CN1641774A - The Method of Controlling Disk Ejection in Optical Drive - Google Patents

Abstract

The invention provides a method for controlling disc ejection in an optical drive, which is briefly described as follows: an optical drive has a pushing device to eject the optical disk, and after receiving an eject command, the optical drive moves the pushing device to contact the optical disk and execute an eject preparation action. After the disc returning preparation action is finished, the output signal of a sensor is detected. When the output signal of the sensor is at low level, the driving device is driven to eject the optical disc; and stopping driving the pushing device until the output signal of the inductor is at a high level. If yes, a disc returning action is completed.

Description

The Method of Controlling Disk Ejection in Optical Drive

technical field

The invention relates to a method for controlling ejection in an optical drive, and in particular to a method for controlling ejection in a suction-type optical drive.

Background technique

With the advancement of computer technology and the popularization of multimedia applications, users' demand for high-capacity and low-cost storage devices is also increasing. Among them, optical storage media has the characteristics of long data retention period and convenient storage media portability and exchange. Become the main storage medium for data backup, multimedia playback, and data exchange. Today, in desktop computers or notebook computers, optical drives have already become standard equipment, and a lot of information is sold or backed up in the form of optical discs, even in many instruments or electrical products with microprocessor cores. You can see the outline corner of the optical drive.

According to the mode of operation, the current CD-ROM drive is divided into two types: tray-type CD-ROM drive and slot-load CD-ROM drive. Generally speaking, the optical drive utilizes the pushing device therein to move the optical disc from the optical drive to the optical drive, and fix it on the spindle motor fixing tray for further access operations.

Among them, in addition to the traditionally common tray-type optical drive, the slot-in optical drive is also becoming more and more popular. The advantage of the slot-in optical drive is that when loading the disc, you only need to place the disc slightly into the advance and retreat opening of the optical drive, and the optical drive can perform the action of loading the disc. Moreover, the slot-in optical drive can effectively use its mechanical structure to drive the optical disc during the whole process of moving in and out of the disc, which greatly increases the convenience of the optical drive in mobile devices. Especially when it is used in a vibrating environment or the user cannot carefully operate the optical drive; such as a car CD stereo or a car navigation database system, the slot-in optical drive is the best choice.

Please refer to FIG. 1 , which is a top view of a slot-in optical drive. In order to control the loading and unloading motion of the slot-in optical drive, the optical drive 100 includes a loading and unloading slot 102 , a first sensor 112 and a second sensor 114 . The figure also shows the positions of two commonly used optical disc sizes: a 12cm optical disc 120 and an 8 cm optical disc 130, to indicate the relative positions of the optical disc and other components. In addition, after the optical disc drive is loaded, the optical disc will be fixed on a spindle motor fixing tray 108, and the output signals of these sensors are used to provide the optical drive to judge the current status of the disc in and out, so as to control the gear 106 and drive the pushing device 104 to Complete the action of loading or unloading.

The slot-in optical drive mainly uses a set of sensors to control the movement of the disk in and out. The sensor can be constructed as a mechanical spring or a connecting rod, and outputs a digital signal of high level (HIGH) or low level (LOW) to indicate its state. When the disc passes through the sensor, the sensor is in a shielding state; at this time, the sensor is in a closed state (OFF), that is, the output signal is low level (LOW). Conversely, when the sensor is in the unshielded state, the sensor is in the open state (ON) at this time, that is, the output signal is high level (HIGH).

Wherein, the second sensor (Sensor 2) 114 is used to control the action of ejecting the disc. When the user presses the eject button (Eject Button), the slot-in optical drive starts to execute the eject action. When the slot-in optical disc drive performs an ejection action, the second sensor 114 is in the state of covering the optical disc; at this time, the state of the second sensor is off. When the slot-in optical drive completes the ejection action, the second sensor is in the state where the optical disc is not covered; at this time, the state of the second sensor is turned on, and the slot-in optical drive will stop the action of ejecting the disc.

