# US 10,122,880 B2 · Image forming apparatus

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- Number: US 10,122,880 B2
- Document ID: US10122880B2
- Status: Granted
- Kind: B2
- Application number: 15/819,831
- Filed: 2017-11-21
- Published: 2018-05-24
- Granted: 2018-11-06
- Earliest claimed: 2016-11-24
- Assignees: KYOCERA Document Solutions Inc.
- Applicants: KYOCERA Document Solutions Inc.
- Inventors: Yuichi Ninomiya
- Web page: https://patentgrep.com/patent/US10122880B2

## CPC

- H04N 1/00896: {using a low-power mode, e.g. standby}
- G03G 15/2039: {with means for controlling the fixing temperature}
- G03G 15/205: {specially for the mode of operation, e.g. standby, warming-up, error (G03G15/2046 takes precedence)}
- G03G 15/5004: {Power supply control, e.g. power-saving mode, automatic power turn-off}
- G03G 15/80: {Details relating to power supplies, circuits boards, electrical connections}
- H02S 20/30: Supporting structures being movable or adjustable, e.g. for angle adjustment
- H04N 1/00904: {Arrangements for supplying power to different circuits or for supplying power at different levels (H04N1/00896 takes precedence)}
- G03G 21/20: Humidity or temperature control {also ozone evacuation; Internal apparatus environment control}
- G03G 2215/00978: Details relating to power supplies
- G03G 2215/00983: using batteries
- G03G 2221/1696: for auxiliary devices, e.g. add-on modules
- H02J 7/35: with light sensitive cells
- H04N 2201/0094: Multifunctional device, i.e. a device capable of all of reading, reproducing, copying, facsimile transception, file transception
- Y02E 10/56: Power conversion systems, e.g. maximum power point trackers
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- H02S: GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES (obtaining electrical energy from radioactive sources G21H1/12; light sensitive inorganic semiconductor devices H10F; light sensitive organic semiconductor devices H10K30/00; thermoelectric devices H10N10/00; pyroelectric devices H10N15/00)
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

An image forming apparatus includes a fixing portion, a temperature detection portion, a power supply portion, a control portion, a photovoltaic module and a power storage/supply portion which stores power from the photovoltaic module and which performs power supply to the temperature detection portion when power supply from the power supply portion to the temperature detection portion is stopped. The control portion detects, when a return condition is satisfied, the temperature of the fixing portion based on the output of the temperature detection portion, and as a temperature on return is higher, the control portion starts fixing return processing at later timing whereas as the temperature on return is lower, the control portion starts the fixing return processing at earlier timing.

## Claims

### Claim 1

An image forming apparatus that has a normal mode and a power saving mode in which power consumption is reduced as compared with the normal mode and that returns to the normal mode when a predetermined return condition is satisfied in the power saving mode, the image forming apparatus comprising:
a fixing portion that includes a fixing member which receives power supply so as to increase in temperature and that fixes an image printed on a sheet to the sheet with the fixing member whose temperature is increased to a predetermined temperature;
a temperature detection portion that receives power supply so as to output a voltage corresponding to a temperature of the fixing portion;
a power supply portion that performs the power supply to the fixing portion and the temperature detection portion in the normal mode and that stops the power supply to the fixing portion and the temperature detection portion in the power saving mode;
a control portion that detects, based on the output of the temperature detection portion, the temperature of the fixing portion so as to perform temperature control on the fixing portion and that returns the image forming apparatus to the normal mode by performing predetermined return processing including fixing return processing in which when the return condition is satisfied, the temperature of the fixing portion is increased to the predetermined temperature;
a photovoltaic module that receives light so as to generate electric power; and
a power storage/supply portion that stores the power output from the photovoltaic module and that performs power supply to the temperature detection portion when the power supply from the power supply portion to the temperature detection portion is stopped,
wherein the control portion detects, when the return condition is satisfied, the temperature of the fixing portion based on the output of the temperature detection portion, and as a temperature on return that is the detected temperature is higher, the control portion starts the fixing return processing at later timing whereas as the temperature on return is lower, the control portion starts the fixing return processing at earlier timing.

### Claim 2 (depends on 1)

The image forming apparatus according to claim 1, further comprising:
a storage portion that stores waiting time information in which a waiting time after the return condition is satisfied until the fixing return processing is started is previously determined and in which the waiting time corresponding to the temperature of the fixing portion is previously determined such that as the temperature of the fixing portion is increased, the waiting time is increased,
wherein the control portion determines, based on the waiting time information, as a target waiting time, the waiting time corresponding to the temperature on return, and starts the fixing return processing with timing at which the target waiting time elapses after the return condition is satisfied.

### Claim 3 (depends on 1)

The image forming apparatus according to claim 1, further comprising:
an operation panel that includes an operation surface which receives an operation from a user; and
a support member that supports the photovoltaic module such that the photovoltaic module is arranged above the operation surface of the operation panel,
wherein the photovoltaic module is supported by the support member so as to be able to be turned with respect to the support member.

### Claim 4 (depends on 3)

The image forming apparatus according to claim 3,
wherein the support member is attached to a main body of the apparatus so as to be turned between a first position and a second position, and
the photovoltaic module is supported by the support member such that
the support member is turned toward the first position such that the photovoltaic module is moved in a direction in which the photovoltaic module approaches the operation surface of the operation panel,
when the support member reaches the first position, the photovoltaic module blocks the operation surface of the operation panel and
the support member is turned from the first position toward the second position such that the photovoltaic module is moved in a direction in which the photovoltaic module is moved away from the operation surface of the operation panel.

### Claim 5 (depends on 4)

The image forming apparatus according to claim 4,
wherein on the operation surface of the operation panel, a display panel which emits display light is arranged, and
the photovoltaic module is a double-sided light receiving type in which both a front surface and a back surface function as light receiving surfaces.

### Claim 6 (depends on 4)

The image forming apparatus according to claim 4, further comprising:
a biasing member that biases the support member such that the support member is turned from the first position toward the second position,
wherein a first engagement portion is provided in the photovoltaic module, and a second engagement portion which can be engaged with the first engagement portion is provided in the operation panel, and
the first engagement portion and the second engagement portion are engaged with each other when the support member is present in the first positon.

### Claim 7 (depends on 3)

The image forming apparatus according to claim 3,
wherein the support member includes a rail member and a slide member which is supported by the rail member so as to be able to slide on the rail member, and
the photovoltaic module is supported by the slide member.

### Claim 8 (depends on 3)

The image forming apparatus according to claim 3,
wherein the support member is formed such that a storage space is acquired therewithin, and an electric wire which is extended from the photovoltaic module is stored in the storage space.