Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source
Reexamination Certificate
2000-05-26
2001-11-13
Riley, Shawn (Department: 2838)
Electrical transmission or interconnection systems
Plural supply circuits or sources
Substitute or emergency source
C307S064000
Reexamination Certificate
active
06316844
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a standby power supply circuit with a low power consumption which is capable of reducing a power consumption of electric instruments in a standby state that is waiting for a signal to be outputted from a wireless remote-controller.
2. Description of the Background Art
FIG. 1
is a schematic block diagram of a standby power supply circuit in accordance with a conventional art.
With reference to
FIG. 1
, when a rectifier
101
receives a commercially used AC power source, rectifies it and outputs a DC voltage to a standby power supplier
104
, the standby power supplier
104
which was in a standby state supplies the electric power to a relay driver
103
, an infrared ray receiver
105
and a microcomputer
107
. The relay driver
103
controls the ON/OFF operation of a relay
102
.
When a user operates a remote controller
100
and a power-ON signal is outputted from the remote-controller
100
, the infrared ray receiver
105
receives the power-ON signal and outputs it to the microcomputer
107
. Then, the microcomputer
107
controls the relay
102
to be turned on or turned off through the relay driver
103
, thereby outputting of the power supply of a main power supplier
106
.
Generally, with regard to the electric instruments operated by the remote-controller, if no electric power is supplied to the electric instruments, the electric instruments are in a standby state until the power is supplied thereto. Furthermore, in order for the electric instruments to be readily switched from the OFF state or the standby state to the power-ON state, the electric instruments include the standby power supplier
104
for supplying the power in the standby state.
Accordingly, when the power-ON signal is outputted from the remote. controller as a user operates the remote-controller
100
, the infrared ray receiver
105
receives the power-ON signal and outputs it to the microcomputer
107
. Then, upon receipt of the power-ON signal, the microcomputer
107
controls the relay driver
103
or the main power supplier
106
so that electric power can be outputted from the main power supplier
106
.
However, generally, the electric instruments are in a standby state for a longer time than in the operating time, so that more power is consumed in the standby state, leaving a task that the power consumed in the standby state of the electric instruments should be effectively reduced.
SUMMARY OF THE INVENTION
Therefore, an object of the present invention is to provide a standby power supply circuit with low power consumption, which is capable of reducing power consumption of electric instruments when the electric instruments are in a standby state.
To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a standby power supply circuit with a lower power consumption including: a voltage converter for rectifying a commercially used AC power source to convert it to a DC voltage; a standby power supplier for receiving the DC voltage from the voltage converter; a voltage comparator for comparing the DC voltage outputted from the voltage converter with pre-set reference voltages and outputting a predetermined pulse signal; and a switch for ON/OFF controlling the operation of the voltage converters according to a pulse signal outputted from the voltage comparator.
Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description.
REFERENCES:
patent: 5220492 (1993-06-01), Rubin et al.
patent: 5334877 (1994-08-01), Mohan et al.
patent: 5477279 (1995-12-01), Chang
patent: 5657215 (1997-08-01), Faulk
patent: 0875983 (1998-04-01), None
Birch & Stewart Kolasch & Birch, LLP
LG Electronics Inc.
Riley Shawn
LandOfFree
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