According to the radius of the disc, the disc is mainly divided into two types: 8 cm and 12 cm. The current slot-in optical drive can read both 8 cm and 12 cm discs. Therefore, the location of the second sensor must be properly arranged. Especially in the ejection control part of the 8 cm disc, the following will describe in detail the problems faced by the 8 cm disc in the ejection control part.

Figure 2 (a) and (b) are schematic diagrams showing that the distance between the second sensor and the center point of the optical drive is too small. As shown in FIG. 2( a ), once the distance between the designed position of the second sensor 202 and the center point 201 of the optical drive is too small, the 8 cm optical disc 203 will not be ejected completely. As shown in FIG. 2( b ); at this moment, because the second sensor 202 is in the unshielded state of the disc and the output signal changes from low level to high level, the action of ejecting the disc is stopped. However, the disc is still clamped by the rollers, making it difficult for the user to take out the disc.

FIG. 3 is a schematic diagram showing an excessively large distance between the second sensor and the center of the optical drive. Once the distance between the designed position of the second sensor 302 and the center point 301 of the optical drive is too large, the ejection of the 8 cm optical disc 303 cannot be performed. As shown in FIG. 3 , the user has pressed the eject button at this time, but the second sensor 302 is still open because the second sensor 302 is not covered by the 8 cm optical disc 303 , so the action of ejecting the disc cannot be performed. In this way, the user cannot take out the optical disc.

In order to solve the above problems and take into account the disc ejection detection of 12 cm and 8 cm discs, generally speaking, the position of the second sensor will be arranged within the outer circle of the 8 cm disc. Therefore no matter whether the used optical disc is a 12 centimeter optical disc or an 8 centimeter optical disc, the slot-in optical drive can be withdrawn to an appropriate position.

Please refer to FIG. 4 , which shows a flow chart of disc ejection in a known optical drive. If the user wants to execute the eject action, he can press the eject button (Eject Button) or execute the eject action from within the optical drive system. As shown in FIG. 4 , after receiving an eject command 401 , the optical drive moves the pushing device to contact the optical disc 402 , and starts to detect whether the output signal of the second sensor is low level 403 . If the output signal of the second sensor is at a low level, it means that the second sensor is in the optical disc shielding state; at this time, the optical drive will drive the pushing device to eject the optical disc 404 . If the output signal of the second sensor is not low level, the optical drive will return to the initial state: the optical drive receives an eject command 401 to wait for the next eject command.

As above, when the optical drive receives an eject command 402 and the detected output signal of the second sensor is low, the optical drive will drive the pushing device to eject the optical disc 404; generally speaking, driving the pushing device generally refers to rotating the roller. Then, detect whether the output signal of the second sensor is high level 405, if the output signal of the second sensor is high level, it means that the second sensor is in the unshielded state of the disc, that is, the disc has been ejected; , the eject action 406 will be stopped. If the output signal of the second sensor is not at high level, the optical drive will continue to drive the pushing device to eject the optical disc 404; until the output signal of the second sensor is at high level, the disc ejection operation 406 will not be stopped.

Please refer to FIG. 5 , which is a timing diagram of the known second sensor when the disc is ejected. When the state of the second sensor is on, the output signal of the second sensor is high level; when the state of the second sensor is off, the output signal of the second sensor is low level. As shown in FIG. 5 , point A indicates receiving an eject command and starting to detect the output signal of the second sensor.

Under normal circumstances, the output signal of the second sensor detected at point A should be low level, indicating that the second sensor is in the state of covering the optical disc; and the pushing device is driven to eject the optical disc. Point B is the transition of the output signal of the second sensor from low level to high level; it indicates that the second sensor is in a state where the disc is not covered, that is, the disc has been completely ejected, and the ejection action will stop at this time.

