Patents by Inventor Byung-Kwon Kang
Byung-Kwon Kang 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: 8315512Abstract: Disclosed is a method for auto-focus control of a digital camera, the method including moving a focus lens of the digital camera to a position for a longest-distance photographing, and then extracting an edge value according to a corresponding position while moving the focus lens by a preset interval in a direction toward an image sensor; estimating a form of a preset function based on the extracted edge values, and calculating a maximum value of the estimated function; calculating a difference between a maximum value of the preset function calculated at a first current position of the focus lens and a maximum value of the preset function calculated at a previous position of the focus lens; and moving the focus lens to a position corresponding to a currently-calculated maximum value of the preset function when the difference between the maximum value of the preset function calculated at the first current position of the focus lens and the maximum value of the preset function calculated at the previous positioType: GrantFiled: January 11, 2011Date of Patent: November 20, 2012Assignee: Samsung Electronics Co., LtdInventors: Woon-Tahk Sung, Byung-Kwon Kang, Jae-Sik Sohn
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Patent number: 8289320Abstract: A three-dimensional (3D) graphic rendering apparatus is provided. The 3D graphic rendering apparatus includes an object-information extraction module which extracts a bound box of each of a plurality of objects, including an i-th object and a j-th object, wherein i and j are natural numbers; an object alignment module which aligns the i-th object and the j-th object according to distances of the i-th and j-th objects, based on the extracted bound boxes of the i-th and j-th objects, from a visual point; and a rendering module which sequentially renders the aligned i-th and j-th objects such that an object among the i-th and j-th objects distant from the visual point can be rendered earlier than an object among the i-th and j-th objects less distant from the visual point.Type: GrantFiled: October 17, 2008Date of Patent: October 16, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Byung-Kwon Kang, Sung-Hee Cho
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Patent number: 8207999Abstract: A method and apparatus for video telephony in a mobile terminal includes: extracting, after establishment of a video call, a facial feature from a video image captured by a camera unit of the mobile terminal, comparing the extracted facial feature with that of a pre-stored reference image, and correcting the video image according to the facial feature of the reference image. The corrected video image is transmitted to a counterpart of the video call.Type: GrantFiled: December 2, 2008Date of Patent: June 26, 2012Inventors: Hae Sun Lee, Byung Kwon Kang, Young Kwon Yoon, Yong Gu Lee, Myoung Won Kim
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Patent number: 8009971Abstract: A hand-shake correction apparatus and method for a camera module for typical use in a mobile device. A camera unit includes an angular velocity sensor for sensing an angular velocity of a hand-shake motion of a camera, a position detection sensor for detecting a current position of an image sensor, and an actuator for actuating the image sensor. An Optical Image Stabilizer (OIS) circuit unit controls the actuator using a multi-rate Proportional Integrate Derivative (PID) control scheme that performs control a plurality of times using a shorter control period compared with existing PID controls for a basic period, in which a reference value is updated according to a control reference value by which the image sensor optimally shifts to correct a hand-shake motion.Type: GrantFiled: December 18, 2007Date of Patent: August 30, 2011Assignees: Samsung Electronics Co., Ltd., Seoul National University Industry FoundationInventors: Jun-Mo Koo, Jin-Young Choi, Byung-Kwon Kang, Dong-Hoon Jang, Pyo-Jae Kim, Dong-Sung Song, Hyung-Jin Chang
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Publication number: 20110170846Abstract: Disclosed is a method for auto-focus control of a digital camera, the method including moving a focus lens of the digital camera to a position for a longest-distance photographing, and then extracting an edge value according to a corresponding position while moving the focus lens by a preset interval in a direction toward an image sensor; estimating a form of a preset function based on the extracted edge values, and calculating a maximum value of the estimated function; calculating a difference between a maximum value of the preset function calculated at a first current position of the focus lens and a maximum value of the preset function calculated at a previous position of the focus lens; and moving the focus lens to a position corresponding to a currently-calculated maximum value of the preset function when the difference between the maximum value of the preset function calculated at the first current position of the focus lens and the maximum value of the preset function calculated at the previous positioType: ApplicationFiled: January 11, 2011Publication date: July 14, 2011Applicant: Samsung Electronics Co., Ltd.Inventors: Woon-Tahk SUNG, Byung-Kwon Kang, Jae-Sik Sohn
