CN202172516U - Brightness and color temperature adjustable LED lamp - Google Patents
Brightness and color temperature adjustable LED lamp Download PDFInfo
- Publication number
- CN202172516U CN202172516U CN 201120279018 CN201120279018U CN202172516U CN 202172516 U CN202172516 U CN 202172516U CN 201120279018 CN201120279018 CN 201120279018 CN 201120279018 U CN201120279018 U CN 201120279018U CN 202172516 U CN202172516 U CN 202172516U
- Authority
- CN
- China
- Prior art keywords
- led
- tube group
- luminous tube
- module
- led luminous
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses a brightness and color temperature adjustable LED lamp, comprising a DC power supply module, an instruction receiving module used for receiving control an instruction, a control driving module connected with the DC power supply module and the instruction receiving module and used for outputting a first PWM signal and a second PWM signal according to the control instruction, first and second LED groups having different color temperatures and connected with the DC power supply module separately, wherein, the LEDs in the first and second LED groups are both white light LEDs, and the color temperatures of the LEDs in the same one LED group are same. The brightness and color temperature adjustable LED lamp also comprises a first dimming module connected with the first LED group and the control driving module and used for controlling the working state and brightness of the first LED group according to the first PWM signal; and a second dimming module connected with second LED group and the control driving module and used for controlling the working state and brightness of the second LED group according to the second PWM signal.
Description
Technical field
The utility model relates to lighting technical field, more specifically, relates to the adjustable LED of a kind of brightness and colour temperature (Light Emitting Diode, light-emitting diode) light fixture.
Background technology
In recent years, along with the popularization of power-saving technology, the energy-saving lighting design has become the research emphasis of field of illuminating lamps.LED has received people's attention because it has advantages such as luminous efficiency height, good energy-conserving effect in the energy-saving lighting design.Using LED to make illuminating lamp and replace traditional illuminating lamp, is the development trend of current lighting technical field.
In order to satisfy the difference hobby of different people on colour temperature, the LED light fixture that can regulate colour temperature also comes out successively.At present; The LED lamp of adjustable color temperature adopts the LED luminous tube group of three kinds of colors of red, green, blue to realize more; What have has also added white LED luminous tube group in order to strengthen brightness, and the luminous tube group of every kind of color all is connected with power supply and LED luminous tube group drive circuit, chroma-luminance controller in turn.Export 1 road signal respectively by 4 LED luminous tube group drive circuits of chroma-luminance controller control, control the luminosity and the operating state of versicolor LED luminous tube group, realize the adjusting of the colour temperature of LED light fixture.
But; In the LED light fixture of above-mentioned prior art, need export 1 road signal respectively, control the LED luminous tube group of 4 kinds of colors by this 4 road signal respectively one to one by 4 LED luminous tube group drive circuits of chroma-luminance controller control; Circuit is very complicated, has increased production cost and failure rate.
The utility model content
In view of this, the main purpose of the utility model is to provide a kind of brightness and the adjustable LED light fixture of colour temperature, can solve the production cost and the high problem of failure rate that exist in the prior art.
For achieving the above object, the technical scheme of the utility model is achieved in that
The utility model provides a kind of brightness and the adjustable LED light fixture of colour temperature, comprising: DC power supplier; The command reception module is used to receive control command; Control and driving module is connected with the command reception module with DC power supplier, is used for the control command that receives according to the command reception module, exports first pwm signal and second pwm signal; LED luminous tube group that colour temperature is different and the 2nd LED luminous tube group; Be connected with DC power supplier respectively; Wherein, the LED in a LED luminous tube group and the 2nd LED luminous tube group is white light LEDs, and the colour temperature of the LED in the same LED luminous tube group is identical; First light-adjusting module is connected with control and driving module with a LED luminous tube group, is used for controlling according to first pwm signal operating state and the brightness of a LED luminous tube group; And second light-adjusting module, be connected with control and driving module with the 2nd LED luminous tube group, be used for controlling the operating state and the brightness of the 2nd LED luminous tube group according to second pwm signal.
Wherein, above-mentioned LED light fixture also comprises: first constant flow module, be connected with first light-adjusting module, and be used for when a LED luminous tube group is worked, the current value of the LED in the LED luminous tube group being maintained the rated working current value of LED; And second constant flow module, be connected with second light-adjusting module, be used for when the 2nd LED luminous tube group is worked, the current value of the LED in the 2nd LED luminous tube group being maintained the rated working current value of LED.
Wherein, first constant flow module is current regulator diode D3, and the anode of current regulator diode D3 is connected with first light-adjusting module, minus earth, and the rated working current value of the LED in the constant current value of current regulator diode D3 and the LED luminous tube group equates; And second constant flow module be current regulator diode D4, the anode of current regulator diode D4 is connected with second light-adjusting module, minus earth, and the rated working current value of the LED in the constant current value of current regulator diode D4 and the 2nd LED luminous tube group equates.
Wherein, Each LED luminous tube group in the one LED luminous tube group and the 2nd LED luminous tube group includes forward at least one LED of series connection; And; The anode of the LED of an end is connected with the positive pole of DC power supplier in each LED luminous tube group, and the negative electrode of the LED of the other end connects with corresponding light-adjusting module.
Wherein, first light-adjusting module is N channel field-effect pipe Q3, and the source electrode of FET Q3 is connected with the anode of current regulator diode D3, and drain electrode is connected with a LED luminous tube group, and grid is connected, is used to receive first pwm signal with control and driving module.
