CN100419887C - Controlling device and method for opening and closing tray of optical disk player - Google Patents
Controlling device and method for opening and closing tray of optical disk player Download PDFInfo
- Publication number
- CN100419887C CN100419887C CNB2004100532033A CN200410053203A CN100419887C CN 100419887 C CN100419887 C CN 100419887C CN B2004100532033 A CNB2004100532033 A CN B2004100532033A CN 200410053203 A CN200410053203 A CN 200410053203A CN 100419887 C CN100419887 C CN 100419887C
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- pallet
- tray
- opening
- closing
- signal
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Abstract
The present invention relates to a control device and a method for opening and closing a tray of an optical disk player. When an optical disk tray of the optical disk player is opened or closed, the control device irradiates laser beams towards the lower end of the tray and detects reflected electrical signals. The control device for opening and closing a tray an optical disk player comprises the tray, a reflection body arranged on the inner side of the tray, an optical picker used for irradiating laser, a microprocessor and a control loading motor, wherein the tray is used for loading an optical disk when the optical disk is inserted in/taken out and can make front/back movement on a base plate. The optical picker obtains reflection signals from the reflection body; the microprocessor senses that whether a tray movement command for opening/closing the tray is input. Signals are obtained by utilizing the detection of the optical picker, and the control loading motor controls the transference of the tray. Because laser signals are utilized when the tray is opened and closed, a stopping starting point of the loading motor can be accurately controlled, and the problem of poor contact of a contact type switch can be avoided.
Description
(1) technical field
The invention relates to the tray opening and closing control device and the method thereof of Disc player, especially about in the middle of Disc player, when the optical disc tray opening and closing operations is carried out, to the bottom of pallet illuminating laser beam, detect a kind of tray opening and closing control device and the method thereof of Disc player of the electric signal of reflection.
(2) background technology
Fig. 1 is the structural drawing of the tray opening and closing control device of the Disc player in the middle of the prior art.
As shown in Figure 1, the 1st inductor 20 and the 2nd inductor 30 are set in optical disc tray 14 inside, are used for the switching of optical disc tray 14 of perceived light disk broadcasting device 10.Here, the 1st inductor 20 is settled on CD (not shown) the part optional position in the middle of being arranged in optical disc tray 14.Like this, CD just can perceive after being put on the pallet.In addition, the 1st inductor 20 is made of jointly pressure inductor and image inductor.That is, judge whether to exist CD by the pressure of perception CD or by ultraviolet ray.
In addition, the 2nd inductor 30 is not used for placing on the optional position of CD in the middle of being arranged on optical disc tray 14, comprises pressure inductor and image inductor.That is, after the user is placed on CD on the optical disc tray, hand is placed on any fulcrum above the 2nd inductor 30, perhaps applies certain pressure to the 2nd inductor 30, the 2nd inductor 30 utilizes ultraviolet ray just can perceive.Optical disc tray on-off switch 12 is to produce the switch that signal was opened/closed to optical disc tray 14 among Fig. 1.
Fig. 2 is the structured flowchart of tray opening and closing control device of Disc player of an embodiment of use of the present invention.
As shown in Figure 2, this device comprises:
Whether the perception CD is placed on the 1st inductor 20 on the optical disc tray 14;
The 2nd inductor 30 of the shutdown signal of perception customer requirements closing CD pallet 14;
Produce the optical disc tray on-off switch 12 of opening/close signal of optical disc tray 14 according to customer requirements;
Produce the microprocessor 40 of the control signal of closing or open optical disc tray 14 according to the output signal of the perceptual signal of the 1st inductor 20, the 2 inductors 30 and optical disc tray on-off switch 12;
The drive division 50 of the control signal closing CD pallet 14 that produces according to microprocessor 40.
In addition, in order to install or take out CD (not shown) when opening optical disc tray 14, use optical disc tray on-off switch 12.Under optical disc tray 14 closing state, press optical disc tray on-off switch 12, provide this input signal to microprocessor 40, then, microprocessor 40 transmits control signal to drive division 50.Then, drive division 50 drives, and optical disc tray 14 is opened.
Place CD on the above-mentioned optical disc tray of opening 14, the 1st inductor 20 perceives the existence of CD, sends perceptual signal to microprocessor 40.Then, perceive the shutdown signal of optical disc tray 14 as the 2nd inductor 30 of ultraviolet inductor there from the user, send these perceptual signals to microprocessor 40, microprocessor 40 will send the control signal of closing CD pallets 14 to drive division 50.
