CN1453769A

CN1453769A - CD machine and CD readable writer capable of preventing optical head temperature overhigh and its protection method

Info

Publication number: CN1453769A
Application number: CN 02118657
Authority: CN
Inventors: 庄曜隆
Original assignee: Asustek Computer Inc
Current assignee: Pegatron Corp
Priority date: 2002-04-24
Filing date: 2002-04-24
Publication date: 2003-11-05
Anticipated expiration: 2022-04-24
Also published as: CN1290087C

Abstract

The method of preventing overheat of optical head in CD machine during read/write includes providing the optical head with a temperature detector and providing the inside of the CD machine with a temperature controlling assembly. During the operation, the temperature detector detects the work temperature and the temperature controlling assembly compares the work temperature with one set maximum start temperature and reduces the read/write speed in case of work temperature higher than the maximum start temperature. The said method can protect the optical head effectively against damage in excessive high temperature environment.

Description

Prevent CD-ROM device/CD writers and guard method thereof that the optical head temperature is too high

(1) technical field

The present invention is relevant with a kind of optical head (pickup head) of CD-ROM device/CD writers; particularly relevant a kind of can reading in CD-ROM device/CD writers/when burning is moved; detect its optical head temperature and adjust and read/replication rate, with guard method and the associated component that reduces its temperature.

(2) background technology

Along with the fast development of PC, the computer peripheral product is also grown up fast and is maked rapid progress.As computer peripheral products such as Hard Disk Drive, CD-ROM device, scanner, printers has been the instrument of modern offices indispensability, and along with the reduction of product price, the computer peripheral product also has been popularized for family from office.Wherein, CD-ROM device is a storing media very convenient at present and widespread usage, except because CD-RW discsCD-RW has the great storage volume, more more becomes universal because the price of relevant peripheral element constantly reduces.

CD-ROM device/the CD writers of a new generation often has powerful reading/replication rate, and can satisfy the demand that transmits data or storage data quickly.Yet when CD-ROM device/CD writers was carried out work with high power speed, central processing unit that the motor of quick rotation and mechanical organ and frequency are too high and chip for driving all can consume quite high power, cause the temperature fast rise.And the too high operating environment of temperature, can cause CD-ROM device/CD writers is that system is in utmost point unsure state, and reduces the life-span of optical read/write head.

In traditional CD-ROM device technology, be by in CD-ROM device or CD writers, installing fan additional, and when temperature is too high, start fan inside quicken arround the convection current of air, in the hope of reducing the internal work temperature, and reach the purpose of protection correlated parts.Yet increase radiator fan except meeting increases cost, also can increase extra power consumption.Therefore, how not having detecting and control the working temperature of CD-ROM device/CD writers effectively under the condition of radiator fan, with degree of stability that increases machine and the life-span that prolongs optical read/write head, really is the important topic in the current CD-ROM device technology.

(3) summary of the invention

The object of the present invention is to provide a kind of building to place CD-ROM device temperature inside regulation and control assembly and Temperature Detector,, and adjust CD-ROM device read/write speed according to this so that detect the working temperature of this optical read/write head at any time, too high to prevent temperature.

Another object of the present invention is to provide a kind of too high guard method of CD-ROM device working temperature of avoiding, can be at any time the optical read/write head of CD-ROM device be carried out temperature detection, and the work of adjusting CD-ROM device at once speed doubly.

Another purpose of the present invention is to provide under a kind of situation of not using radiator fan, makes CD-ROM device to reduce the mode that thermal source produces, to obtain to reduce the effect of temperature.

To achieve these goals, one aspect of the present invention provide a kind of can automatically testing temperature and adjust and read/CD-ROM device of replication rate, this CD-ROM device has comprised following elements at least: a storer is used to store instruction, parameter and the program that CD-ROM device is operated; One central processing unit can be carried out the instruction, parameter and the program that are stored in the storer, to read/the burning function; One optical head in response to the control of central processing unit, carries out data read/burning action to CD-RW discsCD-RW; One Temperature Detector can carry out temperature detection to optical head according to the control of central processing unit; One temperature adjusting assembly provides central processing unit to carry out and the control Temperature Detector, and when detected temperatures surpassed predetermined maximum start-up temperature, then central processing unit can reduce CD-ROM device and reads/speed of burning, to obtain to reduce the effect of temperature.

