CN2198729Y - Full computer remote control colour TV channel expander - Google Patents

Abstract

The utility model provides an outside type full computer remote control colour TV channel expander which is composed of a remote-controlled transmitter, a remote-controlled receiver, a microprocessor, a memory, a wave changing switch, a local keyboard, a tuner, a line-field synchronizing signal oscillator, a signal intermediate amplifying processor, an image signal synthesizer, a radio frequency modulation device and a power supply. The utility model effectively solves the trouble of adding and installing a channel expander in the inside type colour TV. When used, the utility model only needs to be connected with the outer part of the colour TV without disassembling the colour TV, and thus, the utility model not only has the remote-controlled function, but also enables the colour TV to receive the newly added television programs from the cable television station.

Description

Full computer remote control colour TV channel expander

The utility model relates to a kind of color TV channel and increases enlarging device.

At present, most of colour TVs lack distant control function, there is loaded down with trivial details adjusting during program receiving, the function that has remote control for the colour TV that makes no remote control, usually all to take colour TV apart and in colour TV, install infrared remote control system additional, but this work must just can be finished by the technical staff who possesses certain level, brings very big inconvenience to the user; Along with development of science and technology, constantly the start broadcasting TV programme of additional channel of cable TV station, and original colour TV can't be watched, also lacks the optional equipment that receives additional channel on the market, has greatly limited user's program receiving source.

In order to overcome above-mentioned deficiency, the purpose of this utility model provides a kind of full-computerized RTV remote television channel expander, need not to take apart colour TV, only need connect in the colour TV outside, just can reach and both had distant control function, can make colour TV receive constantly the start broadcasting TV programme of additional channel of cable TV station again.

The purpose of this utility model realizes by following technical proposals.

As shown in Figure 1, the utility model includes remote control transmitter, receiver of remote-control sytem, microprocessor, memory, band switch, this switch dish and power circuit, remote control transmitter and receiver of remote-control sytem send by infrared ray and receive, with key information coding on the mobile phone, modulation sends, receive, deliver to microprocessor after the demodulation, this switch dish is also given microprocessor transmit operation control command, the wave band transducer, reception is from the signal of microprocessor, automatically change received signal, the operational order in memory storage microprocessor selective reception radio station, power circuit provides supply voltage for the complete machine each several part, it is characterized in that it contains tuner, row field sync signal oscillator, put processor in the signal, picture intelligence synthesizer and rf modulations, the input of tuner reception antenna induced signal, provide each control signal of electronic tuning (band switch voltage by microprocessor, automatic frequency control signal and tuning voltage) remove to control tuner, the TV programme of a certain channel of selective reception, the output medium-frequency TV signal is added to puts processor in the signal, in put processor intermediate-freuqncy signal amplified, and demodulate vision signal and audio signal, putting the screen display signals that picture intelligence that processor sends here and microprocessor send here during the picture intelligence synthesizer is finished synthesizes, make the video modulation input signal of radio-frequency modulator, radio-frequency modulator is modulated to first channel with video and audio signal and outputs to television set.

The utility model is that a kind of television set external form channel increases enlarging device, easy to connect during use, the type that efficiently solves in the machine installs channel additional and increases the loaded down with trivial details of enlarging device, and it only takies channel of TV and can realize that the expansion of channel uses, and its expansion can reach 90 channels.

Below will be by specific embodiment to the utility model is described in further detail.

Fig. 1 is the circuit block diagram of full-computerized remote control color TV channel expander.

Fig. 2 is the circuit theory diagrams of full-computerized remote control color TV channel expander.

Fig. 3 is a remote control system transmitter circuit schematic diagram.

Fig. 4 is infrared reception amplifying circuit schematic diagram.

