CN206525004U - A kind of circuit of LED of adjustable color temperature - Google Patents
A kind of circuit of LED of adjustable color temperature Download PDFInfo
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- CN206525004U CN206525004U CN201720185879.0U CN201720185879U CN206525004U CN 206525004 U CN206525004 U CN 206525004U CN 201720185879 U CN201720185879 U CN 201720185879U CN 206525004 U CN206525004 U CN 206525004U
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Abstract
A kind of circuit of LED of adjustable color temperature, it has adjustable color temperature ability.This circuit of LED includes the first LED string, resistance, and the second LED string.First LED string has the first colour temperature.Resistant series are in the first LED string.Second LED string has the second colour temperature.First LED connection in series-parallel is in the second LED string.Second colour temperature is higher than first colour temperature.Wherein when inputting the sum total electric current of the first LED string and the second LED string from low to high, the synthetic color temperature of the first LED string and the second LED string increases.The utility model can provide a kind of circuit of LED for having and adjusting colour temperature function, can also provide a kind of can adjust the circuit of LED of colour temperature using arranged in series combination in parallel, can also provide it is a kind of can simulate the circuit of LED of natural light colour temperature, with further meet people life in the photochromic change of illumination apparatus demand.
Description
Technical field
The utility model on a kind of circuit of LED, and especially in regard to a kind of adjustable color temperature light emitting diode electricity
Road.
Background technology
Colour temperature is a physical quantity for being used in light optics define light source colour.Colour temperature is defined as follows：It is black one
Body is heated to a temperature, and when the color of its light launched is identical with the color for the light that some light source is launched, this black matrix adds
The temperature of heat is referred to as the colour temperature of the light source, abbreviation colour temperature.Its unit is represented with " K " (kelvin degree unit).With one
As human eye watch, the light source of low colour temperature is commonly referred to as warm tones, and general presentation meaning is red, yellow or orange in the majority.High color
The light source of temperature is commonly referred to as cool tone, and general presentation is in the majority with blueness or purple.The colour temperature of some Ordinary Light Sources Haves is：Standard is lit up
Light is 1930K (kelvin degree unit)；Tengsten lamp is 2760-2900K；Fluorescent lamp is 6400K；Flash lamp is 3800K；Noon
Sunlight is 5000K；X-flash is 6000K；Blue sky is 10000K.
Modern lighting apparatus has evolved to light emitting diode (LED).Many lighting apparatus are to carry out group with LED string
Into.The white light LEDs produced now are largely by covering one layer on blue-ray LED (near-UV, wavelength 450nm to 470nm)
What faint yellow fluorescent coating was made.Then LED string can be radiated at the glimmering of LED string periphery by LED luminous in itself
Light powder, allows beholder to look like white light.If however, the specification of product design needs a certain stable colour temperature, Huo Zhexu
A certain special colour temperature curve is wanted, the designer of LED string can be an important challenge.Whole LED industrial quarters needs one
The LED with adjustable color temperature function is planted, allows designer easily and accurately to design and manufacture the LED of the adjustable color temperature of high-quality
Lamp string.In addition, the light of nature, often as brightness changes colour temperature simultaneously.Nature can be simulated again by how reducing cost
Light is always a technological challenge.
Utility model content
One of purpose of the present utility model is to provide a kind of circuit of LED for having and adjusting colour temperature function.This
Another purpose of utility model is to provide a kind of can adjust luminous the two of colour temperature using arranged in series combination in parallel
Pole pipe circuit.Another purpose of the present utility model, which is to provide, a kind of can simulate the circuit of LED of natural light colour temperature.
According to one embodiment of the present utility model, a kind of circuit of LED is proposed, it has adjustable color temperature ability.
This circuit of LED includes the first LED string, resistance, and the second LED string.First LED string has the first colour temperature.
Resistant series are in the first lamp string.Second LED string has the second colour temperature.First LED connection in series-parallel is in second LED
String.Second colour temperature is higher than first colour temperature.Wherein when inputting the total of the first LED string and the second LED string
When closing electric current from low to high, the synthetic color temperature of the first LED string and the second LED string increases.
