CN105470369B - Low-power L ED lamp with micro-grid structure and preparation method of graphene film of low-power L ED lamp - Google Patents

Abstract

The present invention discloses a low-power LED lamp with a microgrid structure and a preparation method of a graphene film thereof, comprising a heat dissipation layer, a reflective layer, a driving block, a buffer cavity and an LED lamp bead layer, wherein the heat dissipation layer is in a conical structure, the conical part of the heat dissipation layer is closely attached to the reflective layer, the upper end of the reflective layer is provided with a driving block, the driving block is flush with the top of the heat dissipation layer, the outer side of the reflective layer is provided with a buffer cavity, a graphene film, an LED lamp bead layer and a light guide layer in sequence, and the outer edge of the light guide layer is connected to the outer edge of the driving block. The present invention makes full use of the uniform conductivity of graphene, and the combination of the reflection effect of the diffusion grains and the light guide layer of the fluorescent beads can ensure the maximum lighting brightness with the minimum power.

Description

A low-power LED lamp with micro-grid structure and preparation method of graphene film thereof

technical field

The invention belongs to the technical field of LEDs, and in particular relates to a low-power LED lamp with a microgrid structure and a preparation method for a graphene film thereof.

Background technique

LED (LightingEmittingDiode) lighting is light-emitting diode lighting, which is a semiconductor solid-state light-emitting device. It uses a solid semiconductor chip as a light-emitting material. In the semiconductor, the excess energy is released through the recombination of carriers to cause photon emission, and directly emits red, yellow, blue, and green light. On this basis, using the principle of three primary colors, Adding fluorescent powder can emit light of any color such as red, yellow, blue, green, blue, orange, purple, white, etc. LED lamps are lighting fixtures that use LEDs as light sources.

Among LED lighting fixtures, bottom lights, chandeliers, projection lights and other decorative and reflective LED lighting fixtures can be fully qualified for any occasion, including art galleries, museums and other places with high color requirements. However, for large-scale facilities such as shopping malls and office buildings, although LED lamps for large-scale lighting have been born, their directivity (the light emitted by the LED chip is a straight line and the divergence is not good) is too high, resulting in average design in a large area. The illuminance is very difficult. Tube-type LED lighting fixtures are arranged too densely, the design cost is too high, and the energy-saving effect is lost. Therefore, LED lighting fixtures are fully available for decorative purposes at this stage, and large-area indoor lighting is not yet mature.

As the LED market continues to expand, the use of low-power LEDs has been mostly affirmed. With the increase in usage and the diversification of use effects, the adjustment of light and shade, LED power and lighting have encountered design research. bottleneck, only by breaking the deadlock can there be further methods. Through the comprehensive review of long-term use, the current pursuit of LED lights still has the following points: 1. The power of LEDs is reduced, and the reduction of the overall power can load more lamps; 2. The stage effect of LED lights; 3. The heat dissipation of LED lights Effect.

Contents of the invention

The purpose of the present invention is to provide a low-power LED lamp with a microgrid structure and a method for preparing the graphene film thereof. The combination can guarantee the maximum lighting brightness with the minimum power.

A low-power LED lamp with a micro-grid structure, including a heat dissipation layer, a reflective layer, a drive block, a buffer cavity and an LED lamp bead layer, the heat dissipation layer is in a conical structure, and the conical part of the heat dissipation layer is closely attached to the light reflection layer , the upper end of the reflective layer is provided with a drive block, the drive block is flush with the top of the heat dissipation layer, and the outer side of the reflective layer is sequentially provided with a buffer cavity, a graphene film, an LED lamp bead layer and a light guide layer, and the light guide layer The outer edge of the layer is connected to the outer edge of the driver block.

Fluorescent beads are arranged in the light guide layer, and the fluorescent beads are spherical in shape with a particle diameter not greater than 1mm.

The light guide layer is made of high-transparency acrylic plexiglass, and the thickness of the light guide layer is not more than 5mm.

Diffusion grains are provided on the outer surface of the reflective layer, and the diffusion grains are not larger than 1mm.

The thickness of the graphene film is not greater than 300 microns.

The preparation method of the graphene film of the low-power LED lamp of a kind of micro-grid structure is as follows:

(1) Preparation of graphene oxide sol: grind graphene oxide into a fine powder with a particle size of 1-40 microns, and prepare a suspension with a concentration of 0.5-6 mg/ml with a solvent, and ultrasonically treat it for 10-120 minutes , removing unstable impurities in the suspension to obtain graphene oxide sol;

(2) Preparation of unsupported graphene oxide film: the graphene oxide sol prepared in step (1) is heated to 30-100° C., and after 10-200 minutes, a film is formed on the liquid surface of the sol, and the film is taken out from the liquid surface. and vacuum drying at a temperature of 50-150° C. to obtain an unsupported graphene oxide film.

The solvent is one or more of ethanol, acetone or water.

The method used to remove unstable impurities in the suspension is ion exchange, filtration, free sedimentation or centrifugation.