After receiving an eject command, the optical drive will move the pushing device to contact the optical disc. As shown in FIG. 5 , the output signal of the second sensor detected at point A should be at a low level, indicating that the second sensor is in the state of being covered by the optical disc. However, when the pusher comes into contact with the disc, it may cause a slight shifting and wobbling of the disc. Since the second sensor is located within the outer boundary of the 8 cm optical disc, the transposition and shaking of the optical disc will cause the output signal of the second sensor to be incorrect. At this time, the state of the second sensor may change from being covered by the disc to being not covered by the disc; and the output signal of the second sensor also changes from a low level to a high level. In this way, it will be impossible to drive the pushing device to take out the disc, resulting in interruption of the disc ejection action. For the user, it will not be possible to successfully complete the ejection action, causing great inconvenience in use.

Contents of the invention

The purpose of the present invention is to provide a method for controlling ejection in an optical drive, which is used to solve the problem that the optical disc is prone to translocation and shaking when the ejection starts, and the output signal of the second sensor is incorrect.

The invention proposes a method for judging disk ejection in an optical drive. Its brief description is as follows: an optical drive has a pushing device to eject the optical disc, and after receiving an eject command, the optical drive moves the pushing device to contact the optical disc, and performs an ejection preparation action. After the disk ejection preparation is completed, the output signal of a sensor is detected. When the output signal of the sensor is low level, the driving device is driven to eject the disc; until the output signal of the sensor is high level, the driving device is stopped. If so, complete a disk-unloading action.

In order to further understand the features and technical content of the present invention, please refer to the following detailed description and drawings related to the present invention. However, the drawings are provided for reference and illustration only, and are not intended to limit the present invention.

Brief description of the drawings

Fig. 1 is a top view of a slot-in optical drive;

Figures 2(a) and 2(b) are schematic diagrams showing that the distance between the second sensor and the center point of the optical drive is too small;

FIG. 3 is a schematic diagram showing that the distance between the second sensor and the center point of the optical drive is too large;

Fig. 4 is a flow chart of disc ejection in a known optical drive;

FIG. 5 is a timing diagram of the second sensor when the disc is known to be ejected;

Fig. 6 is a flow chart of disc removal from the optical drive in the present invention;

FIG. 7 is a timing diagram of the second sensor when the disk is ejected according to the present invention.

Description of reference symbols

100 CD-ROM drive

102 advance and retreat handicap

104 Pushing device

106 gears

108 Spindle motor fixing tray

112 The first sensor

114 Second sensor

120 12 cm disc

130 8 cm disc

201 CD drive center point

202 Second sensor

203 8 cm disc

301 CD drive center point

302 Second sensor

303 8 cm disc

401 CD-ROM received an eject command

402 Move the pusher to contact the disc

403 Detect whether the output signal of the second sensor is low level

404 Drive pusher to eject disc

405 Detect whether the output signal of the second sensor is high level

406 Stop withdrawal action

601 The optical drive receives an eject command

602 Move the pusher to contact the disc

603 Execute a withdrawal preparation action

604 Detect whether the output signal of the second sensor is low level

605 Drive pusher to eject disc

606 Detect whether the output signal of the second sensor is high level

607 Stop withdrawal action

Detailed ways

Because the second sensor is located within the outer boundary of the 8 cm optical disc; therefore, when the ejection action is started, that is, when the drive device starts to contact the optical disc, it will cause a slight translocation and shaking of the optical disc. Further, the second sensor misjudgments; thus, the optical drive will not be able to successfully complete the ejection action. Therefore, the present invention proposes a method for controlling disc ejection in an optical drive to solve the situation of misjudgment by the second sensor.

Please refer to FIG. 6 , which is a flow chart of the disk ejection of the optical drive in the present invention. Include the following steps:

Step 601: The CD-ROM drive receives an eject command;

Step 602: moving the pushing device to contact the disc;

Step 603: Execute an action to prepare for ejection;

Step 604: Detect whether the output signal of the second sensor is low level;

Step 605: drive the pushing device to eject the disc;

Step 606: Detect whether the output signal of the second sensor is at a high level; and

Step 607: Stop ejecting the disk.

