JP3114140U - Prism condensing film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a prism condensing film having a condensing function in a horizontal direction and a vertical direction at the same time, easily controlling a horizontal and vertical viewing angle, and meeting a requirement concerning a viewing angle standard of a liquid crystal display device.
SOLUTION: A base and a prism layer formed on the surface of the base, the prism layers being arranged in an alternating manner and a plurality of lateral prismatic microstructures, and a plurality of longitudinal directions The prism-like microstructures are integrally formed.
[Selection] Figure 2

Description

  The present invention relates to a prism condensing film, and more particularly to a prism condensing film used for condensing a backlight module of a liquid crystal display.

  In a conventional liquid crystal display, one or two condensing films and a diffusion film are provided between a liquid crystal panel and a light guide. The light beam guided by the light guide passes through the diffusion film, concentrates on the top of the light collecting film, and is condensed on the front surface of the liquid crystal panel. For this reason, the preferable brightness | luminance for displaying an image is obtained.

  FIG. 1 discloses the structure of a conventional light collecting film. According to the drawing, it is configured to include a base 1 and a prism layer 2 formed on the surface of the base 1. The prism layer is formed by arranging a plurality of rod-like prism-like microstructures having a triangular cross section in a straight line in the same direction, and the light rays irradiated by the principle of light refraction pass through a light guide panel and a diffusion film. Then, it concentrates on the tip of each prism-like microstructure, and is focused on the front of the display device.

  The light collecting film is used to increase the brightness of the screen of the display device. However, the viewing angle of the display device becomes relatively narrow as the light collection effect of the irradiated light increases. Conventional condensing films are limited by the form of prism layer structure. Usually, it can be adapted only to the needs of either standard of the horizontal or vertical viewing angle of the display device.

  As described above, there is a demand for a prism condensing film structure capable of increasing the luminance of the liquid crystal display device and achieving the requirements of the standard of the liquid crystal display device for both horizontal and vertical vision.

  Therefore, the present invention provides a prism condensing film that has a condensing function in the horizontal direction and the vertical direction at the same time, can easily control the horizontal and vertical viewing angles, and meets the requirements concerning the viewing angle standards of the liquid crystal display device. This is the issue.

Therefore, as a result of intensive studies in view of the drawbacks found in the prior art, the present inventor is a prism condensing film composed of a base and a prism layer formed on the surface of the base, An object of the present invention is a prism condensing film in which prism layers are integrally formed by a plurality of lateral prismatic microstructures and a plurality of longitudinal prismatic microstructures arranged alternately in a crossing manner. The present invention was completed based on such knowledge.
Hereinafter, this device will be specifically described.

The prism condensing film according to claim 1 is a prism condensing film composed of a base and a prism layer formed on a surface of the base,
The prism layer is integrally formed by a plurality of lateral prismatic microstructures arranged in an alternating manner and a plurality of longitudinal prismatic microstructures.

  The prism condensing film described in claim 2 is a circular arc surface in which the inclined surface of the prismatic microstructure in claim 1 is recessed inward or protrudes outward.

  The prism condensing film described in claim 3 forms an arc angle at the top and bottom of the prismatic microstructure in claim 1.

  In the prism condensing film described in claim 4, the distance between the bottom ends of the prismatic microstructures in claim 1 is 0 or a numerical value exceeding 0.

  In the prism condensing film described in claim 5, the apex angle of the prismatic microstructure in claim 1 is an angle within a range of 1 degree to 179 degrees.

  In the prism condensing film according to claim 6, the height of the prismatic microstructure in claim 1 is a height protruding upward along the base surface.

  In the prism light-collecting film described in claim 7, the angle at which the prismatic microstructures alternately intersect in claim 1 are in the range of 1 to 179 degrees.

  In the prism condensing film according to claim 8, the arrangement direction of the prismatic microstructure in claim 1 is an angle within a range of 1 to 179 degrees with respect to the outer shape of the prism condensing film.

  In the prism condensing film according to claim 9, the prism layer of the prism condensing film according to claim 1 and the base are made of the same material or different materials.

  The prism condensing film according to claim 10 forms a structure for diffusing light rays at the bottom of the prism condensing film according to claim 1, and the light diffusing structure is directly pressed on the bottom of the prism condensing film. Or coated with a diffusing material and formed integrally.

