Lg Electronics Inc.

Snu Rdb Foundation

Sung Dae Kim

Yong Cheol Park

Jong In Shin

Sang Wook Park

Kyu Hwa Jeong

Young Woon Kim

Myong Gu Lee

Sang Hu Park

Jang Weon Seo

Seog Gwan Kim

Bong Kyo Jeong

Disclosed is a holder device for an electron microscope, which efficiently collects light emitted when electrons collide with a sample inside the electron microscope and is selectively usable in various electron microscopes since it can be easily attached to and detached from the electron microscopes. The holder device includes a frame; a sample support block configured to be supported on the frame and comprising a sample mounting portion to support an edge of a sample; a mirror unit configured to comprise an upper mirror and a lower mirror respectively arranged above and below the sample and reflect light radiating from the sample, which is mounted to the sample mounting portion and to which an electron beam is emitted, in a predetermined direction; a condensing lens configured to condense light from the mirror unit on a predetermined target; and an optical fiber configured to collect light from the condensing lens.

Holder device for electron microscope

A method and device for managing a recording medium including a non data area having a final defect management area and a data area having a user data area and a spare area. The method includes: (a) recording a defect list onto one or more recording-units of a temporary defect management area allocated to one of the non data area and the spare area, and recording position information of the defect list onto the temporary defect management area, the position information containing one or more defect list pointers which indicate position of the one or more recording-units containing the defect list; and (b) if a recoding-unit is defective, re-recording defect list data onto another recording-unit, and recording updated position information containing a defect list pointer indicating a position of the another recording-unit instead of a defect list pointer indicating a position of the defective recording-unit.

Optical disc of write once type, method, and apparatus for managing defect information on the optical disc

A recording medium of writable once type, and a method and apparatus for managing a defective area on the recording medium are provided. The method includes detecting an existence of a defective area within a data area of the recording medium once data are written onto the data area in a data writing operation; writing data written in the defective area onto a spare area of the data area if the defective area is detected; writing temporary management information pertaining to the defective area, onto a temporary management area on the recording medium; and writing access information for accessing the temporary management information, onto a reserved area on the recording medium.

Write-once type optical disc, and method and apparatus for managing defective areas on write-once type optical disc using TDMA information

A recording medium and a method and apparatus for managing a defective area on the recording medium are provided. The method includes detecting an existence of a defective area within the data area of the recording medium; replacing the defective area with a replacement area in the spare area if the defective area is detected; writing in the spare area defect management information which cumulatively includes defect list information associated with the defective area detected in the step (a) and any defect list information previously written in the recording medium; and writing onto the recording medium positional information of the defect management information.

Write-once type optical disc, and method and apparatus for managing defective areas on write-once type optical disc

Disclosed is a write-once optical disc and method for managing a spare area thereof, the write-once optical disc possibly having a temporary defect management area within one or more spare areas. The method includes the steps of: allocating one or more spare areas including the temporary defect management area at an initial status of the optical disc; and during use of the optical disc, expanding the spare area allocated including the temporary defect management area to set a new spare area. By employing the above optical disc and method, it becomes possible to establish unified regulations on the structures of the spare area and temporary defect management area applicable to the write-once optical disc, so that usage efficiency of the optical disc can be improved.

Write-once optical disc and method for managing spare area thereof

A device and method of reproducing and/or recording data onto a write once recording medium, the recording medium having a data area and a management area, the data area having a spare area. The recording method include: performing a replacement-recording by recording data requested to be recorded in a specified area onto a replacement area in the data area when the specified area is defective or contains data recorded thereon; and recording onto the management area a pair of consecutive entries for managing the replacement-recording when a size of the specified area corresponds to a plurality of consecutive recording-units. One of the pair of consecutive entries includes start address information of the specified area and start address information of the replacement area and another of the pair of consecutive entries includes end address information of the specified area and end address information of the replacement area.

Method of managing overwrite and method of recording management information on an optical disc write once

A write-once optical recording medium, a method for allocating a defect management area of the write-once optical recording medium, and a method for allocating a spare area of the write-once optical recording medium are provided. A method of managing defects on a write-once optical recording medium having at least one recording layer includes the steps of allocating at least one temporary defect management area having a fixed size and at least one temporary defect management area having a variable size to said optical recording medium, respectively, recording defect management information on the at least one temporary defect management area having a fixed size and the at least one temporary defect management area having a variable size; and using the at least one temporary defect management area having a fixed size and the at least one temporary defect management area having a variable size is provided herein.

