CN100399591C - Adaptive 360-degree body-emitting white light-emitting diode - Google Patents

Abstract

The invention provides an adaptive 360-degree body-emitting white light-emitting diode, which solves the problem that by changing the position of the 360-degree body-emitting white light-emitting diode on the optical axis, 360-degree body-emitting light can be realized, and a single white light can also be realized. Light-emitting diodes, which produce spotlight beams and diffuse light effects at the same time. It consists of a transparent potting compound (1), a semiconductor light-emitting chip (3), a photoluminescence phosphor (5), a wire (6), an anti-sedimentation transparent potting compound (7), and a light-emitting diode bracket without a reflector cup ( 12) composition, anti-precipitation transparent potting glue (7) is evenly distributed with photoluminescent phosphor powder (5), and coated on the outside of the semiconductor light-emitting chip (3) and the light-emitting diode bracket (12) without reflector cup On the surface: the transparent potting compound (1) is coated on the outer surface of the precipitation-resistant transparent potting compound (7).

Description

Adaptive 360-degree body-emitting white light-emitting diode

technical field

The invention relates to a photoluminescent diode in a photoelectric component, in particular to a self-adaptive 360-degree body-emitting white light emitting diode.

Background technique

I applied for an invention patent on December 3, 2004: the name of the invention "360-degree volume luminescence high-efficiency photoluminescent diode, application number: 200410052487.4, this patent realizes 360-degree volume luminescence of photoluminescent diodes. The light-emitting principle of this invention, Apply voltage to the light-emitting diode support (12), and the current passes through the wire (6), so that the semiconductor light-emitting chip (3) emits light, and the semiconductor light-emitting chip (3) has the characteristics of volume luminescence or similar volume luminescence. And "thin colloid" ( Composed of photoluminescent phosphor (5) and colloid (8)) coated on the outer surface of the transparent encapsulant (1), the light emitted by the semiconductor chip (3) excites the photoluminescent phosphor (5) , according to the law of refraction and reflection of light, the principle of photoluminescence, and the principle of color mixing of light. After color mixing in light space, 360-degree volume luminescence can be realized. (See Figure 1)

Although the patent realizes 360-degree volume luminescence. However, there are still deficiencies. For example, it cannot achieve 360-degree volumetric lighting by changing the position of the light source on the optical axis in the same structure, or achieve the luminous effect of concentrating light and astigmatism at the same time.

Therefore, I combined the application number of the invention patent "light-emitting diode with compound eyes" that I declared on July 15, 2004: 200410028065.3 (see Figure 7, Figure 8), and the most basic feature of this patent is that it can realize the light-emitting diode light beam; its concentrating principle: the light emitted by the LED (4) is converged at two places [one is converged by a convex lens potted and molded by the LED (4); the other is converged by a reflective cup (10) ] to achieve a converging beam. The size of the area illuminated by the converging light beam is determined by the position of the light emitting diode (4) on the optical axis (2). Example: if the light-emitting diode (4) is on the focal point of the convex lens formed by the transparent potting compound (1), then the concentrated light beam obtained is just small, and the illuminated area is also small; (4) At a position smaller than the focal point, the resulting concentrated light beam is large, and the illuminated area is also large.

Contents of the invention

Combining the characteristics of the above two invention patents, I adopted a new structure and invented the "adaptive 360-degree body-emitting white light emitting diode" (see Figure 2). The biggest feature of this invention: by changing the position of the "white light emitting diode with 360-degree body light emission" (9) on the optical axis (2), 360-degree body light emission (see Figure 5) can be realized, and a white light emission can also be realized Diodes, which produce both a spotlight beam and a diffuse light effect (see Figure 4).

(1) Purpose of the invention

The present invention aims to provide a "adaptive 360-degree (volume emission) white light-emitting diode". The present invention can not only realize 360-degree body light emission, but also realize a spotlight beam by changing the position of the light source on the optical axis. The effect of emitting light simultaneously with scattered light. The invention can meet not only space luminous lighting, but also special-purpose lighting, thereby broadening the application field of white light emitting diodes.

(2) The basic principle on which the invention is based

The basic principles on which the present invention is based: 1. The luminescence characteristic of the LED chip itself is volume luminescence or approximate volume luminescence; 2. Based on the principle of photoluminescence; 3. Based on the law of geometrical optics refraction and reflection; 4. Based on the principle of lens convergence; Fifth, based on the color mixing principle of light.

