Power-supply control device, image processing apparatus, power-supply control method, and computer readable medium

Abstract

A power-supply control device includes a power-supply-state transition control section, body-capable-of-movement detection sections, a time measuring section, a transition-instruction section, and an instruction-provision-time postponement section. The power-supply-state transition control section shifts a state of an operation target section from one state to another state among power-supply states and a non-power-supply state. The body-capable-of-movement detection sections detect a body capable of movement in a region. The time measuring section measures a time over which the operation target section in one of the power-supply states is not used. The transition-instruction section provides, for the power-supply-state transition control section, an instruction for shifting to the non-power-supply state. The instruction-provision-time postponement section postpones an instruction-provision time at which the instruction is provided by the transition-instruction section.

1 . A power-supply control device comprising:
 a power-supply-state transition control section that shifts a state of an operation target section from one state to another state among a plurality of power-supply states and a non-power-supply state, the operation target section being a section which operates by receiving supply of power from a mains power source section, a power consumption in each of the plurality of power-supply states being a corresponding one of power consumptions different from one another, the non-power-supply state being a state in which supply of power is not received from the mains power source section or a state in which supply of power that is lower than power determined in advance and that is necessary for control of determining whether or not power is to be supplied is received from the mains power source section;   a plurality of body-capable-of-movement detection sections that detect a body capable of movement in a region which is set in advance, each of the plurality of body-capable-of-movement detection sections having a corresponding one of detection conditions different from one another;   a time measuring section that measures a time over which the operation target section in one of the plurality of power-supply states is not used;   a transition-instruction section that provides, in a case in which the operation target section continues not being used even when the time measured by the time measuring section has reached a non-power-supply-state transition time that is determined in advance, for the power-supply-state transition control section, an instruction for shifting to the non-power-supply state; and   an instruction-provision-time postponement section that postpones, in a case in which the body capable of movement is detected by the plurality of body-capable-of-movement detection sections when an instruction-provision time at which the instruction is provided by the transition-instruction section has arrived, the instruction-provision time.   
     
     
         2 . The power-supply control device according to  claim 1 ,
 wherein an opportunity for shifting to one of the plurality of power-supply states includes a first opportunity provided by inputting an external signal to the operation target section, and a second opportunity provided by detecting the body capable of movement with the plurality of body-capable-of-movement detection sections, and   wherein the non-power-supply-state transition time in a case in which the state of the operation target section has been shifted to the power-supply state because the second opportunity has been provided is set so as to be longer than the non-power-supply-state transition time in a case in which the state of the operation target section has been shifted to the power-supply state because the first opportunity has been provided, the non-power-supply-state transition time being a time measured until the state of the operation target section is shifted to the non-power-supply state.   
     
     
         3 . The power-supply control device according to  claim 1 , wherein, in one of the plurality of power-supply states, the non-power-supply-state transition time, which is measured until the state of the operation target section is next shifted to the non-power-supply state, is reduced as the number of times the plurality of body-capable-of-movement detection sections have detected that the body capable of movement faces the operation target section increases. 
     
     
         4 . The power-supply control device according to  claim 2 , wherein, in one of the plurality of power-supply states, the non-power-supply-state transition time, which is measured until the state of the operation target section is next shifted to the non-power-supply state, is reduced as the number of times the plurality of body-capable-of-movement detection sections have detected that the body capable of movement faces the operation target section increases. 
     
     
         5 . The power-supply control device according to  claim 1 , wherein one of a plurality of types of sensors, an operation determination function, a combination of one of the plurality of types of sensors and the operation determination function, at least two of the plurality of types of sensors, or a combination of at least two of the plurality of types of sensors and the operation determination function is selected as the plurality of body-capable-of-movement detection sections, each of the plurality of types of sensors having a detection region in which the body capable of movement is detectable and a detection distance within which the body capable of movement is detectable, at least one of the detection region and the detection distance of each of the plurality of types of sensors being different from each of the detection regions or the detection distances of the plurality of types of sensors other than the type of sensor, the operation determination function being a function of determining whether or not an operation associated with the operation target section has been performed. 
     
     
         6 . The power-supply control device according to  claim 5 , the plurality of types of sensors include a pyroelectric sensor that distinguishes between a state in which the body capable of movement is approaching the operation target section and states other than the state, and a reflection-type sensor that distinguishes between a state in which the body capable of movement faces the operation target section and states other than the state. 
     
