Patents by Inventor Min-Soo Choi
Min-Soo Choi 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).
-
Publication number: 20120146543Abstract: A connector for a light source module includes a body portion and a terminal portion. The body portion includes a first opening portion and a second opening portion. The first opening portion receives a portion of the light source module. The second opening portion receives a portion of a light source driver which drives the light source module. The terminal portion includes a first terminal and a second terminal. The first terminal is in the first opening portion of the body portion. The second terminal is connected to the first terminal. The second terminal is in the second opening portion of the body portion.Type: ApplicationFiled: July 13, 2011Publication date: June 14, 2012Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jin-Won JANG, Moon-Shik KANG, Young-Sup KWON, Min-Soo CHOI, Seung-Wan KIM
-
Publication number: 20120062131Abstract: A light source apparatus includes a plurality of light source parts, a power supply part, a current selection part and a current control part. The plurality of the light source parts are connected in parallel and the power supply part provides power to a first terminal of each of the light source parts. The current selection part selects the current level of one of the light source parts as a reference current level. The current control part adjusts the levels of the currents flowing through the light source parts to be substantially equal to the reference current level. Selection of the light source part that provides the reference current level is dynamically changed.Type: ApplicationFiled: August 26, 2011Publication date: March 15, 2012Inventors: Min-Soo CHOI, Jin-Won Jang, Won-Sik Oh
-
Patent number: 8111005Abstract: In a voltage supply module and a backlight assembly having the same, a converter is disposed on a first face of a board and converts basic voltage into driving voltage. A capacitor includes at least one first electrode connected to an output line of the converter and at least one second electrode disposed to be spaced apart from the first electrode along a direction substantially parallel with the first face. A plurality of the second electrodes are disposed on the board between the first electrodes. The first and second electrodes form a ballast capacitance.Type: GrantFiled: December 15, 2008Date of Patent: February 7, 2012Assignee: Samsung Electronics Co., LtdInventors: Min-Soo Choi, Jae-Eun Um
-
Publication number: 20110279485Abstract: A display apparatus includes a backlight unit which emits a light, and a display panel which receives the light to display an image. The backlight unit includes a driving circuit which outputs a driving voltage and a reference voltage; and p light source blocks connected to the driving circuit, p being a natural number greater than or equal to 2, where each light source block of the p light source blocks receives the driving voltage through a first terminal thereof and the reference voltage through a second terminal thereof to generate the light, and the p light source blocks are divided into a plurality of groups, each group including at least two light source blocks. The driving circuit includes a first switching section which applies the driving voltage to first terminals of the p light source blocks, and a second switching section which applies the reference voltage to the second terminal of at least one of the p light source blocks.Type: ApplicationFiled: December 20, 2010Publication date: November 17, 2011Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jin-Won JANG, Youngsup KWON, Won Sik OH, Min-Soo CHOI
-
Patent number: 8030858Abstract: An inverter circuit for a backlight device includes an inverter transformer which supplies a high AC voltage to a plurality of discharge tubes, a filter circuit connected to an output terminal of the inverter transformer, and an abnormal discharge detection circuit. The filter circuit passes a current signal having a high frequency component of the high AC voltage to the abnormal discharge detection circuit, and the abnormal discharge detection circuit detects an abnormal discharge current based on the current signal.Type: GrantFiled: October 31, 2008Date of Patent: October 4, 2011Assignee: Samsung Electronics Co., Ltd.Inventors: Min-Soo Choi, Osamu Sengoku, Tatsuhisa Shimura
-
Publication number: 20110175547Abstract: A backlight unit includes a driving circuit, a plurality of light source strings, and an error detector. The driving circuit outputs a driving voltage. Each of the light source strings includes a plurality of light sources and receives the driving voltage through input terminals of the light source strings to generate a light. The error detector is connected to output terminals of the light source strings and senses voltages between the input terminals and the output terminals of the light source strings to detect an error in the light sources using a first voltage and a second voltage. The first voltage is a voltage difference between a maximum and a minimum of the sensed voltages and the second voltage is obtained by dividing one sensed voltage of the sensed voltages by a number of the light sources of a light source string from which the one sensed voltage is sensed.Type: ApplicationFiled: October 12, 2010Publication date: July 21, 2011Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Won-Sik OH, Youngsup KWON, Min-Soo CHOI
-