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Patent number: 7979143Abstract: A PID controlling apparatus and method for providing a control value to a control object according to the difference between an output value of the control object and a target value are provided, in which an error calculator outputs an error value between the target value and the output value of the control object, a PID operator calculates a proportional value, an integral value, and a derivative value of the error value, calculates the control value using the proportional value, the integral value, and the derivative value, and outputs the control value to the control object, a first sampler samples the output value of the control object a plurality of times with respect to the target value and outputs a sampled output value, and a controller controls the PID operator to repeat a PID operation and output the control value according to a sampling period of the first sampler.Type: GrantFiled: December 12, 2007Date of Patent: July 12, 2011Assignees: Samsung Electronics Co., Ltd., Seoul National University Industry FoundationInventors: Jun-Mo Koo, Jin-Young Choi, Dong-Hoon Jang, Byung-Kwon Kang, Pyo-Jae Kim, Dong-Sung Song, Hyung-Jin Jang
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Publication number: 20100321770Abstract: Disclosed is a hybrid Infrared Ray (IR) cut-off filter for a digital camera, which includes an absorption filter plate for absorbing infrared rays, a reflection coating layer formed on a top or bottom side of the absorption filter plate so as to reflect infrared rays, and an anti-reflection coating layer formed on the top or bottom side of the absorption filter plate opposite the reflection coating layer, so as to allow visible rays to pass through the anti-reflection coating layer. The hybrid IR cut-off filter can provide an excellent IR cut-off function even in a slim digital camera module. Also, the hybrid IR cut-off filter can prevent the image quality from being degraded due to the IR transmittance difference according to the change in the incidence angle of an incident light, thereby overcoming the problem of color difference according to the color temperature.Type: ApplicationFiled: June 22, 2010Publication date: December 23, 2010Inventors: Sun-Hyoung Pyo, Byung-Kwon Kang
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Patent number: 7856176Abstract: A method and apparatus for compensating hand-trembling of a camera with reduced time required for capture compensated images. The method may include: calculating exposure time proper for preventing hand-trembling using an AE (Automatic Exposure) algorithm during an image-capturing standby mode; executing image-capturing multiple times depending on the exposure time at the time of inputting a photographing signal through a photographing button, and detecting the amount of hand-trembling at each time of image-capturing. The storing of images can be selected by a preset number of required images from the captured images as resultant images, the images being sequentially stored from an image having a lowest amount of hand-trembling as a resultant image, whereby an image with reduced hand-trembling can be obtained.Type: GrantFiled: July 9, 2008Date of Patent: December 21, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Young-Kwon Yoon, Yong-Gu Lee, Byung-Kwon Kang
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Publication number: 20090147141Abstract: A method and apparatus for video telephony in a mobile terminal includes: extracting, after establishment of a video call, a facial feature from a video image captured by a camera unit of the mobile terminal, comparing the extracted facial feature with that of a pre-stored reference image, and correcting the video image according to the facial feature of the reference image. The corrected video image is transmitted to a counterpart of the video call.Type: ApplicationFiled: December 2, 2008Publication date: June 11, 2009Inventors: Hae Sun Lee, Byung Kwon Kang, Young Kwon Yoon, Yong Gu Lee, Myoung Won Kim
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Publication number: 20090143099Abstract: Provided are a mobile communication terminal and a photography method for the same using a conversion lens. The mobile communication terminal includes a terminal body, a camera assembly installed at one side of the terminal body and a conversion lens detachably installed on a front surface of the camera assembly, wherein product data of the conversion lens mounted on the camera assembly are automatically identified and a microcomputer installed in the terminal body automatically adjusts a photography mode such that a special photography mode is entered without requiring any professional knowledge.Type: ApplicationFiled: November 24, 2008Publication date: June 4, 2009Inventor: Byung-Kwon KANG