Wherein, second light-adjusting module is N channel field-effect pipe Q4, and the source electrode of FET Q4 is connected with the anode of current regulator diode D4, and drain electrode is connected with the 2nd LED luminous tube group, and grid is connected, is used to receive second pwm signal with control and driving module.
Wherein, include in first light-adjusting module: N channel field-effect pipe Q3, resistance R 1, voltage stabilizing didoe D1 and NPN triode Q1; Wherein: the source electrode of N channel field-effect pipe Q3 is connected with the anode of current regulator diode D3, and drain electrode is connected with a LED luminous tube group, and grid is connected with the negative electrode of voltage stabilizing didoe D1 and the emitter of NPN triode Q1; The plus earth of voltage stabilizing didoe D1; One end of resistance R 1 is connected with the positive pole of DC power supplier, and the other end is connected with the emitter of NPN triode Q1 and the negative electrode of voltage stabilizing didoe D1; The base stage of NPN triode Q1 is connected, is used to receive first pwm signal, grounded collector with control and driving module.
Wherein, include in second light-adjusting module: N channel field-effect pipe Q4, resistance R 2, voltage stabilizing didoe D2 and NPN triode Q2; Wherein: the source electrode of N channel field-effect pipe Q4 is connected with the anode of current regulator diode D4, and drain electrode is connected with the 2nd LED luminous tube group, and grid is connected with the negative electrode of voltage stabilizing didoe D2 and the emitter of NPN triode Q2; The plus earth of voltage stabilizing didoe D2; One end of resistance R 2 is connected with the positive pole of DC power supplier, and the other end is connected with the emitter of NPN triode Q2 and the negative electrode of voltage stabilizing didoe D2; The base stage of NPN triode Q2 is connected, is used to receive second pwm signal, grounded collector with control and driving module.
Wherein, control and driving module is a single-chip microcomputer, and single-chip microcomputer is used for the control command that receives according to the command reception module, and output has first pwm signal of first duty ratio and second pwm signal with second duty ratio.
The LED light fixture of the utility model has adopted two kinds of White LED luminous tube groups that colour temperature is different; And use the two-way pwm signal to control operating state and the brightness of the LED of these two groups of different-colours respectively one to one; Because colour temperature is different; Change the operating state and the brightness of two groups of White LEDs respectively, can realize the adjusting of two kinds of different-colour mixing ratios, thereby reach the effect that changes brightness and colour temperature.In addition,, simplified circuit greatly, thereby reduced production cost and failure rate, reduced taking system resource owing to only need the two-way pwm signal to come to control one to one two groups of White LEDs that colour temperature is different.
Description of drawings
Accompanying drawing described herein is used to provide the further understanding to the utility model, constitutes the application's a part, and illustrative examples of the utility model and explanation thereof are used to explain the utility model, do not constitute the improper qualification to the utility model.In the accompanying drawings:
Fig. 1 shows the sketch map according to the adjustable LED light fixture of the brightness of the utility model embodiment one and colour temperature;
Fig. 2 shows the sketch map according to the adjustable LED light fixture of the brightness of the utility model embodiment two and colour temperature;
Fig. 3 shows the circuit diagram according to first (or second) LED luminous tube group, first (or second) light-adjusting module and first (or second) constant flow module of the utility model embodiment three;
Fig. 4 shows the circuit diagram according to the adjustable LED light fixture of the brightness of the utility model embodiment three and colour temperature;
Fig. 5 shows the circuit diagram according to the adjustable LED light fixture of the brightness of the utility model embodiment four and colour temperature.
Embodiment
Below with reference to accompanying drawing and combine embodiment, specify the utility model.
Embodiment one
Fig. 1 shows the sketch map according to the adjustable LED light fixture of the brightness of the utility model embodiment one and colour temperature; As shown in Figure 1; This LED light fixture comprises: DC power supplier 10, command reception module 20, control and driving module 30, a LED luminous tube group 40, the 2nd LED luminous tube group 50, first light-adjusting module 60 and second light-adjusting module 70, and the annexation and the function of each module are following:
DC power supplier 10 is used to control and driving module 30, a LED luminous tube group 40 and the 2nd LED luminous tube group 50 operating voltage is provided;
Command reception module 20 is used to receive control command, such as, the control command that the user perhaps sends through other modes through the control command that remote controller is sent, qualification is not done in the utility model embodiment contrast;
Control and driving module 30; Be connected with command reception module 20 with DC power supplier 10; Be used for the control command that receives according to command reception module 20; Output two-way PWM (Pulse-Width Modulation, pulse width modulation) signal is called respectively: first pwm signal and second pwm signal;
LED luminous tube group 40 that colour temperature is different and the 2nd LED luminous tube group 50; Be connected with DC power supplier 10 respectively; Wherein, the LED in a LED luminous tube group 40 and the 2nd LED luminous tube group 50 is white light LEDs, and the colour temperature of the LED in the same LED luminous tube group is identical;
First light-adjusting module 60; Be connected with control and driving module 30 with a LED luminous tube group 40, be used for controlling the operating state (comprise conducting (be luminous or open) and by (promptly not luminous or close)) and the brightness of a LED luminous tube group 40 according to first pwm signal; And
Second light-adjusting module 70; Be connected with control and driving module 30 with the 2nd LED luminous tube group 50, be used for controlling the operating state (comprise conducting (be luminous or open) and by (promptly not luminous or close)) and the brightness of the 2nd LED luminous tube group 50 according to second pwm signal.
