on a move screen.

According to the present invention, when a viewer selects a television having a PIP function in a multi-screen mode, two to thirteen screens are displayed on the screen. In the multi-screen mode, a video or a game device input from an external input terminal is separately displayed on one side of the main screen to view a sub-screen, and an operation signal is applied from the remote controller to the microcomputer through the signal receiver of the television. The microcomputer applies an image signal from an external input terminal to a switching unit and a PIP signal processing unit when an operation signal is applied from a remote controller, and the PIP signal processing unit uses an OSD blanking signal to the main image signal demodulation unit by a signal applied from the microcomputer. At the same time, the video signal applied from the external input terminal is applied to the main video signal demodulation unit through the switching unit. The main video signal can be separately displayed on one side of the main screen under the control of the microcomputer and the video signal applied from the external input terminal can be displayed separately while the viewer can enjoy the video or game machine separately. .

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

2 is a block diagram schematically illustrating a multi-screen television having two video screens according to the present invention.

3 is a diagram illustrating an embodiment in which two video screens are displayed according to the present invention.

Referring to FIG. 2 and FIG. 3, a multi-screen television having two video screens, the high frequency signal received through the antenna 66 is converted and amplified by the main tuner circuit unit 50 into an intermediate frequency and displayed on the main screen. Done. The intermediate frequency amplified by the main tuner circuit 50 is detected and demodulated by the main video signal demodulator 54, and then applied to the water pipe drive 60 to be displayed on the screen (CRT) 68. In addition, the high-frequency signal received through the antenna 66 is applied to the sub-tuner circuit unit 52, the sub-tuner circuit unit 52 converts and amplifies the high-frequency signal to an intermediate frequency and then detects an image signal from the intermediate frequency. The video signal is displayed on the sub screen displayed on the screen of the screen 68. A switching unit 56 is connected to the main tuner circuit unit 50 and the external device 64, and the switching unit 56 is connected to the external device 64 through the main tuner circuit unit 50 and the external input terminal 62. The video signal applied from the switch is applied to the main video signal demodulator 54 and the PIP signal processor 58. A PIP signal processor 58 is connected to the sub-tuner circuit 52 and the switching unit 56, and the PIP signal processor 58 receives an image signal applied from the sub-tuner circuit 52 and the switching unit 56. The signal is applied to the main video signal demodulator 54 through the switching unit 56 again. The microcomputer 70 is connected to the switching unit 56, the PIP signal processing unit 58, and the main video signal demodulation unit 54, and the microcomputer 70 is connected to the external device from the remote controller 80 in a multi-screen mode. When the operation signal is applied, the control unit 56 controls the switching unit 56, the PIP signal processing unit 58, and the main image signal demodulation unit 54 so that the video signal input from the external device 64 is moved to the sub-screen 72. Will be displayed on the screen.

According to the present invention, when the viewer selects the multi-screen mode while watching the multi-screen television, the microcomputer 70 applies a signal corresponding to the multi-screen mode to the switching unit 56, and the switching unit 56 Applies a main video signal applied from the main tuner circuit unit 50 to the PIP signal processing unit 58. When the PIP signal processor 58 receives a signal corresponding to a multi-screen mode (eg, 13 screens) from the microcomputer 70, the PIP signal processor 58 supplies an OSD blanking signal corresponding to a multi-screen (13 screens) to the main video signal demodulator 54. The main image signal applied from the switching unit 56 and the sub image signal applied from the sub tuner circuit unit 52 are applied to the switching unit 56. The switching unit 56 applies the main image signal and the sub image signal applied from the PIP signal processing unit 58 to the main image signal demodulation unit 54, and the main image signal demodulation unit 54 is the PIP signal processing unit 58. By applying the OSD blanking signal to the water pipe drive 60 according to the OSD blanking signal applied from), a multi-screen (eg, 13 screens) corresponding to the OSD blanking signal is displayed on the screen 68. In addition, the main video signal demodulator 54 may display the main video signal and the sub video signal applied through the switching unit 56 and the 12 sub screens 72 and 1 displayed on the screen 68 through the water pipe drive 60. It is displayed on a multi-screen consisting of four main screen (74).

That is, the main screen signal received through the main tuner circuit unit 50 is composed of one main screen 74 and twelve sub screens 72. The sub image signals received on the main screen 74 and received through the sub tuner circuit 52 are displayed on the 12 sub screens 72. The sub-picture signals selected by the microcomputer 70 are displayed on the 12 sub-screens.

