KR970003441B1 - Electric power driving method - Google Patents

Abstract

A method for providing a power in case of receiving a star-sight broadcasting signal is disclosed. A star-sight broadcasting signal provided from an external is processed, demodulated and stored at a memory. A present time is checked at a microcomputer(2). And it is determined whether the present time is coincided with a star-sight broadcasting start time. According to a control signal from the microcomputer(2), a switch(9) provides or breaks a high voltage to a monitor. A demodulated star-sight data, which is demodulated at a star-sight signal demodulation unit(4), is stored at a star-sight memory(3). It is determined whether the present time is coincided with a star-sight broadcasting end time, and by determination result, the operations of a regulator(5) and a flyback transformer(10) are controlled.

Description

How to drive power when receiving Starsite broadcasting

1 is a schematic block diagram for performing a method for driving a power source when receiving a StarSite broadcast according to the present invention.

2 is a flowchart of a microcomputer for performing a method for driving a power source when receiving a StarSite broadcast according to the present invention.

* Explanation of symbols for main parts of the drawings

1: power supply 2: microcomputer

3: starsite memory 4: starsite signal demodulator

5: regulator 6: tuner

7: middle frequency detection and signal processor 8: antenna

9: switch 10: flyback transformer

The present invention relates to a method of driving a power source when receiving a Starsight broadcast. More specifically, when a predetermined time at which a StarSight broadcast signal is applied when the TV is off, the microcomputer keeps the TV monitor off. The present invention relates to a power supply driving method for receiving a starsite broadcast signal by turning on an internal circuit to receive a starsite broadcast signal.

In general, a user may search for a broadcast sequence described in a newspaper in order to watch a desired broadcast program, and may store a program to be watched among them, and then watch the broadcast by operating a channel at a time when the program is broadcast.

At this time, since there are only a few broadcasting stations that broadcast TV in Korea, the amount of programs broadcasted by the broadcasting stations is not large, so users can check and remember the order of broadcasting for the programs. Since the number of broadcasting stations is larger than that of Korea, it is almost impossible for the user to check the programs broadcast from the broadcasting stations.

In order to alleviate this inconvenience, the StarSite broadcasting system has recently been introduced in the United States. The starsite broadcasting system includes all broadcasts scheduled for the same day at a predetermined time, except for the regular time when the television is broadcast. When the data about the program is sent out and the StarSite signal demodulator is demodulated in the television to demodulate the StarSite broadcast, the TV is equipped with the StarSite memory to store the program scheduled to be broadcasted on the same day and transmitted by a specific broadcasting station. The broadcast method has a function of searching for a broadcast type according to the present invention.

For example, a PBS station in the United States sends StarSite data for two hours from 00 AM to 02 AM, demodulates the StarSight signal from the television, and stores the demodulated data in the StarSite memory. When a user wants to search for a type of program (eg, "sports" broadcast) designated by the user, each broadcasting station automatically searches for a broadcast time and a corresponding channel of a sports program scheduled to be broadcasted on the day and displays it on the screen.

In this case, however, StarSite broadcast signals must be received when the TV is turned on due to the characteristics of the StarSite broadcast. At this time, all the components except the microcomputer remain “OFF” in the TV. In order to receive the broadcast, the user had to turn on the power of the television every time a StarSite broadcast signal was transmitted. In addition, there is a problem that the monitor is also operated by the user, so that power is unnecessarily wasted.

The present invention is to solve the above problems, an object of the present invention is to automatically set each component of the TV except the monitor when the time when the start of the star site broadcast in accordance with the program stored in the star site memory is set in advance It receives the StarSight broadcast signal, demodulates it, converts it into StarSite data, stores this data in StarSite memory, and automatically stops each component inside the TV except the microcomputer at the end of the StarSite broadcast. The present invention provides a method for driving a power source when receiving a StarSite broadcast to automatically control a StarSite broadcast reception state.

