CN101158778A - Wide vision cornea and LCD device using the same - Google Patents
Wide vision cornea and LCD device using the same Download PDFInfo
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- CN101158778A CN101158778A CNA2007101903072A CN200710190307A CN101158778A CN 101158778 A CN101158778 A CN 101158778A CN A2007101903072 A CNA2007101903072 A CN A2007101903072A CN 200710190307 A CN200710190307 A CN 200710190307A CN 101158778 A CN101158778 A CN 101158778A
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Abstract
The invention relates to a wide visual angle film and an LCD device using the wide visual angle film, which comprises a first euphotic zone with a first refractive index n<SUB>1</SUB>, one side surface of the first euphotic zone is provided with a plurality of protrudings; a second euphotic zone with a second refractive index n<SUB>2</SUB>, the second refractive index n<SUB>2</SUB> is different from the first refractive index n <SUB>1</SUB>, one side surface of the second euphotic zone is provided with grooves fully jointed with a plurality of protruding surfaces; wherein, the light with incidence angle Alpha drills through the first euphotic zone, passes a joint part of the protruding and the groove, and comes out from the second euphotic zone. The wide visual angle film and the LCD device using the wide visual angle film can effectively solve the gray inversion problems of the traditional technologies, provide a whole viewing angle display, and the even display effect can be seen within the whole viewing angle (comprises even chroma and contrast, etc.).
Description
Technical field
The present invention relates to a kind of view film and the liquid crystal indicator of using this view film, the especially a kind of film and the liquid crystal indicator of using this kind film that can eliminate the gray inversion phenomenon and the expansion visual angle of full visual angle demonstration is provided.
Background technology
Display device can be expressed the electric signal that digital processing element produces to the user with forms such as figure, literal, numerals intuitively as a kind of medium.Display device can be divided into numeric display unit and analog display unit according to type of drive, and LCD (liquid crystal indicator) is typical numeric display unit, and CRT (cathode-ray tube (CRT)) type display device is typical analog display unit.Along with the development of LCD technology, LCD can realize large scale screen, high-res, and compares CRT escope device and have little, the lightweight advantage of volume, thereby LCD is applied on the display device of household electrical appliance, public place widely.
Yet well-known, there is anisotropy in existing macromolecular compound as liquid crystal material, and this has just determined the difference of liquid crystal molecule space distribution, and different three-dimensional viewpoin light transmission rate differences causes the contrast of display degree inhomogeneous.And the optimal display result of liquid crystal cell designs according to vertical incidence light, so in display effect the best of vertical direction, off-normal is far away more, contrast descends serious more, even dark attitude transmitance might appear greater than bright attitude transmitance, the phenomenon of gray inversion takes place.
In order to enlarge the visual angle of LCD, a kind of traditional technical measures are to paste light-diffusing film and luminosity compensation film on LCDs, make by the even diffusion of the light of liquid crystal display, and compensate the light intensity of some angle.This method is simple to operate, yield rate is very high, but for contrast decline phenomenon to improve effect more limited.
Application number is " CN02819517.5's " " transmission type lcd device " patent of invention, a kind of " optical compensating sheet " that is arranged between the polaroid disclosed, should " optical compensating sheet " comprise a transparent carrier and an optical anisotropic layer, this optical anisotropic layer contains a kind of dish type compound with dish type plane, the angle tilt that this dish type plane changes with the depth direction along optical anisotropic layer from a surface of carrier surface.In actual production, should " optical compensating sheet " can effectively solve the dark attitude stravismus light leak problem of LCD, and reach the purpose of wide viewing angle.Yet this technology still comes with some shortcomings: (1) still can not avoid the problem of gray inversion; (2) at different direction of observations, brightness and colourity difference are big, lack of homogeneity; (3) angular field of view of Zeng Jiaing is limited, and the horizontal view angle is ± 60 °, and still there is the phenomenon of gray inversion in downwards angle of visibility.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art and provides a kind of and can solve the gray inversion problem of conventional art and realize the view film that full visual angle shows.
