High-efficiency LED lamp bulb

Abstract

The invention discloses a high-efficiency light emitting diode (LED) lamp bulb. The high-efficiency LED lamp bulb comprises a light transmitting bulb shell, a core column, at least one LED light emitting strip, a driver and an electric connector, wherein the core column is provided with an exhaust tube, an electric lead-out wire and a bracket; the LED light emitting strip is fixed on the core column, and an electrode of the LED light emitting strip is connected with the driver and the electric connector through the electric lead-out wire of the core column so as to connect an external power supply; the light transmitting bulb shell and the core column are hermetically sealed; the bulb shell is filled with gas with high heat conductivity; the LED light emitting strip comprises a transparent substrate strip which is provided with at least one strip of LED chips connected in series for emitting light of the same or different colors and is sealed in a glass tube; the electrode of the LED is led out of the two ends of the glass tube; the lead-out wire and the glass tube are hermetically sealed; the glass tube is filled with the material with high heat conductivity and high light transmittance; the LED chip emits light of 4pi; the inner or outer wall of the glass tube or the inner wall of the light transmitting bulb shell is provided with a light emitting material; and at least one LED light emitting strip is connected to form a one-way direct current DC or two-way alternating current AC to work. The LED lamp bulb of the invention has the advantages that: the LED chip emits light of 4pi, a heavy radiator is not needed, the driver does not need a transformer and the entire lamp has high efficiency, low cost, and is safe and reliable and the like, and is used for lighting.

Description

technical field [0001] The invention relates to an LED light bulb, in particular to a high-efficiency and low-cost LED light bulb with 4π light output from an LED chip sealed in an air-filled vacuum-sealed bulb for lighting. Background technique [0002] In the prior art, bulb-shaped LED lamps that can replace incandescent lamps are mostly composed of multiple LEDs, a metal-based PCB (MPCB), a radiator with a series of heat dissipation fins, a driver including a switching power supply and a constant current device It is composed of its housing, an anti-glare bulb and an electrical connector. At present, the photoelectric parameters of this type of lamp have reached an acceptable level for general household use, but their price is still too high; the high cost is not mainly due to the LED itself, but because of the heavy aluminum alloy radiator and the transformer switching power supply and The driver of the constant current device; this kind of driver with a transformer swi...

AI Technical Summary

Problems solved by technology

But at present, the efficiency of this kind of LED is still relatively low, and it needs to be closely thermally connected with a heat sink that must be exposed to the air, and AC LED has high-voltage alternating current, which is not safe

[0006] In addition, LED is a point light source, and the light of about 100lm is concentrated in about 1mm 2 On the area of ​​, its brightness is as high as tens of millions of nits. If people look directly at it, it will produce strong glare and leave a black shadow in the field of vision, which will seriously affect vision in a short time.

Therefore, for household lamps, anti-glare bulbs or other light-dispersing devices must be added; in order to obtain a good light feeling, the light-diffusing layer of the anti-glare bulb needs to have sufficient thickness, but this also reduces the The transmittance of the bulb is reduced, usually it will lose about 15% of the light

This reduces the luminous efficiency of the whole lamp

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