Cho; Kun Ho

Patent Applications and Registrations

Patent applications and USPTO patent grants for Cho; Kun Ho.The latest application filed is for "illuminating apparatus and liquid crystal display having the same".

Company Profile

1.103.107

Cho; Kun Ho - Suwon-si KR
Cho; Kun Ho - Suwon KR
Cho; Kun-ho - Gyeonggi-do KR
Cho; Kun-Ho - Suwon-city KR
Cho; Kun-Ho - Kyungki-do KR
Cho, Kun-ho - Gyenggi-do KR
Cho; Kun-ho - Cyconggi-do KR
Cho, Kun-ho - Gyeonngi-do KR
Cho, Kun-Ho - Cyeonggi-do KR
Cho; Kun-Ho - Maetan-dong Paldal-gu KR

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Liquid crystal display and LED module thereof Grant RE48,053 - Choi , et al.	2020-06-16
Illuminating apparatus and liquid crystal display having the same Grant 10,133,119 - Lee , et al. November 20, 2	2018-11-20
Display device Grant 10,067,385 - Jeon , et al. September 4, 2	2018-09-04
Illuminating Apparatus And Liquid Crystal Display Having The Same App 20170307938 - LEE; Young-min ; et al.	2017-10-26
Illuminating apparatus and liquid crystal display having the same Grant 9,733,516 - Lee , et al. August 15, 2	2017-08-15
Display apparatus having bezel hiding member Grant 9,709,783 - Kim , et al. July 18, 2	2017-07-18
Display apparatus Grant 9,519,168 - Choi , et al. December 13, 2	2016-12-13
Display Device App 20160282670 - JEON; Jong Pil ; et al.	2016-09-29
Backlight unit and liquid crystal display apparatus having the same Grant 9,366,398 - Jang , et al. June 14, 2	2016-06-14
Liquid crystal display module and liquid crystal display device having the same Grant 9,239,481 - Jung , et al. January 19, 2	2016-01-19
Backlight unit and manufacturing method thereof, and liquid crystal display device having the same Grant 9,201,266 - Hur , et al. December 1, 2	2015-12-01
3D image display apparatus and driving method thereof Grant 9,087,470 - Hur , et al. July 21, 2	2015-07-21
Display Apparatus Having Bezel Hiding Member App 20150116852 - KIM; Jong-hoi ; et al.	2015-04-30
Curved display device Grant 8,979,294 - An , et al. March 17, 2	2015-03-17
Backlight Unit And Liquid Crystal Display Apparatus Having The Same App 20150055058 - JANG; Na-won ; et al.	2015-02-26
Display Apparatus And Control Method Thereof App 20150049283 - HWANG; Ju-seong ; et al.	2015-02-19
Illuminating Apparatus And Liquid Crystal Display Having The Same App 20140354914 - LEE; Young-min ; et al.	2014-12-04
Backlight assembly and display apparatus including the same Grant 8,888,351 - Lee , et al. November 18, 2	2014-11-18
Display apparatus and method for improving image quality thereof Grant 8,816,955 - Kang , et al. August 26, 2	2014-08-26
Light emitting unit and liquid crystal display apparatus having the same Grant 8,773,618 - Seo , et al. July 8, 2	2014-07-08
Liquid crystal display and LED module thereof Grant 8,773,617 - Choi , et al. July 8, 2	2014-07-08
Curved Display Device App 20140078720 - AN; Jun Seok ; et al.	2014-03-20
Liquid crystal display and LED module thereof Grant 8,665,398 - Choi , et al. March 4, 2	2014-03-04
Backlight Unit And Liquid Crystal Display Having The Same App 20140009718 - HUR; Gil Tae ; et al.	2014-01-09
Liquid Crystal Display Module And Liquid Crystal Display Device Having The Same App 20140002765 - JUNG; Sun Mi ; et al.	2014-01-02
Liquid crystal display module and liquid crystal display device having the same Grant 8,599,329 - Kang , et al. December 3, 2	2013-12-03
Display Apparatus App 20130278860 - CHOI; Suk-ju ; et al.	2013-10-24
Backlight Unit And Image Display Apparatus Having The Same App 20130258717 - HUR; Gil-tae ; et al.	2013-10-03
Backlight unit and liquid crystal display having the same Grant 8,547,498 - Hur , et al. October 1, 2	2013-10-01
Liquid crystal display module and liquid crystal display device having the same Grant 8,547,497 - Jung , et al. October 1, 2	2013-10-01
Light Guide Panel And Backlight Unit Having The Same App 20130242612 - LEE; Dae-hee ; et al.	2013-09-19
Light Guide Plate, Backlight Unit Including The Same, Display Apparatus, And Method Of Manufacturing The Same App 20130215645 - JANG; Nae-won ; et al.	2013-08-22
Liquid Crystal Display And Led Module Thereof App 20130100373 - CHOI; Suk Ju ; et al.	2013-04-25
