CN208691388U - A kind of supplementary lighting sources and light supplementing device of camera and video camera with it - Google Patents
A kind of supplementary lighting sources and light supplementing device of camera and video camera with it Download PDFInfo
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- CN208691388U CN208691388U CN201821393044.5U CN201821393044U CN208691388U CN 208691388 U CN208691388 U CN 208691388U CN 201821393044 U CN201821393044 U CN 201821393044U CN 208691388 U CN208691388 U CN 208691388U
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Abstract
The utility model discloses a kind of supplementary lighting sources and with its light supplementing device of camera and video camera, supplementary lighting sources include: the first light filling chip and the second light filling chip, the sending light of the first light filling chip is in 650nm~850nm wave band, and the second light filling chip is the white light that colour temperature is 2700K~6500K；The first light filling chip and the second light filling chip are opened simultaneously, and the sending light of the second light filling chip is mixed with the sending light of the first light filling chip, form exposure compensating light；The scope control of the current strength for being input to the first light filling chip and the ratio for the current strength size for being input to the second light filling chip is 1:10~1:200.The case where the utility model the case where mixing the light of two kinds of different-wavebands, can improve existing white light dazzling (dazzle) in this way, can also improve recognition of face by the reflective attribute of analysis face and license plate, Car license recognition.
Description
Technical field
The utility model relates to technical field of video monitoring, more particularly to a kind of supplementary lighting sources and with its camera shooting
Machine light compensating apparatus and video camera.
Background technique
At present in the video camera of recognition of face, vehicle identification and night color image, since night ambient light is serious
Deficiency, most of video camera carries out light filling usually using white light, but the light that light compensating lamp issues not only can be to artificial at certain
Dazzle influence the discrimination of face and license plate and since face and license plate can all reflect the light of certain wave band.
Thus, it is desirable to have a kind of technical solution come overcome or at least mitigate in the drawbacks described above of the prior art at least one
It is a.
Utility model content
The purpose of this utility model is to provide a kind of supplementary lighting sources to lack to overcome or at least mitigate the above-mentioned of the prior art
At least one of fall into.
To achieve the above object, the utility model provides a kind of supplementary lighting sources, and supplementary lighting sources include: the first light filling core
The sending light of piece and the second light filling chip, the first light filling chip is in 650nm~850nm wave band, second light filling
Chip is the warm white that colour temperature is 3000K；The first light filling chip and the second light filling chip are opened simultaneously, second light filling
The sending light of chip is mixed with the sending light of the first light filling chip, forms exposure compensating light；It is input to first light filling
The current strength of chip be input to the second light filling chip current strength size ratio scope control be 1:10~
1:200。
Further, the sending light of the first light filling chip is in 700nm~760nm wave band, second light filling
Chip is the warm white that colour temperature is 3000K.
Further, the current strength for being input to the first light filling chip is 800mA, is input to the electricity of the warm white
Intensity of flow is 5~10mA.
Further, the power bracket of the first light filling chip is 0.5W~3W, the power of the second light filling chip
Range is 0.05W~1W.
Further, the irradiation zone of the first light filling chip and the second light filling chip is in cone-shaped, two irradiation
The light for the overlapping range that region is formed is the exposure compensating light, and the overlapping range closes on the first light filling chip and the
The setting of two light filling chips.
Further, the first light filling chip and the second light filling chip package are described thermally conductive in a thermally conductive board group
Board group is installed on light filling installation base plate, wherein the thermally conductive board group includes thermally conductive articulamentum and heat-radiating substrate, two benefits
Optical chip passes through thermally conductive articulamentum and is fixed on heat-radiating substrate, alternatively, multiple first light filling chips and multiple second are mended
Optical chip alternating is arranged apart on light filling installation base plate.
Further, the first light filling chip and the second light filling chip connect in parallel or serial fashion, wherein simultaneously
In the case of connection connection: the first light filling chip and the second light filling chip each by corresponding encapsulated circuit pin with it is described
Current control circuit connection outside supplementary lighting sources；In the case of series connection: the first light filling chip and second is mended
The both ends for the series circuit that optical chip is constituted pass through the current control electricity outside encapsulated circuit pin and the supplementary lighting sources
Road connection.
The utility model also provides a kind of light supplementing device of camera, and light supplementing device of camera includes supplementary lighting sources, lens, peace
Loading board component and current control circuit, in which: the supplementary lighting sources are arranged in the one or both sides of the camera lens of video camera, the benefit
Radiant goes out in light optical path to set the lens, and the electric current that the current control circuit control is conveyed to the supplementary lighting sources is big
Small, the supplementary lighting sources are mounted on video camera by the mounting plate component, wherein the supplementary lighting sources are claim 1
To supplementary lighting sources described in any one of 7.