As shown in Figure 1 and Figure 2, in power circuit, power transformer output 17V and two groups of voltages of 35V, 17V behind rectifying and wave-filtering, output to integrated circuit (IC) 8, IC9 and IC10 respectively must for+6V ,+12V and+5V voltage, voltage 35V is output+32V after filtering and voltage stabilizing, and these several groups of voltages are supplied with the various piece of complete machine respectively.As shown in Figure 3, this remote control system transmitter circuit is made up of three parts, and the one, core pulse code modulator SAA3010, it produces key bit scan signal, reads the coding of each key, and the pulse code signal after the output modulation; The 2nd, keyboard matrix constitutes 8 * 8 keyboard matrixs by scanning output and the keyboard circuit of SAA3010; The 3rd, amplification driving circuit; it can be amplified to enough power with the modulated coded pulse signal that SAA3010 produces and remove to drive infrared light-emitting diode; send the infrared signal of band coded message; when keyboard is pressed; code signal output promptly begins; the command code pulse train is exported by SAA3010 the 7th pin; and be extended to button and upspring or press a plurality of keys; in case a command code pulse train has begun to produce; even operating key is upspring or a plurality of operating key is pressed, output will stop after this instruction is finished, and this remote controller has multikey action protection function; when multikey is pressed simultaneously, radiating circuit will can not produce the coded pulse sequence of output.As shown in Figure 4, the infrared remote-controlled signal receiver mainly is made up of PW type photodiode PH302B and preposition amplification receiving integrate circuit C * 20106, when remote controller sends infrared remote-controlled signal, photodiode PH302B is energized the generation photoelectric current, light signal is converted to the signal of telecommunication, amplify through carrier wave again, amplitude limit, detection, shaping, obtain remote control coding pulse (remote control command) and be sent to the remote control decoding circuit, the signal input microprocessor that goes out through the remote control decoding circuit decoding, microprocessor is an integrated circuit PCA84C641, the function of its each pin is: the pulse-width modulation output of 1 pin output, after amplification is level and smooth by peripheral integrating circuit, tuning voltage as high-frequency tuner, the pulse modulation output signal of 2 pin output, be used for volume control by peripheral integrating circuit after level and smooth, 7 pin, 8 pin are the waveband selection control end, the control signal of output is amplified as corresponding, to satisfy the requirement of high-frequency tuner band switch, 9 pin are automatic frequency control signal (AFC) input, the requirement of the automatic frequency control signal (AFC) of input is amplitude of oscillation 25V+2.5V, this signal be used for determining accurately tuning, and the radio station identification signal is used for roughly finding TV station's signal, 13 pin to 19 pin are this switch dish control pin, 20 pin are system pattern gating output pin, be used for " function selecting " being scanned detection in each start back, 21 pin are grounding leg, 22 pin, 23 pin are the screen display signals output, 26 pin, 27 pin show the field sync signal and the line synchronizing signal input of location usefulness for screen, can take from main frame core scanning circuit line flyback pulse and field flyback pulse respectively, 28 pin, 29 pin show the oscillator terminals that circuit takes place for screen, external LC oscillating circuit, 30 pin are test lead, ground connection during practical application, the external 10MHZ crystal oscillator of 31 pin and 32 pin, the clock oscillation of forming microcontroller, the setting circuit of the external microprocessor of 33 pin, when guaranteeing to start shooting at every turn, microcontroller all obtains set, and the asserts signal of circuit generation should keep low level till the 5V power supply effectively thus.34 pin are radio station identification (ZDENT) signal input pin, be used to tell whether microprocessor roughly receives an effective TV signal, available composite synchronizing signal is as this radio station identification signal, 35 pin are the remote signal input, reception is from the signal output of integrated circuit C * 20106, and 36 pin are the sound accompaniment control output end, and 37 pin are sound accompaniment effect control output end, 38 pin are that standard is selected control end, and 39 pin, 40 pin are I ²The output of C bus bar (BVS), 39 pin are data wire, and 40 pin are clock line, and this is a two-way control bus bar of multiple main equipment two-wire, is used to control memory PCF8582, and 41 pin are AC-DC switch machine control output end, and 42 pin are power input.Tuner is made up of tuner TDY-3B, the radio frequency radio signals of its selective reception input, and be transformed into intermediate-freuqncy signal output, its receiving channels is a very high frequency(VHF): VL:1-5 channel, UH:Z1-Z16 channel, superfrequency: UHF:13-57 channel; It imports socket, require the uneven input of 75 Ω, the function of each pin is: 1 pin BU uhf band power end, 2 pin BT are the tuning voltage control end, 3 pin BH, VH is the frequency range working power end, 4 pin AGC are that height is put the AGC input, 5 pin BL, VL is a frequency range operating voltage end, 6 pin AFC are tuning AFC voltage end, and 7 pin BM are tuning high discharge source input, and 8 pin are the intermediate-freuqncy signal output, 7 pin of integrated circuit (IC) 1 when transferring platform, the band switch signal of 8 pin output, via integrated circuit (IC) 4 wave band electric pressure converters, convert BL to, BH, BU control voltage is selected frequency range, the pwm voltage of the 1 pin output of integrated circuit (IC) 1, through amplify and peripheral integrating circuit level and smooth