According to another embodiment of the present utility model, a kind of circuit of LED is proposed, it has adjustable color temperature ability.
This circuit of LED includes the first LED string, the first adjustor module, first switch combination, the second LED string, second
Adjustor module, and second switch combination.First LED string has the first colour temperature.Second LED string has the second colour temperature.
Second colour temperature is higher than first colour temperature.First adjustor module supplies first the first electric current of LED string.First switch combination connects
It is connected between the first LED string and the first adjustor module.Second adjustor module supplies second the second electric current of LED string.
Second switch combination is connected between the second LED string and the second adjustor module.Wherein first switch combination can be independent
Opened and closed in second switch combination.
According to another embodiment of the present utility model, a kind of circuit of LED is proposed, it has adjustable color temperature ability.
This circuit of LED includes first group of LED string, second group of LED string, and switch combination.First group of LED string bag
Containing the first LED string and the second LED string.First LED string and the second LED string all have the first colour temperature.Second group
LED string includes the 3rd LED string and the 4th LED string.3rd LED string and the 4th LED string all have the second color
Temperature.The serial or parallel connection of first LED string and the second LED string described in switch combination system.Switch combination controls the 3rd LED string
With the serial or parallel connection of the 4th LED string.Second colour temperature is higher than first colour temperature.
According to another embodiment of the present utility model, a kind of circuit of LED is proposed, it has adjustable color temperature ability.
This circuit of LED includes first group of LED string, second group of LED string, and switch combination.First group of LED string bag
Containing the first LED string and the second LED string.First LED string has the first colour temperature, and the second LED string has the second colour temperature.
Second group of LED string includes the 3rd LED string and the 4th LED string.3rd LED string has the 3rd colour temperature, the 4th LED
String all has the 4th colour temperature.Switch combination controls the serial or parallel connection of the first LED string and the second LED string.Open
Close the serial or parallel connection of combination the first LED string of control and the second LED string.Wherein the first colour temperature is different from the second colour temperature.The
Three colour temperatures are different from the 4th colour temperature.
Brief description of the drawings
Fig. 1 illustrates an embodiment of light emitting diode (LED) circuit of adjustable color temperature.
Fig. 2 is graph of a relation of the electric current to colour temperature of LED string.
Fig. 3 is graph of a relation of the electric current to colour temperature of another LED string.
Fig. 4 illustrates another embodiment of light emitting diode (LED) circuit of adjustable color temperature.
Fig. 5 be in Fig. 4 using the LED string of different-colour after, the second LED string both end voltage with must after overall mix
To the graph of a relation of colour temperature.
Fig. 6 illustrates another embodiment of light emitting diode (LED) circuit of adjustable color temperature.
Fig. 7 illustrates another embodiment of light emitting diode (LED) circuit of adjustable color temperature.
Fig. 8 illustrates another embodiment of light emitting diode (LED) circuit of adjustable color temperature.
Fig. 9 represents to control the embodiment of LED string.
Figure 10 A represent the embodiment and current-voltage characteristic curve of adjuster.
Figure 10 B represent the further embodiment and current-voltage characteristic curve of adjuster.
Figure 10 C represent the further embodiment and current-voltage characteristic curve of adjuster.
Figure 11 A represent the further embodiment and current-voltage characteristic curve of adjuster.
Figure 11 B represent the further embodiment and current-voltage characteristic curve of adjuster.
Figure 11 C represent the further embodiment and current-voltage characteristic curve of adjuster.
