TW200818150A - Thermal management in optical scanning apparatuses - Google Patents

Abstract

An optical scanning apparatus for reading information from an optical disc, the apparatus comprising communication means for receiving instructions from and sending information to an internal or external host and decision means enabled to decide, when receiving a predetermined instruction for executing an associated action, to send information indicating successful execution of the associated action without executing the associated action. In particular, the predetermined instruction corresponds to a seek instruction, the optical scanning apparatus sending information indicating successful execution of the seek instruction without executing the seek instruction, if the measured temperature exceeds a threshold temperature.

Description

200818150 IX. Description of the Invention: [Technical Field] The present invention relates to an optical scanning device for reading information from an optical disc, the device comprising a communication component for receiving an instruction from an internal or external host Transfer information to an internal or external host. The invention is also used for processing - between an optical scanning device and an internal or external host

The method of communication, the number τ h i A ° 彳 彳 § corresponds to the optical scanning device receiving instructions from the host and/or transmitting information to the host. [Prior Art] The optical disc contains at least a storage M of the magnetic track, which is in the form of a spiral or a plurality of concentric circular patterns in which the == education. The disc can be a read-only type, and the information is recorded as == during manufacturing, and the data can only be read by the user. The optical storage disc is also written in a type where the user can store the information on the disc. For example, 'a typical example of a cymbal is a CD, a DVD, or a high-density disc, such as HD_ first (T-disc. To write information to the disc or to take a negative swipe from the disc, an optical sweep receives and rotates - a disc, and = a rotating member, which is used for the #^^ surface to contain an optical member for using the light beam to describe the magnetic storage. Increasing the number of times on the disc... Take/record on the disc/ Pass:: and with the question of increasing the temperature of reading the internal temperature from the disc, 7:1: Rate 'The cooling efficiency of the housing of the optical scanning device is the second:: The design and rotation speed, angle of the optical sweeping farm Acceleration and this:;: Surprise depends inter alia on the degree of the disc and the duration of such operations. Further known as 123325.doc 200818150 If a laser temperature rises too high, due to a high laser temperature and / or Failure of the optical scanning device due to high motor core temperature of the turntable motor (TTM) may occur. The laser temperature shall remain below the temperature specified by the manufacturer; typically, in the case of a DVD laser and a CD laser This temperature is 75 ° C and is used for reading / In the case of recording high-density blue laser discs (e.g., HD-DVD or Blu-ray (BD) discs) only and the temperature 70 ° C.

