CN210572833U

CN210572833U - Backlight lens for display module

Info

Publication number: CN210572833U
Application number: CN201921675356.XU
Authority: CN
Inventors: 南基学
Original assignee: Yejia Optical Technology Guangdong Corp
Current assignee: Yejia Optical Technology Guangdong Corp
Priority date: 2019-10-08
Filing date: 2019-10-08
Publication date: 2020-05-19
Anticipated expiration: 2029-10-08

Abstract

The utility model provides a backlight lens for a display module, which comprises a lens body and LED lamp beads, wherein the bottom of the lens body is provided with a light placing cavity, the LED lamp beads are positioned in the light placing cavity, the inner wall of the light placing cavity is a light entering surface, the outer surface of the top of the lens body is a light exiting surface, the light entering surface and the light exiting surface are collinear, the center of the light exiting surface is provided with an arc-shaped recess, and the bottom surface of the lens body is provided with a diffuse reflection layer; the bottom of the lens body is fixed with a lens seat, the bottom of the lens seat is provided with a positioning pin, the light placing cavity penetrates through the lens seat, a limiting ring is arranged in the lens seat and is positioned in the light placing cavity, and the LED lamp beads are fixed in the limiting ring. The utility model discloses luminous homogeneity is good, and the diffuse reflection layer can effectively improve the utilization ratio of light energy, can ensure that luminous luminance is enough big, and the lens holder effectively separates diffuse reflection layer and location foot, and the spacing ring of putting in the light cavity can realize accurate spacing, counterpoint installation convenient operation to LED lamp pearl.

Description

Backlight lens for display module

Technical Field

The utility model relates to a lens in a poor light specifically discloses a lens in a poor light for display module assembly.

Background

Backlight lens is the lens structure who is used for straight following formula backlight unit, sets up LED lamp pearl at backlight lens's income plain noodles, and the light that LED lamp pearl sent is dispersed all around through backlight lens, realizes even grading to satisfy straight following formula backlight unit's grading demand, straight following formula backlight unit generally is used for straight following formula TV set, straight following formula display type electronic product such as display.

The straight following formula backlight unit mainly includes circuit board, LED lamp pearl and lens in a poor light, and LED lamp pearl welding is on the circuit board, and lens in a poor light aims at LED lamp pearl and installs on the circuit board, and during the installation, the optical axis of lens in a poor light need aim at the central point of LED lamp pearl and put, and installation accuracy requires highly, and the installation operation degree of difficulty is big, and in addition, among the prior art, the light that LED lamp pearl sent has the not enough problem of luminance after lens in a poor light diverges.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a backlight lens for a display module, which has good uniformity of light emission, sufficient brightness, and convenient alignment installation.

In order to solve the prior art problem, the utility model discloses a backlight lens for a display module, which comprises a lens body and LED lamp beads, wherein the bottom of the lens body is provided with a light placing cavity, the LED lamp beads are positioned in the light placing cavity, the inner wall of the light placing cavity is a light entering surface, the outer surface of the top of the lens body is a light exiting surface, the light entering surface is collinear with the optical axis of the light exiting surface, the center of the light exiting surface is provided with an arc-shaped recess, and the bottom surface of the lens body is provided with a diffuse reflection;

the bottom of the lens body is fixed with a lens seat, the bottom of the lens seat is provided with a positioning pin, the light placing cavity penetrates through the lens seat, a limiting ring is arranged in the lens seat and is positioned in the light placing cavity, and the LED lamp beads are fixed in the limiting ring.

Furthermore, the light-emitting surface is of an aspheric structure.

Further, the diffuse reflection layer includes a plurality of V-groove units.

Furthermore, the number of the positioning pins is three, and the three positioning pins are uniformly distributed on the bottom surface of the lens seat.

Furthermore, the inner ring section of the limiting ring is in an isosceles trapezoid shape, and the length of the upper bottom in the inner ring section of the limiting ring is smaller than that of the lower bottom.

The utility model has the advantages that: the utility model discloses a lens in a poor light for display module assembly, put the light cavity through the lens body and can effectively disperse the light that comes from LED lamp pearl, luminous homogeneity is good, the diffuse reflection layer can effectively improve the utilization ratio of light energy, can ensure that luminous luminance is enough big, and the lens seat effectively separates diffuse reflection layer and location foot, can effectively ensure the performance on diffuse reflection layer, it can realize accurate spacing to LED lamp pearl to put the spacing ring in the light cavity, counterpoint installation convenient operation.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a structural diagram of another embodiment of the present invention.

The reference signs are: the lens comprises a lens body 10, a light placing cavity 11, a light entering surface 111, a light exiting surface 12, an arc-shaped recess 121, a diffuse reflection layer 13, a V-shaped groove unit 131, an LED lamp bead 20, a lens seat 30, a positioning pin 31 and a limiting ring 32.

Detailed Description

For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.

Refer to fig. 1 and 2.

