KR20140053496A - Multilayered brightness enhancement film - Google Patents

Multilayered brightness enhancement film Download PDF

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Publication number
KR20140053496A
KR20140053496A KR1020120119474A KR20120119474A KR20140053496A KR 20140053496 A KR20140053496 A KR 20140053496A KR 1020120119474 A KR1020120119474 A KR 1020120119474A KR 20120119474 A KR20120119474 A KR 20120119474A KR 20140053496 A KR20140053496 A KR 20140053496A
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KR
South Korea
Prior art keywords
lens
brightness enhancement
enhancement film
film
brightness
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KR1020120119474A
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Korean (ko)
Inventor
황장환
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주식회사 파인텍
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Priority to KR1020120119474A priority Critical patent/KR20140053496A/en
Publication of KR20140053496A publication Critical patent/KR20140053496A/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G02B5/045—Prism arrays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

The present invention provides a multi-layered brightness enhancement film having at least two brightness enhancement films horizontally laminated thereon, comprising (A) a prism mountain which has a protrusion part with respect to a horizontal plane, wherein the protrusion part is in a shape of a symmetrical isosceles triangle; (B) a lens pattern which has a first lens and a second lens on a first oblique side and a second oblique side of the prism mountain respectively; and (C) a base film attached to the lower portion of the prism mountain and the lens pattern.

Description

[0001] Multilayered Brightness Enhancement Film [

More particularly, the present invention relates to a multi-layer brightness enhancing film capable of maximizing a light-collecting property, a brightness and a viewing angle.

2. Description of the Related Art Display devices that have been recently developed and mass-produced include a liquid crystal display (LCD), a plasma display panel (PDP), and organic light emitting diodes (OLED). 2. Description of the Related Art A liquid crystal display (LCD) is an electric device that converts various electrical information generated in various devices into visual information using a change in transmittance of a liquid crystal according to an applied voltage. The LCD includes a color filter and a TFT (Thin Film Transistor) , A liquid crystal injected therebetween, and a backlight unit (BLU). Unlike a CRT (Cathode-Ray Tube), a liquid crystal display device requires a backlight unit because it is a light-receiving device requiring a light source. The backlight unit (BLU) has a characteristic that the luminance of the entire screen is high and uniformly maintained in need.

1 is a perspective view schematically showing a conventional backlight unit.

1, the conventional backlight unit includes an LED light source 1, a light guide plate 2 for uniformly irradiating incident light from the LED light source 1, a light guide plate 2 disposed on a lower surface of the light guide plate 2, A reflective sheet 3 for reflecting incident light from the LED light source 1 in an upward direction to prevent light loss, a diffusion plate 4 disposed on the upper surface of the light guide plate for increasing uniformity of light, (5) for improving the brightness of incident light incident from the diffuser plate and a protective sheet (6) for protecting the structure of the brightness enhancement film (5) It is common. The dual brightness enhancement film (5) is required to have a property of improving the overall brightness because of its excellent light collecting ability to dispersed light.

2 is a cross-sectional view schematically showing a conventional multilayer brightness enhancement film.

As shown in Fig. 2, the cross section of the conventional brightness enhancement film has a triangular shape. When a conventional brightness enhancement film is constituted by a plurality of layers, light traveling from the light source to the bottom surface of the first brightness enhancement film 5a under the first brightness enhancement film 5a at an incident angle larger than the critical angle is reflected , Light traveling at an incident angle smaller than the critical angle is incident into the first brightness enhancement film 5a. At this time, the incident light passes through the first brightness enhancement film 5a to the second brightness enhancement film 5b and is refracted in the direction of the arrow. However, in the process of refracting and converging light from the lower part to the upper part, light loss occurs because the light-collecting power is not excellent. That is, when a liquid crystal display in which a conventional brightness enhancement film is laminated is produced, a bright image of high luminance is produced on the front surface of the liquid crystal display, but light is guided to the entire surface due to scattered light, As the viewing angle increases, the luminance significantly decreases. Thus, there is a problem that light loss occurs on the entire display surface due to light dispersion occurring on the side of the triangle-shaped brightness enhancement film.

