KR20000028159A - Method for minimizing errors in automatically setting up present time on tv - Google Patents

Abstract

PURPOSE: A method for minimizing errors in automatically setting up present time on TV is provided to prevent errors of a reservation function caused when correcting present time, by setting up unit of a seconds. CONSTITUTION: A method for minimizing errors in automatically setting up present time on TV comprises the steps of: decoding standard time data by extracting the time data inserted in a predetermined horizontal line section within a vertical blanking eliminating interval of a broadcasting signal, when TV power is on in a stand-by mode or when converting into the stand-by mode if the TV power is off; operating an error between the decoded standard time data and present time of an inner timer, when the inner timer is not reset; correcting present time by loading 'hours', 'minutes', 'seconds' data of the standard time data to the inner timer of TV, if the operated error is over a predetermined range and if the TV power is on in the stand-by mode; displaying an OSD(On Screen Display) characters screen presenting an error of the corrected time; and correcting present time by using the 'seconds' data only in the 'hours', 'minutes', 'seconds' data of the standard time data, if the timer is not reset and if the error between the standard time data and the present time is not over the predetermined range.

Description

ERROR MINIMIZING METHOD FOR AUTO TIME CORRECTION IN A TELEVISION

The present invention relates to a method for minimizing an error when automatically setting the current time in a television, and particularly, to automatically correct the current time of a timer inside a microcomputer in a television so that the error can be minimized and corrected. Error minimization method during configuration.

In general, in a television that receives a broadcast signal and enables viewing of video and audio, the television is turned on at a wake-up time set by the user for wake-up and sleep reservations, and the television is turned on at a bedtime set by the user. There is a reservation function to turn off.

The reservation function is performed by checking whether the reservation time (wake-up time, bedtime time) is reached by using a timer built in the microcomputer operating based on the constant power supply from the power supply unit supplying predetermined power to each component of the television. When the scheduled time comes, the power supply of the TV can be controlled on / off by selectively blocking / supplying the predetermined power from the above-described power supply for operating each component, or selectively operating the CRT of the monitor having the largest power consumption. Control, namely, the operation of the high voltage circuit supplying the high voltage direct current required for the CRT by stepping up and rectifying the pulse voltage generated during the horizontal blanking period in the horizontal output circuit and the horizontal output circuit for supplying a suitable sawtooth current to the horizontal deflection coil. The microcomputer selectively selects whether or not the horizontal output circuit generates pulse voltage Control and perform the function.

On the other hand, such a reservation function helps the user wake up by starting the broadcasting of the television in the morning through the user's wake-up time setting, and by setting the sleep time, the user's time to go to sleep stops This is a very useful feature that allows the user to recognize the bedtime or to automatically turn off the TV when the user is asleep.

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, since the reservation function in the above-described television can be properly performed only when the current time of the timer inside the television is accurate, the user can confirm the current time of such a television and the current time set in the television is actually If there is a difference from the current time, the user has to correct the difference by setting a predetermined key operation.

Recently, however, techniques for automatically correcting the current time of television have been disclosed.

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".

In detail, in a broadcasting system providing an extended data service (EDS), for example, KBPS (Korea Broadcasting Program System) is a data for broadcasting programs and scheduled recording on a broadcast signal, for example, a channel, a broadcast category (e.g., For example, news, drama, sports, etc.), broadcast start / end time, viewing grade, and standard time data can be converted into digital signals and inserted into an arbitrary horizontal line during a vertical blanking interval (VBI). By doing so, this signal is decoded by the KBPS decoder on the video receiving device side to perform a broadcast program reservation recording function or the like.

Therefore, in the television equipped with the KBPS broadcasting system providing the above-described EDS and equipped with the KBPS decoder, the standard time data is decoded from the above-mentioned data to correct the television's time.

Typically, standard time data is coded into a predetermined digit (e.g., 8 digits), including "hours", "minutes", "seconds", and inserted into any horizontal line within the vertical blanking period of the video signal. In television, the TV microcomputer uses the decoded standard time data by decoupling the sync signal from the broadcast signal received from the tuner, extracting and decoding the standard time data inserted in any horizontal line within the vertical blanking period of the separated sync signal. The current time of the internal timer is corrected.

However, poor reception of a broadcast signal in the process of extracting and decoding all data (8 digits) of "hours", "minutes", and "seconds" of standard time data inserted in any horizontal line within the vertical blanking period described above. There is a problem that the probability of an error is increased based on the sensitivity, and when such an error occurs, an error of "hours" or "minutes" generates a large error of the current time, and thus has a wrong current time on the television.