PCT Patent Application No. WO 2004/064059 describes an optical scanning device in which the optical disk is rotated at a constant rotational speed for a period of time when the temperature reaches a critical value to provide further cooling. Thus, the cooling of the laser after the write/read operation is improved so that the laser takes a longer temperature to reach a critical temperature. This method has the disadvantage of requiring a cold cycle after performing an operation. Because of &, there is a need to improve the ability of an optical scanning device to handle extended operations, preferably at higher rotational speeds. SUMMARY OF THE INVENTION The sputum system provides an optical scanning skirt having the ability to invent one-team *** I 艮: 艮. The purpose of this child is achieved by the method of claim 1. This is based on the consensus that an internal or external host hangs to optimize the data transmission = order in advance by considering the future user actions of (4). (d), the host can publish if it is intended to optimize future data transmission: Execution of such instructions at the expense of an increase in power consumption is two transmission efficiencies' while the non-execution of such instructions may rumor: rate without causing failure or failure of the optical scanning device. The example of the buccal command is a seek command that corresponds to the positioning read component so that the information stored on a given address can be read or can be requested to be located on the next 123325.d〇c 200818150 a writable address. Jiahua a recording program. The instruction can only increase the performance of the device so that, due to the discovery, the subsequent read instructions are completed faster. Since ^: the learned scanning device itself is enabled to perform a related action, the light = information indicating the successful execution of the related action is not intentional: : = : without reaching the loss, which means that the processing is extended Operation ^ Phase thermal overload - improved ability. Transmitting "successful execution" indicates to the host that the optical scanning device is in normal operation. , in - (4) the specific real-purpose towel, the predetermined instruction is for the message 因此 'so the relevant action corresponds to the m reading member to read the address Take information. It is known that the first one includes the high-speed movement and/or acceleration of the bit component, and the execution-seeking (refers to: consumption is large, power. Therefore, if it is extended for a period of time = The temperature of the device becomes very high. Because the -see command only == transmission, this is not performed. The seek command has the advantage of significantly reducing power consumption. Advantageously, the optical scanning is stepped into the temperature. The measuring member, "for measuring the temperature inside the optical scanning device, if a measured temperature first threshold temperature", enables the decision making component to transmit information indicative of successful execution of the associated action without performing the associated action. If the temperature is low At an extra temperature' the optical scanning device allows for increased power consumption and is at risk of failure. In such cases, when the risk of temperature and thermal failure is low, 'the best for high data transmission rates. The operation of the optical scanning device, and when the temperature exceeds the -th-threshold value, the optical scanning device should be optimized for avoiding the risk of losing the effect of the alarm. The optical scanning device delays the communication of the information about the successful execution of the relevant action for a period of time. A master instruction (for example, a seek command) has to wait for a period of time before the system is successfully executed, thus waiting for a period of time - A response indicating a successful completion. Delayed transmission indicates that the successful execution of the signal allows the optical scanning device to further reduce the temperature. In the case of U, in the example, the optical scanning device is enabled to enter the second threshold temperature. a temperature management mode that includes controlling the rotational speed and/or rotational acceleration of the optical disc. This allows for a further reduction in the risk of operational failure. The present invention also relates to - (d) processing - optical scanning device with an internal or external A method of communication between the hosts, the communication corresponding to the optical scan receiving an instruction from the host and/or transmitting the message to the host. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Figure 1a schematically illustrates a disc ii having a magnetic track 12 and a central aperture ι. The track 12 at the location is configured according to a single-spiral pattern that essentially forms a parallel magnetic shape on the - information layer. The optical disc may contain - or multiple recordable type information layers. For rewritable types, the recordable disc is known. The example is CD_RW or dvd+/_rw, DVD-RAM or BD-RE DVD+/-R or BD-R 〇, and for writing once type, there is CD-R, for example, further related to the physical structure and for 123325.doc The details of the location of the 200818150 DVD+/-RW disc can be found in references ECMA-337 and ECMA-338, respectively. The information is represented on the information layer by optically recording a definable mark (e.g., a crystalline mark or an amorphous mark) in the phase change material along the track. The track 12 on the disc is indicated by a pre-bumped track structure provided during manufacture of the blank disc. For example, a magnetically held structure consists of pre-grooves that enable a read/write head to travel along the track during scanning. The track structure comprises a technology called

The periodicity of the wobble causes the information, modulation, of the periodic change to be used to encode further information (e.g., the physical address used to indicate the location of the stored information element). The location information may include a specific synchronization flag for locating the starting location of such information blocks. The disc 11 is intended to carry user information in a standardized format so that it can be played on a standardized playback device. The recording format includes the method of mapping, recording, and logically mapping to the recording space provided by the track 12 and will be described with reference to Figure lb. The recordable space is typically divided into a lead-in area, a data area for recording user data, and a lead-out area, which can be added to the sequence of the physical magnetic area by the tooth and the numbered unit plus the T address. The lead-in area typically contains a disc description area 14 in which basic disc management information, area 13, and information on how to physically access the data area are stored. For example, the disc management information corresponds to a content disc in the CD system or a formatted disc control block in the DVD system. In addition, at the logical level, the user data in the data area is based on a file system containing file management information (eg, ISO 9660 for CD systems (known as ECMA-19) or iUDF for DVD systems). (Acquired by ECMA 167)) Add 123325.doc 200818150 X Configure such standard management information to be mapped to a predefined location 15 on the disc 11, typically in or immediately after the lead-in area. The user's poor messaging can be further configured in accordance with an application format (e.g., a predefined structure containing files and directories). Figure 2 schematically illustrates an optical scanning device for accessing and/or writing to a video on an optical disk. The optical scanning device has a drive unit 16 for rotating the optical disk 11, a magnetic head 18, for use in the radial direction of the magnetic track