In order to solve the problems of the related art, a backlight assembly capable of improving the brightness of the entire surface of a display has been recently studied. Korean Patent Laid-Open No. 10-2008-0035320 discloses a light guide plate for guiding light from a lamp and a lamp and having first prism patterns formed on the lower surface thereof to be connected to each other, Discloses a backlight assembly including a sheet, first and second prism sheets disposed on an upper portion of a light guide plate, and a side reflection sheet disposed on an upper portion of a second prism sheet, and a liquid crystal display device having the same. However, the side reflection sheet of the above-mentioned Japanese Patent Application Laid-Open No. 10-2008-0035320 is a film formed with a reflective protrusion of a concavo-convex shape and can eliminate the redis phenomenon due to chromatic dispersion to some extent, .

In order to solve the problems of the prior art, the present inventor has proposed a method of manufacturing a brightness enhancement film in accordance with Korean Patent No. 10-1111114, (S2) injecting a resin into the pattern forming portion, (S3) forming a prism mountain and a lens pattern by applying the injected resin onto the base film, and curing the formed prism mountain and the lens pattern (S4 ) Of the present invention. The product of the present invention can be effectively produced by the manufacturing method according to the above-mentioned Japanese Patent No. 10-1111114.

An object of the present invention is to provide a multilayer reinforcement film excellent in light-convergence.

Another object of the present invention is to provide a multilayer reinforcement film in which light loss is prevented and the overall luminance is improved.

It is still another object of the present invention to provide a multilayer reinforcement film having a wide viewing angle.

The above and other objects of the present invention can be achieved by the present invention described below.

The multilayered brightness enhancement film according to the present invention comprises: (A) a prism mountain having a protrusion with respect to a horizontal plane, the protrusion having a right-left symmetrical isosceles triangle shape; (B) a lens pattern having a first lens and a second lens formed on the first diagonal side and the second diagonal side of the prism mountain, respectively; And (C) at least two brightness enhancement films made of a base film adhered to the lower part of the prism mountains and the lens pattern are laminated horizontally.

Here, the first lens and the second lens have the same shape of a left-right symmetry when they are divided in half with respect to a semi-spherical or half-spherical longitudinal section of the lens pattern, and the radius of the lens pattern is equal to the height of the prism mountain .

And the prism mountains extend in parallel with respect to the vertical plane and have a stripe shape as a whole.

The lens pattern is continuously formed at regular intervals on the surfaces of the prism mountains having a stripe shape extending in parallel to the longitudinal sides in contact with the first hypotenuse and the second hypotenuse of the prism mountain having a stripe shape .

The brightness enhancement film is characterized in that the internal angle formed by the first hypotenuse and the second hypotenuse of the prism acid exceeds 0 DEG and is less than 180 DEG.

The brightness enhancement film is characterized in that the internal angle formed by the end face of the first lens of the lens pattern and the end face of the second lens is greater than 0 DEG and less than 180 DEG.

And the lens pattern has a shape of a convex lens cut so as to have a diameter equal to or smaller than a maximum diameter of a semispherical or semi-elliptical spherical shape.

The base film is characterized by being made of polyethylene terephthalate (PET).

Wherein the multilayered brightness enhancement film comprises a brightness enhancement film and an upper brightness enhancement film, and when observing the brightness enhancement film and the upper brightness enhancement film in an upper vertical direction. The radius K1 of the first lens of the brightness enhancement film is equal to the radius of the second lens of the brightness enhancement film and the radius K2 of the first lens of the upper brightness enhancement film is equal to the radius of the second lens of the upper brightness enhancement film And K1 and K2 are the same.

When observing the brightness enhancement film and the upper layer brightness enhancement film in the upper vertical direction, the horizontal distance between the contact points of the first lens and the second lens of the brightness enhancement film and the contact points of the first lens and the second lens of the upper layer brightness enhancement film Is equal to or smaller than the diameter of the first lens of the brightness enhancement film, and is equal to or greater than zero.

