CN205584558U - Red optical compensation circuit during white light LED mixes with ruddiness LED - Google Patents
Red optical compensation circuit during white light LED mixes with ruddiness LED Download PDFInfo
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- CN205584558U CN205584558U CN201620285873.6U CN201620285873U CN205584558U CN 205584558 U CN205584558 U CN 205584558U CN 201620285873 U CN201620285873 U CN 201620285873U CN 205584558 U CN205584558 U CN 205584558U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The utility model discloses a red optical compensation circuit during white light LED mixes with ruddiness LED, LED drive output circuit and white light LED circuit, ruddiness LED circuit series connection, the control circuit that just connects in parallel on ruddiness LED circuit, the shunt current of control circuit control ruddiness LED circuit compensates the electric current according to match ruddiness LED's light decay time course in advance. The utility model has the advantages that the LED drive only needs one way constant current output, and white light LED and ruddiness LED establish ties, and the sharing is output all the way, cancel traditional sensor measurements colour temperature method, compensate according to pair of curves warm colour light LED electric current.
Description
Technical field
This utility model relates to a kind of LED illumination circuit engineering field, mixes with red-light LED particularly to a kind of white light LEDs
HONGGUANG in conjunction compensates circuit.
Background technology
High color temperature white light LEDs mixes the warm color temperature white light that can obtain more specular removal with HONGGUANG/succinum light LED, but white light LEDs
For INGAN chip, red-light LED is ALINGAP chip, and red-light LED decay is faster than white light LEDs, and the time is the most long, high color temperature white light
The color temperature shift that LED warms up color temperature white light with HONGGUANG/succinum light LED mixing gained is the biggest.
The conventional solution used for above technical problem is that LED drive circuit is individually for red-light LED offer one
Road exports, and by sensor measurement colour temperature, elapses that red-light LED carries out current compensation, i.e. time is the most long in time, red-light LED
Electric current is the biggest.Shortcoming is that LED drive circuit needs to be individually for red-light LED and provides a road output, causes driving circuit structure multiple
Miscellaneous；Also needing to sensor measurement colour temperature, the structure causing control circuit and whole lamp is complicated simultaneously.This is that the application needs to change emphatically
Kind place.
Utility model content
Technical problem to be solved in the utility model is to provide for a kind of single LED and drives the white light LEDs of output with red
HONGGUANG in light LED mixing compensates circuit.
In order to solve above technical problem, it is red that this utility model provides during a kind of white light LEDs mixes with red-light LED
Light compensates circuit, and LED drives output circuit and white light LED circuit, red-light LED circuit connected in series, and in parallel on red-light LED circuit
One control circuit, described control circuit controls the shunt current of red-light LED circuit, by matching red-light LED in advance light decay/time
Electric current is compensated by half interval contour.
Described control circuit is the on-off circuit that PWM controls.
Superior effect of the present utility model is:
1) LED drives and only needs single channel constant current output, and white light LEDs is connected with red-light LED, shares a road output, red-light LED
Parallel shunt circuit, the LED of two-way constant current output different from the past drives, and simplifies drive circuit；
2) red-light LED light decay/time graph is passed through in matching in advance, cancels traditional sensor measurement colour temperature method, by song
Warm colour light LED current is compensated by line.
Accompanying drawing explanation
The Figure of description of the part constituting the application is used for providing being further appreciated by of the present utility model, this practicality
Novel schematic description and description is used for explaining this utility model, is not intended that improper restriction of the present utility model.
In the accompanying drawings:
Fig. 1 is schematic block circuit diagram of the present utility model；
Fig. 2 is the circuit diagram of this utility model control circuit；
Fig. 3 is the lumen output of this utility model LED and the curve chart driving current relationship；
Fig. 4 is the light decay curve chart that white light LEDs of the present invention drives when 700mA；
Fig. 5 is the light decay curve chart that red-light LED of the present invention drives when 1A；
Label declaration in figure
1 white light LED circuit；2 red-light LED circuit；
3 control circuits；4 LED drive output circuit.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, but this utility model can be by right
Require that the multitude of different ways limiting and covering is implemented.
Describe embodiment of the present utility model below in conjunction with the accompanying drawings in detail.
Fig. 1 shows schematic block circuit diagram of the present utility model.As it is shown in figure 1, this utility model provides a kind of white light
HONGGUANG during LED mixes with red-light LED compensates circuit, and LED drives output circuit 4 and white light LED circuit 1, red-light LED circuit 2
Series connection, and a control circuit 3 in parallel on red-light LED circuit 2, described control circuit 3 controls the shunting of red-light LED circuit 2
Electric current, is compensated electric current by the light decay/time graph of matching red-light LED in advance.
As in figure 2 it is shown, the on-off circuit that described control circuit 3 controls for PWM.Described switching tube is audion, or is MOS
Pipe, realizes controlling the turn-off time by controlling dutycycle.
As in figure 2 it is shown, when pwm signal is high level when, switching tube turns on, and red-light LED is switched on and off tube short circuit, electricity
Flowing and flow through through switching tube loop after white light LEDs flows out, not through red-light LED, at this time red-light LED does not works；Work as pwm signal
For time low level, switching tube ends, and electric current flows through through red-light LED after white light LEDs flows out, and at this time red-light LED is bright.
When PWM frequency is the highest when, the red-light LED that human eye is experienced be no longer bright with do not work, but the HONGGUANG of different bright-dark degree,
Thus can change the red light portion of synthesis light.PWM duty cycle is the least, and HONGGUANG is the strongest.
