CN1790947A - Remote control signal receiver and its method for controlling external disturbance - Google Patents
Remote control signal receiver and its method for controlling external disturbance Download PDFInfo
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- CN1790947A CN1790947A CNA2004100931654A CN200410093165A CN1790947A CN 1790947 A CN1790947 A CN 1790947A CN A2004100931654 A CNA2004100931654 A CN A2004100931654A CN 200410093165 A CN200410093165 A CN 200410093165A CN 1790947 A CN1790947 A CN 1790947A
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Abstract
The remote control signal receive device comprises: a receiver optical assembly to receive signal form remote controller, a AGC to control signal gain, a bandpass filter to let pass signal with special frequency band, a modem for filter signal, a remote signal controller to control the regulation by AGC and demodulation by modem, and a microcomputer to treat the current signal as noise if the unnecessary impulse time interval between titles lower than given value. This invention obtains signal without noise and solves problem that user should repeat operation as can not continue operating key.
Description
(1) technical field
The present invention is relevant remote control signal receiver and method thereof, especially finish the function that constantly changes in the remote controller about improving by a key operation, but because of the noise of external disturbance causes continuous key can't normal running so that need the remote control signal receiver and the method thereof of the inconvenience that the user operates again.
(2) background technology
Usually, remote controller is the abbreviation of Long-distance Control (Remote Control) with the meaning of " remote by the radio operation machine ", is used in most of household appliances recently more.
Above-mentioned remote controller adopts frequency to be lower than the infrared ray of visible rays, it can transmit control signal to the light-emitting diode of remote controller, and, receive the control signal that remote controller sends by the receipts optical diode that is located at the remote control signal receiver in the electronic products such as TV or audio frequency.
Fig. 1 is the construction module figure of conventional formula remote control signal receiver 10, and Fig. 2 is the generation curve chart of unnecessary pulse in the conventional formula remote control signal receiver 10.
As shown in Figure 1, remote control signal receiver 10 is made up of following structure: promptly, receive the light receiving device 11 that remote controller sends light source; Be input to light source (signal) gain (gain) in the light receiving device 11 and reduce the automatic gain controller of heightening when faint (AGC:Auto Gain Control) 12 when higher.
In addition, also be included in the signal of adjusting through gain among the above-mentioned AGC12, the characteristic frequency of only letting pass is for the band pass filter (BPF) 13 of value (38KHz) signal and the demodulator (demodulator) 14 that the signal that filters by band pass filter 13 is carried out demodulation process.
In addition, whether also comprising is gained by AGC12 to the signal that filters by band pass filter 13 adjusts, and whether is carried out demodulation process by demodulator 14, and the remote signal controller of controlling 15.
As mentioned above, when receiving control signal by remote control signal receiver 10, send the control signal that receives the microcomputer of various electronic products such as TV, audio frequency, VCR to, with by remote controller, functions such as electric power on/off, volume be high/low are carried out Long-distance Control.
As shown in Figure 2, in multiple infrared induction mode, only accept the type of drive of characteristic frequency, when externally disturbing (disturbance) identical with characteristic frequency, will be at specific fluorescent lamp (three ripple lamps, unnecessary pulse takes place fluorescent lamp), so that can't carry out the problems such as operate miss that remote controller was controlled or occurred to remote controller.
In addition, in multiple infrared induction mode, suppose with the characteristic frequency to be preferential the selection, and signal gap time (Signa gap time), unnecessary pulse length (Burstlength), the AGC specific projects such as (Aut GainControl) that need satisfy between the actual signal can drive, even external disturbance (disturbance) has same characteristic frequency so, key also can carry out normal running continuously.
But at this moment, need satisfy all items and can carry out the operation of continuous key, otherwise key just can not be operated normally continuously.
For example, when opening a lot of fluorescent lamp in doors, if the volume of remote controller is high/low, will occur noncontinuities such as remote controller is reactionless can't the continuous key of normal running phenomenon.
(3) summary of the invention
Therefore, the present invention is intended to solve the problems referred to above that exist in the routine techniques, provide a kind of and can grasp the external disturbance characteristic of input simultaneously, and according to its characteristic induction and filtration external disturbance, only the microcomputer to electronic products such as audio frequency transmits normal signal, thereby can improve by a key operation and finish the function that constantly changes in the remote controller, but because of the noise of external disturbance causes continuous key can't normal running so that need the remote control signal receiver of the inconvenience that the user operates again and control the external disturbance method.