That is, microprocessor 40 only all just can transmit control signal to drive division 50 in the input at two of the perceptual signals of the 1st inductor 20 and the 2nd inductor 30.Because, in the middle of the user is put into CD process on the optical disc tray 14, before placing CD, user's hand channel is crossed the 2nd inductor 30, the 2 inductors 30 will send to microprocessor 40 with this perceptual signal, like this, before CD does not also place, optical disc tray 14 just might begin to have closed, and therefore, microprocessor 40 only all just can transmit control signal to drive division 50 in the input at two of the perceptual signals of the 1st inductor 20 and the 2nd inductor 30.
As a result, microprocessor 40 when receiving the perceptual signal of the 2nd inductor 30 again, will send the control signal of relevant requirements closing CD pallet 14 to drive division 50 behind the perceptual signal that receives the 1st inductor 20.In addition, drive division 50 comprises motor driving part and motor.
In addition, the another one embodiment of prior art is provided with respectively to open aware switch and close aware switch in the opening scope of pallet, therefore a lot of problems such as loose contact can appear in the CD-ROM drive motor of the pallet of the opening/closing state of perception pallet, and then control then.In addition, because must two open aware switch and close aware switch,, therefore when making, bother very much so need a lot of links.In addition because will use 2 sections switches, so the cost of product also will rise.
(3) summary of the invention
The present invention carries out in order to address the above problem, the object of the present invention is to provide a kind of tray opening and closing control device and method thereof of Disc player, the laser radiation that utilizes the CD light picker is controlled the switching of optical disc tray to the volume reflection that the reflection part of tray surface obtains.
Another object of the present invention is that the bottom that is provided at pallet is provided with columnar reflection part, makes its tray opening and closing control device and method thereof through a kind of Disc player of light picker upper end.
Another purpose of the present invention is to provide the light signal that the reflection part of pallet can be reflected to be converted to electric signal, perceives the position of pallet then, thereby carries out the tray opening and closing control device and the method thereof of the Disc player of position control.
To achieve these goals, the tray opening and closing control device of Disc player of the present invention is characterized in that comprising:
Pallet, loading optical disk when being used for insertion/taking-up CD can carry out front/rear moving on substrate;
Reflecting body is arranged on the inboard of above-mentioned pallet with the semicircular cylinder shape, can reflect when tray opening and closing from the laser of described light picker irradiation, and described reflecting body is to be provided with a plurality of according to certain intervals in the pallet inside lower end;
Light picker, irradiating laser obtains reflected signal from above-mentioned reflecting body then;
Microprocessor, whether perception has imported the pallet movement directive of pallet opening/closing, utilization detects the signal that obtains from above-mentioned light picker, the control loading motor, the handover of control pallet, after described microprocessor receives the signal that obtains from the reflection of the reflecting body of described pallet by described light picker,, just loading motor is stopped behind the certain hour if receive pulse signal twice in the above-mentioned signal that receives.
In addition, the tray opening and closing control method of Disc player of the present invention is characterized in that comprising:
First step, input pallet opening/closing command key is towards certain orientation driving tray motor;
Second step in the process that pallet is transferred under the driving of above-mentioned loading motor, receives the pulse signal of the reflecting body reflection of pallet from light picker;
Third step, the aforesaid operations process receives pulse signal twice after finishing, and behind the certain hour, stops loading motor, thereby stops the handover operation of pallet.
Best, above-mentioned light picker utilizes focusing mistake (S-CURVE) signal of reflection then to the reflecting body illuminating laser beam of pallet, makes microprocessor perceive the position of pallet.
Effect of the present invention:
The tray opening and closing control device and the method thereof of a kind of Disc player of the present invention that has above-mentioned formation and operate as mentioned above are provided with a plurality of reflecting bodys in the pallet inside bottom surface, thereby can be when opening and closing pallet, utilize laser signal, more exactly, more be added with reliability the control loading motor stop starting point.
In addition, because be provided with reflecting body in tray bottom surface, thus can remove two sections switches of contact of prior art, and can shorten the light picker connecting line that is connected on this switch and the length of pliable and tough cable.
In addition because be to utilize the laser controlling pallet to stop, so, than the existing contact switch, more permanent, and the problem of the loose contact that can prevent so produce.
