CN102305956A - Optical compensation film and manufacturing method thereof - Google Patents
Optical compensation film and manufacturing method thereof Download PDFInfo
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- CN102305956A CN102305956A CN201110252268A CN201110252268A CN102305956A CN 102305956 A CN102305956 A CN 102305956A CN 201110252268 A CN201110252268 A CN 201110252268A CN 201110252268 A CN201110252268 A CN 201110252268A CN 102305956 A CN102305956 A CN 102305956A
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Abstract
The invention discloses an optical compensation film and a manufacturing method thereof. The optical compensation film comprises a substrate and a liquid crystal layer. The liquid crystal layer is configured on the substrate and has a first thickness and a second thickness, wherein the first thickness and the second thickness are respectively used for defining a first area and a second area; besides, the second area is adjacent to the first area and the second thickness is greater than the first thickness. According to the optical compensation film provided in the invention, when there is a great wide view, it can be avoided that a red light and a blue light leak.
Description
Technical field
The invention relates to a kind of optical compensation films and manufacturing approach thereof.
Background technology
LCD replaces traditional cathode ray tube (CRT) gradually, and becomes mainstream technology.LCD is to utilize the wherein birefringence of liquid crystal molecule, controls penetrating or covering of light, and reaches the function of display.Well known, LCD has the problem at visual angle.Therefore, many researchers are devoted to improve the not good problem of visual angle of liquid crystal display.
The correlation technique of improving visual angle of liquid crystal display with exploitation includes optical compensation films, MVA (Multi-domain Vertical Alignment) technology and IPS (In-Plane Switching) technology at present; Two technology of MVA and IPS are purposes of improving the visual angle by improving structure of liquid crystal display panel, reaching.The optical compensation membrane technology is outside general liquid crystal panel, additionally additional one deck optical compensation films, the visual angle of improving LCD by this.Optical compensation films can be incorporated in the polaroid, and along with polaroid is integrated together in the liquid crystal panel.Therefore, from processing procedure, the optical compensation membrane technology has special advantage.
Yet, known optical compensation films with great visual angle the time, the problem of ruddiness and blue light light leak still can take place.Therefore, need a kind of brand-new optical compensation films at present badly, the phase can be improved the problems referred to above.
Summary of the invention
Therefore, one of the present invention purpose is to provide a kind of optical compensation films, can improve the problems referred to above.This optical compensation films comprises base material and liquid crystal layer.Liquid crystal layer is disposed on the base material, and liquid crystal layer has first thickness and second thickness to define first area and second area respectively.Second area is in abutting connection with the first area, and second thickness is greater than first thickness.
According to an embodiment of the present invention, above-mentioned base material has a surface micro-structure, and surface micro-structure is positioned at the side of base material in abutting connection with liquid crystal layer.Surface micro-structure comprises first microstructure and second microstructure, and it lays respectively at first area and second area below, and the thickness of first microstructure is greater than the thickness of second microstructure.Surface micro-structure is that the ultraviolet light-curable resin is made.
According to an embodiment of the present invention, above-mentioned optical compensation films can more comprise alignment film, and alignment film is between base material and liquid crystal layer, and alignment film is in abutting connection with liquid crystal layer.
According to an embodiment of the present invention, above-mentioned liquid crystal layer has the 3rd thickness to define the 3rd zone, and the 3rd zone is in abutting connection with second area, and the 3rd thickness is greater than second thickness.
According to an embodiment of the present invention, above-mentioned base material is the birefringence base material, and first thickness is between 1.6 μ m to the 1.7 μ m, and second thickness is between 1.7 μ m to the 1.8 μ m, and the 3rd thickness is between 2.0 μ m to the 2.1 μ m.
According to an embodiment of the present invention, above-mentioned base material is tropism's base materials such as optics, and first thickness is between 2.3 μ m to the 2.4 μ m, and second thickness is between 2.4 μ m to the 2.5 μ m, and the 3rd thickness is between 2.7 μ m to the 2.8 μ m.
Another object of the present invention is to provide a kind of optical compensation films that is used for liquid crystal panel, and it comprises base material, microstructured layers and liquid crystal layer.Microstructured layers is formed on the surface of base material.Microstructured layers comprises a plurality of first microstructures and a plurality of second microstructure.First microstructure and second microstructure are ordered on the base material, and each first microstructure is in abutting connection with at least one second microstructure.The thickness of first microstructure is greater than the thickness of second microstructure.Liquid crystal layer covers microstructured layers, and wherein liquid crystal layer has first thickness and second thickness respectively above first microstructure and above second microstructure, and first thickness is less than second thickness.
