CN213576863U

CN213576863U - Light-emitting device and bulb

Info

Publication number: CN213576863U
Application number: CN202022548640.XU
Authority: CN
Inventors: 严钱军; 郑昭章; 马玲莉
Original assignee: Anhui Hangke Semiconductor Technology Co ltd
Current assignee: Anhui Hangke Semiconductor Technology Co ltd
Priority date: 2020-11-06
Filing date: 2020-11-06
Publication date: 2021-06-29
Anticipated expiration: 2030-11-06

Abstract

A light emitting device and a bulb comprising a light engine structure, the light engine structure comprising a light source and a first sealed cavity, the light source being disposed within the first sealed cavity, the first sealed cavity being filled with an insulating liquid or gas, the light source within the first sealed cavity being exposed to the insulating liquid or gas; a second sealing cavity is arranged outside the first sealing cavity, and insulating liquid or gas is filled in the second sealing cavity; the utility model provides a sealed light engine who has notes heat dissipation liquid or gas is equipped with the sealed heat radiation structure in the second floor in light engine's outside, and the light source adopts to expose in the naked brilliant structure of heat dissipation liquid or gaseous LED simultaneously, fine solution the heat dissipation problem of LED lamp, simultaneously, adopts the conceptual design of light engine, for the various applications of LED bulb lamp provide the basis, solved the cost of present common bulb lamp, the defect of light efficiency.

Description

Light-emitting device and bulb

Technical Field

The utility model belongs to the technical field of the illumination, concretely relates to LED illuminator and bulb.

Background

Light-Emitting diodes (LEDs) are widely used in the fields of display, general lighting, etc. due to their characteristics of energy saving, environmental protection, long life, small size, etc. The technology of the LED industry is mature, the application is wide, the market demand is large, the traditional high-voltage halogen lamp, the traditional tungsten lamp and even the traditional energy-saving lamp are gradually replaced, and the purpose of really saving energy, reducing emission and greening the earth is achieved. At present, in order to meet the requirements of different application fields, the LED packaging technology is continuously improved, and the light source form of the LED lamp is diversified.

Traditional lamp pearl formula LED lamp, because the luminous characteristics such as pointolite and directionality that have of LED, so traditional incandescent lamp is hardly replaced completely to the LED lamp, accomplishes the illumination of full grading.

In recent years, LED filament lamps have been popular and have a light distribution close to that of incandescent lamps. However, the conventional straight hard filament is influenced by the properties of the filament, the shape of the filament lamp is limited, and the flexible filament can be made into different shapes but has hard damages of low luminous flux and low light efficiency.

The LED is a semiconductor device, and junction temperature of a P-N junction of the LED is increased, so that luminous efficiency is rapidly reduced, and even the P-N junction is burnt; the problem of heat dissipation of such low-voltage high-current power type LED lighting, including LED filament lamps, has remained a long-standing problem to be solved today.

Disclosure of Invention

The utility model discloses the technical problem that will solve is: the sealed light-emitting engine filled with the heat dissipation liquid or gas is provided, the second layer of sealed heat dissipation structure is arranged outside the light-emitting engine, meanwhile, the light source adopts an LED bare crystal structure exposed in the heat dissipation liquid or gas, the heat dissipation problem of an LED lamp is well solved, meanwhile, the conceptual design of the light-emitting engine provides a foundation for various applications of the LED bulb lamp, and the defects of cost and light efficiency of the conventional bulb lamp are overcome.

The utility model discloses a solve above-mentioned technical problem and adopt following technical scheme:

a light emitting device comprising a light engine structure comprising a light source and a first sealed cavity, the light source being disposed within the first sealed cavity, the first sealed cavity being filled with an insulating liquid or gas, the light source within the first sealed cavity being exposed to the insulating liquid or gas; a second sealing cavity is arranged outside the first sealing cavity, and insulating liquid or gas is filled in the second sealing cavity;

the light source comprises a pin, and the pin extends out of the first sealed cavity to the second sealed cavity; the first sealed cavity and the second sealed cavity are light-transmitting sealed cavities.

As one embodiment, the light source includes a plurality of light emitting diodes and a substrate, the light emitting diodes are disposed on the substrate, the light emitting diodes are connected in series or in parallel or in combination, and one end of the pin is connected to the substrate.

As one embodiment, the light source includes a bare die structure exposed to an insulating liquid or gas within the first sealed cavity.

As one implementation mode, the display device further comprises a driving circuit, the driving circuit is arranged on the substrate, one end of the pin is connected with the driving circuit, and the other end of the pin is located in the second sealed cavity.

