Patents by Inventor Sang Bum WOO
Sang Bum WOO has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 12042030Abstract: A smart cane may include: a main body configured to have an adjustable length; an inertia sensor unit configured to generate an angle value between a ground surface and the smart cane or detect an impact on the main body; and a controller configured to adjust the length of the main body according to at least one of the angle value and a number of impacts on the main body.Type: GrantFiled: April 22, 2021Date of Patent: July 23, 2024Assignee: HUJECTInventors: Tae-Hyun Sung, Sang Bum Woo, Kyung Bum Kim, Quan Wang, Moses Sung
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Publication number: 20210336481Abstract: A smart cane may include: a main body configured to have an adjustable length; an inertia sensor unit configured to generate an angle value between a ground surface and the smart cane or detect an impact on the main body; and a controller configured to adjust the length of the main body according to at least one of the angle value and a number of impacts on the main body.Type: ApplicationFiled: April 22, 2021Publication date: October 28, 2021Inventors: Tae-Hyun SUNG, Sang Bum WOO, Kyung Bum KIM, Quan WANG, Moses SUNG
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Patent number: 9791818Abstract: An image forming apparatus and a method of reducing image banding of the image forming apparatus is provided. The image forming apparatus includes: a photoconductor unit on which an electrostatic latent image is formed; and a conveying unit configured to convey printing medium at a first conveying velocity toward the photoconductor unit, and configured to convey the printing medium at a second conveying velocity that is lower than the first conveying velocity when the printing medium approaches the photoconductor unit.Type: GrantFiled: September 3, 2014Date of Patent: October 17, 2017Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Soo Yong Kim, Sang Bum Woo, Chang Yong Sung, Jae Il Yu
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Publication number: 20170031263Abstract: An image forming apparatus includes a detection unit configured to detect a linear velocity change of a photosensitive drum, which occurs when the photosensitive drum rotates, and an exposure controller configured to control an exposure timing of the exposure unit based on the linear velocity change of the photosensitive drum, which is detected by the detection unit.Type: ApplicationFiled: May 3, 2016Publication date: February 2, 2017Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Sang-bum WOO, Sung-dae KIM, Tae-hee KIM
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Patent number: 9541883Abstract: An image forming apparatus may include first, second, third, and fourth photosensitive media; a first driving source to rotate the first photosensitive medium; a second driving source to rotate the second photosensitive medium; and a planetary gear train to receive rotational forces of the first and second driving sources so as to rotate the third photosensitive medium, wherein the fourth photosensitive medium is rotated by being linked with the third photosensitive medium.Type: GrantFiled: December 2, 2014Date of Patent: January 10, 2017Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Dong-guk Sim, Sang-bum Woo
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Patent number: 9377743Abstract: A power transmitting device having a structure to allow a photoconductor to stably form a visible image on a printing medium. The power transmitting device interconnects a rotator and a drive motor, the drive motor generating drive power to drive the rotator. The power transmitting device includes at least one gear to be rotated upon receiving power from the drive motor, a rotating shaft having one end penetrating the gear and a coupler to interconnect the other end of the rotating shaft and the rotator. An outer diameter of the coupler, an outer diameter of the rotator and an outer diameter of the gear satisfy the following relation: 0.7D1<Dc<D2, where, D1: outer diameter of the rotator, D2: outer diameter of the gear and Dc: outer diameter of the coupler.Type: GrantFiled: October 29, 2014Date of Patent: June 28, 2016Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Sang Bum Woo, Soo Yong Kim, Chang Yong Sung, Jae Il Yu
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Patent number: 9291951Abstract: Disclosed herein is an image forming apparatus that has a developing unit, an intermediate transfer body, and a transfer roller and may prevent contamination of the transfer roller and a printing medium by the toner remaining in a test pattern forming area of the intermediate transfer body. The image forming apparatus includes a developing unit to allow an image to be formed by a developing agent, an intermediate transfer body provided with an image forming area and a test pattern forming area, the image being transferred from the developing unit to the image forming area and the test pattern forming area, and a transfer roller allowing the image to be transferred from the image forming area to a printing medium, wherein a maximum transfer length of the transfer roller is less than a maximum image forming length of the developing unit.Type: GrantFiled: May 19, 2014Date of Patent: March 22, 2016Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Sang Bum Woo, Sung Dae Kim, Soo Yong Kim
