CN212341505U

CN212341505U - Light guide film for optics

Info

Publication number: CN212341505U
Application number: CN202020926941.9U
Authority: CN
Inventors: 吴纪超; 李英; 王凤荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2021-01-12
Anticipated expiration: 2030-05-28

Abstract

The utility model discloses an optical light guiding film, which comprises a light emitting surface, a bottom surface opposite to the light emitting surface and a light incident surface arranged between the light emitting surface and one side of the bottom surface; a plurality of V-shaped groove structures which are arranged in parallel are arranged on the light emergent surface; the bottom surface is provided with a microstructure area and a dot area; the microstructure area is closer to the light incident surface than the lattice point area; a plurality of rows of first bulges are arranged in the micro-structure area along the extending direction of the V-shaped groove structure; the arrangement direction of the first protruding parts in each row is parallel to the light incident surface; the first convex parts in each row are staggered with the first convex parts in the adjacent rows; a plurality of rows of second bulges are arranged in the dot area along the extending direction of the V-shaped groove structure; the arrangement direction of the second convex parts in each row is parallel to the light incident surface; the second protrusions in each row are staggered from the second protrusions in an adjacent row. The utility model discloses can improve the luminous homogeneity of leaded light membrane, optimize optical effect, effectively improve the user and use experience.

Description

Light guide film for optics

Technical Field

The utility model relates to a backlight unit technical field especially relates to a leaded light membrane is used to optics.

Background

With the advancement of science and technology, portable electronic products such as notebook computers, mobile phones and personal digital terminals have become indispensable information products for people at present. Especially, the appearance of the intelligent terminal drives people to use electronic products, and the intelligent terminal has more and more application functions so that the intelligent terminal can be suitable for more occasions and time. In this case, people are likely to need to use the electronic product at night or without light source. Therefore, the light transmittance of the electronic product without a light source is very important.

The screen internally mounted backlight unit of electronic product, backlight unit is including the light guide plate, and after the light-emitting component in the electronic product was lighted, light penetrated by the side of light guide plate, and the rethread light guide plate lets light penetrate from the front of light guide plate, reaches the illuminating effect. Generally, a plurality of mesh points are processed on the light guide plate, and light rays incident into the light guide plate are reflected, refracted and transmitted by the mesh point array and then emitted out of the light guide plate, so that the light emitting uniformity of the light guide plate can be improved, and the light effect loss is small. However, the uniformity of light emitted from the light guide plate is still insufficient due to the effect of the dots, and therefore, a diffusion sheet or a prism sheet is required to be added, thereby increasing the thickness and the production cost of the backlight module.

SUMMERY OF THE UTILITY MODEL

To the technical problem who exists above-mentioned, the utility model aims at: the light guide film for the optics can improve the light emitting uniformity of the light guide film, optimize the optical effect and effectively improve the use experience of users.

The technical solution of the utility model is realized like this: an optical light guide film comprises a light emitting surface, a bottom surface opposite to the light emitting surface and a light incident surface arranged between the light emitting surface and one side of the bottom surface; a plurality of V-shaped groove structures which are arranged in parallel are arranged on the light emergent surface; the V-shaped groove structure extends from one side of the light incident surface to the other side opposite to the light incident surface; the bottom surface is provided with a microstructure area and a dot area; the microstructure area is closer to the light incident surface than the lattice point area; a plurality of rows of first bulges are arranged in the micro-structure area along the extending direction of the V-shaped groove structure; the arrangement direction of the first protruding parts in each row is parallel to the light incident surface; the first convex parts in each row are staggered with the first convex parts in the adjacent rows; a plurality of rows of second bulges are arranged in the lattice point area along the extending direction of the V-shaped groove structure; the arrangement direction of the second protruding parts in each row is parallel to the light incident surface; the second protrusions in each row are staggered from the second protrusions in an adjacent row.

Further, the first protruding portion and the second protruding portion have the same shape structure.

Furthermore, the first protruding part and the second protruding part both comprise an inclined plane and a side surface which are connected with each other; the inclined lower end of the inclined plane is in smooth transition connection with the bottom surface; the side surface is arranged around the outer contour of the inclined surface, and the bottom of the side surface is connected with the bottom surface.

Further, the projection of the inclined upper end of the inclined plane on the bottom surface is semicircular.

Further, the number of rows of the first convex parts is 5-50.

Furthermore, a light emitting unit is correspondingly arranged on the outer side of the light incident surface.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage:

1. the utility model discloses a leaded light membrane is equipped with V-arrangement groove structure on going out the plain noodles, can play the effect of diffusion piece and prism piece, makes emergent ray's luminance even, has improved the holistic visual effect of backlight unit, need not to add diffusion piece and prism piece again, has reduced the holistic thickness of backlight unit, has also reduced the use of material.

