KR20040006257A - Heater power control circuit for saving power in monitor - Google Patents

Abstract

PURPOSE: A heater power control circuit for saving monitor power is provided to supply power for a heater of a monitor CRT continuously by using a dummy flyback transformer in suspend or normal mode. CONSTITUTION: A heater power control circuit for power saving of a monitor includes a personal computer(10) for outputting R/G/B color signals and horizontal/vertical synchronizing signals according to the manipulation of a user, and a microcomputer(11) for determining the operation mode of a monitor according to the horizontal/vertical synchronizing signals and the frequency. A horizontal/vertical synchronization processor(12) outputs vertical driving signals to a vertical output part(13) by receiving the horizontal/vertical synchronizing signals output from the microcomputer, and outputs horizontal driving signals to horizontal deflection part(18). First and second amplification parts(14,15) carry out the first and second amplification of the R/G/B color signals. A power transformer(20) transforms the power rectified by a rectifier(21) to generate power voltages required for respective operations of component parts and circuits of the monitor. A power control part(22) receives the feedback voltages output from the power transformer to control the operation of the power transformer. A first power saving mode control circuit(19) provides the output voltage from the power transformer to the microcomputer. A dummy flyback transformer(17) provides a preset voltage to the horizontal deflection part according to an output signal from the vertical/horizontal synchronization processor and a predetermined voltage to a heater of a CRT(16).

Description

Heater power control circuit for power saving of the monitor {HEATER POWER CONTROL CIRCUIT FOR SAVING POWER IN MONITOR}

The present invention relates to a video display device, and more particularly, to a heater power control circuit for power saving of a monitor.

1 is a block diagram of a heater power control circuit for power saving of a conventional monitor.

Referring to FIG. 1, a heater power control circuit for power saving of a conventional monitor includes a personal computer 10 that outputs an R / G / B color signal and a horizontal / vertical synchronization signal according to a user's operation, and a horizontal / vertical synchronization. The microcomputer 11 determines the operation mode of the monitor according to the signal configuration and the frequency, and outputs a vertical driving signal to the vertical output unit 13 by receiving the horizontal / vertical synchronization signal output from the microcomputer 11 and horizontally. Horizontal deflection output according to the horizontal / vertical synchronization processor 12 which outputs the horizontal drive signal to the deflection unit 18, and a predetermined voltage (preferably 6.3 V) in accordance with the output signal of the vertical / horizontal synchronization processor 12. A dummy flyback transformer 17 provided to the unit 18, a primary amplifier 14 for primary amplifying the R / G / B color signal output from the personal computer 10 to a predetermined level, and primary amplification Secondary amplification of the R / G / B color signal outputted from the unit 14 to a predetermined level is performed. Each component circuit of the monitor is transformed by converting the secondary amplifier 15 outputted to the air pipe 16, the rectifier 21 for rectifying the input AC power, and the power rectified and outputted from the rectifier 21. Alternatively, a power transformer 20 for generating operating power required for operation of each element, a power control unit 22 for controlling the operation of the power transformer by receiving an output voltage of the power transformer 20, and a power transformer ( A first power saving mode control circuit 19 for providing the microcomputer 11 with information on the output voltage of the signal 20 and a second power saving for controlling the output of the power transformer 20 according to the DPM control signal of the microcomputer 11; The mode control circuit 30 is comprised. Here, reference numeral 23 denotes a flyback transformer for providing various voltages to the CRT 16.

The operation of the heater power control circuit for power saving of the conventional monitor configured as described above will be described with reference to FIGS. 1 to 2.

The personal computer 10 outputs an R / G / B color signal and a horizontal / vertical synchronization signal (H / V Sync) to the microcomputer 11 according to a user's operation. The microcomputer 11 determines an operation mode according to the configuration and frequency of the horizontal / vertical synchronization signal and transmits the horizontal / vertical synchronization signal (H / V Sync) to the horizontal / vertical synchronization processor 12. The horizontal / vertical synchronization processor 12 receives a horizontal / vertical synchronization signal (H / V Sync) output from the microcomputer 11 and outputs a vertical driving signal, that is, a vertical ramp waveform, to the vertical output unit 13. The horizontal deflection section 18 outputs a horizontal drive signal.

