TW200814011A - A method and system for controlling writing powers for a plurality of laser beams - Google Patents

Abstract

A method of controlling writing power for a plurality of laser beams during writing an optical disc, said method comprising the steps of: - detecting (520) a laser beam (C) arriving at an area previously written by another laser beam (D), - checking (530) a writing quality of the area by the laser beam (C) arrived at the area, and -adjusting (540) a writing power of said another laser beam (D) according to the checked writing quality.

Description

200814011 IX. Description of the invention: [Technical field to which the invention pertains] 4 is a method and system for controlling the writing power of a laser beam during writing to a disc, in particular, Method and system for controlling the write power of a plurality of laser beams _ [Prior Art] With the development of the optical disk industry and the increase of the writing speed, it is more important to optimize the write power of a laser. In order to improve the quality of writing. The disc can correspond to a DVD (several digits say ~ stop,

(Blu-ray disc). (Digital...Butter, a CD (disc) or —BD therefore 'requires a pc (optimal power control) processing during writing to a disc' to maintain a good write quality. $Normally, if used—(10)( Constant angular rate) write-disc, the write power will be controlled by a walk (10). The reason for using the walk 0PC is: when using the CAV to write-disc, the linear rate changes constantly. In CAV mode, corresponding to – The linear rate of the -10 track of the disc is less than the linear rate of the magnetic corresponding to the (four) disc. For example, the linear rate of the 'in-most inner track' at full speed in the CAV mode 16X DVD in the CAV mode. Actually it is 66. The walk OPC is implemented after a predefined write rotation, and a walk 0 generation process will include the following steps: writing a predefined length of times, jumping back to the predefined length of the write The point of the data together, the quality of the written length of the predefined length data; the write power of the laser beam according to the inspection. Bayett 118366.doc 200814011 Write quality during the walk 〇 PC , leisurely inflammation ~ adult fruit must jump In order to check the room, it will reduce the extra energy required for the processing of the defect. In particular, the efficiency will be increased, and the use of a plurality of lasers for the jumpback process will be increased as compared to the use of a single laser beam. Write more, when it consumes more. This extra time and extra energy will be [invented] One of the inventions ^Multiple laser beams are provided during the writing of the disc - used to control Improved method and system for nesting power. ,. Controlling the number of writes of a plurality of laser beams during the disc* includes the following steps: % method of intrusion into power - detecting the arrival of an apricot beam , a thunder of the area written by the other - laser beam _! A laser beam arriving at the area checks a write of the area. Quality, and ~" horse entrance ~ according to the inspection official au # rate One", the mouth is negatively adjusted to the other laser beam. The advantage of this is: in the case of the ancient - laser beam -;::: back processing, the use of - laser beam inspection must be Will arrive - previous j two = save time and energy. Again - stay in - wait state No, (4) the field beam until all the laser beams are simultaneously 敕u M to avoid a heavy write when the beam is shifted to a subsequent write position. Because of a laser in the L-special state, the beam is implemented The inspection process will not consume extra time. < 里 will not 118366.doc 200814011 The plurality of laser beams are positioned along the inner track of the optical disk to the outer track, and each laser beam has a -symmetric Ray The beam, the method further comprising a step of: - the other laser beam has a symmetrical laser beam, and the adjusted write power of the other laser beam is replicated to the -symmetric laser beam. : Due to the write power of the symmetrical laser beams, the corresponding symmetric laser beam can be directly copied without the double-check processing and the tuned sound E E (4) processing.