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Patent number: 9256182Abstract: An image forming apparatus, a color registration test pattern of the image forming apparatus, and a method of forming the color registration test pattern are provided. A time required for color registration may be reduced by minimizing a region in which a color registration test pattern is formed on an intermediate transfer body. A control method of the image forming apparatus, which includes photosensitive media arranged side by side to correspond to colors in a rotation direction of the intermediate transfer body, includes forming first patterns of the colors arranged in a single row in a sub-scanning direction in a first region of the intermediate transfer body over a single-rotation period of the photosensitive media, and forming second patterns of the colors arranged in a single row in the sub-scanning direction in a second region of the intermediate transfer body over another single-rotation period of the photosensitive media.Type: GrantFiled: November 5, 2014Date of Patent: February 9, 2016Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Hyun Ki Cho, Sang Bum Woo, Jae Il Yu, Soo Yong Kim
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Publication number: 20160004204Abstract: Provided herein is an image forming apparatus and method, the apparatus including an engine configured to form a predetermined pattern having a predetermined multiple number length on a circumference length of each photosensitive drum in an image forming medium using the photosensitive drum, a motor configured to drive the photosensitive drum, and a motor controller configured to sense a cyclic velocity of the photosensitive drum using the formed predetermined pattern, and to control a phase and velocity of the motor using the sensed cyclic velocity.Type: ApplicationFiled: June 9, 2015Publication date: January 7, 2016Applicant: Samsung Electronics Co., Ltd.Inventors: Sang-bum Woo, Dong-guk Sim, Sung-dae Kim
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Publication number: 20150362883Abstract: An image forming apparatus may include first, second, third, and fourth photosensitive media; a first driving source to rotate the first photosensitive medium; a second driving source to rotate the second photosensitive medium; and a planetary gear train to receive rotational forces of the first and second driving sources so as to rotate the third photosensitive medium, wherein the fourth photosensitive medium is rotated by being linked with the third photosensitive medium.Type: ApplicationFiled: December 2, 2014Publication date: December 17, 2015Applicant: Samsung Electronics Co., Ltd.Inventors: Dong-guk SIM, Sang-bum Woo
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Patent number: 9207611Abstract: An image forming apparatus and method which reduces time taken for color registration and reflects misregistration of colors in real time to correct color misregistration of prints are provided.Type: GrantFiled: January 28, 2014Date of Patent: December 8, 2015Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Sang Bum Woo, Sung Dae Kim, Soo Yong Kim
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Patent number: 9110398Abstract: A multi pass type color image forming apparatus and control method are provided. The apparatus advances an exposure time point of forming electrostatic latent images of second and subsequent colors more than that of a first color of a page during consecutive printing or reduces the velocity of a motor to rotate an intermediate transfer belt to minimize a color registration error between a developing agent image of the first color and developing agent images of the subsequent colors of the page caused by cleaning of the intermediate transfer belt and a control method thereof.Type: GrantFiled: December 13, 2012Date of Patent: August 18, 2015Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventor: Sang Bum Woo
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Patent number: 9110394Abstract: An image forming apparatus, which achieves reduced color registration time and real-time calibration of color position shift, and a control method for the same, is provided.Type: GrantFiled: January 23, 2014Date of Patent: August 18, 2015Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Soo Yong Kim, Sang Bum Woo, Sung Dae Kim
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Publication number: 20150125182Abstract: A power transmitting device having a structure to allow a photoconductor to stably form a visible image on a printing medium. The power transmitting device interconnects a rotator and a drive motor, the drive motor generating drive power to drive the rotator. The power transmitting device includes at least one gear to be rotated upon receiving power from the drive motor, a rotating shaft having one end penetrating the gear and a coupler to interconnect the other end of the rotating shaft and the rotator. An outer diameter of the coupler, an outer diameter of the rotator and an outer diameter of the gear satisfy the following relation: 0.7D1<Dc<D2, where, D1: outer diameter of the rotator, D2: outer diameter of the gear and Dc: outer diameter of the coupler.Type: ApplicationFiled: October 29, 2014Publication date: May 7, 2015Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Sang Bum WOO, Soo Yong Kim, Chang Yong Sung, Jae Il Yu
