CN102375300A - Power supply circuit for double-optical-filter switching device - Google Patents

Power supply circuit for double-optical-filter switching device Download PDF

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Publication number
CN102375300A
CN102375300A CN2010102574229A CN201010257422A CN102375300A CN 102375300 A CN102375300 A CN 102375300A CN 2010102574229 A CN2010102574229 A CN 2010102574229A CN 201010257422 A CN201010257422 A CN 201010257422A CN 102375300 A CN102375300 A CN 102375300A
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China
Prior art keywords
semiconductor
oxide
metal
resistance
triode
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CN2010102574229A
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Chinese (zh)
Inventor
谢明志
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Priority to CN2010102574229A priority Critical patent/CN102375300A/en
Publication of CN102375300A publication Critical patent/CN102375300A/en
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Abstract

The invention provides a power supply circuit for a double-optical-filter switching device, which comprises an identification module, a power supply mode module, a switching module and a power supply module, wherein the identification module is used for respectively generating a first identification signal or a second identification signal according to the situation that the brightness of external light is lower or higher than the set brightness, and the power supply module is used for generating corresponding power supply voltages according to different power supply modes of the double-optical-filter switching device; and the switching module comprises two connecting nodes connected to the double-optical-filter switching device and is used for loading the power supply voltage to the corresponding connecting node according to the first identification signal and the second identification signal, and the power supply module is connected with an external direct current power supply and generates a working voltage capable of keeping the normal work of the identification module, the power supply mode module and the switching module. The power supply circuit provided by the invention can generate corresponding power supply voltages according to different power supply types, and can be compatible with the double-optical-filter switching devices with different power supply modes.

