CN207263952U - A Refractive Backlight Lens - Google Patents

Abstract

The utility model discloses a refractive backlight lens, comprising a circular base, the lower surface of the base is provided with a blind hole extending toward the inside of the base, the inner surface of the blind hole is an incident surface, the upper surface of the base extends upward to form a free-form surface boss with a central position protruding upward to form an arc-shaped convex block, a bending position is formed between the arc-shaped convex block and the surface of the free-form surface boss, the bending position is recessed 1-5 mm toward the inside of the base, the lower surface of the base is provided with a plurality of conical blind holes, the depth of the conical blind holes is less than the depth of the blind holes, and each conical blind hole is arranged around the blind hole, the blind hole is arranged in the central area of the base, and the inner surface of the free-form surface boss is provided with a plurality of spaced curved surface convex blocks, the curved surface convex blocks are arranged on both sides of the arc-shaped convex blocks. The utility model effectively improves the uniformity of light output.

Description

A Refractive Backlight Lens

technical field

The utility model relates to a lens, in particular to a refraction backlight lens mainly used in a direct backlight module.

Background technique

The direct type LCD backlight module composed of LED (light emitting diode) with lens, diffusion plate, and enhancement film has been widely used in LCD TVs and LCD screens because of its energy saving, long service life, convenient assembly and maintenance, low cost, and good color performance. And widely used in panel lighting fixtures. LED direct-lit backlights have surpassed CCFL cold-cathode tubes and LED edge-lit backlights to become the first choice for the above-mentioned products, and the market demand continues to grow. However, with consumers' requirements for thinner and lighter LCD screens and LCD TVs, and TV and screen manufacturers' requirements for cost control of backlight modules (significantly reducing the number of LEDs), the existing LED direct-type backlights are becoming more and more popular. The more difficult it is to meet the requirements of the complete machine manufacturer. The lens used is not sufficiently dispersed and uniform for the refraction of light.

Contents of the invention

The technical problem to be solved by the utility model is to provide a refracting backlight lens, which can emit more uniform light and improve the efficiency of light emission.

In order to solve the above technical problems, the utility model takes the following technical solutions:

A refractive backlight lens, comprising a circular base, the lower surface of the base is provided with a polygonal blind hole extending toward the inside of the base, the inner surface of the blind hole is the incident surface, and the upper surface of the base is upward Extending and forming a free-form surface convex platform with a central position that protrudes upward to form an arc-shaped protrusion. A bending position is formed between the arc-shaped protrusion and the surface of the free-form surface protrusion, and the bending position is recessed toward the interior of the abutment for 1-5 mm, the lower surface of the abutment is provided with several tapered blind holes, the depth of the tapered blind holes is smaller than the depth of the blind holes, and each tapered blind hole is set around the blind hole, and the inner surface of the free-form surface boss is provided with several There are two curved surface protrusions arranged at intervals, and the curved surface protrusions are arranged on both sides of the arc-shaped convex block.

The width of the arc-shaped protrusion is greater than the maximum width of the blind hole.

The blind hole is arranged in the central area of the abutment.

The distance between two adjacent curved surface protrusions is greater than the width of the curved surface protrusions.

The heights of the protrusions on the two adjacent curved surfaces are different.

The lower surface of the abutment is provided with supporting pins.

The utility model uses polygonal blind holes to increase the refraction angle of light, and uses the curved surface protrusion inside the free-form surface boss and the arc-shaped bump in the middle to form multiple refractions, so that the light distribution is more uniform, and the irradiation on the screen is more accurate. Full, strengthen the brightness of the light exposure.

Description of drawings

Accompanying drawing 1 is the three-dimensional structure schematic diagram of the present utility model;

Accompanying drawing 2 is the utility model sectional structure schematic diagram;

Accompanying drawing 3 is the schematic diagram of light emitting effect of the present invention.

