CN1612248A - Method for detecting optical disk and its optical disk driver - Google Patents
Method for detecting optical disk and its optical disk driver Download PDFInfo
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- CN1612248A CN1612248A CN 200310102664 CN200310102664A CN1612248A CN 1612248 A CN1612248 A CN 1612248A CN 200310102664 CN200310102664 CN 200310102664 CN 200310102664 A CN200310102664 A CN 200310102664A CN 1612248 A CN1612248 A CN 1612248A
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Abstract
The invention is a CD detecting method used for CD-ROM, where the CD-ROM includes a spindle drive motor and optical read head, and the method includes: moving the optical read head to a first position; emitting a first laser by the optical read head; by the reflection of the first layer, judging if the CD-ROM carries with the CD to be read: if not, end; moving the optical read head to a second position; emitting a second laser by the optical read head; and by the reflection of the second laser, judging the size of the read CD.
Description
Technical field
The present invention relates to a kind of method and CD-ROM drive thereof that detects discs, particularly relate to a kind of optical read head (Optical Pickup Unit that utilizes; OPU) whether emitted laser has reflection to judge detection discs method and the CD-ROM drive thereof that has or not discs and discs size.
Background technology
Flourish along with the Internet and multimedia industry, replaced cartridge in the past in order to the discs that stores video-audio data, has bigger data storing capacity, and can preserve audio-visual quality better also more of a specified duration, therefore, become the main flow of market Storage Media now, for example: CD-ROM, DVD-ROM and CD-RW discs etc.
General common discs has two kinds of sizes, is respectively the discs of diameter 12CM and diameter 8CM.The discs of diameter 12CM is traditional discs size, can be in order to storing general video-audio data and MP3 data, and the discs of diameter 8CM is more novel discs, mainly is to be used for storing the MP3 data.Aspect mechanism, CD-ROM drive is to be used for the device of access discs data, for example: the CD-ROM drive of personal computer or notebook computer, can be in order to read the discs data, VCD and DVD player are in order to play the discs program, and CD writers then can write down and read the data of discs.
Please refer to Fig. 1, it shows the structural representation of known CD-ROM drive.CD-ROM drive 100 has pallet 110, in order to carrying disc sheet 120, for example: and 12CM discs 120a and 8CM discs 120b, and can withdraw from or put into CD-ROM drive 100 along the direction of arrow among the figure; Spindle Motor (Spindle Motor) 130 is fixed discs 120 after inserting pallet 110 in discs 120, and drives discs 120 rotations.In addition, CD-ROM drive 100 also comprises optical read head 140, in order to reading the stored data of discs 120, and is converted to electrical signal and is sent to circuit board 150.
General CD-ROM drive 100 through be enabled in begin to read discs 120 before, can judge whether be loaded with discs 120 in the pallet 110 earlier, avoiding under the situation that does not have carrying disc sheet 120, read head 140 can be read wrong signal and the operation that produces mistake.When judging that CD-ROM drive 100 is loaded with discs 120, can distinguish it is 12CM discs 120a or 8CM discs 120b again, with the scope that determines that read head 140 moves, and set corresponding parameters.The method of traditional detection discs is to send a control signal by circuit board 150,130 rotations of drive shaft motor, utilize inertia (Inertia) difference of discs 120 itself, size heals big discs 120 more heavily, relatively, it is also slower that Spindle Motor 130 drives the speed that discs 120 are rotated.
Provide Spindle Motor 130 1 fixed ends taken about the point of fixation, in certain rotational time, detect the rotating speed that Spindle Motor 130 is arrived, or measurement Spindle Motor 130 rotates to the required time of certain speed.When rotating speed surpasses first speed, represent and do not have carrying disc sheet 120 in the CD-ROM drive 100, when rotating speed is lower than second speed (second speed is less than first speed), represent carrying 12CM discs 120a in the CD-ROM drive 100, and when rotating speed is between first speed and second speed, then represent carrying 8CM discs 120b in the CD-ROM drive 100.Perhaps, be loaded with 12CM discs 120a when the time above very first time value representation, be loaded with 8CM discs 120b when the time between the very first time and second time representation, do not have carrying disc sheet 120 and ought be lower than second time (second time is less than the very first time) expression CD-ROM drive 100 time.