Display Module App 20130077026 - SEO; Jeong Phil ; et al.	2013-03-28
Light Emitting Unit And Liquid Crystal Display Apparatus Having The Same App 20130050616 - SEO; Jeong-phil ; et al.	2013-02-28
Backlight Unit And Manufacturing Method Thereof, And Liquid Crystal Display Device Having The Same App 20130050612 - HUR; Gil-tae ; et al.	2013-02-28
Liquid crystal display and LED module thereof Grant 8,358,387 - Choi , et al. January 22, 2	2013-01-22
Backlight Assembly And Display Apparatus Including The Same App 20120307518 - LEE; Young-min ; et al.	2012-12-06
Liquid Crystal Display And Led Module Thereof App 20120281165 - CHOI; Suk Ju ; et al.	2012-11-08
Projection-type image display apparatus and method Grant RE43,743 - Cho , et al. October 16, 2	2012-10-16
Liquid Crystal Display And Led Module Thereof App 20120236231 - CHOI; Suk Ju ; et al.	2012-09-20
3d Image Display Apparatus, 3d Glasses, And Driving Methods Of The 3d Image Display Apparatus And The 3d Glasses App 20120236406 - HUR; Gil-tae ; et al.	2012-09-20
Liquid Crystal Display Panel And Apparatus Including The Same App 20120169972 - JUNG; Il-yong ; et al.	2012-07-05
3d Image Display Apparatus And Driving Method Thereof App 20120154463 - HUR; Gil-tae ; et al.	2012-06-21
Display Apparatus And Method For Improving Image Quality Thereof App 20120105518 - KANG; Jeong-il ; et al.	2012-05-03
Liquid Crystal Display Module And Liquid Crystal Display Device Having The Same App 20120092584 - JUNG; Sun Mi ; et al.	2012-04-19
Liquid Crystal Display Module And Liquid Crystal Display Device Having The Same App 20120069262 - KANG; Jeong Il ; et al.	2012-03-22
Backlight Unit And Liquid Crystal Display Having The Same App 20120069263 - HUR; Gil Tae ; et al.	2012-03-22
Direct viewing type stereoscopic image display apparatus which can remove moire pattern Grant 7,889,152 - Kim , et al. February 15, 2	2011-02-15
Projection type image display device Grant 7,789,516 - Lee , et al. September 7, 2	2010-09-07
Liquid crystal display and method for controlling brightness of an image Grant 7,728,926 - Lee , et al. June 1, 2	2010-06-01
Back Light Unit And Image Display Device Using The Same App 20100085733 - YOO; Jun-mo ; et al.	2010-04-08
Projection-type 3-D image display using single projector Grant 7,607,780 - Kim , et al. October 27, 2	2009-10-27
Backlight Unit And Image Display Module For Improving Brightness Uniformity, And A Method For Arranging Backlight Unit App 20090051849 - HWANG; Ju-seong ; et al.	2009-02-26
Slim optical projection system and image display apparatus employing the same Grant 7,448,756 - Cho , et al. November 11, 2	2008-11-11
Multi-display apparatus having an optical path changing device Grant 7,439,938 - Cho , et al. October 21, 2	2008-10-21
High efficiency lighting system, scrolling unit and projection system employing the same Grant 7,367,677 - Kim , et al. May 6, 2	2008-05-06
Near-field optical storage medium and optical data storage system therefor Grant 7,362,693 - Lee , et al. April 22, 2	2008-04-22
Display Device And Backlight Unit App 20080049280 - LEE; Jong-soo ; et al.	2008-02-28
Reflection unit having a mirror array, and projection display system employing the same Grant 7,331,679 - Cho , et al. February 19, 2	2008-02-19
Display Device Having Dimming Panel, Dimming Panel Driving Device, And Control Method Thereof App 20080030449 - Lee; Kye-hoon ; et al.	2008-02-07
High resolution 3-D image display with liquid crystal shutter array Grant 7,327,410 - Cho , et al. February 5, 2	2008-02-05
Projection type image display system capable of color scrolling Grant 7,327,409 - Kim , et al. February 5, 2	2008-02-05
Color separating unit and projection type image display apparatus employing the same App 20080024730 - Kim; Dae-sik ; et al.	2008-01-31
Backlight unit and display apparatus having the same App 20080025041 - Lee; Kye-hoon ; et al.	2008-01-31
Display apparatus using laser and method of using the same App 20070296645 - Lee; Kye-hoon ; et al.	2007-12-27
Liquid crystal display and method for controlling brightness of an image App 20070290966 - Lee; Jong-soo ; et al.	2007-12-20
