KR20140053496A - Multilayered brightness enhancement film - Google Patents
Multilayered brightness enhancement film Download PDFInfo
- 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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- South Korea
- Prior art keywords
- lens
- brightness enhancement
- enhancement film
- film
- brightness
- Prior art date
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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
Description
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
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
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
The
The
The brightness enhancement film according to the present invention can be configured such that one unit of the brightness enhancement film including the
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
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
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
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
7 (A) is a view showing a state in which the
7B is a unit structure of a lens pattern formed by partially overlapping the
7C shows a unit structure in which the contacts of the first lens and the second lens of the
7D shows a unit structure in which the contacts of the first lens and the second lens of the
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)
(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.
Priority Applications (1)
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KR1020120119474A KR20140053496A (en) | 2012-10-26 | 2012-10-26 | Multilayered brightness enhancement film |
Applications Claiming Priority (1)
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KR1020120119474A KR20140053496A (en) | 2012-10-26 | 2012-10-26 | Multilayered brightness enhancement film |
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KR1020120119474A KR20140053496A (en) | 2012-10-26 | 2012-10-26 | Multilayered brightness enhancement film |
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Cited By (1)
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 |
-
2012
- 2012-10-26 KR KR1020120119474A patent/KR20140053496A/en not_active Application Discontinuation
Cited By (1)
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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