JP2018116754A - Optical disk reproducing device and optical disk reproducing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical reproducing device and an optical reproducing method to solve a problem that a reinsertion cannot be detected in the case of a semitransparent disk and a loading device does not start properly.SOLUTION: An optical disk reproducing device for loading an optical disk based on a detection result by a photo-sensor includes: an insertion slot to which the optical disk is inserted; a first photo-sensor capable of detecting the insertion of the optical disk into the insertion slot; a second photo-sensor which can detect that the optical disk is inserted into the insertion slot and whose intensity of the sensor light emitted from the light emitting portion is weaker than that of the first photo-sensor; a third photo-sensor capable of detecting that the optical disk is reinserted into the insertion slot while being ejected from the insertion slot; and a control section for controlling each photo-sensor, in which the control section determines a type of the optical disk inserted into the insertion slot based on the detection results of the first and second photo-sensors and sets the intensity of the sensor light of the third photo-sensor based on the determined type.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an optical disc playback apparatus and an optical disc playback method.

  2. Description of the Related Art There are known optical disc playback apparatuses that play back optical discs such as BD (Blu-ray (registered trademark) Disc), DVD (Digital Versatile Disc), and CD (Compact Disc). This type of optical disk includes a normal disk having a high light blocking degree that substantially blocks light in the visible light region and an infrared light region, and a semi-transparent disk having a low light blocking degree that partially transmits the light. In the optical disk reproducing device, when insertion of the optical disk is detected by the photosensor, the loading device is activated to move the optical disk to the reproducing unit.

  For example, Patent Document 1 describes a specific configuration of this type of optical disc reproducing apparatus. The optical disk reproducing device described in Patent Document 1 includes a first photosensor and a second photosensor in which a polarizer and a polarizing plate are provided between a light emitting unit and a light receiving unit. Based on the detection results of the sensor and the second photosensor, it is configured to determine whether to insert a normal disk or a translucent disk.

Japanese Patent Laid-Open No. 11-345453

  As an example of using the optical disk reproducing apparatus, it is conceivable that the user manually pushes the optical disk in order to reinsert it while the optical disk is being ejected. However, in the conventional optical disk reproducing apparatus including the optical disk reproducing apparatus described in Patent Document 1, when the medium is a translucent disk, re-insertion cannot be detected, and the loading apparatus does not start correctly. The

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an optical disc playback apparatus and an optical disc playback method suitable for correctly loading a re-inserted optical disc regardless of the type of the optical disc. It is to be.

  An optical disk reproducing apparatus according to an embodiment of the present invention is an apparatus for loading an optical disk based on a detection result by a photosensor, and can detect that an optical disk is inserted into an insertion slot and an optical disk is inserted into the insertion slot. The first photosensor, the second photosensor capable of detecting that the optical disc has been inserted into the insertion slot, and the intensity of the sensor light emitted from the light emitting unit is weaker than the first photosensor, and the optical disc is the insertion slot A third photosensor capable of detecting reinsertion into the insertion slot in the middle of being discharged from the camera, and a control unit for controlling each photosensor. The control unit determines the type of the optical disc inserted into the insertion slot based on the detection results of the first and second photo sensors, and sets the intensity of the sensor light of the third photo sensor based on the determined type.

  In one embodiment of the present invention, the control unit is configured to detect the sensor light emitted from the light emitting unit of each photosensor by the optical disc inserted into the insertion port based on the detection results of the first and second photosensors. It is determined whether the disk is a normal disk having a light blocking layer structure or a translucent disk having a layer structure through which sensor light can be transmitted. If it is determined to be a semi-transparent disk, the intensity of the sensor light of the third photo sensor is set to a second intensity that is shielded by the semi-transparent disk and is weaker than the first intensity. It is good also as a structure.