Further, the current control circuit includes the first light filling control circuit and the second light filling control circuit, described
The output end of first light filling control circuit connects the encapsulated circuit pin of the first light filling chip, the second light filling control electricity
The output end on road connects the encapsulated circuit pin of the second light filling chip.
Further, the first light filling control circuit has the first light filling input terminal and the first light filling output end, described
First light filling output end connects the encapsulated circuit pin of the first light filling chip；The first light filling control circuit includes first
Constant-current driven chip, first constant-current driven chip have the switch for connecting the first light filling input terminal by diode defeated
Out pin, connect by resistance the first light filling input terminal LED current detection pin, peripheral control unit connected by resistance
The chip operation enable pin of PWM pin, connection the first light filling input terminal chip input voltage pin；The LED
Be provided with the current-limiting circuit between current sense pin and the first light filling input terminal, the LED current detection pin and
Current-limiting circuit indirectly；The first light filling input terminal is grounded by the first filter circuit；The switch output pin passes through
First storage capacitor connects the first light filling output end；Current stabilization circuit is set between the anode and cathode of the first light filling output end；
The current-limiting circuit includes the first resistor and second resistance being connected in parallel；First filter circuit includes be connected in parallel
One capacitor and the second capacitor；The current stabilization circuit includes the third capacitor and the 4th capacitor being connected in parallel.
Further, the second light filling control circuit has the second light filling input terminal and the second light filling output end, described
Second light filling output end connects the encapsulated circuit pin of the second light filling chip；The second light filling chip includes the second constant current
Driving chip, second constant-current driven chip have the switch efferent duct that output head anode is connected by the second storage capacitor
Foot is connected to the boosting pin switched between output pin and the second storage capacitor L3, connection second by boost capacitor
The power input pin of light filling input terminal, output current feedback pin, the connection peripheral control unit being grounded by RC filter circuit
PWM pin constant-current driven chip model selection pin；The second filter circuit is set between the second light filling input terminal and ground,
Flying capcitor between the anode and cathode of the second light filling output end, the second light filling negative pole of output end are connect by resistance
Ground；Second filter circuit includes the third capacitor and the 4th capacitor being connected in parallel.
The utility model also provides a kind of video camera, and video camera includes light supplementing device of camera as described above.
The utility model relates to shoot the monitoring equipment field of recognition of face, vehicle identification and night color image and this is several
Kind purposes is integrated in the monitoring equipment field in a video camera.
The utility model is mixed the light of two kinds of different-wavebands by the reflective attribute of analysis face and license plate, this
The case where sample can improve the case where existing white light dazzling (dazzle), can also improve recognition of face, Car license recognition.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of one embodiment of video camera provided by the utility model；
Fig. 2 a is the structure composition schematic diagram of one embodiment of supplementary lighting sources of encapsulating structure shown in FIG. 1；
Fig. 2 b is the structure composition schematic diagram of another embodiment of supplementary lighting sources of encapsulating structure shown in FIG. 1；
Fig. 2 c is the side view of the supplementary lighting sources of encapsulating structure shown in Fig. 2 b；
Fig. 2 d is the structure composition schematic diagram of the another embodiment of supplementary lighting sources of encapsulating structure shown in FIG. 1；
Fig. 3 is a kind of electrical block diagram of supplementary lighting sources shown in Fig. 2 a and Fig. 2 b；
Fig. 4 is another electrical block diagram of supplementary lighting sources shown in Fig. 2 a and Fig. 2 b；
Fig. 5 is the schematic diagram of the first light filling control circuit in supplementary lighting sources shown in FIG. 1；
Fig. 6 is the schematic diagram of the second light filling control circuit in supplementary lighting sources shown in FIG. 1.
Specific embodiment
In the accompanying drawings, same or similar element is indicated using same or similar label or there is same or like function
Element.The embodiments of the present invention are described in detail with reference to the accompanying drawing.
Term " center ", " longitudinal direction ", " transverse direction ", "front", "rear", "left", "right", " perpendicular in the description of the present invention,
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "top", "bottom" "inner", "outside" is orientation based on the figure or position
Relationship is merely for convenience of describing the present invention and simplifying the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore should not be understood as to scope of protection of the utility model
Limitation.
