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公开(公告)号：USRE50141E1
公开(公告)日：2024-09-24
申请号：US17168029
申请日：2021-02-04
发明人： Takashi Kawana , Kazuyuki Ishihara , Yuuji Takayama , Hikaru Uchidate , Yoshihiko Tanaka , Hiroyuki Fukuhara , Shuichi Kurokawa
IPC分类号： G03G15/043 , H04N1/028 , H04N1/04 , H04N1/053 , H04N1/113
CPC分类号： G03G15/043 , H04N1/02885 , H04N1/04 , H04N1/053 , H04N1/1135
摘要： An image-forming apparatus includes a light-irradiation unit configured to move a spot of laser light on a surface of a photosensitive member at a non-constant scanning velocity in a main scanning direction to form a latent image on the photosensitive member, an image data correcting unit configured to correct a length in the main scanning direction of image data by inserting one or more image data pieces into the image data, the number of the image data pieces increasing as the scanning velocity increases, and/or extracting one or more image data pieces from the image data, the number of the image data pieces increasing as the scanning velocity decreases, and a brightness correcting unit configured to correct a brightness of the laser light so that an emission brightness increases as the scanning velocity increases and/or the emission brightness decreases as the scanning velocity decreases.
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公开(公告)号：US11212413B2
公开(公告)日：2021-12-28
申请号：US16707220
申请日：2019-12-09
发明人： Zuliao Qin , Gang Wang , Xuan Tan
IPC分类号： H04N1/113 , G03G15/04 , G02B26/12 , G03G15/043 , G02B27/00
摘要： A laser scanning unit (LSU) identification method and an image forming device are provided. The image forming device includes a processor and a target LSU, where the target LSU includes a laser diode, a laser diode drive unit, a polygon mirror, and a motor. The method includes providing a signal related to a quantity of reflective surfaces of the polygon mirror to the processor by the target LSU; identifying the quantity of the reflective surfaces of the polygon mirror of the target LSU according to the signal related to the quantity of the reflective surfaces of the polygon mirror provided by the target LSU, and determining a control parameter of the target LSU according to an identified quantity of the reflective surfaces by the processor, thereby controlling the target LSU according to the control parameter; and operating according to the control parameter by the target LSU.
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公开(公告)号：US10962769B2
公开(公告)日：2021-03-30
申请号：US15543052
申请日：2016-01-11
发明人： Seung Taek Kim , Moon Soo Park , Jong Seok Kim , Hyung Tae Kim
IPC分类号： G02B26/12 , B33Y30/00 , B29C67/00 , B29C64/264 , G01B5/00 , G01B11/00 , G01B11/25 , G02B26/10 , G06K9/32 , H04N1/113
摘要： The present invention relates to a head device of a three-dimensional modelling equipment, and a modelling plane scanning method using the same, the head device of a three-dimensional modelling equipment comprising: a modelling light source array having a plurality of modelling light sources; a light guide part, installed at a given position above a modelling plane, having a function of reflecting modelling rays from the modelling light source array so as to be incident on the modelling plane; and a controller for controlling the operations of the modelling light source array and the light guide part in a conjoined manner, wherein a plurality of modelling rays generated from the plurality of modelling light sources are irradiated while forming one line scan having a first axial direction on the modelling plane, and the light guide part continuously or intermittently moves the one line scan on the modelling plane to irradiate the modelling light rays across the modelling plane. The present invention has the effects of enabling high-speed scanning to be performed, and modelling precision to be enhanced through precise scanning control.
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公开(公告)号：US20200225601A1
公开(公告)日：2020-07-16
申请号：US16832487
申请日：2020-03-27
发明人： Kazumi Sato
摘要： An image controller of an image forming apparatus is configured to generate a light emission signal for detection for forming light emission for detection, and transmit the light emission signal for detection to a laser controller through a flexible flat cable, and the laser controller is configured to cause a semiconductor laser to emit light in accordance with the light emission signal for detection, and determine, based on a PD signal output from a PD that has received a light beam, whether improper connection has occurred in the flexible flat cable.