For achieving the above object, the technical solution used in the present invention is: a kind of view film that is applied to liquid crystal indicator comprises: have first refractive index n
1First photic zone, described first an euphotic side surface has a plurality of projectioies; Has second refractive index n
2Second photic zone, described second refractive index n
2With described first refractive index n
1Inequality, described second an euphotic side surface has the groove that engages fully with described a plurality of convex surfaces; Wherein, after the light with incident angle α passed described first photic zone, the junction surface through described projection and described groove passed from described second photic zone.
Described first refractive index n
1With described second refractive index n
2Between have difference and get final product, the difference between the two is scope between 0.1 to 2.5 preferably.
The scope of described incident angle α is between 0 ° to 20 °.
Described a plurality of convex surfaces and engaging of described a plurality of groove surfaces are that the molecular force by storeroom fits.The profile of described projection is round table-like or positive six terrace with edge shape or ribbons, and the side of described projection is between 0 ° to 180 ° with respect to the angle of inclination beta scope of bottom surface, and the altitude range of described projection is between 0.1 micron to 100 microns.The transition of the bottom surface of described projection and the transition of side, end face and side is round-corner transition.
Be fitted with substrate layer on the described first euphotic opposite side surface.Be fitted with on the described second euphotic opposite side surface and have third reflect rate n
3Diffusion layer, described third reflect rate n
3With described second refractive index n
2Between have difference and get final product, the difference between the two is scope between 0.1 to 2.5 preferably.
In addition, the objective of the invention is to overcome the deficiencies in the prior art and provide a kind of and can solve the gray inversion problem of conventional art and realize the liquid crystal indicator that full visual angle shows.
For achieving the above object; the technical solution used in the present invention is: a kind of liquid crystal indicator; it comprises the backlight of fitting successively; first polaroid; liquid crystal cells; second polaroid; described second polaroid comprises the bonding coat of bonding successively; second supporting layer; polarizing layer; first supporting layer; protective seam; described bonding coat and described liquid crystal cells all have incident light one side surface and emergent light one side surface respectively; incident light one side surface of described bonding coat is fitted on emergent light one side surface of described liquid crystal cells; be fitted with above-mentioned view film between described first supporting layer and the described protective seam, and first photic zone of described view film is pressed close to described first supporting layer; second photic zone of described view film is pressed close to described protective seam.
In addition, the present invention also aims to overcome the deficiencies in the prior art and the gray inversion problem that another kind can solve conventional art is provided and realizes the liquid crystal indicator that full visual angle shows.
For achieving the above object, the technical solution used in the present invention is: a kind of liquid crystal indicator, it comprises backlight, first polaroid, liquid crystal cells, the 3rd polaroid of fitting successively, described the 3rd polaroid has incident light one side surface and emergent light one side surface, emergent light one side surface of described the 3rd polaroid is fitted with above-mentioned view film, and first photic zone of described view film is pressed close to emergent light one side surface of described the 3rd polaroid.
Because technique scheme utilization, the present invention compared with prior art has following advantage: this view film and the liquid crystal indicator of using this view film, can effectively solve the gray inversion problem in the conventional art, provide full visual angle to show, and in full angular field of view, can see uniform display effect (comprising uniform colourity and contrast etc.).
Description of drawings
Fig. 1 looks complete section figure for view film master of the present invention;
Fig. 2 is the light path principle figure of Fig. 1 of the present invention;
Fig. 3 implements illustration for first of Fig. 1 of the present invention;
Fig. 4 implements illustration for second of Fig. 1 of the present invention;
Fig. 5 implements illustration for the 3rd of Fig. 1 of the present invention;
Fig. 6 is the second polaroid schematic diagram of application drawing 1 view film of the present invention;
Fig. 7 is the schematic diagram of the liquid crystal indicator of a kind of application drawing 1 view film of the present invention;
Fig. 8 is the schematic diagram of the liquid crystal indicator of another kind of application drawing 1 view film of the present invention.
Wherein, 100, view film, 200, substrate layer, 300, first photic zone, 301, projection, 400, second photic zone, 401, groove, 500, diffusion layer,
101, protective seam, 102, first adhering agent layer, 103, second adhering agent layer, 104, first supporting layer, 105, polarizing layer, 106, second supporting layer, the 107, the 3rd adhering agent layer, 108, bonding coat, 109, second polaroid,
110, liquid crystal cells, 111, first polaroid, 112, backlight, the 113, the 3rd polaroid, the 114, the 4th adhering agent layer.
