CN203757403U - LED (Light Emitting Diode) candle lamp with incandescent light bulb dimming effect - Google Patents
LED (Light Emitting Diode) candle lamp with incandescent light bulb dimming effect Download PDFInfo
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- CN203757403U CN203757403U CN201320885219.5U CN201320885219U CN203757403U CN 203757403 U CN203757403 U CN 203757403U CN 201320885219 U CN201320885219 U CN 201320885219U CN 203757403 U CN203757403 U CN 203757403U
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Abstract
The utility model discloses an LED (Light Emitting Diode) candle lamp with an incandescent light bulb dimming effect. The LED candle lamp comprises a base, a lamp housing which is mounted on the upper end of the base, a connector which is mounted in the lower end of the base, a metal heat sink which is mounted on the base, an LED light source module which is mounted on the metal heat sink and a lens which is mounted on the LED light source module, wherein a cavity is formed between the base and the lamp housing; the LED light source module, the lens and the metal sink are all arranged in the cavity; an LED driver is arranged in the cavity between the base and the lamp housing and comprises a control module, a voltage sampling circuit, a half bridge rectifying circuit and an output driving circuit; the half bridge rectifying circuit is connected with the voltage sampling circuit; the control module is provided with a PWM (Pulse-Width Modulation) control chip; the voltage sampling circuit and the output driving circuit are both connected with the PWM control chip; the output driving circuit is connected with the LED light source module. Due to the adoption of the structure, the compatibility is strong, the dimming effect is good, the light source efficiency is high, and LED beads are protected.
Description
Technical field
the utility model relates to LED lighting field, specifically a kind of LED candle 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 candle 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 candle 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 candle lamp, light modulation effect poor performance.In addition, adopt the lamp pearl number of matches of the LED candle 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 candle lamp that dimming behavior is poor, the flimsy problem of LED; a kind of LED candle 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 candle lamp with incandescent lamp dimming effect, comprise base, be installed on base upper end lampshade, be installed on base lower end interface, be arranged on metal heat sink on base, be arranged on the LED light source module on metal heat sink and be arranged on the lens on LED light source module, between described base and outer cover, form and have cavity, described LED light source module, lens and metal heat sink are all located in this cavity; In cavity between described base and lampshade, be also provided with LED driver, described LED driver comprises control module, voltage sampling circuit, Half bridge rectifier circuit and output driving circuit, Half bridge rectifier circuit is connected with voltage sampling circuit, described control module is provided with pwm chip, voltage sampling circuit is all connected with pwm chip with output driving circuit, and described output driving circuit is connected with LED light source module.When the utility model application, heat on metal heat sink is dispersed in air ambient by base, the external TRIAC light modulator of LED driver, alternating current accesses LED driver after by TRIAC light modulator, be converted to low-voltage DC through LED driver, offer LED light source module and export the light of different brightness.
Further, described control module also comprises power field effect pipe and the 4th resistance, the grid of described power field effect pipe is connected with pwm chip and output driving circuit input respectively with drain electrode, described the 4th resistance one end is connected on zero line, the 4th resistance relatively connects the other end of zero line side and the source electrode of power field effect pipe is connected, 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 the second electric capacity, and described the 3rd resistance and the second electric capacity all have one end to be connected on zero line, and the other end that both connect zero line side relatively is all connected with pwm chip.
Further, described voltage sampling circuit comprises the first resistance, the second resistance, the second diode and voltage-stabiliser tube, described first resistance one end is connected with Half bridge rectifier circuit output end, its other end is connected with the second resistance, and the other end that the second resistance connects the first resistance terminal is relatively connected on zero line; The second 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 zero line.
Further, described voltage sampling circuit also comprises the first electric capacity, and described first electric capacity one end is connected on zero line, and its other end is connected on pwm chip.
Further, described Half bridge rectifier circuit comprises the first diode, and described the first diode is connected on live wire.
