Power interrupting circuit

专利摘要:
The present invention relates to a power interruption circuit, and more particularly, to supply power to the engine control unit in the normal operation of the printer, and to cut off the power supplied to the engine control unit when the printer is in a standby state to prevent power consumption in advance. It relates to a power interrupter circuit. According to an aspect of the present invention, there is provided a laser printer for controlling a power supply, the power supply unit supplying power and an engine control unit controlling power supplied from the power supply unit according to an operation state of the printer. A logic synthesizing element for outputting a signal obtained by logically logicing the data inputted from the option board unit, a central processing unit for outputting a high and low signal by the signal output from the logic synthesizing unit, and a signal outputting from the central processing unit And a power interrupter for controlling power supply by turning on / off the transistor. According to the present invention, by controlling the constant power supplied to the engine control unit according to the operating state of the printer, it is possible to prevent power consumption in advance and to use the power efficiently.
公开号:KR19990038551A
申请号:KR1019970058336
申请日:1997-11-06
公开日:1999-06-05
发明作者:권중기
申请人:윤종용；삼성전자 주식회사；
IPC主号:

专利说明:

Power interrupting circuit
The present invention relates to a power interruption circuit, and more particularly, to control a power supply to an engine control unit according to an operation state of a printer, thereby preventing power consumption and allowing the power to be used efficiently. It is about.
Today, office automation (OA) devices such as printers, copiers, scanners and fax machines are widely used. Each office automation device is being developed at high performance to expand its unique capabilities, resulting in more expensive products.
In general, laser printers have a trend of increasing current consumption of 5V as a whole as the number of additional mounting parts increases due to high speed, high functionality, and networking of the printer.
In addition, current consumption is inevitably functional during the operation of the printer. However, when the printer is not printed, such as in the standby state or in the sleep mode, this current occurs as a loss.
FIG. 1 is a part of a fan driving circuit embedded in a device such as a conventional laser printer, and includes a transistor TR for controlling fan operation by fan on / off. FIG. As the AC heater driving circuit diagram, the heater driving circuit diagram of FIG. 2 does not interrupt the power supply of 5V to reduce the power consumption in the sleep mode of the printer, but disables the operation of the fan or the meter. The holding torque current was interrupted, or the drive system current such as the interruption of the power supply of the AC heater was interrupted.
However, in the conventional laser printer, 5V current is not a driving source in the sleep mode, so that a constant current is continuously applied while the printer is in operation or in standby, resulting in current consumption. For example, assuming that the inklet printer is still in the ON state, a current of 5 V continues to flow, causing a problem such as generating a lot of power loss.
The present invention has been made to solve the conventional problems as described above, the object of which is to supply a constant power to the engine control unit in the normal operation of the printer, and to the engine control unit when the printer is in a standby state or do not print for a certain time The present invention provides a power interruption circuit that cuts off a constant power supply to prevent a lot of power consumption and to efficiently use the power supply.
1 is a part of a fan driving circuit embedded in a device such as a conventional laser printer,
2 is a general conventional AC heater driving circuit diagram;
3 is a circuit diagram of the present invention for power interruption.
<Description of the code used for the main part of the drawing>
100: power supply unit 200: engine control unit
300: Option board 201: Logic device
202: central processing unit 203: transistor
204: power interrupter
In order to achieve the above object, the present invention provides a laser printer for controlling a power supply, comprising: a power supply for supplying the power, and an engine controller for controlling power supplied from the power supply according to the state of the printer; The engine control unit may include a logic sum element for logic and outputting a signal obtained by logically inputting data from an option board unit, a central processing unit for outputting a high and low signal based on a signal output from the logic sum element, and the central processing unit. It characterized in that it comprises a transistor for turning on / off by the signal output from the power supply and the power control section for controlling the power supply by the on / off of the transistor.
Hereinafter, a configuration according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
3 is a circuit diagram of the present invention for power interruption, and as shown therein, a power supply unit 100 for supplying power, and an engine controller 200 for controlling power supplied from the power supply unit according to an operation state of a printer. The engine control unit 200 may include a logic unit 201 for outputting a signal obtained by logicalizing and logicting data received from the option board unit 300, and high and low by a signal output from the logic unit. A central processing unit 202 for outputting a signal, a transistor 203 for turning on / off by a signal output from the central processing unit, and a power interrupter 204 for controlling power supply by turning on / off of the transistor It is composed of
Referring to the effects of the present invention configured as described above are as follows.
First, in the normal operation of the printer, the central processing unit 202 in the engine control unit 200 supplies a low (L) signal to the base side of the transistor 203 so that the transistor 203 is turned off. At this time, the power supplied from the power supply unit 100 (about 5V) is applied to the image control unit, the network control unit, and the memory unit in the option board unit 300 through the contact switch S1 of the relay in the power intermittent unit 204, respectively. .
In this state, when the printer is in a standby state, there is no input / output of data for a predetermined time or there is no printing activity, the CPU 202 counts the time and enters a sleep mode. At this time, the central processing unit 202 turns on the transistor 203 by supplying a high (H) signal to the base side of the transistor 203.
When the transistor 203 is turned on in this way, the contact switch S1 of the relay is connected to the b contact terminal. Therefore, the power (about 5V) supplied from the power supply unit 100 is connected to the b contact terminal of the relay. Bypassing the collector and emitter side, the power from the engine control unit 200 is cut off.
In this state, when data comes from the PC, i.e., from the option board unit 300, or an interrupt signal is received, the CPU 202 is in an up mode, and the low level L is applied to the base side of the transistor 203. By turning off the transistor 203 by supplying a signal, the contact switch S1 of the relay is connected to a contact, so that a constant power (about 5 V) is supplied from the engine controller 200 to perform normal operation.
The present invention operated as described above provides a constant power supply from the engine control unit when the printer is in normal operation and power consumption by cutting off the power supplied to the engine control unit when the printer is in a standby state or does not print for a predetermined time. There is an advantage that can be prevented in advance and the power can be used efficiently.