2. The utility model discloses a be equipped with micro-structure district and site district in the bottom surface, first bellying and second bellying are arranged according to size and density degree, and incident light can improve the luminous homogeneity of leaded light membrane through above-mentioned micro-structure district and site district reflection, diffusion propagation back, optimizes the optical effect, effectively improves user and uses experience.

Drawings

The technical scheme of the utility model is further explained by combining the attached drawings as follows:

fig. 1 is a schematic three-dimensional structure of the present invention;

FIG. 2 is a schematic three-dimensional structure of FIG. 1 from another perspective;

FIG. 3 is an enlarged view taken at A in FIG. 2;

FIG. 4 is a schematic top view of the structure of FIG. 2;

FIG. 5 is a schematic front view of the lighting unit of FIG. 2 with the light emitting unit removed;

FIG. 6 is a schematic left side view of the structure of FIG. 2;

wherein: 1. a substrate; 2. a bottom surface; 21. a microstructure region; 22. a dot area; 3. a light-emitting surface; 31. a V-shaped groove structure; 4. a light incident surface; 5. a light emitting unit; 6. a first boss portion; 61. a bevel; 62. a side surface; 7. A second boss.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.

As shown in fig. 1-6, the light guiding film for optics according to the present invention includes a substrate 1, the substrate 1 is a flat plate structure, and the material of the substrate 1 may be polymethyl methacrylate (PMMA) or Polycarbonate (PC). The substrate 1 has a bottom surface 2, a light emitting surface 3 and a light incident surface 4. A light emitting unit 5 is mounted outside the light incident surface 4. The light emitting unit 5 is composed of a plurality of LED light sources.

A plurality of V-shaped grooves 31 are formed on the light-emitting surface 3 in parallel, so that the light-emitting surface 3 forms a continuous triangle (as shown in fig. 1 and 5). The V-shaped groove structure 31 extends from one side of the light incident surface 4 to the other side opposite to the light incident surface 4. The V-shaped groove structure 31 functions as a diffusion sheet and a prism sheet in the related art, so that the brightness of the emergent light is uniform.

To achieve a good optical effect and to obtain a higher processing efficiency. In the specific design, as shown in fig. 5, the depth h of the V-shaped groove structure 31 is 3um to 50 um; the width d of the notch of the V-shaped groove structure 31 is 10um-100 um. The end of the triangular structure formed by the V-shaped groove structure 31 also has a fillet with a radius of 10-200 um. The existence of the fillet can prevent the light-emitting surface 3 from being damaged due to the excessively sharp triangular structure. The V-groove structure 31 is formed by precision die machining.

As shown in fig. 2, a microstructure region 21 and a dot region 22 are sequentially arranged on the bottom surface 2, and the microstructure region 21 is closer to the light incident surface 4 than the dot region 22.

In the microstructure area 21, a plurality of rows of first protrusions 6 are formed along the extending direction of the V-groove structure 31. The arrangement direction of the first protrusions 6 in each row is parallel to the light incident surface 4. The first convex portions 6 in each row are staggered from the first convex portions 6 in the adjacent row. A plurality of rows of second protrusions 7 are processed in the dot region 22 along the extending direction of the V-shaped groove structure 31, and the arrangement direction of the second protrusions 7 in each row is parallel to the light incident surface 4. The second convex portions 7 in each row are staggered from the second convex portions 7 in the adjacent row.

For better optical effect, the first protrusions 6 in the microstructure area 21 and the second protrusions 7 in the dot area 22 have a suitable density arrangement. The number of rows of first projections 6 is 5-50 rows, preferably 15 rows. The spacing S between adjacent rows in microstructure region 21 and the spacing S1 between adjacent rows of dot regions 22 may be equal or unequal, and the numerical range of S and S1 is preferably 1-50 um. In the microstructure region 21, adjacent first protrusions 6 in each row have a spacing D therebetween, in the dot region 22, adjacent second protrusions 7 in each row have a spacing D1 therebetween, D and D1 may be equal or different in value, and D1 preferably have a value in the range of 1 to 50 um. Through the design, the arrangement mode of the first convex parts 6 and the second convex parts 7 can be different in density or the same in density.

Due to the dense arrangement design of the first protruding portions 6 and the second protruding portions 7, incident light rays are reflected, diffused and transmitted by the first protruding portions 6 and the second protruding portions 7 to generate uniform emergent light rays.

Wherein, the first convex part 6 and the second convex part 7 are both formed by a compact die. In order to facilitate the mold production process and reduce the production process cost, the first boss 6 and the second boss 7 preferably have the same outer configuration.

