KR19990025611A - TV Power Supply Control Unit - Google Patents

Abstract

The present invention relates to a power supply control apparatus for a television in a non-broadcast signal, comprising a broadcast end time code detector (40) for detecting a broadcast end time code included in a video signal component, and sleeping based on the detected broadcast end time. A controller 22 for controlling the setting guide of the reservation function and the selective execution of the sleep reservation / channel change, a remote controller 20 for setting the selective execution of the sleep reservation / channel change in response to the setting guide of the sleep reservation function; Under the control of the controller 22, the OSD processor 42 for generating an OSD signal for guiding the sleep reservation function to be displayed on the CRT device 30, and the controller 22 determines the arrival of the broadcast end time. And a timer 44 for executing the time clock to be applied to the control unit 22 so as to control the current viewing channel and the broadcast end time of the channel under the control of the control unit 22. By displaying, the viewer can select the sleep reservation button or channel change function of the remote controller, and when the sleep reservation button is operated, the power can be automatically turned off by opening the switching element at the end time of broadcasting of the channel, while changing the channel. If the function is set, the searchable channel can be searched at the present time to be changed to the searched channel, and the horizontal synchronization signal is detected by the sync signal detector 38 without the sleep reservation / channel change being set. If is not detected, the control unit 22 determines that there is no broadcast signal state and automatically controls the power OFF.

Description

TV Power Supply Control Unit

The present invention relates to a power supply control apparatus for a television in a non-broadcast signal, and more particularly, to automatically cut off the power at the end of a broadcast while watching a broadcast signal of a specific channel transmitting the broadcast end time. The present invention relates to a power supply control apparatus of a television in a broadcast-free signal for preventing power consumption.

In general, in the case of a television which is intended to channel-view and view broadcast signals transmitted from a plurality of broadcast stations, a considerable amount of power is consumed for reproduction of broadcast signals, including power used for color reproduction in the CRT apparatus. In particular, even when the broadcasting station ends the entire broadcast time according to the broadcast order of the broadcast program, if the viewer goes to bed without turning off the power of the television, the television continues to operate even in the state of no broadcast signal. In this state, white noise is displayed on the screen of the CRT device, and only unpleasant noise is output to the speaker device.

In consideration of such a point, in order to provide viewers with more diversified functions, recent televisions adopt a wake-up reservation function as an on-timer function and a sleep reservation function as an off-timer function.

Among the known weather reservation functions, when the viewer sets a power-on time for the television automatically, and then turns off the power, the television automatically executes the power-on control at the reserved power-on time to enter the operating state. The viewer will be able to wake up.

The sleep reservation function, which has a meaning opposite to the above-described wake-up reservation function, is operated when a viewer reserves an automatic power off time of the television, and the television automatically executes a power off control when the scheduled power off time arrives. By entering the state, for example, even when the viewer goes to bed while watching television, unnecessary waste of power consumption can be eliminated while preventing the TV from operating insignificantly for a long time in the non-broadcast signal state due to the termination of broadcasting.

1A is a diagram illustrating a power cut method of a television in a broadcast-free signal according to a conventional example. In the figure, reference numeral 10 denotes a transformer transformer for transforming the commercial AC power applied to the primary side, and 12 denotes a rectifying unit by, for example, a bridge diode that rectifies the power transformed by the transformer transformer 10 to obtain a DC power source. 14 denotes a flyback transformer FBT that transforms a DC power source obtained from the rectifying unit 12 to generate a high voltage Av or various kinds of power sources B + and Vcc.

16 denotes a switching element for switching a power path applied to the flyback transformer 14, and 18 denotes a standby power supply for rectifying / smoothing the commercial AC power and providing a standby power supply of a controller to be described later. Indicates.

20 is a remote control for selectively executing the overall function of the television, the remote control 20 has a power button for power ON / OFF, a sleep reservation button for sleep reservation, the sleep setting button set by the sleep reservation button In the reservation function, a cursor transfer button and a selection button or a 10-key are provided for setting the power off time.