A first connection line L1 connecting the center of the first lens of the brightness enhancement film and the center of the second lens of the brightness enhancement film when the brightness enhancement film and the upper layer brightness enhancement film are viewed from above in the vertical direction, A second connecting line (L2) connecting the center of the first lens of the brightness enhancement film and the center of the second lens of the upper brightness enhancement film, a second connection line (L2) connecting the center of the first lens of the brightness enhancement film and the center of the first lens The shape of the third connecting line L3 connected to the center and the fourth connecting line L4 connecting the center of the second lens of the brightness enhancement film and the center of the second lens of the upper brightness enhancement film is a rectangular shape .

The shape of the quadrangle may be a square, a rectangle, a rhombus, or a trapezoid.

INDUSTRIAL APPLICABILITY The present invention has the effect of providing a multi-layer brightness reinforcing film having excellent light-collecting properties, preventing light loss, having overall improved brightness, and having a wide viewing angle.

1 is a perspective view schematically showing a conventional backlight unit.
2 is a cross-sectional view schematically showing a conventional multilayer brightness enhancement film.
3 is a perspective view schematically showing an embodiment of a brightness enhancement film according to the present invention.
4 is a perspective view schematically showing an embodiment of a multilayer reinforcement film according to the present invention.
5 is a perspective view schematically showing still another embodiment of a multilayer brightness enhancement film according to the present invention.
6 is a front view (A) and a side view (B) schematically showing a multilayer reinforced film according to the present invention.
7 is an explanatory view schematically showing various structures of a lens pattern of a brightness enhancement film and a lens pattern of an upper layer brightness enhancement film according to the present invention.

Hereinafter, a multi-layer brightness enhancement film according to the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the following description, and any person skilled in the art may deviate from the technical idea of the present invention The present invention may be embodied in many other forms without departing from the spirit or scope of the invention.

3 is a perspective view schematically showing an embodiment of a brightness enhancement film according to the present invention.

3, the brightness enhancement film 100 according to the present invention has a protrusion with respect to the surface of the horizontal brightness enhancement film, and the protrusion has a prism mountain 120 having a symmetrical triangular shape, A lens pattern 130 composed of a first lens 131 and a second lens 132 formed in contact with the first hypotenuse 121 and the second hypotenuse 122 of the base film 110 and the base film 110 .

The prism mountains 120 of the brightness enhancement film 100 of the present invention may be configured to have a stripe shape extending in parallel to the longitudinal plane of the prism mountains 120. However, this is merely an example, and the continuous shape of the prism mountains 120 may be formed in other shapes than the stripe, and the prism mountains 120, which can be easily derived by those skilled in the art from the technical aspects of the present invention, It will be appreciated that all of the simple modifications to the shape of the present invention are included in the scope of the present invention.

The lens pattern 130 according to the present invention includes a first lens 131 and a second lens 132. Each lens is in contact with the first hypotenuse and the second hypotenuse of the prism mountain, As shown in FIG. However, the arrangement in which the lens patterns 130 are continuously formed may be formed continuously in contact with the lens patterns, and it may be formed continuously from the technical aspects of the present invention by a person skilled in the art It is contemplated that all modifications to the arrangements are within the scope of the invention.

The brightness enhancement film according to the present invention can be configured such that one unit of the brightness enhancement film including the prism mountains 120 and the lens pattern 130 is continuously formed in parallel and the brightness of the stripe shape The reinforcing film may be formed so as to be continuously formed in parallel so that a brightness enhancement film suitable for a desired size can be manufactured and used. The material of the base film 110 of the present invention is not particularly limited, but it is preferable to use a PET (Poly Ethylene Itphthalate) film.

4 is a perspective view schematically showing an embodiment of a multilayer reinforcement film according to the present invention.

