KR19990012836U - Multi-screen television that is automatically searched and turned off at the end of a particular broadcast - Google Patents

Abstract

After watching a specific broadcast of a stereo or audio multiple night in the middle of the night using a multi-screen television, the other channel is automatically searched when the broadcast is terminated, and the specific broadcast is switched off if a specific broadcast of the stereo or audio multiple is not tuned in. Disclosed is a multi-screen television that is searched and turned off automatically. The viewer selects and displays a specific broadcast such as stereo broadcast or voice multicast on the screen of the multi-screen television to watch at night. When the specific broadcast is terminated and no signal is applied to the screen, the microcomputer automatically searches for the main tuner circuit to detect whether there is a voice multiple broadcast or a stereo broadcast. The microcomputer operates the main tuner circuit to tune to a corresponding channel when the stereo broadcast or the voice multiple broadcast is detected by the search operation of the main tuner circuit so that the stereo broadcast or the voice multiple broadcast is displayed on the screen. On the contrary, if the stereo or voice multiple broadcasting is not detected by the search operation of the main tuner circuit, the microcomputer applies an off switching signal to the main power to turn off the television to prevent unnecessary power consumption and to facilitate the viewing of the television. Can be.

Description

Multi-screen television that is automatically searched and turned off at the end of a particular broadcast

The present invention relates to a multi-screen television, and more specifically, to watch a specific broadcast in the middle of the night or stereo using a picture in picture (TV), when the broadcast is terminated automatically search for another channel, The present invention relates to a multi-screen television which is automatically searched and turned off at the end of a specific broadcast which is turned off if a specific broadcast of stereo or audio multiplex is not tuned in.

In general, a television receives a broadcast video signal transmitted from each broadcast station through an antenna so that a broadcast selected by the tuner circuit unit is displayed on a screen (CRT). The video of an object photographed by a camera at the broadcast station is converted into a video signal. The video signal is loaded on a predetermined high frequency signal along with the audio signal and transmitted through a transmitting 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 converts the high frequency signal corresponding to the channel selected by the channel selection function in the tuner circuit to an intermediate frequency, and then amplifies the signal into an appropriate size signal for signal processing in the intermediate frequency amplifier. The intermediate frequency is detected by the video signal detector and the audio signal detector, respectively, and after a predetermined step, the video signal is displayed on the screen through the demodulation circuit, and the audio signal is displayed through the audio demodulation circuit. Demodulation is applied to the speaker and output. Accordingly, when a user selects a broadcast channel to receive through a television by 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 sub tuner circuit portion are provided with a broadcast video signal. It is connected to one antenna for receiving a high frequency signal, which receives all high frequency signals simultaneously. Therefore, the screen is provided with a sub-tuner circuit for a separate sub-screen so that the main screen and the sub-screen is displayed at the same time, one main screen and two or more sub-screen is displayed on the screen.

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 for demodulating and outputting the composite video signal corresponding to the channel selected by the main tuner circuit unit 10 to be displayed on the water pipe 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; Connected to the main tuner circuit unit 10 and the external signal input terminal 26, and the PIP control unit 18 or the main image signal recovery of each composite video signal applied from the main tuner circuit unit 10 and the external signal input terminal 26. A switching unit 16 for switching to be applied to the jaw unit 12; It is connected to the sub-tuner circuit 14 and the switching unit 16, and mixes all the composite video signals applied from the sub-tuner circuit 14 and the switching unit 16 to restore the main video signal through the switching unit 16 A PIP signal processor 18 for applying to the grandfather 12; The main tuner circuit unit 10, the sub tuner circuit unit 14, the main video signal demodulation unit 12, the PIP signal processing unit 18 and the switching unit 16 are applied from an external button unit (not shown). The micro tuner 20 controls the operation of the main tuner circuit unit 10, the sub tuner circuit unit 14, the main video signal demodulator 12, the PIP signal processor 18, and the switching unit 16 according to the signal.