In addition, the R / G / B color signal output from the personal computer 10 is transmitted to the primary amplifier 14, and then amplified to a predetermined level via the secondary amplifier 15, and then the CRT 16 ) Is entered.

On the other hand, the rectifier 21 performs the operation of rectifying the AC (AC) power, the power transformer 20 transforms the power rectified in the rectifier 21 to create and provide the operating power required for the operation of each monitor component The power control unit 22 receives the output voltage of the power transformer 20 to control the operation of the power transformer 20, and the second power saving mode control circuit 30 is a photocoupler associated with the power control unit 22. In operation 32, a predetermined control signal is output to the power control unit 22 so that the power transformer 20 operates in a normal operation or a power saving mode according to the DPM control signal of the microcomputer 11.

Here, the second power saving mode control circuit 30 is configured as shown in Figure 2, the control operation is as follows. When the monitor is operating in Standby / Suspend mode, the DPMF signal goes low and the voltage-down circuit 33 connected to the photocoupler 32 operates to reduce the secondary output voltage to about 80%. . At this time, the DPMS signal is at a high level to supply a 6.3V voltage to the heater of the CRT 16 as shown in the path (a-b) shown in FIG.

However, during the DPM off mode operation, since the DPMS signal is at the low level in the above-described state, the switch for controlling the power supply is turned off, and the voltage provided to the heater of the CRT 16 is cut off.

Through the power saving mode described above, power consumption during operation of the monitor can be minimized.

However, such a conventional monitor tends to increase the number of parts to support this as the functions added for the convenience of the user are increased, and the circuit of each element is complicated. On the other hand, trends in product size are increasingly designing smaller and more compact products.

Therefore, it is highly desirable if the heater power control circuit for power saving of the monitor described above can implement the same function using the components of the existing circuit without using the second power saving mode control circuit 30 shown in FIG. something to do.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the prior art mentioned above, and provides a heater power control circuit for power saving of a monitor configured to provide a power supply to a heater of a CRT of a monitor in a dummy flyback transformer. It is to provide.

Another object of the present invention is to provide a heater power control circuit for power saving of a monitor that can implement the heater power control circuit for power saving of the monitor using a minimum number of components.

1 is a block diagram of a heater power control circuit for saving power of a conventional monitor.

FIG. 2 is a block diagram illustrating a second power saving mode control circuit shown in FIG. 1.

3 is a block diagram of a heater power control circuit for power saving of a monitor according to the present invention;

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

10: personal computer

11: micom

12: vertical / horizontal synchronous processor

13: vertical deflection output unit

14: primary amplifier

15: secondary amplifier

16: CRT

17: Dummy Flyback Transformer

18: horizontal deflection output unit

19: power saving mode control circuit

20: power transformer

21: rectifier

22: power control unit

23: Flyback Transformer

In order to achieve the above object, the heater power control circuit for power saving of the monitor according to the present invention is a microcomputer to determine the operation mode of the monitor according to the configuration and frequency of the horizontal / vertical synchronization signal provided from the personal terminal, and A horizontal / vertical sync processor that receives the horizontal / vertical sync signal output from the microcomputer and outputs a vertical drive signal or a horizontal sync signal, and outputs a preset voltage according to the output signal of the vertical / horizontal sync processor, It is characterized by consisting of a dummy flyback transformer for providing a predetermined voltage to the heater.

Here, when the dummy flyback transformer outputs a horizontal synchronization signal from the vertical / horizontal synchronization processor, the dummy flyback transformer continuously provides the power output from the secondary side of the dummy flyback transformer to the heater of the CRT regardless of the current mode. It is desirable to.

Hereinafter, with reference to the accompanying drawings will be described the configuration and operation of the present invention.

3 is a block diagram of a heater power control circuit for power saving of a monitor according to the present invention.