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Publication number: 20150125188Abstract: An image forming apparatus, a color registration test pattern of the image forming apparatus, and a method of forming the color registration test pattern are provided. A time required for color registration may be reduced by minimizing a region in which a color registration test pattern is formed on an intermediate transfer body. A control method of the image forming apparatus, which includes photosensitive media arranged side by side to correspond to colors in a rotation direction of the intermediate transfer body, includes forming first patterns of the colors arranged in a single row in a sub-scanning direction in a first region of the intermediate transfer body over a single-rotation period of the photosensitive media, and forming second patterns of the colors arranged in a single row in the sub-scanning direction in a second region of the intermediate transfer body over another single-rotation period of the photosensitive media.Type: ApplicationFiled: November 5, 2014Publication date: May 7, 2015Applicant: Samsung Electronics Co., Ltd.Inventors: Hyun Ki CHO, Sang Bum WOO, Jae Il YU, Soo Yong KIM
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Publication number: 20150110536Abstract: An image forming apparatus and a method of reducing image banding of the image forming apparatus is provided. The image forming apparatus includes: a photoconductor unit on which an electrostatic latent image is formed; and a conveying unit configured to convey printing medium at a first conveying velocity toward the photoconductor unit, and configured to convey the printing medium at a second conveying velocity that is lower than the first conveying velocity when the printing medium approaches the photoconductor unit.Type: ApplicationFiled: September 3, 2014Publication date: April 23, 2015Applicant: Samsung Electronics Co., Ltd.Inventors: Soo Yong KIM, Sang Bum Woo, Chang Yong Sung, Jae II Yu
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Publication number: 20150023702Abstract: An image forming apparatus includes a registration unit which performs color registration correction by using a registration sensor, an image forming unit which forms a preset first mark whose range is greater than a range recognizable by the registration sensor on an image forming medium, and a storage which stores a specific area of an image forming medium recognizable by the registration sensor by using the formed preset first mark. The image forming apparatus further includes a controller which controls the image forming apparatus to form a preset second mark to perform color registration correction within a range recognizable by the registration sensor by using information regarding the specific area which was previously stored in the storage, and the controller controls the registration unit to perform color registration correction by using the formed preset second mark.Type: ApplicationFiled: December 18, 2013Publication date: January 22, 2015Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Hyun-ki CHO, Sang-bum WOO, Soo-yong KIM, Young-jae PARK, Jae-il YU
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Publication number: 20140348531Abstract: Disclosed herein is an image forming apparatus that has a developing unit, an intermediate transfer body, and a transfer roller and may prevent contamination of the transfer roller and a printing medium by the toner remaining in a test pattern forming area of the intermediate transfer body. The image forming apparatus includes a developing unit to allow an image to be formed by a developing agent, an intermediate transfer body provided with an image forming area and a test pattern forming area, the image being transferred from the developing unit to the image forming area and the test pattern forming area, and a transfer roller allowing the image to be transferred from the image forming area to a printing medium, wherein a maximum transfer length of the transfer roller is less than a maximum image forming length of the developing unit.Type: ApplicationFiled: May 19, 2014Publication date: November 27, 2014Applicant: Samsung Electronics Co., Ltd.Inventors: Sang Bum WOO, Sung Dae KIM, Soo Yong KIM
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Publication number: 20140301758Abstract: An image forming apparatus, which achieves reduced color registration time and real-time calibration of color position shift, and a control method for the same, is provided.Type: ApplicationFiled: January 23, 2014Publication date: October 9, 2014Applicant: Samsung Electronics Co., Ltd.Inventors: Soo Yong KIM, Sang Bum Woo, Sung Dae Kim
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Publication number: 20140212186Abstract: An image forming apparatus and method which reduces time taken for color registration and reflects misregistration of colors in real time to correct color misregistration of prints are provided.Type: ApplicationFiled: January 28, 2014Publication date: July 31, 2014Applicant: Samsung Electronics Co., Ltd.Inventors: Sang Bum Woo, Sung Dae Kim, Soo Yong Kim