KR940001201Y1 - Auto-stop circuit at vcr/tv mode transfer for vcr - Google Patents
Auto-stop circuit at vcr/tv mode transfer for vcr Download PDFInfo
- Publication number
- KR940001201Y1 KR940001201Y1 KR2019880019440U KR880019440U KR940001201Y1 KR 940001201 Y1 KR940001201 Y1 KR 940001201Y1 KR 2019880019440 U KR2019880019440 U KR 2019880019440U KR 880019440 U KR880019440 U KR 880019440U KR 940001201 Y1 KR940001201 Y1 KR 940001201Y1
- Authority
- KR
- South Korea
- Prior art keywords
- vcr
- transistor
- mode
- switch
- stop circuit
- Prior art date
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Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/02—Control of operating function, e.g. switching from recording to reproducing
- G11B15/05—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container
- G11B15/087—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container by sensing recorded signals
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/268—Signal distribution or switching
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Studio Circuits (AREA)
Abstract
내용 없음.No content.
Description
제1도는 본 고안의 회로도.1 is a circuit diagram of the present invention.
제2도는 제1도에 따른 타이밍 챠트.2 is a timing chart according to FIG.
제3도는 본 고안의 플로우 챠트이다.3 is a flow chart of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
IC : 마이컴 S1, S2; 스위치IC: microcomputer S 1 , S 2 ; switch
Q1-Q3: 트랜지스터 R1-R6: 저항Q 1 -Q 3 : Transistors R 1 -R 6 : Resistance
본 고안은 VCR/TV모드 전환시 화면 자동 정지 회로에 관한 것으로, 특히 VCR에 재생화면 시청시 TV모드로 전환시킬 때 VCR의 재생화면이 자동으로 정지되게 하므로 TV시청후 다시 VCR의 재생화면을 시청하고자 할때 테이프를 리바인드시키지 않고도 바로 VCR을 시청할 수 있도록 한 것이다.The present invention relates to a screen automatic stop circuit when switching the VCR / TV mode. In particular, the playback screen of the VCR is automatically stopped when switching to the TV mode when watching the playback screen on the VCR. When you want to, you can watch the VCR without rebinding the tape.
종래에는 VCR의 재생화면을 시청하다가 TV를 시청하고자 할때 TV/VCR스위치를 VCR모드에서 TV모드로 전환시키면 실제 화면에는 TV방송 화면이 나오지만 VCR의 플레이 동작은 그대로 진행되고 있어 이와같이 TV를 시청하다가 사용자가 다시 VCR의 재생화면을 시청하고자 할 때에는 테이프를 리바인드시켜 상기의 VCR모드에서 TV모드로 전환시의 테이프의 지점을 탐색해야 하는 사용상의 불편함이 있었다.Conventionally, when watching a playback screen of a VCR, when the TV / VCR switch is switched from the VCR mode to the TV mode, the TV screen is displayed on the actual screen, but the play operation of the VCR is still in progress. When the user wants to watch the playback screen of the VCR again, there is an inconvenience in using the tape rebinding to search for the point of the tape when switching from the VCR mode to the TV mode.
본 고안은 이와 같은 종래의 결점을 감안하여 VCR의 재생화면을 시청하다가 VCR모드에서 TV모드로 전환시킬 경우 VCR의 재생화면이 자동으로 정지되게 하므로 TV모드에서 다시 VCR모드로 전환시켜도 VCR을 바로 시청할 수 있게 한 것으로, 이를 첨부된 도면 제1도 내지 제3도에 의하여 더욱 상세히 설명하면 다음과 같다.In view of the above-described drawbacks, the present invention automatically stops the playback screen of the VCR when switching from the VCR mode to the TV mode while watching the playback screen of the VCR. As described above, it will be described in more detail with reference to FIGS. 1 to 3 as follows.
본 고안은 마이컴(IC)의 입력측에 TV/VCR 전환스위치(S1)를 접속시킴과 아울러 다른 입력측에는 스틸(STILL) 스위치(S2)를 접속시키며, 출력측에는 저항(R4)(R5)을 통하여 트랜지스터(Q3)의 베이스를 접속시킨후 이 트랜지스터(Q3)의 컬렉터에 저항(R3)(R6)을 통하여 컬렉터에 변조기 B+전원단(1)이 접속된 트랜지스터(Q2)의 베이스와 에미터를 접속시킨다.The present invention connects a TV / VCR selector switch (S 1 ) to the input side of the microcomputer (IC), and connects a still switch (S 2 ) to the other input side, and a resistor (R 4 ) (R 5 ) to the output side. Transistor Q 3 connected to the base of transistor Q 3 through a resistor R 3 (R 6 ) to a collector of transistor Q 3 , and a transistor Q + 2 ) Connect the base and emitter.