after, as the tuning voltage of high-frequency tuner, promptly VT holds input signal, AFC end control voltage, by resistance R 5, R4 biasing and get, the AGC end by in put process chip IC2 11 pin export and provide.Put processor in the signal and contain integrated circuit TA7680, it is to be used to finish the intermediate-freuqncy signal that tuner TDY-3B turning device is come amplify, demodulation, the output television video frequency signal, composite synchronizing signal and television audio signals, accept the audio volume control signal of the 2 pin output of chip IC 1 simultaneously, efficient delay AGC signal is provided for tuner TDY-3B, AFC is provided voltage control signal for chip IC 1, chip IC 2TA7680AP is put integrated circuit in image and the sound accompaniment, in be provided with visual intermediate frequency and amplify, video detection, video amplifies, the AFC detection, the black and white noise is anti-phase, high frequency AGC is amplified, intermediate frequency AGC amplifies and sound accompaniment frequency modulation frequency discrimination, circuit such as audio frequency amplification, wherein, 1 pin is the input of volume control voltage, 2 pin output pulse width modulation signals of chip IC 1 amplify through triode V05 paraphase, by resistance R 51, R52, capacitor C 39, C40 forms integrating circuit it is played smoothing effect, be input to 1 pin of chip IC 2, as volume control voltage, 2 pin are audio frequency amplifier negative feedback input, 3 pin are the audio frequency amplifier output, output audio signal, import by triode V03 base stage, after paraphase is amplified, by resistance R 107, the R12 dividing potential drop is coupled into feedback end through capacitor C 16, be 2 pin of chip IC 2, another road is through resistance R 32, R33, R81 and capacitor C 37, C92 is synthetic as chip IC 6(C1507AC with the audio signal sent here of Karaoke passage) audio modulation signal of radio-frequency modulator is by chip IC 6(C1507AC) the input of 6 pin, 4 pin of chip IC 2 are the place of working end, 5 pin are intermediate frequency AGC filtering, 6 pin, between 9 pin high frequency phase compensation, 7 pin, 8 pin are signal input end of intermediate frequency, the 1F end output intermediate-freuqncy signal of TDY-3D turning device, be input to triode V01 and carry out intermediate frequency compensation amplification, SAW (Surface Acoustic Wave) filter T1036C9210 is put filtering in being, intermediate-freuqncy signal is added to 7 pin of chip IC 2 after the filtering, put the input signal of passage in the conduct of 8 pin, 10 pin are that height is put AGC delay adjustment input, 11 pin are that height is put AGC output, 12 pin are the place of working end, 13 pin, 14 pin are just anti-phase AFC output, output signal is to the B utmost point of triode V04, be input to 9 pin of chip IC 1 through level shift, it is AFC control voltage end, 15 pin are video output, 16 pin, connect the AFC tank circuit between 19 pin and adjust inductance, 17 pin, 18 pin are adjusted inductance for the video tank circuit, 20 pin are power input, 21 pin are the second accompanying sound intermediate frequency signal input, 22 pin, 24 pin are sound accompaniment frequency discrimination loop incoming end, and 23 pin are high frequency decoupling end.Row field sync signal oscillator is mainly by chip IC 5(LA7801) form, its inside comprises separated in synchronization, circuit such as AFC capable field vibration and field excitation, each pin function is as follows: 1 pin is row AFC output, 2 pin are row oscillation circuit input, 3 pin are row AFC phase demodulation input, 4 pin output row oscillator signal, 5 pin are the place of working end, 6 pin, 7 pin, 8 pin are field excitation part pin, 9 pin are the field blanking signal output part, its output signal is imported as field sync signal through 27 pin of resistance R 64 coupling input chip IC 1,10 pin are an oscillation circuit input, 11 pin are the field sync signal input, 12 pin are working power end, connect+12V, 13 pin are the composite synchronizing signal output, 14 pin are the vision signal input, 15 pin are row AFC part power input, 16 pin are row AFC comparison signal input, here video input signals is by chip IC 2,15 pin output signals are through resistance R 25, R27, R84 and trapper capacitor C 62 are coupled into 16 pin of chip IC 5 and get, the capable field blanking signal and the composite synchronizing signal of output, be added to 26 pin of chip IC 1 respectively, 27 pin, 33 pin, row field blanking signal shows framing signal as the distant control function screen, and composite synchronizing signal is as the radio station identification signal.The picture intelligence synthesizer is by the integrated road IC7(MC14053BCP of multicircuit switch) to form, it is in order to finish TV image signal and distant control function screen display signals to be synthesized, the signal after synthesizing is as the video input modulating signal of radio-frequency modulator.Radio-frequency modulator is by chip IC 6(C1507AC) form, it exports to TV after with the modulation of picture intelligence and audio signal, its each pin function is as follows: 1 pin, 7 pin, 14 pin are the power ground end, 8 pin are power positive end, 2 pin are vision signal modulation output, 3 pin are High frequency filter, 4 pin, 5 pin are 6.5MHZ oscillation circuit input, 10 pin, connect the 49.750MHZ crystal oscillator between 11 pin, first channel image medium-frequency oscillator loop is provided, 12 pin, 13 pin connect the high frequency bypass circuit, 16 pin are the voice modulation input, and 6 pin are the video modulation input, and 15 pin are signal output after the voice modulation, this pin output signal is through capacitor C 68, resistance R 76 and chip IC 6, after the video modulation of 2 pin output signal with through capacitor C 72, the signal of resistance R 75 synthesizes, by capacitor C 65, C64, C66, C67, inductance L 14, after the radio-frequency filter filtering that L15 forms, export as radiofrequency signal.