Yet judge to have or not discs 120 and be 12CM discs 120a or the mode of 8CM discs 120b to have following several shortcoming according to tradition:
1. the mechanical system of utilizing Spindle Motor to rotate to detect discs need spend a certain amount of rotation time, could correctly detect the discs size, is difficult to further shorten detection time.
2. Spindle Motor must clamp discs and could be exactly detects the size that has that it's too late of discs by the rotating speed of Spindle Motor or rotation time, if because the deviation on making makes Spindle Motor can't fix discs, might deposit under the discs situation erroneous judgement for not having, or deposit 12CM discs erroneous judgement and be the 8CM discs, or person 8CM discs is when doing thicklyer, rotate more on the contrary erroneous judgement all cause testing result unreliable for the 12CM discs.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of method and CD-ROM drive thereof that detects discs, utilize the reflection of read head emitted laser to judge whether CD-ROM drive is loaded with discs, and judgement is loaded with the discs of 12CM or 8CM, spended time is shorter, and can obtain testing result more accurately, cooperate traditional detection method, can judge also whether Spindle Motor fixes discs.
According to purpose of the present invention, propose a kind of CD-ROM drive and comprise: disc bearing district, Spindle Motor, optical read head, and judgment means.The disc bearing district is read discs in order to carrying, and is read discs and can be the first size discs and the second size discs, and wherein the second size discs is greater than the first size discs.Spindle Motor is read discs in order to rotation.Optical read head, in order to reading the discs data, and judgment means is electrically connected on optical read head, is read the discs size in order to judge whether the disc bearing district carries to be read discs and to distinguish.Optical read head is launched first laser in primary importance, judge according to the reflection of first laser whether the disc bearing district carries and be read discs, and after definite disc bearing area carrier discs, optical read head continues to launch second laser in the second place, distinguishes according to the reflection of second laser to be read the discs size.Primary importance and Spindle Motor in the radius of first size CD, and the second place and Spindle Motor apart the radius of first size CD between the radius of the second size CD.Utilize the reflection of laser to detect the discs state, can obtain testing result more accurately fast.
According to purpose of the present invention, a kind of method that detects discs is proposed, be used for CD-ROM drive, be read discs and can be the first size discs and the second size discs, the second size discs is greater than the first size discs, CD-ROM drive comprises optical read head and Spindle Motor, and this method comprises the following steps: optical read head is moved to primary importance; Launch first laser by optical read head;
By the reflection of first laser, judge whether CD-ROM drive is loaded with to be read discs, if CD-ROM drive is not loaded with and is read discs, method ends; Optical read head is moved to the second place; Launch second laser by optical read head; And judge by the reflection of second laser and to be read the discs size.
Primary importance and Spindle Motor are in the radius of first size CD, and the second place and Spindle Motor at a distance of the radius of first size CD between the radius of the second size CD, when the reflection of first laser that optical read head receives surpassed a predetermined value, judgment means judged that the disc bearing area carrier is read discs.When the reflection of second laser that optical read head receives is lower than predetermined value, judgment means judges that being read discs is the first size discs, and optical read head is when receiving the reflection of second laser and surpassing predetermined value, and judgment means judges that then being read discs carries the second size discs.The first size discs is the 8CM discs, and the second size discs is the 12CM discs.Utilize laser detection to be read discs and can obtain judged result more accurately.
