Light source packaging structure with characteristic of improving light extraction rate

Abstract

The utility model discloses a light source packaging structure with a characteristic of improving light extraction rate, which comprises a base and a chip arranged on the base, a spherical lens used for transmitting a light source emitted by the chip is arranged above the chip, the spherical lens is of a regular spherical lens structure, a support used for supporting the spherical lens is arranged on the periphery of the chip, and the spherical lens is arranged on the support. A concave lens structure is defined by the support, the base and the bottom of the lens. The LED packaging lens solves the problem that the light emitting rate is damaged due to light pattern scattering, weakening, deformation and the like caused by the fact that a hemisphere-shaped structure is adopted as the LED packaging lens in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of semiconductor packaging, and in particular to a light source packaging structure with the characteristic of improving light extraction rate. Background Art

[0002] LED (semiconductor light emitting diode) packaging refers to the packaging of light-emitting chips, which is quite different from integrated circuit packaging. LED packaging not only requires protection of the wick, but also requires light transmission. Therefore, LED packaging has special requirements for packaging materials and structures.

[0003] In the prior art, the packaging structure of LED generally includes a base, and a bracket on the base, a chip is arranged at the bottom of the base, and a lens is arranged on the bracket. However, the lens in the LED packaging structure currently on the market adopts a convex glass lens with a "hemispherical" structure. Since the light output of the LED is a 180° light output body, light will be scattered in all directions. When a "hemispherical" glass lens is used, it will cause light reflection, causing the light source to become heat energy absorption when it returns to the inside of the bracket cavity. In addition, since the bottom of the "hemispherical" shape forms a plane, the light source emitted by the chip will also be scattered, deformed, and weakened after hitting the plane.

[0004] In view of this, the technical solution proposes a light source packaging structure with the characteristic of improving the light output rate. It adopts a "whole spherical" lens structure, which can form a curved concave lens in the cup (the space formed by the base, the bottom of the lens and the bracket), and the upper half is a convex lens. In this way, the light output rate can be improved for light with a shorter wavelength, and the light type is normal without deformation, dispersion or weakening, which can improve the photoelectric performance of the product. Utility Model Content

[0005] The technical solution of the utility model aims to solve at least one of the technical problems in the related art to a certain extent. To this end, the main purpose of the utility model is to provide a light source packaging structure with the characteristic of improving light output, aiming to solve the problem of light scattering, weakening and deformation caused by using a "hemispherical" structure as an LED packaging lens in the prior art, which damages the light output rate.

[0006] To achieve the above object, the utility model provides a light source packaging structure with the characteristic of improving light extraction rate, comprising a base, and a chip arranged on the base, a ball lens for transmitting the light source emitted by the chip is arranged above the chip, and the ball lens is a perfect spherical lens structure.

[0007] A bracket for supporting the ball lens is arranged on the periphery of the chip, and the bracket, the base and the bottom of the lens are combined to form a concave lens structure.

[0008] As a further solution of the utility model, the bracket is a funnel-shaped structure that is larger at the top and smaller at the bottom, and the inner side of the top of the bracket is in contact with and limited by the bottom of the ball lens.

[0009] The beneficial effects of the utility model are as follows:

[0010] The light source packaging structure with the characteristic of improving light output rate proposed by the utility model avoids the light reflection problem caused by the use of a hemispherical glass lens by using a spherical structure ball lens, and eliminates the problem of the light source returning to the bracket cavity after reflection and becoming heat energy absorption. After the ball lens is used, a concave lens is formed in conjunction with the bracket and the base, and the top area of ​​the ball lens is a convex lens, so the light output rate of light with a shorter wavelength can be increased by nearly 30%, so that the light type is normal without deformation, dispersion, or weakening, which can improve the photoelectric performance of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the utility model technical solution or the utility model technical solution in the prior art, the drawings required for use in the embodiments or the prior art descriptions will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model technical solution. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0012] Figure 1 It is a schematic diagram of the cross-sectional structure of the ball lens and the base below, the chip, the lead wire and the bracket in the utility model.

[0013] Figure 2 This is a schematic diagram of the top perspective of the product of the utility model.

[0014] Figure 3 A schematic cross-sectional view of an existing packaging structure.

[0015] [Main parts / assembly reference numerals]

[0016] Label name Label name 1 Base 4 Bracket 2 chip 5 Ball lens 3 lead DETAILED DESCRIPTION

[0017] as follows:

[0018] Please refer to the attached Figure 1-3 ,

[0019] The main structure includes a base 1 and a chip 2 arranged on the base 1. A spherical lens 5 is provided above the chip 2 for transmitting light source through the chip 2. The spherical lens 5 is a perfect spherical lens structure. A bracket 4 for supporting the spherical lens 5 is provided on the periphery of the chip 2. The bracket 4, the base 1 and the bottom of the lens are combined to form a concave lens structure.

[0020] Here’s how it works:

[0021] The scheme adopts a "full spherical" lens structure, which can form a curved concave lens inside the cup (the space enclosed by the base 1, the bottom of the lens and the bracket 4), and the upper half is a convex lens. In this way, the light output rate of light with a shorter wavelength can be improved (at least 30%), avoiding the light reflection problem caused by the use of a hemispherical glass lens, and eliminating the problem of the light source returning to the cavity of the bracket 4 after reflection and becoming heat energy absorption.

[0022] A preferred embodiment of the present invention is as follows: the bracket 4 is in a funnel-shaped structure that is larger at the top and smaller at the bottom, and the inner side of the top of the bracket 4 is in contact with and limited by the bottom of the ball lens 5 .

[0023] The funnel-shaped opening structure is used to first ensure that the ball lens 5 cannot fall off, and finally the ball lens 5 is packaged externally (bonded or hot-melted) to form a whole.

[0024] The above are only preferred embodiments of the technical solution of the utility model, and do not limit the patent scope of the technical solution of the utility model. All equivalent structural changes made by using the contents of the technical solution description and drawings of the utility model under the conception of the technical solution of the utility model, or direct / indirect application in other related technical fields are included in the patent protection scope of the technical solution of the utility model.

Claims

1. A light source packaging structure with the characteristic of improving light extraction efficiency, characterized in that: include A base, and a chip arranged on the base, a ball lens for transmitting the light source emitted by the chip is arranged above the chip, and the ball lens is a perfect spherical lens structure, A bracket for supporting the ball lens is arranged on the periphery of the chip, and the bracket, the base and the bottom of the lens are combined to form a concave lens structure.

2. The light source packaging structure with improved light extraction efficiency according to claim 1, characterized in that: The bracket is in a funnel-shaped structure that is larger at the top and smaller at the bottom. The inner side of the top of the bracket is in contact with and limited by the bottom of the ball lens.

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