CN2120415U

CN2120415U - Romote-control receiver for tv

Info

Publication number: CN2120415U
Application number: CN91232289U
Authority: CN
Inventors: 李涛
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-12-12
Filing date: 1991-12-12
Publication date: 1992-10-28

Abstract

A remote-control receiver for TV which can listen to TV sound is composed of a control keyboard, an infrared launch tube, a coding transmitting circuit, a receiving circuit for TV sound, a power supply and a housing, and can use a remote controller to control playback of TV horns, size of TV sound and size of sound volume. The remote-control receiver for TV not only can remotely control TV, but also can receive TV sound and bring great convenience to users.

Description

Romote-control receiver for TV

The utility model relates to the Television Reception Technology field, makes the TV remote controller of generally using at present have the function that receives television field frame, and can control the emission and the volume of television field frame with remote controller.

At present, TV remote controller does not have the television field frame receiving function, after pressing ventil, oneself does not listen to and just obtains plugging in the earphone before the television set or connecting radiating circuit if do not influence others, and is very inconvenient.

The utility model just provides a kind of novel receiver of remote-control sytem, and it not only has original whole distant control functions, and the normal playback, the volume of emission playback of audio signal in can remote-controlled television set, uses easily.

The purpose of this utility model is to realize like this; In remote controller, increased TV audio receiving circuit, sound accompaniment emission and control circuit in television set, have been increased, when pressing the control of remote controller key, the television set inner control circuit just is transferred to the loudspeaker pronunciation on the television field frame radiating circuit automatically, receive amplification with the sound accompaniment receiving circuit in the remote controller, promote the earphone sounding.

Owing to adopt above scheme, a machine is at hand, can remote control, can listen to again, and easy to use, improved a step than prior art.

Below in conjunction with drawings and Examples the utility model is described further:

Fig. 1 is the receiver of remote-control sytem outside drawing: the 1st, and shell, the 2nd, control button, the 3rd, infrared emission tube, the 4th, infrared receiver tube.

Fig. 2 is the element arrangements that receiver of remote-control sytem removes bonnet: the 3rd, and infrared emission tube, the 5th, encoding transmitting circuit, the 4th, infrared receiving tube, the 6th, sound accompaniment receives amplifying circuit, the 7th, earphone jack, the 8th, battery.

Fig. 3 receives television audio circuit figure: the 4th, and infrared receiver tube, R are biasing resistors, T1, T2, T3 are transistors, the 8th, battery, the 7th, earphone socket, C are capacitors.

Infrared receiver tube 4 one ends and T3 grounded emitter, one end and R are connected on the T1 base stage, and T1, T2, T3 are connected into multiple tube, and the T3 collector electrode is connected on the earphone jack, the 8th, the battery of former remote controller, minus earth, on the anodal lug machine transplanting of rice hole, television audio signals is received after the composite amplifier of triode T1, T2, T3 composition amplifies through infrared receiver tube, promote the earphone sounding, all element micro parts are irritated by figure combination back envelope, resemble integrated package.

Fig. 4 is control circuit and aural transmitting circuit, and all circuit is contained in the printed board, is contained in the television set, X1 terminates on the tv volume potentiometer, perhaps is connected on when pressing ventil on the pin that changes from remote control microprocessor integrated package leading foot pulsewidth, and X2 connects+the 12V power supply, X3 ground connection, X4 connects the television set speaker line, and IC integrated package model is that the JEC-2 paired pulses plays shaping and amplification, and its 7 pin meets W1, C1, R1,5 pin meet R2,2 pin meet C4, C5,13 pin ground connection, another termination of R1 X1.W1, C1, R3 ground connection, R2 connects positive source, the T11 grounded emitter.Base stage connects the T12 collector electrode by C3, R9, by R7 ground connection, is connected on the C4 by D1.Collector electrode is just connecing power supply by R5, meets C4 by R4, is connected on the T12 base stage by C2, R6.The T12 grounded emitter, collector connecting relay J, D ₃, R ₁₀R ₁₀One terminates on the C5, another termination power of J, D3.Base stage meets C5 by D2, by R8 ground connection.J is one group of changeover contact of relay J, and original tone frequency channel wire from the wiring board to loudspeaker is cut off, and wiring board comes line to be connected on the J swing arm, goes horn wire to be connected on the J normally closed contact, J normal opened contact sending and receiving optical diode D4, D5.D4, the D5 other end pass through R11, R12 ground connection, and D4, D5 are contained on the TV set panel.