     
         7 . The power-supply control device according to  claim 6 , wherein, when the state of the operation target section is shifted to one of the plurality of power-supply states by the power-supply-state transition control section, a signal system used for a signal that is input from the pyroelectric sensor is disabled, and power necessary for control based on the signal is interrupted. 
     
     
         8 . The power-supply control device according to  claim 1 ,
 wherein the non-power-supply state includes a sleep mode, and the plurality of power-supply states include a warm-up mode, a standby mode, and a running mode, the sleep mode being a mode in which power is supplied only to a control system associated with the plurality of body-capable-of-movement detection sections, the warm-up mode being a mode that is provided at a preparatory stage at which preparation for activation of the operation target section from the sleep mode is made, the standby mode being a mode in which power lower than power that is in a steady state is supplied to the operation target section, the running mode being a mode in which power that is in the steady state is supplied to the operation target section, and   wherein the instruction that is provided by the transition-instruction section is a cycle-down instruction for a case of shifting from the standby mode to the sleep mode.   
     
     
         9 . The power-supply control device according to  claim 8 , wherein an awake mode is set in the sleep mode, the awake mode being a mode in which power is supplied to an input section that inputs command information in order to cause the operation target section to operate when it has not been determined yet whether or not the body capable of movement is a user who intends to use the operation target section although the body capable of movement is detected. 
     
     
         10 . The power-supply control device according to claim  9 , wherein, in a case of providing the instruction using the transition-instruction section after the non-power-supply-state transition time, which is determined in advance, has elapsed, or in a case of providing the instruction using the transition-instruction section after the instruction-provision time is postponed by the instruction-provision-time postponement section, at least a notification prompting an input operation using the input section is provided, and, in a case in which the input operation using the input section is not performed even when a time period over which the notification is provided and which is specified in advance in the notification has elapsed, the instruction is provided by the transition-instruction section. 
     
     
         11 . An image processing apparatus comprising:
 the power-supply control device according to  claim 1 ; and   at least one of an image reading section, an image forming section, and a facsimile-communication control section, the image reading section reading an image from a document image, the image forming section forming an image on a recording sheet on the basis of image information, the facsimile-communication control section transmitting an image to a transmission destination in accordance with a communication procedure which is mutually determined in advance,   wherein the image reading section, the image forming section, and the facsimile-communication control section perform each of image processing functions by cooperating with each other, the image processing functions being specified by a user and including an image reading function, an image forming function, an image copy function, a facsimile reception function, and a facsimile transmission function.   
     
     
         12 . A power-supply control method comprising:
 shifting a state of an operation target section from one state to another state among a plurality of power-supply states and a non-power-supply state, the operation target section being a section which operates by receiving supply of power from a mains power source section, a power consumption in each of the plurality of power-supply states being a corresponding one of power consumptions different from one another, the non-power-supply state being a state in which supply of power is not received from the mains power source section or a state in which supply of power that is lower than power determined in advance and that is necessary for control of determining whether or not power is to be supplied is received from the mains power source section;   detecting, on detection conditions different from one another, a body capable of movement in a region which is set in advance;   measuring a time over which the operation target section in one of the plurality of power-supply states is not used;   providing, in a case in which the operation target section continues not being used even when the measured time has reached a non-power-supply-state transition time that is determined in advance, an instruction for shifting to the non-power-supply state; and   postponing, in a case in which the body capable of movement is detected when an instruction-provision time at which the instruction is provided has arrived, the instruction-provision time.   
     
     
         13 . A computer readable medium storing a program causing a computer to execute a process for controlling supply of power, the process comprising:
 shifting a state of an operation target section from one state to another state among a plurality of power-supply states and a non-power-supply state, the operation target section being a section which operates by receiving supply of power from a mains power source section, a power consumption in each of the plurality of power-supply states being a corresponding one of power consumptions different from one another, the non-power-supply state being a state in which supply of power is not received from the mains power source section or a state in which supply of power that is lower than power determined in advance and that is necessary for control of determining whether or not power is to be supplied is received from the mains power source section;   detecting, on detection conditions different from one another, a body capable of movement in a region which is set in advance;   measuring a time over which the operation target section in one of the plurality of power-supply states is not used;   providing, in a case in which the operation target section continues not being used even when the measured time has reached a non-power-supply-state transition time that is determined in advance, an instruction for shifting to the non-power-supply state; and   postponing, in a case in which the body capable of movement is detected when an instruction-provision time at which the instruction is provided has arrived, the instruction-provision time.