CN203757402U - LED (Light Emitting Diode) bulb lamp with incandescent light bulb dimming effect - Google Patents
LED (Light Emitting Diode) bulb lamp with incandescent light bulb dimming effect Download PDFInfo
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- CN203757402U CN203757402U CN201320885137.0U CN201320885137U CN203757402U CN 203757402 U CN203757402 U CN 203757402U CN 201320885137 U CN201320885137 U CN 201320885137U CN 203757402 U CN203757402 U CN 203757402U
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Abstract
The utility model discloses an LED (Light Emitting Diode) bulb lamp with an incandescent light bulb dimming effect. The LED bulb lamp comprises a base, a lamp housing, a connector, an LED light source module, an LED driver and a metal heat sink, wherein the connector is connected to the lower end of the base; a bucket shape with an opening in the upper end is formed by the base; the lamp housing seals the upper opening of the base and forms a cavity with the base; the LED light source module, the LED driver and the metal heat sink are all arranged in the cavity; the metal heat sink is embedded in the base; the LED light source module comprises an aluminum-substrate PCB (Printed Circuit Board) and a plurality of LED beads which are mounted on the aluminum-substrate PCB; the aluminum-substrate PCB is mounted on the metal heat sink; the LED driver comprises an input protection circuit, a full bridge rectifying circuit, a voltage sampling circuit, a control module and an output driving circuit which are connected in sequence; the control module is provided with a PWM (Pulse-Width Modulation) control chip; the output driving circuit is connected with the aluminum-substrate PCB. According to the LED bulb lamp with the incandescent light bulb dimming effect, the LED beads can be protected, the light source efficiency is high, and the dimming effect is good.
Description
Technical field
the utility model relates to LED lighting field, specifically a kind of LED bulb lamp with incandescent lamp dimming effect.
Background technology
existing many lighting apparatus have all been equipped with light modulator, carry out light modulation, with saving resource in the situation that not needing 100% brightness.For the good resistive load light source of this class linear characteristic such as incandescent lamp, Metal halogen lamp, generally adopt the TRIAC light modulator of dimming behavior brilliance to carry out light modulation.Because of the light efficiency of incandescent lamp lower, in today of energy scarcity, people adopt high light efficiency, the life-span is long, energy consumption is low LED bulb lamp to carry out replace incandescent in many occasions, but, itself belongs to capacitive load LED, need low-voltage direct to drive, in order to adopt TRIAC light modulator to carry out light modulation to LED bulb lamp, people have been equipped with Switching Power Supply and have adopted the mode of plurality of LEDs series connection to carry out Linear Driving.Because the optimum Working of Switching Power Supply is set in perceptual state conventionally, adopt the mode of plurality of LEDs series connection to show as the capacitive feature of LED, in interval at the transient voltage of input power lower than the conducting voltage of LED, not conducting of LED is luminous, therefore, while adopting TRIAC light modulator to carry out light modulation to existing LED bulb lamp, light modulation effect poor performance.In addition, adopt the lamp pearl number of matches of the LED bulb lamp of linear drive mode to be restricted, do not possess over-voltage protecting function, LED is fragile simultaneously.
Utility model content
The purpose of this utility model is to solve while carrying out now the light modulation of LED lamp band that dimming behavior is poor, the flimsy problem of LED; a kind of LED bulb lamp with incandescent lamp dimming effect is provided; it is to TRIAC light modulator strong adaptability, good dimming effect, and can protect LED lamp pearl.
The technical scheme in the invention for solving the above technical problem is: a kind of LED bulb lamp with incandescent lamp dimming effect, comprise base, lampshade, interface, LED light source module, LED driver and metal heat sink, described interface is connected in base lower end, base forms the staving shape of upper end open, the upper end open of lampshade closed base and form and have a cavity with base, described LED light source module, LED driver and metal heat sink are all located in this cavity, described metal heat sink is embedded on base, described LED light source module comprises aluminum base PCB plate and is arranged on the plurality of LEDs lamp pearl on aluminum base PCB plate, aluminum base PCB plate is arranged on metal heat sink, described LED driver comprises the input protection circuit, full bridge rectifier, voltage sampling circuit, control module and the output driving circuit that connect in turn, and described control module is provided with pwm chip, and described output driving circuit is connected with aluminum base PCB plate.The utility model when application, the external TRIAC light modulator of LED driver, alternating current accesses LED driver after by TRIAC light modulator, is converted to low-voltage DC through LED driver, offers LED light source module and exports the light of different brightness.