The 4-bit unit 21 of the magnetic head 18 and the control unit (10) are roughly positioned. The magnetic head 18 comprises an optical system of a known type for generating a radiation beam 20' which is directed through an optical element to focus on a radiation spot 19 on the magnetic layer of the information layer of the optical disk. . The radiation beam 20 is produced by a source of radiation (e.g., a + laser diode). The magnetic head further includes (not shown) a focusing actuating effect for the optical axis of the beam of light for moving the beam of light 20 and/or for finely positioning the radiation spot 19 in the center of the track along the radial direction The circulatory actuator on the. The circulatory actuator can include a coil for radially moving an optical component, or can alternatively be configured to change the angle of a reflective element #. In order to read the information 'the common type of detector (for example, a four-quadrant diode) in the magnetic head 18, the radiation reflected by the information layer is used to generate a read signal and its (four) detector signal. For example, it is used to control the tracking error and focus error signals of the tracking and focus actuators. Optionally, the recording member includes a drive unit for rotating the optical disk u, a magnetic head 18, and a position early 7021 for the coarse positioning of the magnetic head 18 in the radial direction of the magnetic actuator and the control unit 17. To record information, the radiation beam 2 is controlled. 123325.doc • 11 - 200818150 to produce optically detectable marks in this recording layer. To this end, the optical scanning device includes a write processing member for processing input information to generate a write signal to drive the magnetic head 18, wherein the write processing member includes an input unit 23, and the data processing member includes a format The device 24 and a modulator 25. The mouth detection unit 17 controls the recording and retrieval of information and can be configured to receive commands from a host 30. The host can be external, such as when the optical scanning device is connected to a host computer, or internal, such as when the optical scanning device forms a larger device (eg, a transponder (stb) or a video player) / logger) when one of the internal units. Communication with the host can occur via a known communication interface such as an IDE or USB. The unit 17 for this purpose may include control circuitry, such as a microprocessor, a private memory, and a control gate, for performing the procedures described below. The control unit 17 is connected to the input unit 23, the formatter 24 and the modulator 25, to the drive unit 16, and to the positioning unit 21 via a control line 22 (e.g., a system bus). The control unit 17 includes control circuitry, such as a micro-processing, a private memory, and a control gate, for performing the procedures and functions of the present invention in accordance with the following description. The control unit 丨7 can also be implemented as a state machine in the logic circuit. The input unit 23 receives and preprocesses user information. For example, when processing audio video information, input unit 23 may include compression components for input signals (e.g., analog audio and/or video, or digital uncompressed audio/video). A suitable compression member can be described for the audio as described in WO 98/16014_People 1$1^16452), and for video as described in the mPEg2 standard. Alternatively, the input signal can be encoded. The output of input unit 23 is 123325.doc -12-200818150 passed to formatter 24 for adding control data and formatting the material according to a recording format, such as by adding an error correction code (ECC) and/or interleaving. For computer applications, the information unit can be directly interfaced to the formatter 24. The formatted data from the output of the mode 24 is passed to a modulation unit that includes, for example, a channel encoder for generating a modulated signal that drives the head 18. Furthermore, the modulation unit 25 comprises a synchronization means for including a synchronization pattern in the modulated signal. The formatted unit presented to the input of modulation unit 25 contains address information and is written to the corresponding addressable location on the disc under the control of control unit 17. The control unit 丨7 is configured to record and position the position information indicating the position of the information recorded. During the recording operation, a mark indicating information is formed on the disc. The indicia can be in any optically readable form, for example in the form of a region having a different reflection coefficient than its environment, obtained when recorded with a material such as a dye, alloy or phase = material; or taken in the direction of magnetization and its ring The form of the different regions of the brother is obtained when recorded with magneto-optical materials. The writing and reading of information for recording on a disc and the available formatting, equalization correction and channel encoding rules are well known in the art, for example, for taking light shots by 'reading signals' - The processing unit is processed by a read processing unit comprising a demodulation transformer 26, a formatter 27 and an output unit 28 for outputting information. The operation of the demodulator 26, the formatter 27, and the output unit ^ is controlled by the controller 17. Therefore, the reading unit (4) includes the driving unit 16, the magnetic head 18, the positioning unit 21, and the processing unit 0 123325.doc • 13· 200818150 The control unit 17 is further adapted by, for example, The firmware is adapted for performing a method of performing a pass between the optical scanning device and the host in accordance with the present invention, as explained with reference to FIG. Figure 3 illustrates, by way of a flow chart, a method of communicating between an optical scanning device and a host in accordance with the present invention. In step 31 (INSTR), the control unit 17 of the optical scanning device receives an instruction from the host unit 30. In step 32 ((:: 11 feet), it is checked whether the instruction corresponds to a predetermined instruction to be simulated rather than executed. In a specific embodiment, such an instruction is maintained in one of the memory of the control unit 13. One list and preferably includes at least the instruction of the seek type. It should be noted that the seek instruction is intended to increase the performance of the optical scanning device.