(3) Basic composition of self-adaptive 360-degree (body-emitting) white light-emitting diodes

Based on the above basic principles, the present invention has invented an "adaptive 360-degree (volume emitting) white light emitting diode", which has a basic structure (as shown in Figure 2).

The invention is composed of a light-emitting diode bracket without a reflective cup, a semiconductor light-emitting chip, a wire, a transparent potting glue, a photoluminescent fluorescent powder, and a precipitation-resistant transparent potting glue.

Anti-precipitation transparent encapsulants refer to transparent encapsulants that can make photoluminescent phosphors evenly distributed inside without precipitation.

(4) Realization process of self-adaptive 360-degree (body-emitting) white light-emitting diode (see Figure 2):

There is a semiconductor light-emitting chip on the light-emitting diode bracket without a reflector, and the two are connected through a wire to complete the circuit. Then, anti-precipitation transparent potting glue and photoluminescent phosphor powder are formulated and potted to form a "white light-emitting diode with 360-degree body luminescence" (see Figure 3). Then the "white light-emitting diode with 360-degree body light emission" is potted and molded with a transparent potting glue (see Figure 2). [The position on the optical axis of the "white light-emitting diode with 360-degree body-emitting light" can be determined according to different needs and different lighting requirements (see Figure 4, Figure 5). ]

(5) Light-emitting mechanism of the present invention:

1) Regarding self-adaptation:

That is, in the same structure, it is possible to achieve different lighting effects and meet different lighting requirements by changing the position of the "360-degree body-emitting white light-emitting diode" on the optical axis. (See Figure 4, Figure 5, Figure 6, Figure 8)

2) Regarding 360-degree volumetric lighting (see Figure 2, Figure 3, and Figure 5)

In Figure 3, the anti-precipitation transparent encapsulant is used, which can ensure the uniformity of photoluminescent phosphor distribution in the colloid. Since the semiconductor light-emitting chip itself has the characteristics of volume emission, it can be made into a "360" Body-emitting white light-emitting diodes".

In Figure 2, we move the position of the "360-degree body-emitting white light emitting diode" on the optical axis to make it reach Figure 5 (that is, it is smaller than the focal length of the convex lens formed by the transparent encapsulant). The farther the light source is from the focal length, the convex lens The smaller the convergence, the larger the angle of scattered light; therefore, the better the effect of 360-degree volumetric lighting. (See Figure 2 Package Structure)

3) About the luminescence of concentrated light and scattered light (see Figure 2, Figure 3, Figure 4)

In Figure 2, we also move the position of the "360-degree body-emitting white light emitting diode" on the optical axis to make it reach Figure 4 (that is, equal to the focal length of the convex lens formed by the transparent encapsulant), then a part of the light in the light source After being converged by the convex lens, it is emitted in the form of concentrated light along the direction of the optical axis; while the other part of the light is emitted to the surroundings in the form of scattered light, so as to achieve the luminous effect of both concentrated light and scattered light.

The self-adaptive 360-degree body-emitting white light-emitting diode is suitable for emitting composite light from photoluminescent phosphors excited by purple light and blue light, and the wavelength of the excitation light source is 260nm-480nm.

Description of drawings

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

Fig. 1 is a schematic diagram of an existing 360-degree volume luminous high-efficiency photoluminescent diode;

Fig. 2 is a schematic diagram of the present embodiment;

Fig. 3 is a 360-degree body-emitting white light-emitting diode in this embodiment;

Fig. 4 is a schematic diagram of realizing "concentrating light and scattering light simultaneously" in this embodiment;

Fig. 5 is a schematic diagram of realizing "360-degree volumetric lighting" in this embodiment;

FIG. 6 is a schematic diagram of an application example of this embodiment;

Fig. 7 is a schematic diagram of "compound eye light-emitting diode";

Fig. 8 is a schematic diagram of the combined light source realized by the "fly-eye light-emitting diode".

In the figure: 1. Transparent potting compound; 2. Optical axis; 3. Semiconductor light-emitting chip; 4. Ordinary light-emitting diode; .Colloid; 9. 360-degree body-emitting white light-emitting diode; 10. Reflective bowl; 11. Self-adaptive 360-degree body-emitting white light-emitting diode; 12. LED bracket without reflective cup.