The LED light fixture of the utility model embodiment has adopted two kinds of White LED luminous tube groups that colour temperature is different; And use the two-way pwm signal to control operating state and the brightness of the LED of these two groups of different-colours respectively one to one; Because colour temperature is different; Change the operating state and the brightness of two groups of White LEDs respectively, can realize the adjusting of two kinds of different-colour mixing ratios, thereby reach the effect that changes brightness and colour temperature.In addition,, simplified circuit greatly, thereby reduced production cost and failure rate, reduced taking system resource owing to only need the two-way pwm signal to come to control one to one two groups of White LEDs that colour temperature is different.
Embodiment two
As shown in Figure 2; In order to guarantee that two groups of LED in the LED luminous tube group can be operated in optimum state when the LED conducting; The utility model embodiment two has set up two constant flow modules in the LED light fixture: first constant flow module 80 and second constant flow module 90, thus realized that with linear current constant mode be two groups of LED luminous tube group power supplies.
As shown in Figure 2; First constant flow module 80 is connected with first light-adjusting module 60; First constant flow module 80 is used for when a LED luminous tube group 40 work (being conducting), the current value of the LED in the LED luminous tube group 40 of flowing through being maintained the rated working current value of the LED in the LED luminous tube group 40; And; Second constant flow module 90 is connected with second light-adjusting module 70; Second constant flow module 90 is used for when 50 work (being conducting) of the 2nd LED luminous tube group, the current value of the LED in the 2nd LED luminous tube group 50 of flowing through being maintained the rated working current value of the LED in the 2nd LED luminous tube group 50.
The work characteristics of LED is the mode that needs to adopt the constant current power supply, makes it be operated in the state of best light efficiency and MaLS.The electric current of LED has surpassed the rated current of LED if flow through, and then LED will seriously generate heat, and then can shorten the life-span of LED greatly; And, then can have influence on the luminous light efficiency of LED if less than rated current.The utility model embodiment is through being two groups of LED constant flow modules of having connected respectively; This constant flow module can be when the conducting of the LED of series connection with it luminous tube group; The current value of LED in this LED luminous tube group of flowing through is maintained the rated working current value of LED; Thereby make LED when conducting, can be operated in optimum state, effectively prolong the life-span of LED.
In the specific implementation, constant flow module can adopt current regulator diode (CRD belongs to two ends junction field constant current device, can in very wide voltage range, export constant electric current, and have very high motional impedance) to realize.When the LED conducting, current regulator diode guarantees that it is operated in optimum state, can prolong the life-span of LED effectively.The command reception module can be an infrared receiving terminal etc., as long as can receive control command, the utility model embodiment does not do qualification to this.
Embodiment three
Fig. 3 shows the circuit diagram according to first (or second) LED luminous tube group, first (or second) light-adjusting module and first (or second) constant flow module in the LED light fixture of the utility model embodiment three.As shown in Figure 3; In present embodiment three; Embodiment one can be made up of one or more LED of forward series connection with any LED luminous tube group among the embodiment two; Any light-adjusting module can adopt FET to realize, any constant flow module among the embodiment two can adopt current regulator diode to realize, and the constant current value of current regulator diode equates with the rated working current value of LED.
As shown in Figure 3, in a LED luminous tube group or the 2nd LED luminous tube group, a plurality of LED adopt the mode of forward series connection to connect, and wherein, forward series connection is meant that the negative electrode of a LED connects the anode of next LED, by that analogy.The anode of uppermost LED connects the positive pole of DC power supplier (in Fig. 3, representing with VCC), and the negative electrode of nethermost LED connects the drain electrode of FET.And the source electrode of FET is connected with the anode of current regulator diode, the minus earth of current regulator diode.
Then at this moment; The LED light fixture of the utility model embodiment three is as shown in Figure 4, comprising: VCC (being DC power supplier), the White LED 1 of high colour temperature (i.e. a LED luminous tube group); The White LED 2 (i.e. the 2nd LED luminous tube group) of low colour temperature; Current regulator diode D3 (i.e. first constant flow module), D4 (i.e. second constant flow module), N channel field-effect pipe Q3 (i.e. first light-adjusting module), Q4 (i.e. second light-adjusting module), control and driving module (not shown) and command reception module (not shown).Wherein, the negative electrode of last LED is connected with the drain electrode of N channel field-effect pipe Q3 (or Q4) among the LED1 (or LED2), and the anode of first LED is connected with the positive pole of DC power supplier (VCC); The source electrode of FET Q3 (or Q4) is connected with the anode of current regulator diode D3 (or D4), and the minus earth of current regulator diode D3 (or D4) forms the series loop by the current regulator diode Control current.
After the command reception module receives control command, the pwm signal that control and driving module has certain duty ratio according to this control command output two-way: the PWM2 (i.e. second pwm signal) that has the PWM1 (i.e. first pwm signal) of first duty ratio and have second duty ratio.According to Different control instruction, the duty ratio of two-way pwm signal can identical (promptly first duty ratio equals second duty ratio), also can difference (promptly first duty ratio is not equal to second duty ratio).Control and driving module is exported to the grid of FET Q3 with PWM1, and PWM2 is exported to the grid of FET Q4, and come to control respectively the conducting of these two FETs and end, and then conducting and the shutoff of control LED1 and LED2.And pwm signal has certain duty ratio, can control the conducting and the deadline of FET, and then the conducting and the turn-off time (duty ratio of the electric current of the LED that promptly flows through) of control LED luminous tube group, has realized the brightness adjustment of LED luminous tube group.Through conducting, the deadline that changes LED1 and LED2 respectively, can realize the adjustment respectively of the brightness of LED1, LED2.(colour temperature of supposing LED1 is designated as K1 because the colour temperature of LED1 and two groups of luminous tubes of LED2 is different; The colour temperature of LED2 is designated as K2; And K1＞K2); The brightness that changes LED1 and LED2 respectively just can realize changing the effect of colour temperature, that is, the colour temperature of LED light fixture can change between the highest colour temperature K1 and lowest color temperature K2.For example:
(1) luminous as LED1, when LED2 is not luminous, this moment, the colour temperature of LED light fixture was the highest, was K1;
(2) luminous as LED2, when LED1 is not luminous, this moment, the colour temperature of LED light fixture was minimum, was K2;
(3) when the brightness of LED1 and LED2 is identical, this moment, LED light fixture colour temperature was the Neutral colour temp effect.