Description

Two optical filter switch feed circuit
Technical field
The present invention relates to a kind of pair of optical filter switch feed circuit.
Background technology
For make video camera to be imaged on the daytime color undistorted, and clear in night vision at night effect, the charge coupled cell of video camera (Charge Coupled Device, CCD) preceding install additional usually two optical filter switchs (Infrared Cut Removable, ICR).Daytime, ICR switched to infrared fileter, and all infrared lights are filtered to obtain distortionless colour picture.Evening, ICR switched to the visible region interference filter, disturbed veiling glare to eliminate other, made CCD can access imaging clearly.The powering mode of ICR in the market roughly has following three kinds: continued power, pulse power supply and moment power supply.In the prior art, when using the ICR of different powering modes, generally need to use the feed circuit of special this kind of coupling powering mode.Therefore, existing ICR feed circuit do not possess the ability of the ICR of compatible different powering modes.
Summary of the invention
In view of this, be necessary to provide a kind of two optical filter switch feed circuit of two optical filter switchs that can compatible different powering modes.
The present invention provides a kind of pair of optical filter switch feed circuit, and it comprises an identification module, a powering mode module, a handover module and a power module.This identification module is below or above a setting brightness and produces one first identification signal or one second identification signal respectively according to the brightness of extraneous light.This powering mode module is according to the corresponding supply voltage of two optical filter switch various power mode producing.This handover module comprises two connected nodes that are used to be connected to two optical filter switchs, is used for according to this first identification signal and second identification signal, and this supply voltage is loaded on a corresponding connected node.This power module connects an external dc power and produces a WV of keeping this identification module, this powering mode module and this handover module operate as normal.
Compared with prior art; Of the present invention pair of optical filter switch feed circuit can produce corresponding supply voltage according to the various power type; And this supply voltage is loaded on corresponding connected node driving two optical filter switch work, thereby make two optical filter switchs that of the present invention pair of optical filter switch feed circuit can compatible different powering modes.
Description of drawings
Fig. 1 is the circuit diagram of two optical filter switch feed circuit of preferred embodiments of the present invention.
The main element symbol description
Two optical filter switch feed circuit 10
Power module 102
Identification module 104
Powering mode module 106
Handover module 108
External dc power V DC-input
WV V CC
Modular converter U1
Input end VI
Output terminal VO
Feedback end VG
Photoresistance CDS
Resistance R 1, R3, R4, R5, R6, R7, R8,
R9，R10，R11，R12，R13，R14
Switch S 1, S2, S3
Capacitor C 1, C2
Triode Q7, Q 8, Q9
Metal-oxide-semiconductor Q1, Q2, Q3, Q4, Q5, Q6
The first connected node G1
The second connected node G2
Port P Out
Mode port P1, P2, P3
Embodiment
Please refer to Fig. 1, two optical filter switch feed circuit 10 of preferred embodiments of the present invention comprise a power module 102, identification module 104, a powering mode module 106 and a handover module 108.
Power module 102 is used to connect an external dc power V DC-input, and produce a WV V who keeps identification module 104, powering mode module 106 and handover module 108 operate as normal CCParticularly, power module 102 comprises the modular converter U1 of a DC voltage to DC voltage, two resistance R 10, R11 and two capacitor C 1, C2.In this embodiment, this modular converter U1 is that (Low dropout regulator, LDO), it comprises an input end VI, an output terminal VO and a feedback end VG to a low pressure difference linear voltage regulator.External dc power V DC-inputBe connected to input end VI.Through the conversion of modular converter U1, output terminal VO exports a WV V CCResistance R 10, R11 is connected between output terminal VO and the ground, and feedback end VG is connected to resistance R 10, the voltage of exporting with collection output terminal VO between the R11.The feedback voltage that modular converter U1 is gathered through feedback end VG is adjusted the output voltage of output terminal VO, to keep WV V CCStable.Input end VI and output terminal VO are also respectively through capacitor C 1, and C2 ground connection is to filter the alternating current that possibly import or export modular converter U1.