Embodiment
Fig. 1 illustrates an embodiment of light emitting diode (LED) circuit of adjustable color temperature.Reference picture 1, LED circuit 100 includes
First LED string 101, the second LED string 102 and drive circuit 103.Drive circuit 103 provides the first LED string 101 the
One electric current 106, drive circuit 103 provides second the second electric current of LED string 107.First lamp string 101 has the first colour temperature, second
Lamp string 102 has the second colour temperature.Fig. 2 is graph of a relation of the electric current to colour temperature of LED string.Fig. 3 is the electric current pair of another LED string
The graph of a relation of colour temperature.Reference picture 2, the first LED string 101 has relation curve 200 of the electric current to colour temperature.For same LED
String 101, although colour temperature can be with the curent change passed through, its amplitude of variation is not too large, in one embodiment, LED string 101
Colour temperature is in above and below 2200K.Second LED string 102 has relation curve 300 of the electric current to colour temperature.In one embodiment, LED
102 colour temperatures go here and there in above and below 3000K.Electric current is to the relation curve 200 of colour temperature with a curvilinear characteristic gently towards fovea superior, electric current pair
The relation curve 300 of colour temperature has one gently towards recessed curvilinear characteristic.
Fig. 4 is one embodiment of the LED circuit of adjustable color temperature.Reference picture 4, in certain embodiments, the first LED string
101 represent the 2200K of relatively low colour temperature, and the second LED string 102 represents the 3000K of higher color temperature, when the two ends of the second LED string 102
When voltage is smaller, the junction voltage of the first LED string 101 is relatively low, can first turn on so that the light that whole lamp is sent is by the first LED string 101
Leading to determine, now the second LED string 102 is in OFF state.When the both end voltage of the second LED string 102 is increased, second is reached
Second LED string 102 is turned on after the turn-on condition of LED string 102, the 3000K light that now the second LED string 102 is sent
It can be mixed with 2200K light, the overall light color temperature sent is increased.Continue the electricity at increasing the second LED string 102 two ends
Pressure, the electric current of the branch road of the second LED string 102 rises can be very fast, and the branch road of the first LED string 101 is due to there is series resistor 501, electricity
Stream rising is slower, so so that the colour temperature of the overall light sent may proceed to improve, but the maximum color temperature value of overall output will not reach
To 3000K, because the light that the first LED string 101 is sent exists always, and occupy certain proportion.Fig. 5 is using difference in Fig. 4
After the lamp bar of colour temperature, the both end voltage of the second LED string 102 and the graph of a relation that colour temperature is obtained after overall mix.Reference picture 4 and
Fig. 5, V represent the terminal voltage of the second LED string 102, and different V can make the light and the second LED that the first LED string 101 sends
Different colour temperatures are produced after the light mixing that string 102 is sent.For example, less voltage V1 can produce a relatively low colour temperature K1, compared with
High voltage V2 can produce higher colour temperature K2.
Fig. 4 is refer to, in certain embodiments, LED circuit 100 includes bidirectional triode thyristor (TRIAC) 502, light modulation driving
Circuit 503, the first LED string 101, the second LED string 102, and resistance 501.In one embodiment, resistance 501 is adjustable
Resistance.The input of bidirectional triode thyristor 502 is alternating current (AC), and output end is then the alternating current after cut position.Foundation is cut
The size of phase, can control back segment integral LED lamp string to combine 500 brightness.In this embodiment, LED string combination 500 is wrapped
Containing the first LED string 101, the second LED string 102, and resistance 501.When the both end voltage of the second LED string 102 is gradually increasing
When, flowing into the overall current of LED string combination 500 can also rise therewith, and the brightness of lamp string combination 500 is consequently increased.But
The first LED of increasing degree string 101 of brightness and the second LED string 102 are simultaneously differed, so in the state of mixing, can be with
So that integral LED lamp string combines the 500 relatively low colour temperatures from script, it is gradually increasing as relatively higher colour temperature.The sun of nature
Light in the morning when belong to than relatively low colour temperature, that is, belong to yellow hue, but with the rising of the sun, colour temperature gradually increases
Height, as the tone close to white.Circuit design so, can simulate available light, from than relatively low colour temperature, be gradually increasing
Into relatively higher colour temperature.