Write-once optical recording medium and defect management information management method thereof

A recording medium, and a method and apparatus for recording and/or reproducing management information on/from the recording medium are discussed. According to an embodiment, the invention provides an apparatus includes components so that the apparatus finalizes the recording medium when receiving request of an external host or when a temporary defect management area located in at least one of a non-data area and a non-user data area becomes full, where a controller is configured to control the components so that the apparatus records the latest defect list information written in the temporary defect management area onto a final defect management area when finalizing the recording medium.

Write-once optical disc, and method and apparatus for recording management information on write-once optical disc

A method, apparatus and recording medium for managing defects are discussed. According to an embodiment, the method includes allocating at least one spare area to the recording medium, and at least one temporary defect management area to the spare area when a plurality of temporary defect management areas are to be separately provided; recording defect management information on a first temporary defect management area; and recording defect management information on a second temporary defect management area after the first temporary defect management area is full, the second temporary defect management area being allocated to the spare area.

Write-once recording medium and defective area management method and apparatus for write-once recording medium

A method and apparatus for recording or reproducing data are discussed. According to an embodiment, the invention is directed to a method for recording data onto a recording medium having a recording layer, the recording layer including an inner area, a data area and an outer area, the data area having a user data area and a spare area, the user data area consisting of a plurality of clusters, the method comprising steps of: (a) recording a first data block having a temporary defect list for managing a defective area of the data area onto a temporary defect management area allocated in the inner area or the spare area; and (b) recording a second data block having a space bitmap onto the temporary defect management area.

Method and apparatus for recording or reproducing on or from optical medium using SBM information

An optical disc of write once type, a method and an apparatus of managing defect information on the optical disc of write once type, e.g., a BD-WO, are provided with a temporary defect management area (TDMA). The method includes preparing the temporary defect management area (TDMA) in which a temporary defect list (TDFL) is recorded as defect management information for managing a defective area on the optical disc, recording the most recent temporary defect list cumulatively with the previous temporary defect list in the temporary defect management area, and recording position information for indicating a position of the most recent temporary defect list in the temporary defect management area along with the temporary defect list to more effectively manage the temporary defect list.

A write-once type optical disc and a method and apparatus for allocating a spare area on the write-once type optical disc are provided. The method includes allocating a data area on a recording medium of write-once type, and allocating a user data area and at least one spare area within the data area on the recording medium, the at least one spare area having a variable size, wherein a maximum recording capacity of the at least one spare area on the recording medium is less than a maximum recording capacity of at least one variable spare area on a rewritable type optical disc.

Write-once optical disc, and method and apparatus for allocating spare area on write-once optical disc

A recording medium, and a method and apparatus for recording management information on the recording medium are discussed. According to an embodiment, the invention provides a method of recording management information on a recording medium, the recording medium including a temporary defect management area (TDMA) and a final defect management area (DMA), the DMA including a defect list area, the method comprising: recording, in the TDMA, defect list information produced while the recording medium is in use, and recording, in the defect list area of the DMA, the latest defect list information included in the TDMA when the recording medium is to be finalized, wherein the defect list area of the DMA includes a plurality of recording units, and the latest defect list information is recorded on at least one of the recording units of the defect list area.

The data structure on the recording medium includes a temporary defect management area storing a data block. The data block includes a space bit map and a temporary definition structure. The space bit map indicates recordation status of the data area, and the temporary definition structure provides a pointer to the space bit map.

Recording medium having data structure for managing at least a data area of the recording medium and recording and reproducing methods and apparatuses

A method and apparatus for managing a defective area on a optical recording medium, e.g., of writable once type, permits more efficient writing and management of defect list information or temporary defect list information for managing the defective area in a minimum recording size. The method includes writing data in a defective area existing on a high density optical disc, e.g., such as a BD-WO, in a spare area in place of the defective area, producing defect list information for access to the data replacement written in the spare area and writing in a particular area for defect management. The defect entries actually corresponding to the replacement written data, and writing location information of the next available spare area are written and managed as defect list information for management, or the writing location information of a location where replacement writing is possible is written and managed as defect definition structure information.

Growing community of inventors

Gunpo-si, South Korea

Sung Dae Kim