Identification module 104 is used for being below or above a setting brightness and producing one first identification signal or one second identification signal respectively according to the brightness of extraneous light.Concrete, identification module 104 comprises a photoresistance CDS, three resistance R 6, R7, R9 and NPN type triode Q9.Preferably, resistance R 7 is adjustable resistances.Photoresistance CDS and resistance R 7 are connected on WV V CCAnd between the ground.The base stage of triode Q9 is connected between photoresistance CDS and the resistance R 7 through resistance R 9, the emitter grounding of triode Q9, and the collector of triode Q9 is connected to WV V through resistance R 6 CCThe current collection of triode Q9 is the output terminal of identification module 104 very.Photoresistance CDS externally during the light deepening resistance raise, cause the base voltage of triode Q9 also will uprise.It is then opposite when externally light brightens.So, through setting the resistance of resistance R 7, can make the threshold values that the base voltage of triode Q9 arrived triode Q9 conducting or ends when extraneous light changed to required setting brightness.Wherein, set brightness can according to the brightness settings of the environment of daytime when having a common boundary night (as at dusk 6 or morning 6 ambient brightness).When extraneous light is darker than this setting brightness, triode Q9 conducting, its collector produces first identification signal, i.e. a low level.When extraneous light was brighter than this setting brightness, triode Q9 ended, and its collector produces second identification signal, i.e. a high level.
Powering mode module 106 is used for according to two optical filter switchs (Infrared Cut Removable, ICR) various power pattern, the supply voltage that generation is corresponding.Particularly, powering mode module 106 comprises a central processing unit (CPU), a N-channel MOS pipe Q2, a P channel MOS tube Q1, four resistance R 1, R12, R13, R14 and three switch S 1, S2, S3.CPU comprises a port P OutAnd three mode port P1, P2, P3.CPU is according to mode port P1, P2, and the level state of P3 can be by port P OutOutput continues high level, pulse signal or instantaneous high level.Through resistance R 12, R13, R14 are connected to WV V respectively for mode port P1, P2, P3 CC, simultaneously also respectively through switch S 1, S2, S3 is connected to ground.Port P OutBe connected to the grid of metal-oxide-semiconductor Q2, the source ground of metal-oxide-semiconductor Q2, the drain electrode of metal-oxide-semiconductor Q2 is connected to WV V through resistance R 1 CCThe grid of metal-oxide-semiconductor Q1 is connected to the drain electrode of metal-oxide-semiconductor Q2, and the drain electrode of metal-oxide-semiconductor Q1 is connected to WV V CC, the voltage of the source electrode output of metal-oxide-semiconductor Q1 is the supply voltage that powering mode module 106 is produced.
When the powering mode of ICR is continued power, connect switch S1, open switch S 2, S3, so that mode port P1 is a low level, mode port P2, P3 are high level.This moment CPU control port P OutContinue the output high level.So, metal-oxide-semiconductor Q2 conducting, also conducting of metal-oxide-semiconductor Q1, the source electrode output voltage of metal-oxide-semiconductor Q1 approximates WV V CC, for continuing high level.
When the powering mode of ICR is pulse power supply, connect switch S2, open switch S 1, S3, so that mode port P2 is a low level, mode port P1, P3 are high level.This moment CPU control port P OutOutput pulse signal (like pulse-width signal), along with the variation of high-low level in the pulse signal, metal-oxide-semiconductor Q2 and metal-oxide-semiconductor Q1 be also along with conducting or end, thereby make the source electrode output voltage of metal-oxide-semiconductor Q1 also be pulse signal.
When the powering mode of ICR is the moment power supply, connect switch S3, open switch S 1, S2, so that mode port P3 is a low level, mode port P1, P2 are high level.This moment CPU control port P OutExport an instantaneous high level.So, the source electrode output voltage of metal-oxide-semiconductor Q1 also is an instantaneous high level.
Mode port P1 is set, P2, P3 and connected resistance R 12, R13, R14 and three switch S 1, S2, S3 are in order to select CPU output different voltages with different pattern, to adapt to the ICR of different powering modes.Yet be appreciated that in batch production process after ICR confirmed, its powering mode confirmed, this moment, CPU can only export voltage type that should ICR.Perhaps, when the power supply type of the ICR of follow-up selection not simultaneously, only need make CPU output to voltage type that should ICR just can, and need not to change the hardware configuration of circuit.So, mode port P1, P2, the resistance R 12 of P3 and pairing, R13, R14, three switch S 1, S2, S3 also can be provided with.