Detailed ways

In order to further understand the features, technical means, and specific objectives and functions of the utility model, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. As shown in Figures 1 and 2, the utility model discloses a refracting backlight lens mainly used for liquid crystal display modules, including a circular base 1, and the lower surface of the base 1 is provided with a A polygonal blind hole 3 extending inside, the inner surface of the blind hole 3 is the incident surface, and the upper surface of the base 1 extends upward to form a free-form surface boss 5 that protrudes upward at the center to form an arc-shaped bump 6, arc-shaped A bending position is formed between the protrusion 6 and the surface of the free-form surface boss 5, and the bending position is recessed toward the inside of the abutment by 1-5 mm. The lower surface of the abutment 1 is provided with a number of tapered blind holes 2. The depth of the shaped blind hole is less than the depth of the blind hole, and each tapered blind hole is arranged around the blind hole, and the inner surface of the free-form surface boss 5 is provided with several curved surface protrusions 7 arranged at intervals, and the curved surface protrusion 7 is arranged on the Both sides of the arc-shaped protrusion 6 . The two sides of the arc-shaped protrusion are provided with the same number of curved surface protrusions. The light enters from the blind hole. The blind hole is polygonal, such as pentagon, hexagon or other polygons. There are changes in curvature and surface normal. The incident light will be refracted in the blind hole, and the refracted light will pass through again. The curved surface protrusions in the free-form surface boss are refracted again, and then refracted again from the surface of the free-form surface boss, forming multiple refractions to form a more uniform light spot.

In addition, the width of the arc-shaped protrusion is greater than the maximum width of the blind hole. The blind hole is located in the central area of the abutment. The distance between two adjacent curved surface protrusions is greater than the width of the curved surface protrusions.

Moreover, the heights of the protrusions on the two adjacent curved surfaces are different, forming refraction at different angles.

The lower surface of the abutment 1 is provided with supporting pins 4 for easy assembly.

In the utility model, the light enters from the blind hole, is refracted on the surface of the blind hole, enters the free-form surface boss, and then part of the light is directly refracted by the surface of the free-form boss and then emitted outward. A part of the light hits the arc-shaped protrusion in the boss of the free-form surface and is refracted out. A part of the light hits the curved surface protrusion in the free-form surface boss, firstly refracts on the curved surface protrusion, then strikes the surface of the free-form surface boss, and then refracts again and then shoots outward. As a result, the light is refracted multiple times to obtain a more uniform spot.

It should be noted that the above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Although the utility model has been described in detail with reference to the embodiments, it is still possible for those skilled in the art Modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features, but within the spirit and principles of the present utility model, any modifications, equivalent replacements, improvements, etc., shall be included in the Within the protection scope of the present utility model.

Claims (6)

1. a kind of refraction type backlight lens, including circular base station, it is characterised in that the lower surface of the base station is provided with base Platform extends internally polygon-shaped blind hole, and the inner surface of the blind hole is the plane of incidence, and the upper surface of base station upwardly extends shaping one Center raises up to form the free form surface boss of arc bump, shape between arc convex and the surface of free form surface boss Into there is bending position, which is equipped with some tapered blind holes, the cone towards 1-5 millimeters of base station inner recess, the lower surface of base station The depth of shape blind hole is less than the depth of blind hole, and each tapered blind hole is set around blind hole, the interior table of free form surface boss Face is equipped with several spaced curved protrusions, which is arranged on the both sides of arc bump.

2. refraction type backlight lens according to claim 1, it is characterised in that the width of the arc bump is more than blind hole Maximum width.

3. refraction type backlight lens according to claim 2, it is characterised in that the blind hole is located at the center of base station Domain.

4. refraction type backlight lens according to claim 3, it is characterised in that between two adjacent curved protrusions Spacing distance be more than the curved protrusion width.

5. refraction type backlight lens according to claim 4, it is characterised in that the height of the two neighboring curved protrusion Differ.

6. refraction type backlight lens according to claim 5, it is characterised in that draw equipped with support the lower surface of the base station Foot.