  In one embodiment of the present invention, the intensity of the sensor light of the first photosensor is, for example, an intensity that is normally shielded by a disk and transmitted through a translucent disk, and the intensity of the sensor light of the second photosensor is, for example, It is the intensity shielded from light by a normal disk and a semi-transparent disk. In this case, the control unit determines that the disk is normally inserted when the first and second photosensors cannot detect the passage of the sensor light, and only the second photosensor of the first and second photosensors is determined. In this case, it may be determined that a translucent disc has been inserted when the sensor light cannot be detected.

  In one embodiment of the present invention, the control unit may be configured to perform pulsed emission control on at least one light emitting unit of the first photosensor and the second photosensor.

  In one embodiment of the present invention, the control unit may be configured to perform predetermined error processing when a detection signal other than the pulse-shaped detection signal is output from the photosensor under pulse emission control.

  Moreover, the optical disk reproducing device according to an embodiment of the present invention may be configured to include a display unit. In this case, the predetermined error process is a process of displaying an error message on the display unit, for example.

  In addition, the optical disc reproducing method according to the embodiment of the present invention has a first photosensor disposed near the insertion port of the optical disc reproducing apparatus, and the intensity of sensor light emitted from the light emitting unit is higher than that of the first photosensor. Based on the detection result of the weak second photosensor, a determination step for determining the type of the optical disk inserted into the insertion slot, and based on the determined type, the center of rotation of the optical disk is greater than that of the first and second photosensors. And a setting step for setting the intensity of the sensor light of the third photosensor arranged at a close position.

  According to an embodiment of the present invention, in the determination step, the optical disc inserted into the insertion slot is ejected from the light emitting unit of each photosensor based on the detection results of the first and second photosensors. If it is determined whether it is a normal disk with a layer structure that blocks sensor light or a translucent disk with a layer structure that can transmit sensor light, and it is determined as a normal disk in the determination step in the setting step When the intensity of the sensor light of the third photosensor is set to the first intensity and the determination step determines that the disk is a translucent disk, the intensity of the sensor light of the third photosensor is blocked by the translucent disk. The second intensity may be set to be weaker than the first intensity.

  In one embodiment of the present invention, the intensity of the sensor light of the first photosensor is, for example, an intensity that is normally shielded by a disk and transmitted through a translucent disk, and the intensity of the sensor light of the second photosensor is, for example, It is the intensity shielded from light by a normal disk and a semi-transparent disk. In this case, in the determination step, if the first and second photosensors cannot detect sensor light transmission, it is determined that a normal disk has been inserted, and the second photosensor of the first and second photosensors is determined. If it is not possible to detect the passage of sensor light alone, it may be determined that a translucent disk has been inserted.

  In one embodiment of the present invention, pulse emission control may be performed on at least one of the first photosensor and the second photosensor.

  The optical disc reproducing method according to an embodiment of the present invention includes a step of determining whether or not a pulse-like detection signal is output from a photosensor under pulse emission control for a certain period of time, and the pulse-like detection signal is constant. The method may further include a step of performing predetermined error processing when it is determined that the time is not output. The predetermined error process is a process of displaying an error message on the display unit, for example.

  According to an embodiment of the present invention, an optical disc playback apparatus and an optical disc playback method suitable for correctly loading a re-inserted optical disc regardless of the type of the optical disc are provided.

It is a block diagram which shows the structure of the optical disk reproducing | regenerating apparatus which concerns on one Embodiment of this invention. 1 is a diagram illustrating a schematic configuration of an optical disk reproducing device according to an embodiment of the present invention. It is a schematic internal block diagram when the inside of the housing | casing of the optical disk reproducing device which concerns on one Embodiment of this invention is seen from upper direction. It is a figure which shows the flowchart of the pre-loading process performed before loading of an optical disk in the system control part of the optical disk reproducing device which concerns on one Embodiment of this invention. It is a figure which shows the flowchart of the discharge | emission / reinsertion determination process performed in the system control part of the optical disk reproducing | regenerating apparatus which concerns on one Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following, an optical disk reproducing apparatus will be described as an example of an embodiment of the present invention.