Further, described output driving circuit comprises inductance and the 3rd diode, and described inductance one end is connected with the drain electrode of power field effect pipe, and its other end is connected to the negative terminal of LED light source module; Described the 3rd diode cathode is connected with power field effect pipe drain electrode, and its negative pole is connected with LED light source module anode.
Further, described Half bridge rectifier circuit is connected with input protection circuit, and described input protection circuit comprises the fusible link being connected on live wire.
Further, described input protection circuit also comprises piezo-resistance, and described piezo-resistance two ends are connected on live wire and zero line.
Further, described LED light source module adopts the COB light source of integration packaging.
When the utility model application, external TRIAC light modulator 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 beneficial effects of the utility model are: (1) the utility model is little for LED candle lamp volume, the characteristic that its inner chamber body is little, and LED driver is designed to the non-isolation type driver of Half bridge rectifier without input and output filter circuit, volume is little, is convenient to install fixing.
(2) LED candle light fitting of the present utility model has the characteristic of linear light sorurce, the therefore strong adaptability to TRIAC light modulator, good dimming effect.LED candle 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 of a specific embodiment of the utility model;
Fig. 2 is the sectional structure schematic diagram of Fig. 1;
Fig. 3 is the theory diagram of LED driver in specific embodiment of the utility model;
Fig. 4 is the circuit theory diagrams of the external LED light source module of LED driver in specific embodiment of the utility model;
Fig. 5 is input voltage waveform figure when LED driver does not connect TRIAC light modulator in specific embodiment of the utility model;
Fig. 6 is output current and voltage oscillogram when LED driver does not connect TRIAC light modulator in specific embodiment of the utility model;
Fig. 7 is input voltage waveform figure when LED driver connects TRIAC light modulator in specific embodiment of the utility model;
Fig. 8 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, LED light source module, 5, LED driver, 6, lens, 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, 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 Fig. 1, shown in Fig. 2 and Fig. 3, a kind of LED candle lamp with incandescent lamp dimming effect, comprise base 1, lampshade 2, interface 3, LED light source module 4, LED driver 5, lens 6 and metal heat sink 7, wherein, LED light source module 4 adopts the COB light source of integration packaging, interface 3 is installed on base 1 lower end, lampshade 2 is installed on base 1 upper end, between base 1 and outer cover 2, form and have cavity, LED light source module 4, LED driver 5, lens 6 and metal heat sink 7 are all located in this cavity, metal heat sink 7 is arranged on base 1, LED light source module 4 is arranged on metal heat sink 7, lens 6 are arranged on LED light source module 4.LED driver 5 comprises control module, voltage sampling circuit, Half bridge rectifier circuit and output driving circuit, Half bridge rectifier circuit is connected with voltage sampling circuit, control module is provided with pwm chip, voltage sampling circuit is all connected with pwm chip with output driving circuit, and output driving circuit is connected with LED light source module 4.
In the present embodiment when application,, while not connecing TRIAC light modulator, alternating current becomes unidirectional Sinusoidal Pulse Waves through Half bridge rectifier circuit conversion, as shown in Figure 5, 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 6, output current and the voltage oscillogram when not connecing TRIAC light modulator.When LED driver 5 connects TRIAC light modulator and during in a certain dimming state, the voltage waveform of electric main is cut a part, the input voltage waveform figure when being illustrated in figure 7 LED driver 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 8, the output current while connecing TRIAC light modulator for LED driver and voltage oscillogram.LED light source module 4 efficient lights are exported corresponding minimizing, thereby play 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 4, 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, the drain electrode of power field effect pipe VT1 is connected with output driving circuit input, the 4th resistance R 4 is as current feedback resistance, the 4th resistance R 4 one end are connected on zero line N, the other end that the 4th resistance R 4 connects zero line N end 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 and the second capacitor C 2 all have one end to be connected on zero line N, the other end that the 3rd resistance R 3 connects zero line N end is relatively connected with the RT pin of pwm chip, and the other end that the second capacitor C 2 connects zero line N end is relatively connected with the VCC pin of pwm chip.
