CN109869644B - Enhanced LED light source - Google Patents

Abstract

The invention relates to an enhanced LED light source, comprising a base layer, a light-reflecting layer is arranged above the base layer, a first medium layer is arranged above the light-reflecting layer, a light-transmitting layer is arranged above the first medium layer, and the light-transmitting layer is A second medium layer is arranged above, a first light-transmitting conductive layer is arranged above the second medium layer, a light-emitting medium layer is arranged above the first light-transmitting conductive layer, and a second light-transmitting conductive layer is arranged above the light-emitting medium layer ; The enhanced LED light source resonates and reflects the light emitted by the LED light source through the resonant cavity, so that all the light can be concentrated to one side of the light source, which improves the utilization rate of light, and the resonant cavity is compared with the existing ones. The ordinary light reflection structure in the technology can be designed to be thinner to achieve the reflection effect of the same distance. In addition, the use of a dielectric layer with adjustable thickness can adjust the phase of the reflected light to weaken or enhance the effect of the light emitted by the LED light source. .

Description

An enhanced LED light source

technical field

The invention belongs to the technical field of LED light sources, and in particular relates to an enhanced LED light source.

Background technique

LED light source (LED refers to Light Emitting Diode) is a light emitting diode light source. The light-emitting principle of LED is different from that of incandescent lamps and gas discharge lamps. The energy conversion efficiency of LED light sources is very high. In theory, it can reach 10% of the energy consumption of incandescent lamps. Compared with fluorescent lamps, LEDs can also achieve 50% energy-saving effect. . Compared with the incandescent lamp with the same brightness, the LED with the luminous efficiency of 75lm/W reduces the power consumption by about 80%, and the energy saving effect is remarkable. LEDs can also be combined with solar cells to save energy and protect the environment. It does not contain toxic and harmful substances (such as mercury), avoids the secondary pollution of mercury overflowing from the rupture of fluorescent lamps, and does not interfere with radiation. The LED light source is not only more environmentally friendly and energy-saving, but also has a wider optical-mechanical color gamut and higher color saturation. More importantly, the service life of the LED lighting light source is as long as 60,000 hours, which can completely solve the short life of the traditional light bulb light source. The problem. In the future, the application of LED light sources will become mainstream. Therefore, how to improve the utilization rate of the light emitted by the LED light source is particularly important.

SUMMARY OF THE INVENTION

In view of the above problems, an object of the present invention is to provide a light source that improves the utilization rate of the light emitted by the LED light source.

To this end, the present invention provides an enhanced LED light source, comprising a base layer, a light-reflecting layer is disposed above the base layer, a first dielectric layer is disposed above the light-reflecting layer, and a first dielectric layer is disposed above the first dielectric layer A light-transmitting layer is provided, a second medium layer is provided above the light-transmitting layer, a first light-transmitting conductive layer is provided above the second medium layer, and a light-emitting conductive layer is provided above the first light-transmitting conductive layer The medium layer is provided with a second light-transmitting conductive layer above the light-emitting medium layer.

The light-transmitting layer is provided with a plurality of light-transmitting slits.

The base layer is made of silica.

The light-reflecting layer and the light-transmitting layer are both made of gold.

The first dielectric layer and the second dielectric layer are both made of silicon dioxide.

The first dielectric layer and the second dielectric layer are both made of polymethyl methacrylate.

The first light-transmitting conductive layer and the second light-transmitting conductive layer are both made of light-transmitting conductive materials.

The first light-transmitting conductive layer and the second light-transmitting conductive layer are both made of graphene.

The first light-transmitting conductive layer and the second light-transmitting conductive layer are both made of metal oxide light-transmitting conductive materials.

The light-emitting medium is made of GaAs or InGaAs.

Beneficial effects of the present invention: The enhanced LED light source provided by the present invention consists of a reflective layer, a first medium layer, and a light-transmitting layer to form a resonant cavity, which resonates and reflects the light emitted by the LED light source, so that all the light It can be concentrated to one side of the light source, which improves the utilization rate of light. Compared with the ordinary light reflection structure in the prior art, the resonant cavity can be designed to be thinner for the same distance. In addition, the thickness can be adjusted. The medium layer can adjust the phase of the reflected light to achieve the effect of weakening or enhancing the light emitted by the LED light source. And using graphene as a transparent conductive layer as an electrode can make the reflected light pass through the electrode, on the other hand, the body can provide more carriers to enhance the luminous efficiency of the light-emitting layer.