So this method can save more time and energy. The invention also proposes a system comprising a processing unit for carrying out the different steps of the method according to the invention. [Embodiment] For the sake of understanding, the present invention will first be explained by way of an example of a four-beam beam, and then generalized to a plurality of laser beams. Hereinafter, the f-beams have the same relative angular variation at the same time as the optical disc. Hereinafter, the "waiting state" of a laser beam is that a laser beam is not in the writing state. 'Following, the plurality of lasers are selected from the east - stop pools >& Tachimachi does not ship the goods. The track inside the first disk is positioned to the outer magnet. The innermost laser beam specifies: a laser beam positioned at the innermost track of the optical disk compared to other laser beams, and the outermost laser beam specifies: compared to other laser beams, positioning The laser beam of the outermost track of the disc. Figures 1 through 4 illustrate different states of writing to a disc by using four laser beams A, B, c, and D applied to the disc for parallel writing of data. 118366.doc 200814011 During the processing period of °H, the optical disc and the laser beam have a relative rotation, 豕j j sequential and non-overlapping write data, the write position. The slice 1 is implemented again (for example, an error correction code block). In Fig. 1, the laser beam 6 is located inside the segment 2, the laser beam C is located inside the film 4, and the laser beam is located inside the segment 7. The laser beam A is located in the segment 1 and is started to be written. The laser beams B, C, and D are at the beginning of the segment and remain in the -wait state. Therefore, the gate is written to rotate. In the opening, the laser beam D is written after the arrival of the segment 8 and the human beam C is written after reaching the segment 5 ^ field μ ^, and the laser beam is just beginning at the beginning of 3 and starting. Write. The laser beam a is still in writing. The laser beam C reaches the beginning of the segment 8, that is, the area previously written to the user. To avoid writing on the area previously written by the laser beam D, the laser beam/beam is written. C is kept in a wait state. This child 'uses the laser gram C Ε ν Α - ϋ., bundle " takes the first "Bells in the area written by the laser beam D to check the laser beam ^ ^ 写入 写入 写入 , , , , , 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入 写入... the area where the beam C is written. For the field, the laser beam is written by the laser beam C, and the laser beam (4) is held in a waiting state. At this time, the laser beam is used. B reads the data of the area previously written by the laser beam c, in order to check the write σ of the laser beam C, > vocabulary, and then realize the write quality adjustment according to the check The write power of the laser beam C.

Similarly, when the laser beam Α 远 A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A Quality. ^ In Figure 1 to Figure 4, the writing is performed from the inner magnetic to the outer magnetic track. The writing quality of each beam can be checked by the same processing as described above, but the innermost Except for the laser beam A. If the writing is performed from the outer magnetic to the inner magnetic, the excluded laser beam is the outermost laser beam D. According to the optical axis, there is one between the laser beams. Symmetrical relationship (if the number of laser beams is an odd number, then the laser in the middle does not have the divergence and the yaw angle of the two symmetric laser beams), and the angle of deflection is the same. The innermost laser Beam: The write power can be obtained directly by copying the outermost laser beam d (corresponding symmetric laser) to the already-written power. The beam selection is: in order to save more time and energy, there is a symmetry The write power of the Ray-Ray beam can also be reproduced by copying a corresponding symmetric laser beam without the inspection process and the == Obtained by the power input. ^The laser beam obtains a write power by adjusting or copying, and the 4 S reaches the beginning of the segment' to complete the write rotation. Inves: All laser beams (A, B , C, shift to - subsequent write position (not shown) to start - subsequent nesting rotation, and the repeatable front rate adjustment value depends on the write quality of the check and a predefined value of the adjustment is larger If the quality is far from the threshold, the whole value is smaller. If the quality of the write is close to the threshold, then the quality of the right is equal to the threshold, then the adjustment value can be For the case of 118366.doc 200814011, the possibility of adjusting the value to zero is extremely low. Fig. 5 is a description of an embodiment of the present invention, which is used to control the plural number during writing to the disc. A flow chart of a method of writing human power of a beam. The method comprises the following steps: (d): 20) reaching a laser beam (c) of an area previously written by another laser beam (9). The step (520) can be implemented by detecting address information previously written by the other laser beam (D) _ _ Fine inspection (530) of a write quality of the area by the laser beam (C) arriving at the area. The laser beam arriving at the area (c) is used to read back the data in the area to check the read back. The write quality of the data. _ Adjust the write power of the other laser beam (D) according to the write quality of the check. The adjustment value of the write power depends on the write quality of the check and a predefined Write quality threshold. If the written quality of the inspection is far from the threshold, the adjustment value is large. If the quality of the inspection is close to the threshold, the adjustment value is small; If it is equal to the threshold, the adjustment value can be zero. Under normal conditions, the possibility of adjusting the value to zero is extremely low. «The plurality of laser beams are positioned along the optical disk to the outer magnet. Moreover, the outermost laser beam (D) is symmetrical to the innermost laser beam (A). The method further includes the step of: if the writing is performed from the inner magnetic to the outer magnetic holding, then copying the adjusted write power of the outermost laser beam (D) (55 〇) to the innermost Laser beam (A)' or if the writing is performed from the outer track to the inner track, the adjusted write power of the innermost beam (A) is copied (55 〇) to the outermost Laser beam (D). 118366.doc -11 - 200814011 Another option is: in order to save more time and energy, the write power of the mother-laser beam with the symmetrical laser beam can also be used without the inspection process and the adjustment process. #舍』vLt ^ Obtained by a previously adjusted write force rate of a symmetrical laser beam corresponding to helium. The method further includes a step 35: if the other mine, beam (), and a symmetrical laser beam (B, A), copy the 5 weeks of the write power of the other laser beam (CD) ( The symmetry laser beam (7), A) step includes an exchange (10) step for exchanging one by one on the plurality of laser beams to write the optical disk. The X method advancement includes - steps: if each-laser beam is compensated by the adjustment (540) step or copying (55 power laser beam (A, B, c, mn 日士# write power, then the owner) Only the private position (56〇) to a subsequent position for a post-performance write rotation. This shift barrier contains the same day shift of all laser beams (A, B, C, D) of the 1 U s (for example) The movement through the radial direction of the remote disk along the rafter. Figure 6 depicts a system 600 for implementing the method of the invention as described in the following. The system 600 includes : _ - predicated (62 〇) unit, used to measure the arrival of a laser beam (6) that was previously written by another laser beam (D). The debt test (10) component can detect the previous The address information written by the other field beam (D) is used to confirm that the laser beam (c) is the area where Φ reaches the area where the ray is written by the other laser beam (D). - A check (630) unit for the shoe mountain + wrong by the laser beam (C) arriving at the area to check a written eight-mouth bass. The inspection (630) unit controls Π 8366.doc -12- 200814011 to reach the laser beam (c) in the area to read the data in the area to check the write quality of the read back data.

