CN102375417B - Optical filter switching component control circuit - Google Patents
Optical filter switching component control circuit Download PDFInfo
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- CN102375417B CN102375417B CN201010258947.4A CN201010258947A CN102375417B CN 102375417 B CN102375417 B CN 102375417B CN 201010258947 A CN201010258947 A CN 201010258947A CN 102375417 B CN102375417 B CN 102375417B
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- optical filter
- switching component
- resistance
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Abstract
The invention discloses an optical fiber switching component control circuit, which comprises a photosensitive resistor, a resistor, a plurality of electronic switches, a voltage source, an optical filter switching component, a comparator and a central processing unit, wherein the resistor is connected in series with the photosensitive resistor between the voltage source and the ground; a node between the resistor and the photosensitive resistor is connected to the central processing unit, the optical filter switching component and the comparator through the electronic switch; the output end of the comparator is connected to the central processing unit; the electronic switch switches a conduction state according to the change of a resistance value of the photosensitive resistor, so as to correspondingly switch the voltage difference between two input ends of the optical filter switching component; and the central processing unit judges whether the switching of the optical filter switching component is correct according to a signal input by the electronic switch and a signal input by the comparator. The optical fiber switching component control circuit can judge the abnormality of the switching of the optical filter.
Description
Technical field
The present invention relates to a kind of optical filter switching component control circuit.
Background technology
In order can also to record a video clearly at night, conventionally can on video camera, add the design of infrared light sources, because infrared light sources can cause the problem of the image generation colour cast that video camera photographs, therefore can before the photosensory assembly of video camera, add ICR (IR Cut Filter Removable, optical filter switching component), this optical filter switching component comprises a common optical filter and an infrared filter, when extraneous light is bright, automatically switch to common optical filter, when the external world is rather dark, automatically switch to infrared filter to eliminate colour cast, this optical filter switching component comprises two input ends, by the voltage difference of changing between this two input end, switch common optical filter and infrared filter, as the voltage difference between this two input end be on the occasion of time, switch to common optical filter, and switch to infrared filter while being negative value.But this mode likely has erroneous judgement disconnected time, and operator has no way of learning, and then cause the data of video recording may be unintelligible.
Summary of the invention
In view of foregoing, be necessary to provide a kind of optical filter switching component control circuit that carries out abnormal judgement.
A kind of optical filter switching component control circuit, comprise a photoresistance, one first resistance, the first to the 6th electronic switch, one voltage source, one optical filter switching component, one comparer and a central processing unit, this first resistance and this photoresistance are connected between this voltage source and ground, node between this first resistance and this photoresistance is connected to this second and third electronic switch by this first electronic switch and is also connected to this central processing unit, this second electronic switch is connected to the 4th and the 5th electronic switch, the 3rd and quadrielectron switch between node and the 5th and the node of the 6th electronic switch be connected to respectively two input ends of this optical filter switching component and be connected to respectively in-phase input end and the inverting input of this comparer, the output terminal of this comparer is connected to this central processing unit, this first electronic switch is according to the resistance change switched conductive state of this photoresistance, and then switch this second conducting state to the 6th electronic switch, so that the corresponding voltage difference of switching between these optical filter switching component two input ends, this central processing unit judges that according to the signal of the signal of this first electronic switch input and the input of this comparer whether the switching of this optical filter switching component is correct.
Compare prior art, optical filter switching component control circuit of the present invention is read the signal of this first electronic switch input and is read the signal of this comparer input by this central processing unit, by this two signal relatively, can judge this optical filter switching component and whether make correct switching, very convenient.
Accompanying drawing explanation
In conjunction with better embodiment, the present invention is described in further detail with reference to the accompanying drawings:
Fig. 1 is the circuit diagram of optical filter switching component control circuit better embodiment of the present invention.
Main element symbol description
Optical filter switching component control circuit 100
Photoresistance RT
Resistance R 1-R6
Transistor Q1, Q2
Field effect transistor Q3-Q6
Diode D1-D4
Voltage source Vcc
Optical filter switching component U1
Comparer U2
Central processing unit U3
Embodiment
Please refer to Fig. 1, the colour cast that optical filter switching component control circuit 100 of the present invention produces for eliminating infrared light sources on video camera, its better embodiment comprises a photoresistance RT, six resistance R 1-R6, two NPN transistor Q1 and Q2, two P-channel field-effect transistor (PEFT) transistor Q3 and Q5, two N slot field-effect transistor Q4 and Q6, four diode D1-D4, a voltage source Vcc, an optical filter switching component U1, a comparer U2, a central processing unit (CPU) U3.Wherein, the resistance value of this photoresistance RT reduces with the rising of light luminance, and increases with the decline of light luminance, and other embodiment also can be contrary.This optical filter switching component U1 carries out the switching of common optical filter and infrared filter by changing voltage difference between its two input end, specific works principle is prior art, no longer illustrates herein.This central processing unit U3 is the main processing components of video camera inside, and it is also responsible for such as tasks such as photographies, does not also remake and illustrates herein.