Referring to FIG. 3, a heater power control circuit for power saving of a monitor according to the present invention includes a personal computer 10 that outputs an R / G / B color signal and a horizontal / vertical synchronization signal according to a user's operation. The microcomputer 11 determines the operation mode of the monitor according to the configuration and the frequency of the vertical synchronization signal, and receives the horizontal / vertical synchronization signal output from the microcomputer 11 and outputs a vertical driving signal to the vertical output unit 13. First and second amplification for horizontally / vertically synchronizing processor 12 for outputting a horizontal drive signal to the horizontal deflection unit 18, and for first amplifying the R / G / B color signal output from the personal computer 10 to a predetermined level. A secondary amplifier 15 for secondary amplifying the R / G / B color signal output from the primary amplifier 14 to a predetermined level and outputting it to the CRT 16; AC) rectifying unit 21 for rectifying the power and the power rectified by the rectifying unit 21 is transformed to A power transformer 20 for generating an operating power required for the operation of each component circuit or element of the controller; and a power controller 22 for controlling the operation of the power transformer by receiving feedback from an output voltage of the power transformer 20. And a voltage set in advance according to the first power saving mode control circuit 19 which provides the output voltage of the power transformer 20 to the microcomputer 11 and the output signal of the vertical / horizontal synchronization processor 12 (preferably 6.3 V) is provided to the horizontal deflection output 18, and is provided with a dummy flyback transformer 17 for providing a predetermined voltage to the heater of the CRT.

Referring to the operation of the heater power control circuit for power saving of the monitor according to the present invention configured as described above are as follows.

The personal computer 10 outputs an R / G / B color signal and a horizontal / vertical synchronization signal (H / V Sync) to the microcomputer 11 according to a user's operation. The microcomputer 11 determines an operation mode according to the configuration and frequency of the horizontal / vertical synchronization signal and transmits the horizontal / vertical synchronization signal (H / V Sync) to the horizontal / vertical synchronization processor 12. The horizontal / vertical synchronization processor 12 receives a horizontal / vertical synchronization signal (H / V Sync) output from the microcomputer 11 and outputs a vertical driving signal, that is, a vertical ramp waveform, to the vertical output unit 13. The horizontal deflection section 18 outputs a horizontal drive signal.

In addition, the R / G / B color signal output from the personal computer 10 is transmitted to the primary amplifier 14, and then amplified to a predetermined level via the secondary amplifier 15, and then the CRT 16 ) Is entered.

On the other hand, the rectifier 21 performs the operation of rectifying the AC (AC) power, the power transformer 20 transforms the power rectified in the rectifier 21 to create and provide the operating power required for the operation of each monitor component In addition, the power control unit 22 receives the output voltage of the power transformer 20 and controls the operation of the power transformer 20.

Here, the secondary side (auxiliary winding) power supply of the monitor dummy flyback transformer 17 continuously supplies power to the heater of the CRT 16 when the monitor is in the normal mode or the suspend mode.

Therefore, even when the user does not use the monitor for a predetermined time, the heater of the CRT 16 is continuously supplied even when the current mode is transitioned to the suspend mode, thereby minimizing power when returning from the suspend mode to the normal mode. A screen return can be made in a draft. That is, when there is a horizontal synchronization signal (H-Sync), the power output from the secondary side of the dummy flyback transformer 17 is supplied to the heater of the CRT 16, and the horizontal synchronization signal (H-Sync) is not output. When not, since the dummy flyback transformer 17 does not operate, the power supplied to the heater of the CRT 16 is automatically cut off.

As described above, in the prior art, the power saving mode control circuit for controlling the power supply of the heater in the power saving mode (DPM / OFF.DPMS) should be configured separately, but in the present invention, in the case of the suspension and the normal mode, the dummy A flyback transformer is used to continuously power the heater in the monitor's CRT. That is, even if a separate power saving mode control circuit is not used to solve the power saving mode, the dummy flyback transformer is provided to the heater of the CRT in the vertical / horizontal synchronous processor power saving mode depending on the presence of a horizontal sync signal (H-Sync). Automatic control of power supply

Claims (2)

A microcomputer for determining the operation mode of the monitor according to the configuration and frequency of the horizontal / vertical synchronization signal provided from the personal terminal; A horizontal / vertical synchronization processor for receiving a horizontal / vertical synchronization signal output from the microcomputer and outputting a vertical driving signal or a horizontal synchronization signal; And a dummy flyback transformer for outputting a predetermined voltage according to the output signal of the vertical / horizontal synchronization processor and providing a predetermined voltage to the heater of the CRT. The heater of claim 1, wherein when the dummy flyback transformer outputs a horizontal synchronization signal from the vertical / horizontal synchronization processor, the dummy flyback transformer receives power output from the secondary side of the dummy flyback transformer regardless of the current mode. Heater power control circuit for power saving of the monitor, characterized in that the continuous providing.