Compared with the prior art, the present invention has the following beneficial effects: the LED lamp provided by the present invention uses a graphene film as a conductive micro-network film, and the surface is loaded with LED lamp beads, and the composition utilizes the good electrical conductivity and low resistivity of the graphene film, High heat dissipation effect, while supplying power to the LED lamp, the efficiency is uniform; the setting of the reflective layer and the diffusion grain helps to reflect the light of the LED lamp, so as to achieve the effect of making full use of the light source and greatly reducing the power demand; The light guide layer of the beads can fully disperse the light and prevent glare; the heat dissipation layer is arranged inside, which has a good heat dissipation effect and ensures the service life of the circuit material; the manufacturing method of the graphene conductive film provided by the invention is simple and fast, and the effect Well, it is easy to configure and has a wide range of sources of raw materials.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Explanation of reference signs:

1. Heat dissipation layer; 2. Reflective layer; 3. Drive block; 4. Buffer cavity; 5. Light guide layer; 6. Graphene film; 7. LED lamp bead layer; 8. Fluorescent beads; 9. Diffusion grains.

detailed description

The present invention will be further described below in conjunction with embodiment:

Example 1

A low-power LED lamp with a micro-grid structure, comprising a heat dissipation layer 1, a reflective layer 2, a drive block 3, a buffer cavity 4 and an LED lamp bead layer 7, the heat dissipation layer 1 is in a conical structure, and the heat dissipation layer 1 is conical The shaped part is closely attached to a reflective layer 2, the upper end of the reflective layer 2 is provided with a driving block 3, and the driving block 3 is flush with the top of the heat dissipation layer 1, and the outer side of the reflective layer 2 is sequentially provided with a buffer cavity 4 and a graphene film. 6. The LED bead layer 7 and the light guide layer 5 , the outer edge of the light guide layer 5 is connected to the outer edge of the driving block 3 .

Fluorescent beads 8 are arranged in the light guide layer 5, and the fluorescent beads 8 are spherical in shape, and the particle diameter is not greater than 1 mm.

The light guide layer 5 adopts high-transparency acrylic plexiglass, and the thickness of the light guide layer 5 is not more than 5mm.

Diffusion grains 9 are provided on the outer surface of the reflective layer 2, and the diffusion grains 9 are not larger than 1 mm.

The thickness of the graphene film 6 is not greater than 300 microns.

Example 2

The preparation method of the graphene film of the low-power LED lamp of a kind of micro-grid structure is as follows:

(1) Preparation of graphene oxide sol: grind graphene oxide into a fine powder with a particle size of 1-40 microns, and prepare a suspension with a concentration of 0.5-6 mg/ml with a solvent, and ultrasonically treat it for 10-120 minutes , removing unstable impurities in the suspension to obtain graphene oxide sol;

(2) Preparation of unsupported graphene oxide film: the graphene oxide sol prepared in step (1) is heated to 30-100° C., and after 10-200 minutes, a film is formed on the liquid surface of the sol, and the film is taken out from the liquid surface. and vacuum drying at a temperature of 50-150° C. to obtain an unsupported graphene oxide film.

The solvent is one or more of ethanol, acetone or water.

The method used to remove unstable impurities in the suspension is ion exchange, filtration, free sedimentation or centrifugation.

The above description is only an embodiment of the present invention, and does not limit the present invention. All technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims (8)

1. a kind of low-power LED of micro-capacitance sensor structure, it is characterised in that it includes heat dissipating layer (1), reflector layer (2), drive block (3), cushion chamber (4) and LED lamp bead layer (7), the heat dissipating layer (1) are in conical structure, and heat dissipating layer (1) conical section is tight Reflector layer (2) is posted, reflector layer (2) upper end is provided with drive block (3), and the drive block (3) and heat dissipating layer (1) top are neat Flat, the reflector layer (2) has been orderly arranged outside each cushion chamber (4), graphene film (6), LED lamp bead layer (7) and optical waveguide layer (5), Optical waveguide layer (5) outward flange is connected with the outward flange of drive block (3).

A kind of 2. low-power LED of micro-capacitance sensor structure according to claim 1, it is characterised in that the optical waveguide layer (5) Fluorescent bead (8) is inside provided with, the fluorescent bead (8) is spherical in shape, and particle diameter is not more than 1mm.

A kind of 3. low-power LED of micro-capacitance sensor structure according to claim 1, it is characterised in that the optical waveguide layer (5) 5mm is not more than using high acrylic lucite, optical waveguide layer (5) thickness thoroughly.

A kind of 4. low-power LED of micro-capacitance sensor structure according to claim 1, it is characterised in that the reflector layer (2) Outer surface is provided with diffusion crystal grain (9), and the diffusion crystal grain (9) is not more than 1mm.

A kind of 5. low-power LED of micro-capacitance sensor structure according to claim 1, it is characterised in that the graphene film (6) thickness is not more than 300 microns.

A kind of 6. low-power LED of micro-capacitance sensor structure according to claim 1, it is characterised in that the graphene film Preparation method it is as follows：

(1) preparation of graphene oxide colloidal sol：Graphene oxide is ground into particle diameter and is the fine powder of 1-40 microns, and is matched somebody with somebody with solvent The suspension that concentration is 0.5-6mg/ml is made, after being ultrasonically treated 10-120 minutes, removes the unstable impurity in suspension, obtains To graphene oxide colloidal sol；

(2) preparation without support graphene oxide film：Graphene oxide colloidal sol prepared by step (1) is heated to 30-100 DEG C, by 10-200 minutes, film is formed in colloidal sol liquid level, film is taken out from liquid level, and the vacuum at a temperature of 50-150 DEG C Dry, obtain without support graphene oxide film.

7. the low-power LED of a kind of micro-capacitance sensor structure according to claim 6, it is characterised in that the solvent uses The one or more of ethanol, acetone or water.

8. the low-power LED of a kind of micro-capacitance sensor structure according to claim 6, it is characterised in that described remove suspends The mode used in unstable impurity in liquid is ion exchange, filtering, free settling or centrifugation.