Particularly, as shown in Figure 4, when PWM1 (or PWM2) is high voltage (concrete magnitude of voltage gets final product more than or equal to the conducting voltage of FET), FET Q3 (or Q4) conducting.After Q3 (or Q4) conducting, the resistance between its drain electrode and the source electrode receives the control of the voltage of grid.Because the conducting of Q3 (or Q4), current regulator diode D3 (or D4) work guarantees to flow through the current value (be the constant current value of D3 (or D4), also be the rated working current value of LED) of value for setting of the electric current of current regulator diode D3 (or D4).(leak, source electrode) (or Q4 (leak, source electrode)) and current regulator diode D3 (or D4) be for being connected in series because light-emitting diode group LED1 (or LED2), FET Q3, so it is also consistent with the current value of above-mentioned setting to flow through the value of electric current of light-emitting diode group LED1 (or LED2).
Otherwise when PWM1 (or PWM2) was low-voltage (concrete magnitude of voltage gets final product less than the conducting voltage of FET), FET Q3 (or Q4) got into cut-off state, and then this moment, LED 1 (or LED2) is not by (luminous).
By on can know, when PWM1 (or PWM2) is high voltage, LED1 (or LED2) conducting (promptly luminous), and when being low-voltage, LED1 (or LED2) is not by (promptly luminous).Therefore; The operating state that PWM1 that can be through having first duty ratio and the PWM2 with second duty ratio come to control one to one respectively LED1 and LED2; And; Because the conducting of LED and the ratio of deadline (or duty ratio of LED electric current) can determine the brightness of LED, therefore, the duty ratio of PWM1 (or PWM2) also can determine the brightness of LED1 (or LED2).So, through the duty ratio that PWM1 and PWM2 come to control one to one respectively the electric current of LED1 and LED2, can control operating state and the brightness of LED1 and LED2 respectively, realize the adjusting of two kinds of different-colour mixing ratios, thereby reach the effect that changes brightness and colour temperature.For example: when the duty ratio of PWM1 equated (promptly first duty ratio equals second duty ratio) with the duty ratio of PWM2, the brightness of LED1 and LED2 was identical, and this moment, LED light fixture colour temperature was the Neutral colour temp effect; The duty ratio of PWM1 be than big must the getting over for a long time of duty ratio of PWM2, LED1 than LED2 is bright must be many more, this moment, the colour temperature of LED light fixture was high more, on the contrary, the colour temperature of LED light fixture is low more.
Embodiment four
As shown in Figure 5, present embodiment four has increased voltage stabilizing circuit and the NPN triode (Q1 and Q2) be made up of resistance (R1 and R2) and voltage stabilizing didoe (D1 and D2) on the circuit base of the foregoing description three.Then at this moment; As shown in Figure 5; The LED light fixture comprises: VCC (being DC power supplier), the White LED 1 of high colour temperature (i.e. a LED luminous tube group), the White LED 2 (i.e. the 2nd LED luminous tube group) of low colour temperature; Current regulator diode D3 (i.e. first constant flow module), D4 (i.e. second constant flow module); First light-adjusting module that insulated-gate type N channel field-effect pipe Q3, resistance R 1, voltage stabilizing didoe D1 and NPN triode Q1 form, second light-adjusting module, control and driving module (not shown) and command reception module (not shown) that insulated-gate type N channel field-effect pipe Q4, resistance R 2, voltage stabilizing didoe D2 and NPN triode Q2 form.Wherein, the voltage stabilizing value of voltage stabilizing didoe D1, D2 is 6～10V; D3, D4 are big electric current current regulator diode, and constant current value is identical with the rated operational current of LED; Resistance R 1=R2=VCC/10000.
As shown in Figure 5, the negative electrode of last LED is connected with the drain electrode of N channel field-effect pipe Q3 (or Q4) among the LED1 (or LED2), and the anode of first LED is connected with the positive pole of DC power supplier (VCC); The source electrode of FET Q3 (or Q4) is connected with the anode of current regulator diode D3 (or D4), and the minus earth of current regulator diode D3 (or D4) forms the series loop by the current regulator diode Control current.PWM1 (i.e. first pwm signal) and PWM2 (i.e. second pwm signal) are the two-way pwm signal of drive control module output, output to the base stage of Q1, two triodes of Q2 respectively; D1 and R1 form voltage stabilizing circuit, are that the grid of Q3 provides a constant voltage when Q1 ends; D2 and R2 form voltage stabilizing circuit, are that the grid of Q4 provides a constant voltage when Q2 ends; The emitter of Q1 links to each other with the grid of Q3, control Q3 conducting and ending; The emitter of Q2 links to each other with the grid of Q4, control Q4 conducting and ending.