Since the source ground of metal-oxide-semiconductor Q2, therefore, port P OutOnly need to export one, just can make metal-oxide-semiconductor Q2 conducting greater than zero high level.So, can make 106 couples of port P of powering mode module OutOutput voltage require lower.Therefore, be appreciated that as port P OutThe voltage of the high level of output is higher relatively, and in the time of can directly making metal-oxide-semiconductor Q1 conducting, resistance R 1 and metal-oxide-semiconductor Q2 also can be provided with.
Handover module 108 comprises two the first connected node G1 and the second connected node G2 that are used to be connected to an ICR; Handover module 108 is used for according to first identification signal and second identification signal, and the supply voltage that powering mode module 106 is produced is loaded on a corresponding connected node.Particularly, handover module 108 comprises four resistance R 3, R4, R5 and R8, two NPN type triode Q7, Q8, two N-channel MOS pipe Q4, Q5 and two P channel MOS tube Q3, Q6.The base stage of triode Q8 is connected to the collector of triode Q9 through resistance R 8, the emitter grounding of triode Q8, and the collector of triode Q8 connects WV V through resistance R 4 CCThe base stage of triode Q7 is connected to the collector of triode Q8 through resistance R 5, the emitter grounding of triode Q7, and the collector of triode Q7 connects WV V through resistance R 3 CCMetal-oxide-semiconductor Q3, the grid of Q5 all is connected to the collector of triode Q8, the source ground of metal-oxide-semiconductor Q5, the drain electrode of metal-oxide-semiconductor Q5 is connected to the source electrode of metal-oxide-semiconductor Q3, and the drain electrode of metal-oxide-semiconductor Q3 is connected to the source electrode of metal-oxide-semiconductor Q1.Metal-oxide-semiconductor Q4, the grid of Q6 all is connected to the collector of triode Q7, the source ground of metal-oxide-semiconductor Q6, the drain electrode of metal-oxide-semiconductor Q6 is connected to the source electrode of metal-oxide-semiconductor Q4, and the drain electrode of metal-oxide-semiconductor Q4 is connected to the source electrode of metal-oxide-semiconductor Q1.At this, definition metal-oxide-semiconductor Q3, the node between the Q5 is the first connected node G1, metal-oxide-semiconductor Q4, the node between the Q6 are the second connected node G2.The first connected node G1 and the second connected node G2 are used to connect an ICR.
When extraneous light is darker than setting brightness, the collector of triode Q9 produces one first identification signal, and promptly during a low level, triode Q8 ends, and its collector voltage approximates WV V CC, i.e. high level.Triode Q7 conducting this moment, its collector voltage approximates ground voltage, i.e. low level.So, metal-oxide-semiconductor Q3, Q6 ends, metal-oxide-semiconductor Q4, the Q5 conducting, the supply voltage that power mode module 106 is produced is carried on the second connected node G2, thereby makes ICR realize just changeing (or counter-rotating).To set brightness bright when extraneous light, and the collector of triode Q9 produces one second identification signal, promptly during a high level, and triode Q8 conducting, its collector voltage approximates ground voltage, i.e. low level.This moment, triode Q7 ended, and its collector voltage approximates WV V CC, i.e. high level.So, metal-oxide-semiconductor Q3, the Q6 conducting, metal-oxide-semiconductor Q4, Q5 ends, and the supply voltage that power mode module 106 is produced is carried on the first connected node G1, thereby makes ICR realize counter-rotating (or just changeing).
Triode in this embodiment and metal-oxide-semiconductor have played the effect of switch.Yet, be appreciated that and use the place of triode also can use metal-oxide-semiconductor or other on-off element, use place, metal-oxide-semiconductor road also can use triode or other on-off element.Simultaneously, photoresistance CDS is used for changing resistance according to the brightness of extraneous light, thereby plays the effect of identification extraneous light brightness; Yet be appreciated that; The invention is not restricted to only use photoresistance CDS, also can use other electro-optical pickoff, like photodiode.
Of the present invention pair of optical filter switch feed circuit 10 can be according to the corresponding supply voltage of various power type output; And this supply voltage is loaded on corresponding connected node with drive IC R work, thereby make the ICR that of the present invention pair of optical filter switch feed circuit 10 can compatible different powering modes.
Those skilled in the art will be appreciated that; Above embodiment only is to be used for explaining the present invention; And be not to be used as qualification of the present invention; As long as within connotation scope of the present invention, appropriate change that above embodiment did is all dropped within the scope that the present invention requires to protect with changing.