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Publication number: 20090102837Abstract: A three-dimensional (3D) graphic rendering apparatus is provided. The 3D graphic rendering apparatus includes an object-information extraction module which extracts a bound box of each of a plurality of objects, including an i-th object and a j-th object, wherein i and j are natural numbers; an object alignment module which aligns the i-th object and the j-th object according to distances of the i-th and j-th objects, based on the extracted bound boxes of the i-th and j-th objects, from a visual point; and a rendering module which sequentially renders the aligned i-th and j-th objects such that an object among the i-th and j-th objects distant from the visual point can be rendered earlier than an object among the i-th and j-th objects less distant from the visual point.Type: ApplicationFiled: October 17, 2008Publication date: April 23, 2009Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Byung-Kwon KANG, Sung-Hee CHO
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Patent number: 7489340Abstract: Disclosed is an optical image stabilizer for use with a camera lens assembly. The optical image stabilizer including a fixable substrate; a movable substrate movably disposed on the fixable substrate, a fixable comb structure fixed on the fixable substrate and disposed on the movable substrate, and a movable comb structure disposed on the movable substrate and capable of moving on the fixable substrate with the movable substrate, wherein the movable substrate is moved by an attraction force acting between the fixable comb structure and the movable comb structure, when an electromotive force is applied to the fixable comb structure and the movable comb structure. In the optical image stabilizer, the movable substrate on which an image sensor is disposed and the elements for moving the movable substrate are manufactured using MEMS technology, thereby facilitating downsizing of optical image stabilizers and improving the precision of products.Type: GrantFiled: March 9, 2005Date of Patent: February 10, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Jun-Mo Koo, Myoung-Won Kim, Byung-Kwon Kang
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Publication number: 20090015921Abstract: A method and apparatus for compensating hand-trembling of a camera with reduced time required for capture compensated images. The method may include: calculating exposure time proper for preventing hand-trembling using an AE (Automatic Exposure) algorithm during an image-capturing standby mode; executing image-capturing multiple times depending on the exposure time at the time of inputting a photographing signal through a photographing button, and detecting the amount of hand-trembling at each time of image-capturing. The storing of images can be selected by a preset number of required images from the captured images as resultant images, the images being sequentially stored from an image having a lowest amount of hand-trembling as a resultant image, whereby an image with reduced hand-trembling can be obtained.Type: ApplicationFiled: July 9, 2008Publication date: January 15, 2009Inventors: Young-Kwon YOON, Yong-Gu Lee, Byung-Kwon Kang
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Patent number: 7450317Abstract: A zoom lens includes a first lens group having a negative refracting power, a second lens group having a positive refracting power and being aligned closer to an image surface than the first lens group, and a third lens group aligned closer to the image surface than the second lens group. The distance between first and second lens groups is shortened and the distance between second and third lens groups is lengthened as the zoom lens performs zooming action from a wide angle position to a telephoto position.Type: GrantFiled: March 24, 2006Date of Patent: November 11, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Jeong-Kil Shin, Byung-Kwon Kang, Dong-Hoon Jang
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Patent number: 7414767Abstract: A semiconductor optical device, which includes a semiconductor substrate, an electro-absorption modulator, and at least one optical device is monolithically integrated on the semiconductor substrate. An insulative layer surrounds the electro-absorption modulator and the optical devices on the semiconductor substrate, at least two metallic pads, one of which being an electrode of the modulator, are formed at a distance from each other on the insulative layer. A plurality of metallic wires are adapted for electrically connecting the electro-absorption modulator to the metallic pads and adjusting a value of inductance of the electro-absorption modulator. The metallic wires are formed on the insulative layer. A dielectric layer formed under the insulative layer provides a minimizing of parasitic capacitance generated in the metallic pads and the metallic wires by being formed under the metallic pads and the metallic wires.Type: GrantFiled: July 21, 2004Date of Patent: August 19, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Yu-Dong Bae, Byung-Kwon Kang
