KR20000007309U - Digital Clock Built-in TV - Google Patents

Abstract

The present invention relates to a digital clock built-in TV that has a digital clock with a separate power battery for correcting the current time of the television so that the current time can be maintained accurately. A digital clock (130) for holding the digital clock (130), a timer (120) which is driven based on the power supply of the television, and maintains a current time for performing the reservation function of the television; Including a microcomputer (110) for initializing the timer to the current time of the digital clock when an error occurs by comparing the current time, the TV automatically controls the power of the TV on / off or wake-up and sleep time setting, or reservation Digit built into the TV when the schedule function automatically switches to channel By correcting the current time from time to time using the full clock, the user can accurately perform the reservation function at the desired time by using the correct current time.

Description

TELEVISION HAVING A DIGITAL CLOCK FOR CORRECTING CURRENT TIME

The present invention relates to a digital clock built-in television, and more particularly to a digital clock built-in television having a digital clock with a separate power battery for correcting the current time of the television to accurately maintain the current time.

In general, a television that receives a broadcast signal to watch video and audio can turn on the TV at a wake-up time set by the user for wake-up and bedtime reservations, and to turn on the TV at a bedtime set by the user. There is a reservation function such as turning off or automatically switching to a reserved channel at a preset time.

This reservation function helps the user wake up by starting the broadcasting of the TV through the user's wake-up time setting as an alarm for the user in the morning. When the bedtime is recognized or the user is asleep, the TV is automatically turned off to obtain a power saving effect, and it is a very useful function for the user to reserve the important broadcast program that the user wants to watch.

1 is a schematic block diagram of a typical TV, which is a key input unit 10, a microcomputer 20, a timer 30, a tuner unit 40, a video / audio signal processing unit 50, and an OSD unit 60. ), A monitor 70, a speaker 80, and a power supply unit 90.

In this configuration, the key input unit 10 is provided with a plurality of keys for performing various operations of the television outputs a key signal corresponding to the user's key operation to the microcomputer 20, the microcomputer 20 is the key input unit Each component is controlled on the basis of the key signal from (10) to control the overall operation of the television. The timer 30 is reset based on a predetermined power source from the power supply unit 90 described later, and is based on the predetermined oscillator. To keep the current time.

The tuner 40 receives a broadcast signal received through a channel selected under the control of the microcomputer 20, and the video / audio signal processor 50 demodulates / decodes a broadcast signal applied from the tuner 40. It detects and separates the video signal and the audio signal, and processes the separated video signal into a displayable signal and outputs it to the OSD unit 60. The separated audio signal is processed into a signal that can be output and output to the speaker 80. The OSD 60 synthesizes the video signal applied from the video / audio signal processor 50 and the text signal corresponding to the control of the microcomputer 20 and outputs the synthesized text signal to the monitor 70.

In addition, the power supply unit 90 supplies predetermined power for the operation of each component described above.

When performing the reservation function in the television having the above-described configuration, the current time maintained based on the driving of the timer 30 is used, but the current time of the timer 30 has a possibility that an error occurs when time passes. When these errors accumulate, the current time is not accurate.

Therefore, in order to accurately perform the above-described reservation function at the time set by the user, the current time of the timer of the television should be periodically corrected.

For the current time correction, the Korean Utility Model Registration Application No. 94-36981 or the like transmits the current time information to the vertical synchronization signal section of the composite video signal from a broadcasting station and transmits the vertical synchronization signal section of the received composite video signal. The present time information is detected by comparing the detected current time information with the current time of the timer, and the current time is corrected by the detected current time information.

More specifically, a timer for generating " hour ", " minute " and " second " data, and a synchronization detector for receiving / demodulating a television broadcast signal to extract a composite video signal and detecting synchronization of the composite video signal, and the synchronization is performed. A time information detector for inputting the output of the detector to detect current time information, a time comparator for comparing the "minute" data of the current time of the timer with a predetermined reference value when the current time information is detected, and a time comparison result, the current time of the timer If the "minute" data of the timer is less than or equal to the reference value, set the "minute" data of the timer to "0", and if the "minute" data of the timer's current time exceeds the reference value, increase the "hours" data of the timer by one. And a time setting control unit for controlling the timer to set the "minute" data to "0".