In the television having the PIP function, the microcomputer 20 recognizes this when the viewer selects the multi-screen mode using the screen selection button of the button while watching a broadcast program using the television having the PIP function. A multi-screen signal is applied to 18, the main video signal demodulator 12 applies an OSD blanking signal corresponding to the number of multi-screens, and a main applied to the switching unit 16 through the main tuner circuit 10. The video signal is applied to the PIP signal processor 18 so that only the signal applied from the PIP signal processor 18 is applied to the main video signal processor 12. The main video signal demodulator 12 applies an OSD screen to the water pipe drive 22 by the OSD blanking signal applied from the microcomputer 20 so that the OSD screen is displayed on the screen (CRT) 28 and the switching. The unit 16 applies all of the multi-screen video signals applied from the PIP signal processor 18 to the main video signal processor 12, so that the main video signal demodulator 12 receives the video signals from the PIP signal processor 18. Display on the OSD screen. Therefore, the screen (CRT) 28 displays a multi-screen selected by the viewer.

When the broadcast is completed during the display while watching a specific broadcast in stereo or audio multiple times on the screen 28 of the television having the PIP function at night, the viewer should turn off the main power since the broadcast signal is not applied to the screen of the television. When a viewer falls asleep while watching television, the viewer does not recognize it and consumes unnecessary power.

The present invention was devised to solve the above problems, and the object of the present invention is to search for a specific broadcast of stereo or voice multiple times in the middle of the night using a multi-screen television and then automatically search for another channel when the broadcast is closed. The present invention provides a multi-screen television that is automatically searched and turned off at the end of a specific broadcast that turns off the power if a particular broadcast of stereo, voice or multiplex is not selected.

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 that is automatically searched and turned off at the end of a specific broadcast according to the present invention.

3 is a diagram illustrating an adjustment menu for automatically searching and turning off a specific broadcast according to the present invention.

Explanation of symbols on the main parts of the drawing

50: main tuner circuit 52: main video signal demodulator

54: main audio signal detector 56: voice signal demodulator

58: speaker 60: microcomputer

62 remote controller 64 antenna

66: water pipe drive 68: signal detector

70: Screen (CRT) 72: OSD Screen

74: auto channel adjustment menu 80: main power

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 into an intermediate frequency which is easy to amplify for display on a main screen among high frequency signals received through an antenna; A main image signal demodulation unit connected to the main tuner circuit unit for demodulating and displaying a luminance signal and a color signal applied from the main tuner circuit unit on a screen; A main audio signal detection unit connected to the main tuner circuit unit for detecting an audio signal mixed with the main video signal output from the main tuner circuit unit; A voice signal demodulator connected to the main voice signal detector and demodulating the voice signal applied from the main voice signal detector and outputting the demodulated voice signal through a speaker; A signal detector connected to the voice signal demodulator and configured to detect a stereo signal or a multiple voice signal from the voice signal demodulator; The main tuner circuit unit and the signal detector are connected to the main tuner circuit unit. When no signal is set at a set night time, the main tuner circuit unit is tuned to perform channel switching when a voice multiple signal or a stereo signal is applied from the signal detector. Provides a multi-screen television that is automatically searched and turned off at the end of a specific broadcast consisting of a microcomputer that turns off the main power when there is no signal.

According to the present invention, a viewer selects and displays a specific broadcast such as stereo broadcast or voice multiple broadcast on a screen of a multi-screen television, so that the viewer watches at night. When the specific broadcast is terminated and no signal is applied to the screen, the microcomputer automatically searches for the main tuner circuit to detect whether there is a voice multiple broadcast or a stereo broadcast. The microcomputer operates the main tuner circuit to tune to a corresponding channel when the stereo broadcast or the voice multiple broadcast is detected by the search operation of the main tuner circuit so that the stereo broadcast or the voice multiple broadcast is displayed on the screen. On the contrary, if the stereo or voice multiple broadcasting is not detected by the search operation of the main tuner circuit, the microcomputer applies an off switching signal to the main power to turn off the television to prevent unnecessary power consumption and to facilitate the viewing of the television. Can be.

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

2 is a block diagram schematically illustrating a multi-screen television that is automatically searched and turned off at the end of a specific broadcast according to the present invention.

3 is a diagram illustrating an adjustment menu for automatically searching and turning off a specific broadcast according to the present invention.