As shown in Figure 1, light compensating lamp provided by the present embodiment includes supplementary lighting sources 1, lens 2, light filling installation base plate 3 and electricity
Flow control circuit, in which: supplementary lighting sources 1 are arranged in 4 one or both sides of camera lens of video camera, in the insufficient feelings of ambient light
Reference object is treated under shape carries out light filling.Going out in light optical path for supplementary lighting sources 1 sets lens 2, to reach the effect of optically focused by lens 2
Fruit, to improve the utilization rate and light intensity of supplementary lighting sources 1.Lens 2 generally use total internal reflection lens, can effectively adjust light filling light
The propagation path for the light that source issues can rationalize bigizationner using light-source brightness in this way, can also pass through the design of lens
To meet the light-emitting angle of camera lens.Lens 2 are fixedly installed to the shell of the front end assemblies 5 of video camera using mode for dispensing glue.Electricity
Flow control circuit controls the size of current for being conveyed to supplementary lighting sources, to control the luminous intensity of supplementary lighting sources.Supplementary lighting sources 1 pass through
Light filling installation base plate 3 is mounted on the front end assemblies 5 of video camera, and the specific implementation of light filling installation base plate 3 is in following reality
Applying in example to be specifically described in detail.
In one embodiment, supplementary lighting sources 1 are arranged to by the combination of the first light filling chip 11 and the second light filling chip 12
The sending light of form, the first light filling chip 11 is in first band, and the sending light of the second light filling chip 12 is in the second wave
Section, the sending light of the second light filling chip 12 are mixed with the sending light of the first light filling chip 11, form exposure compensating light.The present embodiment
Supplementary lighting sources by adjusting the wavelength of the first light filling chip in first band, improve the discrimination for treating reference object, this
Embodiment passes through the sending light of the second light filling chip also by the way that the second light filling chip is arranged on the basis of the first light filling chip
To adjust the color with the sending light mixed exposure compensating light of the first light filling chip, the mixed light for issuing supplementary lighting sources
Color is softer, avoids to artificial into dazzle.
Preferably, the irradiation zone of the first light filling chip 11 and the second light filling chip 12 is in cone-shaped, the first light filling chip
The light for the overlapping range that the irradiation zone of 11 irradiation zone and the second light filling chip 12 is formed is the exposure compensating light, and institute
It states overlapping range and closes on the first light filling chip 11 and the setting of the second light filling chip 12.
Those of ordinary skill in the art could be aware that: the colour of skin of face is generally divided into yellow, black and brown, license plate
General to use blue bottom wrongly written or mispronounced character, the face and license plate of the different colours of skin have different degrees of reflection category to the spectrum of different wave length
Property.
One group of experimental data is shown: the face of different colours of skin reflectivity highest when wavelength is 650nm, after 650nm
Face reflectivity gradually decreases.Reflectivity is higher, and under the conditions of of the same race, the light quantity received by video camera acquisition chip is more,
It is easier to be identified, so selection wavelength is greater than the light source of 650nm.
Another group of experimental data is shown: the white font of license plate to the spectral reflectivity of 400nm~800nm entire scope all
It is relatively high, and blue bottom is higher to spectral reflectivity of the central wavelength near 450nm, and to 600nm~800nm wave band
Reflectivity is very low, and since 800nm, reflectivity is begun to ramp up again.Therefore, it in order to preferably differentiate license plate number, needs to make vehicle
The background color of board and the reflective contrast of font component are big.Using the supplementary lighting sources between 600~800nm, the background color of license plate is anti-
Light rate is low, and the reflecting rate of font is high, contrast both in this way be it is highest, light source using this wavelength band is to setting vehicle
The video camera of board carries out light filling, is conducive to the identification of license plate number.
Therefore, the identification demand of the present embodiment comprehensive face and license plate, by the waveband selection of supplementary lighting sources 1 be 650nm~
850nm, is also beneficial to improve the identification to face and license plate at the case where can improving existing white light dazzling (dazzle) in this way.
It should be noted that the spectrum that wave band is 650nm~850nm is concentrated mainly on red light region.In actual application
In, the light source of this wave band in road occupation is easy that driver or pedestrian is made to be mistakenly considered traffic when viewing at a distance
Red light in lamp misleads pedestrian.
According to the correlation theory of colorimetry, by being mixed into the light of other colors in a kind of light source of color, thus it is possible to vary
The color of current light.In order to avoid the supplementary lighting sources 1 of wave band between above-mentioned 650nm~850nm are mistakenly considered in traffic lights by people
Red light, the present embodiment is by the way of the second light filling.And the first band that the first light filling chip 11 issues light is set as
650nm~850nm, the light issued by the second light filling chip 12 issue light with the first light filling chip 11 and mix, and this second mends
The mode of light can cover the feux rouges of the first light filling chip 11 sending, therefore, both avoid misleading user, and can reach clear
Identify the demand of face and license plate.