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Publication number: 20080195236Abstract: A PID controlling apparatus and method for providing a control value to a control object according to the difference between an output value of the control object and a target value are provided, in which an error calculator outputs an error value between the target value and the output value of the control object, a PID operator calculates a proportional value, an integral value, and a derivative value of the error value, calculates the control value using the proportional value, the integral value, and the derivative value, and outputs the control value to the control object, a first sampler samples the output value of the control object a plurality of times with respect to the target value and outputs a sampled output value, and a controller controls the PID operator to repeat a PID operation and output the control value according to a sampling period of the first sampler.Type: ApplicationFiled: December 12, 2007Publication date: August 14, 2008Inventors: Jun-Mo Koo, Jin-Young Choi, Dong-Hoon Jang, Byung-Kwon Kang, Pyo-Jae Kim, Dong-Sung Song, Hyung-Jin Chang
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Publication number: 20080152332Abstract: A hand-shake correction apparatus and method for a camera module for typical use in a mobile device. A camera unit includes an angular velocity sensor for sensing an angular velocity of a hand-shake motion of a camera, a position detection sensor for detecting a current position of an image sensor, and an actuator for actuating the image sensor. An Optical Image Stabilizer (OIS) circuit unit controls the actuator using a multi-rate Proportional Integrate Derivative (PID) control scheme that performs control a plurality of times using a shorter control period compared with existing PID controls for a basic period, in which a reference value is updated according to a control reference value by which the image sensor optimally shifts to correct a hand-shake motion.Type: ApplicationFiled: December 18, 2007Publication date: June 26, 2008Inventors: Jun-Mo Koo, Jin-Young Choi, Byung-Kwon Kang, Dong-Hoon Jang, Pyo-Jae Kim, Dong-Sung Song, Hyung-Jin Chang
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Patent number: 7350990Abstract: In a shutter device for use with a camera lens assembly, the shutter device includes a shutter base, a shutter blade is rotatably mounted on the shutter base, a magnet movably coupled to the shutter base so as to enable rotation of the shutter blade, and a yoke extending lengthwise while facing the magnet wherein the movement range of the shutter base is limited within a length of the yoke. The zoom-in/zoom-out operation is enabled by moving only the shutter base, thus enabling a compact size fabrication of the camera lens assembly. The shutter blade is easily installed adjacent to a diaphragm, and the operational speed of the shutter blade is controlled by adjusting the structure of an electronic coil.Type: GrantFiled: May 16, 2005Date of Patent: April 1, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Jeong-Kil Shin, Byung-Kwon Kang
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Publication number: 20080049334Abstract: Disclosed is a zoom lens optical system. The optical system includes a first lens group, which is fixed and has a total reflection prism, the prism turning an optical axis from an object side to an image side, and the first lens group having a positive lens power, a second lens group having a negative lens power, a third lens group having a positive lens power; and a fourth lens group having a positive lens power. The first through fourth lens groups are sequentially arranged from the object side to the image side, and the fourth lens group is fixed while magnification variation is executed by moving the second lens group and the third lens group.Type: ApplicationFiled: August 3, 2007Publication date: February 28, 2008Inventors: Jeong-Kil Shin, Byung-Kwon Kang, Sung-Woo Kim, Yong-Nam Kim
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Patent number: 7288422Abstract: A photonic integrated device using a reverse-mesa structure and a method for fabricating the same are disclosed. The photonic integrated device includes a first conductive substrate on which a semiconductor laser, an optical modulator, a semiconductor optical amplifier, and a photo detector are integrated, a first conductive clad layer and an active layer sequentially formed on the first conductive substrate in the form of a mesa structure, a second conductive clad layer formed on the active layer in the form of a reverse-mesa structure, an ohmic contact layer formed on the second clad layer in such a manner that the ohmic contact layer has a width narrower than the width of an upper surface of the second conductive clad layer, a current shielding layer filled in a sidewall having a mesa and reverse-mesa structure, and at least one window area formed between the above elements.Type: GrantFiled: November 18, 2004Date of Patent: October 30, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Byeong-Hoon Park, Yu-Dong Bae, In Kim, Byung-Kwon Kang, Young-Hyun Kim, Sang-Moon Lee