KR940009466B1 - Video cassette tape player - Google Patents

Abstract

The device includes a play back switch and a MICOM for controlling the play-back operation, wherein the device includes a prohibitionary switch for prohibiting a youth from playing back a cassette for an adult; a lamp driving part for detecting a predetermined light signal on the portion where a label of the video cassette tape irradialed by a user; a color sensing part for outputting a predetermined level of sensing signal by determining the color of the label on the basis of the light signal; and a function controlling part for prohibiting the play back operation of the video cassette tape by the MICOM according to the sensing-results.

Description

Certain video cassette tape players

1 is a block diagram of the present invention.

2A and 2B are explanatory diagrams of a VCR to which the small lamp FL1 and the monochromatic sensor CG1 of the present invention are attached.

3 is a detailed circuit diagram of the present invention.

4 is a functional table of flip-flops used in the present invention.

* Explanation of symbols for main parts of the drawings

1: Deck Main Base 2: Cylinder

3: front loading section 4: pro tape

5: Tape attachment label 6: Green stripe or blue stripe

10: switch unit 20: lamp driving unit

30: color detection unit 40: VCR operation control unit

50: lamp auto-off control unit 60: function release control unit

70: function control unit FC1: small lamp

CG1: Monochromatic sensor A1, A2: OP amplifier

S1: switch

R1 to R13, R15 to R17, R18 ', R19': resistance

C1, C2: capacitors D1 to D5, D6 'to D9': diodes

FR1: flip-flops Q1 to Q6, Q7 ', Q8': transistor

The present invention relates to a device for reproducing a specific video cassette tape, in which illegal or adult pro tapes, which may adversely affect the growth of adolescents, are not reproduced in a home where a VCR is spread, but only teen tapes are reproduced. will be.

As is well known, the pro tape has a green stripe or a blue stripe (hereinafter referred to as a green stripe only) on one side of a label to which a youth tape is attached, and a red stripe in the case of an adult, and thus is a criterion for determining this.

In general, however, when playing a video cassette tape (abbreviated as tape) and watching it on a VCR, it is possible to play it regardless of whether it is genuine or furnishings. Watching adult protape freely can lead to terrible mental illnesses that damage youth's mental health and even cause social controversy.

The present invention has been made to solve the above problems, when the switch unit of the present invention "on" the sense of the color strip to distinguish the label for the adult and youth tape to be reproduced in the VCR only when green and other In other words, in the case of genuine adult and illegal tapes, the tapes are automatically ejected so that adolescents can not watch any tape but can only watch the youth tape, thereby contributing to the mental health of adolescents.

A specific video cassette tape reproducing apparatus according to the present invention for realizing the above object is a video cassette tape reproducing apparatus having a reproducing switch for reproducing a video tape and a microcomputer for controlling the reproducing operation of the apparatus in accordance with the selection of the reproducing switch. And a prohibition switch 10 for prohibiting reproduction of an adult video tape by a teenager, a lamp driver 20 for irradiating a predetermined optical signal to a labeling portion of a video tape fed by a user, and an attachment to the video tape. A color detector 30 for discriminating the color of the label based on the optical signal reflected from the label, and outputting a detection signal having a predetermined level, and when the prohibition switch is selected, according to the detection result by the color detector. And a function controller 70 for prohibiting the playback operation of the video tape by the microcomputer. Characterized in that configured.

Looking at the operation and effect of the present invention having the above configuration is as follows.

First, the switch unit 10 for driving the present invention may be a mechanical or electronic alternatively used for a mechanical “switch on” method using a separate key, and the electronics may have a number of “0” to “9”. By using a button key, a secret code is memorized in a microcomputer (not shown), and is only turned on when the code is entered.

Meanwhile, as shown in FIG. 2, since the circuit of the present invention is used inside the VCR, separate lighting is required.

Therefore, the tape 4 is attached by attaching a small lamp FL1 (or a similar light source) and a monochromatic sensor CS1 to the top plate fixed portion of the front loading part 3 installed on the VCR deck mechanically. If so, the green strip (6) can be detected.

Referring to this in more detail with respect to the operation of each part according to FIG. 3, the circuit must operate the switch S1 so that the small lamp FL1 is operated so that the switch S1 is not operated. By opening the transistor Q4 emitter of 70, diode D5 and transistor Q6 are " turned off ", thus stopping the function of the present invention.

When the operation state of the small lamp FL1 is explained, when the switch S1 is in the "on" state and the tape is fed in, the CST DOWN (H) end is in the "high" level state. The transistor Q1 is " turned on " and the power supply B + is applied to the small lamp FL1 to be turned on by biasing through the R3 and the diode D1.

However, even if the switch S1 is in the " on " state, when no tape is inserted, the CST DOWN (H) end is in the " low " level state, so that the diode D2 is turned on so that the transistor Q1 is turned on. "Turn off" so that the small lamp FL1 remains in a disturbed state.