If the user wants to execute the eject action, he can press the eject button (Eject Button) or execute the eject action from within the optical drive system. As shown in FIG. 6 , the optical drive receives an eject command 601 ; and moves the pushing device to contact the optical disc 602 . In the present invention, when the optical drive receives an ejection command 601 and moves the pushing device to contact the optical disc 602 , it will execute an ejection preparation action 603 . As far as the current optical drive is concerned, the pushing device refers to the roller. When the roller moves up and down to contact the optical disk; and when the roller is not rotated, the optical disk will shake and shift due to the contact of the roller. At this time, the present invention will make the optical disc reach a steady state by performing an ejection preparation action; the steady state means that the optical disc stops shaking and restores to a fixed position.

The ejection preparation action refers to waiting for a specific time, which will be at least longer than the time during which the disc may shake and translocate to reach a steady state; that is, after the specific time passes, the output signal of the second sensor will ensure that it is high level. In this way, it can solve the situation that the output signal of the second sensor is incorrect due to the shaking and transposition of the optical disc when the disc ejection action is performed at the beginning.

After performing an eject preparation operation 603 , it is detected 604 whether the output signal of the second sensor is at a low level. If the output signal of the second sensor is at low level, it means that the second sensor is in the state of covering the optical disc; at this time, the optical drive will drive the pushing device to eject the optical disc 605 . If the output signal of the second sensor is not low level, the optical drive will return to the initial state: the optical drive receives an eject command 601 to wait for the next eject command.

As above, when the optical drive moves the pushing device to contact the optical disc 602 and performs an ejection preparation operation 603 and detects that the output signal of the second sensor is low, the optical drive will drive the pushing device to eject the optical disc 605 . Then, detect whether the output signal of the second sensor is high level 606, if the output signal of the second sensor is high level, it means that the second sensor is in the disc unshielded state, that is, the disc has been ejected. At this point, the disc ejection action 607 will be stopped. If the output signal of the second sensor is not at high level, the optical drive will continue to drive the pushing device to eject the optical disc 605; until the output signal of the second sensor is at high level, the disc ejection operation 607 will not be stopped.

Please refer to FIG. 7 , which is a timing diagram of the second sensor when the disk is ejected according to the present invention. When the state of the second sensor is on, the output signal of the second sensor is high level; when the state of the second sensor is off, the output signal of the second sensor is low level. Point C represents receiving an eject command and moving the pushing device to contact the disc, and point D represents starting to detect the output signal of the second sensor. In the present invention, due to the execution of an ejection preparation action, points C and D will be spaced for a certain period of time to solve the problem that the disc is prone to shaking and translocation when the ejection starts, resulting in incorrect output signals of the second sensor question.

In this way, the output signal of the second sensor detected at point D is guaranteed to be low level, indicating that the second sensor is in the state of covering the optical disc; and the pushing device is driven to eject the optical disc. Point E is the transition of the output signal of the second sensor from low level to high level; it indicates that the second sensor is in a state where the disc is not covered, that is, the disc has been completely ejected, and the ejection action will stop at this time.

Therefore, the advantage of the present invention is to solve the problem that the output signal of the second sensor is incorrect due to the easy vibration and translocation of the disc when the disc is ejected.

In summary, although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the scope of the appended patent application.

Claims (6)

1. A method for controlling the ejection of a disc in an optical drive, used for an optical drive with a pushing device to withdraw from a disc, comprising the following steps: moving the pushing device to contact the optical disc; performing an ejection preparation action for the disc; and The pushing device is driven to eject the disc according to an output signal of a sensor. 2. The method of claim 1, wherein the optical drive is a slot-in optical drive. 3. The method of claim 1, wherein the pushing device is a roller. 4. The method of claim 1, wherein the ejection preparation action is to wait for a specific time. 5. The method as claimed in claim 1, wherein when the sensor is in a disc shielding state, the pushing device is driven to eject the disc. 6. The method of claim 1, wherein the driving device is stopped when the sensor is in an unshielded optical disk state.

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