Embodiment
Below the specific embodiment of the present invention is described:
Referring to Fig. 1, a kind of view film 100 that is applied to liquid crystal indicator comprises:
Has first refractive index n
1First photic zone 300, a side surface of described first photic zone 300 has a plurality of protruding 301; Has second refractive index n
2Second photic zone 400, described second refractive index n
2With described first refractive index n
1Inequality, a side surface of described second photic zone 400 has the groove 401 that engages fully with described a plurality of protruding 301 surfaces; Wherein, after the light with incident angle α passes described first photic zone 300, through described protruding 301 with the junction surface of described groove 401, pass from described second photic zone 400.
In order to make light path better reflect described first refractive index n during with the junction surface of described groove 401 through described protruding 301
1With described second refractive index n
2As long as variant, in the embodiment of reality, the difference between the two is preferably in scope between 0.1 to 2.5.
Described incident angle α (as shown in Figure 2) is meant the angle between the normal direction of incident ray and display plane, consider actual application scenario, the scope of described incident angle α is between 0 ° to 20 °, the angular field of view that promptly incides the light of described first photic zone 300 is ± 20 °, and described view film 100 should design with reference to this incident angle α scope.
Described a plurality of protruding 301 surfaces are that molecular force by storeroom fits with engaging of described a plurality of grooves 401 surfaces, perhaps also can be with the two close adhesion by bonding agent.Described first photic zone 300 constitutes by having the material of fluent material with the two kinds of attributes of solidification material of having ready conditions, and can fully fit with described second photic zone 400 surfaces; Described second photic zone 400 is the film with hardness, can keep the shape of described view film 100.
Certainly, also there is another kind of juncture between described protruding 301 surfaces and described groove 401 surfaces, promptly be not to engage fully between two surfaces, but having certain space, deviation takes place on described protruding 301 surfaces, passes described space, incides described groove 401 surfaces and on described groove 401 surfaces deviation takes place after described protruding 301 surperficial outgoing in light path.This juncture also can be realized the deviation to light path, yet has a very big drawback, and space processing difficulties and size between promptly described protruding 301 surfaces and described groove 401 surfaces are difficult to control, poor practicability.
Referring to Fig. 3, Fig. 4, Fig. 5, described protruding 301 profile is round table-like or positive six terrace with edge shape or ribbons, wherein round table-like, positive six terrace with edge shapes can expand the visual angle to each view directions, ribbon mainly is to expand the visual angle to the view directions perpendicular with broadside, and these view directions can obtain bigger brightness.Described protruding 301 side is between 0 ° to 180 ° with respect to the angle of inclination beta scope of bottom surface, and described protruding 301 altitude range is between 0.1 micron to 100 microns.
The transition of transition, end face and the side of described protruding 301 bottom surface and side is round-corner transition, so that the light path more uniform diffusion.
Be fitted with substrate layer 200 on the opposite side surface of described first photic zone 300, can protect described first photic zone 300, and convenient described view film 100 is fitted to other parts get on.
Be fitted with on the opposite side surface of described second photic zone 400 and have third reflect rate n
3Diffusion layer 500, the distribution in uneven thickness on the opposite side surface of described second photic zone 400 of described diffusion layer 500.Described third reflect rate n
3With described second refractive index n
2Between there are differences and get final product, the difference between the two is scope between 0.1 to 2.5 preferably, described diffusion layer 500 is with further evenly diffusion of light path, the visual angle that can increase described view film 100 enlarges effect.
