CN203164452U - Brightness enhancement film - Google Patents
Brightness enhancement film Download PDFInfo
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- CN203164452U CN203164452U CN 201220715067 CN201220715067U CN203164452U CN 203164452 U CN203164452 U CN 203164452U CN 201220715067 CN201220715067 CN 201220715067 CN 201220715067 U CN201220715067 U CN 201220715067U CN 203164452 U CN203164452 U CN 203164452U
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Abstract
A brightness enhancement film comprises a base material and a prism structure layer. The base material comprises a first optical surface and a second optical surface which are opposite to each other. The prism structure layer is arranged on the first optical surface. The prism structure layer is formed by several groups of first prism units and second prism units which combine in pairs, are in an undulating shape and are arranged in an array along a same direction. Cross sections of the first prism units, which are cut by a plane vertical to the prism stretching direction, are triangular structures and the cross sections are the triangular structures with at least more than two shapes. The cross sections of the second prism units, which are cut by the plane vertical to the prism stretching direction, are the triangular structures whose vertex angle is in an outer convex smooth curve type. A second prism unit height h2 is greater than a first prism unit height h1. The brightness enhancement film of the utility model mitigates a water vapor adsorption light leakage phenomenon caused by long-distance pasting of a traditional prism structure and a problem that luminous energy is insufficient at an original ''cut-off '' position is solved. A scratch resistance function is possessed and an excellent optical property is possessed too.
Description
Technical field
The utility model discloses a kind of brightness enhancement film.
Background technology
At present, brightness enhancement film (BEF, Brightness Enhancement Film) the normal brightness enhancement film (BEF) of using increases display brightness and the energy of saving the display battery apparatus in the display devices such as the light that light source is sent, especially monitor to be used for converging to be widely used in illuminating module.The principle of brightness enhancement film is by refraction and reflection the light outside the directive observer visual angle to be adjusted within the observer visual angle, has so just improved the utilization factor of luminous energy that light source sends.
Yet, general brightness enhancement film is usually used with other diaphragm collocation in practice, for example two prismatic lenses are mutually orthogonal overlapping with prism direction, wherein the prism structure of a prismatic lens contacts with the back side shiny surface of another kind of prismatic lens, and for example a prismatic lens contacts with the smooth liquid crystal panel of LCD.The tradition brightness enhancement film as shown in Figure 1, traditional prism structure peak portion is linear, can fit tightly with the smooth face length distance of collocation diaphragm, easily cause steam in time to discharge and adsorb with shiny surface on, cause light to enter the globule of absorption thus and then directly enter next diaphragm, cause the tangible light leakage phenomena of visual sense feeling easily, influence the optical quality of LCD.For this reason, disclose the brightness enhancement film that a kind of prism structure is the dipping and heaving shape in the prior art (US6354709B1), as shown in Figure 2, this brightness enhancement film is mainly in order to play the effect of effective prevention steam absorption.
But prism structure has sharp-pointed corner angle in the general brightness enhancement film, is easy to cause scratch in use or transmittance process, thereby has influenced optical quality; In addition, its structure prism fluctuating period T causes relief part comparatively outstanding less than 40H, is subjected to applied external force easily in the use and bursts apart.
Be subject to this problem of scratch in order to solve sharp corners, US Patent No. 7142767 discloses a kind of brightness enhancement film with anti-scratch function, its structure is the prism columns of fillet or platform for increase some tops in traditional brightness enhancement film prism array, these prism heights are higher than its peripheral ordinary construction prism columns, thereby can play anti-scratch effect of rubbing.
Prism structure unit vertical cross-section is isosceles triangle in the general brightness enhancement film, thus light is converged in the positive less angle of screen, the observer is in the plane perpendicular to the prism direction of extension, face from zero degree that observed brightness meeting reduces gradually when moving to than wide-angle, generally speaking, when approximately moving to 30 ° to 40 ° scope, brightness reduces not obvious, greatly in 40 °～50 ° scopes, the brightness meeting obviously reduces, make the observer can't see screen display content clearly, this phenomenon is referred to as " cut-off " phenomenon.Disclose angle asymmetric brightness enhancement film in base angle, a kind of prism cross section in the prior art (US5917664), this brightness enhancement film mainly alleviates the effect of " cut-off " phenomenon in order to play for this reason.
Therefore, in order addressing the above problem all sidedly, must to improve existing prism structure brightness enhancement film, to the objective of the invention is to develop a kind of novel scratch resistant and can solve the brightness enhancement film of steam absorption and " cut-off " phenomenon.
