Patents by Inventor Dong Jin Chang
Dong Jin Chang 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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Publication number: 20240120904Abstract: A semiconductor device includes an on-die resistor circuit comprising an on-die resistor, a calibration circuit configured to perform a calibration operation on the on-die resistor, and a calibration control circuit configured to control the calibration operation of the calibration circuit. The calibration circuit includes a current generating circuit configured to supply a calibration current to the on-die resistor and a comparing circuit configured to compare the magnitude of a first input signal that is generated by the calibration current and the on-die resistor with a magnitude of a second input signal that is generated by the calibration current and an external resistor.Type: ApplicationFiled: February 15, 2023Publication date: April 11, 2024Applicant: SK hynix Inc.Inventors: Dong Seok KIM, Joo Won OH, Keun Jin CHANG
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Patent number: 11955943Abstract: A semiconductor device includes an on-die resistor circuit comprising an on-die resistor, a calibration circuit configured to perform a calibration operation on the on-die resistor, and a calibration control circuit configured to control the calibration operation of the calibration circuit. The calibration circuit includes a current generating circuit configured to supply a calibration current to the on-die resistor and a comparing circuit configured to compare the magnitude of a first input signal that is generated by the calibration current and the on-die resistor with a magnitude of a second input signal that is generated by the calibration current and an external resistor.Type: GrantFiled: February 15, 2023Date of Patent: April 9, 2024Assignee: SK hynix Inc.Inventors: Dong Seok Kim, Joo Won Oh, Keun Jin Chang
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Publication number: 20240103809Abstract: Provided is a computation method of a memory processor configured to perform an operation between a first vector including first elements and a second vector including second elements, the first elements including respective first bits and the second elements including respective second bits, the method performed by the memory processor including: applying, to single-bit operation gates, the respective first bits and the respective second bits; obtaining bit operation result sum values for the respective first and second elements based on bit operation results obtained using the single-bit operation gates; and obtaining an operation result of the first vector and the second vector based on the bit operation result sum value.Type: ApplicationFiled: April 26, 2023Publication date: March 28, 2024Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Dong-Jin CHANG, Soon-Wan KWON, Seok Ju YUN, Jaehyuk LEE, Sungmeen MYUNG, Daekun YOON
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Publication number: 20240094988Abstract: A multi-bit accumulator including a plurality of 1-bit Wallace trees configured to perform an add operation on single-bit input data, a plurality of tristate buffers configured to output a result of the add operation of the 1-bit Wallace trees, according to an enable signal, and a shift-adder configured to perform an accumulation operation on the result of the add operation of the plurality of 1-bit Wallace trees by a shift operation based on a clock signal.Type: ApplicationFiled: March 6, 2023Publication date: March 21, 2024Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Dong-Jin CHANG, Sungmeen MYUNG, Jaehyuk LEE, Daekun YOON, Seok Ju YUN
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Publication number: 20240086153Abstract: A multi-bit accumulator includes 1-bit Wallace trees each configured to perform an add operation on single-bit input data, tristate logic circuits each configured to output a result of the add operation of the 1-bit Wallace trees according to an enable signal provided to the tristate logic circuits, and a shift-adder configured to perform an accumulation operation on the result of the add operation of the 1-bit Wallace trees by a shift operation based on a clock signal.Type: ApplicationFiled: September 14, 2023Publication date: March 14, 2024Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Sungmeen MYUNG, Dong-Jin CHANG, Jaehyuk LEE, Daekun YOON, Seok Ju YUN
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Publication number: 20240069867Abstract: An apparatus and method with in-memory computing (IMC) are provided. An in-memory computing (IMC) circuit includes a plurality of memory banks, each memory bank including a bit cell configured to store a weight value and an operator configured to receive an input value, the operator being connected to the bit cell such that the operator upon receiving the input value outputs a logic operation result between the input value and the weight value, and a logic gate configured to receive the logic operation result of each of the memory banks.Type: ApplicationFiled: July 12, 2023Publication date: February 29, 2024Applicant: Samsung Electronics Co., Ltd.Inventors: Seok Ju YUN, Jaehyuk LEE, Seungchul JUNG, Soon-Wan KWON, Sungmeen MYUNG, Daekun YOON, Dong-Jin CHANG
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Patent number: 11903821Abstract: Provided is an intraocular lens exchanger for moving a foldable intraocular lens (IOL), the intraocular lens exchanger including: an outer tube having a first passage formed in a forward/rearward direction; an inner tube disposed to be movable along the first passage and having a second passage formed in the forward/rearward direction; and a variable tube extending from a front end of the inner tube to form a variable passage connected to the second passage, in which the variable tube has an extension part having a width that increases forward in an unconstrained state in which the variable tube is not positioned in the first passage, and the extension part is provided to be elastically deformed when the unconstrained state changes to a constrained state in which at least a part of the extension part is received in the first passage.Type: GrantFiled: December 19, 2018Date of Patent: February 20, 2024Assignees: THE CATHOLIC UNIVERSITY OF KOREA INDUSTRY-ACADEMIC COOPERATION FOUNDATIONInventors: Hyung Gu Kwon, Dong Jin Chang, Young Jung Roh, Jae Hyung Han