  The prism condensing film according to claim 11 is formed by integrating the prism condensing film according to claim 1 into one piece, a plurality of pieces, or a plurality of pieces laminated together. Item 10. A prism condensing film according to Item 1.

  The prism condensing film of the present invention combines the lateral prism-like microstructure and the longitudinal prism-like microstructure to form a prism layer integrally, thereby reducing the manufacturing cost and the lateral prism-like film. Due to the difference in the tip, height, and shape of the microstructure and the vertical vertical prism-like microstructure, it is possible to obtain the most excellent horizontal and vertical viewing angles in accordance with the standard demand for the viewing angle of the liquid crystal display.

The present invention relates to a prism condensing film, and more particularly to a prism condensing film used for condensing a backlight module of a liquid crystal display, and comprises a base and a prism layer provided on the surface of the base. The prism layer is formed by alternately arranging a plurality of lateral prism-like microstructures and a plurality of longitudinal vertical prism-like microstructures in an integrated manner, thereby providing a horizontal or vertical light condensing function. And the purpose of adjusting the vertical viewing angle is convenient and can meet the standard of viewing angle of the liquid crystal display.
The prism condensing film having such a configuration will be described below with reference to specific examples in order to describe the structure and features in detail.

  2 and 3 disclose an embodiment of the present invention. According to the drawing, the prism condensing film 10 includes a base 11 and a prism layer 12 formed on the surface of the base 11. The prism layer 12 is formed by integrally arranging a plurality of prismatic microstructures 13 in the horizontal direction and a plurality of prismatic microstructures 14 in the vertical direction so as to cross each other alternately.

  The angle D at which the lateral prismatic microstructure 13 and the longitudinal prismatic structure 14 intersect is preferably a right angle. However, it may be an arbitrary angle in the range of 1 to 179 degrees.

  As disclosed in FIGS. 4 and 5, the prismatic microstructure 13 and the prismatic microstructure 14 constituting the prism layer 12 form slopes 13 a, 13 b, 14 a, and 14 b on both sides along the ridgeline at the upper end, The cross section is formed in a triangular shape. For this reason, each prism-like microstructure 13 and 14 in the entire prism layer is located at a location where four adjacent slopes intersect, and each forms a tapered condensing unit composed of four triangular slopes. . Therefore, the prism condensing film 10 according to the present invention has the condensing ability in the horizontal direction and the vertical direction at the same time.

  The horizontal viewing angle and the vertical viewing angle of the liquid crystal display device vary depending on differences in the apex angle, altitude, or shape of the prismatic microstructure. Therefore, as disclosed in FIGS. 6 and 7, the heights h and h ′ of the prismatic microstructures 13 and 14 in the horizontal direction and the vertical direction of the prism layer 12 in the present invention are standards for the viewing angle of the liquid crystal display device. Can be any equivalent or non-equivalent value that projects upward from the surface of the base. Alternatively, as disclosed in FIG. 8, the apex angles of the prismatic microstructures 13 and 14 in the lateral direction and the longitudinal direction of the prism layer 12 are arbitrarily in the range of 1 degree to 179 degrees, and the same or unequal angle. This gives the most favorable horizontal and vertical vision at the same time.

  The prism-like microstructure described above forms slopes on both sides along the ridgeline at the upper end, but other geometrical slopes may be selected. As disclosed in FIG. 9, the slopes of the prismatic microstructures 13 and 14 may be recessed inward or may be arcuate surfaces 15 protruding outward. In this case, the light receiving area and the refraction range of the respective prism-like microstructures 13 and 14 are expanded.

  Further, as disclosed in FIGS. 2 and 3, the prismatic microstructures 13 and 14 in the horizontal and vertical directions on the light collecting film 10 of the present invention are arranged in a direction according to the outer shape of the light collecting film. However, as disclosed in FIG. 13, the display device may be arranged at an arbitrary angle in the range of 1 to 179 degrees in order to conform to the visual standards in different directions of the display device.

  In the prism condensing film according to the present invention, the prism layer 12 and the base 11 are made of the same material or integrally formed of different materials. Further, as disclosed in FIG. 10, the distance F between the bottom surfaces of the prismatic microstructures 13 and 14 is 0 or any equivalent or different value exceeding 0, and each prismatic microstructure has a different value. An arc angle R may be formed at the top and bottom.

