CN1046254A

CN1046254A - Single-key remote-controlled television set

Info

Publication number: CN1046254A
Application number: CN90105268A
Authority: CN
Inventors: 陶圣华
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-04-18
Filing date: 1990-04-18
Publication date: 1990-10-17

Abstract

A kind of single-key remote-controlled television set.Promptly insert single-key remote-controlled circuit at the common TV machine circuit, adopt coding manually, radiating portion is single-key remote-controlled reflector, and receiving unit is by infrared receiving circuit, manually shutdown circuit is formed when station selecting circuit, pulse-recognition circuit, on/off circuit, channel selecting counting circuit, noise elimination and chamber.This single-key remote-controlled device than the multikey remote control have circuit simple, with low cost, practical, suit on the particularly various black and white television sets of the television set of various non-remote controls, to use.

Description

Single-key remote-controlled television set

The invention belongs to the TV remote-control device.

At present, the multikey remote control that color television set (comprising a small amount of black and white television set) adopts is the binary coding instruction of appliance computer, have multiple functions such as switching on and shutting down, channel selection, adjusting volume, brightness, colourity, contrast, easy to use, but because its coded system complexity.The components and parts that adopted are had relatively high expectations, basic dependence on import, thereby cost is higher, is not suitable for especially promoting on general black and white television set.

The objective of the invention is to design a kind of television set that has easy single-key remote-controlled device.

The present invention is achieved like this, promptly on the circuit of common non-remote control black and white or color television set, add a single-key remote-controlled device, this single-key remote-controlled device adopts the coding of pulsewidth scheduling manually, promptly with the length of staff button time as different information, this single-key remote-controlled device comprises and transmits and receives two parts, radiating portion is a singly-bound reflector, it is by a button, power supply and infrared emission circuit are formed, and the infrared emission circuit is made up of one 4 NAND gate CMOS integrated circuit and other components and parts.Receiving unit links to each other with the common TV machine circuit, and it is made up of infrared receiving circuit, manual station selecting circuit, pulse-recognition circuit, on/off circuit, channel selecting counting circuit, noise elimination and timing shutdown circuit.Press the button of single-key remote-controlled device, the infrared transmitting tube of infrared emission circuit is launched infrared signal, infrared receiving diode by infrared receiving circuit receives, through amplification, filtering, shaping, output low level pulse signal, by manual station selecting circuit, send into pulse-recognition circuit, and then the control switch machine circuit.If it is longer that button is pressed the time, i.e. control switch machine circuit shutdown, shorter if button is pressed the time, then control switch machine circuit start, or give channel selecting counting circuit a count pulse, can the different television channel of selective sequential.Noise elimination and timing shutdown circuit all utilize lock-out pulse work, and when receiving TV signal, lock-out pulse occurs, and noise elimination and timing shutdown circuit are closed, and when no TV signal, lock-out pulse disappears, noise elimination and automatic shutdown circuitry work.Its electric work process is set forth by embodiment.

Description of drawings.

Accompanying drawing 1 is infrared emission circuit diagram, wherein y ₁y ₄Be a CMOS4 NAND gate integrated circuit, y ₁With y ₂Constitute a multivibrator, y by button AN control ₃, y ₄The triode T that promotes in parallel ₁, T ₂, R ₂With y ₁The series connection of input, R ₃W connects with semifixed resistor, y ₂, y ₃, y ₄An input termination positive supply, triode T ₁Base stage directly meets y ₃, y ₄Output, triode T ₁, T ₂Compound, infrared transmitting tube D is connected between positive supply and the transistor collector, T ₂Emitter connects a small resistor over the ground, and the resistance size is with mains voltage variations.