On the other hand, the current time of the television itself is maintained based on an internal predetermined clock, so that the amount of correction of the current time at a given time point is not a large amount of "hours", "minutes" but in most cases "seconds". The correction is made at.

In addition, since the current time automatic setting time is normally performed when the TV is turned on or the TV is off, it is not too much to assume that the current time is corrected at least once a day. When still, the amount actually corrected is also corrected in "seconds", so if you only correct in seconds for the current time correction, you will avoid large errors due to correction of "hours" and "minutes". It becomes possible.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problem, and an object thereof is to perform a correction in "second" units during current time correction, which automatically sets the value of a timer that maintains the current time inside the microcomputer. The present invention provides a method for minimizing an error in automatic setting of a current time in a television to prevent an error of a reservation function due to an error in a current time correction.

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

2 is a schematic block diagram of a television employed in accordance with the present invention;

3 is a flowchart illustrating an error minimization process in automatically setting a current time in a television according to a preferred embodiment of the present invention.

<Description of the code | symbol about the principal part of drawing>

10: key input unit 20: microcomputer

30: tuner 40: video / audio signal processing unit

50: OSD 60: Monitor

70: speaker 80: KBPS decoder

90: power supply

An error minimization method for automatically setting a current time in a television according to the present invention is a method of correcting a current time of a television by using standard time data included in a broadcast signal received from the television, wherein the television is turned on in a standby mode. Or, when the TV is turned off and enters the standby mode, the synchronization signal is separated from the broadcast signal received on the predetermined channel to extract and decode standard time data inserted in a predetermined horizontal line section within the vertical blanking period of the separated synchronization signal. And calculating the error of the decoded standard time data and the current time of the timer inside the television if the internal timer of the television is not reset, and the calculated error is out of a predetermined range or more and the power is turned off in the standby mode. If on, the decoded standard time Loading "hours", "minutes" and "seconds" of data into the television's internal timer to correct the current time and display an OSD character screen indicating time correction error, and the television's internal timer is not reset If the error between the standard time data and the current time of the timer inside the television does not exceed the predetermined range, only the "second" data is used in the "hour", "minute", and "second" data of the decoded standard time data. Correcting the current time of the timer inside the television, and if the television's internal timer is reset, load the "hours", "minutes" and "seconds" data of the decoded standard time data into the television's internal timer. And correcting the current time.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the 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 schematic block diagram of a television employed in accordance with a preferred embodiment of the present invention, including a key input unit 10, a microcomputer 20, a tuner unit 30, a video / audio signal processing unit 40, an OSD unit. 50, a monitor 60, a speaker 70, a KBPS decoder 80, and a power supply 90.

In this configuration, the key input unit 10 is a key input means for performing the operation of the television, and has a plurality of keys for performing the operation of the television, and outputs a key signal corresponding to the user's key operation. By using a remote control that can be input at a remote location, the user inputs a key signal operated by a user on a predetermined infrared carrier, and transmits the received infrared signal to the microcomputer 20 by receiving, amplifying, and detecting the transmitted infrared signal.

Then, the microcomputer 20 is driven based on the constant power supply from the power supply unit 80, which will be described later, and the tuner unit 30, the video / audio signal processing unit 40 and the key signal based on the key signal from the key input unit 10. By selectively controlling the OSD unit 50 to control the overall operation of the television, in particular, based on a key signal for powering off from the key input unit 10 to switch the mode of the television to the standby mode requiring the minimum power consumption, In order to switch to the active mode based on the key signal for power-on from the key input unit 10, and to correct the current time held by the internal timer of the television when the above mode is switched, the KBPS decoder unit 80 In the read KBPS information, " second " data of standard time data are used to correct and control the current time held by the internal timer.

In addition, the microcomputer 20 corrects the current time in units of "seconds", and maintains the standard time data including "hours", "minutes", and "seconds" applied from the KBPS decoder unit 80 and the internal timer. If the current time data is compared and the error range is outside the predetermined reference range or more, an error occurs in the current time correction setting by controlling the OSD unit 50 when the current time correction time is switched from the standby mode to the active mode. Display is controlled, but if the current time data is reset, that is, the main power is supplied again when the main power is cut off due to disconnection of the power plug instead of the TV is in standby state, "Time", "Minute", "Second" data of the read standard time data when the time information is extinguished, and "Year" data if there is "year" data. W correct the present time, and does not display the above-described control OSD screen.

Meanwhile, the tuner unit 30 outputs a broadcast signal received by being tuned to a corresponding channel corresponding to the control of the microcomputer 20.

In addition, the video / audio signal processing unit 40 separates the broadcast signal applied from the tuner unit 30 into a video and audio signal under the control of the microcomputer 20 and processes the video signal into a signal capable of display and output, respectively. Are output to the OSD unit 50, and audio signals to the speaker 70, respectively.