According to purpose of the present invention, a kind of method that detects discs is proposed, be used for CD-ROM drive, be read discs and can be the first size discs and the second size discs, the second size discs is greater than the first size discs, and CD-ROM drive comprises optical read head, in order to read the data of discs, and Spindle Motor, in order to the fixed light disc and drive discs rotation, this method comprises the following steps: optical read head is moved to primary importance; Launch first laser by optical read head; By the reflection of first laser, judge whether CD-ROM drive is loaded with to be read discs, if CD-ROM drive is not loaded with and is read discs, method ends; Optical read head is moved to the second place; Launch second laser by optical read head; By the reflection of second laser, judge to be read the discs size; Start Spindle Motor set time of rotation; And rotate the rotating speed of this set time according to Spindle Motor, judge whether be read discs is fixed on the Spindle Motor.Wherein can also start Spindle Motor and turn to a fixed rotating speed, judge according to its required time whether be read discs is fixed on the Spindle Motor again.
When judgement is read discs is the first size discs, and rotating speed judges that being read discs is not fixed on the Spindle Motor during greater than first speed.When judgement is read discs is the second size discs, and rotating speed judges that being read discs is not fixed on the Spindle Motor during greater than second speed, and wherein second speed is less than first speed.The present invention is cooperated traditional detection discs technology, not only can judge to have or not to be read discs and to be read the discs size, and can determine to be read discs and whether be fixed on the Spindle Motor.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and be described with reference to the accompanying drawings as follows.
Description of drawings
Fig. 1 shows the structural representation of known CD-ROM drive;
Fig. 2 A shows according to a preferred embodiment of the present invention CD-ROM structure top view;
Fig. 2 B shows the side-looking structural representation of optical read head detection discs among Fig. 2 A; And
Fig. 3 shows the process flow diagram that detects the discs method according to preferred embodiment of the present invention.
The reference numerals explanation
100,200: CD-ROM drive
110,210: pallet
120: discs
120a, 220a:12CM discs
120b, 220b:8CM discs
130,230: Spindle Motor
140,250: optical read head
150: circuit board
220: be read discs
232: clamping sheet mechanism
252: light emitting module
254: receiver module
260: slide rail
270: judgment means
Embodiment
Characteristics of the present invention are to utilize the optical read head in the CD-ROM drive that discs is launched laser, detect by the reflection of laser and to have or not discs and be 12CM discs or 8CM discs, can finish detection faster, and obtain testing result more accurately, improve the efficient and the accuracy that detect discs when CD-ROM drive starts.
Please also refer to Fig. 2 A and Fig. 2 B, it shows respectively according to a preferred embodiment of the present invention CD-ROM structure top view and side-looking structural representation.CD-ROM drive 200 mainly comprises pallet 210, Spindle Motor 230, optical read head 250 and judgment means 270.Pallet 210 is read discs 220 in order to carrying, for example: 12CM discs 220a and 8CM discs 220b.Spindle Motor 230 is read discs 220 rotation in order to drive, and Spindle Motor 230 comprises a clamping sheet mechanism (Clamper) 232, is read discs 220 in order to fix.Optical read head 250 moves along slide rail 260, is read recorded data on the discs 220 in order to read.Optical read head 250 comprises light emitting module 252, and receiver module 254, for example is an optical diode (Photo Diode).Judgment means 270 electrically connects the receiver module 252 of optical read heads 250, and according to the reflection of laser, judges whether CD-ROM drive 200 is loaded with the size that is read discs 220 and is read discs 220.When CD-ROM drive 200 starts, generally can be to the operation of optical read head 250 advanced line focusings and lock rail, focal length with calibration of laser source (not being shown among the figure), and read head 250 is locked in reference position on the slide rail 260, the position of normally the most close Spindle Motor 230, then can detect CD-ROM drive 200 whether be loaded be read discs 220 and be loaded with that a kind of size be read discs 220.
Shown in Fig. 2 B, characteristics of the present invention are to utilize the reflection of optical read head 250 emission laser L to detect to have or not and are read discs 220, and the size that is read discs 220.Optical read head 250 is prior to laser of reference position (for example being apart from Spindle Motor 230 about 2.5CM positions) emission.Be read discs 220 emission laser L by 252 pairs of light emitting modules, and receive the reflected light L ' of laser by receiver module 254.(or reflection) judged whether to be read discs 220 existence to judgment means 270 according to the reflection signal that receives.If the reflection that receives laser is higher than a predetermined value (representative has reflection), judgment means 270 judges that CD-ROM drives 200 are loaded with and is read discs 220, otherwise then CD-ROM drive 200 is not loaded with and is read discs 220.