22 is in response to the remote control signal by the operation of the power button of the remote controller 20 and the button operation for setting a specific function while waiting by the standby power applied from the standby power supply unit 18 in the non-operation state of the television. A control unit for controlling the operation of the television corresponding to the remote control signal is shown, 24 denotes a tuner for executing tuning of a specific channel corresponding to the tuning data VT applied from the control unit 22, and 26 is the tuner. An image IF module for providing an image IF signal PIF by applying IF conversion processing to a video signal component of a broadcast program received on a channel tuned in step 24 by applying a predetermined intermediate frequency IF, and 28 denotes the above. An image processing unit for reproducing the image IF signal provided from the image IF module 26 as an R / G / B color signal and applying the color to the CRT device 30 so as to be displayed as a color image. Produce.

32 indicates a power level control signal of high level (when power is ON) or low level (when power is OFF) outputted from the controller 22 when power ON or power OFF is instructed by the power button on the remote controller 20. The power source ST represents a resistor biasing the switching transistor 34 set to the collector voltage, and 36 represents a relay element connected to the emitter side of the switching transistor 34 to open and close the switching element 16. .

According to the operation of the television having the above-described configuration, when the standby power supply unit 18 rectifies and smoothes the commercial AC power supply to obtain the standby power supply ST and applies it to the control unit 22 when the power supply is turned off. ) Waits for the input of the power ON signal from the remote controller 20.

In this case, a low level power control signal is applied from the controller 22 to the switching transistor 34 through the resistor 32, and thus the switching transistor 34 is kept in a non-conductive state so that the relay The driving of 36 is not performed. Thus, the switching element 16 keeps the power path to the flyback transformer 16 open so that the television remains inactive.

In such a state, when the power ON signal is transmitted from the remote controller 20, the controller 22 applies a high level power control signal to the switching transistor 34 through the resistor 32. On the emitter side of the switching transistor 34, a driving power source of the relay element 36 by the standby power source ST is formed so that the switching element 16 is connected. Therefore, the commercial AC power is transformed to an appropriate level in the transformer transformer 10 to obtain a DC power in the rectifier 12, and the DC power is supplied through the power path formed by the switching element 16 to the flyback transformer. (14), the flyback transformer 14 generates a high voltage (Av) or a B + power source and a Vcc power source as the anode voltage of the CRT apparatus 30, thereby making the television operable.

When the power path is set, the control unit 22 selects the tuning data VT for the channel selected immediately before the power is turned off (i.e., the last memory channel) or the channel set by the remote controller 20. When applied to (24), the tuner 24 executes the tuning of the channel corresponding to the tuning data VT applied from the control unit 22, and outputs the video signal component of the broadcast program of the channel to the video IF module 26. Therefore, the video IF module 26 converts the video signal components by a predetermined IF signal to provide the video IF signal PIF.

The image IF signal PIF is applied to the image processing unit 28 and reproduced as an R / G / B color signal, and then applied to the CRT apparatus 30 to reproduce a color image on the CRT apparatus 30. .

When the bedtime reservation button provided in the remote controller 20 is operated while watching and operating the television by the above-described process, the bedtime reservation screen of the type illustrated in FIG. 1B is controlled under the control of the controller 22. According to the CRT device 30, according to the bedtime reservation screen, the control item (i.e., bedtime reservation; 30a) set by the remote controller 20 and the power OFF time setting item (10 minutes, 30 minutes, 60 minutes) 30B is displayed, and when the power-off time setting item is selected by the remote controller 20 (for example, 30 minutes), the controller 22 selects the set power-off time from the current time. That is, when 30 minutes) has elapsed, a low level power control signal is applied to the switching transistor 34 via the resistor 32, and the switching transistor 34 transitions to a non-conductive state. While deactivating the relay element 36 In this state, as the switching element 16 is opened, the power path of the corresponding television is cut off to become in an inoperative state.

However, in the case of the television having the sleep reservation function described with reference to FIGS. 1A and 1B, when the power OFF time set in the sleep reservation function has elapsed, the power path is automatically cut off, and the viewer enters the sleep state while watching the television. Unnecessary power consumption can be reduced. However, since the power off time set by the sleep reservation function is set only to reflect the viewer's intention to sleep, proper setting of the power off time in the sleep reservation function is impossible. Since the power path is automatically opened after the power-off time has elapsed, for example, if the viewer wants to watch television continuously after the power-off time elapses, the power-on operation for the television which has been switched to the power-off state must be repeated. There is a disadvantage.

