US 7,069,565 B2Granted

Disk identifying device

AssigneeFunai Electric Co., Ltd.

InventorShintaro Hirano

Life of this patent

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Abstract

In a disk identifying device, when a slanting reflecting face is irradiated with light emitted from a light emitting element while a rotary tray is rotating, most of the light reflected from the slanting reflecting face is not incident on a light receiving element, whereas when a flat reflecting face is irradiated with the light emitted from the light emitting element, most of the reflected light is incident on the light receiving element. Since the receiving element receives the reflected light in a pattern corresponding to an assigned number of a pertinent disk placing portion, the rotary position of the rotary tray is detected. Where a disk detecting hole is irradiated with the light emitted from the light emitting element, the presence or absence of a disk on the pertinent disk placing portion is detected by the presence or absence of the reflected light received by the light receiving element.

Claims8

Dependent claims

A disk identifying device comprising:

a rotary tray having a plurality of disk placing portions on each of which a disk as a recording medium is to be placed and each of which has an assigned number;
a belt-like portion concentrically formed on a rear surface of the rotary tray, the belt-like portion having disk detecting holes each corresponding to a position of each of the disk placing portions, and reflecting areas each formed between adjacent disk detecting holes and including slanting reflecting faces and flat reflecting faces which are divisionally arranged so that their arrangement patterns are different for each of the assigned numbers of the disk placing portions;
a light emitting element provided behind the rear surface of the rotary tray for emitting light toward the belt-like portion;
a light receiving element provided behind the rear surface of the rotary tray for receiving light reflected from the belt-like portion;
and
a controller;
wherein the controller, in accordance with a disk number designating signal, determines whether or not the disk is placed on a pertinent disk placing portion according to whether or not the light receiving element receives light reflected through the disk detecting hole while rotating the rotary tray and emitting light from the light emitting element, identifies the assigned number of the pertinent disk placing portion in such a manner that the light receiving element receives patterned light reflected from the reflecting area and corresponding to the arrangement pattern, and stops rotation of the rotary tray to stop the pertinent disk placing portion at a prescribed position.

4 more elements

A disk identifying device comprising:

a rotary tray having a plurality of disk placing portions on each of which a disk as a recording medium is to be placed and each of which has an assigned number;
a belt-like portion concentrically formed on a rear surface of the rotary tray, the belt-like portion having disk presence/absence detecting areas each for detecting the presence/absence of the disk on each of the disk placing portions on the basis of reflected light, and reflected light pattern forming areas each for identifying a position of a pertinent disk placing portion;
wherein the disk presence/absence detecting areas comprise disk detecting holes corresponding to positions of the disk placing portions, and
the reflected light pattern forming areas comprise reflecting areas each formed between adjacent disk detecting holes and including slanting reflecting faces and flat reflecting faces which are divisionally arranged so that their arrangement patterns are different for each of the assigned numbers of the disk placing portions;
a light emitting element provided behind the rear surface of the rotary tray for emitting light toward the belt-like portion;
and
a light receiving element provided behind the rear surface of the rotary tray for receiving light reflected from the belt-like portion.

4 more elements

A disk identifying device comprising:

a rotary tray having a plurality of disk placing portions on each of which a disk as a recording medium is to be placed and each of which has an assigned number;
a belt-like portion concentrically formed on a rear surface of the rotary tray, the belt-like portion having disk presence/absence detecting areas each for detecting the presence/absence of the disk on each of the disk placing portions on the basis of reflected light, and reflected light pattern forming areas each for identifying a position of a pertinent disk placing portion;
wherein the disk presence/absence detecting areas comprise disk detecting holes corresponding to positions of the disk placing portions, and
the reflected light pattern forming areas comprise light-receiving areas each formed between adjacent disk detecting holes and including light-absorptive color light-receiving faces and light-reflective color light-receiving faces which are divisionally arranged so that their arrangement patterns are different for each of the assigned numbers of the disk placing portions;
a light emitting element provided behind the rear surface of the rotary tray for emitting light toward the belt-like portion;
and
a light receiving element provided behind the rear surface of the rotary tray for receiving light reflected from the belt-like portion.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/694,218Filed 28 Oct 2003
Priority: JP P2002-31460929 Oct 2002
Published: US 2004/0139454 A115 Jul 2004
Granted: 27 Jun 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

G11B 17/226
From random access magazine of disc records: the magazine consisting of a single rotatable tray carrying the disks
G11B 17/228
From random access magazine of disc records: control systems for magazines
G11B 19/10
Control of operating function, e.g. switching from recording to reproducing: by sensing presence or absence of record in accessible stored…
G11B
Information storage based on relative movement between record carrier and transducer