[Configuration of optical disc playback apparatus]
FIG. 1 is a block diagram showing a configuration of an optical disc playback apparatus 1 according to an embodiment of the present invention. FIG. 2 is a diagram showing a schematic configuration (mainly mechanical configuration) of the optical disc playback apparatus 1 according to an embodiment of the present invention. An optical disc reproducing apparatus 1 according to the present embodiment is mounted on, for example, a vehicle, and reads / reproduces data recorded on the recording surface RS of the optical disc D. Examples of the optical disc D include CD-ROM, CD-DA (Compact Disc Digital Audio), CD Extra (CD-EXTRA), DVD (Digital Versatile Disc), BD (Blu-ray (registered trademark) Disc), and the like. Can be mentioned.

  As shown in FIG. 1, the optical disc playback apparatus 1 includes an optical disc processing apparatus 100 and a host computer 200 connected to the optical disc processing apparatus 100.

  As shown in FIGS. 1 and 2, the optical disc processing apparatus 100 includes a rotation motor 102, a pickup unit 104, a servo control unit 106, a rotation speed control unit 108, a data decoding unit 110, a buffer memory 112, a data transfer unit 114, A system control unit 116, a first photosensor 118A, a second photosensor 118B, a third photosensor 120, a loading device 122, a turntable 124, a limit switch 126, a light emission adjusting unit 128, and a housing 150 are provided.

  The rotation motor 102 rotates the optical disc D, and is illustratively a stepping motor or a spindle motor. A turntable 124 that supports the optical disc D is rotatably connected to the rotation motor 102. When the rotation motor 102 is driven, the turntable 124 and the optical disc D supported by the turntable 124 rotate.

  The pickup unit 104 is a mechanism for reading data recorded on the recording surface RS of the optical disc D, and includes a pickup 104A and a pickup delivery device 104B. The pickup 104A irradiates the recording surface RS with laser light having a wavelength determined by the standard, receives return light from the irradiated recording surface RS, and outputs a light reception result. The pickup delivery device 104B moves the pickup 104A in the radial direction of the optical disc D by driving the sled motor 104Ba.

  The servo control unit 106 servo-controls the irradiation light amount of the laser light, the focus position, and the tracking position based on the light reception result output from the pickup 104A. Specifically, the servo control unit 106 compares the light amount of the return light of the laser light with the reference value, and controls the irradiation light amount of the laser light so that the light amount of the return light maintains the light amount of the reference value. The servo control unit 106 performs focus control and tracking control based on the amount of return light.

  The rotational speed control unit 108 variably controls the rotational speed of the optical disc D by rotationally driving the rotational motor 102 by a ZCLV (Zone Constant Linear Velocity) method, a CAV (Constant Angular Velocity) method, or the like.

  The data decoding unit 110 decodes the data recorded on the recording surface RS of the optical disc D based on the light reception result output from the pickup 104A.

  The buffer memory 112 temporarily holds the data decoded by the data decoding unit 110.

  The data transfer unit 114 transfers the data held in the buffer memory 112 to the system control unit 116.

  A system control unit (control unit) 116 controls the optical disc processing apparatus 100 as a whole and controls the entire optical disc playback apparatus 1 in cooperation with the host computer 200. For example, the system control unit 116 controls the light emission of each of the first photosensor 118A, the second photosensor 118B, and the third photosensor 120 via the light emission adjustment unit 128 in order to perform a loading operation. To do.

  The host computer 200 includes a host CPU 202, a key input device 204, and a display unit 206. For example, the host CPU 202 outputs a command to the optical disc processing apparatus 100 in response to a user operation on the key input device 204 to perform optical disc processing, or data acquired from the optical disc processing apparatus 100 (for example, on the recording surface RS of the optical disc D). (Recorded data) is processed and displayed on the display unit 206.

  An insertion slot (slot) 150 a into which the optical disc D is inserted is provided on the front surface of the housing 150.