However, in the case of correcting the conventional current time as described above, the current time information must be loaded in real time on a predetermined horizontal line section of the vertical synchronization signal section of the composite video signal from a broadcasting station, and the composite video is transmitted on a television. A separate decoder means for reading the current time information carried in the vertical synchronization signal section of the signal must be provided, and a small time difference exists between the current time information read out through this process and the current time in the timer. There was a problem in that the fine time difference should be corrected again.

In addition, the above-described timer of the television has an inconvenient problem of being reset when the AC power of the television is turned off to reset the current time.

The present invention has been made to solve the above problems, and the object of the present invention is to provide a television with a digital clock with a built-in battery so that the television can automatically correct the current time maintained by an internal timer. The present invention provides a digital clock-embedded television that can correct a current time of a timer by using time information from a digital clock at a predetermined cycle, for example, when the television is turned on.

1 is a schematic block diagram of a typical typical television.

2 is a block diagram of a digital clock embedded television according to a preferred embodiment of the present invention.

3 is a flow chart showing a current time correction process of the digital clock-embedded television according to the present invention.

<Description of Symbols for Main Parts of Drawings>

100: key input unit 110: microcomputer

120: timer 130: digital clock

140: tuner 150: video / audio signal processing unit

160: OSD unit 170: Monitor

180: speaker 190: power supply

The digital clock built-in television according to the present invention is a television capable of correcting the current time, and is driven based on a digital clock driven by a separate built-in battery to maintain the current time, and driven by a power source of the television. And a timer for maintaining a current time for performing a function, and a microcomputer for initializing the timer to the current time of the digital clock when an error occurs by comparing the current time of the digital clock with the current time of the timer when the power is turned on. It is characterized by.

The above object and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings by those skilled in the art.

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

2 is a block diagram of a digital clock embedded television according to a preferred embodiment of the present invention, which includes a conventional key input unit 100, a microcomputer 110, a timer 120, a tuner unit 140, and a video / audio signal processor. In addition to the 150, the OSD unit 160, the monitor 170, the speaker 180, and the power supply 190, the digital clock 130 may be driven by a separate internal battery to maintain a current time.

In this configuration, the digital clock 130 employed in accordance with the present invention maintains the current time correctly based on the clock pulse generated by generating the correct clock pulse from the crystal oscillator driven based on the built-in battery.

In addition, the microcomputer 110 controls the reservation function of the television by using the current time maintained by the timer 120. In order to correct the current time of the timer 120, the digital clock 130 for each predetermined period or when the power is turned on. Reads the current time maintained by) and compares it with the current time of the timer 120 to correct the current time of the timer 120 by the error.

Next, an operation process of the present invention having the above-described configuration will be described in detail with reference to the flowchart of FIG. 3.

First, when the key signal for power-on is applied from the key input unit 100 (step 300), the microcomputer 110 reads out the current time held by the digital clock 130 (step 302).

Next, the microcomputer 110 reads out the current time held by the timer 120 (step 304).

Then, the current time read out from the digital clock 130 is compared with the current time read out from the timer 120 (step 306).

At this time, if each current time of the digital clock 130 and the timer 120 are not the same, the microcomputer 110 controls the timer 120 to maintain the current time held by the digital clock 130. The current time is corrected (step 308).

On the other hand, if the current time of the digital clock 130 and the current time of the timer 120 is the same in the above-described step 306, or if the current time correction is made in the above-mentioned step 308 is always corrected while performing the normal operation The reservation function can be performed at the current time (step 310).

On the other hand, it will be understood by those skilled in the art that various changes and modifications can be made without departing from the spirit of the present invention.

As described above, according to the present invention, the TV is automatically turned on / off by setting the wake-up time and the sleep time, or when the reservation function for automatically switching to the reserved channel is performed at any time using the digital clock built in the TV. By correcting the current time, it is possible to accurately perform the reservation function at the desired time by using the accurate current time.

Claims (1)

As a TV that can automatically correct the current time, A digital clock 130 that is driven based on a separate built-in battery to maintain the current time, a timer 120 that is driven based on the power source of the television, and maintains the current time for performing the reservation function of the television, and a power source. And a microcomputer (110) for initializing the timer to the current time of the digital clock when an error occurs by comparing the current time of the digital clock with the current time of the timer.