CN209879042U

CN209879042U - Anti-moire prism sheet

Info

Publication number: CN209879042U
Application number: CN201920931156.XU
Authority: CN
Inventors: 吴纪超
Original assignee: Suzhou Longqiao Photoelectric Co Ltd
Current assignee: Suzhou Longqiao Photoelectric Co Ltd
Priority date: 2019-06-18
Filing date: 2019-06-18
Publication date: 2019-12-31
Anticipated expiration: 2029-06-18

Abstract

The utility model discloses an anti-friction schlieren lens, which comprises a transparent base material; the method is characterized in that: the front surface of the transparent base material is provided with a plurality of prism strips which are arranged in parallel; the cross section of the prism strip is of a triangular structure and comprises a bottom surface and two inclined planes; the bottom surface and the inclined surface extend along the length direction of the prism strip; the intersection lines of the two inclined planes and the bottom surface respectively form first edges; the intersection line of the two inclined planes forms a second edge; the first edge is a wavy line which periodically fluctuates on a plane parallel to the bottom surface; the second edge is a wavy line which periodically fluctuates on a plane vertical to the bottom surface; the first edges, close to each other, of the adjacent prism strips are overlapped. The utility model discloses can reduce the phenomenon that the mole line appears on the LCD, improve LCD's display effect.

Description

Anti-moire prism sheet

Technical Field

The utility model relates to a prism piece technical field especially relates to an anti mole line prism piece.

Background

The backlight module of the existing liquid crystal display is mainly composed of a light source, a reflector plate, a light guide plate, a diffusion sheet and a prism sheet, wherein the reflector plate is arranged below the light guide plate and reflects light transmitted by the light guide plate to improve the utilization rate of the light, the diffusion sheet and the prism sheet are arranged on the light guide plate, the diffusion sheet is used for scattering LED light, so that the LED light becomes uniform and shields bad light spots, and the prism sheet focuses the light to increase the brightness of the backlight module. The prism sheet operates on the principle that light rays emitted to the outside of the visual angle of an observer are adjusted to the inside of the visual angle of the observer through refraction and reflection, so that the utilization rate of light energy emitted by a light source is improved.

As shown in fig. 1, the conventional prism sheet has a regular and periodic arrangement of prism strips 2, where the cross section of each prism strip 2 is a triangular prism, and the inclined surface thereof is a light-emitting surface 22. The prism strips 2 are arranged on the transparent base material 1 in parallel, light is regularly distributed in the gathering angle range after being emitted through the prism strips 2, the problem that the display picture of the liquid crystal display is provided with moire fringes (interference fringes) is easily caused, the display effect of the liquid crystal display is influenced, and the viewing experience of a user is reduced.

SUMMERY OF THE UTILITY MODEL

To the technical problem who exists above-mentioned, the utility model aims at: the anti-moire prism lens can reduce the phenomenon of moire fringes on a liquid crystal display and improve the display effect of the liquid crystal display.

The technical solution of the utility model is realized like this: an anti-moire lens comprising a transparent substrate; the front surface of the transparent base material is provided with a plurality of prism strips which are arranged in parallel; the cross section of the prism strip is of a triangular structure and comprises a bottom surface and two inclined planes; the bottom surface and the inclined surface extend along the length direction of the prism strip; the intersection lines of the two inclined planes and the bottom surface respectively form first edges; the intersection line of the two inclined planes forms a second edge; the first edge is a wavy line which periodically fluctuates on a plane parallel to the bottom surface; the second edge is a wavy line which periodically fluctuates on a plane vertical to the bottom surface; the first edges, close to each other, of the adjacent prism strips are overlapped.

Furthermore, the cross section of the prism strip is of an isosceles triangle structure.

Furthermore, the second edge has a height H relative to the bottom surface; h is more than or equal to 3um and less than or equal to 50 um.

Furthermore, the fluctuation amplitude of the first edge and the second edge is 0.5um-5 um.

Further, a vertex angle is formed between the two inclined planes; the top angle is 60-120 degrees.

Furthermore, the distance between the second edges of the adjacent prism strips is 10um-100 um.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage: the utility model discloses a process into the wavy wave form of fluctuation with the first edge of prism strip and second edge, and the wavy undulant direction of first edge and second edge is different, and then two inclined planes of prism strip can form anomalous play plain noodles for the light distribution from two inclined plane outgoing does not have regularity, has effectively reduced the mole line phenomenon of appearing on LCD's the display screen, improves LCD's display effect.

Drawings

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

FIG. 1 is a schematic cross-sectional structure of a prism sheet in the prior art;

FIG. 2 is a schematic structural view of the present invention;

fig. 3 is a schematic front view structure diagram of the present invention;

fig. 4 is a schematic top view structure of the present invention;

fig. 5 is a left side view structural diagram of the present invention;

fig. 6 is a schematic structural diagram of a prism strip according to the present invention;

fig. 7 is a schematic front view structure diagram of the prism strip of the present invention;

fig. 8 is a schematic top view of the prism strip according to the present invention;

wherein: 1. a transparent substrate; 2. a prism strip; 21. a bottom surface; 22. a bevel; 3. a first edge; 4. and a second edge.

