Low-end LED bulb and candlelight disassembly report

(1) Nominal parameters and product pictures:

(2) Integrating sphere photoelectric parameter test data:

(3) Disassembly:

The glass cover and the ceramic heat sink are bonded and fixed by gluing; after breaking the glass cover, the light source is as shown below: The light source of the two integrated packages is connected in parallel, and the light source of each integrated package utilizes a small 9*21mil Power blue chip, each source is 6 strings 7 and rated 150mA-18V, the two sources are connected in parallel after 300mA-18V. The light source is soldered to the copper plate by soldering, and the copper plate and the ceramic heat sink are combined and fixed by thermal grease and two screws.

Light source bracket: Imitation lumen bracket with a copper column diameter of 6mm, without a primary lens.

Ceramic shell, power supply sheath and driving power supply: The heat dissipating fin of ceramic gem porcelain radiator is inside the power supply cavity; the fixing light source screw is fixed on the power supply sheath; the isolated driving power supply, output 300mA-18V, good quality, Electrolytic capacitors of Zhaoqing gemstones are used. The power input (portion near the E27 base) is covered with a white heat shrink tubing for insulation.

Part II: Dismantling report of a company's low-end 3.5W candlelight

(1) Nominal parameters and product pictures:

(2) Integrating sphere photoelectric parameter test data:

(3) Dismantling

The glass cover and the ceramic heat sink are bonded and fixed by gluing; after breaking the glass cover, the light source is as shown above: Using an integrated package light source, the light source utilizes a small power blue chip of 9*21 mil, about 60 All the chips are connected in series, the working voltage is 200V -14mA, and the low-cost driving power source with the resistance-capacitance step-down mode is adopted. The light source is soldered on the copper plate by soldering. The copper plate and the ceramic heat sink are combined and fixed by thermal grease and two screws. It is worth noting that: the ceramic heat sink is “tapping” when the mold is opened, and is used to fix the light source. The tapping screw is screwed directly into the ceramic body.

Light source bracket: Imitation lumen bracket with a copper column diameter of 6mm, without a primary lens. E14 The base and the ceramic shell are bonded by transparent soft rubber, and the amount of glue is relatively small.