  It can be said that the technology trend is to reduce the manufacturing cost by integrating the components. As disclosed in FIG. 11, the bottom of the prism condensing film 10 according to the present invention forms a structure for diffusing light rays by directly forming a die-molded portion 20 or by covering with a diffusing material 21. Get the diffusion function.

  In summary, the prism condensing film 10 according to the present invention has a prism layer 12 formed by arranging prism-like microstructures 13 and 14 in the horizontal direction and the vertical direction in an interlaced manner. It is characterized by obtaining an optical function at the same time. Further, the most preferable horizontal and vertical visual effects can be obtained by controlling the difference in the vertical angle, height and shape of the prismatic microstructures 13 and 14 in the horizontal and vertical directions. Therefore, the prism light-collecting film 10 according to the present invention is disclosed in the embodiment under the condition that the overall structure of the prism light-collecting film 10 does not deviate substantially from the scope of application of the prism layer components. In addition to the usage form used alone, as shown in FIG. 12, two (or two or more) prism condensing films 10 may be stacked or integrally stacked.

  The above is a preferred embodiment of the present invention, and does not limit the scope of implementation of the present invention. Accordingly, any modifications or changes that can be made by those skilled in the art, which are made within the spirit of the present invention and have an equivalent effect on the present invention, belong to the scope of the utility model registration claim of the present invention. Shall.

It is a perspective view of the conventional condensing film. It is a perspective view of the prism condensing film of this device. It is a top view of the prism condensing film disclosed in FIG. It is the elements on larger scale of the prism condensing film disclosed in FIG. The partial expanded side view of the prism condensing film disclosed in FIG. It is the elements on larger scale of the prism-like microstructure of the prism condensing film disclosed in FIG. It is a fragmentary sectional view of the prism-like microstructure of the prism condensing film disclosed in FIG. It is another partial sectional view of the prism-like microstructure of the prism condensing film disclosed in FIG. It is the other partial sectional view of the prism-like microstructure of the prism condensing film disclosed in FIG. It is a fragmentary sectional view of the prism-like microstructure of the prism condensing film disclosed in FIG. It is another partial sectional view of the prism-like microstructure of the prism condensing film disclosed in FIG. It is explanatory drawing of the prism condensing film disclosed in FIG. It is another explanatory drawing of the prism condensing film disclosed in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base 2 Prism layer 3 Prism-like structure 10 Prism condensing film 11 Base 12 Prism layer 13 Prism-like structure 13a Slope 13b Slope 14 Prism-like microstructure 14a Slope 14b Slope D Angle E Tip angle F Bottom distance h Height h 'Height R Arc angle 15 Arc surface 20 Stamping part 21 Diffusion material

Claims (11)

A prism condensing film composed of a base and a prism layer formed on the surface of the base,
A prism condensing unit comprising the prism layer integrally formed by a plurality of lateral prism-like microstructures arranged in an alternating manner and a plurality of longitudinal prism-like microstructures the film.   2. The prism condensing film according to claim 1, wherein the inclined surface of the prism-like microstructure is an arc surface that is recessed inward or protrudes outward.   The prism condensing film according to claim 1, wherein a circular arc angle is formed at an upper portion and a bottom portion of the prism-like microstructure.   2. The prism condensing film according to claim 1, wherein a distance between bottom ends of the prismatic microstructures is 0 or a numerical value exceeding 0. 3.   2. The prism light-collecting film according to claim 1, wherein an apex angle of the prismatic microstructure is an angle within a range of 1 degree to 179 degrees.   The prism condensing film according to claim 1, wherein the prism-like microstructure has a height protruding upward along the base surface.   The prism condensing film according to claim 1, wherein an angle at which the prismatic microstructures alternately intersect is an angle within a range of 1 degree to 179 degrees.   2. The prism light-collecting film according to claim 1, wherein an arrangement direction of the prism-like microstructures is an angle within a range of 1 to 179 degrees with respect to an outer shape of the prism light-collecting film.   The prism condensing film according to claim 1, wherein the prism layer of the prism condensing film and the base are made of the same material or different materials.   A structure for diffusing light rays is formed at the bottom of the prism condensing film, and the light diffusing structure is directly pressed or molded with a diffusing material on the bottom of the prism condensing film. The prism condensing film according to claim 1, wherein:   The prism light-collecting film according to claim 1, wherein the prism light-condensing film is a single sheet, or a plurality of sheets are stacked or laminated.

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