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.

Fig. 2-8 show the prism sheet of the present invention, which comprises a transparent substrate 1. The transparent base material 1 is a resin material, and the refractive index thereof is between 1.45 and 1.65. The transparent substrate 1 includes a light-emitting surface on the front surface and a light-incident surface opposite to the light-emitting surface. The front surface of the transparent substrate 1 is provided with a plurality of prism strips 2 which are arranged in parallel, the cross section of each prism strip 2 is of a triangular structure and comprises a bottom surface 21 and two inclined surfaces 22, and the bottom surface is superposed with the front surface of the transparent substrate 1. The bottom surface 21 and the inclined surface 22 extend along the length direction of the prism strip 1, and the intersection lines of the two inclined surfaces 22 and the bottom surface 21 respectively form the first edges 3 of the two prism strips 2. The intersection of the two bevels 22 forms the second edge 4. The first edge 3 is a wavy line which periodically fluctuates on a plane parallel to the bottom surface 21, and the second edge 4 is a wavy line which periodically fluctuates on a plane perpendicular to the bottom surface 2. When viewed from a three-dimensional space, the first edge 3 performs horizontal undulation while extending along the length direction of the prism strip 2, and the second edge 4 performs vertical undulation while extending along the length direction of the prism strip 2. The wave shape formed by the first edge 3 and the second edge 4 can be a sine curve, a cosine curve, a triangular wave curve and the like. The adjacent first edges 21 of adjacent prism strips 2 coincide.

The cross section of the prism strip 2 cut by the plane perpendicular to the length extension direction of the prism strip is of an isosceles triangle structure, specifically, the wave crests of the two first edges 3 of the same prism strip 2 correspond to the wave crests, and the wave troughs correspond to the wave troughs, so that the section corresponding to each point of the prism strip 2 in the length direction is of the isosceles triangle structure.

In order to achieve a good use effect, the present embodiment has the following necessary parameter conditions: the second edge 3 has a height H relative to the base 21. The value of H is preferably 3um to 50 um. The fluctuation period length of the first edge 3 is T1, the fluctuation period length of the second edge 4 is T2, and the length values of T1 and T2 range from 120um to 2500 um. The fluctuation amplitude A of the first edge and the second edge is 0.5um-5um (the amplitude is the absolute value of the maximum displacement away from the balance position during vibration). A vertex angle is formed between the two inclined surfaces 22, and the angle alpha of the vertex angle D is 60-120 degrees. In addition, in order to prolong the service life and prevent the damage caused by the excessively sharp apex angle, transition circular arcs are processed on the apex angle, and the radius of the transition circular arcs is between 0 and 20 um. The distance P between the second edges 4 of the adjacent prism strips 2 is 10um-100 um.

The light that the light source sent enters into prism strip 2 from the back of transparent substrate 1 to become emergent light through the inclined plane 22 of prism strip 2, on the one hand light is through the regulation of prism strip 2, makes light can focus to the user with the most appropriate angle, improves the utilization ratio of light. On the other hand, the first edge 3 and the second edge 4 of the prism strip 2 are processed into wavy shapes, the wavy directions of the first edge 3 and the second edge 4 are different, and the inclined plane 22 between the first edge 3 and the second edge 4 can form a wavy irregular light emitting surface, so that the light emitted from the two inclined planes 22 is not regularly distributed, the phenomenon of moire on a display picture of the liquid crystal display is effectively reduced, and the display effect of the liquid crystal display is improved.

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 anti-moire lens comprising a transparent substrate; the method is characterized in that: the front surface of the transparent base material is provided with a plurality of prism strips which are arranged in parallel; the cross section of the prism strip is of a triangular structure and comprises a bottom surface and two inclined planes; the bottom surface and the inclined surface extend along the length direction of the prism strip; the intersection lines of the two inclined planes and the bottom surface respectively form first edges; the intersection line of the two inclined planes forms a second edge; the first edge is a wavy line which periodically fluctuates on a plane parallel to the bottom surface; the second edge is a wavy line which periodically fluctuates on a plane vertical to the bottom surface; the first edges, close to each other, of the adjacent prism strips are overlapped.

2. The anti-moire prism sheet as defined in claim 1, wherein: the cross section of the prism strip is of an isosceles triangle structure.

3. The anti-moire prism sheet as defined in claim 1, wherein: the second edge has a height H relative to the bottom surface; h is more than or equal to 3um and less than or equal to 50 um.

4. The anti-moire prism sheet as defined in claim 1, wherein: the fluctuation amplitude of the first edge and the second edge is 0.5um-5 um.

5. The anti-moire prism sheet as defined in claim 1, wherein: a vertex angle is formed between the two inclined planes; the top angle is 60-120 degrees.

6. The anti-moire prism sheet as defined in claim 1, wherein: the distance between the second edges of the adjacent prism strips is 10-100 um.