The present invention will be further described in detail below with reference to the accompanying drawings.

Description of drawings

FIG. 1 is a schematic structural diagram of an enhanced LED light source.

In the figure: 1. base layer; 2. reflective layer; 3. first medium layer; 4. light-transmitting layer; 5. second medium layer; 6. first light-transmitting conductive layer; 7. luminescent medium layer; 8. The second light-transmitting conductive layer; 9. The light-transmitting slit.

Detailed ways

In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose, the specific embodiments, structural features and effects of the present invention are described in detail below with reference to the accompanying drawings and examples.

Example 1

This embodiment provides an enhanced LED light source as shown in FIG. 1 , including a base layer 1 , the base layer 1 has a supporting function, a reflective layer 2 is arranged above the base layer 1 , and the reflective layer 2 is A first medium layer 3 is arranged above, and a light-transmitting layer 4 is arranged above the first medium layer 3. The light-reflecting layer 2, the first medium layer 3, and the light-transmitting layer 4 form a resonant cavity; the light-transmitting layer 4 A second medium layer 5 is arranged above the second medium layer 5, a first light-transmitting conductive layer 6 is arranged above the second medium layer 5, and a light-emitting medium layer 7 is arranged above the first light-transmitting conductive layer 6. A second light-transmitting conductive layer 8 is arranged above the medium layer 7. The first light-transmitting conductive layer 6 and the second light-transmitting conductive layer 8 can be used as two electrodes. The light-transmitting conductive layer 6 is used as a positive electrode as a negative electrode, and is electrically connected to the positive and negative electrodes of the external power supply, so that a power supply can be loaded on the light-emitting medium layer 7, so that the light-emitting medium layer 7 can emit light, thus forming a light-emitting source; The light emitted by the light source will propagate in all directions at the same time, therefore, the first light-transmitting conductive layer 6 and the second light-transmitting conductive layer 8 are made of materials with relatively high light transmittance; The resonant cavity can resonantly reflect the downwardly propagating light, so that the downwardly propagating light can be reflected at a small distance, thereby performing phase superposition with the upwardly propagating light, and improving the utilization of the light emitted by the light source.

其中，n为第一介质层3的折射率，L为第一介质层3与第二介质层5的厚度之和，λ为光源发出的光的波长，m为整数，一般第一介质层3的厚度范围可在20～60nm之间；透光缝隙9宽度为50～130nm，优先的选择为60nm、65nm、70nm等。Further, the light-transmitting layer 4 is provided with a plurality of light-transmitting slits 9; in this way, the resonant cavity formed by the light-reflecting layer 2, the first dielectric layer 3 and the light-transmitting layer 4 is a Fabry-Perot cavity; the first The thickness of the dielectric layer 3 needs to meet the requirements of resonance in the Fabry-Perot cavity,

Among them, n is the refractive index of the first dielectric layer 3, L is the sum of the thicknesses of the first dielectric layer 3 and the second dielectric layer 5, λ is the wavelength of the light emitted by the light source, m is an integer, generally the first dielectric layer 3 The thickness of the light-transmitting slit 9 can be in the range of 20-60 nm; the width of the light-transmitting slit 9 is 50-130 nm, and the preferred choices are 60 nm, 65 nm, 70 nm, and the like.

Further, the light-reflecting layer 2 and the light-transmitting layer 4 are both made of gold. In order to ensure that light can pass through the light-transmitting layer 4 smoothly, the thickness of the light-transmitting layer 4 is 10-30 nm, and the thickness of the light-transmitting layer 4 is preferred. 10nm; followed by other thicknesses of 15nm, 25nm, and 20nm. The light-transmitting layer 4 not only has the function of reflecting the light of the resonance wavelength, but also the function of transmitting the light of the resonance wavelength. Therefore, both the transmittance and the reflectance should be considered. When selecting the light-transmitting layer 4 , a suitable light-transmitting layer 4 is selected according to the wavelength range of the light to be detected actually.

Further, the main function of the base layer 1 is to support other components arranged thereon. Therefore, the main factor considered for the base layer 1 is firmness, which can be made of silicon dioxide or manganese dioxide.