Further, described control module also comprises power field effect pipe and the 4th resistance, the drain and gate of described power field effect pipe is connected with output driving circuit input and pwm chip respectively, described full bridge rectifier comprises two inputs and two outputs, described the 4th resistance one end is connected with the negative sense output of full bridge rectifier, the other end that the 4th resistance connects full bridge rectifier negative sense output is relatively connected with the source electrode of power field effect pipe, and circuit between the 4th resistance and power field effect pipe source electrode is connected with pwm chip.
Further, described control module also comprises the 3rd resistance, and described the 3rd resistance one end is connected with the negative sense output of full bridge rectifier, and its other end is all connected with pwm chip.
Further, described control module also comprises the second electric capacity, and described second electric capacity one end is connected with the negative sense output of full bridge rectifier, and its other end is all connected with pwm chip.
Further, described voltage sampling circuit comprises the first resistance, the second resistance, the 5th diode and voltage-stabiliser tube, described first resistance one end is connected with full bridge rectifier forward output, its other end is connected with the second resistance, and the second resistance relatively connects the other end of the first resistance terminal and the negative sense output of full bridge rectifier and is connected; The 5th diode cathode is connected on the circuit between the first resistance and the second resistance, and its negative pole is connected on pwm chip; Described voltage-stabiliser tube negative pole is connected on the circuit between the second diode and pwm chip, and its positive pole is connected on full bridge rectifier negative sense output.
Further, described voltage sampling circuit also comprises the first electric capacity, and first electric capacity one end is connected on full bridge rectifier negative sense output, and its other end is connected on pwm chip.
Further, described full bridge rectifier comprises the first diode, the second diode, the 3rd diode and the 4th diode, the both positive and negative polarity of described the first diode is connected with the 3rd diode cathode and the second diode cathode respectively, and the both positive and negative polarity of the 4th diode is connected with the 3rd diode cathode and the second diode cathode respectively; An input of described full bridge rectifier is arranged on the circuit between the first diode cathode and the 3rd diode cathode, another input is arranged on the circuit between the second diode cathode and the 4th diode cathode, the forward output of full bridge rectifier is arranged on the circuit between the first diode cathode and the second diode cathode, and its negative sense output is arranged on the circuit between the 3rd diode cathode and the 4th diode cathode.
Further, described output driving circuit comprises inductance and the 6th diode, described inductance two ends are connected with LED light source module anode and the 6th diode cathode respectively, circuit between the 6th diode cathode and inductance is connected with power field effect pipe drain electrode, described the 6th diode cathode is connected with LED light source module negative terminal, and the circuit between the 6th diode cathode and LED light source module negative terminal is connected with the forward output of full bridge rectifier.
Further, described full bridge rectifier two inputs are connected with respectively live wire and zero line, and described input protection circuit comprises fusible link, and described fusible link is connected on the live wire of full bridge rectifier input connection.
Further, described input protection circuit also comprises piezo-resistance, and described piezo-resistance one end is connected on the zero line of full bridge rectifier input connection, and its other end is connected on the live wire between fusible link and full bridge rectifier input.
When the utility model application, the external TRIAC light modulator of LED driver while needing light modulation, the voltage required according to load, the fixing dutycycle of default pwm chip, the external reference voltage interface of pwm chip is as guard signal input, at external reference voltage interface shunt regulator tube, when voltage is during higher than the canonical reference voltage of pwm chip, the negative feedback network that output voltage is made up of the 4th resistance that is connected on power field effect pipe source electrode is determined, when external reference voltage is during lower than the canonical reference voltage of pwm chip, output voltage is determined by the fixed duty cycle of presetting.Thereby realize, within the operating voltage range allowing, switch is in fixing frequency, and output voltage changes with input voltage; When input voltage is higher than allowing when input voltage range, output voltage is limited in default magnitude of voltage.