Half bridge rectifier circuit comprises the first diode D1, and it is upper that the first diode D1 is connected on live wire L, and the HV pin of pwm chip is connected on the live wire L of the first diode D1 negative pole connection.Voltage sampling circuit comprises the first resistance R 1, the second resistance R 2, the first capacitor C 1, the second diode D2 and voltage-stabiliser tube DW1, wherein, first resistance R 1 one end connects with the Half bridge rectifier circuit output end live wire L that the first diode D1 negative pole is connected, its other end is connected with the second resistance R 2, and the other end that the second resistance R 2 connects the first resistance R 1 end is relatively connected on zero line N.The second diode D2 positive pole is connected on the circuit between the first resistance R 1 and the second resistance R 2, and 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 the VREF pin of pwm chip, and it is upper that its positive pole is connected to zero line N, and it is upper that first capacitor C 1 one end is connected to zero line N, and its other end is connected on the VREF pin of pwm chip.
Output driving circuit comprises inductance L 1 and the 3rd diode D3, wherein, inductance L 1 one end is connected with the 3rd diode D3 is anodal, on circuit between inductance L 1 and the 3rd diode D3, be connected with the incoming line of output driving circuit, the incoming line of output driving circuit is connected in the drain electrode of power field effect pipe VT1, inductance L 1 other end is connected to the negative terminal of LED light source module 4, and the 3rd diode D3 negative pole is connected with LED light source module 4 anodes.
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: the Half bridge rectifier circuit of the present embodiment is connected with input protection circuit; wherein; input protection circuit comprises fusible link FU and piezo-resistance RV; fusible link FU is connected on the anodal live wire L connecting of the first diode D1; it is upper that piezo-resistance RV one end is connected to zero line N, and its other end is connected on the live wire L between fusible link FU and the first diode D1 positive pole.
As mentioned above, can realize preferably the utility model.
Claims (10)
1. one kind has the LED candle lamp of incandescent lamp dimming effect, it is characterized in that, comprise base (1), be installed on base (1) upper end lampshade (2), be installed on base (1) lower end interface (3), be arranged on metal heat sink (7) on base (1), be arranged on the LED light source module (4) on metal heat sink (7) and be arranged on the lens (6) on LED light source module (4), between described base (1) and outer cover (2), form and have cavity, described LED light source module (4), lens (6) and metal heat sink (7) are all located in this cavity; In cavity between described base (1) and lampshade (2), be also provided with LED driver (5), described LED driver (5) comprises control module, voltage sampling circuit, Half bridge rectifier circuit and output driving circuit, Half bridge rectifier circuit is connected with voltage sampling circuit, described control module is provided with pwm chip, voltage sampling circuit is all connected with pwm chip with output driving circuit, and described output driving circuit is connected with LED light source module (4).
2. a kind of LED candle 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 grid of described power field effect pipe (VT1) is connected with pwm chip and output driving circuit input respectively with drain electrode, described the 4th resistance (R4) one end is connected on zero line (N), the other end that the 4th resistance (R4) connects zero line (N) end 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 candle lamp with incandescent lamp dimming effect according to claim 2, it is characterized in that, described control module also comprises the 3rd resistance (R3) and the second electric capacity (C2), it is upper that described the 3rd resistance (R3) and the second electric capacity (C2) all have one end to be connected to zero line (N), and the other end that both connect zero line (N) end relatively is all connected with pwm chip.
4. a kind of LED candle 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 second diode (D2) and voltage-stabiliser tube (DW1), described the first resistance (R1) one end is connected with Half bridge rectifier circuit output end, 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 on zero line (N); The second diode (D2) 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 zero line (N).