Publication number: 20110101874Abstract: A method of driving a light source apparatus includes inverting a direct current voltage to generate a first alternating current voltage, transforming the first alternating current voltage into a second alternating current voltage having a voltage level that is greater than a voltage level of the first alternating current voltage, compensating a driving alternating current voltage based on the second alternating current voltage to generate a compensated driving alternating current voltage such that a substantially equal current flows through each light emitting string of a plurality of light emitting string included in the light source apparatus, and rectifying the compensated driving alternating current voltage to apply a driving voltage to the light emitting strings.Type: ApplicationFiled: April 21, 2010Publication date: May 5, 2011Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Won-SiK OH, Moon-Shik KANG, Young-Sup KWON, Hwan-Woong LEE, Min-Soo CHOI, Byeong-Hwan KIM
-
Publication number: 20110032179Abstract: A backlight unit includes light source groups, a converter, a compensator, a detector and a protector. Each of the light source groups includes a light source, and the converter boosts an input voltage to a driving voltage that is supplied to the light source groups. The compensator is connected to the light source groups and compensates a deviation between currents fed back to the compensator from each of the light source groups. The detector is connected between the compensator and the light source groups and detects a maximum voltage from among feedback voltages fed back to the compensator from each of the light source groups. The protector is connected to the detector and receives the maximum voltage, and compares the maximum voltage to a reference voltage to generate a compared result. The protector outputs a protection signal to the converter based on the compared result.Type: ApplicationFiled: February 14, 2010Publication date: February 10, 2011Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Min-Soo Choi, Hwanwoong Lee, Won Sik Oh
-
Patent number: 7868972Abstract: A light source unit which can minimize current differences between a plurality of light emitting diodes (“LEDs”) includes a printed circuit board (“PCB”) which includes an active region that emits light and an inactive region that accounts for a remainder of the PCB, an LED array which includes a plurality of LEDs that are arranged at regular intervals, and a current balancing circuit which is disposed in the inactive region, generates a plurality of current balancing voltages by uniformly adjusting current differences between the LEDs, and outputs the current balancing voltages. A liquid crystal display (“LCD”) including the light source unit, and a method of minimizing current differences between a plurality of LEDs are further provided.Type: GrantFiled: February 5, 2008Date of Patent: January 11, 2011Assignee: Samsung Electronics Co., Ltd.Inventors: Min-soo Choi, Jae-eun Um, Song-yi Han
-
Patent number: 7812541Abstract: A liquid crystal display device includes a liquid crystal display panel, a lamp disposed behind the liquid crystal display panel, a cover accommodating the lamp, and an inverter disposed behind the cover. The inverter includes a substrate and a transformer mounted on the substrate and driving the lamp. The transformer includes a core and a coil that is wound around at least a part of the core. The liquid crystal display panel further includes a transformer cover which covers the coil, an inverter cover which covers the inverter and the transformer cover, and a metal member in the transformer cover.Type: GrantFiled: October 31, 2007Date of Patent: October 12, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Yun-gun Lee, Moon-shik Kang, Min-soo Choi
-
Publication number: 20100134532Abstract: A method for driving a light source and maintaining its target white color coordinates despite of varied and decreased light source luminance includes detecting an amount of colored light generated from a plurality of colored light sources, comparing detected colored light to reference data and verifying that colored light source has the correct preset duty cycle colored light. If the colored light source is driven by the preset duty cycle, the method includes modifying the reference data based on the detected light from the colored light source and adjusting the amount of colored light by controlling a driving signal to the colored light sources based on the modified reference data.Type: ApplicationFiled: October 1, 2009Publication date: June 3, 2010Inventors: Min-Soo CHOI, Min-Gyu Kim
-
Patent number: 7723924Abstract: A backlight inverter includes a transformer boosting an input voltage at a ratio of a primary winding to a secondary winding of the transformer and outputting a first voltage and a second voltage; a protection level signal generator causing a phase delay between the first voltage and the second voltage, and generating a protection level signal, the protection level signal being a sum of the phase reversed first voltage and the second voltage; and an arc state detector comparing the protection level signal with a reference voltage and generating a detection signal; and a diving controller maintaining or stopping a supplying of an input voltage to the transformer in response to the detection signal, wherein in addition to the phase delay, another phase delay is caused by an open circuit in the transformer, so that a maximum value of the protection level signal is larger than the reference voltage and the input voltage is stopped.Type: GrantFiled: March 31, 2008Date of Patent: May 25, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Song-Yi Han, Min-Soo Choi, Jin-Taek Hong
