A flicker-free led filament lamp

An LED filament lamp, no stroboscopic technology, applied in the use of semiconductor lamps, cooling/heating devices of lighting devices, lighting and heating equipment, etc. The circuit structure is simple, the constant current precision is high, and the volume is small.

Active Publication Date: 2017-10-03
ZHEJIANG SUNSHINE MEIJIA LIGHTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the RC step-down drive power supply has fewer components, simple structure, and small size, but it will cause serious flickering of the LED filament, which is not conducive to human health; although the switching power supply type has no flickering problem, but There are many components, the structure is complex, and the volume is large, which is difficult to accommodate in the inner cavity of a small metal lamp holder; the linear constant current drive power supply has few components, the structure is relatively simple, the price is relatively low, and the dimming range is large. It can be accommodated in the inner cavity of a small metal lamp holder, but the stroboscopic problem of the LED filament is not serious, but it still exists and needs to be improved, and the power consumption is large, resulting in a large amount of heat. Although the existing heat dissipation measures can be used to make the drive The temperature of the power supply will not increase, but the structure of the existing heat dissipation structure is complicated

Method used

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  • A flicker-free led filament lamp
  • A flicker-free led filament lamp
  • A flicker-free led filament lamp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A flicker-free LED filament lamp proposed in this embodiment, such as figure 1 , figure 2 and image 3 As shown, it includes a metal lamp cap 1, a glass bulb 2, a linear constant-current driving power supply 9 arranged in the inner cavity of the metal lamp cap 1, a stem 3, an LED illuminator 4, and a dimmer (not shown in the figure). out), the top of the core column 3 is provided with a bracket 5, the LED illuminant 4 is installed on the bracket 5, and the core column 3 loaded with the LED illuminant 4 is placed in the glass bulb 2, and is sealed with the glass bulb 2. Cavity 6, the airtight cavity 6 is filled with dry air, inert gas (such as nitrogen, argon, etc.) or heat-conducting gas (such as helium, hydrogen, etc.), etc. The driving power supply 9 in the inner cavity of the metal lamp cap 1 is connected, the metal lamp cap 1 is bonded and fixed with the glass bulb 2, and the driving power supply 9 is maintained by the overcurrent protection unit 91, the rectific...

Embodiment 2

[0027] The other structures of the non-stroboscopic LED filament lamp proposed in this embodiment are the same as those of the non-stroboscopic LED filament lamp of the first embodiment. like Figure 4 As shown, the anti-flicker circuit using chips includes a first constant current chip U1, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, and a tenth resistor R9. The resistor R10, the eleventh resistor R11, the second capacitor C2, the third capacitor C3 and the fourth capacitor C4, the first pin of the first constant current chip U1 is connected to one end of the fifth resistor R5, the The second pin is respectively connected to one end of the sixth resistor R6, one end of the seventh resistor R7, one end of the eighth resistor R8, one end of the ninth resistor R9 and one end of the tenth resistor R10, and the other end of the sixth resistor R6 is grounded. The third pin of the first constant c...

Embodiment 3

[0029] A flicker-free LED filament lamp proposed in this embodiment further improves the structure of the flicker-free LED filament lamp in embodiment 1 or embodiment 2, see figure 1 That is, a heat dissipation structure capable of effectively dissipating heat to the driving power supply 9 is also added. The heat dissipation structure is a heat dissipation layer 8 formed by a layer of heat dissipation material wrapped outside the surface of the driving power supply 9. The driving power supply 9 wrapped with the heat dissipation layer 8 is placed on the metal In the inner cavity of the lamp cap 1, the heat dissipation layer 8 is in contact with the inner wall of the metal lamp cap 1, so that the heat of the driving power supply 9 is transferred to the metal lamp cap 1 through the heat dissipation layer 8, and the heat dissipation material is heat dissipation mud or heat dissipation glue. The heat of the heat can be transferred to the metal lamp holder 1 through the heat-conducti...

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Abstract

The invention discloses a flicker-free LED filament lamp, which comprises a linear constant current type driving power supply and an LED illuminator. The driving power supply is composed of an overcurrent protection unit, a rectification filter unit, a linear constant current unit, a constant current filter unit and a It is composed of a de-strobe unit that converts the output current of the constant current filter unit into a direct current with no current ripple. The input end of the overcurrent protection unit is connected to the alternating current of the mains, and the output end of the overcurrent protection unit is connected to the input end of the rectifier filter unit. Connection, the output end of the rectification filter unit is connected with the input end of the linear constant current unit, the output end of the linear constant current unit is connected with the input end of the constant current filter unit, the output end of the constant current filter unit is connected with the input end of the strobe removal unit The output end of the de-strobe unit is connected to the LED illuminator; the advantage is that the introduction of the de-strobe unit further eliminates the current ripple, and the constant current precision is high, so that the LED high-voltage filament in the LED illuminator will not emit light. Flicker phenomenon.

Description

technical field [0001] The invention relates to an LED filament lamp, in particular to a flicker-free LED filament lamp. Background technique [0002] The LED filament is formed by bonding and connecting many ultraviolet or blue LED chips on a strip substrate, and then covering the strip substrate and the ultraviolet or blue LED chips with phosphor glue. The ultraviolet or blue LED chips emit light and phosphors emit light. Combined into white light for illumination, the working voltage of the LED filament is generally around 30-80V. [0003] LED filament lamps are more and more popular, especially in Europe and America. The LED filament lamp generally includes a transparent bulb, a metal lamp cap, an LED filament and a driving power supply. The LED filament is located in the transparent bulb, and the driving power supply is placed in the inner cavity of the metal lamp cap. The metal lamp cap is connected to the mouth of the transparent bulb. Since ultraviolet or blue LED ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B33/08F21K9/232F21K9/238F21V23/02F21V23/04F21V29/508F21V29/85F21Y115/10H05B44/00
CPCF21V23/02F21V23/04F21V29/508F21V29/85H05B45/395H05B45/10Y02B20/30
Inventor 钟玲祥李阳徐泉江
Owner ZHEJIANG SUNSHINE MEIJIA LIGHTING CO LTD
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