In one embodiment, the light source is connected with a driving circuit, the driving circuit is disposed in the second sealed cavity, and one end of the pin, which is located in the second sealed cavity, is connected with the driving circuit.

In one embodiment, several of the bare die structures are connected in series or in parallel or in combination to form a chain light source.

In one embodiment, the chain light source is wound around the substrate.

As one embodiment, the chain light source includes one or more strip-shaped substrates, bare crystal structures connected in series or in parallel or in combination are disposed on the strip-shaped substrates, and the chain light source on each strip-shaped substrate is a light source with the same color temperature or a light source with different color temperatures.

In one embodiment, the light source includes a plurality of sets of light sources, and the color temperature of each set of light sources is the same or different.

In one embodiment, the housing of the first sealed cavity is provided with a lens structure, or a part of the housing of the first sealed cavity is the lens structure.

In one embodiment, the inner surface of the shell of the first sealed cavity is partially provided with a light reflecting coating.

In one embodiment, the shell of the first sealed cavity or the shell of the second sealed cavity is provided with phosphor or diffusion powder, or a combination of phosphor and diffusion powder.

In one embodiment, the insulating liquid is a high heat capacity, light transmissive liquid.

In one embodiment, the insulating liquid is a high temperature resistant liquid.

In one embodiment, a heat conducting structure is disposed in the first sealing cavity, and the heat conducting structure is exposed to the insulating liquid or gas.

As one of the implementation modes, the shell of the first sealed cavity is made of silica gel or plastic, and the shell of the second sealed cavity is made of glass.

A bulb comprises the light-emitting device, a core column and a lamp cap, wherein the lamp cap and the core column are connected with a shell of a second sealing cavity, the lamp cap is used for being connected with an external power supply, and the first sealing cavity is fixed on the core column.

As one of the implementation modes, the stem column comprises a horn tube, a horn base, an electric outgoing line and an exhaust pipe, the exhaust pipe is arranged in the horn tube, the horn base is connected to the second sealing cavity in a sealing mode, one end of the electric outgoing line is connected to the lamp holder, and the other end of the electric outgoing line is connected to the pin.

In one embodiment, the driving circuit is installed in the lamp cap.

As one of the implementation modes, the intelligent lamp also comprises an intelligent driving module which is installed in the lamp cap and comprises a controller and a communication module.

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

the utility model discloses get rid of the cover glue in the traditional LED chip structure, design seal chamber as the light source on this basis, replace current filament structure light source. Compared with the existing filament structure light source, the heat dissipation effect is greatly improved, the corresponding power controllable range is larger, and different products with wider light intensity range can be manufactured. Meanwhile, based on the technical scheme, the structure with smaller volume can be realized.

Other benefits are further described in the embodiments section.

Drawings

FIG. 1 is a schematic view of a first capsule configuration;

FIG. 2 is a schematic diagram of a first sealed chamber with a light source driving circuit;

FIG. 3 is a schematic view of the bulb structure of embodiment 2;

FIG. 4 is a schematic view of the bulb according to embodiment 3;

FIG. 5 is a schematic view of the bulb according to embodiment 4;

FIG. 6 is a schematic view of another structure of the bulb according to embodiment 4;

FIG. 7 is a schematic structural view of a bulb with a heat conducting structure according to embodiment 5;

fig. 8 is a schematic view of another bulb configuration with a thermally conductive structure.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings. The utility model discloses in words such as first, second, be for the description the utility model discloses a technical scheme is convenient and set up, and does not have specific limiting action, is general finger, right the technical scheme of the utility model does not constitute limiting action. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Example 1:

a light emitting device, such as fig. 1, comprising a light engine structure, said light engine comprising a light source 100 and a first sealed cavity 200, said light source being disposed within said first sealed cavity, said first sealed cavity being filled with an insulating liquid, said light source within said first sealed cavity being exposed to said insulating liquid; a second sealed cavity 300 is arranged outside the first sealed cavity, and insulating gas is filled in the second sealed cavity;

the light source comprises a pin 101, and the pin extends out of the first sealed cavity to the second sealed cavity;

the first sealed cavity is a semitransparent and light-transmitting sealed cavity, and the second sealed cavity is a fully transparent and light-transmitting sealed cavity. Translucent, translucent material light transmission performance is equivalent with transparent material, but the dazzling defect of light source can be reduced to translucent material, adopts the material of full transparency outside first sealed chamber, can observe inside first sealed chamber structure, has the aesthetic property.

Specifically, the light source includes a plurality of light emitting diodes 102 and a substrate 103, the light emitting diodes are disposed on the substrate, the light emitting diodes are connected in series or in parallel or in combination, and one end of the pin is connected to the substrate.