Backlight unit and display apparatus having the same App 20070273810 - Lee; Kye-hoon ; et al.	2007-11-29
Illuminating optical system, image display apparatus using same and image display method Grant 7,298,556 - Cho , et al. November 20, 2	2007-11-20
Color separating unit and projection type image display apparatus employing the same Grant 7,287,858 - Kim , et al. October 30, 2	2007-10-30
Light source performing scanning operation twice, image apparatus using the light source, and method of driving the light source App 20070200866 - Lee; Kye-hoon ; et al.	2007-08-30
Illumination system providing light of Gaussian distribution, projection system, and method of forming color image Grant 7,241,027 - Cho , et al. July 10, 2	2007-07-10
Projection system using spatial filter Grant 7,226,169 - Kim , et al. June 5, 2	2007-06-05
High efficiency projection system and method of forming color image using the same Grant 7,210,787 - Kim , et al. May 1, 2	2007-05-01
Objective lens for high-density optical focusing and an optical disk in an optical pickup Grant 7,200,098 - Yoo , et al. April 3, 2	2007-04-03
Projection type image display device App 20070070299 - Lee; Young-chol ; et al.	2007-03-29
Optical pickup including a many-sided reflection prism and method of using the optical pickup Grant 7,177,260 - Kim , et al. February 13, 2	2007-02-13
Projection display with polarization beam splitter Grant 7,175,280 - Kim , et al. February 13, 2	2007-02-13
Optical combining device Grant 7,177,084 - Kim , et al. February 13, 2	2007-02-13
Projection system and method Grant 7,163,293 - Kim , et al. January 16, 2	2007-01-16
Projection system with scrolling unit Grant 7,150,532 - Kim , et al. December 19, 2	2006-12-19
Projection system using spatial filter Grant 7,140,737 - Kim , et al. November 28, 2	2006-11-28
Projection system using spatial filter Grant 7,131,734 - Kim , et al. November 7, 2	2006-11-07
Color illuminating system and projection type image display apparatus using the same Grant 7,119,964 - Kim , et al. October 10, 2	2006-10-10
Projection TV App 20060221258 - Lee; Jong-Soo ; et al.	2006-10-05
Optical combining device Grant 7,113,343 - Kim , et al. September 26, 2	2006-09-26
Color scrollable projection system Grant 7,104,651 - Kim , et al. September 12, 2	2006-09-12
Near-field optical storage medium and optical data storage system therefor App 20060198278 - Lee; Chul-Woo ; et al.	2006-09-07
Highly efficient projection system Grant 7,097,308 - Kim , et al. August 29, 2	2006-08-29
Scrolling unit, color illuminating system, and projection system using the scrolling unit Grant 7,090,359 - Kim , et al. August 15, 2	2006-08-15
Reflection type compound prism and optical pickup apparatus employing the same Grant 7,088,664 - Kim , et al. August 8, 2	2006-08-08
Direct viewing type stereoscopic image display apparatus which can remove moire pattern App 20060170834 - Kim; Tae-hee ; et al.	2006-08-03
Illumination optical system, image display apparatus using same and image display method App 20060146414 - Cho; Kun-ho ; et al.	2006-07-06
Projection-type 3-D image display using single projector App 20060146287 - Kim; Tae-hee ; et al.	2006-07-06
Optical pickup device and recording medium used therefor Grant 7,072,254 - Kim , et al. July 4, 2	2006-07-04
Optical pickup using an optical phase plate and which is compatible with optical recording media of different types Grant 7,072,114 - Yoo , et al. July 4, 2	2006-07-04
3-D image display device App 20060139751 - Cha; Kyung-hoon ; et al.	2006-06-29
Projection type image display system capable of color scrolling Grant 7,066,602 - Lee , et al. June 27, 2	2006-06-27
Light pipe, color illumination system adopting the light pipe, and projection system employing the color illumination system Grant 7,066,604 - Kim , et al. June 27, 2	2006-06-27
Near-field optical storage medium and optical data storage system therefor Grant 7,054,259 - Lee , et al. May 30, 2	2006-05-30
Cylindrical lens array for scrolling colors, projection system using same, and scrolling method Grant 7,048,381 - Kim , et al. May 23, 2	2006-05-23
High efficiency lighting system, scrolling unit and projection system employing the same App 20060087619 - Kim; Dae-sik ; et al.	2006-04-27
