CN115681881A - A light guide assembly structure - Google Patents

Abstract

The invention provides a light guide assembly structure which comprises an LED light source, a lens, a light guide optical fiber and an installation body, wherein a light source installation cavity, an optical fiber installation channel, a lens installation cavity and a light outlet are sequentially arranged in the installation body along the length direction of the installation body. The LED light source is embedded in the light source installation cavity, the lens is embedded in the lens installation cavity, the light guide optical fiber is embedded in the optical fiber installation channel, and the inner wall surface of the optical fiber installation channel is made of light-tight materials. One end of the light guide fiber is close to and faces to the wafer of the LED light source, and the other end faces to the lens. The invention guides light by using the light guide fiber at the light-emitting point closest to the LED light source, because the caliber of the light guide fiber is obviously larger than the light-emitting light spot of the LED light source, even if the relative position assembly between the LED light source and the lens has deviation, the light can be covered by the light guide port of the light guide fiber, thereby avoiding the light leakage phenomenon at the periphery of the LED light source, reducing the light loss and improving the light-emitting efficiency of the product.

Description

A light guide assembly structure

technical field

The invention belongs to the technical field of semiconductor packaging, and in particular relates to a light guide assembly structure.

Background technique

In common LED secondary optics, the LED light source is used directly with the lens, that is, the emitted light is emitted according to the designed optical path. This method requires precise positioning of the relative position between the LED light source and the lens. The lens is usually bought back and fastened with the PCB board through the positioning column, and the LED light source is positioned by welding. There is a certain deviation in the optical path model of this combination; moreover, the LED light source itself has peripheral light leakage, which affects the light output efficiency of the product. .

Contents of the invention

The purpose of the present invention is to provide a light guide assembly structure, aiming to solve the problems of relative position positioning deviation between the LED light source and the lens in the LED packaging structure in the prior art, and peripheral light leakage phenomenon in the light output of the LED light source itself.

The present invention is achieved in this way. A light guide assembly structure includes an LED light source, a lens, a light guide fiber, and an installation body. The interior of the installation body is sequentially provided with a light source installation cavity, an optical fiber installation channel, and a lens installation cavity along its length direction. and a light outlet; the LED light source is embedded in the light source installation cavity, the lens is embedded in the lens installation cavity, the light guide fiber is embedded in the optical fiber installation channel, and the optical fiber installation The inner wall of the channel is made of opaque material; one end of the light guiding fiber is close to and facing the chip of the LED light source, and the other end is facing the lens.

Further, the installation body is also provided with a light converging cavity, the light converging cavity is located between the lens installation cavity and the optical fiber installation channel; the inner wall of the light converging cavity is covered with reflective material.

Further, the installation body is made of opaque material as a whole.

Further, the mounting body includes a base and an upper cover that are covered with each other, and the base and the upper cover are engaged with each other through a positioning post and a positioning hole between them.

Further, a protruding positioning column is provided on the top surface of the base, and the positioning hole is provided on the upper cover at a position corresponding to the positioning column.

Compared with the prior art, the present invention has the beneficial effects of:

1. In the light-guiding assembly structure of the present invention, at the light-emitting point closest to the LED light source, the light-guiding fiber is used to guide the light, because the diameter of the light-guiding fiber will be significantly larger than the light-emitting point of the LED light source, even if there is a gap between the LED light source and the lens. There is a certain deviation in the relative position of the assembly, and the light emitted by the light point can still be covered by the light guide port of the light guide fiber, which can avoid light leakage around the LED light source, effectively reduce light loss, and help improve the light output efficiency of the product. In the case of application, the electric power for driving the emission can be saved compared with the conventional practice.

2. When the light-guiding fiber guides the light from the LED light source from the other end, it is then optically coupled through the lens for a second time, so that the spot effect of the light that comes out in this way has a small deviation. It is extremely accurate and effective in point-to-point optical signal processing.

3. The installation body shields the optical path, which can prevent external light pollution and prevent internal light leakage, and also play a role in dust prevention.

4. When assembling the product, the light source installation cavity, optical fiber installation channel, and lens installation cavity installed in the installation body can facilitate the installation alignment of the LED light source, light guide fiber, and lens, and facilitate assembly.

Description of drawings

Fig. 1 is a three-dimensional schematic diagram of a light guide assembly structure provided by an embodiment of the present invention;

Fig. 2 is a schematic longitudinal sectional view of the light guide assembly structure shown in Fig. 1;

Fig. 3 is a schematic diagram of an exploded structure of the light guide assembly structure shown in Fig. 1;

FIG. 4 is a schematic diagram of an exploded structure from another angle of the light guide assembly structure shown in FIG. 1 .