In order to keep supplementary lighting sources 1 not shown in red, the color for the light that the second light filling chip 12 issues can be white,
White light is mixed into feux rouges, can the red of feux rouges showed is thin out, shoal, and existing red traffic light hair can be different from
Red out.Second light filling chip 12 issues the implementation of white light, such as: the capable of emitting white light of blue chip laser fluorescence powder, purple
Outer ray laser fluorescent powder also issues white light.
The quantity of second light filling chip 12 can be 1 or more (such as 2).The colour temperature of second light filling chip 12 exists
Between 2700k~6500k.First light filling chip 11 is combined with the second light filling chip 12 for issuing white light, can remove red expose now
As not generating dazzle, being conducive to the recognition success rate for improving video camera.Light compensating lamp is in practical application provided by the present embodiment
In, there are mainly two types of application modes: one is recognitions of face and Car license recognition mode, use the first light filling of 650nm~850nm
Supplementary lighting sources of the chip 11 as monitoring device, the power bracket of the first light filling chip 11 are 0.5W~3W, the second light filling chip
12 power bracket is 0.05W~1W, white light power consumption very little.Another kind be under night full color mode, can close 650nm~
The first light filling chip 11 of 850nm, supplementary lighting sources of the second light filling chip 12 as video camera.The present embodiment can be at same
Night color mode and the multiple functions such as recognition of face and Car license recognition mode are realized in video camera.
In one embodiment, in order to keep supplementary lighting sources 1 not shown in red, the face for the light that the second light filling chip 12 issues
Color is also possible to other colors, such as issues the light of 450nm~620nm wave band.Specifically, such as: such as central wavelength is 580nm
Yellow light, the color of finally mixed light is orange-yellow.Also such as: the central wavelength of the sending light of the second light filling chip 12 is
The face of the mixed light of first light filling chip 11 of the blue light of 460nm, the second last light filling chip 12 and 650nm~850nm wave band
Color is purple light or inclined blue light.Human eye has different susceptibilitys, human eye is to the feux rouges of 730nm for the light of different colours
Photosensitive coefficient is 0.00052, and human eye is 0.06 to the photosensitive coefficient of the blue light of 460nm, as long as so being mixed into very low power indigo plant
Light can then blend purple light and inclined blue light, and the identification of license plate is not also impacted.
As shown in Figure 2 a, in one embodiment, the first light filling chip 11 and the second light filling chip 12 are LED chip,
Supplementary lighting sources 1 use encapsulating structure.
Such as: the first light filling chip 11 and the second light filling chip 12 are encapsulated in a thermally conductive board group, the thermally conductive board group
It is installed on light filling installation base plate, wherein the thermally conductive board group includes thermally conductive articulamentum (such as: Eutectic Layer or elargol layer) 6
With heat-radiating substrate 7, the first light filling chip 11 and the second light filling chip 12 are fixed to heat-radiating substrate 7 by thermally conductive articulamentum 6
On.Wherein, the effect of thermally conductive articulamentum 6 is mainly reflected in: the first light filling chip 11 and the second light filling chip 12 being connected to scattered
On hot substrate 7, heat-radiating substrate 7 is welded on light filling installation base plate 3.
Thermally conductive articulamentum 6 has capacity of heat transmission, can enhance the heat-sinking capability of device in this way.Heat-radiating substrate 7 can be adopted
With ceramic substrate, ceramic substrate has excellent heat-sinking capability, and temperature capability is high, as the first light filling chip 11 and second
The operating temperature of supplementary lighting sources 1 can be effectively reduced in the heat-radiating substrate of light filling chip 12.
Light filling installation base plate 3 is using aluminum substrate, then aluminum substrate is screwed to the front end for being mounted on video camera
On component 5.At this point, the heat distributed in 12 luminescence process of the first light filling chip 11 and the second light filling chip is passed from heat-radiating substrate 7
Light filling installation base plate 3 is led, then is transmitted to the front end assemblies 5 of video camera by light filling installation base plate 3, finally by front end assemblies
5 shell is scattered to heat in the external environment of video camera.
In one embodiment, as shown in Fig. 2 b and Fig. 2 c, the first light filling chip 11 and the second light filling chip 12 are LED
Chip, supplementary lighting sources 1 are encapsulating structure, wherein multiple first light filling chips 11 and multiple second light filling chips 12 alternately separate
It is arranged on substrate.That is, the encapsulating structure may include the first light filling chip and more power that a power is 3W
It is the second light filling chip of 0.05W.The encapsulating structure also may include more power be 1.5W the first light filling chip and more
Power is the second light filling chip of 0.05W, and the first light filling chip and the second light filling chip alternating are arranged apart on substrate.This reality
The encapsulating structure of example is applied using COB (chip on board) form, substrate is the aluminum substrate 3 being mentioned above, and first at this time is mended
Optical chip and the second light filling chip are directly electrically connected aluminum substrate 3, to save the elargol and encapsulated layer in conventional encapsulation.