Then; After the command reception module receives control command; The pwm signal that control and driving module has certain duty ratio according to control command output two-way: have the PWM1 of first duty ratio and PWM2 with second duty ratio; According to Different control instruction, the duty ratio of two-way pwm signal can identical (promptly first duty ratio equals second duty ratio), also can difference (promptly first duty ratio is not equal to second duty ratio).Control and driving module is exported to PWM1 the base stage of NPN triode Q1; PWM2 is exported to the base stage of NPN triode Q2; Conducting through controlling these two NPN triodes respectively and ending; Come to control one to one respectively the conducting of two FETs and end, and then conducting and the shutoff of control LED1 and LED2.And pwm signal has certain duty ratio, can control the conducting and the deadline of FET, and then the conducting and the turn-off time of control LED luminous tube group, has realized the brightness adjustment of LED luminous tube group.Through conducting, the deadline that changes LED1 and LED2 respectively, can realize the adjustment respectively of the brightness of LED1, LED2.(colour temperature of supposing LED1 is designated as K1 because the colour temperature of LED1 and two groups of luminous tubes of LED2 is different; The colour temperature of LED2 is designated as K2; And K1＞K2); The brightness that changes LED1 and LED2 respectively just can realize changing the effect of colour temperature, that is, the colour temperature of LED light fixture can change between the highest colour temperature K1 and lowest color temperature K2.For example:
(1) luminous as LED1, when LED2 is not luminous, this moment, the colour temperature of LED light fixture was the highest, was K1;
(2) luminous as LED2, when LED1 is not luminous, this moment, the colour temperature of LED light fixture was minimum, was K2;
(3) when the brightness of LED1 and LED2 is identical, this moment, LED light fixture colour temperature was the Neutral colour temp effect.
Particularly, as shown in Figure 5, when PWM1 (or PWM2) is that (concrete magnitude of voltage gets final product less than the conducting voltage of NPN triode low level; For example be 0) time, Q1 (or Q2) ends, and the grid of Q3 (or Q4) receives voltage stabilizing didoe D1 (or D2) control; Its voltage is high level, Q3 (or Q4) conducting.After Q3 (or Q4) conducting, the resistance between its drain electrode and the source electrode receives the control of grid voltage.Because the conducting of Q3 (or Q4), current regulator diode D3 (or D4) work guarantees to flow through the electric current of the electric current of current regulator diode D3 (or D4) for setting.Because belonging to FET Q3 (leakage, source electrode) (or Q4 (leakage, source electrode)) and current regulator diode D3 (or D4), light-emitting diode group LED1 (or LED2) is connected in series, so it is also consistent with the electric current of setting to flow through the electric current of light-emitting diode group LED1 (or LED2).
If the power consumption of current regulator diode D3 (or D4) strengthens, then the voltage at current regulator diode D3 (or D4) two ends can increase.Because the grid voltage of Q3 (or Q4) is controlled by voltage stabilizing didoe D1 (or D2); Remain on a constant voltage; The increase of the voltage at current regulator diode D3 (or D4) two ends can reduce the voltage between Q3 (or Q4) grid and the source electrode; Resistance between its drain electrode and the source electrode is increased, play the effect of protection current regulator diode D3 (or D4).
Otherwise, when PWM1 (or PWM2) is high level (concrete magnitude of voltage only needs to get final product more than or equal to the conducting voltage of NPN triode, for example greater than 0.7V), Q1 (or Q2) conducting, the grid of Q3 (or Q4) is a low level, Q3 (or Q4) gets into cut-off state.Light-emitting diode group LED1 this moment (or LED2) is not by (luminous).
By on can know that when PWM1 (or PWM2) was high voltage, LED1 (or LED2) was not by (promptly luminous), and when being low-voltage, LED1 (or LED2) conducting (promptly luminous).Therefore; The operating state that PWM1 that can be through having first duty ratio and the PWM2 with second duty ratio come to control one to one respectively LED1 and LED2; And; Because the conducting of LED and deadline (or duty ratio of LED electric current) can determine the brightness of LED, therefore, the duty ratio of PWM1 (or PWM2) also can determine the brightness of LED1 (or LED2).So, through the duty ratio that PWM1 and PWM2 come to control one to one respectively the electric current of LED1 and LED2, can control operating state and the brightness of LED1 and LED2 respectively, realize the adjusting of two kinds of different-colour mixing ratios, thereby reach the effect that changes brightness and colour temperature.For example: when the duty ratio of PWM1 equated (promptly first duty ratio equals second duty ratio) with the duty ratio of PWM2, the brightness of LED1 and LED2 was identical, and this moment, LED light fixture colour temperature was the Neutral colour temp effect; The duty ratio of PWM2 be than big must the getting over for a long time of duty ratio of PWM1, LED1 than LED2 is bright must be many more, this moment, the colour temperature of LED light fixture was high more, on the contrary, the colour temperature of LED light fixture is low more.
Obviously, first light-adjusting module among the foregoing description three and the embodiment four and the physical circuit of second light-adjusting module can combination in any.That is to say that when reality was implemented, first light-adjusting module comprised: FET Q3, and second light-adjusting module comprises: FET Q4, resistance R 2, voltage stabilizing didoe D2 and NPN triode Q2; Perhaps, first light-adjusting module comprises: FET Q3, resistance R 1, voltage stabilizing didoe D1 and NPN triode Q1, and second light-adjusting module comprises: FET Q4.
