CN204756527U

CN204756527U - LED bulb

Info

Publication number: CN204756527U
Application number: CN201520431072.1U
Authority: CN
Inventors: 梁田静; 李儆民; 于浩; 童华南; 陈建昌; 张静
Original assignee: SHAANXI OPTOELECTRONICS TECHNOLOGY Co Ltd
Current assignee: Shaanxi Electronic Information Group Photoelectric Technology Co., Ltd.
Priority date: 2015-06-19
Filing date: 2015-06-19
Publication date: 2015-11-11
Anticipated expiration: 2025-06-19

Abstract

The utility model provides a LED bulb, including setting up the power on the lamp stand to and the lamp pole that links to each other with the power, the LED filament is fixed at the lamp pole both ends, and the glass protective layer covers on the lamp stand, is filled with liquid heat -conducting medium in the glass protective layer. This bulb shell intussuseption topping up attitude heat -conducting medium substitutes the noble gas who packs in traditional LED bulb shell, the junction temperature that makes LED filament chip produce conduct away rapidly through hot conduction method, has solved that the LED bulb heat dissipation is difficult, color rendering index hangs down, the light efficiency hangs down the scheduling problem. The efficiency of in the time of color rendering index and luminance, the facula and the light type that have improved LED effectively make the LED light -emitting even, reduce the luminous power loss, outer quantum is improved reliability with LED has reduced the light decay.

Description

A kind of LED bulb

Technical field

The utility model belongs to technical field of LED illumination, relates to a kind of high performance LED bulb.

Background technology

Incandescent lamp from invention so far, has been passed by more than 100 year with the mankind.And accelerated warmer at global climate, desertification is more and more instantly serious, and along with enhancing that is energy-conservation and environmental consciousness, the incandescent lamp of high energy consumption steps down from the stage of history just gradually.High LED product that is energy-conservation, high-environmental receives warmly pursuing of consumers in general, and country's also wideling popularize again and again, energy-saving and environmental protection consciousness is rooted in the hearts of the people.But consumer is but difficult to forget this part of feelings.In order to cater to the feelings of missing old times or old friends of consumer, the imitative conventional incandescent being made up of filament LED lamp bead is arisen at the historic moment.Simultaneously, the appearance of LED bulb, also the traditional lighting producer declined is allowed again to have shone life, for incandescent lamp producer, only need the connection changing incandescent lamp original support Design LED silk post, the production process of rear end can utilize existing incandescent lamp production technology and production equipment, does not need injured in the sinews or bones.And much encapsulate the demand that producer takes a fancy to traditional lighting producer transition just, also start to open up LED bulb one after another and segment market.

LED bulb is the product of LED and conventional light source perfect adaptation, has revolutionary significance to the development of LED, wide by very of application prospect.But still there is several bottleneck in the development of LED bulb: (1) heat dispersion is bad.LED silk is packaged in by multiple chips on a slice substrate, coated on both sides fluorescent material, because filament substrate area of dissipation is little, radiating effect is poor, is prepared into LED bulb, less by heat radiation mode distribute heat, easily cause accumulation of heat in LED cell-shell, reduce service life.(2) photoelectric properties are poor.Traditional LED lamp silk directly applies fluorescent material glue-line on the blue chip of many series connection, because fluorescent material is near thermal source, for a long time by temperatures involved, can reduce the launching efficiency of fluorescent material, make fluorescent material decay too fast, and then cause the overall attenuation of LED light source very fast.Meanwhile, the white light LEDs colour rendering index that traditional blue chip excites the mode of yellow fluorescent powder to obtain is poor.

Utility model content

The purpose of this utility model is to provide one to have high performance LED bulb, and this bulb solves the problems such as LED silk lamp product heat dispersion is poor, colour rendering index is low, light efficiency is low in prior art.

For achieving the above object, the utility model have employed following technical scheme:

A kind of LED bulb, comprises the power supply arranged on lamp socket, and the lamppost be connected with power supply, and LED silk is fixed on lamppost two ends, and glassivation covers on lamp socket, is filled with liquid heat-conducting medium in glassivation.

Further, described in be fixed on the two-terminal led filament of lamppost and comprise LED silk substrate, and be fixed on several LED chip of LED silk substrate one side or both sides, each LED chip is electrically connected by wire and the electrode being arranged on LED silk substrate two ends.

Further, described LED silk substrate is sapphire or crystalline ceramics.

Further, described LED chip is the blue chip of wavelength at 440-460nm.

Further, described LED chip is coated with three layers of layer of silica gel that silica gel refractive index reduces from the inside to the outside successively.

Further, it be transparent gel resin is layer of silica gel I that described three layers of layer of silica gel are respectively material, excitation wavelength is the layer of silica gel II of the red fluorescence powder of 610-650nm and the mixture of silica gel, and excitation wavelength is the layer of silica gel III of the yellowish green fluorescent powder of 530-560nm and the mixture of silica gel.

Further, described liquid heat-conducting medium is high-temperature heat-conductive silicone oil.

Compared with prior art, the utility model has following beneficial effect:

LED silk point glue adopts multilayer silica gel coating processes, while improve colour rendering index and brightness, effectively improves hot spot and the light type of LED, makes LED uniform in light emission, reduces optical power loss, improves the reliability of external quantum efficiency and LED, reduces light decay.