  FIG. 3 is a schematic internal configuration diagram when the inside of the housing 150 is viewed from above, and mainly shows the positional relationship between the photosensors arranged inside the housing 150. As shown in FIG. 3, the first photosensor 118A and the second photosensor 118B are arranged side by side in the vicinity of the slot 150a. The third photosensor 120 is disposed on the back side of the first photosensor 118A and the second photosensor 118B (position closer to the rotation center of the optical disc D than the first photosensor 118A and the second photosensor 118B). .

  As shown in FIG. 2, the first photosensor 118A includes a light emitting unit 118Ae and a light receiving unit 118Ar. The light emitting unit 118Ae and the light receiving unit 118Ar are installed at positions facing each other across the traveling path of the optical disc D. The light emitting unit 118Ae is a light emitting diode such as an LED (Light Emitting Diode). The light receiving unit 118Ar is, for example, a phototransistor.

  The light receiving unit 118Ar outputs a detection signal to the system control unit 116 during a period in which light emitted from the light emitting unit 118Ae (hereinafter referred to as “sensor light”) is received (for example, a low level voltage is applied to the system). It is input to the port of the control unit 116). Further, the light receiving unit 118Ar does not output a detection signal to the system control unit 116 during a period when the sensor light is not received (for example, a high level voltage is input to the port of the system control unit 116). The light receiving unit 118Ar can detect only light having an intensity of a certain level or higher. Therefore, more precisely, the light receiving unit 118Ar outputs a detection signal during a light receiving period of sensor light of a certain level or higher, and does not output a detection signal during other periods.

  The second photosensor 118B includes a light emitting unit 118Be and a light receiving unit 118Br. The second photosensor 118B has the same configuration as the first photosensor 118A. Therefore, for the second photosensor 118B, the description of the portion overlapping with the first photosensor 118A is omitted as appropriate.

  The third photosensor 120 includes a light emitting unit 120e and a light receiving unit 120r. The third photosensor 120 has the same configuration as the first photosensor 118A. Therefore, for the third photosensor 120, the description of the portion overlapping with the first photosensor 118A is omitted as appropriate.

  The loading device 122 includes a roller 122a and a guide portion 122b. The roller 122a is rotationally driven by a drive source and a drive mechanism that are not shown. The roller 122a sandwiches the optical disc D with the guide portion 122b and rotates to move the optical disc D to a position supported by the turntable 124.

[Loading pre-processing]
FIG. 4 is a flowchart of the pre-loading process that is executed by the system control unit 116 before loading the optical disc D. The optical disc playback apparatus 1 is activated when the power is turned on. Execution of the pre-loading process shown in this flowchart is started at the same time as the start of the system is completed, for example.

[S11 in FIG. 4 (Emission Control of First Photosensor 118A and Second Photosensor 118B)]
In processing step S11, the light emission adjusting unit 128 starts light emission control of the first photosensor 118A and the second photosensor 118B. Accordingly, the light emitting unit 118Ae of the first photosensor 118A emits sensor light having a normal intensity (first intensity). Further, the light emitting portion 118Be of the second photosensor 118B emits pulsed sensor light having a weak intensity (second intensity) that is weaker than the normal intensity. If the intensity of the sensor light is too weak, stray light caused by direct sunlight that has entered the slot 150a becomes noise, and the detection accuracy of the photosensor is likely to decrease. The weak intensity is desirably set to an intensity taking this point into consideration.

[S12 in FIG. 4 (Error Determination)]
In processing step S12, it is determined whether or not a pulse-like detection signal is output from the second photosensor 118B for a certain period of time.

[S13 in FIG. 4 (Display Alert Message)]
This processing step S13 is executed when it is determined in processing step S12 (error determination) that the pulsed detection signal is not output from the second photosensor 118B for a certain period of time (S12: NO). In this case, illustratively, a non-pulsed detection signal (continuous detection signal or the like) is output due to stray light caused by direct sunlight or the like that has entered the slot 150a. In this processing step S13, a predetermined alert message is displayed on the display unit 206 because there is a possibility that the optical disc D is not correctly loaded due to erroneous detection due to stray light. As an example of the alert message, “please avoid direct sunlight from hitting the slot” can be considered. For example, when the user who sees the alert message holds his / her hand in front of the slot 150a, stray light due to direct sunlight can be prevented.