In the foregoing description three and embodiment four, the quantity of the LED that each LED luminous tube group comprises can be according to the actual requirements and the output voltage of DC power supply confirm.Particularly, when the output voltage V c of DC power supplier confirms, can come to confirm the quantity N of LED in the LED luminous tube group according to following formula (1) through the output voltage V c of DC power supplier:
Max{LED quantity }=(Vc-V1)/V2 (1)
Wherein, max{LED quantity } the quantity maximum of LED in the expression LED luminous tube group, Vc is the output voltage of DC power supplier, and V1 representes the conducting voltage of current regulator diode, and V2 is the conducting voltage of LED.Like this, the LED actual quantity N in each LED luminous tube group is less than or equal to max{LED quantity } get final product.When the LED actual quantity N in each LED luminous tube group equals max{LED quantity } time, most effective; When the LED actual quantity N in each LED luminous tube group less than max{LED quantity the time, can increase the power consumption of FET, reduce energy-saving efficiency; When the LED actual quantity N in each LED luminous tube group greater than max{LED quantity the time, can make luminous tube conducting fully, reduce luminous efficiency.
Equally, when the quantity N of the LED in LED luminous tube group confirms, also can come to confirm the output voltage V c of DC power supplier according to following formula (2) through the quantity N of LED in the LED luminous tube group:
Vc＝N×V2+V1 (2)
Wherein, N representes the actual quantity of the LED in the LED luminous tube group, and Vc is the output voltage of DC power supplier, and V1 representes the conducting voltage of current regulator diode, and V2 is the conducting voltage of LED.
When reality is implemented; Control and driving module can use the DC power supply of different voltages to supply power independently respectively with two LED luminous tube groups; At this moment; Can comprise two DC power supplys with different output voltages in the DC power supplier, one of them is the control and driving module power supply, and another is two LED luminous tube group power supplies; Perhaps, DC power supplier also can be a DC power supply, and it can export two kinds of different voltages with different, is respectively control and driving module and two LED luminous tube group power supplies.In addition, the quantity of the LED in LED luminous tube group can adopt higher power voltage supply to LED luminous tube group more for a long time.
In addition, in the foregoing description one to embodiment four, as long as a LED luminous tube group is different with the colour temperature of the 2nd LED luminous tube group; But in practical application, the gap of both colour temperatures can differ more greatly, and color temperature difference is apart from big more; The colour temperature adjustable range of LED light fixture is big more, and the colour temperature of higher that group of colour temperature is high more in two LED luminous tube groups; The colour temperature of that group that colour temperature is lower is low more, and the colour temperature regulating effect of LED light fixture is good more.
The LED light fixture that brightness of the utility model the foregoing description and colour temperature are adjustable can be widely used in normal lighting and ambient lighting.
From above description, can find out that the utility model the above embodiments have realized following technique effect:
(1) two kinds of White LED luminous tube groups that colour temperature is different have been adopted; And use the two-way pwm signal to control operating state and the brightness of the LED of these two groups of different-colours respectively one to one; Because colour temperature is different; Change the operating state and the brightness of two groups of White LEDs respectively, can realize the adjusting of two kinds of different-colour mixing ratios, thereby reach the effect that changes brightness and colour temperature;
(2) owing to only need the two-way pwm signal to come to control one to one two groups of White LEDs that colour temperature is different, simplified circuit greatly, thereby reduced production cost and failure rate, reduced taking system resource;
(3) through being two groups of LED constant flow modules of having connected respectively; This constant flow module can be when the conducting of the LED of series connection with it luminous tube group; The current value of LED in this LED luminous tube group of flowing through is maintained the rated working current value of LED; Thereby make LED when conducting, can be operated in optimum state, effectively prolong the life-span of LED.
The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of the utility model.
Claims (9)
1. brightness and the adjustable light-emitting diode (LED) lamp of colour temperature is characterized in that,
Comprise:
DC power supplier;
The command reception module is used to receive control command;
Control and driving module is connected with said command reception module with said DC power supplier, is used for the control command that receives according to said command reception module, exports the first pulse width modulation (PWM) signal and second pwm signal;
LED luminous tube group that colour temperature is different and the 2nd LED luminous tube group; Be connected with said DC power supplier respectively; Wherein, the LED in a said LED luminous tube group and the 2nd LED luminous tube group is white light LEDs, and the colour temperature of the LED in the same LED luminous tube group is identical;
First light-adjusting module is connected with said control and driving module with a said LED luminous tube group, is used for controlling according to said first pwm signal operating state and the brightness of a said LED luminous tube group; And
Second light-adjusting module is connected with said control and driving module with said the 2nd LED luminous tube group, is used for controlling according to said second pwm signal operating state and the brightness of said the 2nd LED luminous tube group.
2. LED light fixture according to claim 1 is characterized in that, also comprises:
First constant flow module is connected with said first light-adjusting module, is used for when a said LED luminous tube group is worked, the current value of the LED in the said LED luminous tube group being maintained the rated working current value of LED; And
Second constant flow module is connected with said second light-adjusting module, is used for when said the 2nd LED luminous tube group is worked, the current value of the LED in said the 2nd LED luminous tube group being maintained the rated working current value of LED.
3. LED light fixture according to claim 2 is characterized in that,
Said first constant flow module is current regulator diode D3; The anode of said current regulator diode D3 is connected with said first light-adjusting module; Minus earth, and the rated working current value of the LED in the constant current value of said current regulator diode D3 and the said LED luminous tube group equates; And
Said second constant flow module is current regulator diode D4; The anode of said current regulator diode D4 is connected with said second light-adjusting module; Minus earth, and the rated working current value of the LED in the constant current value of said current regulator diode D4 and said the 2nd LED luminous tube group equates.