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公开(公告)号：US10682865B2
公开(公告)日：2020-06-16
申请号：US16078797
申请日：2017-01-24
发明人： Issei Nakano
摘要： A first receiving recess (44d) and a second receiving recess (44e) are formed on a surface of the housing, on which a pair of image forming lenses (47) are placed, to receive a first temperature sensor (101a) and a second temperature sensor (101b), and are formed in positions, in which thermal deformation characteristics of the housing are approximately identical at one side and the other side of a first straight line K1, while interposing the first straight line K1 therebetween.
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公开(公告)号：US10578992B2
公开(公告)日：2020-03-03
申请号：US15842490
申请日：2017-12-14
发明人： Naoki Oyama
摘要： An image forming apparatus, including: an image signal generating portion configured to generate an image signal based on image data; a light source configured to emit a light beam based on the image signal; and a deflection device configured to deflect the light beam in a main scanning direction, wherein the image signal generating portion includes: a mode setting portion configured to set a plurality of modes including a mode in which a value of a pixel of the image data is not converted and a mode in which the value of the pixel in one or more lines is converted, to a plurality of areas into which a scanning area is divided in the main scanning direction, respectively; and a pixel value conversion portion configured to convert the value of the pixel in each mode in accordance with a position of the pixel in the main scanning direction.
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公开(公告)号：US10576753B2
公开(公告)日：2020-03-03
申请号：US16162951
申请日：2018-10-17
申请人： Konica Minolta Inc.
发明人： Tatsutoshi Yamada
摘要： An image forming apparatus includes: a light source that emits a laser beam; a polygon mirror that reflects the laser beam; a photoreceptor that is to be exposed to the laser beam reflected by the polygon mirror; a motor that rotates the polygon mirror; and a hardware processor capable of detecting sheet type, that is, type of a sheet conveyed in the image forming apparatus, wherein the hardware processor controls to rotate the motor at a first rotation speed until the sheet type is detected, and rotate the motor at a second rotation speed determined on the basis of the sheet type after detection of the sheet type.
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公开(公告)号：US10538109B2
公开(公告)日：2020-01-21
申请号：US16073414
申请日：2017-01-25
发明人： Issei Nakano
摘要： A scanning path of light includes a synchronization detection area A where a synchronization detection sensor 47 detects scanning light and an image writing area B where writing of the image data to a photosensitive drum 11 is performed by the scanning light, and a light amount change unit 100 is configured to reduce a change amount of a light amount in the synchronization detection area A as compared with the image writing area B.
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公开(公告)号：US10484566B2
公开(公告)日：2019-11-19
申请号：US15891087
申请日：2018-02-07
发明人： Hisashi Namba , Masahiro Ogura , Yosuke Murakami , Ken Katsuta , Yuta Okada
摘要： A light scanning apparatus including: a rotary polygon mirror configured to deflect a laser beam emitted from a light source; optical elements configured to guide the laser beam to a photosensitive member; a housing having a bottom surface and a side wall portion standing from the bottom surface and intersecting with a longitudinal direction of the optical elements; and a plurality of wall portions provided on the bottom surface so as to intersect with the longitudinal direction between the bottom surface and a lens of the optical elements that is closest to the rotary polygon mirror, the plurality of wall portions forming an air flow path for guiding an air flow caused by rotation of the rotary polygon mirror from a first space in which the rotary polygon mirror is arranged to a second space opposite to the first space with respect to the lens.
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公开(公告)号：US10462862B2
公开(公告)日：2019-10-29
申请号：US15997858
申请日：2018-06-05
申请人： Hayato Fujita
发明人： Hayato Fujita
IPC分类号： H05B33/08 , G03G15/043 , H04N1/113 , G03G15/00 , G03G15/01
摘要： A light source control device, includes circuitry to: apply a threshold current, a first emission current, and a first correction current to a light source to drive the light source to emit light to form a first pixel, and apply the threshold current, a second emission current, and a second correction current to the light source to drive the light source to emit light to form a second pixel, wherein the circuitry calculates a value of the second correction current by multiplying a value of the first correction current by a ratio of a value of the second emission current to a value of the first emission current, the value of the second emission current being greater than the value of the first emission current.
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