Originally, PWM duty cycle is relatively big, and in a switch periods, switching tube ON time is long, and red LED bright time is short,
Now red-light LED light efficiency is preferable, and brightness can meet the demand of complex light, and As time goes on, red-light LED is decayed increasingly
Severity, the most progressively turns PWM duty cycle down, and in a switch periods, switching tube ON time shortens, red LED bright time
Between elongated so that the light that red-light LED sends still is able to meet the demand of complex light.
As it is shown on figure 3, for certain series of LED, Fig. 3 characterizes under same temperature conditions, will reach same stream
Driving electric current required for bright output, white light LEDs and red-light LED is different.When white LED driver is at 700mA, HONGGUANG
LED needs to be driven to 1A could obtain identical light output.More than based on, the meeting in life span of white light LEDs and red-light LED
Different light decays is had to show.As shown in Figure 4 and Figure 5, LED life is 50000 hours, then the lumen depreciation of white light LEDs is
90%, i.e. lumen is output as 77lm；And now the lumen depreciation of red-light LED has been 80%, i.e. lumen is output as 68lm.
In order to compensate the light decay part of HONGGUANG, can be from the white light light decay curve with HONGGUANG, in the product design life-span
In the range of, with fixed interval selected point, obtain the lumen output valve of different life time point.From Fig. 1, it is thus achieved that following pass
It is formula:
White light lumen output=109.34* white light drives electric current+8.5102
HONGGUANG lumen output=86.825* HONGGUANG drives electric current+4.2824
Therefore, when obtaining the lumen output difference during both life-spans from light decay curve, two are drawn by above formula
Person drives the difference of electric current, thus is supplied to compensation electric current and the institute thereof of red-light LED needed for setting this utility model control circuit
Take time.
After the control circuit 3 that red-light LED circuit in parallel this utility model patent is used, realized by control circuit 3
When white light LED circuit 1 and red-light LED circuit connected in series, control circuit 3 changes redness according to different duty cycle control signals
The average current of LED circuit, thus obtain different red light output.Draw from Fig. 2, when connecting of White LED and red LED
When electric current is 700mA, the on-off circuit controlled due to pulse signal in parallel above red LED, so red LED is along with pulse
Low and high level change and interrupted break-make, owing to pulse frequency is higher, human eye cannot aware the scintillation of red LED, sense
Be subject to is that the bright-dark degree of HONGGUANG can be different because the dutycycle of pulse signal is different.The duty cycle range of pulse signal is 0%
～100%, so the average current flowing through red LED can change between 0～700mA.At first can be by opening
Pass circuit controls so that red LED average current is 300mA, and As time goes on, red LED attenuation ratio is more severe, at this
Period, incrementally increase red LED average current to 700mA, ensured the color temperature constant of warm colour light by control process.
The foregoing is only preferred embodiments of the present utility model, be not limited to this utility model, for this
For the technical staff in field, this utility model can have various modifications and variations.All in spirit of the present utility model and principle
Within, any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.
Claims (2)
1. the HONGGUANG during a white light LEDs mixes with red-light LED compensates circuit, it is characterised in that: LED drives output circuit with white
Light LED circuit, red-light LED circuit connected in series, and a control circuit in parallel on red-light LED circuit, described control circuit controls
The shunt current of red-light LED circuit, is compensated electric current by the light decay/time graph of matching red-light LED in advance.
HONGGUANG during a kind of white light LEDs the most according to claim 1 mixes with red-light LED compensates circuit, it is characterised in that:
Described control circuit is the on-off circuit that PWM controls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620285873.6U CN205584558U (en) | 2016-04-08 | 2016-04-08 | Red optical compensation circuit during white light LED mixes with ruddiness LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620285873.6U CN205584558U (en) | 2016-04-08 | 2016-04-08 | Red optical compensation circuit during white light LED mixes with ruddiness LED |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205584558U true CN205584558U (en) | 2016-09-14 |
Family
ID=56864608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620285873.6U Active CN205584558U (en) | 2016-04-08 | 2016-04-08 | Red optical compensation circuit during white light LED mixes with ruddiness LED |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205584558U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105657918A (en) * | 2016-04-08 | 2016-06-08 | 上海复展智能科技股份有限公司 | Red light compensating circuit for mixing of white light LEDs and red light LEDs and compensating method |
| CN111427196A (en) * | 2020-04-30 | 2020-07-17 | 京东方科技集团股份有限公司 | Backlight module, driving method thereof and display device |
-
2016
- 2016-04-08 CN CN201620285873.6U patent/CN205584558U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105657918A (en) * | 2016-04-08 | 2016-06-08 | 上海复展智能科技股份有限公司 | Red light compensating circuit for mixing of white light LEDs and red light LEDs and compensating method |
| CN111427196A (en) * | 2020-04-30 | 2020-07-17 | 京东方科技集团股份有限公司 | Backlight module, driving method thereof and display device |
| CN111427196B (en) * | 2020-04-30 | 2022-09-30 | 京东方科技集团股份有限公司 | Backlight module, driving method thereof and display device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220616 Address after: 200433 room 1218, first floor, No. 13, Lane 791, Xiangyin Road, Yangpu District, Shanghai Patentee after: Shanghai Shifang Tongren Network Technology Co.,Ltd. Address before: 200433 room 7004a, No. 335, Guoding Road, Yangpu District, Shanghai Patentee before: SHANGHAI FULZEN INTELLIGENCE TECHNOLOGY CO.,LTD. |
|
| TR01 | Transfer of patent right |