Optical film structure and optical film

Abstract

The utility model relates to an optical film structure and an optical film. The optical film structure comprises an inverse prismatic lens and a positive prismatic lens, wherein the inverse prismatic lens and the positive prismatic lens are oppositely arranged up and down; the positive prismatic lens is additionally arranged, the reverse prismatic lens and the positive prismatic lens are oppositely arranged in a staggered mode, the reverse prismatic lens condenses light up and down, the positive prismatic lens condenses light left and right, the reverse prismatic lens enables an emergent surface to form double-angle up and down light condensation, a positive prism pattern is formed, the high refractive index is achieved, the brightness is improved, and narrow-viewing-angle adjustment is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to display technical field especially, relate to an optical film structure and optical film. BACKGROUND

[0002] In the optical film, in order to improve brightness, like prior art, it has used inverse prism structure, but in order to protect privacy, need to adjust appropriate viewing angle, and need to adjust narrow viewing angle, also need to improve brightness, prior art still cannot do so. INNOVATION CONTENT

[0003] The utility model aims at the deficiency of prior art to provide an optical film structure and optical film, make inverse prism sheet and positive prism sheet opposite arrangement, inverse prism sheet upper and lower light concentration, positive prism sheet left and right light concentration, inverse prism sheet forms positive prism pattern with double-angle upper and lower light concentration, realizes high refractive index, improves brightness, realizes narrow viewing angle adjustment.

[0004] The utility model is realized by adopting the following technical scheme:

[0005] An optical film structure, comprising:

[0006] Inverse prism sheet and positive prism sheet, wherein,

[0007] Inverse prism sheet and positive prism sheet are arranged oppositely in up and down.

[0008] Further, it further includes first bottom sheet and second bottom sheet, and inverse prism sheet and positive prism sheet are oppositely arranged between first bottom sheet and second bottom sheet.

[0009] Further, inverse prism sheet is arranged at the lower end of second bottom sheet, and positive prism sheet is arranged at the upper end of first bottom sheet.

[0010] Further, the upper end of inverse prism sheet is attached to the lower end of second bottom sheet, inverse prism sheet is provided with a plurality of arranged columnar lenses A, and the lower end of inverse prism sheet is oppositely arranged with the upper end of positive prism sheet.

[0011] The structure of columnar lens A is:

[0012] It comprises left side a part right angle prism and right side b part right angle prism, wherein the right side edge upper section of right side b part right angle prism is a bevel structure, and c part right angle prism is arranged.

[0013] Further, the lower end of positive prism sheet is attached to the upper end of first bottom sheet, and positive prism sheet is provided with a plurality of arranged columnar lenses B.

[0014] Further, the structure of columnar lens B is that the top end angle is an obtuse angle greater than 100 degrees.

[0015] Further, a light guide plate is arranged at the lower end of first bottom sheet.

[0016] Further, the light guide plate is provided with a light source which can transmit light to the direction of the light guide plate.

[0017] Further, the first and second bottom sheets are made of light-transmissive PET, PC or PP material.

[0018] An optical film includes any of the above optical film structures.

[0019] Compared with the prior art, the utility model has the following beneficial technical effects:

[0020] Increase the positive prism piece, and make the inverse prism piece and the positive prism piece opposite dislocation setting, the inverse prism piece concentrates light up and down, the positive prism piece concentrates light left and right, the inverse prism piece forms double angle light concentration up and down with the exit surface, forms the positive prism pattern, realizes high refractive index, improves brightness, realizes narrow viewing angle adjustment. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the structural schematic diagram of the utility model;

[0022] Figure 2 It is the sectional view of positive prism piece columnar lens B of the utility model;

[0023] Figure 3 It is the sectional view of inverse prism piece columnar lens A of the utility model;

[0024] Figure 4 It is the structural schematic diagram of prior art;

[0025] Figure 5 It is the simulation imaging diagram of prior art;

[0026] Figure 6 It is the center diagram of light flux of prior art;

[0027] Figure 7 It is the simulation imaging diagram of the utility model;

[0028] Figure 8 It is the center diagram of light flux of the utility model.