The utility model content
The purpose of this utility model is to propose a kind of brightness enhancement film, has solved that existing brightness enhancement film steam easily adsorbs, prism structure easy damaged, " cut-off " phenomenon and other blooming defect problems.
For reaching this purpose, the utility model by the following technical solutions:
A kind of brightness enhancement film, comprise base material and prism structure layer, described base material comprises the first relative optical surface and second optical surface, described prism structure layer is arranged on first optical surface, described prism structure layer is formed by same direction arrangement by first prism unit and second prism unit that several equal undulates rise and fall, described first prism unit is triangular structure by the xsect that the plane intercepted of vertical prism direction of extension, and described xsect has two kinds of difform triangular structures at least, described second prism unit is that drift angle is outer protruding slick curve class triangular structure by the xsect that the plane intercepted of vertical prism direction of extension, described outer protruding slick curve is smooth circular arc, and the second prism unit height h2 is greater than the height h1 of first prism unit.
Preferably, the described first prism unit height h1 between 2 μ m～300 μ m, the described second prism unit height h2 between 4 μ m～350 μ m, the difference in height of second prism unit and first prism unit, namely the value of h2-h1 is between 2 μ m～50 μ m.
Preferably, the cross-sectional triangle of described first prism unit is the base with the limit that is positioned at described first optical surface, base length is that drift angle is between 50 °～140 ° between 0.5～5 times of the described first prism height h1, and two base angle angles are between 25 °～75 °.
Preferably, the xsect of described second prism unit is that drift angle is that the class triangle of outer protruding slick curve is the base with the limit that is positioned at described first optical surface, base length is between 0.5～5 times of the described second prism height h2, the dual-side angle is between 50 °～140 °, two base angle angles between 25 °～75 °, outer protruding slick curve length at 1 μ m between the 40 μ m.
Preferably, second prism unit is distributed between first prism unit in the above prism structure layer of prism arrangement direction, and every interval n first prism unit namely arranges second prism unit of a projection, and wherein n is between 1～50.
Preferably, the first prism unit average height that described height rises and falls is H1, fluctuating period T 1 and T1〉40*H1, the second prism unit average height that described height rises and falls is H2, fluctuating period T 2 and T2〉40*H2.
Preferably, the height h1 of first prism unit on the prism length extending direction periodically the fluctuations scope be its average height H1 2%～20% between.
Preferably, the height h2 of second prism unit on the prism length extending direction periodically the fluctuations scope be its average height H2 2%～20% between.
Preferably, the described first adjacent prism unit and the second prism unit top spacing are between 10 μ m～300 μ m.
Preferably, the material of described prism structure layer is the ultraviolet light photopolymerization resin of epoxy resin, carbamates, polyethylene kind or polyesters.
Preferably, described base material is PET or PMMA.
The beneficial effects of the utility model are:
Brightness enhancement film of the present utility model has the prism structure that just rises and falls, can alleviate because the conventional prism structure is long causes steam to adsorb light leakage phenomena apart from fitting, and the prism cross section is asymmetrical state, the direction that converges part light departs from positive apparent direction, has remedied the problem of locating the luminous energy deficiency at former " cut-off "; Also have the second prism unit structure of giving prominence to and do not have sharp corners, can play anti-scratch function therefore, this brightness enhancement film has better optical quality performance.
Description of drawings
Fig. 1 is the brightness enhancement film synoptic diagram of traditional structure;
Fig. 2 A is the synoptic diagram of prior art bright enhancement film US Patent No. 6354709;
Fig. 2 B is the structural representation of prior art US7142767;
Fig. 2 C is the structural representation of prior art US5917664;
Fig. 3 is the synoptic diagram that has the prism structure brightness enhancement film 100 that just rises and falls among the embodiment 1;
Fig. 4 has height to rise and fall prism structure brightness enhancement film 100 by the cross sectional representation that the plane intercepted of vertical prism direction of extension 110B among the embodiment 1;
Fig. 5 is the side view of prism structure layer 108 among the embodiment 1;
Fig. 6 is the synoptic diagram that has the prism structure brightness enhancement film 200 of height fluctuating among the embodiment 2;
Fig. 7 be among the embodiment 2 brightness enhancement film 200 by the cross sectional representation that the plane intercepted of vertical prism direction of extension 210A;
Fig. 8 is the side view of prism structure layer 208 among the embodiment 2;
Fig. 9 is the synoptic diagram that has the prism structure brightness enhancement film 300 of height fluctuating among the embodiment 3;
Figure 10 be among the embodiment 3 brightness enhancement film 300 by the cross sectional representation that the plane intercepted of vertical prism direction of extension 310A;
Figure 11 is the side view of prism structure layer 308 among the embodiment 3.