In addition, the present invention provides a kind of its optical head of CD-ROM device that prevents reading/the too high method of temperature when burning is moved on the other hand, and the method is the working temperature of detection optical head at first, to obtain first temperature value; Judge then whether first temperature value is higher than predetermined maximum start-up temperature (Tmax); When first temperature value is higher than maximum start-up temperature, reduce reading/replication rate of CD-ROM device; Again the working temperature of detection optical head again is to obtain second temperature value; When second temperature value during, judge that whether second temperature value cuts the value of predetermined temperature range (T1) less than maximum start-up temperature less than maximum start-up temperature; And, when second temperature value is worth less than above-mentioned (Tmax-T1), the reading/replication rate of rising CD-ROM device.

For further specifying purpose of the present invention, design feature and effect, the present invention is described in detail below with reference to accompanying drawing.

(4) description of drawings

Fig. 1 is according to the CD-ROM device structure that can detect and adjust temperature automatically provided by the present invention;

Fig. 2 is a process flow diagram of adjusting the CD-ROM device reading speed according to application of temperature regulation and control assembly provided by the present invention; And

Fig. 3 is a process flow diagram of adjusting the CD writers writing speed according to application of temperature regulation and control assembly provided by the present invention.

(5) embodiment

The invention provides a kind of too high method of its optical head temperature of CD-ROM device/CD writers that prevents, put the temperature adjusting assembly by in CD-ROM device/CD writers storer, building, and at optical head installing Temperature Detector, the working temperature of sustainable detection optical head, and when its temperature is too high, automatically control is servo is that system reduces read/write speed, and working temperature is reduced.

Please refer to Fig. 1, this figure shows according to the CD-ROM device structure 10 that can detect and adjust temperature automatically provided by the present invention.This CD-ROM device structure 10 has comprised central processing unit 12, storer 14, pre-amplifier 16 and servo-drive system 18.Wherein, central processing unit 12 can be in response to the signal of computer system, and 18 pairs of CD-RW discsCD-RW of Control Servo System read or the action of burning.As for CD-ROM device storer 14, then can constitute by elements such as flash memory or ROM (read-only memory), be used for the required instruction of store operation CD-ROM device, parameter and program.Like this, central processing unit 12 can read and carry out these instructions, parameter and program by storer 14, and operational servo 18 carries out the action of access laser disc.In addition, have pre-amplifier (pre-amplifier) 16, except having the signal gain function, and can carry out the conversion of analog/digital in servo-drive system 18 and 12 of central processing units.

Servo-drive system 18 can be according to its function and structure and is divided into driving circuit 20, servo motor 22 and optical read/write head 24.Servo motor 22 comprises the Spindle Motor (spindlemotor) that is used for driving the CD-RW discsCD-RW rotation and is used for controlling the drive motor (sled motor) and voice coil motor (voice coil motor) that optical read/write head 24 moves.Wherein, drive motor portability optical read/write head 24 and move along the planar horizontal of CD-RW discsCD-RW; Voice coil motor then is used to adjust the upright position of optical read/write head 24, so that light focuses on the CD-RW discsCD-RW accurately.

It should be noted that in order to detect the operating temperature of CD-ROM device, in optical read/write head 24, installed a Temperature Detector 26 additional, so that carry out the detection of temperature according to the control signal of central processing unit 12.In addition, in optical disc storage 14, has a temperature adjusting assembly 28.This temperature adjusting assembly 28 is made of relevant procedure code, carries out the test of temperature to provide central processing unit 12 to carry out and control said temperature detecting device 26.When temperature surpassed the maximum start-up temperature of optical read/write head 24, then central processing unit 12 can begin to reduce servo-drive system 18 and reads/speed of burning, produces to reduce thermal source, and then reaches the effect that reduces temperature.SF-WO4 optical head with Sanyo's manufacturing is an example, and the working temperature when reading owing to it is the maximal value that can be set at operating temperature range with the maximum start-up temperature that reads action about between 0 ~ 65 degree Celsius, 65 degree promptly Celsius.In addition, the burning working temperature of this optical head is about between 0 ~ 60 degree Celsius, and the maximum start-up temperature when carrying out the burning action can be set at 60 degree Celsius like this.In addition, what specify is, above-mentioned temperature adjusting assembly 28 is stored in the CD-ROM device storer 14 except mode that can procedure code, also can select it is established in central processing unit 12 or the pre-amplifier 16, and finish by the mode of hardware construction.

