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In this paper, five Japanese bulbs are analyzed in detail from the aspects of photoelectric parameters, appearance contrast, heat dissipation structure, etc., and compared with other manufacturers, the defects of their products are reviewed, and then their products are improved, and various parameters of the products are improved. To achieve better. By comparision with other suppliers, to find the problem, and improve the products.
1 photoelectric parameter
1 photoelectric parameter
2 appearance comparison <br> appearance and luminous effect characteristics
OSRAM: exquisite packaging, die-casting heat sink, baking finish, the joint between the lamp cap and the heat sink is fire-resistant and high-temperature resistant plastic material, high-strength glass cover, the local hollow shape is similar to the traditional bulb, and the light is uniform and there is no dark area.
OHM: Beautifully packaged, aluminum tube spinning heat sink, anode natural color surface treatment, lamp head and joints are fireproof plastic materials, high light transmission PC cover, flower-shaped heat sink, and partial dark areas in the light.
STE: Beautifully packaged, aluminum radiator, aluminum surface treatment, anode and joint for fireproof and high temperature resistant plastic materials, high light transmission PC cover, flower-shaped heat sink, and dark areas with light.
Verbatim: exquisite packaging, die-casting heat sink, baking finish, the joint between the lamp cap and the heat sink is fireproof plastic material, high light transmission PC cover, smooth shape similar to traditional bulb, uniform illumination and no dark area.
XLEDIA: Beautifully packaged, aluminum radiator, aluminum alloy bright silver surface treatment, lamp head and joints are fireproof plastic materials, high light transmission PC cover, hollow heat sink, the shape is similar to traditional bulbs, uniform light and no dark areas.
3 heat dissipation structure analysis
OSRAM uses three high-power 1W OSRAM 3030LEDs. After the aluminum substrate , the thermal conductive silicone oil is used to tightly connect with the heat sink, and then the aluminum substrate and the heat sink are fastened by screws. The heat dissipation body has a thermal conductivity of 96W/mk for the die casting.
OHM uses 2 high-power 3W 3535LEDs. After the aluminum substrate, the thermal conductive silicone oil is used to tightly connect with the heat sink. Then the rivet is used to fasten the aluminum substrate and the heat-dissipating base. The heat-dissipating body has a thermal conductivity of 226W/mk, but the thermal conductivity is high but the wall The thin and heat-dissipating base is not integrated with the heat sink, and heat transfer has an effect.
STE adopts 10 low-power 0.5W 3014LEDs. After the aluminum substrate, the non-adhesive thermal pad is used. The PCB is connected with the heat sink by screws. The heat sink is aluminum alloy, the thermal conductivity is 201-218W/mk, the heat conduction is high, and the conduction is high. The middle hollow is also filled with glue to increase the heat dissipation.
Verbatim uses 17 low-power 0.3W 5630LEDs. After the aluminum substrate, the thermal conductive silicone oil is used to connect with the heat-dissipating base. The heat-dissipating base is coated with heat-conductive silicone oil. The plastic base plate screws are used to tightly connect the heat-dissipating base PCB and the heat sink. The heat sink is a die-casting part. The thermal conductivity is 96W/mk, and the heat dissipation base and the heat sink are separate parts, and the heat dissipation effect is affected.
XLEDIA adopts 16 high-power 1W 5050LEDs. After the aluminum substrate, the thermal conductive adhesive is tightly connected with the small cylinder of the heat sink. The aluminum substrate is fixed on the plastic base, and the thermal conductivity is poor. Only the small cylindrical heat conduction on the heat sink is used. The thermal conductivity is 201-218W/mk, but its power is high, the conduction area is small, the heat is concentrated, and the heat dissipation effect is poor.
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