In addition, the present invention regards a horizontal synchronous signal from the video IF signal, for example, when the horizontal synchronous signal is not detected, and regards the unsynchronized signal state, and automatically turns off the power in the non-broadcast signal state. When the broadcast is terminated and enters the broadcast-free signal state, a method of automatically searching for a viewable channel and automatically switching to that channel is also proposed. In order to watch broadcast signals of other channels, the power-on operation must be repeated, and when the end of broadcasting of a specific channel is detected, the automatic channel change to the viewable channel is performed. Under the 24-hour broadcasting system, the television continues to operate even when the viewer is in bed. It also has the drawback that it stays the same and is not very effective.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is cumbersome for the viewer to set only the power-off by the sleep reservation function or to change to a viewable channel based on the end time of the broadcast of a specific channel transmitted from a broadcasting station. It is an object of the present invention to provide a power supply control device for a television in a broadcast-free signal that enables power supply control to be performed without the need for repetitive power supply ON / OFF operation.

In order to achieve the above object, according to a preferred embodiment of the present invention, an image IF module for providing an image IF signal by intermediate frequency conversion of a video signal component of a channel tuned in a tuner, and R / G / B In a television having a video processing unit for reproducing a signal and displaying the same on a CRT apparatus, a television having a power path opened and closed by a switching element, wherein the broadcast end time code detection unit detects a broadcast end time code included in the video signal component and transmitted. And a control unit for controlling the setting guidance of the sleep reservation function and the selective execution of the sleep reservation / channel change based on the detected broadcast end time, and the selective sleep reservation / channel change in response to the setting guidance of the sleep reservation function. Remote control to set the execution, under the control of the control unit to generate an OSD signal for guiding the sleep reservation function to be displayed on the CRT device It is provided by the power supply control apparatus of the OSD processing unit and the control unit is broadcast to end execution of the current time to determine the timing of the arrival of the time configured equipped with a timer to be applied to the control unit when mubang songsinho television.

Preferably, the screen display for guiding the bedtime reservation function includes the channel number currently being viewed and the broadcast end time for the channel.

The apparatus may further include a synchronization signal detection unit configured to detect a horizontal synchronization signal from the image IF signal and apply a detection result of the horizontal synchronization signal to the control unit, wherein the control unit is in a state in which sleep reservation / channel change is not set. When the non-broadcast signal state in which the horizontal synchronizing signal is not detected is detected by the synchronizing signal detecting unit, power OFF control by opening the switching element is executed.

According to the power supply control apparatus for a television without a broadcast signal according to the present invention having the above-described configuration, when a broadcasting station transmits a broadcasting end time to a predetermined position of a video signal component, the channel currently being viewed under the control of the control unit By displaying the broadcast end time screen, the viewer can select the sleep reservation button or the channel change function of the remote control.

When the sleep reservation button is operated, the power can be turned off automatically by opening the switching element at the end time of broadcasting of the channel.If the channel change function is set, the channel can be searched under the control of the control unit. Changes to the searched channel are possible.

Further, if the horizontal synchronization signal is not detected by the synchronization signal detection unit when the sleep reservation / channel change is not set, the controller determines that the broadcast free signal is in the state and automatically controls the power OFF.

1A is a view for explaining a power control method for a non-broadcast signal of a television according to a conventional example;

1B is a diagram for explaining a bedtime reservation function of a television according to a conventional example;

2 is a block diagram showing a power supply control apparatus for a television in a broadcast-free signal according to the present invention;

3A and 3B are exemplary views showing an example of screen display on a CRT apparatus for explaining a power off process in a power supply control apparatus of a television in a broadcast-free signal according to the present invention;

4 is a flowchart illustrating the operation of a power supply control apparatus of a television in a broadcast-free signal according to the present invention.

* Description of the symbols for the main parts of the drawings *

14: flyback transformer, 16: switching element,

18: standby power unit, 20: remote control,

22: control unit, 24: tuner,

26: image IF module, 28: image processing unit,

30: CRT device, 34: switching transistor,

38: synchronization signal detection unit, 40: broadcast end time code detection unit,

42: OSD processing section, 44: timer.