Embodiment
Below in conjunction with drawings and Examples the utility model is described further.
Be illustrated in figure 1 as common structure of reflection reducting coating synoptic diagram, as shown in the figure, brightness enhancement film comprises base material 1 and the prism structure layer 2 that is positioned on the base material, and prism structure layer 2 constitutes in order to the prism bar that converges light by many, these prism bar are arranged according to a direction, form prism array.
Prism structure is the structure of reflection reducting coating synoptic diagram of dipping and heaving shape shown in Fig. 2 A, and prism structure layer 21 can effectively prevent the absorption of steam for the structure that dipping and heaving changes among the figure.
Be the structure of reflection reducting coating synoptic diagram that prism structure layer top has fillet as Fig. 2 B, prism structure 22 upper tops have fillet 220 among the figure, make this anti-reflection film have anti-scratch function.
Fig. 2 C is the asymmetric structure of reflection reducting coating synoptic diagram of prism structure base angle angle of prism structure layer, because prism structure 22 is irregular, asymmetric, therefore can effectively reduce " cut-off " phenomenon.
Embodiment 1:
Fig. 3 is the synoptic diagram that has the brightness enhancement film 100 of the prism structure that just rises and falls among the embodiment 1, brightness enhancement film 100 includes base material 102 among this embodiment, base material 102 has first optical surface 106 and second optical surface 104 that is positioned at first optical surface, 106 opposites, first optical surface 106 is provided with prism structure layer 108, prism structure layer 108 is arranged by same direction 110A by the first prism unit 118A and the second prism unit 118B and is formed, and prism unit 118 has the state that is the periodicity dipping and heaving with respect to first optical surface 106 along prism direction of extension 110B.The dipping and heaving period T of prism unit 118 is all identical in this embodiment 1, every two first prism unit 118A second a prism unit 118B is set namely in the prism structure layer 108 on prism arrangement direction 110A described in this embodiment 1.
Fig. 4 for brightness enhancement film 100 among Fig. 3 by the cross-sectional structure synoptic diagram that the plane intercepted of vertical prism direction of extension 110B, described xsect is by spaced the forming of xsect figure C of xsect figure A and B and the second prism unit 118B of the first prism unit 118A, angle a1 is 30 °, a2 is 60 °, b1 is 60 °, b2 is 30 °, and c1, c2 are 45 °, A and B top spacing L1 be 28.9 μ m, B and C top spacing L2 be 75.4 μ m for, C and A top spacing L3 be 75.3 μ m.The described second prism unit xsect drift angle is smooth circular arc, and fillet half-angle R is 5 μ m.Every two first prism unit 118A second a prism unit 118B is set namely among this embodiment 1.
Fig. 5 is the side view of middle prism structure layer 108 among Fig. 3, and described first prism unit 118A height h1 changes continuously along prism direction of extension 110B, and its Changing Pattern is h1=25+2sin[(1/325) X], its average height H1 is 25 μ m.Described second prism unit 118B height h2 changes continuously along prism direction of extension 110B, and its Changing Pattern is h2=30+2sin[(1/325) X], its average height H2 is 30 μ m.The first prism unit 118A described in this embodiment 1 is identical with the second prism unit 118B dipping and heaving period T, T=650 π.
Embodiment 2:
Fig. 6 is the synoptic diagram that has the brightness enhancement film 200 of the prism structure that just rises and falls among the embodiment 2, brightness enhancement film 200 includes base material 202 among this embodiment, base material 202 has first optical surface 206 and second optical surface 204 that is positioned at first optical surface, 206 opposites, first optical surface 206 is provided with prism structure layer 208, prism structure layer 208 is arranged by same direction 210A by the first prism unit 218A and the second prism unit 218B and is formed, and prism unit 218 has the state that is the periodicity dipping and heaving with respect to first optical surface 206 along prism direction of extension 210B.The dipping and heaving period T 1 of the first prism unit 218A is all identical in this embodiment, the dipping and heaving period T 2 of the second prism unit 218B is all identical, described in this embodiment 2 in the prism structure layer 208 on prism arrangement direction 210A the first prism unit 218A and the second prism unit 218B spaced.