If the host expects that the operation will correspond to reading the information from the address to the address, then it is preferable to pre-position the magnetic head 18 along the optical disk by the seek command, so that the positioning is performed from the positioning. The address χ read information is directly read from location X. Execution of the seek instruction enables a subsequent read command (if the host 3 is correctly expected) to complete faster. Some applications running on the host can transfer several seek instructions to the optical scan before actual access (i.e., requesting to read or record information). Because the Execution-See command usually includes a -sledge movement and an actuator movement, this is in the optical scanning device! Internal consumption - heat loss. #This feature is combined with foot cooling and / or - higher room temperature 'The optical scanning device! Can be tied, heated beyond - critical temperature. It is often the case that when the temperature of the optical scanning device i exceeds a critical temperature, the optical scanning device transmits an error code to the host 3, which may cause the application running on the host 3 to fail.曰, 123325.doc •14- 200818150 t The received command is not intended to be simulated - type (9) if a read or write command is required), then in step 33 (exec) ^ = 败 - - corresponding action. Optionally, in step 34 (; = stalks will continue to execute the instruction by a suitable result of the execution. "Spoken to - to the host 3. If the received command is to be simulated - type (For example, the search fingering step 33 (EXEC) h performs the command associated with the (4) command. This prevents unnecessary carriage and actuator movement because the optical scanning device 1 performs only the necessary actions (for example, Reading or writing; t) allows the optical scanning device 1 to cool. Optionally, a delay is introduced in step V3: a host expects a predetermined instruction (eg, a sudden seek instruction) before the system is successfully executed. A certain amount of time is required, so "Time Period - indicates a successful completion of the reply. Delayed transmission indicates that the successful execution of the information allows the optical scanning device to step down the temperature. In 36 (REPL), a reply is transmitted to the host 3 〇 thus indicating the successful execution of the finger. After a reply has been transmitted to the host 30 in step 34 or step 36, the optical scanning device ι prepares (4) the host 30 to listen to a new command in step 37 (LSN). Figure 4 through the process The method of temperature management according to the present invention is explained. In step 31 (TEMP), the optical scanning device views the internal temperature inside the device. It should be noted that the known optical scanning device continuously monitors the internal temperature to ensure that it is not damaged. The device is used under the conditions of any of its components' and is known for use in such temperature measurement and monitoring components and is not illustrated in the figure; the internal temperature is generally affected by several parameters, including the outer casing 123325. Doc -15- 200818150 Why, use mode (for example, recording of several discs leads to higher operating temperature) and ambient temperature. After a temperature measurement, compare the measured value with a first critical value in step 42 (??1) Value (Τ1). If the measured temperature is lower than the first threshold, then the driver operates in the normal mode in step 43 (N〇RM), that is, all instructions received from the host are normally executed. The first threshold value is compared between the measured temperature and a second threshold in step τρτα. If the temperature is found to be lower than the second threshold, the optical is in step 45 (SIM_MODE) The device enters the simulation mode. This mode corresponds to the communication with the host 30 according to the method described with reference to Figure 3. Basically, this corresponds to the following steps: when the measured temperature exceeds the first threshold, it is no longer executed. Several types of instructions, such as seek commands, but the simulation is successfully completed. If the temperature is found to be higher than a second threshold temperature in step 44, then the optical scanning device enters a step 46 (TM_M〇DE) Thermal management mode. This mode is preferably described in the PCT Patent Application No. WO 〇 〇〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 It should be noted that the optical scanning device 1 may have a decision member 29 for controlling communication between the optical scanning device and the host as explained with reference to FIG. 3, that is, #transmitting the instruction and receiving the instruction The command _ is the information of the successful execution of the action without performing the action. Additional components 29a may be provided for taking such decisions based on the measured temperature. In an alternative embodiment, the canister decision component 29 and the component can be incorporated into the control 123325.doc -16- 200818150 unit 17 by means of a suitable dynamic body. It should be noted that the specific embodiments are intended to be illustrative and not limiting. Those skilled in the art will be able to devise many alternative embodiments without departing from the scope of the appended claims. Within the scope of the patent application, any reference symbols placed between the orphans should not be considered as limiting claims. The use of the verb "including" and "including" and its singular variations does not exclude the presence of elements or steps other than the elements or steps recited in the claim. Before the component