In one embodiment, as shown in Figure 2 d, the second light filling chip 12 be coated in the first light filling chip 11 outside it is glimmering
Light bisque 16.For example, the color for the light that the first light filling chip 11 issues is red, then can choose phosphor powder layer 16, utilize
The light that phosphor powder layer 16 issues is mixed with the feux rouges that the first light filling chip 11 issues, the color energy of the exposure compensating light formed in this way
The light for enough making human eye slightly see or can't see that the first light filling chip issues, to also function to the effect for weakening red exposure.
In one embodiment, in encapsulating structure, the first light filling chip 11 and the second light filling chip 12 can be using figures
The connection of parallel way shown in 3, at this point, the first light filling chip 11 has the first encapsulated circuit pin 13, the second light filling chip
12 have the second encapsulated circuit pin 14.First light filling chip 11 and the second light filling chip 12 are each by corresponding encapsulation electricity
Pass foot is connect with the current control circuit outside supplementary lighting sources 1, that is, the first light filling chip 11 passes through the first encapsulated circuit pin
13 connect with the current control circuit outside supplementary lighting sources 1；Second light filling chip 12 passes through the second encapsulated circuit pin 14 and benefit
Current control circuit connection outside radiant 1.
In one embodiment, the first light filling chip 11 and the second light filling chip 12 can also be using the series connection sides in Fig. 4
Formula connection, at this point, the both ends for the series circuit that the first light filling chip 11 and the second light filling chip 12 are constituted encapsulate electricity by third
Pass foot 15 is connect with the current control circuit outside supplementary lighting sources 1.
In one embodiment, current control circuit includes the first light filling control circuit 8 and the second light filling control circuit 9,
Wherein, for the first light filling control circuit 8 in a manner of constant current driving, control is input to the big of the current strength of the first light filling chip 11
Small, it is the first light filling current strength which, which is hereinafter referred to as, to control the luminous intensity of the first light filling chip 11.Second mends
For light control circuit 9 also in a manner of constant current driving, control is input to the size of the current strength of the second light filling chip 12, the electric current
It is the second light filling current strength that intensity, which is hereinafter referred to as, to control the luminous intensity of the second light filling chip 12.First light filling electric current is strong
The scope control of degree and the ratio of the second light filling current strength size is 1:10~1:200, in practice it has proved that the proportional region is neither
White light can be made too dazzling, and feux rouges can be hidden.
Fig. 5 shows a kind of implementation of the first light filling control circuit 8, as shown in figure 5, the first light filling control circuit
8 have the first light filling input terminal IR and the first light filling output end, and IRLEDO+ is the anode of the first light filling output end, and IRLEDO- is
The cathode of first light filling output end, the positive IRLEDO+ and cathode IRLEDO- of the first light filling output end are mended for connecting first
The current input terminal of optical chip 11.
First light filling control circuit 8 includes the first constant-current driven chip UG1, and the model of the first constant-current driven chip UG1 can
To be SYHV12ABC.In figure, the foot 1 of the first constant-current driven chip UG1 is switch output pin, and foot 2 is earth-return pin, foot 3
It is test pin, foot 4 is chip operation enable pin, and foot 5 is chip input voltage pin, and foot 6 is LED current detection pin.
Foot 1 passes through the afterflow two that the first light filling of diode D16 connection input terminal IR, diode D16 are asynchronous DCDC chips
Pole pipe.Foot 6 is used to solve the resistance station of radiation problem by the first light filling of resistance R247 connection input terminal IR, resistance R247.
Foot 4 passes through the PWM pin MAIN LED CTL A1 of resistance R246 connection peripheral control unit, is conveyed to foot 4 by peripheral control unit
Pwm signal, control the first light filling control circuit 8 output size of current.Resistance R246 is used to solve the resistance of radiation problem
Station.Foot 5 all connects the first light filling input terminal IR, and foot 2 and foot 3 are all grounded.It is arranged between foot 6 and the first light filling input terminal IR
Current limit circuit 81, foot 6 and current-limiting circuit 81 indirectly.Current-limiting circuit 81 is used to control to flow through on the first light filling chip 11
Current maxima.Specifically, current-limiting circuit 81 includes the first resistor R249 and second resistance R248 being connected in parallel, first resistor
0.125 Ω of resistance value after R249 and second resistance R248 are in parallel.The current strength for flowing through the first light filling chip 11 is 0.1/0.125
(A)=0.8A.First light filling input terminal IR is grounded by the first filter circuit 82, and the first filter circuit 82 includes being connected in parallel
First capacitor C273 and the second capacitor C270 is filtered the first light filling input terminal IR, prevents input voltage unstable.Foot 1 is logical
Cross the first storage capacitor L2 connection output end IRLEDO-.Current stabilization circuit 83 is set between output end IRLEDO+ and IRLEDO-.Surely
Current circuit 83 includes the third capacitor C274 and the 4th capacitor C269 being connected in parallel, for inhibiting the electric current of the first light filling chip 11
Ripple guarantees that the electric current of the first light filling chip 11 is stablized.