In sum, the utlity model has following beneficial effect: LED bulb lamp of the present utility model has the characteristic of linear light sorurce, the therefore strong adaptability to TRIAC light modulator, good dimming effect.LED bulb lamp of the present utility model has the characteristic of Switching Power Supply; therefore the efficiency of fluorescent tube is high; LED driver, by detecting input voltage, arranges over-voltage protection point, under the state lower than over-voltage protection point; with fixed duty cycle and frequency work; higher than the state of high voltage protective point, by default backfeed loop, change dutycycle and reduce output voltage; thereby reduction electric current, to protect LED lamp pearl.
Brief description of the drawings
Fig. 1 is the structural representation after specific embodiment of the utility model partly cuts open;
Fig. 2 is the theory diagram of LED driver in specific embodiment of the utility model;
Fig. 3 is the circuit theory diagrams of the external LED light source module of LED driver in specific embodiment of the utility model;
Fig. 4 is input voltage waveform figure when LED driver does not connect TRIAC light modulator in specific embodiment of the utility model;
Fig. 5 is output current and voltage oscillogram when LED driver does not connect TRIAC light modulator in specific embodiment of the utility model;
Fig. 6 is input current and voltage oscillogram when LED driver connects TRIAC light modulator in specific embodiment of the utility model;
Fig. 7 is output current and voltage oscillogram when LED driver connects TRIAC light modulator in specific embodiment of the utility model.
In accompanying drawing, the corresponding parts name of mark is called: 1, base, 2, lampshade, 3, interface, 4, aluminum base PCB plate, 5, LED lamp pearl, 6, LED driver, 7, metal heat sink, L, live wire, N, zero line, FU, fusible link, RV, piezo-resistance, DW1, voltage-stabiliser tube, VT1, FET, L1, inductance, D1, the first diode, D2, the second diode, D3, the 3rd diode, D4, the 4th diode, D5, the 5th diode, D6, the 6th diode, R1, the first resistance, R2, the second resistance, R3, the 3rd resistance, R4, the 4th resistance, C1, the first electric capacity, C2, the second electric capacity.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the utility model is done to detailed description further, but embodiment of the present utility model is not limited to this.
Embodiment 1:
As shown in Figures 1 and 2, a kind of LED bulb lamp with incandescent lamp dimming effect, comprise base 1, lampshade 2, interface 3, LED light source module, LED driver 6 and metal heat sink 7, wherein, base 1 is adopted made of plastic, and radiator structure is set on it, base 1 forms up big and down small staving shape, its inner hollow and upper end open, interface 3 is connected in base 1 lower end, and lampshade 2 is connected with base 1 and the upper end open of closed base 1.Lampshade 2 forms and has cavity with base 1, LED light source module, LED driver 6 and metal heat sink 7 are all located in this cavity, metal heat sink 7 is embedded on base 1, LED light source module comprises aluminum base PCB plate 4 and is arranged on the plurality of LEDs lamp pearl 5 on aluminum base PCB plate 4, and aluminum base PCB plate 4 is arranged on metal heat sink 7.In the present embodiment, LED light source module adopts plurality of LEDs lamp pearl 5, and plurality of LEDs lamp pearl 5 adopts series and parallel connections in conjunction with forming " order " word structure, also can adopt in actual applications other topological structure, as multi-channel parallel.LED light source module also can adopt in multiple LED chip integration packagings to unit, or by the LED cell formation of multiple such integration packagings.LED driver 6 comprises the input protection circuit, full bridge rectifier, voltage sampling circuit, control module and the output driving circuit that connect in turn; control module is provided with pwm chip; pwm chip is connected with full bridge rectifier, and output driving circuit is connected with aluminum base PCB plate 4.