Fig. 6 illustrates another embodiment of light emitting diode (LED) circuit of adjustable color temperature.Reference picture 6, light emitting diode
(LED) circuit 600 includes one first group of LED string 601, second group of LED string 602, switch combination 607 and adjustment module
(regulator module)605.First group of LED string 601 includes multiple LED strings, such as LED string 6011, LED string
6012 and LED string 601P.Second group of LED string 602 also includes multiple LED, such as LED string 6021, LED string
6022, LED string 6023 and LED string 6024.Switch combination 607 includes multiple switch, for example, switch 6071, switch 6072
And switch 607N.Adjustment module 605 include multiple adjusters (regulator), such as adjuster 6051,6052 and
605N.LED string 6011, LED string 6012 and LED string 601P are to belong to parallel-connection structure.LED string 6021 and LED
Lamp string 6022 belongs to cascaded structure, and LED string 6023 and LED string 6024 belong to cascaded structure.
In certain embodiments, the LED string in first group of LED string 601 has identical colour temperature, second group of LED string 602
Interior LED string has identical colour temperature, but the colour temperature of first group of LED string 601 and second group of LED string 602 is different.
The LED string quantity in LED string quantity and second group of LED string 602 in first group of LED string 601 can be used as adjustment
The coefficient of overall colour temperature.For example, setting M LED string in first group of LED string 601, the N number of LED string of setting is in second group
In LED string 602, adjustment M and N ratio can just adjust last colour temperature.Due to the LED in first group of LED string 601
String is in parallel, and the LED string in second group of LED string 602 is series connection, so first group of LED string 601 and second group of LED
The conducting voltage of string 602 is different.First group of LED string 601 can be turned on first, until voltage is enough, second group of LED string
602 can just turn on.So, with the difference of voltage, conduction status is different, and the total current of input is also different, the colour temperature group of generation
Close also different.The need for designer can be according to difference, suitable voltage is mixed bent to colour temperature to colour temperature curve or electric current
Line.In certain embodiments, the LED string in first group of LED string 601 has in different-colour, second group of LED string 602
LED string has the colour temperature differed.Ratio according to different M and N can also adjust last colour temperature.
Fig. 7 illustrates another embodiment of light emitting diode (LED) circuit of adjustable color temperature.Reference picture 7, light emitting diode
(LED) circuit 700 is most of identical with light emitting diode (LED) circuit 600, and difference is light emitting diode (LED) electricity
Road 700 includes separated switch combination 607 and switch combination 608.Different groups are coupled with using different switch combinations
LED string can reach the effect that is turned on and off of control LED string respectively.For example, designer can be fixed by switch
Combination 607 is turned on and off, or adjustment being turned on and off by switch combination 608, adjusting colour temperature.In a word, separately adjust
The LED string of whole different groups, which more can flexibly be done, to be changed, to reach the effect of adjustment colour temperature.
Reference picture 7, in certain embodiments, switch combination 607 and switch combination 608 are to be used for pulse width modulation.
That is it is to adjust first group of LED string 601 for realizing in the way of dutycycle that 607 pairs of switch combination, which is opened and closed,
Brightness.It is to adjust second group of LED string 602 for realizing in the way of dutycycle that 608 pairs of switch combination, which is opened and closed,
Brightness.In certain embodiments, the dutycycle of switch combination 607 and the dutycycle of switch combination 608 are different, that is,
Say, first group of LED string 601 can be adjusted different with the brightness of second group of LED string 602.Due to first group of LED string 601
Colour temperature it is different with the colour temperature of second group of LED string 602, when the brightness of first group of LED string 601 and second group of LED string 602
When separately can freely adjust, because the ratio of colour temperature is different, designer can just adjust any dutycycle to be mixed into most
Colour temperature afterwards.In this embodiment, the pulse width modulation of switch combination 607 and switch combination 608 is can to separate only
Vertical control.In certain embodiments, the LED string in first group of LED string 601 has different-colour, second group of LED string
LED string in 602 has the colour temperature differed.Respective different pulse according to switch combination 607 and switch combination 608 is wide
Degree modulation, can also adjust last colour temperature.