For further specifying above-mentioned 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 the structural drawing of the tray opening and closing control device of the Disc player in the middle of the prior art.
Fig. 2 is the structured flowchart of tray opening and closing control device of the Disc player of one embodiment of the present of invention.
Fig. 3 (a) and (b) are the structural drawing of the tray opening and closing control device of Disc player of the present invention.
Fig. 4 (a) and (b) are the open and-shut mode concept map of the optical disc tray on the light picker.
Fig. 5 is the structural drawing of tray opening and closing control device.
Fig. 6 (a) and (b), (c) are each oscillogram of the present invention.
Fig. 7 and Fig. 8 are the operational flowchart of the tray opening and closing control method of Disc player of the present invention.
The symbol description of major part in the accompanying drawing:
110, main substrate 120, pallet
111, light picker 112 is to the thing lens
113, light picker substrate 114, loading motor
121, CD installation portion 122, reflecting body
130, microprocessor
(5) embodiment
Below with reference to accompanying drawings the tray opening and closing control device of Disc player of the present invention and the embodiment of method thereof are elaborated.
Fig. 3 (a) and (b) are the structural drawing of the tray opening and closing control device of Disc player of the present invention.
Fig. 4 (a) and (b) are the open and-shut mode concept map of the optical disc tray on the light picker.
Fig. 5 is the structural drawing of tray opening and closing control device.
With reference to Fig. 3 to Fig. 5, the tray opening and closing control device of Disc player of the present invention comprises:
Reflecting body 122 (example: the 1st reflecting body 122a, the 2nd reflecting body 122b) is arranged on the inboard of above-mentioned pallet, and semi-cylindrical shaped is provided with according to certain intervals (d);
Light picker transfer device (not shown) is transferred above-mentioned light picker 111;
Tray conveying apparatus (not shown) comprises loading motor 114 and the gear of transferring pallet.
Below, the embodiment to the tray opening and closing control device of Disc player of the present invention with said structure is elaborated with reference to the accompanying drawings.
With reference to Fig. 3 to Fig. 5, main substrate is fixed tray 120 about in the of 110, and move forward and backward it, pallet 120 relies on main substrate 110 to be fixed up and down, and be arranged on the main substrate 110, move before and after on main substrate 110, insert or eject, be installed on the rotating disk on the light picker substrate (not shown) being installed in CD on the CD installation portion 121 in device.
Inside lower end at above-mentioned pallet 120 is provided with a plurality of semi-cylindrical shapeds (U) reflecting body 122 (example: the 1st reflecting body 122a, the 2nd reflecting body 122b) according to certain intervals.Above-mentioned reflecting body 122 is to adhere to reflecting material or use the bigger material (being the high material of brightness) of volume reflection in tray bottom surface, obtains a large amount of reflected light in the middle of the laser of irradiation.
In addition, above-mentioned reflecting body 122 is arranged on pallet 120 inboards, thereby can all pass through above the light picker 111 when pallet 120 opens and closes.In order to can be good at reflection, the structure that is set to give prominence to.
In addition, the loading motors 114 above the main substrate 110 are to produce to be used for the motor of power of opening/closing pallet 120.The tray conveying apparatus that transmits this power comprises pulley, travelling belt, gear etc., by with being connected of gear, make pallet 120 front-rear reciprocation movements.
At this moment, for ejection tray 120, when pushing tray opening and closing key (KEY), loading motor 114 is driven along clockwise direction, and the driving force of loading motor 114 is sent on the pallet 120 by tray conveying apparatus, and pallet 120 will move to the left.At this moment, in the middle of the process of opening pallet 120 fully, the light picker 111 that is arranged on the light picker substrate 113 passes through thing lens 112 to pallet 120 bottom surface illuminating laser beams.Here, laser beam is that the DVD laser diode sends.
Like this, be transplanted on the above-mentioned laser beam that the semicylindrical reflecting body 122 (example: the 1st reflecting body 122a, the 2nd reflecting body 122b) of the pallet 120 on light picker top will reflected illumination, beam reflected is by being detected by optical detection part via optical instrument thing lens 112, and the reflected signal that is detected is communicated to microprocessor 130.
At this moment, shown in Fig. 4 (a), when pallet 120 was moved forward, after light picker 111 obtained the 1st reflected signal (S-Curve) certain hour from the 1st reflecting body 122a, the 2nd reflecting body 122b obtained the 2nd reflected signal (S-Curve).