The light emitting diode is a bare chip structure, and the bare chip structure is exposed in the insulating liquid in the first sealing cavity.

In the traditional scheme, the surface of a bare crystal structure needs to be covered with colloid for the functions of dust prevention and corrosion prevention. According to the technical scheme, the covering colloid on the surface of the traditional light-emitting diode is removed, so that the heat dissipation obstruction is reduced; meanwhile, the bare crystal is protected by a sealing device, and the heat of the bare crystal structure is directly radiated by insulating liquid.

Wherein, the first seal chamber is for placing the light source chamber, and the second seal chamber is for protecting the cavity or secondary heat dissipation chamber.

Referring to fig. 2, in this embodiment, there is a driving circuit 104, the driving circuit is disposed on the substrate in the first sealed cavity, one end of the pin is connected to the driving circuit, and the other end is located in the second sealed cavity.

The driving circuit of the embodiment can enable the first sealed cavity to be directly connected with an external power supply, and in one special implementation mode, the first sealed cavity is used as an independent light source, and a plurality of structures which take the first sealed cavity as the independent light source are connected in series or in parallel through a power line to form various application modes.

In the first sealing cavity, insulating liquid (or inert liquid) is injected to serve as heat dissipation or heat conduction material, and the first sealing cavity needs to have the characteristics of high refractive index, heat conduction, insulation and low viscosity, such as silica gel and silicone oil materials. Further, the insulating liquid is required to have high heat resistance to ensure that deterioration in performance and color does not occur in a heated (lit) state for a long time.

The second sealing cavity is filled with inert gas, preferably helium or a mixture of helium. Therefore, the first sealing cavity is directly exposed in the second sealing cavity, and the helium gas or the mixed gas of the helium gas in the second sealing cavity has a continuous heat dissipation effect on the first sealing cavity.

In this embodiment, the first sealing cavity is made of silica gel or plastic, and has high light transmittance. The second sealing cavity is made of glass. Preferably, the shell of the first sealed cavity is made of a material with excellent thermal conductivity or is designed to be thinner in thickness.

Because first sealed chamber is injected with liquid, the fragile characteristic of glass material is no longer applicable to first sealed chamber, prefers to adopt indefinitible and printing opacity material, because the molecule of liquid is great, adopts silica gel class or plastics class material can not exert an influence to the leakproofness again. The second sealed chamber adopts the glass material, because the glass material non-deformable, and sealing performance is more excellent, is more applicable to the second sealed chamber of filling helium or helium mist.

Based on the above structure of this embodiment, the size of light engine can furthest be reduced as light engine structure to first sealed chamber, is different from present current LED filament structure (the inside light source actual projection area of LED filament lamp can be very big, and is not pleasing to the eye). In this embodiment, the first sealed cavity is used as a light engine and is a light engine with a housing, so that various application modifications can be made to the first sealed cavity. The problem of limitation and cost of various application deformation of the traditional bulb on the bulb shell is solved.

The shell of the first sealing cavity and the shell of the second sealing cavity can be provided with fluorescent powder or diffusion powder; meanwhile, the shell can be transparent or colored. Meanwhile, the shape of the first sealing cavity can be spherical, pentagram-shaped, columnar and the like, and the shape of the second sealing cavity can be adjusted according to actual application requirements.

In the following, the superiority of liquid heat dissipation and application of the LED bare chip structure is further demonstrated by experimental data.

Table 1 shows the current and cold-heat ratio of a bare die gas or liquid in a first sealed cavity structure (without a second sealed cavity) compared with a conventional LED lamp gas or liquid in the case of no current.

In the table, OK indicates that the data index is qualified, NG indicates that the data index is not qualified, and failure indicates that the product is dead.

As can be seen from the above comparison of data,

1. compared with the structure with the cover glue and the gas, the maximum current of the bare crystal structure and the gas can be increased to more than 1.5-2.5 times according to different sizes of chips.

2. Compared with the structure of bare crystal and liquid, the maximum current of the structure of bare crystal and liquid can be increased to more than 1.5-3.0 times according to different sizes of chips.

Example 2:

in this embodiment, as shown in fig. 3, the bulb structure includes the light emitting device of embodiment 1, and further includes a stem 301 and a base 302, where the base and the stem are connected to the shell of the second sealed cavity 300 (i.e., the bulb shell of the bulb), the base is used for connecting an external power source, and the shell of the first sealed cavity is fixed to the stem.

The stem comprises a horn tube, a horn base, an electric outgoing line and an exhaust pipe, the exhaust pipe is arranged in the horn tube, the horn base is connected to the second sealing cavity in a sealing mode, one end of the electric outgoing line is connected to the lamp holder, and the other end of the electric outgoing line is connected with the pins.