-
Publication number: 20090261755Abstract: An inverter circuit for a backlight device includes an inverter transformer which supplies a high AC voltage to a plurality of discharge tubes, a filter circuit connected to an output terminal of the inverter transformer, and an abnormal discharge detection circuit. The filter circuit passes a current signal having a high frequency component of the high AC voltage to the abnormal discharge detection circuit, and the abnormal discharge detection circuit detects an abnormal discharge current based on the current signal.Type: ApplicationFiled: October 31, 2008Publication date: October 22, 2009Applicant: SAMSUNG ELECTRONICS CO., LTDInventors: Min-Soo CHOI, Osamu SENGOKU, Tatsuhisa SHIMURA
-
Publication number: 20090262276Abstract: A liquid crystal display (“LCD”) includes; a lower receiving container which includes; a bottom plate, sidewalls extending from the bottom plate, a first through-hole formed in the bottom plate, and a guide pole disposed on the bottom plate and which substantially surrounds the first through-hole, a plurality of light sources disposed within the lower receiving container; an optical sensor printed circuit board (“PCB”) attached to a bottom surface of the bottom plate, wherein the optical sensor printed circuit board covers the first through-hole, and an optical sensor mounted on the optical sensor PCB and inserted into the first through-hole.Type: ApplicationFiled: March 18, 2009Publication date: October 22, 2009Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Wee-Joon JEONG, Tae-Hyung KIM, Ki-Hong SONG, Young-Suk HA, Jin-Woo PARK, Min-Soo CHOI
-
Publication number: 20090184667Abstract: In a voltage supply module and a backlight assembly having the same, a converter is disposed on a first face of a board and converts basic voltage into driving voltage. A capacitor includes at least one first electrode connected to an output line of the converter and at least one second electrode disposed to be spaced apart from the first electrode along a direction substantially parallel with the first face. A plurality of the second electrodes are disposed on the board between the first electrodes. The first and second electrodes form a ballast capacitance.Type: ApplicationFiled: December 15, 2008Publication date: July 23, 2009Inventors: Min-Soo Choi, Jae-Eun Um
-
Publication number: 20080258645Abstract: A backlight inverter includes a transformer boosting an input voltage at a ratio of a primary winding to a secondary winding of the transformer and outputting a first voltage and a second voltage; a protection level signal generator causing a phase delay between the first voltage and the second voltage, and generating a protection level signal, the protection level signal being a sum of the phase reversed first voltage and the second voltage; and an arc state detector comparing the protection level signal with a reference voltage and generating a detection signal; and a diving controller maintaining or stopping a supplying of an input voltage to the transformer in response to the detection signal, wherein in addition to the phase delay, another phase delay is caused by an open circuit in the transformer, so that a maximum value of the protection level signal is larger than the reference voltage and the input voltage is stopped.Type: ApplicationFiled: March 31, 2008Publication date: October 23, 2008Inventors: Song-Yi Han, Min-Soo Choi, Jin-Taek Hong
-
Publication number: 20080198299Abstract: A light source unit which can minimize current differences between a plurality of light emitting diodes (“LEDs”) includes a printed circuit board (“PCB”) which includes an active region that emits light and an inactive region that accounts for a remainder of the PCB, an LED array which includes a plurality of LEDs that are arranged at regular intervals, and a current balancing circuit which is disposed in the inactive region, generates a plurality of current balancing voltages by uniformly adjusting current differences between the LEDs, and outputs the current balancing voltages. A liquid crystal display (“LCD”) including the light source unit, and a method of minimizing current differences between a plurality of LEDs are further provided.Type: ApplicationFiled: February 5, 2008Publication date: August 21, 2008Applicant: SAMSUNG ELECTRONICS CO., LTDInventors: Min-soo CHOI, Jae-eun UM, Song-yi HAN
-
Publication number: 20080137336Abstract: A backlight assembly includes a plurality of blocks and a driving substrate. Each of the blocks includes a plurality of light emitting diodes. Sides of adjacent blocks are fitted to each other. The light emitting diodes are mounted on the driving substrate.Type: ApplicationFiled: October 31, 2007Publication date: June 12, 2008Inventors: Min-Soo Choi, Young-Sup Kwon
-
Publication number: 20080116819Abstract: A liquid crystal display device includes a liquid crystal display panel, a lamp disposed behind the liquid crystal display panel, a cover accommodating the lamp, and an inverter disposed behind the cover. The inverter includes a substrate and a transformer mounted on the substrate and driving the lamp. The transformer includes a core and a coil that is wound around at least a part of the core. The liquid crystal display panel further includes a transformer cover which covers the coil, an inverter cover which covers the inverter and the transformer cover, and a metal member in the transformer cover.Type: ApplicationFiled: October 31, 2007Publication date: May 22, 2008Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Yun-gun LEE, Moon-shik KANG, Min-soo CHOI