Claims (10)

1. two optical filter switch feed circuit, it comprises:
An identification module is used for being below or above a setting brightness and producing one first identification signal or one second identification signal respectively according to the brightness of extraneous light;
A powering mode module is used for producing corresponding supply voltage according to two optical filter switch various power patterns;
A handover module comprises two connected nodes that are used to be connected to two optical filter switchs, is used for according to this first identification signal and second identification signal, and this supply voltage is loaded on a corresponding connected node;
A power module is used to connect an external dc power, and produces a WV of keeping this identification module, this powering mode module and this handover module operate as normal.
2. as claimed in claim 1 pair of optical filter switch feed circuit is characterized in that, this power module comprises the modular converter of a DC voltage to DC voltage, two resistance and two electric capacity; This modular converter comprises that one is connected to the input end of this external dc power, an output terminal and a feedback end that is used to export this WV; These two resistance are connected between this output terminal and the ground; This feedback end is connected between these two resistance, and this input end and this output terminal are respectively through these two capacity earths.
3. as claimed in claim 2 pair of optical filter switch feed circuit is characterized in that this modular converter is a low pressure difference linear voltage regulator.
4. as claimed in claim 1 pair of optical filter switch feed circuit; It is characterized in that; This identification module comprises an electro-optical pickoff, first triode of a NPN type and first, second, third resistance, and this electro-optical pickoff and this first resistance are connected between this WV and the ground; The base stage of this first triode is connected between this electro-optical pickoff and this first resistance through this second resistance; The emitter grounding of this first triode, the collector of this first triode is connected to this WV through the 3rd resistance, collector this first identification signal of output or one second identification signal of this first triode.
5. as claimed in claim 4 pair of optical filter switch feed circuit is characterized in that, this electro-optical pickoff is for changing the photoresistance of resistance according to extraneous light.
6. as claimed in claim 4 pair of optical filter switch feed circuit is characterized in that this first resistance is adjustable resistance.
7. as claimed in claim 4 pair of optical filter switch feed circuit; It is characterized in that; This handover module comprises the 4th, the 5th, the 6th, the 7th resistance, second, third triode of NPN type, the 3rd, the 4th metal-oxide-semiconductor of first, second metal-oxide-semiconductor of N raceway groove and P raceway groove; The base stage of this second triode is connected to the collector of this first triode through this first resistance, the emitter grounding of this second triode, and the collector of this second triode connects WV through this second resistance to this; The base stage of the 3rd triode is connected to the collector of this second triode through the 3rd resistance, the emitter grounding of the 3rd triode, and the collector of the 3rd triode connects this WV through the 4th resistance; The grid of this second, third metal-oxide-semiconductor all is connected to the collector of this second triode, the source ground of this second metal-oxide-semiconductor, and the drain electrode of this second metal-oxide-semiconductor is connected to the source electrode of the 3rd metal-oxide-semiconductor, and the drain electrode of the 3rd metal-oxide-semiconductor is connected to this supply voltage; The grid of this first, the 4th metal-oxide-semiconductor all is connected to the collector of the 3rd triode, the source ground of the 4th metal-oxide-semiconductor, and the drain electrode of the 4th metal-oxide-semiconductor is connected to the source electrode of this first metal-oxide-semiconductor, and the drain electrode of the 4th metal-oxide-semiconductor is connected to this supply voltage; Node between this second, third metal-oxide-semiconductor is this first node, and the node between this first, the 4th metal-oxide-semiconductor is this Section Point.
8. as claimed in claim 1 pair of optical filter switch feed circuit; It is characterized in that this powering mode module comprises a central processing unit and one the 5th metal-oxide-semiconductor, this central processing unit comprises a port; This port is by the voltage of this its output of central processing unit control; This port is connected to the grid of the 5th metal-oxide-semiconductor, and the drain electrode of the 5th metal-oxide-semiconductor is connected to this WV, and the source electrode of the 6th metal-oxide-semiconductor is output as this supply voltage.
9. as claimed in claim 8 pair of optical filter switch feed circuit; It is characterized in that the 5th metal-oxide-semiconductor is the N raceway groove, this powering mode module also comprises the 6th metal-oxide-semiconductor and one the 8th resistance of a P raceway groove; This port is connected to the grid of the 6th metal-oxide-semiconductor; The source ground of the 6th metal-oxide-semiconductor, the drain electrode of the 6th metal-oxide-semiconductor is connected to this WV through the 8th resistance, and the grid of the 5th metal-oxide-semiconductor is connected to the drain electrode of the 6th metal-oxide-semiconductor.
10. as claimed in claim 8 pair of optical filter switch feed circuit is characterized in that, this powering mode module also comprises three pull-up resistors and three switches, and this central processing unit also comprises three mode port; These three mode port are connected to this WV through these three pull-up resistors respectively, simultaneously also respectively through these three switch ground connection; When making a mode port be in low level state when all the other two switch opens of a switch connection, this port output of this central processing unit control continues high level, pulse signal or instantaneous high level.
CN2010102574229A 2010-08-19 2010-08-19 Power supply circuit for double-optical-filter switching device Pending CN102375300A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103048852A (en) * 2012-12-14 2013-04-17 广东安居宝数码科技股份有限公司 Conversion driving circuit for mobile optical filters
CN103218967A (en) * 2013-04-25 2013-07-24 京东方科技集团股份有限公司 Ghosting image eliminating circuit and display device
CN105867223A (en) * 2016-04-12 2016-08-17 吉晟光电（深圳）有限公司 Optical filter switching control circuit
CN106711940A (en) * 2016-12-16 2017-05-24 山东北方光学电子有限公司 Protection circuit used for low-light level night vision device
CN110265807A (en) * 2019-06-04 2019-09-20 湖北钒德智能光电有限公司 The contact power supply structure of optical-filter switcher

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Cited By (11)

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Publication number Priority date Publication date Assignee Title
CN103048852A (en) * 2012-12-14 2013-04-17 广东安居宝数码科技股份有限公司 Conversion driving circuit for mobile optical filters
CN103218967A (en) * 2013-04-25 2013-07-24 京东方科技集团股份有限公司 Ghosting image eliminating circuit and display device
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CN105867223B (en) * 2016-04-12 2018-09-25 吉晟光电（深圳）有限公司 Optical fiber switch control circuit
CN106711940A (en) * 2016-12-16 2017-05-24 山东北方光学电子有限公司 Protection circuit used for low-light level night vision device
CN106711940B (en) * 2016-12-16 2018-12-21 山东北方光学电子有限公司 Protection circuit for low-light level night vision device
CN110265807A (en) * 2019-06-04 2019-09-20 湖北钒德智能光电有限公司 The contact power supply structure of optical-filter switcher
CN110265807B (en) * 2019-06-04 2023-12-08 深圳市钒德电子有限公司 Contact type power supply structure of optical filter switcher

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Application publication date: 20120314