In preferred embodiment, said temperature regulation and control assembly 28 comprises whole two parts of function of temperature detecting function and times velocity modulation.Wherein, temperature detecting function can combine with original monitoring facilities (monitorcode) in the storer 14.Typical monitoring facilities can be according to initial setting, and with the interval of tens of approximately microseconds, continues optical read/write head 24, servo motor 22, monitors with driving circuit 20, and the information of being correlated with is sent back central processing unit 12.Like this, temperature detecting function is incorporated in original monitoring facilities, just can when monitoring facilities is each time monitored action, obtains required temperature data via the Temperature Detector 26 that is arranged in optical read/write head 24 simultaneously.When the temperature that detects surpassed above-mentioned maximum start-up temperature, central processing unit 12 just can be according to the whole function of times velocity modulation, and Control Servo System 18 reduces and reads/speed of burning.

In order to make CD-ROM device can in the scope that temperature is allowed, keep the read-write usefulness of high power speed, except above-mentioned reduction read/mechanism of replication rate, in temperature adjusting assembly 28, set a temperature range according to maximum start-up temperature.When the temperature that detects cut the value of this temperature range less than maximum start-up temperature, central processing unit 12 can Control Servo System 18 improves and reads/action of replication rate.In general, this temperature range can be set between 5 ~ 10 ℃.For example, when temperature range is set at 5 ℃ and maximum start-up temperature and is 65 ℃, then as above-mentioned when the temperature that detects surpasses 65 ℃, the speed that temperature adjusting assembly 28 just can allow CD-ROM device read reduces, so that reduce power output and reach the purpose that reduces temperature; Otherwise when the temperature that detects was lower than 60 ℃, then temperature adjusting assembly 28 can allow the reading speed of CD-ROM device rise, so that it keeps preferable work efficiency.

Then, please refer to Fig. 2, this figure has shown the situation of application of temperature regulation and control assembly 28 adjustment CD-ROM device reading speeds.As aforementioned, because the temperature detecting function of temperature adjusting assembly 28, be to depend on monitoring facilities and carry out.Therefore, at first execution interval be 20 microseconds read monitoring facilities (step 30), that is every mistake 20 microseconds are just once monitored action to CD-ROM device.Then, whether the detection delay of inspection detected temperatures function is 0 minor tick (step 32).Between postponing, detection when number of times is 0 time, just can in ensuing monitoring facilities, carry out temperature detection simultaneously.Otherwise, when detection postpones not to be 0 time, then after each monitoring facilities action finishes, detect between the delay and can subtract 1 (step 33) every number of times, become up to detecting between the delay at 0 o'clock every number of times, just can be in the monitoring action of next time carrying out, while detected temperatures value.

After measuring the working temperature of optical head, relatively whether it is higher than maximum start-up temperature (step 34).If it surpasses maximum start-up temperature, then check the whether i.e. reading speed (step 36) set originally of CD-ROM device for this reason of present reading speed.When present reading speed is lower than the speed that CD-ROM device sets originally, judge the temperature that detected whether less than the value (step 38) of maximum start-up temperature (Tmax) deduction temperature range (T1) back, that is whether the inspection detected temperatures is less than (Tmax-T1).If then times speed control system function of temperature adjusting assembly 28 can make the reading speed rising (step 40) of CD-ROM device.In preferred embodiment, when employed optical head has 0 ~ 65 ℃ working temperature, maximum start-up temperature Tmax can be made as 65 ℃, and temperature range T1 is set between 5 ~ 10 ℃.