In the accompanying drawing 2, wherein (1) is infrared receiving circuit, and it is by infrared receiving integrate circuit IC ₁And other element constitutes IC ₁And other elements constitute IC ₁The 7th pin is an input, and the 1st pin is an output, and the 8th pin meets a voltage stabilizing didoe D ₂, D ₁Be infrared receiving diode.(2) be manual station selecting circuit, by y ₁, y ₂And other elements constitute multivibrator, wherein a y ₁An input pass through D ₃Meet R ₅And button AN, R ₅Another termination V _DD, another input termination IC ₁The 1st pin.(3) be pulse-recognition circuit, by y ₃, y ₄And other elements constitute R ₇With D ₄Back one termination y in parallel ₃An input, another termination C ₁₀Negative pole and y ₄α holds y ₄Output and y ₃B end is directly continuous when no timing shutdown function, passes through R when the timing shutdown function is arranged ₈Link to each other, and y ₃B termination one capacitor C ₁₁, y ₃Output and y ₄The b end directly links to each other.(4) be on/off circuit, it is by R ₉, D ₅, T ₁Constitute D ₅With T ₁The collector electrode series connection.(5) be channel selecting counting circuit, by IC ₃, T ₂-T ₉Constitute Deng element, by IC ₃Constitute 8 systems or 10 system counters Deng element, Fig. 2 is 8 system R ₁₁With C ₁₂Connect again and be connected light-emitting diode D with the CL end ₂₂-D ₂₉Respectively with D ₁₄-D ₂₁Receive on the band switch again after the series connection.Its C ₁₃Be connected on count integration block R and+V ₂Between.(6) be noise elimination and timing shutdown circuit, it is by T ₁₀, T ₁₁And other elements constitute.T ₁₁Base stage is passed through R ₂₇With T ₁₀Collector electrode links to each other, R ₂₅Than R ₂₇Be worth little, R ₂₆Be connected in R ₂₅With C ₁₇Between, D ₃₁Be connected in C ₁₇Anodal and+V ₂Between, D ₃₂Be connected C ₁₇And y ₃Between the b end.

The electricity work process of the single-key remote-controlled device of this single-key remote-controlled television set is as follows: press the button AN of single-key remote-controlled device, the y of 4 NAND gate integrated circuits ₁With y ₂The multivibrator that constitutes promptly produces oscillator signal, and oscillator signal is through y ₃, y ₄Behind the parallel connection buffer, promote triode T ₁-T ₂, oscillator signal is that carrier is launched with the infrared ray by infrared-emitting diode D again, the time length of emission depends on the time length that AN presses.This circuit is owing to adopt the cmos circuit quiescent current atomic, so can save mains switch, and operating voltage range is wide, but from 3V-15V operate as normal all, operating voltage does not only change R simultaneously ₄Size get final product, when 3V works, can save need not, y ₃, y ₄Can improve the promotion ability after the parallel connection.Work R when helping low-voltage ₂Play the effect of stable oscillation stationary vibration frequency.