As mentioned above, when define be read discs 220 and exist after, drive optical read head 250 again and move to apart from the distance between the about 4CM to 6CM in Spindle Motor 230 centers along slide rail 260 and launch laser again one time, as shown in Fig. 2 B.In like manner as can be known, surpass this predetermined value (representative has reflection) if light emitting module 254 receives the reflection of laser, judgment means 270 judges that being read discs 220 is the 12CM discs; Be lower than this predetermined value (representative no reflection events) if receive the reflection of laser, then judgment means 270 judges that being read discs 220 is the 8CM discs.Because the laser that launched by the position of light emitting module 254 this moment only can be reflected by the discs 220a of 12CM size, 8CM discs 220b since diameter too weak point can't reflector laser, the discs 220 that is read that can pick out CD-ROM drive 200 in view of the above and carried is 12CM discs 220a or 8CM discs 220b.
Though the present invention is that example explains with the CD-ROM drive 200 with pallet 210, yet not in order to restriction the present invention, any have can be in order to the CD-ROM drive 200 in the disc bearing district of carrying disc sheet 220, for example is the cover-lifting type CD-ROM drive or inhales dish formula CD-ROM drive, neither disengaging technical scope of the present invention.
Please refer to Fig. 3, it shows the process flow diagram that detects the discs method according to preferred embodiment of the present invention.At first, in step 300, start CD-ROM drive 200, can lock the rail operation this moment to optical read head 230, and optical read head 230 is set in reference position, then, in step 310, by optical read head 230 emissions first laser, and by receiver module 254 its reflected light of reception, in step 320, judgment means 270 is judged according to the reflection of receiver module 254 first laser of receiving whether CD-ROM drive 200 is loaded with and is read discs 220.When the reflection of first laser is lower than above-mentioned predetermined value, represent no reflection events, judge promptly that CD-ROM drive 200 is not loaded with to be read discs 220 that flow process finishes.If the reflection of first laser surpasses this predetermined value, representative has reflection, judges promptly that CD-ROM drive 200 is loaded with to be read discs 220, proceeds step 330.
In step 330, that optical read head 250 fast moving are extremely above-mentioned apart from distance between the Spindle Motor 230 center 4CM to 6CM.Generally be that the motor (not being shown among the figure) that drives read head rotates, and drive optical read head 230 move along slide rail 260.Control the distance that optical read head 250 moves by motor rotary speed and rotation time.Then, in step 340, by optical read head 230 emissions second laser, and by receiver module 254 its reflected light of reception.In step 350, judgment means 270 is judged the size that is read discs 220 according to the reflection of second laser.When the reflection of second laser is lower than predetermined value, judgment means 270 judges that being read discs 220 is 8CM discs 220b, and when the reflection of second laser surpassed this predetermined value, judgment means 270 judged that being read discs 220 is 12CM discs 220a and process ends.
As mentioned above, detection discs method of the present invention, they be at the first laser of emission of reference position, and reference position can be in distance Spindle Motor 230 center 4CM, and emitted laser can be fixed in any distance that is read discs 220 reflections of Spindle Motor 230.Next emission is that read head 250 positions are moved to 4CM to the 6CM position apart from Spindle Motor 230 place during laser for the second time, is read discs 220 in order to judgement and is 12CM discs 220a or 8CM discs 220b.Yet for the rectangle disc that for example is 9CM, because therefore the submarginal space of 9CM discs record data not can classify as 8CM discs 220b.With read head 250 positions move near but be no more than apart from the place of Spindle Motor 230 6CM of place, 9CM discs emission laser is not had reflected light, CD-ROM drive 200 will judge that the discs 220 that is read of being carried is 8CM discs 220b this moment.