In the state where 13 multi-screens composed of one main screen 74 and 12 sub-screens 72 are displayed on the screen 68, the viewer views the external device 64 using the remote controller 80. When the operation signal is applied to the microcomputer 70 through a signal receiver (not shown) of the television, the microcomputer 70 applies a switching signal to the switching unit 56, and the OSD blanking signal to the PIP signal processing unit 58. do. When the switching signal is applied from the microcomputer 70, the switching unit 56 applies an image signal of the external device 64 applied through the external input terminal 62 to the PIP signal processing unit 58. The PIP signal processor 58 applies the OSD blanking signal from the microcomputer 70 to the main video signal demodulator 54 and simultaneously switches the video signal of the external device 64 through the switch 56. It is applied to the main video signal demodulation unit 54 through the unit 56. The main video signal demodulator 54 provides a separate move sub-screen 76 on one side of the main screen 74 among the multi-screens displayed on the screen 68 by the OSD blanking signal applied from the PIP signal processor 58. In addition, the moving sub-screen 76 displays an image signal of the external device 64 applied through the switching unit 56. Since the video signal of the external device 64 displayed on the move sub-screen 76 is displayed as a video, the viewer can enjoy a separate game and video while watching the multi-screen.

As can be seen from the above description, the present invention separately displays a sub-screen on one side of a main screen of a video or game device input from an external input terminal while the viewer selects and watches a multi-screen television in a multi-screen mode. In the case of watching the video, the operation signal is applied from the remote controller to the microcomputer through the signal receiver of the television. The microcomputer applies an image signal from an external input terminal to a switching unit and a PIP signal processing unit when an operation signal is applied from a remote controller, and the PIP signal processing unit uses an OSD blanking signal to the main image signal demodulation unit by a signal applied from the microcomputer. At the same time, the video signal applied from the external input terminal is applied to the main video signal demodulation unit through the switching unit. The main video signal can be separately displayed on one side of the main screen under the control of the microcomputer and the video signal applied from the external input terminal can be displayed separately while the viewer can enjoy the video or game machine separately. .

Claims (4)

A main tuner circuit unit 50 for converting and amplifying a video signal of a selected channel into an intermediate frequency which is easy to amplify for display on a main screen 74 among high frequency signals received through the antenna 66; A main video signal demodulator 54 for detecting and demodulating the video signal from an intermediate frequency applied by the main tuner circuit unit 50 and outputting the video signal to the water pipe drive 60; The sub-tuner circuit unit selects a high frequency signal received through the antenna 66, converts and amplifies it to an intermediate frequency, detects an image signal from the intermediate frequency, and displays the image signal on the sub screen 72 displayed on the screen of the receiving tube. 52; It is connected to the main tuner circuit unit 50 and the external device 64, by switching the video signal applied from the main tuner circuit unit 50 and the external device 64, the main video signal demodulator 54 and the PIP signal processor ( A switching unit 56 applied to 58; The main video signal demodulator 54 is connected to the sub-tuner circuit 52 and the switching unit 56, and the image signal applied from the sub-tuner circuit 52 and the switching unit 56 is switched through the switching unit 56. A PIP signal processor 58 to be applied to the PIP signal processor 58; And The switching unit 56 is connected to the switching unit 56, the PIP signal processing unit 58, and the main video signal demodulation unit 54, and when an external device operation signal is applied from the remote controller 80 in the multi-screen mode, A multi-screen television having two video screens in a multi-screen mode consisting of a microcomputer 70 which controls the PIP signal processing unit 58 and the main video signal demodulation unit 54 to display an external device video signal on the move sub-screen 76. . The video signal corresponding to a video (VCR) or a game device, which is an external device 64 connected through an external input terminal 62, is displayed on the move sub-screen 76 as a moving picture. Multiscreen television with two video screens in multiscreen mode. According to claim 1, The microcomputer 70 has two video screens in the multi-screen mode, characterized in that to display a separate move sub screen 76 on one side of the main screen 74 in the 13 screen mode Multi-screen television. The main video signal demodulator 54 of claim 1, wherein the PIP signal processor 58 receives a video signal of an external device applied through the switching unit 56 under the control of the microcomputer 70 through the switching unit 56. And two video screens in the multi-screen mode, wherein the OSD blanking signal is directly applied to the main video signal demodulator 54.