Fig. 6 shows a kind of implementation of the second light filling control circuit 9, as shown in fig. 6, the second light filling control circuit
9 have the second light filling input terminal VIN and the second light filling output end, and LED+ is the anode of the second light filling output end, LED- second
The cathode of light filling output end, the second light filling output head anode LED+ and cathode LED- are used to connect the electric current of the second light filling chip 12
Input terminal.
Second light filling control circuit 9 includes the second constant-current driven chip UW2, and the model of the second constant-current driven chip UW2 can
To be TPS54201.In figure, the foot 1 of the second constant-current driven chip UW2 is earth-return pin, and foot 2 is switch output pin, foot 3
It is power input pin, foot 4 is output current feedback pin, and foot 5 is constant-current driven chip model selection pin, and foot 6 is boosting
Pin, foot 6 control SW output signal.
The second filter circuit 91 is set between second light filling input terminal VIN and ground, the second filter circuit 91 includes being connected in parallel
Third capacitor C7 and the 4th capacitor C8, the second light filling input terminal VIN is filtered, prevents input voltage unstable.Foot 2 passes through
Second storage capacitor L3 connection output end LED+.Foot 6 is connected between foot 2 and the second storage capacitor L3 by boost capacitor C6.
Boost capacitor C6 has boosting, and the upper tube of the second light filling control circuit 9 of control is opened.Foot 3 connects the second light filling input terminal
VIN.Foot 4 is also grounded by capacitor C9 by resistance R3 connection output end LED-, foot 4.Resistance R3 and capacitor C9 composition RC filtering
Circuit and foot 4 constitute a pole, guarantee loop bandwidth and stability.Foot 5 connects the PWM pin of peripheral control unit, by outer
Portion's controller is conveyed to the pwm signal of foot 5, the size of current of control the first light filling control circuit 8 output.The duty ratio of PWM is determined
Surely the size of electric current is exported, the electric current of the warm white in the present embodiment is 1mA, and the duty ratio of PWM is 1%.
Flying capcitor C10 between second light filling output head anode LED+ and the second light filling negative pole of output end LED-, capacitor
C10 reduces current fluctuation, guarantees that the second light filling chip 12 works as far as possible and marking for stablizing the second light filling current strength of output
Quasi- constant current mode prevents the second light filling chip 12 from flashing.Output end LED- is grounded by resistance R4, and resistance R4 is for detecting
The size of current of the second light filling chip 12 is flowed through, guarantees that the current strength size for flowing through the second light filling chip 12 is the electric current of setting
Value, flows through the current strength I=0.2V/R4 of the second light filling chip 12.
It should be noted that when the first light filling chip 11 and the second light filling chip 12 are using parallel way shown in Fig. 3
When connection, the first encapsulated circuit pin 13 of packaging part connects the first light filling output end IRLEDO of the first light filling control circuit 8
+,IRLEDO-.Also, the second encapsulated circuit pin 14 of packaging part connects the second light filling output of the second light filling control circuit 9
Hold LED+, LED-.
When first light filling chip 11 is connected with the second light filling chip 12 using the series system in Fig. 4, the third of packaging part
Encapsulated circuit pin 15 connects first light filling output end IRLEDO+, IRLEDO- of the first light filling control circuit 8.
In a specific embodiment, the first light filling chip 11 selection wave band be 700nm~760nm light, 700~
What the first light filling chip 11 of 760nm wave band issued is infrared light, and color is red.Second light filling chip 12 use colour temperature for
The warm white of 3000K, color are yellow, and therefore, the first light filling chip 11 of 3000K warm white and 700~760nm wave band is mixed
The color of light is that warm white colour cast is yellow after conjunction, and on the one hand which can solve the dazzling problem of glare caused by simple white light, another
Aspect can solve the red exposure problem of simple 700-760nm wave band after the second light filling, prevent from being mistaken as crossing red light.Except this
Except, this kind the second light filling mode is conducive to improve the contrast under face and the infrared light filling effect of license plate.Preferably, it first mends
The current strength that light control circuit 8 is input to the first light filling chip 11 is 800mA, and the second light filling control circuit 9 is input to
The current strength of 3000K warm white is 5~10mA.