Explanation of reference signs:

1-LED light source, 11-chip, 2-lens, 3-light guide fiber, 4-installation body, 41-base, 411-positioning column, 42-top cover, 421-positioning hole, a-light source installation cavity, b -Optical fiber installation channel, c-ray converging cavity, d-lens mounting cavity, e-light outlet.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", The orientation or positional relationship indicated by "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have specific orientation, construction and operation in a specific orientation, and therefore should not be construed as limiting the invention; the terms "first", "second" and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative Importance; In addition, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be interpreted in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; It can be directly connected, or indirectly connected through an intermediary, and can be internally connected between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

Please refer to Fig. 1 and Fig. 2, which shows a kind of light guide assembly structure provided by this embodiment, including LED light source 1, lens 2, light guide fiber 3 and mounting body 4, and the interior of mounting body 4 is sequentially arranged along its length direction. There are a light source installation cavity a, an optical fiber installation channel b, a light converging cavity c, a lens installation cavity d and a light outlet e.

Wherein, the LED light source 1 is embedded in the light source installation cavity a, the lens 2 is embedded in the lens installation cavity d, the light guide fiber 3 is embedded in the fiber installation channel b, and one end of the light guide fiber 3 is close to and faces the LED light source 1 The other end of the wafer 11 faces the lens 2.

In order to prevent the light from the light-guiding optical fiber 3 from leaking out, the inner wall of the optical fiber installation channel b is made of opaque material. In practical application, the mounting body 4 can be made of opaque material as a whole, and the inner wall of the light converging cavity c is covered with reflective material.

Specifically, referring to FIG. 3 and FIG. 4 , the installation body 4 includes a base 41 and an upper cover 42 that cover each other. The top surface of the base 41 is provided with a protruding positioning post 411 , and the upper cover 42 corresponds to the position of the positioning post 411. A positioning hole 421 is provided, and the base 41 and the upper cover 42 are engaged with each other through the positioning column 411 and the positioning hole 421 between them.

In the light guide assembly structure of this embodiment, the light guide fiber 3 is used to guide the light at the light exit point closest to the LED light source 1, because the diameter of the light guide fiber 3 will be significantly larger than the light exit point of the LED light source 1, even if the LED light source There is a certain deviation in the relative position assembly between 1 and lens 4, and the light emitted by the light point can still be covered by the light guide port of the light guide fiber 3, which can avoid light leakage around the LED light source 1, effectively reduce light loss, and help improve The light extraction efficiency of the product can save the electric power for driving emission compared with the conventional method when the application is satisfied.

When the light-guiding fiber 3 guides the outgoing light of the LED light source 1 from the other end, it is then optically coupled through the lens 4 for secondary optical coupling, so that the deviation of the light spot effect formed by the outgoing light is small. Sensor, extremely accurate and effective in point-to-point light signal processing.

The installation body 4 shields the optical path, which can prevent external light pollution and prevent internal light leakage, and also play a dustproof role.

When the light guide fiber 3 is assembled, the light source installation cavity a, the fiber installation channel b, and the lens installation cavity d arranged in the installation body 4 facilitate the installation and alignment of the LED light source 1, the light guide fiber 3, and the lens 2, which is beneficial to assembly.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (5)

1. A light guide assembly structure, comprising an LED light source and a lens, characterized in that, the light guide assembly structure also includes a light guide optical fiber and an installation body, and the inside of the installation body is sequentially provided with a light source installation cavity, An optical fiber installation channel, a lens installation cavity, and a light outlet; the LED light source is embedded in the light source installation cavity, the lens is embedded in the lens installation cavity, and the light guide fiber is embedded in the optical fiber installation In the channel, the inner wall of the optical fiber installation channel is made of opaque material; one end of the light guiding fiber is close to and facing the chip of the LED light source, and the other end is facing the lens. 2. The light guide assembly structure according to claim 1, characterized in that, a light converging cavity is also provided in the mounting body, and the light converging cavity is located between the lens mounting cavity and the optical fiber mounting channel; The inner wall of the confluence cavity is covered with reflective material. 3 . The light guide assembly structure according to claim 1 , wherein the mounting body is entirely made of light-impermeable materials. 4 . 4. The light guide assembly structure according to any one of claims 1 to 3, wherein the mounting body includes a base and an upper cover that are covered with each other, and the base and the upper cover pass through the gap between the two. The positioning post and the positioning hole are fastened together. 5. The light guide assembly structure according to claim 4, wherein the positioning column protruding from the top surface of the base is provided, and the upper cover is provided with the positioning column corresponding to the position of the positioning column. positioning hole.

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