In the present embodiment when application,, while not connecing TRIAC light modulator, alternating current converts unidirectional Sinusoidal Pulse Waves to through full bridge rectifier, as shown in Figure 4, and the input voltage waveform figure when not connecing TRIAC light modulator.By default specified output current corresponding to operating voltage of pwm chip, voltage sampling circuit sampled signal is judged the mode of operation of pwm chip, if sampled signal is less than the reference voltage of pwm chip, the dutycycle work of pwm chip to fix, as shown in Figure 5, output current and the voltage oscillogram when not connecing TRIAC light modulator.When LED driver 1 connects TRIAC light modulator and during in a certain dimming state, the voltage waveform of electric main is cut a part, input current and voltage oscillogram when being illustrated in figure 6 LED driver 1 and connecing TRIAC light modulator.The phase place of excision, pwm chip is not worked, no-output electric current, output current wave as shown in Figure 7, the output current while connecing TRIAC light modulator for LED driver 1 and voltage oscillogram.LED light source module efficient light is exported corresponding minimizing, thereby plays the effect of light modulation.If the signal of sampling is greater than the reference voltage of pwm chip, pwm chip is adjusted output signal, reaches the effect that reduces output current.
Embodiment 2:
As shown in Figure 3, the present embodiment has been made following further restriction on the basis of embodiment 1: the control module of the present embodiment also comprises power field effect pipe VT1, the 3rd resistance R 3, the 4th resistance R 4 and the second capacitor C 2, wherein, power field effect pipe VT1 adopts N channel enhancement MOS field-effect transistor, and pwm chip is provided with energization pins HV pin, reference voltage pin VREF pin, control pin RT pin, negative-feedback input pin CS pin, output control pin DRV pin and power pins VCC pin.The grid of power field effect pipe VT1 is connected with the DRV pin of pwm chip, and the drain electrode of power field effect pipe VT1 is connected with driver output circuit input end.Full bridge rectifier comprises two inputs and two outputs, the 4th resistance R 4 is as current feedback resistance, the 4th resistance R 4 one end are connected with the negative sense output of full bridge rectifier, the other end that the 4th resistance R 4 connects full bridge rectifier negative sense output is relatively connected with the source electrode of power field effect pipe VT1, and circuit between the 4th resistance R 4 and power field effect pipe VT1 source electrode is connected with the CS pin of pwm chip.The 3rd resistance R 3 all has one end to be connected with the negative sense output of full bridge rectifier with the second capacitor C 2, the other end that the 3rd resistance R 3 connects full bridge rectifier negative sense output is relatively connected with the RT pin of pwm chip, and the other end that the second capacitor C 2 connects full bridge rectifier negative sense output is relatively connected with the VCC pin of pwm chip.
The voltage sampling circuit of the present embodiment comprises the first resistance R 1, the second resistance R 2, the first capacitor C 1, the 5th diode D5 and voltage-stabiliser tube DW1, wherein, first resistance R 1 one end is connected with full bridge rectifier forward output, its other end is connected with the second resistance R 2, and the second resistance R 2 relatively connects first other end of resistance R 1 end and the negative sense output of full bridge rectifier and is connected.The 5th diode D5 positive pole is connected on the circuit between the first resistance R 1 and the second resistance R 2, its negative pole is connected on the VREF pin of pwm chip, voltage-stabiliser tube DW1 negative pole is connected on the circuit between the second diode D2 and pwm chip, and its positive pole is connected on full bridge rectifier negative sense output.First capacitor C 1 one end is connected on full bridge rectifier negative sense output, and its other end is connected on the VREF pin of pwm chip.
The full bridge rectifier of the present embodiment comprises the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4, wherein, the both positive and negative polarity of the first diode D1 is connected with the 3rd diode D3 negative pole and the second diode D2 negative pole respectively, and the both positive and negative polarity of the 4th diode D4 respectively and second diode D2 positive pole anodal with the 3rd diode D3 is connected.An input of full bridge rectifier is arranged on the circuit between the first diode D1 positive pole and the 3rd diode D3 negative pole, another input is arranged on the circuit between the second diode D2 positive pole and the 4th diode D4 negative pole, the forward output of full bridge rectifier is arranged on the circuit between the first diode D1 negative pole and the second diode D2 negative pole, and its negative sense output is arranged on the circuit between the 3rd diode D3 positive pole and the 4th diode D4 positive pole.