Filling liquid heat conductive medium in LED cell-shell, substitute the rare gas of filling in traditional LED lamp cell-shell, the junction temperature that LED silk chip is produced is conducted rapidly by heat exchange pattern, solves the problem that LED bulb heat radiation is difficult.

Accompanying drawing explanation

Fig. 1 is the utility model LED bulb side view;

Fig. 2 is LED silk side view;

Fig. 3 is LED silk top view.

In Fig. 1,1.LED filament, 2. liquid heat-conducting medium, 3. glassivation, 4. power supply, 5. lamppost.

In Fig. 2,11.LED filament substrate, 12.LED chip, 13. layer of silica gel I, 14. layer of silica gel II, 15. layer of silica gel III, 17. electrodes.

In Fig. 3,11.LED filament substrate, 12.LED chip, 16. wires, 17. electrodes.

Detailed description of the invention

Below in conjunction with drawings and Examples, the utility model is described in further detail.

As shown in Figure 1, a kind of high performance lED bulb, comprises the power supply 4 arranged on lamp socket, and the lamppost 5 be connected with power supply 4, and LED silk 1 is fixed on lamppost 5 two ends, and glassivation 3 covers on lamp socket, is filled with liquid heat-conducting medium 2 in glassivation 3.

As shown in accompanying drawing 2,3, be fixed on the two-terminal led filament 1 of lamppost 5 and be made up of LED silk substrate 11, LED chip 12, layer of silica gel I 13, layer of silica gel II 14, layer of silica gel III 15, wire 16, electrode 17.

LED silk substrate 11 is fixed with several LED chip 12, described LED chip 12 is fixed on LED silk substrate 11 one side or tow sides, and is the blue chip of wavelength at 440-460nm.The electrical connection between each chip and electrode 17 two ends is realized by wire 16.Described LED silk substrate 11 is sapphire or crystalline ceramics.

LED chip 12 is coated with three layers of layer of silica gel.The silica gel that described layer of silica gel uses all has uv-resistant characteristic, layer of silica gel I 13 is coated in chip surface, layer of silica gel II 14 is coated in layer of silica gel I 13 surface, layer of silica gel III 15 is coated in layer of silica gel II 14 surface, and silica gel refractive index reduces from the inside to the outside successively, the photon loss that effective minimizing refractive index material barrier brings, improve external quantum efficiency, improve hot spot and the light type of LED.

Described layer of silica gel I 13 is transparent gel resin, layer of silica gel II 14 for excitation wavelength be the red fluorescence powder of 610-650nm and the mixture of silica gel, layer of silica gel III 15 for excitation wavelength be the yellowish green fluorescent powder of 530-560nm and the mixture of silica gel.Layer of silica gel II 14, III 15 and LED chip can be kept apart by layer of silica gel I 13, make the thermal source that fluorescent material sends away from LED chip, fluorescent material is not easy for a long time by high temperature, thus ensure that long-life and the specular removal of fluorescent material, realize remote excitation simultaneously, improve excitation intensity.Red fluorescence powder and yellowish green fluorescent powder adopt layered coated mode, and the Energy Efficient that blue chip is sent excites rouge and powder, improve red fluorescence powder launching efficiency, colour rendering index is greatly improved.

Ultraviolet curing method is all adopted during described three layers of layer of silica gel solidification.Make silica gel realize in a short period of time solidifying completely, greatly can shorten hardening time on the one hand, reduce cost of labor, enhance productivity.The precipitation of fluorescent material can be avoided on the other hand, make LED glow color evenly, colour temperature uniformity is better.

Described liquid heat-conducting medium 2 leads warm silicone oil for height.The heat that LED silk chip comes out can be conducted to the external world rapidly by heat exchange pattern by high-temperature heat-conductive silicone oil, tradition of comparing adopts heat radiation mode distribute heat, the method is not easy to cause accumulation of heat in LED cell-shell, improves the service life of LED bulb.

Claims

1. a LED bulb; it is characterized in that: comprise the power supply (4) arranged on lamp socket; and the lamppost (5) to be connected with power supply (4); LED silk (1) is fixed on lamppost (5) two ends; glassivation (3) covers on lamp socket, is filled with liquid heat-conducting medium (2) in glassivation (3).

2. LED bulb as claimed in claim 1, it is characterized in that: described in be fixed on lamppost (5) two-terminal led filament (1) and comprise LED silk substrate (11), and being fixed on several LED chip (12) of LED silk substrate (11) one side or both sides, each LED chip (12) is electrically connected by wire (16) and the electrode (17) being arranged on LED silk substrate (11) two ends.

3. LED bulb as claimed in claim 2, is characterized in that: described LED silk substrate (11) is sapphire or crystalline ceramics.

4. LED bulb as claimed in claim 2, is characterized in that: described LED chip (12) is for wavelength is at the blue chip of 440-460nm.

5. LED bulb as claimed in claim 2, is characterized in that: described LED chip (12) is coated with three layers of layer of silica gel that silica gel refractive index reduces from the inside to the outside successively.

6. LED bulb as claimed in claim 1, is characterized in that: described liquid heat-conducting medium (2) is high-temperature heat-conductive silicone oil.