Detailed ways

Referring to Figure 2, this embodiment consists of a transparent potting compound (1), a semiconductor light-emitting chip (3), a photoluminescence phosphor (5), a wire (6), an anti-precipitation transparent potting compound (7), without Reflector cup light-emitting diode support (12) is formed.

First, the semiconductor light-emitting chip (3) is fixed on the light-emitting diode bracket (12) without a reflector cup, and the circuit connection is realized with a wire (6), and then the anti-precipitation transparent potting glue (7) and the photoluminescent phosphor (5) Mix and prepare, stir evenly, and after degassing, make a "white light-emitting diode with 360-degree volumetric light emission" (9). (see Figure 3)

Then "360-degree body-emitting white light-emitting diode (9)" and transparent potting compound (1) are made into "adaptive 360-degree body-emitting white light-emitting diode" (11). The manufacturing process follows the traditional packaging process, but attention should be paid It is the position of the "white light emitting diode with 360-degree volume emission (9)" on the optical axis (2), which determines the luminous effect of the white light emitting diode with self-adaptive 360-degree volume emission. For example: when the "white light emitting diode with 360-degree volume emission When the position on the optical axis of the "light-emitting diode" is equal to the focal length of the convex lens formed by the transparent potting compound (1), the light-emitting effect of the "adaptive 360-degree body-emitting white light-emitting diode" will produce concentrated light and scattered light; ( See Figure 4), if it is less than the focal length, the luminous effect of the adaptive 360-degree volume luminous white light-emitting diode will produce "360-degree volume luminescence" (see Figure 5)

(1) An example of encapsulating "adaptive 360-degree body-emitting white light-emitting diodes".

We use silica gel as the material of the anti-precipitation transparent potting glue (7); use YAG phosphor as the photoluminescent phosphor (5), so that the "YAG phosphor" is evenly distributed in the colloid without precipitation and The "white light-emitting diode with 360-degree volume luminescence (9)" was prepared. In the process of manufacturing the "adaptive 360-degree volume luminescence white light-emitting diode", we used transparent epoxy AB glue as the material of the transparent potting glue (1) , and according to the requirements in the "Specific Implementation Mode", two kinds of luminous effects of "adaptive 360-degree volume luminescence white light-emitting diodes" are respectively obtained, that is, the luminous effects of "concentrating light and scattered light"; the "360-degree volume luminescence" glow effect.

(2) Application example of "adaptive 360-degree body-emitting white light-emitting diode".

The "adaptive 360-degree volume luminescent white light emitting diode" (its luminous effect is "light concentrating and scattered light") that we will make is converged (see Fig. 6) with a reflective bowl (10), and the result is on the optical axis Obtained a beam of concentrated light with long irradiation distance and good light spot, and formed a large area of scattered light around the light spot. The discovery of this phenomenon is very beneficial to broaden the application field of white light emitting diodes. It can be applied to LED flashlights, miner's lamps, and car headlights, etc.

Claims (3)

1. An adaptive 360-degree body-emitting white light-emitting diode, which consists of a transparent potting compound (1), a semiconductor light-emitting chip (3), a photoluminescence phosphor (5), a wire (6), and a precipitation-resistant transparent potting It is composed of sealing glue (7), light-emitting diode bracket (12) without reflector cup; it is characterized in that: Photoluminescent phosphor powder (5) is evenly distributed in the anti-precipitation transparent encapsulant (7); The anti-precipitation transparent potting glue (7) is coated on the outer surface of the semiconductor light-emitting chip (3) and the light-emitting diode bracket (12) without reflector cup; The transparent encapsulant (1) is coated on the outer surface of the precipitation-resistant transparent encapsulant (7). 2. The self-adaptive 360-degree body-emitting white light-emitting diode according to claim 1, further characterized in that: the semiconductor light-emitting chip (3) is suitable for purple light and blue light semiconductor light-emitting chips with light wavelengths of 260nm-480nm. 3. The self-adaptive 360-degree body-emitting white light-emitting diode according to claim 1, further characterized in that it is suitable for using semiconductor light-emitting chips as excitation energy sources to excite composite light formed by photoluminescence phosphors.

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