权利要求:
Claims (2)
[1" claim-type="Currently amended] In the laser printer for controlling the power supply,
A power supply unit for supplying the power;
The power supply from the power supply according to the operating state of the printer includes an engine control unit for controlling the power,
The engine control unit includes: a logic sum element configured to logic data inputted from the option board unit and output a logic signal;
A central processing unit for outputting a high and low signal by the signal output from the logic sum element;
A transistor turned on / off by a signal output from the central processing unit;
And a power interrupter for controlling power supply by turning on / off the transistor.
[2" claim-type="Currently amended] The method of claim 1,
A power interruption circuit for supplying a predetermined power to the engine control unit during the normal operation of the printer and to cut off the power supplied to the engine control unit when the printer is in the standby state.

类似技术:

---

公开号 | 公开日 | 专利标题

---

US7894085B2|2011-02-22|Image forming apparatus and method of controlling same

---

EP2267576B1|2014-01-01|Interface card, network device having the same and control method thereof

---

DE69726030T3|2012-09-13|Printer and control method for it

---

JP3180816B2|2001-06-25|Laser printer power saving device

---

US7705485B2|2010-04-27|Power source and image forming apparatus

---

EP0685818B1|2001-11-14|Error control system and method for a printer

---

US8780389B2|2014-07-15|Image processing device for modifying operating mode

---

KR100243129B1|2000-02-01|Method of controlling power on/off and printer applied thereof

---

DE60200704T2|2005-07-14|An ink jet recording apparatus and control method for an ink jet recording apparatus

---

US5457516A|1995-10-10|Energy saving image-forming apparatus and control method therefor

---

US20020050936A1|2002-05-02|USB machine

---

US5758040A|1998-05-26|Energy-saving facsimile apparatus and energy-saving method for facsimile apparatus

---

US7176785B2|2007-02-13|Device control system

---

JP2011076073A|2011-04-14|Image forming device

---

US7290847B2|2007-11-06|IC chip, print apparatus, and heat generation warning method

---

JP2005132052A|2005-05-26|Image forming apparatus

---

US5629694A|1997-05-13|Computer keyboard with power control key

---

JP4796442B2|2011-10-19|Image forming apparatus and control method thereof

---

JP4366351B2|2009-11-18|Power supply control circuit, electronic device and recording apparatus

---

US5325209A|1994-06-28|Multiplex image forming apparatus

---

JP2007094929A|2007-04-12|Printing system and printer host apparatus

---

US7890784B2|2011-02-15|Power supplying mode switching controller, image forming apparatus, and image reading apparatus

---

US20030142515A1|2003-07-31|Printer to control power supply via a host

---

US20070058190A1|2007-03-15|Multi-function printer

---

JP2004202692A|2004-07-22|Image formation device

同族专利:

---

公开号 | 公开日

---

引用文献:

---

公开号 | 申请日 | 公开日 | 申请人 | 专利标题

---

法律状态:
1997-11-06|Application filed by 윤종용, 삼성전자 주식회사

---

1997-11-06|Priority to KR1019970058336A

---

1999-06-05|Publication of KR19990038551A

优先权:

---

申请号 | 申请日 | 专利标题

---

KR1019970058336A|KR19990038551A|1997-11-06|1997-11-06|Power interrupting circuit|