Fig. 8 illustrates another embodiment of light emitting diode (LED) circuit of adjustable color temperature.Reference picture 8, in some embodiments
In, light emitting diode (LED) circuit 800 includes adjustment module 805, control unit 806 and LED string 801, LED string
802, LED string 803 and LED string 804.Control unit 806 supplies driving current to LED string 802, LED string 803 with
And LED string 804.In certain embodiments, control unit 803 includes switch combination 807.Switch combination 807 can control LED
The connected mode of lamp string 801, LED string 802, LED string 803 and LED string 804, for example in parallel or in series.Wherein
LED string 801, LED string 802, LED string 803 and LED string 804 can have different colour temperatures.
In certain embodiments, switch combination 807 is opened including first switch S1, second switch S2, the 3rd switch S3, the 4th
Close S4, the 5th switch S5, the 6th switch S6, the 7th switch S7, the 8th switch S8 and the 9th switch S9.When first switch S1,
Second switch S2, the 3rd switch S3, the 7th switch S7, the 8th switch S8 and the 9th switch S9 close connection, and remaining is opened
When shut-off is opened, LED string 801, LED string 802, LED string 803 and LED string 804 are all in parallel.Work as first switch
S1, the 3rd switch S3, the 5th switch S5, the 7th switch S7 and the 9th switch S9 closure connections, and second switch S2, the 4th
When switching S4, the 6th switch S6 and the 8th switch S8 disconnections, LED string 801 and LED string 802 are in parallel, LED strings 803
It is in parallel with LED string 804, but LED string 801 and LED string 803 are series connection.In this way, switch combination 807 can be with
Using the structure for being connected and disconnected from the series connection in parallel to control all LED strings of switch, designer can select suitable group
Close and arrange in pairs or groups, to reach the relation curve of desired colour temperature or electric current to colour temperature.
Fig. 9 represents to control the embodiment of LED string.Reference picture 9, in certain embodiments, LED string 901 and LED string
902 be in parallel.LED string 903 and LED string 904 are series connection.Transistor 905 supplies current to LED string 901, transistor
906 supply current to LED string 902, and transistor 907 supplies current to LED string 903 and LED string 904.Grid 908, grid
Pole 909 and grid 910 can distinguish the size of current of controlling transistor 905, transistor 906 and transistor 907.Grid 908, grid
Pole 909 and grid 910 can distinguish controlling transistor 905, the opening and closing of transistor 906 and transistor 907.Such one
Come, not only the electric current of individual other LED string can be adjusted, and individual other LED string can also be closed selectively.Designer can profit
The relation curve of colour temperature and electric current required for controlling to colour temperature is adjusted with these transistors.Control gate 908, grid 909
Pulse width modulation (PWM) can also be realized with grid 910., can be according to control signal when carrying out pulse width modulation
The fast opening and closing of control gate 908, grid 909 and grid 910, and then control 905, transistor 906 and transistor 907 is controlled,
Reach the result of control LED cross luma degree.In certain embodiments, colour temperature can with pulse width modulation dutycycle without
Together.That is, with the increase and decrease of brightness, colour temperature can also change.
Figure 10 A represent the embodiment and current-voltage characteristic curve of adjuster.Figure 10 B represent the other reality of adjuster
Apply example and current-voltage characteristic curve.Figure 10 C represent the further embodiment and current-voltage characteristic curve of adjuster.Figure
11A represents the further embodiment and current-voltage characteristic curve of adjuster.Figure 11 B represent the further embodiment of adjuster
And current-voltage characteristic curve.Figure 11 C represent the further embodiment and current-voltage characteristic curve of adjuster.Reference picture
10A, Figure 10 B, Figure 10 C, Figure 11 A, Figure 11 B and Figure 11 C, preferable adjuster is a constant-current supply, but is intended to energy
The current-voltage characteristic curve of enough appropriate adjustment output controllers, can add resistance outside constant-current supply.Resistance can be with
Selection is to do serial or parallel connection with preferable constant-current supply.The connected mode of different resistance connected mode and different transistors
Different current-voltage characteristic curves can be brought up.In certain embodiments, resistance can be adjustable resistance, allow designer can be with
Colour temperature and electric current required for more flexible adjustment is to colour temperature curve.