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Publication number: 20240028298Abstract: A memory device performs a multiplication operation using a multiplying cell including a memory cell and a switching element, in which the memory cell includes a pair of inverters connected to each other in opposite directions, a first transistor connected to one end of the pair of inverters, and a second transistor connected to the other end of the pair of inverters, and has a set weight; and the switching element is connected to an output end of the memory cell and configured to perform switching in response to an input value and output a signal corresponding to a multiplication result between the input value and the weight.Type: ApplicationFiled: March 17, 2023Publication date: January 25, 2024Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jaehyuk LEE, Seok Ju YUN, Dong-Jin CHANG, Sungmeen MYUNG, Daekun YOON
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Publication number: 20240009037Abstract: A plaster for fixing a drainage tube is provided, which fixes the drainage tube that is inserted into a patient's body and discharges liquid inside the patient's body to the outside of the patient's body. The plaster includes a plurality of support pads attached to the patient's body to be spaced apart from each other, each of the plurality of support pads having a certain thickness; a support band fixed to respective upper surfaces of the support pads to cover the skin; and a plurality of holders detachably coupled to an upper surface of the support band to hold and fix the drainage tube. The plaster for fixing a drainage tube maintains a stable fixation state by blocking longitudinal movement of the drainage tube as well as lifting of the drainage tube, and protects the skin from a 3-way valve to prevent pain even when the skin is pressed.Type: ApplicationFiled: June 5, 2023Publication date: January 11, 2024Inventors: Ji Youn SIM, Dong Jin CHANG
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Publication number: 20230367551Abstract: An in-memory method and apparatus are included. An in-memory computing (IMC) macro includes an IMC array that includes an IMC configured to share sub-clock signals that are generated based on an external clock signal and control respective columns having a crossbar structure, the IMC is further configured to perform a matrix product operation between weight bits by units of columns thereof and input bits of an input vector, the weight bits being sequentially loaded, according to the sub-clock signals, from a memory cell array comprising memory cell units, and an enabling circuit configured to generate enabling signals for enabling the weight bits included in each of the plurality of columns, for each of the plurality of memory cells.Type: ApplicationFiled: October 24, 2022Publication date: November 16, 2023Applicant: Samsung Electronics Co., Ltd.Inventor: Dong-jin CHANG
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Publication number: 20230284900Abstract: A method of determining pathologic myopia by using the geometric structure of a posterior sclera of a fundus includes obtaining geometric location data about a fovea, an optic disc, and a deepest point of the eye (DPE) in the posterior sclera of the fundus; obtaining an elevation difference TEPSfovea?DPE between the fovea and the DPE, an elevation difference TEPSdisc?DPE between the optic disc and the DPE, and an elevation difference TEPSfovea?disc between the fovea and the optic disc by using location information about the fovea, the optic disc, and the DPE in the posterior sclera; and determining pathologic myopia by using at least two elevation differences selected from among the elevation difference TEPSfovea?DPE between the fovea and the DPE, the elevation difference TEPSdisc?DPE between the optic disc and the DPE, and the elevation difference TEPSfovea?disc between the fovea and the optic disc.Type: ApplicationFiled: June 23, 2021Publication date: September 14, 2023Inventors: Yong Chan KIM, Dong Jin CHANG, So Jin PARK
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Publication number: 20230240893Abstract: Proposed are a laser feedback device for irradiation to an eyeball and a laser feedback method using the same, the laser feedback device comprising: a guide beam irradiation unit for irradiating a guide beam to an eyeball of a patient; a reflection unit positioned adjacent to the guide beam irradiation unit; a laser irradiation unit for irradiating a laser into the eyeball; an image acquisition unit that receives a reflection beam reflected from the eyeball and refracted through the reflection unit and acquires at least one retinal image of the retina of the eyeball; and an image mapping unit that maps at least one retinal image to construct a macular image which is a full image of the macula of the eyeball.Type: ApplicationFiled: January 21, 2021Publication date: August 3, 2023Inventors: Dong Jin CHANG, Young Jung ROH
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Publication number: 20220378979Abstract: A multilayer cornea harvesting apparatus capable of obtaining layers of cornea from one cornea enucleation object and a cornea harvesting method is disclosed. The apparatus includes a base supported on a bottom surface, a mount detachably coupled to the base, allowing a cornea enucleation object to be placed thereon, having a first opening part formed at a portion corresponding to the cornea of the cornea enucleation object, and having a first medicinal fluid charging space formed between the base and the mount, a stabilizer fixing, to the mount, a sclera portion of the cornea enucleation object placed on the mount and having a second opening part formed at a portion corresponding to the cornea, and an upper cover detachably provided on the upper side of the cornea, supported by the mount or supporting the mount, and forming a second medicinal fluid charging space on the upper side of the cornea.Type: ApplicationFiled: August 7, 2020Publication date: December 1, 2022Applicant: THE CATHOLIC UNIVERSITY OF KOREA INDUSTRY-ACADEMIC COOPERATION FOUNDATIONInventors: Dong Jin CHANG, Hosik HWANG
