LED filament light bulb is a LED lamp which is designed to resemble a traditional incandescent light bulb with visible filaments, for aesthetic purposes. It produces its light by LED filaments, multi-diode structures that resemble the filament of an incandescent light bulb. They are designed as drop-in replacements for conventional clear incandescent bulbs used in decorative light fixtures, such as table lamps, pendant lights, chandeliers, and bulb-based candelabras. They have the appearance of traditional incandescent bulbs but the higher efficiency of light emitting diodes (LEDs).
The LED filament consists of multiple series-connected LEDs on a transparent substrate,These transparent substrates are made of glass or sapphire materials. This transparency allows the emitted light to disperse evenly and uniformly without any interference. An even coating of yellow phosphor in a silicone resin binder material converts the blue light generated by the LEDs into white light Degradation of silicone binder, and leakage of blue light are design issues in LED filament lights.
Positive benefits of the LED design are potential higher efficiencies by the use of more LED emitters from lower driving currents. A major benefit of the design is the ease with which near full "global" illumination can be obtained from arrays of filaments]
Lifespan of LED emitters is reduced by high operating temperatures. LED filament bulbs have many smaller, lower power LED chips than other types, avoiding the need for a heatsink, but they must still pay attention to thermal management; multiple heat dissipation paths are needed for reliable operation. The lamp may contain a high thermal conductivity gas (helium) blend to better conduct heat from the LED filament to the glass bulb,] The LED filaments can be arranged to optimise heat dissipation. The life expectancy of the LED chips correlates to the junction temperature (Tj); light output falls faster with time at higher junction temperatures (the "Droop Effect"). Achieving a 30,000 hour life expectancy while maintaining 90% luminous flux requires the junction temperature to be maintained below 85°C.
2:Applications:
LED filament lamp has been designed to retrofit existing incandescent and halogen installations in recessed fixtures,thereby reducing maintenance and energy expenditures - and as an energy saving light source for new fixtures and installations.
• Task lighting
• Hospitality lighting
• Residential lighting
3:Installation Notes:
• Do not install in enclosed or recessed fixtures
How we guarantee the quality
1: All materials of LED lights was purchased from qualified suppliers,and the light source is from brand manufacturer,which to    ensure high quality
2: Working instruction is to be stricted executing by employees and quality engineers will follow  in all processingÂ
3: According to the method of document "FMEA" and "control plan". pay attention on some details
4: 24 hours Burn-in test which can ensure defectives to be found in factory.
5: Good packing method which make sure led light cann't be damaged before delivery.
6: OQA inspection is must before delivery
7:,Warranty: 3 years warranty, and you can be offer free return & repair if any quality problems happened.
Â
LED filament light bulb is a LED lamp which is designed to resemble a traditional incandescent light bulb with visible filaments, for aesthetic purposes. It produces its light by LED filaments, multi-diode structures that resemble the filament of an incandescent light bulb. They are designed as drop-in replacements for conventional clear incandescent bulbs used in decorative light fixtures, such as table lamps, pendant lights, chandeliers, and bulb-based candelabras. They have the appearance of traditional incandescent bulbs but the higher efficiency of light emitting diodes (LEDs).
The LED filament consists of multiple series-connected LEDs on a transparent substrate,These transparent substrates are made of glass or sapphire materials. This transparency allows the emitted light to disperse evenly and uniformly without any interference. An even coating of yellow phosphor in a silicone resin binder material converts the blue light generated by the LEDs into white light Degradation of silicone binder, and leakage of blue light are design issues in LED filament lights.
Positive benefits of the LED design are potential higher efficiencies by the use of more LED emitters from lower driving currents. A major benefit of the design is the ease with which near full "global" illumination can be obtained from arrays of filaments]
Lifespan of LED emitters is reduced by high operating temperatures. LED filament bulbs have many smaller, lower power LED chips than other types, avoiding the need for a heatsink, but they must still pay attention to thermal management; multiple heat dissipation paths are needed for reliable operation. The lamp may contain a high thermal conductivity gas (helium) blend to better conduct heat from the LED filament to the glass bulb,] The LED filaments can be arranged to optimise heat dissipation. The life expectancy of the LED chips correlates to the junction temperature (Tj); light output falls faster with time at higher junction temperatures (the "Droop Effect"). Achieving a 30,000 hour life expectancy while maintaining 90% luminous flux requires the junction temperature to be maintained below 85°C.
2:Applications:
LED filament lamp has been designed to retrofit existing incandescent and halogen installations in recessed fixtures,thereby reducing maintenance and energy expenditures - and as an energy saving light source for new fixtures and installations.
• Task lighting
• Hospitality lighting
• Residential lighting
3:Installation Notes:
• Do not install in enclosed or recessed fixtures
How we guarantee the quality
1: All materials of LED lights was purchased from qualified suppliers,and the light source is from brand manufacturer,which to    ensure high quality
2: Working instruction is to be stricted executing by employees and quality engineers will follow  in all processingÂ
3: According to the method of document "FMEA" and "control plan". pay attention on some details
4: 24 hours Burn-in test which can ensure defectives to be found in factory.
5: Good packing method which make sure led light cann't be damaged before delivery.
6: OQA inspection is must before delivery
7:,Warranty: 3 years warranty, and you can be offer free return & repair if any quality problems happened.
Â
Flex PCB Assembly = Flex Printed Circuit Board Assembly, which means the PCB Board is flexible. Normally, flex PCB is made with PI or ultra-thin FR4 and it's very thin. Normally, Flexible PCB would need carriers for SMT assembly if by machine. Zhongfeng would manufacture the PCB boards follow the design file, source the components follow the BOM file and do the PCB Assembly job using carriers to follow the assembly drawing and the pick&place file. After PCB assembly done, the components would be mounted on the PCB boards tightly and connected each other through the copper circuits. We call such board as PCBA board or flex PCBA board.
Depends on the components assembly types, it have THT PCB assembly, SMT PCB Assembly , one sided SMT and THT PCB assembly, two sided SMT and THT PCB assembly.
Depends on the PCB type, it have Rigid PCB Assembly, Flex PCB assembly and Flex-Rigid PCB Assembly.
Also we would call some PCB assembly types as Prototype PCB Assembly, Mass PCB Assembly , Turnkey PCB Assembly, LED PCB Assembly and BGA PCB Assembly , etc.
With our 15years professional experience, we are available for all types of PCB assembly service from prototype to mass production, available for 01005, 0201, 0.3mm BGA, 0.3mm QFP.
PCB Assembly Capabilities
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Quantity |
1 pcs - 1,000,000 pcs |
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Assembly type |
SMT, THT or Hybrid |
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Parts procurement |
Full turnkey (ZhongFeng provide all components) |
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Partial turnkey ( Customer provide the main components and ZhongFeng provide the rest) |
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Kitted (Customer provide all components) |
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Component types |
SMT 01005, 0201, BGA 0.3mm pitch, QFP 0.3mm pitch, etc. |
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Test |
Visual Inspection, AOI, Custom testing, ICT, FCT, Test jig |
PCB Assembly Products Show
PCB SMT Assembly Factory Show
Flex PCB Assembly
Flex PCB Assembly,Flexible PCB Assembly,Quick Flexible PCB Assembly,Flexible PCB Assembly Prototype
ZhongFeng Electronic Technology Co., Limited , http://www.1pcbassembly.com