Slim optical projection system and image display apparatus employing the same App 20060066760 - Cho; Kun-ho ; et al.	2006-03-30
Lens device including a light controlling mechanism and an optical pickup apparatus using a lens device Grant RE39,025 - Lee , et al. March 21, 2	2006-03-21
Optical recording and pickup head for digital versatile disc compatible with read-writable compact disc by adopting flat plate lens having staircase type diffraction grating structure Grant 7,016,291 - Yoo , et al. March 21, 2	2006-03-21
Projection system using spatial filter App 20060055890 - Kim; Dae-sik ; et al.	2006-03-16
Projection system using spatial filter App 20060055889 - Kim; Dae-sik ; et al.	2006-03-16
Highly efficient projection system and color scrolling method therefor Grant 7,011,414 - Kim , et al. March 14, 2	2006-03-14
Optical pickup using an optical phase plate and which is compatible with optical recording media of different types App 20060033996 - Yoo; Jang Hoon ; et al.	2006-02-16
Scrolling unit and projection system using the same Grant 6,997,562 - Cho , et al. February 14, 2	2006-02-14
Optical pickup using an optical phase plate and which is compatible with optical media for different types Grant 6,985,293 - Yoo , et al. January 10, 2	2006-01-10
Reflection unit having a mirror array, and projection display system employing the same App 20050286025 - Cho, Kun-ho ; et al.	2005-12-29
High-resolution display including pixel moving optical system Grant 6,971,748 - Cho , et al. December 6, 2	2005-12-06
Optical combining device App 20050249098 - Kim, Dae-sik ; et al.	2005-11-10
Color lighting apparatus and method and image projection apparatus and method using the same Grant 6,961,192 - Kim , et al. November 1, 2	2005-11-01
Objective lens for high-density optical focusing and an optical disk in an optical pickup Grant 6,938,890 - Yoo , et al. September 6, 2	2005-09-06
Optical disc having a substrate with micro-embossments for tracking guides App 20050169162 - Lee, Yong-Hoon ; et al.	2005-08-04
Objective lenes for high-density optical focusing and an optical disk in an optical pickup App 20050169154 - Yoo, Jang-hoon ; et al.	2005-08-04
Color scrolling projection system Grant 6,921,171 - Lee , et al. July 26, 2	2005-07-26
Single-panel color image display apparatus Grant 6,913,360 - Cho , et al. July 5, 2	2005-07-05
Optical pickup for high density recording/reproduction and method to detect a reproduction signal Grant 6,914,858 - Cho July 5, 2	2005-07-05
Optical disc Grant 6,899,937 - Lee , et al. May 31, 2	2005-05-31
Near-field optical storage medium and optical data storage system therefor Grant 6,885,625 - Lee , et al. April 26, 2	2005-04-26
Scrolling projection system and method Grant 6,877,860 - Cho , et al. April 12, 2	2005-04-12
Projection system and method of forming color image Grant 6,877,861 - Cho , et al. April 12, 2	2005-04-12
Illumination optical unit employing dichroic mirror wheel and image display system including the illumination optical unit Grant 6,869,189 - Kim , et al. March 22, 2	2005-03-22
High resolution 3-D image display App 20050057702 - Cho, Kun-ho ; et al.	2005-03-17
Spiral lens disk and projection system employing the same Grant 6,850,369 - Kim , et al. February 1, 2	2005-02-01
Optical recording and pickup head for digital versatile disc compatible with read-writable compact disc by adopting flat plate lens having staircase type diffraction grating structure App 20050018584 - Yoo, Jang-Hoon ; et al.	2005-01-27
Illumination apparatus employing auxiliary light source and projection system including illumination apparatus App 20050013132 - Kim, Dae-sik ; et al.	2005-01-20
High efficiency projection system and method of forming color image using the same App 20050012904 - Kim, Dae-sik ; et al.	2005-01-20
Optical combining device App 20050012902 - Kim, Dae-sik ; et al.	2005-01-20
Highly efficient scrolling projection system and method Grant 6,843,567 - Lee , et al. January 18, 2	2005-01-18
Front projection type screen Grant 6,844,969 - Cho , et al. January 18, 2	2005-01-18