In addition, utilize detection discs method of the present invention, cooperate traditional detection mode again, can judge whether be read discs 220 is fixed on the Spindle Motor 230.Utilize the above-mentioned method of the present invention earlier, judge that CD-ROM drive 220 is loaded with to be read discs 220, and be read discs 220 and be 8CM discs 220b or 12CM discs 220a.The person of connecing utilizes traditional detection method, starts 230 set times of rotation of Spindle Motor and measures its rotating speed.As mentioned above, when rotating speed surpasses first speed, represent not have to be read discs 220, when rotating speed between first speed and second speed, expression is read discs 220 and is 8CM discs 220b, and when rotating speed was lower than second speed, expression was read discs 220 and is 12CM discs 220a.
Be loaded with under the situation that is read discs 220 at CD-ROM drive 220, and traditional detection mode is measured not have and is read discs 220 (when the rotating speed of Spindle Motor 230 surpasses first speed), method perhaps of the present invention detects and is read discs 220 is 12CM discs 220a, and traditional mode is measured into 8CM discs 220b (rotating speed of Spindle Motor 230 surpasses second speed), representing then that Spindle Motor 230 is not fixed is read discs 220, and can repair or change Spindle Motor 230 according to this.Certainly, above-mentioned cooperation traditional detection is read the method for discs 220, can also start Spindle Motor 230 and turn to a fixing rotating speed, measures its required time again, judges according to this whether be read discs 220 is fixed on the Spindle Motor 230.
According to above-mentioned preferred embodiment, the method that the present invention detects discs has following advantage:
1. utilize the no reflection events that has of the laser first time to judge whether CD-ROM drive is loaded with discs, it is very short that it detects required time.After definite CD-ROM drive is loaded with discs, fast moving optical read head, emission laser and have no reflection events to judge the discs size for the second time again according to it.Therefore, the present invention is more faster than known mode by Spindle Motor rotation detection discs.
According to the first time laser no reflection events arranged, can judge whether CD-ROM drive is loaded with discs.After determining to be loaded with discs, again according to the second time laser no reflection events arranged, the decidable discs is 12CM discs or 8CM discs.Utilize this simple geometry notion to judge, than the inertia effect that tradition utilizes Spindle Motor to rotate, more intuition is reliable, can not occur above-mentionedly not producing wrongheaded problem because Spindle Motor does not fix discs.
3. if, not only can detect the size that has or not discs and discs, also can detect Spindle Motor and whether fix discs, so that repair or change with the traditional mode of detection discs method collocation of the present invention.
In sum; though the present invention discloses as above with a preferred embodiment; right its is not in order to limit the present invention; those skilled in the art; under the premise without departing from the spirit and scope of the present invention; can be used for a variety of modifications and variations, so protection scope of the present invention is looked accompanying Claim and is as the criterion.
Claims (27)
1. a CD-ROM drive can read a first size discs or one second size discs, and wherein this second size discs is greater than this first size discs, and this CD-ROM drive comprises:
One disc bearing district can carry one and be read discs;
One Spindle Motor, rotatable this is read discs; One optical read head, when this optical read head during in a primary importance, this optical read head can be launched one first laser to this disc bearing district, and the reflection of reading this first laser; And
One judgment means is electrically connected on this optical read head, and according to the reflection of this first laser, judges that this is read discs and whether is placed in this disc bearing district;
Wherein, this primary importance of this optical read head be with this Spindle Motor in the radius of this first size CD.
2. CD-ROM drive as claimed in claim 1, wherein this disc bearing district is a pallet.
3. CD-ROM drive as claimed in claim 1, wherein this optical read head is launched one second laser in a second place, distinguishes this discs size according to the reflection of this second laser.
4. CD-ROM drive as claimed in claim 3, wherein this second place of this optical read head be and this Spindle Motor at a distance of the radius of this first size CD between the radius of this second size CD.
5. CD-ROM drive as claimed in claim 1, when wherein the reflection of this first laser of this optical read head reception surpassed a predetermined value, this judgment means judged that this is read compact disk sheet placing in this disc bearing district.