Referring to FIG. 2 and FIG. 3, a multi-screen television that is automatically searched and turned off at the end of a specific broadcast will be described. The high-frequency signal received through the antenna 68 will be viewed through the main screen by the main tuner circuit unit 50. The main tuner circuit unit 50 is selected to convert the video signal of the selected channel into an intermediate frequency that can be amplified to a size suitable to be displayed on the screen 70 and then amplified. The main video signal demodulation unit 52 is connected to the main tuner circuit unit 50, and the main video signal demodulation unit 52 demodulates a luminance signal and a color signal applied from the main tuner circuit unit 50 to receive the water pipe drive 66. ) Is displayed on the screen 70. The main audio signal detection unit 54 is connected to the main tuner circuit unit 50, and the main audio signal detection unit 54 detects an audio signal mixed with the main video signal output from the main tuner circuit unit 50. The voice signal demodulator 56 is connected to the main voice signal detector 54, and the voice signal demodulator 56 demodulates the voice signal applied from the main voice signal detector 54 to be output through the speaker 58. do. A signal detector 68 is connected to the voice signal demodulator 56, and the signal detector 68 detects whether a stereo signal or a voice multiple signal is present from the voice signal demodulator 56 and performs a stereo signal or voice multiplex. If a signal is present, a high signal is output. If a stereo signal or a voice multiplex signal is not present, a low signal is output. The micro tuner 60 is connected to the main tuner circuit unit 50 and the signal detector 68, and the microcomputer 60 is connected to a non-signal in which a video signal does not exist in a broadcast signal applied to a screen at a set time of the night. In this case, the main tuner circuit unit 50 is tuned to switch the channel when the audio multiple signal or the stereo signal is applied from the signal detector 68, and the main power is turned off if the audio multiple signal or the stereo signal is not present.

According to the present invention, the viewer selects a specific broadcast such as stereo broadcasting or voice multiple broadcasting at night. At this time, the viewer can change the channel by automatically searching for stereo or voice broadcasting at night, or turn off the main power when no stereo or voice broadcasting is detected. 62) to apply an automatic channel adjustment signal to the television. When the automatic channel adjustment signal is applied from the remote controller 62, the microcomputer 60 applies the OSD blanking signal to the main video signal demodulator 52 and simultaneously applies the automatic channel adjustment menu data. The main video signal demodulator 52 causes the OSD screen 72 to be displayed on the screen 70 through the water pipe drive 66 by the OSD blanking signal applied from the microcomputer 60 and the automatic channel adjustment menu data. In addition, when the OSD screen 72 is displayed on the screen 70, the automatic channel adjustment menu 74 is displayed on the OSD screen 72. Accordingly, as shown in FIG. 3, an OSD screen 72 is displayed on the screen 70, and an automatic channel adjustment menu 74 is displayed on the OSD screen 72. Viewers can use the automatic channel adjustment menu 74 displayed on the OSD screen 72 to switch channels by automatically searching for stereo broadcasts or voice broadcasts in the middle of the night, or stereo or voice broadcasts are not detected. If not, set the automatic channel adjustment to ON to perform the function of turning off the main power supply, and set the automatic channel adjustment time range (for example: PM12 o'clock to AM2 o'clock).

In the state where the automatic channel adjustment time range is set using the automatic channel adjustment menu 74 displayed on the OSD screen 72 as described above, the viewer is in the automatic channel adjustment time range (for example, PM12 o'clock to AM2 o'clock). When a specific signal such as stereo broadcasting or voice multiple broadcasting is selected and displayed on the screen 70 of the multi-screen television, and when no signal is applied to the screen 70 by the end time of the broadcast, no signal is applied to the screen 70. This is detected by the read mode of the microcomputer 60. That is, the microcomputer 60 detects the main video signal from the read mode provided in the main tuner circuit unit 50, and the microcomputer 60 searches for the main tuner circuit unit 50 when the main video signal is not detected. To run it. The main tuner circuit unit 50 searches for a broadcast signal among the high frequency signals applied from the antenna 64, and the main voice signal detection unit 54 connected to the main tuner circuit unit 50 is connected to the main tuner circuit unit 50. Only voice signals are detected from the broadcast signals of the channels to be searched. The main voice signal detector 54 detects a voice signal and applies the voice signal to the voice signal demodulator 56. Since the signal detector 68 is connected to the voice signal demodulator 56, when the voice signal is applied to the voice signal demodulator 56, the signal detector 68 includes a stereo broadcast signal or a voice multiple broadcast signal. You will be detected. The signal detector 68 applies a high signal to the microcomputer 60 when a stereo broadcast signal or a voice multiple broadcast signal is detected from the voice signal demodulator 56. When the high signal is applied from the signal detector 68, the microcomputer 60 determines that the audio signal includes a stereo broadcast signal or a voice multiplex signal, and applies the channel tuning signal to the main tuner circuit 50. When the channel tuning signal is applied from the microcomputer 60, the main tuner circuit unit 50 selects a corresponding channel and applies the main video signal to the main video signal demodulation unit 52. The main video signal demodulator 52 demodulates the main video signal applied from the main tuner circuit unit 50 and displays the demodulated main broadcast signal on the screen 70. The included broadcast is displayed.