Here, above-mentioned light picker 111, shown in Fig. 6 (a), the signal of pallet 120 reflections is a light signal, i.e. S-Curve signal (for focusing on wrong (focus error) signal).That is, during rotary-tray 120, use DVD laser, go up illuminating laser beam, recognize pulse signal corresponding to the S-Curve microprocessor 130 that reflects at the reflecting body 122 (example: the 1st reflecting body 122a, the 2nd reflecting body 122b) that certain intervals (d) is provided with.In addition, microprocessor 130 detects whole two pulse signals, just recognizes the signal that stops tray conveying.
At this moment, whether no matter two pulse signals that microprocessor 130 recognizes all detect, with the time of insertion/ejection CD or the interval d of above-mentioned reflecting body, the switching time of pallet etc. is foundation, after two pulse signals take place, behind the certain hour, just stop the driving of loading motor 114.
On the contrary, when pressing the tray opening and closing key and inserting pallet 120, loading motor 114 will counterclockwise be obtained, and the driving force of loading motor 114 is sent on the pallet 120 by tray conveying apparatus, so pallet 120 can be transferred along right direction.
At this moment, in the process that handover pallet 120 inserts fully, the light picker 111 that is provided with on the light picker substrate 113 is by thing lens 112 are arrived pallet 120 bottom surfaces with laser beam irradiation, shown in Fig. 4 (b).Above-mentioned irradiated laser beam obtains being installed in the reflection of the outstanding reflecting body 122 (example: the 1st reflecting body 122a, the 2nd reflecting body 122b) that is provided with of semi-cylindrical shaped of pallet 120 inside lower end portions, the above-mentioned laser beam that is reflected is detected by photodetector by light picker 111, and detected signal is communicated on the microprocessor 130.
At this moment, microprocessor 130, shown in Fig. 6 (b), (c), the induction of signal that the 2nd reflecting body 122b is reflected is identified as 1 subpulse signal, and the 1 subpulse induction of signal that the 1st reflecting body 122a is reflected is identified as the stop pulse signal.According to this stop pulse signal, microprocessor 130 stops the driving of loading motor 114.Here, the stopping starting point and also can after recognizing the stop pulse signal, stop at once driving of loading motor 114, for but can compensate starting point and the tray conveying time difference that recognizes the stop pulse signal, after whether test pallet inserts fully, just determine the time that above-mentioned driving stops.
Fig. 7 and Fig. 8 open/close the operational flowchart of control method for the pallet of Disc player of the present invention.
With reference to Fig. 7, the operating process of the control method that the pallet of Disc player is opened is explained as follows.
S111-S115 recognizes pallet and opens order, move down light picker after, to interior Zhou Yidong feed arrangement (sled), drive loading motor (M+), forwards transfer pallet then.An embodiment moves to most peripheral with above-mentioned feed arrangement, is the control operation point at this fulcrum fixed tray.
S117, in addition, when pallet forwards moved, the reflecting body that is positioned at the pallet lower end will be through above the light picker.At this moment, laser beam obtains opticofacial winking reflex, obtains focus error signal (S-Curve) by light picker, and simultaneously, microprocessor will perceive as pulse signal with the corresponding signal of above-mentioned focus error signal.
S119, at this moment, the stop pulse that the microprocessor input is twice behind the certain hour, stops loading motor.Here, the starting point that stops loading motor is after receiving stop pulse, the starting point that pallet is opened by handover fully.
In addition, with reference to Fig. 8, the operating process of the control method that the pallet of Disc player is opened is explained as follows.
S121-S125 recognizes tray close command, move down light picker after, to interior Zhou Yidong feed arrangement (sled), drive (M-) loading motor, rearward transfer pallet then.
S127, in addition, when pallet forwards moved, the reflecting body that is positioned at the pallet lower end will be through above the light picker.At this moment, laser beam obtains opticofacial winking reflex, obtains focus error signal (S-Curve) by light picker, and simultaneously, microprocessor will perceive as pulse signal with the corresponding signal of above-mentioned focus error signal.
S119 this moment, the stop pulse that the microprocessor input is twice behind the certain hour, stops loading motor.Here, the starting point that stops loading motor is after receiving stop pulse, and pallet is transferred the starting point of inserting fully.
