Reducing power consumption in monitor by switching off heater power in power-off mode
First Claim
1. An apparatus for controlling the power management of a display monitor, said apparatus comprising:
- a power supply unit for converting an AC input voltage to a DC output voltage;
a voltage regulator for producing a constant output voltage supplied to the monitor;
a transformer for producing necessary operating voltages for each part of the monitor, in which the output voltage of the voltage regulator being supplied to a primary of the transformer;
a feedback circuit for detecting current variation at the output of the transformer and for supplying the detected variation value to the voltage regulator;
a switching circuit provided in a heater power supply line between one output of the transformer and a heater of a color display tube of the monitor for switching off the heater power supply line when the monitor enters a power-off mode;
a microcomputer operated in response to a video signal received at a video input port of the monitor to produce a power control signal and a corresponding control mode indicating signal;
a signal input port connected to a video output of a computer; and
a signal amplifier for amplifying and processing a video input signal supplied to a signal input of the color display tube.
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Accused Products
Abstract
An apparatus for controlling the power management of a display monitor includes: a switching circuit provided in a power supply line between one output of a power supplying transformer and a heater of a color display tube for directly switching off the power supply line when the monitor enters the power-off mode. Also, a mode indicator may also be provided for indicating the power-off mode of the monitor. A microcomputer operates in response to the power-off mode to generate a high-level control signal supplied to the switching circuit and to the mode indicator. Also, a continuous pulse train signal having a predetermined on/off pulse duration is generated, representing the power-off mode. When both a high level control signal and the pulse train signal are supplied to the mode indicator, a power-off mode indicating operation using one LED is possible.
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Citations
10 Claims
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1. An apparatus for controlling the power management of a display monitor, said apparatus comprising:
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a power supply unit for converting an AC input voltage to a DC output voltage; a voltage regulator for producing a constant output voltage supplied to the monitor; a transformer for producing necessary operating voltages for each part of the monitor, in which the output voltage of the voltage regulator being supplied to a primary of the transformer; a feedback circuit for detecting current variation at the output of the transformer and for supplying the detected variation value to the voltage regulator; a switching circuit provided in a heater power supply line between one output of the transformer and a heater of a color display tube of the monitor for switching off the heater power supply line when the monitor enters a power-off mode; a microcomputer operated in response to a video signal received at a video input port of the monitor to produce a power control signal and a corresponding control mode indicating signal; a signal input port connected to a video output of a computer; and a signal amplifier for amplifying and processing a video input signal supplied to a signal input of the color display tube. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus for controlling the power management of a display monitor having a color display tube, said apparatus comprising:
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a power supply means for supplying power to the monitor including supplying a heater voltage to a heater of the color display tube; a switching circuit disposed between said power supply means and said heater of the color display tube for selectively switching off the voltage to said heater when the monitor enters a power-off mode; and a control means connected to said switching circuit and receiving a video signal at a video input port of the monitor and for producing a power control signal in response thereto for controlling said switching circuit. - View Dependent Claims (8)
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9. A method of controlling the power utilized by a display monitor having a color display tube, said method comprising:
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providing necessary operating voltages to the monitor including a heater voltage for supplying a heater of the color display tube of the monitor; receiving a video signal at a video input port of the monitor and generating a power control signal in response thereto; and selectively switching off the heater voltage to the heater of the color display tube in response to the power control signal. - View Dependent Claims (10)
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Specification