When the small lamp FL1 of the lamp driving unit 20 is turned on and the inserted tape is a youth tape, the monochromatic sensor CS1 detects the green color and flows a current.

This current flows through the resistor R7 to generate a voltage which is amplified by being applied to the "-" terminal of the OP amplifier A1.

In this case, the sensitivity of the monochromatic sensor CS1 may be adjusted by selecting the resistor VR1.

The signal amplified by the OP amplifier A1 is applied to the "+" terminal of the OP amplifier A2. In order to prevent the malfunction caused by the dark current of the monochromatic sensor CS1 or the malfunction caused by the noise light source, the signal of the OP amplifier A2 is Since the power supply B + is divided and applied to the resistors R10 and R11 to the "-" terminal, the magnitude of the signal applied to the "+" terminal of the OP amplifier A2 is measured. Adjust with the variable resistor VR1 so as to be abnormal.

Therefore, the OP amplifier A2 outputs a "high" level signal when the monochromatic sensor CS1 detects the green band of the tape label, and outputs a "low" level signal when other colors are detected.

The signal output as described above is input to the function controller 70 to perform the function of the present invention.

As shown in FIG. 1, the function control unit 70 includes a VCR operation control unit 40, a lamp auto-off control unit 50, and a function deactivation control unit 60 to operate.

First, in the VCR controller 40, when the switch S1 is turned "on", the emitter terminal of the transistor Q4 is grounded, and the circuit of the present invention is operable.

At this time, when the youth tape is input, the output of the OP lamp A2 of the color sensing unit 30 becomes a "high" level state and is applied to the transistor Q3 base through the resistor R13, and the transistor Q3 is "turned on". This causes transistor Q4 to be " turned off ".

Thus, the collector of transistor Q4 is in the "high" level state, so transistor Q6 is "turned off" and both ends of the stop key of the VCR are opened to enable tape playback.

However, if the inserted tape is not for youth, transistor Q3 is " turned off " so that the VCR (A2) output of color sensing unit 30 is in the " low " level whereby it is applied to the collector of transistor Q3. The " high " level state " turns on " transistor Q4, thereby turning transistor Q6 " turn on ".

Thus, current flows across the VCR's stop key, which keeps the VCR in a stopped state.

Therefore, the tape becomes impossible to play and will be ejected or held in a stop state when the play key is pressed according to the program of a microcomputer (not shown) used in the VCR.

That is, in a VCR programmed to eject the tape when two keys are operated simultaneously in the microcomputer, when the play key is pressed, the stop key is already pressed, that is, the transistor Q6 of the present invention is "turned on", so the tape is ejected immediately. Will be.

However, in a VCR that is not programmed to eject tape even if two keys are operated at the same time, the circuit shown by the dotted line in the function control unit 70 of the present invention is forced to eject the tape forcibly while the stop key is pressed. Just add

The operation state thereof is as follows.

When a tape other than the youth is inserted, the output of the OP amplifier A2 of the color sensing unit 30 is in the "low" level state, so that the transistor Q3 is "turned off" and the collector of the transistor Q3 is "high". You are in a level state.

Therefore, when the clock terminal CLK of the flip-flop FR1 gradually becomes the "high" level state by the time constants of the resistor R6 and the capacitor C2, the output terminal Q, of the flip-flop FR1, ) Is inverted with a delay by the time constant.

Accordingly, the function table of the flip-flop FR1 is shown in FIG.

That is, the state of the output terminal Q of the frill flop FR1 is inverted from the "low" level state to the "high" level state to "turn on" the transistor Q7 'through the diode D7'.

Therefore, the collector of the transistor Q7 'is brought into the "low" level state, whereby the transistor Q8' is "turned on" so that the eject key of the VCR is pressed.

In addition, the diode D9 'is also conducting so that the collector of transistor Q3 is in the "low" level state, whereby transistor Q4 is "turned off" and the collector of transistor Q4 is in the "high" level state. Transistor Q6 is " turned off " to release the stop key pressed state.

Therefore, the inserted tape is automatically ejected.

In the lamp automatic extinguishing control section 50, the operation state thereof will be described. When the tape S which is not for the youth is fed in the state in which the switch S1 is "on", the output of the OP amplifier A2 of the color sensing unit 30 is " Low level state.

Therefore, transistor Q3 is " turned off " and collector of transistor Q3 is in a " high " level state so that the function of flip-flop FR1 becomes as described above.

Therefore, the output terminal Q of the flip-flop FR1 shown in FIG. 4 becomes a "low" level state from the "high" level state.

Therefore, the diode D3 is turned on, the base end of the transistor Q1 is "low" level to "turn off" and the lamp FL1 is "off".