Light pipe, color illumination system adopting the light pipe, and projection system employing the color illumination system App 20040263793 - Kim, Sung-ha ; et al.	2004-12-30
Projection system with scrolling unit App 20040263789 - Kim, Sung-ha ; et al.	2004-12-30
Projection display with polarization beam splitter App 20040263788 - Kim, Sung-Ha ; et al.	2004-12-30
Scrolling unit and projection system using the same App 20040257387 - Cho, Kun-ho ; et al.	2004-12-23
Illumination system providing light of Gaussian distribution, projection system, and method of forming color image App 20040246586 - Cho, Kun-ho ; et al.	2004-12-09
Color illuminating system and projection type image display apparatus using the same App 20040246589 - Kim, Dae-sik ; et al.	2004-12-09
Color scrollable projection system App 20040246443 - Kim, Dae-sik ; et al.	2004-12-09
Projection system and method of forming color image App 20040246445 - Cho, Kun-ho ; et al.	2004-12-09
Color scrolling projection system App 20040246446 - Lee, Hee-joong ; et al.	2004-12-09
Projection type image display system capable of color scrolling App 20040246442 - Lee, Hee-joong ; et al.	2004-12-09
Projection system using spatial filter App 20040239881 - Kim, Dae-sik ; et al.	2004-12-02
Single-panel color image display apparatus and scrolling method Grant 6,824,270 - Kim , et al. November 30, 2	2004-11-30
Color separating unit and projection type image display apparatus employing the same App 20040233342 - Kim, Dae-sik ; et al.	2004-11-25
Highly efficient projection system App 20040233390 - Kim, Dae-sik ; et al.	2004-11-25
Scrolling unit, color illuminating system, and projection system using the scrolling unit App 20040227903 - Kim, Dae-sik ; et al.	2004-11-18
Near-field optical storage medium and optical data storage system therefor App 20040218500 - Lee, Chul-Woo ; et al.	2004-11-04
Colored light separating device and single-panel color image display apparatus using the same Grant 6,811,263 - Kim , et al. November 2, 2	2004-11-02
Projection type image display system capable of color scrolling App 20040196644 - Kim, Dae-sik ; et al.	2004-10-07
Near-field optical storage medium and optical data storage system therefor Grant 6,798,732 - Lee , et al. September 28, 2	2004-09-28
Optical pickup using an optical phase plate Grant 6,791,933 - Yoo , et al. September 14, 2	2004-09-14
Optical recording and pickup head for digital versatile disc compatible with read-writable compact disc by adopting flat plate lens having staircase type diffraction grating structure Grant 6,765,857 - Yoo , et al. July 20, 2	2004-07-20
Single-panel color image display apparatus and scrolling method App 20040130684 - Kim, Sung-ha ; et al.	2004-07-08
Cylindrical lens array for scrolling colors, projection system using same, and scrolling method App 20040119947 - Kim, Dae-sik ; et al.	2004-06-24
Highly efficient projection system and color scrolling method therefor App 20040114112 - Kim, Dae-sik ; et al.	2004-06-17
Illuminating optical system, image display apparatus using same and image display method App 20040105267 - Cho, Kun-ho ; et al.	2004-06-03
Colored light separating device and single-panel color image display apparatus using the same App 20040105266 - Kim, Sung-ha ; et al.	2004-06-03
Color lighting apparatus and method and image projection apparatus and method using the same App 20040105077 - Kim, Sung-Ha ; et al.	2004-06-03
Highly efficient scrolling projection system and method App 20040066494 - Lee, Hee-joong ; et al.	2004-04-08
Scrolling projection system and method App 20040061836 - Cho, Kun-Ho ; et al.	2004-04-01
Projecton system and method App 20040061839 - Kim, Dae-Sik ; et al.	2004-04-01
Single-panel color image display apparatus App 20040057018 - Cho, Kun-ho ; et al.	2004-03-25
High-resolution display including pixel moving optical system App 20040041784 - Cho, Kun-Ho ; et al.	2004-03-04
Spiral lens disk and projection system employing the same App 20040021944 - Kim, Tae-Hee ; et al.	2004-02-05
Illumination optical unit employing dichroic mirror wheel and image display system including the illumination optical unit App 20030234913 - Kim, Sung-Ha ; et al.	2003-12-25
