CN214278576U - Interference-reducing brightness enhancement film and backlight module - Google Patents
Interference-reducing brightness enhancement film and backlight module Download PDFInfo
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- CN214278576U CN214278576U CN202022232061.4U CN202022232061U CN214278576U CN 214278576 U CN214278576 U CN 214278576U CN 202022232061 U CN202022232061 U CN 202022232061U CN 214278576 U CN214278576 U CN 214278576U
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Abstract
The utility model relates to an optical film technical field especially relates to an interference reduction brightness enhancement film. The interference reduction brightness enhancement film comprises a substrate and a prism structure stacked on the substrate, wherein the prism structure is formed by a plurality of triangular prisms, the central line of one triangular prism is not parallel to the central line of the other triangular prism, and the central line is the central line from the peak of each triangular prism to the plane of the substrate. Above-mentioned subtract and interfere brightness enhancement film because there is the crest to the base in a plurality of prisms three prism the non-parallel prism of central line on plane for it is irregular to subtract the prism structure who interferes brightness enhancement film, thereby has strengthened the diffusion of light, compares in the current brightness enhancement film that interferes that subtracts, can effectively reduce the production of optical defects such as mole line, interference fringe, eliminates picture harmful effects, promotes user experience, and manufacturing cost is also lower.
Description
Technical Field
The utility model relates to an optical film technical field especially relates to an subtract and interfere brightness enhancement film and backlight unit.
Background
The interference reducing brightness enhancement film is also called a prism sheet, and is widely applied to a backlight module of a liquid crystal display to improve the luminous efficiency of the whole backlight module. The interference reduction brightness enhancement film comprises a prism structure, and light rays in all directions can be concentrated to a central visual angle by utilizing the special prism structure of the interference reduction brightness enhancement film through optical principles such as refraction, total reflection, light accumulation and the like, so that the brightness of the liquid crystal display is improved and the visual angle is controlled.
However, as the resolution of the lcd is higher and higher, the liquid crystal pixel pitch is relatively smaller, and the conventional interference reduction brightness enhancement film is prone to generate optical defects such as moire fringes and interference fringes, which seriously affect the user experience.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: provides an interference reduction brightness enhancement film and a backlight module, aiming at solving the problem that the interference reduction brightness enhancement film is easy to generate optical defects such as moire fringes and interference fringes.
In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides an interference reduction brightness enhancement film, including the base with range upon range of prism structure on the base, the prism structure is formed by a plurality of triangular prisms, and wherein the central line of one of the triangular prism and another the central line of triangular prism are not parallel, and the central line is the crest of triangular prism to the central line of the plane that the base is located, and arbitrary triangular prism peak value is periodic variation.
Optionally, included angles between a center line from the peak of each of the triangular prisms to the plane of the substrate and a perpendicular line to the plane of the substrate sequentially vary linearly.
Optionally, included angles between central lines from the peaks of the triangular prisms to the plane of the substrate and a perpendicular line to the plane of the substrate sequentially change in a quadratic or multiple polynomial manner.
Optionally, an included angle between a center line from a peak of the triangular prism to the plane of the substrate and a perpendicular line to the plane of the substrate is randomly changed.
Optionally, included angles between a center line from the peak of each of the triangular prisms to the plane of the substrate and a perpendicular line to the plane of the substrate sequentially change in a waveform manner.
Optionally, an included angle between a center line from a peak of any of the triangular prisms to the plane of the substrate and a perpendicular line to the plane of the substrate is less than 30 °.
Optionally, the variation of the peak value of the prism structure is less than 50% of the height from the peak of the prism structure to the plane of the substrate.
Optionally, the peak variation of any prism is less than 50% of the height from the peak of the prism to the plane where the substrate is located.
Optionally, the difference between the height from the peak of one of the largest triangular prisms to the plane of the substrate and the height from the peak of the other smallest triangular prism to the plane of the substrate is less than 50% of the height of the prism structure.
In addition, the utility model also provides a backlight module, include as above-mentioned arbitrary subtract and interfere brightness enhancement film.