[S14 in FIG. 4 (Determination of Second Photosensor 118B)]
As described above, the first photosensor 118A and the second photosensor 118B are disposed in the vicinity of the slot 150a. Therefore, when the optical disc D is inserted into the housing 150 from the slot 150a, a part of the optical disc D (the leading end portion on the insertion side) receives light from the light emitting portions of the first photosensor 118A and the second photosensor 118B. Get in between the club.

  Here, the optical disk D includes a normal disk having a layer structure that shields sensor light emitted from the light emitting portion of each photosensor and a translucent disk having a layer structure that allows sensor light to pass therethrough. Since the normal disk has a high degree of light shielding, the sensor light of either normal intensity or weak intensity is shielded while being interposed between the light emitting part and the light receiving part of the photosensor. Since the translucent disk has a low degree of light shielding, while it is interposed between the light emitting part and the light receiving part of the photosensor, it shields weak sensor light, but does not shield normal intensity sensor light. More specifically, a part of normal intensity sensor light passes through the semi-transparent disk, so that sensor light of a certain level or more is received by the light receiving unit.

  That is, when the optical disk D inserted into the slot 150a is a normal disk, sensor light transmission is not detected by either the first photosensor 118A or the second photosensor 118B. On the other hand, when the optical disc D inserted into the slot 150a is a translucent disc, the first photosensor 118A detects the passage of sensor light, and the second photosensor 118B does not detect the passage of sensor light.

  This processing step S14 is executed when it is determined in processing step S12 (error determination) that the pulsed detection signal is output from the second photosensor 118B for a certain period of time (S12: YES). In this processing step S14, it is determined whether or not a detection signal is output from the second photosensor 118B.

[S15 in FIG. 4 (Determination of First Photosensor 118A)]
This process step S15 is executed when it is determined in process step S14 (determination of the second photosensor 118B) that a detection signal is output from the second photosensor 118B (S14: YES). In this processing step S15, it is determined whether or not a detection signal is output from the first photosensor 118A.

[S16 in FIG. 4 (determination of no optical disc)]
This process step S16 is executed when it is determined in process step S15 (determination of the first photosensor 118A) that a detection signal is output from the first photosensor 118A (S15: YES). In this case, the passage of sensor light is detected in both the first photosensor 118A and the second photosensor 118B. Therefore, in this processing step S16, it is determined that the optical disc D is not inserted. Next, the process of this flowchart returns to process step S12 (error determination).

[S17 in FIG. 4 (Error Determination)]
This process step S17 is executed when it is determined in process step S15 (determination of the first photosensor 118A) that the detection signal is not output from the first photosensor 118A (S15: NO). In this case, the passage of low intensity sensor light (sensor light of the second photosensor 118B) is detected, and the passage of high intensity sensor light (sensor light of the first photosensor 118A) is not detected. This is usually not possible. Therefore, in this processing step S17, it is determined that an error has occurred. Because of the retry, the process of this flowchart returns to process step S12 (error determination).

[S18 in FIG. 4 (Determination of First Photosensor 118A)]
This process step S18 is executed when it is determined in process step S14 (determination of the second photosensor 118B) that the detection signal is not output from the second photosensor 118B (S14: NO). In this processing step S18, it is determined whether or not a detection signal is output from the first photosensor 118A.

[S19 in FIG. 4 (ordinary disk determination)]
This process step S19 is executed when it is determined in process step S18 (determination of the first photosensor 118A) that the detection signal is not output from the first photosensor 118A (S18: NO). In this case, the passage of sensor light is not detected in either the first photosensor 118A or the second photosensor 118B. That is, any sensor light is shielded by the optical disk D. Therefore, in this processing step S19, it is determined that a normal disk has been inserted.

