JP2730205B2 - Optical disk cleaning alarm - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting a deterioration of a reproduction signal due to an adhered substance at the time of access in a magneto-optical disk device or another optical disk device and alarming the cleaning of the optical disk or the device. Related to the device.

2. Description of the Related Art Conventionally, in an optical disc apparatus, signal reproduction is performed using a light spot narrowed down to 1 μm or less. There were few. For this reason,
No special measures have been taken against the deterioration of the reproduction signal due to the attached matter, and when an access error due to the attached matter occurs, the user has cleaned the entire surface of the optical disk, the objective lens, etc. regardless of the position of the attached matter.

Problems to be Solved by the Invention However, the usage environment of the optical disk and the optical disk device is diversified for each user, and the environment where the adhered matter is easily attached is increasing. Therefore, cleaning an optical disk or an objective lens without knowing the position of the attached matter when an access error occurs is not only a poor work efficiency, but also reduces the reliability of the optical disk and the device by cleaning more than necessary. May cause

The present invention is to solve such a conventional problem, and provides an optical disk cleaning alarm device capable of specifying an area where an adhering substance is present, thereby enabling effective alarming of the removal of the adhering substance. With the goal.

Means for Solving the Problems In order to achieve the above object, the present invention detects a deterioration of a reproduction signal caused by an adhering substance at the time of accessing an optical disc, and detects whether the reproduction signal is stationary or at a specific access position. That is, it is determined whether the object is a real one.

According to the present invention, therefore, according to the present invention, when the deterioration of the detected reproduction signal is constant, it can be determined that the portion of the attached matter is on the optical system of the access portion such as the objective lens. Will be cleaned. If the detected reproduction signal is degraded at a specific access position, only that part of the optical disk is cleaned. In this manner, since only the portion where the deposits are present is cleaned, it is possible to improve work efficiency and prevent a decrease in reliability.

Embodiment FIG. 1 shows a configuration of a position embodiment of the present invention. In this embodiment, a case will be described where a still operation such as a retry or a standby at the time of occurrence of an error occurs, that is, the same track is continuously operated and accessed several times. In FIG. 1, reference numeral 1 denotes an access error detecting unit for detecting an access error, which serves as a reproduced signal deterioration detecting unit. This may be a reproduction signal level decrease detection unit that detects a decrease in the reproduction signal level. “a” is an error signal, which is output from the access error detector 1. Reference numeral 2 denotes an optical disk 1 rotation waiting unit, and reference numeral 3 denotes a fall detection unit that detects the fall of the error signal a, and these constitute a first determination unit. b is a reset signal to the optical disk 1 rotation waiting unit 2;
A stationary error signal 4 when the error signal a continues for more than the rotation is an alarm display section. Reference numeral 5 denotes an access position detection unit for detecting an access position (sector; the same applies hereinafter) on the optical disk, and d denotes a signal indicating the access position. Reference numeral 6 denotes an error sector flag table which indicates the presence or absence of a sector error for each access position, e denotes a sector error signal serving as a flag, and 7 denotes a flag processing circuit which performs processing according to the operation table shown in FIG. f, a reset signal g, and a specific sector error signal h. The error sector flag table section 6 and the flag processing circuit section 7 constitute a second determination section.

Next, the operation of the above embodiment will be described with reference to the flow shown in FIG. First, when an access error is detected by the access error detection unit 1 from a state where there is no access error (step 11), the optical disk 1 waits for one rotation according to the signal a. If the falling edge of the error signal a is detected by the falling edge detecting unit 3 during that time, the reset signal b is output from the falling edge detecting unit 3 to reset the one-rotation waiting unit 2 and wait for one rotation again. . If the error signal "a" is continuously detected during one rotation of the optical disk, a steady error state is set (step 12).
An alarm is displayed by light, letters, etc. When this display is made, it is determined that dust or the like has adhered to the optical system. Therefore, the user cleans the lens of the optical system and recovers the error (step 13). Judges that the optical characteristics in the drive are degraded, and replaces parts and the like (step 14).

On the other hand, the access position detector 5 constantly detects the access position on the optical disk, and first outputs a set signal f based on the signal d and the access error signal a.
When the error signal a is output again in the same sector, the specific sector error signal h is output to the alarm display unit 4 to warn the specific sector error (step 15). If the error does not continue twice in the same sector, a reset signal g is output. When a specific sector error is displayed as an alarm, it is determined that dust or the like has adhered to the optical disk. Therefore, the user cleans the track portion of the optical disk and recovers the error (step 16). If the error still cannot be recovered, it is determined that the optical characteristics of the optical disk have deteriorated, and the optical disk is rewritten or replaced with another part (step 17).

As is clear from the above embodiment, the present invention detects the deterioration of the reproduction signal caused by the deposit when accessing the optical disc and specifies the portion where the deposit is present. There is an effect that the minimum required cleaning with good work efficiency can be performed, and a decrease in reliability can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram of an optical disk cleaning alarm device according to an embodiment of the present invention, FIG. 2 is a schematic flowchart showing an operation in the embodiment, and FIG. 3 is a diagram showing criteria for determination operation in the embodiment. . 1 access error detecting section, 2 optical disk one rotation waiting section, 3 falling edge detecting section, 4 alarm display section,
Access position detecting unit on optical disk, 6 ... Error sector flag table unit, 7 ... Flag processing circuit unit, a ...
Access error signal, b ... reset signal, c ... stationary error signal, d ... access position signal, e ... sector error signal, f ... set signal, g ... reset signal,
h ... Specific sector error signal.

Claims (1)

(57) [Claims] 1. A reproduction signal deterioration detection unit for detecting a deterioration of a reproduction signal caused by a deposit when accessing an optical disk, an access position detection unit for detecting an access position at the time of access, and a signal from the reproduction signal deterioration detection unit. A first determination unit for determining whether the reproduction signal is constantly deteriorating,
A second judging unit for judging whether or not the reproduction signal is degraded at a specific access position based on a signal from the reproduction signal deterioration detection unit and a signal from the access position detection unit, and a positive judgment signal from each of the judgment units An optical disk cleaning alarm device, comprising: an alarm display unit for performing an alarm display based on the information.