CN104300070A - Bendable LED lamp filament and bulb structure thereof - Google Patents

Abstract

The invention discloses a bendable LED filament and a bulb structure thereof. The LED filament includes a transparent glass substrate, an LED chip, a fluorescent powder glue layer, two electrodes arranged on the outer and inner curved surfaces of the transparent glass substrate, electrode lead wires at both ends of the transparent glass substrate, and gold wires; the LED chip includes a plurality of chip units , each chip unit is composed of three blue LED chips and one red LED chip; the blue LED chip and the red LED chip are both flip chips, and the chips are arranged on the electrodes in the order of PN junctions. An LED lamp is composed of a plurality of LED filaments, a bulb shell, a spiral lamp cap, and a heat-dissipating protective gas; the plurality of LED filaments are connected and sealed in the bulb shell in the form of two strings and two parallels. The invention effectively increases the light output angle and improves the light output efficiency by arranging the transparent glass substrate in an arc shape; arranging the blue light chip and the red light chip at intervals effectively improves the color rendering index of the LED filament.

Description

A bendable LED filament and its bulb structure

technical field

The invention relates to the field of LED packaging and lighting thereof, in particular to a bendable LED filament and a bulb structure thereof.

Background technique

With the development of science and technology, LED lights have gradually replaced traditional lighting fixtures. Existing LED lamps generally include LED filaments, LED chips arranged on both sides of the LED bracket, and fluorescent glue that wraps the LED chips. Existing LED lamps generally use blue light chips and phosphors to excite white light, and their color rendering index is low. In addition, the existing LED brackets are generally composed of metal materials such as copper and aluminum injected into PPA. Due to the opacity of the material itself, the light output angle can be at most 180° on the side where the chip is installed, and the PPA material will be used as the Over time, it is prone to aging and yellowing and discoloration, which affects its light extraction efficiency.

Contents of the invention

An object of the present invention is to provide a bendable LED filament to overcome the shortcomings of the prior art, which overcomes the disadvantages of low color rendering index, low light extraction efficiency, and blue light leakage of LED lamps.

The LED filament of the present invention includes a transparent glass substrate, an LED chip, a fluorescent powder adhesive layer, two electrodes arranged on the outer and inner arc surfaces of the transparent glass substrate, electrode lead wires and gold wires at both ends of the transparent glass substrate; the transparent glass substrate The LED chip is arc-shaped; the LED chip includes a plurality of chip units, and each chip unit is composed of three blue LED chips and one red LED chip; the blue LED chip and the red LED chip are flip-chip Chip, the chip is set on the electrodes on the outer and inner curved surfaces of the transparent glass substrate in the order of P-N junction; the electrodes on the outer and inner curved surfaces of the transparent glass substrate are electrically connected to the electrode leads at both ends of the transparent glass substrate through gold wires; the transparent glass substrate, LED The chip is wrapped with a fluorescent powder glue layer by glue filling technology.

The arc length of the transparent glass substrate is 30.0mm-35.0mm, the width is 0.8mm-1.0mm, and the thickness is 0.2-0.4mm;

The material of the fluorescent powder adhesive layer is a mixed material of fluorescent powder and silica gel;

The LED filament of the present invention uses arc-shaped transparent glass as the packaging substrate (that is, a transparent glass substrate), which increases the radiation surface of the spherical bulb light source, thereby increasing its luminous flux and improving the light efficiency. Blue LED chips and red LED chips are used The chip hybrid packaging method effectively increases the color rendering index of the LED filament, and more realistically displays the real attributes of the object under the light.

Another object of the present invention is to provide an LED lamp, which is composed of a plurality of the above-mentioned LED filaments, a bulb, a spiral lamp cap, and a heat-dissipating protection gas; The two are connected and sealed in the bulb, and the bulb is filled with heat dissipation protection gas;

The heat dissipation protection gas is an inert gas such as helium, hydrogen, helium-hydrogen mixed gas, nitrogen or neon.

In the present invention, the main body of the LED filament is formed by arranging the transparent glass substrate in an arc shape; the substrate material adopts a transparent glass substrate, which effectively increases the light output angle and improves the light output efficiency; blue light is arranged on both sides of the substrate The red light chip is spaced between the chips, which effectively improves the color rendering index of the LED filament. The 360°molding glue dispensing method is used. The phosphor powder glue completely wraps the LED filament, effectively avoiding the shortcomings of LED glare and blue light leakage.