The infrared generation signal that the infrared emission circuit is launched is by the infrared receiving diode D of infrared receiving circuit ₁After the reception, through IC ₁And the infrared receiving circuit processing of relevant elements formation, make IC ₁The 1st pin becomes low level state by high-impedance state, and low level time that is pressed with reflector AN button of holding time is identical.In manual station selecting circuit, when not carrying out manual channel selection, when promptly the AN button is not pressed, y ₁An input through D ₃, R ₅Clamp down on high level y ₁, y ₂Just do not constitute oscillator.At this moment work as IC ₁When the 1st pin becomes electronegative potential by high potential, corresponding y ₂Output also becomes electronegative potential by high potential, so, when the AN button that links to each other with manual station selecting circuit is not pressed, y ₂Output becomes electronegative potential by high potential, just means that remote control transmitter AN is pressed y ₂The output low level is held time and identical with AN time of pressing in the reflector is pressed the time more in short-term, y when the reflector button ₁The high level pulse of output is as channel selecting signal, and the time is when longer, y ₂The low level pulse of output is as off signal.When turning on the television set general supply, because C ₁₀Be connected on y ₄Input and power supply between, C ₁₁Be connected on y ₃Input and ground between, make y ₄Be output as low level, T ₁₁End, circuit is in open state.If C ₁₁The ground connection termination power, C ₁₀Connect power end ground connection, a switch power supply, y ₄Output is a high level then, and circuit is in off-mode.In the accompanying drawing 2 the previous case V _KBe connected on the television power circuit respective point, divide three kinds of situations to narrate its operation principle below.(1) be in open state when pulse-recognition circuit, and y ₂The low level pulse of output is kept more in short-term, because D ₄End.R ₇C ₁₀Be worth bigger, y ₄The α terminal voltage be unlikely and drop to below the threshold value, again because y ₃The α end is low level, and attitude is constant so circuit is remained stationary.(2) be in open state when pulse-recognition circuit, and y ₂The low level pulse of output is held time when longer, y ₃The α end, y ₄α and b end level all are in low level, so y ₄Output becomes high level by low level, enters off-mode, y ₂After the negative pulse of output disappears, off-mode will remain unchanged.(3) when pulse-recognition circuit is in off-mode, i.e. y ₄Be output as high level, at y ₂When no low level is exported, y ₃α, b end, y ₄The α end all is in high potential, y ₄The b end is in electronegative potential, at this moment, if y ₂Output electronegative potential, then y ₃The α end becomes electronegative potential, y ₃As long as the output high potential is y ₂The low level of output is held time shorter, again because R ₇, C ₁₀Be worth bigger, y ₄The α terminal voltage still know and make high level, y then ₄Output becomes low level, and circuit is in open state.R ₈, C ₁₁Mainly add for timing shutdown circuit, when not needing the timing shutdown function, they can remove.By y ₁The channel selection pulse of output is through R ₁₁, C ₁₂After carrying out anti-interference filtration, be added to IC ₃CL end, give IC ₃The counter that reaches the relevant elements formation provides a count pulse, makes it add 1, counter Q.-Q ₇Export high level successively, promote corresponding switch triode T ₂-T ₉Corresponding band switch of gating and tuning voltage.Manually channel selection for convenience, this remote control has designed a manual ringing generation circuit, and it is by y ₁, y ₂And the relevant elements formation, when not using remote control transmitter, y ₁α end be in high level, manually press AN, D during channel selection ₃Just become and end y by conducting ₁, y ₂On the oscillator that constitutes with regard to starting of oscillation, y ₁Output high level pulse string is sent into channel selecting counting circuit, and each channel of gating in order when choosing the channel that will watch, unclamps button AN automatically, and channel selecting counting circuit just is fixed on this channel.In addition, when no TV signal, sound accompaniment circuit can be exported very big noise, and television set also needn't be worked for a long time, and for this reason, this remote control has designed noise elimination and timing shutdown circuit, and it is by T ₁₀, T ₁₁Constitute Deng element, its input signal is taken from the lock-out pulse V that synchronizing separator circuit is sent here _Sy, when receiving TV signal, lock-out pulse is through C ₁₅Isolate and get its Alternating Component, through D ₃₀Rectification, R ₂₃, R ₂₄Be added to T after the dividing potential drop ₁₀On the base stage, T ₁₀Conducting, collector voltage descends.T ₁₁Then end T ₁₁Collector electrode is connected on the volume potentiometer center, and volume can be through the volume potentiometer free adjustment.When no TV signal.Lock-out pulse V _SyDisappear T ₁₀End T ₁₁Conducting, T is passed through at the volume potentiometer center ₁₁Ground connection, no sound accompaniment noise output, at this moment timing shutdown circuit is started working, and it is by R ₂₆, C ₁₇, D ₃₁, D ₃₂And R ₈, C ₁₁Constitute.Because T ₁₀End+V ₂Pass through R ₂₅, R ₂₆To C ₁₇C is worked as in charging ₁₇After voltage is higher than the thresholding limit value, through isolating diode D ₃₂Be added to y ₃The b end makes pulse-recognition circuit become off-mode by open state, and regularly length depends on R ₂₆, C ₁₇The size of value.Being connected to of the receiving unit of single-key remote-controlled device and common TV machine circuit :+V ₁Receive the rectification output cathode, V _KReceive power supply compound adjustment pipe or switching tube base stage ,+V ₂Connect+10.5-+12V, all the other are received on the corresponding contact.