In another embodiment, the driving circuit is disposed in the second sealed cavity, and the pin is connected to the driving circuit at one end of the second sealed cavity.

Or, in another embodiment, the lamp holder is provided with a driving circuit, the driving circuit is arranged in the lamp holder, the pin is led out from the first sealed cavity, and the other end of the pin is connected with the driving circuit in the lamp holder.

Further, still include intelligent drive module, it is installed in the lamp holder, intelligent drive module includes controller and communication module. The communication module can adopt a Bluetooth module, a WiFi module, a zigbee module and other wireless communication modules. The remote intelligent control function or the light effect control function and the like are realized.

Example 3:

as shown in fig. 4, several of the bare chip structures are connected in series or in parallel or in combination to form a chain light source 400, which is wound around a main substrate 401, so as to realize a 4 Π light emitting (360 ° omni-directional light emitting) mode, and can shield the main substrate from the chain light source. One specific implementation is as follows:

the chain light source comprises a plurality of strip-shaped substrates, a plurality of connecting circuits are arranged on the strip-shaped substrates, and each connecting circuit is a series or parallel or series and parallel combined bare crystal structure, so that a filament structure is formed. The chain light source on each strip-shaped substrate can be a light source with the same color temperature or a light source with different color temperatures. Each connecting circuit is independently controlled and is used for controlling the lamp filament to emit light with a specific color. In particular, it is understood that the filament structure formed by a strip-shaped substrate may have only one connection line or a plurality of connection lines.

Based on above-mentioned structure, can realize the light control scheme that monochromatic, double-colored, RGB, RGBW, RGBCW or arbitrary colour combination form through intelligent drive module.

The main substrate has two implementation structures, one of which is: the main substrate is provided with a driving circuit, a connecting circuit of the strip substrate is electrically connected with the driving circuit and wound on the main substrate to be fixed, and pins are led out of the main substrate and externally connected to the second sealing cavity.

In another aspect, the main substrate is only used as a fixing support, the driving circuit is disposed outside the first sealing cavity, and the connecting circuit on the strip substrate is connected to the second sealing cavity through the pins.

Each connecting line is provided with a plurality of bare chip structures, and two adjacent bare chip structures are connected with each other through a wire or a conducting strip, so that a series structure or a parallel structure can be formed.

The chain light source is directly exposed to the insulating liquid or the insulating gas in the first sealed cavity.

Example 4:

in another embodiment, a lens is disposed in the housing of the first sealed cavity, and a part of the housing of the first sealed cavity is a lens structure, that is, the lens structure is a part of the housing of the first sealed cavity and is produced by integral molding with other parts of the housing.

As shown in fig. 5, the lens structure is a fresnel lens structure 500, which is located on the divergent surface of the light source and plays a role in condensing light and increasing light efficiency.

In other embodiments, as shown in fig. 6, the lens structure is a convex lens structure.

Further, the inner surface of the shell of the first sealed cavity is provided with a reflective coating 501, and the reflective coating is sprayed by an aluminum evaporation process or other processes. In order to achieve the same effect of the conventional bulb, a larger area of coating needs to be sprayed on the bulb shell of the conventional bulb.

In the embodiment, the first sealed cavity can be designed to be very small and directly used as a light engine, so that the coating area of the first sealed cavity is small, and the material consumption is reduced; according to the data obtained in actual production, the coating area is only about 1/20 times of the coating area of the shell of the traditional bulb.

Similarly, the shell of the first sealed cavity is coated with fluorescent powder or diffusion powder, and the cost is greatly reduced. Of course, the housing of the second sealed cavity can be coated with fluorescent powder or diffusion powder. In conclusion, the combination and application mode of the first sealed cavity and the second sealed cavity can be matched at will, and the structure of the two sealed cavities can be widely applied to different fields.

Example 5:

based on any one of embodiments 1-4, respectively, it is further possible to provide a heat conducting structure in the first sealed cavity, and the heat conducting structure is exposed to the insulating liquid or gas. The shape of the heat conducting structure can be various forms such as column shape, net shape, sheet shape, silk shape and the like, and the heat conducting structure can be fixed in the first sealing cavity to conduct heat conduction flow. The material can be a metal material with high thermal conductivity, a carbon rod, a graphene material and the like.

Based on the above embodiments, it is found in the application that the heat emitted by the light source is circulated more rapidly even during the convection of the insulating liquid or gas. However, due to the different arrangement of the LED chips, a certain temperature difference is generated in the first sealed cavity. A through heat conducting structure is provided on the substrate, by means of which the heat transfer can be accelerated.