[0029] REFERENCE NUMERALS

[0030] 10, inverse prism piece; 20, positive prism piece; 30, first bottom sheet; 40, second bottom sheet; 50, light guide plate; 60, light source. DETAILED DESCRIPTION

[0031] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0032] Example 1

[0033] like Figure 1 As shown, an optical film structure includes:

[0034] 10 reverse prisms and 20 positive prisms; among which,

[0035] The reverse prism sheet 10 and the positive prism sheet 20 are arranged vertically opposite each other.

[0036] It also includes a first film 30 and a second film 40, with a reverse prism sheet 10 and a positive prism sheet 20 disposed opposite each other between the first film 30 and the second film 40.

[0037] The reverse prism sheet 10 is located at the lower end of the second film 40, and the positive prism sheet 20 is located at the upper end of the first film 30.

[0038] The upper end of the reverse prism 10 is attached to the lower end of the second film 40. The reverse prism 10 is provided with a plurality of arranged cylindrical lenses A. The lower end of the reverse prism 10 is arranged opposite to the upper end of the positive prism 20.

[0039] The cylindrical lens A is configured as follows:

[0040] It includes a right-angle prism on the left (a) and a right-angle prism on the right (b). The upper right side of the right-angle prism on the right (b) has an offset structure and a right-angle prism on the c.

[0041] Depend on Figure 3 As shown, the cylindrical lens A of its reverse prism 10 has a refractive index of 1.48 when its length is 18μm, its height is 15.6μm, and the sum of its two angles is 63.3 degrees.

[0042] The reverse prism 10 is configured as a combination of cylindrical lenses A with different upper and lower angles. Through dual-angle control, the upper and lower angles control the incident light, thereby increasing the refractive index.

[0043] The lower end of the prism sheet 20 is attached to the upper end of the first film 30, and the prism sheet 20 is provided with a plurality of arranged cylindrical lenses B.

[0044] The cylindrical lens B is configured with an obtuse angle at its top end greater than 100 degrees.

[0045] likeFigure 2 As shown, the refractive index of the cylindrical lens B of the positive prism sheet 20 is 1.65 when the length is 50 μm, the height is 6.7 μm, and the vertex angle is 150 degrees.

[0046] The cylindrical lens B provided on the positive prism sheet 20 is provided with an obtuse angle with a vertex angle greater than 100 degrees, so as to simultaneously form left and right and upper and lower incident light, and realize narrow viewing angle

[0047] The lower end of the first bottom sheet 30 is provided with a light guide plate 50.

[0048] One side of the light guide plate 50 is provided with a light source 60 capable of transmitting light to the light guide plate.

[0049] The first bottom sheet 30 and the second bottom sheet 40 are made of light-transmissive PET, PC or PP material.

[0050] In one possible embodiment, the first bottom sheet 30 and the second bottom sheet 40 can also be formed of materials that allow visible light to pass through.

[0051] An optical film, comprising the optical film structure of any one of the above.

[0052] According to Figures 4-6 It can be seen that:

[0053] The center value and the maximum value of the prior art simulation image are 100.0% and 112.5%;

[0054] The peak values of the viewing angle up and down and left and right are 28 / 48;

[0055] The specification of the reverse prism sheet is not restricted;

[0056] The center value of the light flux is 100 / 100;

[0057] The peak values of the viewing angle up and down and left and right are 19 / 60, 0;

[0058] According to Figures 7-8 It can be seen that:

[0059] The center value and the maximum value of the simulation image are 167.4% / 167.4%;

[0060] The peak values of the viewing angle up and down and left and right are 26 / 48;

[0061] The specification of the reverse prism sheet and the positive prism sheet is: 150 degrees 50P / RI1.65;

[0062] The center value of the light flux is 119 / 119;

[0063] The peak values of the viewing angle up and down and left and right are 19 / 31, 0;

[0064] As shown in the above description,Figures 7-8 It can be seen that, compared with the existing Figures 4-6 The structure composed of a positive prism and an inverse prism increases the light flux value, reduces the peak values of the upper, lower, left and right, improves the brightness, and can adjust the narrow viewing angle.

