CN213988070U

CN213988070U - Backlight lens for direct type display module

Info

Publication number: CN213988070U
Application number: CN202023039302.XU
Authority: CN
Inventors: 南基学
Original assignee: Yejia Optical Technology Guangdong Corp
Current assignee: Yejia Optical Technology Guangdong Corp
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-08-17
Anticipated expiration: 2030-12-16

Abstract

The utility model provides a backlight lens for a direct type display module, which comprises a lens body, wherein the bottom of the lens body is provided with a light placing cavity, the top surface of the lens body is a light emergent surface, the inner wall of the light placing cavity is a light incident surface, and a light source is arranged in the light placing cavity; the top of going into the plain noodles is equipped with into optical prism group, goes into optical prism group and includes a plurality of first microprism lens that connect side by side, and the top of going out the plain noodles is equipped with out optical prism group, and the play optical prism group includes a plurality of second microprism lens that connect side by side, and first microprism lens is perpendicular with second microprism lens. The utility model discloses be provided with the prism group structure that can expand the perpendicular stack of light energy to obtain the regular square and positive luminous facula in central area, when a plurality of lens combinations in a poor light are applied to straight following formula display module assembly, because the edge of facula central area is regular straight, the degree of difficulty of concatenation overall arrangement is low, and the high-usage of light energy, the luminance of the facula that finally obtains is sufficient and even.

Description

Backlight lens for direct type display module

Technical Field

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

Background

The display module is a display device obtained by combining a light-emitting structure with a display structure, such as a computer screen, a liquid crystal television and the like. The backlight lens is also called as a diffusion lens and a TV lens, and one backlight lens is usually used corresponding to a single LED chip and can diffuse and homogenize light beams.

Backlight lens is straight following formula display module's important component, and the even facula of luminance can be formed to the light that the light source sent after backlight lens diffusion, can form the luminous effect of face after a plurality of backlight lens and the light source combination, because most display module all is the rectangle structure among the prior art, and the facula that backlight lens cooperation light source formed is circular structure, when the combination uses, the edge that needs the circular facula of overlap just can obtain complete even luminous effect, the low-usage of light energy.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a backlight lens for a direct type display module to solve the problems in the prior art, which can form a regular and square light spot in the central area, and the utilization rate of light energy is high when the lens is combined and applied to the direct type display module.

In order to solve the prior art problem, the utility model discloses a backlight lens for a direct type display module, which comprises a lens body, wherein the bottom of the lens body is provided with a light placing cavity, the top surface of the lens body is a light emitting surface, the inner wall of the light placing cavity is a light incident surface, and a light source is arranged in the light placing cavity;

the top of going into the plain noodles is equipped with into optical prism group, goes into optical prism group and includes a plurality of first microprism lens that connect side by side, and the top of going out the plain noodles is equipped with out optical prism group, and the play optical prism group includes a plurality of second microprism lens that connect side by side, and first microprism lens is perpendicular with second microprism lens.

Further, the bottom surface of the lens body is covered with a reflective layer.

Furthermore, the bottom of the light source is fixed with a base, the bottom of the lens body is fixed with at least two support legs, and the base is limited between the support legs.

Furthermore, the projection area of the light incidence prism group is P, the light emitting area of the light source is Q, and P is more than or equal to 0.8Q and less than or equal to 1.5Q.

Furthermore, the inner wall of the light incident surface is covered with a first frosted structure layer.

Furthermore, a second frosted structure layer arranged on the light-emitting surface is wound around the light-emitting prism group, and the second frosted structure layer is annular.

The utility model has the advantages that: the utility model discloses a lens in a poor light for straight following formula display module assembly is provided with the prism group structure that can expand the perpendicular stack of light energy to obtain the regular square and positive luminous facula of central zone, when straight following formula display module assembly is applied to in a plurality of lens in a poor light combinations, because the edge of facula central zone is regular straight, the degree of difficulty of concatenation overall arrangement is low, and the high-usage of light energy, and the luminance of the facula that finally obtains is sufficient and even.

Drawings

Fig. 1 is a perspective schematic view of the present invention.

Fig. 2 is a schematic perspective view of the present invention.

Fig. 3 is a schematic top view of the present invention.

Fig. 4 is a schematic cross-sectional view taken along a-a' in fig. 3 according to the present invention.

The reference signs are: the prism comprises a lens body 10, a reflecting layer 11, a support leg 12, a light placing cavity 20, a light entering surface 21, a light entering prism group 22, a first micro prism lens 221, a first frosted structure layer 23, a light exiting surface 30, a light exiting prism group 31, a second micro prism lens 311, a second frosted structure layer 32, a light source 40 and a base 41.

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 to 4.