Based on the above factors, as shown in fig. 7 and 8, a corresponding heat conducting structure is provided, and fig. 7 is a schematic view of a column or strip-shaped structure 600 which is fixed on the substrate 103 and passes through the substrate to form an effective heat conduction flow to the heat concentration portion.

As shown in fig. 8, a cross-structured heat conducting flow structure is disposed on a substrate, and a pillar a 601 and a pillar b 602 cross through the substrate to form a dotted line portion as shown in fig. 8, which shows a heat circulation pattern 603. Others need to be supplemented:

in other embodiments, the housing of the first sealed cavity may also be made of glass, and the housing of the second sealed cavity may also be made of materials with high light transmittance, such as silica gel and plastic.

In other embodiments, the first sealed cavity may also be filled with an insulating gas, such as helium or a mixture of helium; the second sealed chamber may also be filled with an insulating liquid. And carrying out different application transformations according to different requirements.

The above-mentioned embodiments only represent one embodiment of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. A light emitting device comprising a light engine structure, said light engine structure comprising a light source and a first sealed cavity, said light source being disposed within said first sealed cavity, said first sealed cavity being filled with an insulating liquid or gas, said light source within said first sealed cavity being exposed to said insulating liquid or gas; a second sealing cavity is arranged outside the first sealing cavity, and insulating liquid or gas is filled in the second sealing cavity;

2. The lighting device as claimed in claim 1, wherein the light source comprises a plurality of leds and a substrate, the leds are disposed on the substrate, the leds are connected in series or in parallel or in combination, and one end of the pin is connected to the substrate.

3. The light-emitting device according to claim 2, wherein the light source comprises a bare die structure exposed to the insulating liquid or gas in the first sealed cavity.

4. The light-emitting device according to claim 2, further comprising a driving circuit disposed on the substrate, wherein one end of the pin is connected to the driving circuit, and the other end of the pin is located in the second sealed cavity.

5. The lighting device as claimed in claim 2, wherein the light source is connected to a driving circuit, the driving circuit is disposed in the second sealed cavity, and one end of the pin disposed in the second sealed cavity is connected to the driving circuit.

6. The light-emitting device according to claim 3, wherein a plurality of the bare die structures are connected in series or in parallel or in combination to form a chain light source.

7. The lighting device as claimed in claim 6, wherein the chain light source is wound around the substrate.

8. The lighting device according to claim 6, wherein the chain light source comprises one or more strip-shaped substrates, the strip-shaped substrates are provided with the series or parallel or combined bare chip structures, and the chain light source on each strip-shaped substrate is a light source with the same color temperature or a light source with different color temperatures.

9. The lighting device as claimed in claim 1, wherein the light source comprises a plurality of sets of light sources, and the color temperature of each set of light sources is the same or different.

10. A light-emitting device according to claim 1, wherein the housing of the first sealed chamber is provided with a lens structure, or a part of the housing of the first sealed chamber is a lens structure.

11. A light-emitting device according to claim 1 or 10, wherein the inner surface of the housing of the first sealed chamber is partially provided with a light-reflecting coating.

12. The light-emitting device according to claim 1, wherein the housing of the first sealed cavity or the housing of the second sealed cavity is provided with phosphor or diffusion powder, or a combination of phosphor and diffusion powder.

13. A light-emitting device according to claim 1, wherein said insulating liquid is a high heat capacity, light-transmissive liquid.

14. A light-emitting device according to claim 1 or 13, wherein the insulating liquid is a high-temperature resistant liquid.

15. The lighting device according to claim 1, wherein a heat conducting structure is disposed in the first sealed cavity, and the heat conducting structure is exposed to the insulating liquid or gas.

16. The light-emitting device according to claim 1, wherein the housing of the first sealed cavity is made of silicone or plastic, and the housing of the second sealed cavity is made of glass.

17. A light bulb comprising one or more of the light emitting devices of any one of claims 1-13, further comprising a stem and a base, wherein the base and the stem are connected to the housing of the second sealed cavity, the base is adapted to be connected to an external power source, and the first sealed cavity is fixed to the stem.

18. The lamp of claim 17, wherein the stem comprises a flared tube, a flared base, an electrical lead, and an exhaust tube, the exhaust tube is disposed in the flared tube, the flared base is hermetically connected to the second sealed cavity, and the electrical lead is connected to the lamp cap at one end and the pin at the other end.

19. The bulb as claimed in claim 17, further comprising a driver circuit, the driver circuit being mounted within the base.

20. The light bulb as recited in claim 17, further comprising an intelligent drive module mounted within the light head, the intelligent drive module comprising a controller and a communication module.