The remote control You Yu of this single-key remote-controlled television set adopts manually pulsewidth modulation coding, soon manually pressing single-key remote-controlled transmitter button time length Zuo is different information, shorter Zuo start of the time of pressing or channel selecting signal, longer Zuo of the time of pressing is off signal, the Zhe sample, simplify circuit than the multikey remote control, reduced cost thereby dare the day of one's doom big limit ground. You is because of the actual use of Zai Zhong, and the most usedization is channel selection and switching function, so the design has satisfied instructions for use basically. Button of manual channel selecting signal circuit You Yu Zhi You of the design, and automatic sequence channel selection, also more general manual station selecting circuit is simplified conveniently. In addition, the design Zhong Zeng has added noise elimination and timing shutdown circuit, makes it have more practical value. Therefore, this single-key remote-controlled Zhuan Zhi is suitable for the black and white of the various non-remote controls of Zai And promote the use of Zhong the production of colour television set and the repacking.

Claims

1, a kind of single-key remote-controlled television set of being made up of remote control transmitter, remote-control receiving circuit and common non-remote-controlled television set circuit is characterized in that its remote control transmitter is that its remote-control receiving circuit of single-key remote-controlled reflector is made up of infrared receiving circuit, manual station selecting circuit, pulse-recognition circuit, on/off circuit, channel selecting counting circuit, noise elimination and timing shutdown circuit.

2, single-key remote-controlled television set as claimed in claim 1 is characterized in that described single-key remote-controlled reflector has only a button, and its radiating circuit is made of a CMOS4 NAND gate integrated circuit and other elements, wherein y ₁, y ₂Constitute a multivibrator, y ₃, y ₄Parallel connection, R ₂With y ₁The series connection of input, R ₃W connects with potentiometer, y ₂, y ₃, y ₄An input termination positive supply, triode T ₁Base stage directly meets y ₃, y ₄Output, triode T ₂Emitter connect a resistance over the ground, infrared transmitting tube D receives positive supply and triode T ₁, T ₂Between the collector electrode.

3, single-key remote-controlled television set as claimed in claim 1 or 2 is characterized in that single-key remote-controlled transmitter power voltage can selection arbitrarily between 3-15V.

4, single-key remote-controlled television set as claimed in claim 1 is characterized in that the infrared reception ic chip in its infrared receiving circuit ₁The 8th pin be that supply pin meets a voltage stabilizing didoe DD ₂, and R ₂Conventional value is little.

5, single-key remote-controlled television set as claimed in claim 1 is characterized in that its manual station selecting circuit only manually controls its y with a button AN ₁α end and IC ₁The 1st pin y that links to each other ₁The b end passes through D ₃With R ₅And button AN links to each other.

6, single-key remote-controlled reflector as claimed in claim 1 is characterized in that its pulse-recognition circuit is by y ₃, y ₄, D ₄, R ₇, C ₁₀Constitute its R ₇, D ₄Be connected on y after the parallel connection ₃α point and y ₄α, C ₁₀Between, y ₃Output and y ₄The b end directly links to each other y ₄Output and y ₃B end is directly continuous when no timing shutdown function, passes through R when the timing shutdown function is arranged ₈Link to each other, and y ₃B termination one capacitor C ₁₁

7, single-key remote-controlled television set as claimed in claim 1 is characterized in that its channel selecting counting circuit is by IC ₃, T ₂-T ₉Constitute R Deng element ₁₁With C ₁₂Connect back and IC ₃CL end link to each other its C ₁₃Be connected on count integration block R and+V ₂Between, D ₁₄-D ₂₁Respectively with D ₂₂-D ₂₉Connect with band switch again after the series connection.

8, single-key remote-controlled television set as claimed in claim 1 is characterized in that its noise elimination and timing shutdown circuit are by triode T ₁₀, T ₁₁And other elements constitute T ₁₁Base stage is passed through R ₂₇With T ₁₀Collector electrode links to each other.R ₂₅Than R ₂₇Be worth little, R ₂₆Be connected in R ₂₅With C ₁₇Between, D ₃₂Be connected in C ₁₇And y ₃Between the b end, D ₃₁Be connected in C ₁₇Anodal reaching+V ₂Between.