The first boss 6 includes a slope 61 and a side 62 connected to each other. The side surface 62 is located below the inclined surface 61. The inclined lower end of the inclined surface 61 is in smooth transition connection with the bottom surface 2. The side surface 62 is arranged around the outer contour of the inclined surface 61 and the bottom of the side surface 62 is connected to the bottom surface 2. The projection of the inclined upper end of the inclined surface 61 on the bottom surface 2 is semicircular. The longitudinal extension direction of the inclined surface 61 after projection onto the bottom surface 2 coincides with the extension direction of the V-groove structure 31. The range of the width B of the first protrusion 6 (i.e., the width of the inclined surface 61 after being projected onto the bottom surface 2) is 10-100um, the range of the length H of the first protrusion 6 (i.e., the length of the inclined surface 61 after being projected onto the bottom surface 2) is 10-150um, the range of the height C of the first protrusion 6 (i.e., the vertical distance from the highest point of the inclined surface 61 to the bottom surface 2) is 3-100um, and the included angle between the inclined surface 61 of the first protrusion 6 and the bottom surface 2 is 3-75 °, preferably 25 °. The first protrusion 6 and the second protrusion 7 have the same shape and the same arrangement direction, so that the width B1 of the second protrusion 7 ranges from 10um to 120um, the length H1 of the second protrusion 7 ranges from 10um to 120um, the height C1 of the second protrusion 7 ranges from 3um to 100um, and the inclined plane of the second protrusion 7 forms an angle of 3-75 °, preferably 25 °, with the bottom surface 2.

The light incident from the light incident surface 4 is reflected and diffused by the first protrusions 6 in the microstructure region 21 and the second protrusions 7 in the dot region 22 to generate uniform emergent light, and the uniform emergent light passes through the V-groove structure 31 and then exits from the light exiting surface 3. First bellying 6 and second bellying 7 are arranged according to size and density degree, and incident light can improve the luminous homogeneity of leaded light membrane after above-mentioned micro-structure district 21 and site district 22 reflection, refraction propagation, optimizes optical effect, effectively improves user and uses experience. The V-shaped groove structure 31 on the light-emitting surface 3 can play a role of a diffusion sheet and a prism sheet, so that the brightness of the emergent light after passing through is uniform, the integral visual effect of the backlight module is improved, the diffusion sheet and the prism sheet do not need to be added, the integral thickness of the backlight module is reduced, and the use of materials is also reduced.

It should be noted that, the light guide film of the embodiment can be applied to the light guide plate and the light guide film structure in the backlight module at the same time by selecting polymethyl methacrylate (PMMA) or Polycarbonate (PC), and the size covers 2 inches to 110 inches of display devices such as mobile phones, tablet computers, notebooks, navigation devices, liquid crystal displays, and the like.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all utilize the equivalent structure or equivalent flow transformation that the content of the specification does, or directly or indirectly use in other related technical fields, all including in the same way the patent protection scope of the present invention.

Claims

1. An optical light guide film comprises a light emitting surface, a bottom surface opposite to the light emitting surface and a light incident surface arranged between the light emitting surface and one side of the bottom surface; the method is characterized in that: a plurality of V-shaped groove structures which are arranged in parallel are arranged on the light emergent surface; the V-shaped groove structure extends from one side of the light incident surface to the other side opposite to the light incident surface; the bottom surface is provided with a microstructure area and a dot area; the microstructure area is closer to the light incident surface than the lattice point area; a plurality of rows of first bulges are arranged in the micro-structure area along the extending direction of the V-shaped groove structure; the arrangement direction of the first protruding parts in each row is parallel to the light incident surface; the first convex parts in each row are staggered with the first convex parts in the adjacent rows; a plurality of rows of second bulges are arranged in the lattice point area along the extending direction of the V-shaped groove structure; the arrangement direction of the second protruding parts in each row is parallel to the light incident surface; the second protrusions in each row are staggered from the second protrusions in an adjacent row.

2. A light guiding film for optics as claimed in claim 1, wherein: the first protruding portion and the second protruding portion have the same shape structure.

3. A light guiding film for optics as claimed in claim 1, wherein: the first protruding part and the second protruding part respectively comprise an inclined plane and a side surface which are connected with each other; the inclined lower end of the inclined plane is in smooth transition connection with the bottom surface; the side surface is arranged around the outer contour of the inclined surface, and the bottom of the side surface is connected with the bottom surface.

4. A light guide film for optics according to claim 3, wherein: the projection of the inclined upper end of the inclined plane on the bottom surface is semicircular.

5. A light guiding film for optics as claimed in claim 1, wherein: the number of rows of the first convex parts is 5-50.

6. A light guiding film for optics as claimed in claim 1, wherein: and a light emitting unit is correspondingly arranged on the outer side of the light incident surface.