Multi-display apparatus having an optical path changing device App 20030231144 - Cho, Kun-Ho ; et al.	2003-12-18
Optical recording and reproducing apparatus having floating swing arm and optical disk for use therewith Grant 6,657,942 - Lee , et al. December 2, 2	2003-12-02
Optical pickup using an optical phase plate and which is compatible with optical recording media of dirrerent types App 20030210638 - Yoo, Jang Hoon ; et al.	2003-11-13
Recording/reproducing apparatus including an optical pickup having an objective lens compatible with a plurality of optical disk formats Grant 6,639,889 - Yoo , et al. October 28, 2	2003-10-28
Projection type image display apparatus realizing three-dimensional image Grant 6,619,801 - Cho , et al. September 16, 2	2003-09-16
Optical storage medium having protective layer thicker than wavelength of useable light source Grant 6,621,787 - Lee , et al. September 16, 2	2003-09-16
Optical pickup device and recording medium used therefor App 20030076769 - Kim, Dae-sik ; et al.	2003-04-24
Recording/reproducing apparatus including an optical pickup having an objective lens compatible with a plurality of optical disk formats App 20030048738 - Yoo, Jang-Hoon ; et al.	2003-03-13
Optical disc App 20030026935 - Lee, Yong-Hoon ; et al.	2003-02-06
Projection display system in which remote control signals are transmitted to a screen App 20030020881 - Jung, Seung-Tae ; et al.	2003-01-30
Optical recording and pickup head for digital versatile disc compatible with read-writable compact disc by adopting flat plate lens having staircase type diffraction grating structure App 20030021215 - Yoo, Jang-Hoon ; et al.	2003-01-30
Optical pickup including a many-sided reflection prism and method of using the optical pickup App 20020181385 - Kim, Dae-sik ; et al.	2002-12-05
Reflection type compound prism and optical pickup apparatus employing the same App 20020172133 - Kim, Dae-sik ; et al.	2002-11-21
Near-field optical storage medium and optical data storage system therefor App 20020136146 - Lee, Chul-Woo ; et al.	2002-09-26
Near-field optical storage medium and optical data storage system therefor App 20020136148 - Lee, Chul-Woo ; et al.	2002-09-26
Front projection type screen App 20020126378 - Cho, Kun-ho ; et al.	2002-09-12
Optical recording and pickup head for digital versatile disc compatible with read-writable compact disc by adopting flat plate lens having staircase type diffraction grating structure Grant 6,449,237 - Yoo , et al. September 10, 2	2002-09-10
Projection type image display apparatus App 20020034015 - Cho, Kun-Ho ; et al.	2002-03-21
Swing-arm type optical recording and reproducing apparatus and optical disk applicable to the same App 20020024919 - Lee, Chul-woo ; et al.	2002-02-28
Projection-type image display apparatus and method App 20020012103 - Cho, Kun-ho ; et al.	2002-01-31
Optical pickup for high density recording/reproduction and method to detect a reproduction signal App 20020006101 - Cho, Kun-Ho	2002-01-17
Compatible optical pickup Grant 6,337,841 - Kim , et al. January 8, 2	2002-01-08
Optical pickup using an optical phase plate Grant 6,275,461 - Yoo , et al. August 14, 2	2001-08-14
Objective lens for high-density optical focusing and an optical disk in an optical pickup App 20010006434 - Yoo, Jang-hoon ; et al.	2001-07-05
Optical pickup using an optical phase plate App 20010000310 - Yoo, Jang Hoon ; et al.	2001-04-19
Optical pickup having an objective lens compatible with a plurality of optical disk formats Grant 6,198,714 - Yoo , et al. March 6, 2	2001-03-06
Optical pickup having an objective lens compatible with a plurality of optical disk formats Grant 6,091,691 - Yoo , et al. July 18, 2	2000-07-18
Optical pickup having plural optical sources and plural optical detectors Grant 5,933,401 - Lee , et al. August 3, 1	1999-08-03
Optical detector with two detecting regions for reproducing and recording information on two kinds of disks having different thicknesses Grant 5,802,037 - Lee , et al. September 1, 1	1998-09-01
Lens device comprising light blocking means and an optical pickup apparatus using the lens device Grant 5,665,957 - Lee , et al. September 9, 1	1997-09-09