Implement the embodiment of the utility model provides a, will have following beneficial effect: above-mentioned subtract and interfere brightness enhancement film because there is the crest to the base in a plurality of prisms three prism the non-parallel prism of central line on plane for it is irregular to subtract the prism structure who interferes brightness enhancement film, thereby has strengthened the diffusion of light, compares in the current brightness enhancement film that interferes that subtracts, can effectively reduce the production of optical defects such as mole line, interference fringe, eliminates picture harmful effects, promotes user experience, and manufacturing cost is also lower.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Wherein:
FIG. 1 is an exploded view of a liquid crystal display;
FIG. 2 is a schematic view of an interference reducing brightness enhancement film;
FIG. 3 is a front view of a first embodiment of an interference reducing brightness enhancement film according to the present invention;
FIG. 4 is a front view of a second embodiment of an interference reducing brightness enhancement film according to the present invention;
fig. 5 a is a schematic view of a stripe generated when the brightness enhancement film 100 rolled by the pressing wheel of the present invention is applied to a backlight module;
fig. 5 b is a schematic view of the brightness enhancement film 100 rolled by the conventional pressing roller applied to the stripes generated by the backlight module;
fig. 5 c is a schematic view of a stripe generated when the brightness enhancement film 100 rolled by the conventional pressing roller is applied to the backlight module;
fig. 5 d is a schematic view of the stripes generated by applying the brightness enhancement film 100 to the backlight module after rolling with the conventional press roller.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
An embodiment of the present invention provides an interference-reducing brightness enhancement film 100, as shown in fig. 1 to 4, the interference-reducing brightness enhancement film 100 includes a substrate 10 and a prism structure stacked on the substrate 10, the prism structure is formed by a plurality of triangular prisms 20, and a central line of one of the triangular prisms 20 is not parallel to a central line of another triangular prism 20, and the central line is a central line of a peak of the triangular prism 20 to a plane where the substrate 10 is located. It should be noted that, in the plurality of triangular prisms 20, at least two triangular prisms 20 whose peaks are not parallel to the center line of the plane where the substrate 10 is located may exist, and at this time, the entire prism structure may exhibit irregular variation, thereby improving the stripe phenomenon.
Above-mentioned subtract and interfere brightness enhancement film 100 because there is the crest to the base 10 in a plurality of triangular prisms 20 in the planar triangular prism of central line nonparallel for it is irregular to subtract the prism structure of interfering brightness enhancement film 100, thereby has strengthened the diffusion of light, compares in current subtract and interferes brightness enhancement film 100, can effectively reduce the production of optical defects such as mole line, interference fringe, eliminates the harmful effects of picture, promotes user experience, and manufacturing cost is also lower.
As shown in fig. 1, the lcd sequentially includes a liquid crystal panel 200, two interference reduction brightness enhancement films 100, a diffusion sheet 300, a light guide plate 400 and a reflection sheet 500, and by using the special prism structure of the interference reduction brightness enhancement film 100, light rays in each direction can be concentrated to a central viewing angle by optical principles such as refraction, total reflection and light accumulation, so as to improve the brightness of the lcd and control the viewing angle, and optical defects such as moire fringes and interference fringes can be effectively blocked.
In the present embodiment, the included angles b between the central line from the peak of the triangular prisms 20 to the plane of the substrate 10 and the perpendicular line of the plane of the substrate 10 sequentially and linearly change. Specifically, in the present embodiment, the included angle between the center line from the peak of the triangular prism 20 to the plane of the substrate 10 and the perpendicular line to the plane of the substrate 10 may sequentially exhibit linear regular changes, so that the effect of shielding the optical defect by the whole interference reduction brightness enhancement film 100 is ensured, and the production and processing of the whole interference reduction brightness enhancement film 100 are facilitated.
In the present embodiment, the included angle b between the central line from the peak of the plurality of triangular prisms 20 to the plane of the substrate 10 and the perpendicular line to the plane of the substrate 10 is sequentially changed by a quadratic or a multiple polynomial. Therefore, the effect of shielding optical defects by the whole interference reduction brightness enhancement film 100 is ensured, and meanwhile, the included angle between the center line from the peak of the triangular prism 20 to the plane of the substrate 10 and the perpendicular line of the plane of the substrate 10 is convenient to change, so that the production and processing of the whole interference reduction brightness enhancement film 100 are completed.
In the present embodiment, an angle b between a center line from a peak of the plurality of triangular prisms 20 to the plane of the substrate 10 and a perpendicular line to the plane of the substrate 10 varies randomly. Specifically, in the present embodiment, an included angle between a center line from a peak of the plurality of triangular prisms 20 to a plane of the substrate 10 and a perpendicular line to the plane of the substrate 10 can be arbitrarily changed according to actual requirements, so that the surface of the interference reduction brightness enhancement film 100 is more disordered, and the requirement of eliminating optical defects on the surface of the interference reduction brightness enhancement film 100 is better satisfied.
In the present embodiment, the included angle b between the center line from the peak of the triangular prisms 20 to the plane of the substrate 10 and the perpendicular line to the plane of the substrate 10 is changed in a waveform manner. Specifically, in the present embodiment, an included angle between a center line of a plane where the peaks of the plurality of triangular prisms 20 are located to the substrate 10 and a perpendicular line of the plane where the substrate 10 is located is changed in a sine wave, a square wave, a sawtooth wave, a triangular wave, or other waveforms in sequence, so as to ensure that the whole interference reduction brightness enhancement film 100 shields the optical defect effect, and facilitate changing the included angle between the center line of the plane where the peaks of the triangular prisms 20 are located to the substrate 10 and the perpendicular line of the plane where the substrate 10 is located.