On the contrary, the signal detector 68 applies a low signal to the microcomputer 60 when the stereo broadcast signal or the voice multiple broadcast signal is not detected from the voice signal demodulator 56. The microcomputer 60 applies the off switching signal to the main power source 80 when the main tuner circuit unit 50 performs a search operation for a predetermined time and then a low signal is continuously applied. The main power supply 80 is automatically switched to the off state when the off switching signal is applied from the microcomputer 60 to prevent unnecessary power consumption.

As can be seen from the above description, the present invention allows viewers to watch at night by selecting and displaying a specific broadcast such as stereo broadcasting or voice multiple broadcasting on the screen of a multi-screen television. When the specific broadcast is terminated and no signal is applied to the screen, the microcomputer automatically searches for the main tuner circuit to detect whether there is a voice multiple broadcast or a stereo broadcast. The microcomputer operates the main tuner circuit to tune to a corresponding channel when the stereo broadcast or the voice multiple broadcast is detected by the search operation of the main tuner circuit so that the stereo broadcast or the voice multiple broadcast is displayed on the screen. On the contrary, if the stereo or voice multiple broadcasting is not detected by the search operation of the main tuner circuit, the microcomputer applies an off switching signal to the main power to turn off the television to prevent unnecessary power consumption and to facilitate the viewing of the television. Can be.

Claims (2)

A main tuner circuit unit 50 for converting and amplifying an image signal of a selected channel into an intermediate frequency which is easy to amplify for display on a main screen among high frequency signals received through an antenna 64; A main image signal demodulation unit 52 connected to the main tuner circuit unit 50 and demodulating the luminance signal and the color signal applied from the main tuner circuit unit 50 and displaying the demodulated signal on the screen 70; A main audio signal detection unit 54 connected to the main tuner circuit unit 50 for detecting an audio signal mixed with the main video signal output from the main tuner circuit unit 50; A voice signal demodulator 56 connected to the main voice signal detector 54 for demodulating and outputting the voice signal applied from the main voice signal detector 54 through a speaker 58; A signal detector (68) connected to the voice signal demodulator (56), for detecting a stereo signal or multiple voice signals from the voice signal demodulator (56); And The main tuner circuit unit 50 and the signal detector 68 are connected to the main tuner circuit unit 50 when no signal is detected during the set night time, so that a voice multiple signal or a stereo signal is received from the signal detector 68. A multi-screen television that is automatically searched and turned off when a specific broadcast consisting of a microcomputer 60 switches the channel when the channel is applied and turns off the main power supply 80 when there is no audio multiple signal or stereo signal. The method of claim 1, wherein the microcomputer 60 applies the OSD blanking signal and the automatic channel adjustment menu data to the main video signal demodulator 52 when the automatic channel adjustment signal is applied from the remote controller 62. When the OSD blanking signal and the automatic channel adjustment menu data are applied from the microcomputer 60, the main image signal demodulator 52 displays the OSD screen 72 on the screen 70 and automatically adjusts the OSD on the OSD screen 72. Display menu 74, In the automatic channel adjustment menu 74, the microcomputer 60 automatically searches for stereo broadcasts or voice multiple broadcasts when no signal is applied to the screen 70, or switches channels, or if stereo broadcasts or voice multiple broadcasts are not detected. A multi-screen television which is automatically searched and turned off at the end of a specific broadcast, characterized in that an operating time for performing a function of turning off the main power is set.