6. CD-ROM drive as claimed in claim 5, when wherein the reflection of this second laser of this optical read head reception is lower than this predetermined value, this judgment means judges that this is read discs is this first size discs, and the reflection that receives this second laser when this optical read head is when surpassing this predetermined value, and this judgment means judges that then this is read discs is this second size discs.
7. CD-ROM drive as claimed in claim 1, wherein this first size discs is the 8CM discs, and this second size discs is the 12CM discs.
8. method that detects discs, be used for a CD-ROM drive, one of use is read discs and can be a first size discs and one second size discs, this second size discs is greater than this first size discs, this CD-ROM drive comprises an optical read head and a Spindle Motor, and this method comprises the following steps:
(a) this optical read head is moved to a primary importance;
(b) launch one first laser by this optical read head;
(c) by the reflection of this first laser, judge whether this CD-ROM drive is loaded with this and is read discs, if this CD-ROM drive is not loaded with this and is read discs, finish this method;
(d) this optical read head is moved to a second place;
(e) launch one second laser by this optical read head; And
(f), judge that this is read the discs size by the reflection of this second laser.
9. method as claimed in claim 8, wherein this primary importance be with this Spindle Motor in the radius of this first size CD.
10. method as claimed in claim 9, wherein this second place be and this Spindle Motor at a distance of the radius of this first size CD between the radius of this second size CD.
11. method as claimed in claim 8 wherein when the reflection of this first laser is lower than a predetermined value, judges that this CD-ROM drive is not loaded with this and is read discs.
12. method as claimed in claim 11, wherein when the reflection of this second laser is lower than this predetermined value, judge that this is read discs is this first size discs, and when the reflection of this second laser surpasses this predetermined value, judge that this is read discs is this second size discs.
13. method as claimed in claim 8, wherein this first size discs is the 8CM discs, and this second size discs is the 12CM discs.
14. method that detects discs, be used for a CD-ROM drive, one of use is read discs and can be a first size discs and one second size discs, this second size discs is greater than this first size discs, this CD-ROM drive comprises an optical read head, in order to reading the data that this is read discs, and a Spindle Motor, be read discs and drive this and be read discs rotation in order to fix this, this method comprises the following steps:
(a) this optical read head is moved to a primary importance;
(b) launch one first laser by this optical read head;
(c) by the reflection of this first laser, judge whether this CD-ROM drive is loaded with this and is read discs, if this CD-ROM drive is not loaded with this and is read discs, finish this method;
(d) this optical read head is moved to a second place;
(e) launch one second laser by this optical read head;
(f), judge that this is read the discs size by the reflection of this second laser;
(g) start this Spindle Motor and rotate a set time; And
(h) rotate the rotating speed of this set time according to this Spindle Motor, judge that this is read discs and whether is fixed on this Spindle Motor.
15. method as claimed in claim 14, wherein this primary importance be with this Spindle Motor in the radius of this first size CD, and this second place is and this Spindle Motor at a distance of the radius of this first size CD between the radius of this second size CD.
16. method as claimed in claim 14, wherein when the reflection of this first laser is lower than a predetermined value, judge that this CD-ROM drive is not loaded with this and is read discs, when the reflection of this second laser is lower than this predetermined value, judge that this is read discs is this first size discs, and when the reflection of this second laser surpasses this predetermined value, judge that this is read discs is this second size discs.
17. method as claimed in claim 14 is this first size discs when judging that this is read discs wherein, and this rotating speed judges that this is read discs and is not fixed on this Spindle Motor during greater than one first speed.
18. method as claimed in claim 14, be this second size discs wherein when judging that this is read discs, and this rotating speed judges that this is read discs and is not fixed on this Spindle Motor during greater than a second speed, and wherein this second speed is less than this first speed.
19. method as claimed in claim 14, wherein this Spindle Motor comprises a clamping sheet mechanism, in order to fix this discs.