4. according to each described LED light fixture in the claim 1 to 3, it is characterized in that,
Each LED luminous tube group in a said LED luminous tube group and said the 2nd LED luminous tube group includes forward at least one LED of series connection; And; The anode of the LED of an end is connected with the positive pole of said DC power supplier in said each LED luminous tube group, and the negative electrode of the LED of the other end connects with corresponding light-adjusting module.
5. LED light fixture according to claim 3; It is characterized in that; Said first light-adjusting module is N channel field-effect pipe Q3; The source electrode of said FET Q3 is connected with the anode of said current regulator diode D3, and drain electrode is connected with a said LED luminous tube group, and grid is connected, is used to receive said first pwm signal with said control and driving module.
6. LED light fixture according to claim 5; It is characterized in that; Said second light-adjusting module is N channel field-effect pipe Q4; The source electrode of said FET Q4 is connected with the anode of said current regulator diode D4, and drain electrode is connected with said the 2nd LED luminous tube group, and grid is connected, is used to receive said second pwm signal with said control and driving module.
7. LED light fixture according to claim 6 is characterized in that, includes in said first light-adjusting module: N channel field-effect pipe Q3, resistance R 1, voltage stabilizing didoe D1 and NPN triode Q1; Wherein:
The source electrode of said N channel field-effect pipe Q3 is connected with the anode of said current regulator diode D3, and drain electrode is connected with a said LED luminous tube group, and grid is connected with the negative electrode of said voltage stabilizing didoe D1 and the emitter of said NPN triode Q1;
The plus earth of said voltage stabilizing didoe D1;
One end of said resistance R 1 is connected with the positive pole of said DC power supplier, and the other end is connected with the emitter of said NPN triode Q1 and the negative electrode of said voltage stabilizing didoe D1;
The base stage of said NPN triode Q1 is connected, is used to receive said first pwm signal, grounded collector with said control and driving module.
8. according to claim 5 or 7 described LED light fixtures, it is characterized in that, include in said second light-adjusting module: N channel field-effect pipe Q4, resistance R 2, voltage stabilizing didoe D2 and NPN triode Q2; Wherein:
The source electrode of said N channel field-effect pipe Q4 is connected with the anode of said current regulator diode D4, and drain electrode is connected with said the 2nd LED luminous tube group, and grid is connected with the negative electrode of said voltage stabilizing didoe D2 and the emitter of said NPN triode Q2;
The plus earth of said voltage stabilizing didoe D2;
One end of said resistance R 2 is connected with the positive pole of said DC power supplier, and the other end is connected with the emitter of said NPN triode Q2 and the negative electrode of said voltage stabilizing didoe D2;
The base stage of said NPN triode Q2 is connected, is used to receive said second pwm signal, grounded collector with said control and driving module.
9. according to each described LED light fixture among claim 1-3, the 5-7; It is characterized in that; Said control and driving module is a single-chip microcomputer; Said single-chip microcomputer is used for the control command that receives according to said command reception module, and output has first pwm signal of first duty ratio and second pwm signal with second duty ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120279018 CN202172516U (en) | 2011-08-02 | 2011-08-02 | Brightness and color temperature adjustable LED lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120279018 CN202172516U (en) | 2011-08-02 | 2011-08-02 | Brightness and color temperature adjustable LED lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202172516U true CN202172516U (en) | 2012-03-21 |
Family
ID=45830701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120279018 Expired - Lifetime CN202172516U (en) | 2011-08-02 | 2011-08-02 | Brightness and color temperature adjustable LED lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202172516U (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102665342A (en) * | 2012-05-05 | 2012-09-12 | 无锡捷威电子有限公司 | Light emitting diode (LED) indoor lighting device with the functions of dimming and toning |
| CN102917486A (en) * | 2011-08-02 | 2013-02-06 | 北京同步科技有限公司 | LED lamp adjustable in luminance and color temperature |
| CN103152916A (en) * | 2013-02-01 | 2013-06-12 | 中山市隆源光电有限公司 | Light-emitting diode (LED) lighting lamp with adjustable light and adjustable color temperature and control method thereof |
| CN103220842A (en) * | 2012-12-04 | 2013-07-24 | 涂小兵 | Light emitting diode (LED) light-emitting device achieving color temperature changing and method for achieving color temperature changing |
| CN103874298A (en) * | 2014-03-24 | 2014-06-18 | 涂小兵 | LED light-emitting device achieving color and light adjustment through light regulator and method |
| CN103929852A (en) * | 2014-03-31 | 2014-07-16 | 深圳市九洲光电科技有限公司 | LED lamp with light and color capable of being adjusted |
| CN104519645A (en) * | 2014-11-27 | 2015-04-15 | 上海航空电器有限公司 | PWM (pulse-width modulation) dimming based light guide plate driving circuit |