[S20 in FIG. 4 (Emission Control of Third Photosensor 120)]
In this processing step S20, the light emission adjusting unit 128 sets the intensity of the sensor light emitted from the light emitting unit 120e of the third photosensor 120 to the normal intensity (for example, the same intensity as the sensor light of the first photosensor 118A). The light emission control of the third photosensor 120 is started. Thereby, the processing of this flowchart is completed, and then the optical disk D is loaded by the loading device 122.

[S21 in FIG. 4 (Determination of Translucent Disc)]
This process step S21 is executed when it is determined in process step S18 (determination of the first photosensor 118A) that a detection signal is output from the first photosensor 118A (S18: YES). In this case, the passage of high intensity sensor light (sensor light of the first photosensor 118A) is detected, and the passage of low intensity sensor light (sensor light of the second photosensor 118B) is not detected. That is, only the sensor light having a low intensity is shielded by the optical disc D. For this reason, in this processing step S19, it is determined that a translucent disc has been inserted.

[S22 in FIG. 4 (Emission Control of Third Photosensor 120)]
In this processing step S22, the light emission adjusting unit 128 sets the intensity of the sensor light emitted from the light emitting unit 120e of the third photosensor 120 to a low intensity (for example, the same intensity as the sensor light of the second photosensor 118B). The light emission control of the third photosensor 120 is started. Thereby, the processing of this flowchart is completed, and then the optical disk D is loaded by the loading device 122.

  In the pre-loading process shown in this flowchart, since the optical disk D inserted into the slot 150a is reliably recognized based on the detection results of the first photosensor 118A and the second photosensor 118B, the optical disk D is a normal disk. Even if it is a translucent disc, loading by the loading device 122 starts correctly. In addition, after the optical disc D is loaded, if no light passing through the sensor light is detected in any of the first photosensor 118A, the second photosensor 118B, and the third photosensor 120, it is determined that the optical disc D is 12 cm in size. . If the passage of sensor light is not detected only by the third photosensor 120, it is determined that the optical disc D is 8 cm in size.

  Next, an ejection / reinsertion determination process executed when the user presses the EJECT button of the key input device 204 will be described. FIG. 5 is a flowchart of the ejection / reinsertion determination process executed by the system control unit 116.

[S31 in FIG. 5 (Discharging the Optical Disc D)]
In this processing step S31, a discharge mechanism (not shown) is operated by pressing the EJECT button as a trigger. As a result, the optical disk D is moved to the position indicated by the broken line in FIG. 3 (in other words, the position where the sensor light of the third photosensor 120 is not shielded by the optical disk D), and more than half of the entire optical disk D is external from the slot 150a. To be discharged. Hereinafter, for convenience of explanation, the position of the optical disc D indicated by the broken line in FIG.

[S32 in FIG. 5 (Determination of Change in Detection Signal of Second Photosensor 118B)]
When the optical disc D is in the middle of ejection, the second photosensor 118B blocks the sensor light by the optical disc D regardless of whether the optical disc D is a normal disc or a translucent disc. Therefore, the detection signal is not output from the second photosensor 118B. In this process step S32, it is determined whether or not the state has changed to a state in which a detection signal is output from the second photosensor 118B.

  For example, when the user picks up and picks up the optical disk D in the middle of ejection, the sensor light of the second photosensor 118B is not blocked by the optical disk D. Therefore, in this process step S32, it determines with having changed into the state in which a detection signal is output from the 2nd photosensor 118B (S32: YES). Since the optical disk D has been completely ejected, the processing of this flowchart ends.

[S33 in FIG. 5 (Determination of Change in Detection Signal of Third Photosensor 120)]
This processing step S33 is performed when it is determined in the processing step S32 (determination of change in the detection signal of the second photosensor 118B) that the detection signal is not output from the second photosensor 118B (S32: NO). Here, when the optical disk D is in the middle of ejection, the sensor light is not shielded by the optical disk D in the third photosensor 120. Therefore, a detection signal is output from the third photosensor 120.