- A faded (640) single turn to adjust the write power of the child's laser beam (D) based on the write quality of the check. The value of this write power adjustment depends on the quality of the writes being checked and a predefined write quality threshold. If the quality of the inspection is far from the threshold, the adjustment value is large. If the quality of the inspection is close to the threshold, the adjustment value is small. If the quality of the inspection is equal to the threshold, then This adjustment value can be zero. Under normal conditions, the possibility of adjusting the value to zero is very low. The plurality of laser beam trains are positioned along the inner magnetic track of the optical disk to the outer magnetic track, and the outermost laser beam (D) is symmetric with respect to the innermost laser beam (A). The system_step includes: - copying ((4)) the unit, if the writing is performed from the inner magnetic to the outer magnetic, the outermost laser rate is copied to the innermost laser beam (4); or The write is from outside =

The inner track is then reproduced to the outermost laser beam (D) by the adjusted write power of the innermost laser beam (4). Alternatively, in order to save more time and energy, the write power of each laser beam having a symmetrical laser beam can also be reproduced by copy-corresponding symmetric laser without the inspection process and the processing Bundle - previously adjusted: obtained with power. The system further includes: a _copy (65 〇) unit, the beam Μ having a symmetrical laser beam (B, A) then the other (B, A). D) The adjusted write power is copied to - the symmetric laser beam. The system also includes a plurality of laser beams for replacing one by one for the received signal (ws) according to Η 8366.doc • 13· 200814011 The exchange (61〇) unit to be written. The system further includes a shift (660) unit, if each _ laser beam - obtained by the adjustment (640) unit or the copy (65 〇) unit _: the factory fine will be all laser beams (A, B, C, D) Simultaneous force rate ^ 1 The main and subsequent positions are used for a post-production rotation. This shift (66 〇) can also be used to output a write apostrophe (NWS) to begin the subsequent write rotation.

This shift implies all of the laser beams (A, B, C, D) - while the displacement (9) is shifted via a radial direction along the disk. For example, the shifting can be performed via it along the radial $displacement-beam-like actuation unit (not shown). The system can be advantageously integrated into a disc-recorder (eg, a computer-disc, stand-alone, etc.). It should be noted that the above-described embodiments are illustrative and not limiting, and are familiar with the present technology. A person can devise many alternative embodiments without departing from the scope of the accompanying patent application (4). In the scope of the patent application, any reference mark placed between the brackets should not be interpreted as limiting the patent application. The term "comprising" does not exclude the presence of the elements or steps listed in the claims. The use of the words "a" or "an" The invention may be practiced using hardware comprising a plurality of different 7G pieces, but may be implemented using a suitably programmed electrical contact. Several components are listed in the patent application scope of the device. Some of these components may be embodied by hardware of one and the same item. The use of the terms first, second and third does not indicate any order. These words will be interpreted as names. 118366.doc -14- 200814011 [Simplified description of the drawings] ', the yoke example and the specific embodiment of the same reference to the accompanying drawings, according to the present invention, the use of the power of the people - ο. ^ ^ In order to clarify the method and system for controlling the write power of a plurality of laser beams, wherein: "He becomes apparent and will add a picture-to-disc difference by way of example - FIG. Figure 5 is a depiction of a write by a specific embodiment -