The output driving circuit of the present embodiment comprises inductance L 1 and the 6th diode D6, inductance L 1 two ends are connected with LED light source module anode and the 6th diode D6 positive pole respectively, circuit between the 6th diode D6 positive pole and inductance L 1 is connected with power field effect pipe VT1 drain electrode, the 6th diode D6 negative pole is connected with LED light source module negative terminal, and the circuit between the 6th diode D6 negative pole and LED light source module negative terminal is connected with the forward output of full bridge rectifier.
When the present embodiment application, if the signal of sampling is greater than the reference voltage of pwm chip, the sampled signal of the 4th resistance R 4 is effective, sampled signal enters pwm chip by the CS pin of pwm chip, to adjust the output signal of DRV pin of pwm chip, reach the effect that reduces output current.
Embodiment 3:
The present embodiment has been made following further restriction on the basis of embodiment 2: full bridge rectifier two inputs of the present embodiment are connected with respectively live wire L and zero line N; input protection circuit comprises fusible link FU and piezo-resistance RV; fusible link FU is connected on the live wire L of full bridge rectifier input connection; piezo-resistance RV one end is connected on the zero line N of full bridge rectifier input connection, and its other end is connected on the live wire L between fusible link FU and full bridge rectifier input.
As mentioned above, can realize preferably the utility model.
Claims (10)
1. one kind has the LED bulb lamp of incandescent lamp dimming effect, it is characterized in that, comprise base (1), lampshade (2), interface (3), LED light source module, LED driver (6) and metal heat sink (7), described interface (3) is connected in base (1) lower end, base (1) forms the staving shape of upper end open, the upper end open of lampshade (2) closed base (1) and form and have a cavity with base (1), described LED light source module, LED driver (6) and metal heat sink (7) are all located in this cavity, described metal heat sink (7) is embedded on base (1), described LED light source module comprises aluminum base PCB plate (4) and is arranged on the plurality of LEDs lamp pearl (5) on aluminum base PCB plate (4), aluminum base PCB plate (4) is arranged on metal heat sink (7), described LED driver (6) comprises the input protection circuit, full bridge rectifier, voltage sampling circuit, control module and the output driving circuit that connect in turn, described control module is provided with pwm chip, and described output driving circuit is connected with aluminum base PCB plate (4).
2. a kind of LED bulb lamp with incandescent lamp dimming effect according to claim 1, it is characterized in that, described control module also comprises power field effect pipe (VT1) and the 4th resistance (R4), the drain and gate of described power field effect pipe (VT1) is connected with output driving circuit input and pwm chip respectively, described full bridge rectifier comprises two inputs and two outputs, described the 4th resistance (R4) one end is connected with the negative sense output of full bridge rectifier, the other end that the 4th resistance (R4) connects full bridge rectifier negative sense output is relatively connected with the source electrode of power field effect pipe (VT1), and the circuit between the 4th resistance (R4) and power field effect pipe (VT1) source electrode is connected with pwm chip.
3. a kind of LED bulb lamp with incandescent lamp dimming effect according to claim 2, it is characterized in that, described control module also comprises the 3rd resistance (R3), described the 3rd resistance (R3) one end is connected with the negative sense output of full bridge rectifier, and its other end is all connected with pwm chip.
4. a kind of LED bulb lamp with incandescent lamp dimming effect according to claim 2, it is characterized in that, described control module also comprises the second electric capacity (C2), described the second electric capacity (C2) one end is connected with the negative sense output of full bridge rectifier, and its other end is all connected with pwm chip.
5. a kind of LED bulb lamp with incandescent lamp dimming effect according to claim 2, it is characterized in that, described voltage sampling circuit comprises the first resistance (R1), the second resistance (R2), the 5th diode (D5) and voltage-stabiliser tube (DW1), described the first resistance (R1) one end is connected with full bridge rectifier forward output, its other end is connected with the second resistance (R2), and the other end that the second resistance (R2) connects the first resistance (R1) end is relatively connected with the negative sense output of full bridge rectifier; The 5th diode (D5) positive pole is connected on the circuit between the first resistance (R1) and the second resistance (R2), and its negative pole is connected on pwm chip; Described voltage-stabiliser tube (DW1) negative pole is connected on the circuit between the second diode (D2) and pwm chip, and its positive pole is connected on full bridge rectifier negative sense output.