20. method that detects discs, be used for a CD-ROM drive, one of use is read discs and can be a first size discs and one second size discs, this CD-ROM drive comprises an optical read head, in order to read the data that this is read discs, and a Spindle Motor, being read discs and driving this and be read the discs rotation in order to fix this, this method comprises the following steps:
(a) this optical read head is moved to a primary importance;
(b) launch one first laser by this optical read head;
(c) by the reflection of this first laser, judge whether this CD-ROM drive is loaded with this and is read discs, if this CD-ROM drive is not loaded with this and is read discs, finish this method;
(d) this optical read head is moved to a second place;
(e) launch one second laser by this optical read head;
(f), judge that this is read the discs size by the reflection of this second laser;
(g) start this Spindle Motor and rotate to a fixed rotating speed; And
(h) rotate to this fixed rotating speed required time according to this Spindle Motor, judge that this is read discs and whether is fixed on this Spindle Motor.
21. method as claimed in claim 20, wherein this primary importance be with this Spindle Motor in the radius of this first size CD.
22. method as claimed in claim 21, wherein this second place be and this Spindle Motor at a distance of the radius of this first size CD between the radius of this second size CD.
23. method that detects discs, be used for a CD-ROM drive, one of use is read discs and can be a first size discs and one second size discs, and this second size discs is greater than this first size discs, this CD-ROM drive comprises an optical read head, and this method comprises the following steps:
(a) this optical read head is moved to a primary importance;
(b) launch a laser by this optical read head; And
(c) this is read the discs size by the reflection identification of this laser.
24. method as claimed in claim 23, wherein this CD-ROM drive comprises a Spindle Motor, and this primary importance is and this Spindle Motor at a distance of the radius of this first size CD between the radius of this second size CD.
25. method as claimed in claim 23, wherein when the reflection of this laser is lower than a predetermined value, judge that this is read discs is this first size discs, and when the reflection of this laser surpasses this predetermined value, judge that this is read discs is this second size discs.
26. a CD-ROM drive detection one is read the method for discs, this CD-ROM drive can read a first size discs or one second size discs, wherein this second size discs is greater than this first size discs, this CD-ROM drive comprises an optical read head, one disc bearing district is read discs to carry this, be read discs with a Spindle Motor to rotate this, this method comprises the following steps:
(a) this optical read head is moved to a primary importance, this primary importance is the radius that is positioned at apart from this first size discs of this Spindle Motor;
(b) launch one first laser by this optical read head to this disc bearing district, and read the reflected signal of this first laser; And
(c), judge whether this disc bearing district has put this and be read discs by the reflection of this first laser.
27. method as claimed in claim 26 wherein when the reflection of this first laser is lower than a predetermined value, judges that this disc bearing district do not put this and be read discs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101026640A CN1329908C (en) | 2003-10-28 | 2003-10-28 | Method for detecting optical disk and its optical disk driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101026640A CN1329908C (en) | 2003-10-28 | 2003-10-28 | Method for detecting optical disk and its optical disk driver |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610077210 Division CN1949380A (en) | 2003-10-28 | 2003-10-28 | Method for detecting light disk and light disk driver thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1612248A true CN1612248A (en) | 2005-05-04 |
| CN1329908C CN1329908C (en) | 2007-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2003101026640A Expired - Fee Related CN1329908C (en) | 2003-10-28 | 2003-10-28 | Method for detecting optical disk and its optical disk driver |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105096986A (en) * | 2014-05-12 | 2015-11-25 | 连秉然 | Automatic optical disc detecting system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3056967B2 (en) * | 1995-02-24 | 2000-06-26 | 株式会社朝日コーポレーション | Disc player |
| JP2000011526A (en) * | 1998-06-16 | 2000-01-14 | Mitsubishi Electric Corp | Magnetic recording and reproducing device and method for detecting presence or absence of magnetic recording medium |
| KR100484455B1 (en) * | 2002-03-13 | 2005-04-20 | 엘지전자 주식회사 | Method for determining disk size in optical disc driver |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105096986A (en) * | 2014-05-12 | 2015-11-25 | 连秉然 | Automatic optical disc detecting system |
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| Publication number | Publication date |
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| CN1329908C (en) | 2007-08-01 |
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