In the present embodiment, an angle b between a center line of a peak of any of the triangular prisms 20 to a plane of the substrate 10 and a perpendicular line of the plane of the substrate 10 is less than 30 °. That is, only when the included angle between the center line from the peak of the prism 20 to the plane of the substrate 10 and the perpendicular line to the plane of the substrate 10 falls within the range, the brightness is sacrificed, but the interference reduction brightness enhancement film 100 has a better fringe removing effect and a better picture texture.
In the present embodiment, the variation of the prism structure peak is less than 50% of the height from the prism structure peak to the plane of the substrate 10. Specifically, in an embodiment, as shown in fig. 3, the heights of the peaks of the triangular prisms 20 from the plane where the substrate 10 is located are the same, and at this time, the variation of the peak of any triangular prism 20 is less than 50% of the height of the peak of the triangular prism 20 from the plane where the substrate 10 is located, and the total variation of the peak of the prism structure is less than 50% of the height of the peak of the prism structure from the plane where the substrate 10 is located; in another embodiment, as shown in fig. 4, heights of the peaks of the prisms 20 from the base 10 are different, and at this time, a difference Δ H2 between a height of a peak of one of the largest prisms 20 from the base 10 and a height of a peak of another smallest prism 20 from the base 10 is less than 50% of a height of the prism structure, a peak variation of any prism 20 is less than 50% of a height of the peak of the prism 20 from the base 10, and a total peak variation of the prism structure is less than 50% of a height of a peak of the prism structure from the base 10, wherein the total peak variation of the prism structure is a superposition of a peak variation of any prism 20 and Δ H2. When the interference reduction brightness enhancement film 100 is applied to a backlight system, the generation of optical defects such as interference fringes and moire fringes can be effectively avoided.
As shown in fig. 5, a in fig. 5 is that the utility model discloses a subtract and interfere the schematic diagram of the fringe that brightness enhancement film 100 was applied to backlight unit and produced, b, c, d in fig. 5 are the present schematic diagram of subtracting the fringe that brightness enhancement film 100 was applied to backlight unit and produced, can obviously observe interference fringe or mole line phenomenon from b, c, d in fig. 5, and a in fig. 5 can see out the utility model discloses a subtract and interfere brightness enhancement film 100 has improved the optics flaw greatly, has reduced the appearance of optics fringe, has promoted the whole effect of subtracting interference brightness enhancement film 100.
The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.
Claims (9)
1. The interference reduction and brightness enhancement film is characterized by comprising a substrate and a prism structure stacked on the substrate, wherein the prism structure is formed by a plurality of triangular prisms, the central line of one of the triangular prisms is not parallel to the central line of the other triangular prism, the central line is the central line from the peak of the triangular prism to the plane of the substrate, the peak value of any triangular prism changes periodically, and the included angle between the central line from the peak of any triangular prism to the plane of the substrate and the perpendicular line of the plane of the substrate is smaller than 30 degrees.
2. The film of claim 1, wherein angles between a center line from a peak of each of the plurality of triangular prisms to the plane of the substrate and a perpendicular to the plane of the substrate sequentially vary linearly.
3. The film of claim 1, wherein the angle between the center line from the apex of the triangular prism to the plane of the substrate and the perpendicular to the plane of the substrate varies in a quadratic or a multiple polynomial manner.
4. The film of claim 1, wherein the angle between the center line of the apex of the triangular prism and the plane of the substrate and the perpendicular to the plane of the substrate varies randomly.
5. The film of claim 1, wherein the angle between the center line of the triangular prisms from the apex to the plane of the substrate and the perpendicular to the plane of the substrate varies in a wave shape.
6. The interference reducing brightness enhancing film according to any one of claims 1-5, wherein the variation of the prism structure peak value is less than 50% of the height from the prism structure peak to the plane of the substrate.
7. The film of claim 6, wherein the peak variation of each of the triangular prisms is less than 50% of the height from the peak of the triangular prism to the plane of the substrate.
8. The interference reducing brightness enhancing film of claim 7 wherein the difference between the height of one largest of the triangular prisms from its apex to the plane of the base and the height of the other smallest of the triangular prisms from its apex to the plane of the base is less than 50% of the height of the prismatic structure.
9. A backlight module comprising the interference reduction brightness enhancement film according to any one of claims 1 to 8.
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| CN202022232061.4U CN214278576U (en) | 2020-10-09 | 2020-10-09 | Interference-reducing brightness enhancement film and backlight module |
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| CN202022232061.4U CN214278576U (en) | 2020-10-09 | 2020-10-09 | Interference-reducing brightness enhancement film and backlight module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112285973A (en) * | 2020-10-09 | 2021-01-29 | 东莞市光志光电有限公司 | Interference-reducing brightness enhancement film, pinch roller and preparation method of pinch roller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112285973A (en) * | 2020-10-09 | 2021-01-29 | 东莞市光志光电有限公司 | Interference-reducing brightness enhancement film, pinch roller and preparation method of pinch roller |
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