Further, the main consideration of the first dielectric layer 3 and the second dielectric layer 5 is that the light transmission characteristics are better, so the first dielectric layer 3 and the second dielectric layer are both made of silicon dioxide.

Further, the first light-transmitting conductive layer 6 and the second light-transmitting conductive layer 8 are both made of light-transmitting conductive materials. Therefore, the first light-transmitting conductive layer 6 and the second light-transmitting conductive layer 8 can both be made of graphite. It is made of olefin or the first light-transmitting conductive layer 6 and the second light-transmitting conductive layer 8 are all made of metal oxide light-transmitting conductive materials; the metal oxide light-transmitting conductive materials can be TCO, or other materials, such as FTO, ZAO, etc.

It should be noted that the first light-transmitting conductive layer 6 is preferably made of graphene, and the thickness of graphene is relatively thin, so that the reflected light meets the resonance requirements of the resonant cavity, and the design is simpler.

Further, the light-emitting medium 7 is made of GaAs or InGaAs; the thickness of the light-emitting medium 7 is 50 nm˜80 nm, preferably 60 nm, 65 nm, 70 nm, 75 nm, and the like.

Example 2

An enhanced LED light source includes a base layer 1, the base layer 1 has a supporting function, a reflective layer 2 is arranged above the base layer 1, a first dielectric layer 3 is arranged above the reflective layer 2, and the A light-transmitting layer 4 is arranged above the first medium layer 3, and the light-reflecting layer 2, the first medium layer 3, and the light-transmitting layer 4 form a resonant cavity; a second medium layer 5 is arranged above the light-transmitting layer 4, so the A first light-transmitting conductive layer 6 is arranged above the second medium layer 5 , a light-emitting medium layer 7 is arranged above the first light-transmitting conductive layer 6 , and a second light-transmitting medium layer 7 is arranged above the light-emitting medium layer 7 The conductive layer 8, the first light-transmitting conductive layer 6, and the second light-transmitting conductive layer 8 can be used as two electrodes, which are electrically connected to the positive and negative poles of the external power supply, so that the power supply can be loaded on the light-emitting medium layer 7, so that the light is emitted. The medium layer 7 can emit light, thus forming a light-emitting source; since the light emitted by the light-emitting source will propagate in all directions at the same time, therefore, the first light-transmitting conductive layer 6 and the second light-transmitting conductive layer 8 are selected with relatively high light transmittance. and a resonant cavity is designed under the light-emitting medium layer 7, which can resonantly reflect the downwardly propagating light, so that the downwardly propagating light can be reflected at a smaller distance, so as to be compatible with the upwardly propagating light. Perform phase superposition to improve the utilization of light emitted by the light source

Further, the light-reflecting layer 2 and the light-transmitting layer 4 are both made of gold. In order to ensure that light can pass through the light-transmitting layer 4 smoothly, the thickness of the light-transmitting layer 4 is 10-30 nm, and the thickness of the light-transmitting layer 4 is preferred. 10nm; followed by other thicknesses of 15nm, 25nm, and 20nm. The light-transmitting layer 4 not only has the function of reflecting the light of the resonance wavelength, but also the function of transmitting the light of the resonance wavelength. Therefore, both the transmittance and the reflectance should be considered. When selecting the light-transmitting layer 4 , a suitable light-transmitting layer 4 is selected according to the wavelength range of the light to be detected actually.

Further, the light-transmitting layer 4 is provided with a plurality of light-transmitting slits 9 .

Further, the main function of the base layer 1 is to support other components arranged thereon. Therefore, the main factor considered for the base layer 1 is firmness, which can be made of silicon dioxide or manganese dioxide.

Further, the first light-transmitting conductive layer 6 and the second light-transmitting conductive layer 8 are both made of light-transmitting conductive materials. Therefore, the first light-transmitting conductive layer 6 and the second light-transmitting conductive layer 8 can both be made of graphite. It is made of olefin or the first light-transmitting conductive layer 6 and the second light-transmitting conductive layer 8 are all made of metal oxide light-transmitting conductive materials; the metal oxide light-transmitting conductive materials can be TCO, or other materials, such as FTO, ZAO, etc.

It should be noted that the first light-transmitting conductive layer 6 is preferably made of graphene, and the thickness of graphene is relatively thin, so that the reflected light meets the resonance requirements of the resonant cavity, and the design is simpler.