The article "quote" or "-" or "quotes" does not exclude the existence of a plurality of such elements. The invention may be implemented by hardware comprising several distinct elements and/or by appropriate stylization. Computer programs can be stored/distributed on appropriate media, such as optical storage or in combination with hardware, but can be distributed in other forms, such as via the Internet or a wired or wireless telecommunications system: Several components are listed in the System/Device/Device Requests section: this: Several components can be implemented by - or the same - hardware or software. It is true that the specific methods referenced in mutually different sub-items do not indicate that one of these methods cannot be advantageously used in combination. BRIEF DESCRIPTION OF THE DRAWINGS Features and advantages of the present invention have been understood with reference to the accompanying drawings in which: FIG. 1 (including FIGS. 1a and 1b) schematically illustrates a known optical disc, and FIG. 2 schematically illustrates an optical implementation of the present invention. FIG. 3 is a flowchart illustrating a method for communicating between optical scanning devices according to the present invention by using a flowchart; FIG. 4 is a flowchart illustrating temperature management according to the present invention. Explanation of symbols 〆123325.doc 200818150 1 Optical scanning device 10 Center hole 11 Disc 12 Magnetic control 13 Area 14 Disc description area 15 Pre-defined position 16 Drive unit 17 Control unit 18 Head 19 Lucky light spot 20 Radiation beam 21 Positioning unit 22 Control line 23 Input unit 24 Formatter 25 Modulator 26 Demodulation transformer 27 Deformatter 28 Output unit 29 Decision member 29a Member 30 Host 123325.doc -18-

Claims (1)

200818150 X. The scope of the patent application is for an optical scanning device comprising: reading information from a disc containing four components 'for use in an internal or external 杳#, 、, ^^ 邛 邛The host receives the command and the beta, and the beta device is dedicated to an internal or external host; wherein the device further includes a pre-emptive policy: 其: 'the system enables the receiving to perform the related action--the decision to transmit indicates the success of the related action The information is executed without performing the related action. 2. As claimed in the optical wash bowl τ 1 /, the progress includes a positioning member, eight; 4 master member for reading information from the optical disc, characterized in that the predetermined command corresponds to a + see 'order, the The related action corresponds to positioning the component so that the ant can read the information at a predetermined address. An optical scanning through, such as the item 1 or 2, 槿杜, 甘 m, further comprising a temperature measurement ij ' '/, for measuring the temperature of one of the inside of the singer , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , The information of the successful execution of the s action is as follows: 5. The optical sweeping device of claim 1 enters a temperature management mode when the optical scanning device reaches a temperature limit of 12 325. Doc 200818150 =: The rational mode includes the method of controlling the rotation speed of the optical disc and/or the rotation of the == of the optical scanning device and the internal or external host, and the s receiving command and And/or transmitting the optical scanning device from the host to the host, the method comprising: • receiving the predetermined instruction for performing one of the related actions; • performing the successful operation of the day Capital is not implemented. ^Hai host 7 · If the request item 6 Xi Shi, ^ ^, / /, specifically for the predetermined instruction corresponds to a search for greedy" 'The handle off action corresponds to positioning the optics to enable reading from the - predetermined address The method of claim 6 or claim 7, wherein the method further comprises: - measuring a temperature inside the optical scanning device; and if the measured temperature exceeds a first Temperature limit, 9 = information on the successful execution of the action without performing the correlation: A "method of success 1 or 7" is characterized by delaying the transmission of the information indicating the execution of the relevant power for a period of time. 10. The method of claim 6 or 7, characterized in that the method further comprises: degrees = two: a temperature-to-temperature management mode at a threshold temperature. The nuclear type includes controlling the rotation speed of the optical disc and/or - the rotating electric heating monthly package can take the media, and the computer software is stored thereon, and the execution is performed when the replica is executed - the optical scanning device 2 " ' The party handles communication with an internal or external host. 123325.doc