Processing

Please wait...

Settings

Settings

Goto Application

1. MYPI 20042136 - HIGH-DENSITY RECORDING MEDIUM AND RECORDING AND/OR REPRODUCING DEVICE THEREFOR

Office
Malaysia
Application Number PI 20042136
Application Date 03.06.2004
Publication Number PI 20042136
Publication Date 17.11.2016
Publication Kind A
IPC
G11B 7/0037
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
002Recording, reproducing or erasing systems characterised by the shape of the carrier
0037with discs
G11B 7/24
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
24Record carriers characterised by shape, structure or physical properties, or by the selection of the material 
Applicants LG ELECTRONICS INC.
Inventors KIM, JIN YONG
PARK, KYUNG CHAN
Agents BENJAMIN JOHN THOMPSON*
Priority Data 10-2003-0035523 03.06.2003 KR
1020030040353 20.06.2003 KR
Title
(EN) HIGH-DENSITY RECORDING MEDIUM AND RECORDING AND/OR REPRODUCING DEVICE THEREFOR
Abstract
(EN) DISCLOSED HEREIN ARE A HIGH-DENSITY RECORDING MEDIUM (10), SUCH AS A HIGH-DENSITY OPTICAL DISC (10) AND A RECORDING AND/OR REPRODUCING DEVICE THEREFOR. AT A TRANSITION AREA OF THE HIGH-DENSITY OPTICAL DISC (10) ALLOCATED BETWEEN A CLAMPING AREA AND AN INFORMATION AREA OF THE HIGH-DENSITY OPTICAL DISC (10) IS FORMED A STEP HAVING A PRESCRIBED SLOPE SO THAT THE HIGH-DENSITY OPTCIAL DISC (10) DOES NOT COLLIDE WITH AN OBJECTIVE LENS (OL) OF AN OPTICAL PICKUP (14) PROVIDED IN AN OPTICAL DISC DEVICE ALTHOUGH THE OBJECTIVE LENS (OL) OF THE OPTICAL PICKUP (14) IS UPWARDLY MOVED TOWARD A RECORDING LAYER OF THE HIGH-DENSITY OPTICAL DISC (10) UNTIL IT MOVES TO THE MAXIMUM WORKING DISTANCE WHEN THE HIGH-DENSITY OPTICAL DISC (10), SUCH AS A BLU-RAY DISC, IS IMPROPERLY PLACED ON A TURNTABLE (11) PROVIDED IN THE OPTICAL DISC DEVICE, E.G., WHEN THE HIGH-DENSITY OPTICAL DISC (10) IS PLACED UPSIDE DOWN ON THE TURNTABLE (11). THE THICKNESS OF THE INFORMATION AREA IS SMALLER THAN THAT OF THE CLAMPING AREA BY THE PROVISION OF THE STEP AT THE TRANSITION AREA. CONSEQUENTLY, DAMAGE TO THE HIGH-DENSITY OPTICAL DISC (10) OR THE OBJECTIVE LENS (OL) DUE TO A COLLISION OF THE OBJECTIVE LENS (OL) WITH THE HIGH-DENSITY OPTICAL DISC (10) IS PREVENTED, AND FATAL ERRORS OF A SERVO OPERATION ARE EFFECTIVELY PREVENTED. FURTHERMORE, THE COST OF MATERIALS REQUIRED TO MANUFACTURE THE HIGH-DENSITY OPTICAL DISC (10) IS REDUCED WHILE STABLE CLAMPING FORCE IS MAINTAINED, AND SAFE INSERTION OF THE HIGH-DENSITY OPTICAL DISC (10) INTO A SLOT-TYPE OPTICAL DISC DRIVE IS POSSIBLE. FIGURE 6
Related patent documents
BRPI0410982This application is not viewable in PATENTSCOPE because the national phase entry has not been published yet or the national entry is issued from a country that does not share data with WIPO or there is a formatting issue or an unavailability of the application.
RU2005137533This application is not viewable in PATENTSCOPE because the national phase entry has not been published yet or the national entry is issued from a country that does not share data with WIPO or there is a formatting issue or an unavailability of the application.