To achieve these goals, remote control signal receiver of the present invention is made up of following structure: the light receiving device that receives remote controller signal; Be input to signal gain in the light receiving device and reduce the AGC that heightens when faint when higher; In the signal of adjusting that gained by AGC, the characteristic frequency of only letting pass is for the band pass filter of value signal; To carry out the demodulator of demodulation process by the signal of band-pass filter; Signal by band-pass filter normally gained by AGC whether adjust, and normally whether carried out demodulation process by demodulator, the remote signal controller of controlling; Under the control of remote signal controller, the signal of demodulation process is carried out in input by demodulator, if the time interval of the unnecessary pulse that is taken place between title in this signal and the title is lower than the specific title time interval, just the above-mentioned signal that will import is considered as noise, and the microcomputer of being handled.
In addition, the above-mentioned specific title time interval is 4.5ms.
From another angle of the present invention, the method of remote control signal receiver control external disturbance is, send in the device of signal at the reception remote controller, with the specific title time interval is the benchmark of judging external disturbance, if the unnecessary pulse interval that is taken place between title in this signal and the title is lower than the specific title time interval, just the above-mentioned signal that will import is considered as noise and does not carry out data processing.
Effect of the present invention:
As mentioned above, remote control signal receiver among the present invention and method thereof, the title specified time interval of discerning far below microcomputer with the unnecessary pulse interval that is input in the microcomputer is a benchmark, in the unnecessary pulse that between title and title, takes place, the pulse that is lower than the specific title time interval is considered as noise, it is not carried out data processing.
In view of the above, obtain the effect that does not in fact have noise signal, solved in the routine techniques because of can't the continuous key of normal running, and the problem that needs the user to operate again.
For further specifying above-mentioned purpose of the present invention, design feature and effect, the present invention is described in detail below with reference to accompanying drawing.
(4) description of drawings
Fig. 1 is the construction module figure of existing conventional formula remote control signal receiver.
Fig. 2 is the generation curve chart of unnecessary pulse in the conventional formula remote control signal receiver.
Fig. 3 is the construction module figure of the remote control signal receiver among the present invention.
Fig. 4 a and Fig. 4 b improve the curve chart that waveform and conventional formula compare according to remote control signal receiver of the present invention actual.
The symbol description of major part in the accompanying drawing:
10: remote control signal receiver 11,21: light receiving device
12，22：AGC(Auto?Gain?Control) 13，23：BPF(Band?Pass?Filter)
14,24: demodulator (Demodulator) 15,25: remote signal controller
20: remote control signal receiver 26: microcomputer
(5) embodiment
Below with reference to accompanying drawings to remote control signal receiver of the present invention and control external disturbance method thereof
Embodiment is elaborated.
Fig. 3 is the remote control signal receiver construction module figure among the present invention, Fig. 4 a is the suffered external disturbance of existing conventional formula remote control signal receiver, be the curve chart of unnecessary pulse, Fig. 4 b is the process picture sheet that the remote control signal receiver control among the present invention is disturbed.
As shown in Figure 3, the remote control signal receiver of developing according to the present invention 20 by conventional formula receive light receiving device 21 that remote controller sends light source, when the gain (gain) that is input to the light source (signal) in the light receiving device 21 is higher, it is reduced processing, and the AGC22 that is then heightened processing when faint forms.
Comprise in above-mentioned AGC22 in the signal of adjusting through gain that the characteristic frequency of only letting pass is for the band pass filter (BPF) 23 of value (38KHz) signal and the demodulator (demodulator) 24 that the signal that filters by band pass filter 23 is carried out demodulation process.
In addition, whether also comprising is gained by AGC22 to the signal that filters by band pass filter 23 adjusts, and whether is carried out demodulation process by demodulator 24, and the remote signal controller of controlling 25.
In addition, also be included in input when carrying out the signal of demodulation process by demodulator 24, if the time interval of the unnecessary pulse that is taken place between title in this signal and the title is lower than the specific title time interval, just the microcomputer 26 that input signal is considered as noise and is handled.