Another object of the present invention is, a kind of method of making optical compensation films is provided, and the method comprises following steps.But form the ultraviolet light hard resin-layer on base material.But with object coining ultraviolet light hard resin-layer, to form microstructured layers, microstructured layers has first height and second height, and first highly is different from second height.With the UV-irradiation microstructured layers, make the microstructured layers sclerosis.Then, form the microstructured layers top of liquid crystal layer in sclerosis.
Compared with prior art, optical compensation films of the present invention has a plurality of zoness of different, respectively the interval light of different wave length is carried out optical compensation, can avoid with great visual angle the time, and the problem of ruddiness and blue light light leak takes place.
Description of drawings
Fig. 1 illustrate an embodiment of the present invention optical compensation films diagrammatic cross-section.
Fig. 2 illustrate another embodiment of the present invention optical compensation films diagrammatic cross-section.
Fig. 3 illustrates the process flow diagram of the manufacturing optical compensation film method of an embodiment of the present invention.
Embodiment
More detailed and complete for the narration that makes this disclosure, hereinafter be directed against enforcement aspect of the present invention and specific embodiment and proposed illustrative description; But this is not unique form of implementing or using the specific embodiment of the invention.Following each embodiment that discloses can make up or replace under useful situation each other, also can add other embodiment in one embodiment, and need not further put down in writing or illustrate.
In the following description, many specific detail will be described in detail so that the reader can make much of following embodiment.Yet, can under the situation of not having these specific detail, put into practice embodiments of the invention.In other cases, be simplicity of illustration, the structure of knowing only schematically is illustrated among the figure with device.
Fig. 1 illustrate according to an embodiment of the present invention optical compensation films 100 diagrammatic cross-section.At the optical compensation films 100 of this exposure, can be applicable to utilize light valve (light valve) display device of birefringence, LCD for example is in order to the visual angle of improving display, to picture quality when.As shown in Figure 1, optical compensation films 100 comprises base material 110 and liquid crystal layer 120.
In one embodiment, liquid crystal layer 120 also has the 3rd thickness d 3 in addition to define the 3rd region R 3, as shown in Figure 1.The 3rd region R 3 is in abutting connection with second area R2, and the 3rd thickness d 3 is greater than second thickness d 2.In other words, liquid crystal layer 120 has a similar stair-stepping structure, and has three kinds of different-thickness.
In another embodiment, base material 110 comprises surface micro-structure 112, and surface micro-structure 112 is positioned at the side of base material 110 in abutting connection with liquid crystal layer 120.In this embodiment, surface micro-structure 112 comprises first microstructure 114 and second microstructure 116, and the height h1 of first microstructure 114 is greater than the height h2 of second microstructure 116.First microstructure 114 and second microstructure 116 correspond respectively to the first area R1 and the second area R2 of liquid crystal layer 120.Particularly, first and second microstructure 114,116 lays respectively at the below of first area R1 and second area R2, and allows second thickness d 2 of liquid crystal layer 120 greater than first thickness d 1.In this embodiment, the 3rd region R 3 belows of liquid crystal layer do not have surface micro-structure 112, and therefore the 3rd thickness d 3 is greater than second thickness d 2.In one embodiment, but the arrangement of surface micro-structure 112 systematicness, and make first area R1, second area R2 and the 3rd region R 3 of liquid crystal layer 120 present corresponding systematicness arrangement.In one embodiment, surface micro-structure 112 can for example be that the ultraviolet light-curable resin is made.
Particularly, have in the embodiment of three kinds of different-thickness at liquid crystal layer 120, the liquid crystal layer of first area R1 has minimum thickness (first thickness d 1), can be in order to the light (for example red light) between the compensation long wavelength region.The liquid crystal layer of the 3rd region R 3 has maximum ga(u)ge (the 3rd thickness d 3), can be in order to the light (for example blue light) between the compensation short wavelength region.The liquid crystal layer of second area R2 can be in order to the interval light (for example green light) of compensation medium wavelength.In an application example, the red pixel in the corresponding liquid crystal panel of the first area R1 of liquid crystal layer 120.Similarly, second area R2 and the 3rd region R 3 can correspond respectively to green pixel and blue pixel in the liquid crystal panel.The width of first area R1, second area R2 and the 3rd region R 3 can be designed to the width of red pixel in the liquid crystal panel, green pixel and blue pixel respectively.At above-mentioned embodiment, the width of first area R1, second area R2 and the 3rd region R 3 can for example be about 100 μ m between about 400 μ m, more specifically be that about 200 μ m are extremely between about 350 μ m.
In known techniques, optical compensation films designs and compensates to green light usually, and therefore with great visual angle the time, light leakage phenomena can take place for blue light and ruddiness, causes the bad and contrast decline of picture quality.Compared to known techniques, optical compensation films according to an embodiment of the present invention has a plurality of zoness of different, respectively the interval light of different wave length is carried out optical compensation, and can effectively improve the shortcoming of known techniques.