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

FIG. 2 is a block diagram of a power supply control apparatus for a television in a broadcast-free signal according to a preferred embodiment of the present invention. The same reference numerals are added to the same parts as those shown in FIG. The power supply system shown in FIG. 1A is omitted in order to simplify the description.

That is, in FIG. 2, the remote controller 20 transmits a remote control signal for selectively executing the overall function of the corresponding television, and 22 operates / operates the television in response to the remote control signal transmitted from the remote controller 20. In addition to controlling the non-operation, based on the guidance of the broadcast end time for the channel currently being watched at the predetermined position of the CRT apparatus 30 and the search for the bedtime reservation or viewable channel when setting the bedtime reservation function assumed in the present invention. It is to control the guidance to confirm the channel change.

The tuner 24 performs the tuning of the channel to be watched under the control of the control unit 22, and the video IF module 26 performs IF conversion processing on the video signal component of the channel tuned by the tuner 24. The IF signal is provided, and the image processor 28 mixes and processes an OSD signal for reproducing the video IF signal, guiding the end of broadcast time, and a sleep reservation function or a channel change, which will be described later. ) To be reproduced.

38 is a synchronization signal detection unit that detects a horizontal synchronization signal from the video IF signal and applies it to the control unit 22. The synchronization signal detection unit 38 does not set the sleep reservation function described below while watching a specific channel. When the non-broadcast signal state is detected, the control unit 22 provides the detection result of the horizontal synchronization signal so that the power is automatically turned off after a predetermined time elapses.

40 denotes a broadcasting end time code detection unit for detecting the broadcasting end time code and applying the code to the control unit 22 when the broadcasting station transmits a code indicating the broadcasting end time of the channel in the video blanking period of the video signal. 42 is a OSD processing unit for generating an OSD signal for guiding the end of the broadcast time and the sleep reservation function / channel change guidance before the predetermined time of the end of the broadcast under the control of the control unit 22 to apply to the image processing unit 28. Reference numeral 44 denotes a timer that displays the current time and applies the same to the controller 22.

Here, when receiving the broadcast end time code, the control unit 22 controls such that the channel number currently being viewed and the broadcast end time are guided to a predetermined position of the CRT apparatus 30, and responds to the guidance. When the setting of the sleep timer reservation function is input by the remote controller 20, the power OFF control is performed at the end time of broadcasting of the channel, while when the channel change is input, the search is performed by searching for the viewable channel by the tuner 24. When searching for a possible channel, control is performed to automatically switch to that channel.

In addition, the control unit 22 is automatically in the state of the non-broadcast signal determined based on the detection result of the horizontal synchronization signal when the bedtime reservation function or the channel change is not set even when the current broadcast end time of the current viewing channel has passed. The power supply off is controlled.

Next, the operation of the power supply control apparatus of the television in the broadcast-free signal according to the present invention having the above-described configuration will be described in detail with reference to FIGS. 3 and 4.

First, as a broadcast station approximates the broadcast end time of a broadcast program, the broadcast station transmits a broadcast end time code for guiding the broadcast end time of the channel in the video blanking period of the video signal.

Therefore, when the viewer selects and watches a specific channel in step 50, the broadcasting end time code detector 40 detects the broadcasting end time code and applies it to the controller 22. It is determined whether the current time is close to the broadcast end time based on the time result provided by the timer 44. If the current time is close to the broadcast end time, that is, 10 times of the broadcast end time. If it is determined to be 15 minutes to 15 minutes before (YES in step 54), the controller 22 generates an OSD signal for the current viewing channel number and the broadcast end time of the channel from the OSD processing unit 42 in step 56. And control to be applied to the image processing unit 28, so that the OSD signal mixed with the image signal during the reproduction processing of the image signal is displayed on the CRT apparatus 30 by the image processing unit 28. It will be That is, the CRT device 30 displays the currently viewed channel number 30c and the broadcast end time 30d of the channel in the form illustrated in FIG. 3A.