Fig. 7 for brightness enhancement film 200 among Fig. 6 by the xsect that the plane intercepted of vertical prism direction of extension 210B, described xsect is formed by prism arrangement direction 210A arrangement by the xsect figure A of the first prism unit 218A and the xsect figure C of B and the second prism unit 218B, angle a1 is 50 °, a2 is 60 °, b1 is 60 °, b2 is 50 °, c1, c2 is 45 °, the described second prism unit xsect drift angle is smooth circular arc, fillet half-angle R is 5 μ m, A, B top and nearer C top distance L 1, L2 is 52.4 μ m, A, the B top is 59.6 μ m with C top far away distance L 3.Every first a prism unit 218A second a prism unit 218B is set namely among this embodiment 2.
Fig. 8 is to be the side view of prism structure layer 208 among Fig. 6, described first prism unit 218A height h1 changes continuously along prism direction of extension 210B, its Changing Pattern is h1=30+4sin[(1/250) X], its average height H1 is 30 μ m, and the described first prism unit 218A dipping and heaving period T 1 is 500 π.Described second prism unit 218B height h2 changes continuously along prism direction of extension 210B, and its Changing Pattern is h2=33+2sin[(1/300X], its average height H2 is 33 μ m, the second prism unit 218B dipping and heaving period T 2 is 600 π.Among this embodiment 2, the first prism unit 218A is different with the second prism unit 218B dipping and heaving cycle.
Embodiment 3:
Fig. 9 is the synoptic diagram that has the brightness enhancement film 300 of the prism structure that just rises and falls among the embodiment 3, brightness enhancement film 300 includes base material 302 among this embodiment, base material 302 has first optical surface 306 and second optical surface 304 that is positioned at first optical surface, 306 opposites, first optical surface 306 is provided with prism structure layer 308, prism structure layer 308 is arranged by same direction 310A by the first prism unit 318A and the second prism unit 318B and is formed, and prism unit 318 has the state that is the periodicity dipping and heaving with respect to first optical surface 306 along prism direction of extension 310B.The dipping and heaving period T of prism unit 318 is all identical in this embodiment 3, every four first prism unit 318A second a prism unit 318B is set namely in the prism structure layer 308 on prism arrangement direction 310A described in this embodiment.
Figure 10 for brightness enhancement film 300 among Fig. 9 by the xsect that the plane intercepted of vertical prism direction of extension 310B, described xsect is formed by prism arrangement direction 310A arrangement by the xsect figure A of the first prism unit 318A and the xsect figure C of B and the second prism unit 318B, angle a1 is 30 °, a2 is 50 °, b1 is 50 °, b2 is 40 °, c1, c2 is 50 °, the transversal Noodles gable-top of described second prism unit angle is smooth circular arc, fillet half-angle R is 15 μ m, closer distance L1 between A and B top, L3 is 46 μ m, and remote L2 is 81.9 μ m between A and B top, B and C top distance L 4 are 70.4 μ m, and A and C top distance L 5 are 92.5 μ m.Every four first prism unit 318A second a prism unit 318B is set namely among this embodiment 3, and the described first prism unit 318A has two kinds of different height, the height of the described second prism unit 318B is all identical.
Figure 11 is the side view of prism structure layer 308 among Fig. 9, described first prism unit 318A height h1 changes continuously along prism direction of extension 310B, its Changing Pattern is: xsect is first prism unit height h1 (A)=30+2*sin[(1/350) X of A], its average height H1 (A) is 30 μ m; Xsect is first prism unit height h1 (B)=25+2*sin[(1/350) X of B], its average height H1 (B) is 25 μ m.Described second prism unit 318B height h2 changes continuously along prism direction of extension 310B, and its Changing Pattern is h2=40+2*sin[(1/350X], its average height H2 is 40 μ m.Among this embodiment 3, the first prism unit 318A is identical with the second prism unit 318B dipping and heaving period T, all is 700 π.
Claims (10)
1. a brightness enhancement film comprises base material and prism structure layer, and described base material comprises the first relative optical surface and second optical surface, and described prism structure layer is arranged on first optical surface, it is characterized in that:
Described prism structure layer is formed by same direction arrangement by first prism unit and second prism unit that several equal undulates rise and fall, described first prism unit is triangular structure by the xsect that the plane intercepted of vertical prism direction of extension, and described xsect has two kinds of difform triangular structures at least, described second prism unit is that drift angle is outer protruding slick curve class triangular structure by the xsect that the plane intercepted of vertical prism direction of extension, and the second prism unit height h2 is greater than the height h1 of first prism unit.
