公开(公告)号：US10019584B2

公开(公告)日：2018-07-10

申请号：US15066691

申请日：2016-03-10

Applicant: S-PRINTING SOLUTION CO., LTD.

Inventor： Wook-Jin Shim ,  Youn-jae Kim

IPC: G06F21/00 ,  G06F21/60 ,  G06F12/14 ,  G06F21/55 ,  G06F21/62 ,  G06F21/71

CPC classification number: G06F21/602 ,  G06F12/1408 ,  G06F21/556 ,  G06F21/6245 ,  G06F21/71 ,  G06F2212/1052

Abstract: An image forming apparatus includes a function unit configured to perform a predetermined function, a volatile memory configured to store data which is necessary for performing the function of the function unit, and a controller configured to control the function unit using the encrypted data stored in the volatile memory, and to encrypt data to be stored in the volatile memory and write the data on a predetermined area of the volatile memory.

公开(公告)号：US10095182B2

公开(公告)日：2018-10-09

申请号：US15485979

申请日：2017-04-12

Applicant: S-PRINTING SOLUTION CO., LTD.

Inventor： Youn-jae Kim

IPC: G03G15/00 ,  G03G21/18 ,  G06F1/08 ,  G06F1/26

Abstract: A CRUM unit which is mountable/dismountable on an image forming apparatus is disclosed. The CRUM unit includes a power extracting circuit to, when a clock signal is received from an image forming apparatus, extract power from a high value of the clock signal and store in a capacitive element and a controller to operate using the extracted power, wherein the clock signal has a first pulse width in a data section where a data signal is received and transmitted, and has a second pulse width which is different from the first pulse width in an pause section where a data signal is not received.