The light-emitting medium 7 is made of GaAs or InGaAs; the thickness of the light-emitting medium 7 is 50 nm˜80 nm, preferably 60 nm, 65 nm, 70 nm, 75 nm, and the like.

Further, the thickness of the first dielectric layer 3 can be in the range of 20-60 nm; the width of the light-transmitting gap 9 is 50-130 nm, preferably 60 nm, 65 nm, 70 nm, and the like.

Further, the first dielectric layer 3 and the second dielectric layer 5 are both made of polymethyl methacrylate (PMMA). When the temperature changes, the polymethyl methacrylate expands, so that the first dielectric layer 3 , The thickness of the second dielectric layer 5 changes, which causes the phase of the emitted light to change, and the superposition with the upwardly propagating light causes the light emitted by the light source to become brighter or darker as a whole. The thicknesses of the first dielectric layer 3 and the second dielectric layer 5 change with temperature, and can be automatically adjusted according to the light of the LED light source with the temperature change, so that the LED light source can adapt to the temperature of the environment and automatically adjust the brightness of the light. Adaptive adjustment.

当m为整数时，光源发出的光整体变亮，此为增强LED光源状态，当m为

倍的奇数时，光源发出的光整体变暗，此为减弱LED光源状态；其中，n为第一介质层3的折射率，L为第一介质层3与第二介质层5的厚度之和，δT为温度的变化，α聚甲基丙烯酸甲酯的热膨胀系数，λ为光源发出的光的波长。

When m is an integer, the light emitted by the light source becomes brighter as a whole, which is the state of the enhanced LED light source. When m is

When it is an odd number of times, the light emitted by the light source becomes dark as a whole, which is the state of weakening the LED light source; wherein, n is the refractive index of the first dielectric layer 3, and L is the sum of the thicknesses of the first dielectric layer 3 and the second dielectric layer 5 , δT is the change in temperature, α is the thermal expansion coefficient of polymethyl methacrylate, and λ is the wavelength of the light emitted by the light source.

The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be considered that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deductions or substitutions can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims (8)

1. An enhanced LED light source, comprising: the light-transmitting and light-transmitting composite film comprises a substrate layer (1), wherein a light-reflecting layer (2) is arranged above the substrate layer (1), a first medium layer (3) is arranged above the light-reflecting layer (2), a light-transmitting layer (4) is arranged above the first medium layer (3), a second medium layer (5) is arranged above the light-transmitting layer (4), a first light-transmitting conductive layer (6) is arranged above the second medium layer (5), a light-emitting medium layer (7) is arranged above the first light-transmitting conductive layer (6), and a second light-transmitting conductive layer (8) is arranged above the light-emitting medium layer (7);

the first dielectric layer (3) and the second dielectric layer (5) are both made of polymethyl methacrylate, so that the thicknesses of the first dielectric layer (3) and the second dielectric layer (5) change along with the temperature, and the whole light emitted by the light source becomes bright or dark through the first dielectric layer (3) and the second dielectric layer (5); the formula for lightening or darkening the light whole body is

Wherein n is the refractive index of the first dielectric layer (3), L is the sum of the thicknesses of the first dielectric layer (3) and the second dielectric layer (5), T is the change of temperature, alpha is the thermal expansion coefficient of polymethyl methacrylate, and lambda is the wavelength of light emitted by the light source.

2. An enhanced LED light source as recited in claim 1, wherein: and a plurality of light-transmitting gaps (9) are arranged on the light-transmitting layer (4).

3. An enhanced LED light source as recited in claim 1, wherein: the base layer (1) is made of silicon dioxide.

4. An enhanced LED light source as recited in claim 1, wherein: the light reflecting layer (2) and the light transmitting layer (4) are both made of gold.

5. An enhanced LED light source as recited in claim 1, wherein: the first light-transmitting conductive layer (6) and the second light-transmitting conductive layer (8) are both made of light-transmitting conductive materials.

6. An enhanced LED light source as recited in claim 5, wherein: the first light-transmitting conducting layer (6) and the second light-transmitting conducting layer (8) are both made of graphene.

7. An enhanced LED light source as recited in claim 5, wherein: the first light-transmitting conductive layer (6) and the second light-transmitting conductive layer (8) are both made of metal oxide light-transmitting conductive materials.

8. An enhanced LED light source as recited in claim 1, wherein: the luminous medium (7) is made of GaAs or InGaAs.

Images