2. a kind of brightness enhancement film as claimed in claim 1, it is characterized in that: the described first prism unit height h1 is between 2 μ m～300 μ m, the described second prism unit height h2 is between 4 μ m～350 μ m, the difference in height of second prism unit and first prism unit, namely the value of h2-h1 is between 2 μ m～50 μ m.
3. a kind of brightness enhancement film as claimed in claim 1, it is characterized in that: the cross-sectional triangle of described first prism unit is the base with the limit that is positioned at described first optical surface, base length is between 0.5～5 times of the described first prism height h1, drift angle is between 50 °～140 °, and two base angle angles are between 25 °～75 °.
4. a kind of brightness enhancement film as claimed in claim 1, it is characterized in that: the xsect of described second prism unit is that drift angle is that the class triangle of outer protruding slick curve is the base with the limit that is positioned at described first optical surface, base length is between 0.5～5 times of the described second prism height h2, the dual-side angle is between 50 °～140 °, two base angle angles between 25 °～75 °, outer protruding slick curve length at 1 μ m between the 40 μ m.
5. a kind of brightness enhancement film as claimed in claim 1, it is characterized in that: second prism unit is distributed between first prism unit in the above prism structure layer of prism arrangement direction, every interval n first prism unit namely arranges second prism unit of a projection, and wherein n is between 1～50.
6. a kind of brightness enhancement film as claimed in claim 1, it is characterized in that: the first prism unit average height that described height rises and falls is H1, fluctuating period T 1 and T1〉40*H1, the second prism unit average height that described height rises and falls is H2, fluctuating period T 2 and T2〉40*H2.
7. a kind of brightness enhancement film as claimed in claim 1 is characterized in that: the height h1 of first prism unit on the prism length extending direction periodically the fluctuations scope for its average height H1 2%～20% between.
8. a kind of brightness enhancement film as claimed in claim 1 is characterized in that: the height h2 of second prism unit on the prism length extending direction periodically the fluctuations scope for its average height H2 2%～20% between.
9. a kind of brightness enhancement film as claimed in claim 1, it is characterized in that: the described first adjacent prism unit and the second prism unit top spacing are between 10 μ m～300 μ m.
10. according to each described a kind of brightness enhancement film of claim 1-8, it is characterized in that: described base material is PET or PMMA, and the prism structure layer material is the ultraviolet light photopolymerization resin of epoxy resin, carbamates, polyethylene kind or polyesters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220715067 CN203164452U (en) | 2012-12-21 | 2012-12-21 | Brightness enhancement film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220715067 CN203164452U (en) | 2012-12-21 | 2012-12-21 | Brightness enhancement film |
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| Publication Number | Publication Date |
|---|---|
| CN203164452U true CN203164452U (en) | 2013-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220715067 Expired - Lifetime CN203164452U (en) | 2012-12-21 | 2012-12-21 | Brightness enhancement film |
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| CN (1) | CN203164452U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106886067A (en) * | 2015-12-15 | 2017-06-23 | 宁波长阳科技股份有限公司 | A kind of composite brightening film and preparation method thereof |
| CN112462456A (en) * | 2020-11-29 | 2021-03-09 | 昇印光电（昆山）股份有限公司 | Optical film, manufacturing method and electronic equipment cover plate with optical film |
-
2012
- 2012-12-21 CN CN 201220715067 patent/CN203164452U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106886067A (en) * | 2015-12-15 | 2017-06-23 | 宁波长阳科技股份有限公司 | A kind of composite brightening film and preparation method thereof |
| CN112462456A (en) * | 2020-11-29 | 2021-03-09 | 昇印光电（昆山）股份有限公司 | Optical film, manufacturing method and electronic equipment cover plate with optical film |
| CN112462456B (en) * | 2020-11-29 | 2023-10-20 | 昇印光电（昆山）股份有限公司 | Optical film, manufacturing method and electronic equipment cover plate carrying same |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: ZHANGJIAGANG FREE TRADE ZONE KANGDE FILM INDUSTRY Co.,Ltd. Assignor: ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL Co.,Ltd. Contract record no.: 2014320010018 Denomination of utility model: Brightness enhancement film and preparation method thereof Granted publication date: 20130828 License type: Exclusive License Record date: 20140228 |
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| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
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Date of cancellation: 20220121 Granted publication date: 20130828 |
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Granted publication date: 20130828 |