Flexible LED (light-emitting diode) light source filament

Abstract

The invention relates to LED (light-emitting diode) lamps and in particular relates to an LED light source filament. According to a flexible LED light source filament, a P-N junction and sapphire are packaged together to form a single LED wafer; the single LED wafer is fixed on a substrate through a mixture of fluorescent powder and epoxy resin; the design key points are that a fixing hole which can contain the LED wafer and is used for fixing the single LED wafer is formed in the substrate; the fixing hole is a two-section hole with larger top and smaller bottom; the larger hole is a counter bore; the smaller hole is a through hole; the inner diameter of the smaller hole is smaller than the outer diameter of the LED wafer. According to the flexible LED light source filament provided by the invention, the defect that a single face of LED is luminous is overcome, the luminous efficiency is improved, the temperature is reduced, the service life of the LED is prolonged, less heat is generated, the lamp is portable without a radiator, the defect that a lamp is heavy because of the required radiator in a traditional LED terminal lighting product is overcome, the LED light source is soft and can be optionally deformed and cut, and favorable conditions are provided for diversified large-luminous-angle development of terminal light source products.

Description

technical field [0001] The invention relates to LED lamps, in particular to LED light source filaments. Background technique [0002] A light-emitting diode is a solid-state semiconductor device that can convert electrical energy into visible light, and it can directly convert electricity into light. The heart of the LED is a wafer of light-emitting diodes. The entire wafer is encapsulated on a substrate of any structure by a mixture of phosphor powder and epoxy resin. One end is the negative pole, and the other end is connected to the positive pole of the power supply. For general lighting, people need more white light sources. And white light requires the cooperation of blue chip and yellow phosphor to achieve a series of white light that people need. In 1998, LEDs that emit white light were successfully developed. This kind of LED is made by packaging GaN chips and yttrium aluminum garnet (YAG), that is, packaging the P-N junction with sapphire. The power of a single L...

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Problems solved by technology

like figure 1 As shown, the P-N junction 1 and sapphire 2 are packaged together to form a single LED bulb and fixed on the conductive aluminum substrate 4, and the two ends of the P-N junction are electrically connected to the aluminum substrate through the gold wire 3, and the gold wire 3 Passing through the surface of the light-emitting diode, because the aluminum substrate is opaque, the light-emitting diode (P-N junction) can only emit light in one direction, so that the irradiation angle is limited. Generally, it can only illuminate 120°, not exceeding 140°, and its blocked The light in the other direction cannot be emitted, and it is turned into heat. The gold wire 3 blocks and absorbs light from the light-emitting diodes, which also reduces the light efficiency of the light-emitting diodes. Therefore, the current light efficiency of LEDs can only reach about 30%, and the remaining 70% is turned into heat. thermal energy

1000pcs / M 2 The LED is powered on for 10 minutes, according to the traditional packaging structure, the temperature inside the LED crystal reaches above 180 degrees, and the average temperature around the outside of the LED crystal reaches above 80 degrees (temperature calculation method: (LED crystal internal temperature 180 degrees + air temperature 25 degrees) ÷2=102 degrees), and the temperature above 80 degrees will accelerate the light decay of the LED, which has a great impact on its life

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