CN101377587A - Liquid crystal display device and optical film - Google Patents
Liquid crystal display device and optical film Download PDFInfo
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- CN101377587A CN101377587A CNA2007101459698A CN200710145969A CN101377587A CN 101377587 A CN101377587 A CN 101377587A CN A2007101459698 A CNA2007101459698 A CN A2007101459698A CN 200710145969 A CN200710145969 A CN 200710145969A CN 101377587 A CN101377587 A CN 101377587A
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Abstract
The invention provides an optical film and a liquid crystal display device. The liquid crystal display device comprises a twisted nematic liquid crystal display panel and a backlight module. The liquid crystal display panel comprises a lower polarizing plate, a liquid crystal layer unit and an upper polarizing plate. The liquid crystal layer unit is arranged between the lower polarizing plate and the upper polarizing plate. In addition, the backlight module comprises a reflection type polarizing film and a half-wave plate which is positioned above the reflection type polarizing film. The principal axis of the half-wave plate differs a first angle from the transmission axis of the lower polarizing plate, the transmission axis of the reflection type polarizing film differs a second angle from the transmission axis of the lower polarizing plate, and the first angle is half of the second angle.
Description
Technical field
What the present invention relates to is a kind of liquid crystal display, particularly be a kind of LCD and optical thin film about having 1/2nd ripple plates.
Background technology
In recent years, traditional cathode-ray tube display (CRT monitor that promptly is commonly called as) is replaced by LCD gradually, main cause is that the radiant quantity that LCD discharges is far smaller than CRT monitor, and LCD also shows the reduction that lands in this manufacturing cost in several years.In general, LCD comprises backlight module and liquid crystal panel two large divisions, and the main function of backlight module is to provide the light source liquid crystal display to use.
Please refer to Fig. 1, Fig. 1 is the synoptic diagram of existing LCD.This LCD 1000 comprises a backlight module 1100 and a liquid crystal panel 1200, and backlight module 1100 comprises: a housing 1110, a plurality of fluorescent tube 1120, a diffuser plate 1130, a brightness enhancement film 1140 and a reflecting type polarizing diaphragm 1150.Wherein, fluorescent tube 1120 is to be configured in the groove 1112 of housing 1110, and the surface coated of this groove 1112 has the reflection material.Diffuser plate 1130 inside are doped with a plurality of diffusion particles, and brightness enhancement film 1140 tops then are provided with a plurality of water chestnut mirror structures 1142.In addition, liquid crystal panel 1200 comprises: once alignment film 1230 on Polarizer 1210 ' on the Polarizer 1210,, a lower glass substrate 1220, the top glass substrate 1220 ',, once an alignment film 1230 ' and a liquid crystal layer 1240.
Because the surface coated of groove 1112 has the reflection material, the light meeting concentrated area that fluorescent tube 1120 is launched is towards diffuser plate 1130 incidents, and the diffusion particles in the diffuser plate 1130 then can make incident light fill a part mixing, and make brightness better evenly.In addition, be configured in 1142 effects that optically focused is arranged of water chestnut mirror structure on the brightness enhancement film 1140.Reflecting type polarizing diaphragm 1150 is positioned at brightness enhancement film 1140 tops, pass described reflecting type polarizing diaphragm 1150 with the polarization luminous energy of the penetrating shaft equidirectional of reflecting type polarizing diaphragm 1150, formula polarisation diaphragm 1150 reflections that then can be reflected of the polarized light of all the other directions.
At stable twisted nematic (Twisted Nematic, be commonly called as TN) liquid crystal panel 1200 in, the direction of the penetrating shaft of following Polarizer 1210 must with the penetrating shaft of reflecting type polarizing diaphragm 1150 in the same way, so just can make the polarized light of penetrating reflective polarisation diaphragm 1150 also can pass down Polarizer 1210.In addition, 1240 of liquid crystal layers are to be formed by multilayer liquid crystal molecule institute superposition, and the orientation that is positioned at the superiors and undermost liquid crystal molecule then can be pressed from both sides an angle with the side of alignment film 1230 '.
