KR20050091948A - Method for controlling power using motion detection in a digital tv - Google Patents

Abstract

The present invention relates to a power supply control method in a digital television receiver. That is, according to the present invention, when the digital television receiver performs the power saving mode, the motion detection of the input video signal is inspected to accurately inspect the valid video signal. Thus, when there is no input of the valid video signal, the power of the television receiver is automatically turned off. The TV's power stays on during the late-night hours or during the day when video signals are not being received, thus avoiding wasting power consumption.

Description

Power control method using motion detection in digital television receiver {METHOD FOR CONTROLLING POWER USING MOTION DETECTION IN A DIGITAL TV}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver, and more particularly, to an automatic power off control method through motion detection of a TV broadcast signal for energy saving in a television receiver.

Typically, the television receiver sleeps while the user is watching the TV late at night, forgetting to turn off the TV to prevent the TV receiver from being kept on for the entire night. The power saving mode is applied, and the power saving function of the above-described television is an important technology for preventing waste of power consumption in a projection TV or a PDP TV having a relatively high power consumption.

However, the sleep mode, which is one of the power saving modes applied to the conventional television receiver, requires the user to set the time to automatically turn off the TV. Therefore, when the user falls asleep without setting the automatic power off time of the TV, the TV effective broadcast signal There was a problem that the power consumption of the television receiver is kept on even in the late night time that is not received.

As a power saving function to compensate for the sleep mode, conventionally, the C-SYNC signal and the V-SYNC signal of the TV broadcast signal are detected whether the C-SYNC signal and the V-SYNC signal are not detected. A method of automatically turning off the power supply has been proposed, but the C-SYNC signal and the V-SYNC signal are included in the broadcast control signal instead of the TV program regular broadcast signal, which makes it difficult to accurately control the TV power off.

Accordingly, an object of the present invention is to accurately detect whether a valid TV broadcast signal is received even in a late-night time zone in which no broadcast signal is received, and automatically turn off the power of the television receiver, thereby detecting motion in a television receiver capable of preventing waste of power consumption. It is to provide a power control method using.

According to an aspect of the present invention, there is provided a power control method using motion detection in a television receiver, the method comprising: (a) setting a power saving mode to a television receiver according to a power saving mode request of a user; Performing motion detection of a TV broadcast signal input to the television receiver through the tuner; and (c) determining that there is no valid TV broadcast signal input to the television when a motion value is not detected in the received TV broadcast signal. To turn off the television receiver power.

Hereinafter, with reference to the accompanying drawings will be described in detail the operation of the preferred embodiment according to the present invention.

1 is a schematic block diagram of a digital television receiver to which an embodiment of the present invention is applied. Referring to FIG. 1,

The TV receiving unit 100 detects a channel selected by the MICOM 112 and demodulates the detected modulated signal to input a TV broadcast signal. The video decoder 102 decodes the TV broadcast signal inputted through channel selection and applies it to the digital signal processor (DSP) 104. The DSP unit 104 performs signal processing on the TV broadcast signal decoded and output from the video decoder 102 so that the signal processed video signal is displayed on the digital television receiver 108 through the image reproducing unit 106.

The key input unit 118 includes a plurality of numeric keys and function keys for controlling the operation of each part of the digital television receiver. The key input unit 118 generates corresponding key data and inputs them to the microcomputer.

The motion detector 110 checks whether motion is detected in a TV broadcast signal received from the TV receiver 100 and a video signal from an external device 116 such as a VCR connected to the television receiver. The motion detection value for the broadcast signal or the external input video signal is applied to the microcomputer 112 so that the microcomputer can determine whether an effective video signal is input.

The microcomputer 112 controls the overall operation of the television according to the input of the function key provided in the front key panel 118, and inputs the channel setting key input from the front key panel 118. The TV broadcast signal of the channel set by the user among the TV signals demodulated from the TV receiver 102 according to the signal is displayed through the digital TV receiver 108.