This resistance R 1 and this photoresistance RT are connected between this voltage source Vcc and ground, node between this resistance R 1 and this photoresistance RT is connected to the base stage of this transistor Q1 by resistance R 2, the grounded emitter of this transistor Q1, the collector of this transistor Q1 by resistance R 3 be connected to this voltage source Vcc, by resistance R 4 be connected to this transistor Q2 base stage, by resistance R 5 be connected to this two field effect transistors Q3 and Q4 grid, be connected to this central processing unit U3.The grounded emitter of this transistor Q2, collector is connected to this voltage source Vcc by resistance R 6 and is also connected to the grid of this two field effect transistors Q5 and Q6.
The drain electrode of this two field effect transistors Q3 and Q5 is connected to this voltage source Vcc, and the source electrode of this two field effect transistors Q3 and Q5 is connected to respectively the drain electrode of this two field effect transistors Q4 and Q6.The source grounding of this two field effect transistors Q4 and Q6.The anode of this diode D1-D4 and negative electrode are connected to respectively source electrode and the drain electrode of this field effect transistor Q3-Q6, and this diode D1-D4, for the protection of this field effect transistor Q3-Q6, also can delete as required.Two voltage input ends of this optical filter switching component U1 are connected to respectively node between this two field effect transistors Q3 and Q4 and the node between this two field effect transistors Q5 and Q6.Two voltage input ends of this optical filter switching component U1 are also connected to respectively in-phase input end and the inverting input of this comparer U2.The voltage end of this comparer U2 is connected to this voltage source Vcc, earth terminal ground connection, and output terminal is connected to this central processing unit U3.In other embodiment, this two transistor Q1 and Q2, this field effect transistor Q3-Q6 also can select the electronic switch of other type.
During work, this transistor Q1 conducting state is determined by the resistance value of this photoresistance RT, when extraneous light luminance is elevated to a certain setting value, the resistance value correspondence of this photoresistance RT drops to a certain setting value, now this transistor Q1 cut-off, and then the collector of this transistor Q1 becomes high level, this central processing unit U3 receives this high level signal, so this transistor Q2 conducting, and then this two field effect transistors Q4 and Q5 conducting, and this two field effect transistors Q3 and Q6 cut-off, now the in-phase input end of this comparer U2 is low level, and inverting input is high level, this optical filter switching component U1 switches to common optical filter, the output terminal output low level of this comparer U2 is given this central processing unit U3.
In like manner, when extraneous light luminance drops to this setting value, the resistance value correspondence of this photoresistance RT rises to this definite value, now this transistor Q1 conducting, and then the collector of this transistor Q1 becomes low level, this central processing unit U3 receives this low level signal, so this transistor Q2 cut-off, and then this two field effect transistors Q4 and Q5 cut-off, and this two field effect transistors Q3 and Q6 conducting, now the in-phase input end of this comparer U2 is high level, and inverting input is low level, this optical filter switching component U1 switches to infrared filter, the output terminal output high level of this comparer U2 is given this central processing unit U3.
This central processing unit U3 is intersected and is compared to judge whether this optical filter switching component U1 has carried out correct switching by the signal of the collector of this transistor Q1 to reading and the signal of the output terminal of this comparer U2.Refer to following table:
| Q1 collector | U2 output terminal | RT resistance value | U1 state | U3 judgement |
| 0 | 1 | ＞Rm | Forward | Normally |
| 1 | 0 | ＜Rm | Reversion | Normally |
| 0 | 0 | -- | -- | Extremely |
| 1 | 1 | -- | -- | Extremely |
Wherein, upper table " 1 " represents high level, and " 0 " represents low level, and " Rm " represents the setting value of this photoresistance RT, " forward " represents that this optical filter switching component U1 switches to infrared filter, and " reversion " represents that this optical filter switching component U1 switches to common optical filter.Whether this central processing unit U3 has made correct switching according to judging this optical filter switching component U1 after upper table comparison, to make subsequent operation according to judged result, as occurred, extremely, sends prompt tone to inform user, like that.As can be seen here, whether applying optical filter switching component control circuit 100 of the present invention, can effectively to judge the switching of optical filter correct, improved shooting quality.