The embodiment of the utility model discloses a backlight lens for straight following formula display module assembly, including plano-convex type lens body 10, the bottom of lens body 10 is equipped with puts light chamber 20, and the top surface of lens body 10 is play plain noodles 30, and play plain noodles 30 is convex type aspheric surface structure, and the inner wall of putting light chamber 20 is into plain noodles 21, and go into plain noodles 21 and be concave type aspheric surface structure, is equipped with light source 40 in putting light chamber 20, and the light emitting area of light source 40 is just upwards;

the light entrance surface 21 is provided with a light entrance prism group 22 at the top center thereof, the light entrance prism group 22 includes a plurality of first microprism lenses 221 connected side by side, the light exit surface 30 is provided with a light exit prism group 31 at the top center thereof, the light exit prism group 31 includes a plurality of second microprism lenses 311 connected side by side, preferably, the first microprism lenses 221 and the second microprism lenses 311 are both triangular prism structures perpendicular to the optical axis of the light source 40, and the first microprism lenses 221 are perpendicular to the second microprism lenses 311.

The utility model discloses the during operation, most light that light source 40 sent is refracted behind income light prism group 22, the reflection forms the accumulation that obtains light energy, and form the luminous effect of expanding the beam to the first little prism lens 221 extending direction of perpendicular to, this part light is refracted once more after arriving the light prism group 31, the accumulation of light energy is realized in the reflection, and form the luminous effect of expanding the beam to the extending direction of perpendicular to the second little prism lens 311, light can form the straight regular and sufficient central facula of luminance in edge after the dual expansion of first little prism lens 221 and the little prism lens 311 of second; other light rays emitted by the light source 40 enter the lens body 10 from the periphery of the light incident surface 21 and finally exit from the periphery of the light exit surface 30, so that the brightness around the central light spot can be effectively supplemented, and the occurrence of a dark seam in combined use is avoided. When a plurality of backlight lenses are combined for use, the splicing effect among light spots is good, the utilization rate of light energy is high, and finally the surface light-emitting effect with uniform brightness can be obtained.

In the present embodiment, the bottom surface of the lens body 10 is covered with the reflective layer 11, preferably, the reflective layer 11 is a silver plating layer or an aluminum plating layer, and the light inside the lens body 10 can be effectively collected through the reflective layer 11, so as to avoid the loss caused by the light exiting from the bottom surface side of the lens body 10.

In this embodiment, the base 41 is fixed to the bottom of the light source 40, the at least two legs 12 are fixed to the bottom of the lens body 10, the base 41 is installed between the legs 12 in a limited manner, the legs 12 can facilitate installation of the backlight lens, and meanwhile, the light source 40 can be effectively reinforced in a limited manner.

In this embodiment, the projection area of the light entrance prism group 22 on the horizontal plane is P, the area of the light emitting surface of the light source 40 is Q, and P is greater than or equal to 0.8Q and less than or equal to 1.5Q, so that the light entrance prism group 22 can adjust most of light emitted by the light source 40, and the utilization rate of light energy can be effectively improved.

In this embodiment, the inner wall of the light incident surface 21 is covered with the first frosted structure layer 23, and the first frosted structure layer 23 is obtained by processing in a chemical etching or mechanical grinding manner, so that the uniformity of the light spot brightness finally obtained by the whole structure can be effectively improved.

In this embodiment, the second frosted structure layer 32 disposed on the light-emitting surface 30 is wound around the light-emitting prism group 31, when the light-emitting prism group 31 is circular, the second frosted structure layer 32 is circular, and when the light-emitting prism group 31 is square, the second frosted structure is square and annular, and the uniformity of the light-emitting brightness can be further improved by the second frosted structure layer 32.

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 utility model provides a backlight lens for straight following formula display module assembly, includes lens body (10), the bottom of lens body (10) is equipped with puts light chamber (20), the top surface of lens body (10) is for going out plain noodles (30), the inner wall of putting light chamber (20) is for going into plain noodles (21), it is equipped with light source (40), its characterized in that to put in light chamber (20):

the top of going into plain noodles (21) is equipped with income light prism group (22), income light prism group (22) include a plurality of little prism lens (221) of connecting side by side, the top of going out light face (30) is equipped with light-emitting prism group (31), light-emitting prism group (31) include a plurality of little prism lens (311) of second of connecting side by side, first little prism lens (221) with the little prism lens (311) of second are perpendicular.

2. The backlight lens for a direct type display module according to claim 1, wherein: the bottom surface of the lens body (10) is covered with a reflecting layer (11).

3. The backlight lens for a direct type display module according to claim 1, wherein: the bottom of the light source (40) is fixed with a base (41), the bottom of the lens body (10) is fixed with at least two support legs (12), and the base (41) is limited between the support legs (12).

4. The backlight lens for a direct type display module according to claim 1, wherein: the projection area of the light prism group (22) is P, the light emitting area of the light source (40) is Q, and P is more than or equal to 0.8Q and less than or equal to 1.5Q.

5. The backlight lens for a direct type display module according to claim 1, wherein: the inner wall of the light incident surface (21) is covered with a first frosted structure layer (23).

6. The backlight lens for a direct type display module according to claim 1, wherein: and a second frosted structure layer (32) arranged on the light-emitting surface (30) is wound around the light-emitting prism group (31), and the second frosted structure layer (32) is annular.