In addition, when the TV power save mode is set according to an embodiment of the present invention, the TV broadcast signal received from the TV receiver 100 through the motion detector 110 and input from an external device 116 connected to a television receiver such as a VCR are input. After checking whether a motion is detected in the video signal and receiving a valid TV broadcast signal, if the motion value is not detected in the received TV broadcast signal, it is determined that no valid TV broadcast signal exists and the TV power is turned on. Turned off.

FIG. 2 is a flowchart illustrating an automatic power-off process flow through motion detection of an input video signal in a digital television receiver according to an exemplary embodiment of the present invention. Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2.

First, the user turns on the power of the digital television using the key input unit 118 (or the remote control, etc.) to select a TV, and then selects a channel to be watched. Then, the microcomputer 112 of the digital television apparatus (S200) In step), the digital television device is turned on in response to the power-on key input applied through the front key input unit 118 or the remote controller, and then the TV program of the channel selected by the user is displayed on the screen.

In this case, the user may set a power saving mode in the television receiver for power saving function of the television receiver. When the power saving mode setting is requested by the user, the microcomputer 112 sets the power saving mode in the television receiver in step S202. In operation S204, the motion detector 110 is controlled to check whether motion is detected in the video signal input from the TV receiver 100 or the external connection device 116.

At this time, if motion is detected in the input video signal, the microcomputer 112 recognizes the input video signal as a valid TV broadcast signal or an external input video signal and proceeds to step S206 to wait for the next key input command from the user. .

On the other hand, if no motion is detected in the input video signal, the microcomputer 112 recognizes that the input video signal is not a valid video signal, and proceeds from step S204 to step S208 for a predetermined time. After checking whether the motion is not detected, if the motion is not detected continuously for a predetermined time, it is determined that there is no valid video signal received any more, and the flow proceeds to step S210 to turn off the power of the digital television. This will prevent power waste.

In the present invention as described above, when the power saving mode of the digital television receiver is performed, the motion detection of the input video signal can be inspected to accurately check the valid video signal, thereby automatically turning off the power of the television receiver when there is no input of the valid video signal. In other words, the TV power is kept on during the late night hours or during the day when no valid video signal is received, thereby preventing wasting power consumption.

Meanwhile, in the above description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the invention should be determined by the claims rather than by the described embodiments.

As described above, according to the present invention, when the power saving mode of the digital television receiver is performed, the motion detection of the input video signal can be inspected to accurately check the valid video signal, thereby automatically powering the television receiver when there is no input of the valid video signal. By turning off, there is an advantage in that the TV power is kept on during the late night time period or during the day when no effective video signal is received, thereby preventing waste of power consumption.

1 is a schematic block diagram of a digital television receiver to which an embodiment of the present invention is applied;

2 is a flowchart illustrating a power-off operation control using motion detection in a digital television receiver according to an exemplary embodiment of the present invention.

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

100: TV receiver 102: video decoder

104: DSP unit 106: video playback unit

108: TV receiver 110: motion detection unit

112: micom 114: switching unit

116: external device 118: front key input unit

Claims (3)

A power control method using motion detection in a digital television receiver, (a) setting a power saving mode for the television receiver according to the power saving mode requirement of the user; (b) detecting a motion of a TV broadcast signal input to a television receiver through a tuner when the power saving mode is set; (c) when the motion value is not detected in the received TV broadcast signal, determining that there is no valid TV broadcast signal input to the television and turning off the television receiver power; Power control method using motion detection in a digital television receiver comprising a. The method of claim 1, In the step (b), (b1) checking whether the C-Sync and V-Sync signals are detected from the TV broadcast signal input in the power saving mode; (b2) if the C-Sync and V-Sync signals are detected, detecting whether a valid TV broadcast signal is received by performing motion detection on the input TV broadcast signal; Power control method using a motion detection in a digital television receiver comprising a. The method of claim 1, The digital TV receiver is a PDP, projection type digital TV receiver, characterized in that the power control method using motion detection in a digital television receiver.