The embodiment of the utility model discloses a backlight lens for a display module, as shown in fig. 1, including a lens body 10 and an LED lamp bead 20, the lens body 10 is a plano-convex lens structure, a light cavity 11 is arranged at the center of the bottom of the lens body 10, the light cavity 11 is a cone structure with a convex arc top, the LED lamp bead 20 is located in the light cavity 11, the inner wall of the light cavity 11 is a light incident surface 111, the outer surface of the top of the lens body 10 is a light emitting surface 12, the optical axis collineation of the light incident surface 111 and the light emitting surface 12 is provided with an arc recess 121 at the center of the light emitting surface 12, the arc recess 121 is located on the optical axis of the light emitting surface 12, the light emitted by the LED lamp bead 20 irradiates the light incident surface 111, the light passing through the light incident surface 111 is dispersed all around and reaches the light emitting surface 12 through the lens body 10, the light is finally refracted at the light emitting surface 12, the diffuse reflection layer 13 is positioned between the lens body 10 and the lens holder 30, and the diffuse reflection layer 13 can reflect the light rays incident thereon to all directions, so that the light uniformizing effect can be effectively improved, and the overall brightness of the backlight lens can be effectively improved;

the bottom of the lens body 10 is fixed with the lens seat 30, the bottom of the lens seat 30 is provided with the positioning pins 31, the diffuse reflection layer 13 and the positioning pins 31 are separated through the lens seat 30, the positioning pins 31 can be effectively prevented from influencing the normal work of the diffuse reflection layer 13, the bottom of the lens body 10 except the light placement cavity 11 can be ensured to have diffuse reflection effect, meanwhile, the positioning pins 31 can be prevented from influencing the processing of the diffuse reflection layer 13, the light placement cavity 11 also penetrates through the lens seat 30, the lens seat 30 is provided with the limiting ring 32, the limiting ring 32 is positioned in the light placement cavity 11, the outer wall of the limiting ring 32 is coplanar with the inner wall of the light placement cavity 11, the LED lamp beads 20 are fixed in the limiting ring 32, the LED lamp beads 20 can be effectively and conveniently installed in the light placement cavity 11 in a contraposition through the limiting ring 32, and therefore the installation operation of the optical axis of the LED lamp beads 20 and the center axis of the.

In the embodiment, the light emitting surface 12 is an aspheric surface structure, which can refract light rays at different positions to different degrees, so that the refracted light rays in the lens body 10 meet the design requirements.

In the present embodiment, the diffuse reflection layer 13 includes a plurality of uniformly distributed V-groove units 131, the V-groove units 131 are a V-groove structure recessed toward the top of the lens body 10, and a plurality of V-groove units 131 can form a diffuse reflection function, and preferably, all the V-groove units 131 are connected side by side along an array.

In the present embodiment, three positioning pins 31 are provided, and the three positioning pins 31 are uniformly distributed on the bottom surface of the lens holder 30, so that the stability of the lens holder 30 installation can be ensured.

In this embodiment, as shown in fig. 2, the inner ring section of the limiting ring 32 is an isosceles trapezoid, and the length of the upper bottom of the inner ring section of the limiting ring 32 is smaller than the length of the lower bottom, so that the LED lamp bead 20 can be installed in a guiding manner, high-precision alignment can be realized without complex operations, and the LED and the limiting ring 32 can be further conveniently installed.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The backlight lens for the display module comprises a lens body (10) and LED lamp beads (20), and is characterized in that a light placing cavity (11) is formed in the bottom of the lens body (10), the LED lamp beads (20) are located in the light placing cavity (11), the inner wall of the light placing cavity (11) is a light entering surface (111), the outer surface of the top of the lens body (10) is a light exiting surface (12), the light entering surface (111) and the light exiting surface (12) are collinear in optical axis, an arc-shaped recess (121) is formed in the center of the light exiting surface (12), and a diffuse reflection layer (13) is arranged on the bottom surface of the lens body (10);

the LED lens is characterized in that a lens seat (30) is fixed at the bottom of the lens body (10), positioning feet (31) are arranged at the bottom of the lens seat (30), the light placing cavity (11) penetrates through the lens seat (30), a limiting ring (32) is arranged in the lens seat (30), the limiting ring (32) is located in the light placing cavity (11), and the LED lamp beads (20) are fixed in the limiting ring (32).

2. The backlight lens for a display module according to claim 1, wherein the light emitting surface (12) is aspheric.

3. The backlight lens for a display module according to claim 1, wherein the diffuse reflective layer (13) comprises a plurality of V-groove cells (131).

4. The backlight lens for a display module according to claim 1, wherein the number of the positioning pins (31) is three, and the three positioning pins (31) are uniformly distributed on the bottom surface of the lens holder (30).

5. The backlight lens for a display module according to claim 1, wherein the inner ring section of the limiting ring (32) is isosceles trapezoid, and the length of the upper base in the inner ring section of the limiting ring (32) is smaller than the length of the lower base.