JP-2026074594-A - Control method for image processing device, image processing device

JP2026074594AJP 2026074594 AJP2026074594 AJP 2026074594AJP-2026074594-A

Abstract

[Problem] When a lower-level device is connected to a USB host controller via a USB hub, each device must be reliably started up in response to a wake-up event occurring in the lower-level device. [Solution] When the image processing device 10 is operating in normal mode, the control device 5 outputs a command to set a remote wake-up function to a lower-level device 8 connected to the USB host controller 7 via one or more USB hubs. When the suspend condition is met, the control device 5 outputs a global suspend command to the USB host controller 7 and further transitions the image processing device 10 from normal mode to suspend mode. When the suspended USB host controller 7 receives a remote wake-up notification from the lower-level device 8 which was started in response to a wake-up event, the control device 5 transitions the image processing device 10 back to normal mode. [Selection Diagram] Figure 1

Inventors

松本仁志

Assignees

京セラドキュメントソリューションズ株式会社

Dates

Publication Date: 20260507
Application Date: 20241021

Claims (2)

A control method for an image processing apparatus equipped with a USB host controller, When the image processing device is operating in normal mode, the control device executes a process to output a command to set the remote wake-up function to a subordinate device connected to the USB host controller via one or more USB hubs. The control device, when predetermined suspend conditions are met, outputs a global suspend command to the USB host controller, and further transitions the image processing device from the normal mode to a suspend mode that consumes less power than the normal mode. The control device, when predetermined suspend conditions are met, outputs a global suspend command to the USB hub and suspends the USB host controller, and further switches the image processing device from the normal mode to a suspend mode that consumes less power than the normal mode. A method for controlling an image processing device, comprising: when the suspended USB host controller is started up after receiving a remote wake-up notification from the subordinate device which was started up in response to a wake-up event, the control device transitions the image processing device from the hibernation mode to the normal mode.
An image processing unit that performs image processing, USB host controller and An image processing apparatus comprising a control device that implements the control method for the image processing apparatus described in claim 1.

Description

This invention relates to a control method and an image processing apparatus equipped with a USB host controller. Image processing devices such as image forming apparatuses, image reading apparatuses, or multifunction printers are equipped with a function to switch from normal mode to sleep mode when sleep conditions are met. The aforementioned sleep mode is an operating mode that consumes less power than the aforementioned normal mode. For example, the sleep condition is that the waiting time during which no operations or processing requests are received exceeds a predetermined period. The image processing device may be equipped with a USB interface. The image processing device can exchange data with external devices, such as storage devices, connected directly to the USB interface or via a USB hub. Furthermore, it is known that the image processing device transitions from the normal mode to the hibernation mode when it does not receive a status response request from the host device connected to the USB interface (see, for example, Patent Document 1). In this case, the USB interface is a USB device controller, and the host device includes a USB host controller. Japanese Patent Publication No. 2015-222505 Figure 1 is a block diagram showing the configuration of an image processing apparatus according to an embodiment.Figure 2 is a flowchart of the pause process in the image processing apparatus according to the embodiment.Figure 3 is a flowchart of the normal recovery process in the image processing apparatus according to the embodiment.Figure 4 is a flowchart of an unusual recovery process in an image processing apparatus according to the embodiment.Figure 5 is a flowchart of the pause process in a host device according to a reference example.Figure 6 is a flowchart of the normal recovery process in a host device according to a reference example.Figure 7 is a flowchart illustrating an example of a failed recovery process in a host device related to a reference example. The embodiments of the present invention will be described below with reference to the drawings. Note that the following embodiments are merely examples of the present invention and do not limit the technical scope of the invention. [Configuration of the image processing device 10] The image processing apparatus 10 according to this embodiment is capable of performing various image processing operations, such as image forming, image reading, and image transmission. For example, the image processing apparatus 10 is a printer, copier, facsimile machine, or multifunction device. In the example shown in Figure 1, the image processing device 10 comprises an image forming unit 1, an image reading unit 2, a user interface device 3, a communication device 4, a control device 5, and a secondary storage device 6. Furthermore, the image processing device 10 includes a USB host controller 7, which is the host-side USB interface. Note that USB is a registered trademark. The image processing device 10 can communicate with other devices, such as information processing terminals, via a network. This network includes LANs (Local Area Networks) and the Internet. The image forming unit 1 performs the image forming process using a predetermined method, such as electrophotography or inkjet technology. The image forming process involves forming an image on the sheet 91. The image forming unit 1 includes a sheet transport mechanism for transporting the sheet 91 and a printing device for forming an image on the sheet 91. The image reading unit 2 executes the image reading process. This image reading process involves reading the image on the document 92. The image reading unit 2 includes an optical scanning mechanism that scans the document 92 with light, and an image sensor that receives the reflected light reflected from the document 92. The image sensor outputs data of the scanned image. The scanned image is an image read from the original document 92. The user interface device 3 includes an operating device 3a and a display device 3b. The operating device 3a is a device that accepts human input. For example, the operating device 3a includes operation buttons and a touch panel. The display device 3b is capable of displaying information. For example, the display device 3b includes a display panel such as a liquid crystal panel. The communication device 4 is a communication interface device that communicates with other devices, such as the information processing terminal, via the network. The control device 5 performs all data transmission and reception with the other devices through the communication device 4. The image forming unit 1 performs the image forming process based on the data of the read image or the received print data. The received print data is the data included in the print request received from the information processing terminal via the communication device 4. Furthermore, the communication device 4 is capable of performing the image transmission