Inventor
CHOI YANG-OH
KR21 patents
Patents
21 patentsUS5764621AJun 9, 1998
Optical disc with a plurality of recording layers
DAEWOO ELECTRONICS CO LTD74 citations96
US5995473ANov 30, 1999
Optical pickup system capable of selectively reading a multiple number of optical disks
DAEWOO ELECTRONICS CO LTD19 citations92
US5917800AJun 29, 1999
Optical pickup device for reproducing discs of two types with different densities by double beam focuses of different sizes
DAEWOO ELECTRONICS CO LTD26 citations92
US5809000ASep 15, 1998
Optical pickup system for reading optical disks of different thicknesses
DAEWOO ELECTRONICS CO LTD29 citations92
US5636190AJun 3, 1997
Optical pickup system for use with an optical disk having multiple reflection hologram film
DAEWOO ELECTRONICS CO LTD58 citations92
US5940360AAug 17, 1999
Optical pickup device for reproducing discs of two types with different densities by double beam focuses of different sizes
DAEWOO ELECTRONICS CO LTD18 citations84
US5883874AMar 16, 1999
Optical pickup system for selectively reading a multiple number of optical disks
DAEWOO ELECTRONICS CO LTD18 citations84
US5708641AJan 13, 1998
Multiple focus optical pickup system
DAEWOO ELECTRONICS CO LTD15 citations74
US5708643AJan 13, 1998
Multiple focus optical pickup system for alternatively reading a multiple number of optical disks
DAEWOO ELECTRONICS CO LTD16 citations74
US5953294ASep 14, 1999
Optical pickup apparatus
DAEWOO ELECTRONICS CO LTD10 citations73
US5787058AJul 28, 1998
Optical pickup apparatus utilizing a polygonal prism
DAEWOO ELECTRONICS CO LTD8 citations73
US5777971AJul 7, 1998
Optical head with a micro fresnel lens integrated on a beam splitter
DAEWOO ELECTRONICS CO LTD14 citations73
US5671206ASep 23, 1997
Optical pickup device
DAEWOO ELECTRONICS CO LTD7 citations73
US5646929AJul 8, 1997
Optical pickup device
DAEWOO ELECTRONICS CO LTD17 citations73
US6097689AAug 1, 2000
Optical pickup system incorporated therein a polarizing film and a pair of 1/4 wavelength plates
DAEWOO ELECTRONICS CO LTD5 citations62
US6021105AFeb 1, 2000
Knife edge method for use in an optical pickup system
DAEWOO ELECTRONICS CO LTD2 citations62
US5939710AAug 17, 1999
Optical pickup system incorporating therein a beam splitter having a phase layer
DAEWOO ELECTRONICS CO LTD2 citations62
US5901132AMay 4, 1999
Pickup head having two laser light sources for separately reading an optical disk with two recording layers
DAEWOO ELECTRONICS CO LTD4 citations62
US5787066AJul 28, 1998
Both-sided optical disc player capable of transferring a both-sided disc up and down about an optical pickup
DAEWOO ELECTRONICS CO LTD2 citations62
US5768244AJun 16, 1998
Optical pickup system having an integrated twin focusing beam splitter
DAEWOO ELECTRONICS CO LTD6 citations62
US5905254AMay 18, 1999
Compact sized optical pickup system
DAEWOO ELECTRONICS CO LTD0 citations41