또한, 상기 마이컴(IC)의 출력측에 공통으로 저항(R1)(R2)을 통하여 컬렉터와 에미터가 스위치(S2)의 양단에 접속된 트랜지스터(Q1)의 베이스를 접속시켜서 구성된 것으로, 도면중 미설명부호 C는 콘덴서, Vcc는 직류전원, 가, 나, 다는 각 점에서의 타이밍 챠트를 설명하기 위한 것이다.In addition, the collector and the emitter are connected to the base of the transistor Q 1 connected to both ends of the switch S 2 through the resistors R 1 and R 2 on the output side of the microcomputer IC. In the drawings, reference numeral C denotes a capacitor, and Vcc denotes a DC power supply.
이와같이 구성된 본 고안은 사용자가 VCR의 재생화면을 시청하다가 전환스위치(S1)를 눌러 TV모드로 전환시키면 마이컴(IC)의 출력측으로 하이레벨이 출력되어 저항(R4)(R5)을 통하여 트랜지스터(Q3)를 온시키고, 이에따라 트랜지스터(Q2)의 베이스에는 로우레벨이 인가되어 트랜지스터(Q2)가 온되므로 컬렉터를 통하여 변조기 B+전원단(1)에 Vcc전원이 인가됨과 동시에 TV화면을 시청 가능하게 된다.According to the present invention configured as described above, when the user watches the playback screen of the VCR and presses the switch (S 1 ) to switch to the TV mode, a high level is output to the output side of the microcomputer (IC) and the resistor R 4 (R 5 ) turns on the transistor (Q 3), yiettara transistor (Q 2), the base is applied to low level, and the transistor (Q 2) is turned on, so soon as the Vcc power supply to the modulator B + power supply terminal 1 via the collector is at the same time TV The screen can be viewed.
또한, 마이컴(IC)에서 출력된 하이레벨은 저항(R1)(R2)을 통하여 랜지스터(Q1)의 베이스에 인가되는데 이때 스위치(S2)를 누르지 않은 상태이므로 컬렉터가 하이레벨이 되어 트랜지스터(Q1)가 온된다.In addition, the high level output from the microcomputer (IC) is a resistor (R 1) (R 2) a there is applied to the base of the transistor (Q 1) At this time, the switch (S 2) the pressing state, so the collector is at a high level that is through a The transistor Q 1 is turned on.
따라서 트랜지스터(Q1)의 에미터에는 베이스 전압보다 0.7V다운된 전압이 가해져 스위치(S2)를 온시킨 상태와 같은 스틸모드로 동작한다.Therefore, the emitter of the transistor Q 1 is applied with a voltage 0.7 V lower than the base voltage, and operates in the same still mode as the switch S 2 is turned on.
여기서 제3도와 같이 스틸구동부가 동작하면 마이컴(IC)에서 스틸기간(T)을 체크하여 스틸기간(T) 이내일 경우 스틸구동부로 궤환시키고 스틸기간(T) 이후일 경우에는 마이컴(IC)의 지시에 의해 스톱 모드로 진행되므로 VCR의 테이프 진행이 플레이 상태에서 스틸모드로 변환되어 일정시간이 경과되면 자동으로 VCR의 화면이 정지되는 것이다.Here, as shown in FIG. 3, when the steel driver operates, the microcomputer IC checks the steel period T to return the steel driver to the steel driver when the steel driver is within the steel period T. As the instruction proceeds to the stop mode, the VCR tape progresses from the play state to the still mode, and the VCR screen is automatically stopped after a certain time.
이상에서 설명한 바와같은 본 고안은 사용자가 VCR재생화면을 시청하다가 TV모드로 전환시 VCR의 테이프가 플레이 상태에서 스틸모드로 변환된 후 자동으로 정지되므로 사용자가 TV모드 전환 직전의 VCR의 테이프의 위치를 용이하게 찾을 수가 있어 종래와 같이 테이프를 리바인드시킬 필요가 없어지므로 제품의 사용이 더욱 편리해지는 효과가 있는 것이다.As described above, when the user views the VCR playback screen and then switches to the TV mode, the VCR tape is automatically stopped after the VCR tape is changed from the play state to the still mode. Since it is easy to find the need to rebind the tape as in the prior art, the use of the product is more convenient.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019880019440U KR940001201Y1 (en) | 1988-11-30 | 1988-11-30 | Auto-stop circuit at vcr/tv mode transfer for vcr |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019880019440U KR940001201Y1 (en) | 1988-11-30 | 1988-11-30 | Auto-stop circuit at vcr/tv mode transfer for vcr |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR900010689U KR900010689U (en) | 1990-06-04 |
| KR940001201Y1 true KR940001201Y1 (en) | 1994-03-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019880019440U KR940001201Y1 (en) | 1988-11-30 | 1988-11-30 | Auto-stop circuit at vcr/tv mode transfer for vcr |
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| Country | Link |
|---|---|
| KR (1) | KR940001201Y1 (en) |
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1988
- 1988-11-30 KR KR2019880019440U patent/KR940001201Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR900010689U (en) | 1990-06-04 |
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