Claims (2)

1, a kind of full-computerized remote control color TV channel expander, it includes remote control transmitter, receiver of remote-control sytem, microprocessor, memory, the wave band transducer, this switch dish and power circuit, remote control transmitter and receiver of remote-control sytem send by infrared ray, receive, key information coded modulation on the mobile phone is sent, receive, deliver to microprocessor after the demodulation, this switch dish is also given microprocessor transmit operation control command, band switch receives the signal from microprocessor, automatically change received signal, the operational order in memory storage microprocessor selective reception radio station, power circuit provides supply voltage for the complete machine each several part, it is characterized in that it also contains tuner, row field sync signal oscillator, put processor in the signal, picture intelligence synthesizer and rf modulations, the input of tuner reception antenna induced signal, provide each control signal of electronic tuning to remove to control tuner by microprocessor, the TV programme of a certain channel of selective reception, the output medium-frequency TV signal is added to puts processor in the signal, in put processor intermediate-freuqncy signal amplified, and demodulate vision signal and audio signal, putting the screen display signals that picture intelligence that processor sends here and microprocessor send here during the picture intelligence synthesizer is finished synthesizes, make the video modulation input signal of radio-frequency modulator, radio-frequency modulator is modulated to first channel with video and audio signal and outputs to television set.

2, expander according to claim 1 is characterized in that tuner is made up of tuner TDY-3B.

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