On the other hand, if the tape is ejected while the switch S1 is "on", the transistor Q2 is "turned off" because the CST DOWN (H) stage is in the "low" level state, thereby clearing the flip-flop FR1 ( CLR) terminal becomes "low", so the flip-flop FR1 function resets the PR terminal PR of the flip-flop FR1 to the "high" level state and the clear terminal CLR to the "low" level state. do.

That is, the flip-flop FR1 is reset every time the tape is ejected while the switch S1 is turned on.

Finally, in the deactivation control unit 60 of the function control unit 70, even if the switch S1 is in the operating state, the tape can be recorded without being ejected when the recording tape is inserted.

Specifically, as shown in FIG. 3, the REC INH (L) terminal is “low” when a playback tape is inserted into the VCR or a tape is not inserted under the control of a microcomputer (not shown). In the "level" state, when the recording tape is input, the state becomes a "high" level state.

At this time, when the recording tape is input, it is applied to the non-inverting terminal (+) of the OP amplifier A2 through the diode D4 so that the output of the OP amplifier A2 is in a "high" level state.

Therefore, according to the above description, the transistor Q3 is "turned on" and the transistor Q4 is turned "turned off", and the transistor Q6 is turned "turned off" so that the stop key pressed state is released.

The transistor Q5 is also " turned on " so that the PR terminal PR of the flip-flop FR1 is in the "low" level state, and the clear terminal CLR is in the "high" level state, as shown in FIG. According to the function table of the flip-flop FR1, the output terminals Q, ) Is inverted, that is, from the "high" state to the "low" level state, thereby turning off the lamp FL1 as described above.

Here, briefly explaining how the clear terminal CLR of the flip-flop FR1 becomes the "high" level state, since the tape is mounted, the emitter of the transistor Q2 is in the "high" level state and the switch S1 is operated. Therefore, the base of the transistor Q2 is in the "low" level state, and the transistor Q2 is in the "turn-on" state, and the collector terminal thereof is in the "high" level state, and thus the clear terminal CLR of the flip-flop FR1. ), A "high" level signal is applied.

In addition, if a circuit (a circuit shown by a dotted line) for automatic ejection is connected to the output terminal Q of the flip-flop FR1, it is necessary to stop it.

To explain the operation, since the collector of transistor Q5 is in the "low" level state, diode D6 'is turned on so that transistor Q7' is "turned off" and thereby transistor Q8 'is "turned off". This prevents the tape from ejecting.

In this way, the present invention is provided to contribute to the mental health of adolescents by allowing adolescents to not watch illegal or adult tapes at will and to selectively watch only the adolescent tapes when they go out.

Claims (8)

A video cassette tape playback device having a playback switch for playing back a video tape and a microcomputer that controls the playback operation of the device in accordance with the selection of the playback switch, comprising: a prohibition switch for prohibiting playback of an adult video tape by adolescents (10) ) And a lamp driver 20 for irradiating a predetermined optical signal to the labeling portion of the video tape supplied by the user, and determining the color of the label based on the optical signal reflected from the label attached to the video tape. A color detection unit 30 for outputting a detection signal of a predetermined level, and a function control unit 70 for prohibiting the playback operation of the video tape by the microcomputer according to the detection result by the color detection unit when the prohibition switch is selected. Specific video cassette tape playback device characterized in that it comprises a). 2. A specific video cassette tape playback device according to claim 1, wherein the switch section (10) can be used either mechanically or electronically. 2. The specific video cassette tape reproducing apparatus according to claim 1, wherein the lamp driver (20) comprises a small lamp (FL1), a transistor (Q1), a diode (D1, D2) and a resistor (R3). The method of claim 1, wherein the color detector 30 is composed of a monochromatic sensor (CS1), resistors (R7-R12), variable resistor (VR1) and capacitor (C1) and OP amplifiers (A1, A2) Certain video cassette tape playback devices. The method of claim 1, wherein the function control unit 70 and the VCR operation control unit 40 for driving control of the playback stop key according to the detection result of the color detection unit 30, and when the label color discrimination operation of the inserted tape is finished And a lamp automatic extinguishing controller 50 for turning off the lamp by controlling the lamp driving unit, and a function releasing control unit 60 for releasing the sorting / playing function when a recording tape is input. Tape player. 6. The VCR operation control unit 40 includes resistors R13, R15, R18 ', and R19' diodes D5, D6, D6 '-D9', and transistors Q3, Q6, Q7 ', Q8'. A specific video cassette tape playback device, characterized in that consisting of. 6. The specific video cassette tape according to claim 5, wherein the lamp automatic extinguishing control section (50) is composed of resistors (R1, R2, R4 to R6, R17), diode (D3) capacitor (C2) and flip-flop (FR1). Playback device. 6. The specific video cassette tape reproducing apparatus according to claim 5, wherein the deactivation controller (60) comprises a diode (D4), a resistor (R16) and a transistor (Q5).