  In this processing step S33, it is determined whether or not the third photosensor 120 has changed to a state in which no detection signal is output. When it is determined in this processing step S33 that the detection signal has not been output from the third photosensor 120 (S33: NO), the processing of this flowchart is performed in processing step S32 (second photosensor 118B). Return to detection signal change determination.

[S34 in FIG. 5 (detection of reinsertion)]
This processing step S34 is executed when it is determined in the processing step S33 that the detection signal is not output from the third photosensor 120 (S33: YES).

  Specifically, when the user manually pushes the optical disc D in the middle of ejection to reinsert it, a part of the optical disc D (the tip portion on the insertion side) becomes the light emitting unit 120e and the light receiving unit 120r of the third photosensor 120. Get in between. Here, the intensity of the sensor light of the third photosensor 120 is set to a normal intensity when the optical disk D is a normal disk by executing the pre-loading process shown in FIG. 4, and the optical disk D is translucent. In the case of a disc, the strength is set to be weak. For this reason, when the optical disc D enters between the light emitting portion 120e and the light receiving portion 120r of the third photosensor 120, the sensor light is reliably shielded even when the optical disc D is a translucent disc.

  Therefore, when the user pushes the optical disc D in the middle of ejecting by hand to reinsert it, in the processing step S33, regardless of the type of the optical disc D, the third photo sensor 120 changes to a state where no detection signal is output. Determination is made (S33: YES).

  In this processing step S34, it is detected that the optical disc D has been reinserted since the passage of the sensor light from the third photosensor 120 is no longer detected.

[S35 in FIG. 5 (reloading)]
In this processing step S35, since the reinsertion of the optical disc D is detected in the processing step S34 (detection of reinsertion), the loading device 122 is driven and controlled. As a result, the re-inserted optical disk D is moved to a position where it is supported by the turntable 124.

  Thus, in the ejection / reinsertion determination process shown in this flowchart, the sensor light of the third photosensor 120 is set to an intensity corresponding to the type of the optical disc D by executing the pre-loading process shown in FIG. Thus, regardless of whether the optical disk D is a normal disk or a translucent disk, it is reliably detected that the detection signal is not output from the third photosensor 120 (that is, reinserted). The Therefore, the re-inserted optical disk is surely loaded regardless of the type of the optical disk.

  The above is the description of the exemplary embodiments of the present invention. Embodiments of the present invention are not limited to those described above, and various modifications are possible within the scope of the technical idea of the present invention. For example, the embodiment of the present application also includes contents appropriately combined with examples and the like clearly shown in the specification or obvious examples.

  In the above-described embodiment, the sensor light of the second photosensor 118B is controlled to emit pulses, but in another embodiment, in addition to this, the sensor light of the first photosensor 118A and the third photosensor 120 is pulsed. You may control light emission.

DESCRIPTION OF SYMBOLS 1 Optical disk reproducing | regenerating apparatus 100 Optical disk processing apparatus 102 Rotation motor 104 Pickup part 104A Pickup 104B Pickup delivery apparatus 104Ba Thread motor 106 Servo control part 108 Rotational speed control part 110 Data decoding part 112 Buffer memory 114 Data transfer part 116 System control part 118A 1st Photosensor 118Ae Light emitting part 118Ar Light receiving part 118B Second photosensor 118Be Light emitting part 118Br Light receiving part 120 Third photosensor 120e Light emitting part 120r Light receiving part 122 Loading device 122a Roller 122b Guide part 124 Turntable 126 Limit switch 128 Light emission adjusting part 150 Enclosure Body 150a slot 200 host computer 202 host CPU
204 Key input device 206 Display unit

Claims (12)