Description of drawings

Fig. 1 is the schematic diagram of LED filament of the present invention;

Fig. 2 is a schematic structural view of the LED lamp of the present invention;

Among them, 1-1 is a transparent glass substrate, 1-2 is a blue LED chip, 1-3 is a red LED chip, 1-4 is a fluorescent powder adhesive layer, 1-5 is an electrode, 1-6 is an electrode lead wire, 1 -7 gold wires, 1 for LED filament, 2 for bulb, 3 for spiral lamp cap, 4 for heat dissipation protection gas.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Figure 1, the LED filament 1 of the present invention includes a transparent glass substrate 1-1, an LED chip, a fluorescent powder glue layer 1-4, and two electrodes 1-5 arranged on the outer and inner curved surfaces of the transparent glass substrate 1-1. 1. Electrode leads 1-6 and gold wires 1-7 at both ends of the transparent glass substrate 1-1; the transparent glass substrate 1-1 is arc-shaped; the LED chip includes a plurality of chip units, each The chip unit is composed of three blue LED chips 1-2 and one red LED chip 1-3; the blue LED chips 1-2 and the red LED chips 1-3 are flip chips, and the chips are in the order of P-N junction It is arranged on the electrodes 1-5 on the outer and inner curved surfaces of the transparent glass substrate 1-1; the electrodes 1-5 on the outer and inner curved surfaces of the transparent glass substrate 1-1 pass through the gold wires 1-7 and the two ends of the transparent glass substrate 1-1. The electrode lead wires 1-6 are electrically connected; the transparent glass substrate 1-1, and the LED chip are wrapped with a fluorescent powder glue layer 1-4 by using glue pouring technology.

The arc length of the transparent glass substrate 1-1 is 30.0mm-35.0mm, the width is 0.8mm-1.0mm, and the thickness is 0.2-0.4mm;

The material of the fluorescent powder adhesive layer 1-4 is a mixed material of fluorescent powder and silica gel;

The LED filament 1 of the present invention adopts arc-shaped transparent glass as the packaging substrate (that is, the transparent glass substrate 1-1), which increases the radiation surface of the spherical bulb light source, thereby increasing its luminous flux and improving the light efficiency. The blue LED chip is used The mixed packaging method with the red LED chip effectively increases the color rendering index of the LED filament, and more realistically displays the real attributes of the object under the light.

As shown in Figure 2, an LED lamp is composed of a plurality of the above-mentioned LED filaments 1, a bulb shell 2, a spiral lamp cap 3, and a heat-dissipating protective gas 4; Two strings and two parallels are used to connect and seal in the bulb 2, and the bulb 2 is filled with heat dissipation protection gas 4;

The heat dissipation protection gas 4 is an inert gas such as helium, hydrogen, helium-hydrogen mixed gas, nitrogen or neon.

The above embodiments do not limit the present invention, and the present invention is not limited to the above embodiments, as long as the requirements of the present invention are met, they all belong to the protection scope of the present invention.

Claims (2)

1. bent LED silk and a bulb structure thereof, is characterized in that comprising transparent glass substrate, LED chip, fluorescent material glue-line, two electrode, the electrode outlet line at transparent glass substrate two ends, gold threads be located on the outer intrados of transparent glass substrate; Described transparent glass substrate is arc strip; Described LED chip comprises multiple chip unit, and each chip unit is made up of three blue-light LED chips and a red LED chip; Described blue-light LED chip and red LED chip are flip-chip, and chip is set in sequence on the electrode of the outer intrados of transparent glass substrate by P-N junction; Electrode on the outer intrados of transparent glass substrate is electrically connected by the electrode outlet line of gold thread with transparent glass substrate two ends; Transparent glass substrate, LED chip adopt encapsulating technology parcel fluorescent material glue-line;

The arc length of described transparent glass substrate is 30.0mm ~ 35.0mm, and width is 0.8mm ~ 1.0mm, and thickness is 0.2 ~ 0.4mm.

2. a LED, is characterized in that by multiple LED silk as claimed in claim 1, cell-shell, lamp screw base, heat radiation protection gas composition; Cell-shell is fixedly connected with lamp screw base, and multiple LED silk as claimed in claim 1 adopts two strings two mode also to connect and is sealed in cell-shell, and is filled with heat radiation protection gas in cell-shell;

Described heat radiation protection gas is inert gas.