A characteristic of the method for driving a power source for receiving a starsite broadcast according to the present invention for achieving the above object is signal processing of an externally applied starsite broadcast signal, demodulated signal processed data and stored in a starsite memory. A method for driving a power source when receiving a star site broadcast; Checking the current time at the microcomputer to determine whether the current time is the same as the time at which the starsite broadcast was started; Controlling the supply of a constant voltage from the regulator to the tuner and the intermediate frequency inspection and signal processing means in the microcomputer; Controlling the on-off operation of the motor by outputting a control signal from the microcomputer and switching the application of high pressure to the monitor; Receive the starsite data applied from the intermediate frequency inspection and signal processing means and demodulated by the starsite signal demodulation means and stored in the starsite memory; It is determined that the current time is the same as the time when the StarSite broadcast is finished so that the process of controlling the operation of the regulator and the flyback transformer is performed.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of a method for driving a power source for receiving a starsite broadcast according to the present invention will be described in detail.

FIG. 1 is a schematic block diagram for performing a method for driving a power source when receiving a StarSite broadcast according to the present invention. The power supply unit 1 is a main power source that is applied, i. AC power is supplied to the microcomputer 2 and other systems after converting to a constant DC voltage (+ B1). The microcomputer 2 is operated by an operating power source (+ B1) applied from the power supply unit 1 and outputs a control signal for controlling the system according to a control signal applied from the outside and a program stored in the starsite memory 3. At the same time, StarSite data is received from the StarSight signal demodulator 4, and this data is stored in the StarSite memory 3, and StarSite data is detected from the StarSite memory 3 as necessary to detect this data. To output this data to a television monitor (not shown). The regulator 5 is controlled on-off by receiving the control signal C1 from the microcomputer 2 and applied from the power supply unit 1 when it is turned on by the control signal C1 of the microcomputer 2. The tuner 6 and the IF processor 7 are supplied by supplying the operating power (+ B2) to the tuner 6 and the intermediate frequency detection and signal processor (hereinafter, abbreviated as "IF processor": 7) by receiving a constant voltage (+ B1). Turn on). The tuner 6 receives the operating power (+ B2) from the regulator 5 and is turned on to tune the broadcast signal applied from the antenna 8. The IF processor 7 is turned on by receiving the control signal C2 applied from the microcomputer 2 and the driving power source + B2 applied from the regulator 5 to output a high frequency broadcast signal applied from the tuner 6. Converts the signal to an intermediate frequency, processes the signal, and outputs the processed signal to a television monitor (not shown) and the starsite signal demodulator 4, and simultaneously outputs a control signal to the switching unit 9. The switching unit 9 is controlled. The star sight signal demodulation section 4 is driven by the drive voltage (+ B1) applied from the power supply section 1, demodulates the broadcast signal signal-processed by the IF processing section 7, and sends this information to the microcomputer 3. Is authorized. The StarSite memory 3 checks the StarSite broadcasting time and simultaneously executes a program stored in the microcomputer 2 when the corresponding broadcast time arrives. This information is output to a television monitor (not shown) as required by (2).

On the other hand, the switching section 9 is composed of a pull-up resistor R1 and a switching transistor Q1, and is controlled on-off in accordance with a control signal applied from the IF processing section 7 from a constant voltage source (not shown). The constant voltage Vcc to be applied is switched to be applied to the flyback transformer 10. The frieback transformer 10 converts the applied constant voltage Vcc by the switching operation of the switching unit 9 into the high voltage required for driving the monitor (not shown) and applies the converted high voltage to the monitor.

The operation of the block diagram configured as described above will be described with reference to FIG.