| CN105704874A (en) * | 2014-11-28 | 2016-06-22 | 上海航空电器有限公司 | PBA driving circuit based on PWM dimming |
| CN107152616A (en) * | 2017-07-11 | 2017-09-12 | 上海顿格电子贸易有限公司 | A kind of intelligent LED bulb lamp of tunable optical color-temperature regulating |
| CN108804375A (en) * | 2018-06-19 | 2018-11-13 | 掌阅科技股份有限公司 | A kind of electronic reader with reading lamp |
| GB2573826A (en) * | 2018-05-15 | 2019-11-20 | Suzhou Radiant Lighting Tech Co Ltd | A method for adjusting the color temperature of a light source in a dimmable light fixture |
| CN115410334A (en) * | 2022-08-29 | 2022-11-29 | 浙江华消科技有限公司 | Flame detection device and method |
-
2011
- 2011-08-02 CN CN 201120279018 patent/CN202172516U/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102917486A (en) * | 2011-08-02 | 2013-02-06 | 北京同步科技有限公司 | LED lamp adjustable in luminance and color temperature |
| WO2013017010A1 (en) * | 2011-08-02 | 2013-02-07 | 北京同步科技有限公司 | Brightness and color temperature adjustable led lamp |
| CN102665342A (en) * | 2012-05-05 | 2012-09-12 | 无锡捷威电子有限公司 | Light emitting diode (LED) indoor lighting device with the functions of dimming and toning |
| CN103220842B (en) * | 2012-12-04 | 2016-03-02 | 涂小兵 | Realize the LED light emission device of colour temperature change and realize the method for colour temperature change |
| CN103220842A (en) * | 2012-12-04 | 2013-07-24 | 涂小兵 | Light emitting diode (LED) light-emitting device achieving color temperature changing and method for achieving color temperature changing |
| CN103152916A (en) * | 2013-02-01 | 2013-06-12 | 中山市隆源光电有限公司 | Light-emitting diode (LED) lighting lamp with adjustable light and adjustable color temperature and control method thereof |
| CN103874298A (en) * | 2014-03-24 | 2014-06-18 | 涂小兵 | LED light-emitting device achieving color and light adjustment through light regulator and method |
| CN103929852A (en) * | 2014-03-31 | 2014-07-16 | 深圳市九洲光电科技有限公司 | LED lamp with light and color capable of being adjusted |
| CN104519645A (en) * | 2014-11-27 | 2015-04-15 | 上海航空电器有限公司 | PWM (pulse-width modulation) dimming based light guide plate driving circuit |
| CN104519645B (en) * | 2014-11-27 | 2019-01-08 | 上海航空电器有限公司 | A kind of guide-lighting drive circuit based on PWM light modulation |
| CN105704874A (en) * | 2014-11-28 | 2016-06-22 | 上海航空电器有限公司 | PBA driving circuit based on PWM dimming |
| CN105704874B (en) * | 2014-11-28 | 2019-01-04 | 上海航空电器有限公司 | A kind of PBA driving circuit based on PWM light modulation |
| CN107152616A (en) * | 2017-07-11 | 2017-09-12 | 上海顿格电子贸易有限公司 | A kind of intelligent LED bulb lamp of tunable optical color-temperature regulating |
| GB2573826A (en) * | 2018-05-15 | 2019-11-20 | Suzhou Radiant Lighting Tech Co Ltd | A method for adjusting the color temperature of a light source in a dimmable light fixture |
| CN108804375A (en) * | 2018-06-19 | 2018-11-13 | 掌阅科技股份有限公司 | A kind of electronic reader with reading lamp |
| CN115410334A (en) * | 2022-08-29 | 2022-11-29 | 浙江华消科技有限公司 | Flame detection device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202172516U (en) | Brightness and color temperature adjustable LED lamp | |
| CN102917486A (en) | LED lamp adjustable in luminance and color temperature | |
| CN102316648B (en) | Light-emitting diode (LED) illuminating device | |
| CN103139992A (en) | Light-emitting diode (LED) dimming driving system with silicon controlled bypass dimming circuit | |
| CN201310774Y (en) | LED illuminating system capable of adjusting color temperature | |
| CN202261957U (en) | Light-emitting diode (LED) lighting device | |
| CN207039947U (en) | A kind of LED lamp circuit of tunable optical and colour temperature | |
| CN108650748A (en) | A kind of constant pressure dimming power source device being compatible with a variety of dimming modes | |
| CN205160868U (en) | Led circuit and led lamp | |
| CN205005298U (en) | LED lamps and lanterns of switch mixing of colors and control circuit thereof | |
| CN104883789A (en) | Constant-current control circuit for LED display device and display device | |
| CN102685989A (en) | PWM (Pulse-Width modulation) dimming method and circuit of LED constant-current source concentratively powered by high-voltage direct current | |
| CN202998610U (en) | LED constant current power supply | |
| CN203352920U (en) | LED (Light Emitting Diode) drive power circuit with switch type conversion output and variable current | |
| CN202998609U (en) | Led constant current dimming power supply | |
| CN205389279U (en) | Light emitting diode (LED) driving power circuit | |
| CN109769320A (en) | A kind of two-wire adjusts the control circuit and control device of lighting programmers | |
| CN110493920A (en) | A kind of automatic control intelligent LED lamp | |
| CN103068127B (en) | A kind of LED lamp and two-color LED dimming circuit | |
| CN202634787U (en) | LED light fixture with sectional color-temperature adjustment | |
| CN103096563A (en) | Dimming control system based on multiple paths of lighting light-emitting diodes (LEDs) | |
| CN201491325U (en) | LED lamp constant current light modulating device | |
| CN203151800U (en) | LED luminaire and bi-color LED dimming circuit | |
| CN202587529U (en) | Pulse width modulation (PWM) dimming circuit for high-voltage direct current centralized power supply light emitting diode (LED) constant current source | |
| CN101865411B (en) | Centralized driving LED colored lantern lighting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120321 |