By the above embodiments, said one or multiple technical problems can be solved according to different technical characterstics.
Although the utility model is illustrated with the above embodiments as far as possible, the personnel in this technical field are familiar with
Appropriate replacement or modification should can be carried out according to above-mentioned explanation, these are replaced or changed or combination includes saving a member
Part or increase element, should all belong to scope of the present utility model.
Claims (20)
1. a kind of circuit of LED, it has adjustable color temperature ability, it is characterised in that include：
First LED string, with the first colour temperature；
Resistance, is series at the first LED string；And
Second LED string, with the second colour temperature, the first LED connection in series-parallel is in the second LED string, second color
Temperature is higher than first colour temperature；
Wherein when inputting the driving current of the first LED string and the second LED string from low to high, described first
The synthetic color temperature of LED string and the second LED string increases.
2. circuit of LED as claimed in claim 1, it is characterised in that also comprising dimming driving circuit, the light modulation
Drive circuit supply driving current gives the first LED string and the second LED string.
3. circuit of LED as claimed in claim 2, it is characterised in that also comprising bidirectional triode thyristor, it is described it is two-way can
Control silicon and cut is carried out to alternating current input, and the dimming driving circuit is given by the signal output after cut.
4. circuit of LED as claimed in claim 1, it is characterised in that the conducting voltage of the first LED string is small
In the conducting voltage of the second LED string.
5. circuit of LED as claimed in claim 1, it is characterised in that the first LED string and described second
The synthetic color temperature of LED string is between first colour temperature and second colour temperature.
6. a kind of circuit of LED, it has adjustable color temperature ability, it is characterised in that include：
First LED string, with the first colour temperature；
Second LED string, with the second colour temperature, second colour temperature is higher than first colour temperature；
First adjustor module, supplies the first electric current of the first LED string；
First switch is combined, and is connected between the first LED string and first adjustor module；
Second adjustor module, supplies the second electric current of the second LED string；And
Second switch is combined, and is connected between the second LED string and second adjustor module；
Wherein described first switch combination can be opened and closed independently of second switch combination.
7. circuit of LED as claimed in claim 6, it is characterised in that the first switch combination provides the first pulse
Width modulated, the second switch combination provides the second pulse width modulation, first pulse width modulation and described second
Pulse width modulation is not exclusively synchronous.
8. circuit of LED as claimed in claim 6, it is characterised in that also comprising resistance, the resistant series are in institute
State the first LED string.
9. circuit of LED as claimed in claim 6, it is characterised in that the first LED string and described second
The synthetic color temperature of LED string is between first colour temperature and second colour temperature.
10. circuit of LED as claimed in claim 6, it is characterised in that the conducting voltage of the first LED string is small
In the conducting voltage of the second LED string.
11. circuit of LED as claimed in claim 6, it is characterised in that the first switch combination includes transistor,
The second switch combination includes transistor.
12. a kind of circuit of LED, it has adjustable color temperature ability, it is characterised in that include：
First group of LED string, includes the first LED string and the second LED string, the first LED string and described second
LED string all has the first colour temperature；
Second group of LED string, includes the 3rd LED string and the 4th LED string, the 3rd LED string and the described 4th
LED string all has the second colour temperature；And
Switch combination, the serial or parallel connection for controlling the first LED string and the second LED string, the switch combination
Control the serial or parallel connection of the 3rd LED string and the 4th LED string；
Wherein described second colour temperature is higher than first colour temperature.
13. circuit of LED as claimed in claim 12, it is characterised in that also comprising an adjustment module, the regulation
Module supplies the first electric current to first group of LED string, and the adjustment module supplies the second electric current to second group of LED string.
14. circuit of LED as claimed in claim 12, it is characterised in that the first LED string and described
Two LED strings are parallel connection, and the 3rd LED string and the 4th LED string are series connection.
15. circuit of LED as claimed in claim 12, it is characterised in that the first LED string and described
Two LED strings are series connection, and the 3rd LED string and the 4th LED string are parallel connection.