Finally it is noted that above embodiments are only to illustrate the technical solution of the utility model, rather than it is limited
System.Those skilled in the art should understand that: it is possible to modify the technical solutions described in the foregoing embodiments, or
Person's equivalent replacement of some of the technical features；These are modified or replaceed, and do not make the essence of corresponding technical solution de-
Spirit and scope from various embodiments of the utility model technical solution.
Claims (12)
1. a kind of supplementary lighting sources characterized by comprising the first light filling chip (11) and the second light filling chip (12), described
The sending light of one light filling chip (11) is in 650nm~850nm wave band, and the second light filling chip (12) is for colour temperature
The white light of 2700K~6500K；The first light filling chip (11) and the second light filling chip (12) are opened simultaneously, and described second mends
The sending light of optical chip (12) is mixed with the sending light of the first light filling chip (11), forms exposure compensating light；It is input to institute
State the ratio of the current strength and the current strength size for being input to the second light filling chip (12) of the first light filling chip (11)
Scope control be 1:10~1:200.
2. supplementary lighting sources as described in claim 1, which is characterized in that the sending light of the first light filling chip (11) is in
In 700nm~760nm wave band, the second light filling chip (12) is the warm white that colour temperature is 3000K.
3. supplementary lighting sources as claimed in claim 2, which is characterized in that the electric current for being input to the first light filling chip (11) is strong
Degree is 800mA, and the current strength for being input to the warm white is 5~10mA.
4. supplementary lighting sources as described in claim 1, which is characterized in that the power bracket of the first light filling chip (11) is
The power bracket of 0.5W~3W, the second light filling chip (12) are 0.05W~1W.
5. supplementary lighting sources as described in claim 1, which is characterized in that the first light filling chip (11) and the second light filling chip
(12) irradiation zone is in cone-shaped, and the light for the overlapping range that two irradiation zones are formed is the exposure compensating light, and institute
It states overlapping range and closes on the first light filling chip (11) and the setting of the second light filling chip (12).
6. the supplementary lighting sources as described in any one of claims 1 to 5, which is characterized in that the first light filling chip (11) and
Second light filling chip (12) is encapsulated in a thermally conductive board group, and the thermally conductive board group is installed on light filling installation base plate, wherein institute
Stating thermally conductive board group includes thermally conductive articulamentum (6) and heat-radiating substrate (7), and two light filling chips pass through thermally conductive articulamentum (6)
Fixed on heat-radiating substrate (7), alternatively, multiple first light filling chips (11) and multiple second light filling chips (12) alternately every
It opens and is arranged on light filling installation base plate.
7. supplementary lighting sources as claimed in claim 6, which is characterized in that the first light filling chip (11) and the second light filling chip
(12) connect in parallel or serial fashion, wherein in the case of being connected in parallel: the first light filling chip (11) and second is mended
Optical chip (12) is connect each by the corresponding encapsulated circuit pin current control circuit external with the supplementary lighting sources (1)；
In the case of series connection: the both ends of the series circuit of the first light filling chip (11) and the second light filling chip (12) composition are logical
The encapsulated circuit pin current control circuit external with the supplementary lighting sources (1) is crossed to connect.
8. a kind of light supplementing device of camera, which is characterized in that including supplementary lighting sources (1), lens (2), mounting plate component (3) and electricity
Flow control circuit, in which: the supplementary lighting sources (1) are arranged in the one or both sides of the camera lens (4) of video camera, the supplementary lighting sources
(1) go out in light optical path is set the lens (2), and the current control circuit control is conveyed to the electric current of the supplementary lighting sources (1)
Size, the supplementary lighting sources (1) are mounted on video camera by the mounting plate component (3), wherein the supplementary lighting sources (1)
For supplementary lighting sources described in any one of claims 1 to 7 (1).
9. light supplementing device of camera as claimed in claim 8, which is characterized in that the current control circuit includes the first light filling
Control circuit (8) and the second light filling control circuit (9), the output end connection described first of the first light filling control circuit (8)
The output end of the encapsulated circuit pin of light filling chip (11), the second light filling control circuit (9) connects the second light filling core
The encapsulated circuit pin of piece (12).