[0065] In addition, in the case of the optical film of the present application, the refractive index of the positive prism 20 is higher than that of the inverse prism 10.

[0066] Therefore, the farther away from the light source 60, the smaller the influence on the color coordinates, and the narrower the viewing angle.

[0067] Light path explanation:

[0068] Incident light rays (positive prism sheet)

[0069] The light rays enter from the lower obtuse angle positive prism and undergo internal reflection.

[0070] First light control (internal reflection in the positive prism and limited directional propagation);

[0071] Due to the obtuse angle shape, the light rays propagate only in a specific direction;

[0072] Exiting light rays (inverse prism sheet exit);

[0073] The light rays finally exit from the upper inverse prism sheet and are limited in a specific direction.

[0074] Through this process, the viewing angle can be adjusted and the light rays can be prevented from spreading in unnecessary directions.

[0075] Reason for narrowing the light path:

[0076] Single-layer inverse prism structure:

[0077] The light rays are limited in a specific direction, but can only be adjusted within a certain range;

[0078] The viewing angle is limited, but it is difficult to completely narrow it.

[0079] Inverse prism + positive prism structure:

[0080] Due to the addition of the obtuse angle positive prism, the internal reflection is increased;

[0081] Further concentrate the direction of the light rays and block the light rays propagating in unnecessary directions;

[0082] Finally, the viewing angle is further narrowed.

[0083] Example 2

[0084] An optical film comprising the optical film structure of any one of the above.

[0085] The above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some technical features therein can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An optical film structure, characterized in that, include: Reverse prism (10) and positive prism (20); among which, The reverse prism sheet (10) and the positive prism sheet (20) are arranged vertically opposite each other.

2. The optical film structure according to claim 1, characterized in that: It also includes a first film (30) and a second film (40), wherein the reverse prism sheet (10) and the positive prism sheet (20) are disposed opposite to each other between the first film (30) and the second film (40).

3. The optical film structure according to claim 2, characterized in that, The reverse prism sheet (10) is located at the lower end of the second film (40), and the positive prism sheet (20) is located at the upper end of the first film (30).

4. The optical film structure as described in claim 3, characterized in that: The upper end of the reverse prism (10) is attached to the lower end of the second film (40). The reverse prism (10) is provided with a plurality of cylindrical lenses A arranged in a row. The lower end of the reverse prism (10) is arranged opposite to the upper end of the positive prism (20). The cylindrical lens A is configured as follows: It includes a right-angle prism on the left (a) and a right-angle prism on the right (b). The upper right side of the right-angle prism on the right (b) has an offset structure and a right-angle prism on the c.

5. The optical film structure according to claim 4, characterized in that: The lower end of the prism sheet (20) is attached to the upper end of the first film (30), and the prism sheet (20) is provided with a plurality of cylindrical lenses B arranged in a row.

6. The optical film structure according to claim 5, characterized in that: The cylindrical lens B is configured such that the top angle is an obtuse angle greater than 100 degrees.

7. The optical film structure according to claim 3, characterized in that: The first film (30) has a light guide plate (50) at its lower end.

8. The optical film structure according to claim 7, characterized in that: A light source (60) is provided on one side of the light guide plate (50) to transmit light in the direction of the light guide plate.

9. The optical film structure according to claim 3, characterized in that: The first film (30) and the second film (40) are made of light-transmitting PET, PC or PP material.

10. An optical film, characterized in that, Including the optical film structure as described in any one of claims 1-9.

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