That is to say, utilize remote controller usually when the microcomputer 26 of electronic products such as control audio transmits signal, with title and the actual data that transmit that transmit simultaneously high signal definition data message.At this since time interval of title be particular value, so with its benchmark as the unnecessary pulse of judgement.
In view of the above, based on the unnecessary pulse interval that takes place between the title (being generally 300 μ s) far above the above-mentioned specific title time interval (usually about 4.5ms), if in the unnecessary pulse of microcomputer between title and title, input is lower than the pulse in the specific title time interval, just it is considered as noise, the line data of going forward side by side is handled, to obtain the effect of in fact eliminating external disturbance.
To the process of the processing of the remote control signal receiver among the present invention external disturbance be elaborated below.
Shown in Fig. 4 a, the time interval of this unnecessary pulse of external disturbance is about 300 μ s.Shown in Fig. 4 b, the title time interval of being discerned by microcomputer is about about 4.5 μ s.
At this, title comprises also that signal transmits and the information of relevant transmission data such as the information of receiving side signal and transfer path in the signal that receives from the remote control signal receiver.
Shown in Fig. 4 b, between title and the title unnecessary pulse will take place, and these unnecessary pulses belong to external disturbance, their can transmit to signal and cause great obstruction, so that make the continuous key can't normal running.
Because the unnecessary pulse interval that is taken place between above-mentioned title and the title is below 300 μ s, and the specific title time interval is about about 4.5ms, so in above-mentioned unnecessary pulse, when input is lower than the pulse in the title time interval, to be regarded as noise, microcomputer can not carry out data processing to it, to obtain the effect that does not have external disturbance.
In view of the above, solved by external disturbance and cause the continuous key can't normal running, so that the inconvenience that needs the user to operate again.
The remote control signal receiver of developing according to the present invention is not limited to products such as audio frequency, video tape recorder, TV, and is equally applicable at the remote controller signal receiving system that embodies multiple electronic products such as the required washing machine of tame network, refrigerator.
Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claims of the present invention variation, the modification of the above embodiment.
Claims (3)
1, a kind of remote control signal receiver is characterized in that by forming as lower member:
Receive the light receiving device of remote controller signal;
Be input to signal gain in the described light receiving device and reduce the automatic gain controller of heightening when faint when higher;
In the signal of adjusting that gained by automatic gain controller, the characteristic frequency of only letting pass is for the band pass filter of value signal;
To carry out the demodulator of demodulation process by the signal of described band-pass filter;
Signal by described band-pass filter normally gained by automatic gain controller whether adjust, normally whether carried out demodulation process by demodulator, and the remote signal controller of controlling;
Under the control of described remote signal controller, the signal of demodulation process is carried out in input by demodulator, if the time interval of the unnecessary pulse that is taken place between title in this signal and the title is lower than the specific title time interval, just the microcomputer that the above-mentioned signal that will import is considered as noise and is handled.
2, remote control signal receiver as claimed in claim 1 is characterized in that:
The described specific title time interval should be 4.5ms.
3, a kind of remote control signal receiver control external disturbance method as claimed in claim 1 is characterized in that comprising:
Send in the device of signal at the reception remote controller, eliminating external disturbance should serve as the benchmark of judging external disturbance with the specific title time interval, and the external disturbance time interval of taking place between title is lower than above-mentioned title during the time interval, above-mentioned signal is considered as noise, it is not carried out data processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100931654A CN1790947A (en) | 2004-12-17 | 2004-12-17 | Remote control signal receiver and its method for controlling external disturbance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100931654A CN1790947A (en) | 2004-12-17 | 2004-12-17 | Remote control signal receiver and its method for controlling external disturbance |
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| Publication Number | Publication Date |
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| CN1790947A true CN1790947A (en) | 2006-06-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2004100931654A Pending CN1790947A (en) | 2004-12-17 | 2004-12-17 | Remote control signal receiver and its method for controlling external disturbance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101110646B (en) * | 2006-07-14 | 2011-07-27 | 夏普株式会社 | Demodulation circuit, IC, and communication device |
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2004
- 2004-12-17 CN CNA2004100931654A patent/CN1790947A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101110646B (en) * | 2006-07-14 | 2011-07-27 | 夏普株式会社 | Demodulation circuit, IC, and communication device |
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