Referring to Fig. 2, the light path principle of view film 100 of the present invention is explained as follows.Light path incides described first photic zone 300 from described substrate layer 200 outgoing with the incident angle α between 0 ° to 20 °; Because described first photic zone 300 has different refractive indexes with described second photic zone 400, so deviation from 300 outgoing of described first photic zone, can take place at the junction surfaces on described protruding 301 surfaces and described groove 401 surfaces when inciding described second photic zone 400 in light path; Through the light path of deviation for the first time from 400 outgoing of described second photic zone, when inciding described diffusion layer 500, because described second photic zone 400 has different refractive indexes with described diffusion layer 500, so deviation can take place again at the junction surface of described second photic zone 400 and described diffusion layer 500 in light path; Through the light path of twice deviation during from described diffusion layer 500 outgoing; if described diffusion layer 500 with and its object of engaging (gases such as solid such as protective seam, bonding coat or air) when having different refractive indexes, deviation for the third time will take place at the junction surface of the two in light path.Why to make the structure of concavo-convex mutual embedding between described first photic zone 300 and described second photic zone 400 but not plane engagement, why described diffusion layer 500 will be made in uneven thickness but not the thickness uniform shape, all be for make between two surfaces that are in contact with one another (between described first photic zone 300 and described second photic zone 400 or described diffusion layer 500 with and its object of engaging between) have many normal directions, even so direction originally more single light path (scope of incident angle α is between 0 ° to 20 °) also can between the surface that is in contact with one another, obtain multidirectional to greatest extent deviation, this also is of the present inventionly will put the place.
Referring to Fig. 7, a kind of liquid crystal indicator, it comprises backlight 112, first polaroid 111, liquid crystal cells 110, second polaroid 109 of fitting successively.The structure of described second polaroid 109 is referring to Fig. 6; it comprises bonding coat 108, second supporting layer 106, polarizing layer 105, first supporting layer 104, the protective seam 101 of bonding successively, and is bonding by the 3rd adhering agent layer 107 between described bonding coat 108 and described second supporting layer 106.Described bonding coat 108 has incident light one side surface 108a and emergent light one side surface 108b, and described liquid crystal cells 110 also has incident light one side surface 110a and emergent light one side surface 110b.The incident light one side surface 108a of described bonding coat 108 is fitted on the emergent light one side surface 110b of described liquid crystal cells 110.
Wherein, described supporting layer (first supporting layer 104 and second supporting layer 106) is meant triacetate fiber layer (english abbreviation is TAC), can support, protect and prevent retraction to described polarizing layer 105; Described polarizing layer 105 is meant the polyvinyl alcohol layer (english abbreviation is PVA) with polarisation mechanism; Described bonding coat 108 is meant acrylate resin layer (english abbreviation is PSA), is used for bonding between described liquid crystal cells 110 and described second polaroid 109.
First photic zone 300 that is fitted with above-mentioned view film 100. and described view film 100 between described first supporting layer 104 and the described protective seam 101 is pressed close to second photic zone 400 of described first supporting layer 104, described view film 100 and is pressed close to described protective seam 101.Bonding between described view film 100 and described first supporting layer 104 by second adhering agent layer 103, bonding between described view film 100 and the described protective seam 101 by first adhering agent layer 102.
In the actual production manufacture process, with described view film 100 sticking being pressed onto in described second polaroid 109, the existing relatively liquid crystal indicator of other production procedure is constant, can produce the liquid crystal indicator that full visual angle shows with the flow process of simplifying.
The light path principle of this liquid crystal indicator is: light outgoing from described backlight 112; pass described first polaroid 111 and described liquid crystal cells 110; emergent light one side surface 110b outgoing from described liquid crystal cells 110; incide the incident light one side surface 108a of the bonding coat 108 of described second polaroid 109; pass described bonding coat 108; second supporting layer 106; polarizing layer 105; first supporting layer 104; light path is passed described view film 100 again and is obtained the wide viewing angle deviation herein and be diffused into all directions, and last light path is from described protective seam 101 outgoing.
Referring to Fig. 8, another liquid crystal indicator, it comprises the backlight 112 of fitting successively, first polaroid 111, liquid crystal cells 110, the 3rd polaroid 113, described the 3rd polaroid 113 has incident light one side surface 113a and emergent light one side surface 113b, the emergent light one side surface 113b of described the 3rd polaroid 113 is fitted with above-mentioned view film 100, first photic zone 300 of described view film 100 is pressed close to the emergent light one side surface 113b of described the 3rd polaroid 113, and bonding by the 4th adhering agent layer 114 between the emergent light one side surface 113b of described view film 100 and described the 3rd polaroid 113.
