Unlock instant, AI-driven research and patent intelligence for your innovation.

Method and device for recoding marks in information layer of optical record carrier

A technology of record carrier and record mark, applied in recording information storage, optical recording/reproducing/erasing method, data recording, etc., can solve problems such as low quality, and achieve the effect of good cooling cycle

Inactive Publication Date: 2006-08-02
KONINKLJIJKE PHILIPS NV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, it was observed that the removal of the metal mirror layer from the stack of information layers resulted in a low quality of the marks when known methods were used to record these marks

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and device for recoding marks in information layer of optical record carrier
  • Method and device for recoding marks in information layer of optical record carrier
  • Method and device for recoding marks in information layer of optical record carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] Figure 1a shows a clock signal 10 having a reference clock with a'high' part 11 and a'low' part 12. The combination of a ‘high’ part and a ‘low’ part together constitute a period T of the reference clock. Figure 1b shows a signal 20 to be recorded in the information layer of the record carrier. The "high" part 21 in this signal 20 is recorded in the information layer as a mark having a length corresponding to the duration of the "high" part. The length of the mark is often expressed by the number of corresponding reference clock cycles T. In this example, the length of the mark to be recorded, and therefore the length of the "high" part 21 of the signal 20 is 6T.

[0027]The signal 20 to be recorded is recorded in the information layer, and by irradiating the radiation beam on the information layer, the phase of the information layer can be reversibly changed between the crystalline phase and the amorphous phase. The radiation source is controlled to generate a radiation be...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method and to a recording device for recording marks in a phase-change type record carrier. Generally, a nT marks is recorded by a sequence of (n-2) or (n-1) write pulses (fig 1b). In slow cooling stacks, this results in low quality marks. The invention proposes to increase the cooling period in between the pulses in a sequence of write pulses by applying m write pulses, where m is depended on n / Alpha (Alpha being an integer larger than 1) (fig 1d). In an embodiment, the number of write pulses m is set to the integer value closest to n / Alpha. In an preferred embodiment Alpha is set to 3.

Description

Technical field [0001] The present invention relates to a method for recording a mark with a time length of nT in a record carrier. The record carrier includes an information layer having an information layer that can be in a crystal phase by irradiating the information layer with a pulsed radiation beam. ) And the amorphous phase (amorphous phase) between the reversible change of the phase (phase), each mark is written with a sequence of m pulses, n represents an integer greater than 1, T represents the length of one cycle of the reference clock, m represents An integer greater than or equal to 1 and less than or equal to n. [0002] The present invention also relates to a recording device for recording marks in a record carrier. The record carrier includes an information layer having a phase that can be reversibly changed between a crystalline phase and an amorphous phase. The above method. Background technique [0003] An information layer having a phase that can be reversibly...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/0045G11B7/125G11B7/006
CPCG11B7/0062G11B7/00454G11B7/126G11B7/0045
Inventor J·W·赫尔米格J·M·特尔莫伊伦
Owner KONINKLJIJKE PHILIPS NV