In addition, the OSD (On Screen Display) unit 50 is a device for processing text on a television screen, and reads a text signal corresponding to the control of the microcomputer 20 to display the video / audio signal to be displayed at a predetermined screen position The synthesizer outputs a video signal or a blue-back signal (the background color can be set to a color other than blue) applied from the processing unit 40.

In addition, the KBPS decoder unit 80 reads out the broadcast program information inserted at a predetermined position within the vertical blanking period of the broadcast signal received from the tuner unit 30 under the control of the microcomputer 20, and then the microcomputer 20 ) Is applied.

Finally, the power supply unit 90 is a device that converts the home AC power into a predetermined power for driving the television, and outputs the power. The microcomputer 20 continuously outputs the power at all times, and the other components, that is, the tuner unit ( 30) the predetermined power is selectively supplied to the video / audio signal processor 40, the OSD unit 50, the monitor 60, etc. under the control of the microcomputer 20.

Next, a detailed description will be given with reference to a flowchart of FIG. 3 attached to an error minimization process for automatically setting a current time in a television according to a preferred embodiment of the present invention including the above-described configuration unit.

First, on the basis of the power on / off key operation of the user's key input unit 10, it is determined whether the television is powered on in the standby mode or whether the television is switched off from the active mode to the standby mode (step 300). ).

Next, the microcomputer 20 controls the KBPS decoder unit 80 to separate the synchronization signal of the broadcast signal received from the tuner unit 30 (step 302), and selects a random signal within the vertical blanking period of the separated synchronization signal. Standard time data inserted in a predetermined horizontal line section is extracted (step 304), and the extracted standard time data is decoded (step 306).

At this time, the decoded standard time data is transferred to the microcomputer 20, and the microcomputer 20 calculates an error between the applied standard time data and the current time of the internal timer (step 308).

Next, the microcomputer 20 determines whether the internal timer is reset, that is, whether the main AC power applied from the power plug of the television is cut off and the internal timer of the television is initialized to "0" (step 310). ).

At this time, if the internal timer of the microcomputer 20 is reset and the current time is initialized, the extracted standard time data is loaded into the internal timer to correct the current time (step 312), and the process ends.

On the contrary, if the internal timer of the microcomputer 20 is not reset, it is determined whether the error calculated in the above-described step 308 is out of a predetermined range (step 314).

At this time, if the operation error does not deviate from the predetermined range or more, the current time of the internal timer is corrected using only "second" data among the extracted and decoded standard time data (step 316), and the process ends.

On the contrary, if the operation error is out of the predetermined range or more, the current time of the internal timer is corrected using only "second" data among the extracted and decoded standard time data (step 318), and the current TV is switched to the active mode. Awareness is determined (step 320).

At this time, the routine is terminated when the television is switched to the standby mode instead of the active mode. On the contrary, when the television is switched from the standby mode to the active mode, an error occurs in time correction by controlling the OSD unit 50. In addition, the corrected current time is controlled by the OSD character for a predetermined time (step 322), and the process ends.

Then, the user can check the corrected current time, and if the corrected current time is normal, the user continues to perform other functions of the television. If an error occurs in the corrected current time, the user manually manually sets the current time. The current time recalibration can be performed later, i.e., based on the power on / off of the television.

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, it is possible to maintain an accurate current time at all times by minimizing an error in automatic correction of the current time in a television, thereby having an effect of accurately performing the reservation function of the television without errors.

Claims (1)

A method of correcting the current time of a television using standard time data included in a broadcast signal received from a television, When the TV is turned on in the standby mode or when the TV is turned off to the standby mode, the synchronization signal is separated from the broadcast signal received on the predetermined channel and inserted into a predetermined horizontal line section within the vertical blanking period of the separated synchronization signal. Extracting and decoding the standardized visual data; If the internal timer of the television is not reset, the error of the decoded standard time data and the current time of the timer inside the television is calculated, and the calculated error is out of a predetermined range or more and the power is turned on in the standby mode. Loading the decoded “hour”, “minute”, “second” data of the decoded standard time data into an internal timer of a television to correct the current time and display an OSD character screen indicating time correction error; "Hours", "minutes", "seconds" of decoded standard time data if the internal timer of the television is not reset and the error between the standard time data and the current time held by the timer inside the television does not exceed the predetermined range. Correcting the current time held by the timer inside the television using only "second" data in the data; Automatically correcting the current time by loading the decoded “hours”, “minutes”, “seconds” data of the decoded standard time data into the television's internal timer if the television's internal timer is reset. How to minimize errors when setting.