Though the present invention describes with reference to current specific embodiment, but those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, should understand and wherein can make variations and modifications and do not break away from the present invention in a broad sense, so be not 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 distortion of the above embodiment.
Claims (3)
1. the tray opening and closing control device of a Disc player is characterized in that comprising:
Pallet, loading optical disk when being used for insertion/taking-up CD can carry out front/rear moving on substrate;
Reflecting body is arranged on the inboard of described pallet with the semicircular cylinder shape, can reflect when tray opening and closing from the laser of described light picker irradiation, and described reflecting body is to be provided with a plurality of according to certain intervals in the pallet inside lower end;
Light picker, irradiating laser obtains reflected signal from described reflecting body then;
Microprocessor, whether perception has imported the pallet movement directive of pallet opening/closing, utilization detects the signal that obtains from described light picker, the control loading motor, control the handover of described pallet, after described microprocessor receives the signal that obtains from the reflection of the reflecting body of described pallet by described light picker,, just loading motor is stopped behind the certain hour if receive pulse signal twice in the above-mentioned signal that receives.
2. the tray opening and closing control method of the tray opening and closing control device of a Disc player as claimed in claim 1 is characterized in that comprising:
First step, input pallet opening/closing command key is towards certain orientation driving tray motor;
Second step in the process that pallet is transferred under the driving of described loading motor, receives the pulse signal of the reflecting body reflection of pallet from light picker;
Third step, the aforesaid operations process receives pulse signal twice after finishing, and behind the certain hour, stops loading motor, thereby stops the handover operation of pallet.
3. the tray opening and closing control method of Disc player as claimed in claim 2 is characterized in that comprising:
Described light picker utilizes the focus error signal of reflection then to the reflecting body illuminating laser beam of pallet, makes microprocessor perceive the position of pallet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100532033A CN100419887C (en) | 2004-07-28 | 2004-07-28 | Controlling device and method for opening and closing tray of optical disk player |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100532033A CN100419887C (en) | 2004-07-28 | 2004-07-28 | Controlling device and method for opening and closing tray of optical disk player |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1728254A CN1728254A (en) | 2006-02-01 |
| CN100419887C true CN100419887C (en) | 2008-09-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100532033A Expired - Fee Related CN100419887C (en) | 2004-07-28 | 2004-07-28 | Controlling device and method for opening and closing tray of optical disk player |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100419887C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI321317B (en) | 2006-08-29 | 2010-03-01 | Asustek Comp Inc | Optical disc drive |
| CN101136237B (en) * | 2006-08-31 | 2011-01-12 | 华硕电脑股份有限公司 | Light disc machine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0438676A (en) * | 1990-05-31 | 1992-02-07 | Nakamichi Corp | Detecting device for disk player |
| US5539717A (en) * | 1993-12-13 | 1996-07-23 | Daewoo Electronics Co., Ltd. | Player for reproducing both minidisc and compact disc |
| US5631884A (en) * | 1994-02-16 | 1997-05-20 | Samsung Electronics Co., Ltd. | Compact-disc changer using the same optical pickup device used for playing disc for sensing roulette position |
| CN1257602A (en) * | 1997-05-30 | 2000-06-21 | 国际商业机器公司 | Disc reader with automatic closing tray |
| JP4038676B2 (en) * | 2003-05-07 | 2008-01-30 | 株式会社三協リール | Electric reel with anti-rolling device |
-
2004
- 2004-07-28 CN CNB2004100532033A patent/CN100419887C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0438676A (en) * | 1990-05-31 | 1992-02-07 | Nakamichi Corp | Detecting device for disk player |
| US5539717A (en) * | 1993-12-13 | 1996-07-23 | Daewoo Electronics Co., Ltd. | Player for reproducing both minidisc and compact disc |
| US5631884A (en) * | 1994-02-16 | 1997-05-20 | Samsung Electronics Co., Ltd. | Compact-disc changer using the same optical pickup device used for playing disc for sensing roulette position |
| CN1257602A (en) * | 1997-05-30 | 2000-06-21 | 国际商业机器公司 | Disc reader with automatic closing tray |
| JP4038676B2 (en) * | 2003-05-07 | 2008-01-30 | 株式会社三協リール | Electric reel with anti-rolling device |
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| Publication number | Publication date |
|---|---|
| CN1728254A (en) | 2006-02-01 |
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Granted publication date: 20080917 |