As shown in FIG. 4, the multi-layer brightness enhancement film according to the present invention can be formed by laminating the upper brightness enhancement film 200 on the brightness enhancement film 100. Here, the brightness enhancement film 100 has a structure in which the prism mountains 120 formed by the first hypotenuse 121 and the second hypotenuse 122 of the prism mountains are continuously arranged in a stripe shape, the first hypotenuse The first lens 131 of the lens pattern is formed in contact with the second lens 121 of the lens pattern and the second lens 132 of the lens pattern is formed in contact with the second constriction 122 of the prism mountain. The upper layer brightness enhancement film 200 is laminated horizontally in the same direction as the brightness enhancement film 100 and has an upper layer prism mountain 220 composed of a first hypotenuse 221 and a second hypotenuse 222 of the upper layer prism mountain, The first lens 231 of the upper layer lens pattern is formed in contact with the first hypotenuse 221 of the upper prism mountain in a structure continuously arranged in the stripe shape, And the second lens 232 of the upper layer lens pattern is formed in contact with the second lens 232. 4, the light rays incident on the brightness enhancement film are incident on the brightness enhancement film depending on the arrangement and arrangement interval of the lens pattern 130 and the upper lens pattern 230, And the viewing angle. That is, the arrangement of the lens pattern 130 and the upper lens pattern 230 can be divided into a case of exactly overlapping, a case of overlapping partially, or a case of not overlapping at all. If the lens pattern 130 and the upper layer lens pattern 230 are not observed to be in contact with each other when observing from the upper vertical direction in the case where they do not overlap at all, It is not preferable because light loss occurs through a position where the lens pattern is not formed. Therefore, it is preferable that the lens pattern 130 and the upper lens pattern 230 according to the present invention are configured such that they are observed in a structure in which tangential lines are tangent to each other even when they do not overlap at all when viewed from the upper vertical direction. In addition, when the lens pattern 130 and the upper lens pattern 230 are spaced apart from each other in the vertical direction, it is necessary to have a tangent at least tangent to each other to minimize the optical loss. Therefore, it is preferable that the arrangement interval between the lens pattern and the lens pattern is equal to or smaller than the diameter of the first lens or the second lens of the lens pattern.

5 is a perspective view schematically showing still another embodiment of a multilayer brightness enhancement film according to the present invention.

As shown in FIG. 5, the multilayered brightness enhancement film according to the present invention can be configured such that the upper brightness enhancement film 200 is horizontally stacked in a direction perpendicular to the brightness enhancement film 100. In this case, when the lens pattern 130 and the upper lens pattern 230 are arranged in the vertical direction, the contact between the first lens 131 and the second lens 132 of the lens pattern is the first lens The second lens 232, and the second lens 232, respectively. However, in order to minimize the optical loss as in the case of FIG. 4, it is preferable that the arrangement interval between the lens pattern and the lens pattern be equal to or smaller than the diameter of the first lens or the second lens.

Although FIGS. 4 and 5 illustrate one embodiment in which the multilayer reinforcement film according to the present invention is composed of two layers, the arrangement and structure of the multilayer lens patterns are only one example, and those skilled in the art can easily understand It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

6 is a front view (A) and a side view (B) schematically showing a multilayer reinforced film according to the present invention.

6A, the multilayered brightness enhancement film according to the present invention has a structure in which the upper layer brightness enhancement film 200 is laminated on the brightness enhancement film 100, And an upper layer brightness enhancement film (200). That is, the light incident from the bottom enters the air layer through the brightness enhancement film 100, is incident again on the upper layer brightness enhancement film 200, and then is condensed to the outside. In this case, by adjusting the arrangement of the brightness enhancement film 100 and the upper brightness enhancement film 200, the light loss of the incident light from the bottom can be minimized. Also, as shown in FIG. 6 (B), it can be seen that the multi-layer brightness enhancement film according to the present invention can be constituted with a structure and arrangement capable of minimizing light loss. With this structure and arrangement, the light loss of the incident light from the bottom can be minimized and the degree of light condensation can be increased, so that a light having a wide viewing angle and a wide viewing angle can be provided to the display.

7 is an explanatory view schematically showing various structures of a lens pattern of a brightness enhancement film and a lens pattern of an upper layer brightness enhancement film according to the present invention.

In FIG. 7, the dotted line indicates the shape of the lens pattern 130 positioned on the lower layer when viewed from the upper vertical direction, and the solid line indicates the upper layer lens pattern 230 located on the upper layer when viewed from the upper vertical direction. As shown in FIG. Here, K1 is the radius of the lens pattern 130, and K2 is the radius of the upper layer lens pattern 230. L1 is a distance between the first lens and the second lens of the lens pattern 130. L2 is a distance between the first lens and the second lens of the upper lens pattern 230. L3 is a distance L4 is the distance between the second lens of the lens pattern 130 and the upper lens pattern 230 is the distance between the first lens and the first lens of the upper lens pattern 230. [