In one embodiment, base material 110 is tropism's base materials such as optics.Δ n * the d of first area R1, second area R2 and the 3rd region R 3 is respectively about 320nm, about 340nm, reaches about 380nm in the liquid crystal layer.In a specific embodiment, first thickness d 1 is about 2.3 μ m between about 2.4 μ m, second thickness d 2 be about 2.4 μ m between about 2.5 μ m, the 3rd thickness d 3 is that about 2.7 μ m are extremely between about 2.8 μ m.
In another embodiment, base material 110 is the birefringence base material, and the Δ n * d of base material is about 100nm.In this embodiment, first thickness d 1 of liquid crystal layer is about 1.6 μ m between about 1.7 μ m, second thickness d 2 be about 1.7 μ m between about 1.8 μ m, the 3rd thickness d 3 is that about 2.0 μ m are extremely between about 2.1 μ m.
In addition, liquid crystal layer 120 can be directed against the LCD of different kenels, and by the different kenels of forming.For example, if optical compensation films 100 is applied to the LCD of TN (Twist Nematic) kenel or is applied to the LCD of VA (Vertical Alignment) kenel, liquid crystal layer 120 comprises A plate (A-plate) and C plate (C-plate).Above-mentioned A plate and C plate all have the uniaxiality optical anisotropy, and the optical axis of A plate is parallel to the extended surface of layer body, and the optical axis of C plate is perpendicular to the extended surface of layer body.
In another embodiment, optical compensation films 100 more comprises alignment film 130 between base material 110 and liquid crystal layer 120, as shown in Figure 2.Alignment film 130 is in abutting connection with liquid crystal layer 120, in order to the directivity orientation of 120 palpuses of liquid crystal layer to be provided.Alignment film 130 roughly forms along the surface of base material 110, so liquid crystal layer 120 also has a plurality of different thickness.
According to another object of the present invention, be to provide a kind of method of making optical compensation films.Fig. 3 illustrates the process flow diagram of the optical compensation film manufacturing method 200 of an embodiment of the present invention.
In step 210, but on base material, form the ultraviolet light hard resin-layer.But the method that forms the ultraviolet light hard resin-layer can for example be slot coated method (slit coating), drum-type rubbing method (roller coating) or die type rubbing method (Die coating) etc.But behind coating ultraviolet light hard resin-layer on the base material, optionally carry out drying steps, to remove solvent wherein.Above-mentioned ultraviolet light-curable resin material before UV-irradiation, has suitable flowability.But after UV-irradiation, sclerosis will take place and have a certain rigidity.According to the embodiment of the present invention, for ultraviolet light-curable resin material chosen, be preferably this ultraviolet light-curable resin material visible light is had suitable penetrance.
In step 220, but with object coining ultraviolet light hard resin-layer, to form microstructured layers.In one embodiment, but be by the above-mentioned ultraviolet light hard resin-layer of cylinder roll extrusion.The surface of cylinder is formed with specific concave-convex micro-structure, but by the roll extrusion step the concavo-convex profile on the cylinder is transferred on the ultraviolet light hard resin-layer, and forms microstructured layers.Particularly, microstructured layers has the convex-concave profile complementary with the concavo-convex profile of cylinder, and makes microstructured layers have first height and second height, and first highly is different from this second height.
In step 230,, make the microstructured layers sclerosis with the UV-irradiation microstructured layers.Ultraviolet light wavelength and irradiation time can be according to the kind adjustment of material.After the microstructured layers sclerosis, but non-essential ground carries out alignment manufacture process to the microstructured layers after hardening, and for example can carry out known round brush processing procedure (rubbing process), in order to the liquid crystal alignment in the subsequent step.Perhaps, in the microstructured layers after-hardening, but non-essential ground forms both alignment layers on the microstructured layers after the sclerosis, again both alignment layers is carried out the orientation program subsequently, and in this embodiment, the orientation step can for example be light orientation (Photo Alignment) method.
In step 240, form the microstructured layers top of liquid crystal layer in sclerosis.The mode that forms liquid crystal layer can for example be slot coated method (slit coating) or other appropriate method.In one embodiment, the fluid that will contain liquid crystal molecule is coated on the microstructured layers of sclerosis, carries out hot processing procedure subsequently again, to form above-mentioned liquid crystal layer.
Another purpose according to the present invention is to disclose a kind of optical compensation films that is applied to display panels.This optical compensation films comprises base material 110, microstructured layers (that is Fig. 1 illustrate surface micro-structure 112) and liquid crystal layer 120.Microstructured layers is formed on the surface of base material 110, and microstructured layers comprises a plurality of first microstructures 114 and a plurality of second microstructure 116.First microstructure 114 and second microstructure 116 are ordered on the base material 110, and each first microstructure 114 is in abutting connection with at least one second microstructure 116.Moreover, the thickness of each first microstructure 114 is greater than the thickness of any one second microstructure 116.Liquid crystal layer 120 covers on the microstructured layers.Liquid crystal layer 120 has first thickness d 1 and second thickness d 2 respectively above first microstructure 114 and above second microstructure 116, and first thickness d 1 is less than second thickness d 2.