In general, because CD-ROM device variation of temperature, can't after the reading speed of adjusting optical head, manifest at once, therefore increase too fastly or too much for fear of reading speed, after increasing reading speed at every turn, can postpone a period of time, carry out the detection of temperature again, so that can more accurate grasp under different reading speeds, the temperature variation situation of optical head.Therefore, after increasing the reading speed of CD-ROM device, the detection of detected temperatures function can be postponed to be set at 200 minor ticks (step 42), so that when the 200th time follow-up monitoring of monitoring facilities moved, carry out the detection of temperature next time again.Subsequently, continue to carry out monitoring facilities (step 44).With between the above-mentioned monitoring facilities every being set at 20 microseconds, after time, just can carry out the detection of temperature once again through (20 microsecond) * (200 minor tick).That is, after the time in about 4 seconds, just can carry out temperature detection next time.

As for, in the judgement of above-mentioned steps 34,, judge that then present reading speed is whether still greater than the minimum reading speed (step 46) of CD-ROM device if the working temperature of optical head has surpassed maximum start-up temperature.If then obviously CD-ROM device still has and reduces the doubly space of speed, therefore can be on screen display message informing the user, and send a signal to the relative application software (step 48) of using CD-ROM device in the computer system by central processing unit 12.Then, can will read the low twice (2X) (step 50) of times prompt drop, and the detection of detected temperatures function is postponed to be set at 200 minor ticks (step 52), carry out the time of temperature detection to determine next time.

Otherwise, when the judgement display light disc player of above-mentioned steps 46 has not had the space that reduces speed doubly, then equally on screen display message and transmit signal and just give relative application software (step 54) informing the user at the operational light disc player.Then, stop the fetch program (step 56) of optical head, and close the everything (step 58) of servo-drive system, so that reduce the temperature of optical head.Be lower than the value (step 60) of above-mentioned maximum start-up temperature (Tmax) deduction temperature range (T2) back up to the temperature of subsequent detection, that is be lower than the value of (Tmax-T2), restart the action of servo-drive system again, and the related setting (step 62) before recovering, then carry out reading and convey program (step 64) of data again.As aforementioned, maximum start-up temperature Tmax herein is set at 65 ℃, and temperature range T2 then can be set between 1 ~ 5 ℃, to recover the work of reading of CD-ROM device as early as possible.

Then, please refer to Fig. 3, this figure has shown the situation of using temperature adjusting assembly 28 adjustment CD writers writing speeds of the present invention.Similar to situation about reading, at first execution interval is the burning monitoring facilities (step 70) of 20 microseconds, that is just carries out condition monitoring one time every 20 microseconds.Then, check whether detection postpones is 0 minor tick (step 72).When detection postpones to be 0 minor tick, just in time monitoring facilities, carrying out temperature detection simultaneously at once.Otherwise, when detect postponing not to be 0 time, then after each monitoring facilities action finishes, will detect and subtract 1 (step 73) every number of times between postponing, when detecting delay and be 0 minor tick, just carry out temperature detection.

After measuring the temperature of optical head, relatively whether it is higher than maximum start-up temperature (Tmax) (step 74).If it does not surpass maximum start-up temperature (Tmax), check then whether present replication rate is the original doubly speed value of setting (step 76).With Sanyo's manufacturing SF-WO4 optical head is example, and its temperature of carrying out burning work is about 0 ~ 60 ℃, maximum start-up temperature (Tmax) can be made as 60 ℃ like this.When present replication rate is lower than the doubly speed of setting originally, whether checks the temperature that is detected less than the value (step 78) after maximum start-up temperature (Tmax) the deduction temperature range (T1), that is check that whether detected temperatures is less than (Tmax-T1).If then times speed control system function of temperature adjusting assembly 28 can stop the write activity (step 79) of optical head earlier and adjust replication rate making its rising (step 80).In preferred embodiment, temperature range T1 herein can be set between 5 ~ 10 ℃.

Increase CD writers write times speed after, the preceding terminating point (step 82) that writes that can return again, and link the data (step 84) that are positioned at the memorizer buffer section again restarts to carry out the action (step 86) of burning again.Equally, after increasing the writing speed of CD writers, the detection of detected temperatures function can be postponed be set at 200 minor ticks (step 88), so that after the time delay of (20 microsecond) * (200 minor tick), depend on the detection that monitoring facilities carries out temperature again.Then, continue to carry out monitoring facilities (step 90).

