KR100229805B1 - Tape loading controlling device and method for video cassette recorder - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape loading control system of a video cassette recorder, and more particularly, to a tape loading control device of a video cassette recorder for selectively controlling tape loading and ejection modes according to the type of incident light; It is about a method.

To this end, the present invention provides a tape loading control device of a video cassette recorder for selectively controlling an eject mode and a tape loading during tape loading, comprising: a first sensor unit for providing a detection result signal when a frequency in an infrared region is detected; A second sensor unit which provides a detection result signal when a frequency of the visible light region is detected; When the sensing result signals provided by the first sensor unit and the second sensor unit are compared, the tape loading is maintained when the sensing result signals of the first sensor unit and the second sensor unit are provided, and when the sensing result signals of the first sensor unit are provided. A microcomputer providing a deck control signal for driving the eject mode; And a deck unit for selectively driving the tape in the tape loading or eject mode according to the deck control signal provided by the microcomputer, thereby preventing malfunction of the video cassette recorder generated when the visible light is incident. .

Description

Apparatus and method for controlling tape loading of video cassette recorder

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape loading control system of a video cassette recorder, and more particularly, to a tape loading control device of a video cassette recorder for selectively controlling tape loading and ejection modes according to the type of incident light; It is about a method.

In general, a video cassette recorder has a function of reproducing a signal or tape recording a signal recorded on a tape traveling along a certain traveling path of a traveling system.

In order to perform the main function of the video cassette recorder, the video tape is loaded through a loading process in which the head drum in the deck is loaded. This tape loading process is performed by the user. When inserted, the tape is removed from the cassette and attached to the mechanism of the driving system.The VHS (Video Home System) method adopts the M method in which the tape is in the shape of M when viewed from above. do.

That is, the tape loading is wound on the head drum (HD) only during recording and playback, and the loading is released in the fast forward mode (FF) or the fast reverse mode (REW: Rewind). There is a sensing device at the beginning and the end, END sensor and START sensor. By using this, it detects the position of the winding start and end of the tape and automatically stops the tape to protect the tape or mechanism.

At this time, when the tape is loaded while driving in the recording mode and the reproducing mode (M), that is, when the leader tape appears, the tape stops and the pinch roller and capstan (not shown) pull the tape. This will damage the tape. Therefore, when the leader tape appears, the END sensor composed of a port transistor passes through the light emitted from the light emitting sensor and increases the current of the port transistor. Thus, the end of the tape is detected and the tape is stopped. Therefore, the FF mode detects the end of the tape and stops the tape to prevent damage to the tape.

In addition, the START sensor on the right side of the cassette and composed of phototransistors such as the above-mentioned END sensor, when rotated to the first part of the tape in the rewind (RWD) mode, causes the tape to be loaded at the end of the tape to damage the tape. There is a defect. Therefore, the START sensor detects the first part of the tape and stops running of the tape because the light of the first part of the tape, that is, the leader tape, passes through the light emitted from the light emitting sensor and increases the current of the port transistor. Therefore, it prevents the tape from being damaged during RWD.

As described above, the START sensor and the END sensor detect light emitted from the light emitting sensor, that is, infrared rays, and detect the beginning and end portions of the tape. There was a problem of performing a malfunction to eject.

The present invention has been made to solve the above-mentioned, the object of the present invention is to provide a sensor for distinguishing the infrared rays and the sun rays to detect the tape loading by separating the infrared rays and the sun rays, Disclosed is a tape loading control apparatus and method for a video cassette recorder for preventing a malfunction that occurs.

A feature of the present invention for achieving the above object is a tape loading control apparatus of a video cassette recorder for selectively controlling the eject mode and the tape loading during tape loading, which provides a detection result signal when a frequency in the infrared region is detected. A first sensor unit; A second sensor unit which provides a detection result signal when a frequency of the visible light region is detected; Comparing the sensing result signals provided from the first sensor unit and the second sensor unit, if the sensing result signals of the first sensor unit and the second sensor unit are provided, the tape loading is maintained and the first sensor unit is maintained. A microcomputer providing a deck control signal for driving the eject mode when a detection result signal is provided; And a deck unit for selectively driving the tape in the tape loading or eject mode according to the deck control signal provided by the microcomputer.

Another feature of the present invention for achieving the above object is a tape loading control method of a video cassette recorder for selectively controlling the eject mode and the tape loading when loading the tape, the frequency of the incident light when the tape is in the loading mode Detecting light rays; A tape loading maintenance step of maintaining the tape loading when the frequency region of the detected light rays is an infrared ray region and a visible ray region; And an eject mode driving step of driving in the eject mode if the frequency region of the detected light beam is an infrared region.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.

1 is a block diagram showing the configuration of a tape loading control apparatus of a video cassette recorder according to a preferred embodiment of the present invention.

2 is a flowchart for performing a tape loading control method of a video cassette recorder according to an embodiment of the present invention.

<Description of the code | symbol about the principal part of drawing>

10: sensor unit 20: micom

30: deck

Hereinafter, with reference to the accompanying drawings will be described in detail the operation of the preferred embodiment according to the present invention.

1 is a block diagram showing a configuration of an apparatus for controlling a tape loading of a video cassette recorder according to the present invention, which detects infrared rays and detects visible light and a first sensor unit 1 that provides a signal for the detection result. A second sensor unit 1 providing a signal for the detection result, a microcomputer 20 comparing the detection signals provided from the first and second sensor units 2 and providing a deck control signal for the comparison result; The deck unit 30 operates in a driving mode according to the deck control signal provided by the microcomputer 20.