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Publication number: 20220233069Abstract: An apparatus for assisting an eyelid examination according to an embodiment of the present disclosure assists eversion of an eyelid in order to observe conjunctiva or meibomian glands of the eyelid. The apparatus may include a clamping part configured to hold eyelid or eyelashes around the eyelid, a pressing part having one side connected to the clamping part and the other side in contact with an upper boundary portion of an upper eyelid plate formed along an eyeball line of the eyelid, and a handle part having one side connected to the clamping part and the other side extending while having an angle with the clamping part so that a force for the eyelid eversion is applied to the clamping part at a location spaced apart from the eyelid.Type: ApplicationFiled: June 9, 2020Publication date: July 28, 2022Inventors: Dong Jin CHANG, Kyung Sun NA
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Publication number: 20220031450Abstract: Provided is an intraocular lens exchanger for moving a foldable intraocular lens (IOL), the intraocular lens exchanger including: an outer tube having a first passage formed in a forward/rearward direction; an inner tube disposed to be movable along the first passage and having a second passage formed in the forward/rearward direction; and a variable tube extending from a front end of the inner tube to form a variable passage connected to the second passage, in which the variable tube has an extension part having a width that increases forward in an unconstrained state in which the variable tube is not positioned in the first passage, and the extension part is provided to be elastically deformed when the unconstrained state changes to a constrained state in which at least a part of the extension part is received in the first passage.Type: ApplicationFiled: December 19, 2018Publication date: February 3, 2022Inventors: Hyung Gu KWON, Dong Jin CHANG, Young Jung ROH, Jae Hyung HAN
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Patent number: 10004637Abstract: The present invention relates to an anterior capsulotomy guide device for cataract surgery. The present invention relates to an anterior capsulotomy guide device for cataract surgery which is temporarily inserted for anterior capsulotomy during cataract surgery, wherein the anterior capsulotomy guide device comprises a ring-shaped body, and a cut portion is formed by cutting a part of the body. According to the present invention, it is possible to carry out anterior capsulotomy with precise size and shape during cataract surgery, thereby maximizing the effect of cataract surgery.Type: GrantFiled: October 18, 2013Date of Patent: June 26, 2018Assignees: Catholic University Industry Academic Cooperation Foundation, Lucid Korea Co., Ltd.Inventors: Choun-Ki Joo, Dong Jin Chang, Chong Houn Lee, Dong Kun Lee
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Patent number: 9704418Abstract: The present invention relates to an ocular surgery training device, which includes an eye model having a hole at one side, and a catheter inserted into the hole, wherein a pressure sensor for measuring a pressure applied to the hole by the catheter is provided at one end of the catheter. The present invention may provide the ocular surgery training device which may enhance the skill of users in performing ocular surgery, thereby preventing complications.Type: GrantFiled: March 25, 2015Date of Patent: July 11, 2017Assignee: The Catholic University of Korea Industry-Academic Cooperation FoundationInventors: Dong Jin Chang, Choun-ki Joo
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Patent number: 9610132Abstract: The present invention relates to a surgical instrument for cataract surgery, and provides the surgical instrument for assisting in distinguishing the anterior capsule during cataract surgery, including a ring-shaped body; and a light source provided on a bottom surface portion of the body.Type: GrantFiled: July 25, 2014Date of Patent: April 4, 2017Assignee: The Catholic University of Korea Industry-Academic Cooperation FoundationInventors: Choun-Ki Joo, Dong Jin Chang
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Publication number: 20160157952Abstract: The present invention relates to a surgical instrument for cataract surgery, and provides the surgical instrument for assisting in distinguishing the anterior capsule during cataract surgery, including a ring-shaped body; and a light source provided on a bottom surface portion of the body.Type: ApplicationFiled: July 25, 2014Publication date: June 9, 2016Inventors: Choun-Ki JOO, Dong Jin CHANG
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Publication number: 20150305934Abstract: The present invention relates to an anterior capsulotomy guide device for cataract surgery. The present invention relates to an anterior capsulotomy guide device for cataract surgery which is temporarily inserted for anterior capsulotomy during cataract surgery, wherein the anterior capsulotomy guide device comprises a ring-shaped body, and a cut portion is formed by cutting a part of the body. According to the present invention, it is possible to carry out anterior capsulotomy with precise size and shape during cataract surgery, thereby maximizing the effect of cataract surgery.Type: ApplicationFiled: October 18, 2013Publication date: October 29, 2015Inventors: Choun-Ki Joo, Dong Jin Chang, Chong Houn Lee, Dong Kun Lee