As for, in the judgement of above-mentioned steps 74,, judge that then present replication rate is whether still greater than the minimum writing speed (step 92) of CD writers if the working temperature of optical head has surpassed maximum start-up temperature.If then display message and sends a signal to the relative application software (step 94) of using CD writers informing the user on screen.Then, stop the write activity (step 96) of optical head and adjust replication rate and make its decline (step 98) earlier.Generally speaking, can select the low 2X ~ 6X of burning times prompt drop for example when original times of speed of CD writers is 48, can be downgraded downwards according to the mode of 48X → 40X → 32X → 24X → 20X → 16X → 12X → 10X → 8X → 6X → 4X → 2X → 1X.Downgrade write times speed after, write terminating point (step 100) before can returning again, and link the data (step 102) that are positioned at the memorizer buffer section again, restart to carry out the action (step 104) of burning again.Equally, after downgrading the writing speed of CD writers, the detection of detected temperatures function can be postponed to be set at 200 minor ticks (step 106), and continue the continuous monitoring facilities (step 90) of carrying out.

Otherwise, reduced to minimum burning doubly (for example 1X) during speed when the judgement of above-mentioned steps 92 shows, then equally on screen display message and transmit signal and give the relative application software (step 108) of operating CD writers informing the user.Then, stop the burning program (step 110) of optical head, and close the everything (step 112) of servo-drive system, so that reduce the temperature of optical head.Temperature up to subsequent detection has been lower than the value (step 114) that above-mentioned maximum start-up temperature (Tmax) is deducted temperature range (T2) back, restarts the action of servo-drive system again and recovers related setting (step 116) before.Write terminating point (step 118) before then returning, and link the data (step 120) that are positioned at the memorizer buffer section again, restart to carry out the action (step 122) of burning again.Herein, maximum start-up temperature Tmax is set at 60 ℃, and temperature range T2 then is set between 1 ~ 5 ℃, to recover the work that writes of CD writers as early as possible.

Compared to conventional art, the present invention has considerable advantage:

(1) owing to need on CD-ROM device/CD writers, not install radiator fan among the present invention, can reduce production costs significantly like this, can reduce the power consumption of CD-ROM device/CD writers simultaneously.

(2) because can be among the present invention by the temperature adjusting assembly that is stored in CD-ROM device/CD writers storer, the temperature of detection optical head automatically, and carry out the doubly adjustment of speed of read/write according to this, can avoid optical head in excessive temperature work down like this, and the purpose that reaches increase CD-ROM device/CD writers degree of stability and prolong its life-span.

Certainly, those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claims of the present invention variation, the modification of the above embodiment.

Claims

One kind can automatically testing temperature and adjust and read/CD-ROM device of replication rate, it is characterized in that, comprise at least:

Storer is used to store instruction, parameter and the program that this CD-ROM device is operated;

Central processing unit can be carried out this instruction, parameter and the program that are stored in this storer, to read/burning;

Optical head in response to the control of this central processing unit, carries out data read/burning action to CD-RW discsCD-RW;

Temperature Detector can carry out temperature detection to this optical head according to the control of this central processing unit; And

The temperature adjusting assembly provides this central processing unit to carry out and control this Temperature Detector, and when detected temperatures surpassed predetermined maximum start-up temperature, then this central processing unit can reduce this CD-ROM device and reads/speed of burning, to reduce temperature.
2. CD-ROM device as claimed in claim 1 is characterized in that described maximum start-up temperature is the maximal value of this optical head operating temperature range.
3. CD-ROM device as claimed in claim 1 is characterized in that, described temperature adjusting assembly is that the mode with procedure code is stored in this storer.
4. CD-ROM device as claimed in claim 1 is characterized in that, described temperature adjusting assembly is to build to place in this central processing unit.
5. CD-ROM device as claimed in claim 1 is characterized in that, described temperature adjusting assembly comprises at least:

Temperature detecting function can combine with original monitoring facilities in this storer, and when this monitoring journey is monitored action to this CD-ROM device, detects the temperature of this optical head simultaneously; And