Though the present invention discloses as above with embodiment; Right its is not in order to limiting the present invention, anyly has the knack of this art, do not breaking away from the spirit and scope of the present invention; When can doing various changes and retouching, so protection scope of the present invention is as the criterion when looking the claim person of defining.
Claims (10)
1. optical compensation films is characterized in that comprising:
Base material; And
Liquid crystal layer is disposed on this base material, and this liquid crystal layer has first thickness and second thickness to define first area and second area respectively, and wherein this second area is in abutting connection with this first area, and this second thickness is greater than this first thickness.
2. optical compensation films as claimed in claim 1 is characterized in that this base material has surface micro-structure, and this surface micro-structure is positioned at the side of this base material in abutting connection with this liquid crystal layer.
3. optical compensation films as claimed in claim 2; It is characterized in that this surface micro-structure comprises first microstructure and second microstructure; This first microstructure and this second microstructure lay respectively at this first area and this second area below, and the thickness of this first microstructure is greater than the thickness of this second microstructure.
4. optical compensation films as claimed in claim 2 is characterized in that this surface micro-structure is that the ultraviolet light-curable resin is made.
5. optical compensation films as claimed in claim 1 is characterized in that comprising alignment film, and this alignment film is between this base material and this liquid crystal layer, and this alignment film is in abutting connection with this liquid crystal layer.
6. optical compensation films as claimed in claim 1 is characterized in that this liquid crystal layer has the 3rd thickness to define the 3rd zone, and the 3rd zone is in abutting connection with this second area, and the 3rd thickness is greater than this second thickness.
7. optical compensation films as claimed in claim 6 is characterized in that this base material is the birefringence base material, and this first thickness is between 1.6 μ m to the 1.7 μ m, and second thickness is between 1.7 μ m to the 1.8 μ m, and the 3rd thickness is between 2.0 μ m to the 2.1 μ m.
8. optical compensation films as claimed in claim 6 is characterized in that this base material is tropism's base materials such as optics, and this first thickness is between 2.3 μ m to the 2.4 μ m, and second thickness is between 2.4 μ m to the 2.5 μ m, and the 3rd thickness is between 2.7 μ m to the 2.8 μ m.
9. optical compensation films is characterized in that comprising:
Base material;
Microstructured layers; Be formed on the surface of this base material; This microstructured layers comprises a plurality of first microstructures and a plurality of second microstructure; These a plurality of first microstructures and this a plurality of second microstructures are ordered on this base material; And each this first microstructure is in abutting connection with at least one this second microstructure, and wherein the thickness of each this first microstructure is greater than the thickness of each this second microstructure; And
Liquid crystal layer covers this microstructured layers, and wherein this liquid crystal layer has first thickness and second thickness respectively above these a plurality of first microstructures and above these a plurality of second microstructures, and this first thickness is less than this second thickness.
10. method of making optical compensation films is characterized in that comprising:
But form the ultraviolet light hard resin-layer on base material;
But with this ultraviolet light hard resin-layer of object coining, to form microstructured layers, wherein this microstructured layers has first height and second height, and this first highly is different from this second height;
With this microstructured layers of UV-irradiation, make this microstructured layers sclerosis; And
Form liquid crystal layer this microstructured layers top in sclerosis.
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| CN201110252268A CN102305956A (en) | 2011-08-30 | 2011-08-30 | Optical compensation film and manufacturing method thereof |
| CN201210167037.4A CN102768379B (en) | 2011-08-30 | 2012-05-28 | Optical compensation film and production method thereof |
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| CN1725066A (en) * | 2004-07-21 | 2006-01-25 | 力特光电科技股份有限公司 | Optical compensation film and its manufacturing method |
| CN100483191C (en) * | 2004-08-25 | 2009-04-29 | 鸿富锦精密工业（深圳）有限公司 | Semi-penetration and semi-reflective liquid crystal display device |
| RU2456651C2 (en) * | 2008-03-13 | 2012-07-20 | Шарп Кабусики Кайся | Liquid crystal display |
| JP4547641B2 (en) * | 2008-09-22 | 2010-09-22 | ソニー株式会社 | Production method of retardation plate |
| JP2010224245A (en) * | 2009-03-24 | 2010-10-07 | Toppan Printing Co Ltd | Color filter substrate, liquid crystal display device, and manufacturing method thereof |
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Application publication date: 20120104 |