The microcomputer 2 maintains the standby state by the constant voltage (+ B1) applied from the power supply unit 1. The microcomputer 2 in the standby state checks the current time (S1). The microcomputer 2 determines whether the current time checked in the above step S1 is the same as the start time of the start broadcast site programmed in the starsite memory 3 (S2). If it is determined at this step (S2) that the current time is not the same as the time at which the starsite broadcast is started, the microcomputer 2 controls the system to perform a general television broadcasting function (S3) and at the same time ( Returning to S2), it is determined whether or not the current time is the beginning of the start of star site broadcasting. If it is determined in step S2 that the current time is the same as the time at which the starsite broadcast is started, the microro computer 2 outputs a control signal C1 of "high" state to the regulator 5 (S4). ), The regulator 5 is operated. When the regulator 5 is operated, the constant voltage of + B1 applied from the power supply unit 1 is converted into a constant voltage of + B2 and supplied to the tuner 6 and the IF processing unit 7, and the tuner receiving the constant voltage (+ B2). (6) and the IF processing section 7 are driven to receive the starsite broadcast and signal processing, and then output the starsite data to the monitor (not shown) and the starsite signal demodulation section 4. The star sight signal demodulation section 4 outputs the star sight data applied from the IF processing section 7 to the microcomputer 2. The microcomputer 2 outputs the control signal C2 in the " low " state to the IF processor 7 (S5). The IF processor 7 which has received the control signal C2 in the "low" state from the microcomputer 2 outputs the control signal in the "low" state to the base of the switching transistor Q1 in the switching unit 9, , The switching transistor Q1 receiving the control signal in the "low" state is "turned on" and passes the constant voltage Vcc applied from the constant voltage source (not shown) to the ground through the switching transistor Q1. Let's do it. Therefore, since the constant voltage Vcc is not supplied to the flyback transformer 10, the flyback transformer 10 is not operated. Since the flyback transformer 10 is not operated, a high pressure is not applied to the monitor (not shown), so that the monitor is not operated. The microcomputer 2 transfers the starsite data applied from the starsite signal demodulator 4 to the starsite memory 3 (S6), and the starsite memory 3 stores the applied starsite data. The microcomputer 2 determines whether the current time is the time at which the StarSite broadcast ends (S7). If it is determined in this step S7 that the current time is not the time at which the starsite broadcast ends, the microcomputer 2 returns to the step S6 above to apply the starsite data applied from the starsite signal demodulator 4. Is stored in the starsite memory (3). If it is determined in step S7 that the current time is the time at which the starsite broadcast ends, the microcomputer 2 outputs the control signal C1 of the "low" state to the regulator 5 (S8). The regulator 5, which has received the control signal C1 in the " low " state from the microcomputer 2, is " turned off " so that the constant voltage + B2 is applied to the tuner 6 and the IF processor 7. Stop it. The microcomputer 2 blocks the control signal C2 applied to the IF processing unit 7 (S9) and controls the switching unit 9 to maintain the mute state.

As described above, according to the method for driving power when receiving a StarSight broadcast according to the present invention, when a predetermined time when the StarSight broadcast signal is applied when the TV is off, the remaining components except for the TV monitor are automatically turned on. By programming the microcomputer, StarSite does not need to turn on the main power at the start of the broadcast time, which is convenient for the user, and the monitor remains off even when the main power is turned on, thereby reducing power consumption. There is an advantage to this.

Claims (1)

A method for driving a power source for receiving a StarSight broadcast, the signal processing of an externally applied StarSight broadcast signal, demodulating the signal-processed data, and storing it in a StarSite memory; Checking the current time at the microcomputer to determine whether the current time is the same as the time at which the starsite broadcast was started; Controlling the supply of a constant voltage from the regulator to the tuner and the intermediate frequency detection and signal processing means in the microcomputer; Controlling the on-off operation of the monitor by outputting a control signal from the microcomputer to switch the application of high pressure to the monitor; Receive the starsite data, which is applied from the intermediate frequency detection and signal processing means and demodulated by the starsite signal demodulation means, and stored in the starsite memory; A method for driving a power source when receiving a StarSite broadcast, which performs a process of controlling the operation of the regulator and the flyback transformer by determining whether the current time is the same as the end of the StarSite broadcast.