7 (A) is a view showing a state in which the lens pattern 130 of the brightness enhancement film and the upper layer lens pattern 230 of the upper layer brightness enhancement film do not overlap each other when viewed from the upper vertical direction, Structure in which the distance between the lens pattern and the lens pattern is equal to or smaller than the diameter of the lens pattern. When observing the brightness enhancement film and the upper brightness enhancement film in the vertical direction from above, the first lens and the second lens of the lens pattern 130 have the same radius, and the first lens of the upper lens pattern 230 Assuming that the radius of the second lens is the same and the radius of the first lens of the lens pattern 130 is K1 and the radius of the first lens of the upper lens pattern 230 is K2, K1 = K2 = k , A first connecting line (L1) connecting the center of the first lens of the brightness enhancement film and the center of the second lens of the brightness enhancement film, a first connection line (L1) connecting the center of the first lens of the upper brightness enhancement film, A third connection line L3 connecting the center of the first lens of the brightness enhancement film and the center of the first lens of the upper layer brightness enhancement film, and a second connection line L2 connecting the center of the first lens of the brightness enhancement film, The center of the second lens of the film and the center of the second lens of the upper layer brightness enhancement film The fourth connection line (L4) which is connected to the other words, L1 = L2 = L3 = L4 = 2k. In this case, since the light incident from the lower portion of the lens pattern 130 and the upper layer lens pattern 230 is condensed in the upward direction, there is an advantage that the condensing power and brightness enhancement are generated, and the overall viewing angle is widened. However, although light loss may occur in a space between the lens pattern 130 and the upper lens pattern 230, an additional brightness enhancement film may be laminated on the upper brightness enhancement film to further enhance the brightness and the viewing angle effect .

7B is a unit structure of a lens pattern formed by partially overlapping the lens pattern 130 and the upper lens pattern 230 when viewed from the upper layer direction and the distance between the lens pattern and the lens pattern is equal to the diameter of the lens pattern Or a maximum distance when the distance is small. Assuming that K1 = K2 = k, L1 = L2 = 2k, L3 = 2k + ?, and L4 = 2k- ?. In this case, there is a problem that light scattering occurs in the space between the unit lens pattern and the unit lens pattern, although light scattering in the unit lens pattern hardly occurs. However, in this case, it is possible to laminate an additional brightness enhancement film on top of the upper brightness enhancement film, or to minimize the light loss by adjusting the position of the upper lens pattern 230 with respect to the lens pattern 130 depending on the application.

7C shows a unit structure in which the contacts of the first lens and the second lens of the lens pattern 130 are shared with the contacts of the first lens and the second lens of the upper lens pattern 230 when viewed from the upper layer direction In one embodiment, there is an advantage that no light loss occurs in the unit lens pattern at all. Assuming that K1 = K2 = k, L1 = L2 = 2k and L3 = L4 = 2k. However, since optical loss can occur between the unit lens pattern and the unit lens pattern, the optical loss can be minimized and the problem can be overcome as described above.

7D shows a unit structure in which the contacts of the first lens and the second lens of the lens pattern 130 are shared with the contacts of the first lens and the second lens of the upper lens pattern 230 when viewed from the upper layer direction There is an advantage that no light loss occurs in the unit lens pattern at all. Here, assuming that K1 = K2 = k, L1 = L2 = 2k and L3 = L4 = 2k-a. However, since optical loss can occur between the unit lens pattern and the unit lens pattern, the optical loss can be minimized and the problem can be overcome as described above.

As described above, the shape formed by the first connection line L1, the second connection line L2, the third connection line L3, and the fourth connection line L4 has a rectangular shape, and the shape of the square is a square, When a rectangular, rhombic or trapezoidal shape is specified, it is possible to manufacture a multilayer reinforced film capable of maximizing brightness and viewing angle effect.