10. light supplementing device of camera as claimed in claim 9, which is characterized in that the first light filling control circuit (8) has
First light filling input terminal and the first light filling output end, the first light filling output end connect the envelope of the first light filling chip (11)
Fill circuit pin；
The first light filling control circuit (8) includes the first constant-current driven chip (UG1), first constant-current driven chip
(UG1) have and the switch output pin of the first light filling input terminal is connected by diode (D16), is connected by resistance (R247)
It connects the LED current detection pin of the first light filling input terminal, the PWM pin of peripheral control unit is connected by resistance (R246)
The chip input voltage pin of chip operation enable pin, connection the first light filling input terminal；
Current limit circuit (81) are set between the LED current detection pin and the first light filling input terminal, the LED current
Detect pin and current-limiting circuit (81) indirectly；The first light filling input terminal is grounded by the first filter circuit (82)；Institute
It states switch output pin and the first light filling output end is connected by the first storage capacitor (L2)；The anode of the first light filling output end
Current stabilization circuit (83) are set between cathode；
The current-limiting circuit (81) includes the first resistor (R249) and second resistance (R248) being connected in parallel；First filtering
Circuit (82) includes the first capacitor (C273) being connected in parallel and the second capacitor (C270)；The current stabilization circuit (83) includes parallel connection
The third capacitor (C274) and the 4th capacitor (C269) of connection.
11. light supplementing device of camera as claimed in claim 10, which is characterized in that the second light filling control circuit (9) tool
There are the second light filling input terminal and the second light filling output end, the second light filling output end connects the second light filling chip (12)
Encapsulated circuit pin；
The second light filling chip (12) includes the second constant-current driven chip (UW2), the second constant-current driven chip (UW2) tool
Have the switch output pin of output head anode is connected by the second storage capacitor (L3), be connected to by boost capacitor (C6) it is described
The power input pin of boosting pin, the second light filling input terminal of connection between switch output pin and the second storage capacitor L3,
The constant-current driven chip mould of the PWM pin of the output current feedback pin, connection peripheral control unit that are grounded by RC filter circuit
Formula base pin selection；
Set between the second light filling input terminal and ground the second filter circuit (91), the second light filling output end anode and it is negative
Flying capcitor (C10) between pole, the second light filling negative pole of output end are grounded by resistance (R4)；
Second filter circuit (91) includes the third capacitor (C7) and the 4th capacitor (C8) being connected in parallel.
12. a kind of video camera, which is characterized in that including the light supplementing device of camera as described in any one of claim 8 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821393044.5U CN208691388U (en) | 2018-08-28 | 2018-08-28 | A kind of supplementary lighting sources and light supplementing device of camera and video camera with it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821393044.5U CN208691388U (en) | 2018-08-28 | 2018-08-28 | A kind of supplementary lighting sources and light supplementing device of camera and video camera with it |
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| CN208691388U true CN208691388U (en) | 2019-04-02 |
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ID=65887214
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| CN201821393044.5U Active CN208691388U (en) | 2018-08-28 | 2018-08-28 | A kind of supplementary lighting sources and light supplementing device of camera and video camera with it |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110445990A (en) * | 2019-08-13 | 2019-11-12 | 浙江大华技术股份有限公司 | A kind of light compensating apparatus and camera system |
| WO2020043141A1 (en) * | 2018-08-28 | 2020-03-05 | 杭州海康威视数字技术股份有限公司 | Video camera |
| CN111935368A (en) * | 2019-05-13 | 2020-11-13 | 杭州海康威视数字技术股份有限公司 | Camera with built-in infrared lamp and white light lamp |
| CN112130052A (en) * | 2019-06-25 | 2020-12-25 | 华为技术有限公司 | Terminal and method for detecting badness thereof |
| CN113453408A (en) * | 2020-03-26 | 2021-09-28 | 浙江宇视科技有限公司 | Light supplement drive control circuit and method and network camera |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020043141A1 (en) * | 2018-08-28 | 2020-03-05 | 杭州海康威视数字技术股份有限公司 | Video camera |
| CN111935368A (en) * | 2019-05-13 | 2020-11-13 | 杭州海康威视数字技术股份有限公司 | Camera with built-in infrared lamp and white light lamp |
| CN111935368B (en) * | 2019-05-13 | 2022-05-03 | 杭州海康威视数字技术股份有限公司 | Camera with built-in infrared lamp and white light lamp |
| CN112130052A (en) * | 2019-06-25 | 2020-12-25 | 华为技术有限公司 | Terminal and method for detecting badness thereof |
| CN112130052B (en) * | 2019-06-25 | 2022-07-12 | 华为技术有限公司 | Terminal and method for detecting badness thereof |
| CN110445990A (en) * | 2019-08-13 | 2019-11-12 | 浙江大华技术股份有限公司 | A kind of light compensating apparatus and camera system |
| CN113453408A (en) * | 2020-03-26 | 2021-09-28 | 浙江宇视科技有限公司 | Light supplement drive control circuit and method and network camera |
| CN114126136A (en) * | 2020-08-28 | 2022-03-01 | 浙江宇视科技有限公司 | Intelligent light supplementing method, device, medium and system |
| CN113909637A (en) * | 2021-09-30 | 2022-01-11 | 北京博清科技有限公司 | Control method and control device for welding equipment and welding system |
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