5. a kind of LED candle lamp with incandescent lamp dimming effect according to claim 4, it is characterized in that, described voltage sampling circuit also comprises the first electric capacity (C1), and it is upper that described the first electric capacity (C1) one end is connected to zero line (N), and its other end is connected on pwm chip.
6. a kind of LED candle lamp with incandescent lamp dimming effect according to claim 2, is characterized in that, described Half bridge rectifier circuit comprises the first diode (D1), and described the first diode (D1) is connected on live wire (L).
7. a kind of LED candle lamp with incandescent lamp dimming effect according to claim 2, it is characterized in that, described output driving circuit comprises inductance (L1) and the 3rd diode (D3), described inductance (L1) one end is connected with the drain electrode of power field effect pipe (VT1), and its other end is connected to the negative terminal of LED light source module (4); Described the 3rd diode (D3) is anodal to be connected with power field effect pipe (VT1) drain electrode, and its negative pole is connected with LED light source module (4) anode.
8. a kind of LED candle lamp with incandescent lamp dimming effect according to claim 1, is characterized in that, described Half bridge rectifier circuit is connected with input protection circuit, and described input protection circuit comprises the fusible link (FU) being connected on live wire (L).
9. a kind of LED candle lamp with incandescent lamp dimming effect according to claim 8, is characterized in that, described input protection circuit also comprises piezo-resistance (RV), and described piezo-resistance (RV) two ends are connected on live wire (L) and zero line (N).
10. according to a kind of LED candle lamp with incandescent lamp dimming effect described in any one in claim 1～9, it is characterized in that, described LED light source module (4) adopts the COB light source of integration packaging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320885219.5U CN203757403U (en) | 2013-12-31 | 2013-12-31 | LED (Light Emitting Diode) candle lamp with incandescent light bulb dimming effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320885219.5U CN203757403U (en) | 2013-12-31 | 2013-12-31 | LED (Light Emitting Diode) candle lamp with incandescent light bulb dimming effect |
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| Publication Number | Publication Date |
|---|---|
| CN203757403U true CN203757403U (en) | 2014-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320885219.5U Expired - Fee Related CN203757403U (en) | 2013-12-31 | 2013-12-31 | LED (Light Emitting Diode) candle lamp with incandescent light bulb dimming effect |
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| CN (1) | CN203757403U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106230420A (en) * | 2016-08-31 | 2016-12-14 | 浙江斯大威电器有限公司 | A kind of hair-dryer voltage adaptive identification circuit |
| CN106604490A (en) * | 2015-10-17 | 2017-04-26 | 郑芍 | General type automotive lighting device |
| CN108282926A (en) * | 2018-03-02 | 2018-07-13 | 宁波永贸时代进出口有限公司 | A kind of LED luminous flames circuit for lamp, LED storm lantern and candle lamp |
| CN108495404A (en) * | 2018-03-20 | 2018-09-04 | 佛山薛子企业服务有限公司 | A kind of novel intelligent LED illumination lamp |
-
2013
- 2013-12-31 CN CN201320885219.5U patent/CN203757403U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106604490A (en) * | 2015-10-17 | 2017-04-26 | 郑芍 | General type automotive lighting device |
| CN106230420A (en) * | 2016-08-31 | 2016-12-14 | 浙江斯大威电器有限公司 | A kind of hair-dryer voltage adaptive identification circuit |
| CN106230420B (en) * | 2016-08-31 | 2023-06-30 | 浙江斯大威电器有限公司 | Self-adaptive voltage identification circuit for hair dryer |
| CN108282926A (en) * | 2018-03-02 | 2018-07-13 | 宁波永贸时代进出口有限公司 | A kind of LED luminous flames circuit for lamp, LED storm lantern and candle lamp |
| CN108495404A (en) * | 2018-03-20 | 2018-09-04 | 佛山薛子企业服务有限公司 | A kind of novel intelligent LED illumination lamp |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140806 Termination date: 20171231 |
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| CF01 | Termination of patent right due to non-payment of annual fee |