The whole function of times velocity modulation can be adjusted reading/replication rate of this CD-ROM device according to the temperature that is detected.
6. CD-ROM device as claimed in claim 5 is characterized in that, the described times of whole function of velocity modulation can provide this central processing unit to reduce reading/replication rate of this optical head when detected temperatures surpasses this maximum start-up temperature.
7. CD-ROM device as claimed in claim 5, it is characterized in that, described times of whole functional condition one temperature range of velocity modulation when detected temperatures is lower than the value that this maximum start-up temperature cuts this temperature range, then provides this central processing unit to improve reading/the burning temperature of this optical head.
8. CD-ROM device as claimed in claim 5 is characterized in that, described monitoring facilities is the interval with tens of microseconds, continues this CD-ROM device is monitored.
9. CD-ROM device as claimed in claim 1 is characterized in that, described Temperature Detector is to be installed in this optical head.
10. one kind prevents that its optical head of CD-ROM device from reading/the too high method of temperature when burning is moved, it is characterized in that, in this optical head, be equiped with a Temperature Detector, and in this CD-ROM device, have a temperature adjusting assembly, it is characterized in that this method comprises the following steps: at least

Operate this Temperature Detector, detect the working temperature of this optical head;

Use this temperature adjusting assembly to judge whether this working temperature is higher than predetermined maximum start-up temperature; And

When this working temperature was higher than this maximum start-up temperature, this temperature adjusting assembly can reduce reading/replication rate of this CD-ROM device.
11. method as claimed in claim 10 is characterized in that, described maximum start-up temperature is the maximal value of this optical head operating temperature range.
12. method as claimed in claim 10 is characterized in that, described temperature adjusting assembly is that the mode with procedure code is stored in this CD-ROM device storer.
13. method as claimed in claim 10 is characterized in that, the step of this optical head working temperature of described detection is to combine with the original monitoring facilities of this CD-ROM device, and when this monitoring Cheng Jinhang monitoring action, detects the working temperature of this optical head simultaneously.
14. method as claimed in claim 10 is characterized in that, described temperature adjusting assembly is preset a temperature range, when this working temperature is lower than this maximum start-up temperature and cuts the value of this temperature range, then improves reading/the burning temperature of this CD-ROM device.
15. one kind prevents that its optical head of CD-ROM device from reading/the too high method of temperature when burning is moved, and is characterized in that this method comprises the following steps: at least

(1) detects the working temperature of this optical head, to obtain first temperature value;

(2) judge whether this first temperature value is higher than predetermined maximum start-up temperature (Tmax);

(3) when this first temperature value is higher than this maximum start-up temperature, reduce reading/replication rate of this CD-ROM device;

(4) detect the working temperature of this optical head again, to obtain second temperature value;

(5), judge that whether this second temperature value cuts the value of predetermined temperature range (T1) less than this maximum start-up temperature when this second temperature value during less than this maximum start-up temperature; And

(6) when this second temperature value is worth less than described (Tmax-T1), the reading/replication rate of this CD-ROM device that raises.
16. method as claimed in claim 15 is characterized in that, the step of this optical head working temperature of described detection is to combine with the original monitoring facilities of this CD-ROM device, and when this monitoring Cheng Jinhang monitoring action, detects the working temperature of this optical head simultaneously.
17. method as claimed in claim 16 is characterized in that, described monitoring facilities continues to carry out the monitoring action with the interval of tens of microseconds.
18. method as claimed in claim 15 is characterized in that, described maximum start-up temperature is the maximal value of this optical head operating temperature range.
19. method as claimed in claim 15 is characterized in that, described temperature range (T1) is about 5～10 ℃.
20. method as claimed in claim 15 is characterized in that, is carrying out described step (3) before, judges that earlier present the reading of this CD-ROM device/replication rate is whether greater than the minimum permissible velocity of this CD-ROM device.
21. method as claimed in claim 20 is characterized in that, when present the reading of this CD-ROM device/replication rate is the minimum permissible velocity of this CD-ROM device, then carries out the following step:

Stop to read/burning program of optical head;

Again the working temperature that detects this optical head is to obtain the 3rd temperature value;

Judge whether the 3rd temperature value is lower than the value that this maximum start-up temperature cuts predetermined second temperature range (T2); And

When the 3rd temperature value is lower than described (Tmax-T2) value, read again/the burning action.