Although the present invention has been described with reference to the embodiments shown in the drawings, it is to be understood that various changes and modifications may be made without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100: Brightness enhancing film 110: Base film
120: prism acid 121: first hypotenuse of prism acid
122: second diagonal of prism mountain 130: lens pattern
131: first lens of lens pattern 132: second lens of lens pattern
200: upper layer brightness enhancement film 210: upper layer substrate film
220: upper layer prism acid 221: first side of upper layer prism acid
222: second hypotenuse of the upper prism mountain 230: upper lens pattern
231: first lens of upper lens pattern 232: second lens of upper lens pattern

Claims (12)

(A) a prism mountain having protrusions with respect to a horizontal plane, the protrusions being symmetrical in an isosceles triangle shape;
(B) a lens pattern having a first lens and a second lens formed on a first diagonal side and a second diagonal side of the prism mountain, respectively; And
(C) a base film attached to the lower portion of the prism mountain and the lens pattern;
Wherein at least two of the plurality of brightness enhancement films are laminated horizontally. The lens system according to claim 1, wherein the first lens and the second lens have the same shape of a left-right symmetry when they are divided in half with respect to a semispherical or semi-elliptic spherical longitudinal section of the lens pattern, And the height of the multilayer reinforcement film. The multi-layer brightness intensifying film according to claim 1, wherein the prism mountains extend in parallel to a longitudinal direction and have a stripe shape as a whole. 3. The prism lens according to claim 2, wherein the lens pattern has a stripe shape having a stripe shape and a first diagonal side and a second diagonal side of the prism mountain having a stripe shape, Wherein the film is continuously formed at regular intervals. The multilayer intensity-strengthening film according to claim 1, wherein the brightness enhancement film has an internal angle formed by a first hypotenuse of the prism acid and a second hypotenuse exceeding 0 DEG and less than 180 DEG. The multi-layer brightness intensifying film according to claim 1, wherein the brightness enhancement film has an internal angle formed by the cross section of the first lens of the lens pattern and the cross section of the second lens is more than 0 degrees and less than 180 degrees. The multilayer reinforcement film according to claim 1, wherein the lens pattern has a shape of a convex lens cut so as to have a diameter equal to or less than a hemispherical or semi-elliptic spherical maximum diameter. The multi-layer brightness enhancing film according to claim 1, wherein the base film is made of polyethylene terephthalate (PET). The multi-layer brightness enhancing film according to claim 1, wherein the multilayer brightness enhancing film comprises a brightness enhancement film and an upper brightness enhancement film, and when observing the brightness enhancement film and the upper brightness enhancement film in an upper vertical direction. The radius K1 of the first lens of the brightness enhancement film is equal to the radius of the second lens of the brightness enhancement film and the radius K2 of the first lens of the upper brightness enhancement film is equal to the radius of the second lens of the upper brightness enhancement film , And K1 and K2 are the same. The method of claim 9, wherein when the brightness enhancement film and the upper layer brightness enhancement film are viewed from above in the vertical direction, the contact between the first lens and the second lens of the brightness enhancement film, Wherein the horizontal distance between the contact points of the lenses is smaller than or equal to the diameter of the first lens of the brightness enhancement film, and is equal to or greater than zero. The method of manufacturing a brightness enhancement film according to claim 9, wherein, when the brightness enhancement film and the upper layer brightness enhancement film are viewed from above in the vertical direction, the first connection line connecting the center of the first lens of the brightness enhancement film and the center of the second lens of the brightness enhancement film (L2) connecting the center of the first lens of the upper layer brightness enhancement film and the center of the second lens of the upper layer brightness enhancement film, a second connection line (L2) connecting the center of the first lens of the brightness enhancement film and the upper layer brightness enhancement film A third connecting line L3 connecting the center of the first lens of the film and a fourth connecting line L4 connecting the center of the second lens of the brightness enhancement film and the center of the second lens of the upper layer brightness enhancement film Wherein the film has a rectangular shape. The multilayer intensity enhancing film according to claim 11, wherein the shape of the quadrangle has a shape of a square, a rectangle, a rhombus, or a trapezoid.
KR1020120119474A 2012-10-26 2012-10-26 Multilayered brightness enhancement film KR20140053496A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108445565A (en) * 2018-03-16 2018-08-24 京东方科技集团股份有限公司 The preparation method of prismatic lens, backlight module, display and prismatic lens

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108445565A (en) * 2018-03-16 2018-08-24 京东方科技集团股份有限公司 The preparation method of prismatic lens, backlight module, display and prismatic lens

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