16. a kind of circuit of LED, it has adjustable color temperature ability, it is characterised in that include：
First group of LED string, comprising the first LED string and the second LED string, the first LED string has the first colour temperature,
The second LED string has the second colour temperature；
Second group of LED string, comprising the 3rd LED string and the 4th LED string, the 3rd LED string has the 3rd colour temperature,
The 4th LED string all has the 4th colour temperature；And
Switch combination, the serial or parallel connection for controlling the first LED string and the second LED string, the switch combination
Control the serial or parallel connection of the first LED string and the second LED string；
Wherein described first colour temperature is different from second colour temperature, and the 3rd colour temperature is different from the 4th colour temperature.
17. circuit of LED as claimed in claim 16, it is characterised in that the first LED string and described
Two LED strings are parallel connection, and the 3rd LED string and the 4th LED string are series connection.
18. circuit of LED as claimed in claim 16, it is characterised in that the first LED string, described second
LED string, the 3rd LED string, and the 4th LED string are all in parallel.
19. circuit of LED as claimed in claim 16, it is characterised in that the first LED string and described
Two LED strings are series connection, and the 3rd LED string and the 4th LED string are series connection.
20. circuit of LED as claimed in claim 16, it is characterised in that also comprising a switch module, for control institute
State the pulse width modulation of first group of LED string and second group of LED string.
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| CN201720185879.0U CN206525004U (en) | 2017-02-28 | 2017-02-28 | A kind of circuit of LED of adjustable color temperature |
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| CN201720185879.0U CN206525004U (en) | 2017-02-28 | 2017-02-28 | A kind of circuit of LED of adjustable color temperature |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106658871A (en) * | 2017-02-28 | 2017-05-10 | 漳州立达信光电子科技有限公司 | Light emitting diode circuit with color temperature adjustment capability |
| US20180249546A1 (en) * | 2017-02-28 | 2018-08-30 | Xiamen Eco Lighting Co. Ltd. | Lighting apparatus and light emitting module |
| CN109979415A (en) * | 2019-04-24 | 2019-07-05 | 深圳市华星光电半导体显示技术有限公司 | RGB turns the method and system of RGBW |
| CN112034665A (en) * | 2020-09-15 | 2020-12-04 | Oppo（重庆）智能科技有限公司 | Flash lamp assembly and electronic equipment |
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2017
- 2017-02-28 CN CN201720185879.0U patent/CN206525004U/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106658871A (en) * | 2017-02-28 | 2017-05-10 | 漳州立达信光电子科技有限公司 | Light emitting diode circuit with color temperature adjustment capability |
| US20180249546A1 (en) * | 2017-02-28 | 2018-08-30 | Xiamen Eco Lighting Co. Ltd. | Lighting apparatus and light emitting module |
| WO2018157539A1 (en) * | 2017-02-28 | 2018-09-07 | 漳洲立达信光电子科技有限公司 | Light emitting diode circuit having color temperature adjustment function |
| US10568177B2 (en) * | 2017-02-28 | 2020-02-18 | Xiamen Eco Lighting Co. Ltd. | Lighting apparatus and light emitting module |
| US20200154543A1 (en) * | 2017-02-28 | 2020-05-14 | Xiamen Eco Lighting Co. Ltd. | Led bulb |
| US10893589B2 (en) * | 2017-02-28 | 2021-01-12 | Xiamen Eco Lighting Co. Ltd. | LED bulb |
| CN109979415A (en) * | 2019-04-24 | 2019-07-05 | 深圳市华星光电半导体显示技术有限公司 | RGB turns the method and system of RGBW |
| CN109979415B (en) * | 2019-04-24 | 2020-12-08 | 深圳市华星光电半导体显示技术有限公司 | Method and system for converting RGB (red, green and blue) into RGBW (red, green and blue) |
| CN112034665A (en) * | 2020-09-15 | 2020-12-04 | Oppo（重庆）智能科技有限公司 | Flash lamp assembly and electronic equipment |
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