The control unit 22 determines whether the operation input of the sleep reservation button is transmitted from the remote controller 20 in step 58 when the announcement of the broadcast end time is executed. As a result, the sleep reservation is scheduled from the remote controller 20. When the button operation is transmitted, the controller 22 confirms the setting of the sleep reservation function and controls the OSD processor 42 in step 60 so that the OSD signal for displaying the screen of sleep reservation completion is transmitted through the image processor 28. Displayed on the CRT device 30. Here, when the sleep reservation is completed, the CRT device 30 displays the current viewing channel number 30c and a figure 30e indicating completion of the sleep reservation, and the figure 30e shows an appropriate form indicating the sleep reservation state. It can be set to.

After the sleep reservation is completed, the controller 22 determines whether the current time indicated by the timer 44 reaches the broadcast end time, and as a result of the determination, when the current time reaches the broadcast end time ( That is, if it is YES in step 62, the controller 22 applies the low-level power control signal to the switching transistor 34 via the resistor 32 shown in FIG. The transition to the open state of the switching element 16 by the deactivation is controlled, and the television is automatically turned off. Therefore, in this case, when the current watching channel is terminated, the TV is automatically changed to the non-operation state, and thus the power off time is increased before the broadcasting program of the watching channel is terminated in the conventional power off time setting method. Disadvantages that arise when set are eliminated.

On the other hand, when the sleep reservation button is not inputted as a result of the determination in step 58, the controller 22 proceeds to step 66 and when the change from the remote controller 20 to the viewable channel is specified, the controller 22 in step 68 Searching for a viewable channel is performed while sequentially applying tuning data VT to the tuner 24. If a viewable channel is found as a result of the channel search, a change to the channel is executed. However, when there are a plurality of search channels, the channel number is preferably displayed on the screen so that the viewer can select the channel. In addition, even if the channel change is performed by the channel search, the process after step 52 is repeatedly performed, and when the end time of the broadcast of the changed channel is reached, the sleep reservation function for power off is automatically set. It is preferred to.

When the channel change input is not set in step 66, the controller 22 proceeds to step 70 to determine whether or not a broadcast-free signal state is generated based on the detection result of the horizontal synchronization signal applied from the sync signal detector 38. If the result of the determination is not in the broadcast-free signal state, the process proceeds to step 58 and the subsequent process is repeatedly performed, whereas if the horizontal sync signal is not detected in the broadcast-free signal state, the controller 22 performs the above-described step 64. Proceed to the power cut control.

As described above, according to the power supply control apparatus for a television without a broadcast signal according to the present invention, when a broadcasting station encodes and transmits a broadcasting end time of a broadcasting program, the television receiving the broadcasting end time sets the channel number and the broadcasting end time. By displaying the screen and selectively setting the sleep reservation / channel change, the optimum control regarding the power-off of the television can be ensured.

Claims (3)

An image IF module 26 which provides an image IF signal by converting an image signal component of a channel selected by the tuner 24 into an intermediate frequency, and reproduces the image IF signal by an R / G / B signal to produce a CRT device 30. In a television having an image processing unit 28 to be displayed on the panel, the power path is opened and closed by the switching element 16. A broadcast end time code detector 40 for detecting a broadcast end time code included in the video signal component and transmitted; A controller 22 for controlling the setting guidance of the sleep reservation function and the selective execution of sleep reservation / channel change based on the detected broadcast end time; A remote controller 20 for setting selective execution of sleep reservation / channel change in response to the setting guidance of the sleep reservation function; An OSD processor 42 for generating an OSD signal for guiding the sleep reservation function under the control of the controller 22 to be displayed on the CRT device 30; And a timer (44) which executes the time clock to apply to the control unit (22) by the control unit (22) to determine the arrival of the broadcast end time. The apparatus of claim 1, wherein the screen display for guiding the sleep reservation function includes a channel number currently being watched and a broadcast end time for the channel. The apparatus of claim 1, further comprising a synchronization signal detecting unit (38) for detecting a horizontal synchronizing signal from the image IF signal and applying a detection result of the horizontal synchronizing signal to the control unit (22). ) Performs power-off control by opening the switching element 16 when a non-broadcast signal state in which the horizontal synchronization signal is not detected by the synchronization signal detection unit 38 is detected while the sleep reservation / channel change is not set. Power control device for a television when no broadcast signal, characterized in that.