A method of making a plurality of lightning H _ ..., the method of controlling the write power of the field during the optical disc. Figure 6 depicts a system for implementing the method of the former /, right m 彳 1 m gas. The same component used in the return type [main component symbol class] 4 similar components.

600 61〇 620 630 640 650 660A, B, C, D NWSws System Switching unit Detection unit Inspection unit Adjustment unit Copy unit Shift unit Laser beam Next write signal Write signal 118366.doc -15-

Claims (1)

200814011 X. Patent Application Range: 1 · A method for controlling the write power of a plurality of laser beams during writing to a disc, the method comprising the steps of: ~ detecting (520) reaching a previous laser beam (D) a laser beam (C) of the region written, - checking (53) a write quality of the region by the laser beam (c) reaching the region, and - adjusting (540) a write power of the other laser beam (D) based on the write quality of the check. 2. The method of claim 1, wherein the plurality of laser beams are positioned along an inner track to an outer track of the optical disk, and an outermost laser beam (D) is symmetric to an innermost laser beam (A), the method further comprising a step of: - if the writing is performed from the inner track to the outer track, copying the adjusted write power of the outermost laser beam (D) (55 〇) Up to the innermost laser beam (A)' or if the writing is performed from the outer magnetic to the inner magnetic track, the adjusted write power of the innermost laser beam (A) is copied (550) to The outermost laser beam (d). 3. The method of claim 1, wherein the plurality of laser beam systems are positioned along the inner track of the optical disk to the outer magnetic field, the method further comprising the step of: - if the other laser beam (C, D) having a symmetrical laser beam (B, a), then copying the adjusted write power of the other laser beam (C, D) (5 50) to a symmetric laser beam (] 6, eight) . 4. The method of claim 2 or 3 also includes a step: 118366.doc 200814011 - if each-ray burst is obtained by the adjustment (540) step or the copy (55〇) step - write human power' The plurality of laser beams are then shifted (560) to a subsequent position for subsequent write rotation. 5. The method of claim 2, 2 or 3, further comprising the step of: - swapping (51) on the plurality of laser beams to write the disc. 6. A system for controlling the write power of a plurality of laser beams during writing to a disc, the system comprising: - a detection (620) unit for detecting arrival of a previous laser by another a laser beam (c) in the region to which the beam (D) is written, a check (63 〇) unit for checking a write quality of the region by the laser beam (C) reaching the region And a 1 (640) unit for adjusting a write power of the other laser beam (D) according to the write quality of the check. 7. The system of claim 6, wherein the plurality of laser beams are magnetized to the outer track along the optical disk, and an outermost laser beam (D) is symmetric to an innermost laser. Beam (A), the system further comprising: • a copy (65〇) unit for performing the outermost laser beam (D) if the writing is performed from the inner magnetic to the outer magnetic track Adjusting the write power replica to the innermost laser beam (A); or if the write is performed from the outer magnet to the inner track, the adjusted write power of the innermost laser beam (A) Copy to the outermost laser beam (D). 8. The system of claim 6, wherein the plurality of laser beams are positioned along the inner track to the outer track of the optical disk, the system further comprising: 118366.doc 200814011: 襄 (65〇) a unit for if the other-laser beam (C, D) has a ▲-to-private beam (B, A), the other-beam (C, D) 9 is written to the human power Copy to - symmetrical laser beam (B, A). "Unless 7 or 8 system, the advance step includes: DD private position (66 〇) early, if each laser beam is obtained by the adjustment (640) early or the copy (650) unit Into the power, then 4 multiple lightning shots _ private position to a subsequent position for a subsequent write 10. For example, the system-one exchange (610) unit of claim 6, 7 or 8 is replaced by the parent to write the disc' further comprising: for one-by-one on the plurality of laser beams. , 7 9 or 10 system recorder. 118366.doc