Claims (4)
1. an optical filter switching component control circuit, comprise a photoresistance, one first resistance, the first to the 6th electronic switch, one voltage source, one optical filter switching component, one comparer and a central processing unit, this first resistance and this photoresistance are connected between this voltage source and ground, node between this first resistance and this photoresistance is connected to this second and third electronic switch by this first electronic switch, also by this first electronic switch, be connected to this central processing unit, this second electronic switch is connected to the 4th and the 5th electronic switch, the 3rd and quadrielectron switch between node and the 5th and the node of the 6th electronic switch be connected to respectively two input ends of this optical filter switching component and be connected to respectively in-phase input end and the inverting input of this comparer, the output terminal of this comparer is connected to this central processing unit, this first electronic switch is according to the resistance change switched conductive state of this photoresistance, and then switch this second conducting state to the 6th electronic switch, so that the corresponding voltage difference of switching between these optical filter switching component two input ends, this central processing unit judges that according to the signal of the signal of this first electronic switch input and the input of this comparer whether the switching of this optical filter switching component is correct.
2. optical filter switching component control circuit as claimed in claim 1, is characterized in that: the resistance value of this photoresistance reduces with the rising of light luminance, and increases with the decline of light luminance.
3. optical filter switching component control circuit as claimed in claim 2, it is characterized in that: this first and second electronic switch is NPN transistor, the the 3rd and the 5th electronic switch is P-channel field-effect transistor (PEFT) transistor, the the 4th and the 6th electronic switch is N slot field-effect transistor, node between this first resistance and this photoresistance is connected to the base stage of this first electronic switch by one second resistance, the grounded emitter of this first electronic switch, the collector of this first electronic switch is connected to this voltage source by one the 3rd resistance, by one the 4th resistance, be connected to the base stage of this second electronic switch, by one the 5th resistance, be connected to the 3rd and the grid of quadrielectron switch, be connected to this central processing unit, the grounded emitter of this second electronic switch, collector is connected to this voltage source by one the 6th resistance, and collector is also connected to the 5th and the grid of the 6th electronic switch, the 3rd and the drain electrode of the 5th electronic switch be connected to this voltage source, source electrode is connected to respectively the 4th and the drain electrode of the 6th electronic switch, the 4th and the source grounding of the 6th electronic switch.
4. optical filter switching component control circuit as claimed in claim 3, is characterized in that: this optical filter switching component control circuit also comprises four diodes, and the anode of this diode and negative electrode are connected to respectively the 3rd source electrode to the 6th electronic switch and drain electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010258947.4A CN102375417B (en) | 2010-08-20 | 2010-08-20 | Optical filter switching component control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010258947.4A CN102375417B (en) | 2010-08-20 | 2010-08-20 | Optical filter switching component control circuit |
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| Publication Number | Publication Date |
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| CN102375417A CN102375417A (en) | 2012-03-14 |
| CN102375417B true CN102375417B (en) | 2014-03-26 |
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| CN201010258947.4A Active CN102375417B (en) | 2010-08-20 | 2010-08-20 | Optical filter switching component control circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104062919A (en) * | 2014-06-20 | 2014-09-24 | 华为技术有限公司 | Circuit for controlling coil, device for controlling light filter and camera |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1295721A (en) * | 1998-02-02 | 2001-05-16 | 优尼爱克斯公司 | Organic diodes with switchable photosensitivty |
| CN1971927A (en) * | 2005-07-21 | 2007-05-30 | 索尼株式会社 | Physical information acquiring method, physical information acquiring device and semiconductor device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000304916A (en) * | 1999-04-23 | 2000-11-02 | Mitsubishi Heavy Ind Ltd | Plate for printing color filter, its production and apparatus for producing color filter |
| JP2005221735A (en) * | 2004-02-05 | 2005-08-18 | Asahi Kasei Chemicals Corp | Method for manufacturing cylindrical printing original plate on which laser engraving is possible |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1295721A (en) * | 1998-02-02 | 2001-05-16 | 优尼爱克斯公司 | Organic diodes with switchable photosensitivty |
| CN1971927A (en) * | 2005-07-21 | 2007-05-30 | 索尼株式会社 | Physical information acquiring method, physical information acquiring device and semiconductor device |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2000-304916A 2000.11.02 |
| JP特开2005-221735A 2005.08.18 |
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Effective date of registration: 20161013 Address after: 225599 Cao village, Jiangyan Town, Jiangyan District, Jiangsu, Taizhou Patentee after: Taizhou wisdom Software Park Co., Ltd. Address before: Tianhe District Tong East Road Guangzhou city Guangdong province 510665 B-101 No. 5, room B-118 Patentee before: Guangdong Gaohang Intellectual Property Operation Co., Ltd. |