6. a kind of LED bulb lamp with incandescent lamp dimming effect according to claim 5, it is characterized in that, described voltage sampling circuit also comprises the first electric capacity (C1), the first electric capacity (C1) one end is connected on full bridge rectifier negative sense output, and its other end is connected on pwm chip.
7. a kind of LED bulb lamp with incandescent lamp dimming effect according to claim 2, it is characterized in that, described full bridge rectifier comprises the first diode (D1), the second diode (D2), the 3rd diode (D3) and the 4th diode (D4), the both positive and negative polarity of described the first diode (D1) is connected with the 3rd diode (D3) negative pole and the second diode (D2) negative pole respectively, and the both positive and negative polarity of the 4th diode (D4) respectively and second diode (D2) positive pole anodal with the 3rd diode (D3) is connected; An input of described full bridge rectifier is arranged on the circuit between the first diode (D1) positive pole and the 3rd diode (D3) negative pole, another input is arranged on the circuit between the second diode (D2) positive pole and the 4th diode (D4) negative pole, the forward output of full bridge rectifier is arranged on the circuit between the first diode (D1) negative pole and the second diode (D2) negative pole, and its negative sense output is arranged on the circuit between the 3rd diode (D3) positive pole and the 4th diode (D4) positive pole.
8. a kind of LED bulb lamp with incandescent lamp dimming effect according to claim 2, it is characterized in that, described output driving circuit comprises inductance (L1) and the 6th diode (D6), described inductance (L1) two ends are connected with LED light source module anode and the 6th diode (D6) positive pole respectively, circuit between the 6th diode (D6) positive pole and inductance (L1) is connected with power field effect pipe (VT1) drain electrode, described the 6th diode (D6) negative pole is connected with LED light source module negative terminal, circuit between the 6th diode (D6) negative pole and LED light source module negative terminal is connected with the forward output of full bridge rectifier.
9. according to a kind of LED bulb lamp with incandescent lamp dimming effect described in any one in claim 2～8; it is characterized in that; described full bridge rectifier two inputs are connected with respectively live wire (L) and zero line (N); described input protection circuit comprises fusible link (FU), and described fusible link (FU) is connected on the live wire (L) of full bridge rectifier input connection.
10. a kind of LED bulb lamp with incandescent lamp dimming effect according to claim 9; it is characterized in that; described input protection circuit also comprises piezo-resistance (RV); described piezo-resistance (RV) one end is connected on the zero line (N) of full bridge rectifier input connection, and its other end is connected on the live wire (L) between fusible link (FU) and full bridge rectifier input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320885137.0U CN203757402U (en) | 2013-12-31 | 2013-12-31 | LED (Light Emitting Diode) bulb lamp with incandescent light bulb dimming effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320885137.0U CN203757402U (en) | 2013-12-31 | 2013-12-31 | LED (Light Emitting Diode) bulb lamp with incandescent light bulb dimming effect |
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| Publication Number | Publication Date |
|---|---|
| CN203757402U true CN203757402U (en) | 2014-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320885137.0U Expired - Fee Related CN203757402U (en) | 2013-12-31 | 2013-12-31 | LED (Light Emitting Diode) bulb lamp with incandescent light bulb dimming effect |
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| CN (1) | CN203757402U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107205297A (en) * | 2017-06-14 | 2017-09-26 | 南昌大学 | A kind of combination LED illumination and the method for heat radiation illumination |
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2013
- 2013-12-31 CN CN201320885137.0U patent/CN203757402U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107205297A (en) * | 2017-06-14 | 2017-09-26 | 南昌大学 | A kind of combination LED illumination and the method for heat radiation illumination |
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Granted publication date: 20140806 Termination date: 20171231 |