The operation of the tape loading control device of the video cassette recorder according to the present invention configured as described above is as follows.

The first sensor unit 1 senses the frequency of the infrared region and provides a control signal for the result to the microcomputer 20, wherein the infrared wavelength of the radiation consisting of infrared rays, visible rays, ultraviolet rays is red It is longer than the visible light, and detects the frequency of the infrared region and provides a logic signal for the detection result to the microcomputer 20.

The second sensor unit 2 senses the frequency of the visible light region and provides a control signal for the result to the microcomputer 20. The visible light is an electromagnetic wave having a wavelength of 380 µm to 780 µm, When a frequency for the visible light region is detected as a frequency region that is visible to the user and is displayed in different colors according to the wavelength, a logic signal for the result is provided to the microcomputer 20.

At this time, the detailed description of the operation of the first sensor unit 1 and the second sensor unit 2 will be omitted since those skilled in the art can easily understand.

Accordingly, the microcomputer 20 provides the deck control signal to the deck unit 30 according to the sensing result signals provided from the first and second sensor units 1 and 2. That is, the microcomputer 20 provides a deck control signal for maintaining the tape loading state of the deck unit 30 when a result signal for detecting an infrared region and a result signal for detecting an visible region are provided by the sensor unit 10. In addition, when an infrared detection result signal is provided from the sensor unit 10, a control signal for driving the deck unit 30 in an eject mode is provided.

At this time, the deck unit 30 maintains the tape loading state when the deck control signal provided from the microcomputer 20, that is, the tape loading state maintenance control signal, is loaded when the control signal for driving in the eject mode is provided. Eject the tape.

2 is a flowchart for performing a tape loading control method of a video cassette recorder according to the present invention, which will be described in detail with reference to the block diagram shown in FIG.

If the deck unit 30 is in the tape loading mode, the microcomputer 20 proceeds to step 210 and determines whether the light beam 1m is incident. That is, the sensor unit 10 provides the microcomputer 20 with a logic signal according to the result of determining and determining the type of the incident light beam 1m.

That is, the sensor unit 10 may provide a detection signal, that is, a high level logic signal to the microcomputer 20 when the detected light beam 1m detects a frequency of the infrared region 1 _R , and detects the light beam 1 1 m) provides a low level logic signal to the microcomputer 20 when the frequency of the visible light region 1 _V is sensed.

At this time, those skilled in the art will readily understand that the logic signal provided from the sensor unit 10 to the microcomputer 20 may be set differently in system design.

Therefore, if the logic signal provided from the sensor unit 10 is the high level logic signal, that is, the frequency region of the incident light beam 1m is the frequency with respect to the infrared region 1 _R , the microcomputer 20 proceeds to step 220. the procedure proceeds to step 230, the frequency domain of the incident beam (1m) or a frequency for the infrared region (1 _R) maintains the tape load mode.

At this time, the microcomputer 20 proceeds to step 230 and determines whether the frequency of the low-level logic signal, that is, the frequency region of the incident light beam 1m, is incident from the sensor unit 10.

As a result of determination, when the detection signal for the infrared region 1 _R and the detection signal for the visible light region 1 _V are provided from the sensor unit 10, the microcomputer 20 proceeds to step 240 and the deck unit 30 is performed. ) In the current state, i.e., tape loading mode.

At this time, the microcomputer 20 determines that the signal detected by the sensor unit 10 in step 230 is not a signal for the visible light region 1 _V or a signal for the infrared region 1 _R. Proceeds to drive the deck unit 30 in the eject mode.

As described above, the apparatus and method for controlling the tape loading of a video cassette recorder according to the present invention maintains the tape loading mode when the frequency of the infrared region and the visible light is detected when the tape is loaded in the deck, and the frequency of the infrared region. If only the detected tape is ejected, there is an effect that can prevent the malfunction of the video cassette recorder generated when the light incident.

While the invention has been shown and described with respect to certain preferred embodiments, it will be apparent to those skilled in the art that various modifications, changes and omissions can be made without departing from the spirit and scope of the invention.

Claims (2)

A tape loading control device of a video cassette recorder for selectively controlling the eject mode and the tape loading upon tape loading, A first sensor unit configured to provide a detection result signal when a frequency of the infrared region is detected; A second sensor unit which provides a detection result signal when a frequency of the visible light region is detected; Comparing the sensing result signals provided from the first sensor unit and the second sensor unit, if the sensing result signals of the first sensor unit and the second sensor unit are provided, the tape loading is maintained and the first sensor unit is maintained. A microcomputer providing a deck control signal for driving the eject mode when a detection result signal is provided; And And a deck unit configured to selectively drive the tape in tape eject or eject mode in accordance with a deck control signal provided by the microcomputer. A tape loading control method of a video cassette recorder for selectively controlling an eject mode and a tape loading during tape loading, A ray sensing step of sensing a frequency of an incident ray when the tape is in a loading mode; A tape loading maintenance step of maintaining the tape loading when the frequency region of the detected light rays is an infrared ray region and a visible ray region; And And an eject mode driving step of driving in the eject mode if the frequency region of the detected light beam is an infrared region.