公开(公告)号：US11483436B2

公开(公告)日：2022-10-25

申请号：US17312160

申请日：2020-03-11

申请人： Hewlett-Packard Development Company, L.P.

发明人： Kiho Park ,  Minkeun Song ,  SaeJin Park ,  Yong-Ho You ,  Sungdae Kim

IPC分类号： H04N1/00 ,  H04N1/23

摘要： An image forming apparatus includes a printer engine, a sensor and a processor. The printer engine forms an image. The sensor outputs vibration information associated with a vibration of the printer engine. The processor determines whether at least one component of the printer engine has an abnormality based on the output vibration information.

公开(公告)号：US20220190753A1

公开(公告)日：2022-06-16

申请号：US17311750

申请日：2020-02-05

申请人： Hewlett-Packard Development Company, L.P.

发明人： Yongho You ,  Hyoungil Kim ,  Jiyoung Byun ,  Hakkyum Kim ,  Sungdae Kim

IPC分类号： H02P5/485 ,  B41J29/38 ,  F16H59/40 ,  F16H59/14 ,  F16H63/50 ,  F16H1/22

摘要： An example power delivery device includes a drive shaft to connect with a load, a first motor connected with the drive shaft through a first reducer, and at least one second motor connected with the drive shaft through a second reducer, wherein a first final driven gear of the first reducer is directly connected with the drive shaft, and a second final driven gear of the second reducer is connected with the drive shaft through a one-direction connector.

公开(公告)号：US20220091534A1

公开(公告)日：2022-03-24

申请号：US17417032

申请日：2020-01-07

申请人： Hewlett-Packard Development Company, L.P.

发明人： Hyoungil Kim ,  Jaeil Yu ,  Sungdae Kim ,  Sangbum Woo ,  Ji Young Byun ,  Yong Ho You

IPC分类号： G03G15/043 ,  H04N1/047

摘要： An example operating method of an image forming apparatus includes detecting a position change of a beam with respect to a certain color in a main scanning direction, based on a change in a detection time at which the beam with respect to the certain color is detected by a beam detecting apparatus in the main scanning direction, detecting a position change of the beam with In respect to the certain color in a sub-scanning direction, based on a change in a detection time at which the beam with respect to the certain color is detected by the beam detecting apparatus in the sub-scanning direction, and correcting a value of at least one parameter used for alignment between an image of a reference color and an image of the certain color, based on the position changes of the beam in the main scanning direction and the sub-scanning direction.

公开(公告)号：US11378905B2

公开(公告)日：2022-07-05

申请号：US17281044

申请日：2019-10-11

申请人： Hewlett-Packard Development Company, L.P.

发明人： Yasuhisa Ehara ,  Jaeil Yu ,  Sangbum Woo ,  Sungdae Kim ,  Sooyong Kim ,  Youngwan Cho

IPC分类号： G03G15/00 ,  G03G15/01

摘要： An example image forming apparatus includes a printing engine including a plurality of photosensitive drums, a motor device to provide a driving force to each of the plurality of photosensitive drums, and a processor to control the printing engine such that printing data is printed on a printing paper and control the motor device such that at least one of the plurality of photosensitive drums operates at a different speed from the other photosensitive drums while the printing data is printed.