Triode T11 and T12 form bistable circuit, because resistance R 6 is different with the R9 value, triode T11 is in saturatedly in the time of can guaranteeing to start shooting at every turn, makes relay J be in release condition.

When pressing ventil or volume and be reduced to 0, bring out existing voltage at X1 and raise, through the amplification of resistance R 1 ic chip, shaping output.Through diac D1, D2 output negative pulse, trigger the bistable circuit upset that T11, T12 form, make the J adhesive, aural transmitting circuit is connected.Owing to pressed ventil one time, at this moment the television audio circuit is in the noise reduction state, and low discharging circuit is not worked, and can not launch sound accompaniment.Click ventil again, to diac is a positive pulse, therefore bistable circuit does not overturn, noise reduction is removed, and low discharging circuit is started working, and makes infrared transmitting tube begin audio signals, just can receive, at this moment press volume control key, the luminous power of infrared light-emitting diode will be along with variation, and volume also can and then change in the earphone.When the needs loudspeaker pronounce, click ventil, negative pulse of ic chip output, the circuit upset, relay J discharges, and connects loud speaker, and at this moment low putting is in the noise reduction state, and low discharging circuit is not worked, and presses ventil again, the pronunciation of TV loudspeaker.

Above embodiment is applicable at the remote control microprocessor internal noise reduction control signal and volume control signal is mixed the situation that draw from a leading foot back that present this type is maximum.

Figure five is another one embodiment, is applicable to that in television set remote control microprocessor draws the circuit of volume control signal and noise reduction signal respectively.The circuit of Fig. 5 is contained in the television set, X1 is connected on when pressing ventil, on the pin of remote control microprocessor voltage or pulse width variations, X2 connects power supply, X3 ground connection, the integrated package model is JEC-2, its 7 pin meets W1, C1, R1, R1,5 pin meet R2,8 pin meet R3,13 pin ground connection, and 2 pin pass through J, D1 connects power supply, another termination of R1 X1, W1, R3, C1 ground connection, R2 one termination power, J-1 are one group of changeover contacts of relay J, and original wiring board is cut off to the tone frequency channel wire of loudspeaker, wiring board comes line to be connected on J-1 swing arm and the resistance R 4, go horn wire to be connected on that J-1 is commonly used to be closed on the contact, the J-1 normal opened contact is by voice modulation transformer and R5 ground connection, and voice modulation transformer secondary output one end connects power supply by another normal opened contact J-2 of relay J, the other end connects the J collector electrode by coil L, the T emitter passes through R8, C4 ground connection, base stage meets R6, R7, C2, R6, the R7 other end connects B and ground respectively, and the C2 other end passes through C3, L connects the T collector electrode, another group coil one end ground connection of L, a termination antenna.

Principle is as follows: after pressing ventil, high potential of X1 end input, the relay J adhesive, the inductance of three-point high-frequency oscillating circuits that J-2 closure, the closed triode T of J-1 and inductance coil L form is started working, the television field frame signal is modulated higher-order of oscillation waveform through transformer B, go out through transmission antennas transmit, the size of volume is controlled button with regard to the modulation depth of powerstat B to high-frequency signal with the volume of remote controller, reaches the purpose of control volume power.Click ventil again, 1 end becomes electronegative potential, and relay 8 discharges and disconnects radiating circuit, recovers the loudspeaker playback.Fig. 6 is a micro-type receiver circuit, is contained in the remote controller, and volume is very little, power consumption is economic, and Z * 2, Z * 3 are connected on the remote controller battery, connect loudspeaker between ZX1 and the ZX3, the integrated circuit (IC) model is YS414, and G holds ground connection, and the I end meets R1, C2, O termination R1, R2, C3, C4 by L1, C1.C2, C4 one end ground connection, another ending connecting audio output of C4 ZX1, R2 one termination power.The television field frame signal is sent into ic chip and is amplified behind receiving coil L1 and capacitor C 1 resonance, promote the earphone sounding through capacitor C 4 output audio signals through ZX1.

Claims

1, a kind of TV remote receiver, by supervisory keyboard, infrared emission tube, encoding transmitting circuit, power supply is formed, and it is characterized in that: TV audio receiving circuit is housed.