In an optical disk playback device that loads an optical disk based on a detection result by a photosensor,
An insertion slot into which the optical disc is inserted;
A first photosensor capable of detecting that the optical disc has been inserted into the insertion slot;
A second photosensor capable of detecting that the optical disc has been inserted into the insertion port, and having a sensor light intensity emitted from a light emitting unit that is weaker than the first photosensor;
A third photosensor capable of detecting that the optical disc is reinserted into the insertion slot while being ejected from the insertion slot;
A control unit for controlling each of the photosensors;
With
The controller is
Determine the type of the optical disc inserted into the insertion slot based on the detection results of the first and second photosensors,
Setting the intensity of the sensor light of the third photosensor based on the determined type;
Optical disk playback device. The controller is
Based on the detection results of the first and second photosensors, an optical disc inserted into the insertion slot is a regular disc having a layer structure that blocks sensor light emitted from the light emitting portion of each photosensor, or Determine whether the sensor light is a translucent disk having a layer structure that can transmit,
If it is determined that the normal disk, the intensity of the sensor light of the third photo sensor is set to the first intensity,
If it is determined as the translucent disk, the intensity of the sensor light of the third photosensor is set to a second intensity that is shielded by the translucent disk and is weaker than the first intensity.
The optical disk reproducing apparatus according to claim 1. The intensity of the sensor light of the first photosensor is
The intensity of being shielded from light by the normal disk and transmitting through the translucent disk;
The intensity of the sensor light of the second photosensor is
The intensity of light shielding by the normal disk and the translucent disk;
The controller is
If the first and second photosensors cannot detect the passage of the sensor light, it is determined that the normal disk has been inserted,
If the light passage of the sensor light cannot be detected only by the second photosensor among the first and second photosensors, it is determined that the translucent disk is inserted.
The optical disk reproducing device according to claim 2. The controller is
Pulse emission control is performed on at least one light emitting portion of the first photosensor and the second photosensor.
The optical disk reproducing device according to any one of claims 1 to 3. The controller is
When a detection signal other than the pulse detection signal is output from the photosensor under pulse emission control, a predetermined error processing is performed.
The optical disk reproducing device according to claim 4. With a display,
The predetermined error handling is as follows:
A process of displaying an error message on the display unit;
The optical disk reproducing apparatus according to claim 5. Based on the detection result of the first photosensor disposed in the vicinity of the insertion port of the optical disk reproducing device and the second photosensor whose intensity of the sensor light emitted from the light emitting unit is weaker than that of the first photosensor. A determination step of determining the type of the optical disc inserted into the mouth;
Based on the determined type, a setting step for setting the intensity of the sensor light of the third photosensor arranged at a position closer to the rotation center of the optical disc than the first and second photosensors;
including,
Optical disc playback method. In the determination step,
Based on the detection results of the first and second photosensors, an optical disc inserted into the insertion slot is a regular disc having a layer structure that blocks sensor light emitted from the light emitting portion of each photosensor, or Determine whether the sensor light is a translucent disk having a layer structure that can transmit,
In the setting step,
If it is determined that the normal disk in the determination step, the intensity of the sensor light of the third photosensor is set to a first intensity,
If the determination step determines that the disk is a semi-transparent disk, the intensity of the sensor light of the third photosensor is blocked by the semi-transparent disk, and the second intensity is weaker than the first intensity. Set,
The optical disk reproducing method according to claim 7. The intensity of the sensor light of the first photosensor is
The intensity of being shielded from light by the normal disk and transmitting through the translucent disk;
The intensity of the sensor light of the second photosensor is
The intensity of light shielding by the normal disk and the translucent disk;
In the determination step,
If the first and second photosensors cannot detect the passage of the sensor light, it is determined that the normal disk has been inserted,
If the light passage of the sensor light cannot be detected only by the second photosensor among the first and second photosensors, it is determined that the translucent disk is inserted.
The optical disk reproducing method according to claim 8. Pulse emission control is performed on at least one light emitting portion of the first photosensor and the second photosensor.
The optical disc reproducing method according to any one of claims 7 to 9. Determining whether or not a pulse-like detection signal is output for a certain period of time from a photosensor under pulse emission control; and
A step of performing predetermined error processing when it is determined that a pulse-shaped detection signal is not output for a certain period of time;
Further including
The optical disk reproducing method according to claim 10. The predetermined error handling is as follows:
A process of displaying an error message on the display unit;
The optical disk reproducing method according to claim 11.

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