In the actual use, the 3rd polaroid 113 emergent lights one side surface 113b at existing liquid crystal indicator, get on described view film 100 is bonding with described the 4th adhering agent layer 114, the full visual angle of original liquid crystal indicator is shown, do not destroy existing product, technology is simple, effect is remarkable.Compare existing liquid crystal indicator, light path is outgoing from described backlight 112 still, pass described first polaroid 111, liquid crystal cells 110, the 3rd polaroid 113, incide described view film 100 from described the 3rd polaroid 113 emergent lights one side surface 113b and also obtain the wide viewing angle deviation herein and be diffused into all directions, constituted the light path principle that the visual angle enlarges the liquid crystal indicator of feature that has of the present invention.
In sum, though the present invention with the preferred embodiment disclosure as above, yet it is not in order to limit the present invention.The technical field of the invention those of ordinary skill without departing from the spirit and scope of the present invention, should carry out various equivalent substitutions and modifications.Therefore, protection scope of the present invention should be as the criterion with the appended scope that claim was defined.
Claims (10)
1. view film that is applied to liquid crystal indicator is characterized in that comprising:
Has first refractive index n
1First photic zone, described first an euphotic side surface has a plurality of projectioies;
Has second refractive index n
2Second photic zone, described second refractive index n
2With described first refractive index n
1Inequality, described second an euphotic side surface has the groove that engages fully with described a plurality of convex surfaces;
Wherein, after the light with incident angle α passed described first photic zone, the junction surface through described projection and described groove passed from described second photic zone.
2. view film according to claim 1 is characterized in that: described first refractive index n
1With described second refractive index n
2Between difference scope between 0.1 to 2.5.
3. view film according to claim 1 and 2 is characterized in that: the scope of described incident angle α is between 0 ° to 20 °.
4. view film according to claim 3 is characterized in that: described a plurality of convex surfaces and engaging of described a plurality of groove surfaces are that the molecular force by storeroom fits.
5. view film according to claim 3, it is characterized in that: the profile of described projection is round table-like or positive six terrace with edge shape or ribbons, the side of described projection is between 0 ° to 180 ° with respect to the angle of inclination beta scope of bottom surface, and the altitude range of described projection is between 0.1 micron to 100 microns.
6. view film according to claim 3 is characterized in that: the transition of the bottom surface of described projection and the transition of side, end face and side is round-corner transition.
7. view film according to claim 3 is characterized in that: be fitted with substrate layer on the described first euphotic opposite side surface.
8. view film according to claim 3 is characterized in that: be fitted with on the described second euphotic opposite side surface and have third reflect rate n
3Diffusion layer, described third reflect rate n
3With described second refractive index n
2Between difference between 0.1 to 2.5.
9. liquid crystal indicator; it comprises the backlight of fitting successively; first polaroid; liquid crystal cells; second polaroid; described second polaroid comprises the bonding coat of bonding successively; second supporting layer; polarizing layer; first supporting layer; protective seam; described bonding coat and described liquid crystal cells all have incident light one side surface and emergent light one side surface respectively; incident light one side surface of described bonding coat is fitted on emergent light one side surface of described liquid crystal cells, it is characterized in that: be fitted with the view film according to claim 1 record between described first supporting layer and the described protective seam.
10. liquid crystal indicator, it comprises backlight, first polaroid, liquid crystal cells, the 3rd polaroid of fitting successively, described the 3rd polaroid has incident light one side surface and emergent light one side surface, it is characterized in that: emergent light one side surface of described the 3rd polaroid is fitted with the view film according to claim 1 record.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101903072A CN101158778A (en) | 2007-11-14 | 2007-11-14 | Wide vision cornea and LCD device using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101903072A CN101158778A (en) | 2007-11-14 | 2007-11-14 | Wide vision cornea and LCD device using the same |
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| Publication Number | Publication Date |
|---|---|
| CN101158778A true CN101158778A (en) | 2008-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101903072A Pending CN101158778A (en) | 2007-11-14 | 2007-11-14 | Wide vision cornea and LCD device using the same |
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| WO2020062558A1 (en) * | 2018-09-30 | 2020-04-02 | 惠科股份有限公司 | Polarizing structure and display device |
| US11209694B2 (en) * | 2018-09-30 | 2021-12-28 | HKC Corporation Limited | Polarizing structure and display device |
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