In addition, in general, what the direction of following Polarizer 1210 and the penetrating shaft of reflecting type polarizing diaphragm 1150 can be along with the kind of liquid crystal panel is different and different.For example, at stable twisted nematic (Twisted Nematic, be commonly called as TN) liquid crystal panel 1200 in, the folded angle of the direction of following Polarizer 1210 and the penetrating shaft of reflecting type polarizing diaphragm 1150 and the dual-side of following Polarizer 1210 is 45 0 (if descending the squares that are shaped as of Polarizer 1210).Yet if in the liquid crystal panel of vertical orientation type (Vertical Alignment is commonly called as VA), the direction of the penetrating shaft of following Polarizer and reflecting type polarizing diaphragm is parallel to each other with the dual-side of following Polarizer.
At present, the production method of reflecting type polarizing diaphragm 1150 is after producing a former diaphragm earlier, to cut again, to produce piecemeal reflecting type polarizing diaphragm 1150.Then, please refer to Fig. 2 A, Fig. 2 A illustrate cuts into the mode of reflecting type polarizing diaphragm for former diaphragm.The direction of the penetrating shaft of former diaphragm 10 is X1, because in the reflecting type polarizing diaphragm 1150 of the liquid crystal panel of vertical orientation type, the direction X2 of penetrating shaft is parallel with a wherein side directions of reflecting type polarizing diaphragm 1150, therefore only need cut, can obtain the reflecting type polarizing diaphragm of being desired 1150 along the dotted line among Fig. 2 A.
Yet, please refer to Fig. 2 B, Fig. 2 B illustrate cuts into the another kind of mode of reflecting type polarizing diaphragm for former diaphragm.Because in the reflecting type polarizing diaphragm of the liquid crystal panel of stable twisted nematic, a wherein side directions of the direction X2 of penetrating shaft and reflecting type polarizing diaphragm 1150 presss from both sides 45 0, thus cut direction also the side of need and former diaphragm 10 press from both sides 45 0.Yet, thus, cut finish after, also can produce some waste materials (also promptly, beating the part of " * " among Fig. 2 B).So, how when cutting the reflecting type polarizing diaphragm, to reduce the generation of waste material, be to be worth this area to have to know that usually the knowledgeable goes to consider ground.
Summary of the invention
The purpose of this invention is to provide a kind of LCD and optical thin film, the formation of described LCD can make the reflecting type polarizing diaphragm when making, and reduces the generation of waste material.
According to above-mentioned purpose and other purpose, the invention provides a kind of LCD, this LCD comprises a torsion nematic liquid crystal display panel and a backlight module.This torsion nematic liquid crystal display panel comprises Polarizer on Polarizer, the liquid crystal layer unit and, and described liquid crystal layer configuration of cells is down between Polarizer and the last Polarizer.In addition, backlight module comprises a reflecting type polarizing diaphragm and 1/1st ripple plate (Half-waveplate), this 1/2nd ripples plate is the top that is positioned at the reflecting type polarizing diaphragm, the main shaft of described 1/2nd ripple plates (princeple axis, can be subdivided into fast axle and slow axis again) differ one first angle with the penetrating shaft (transmission axis) of following Polarizer, and the penetrating shaft of the penetrating shaft of reflecting type polarizing diaphragm and following Polarizer differs one second angle, and wherein first angle is half of second angle.
In above-mentioned stable twisted nematic LCD, second angle is π/4.
In above-mentioned stable twisted nematic LCD, 1/2nd ripple plates are to be formed by N 1/2N ripple plate institute superposition, wherein N=2 or 4.
In above-mentioned stable twisted nematic LCD, the penetrating shaft of the penetrating shaft of last Polarizer and following Polarizer is orthogonal each other.
According to above-mentioned purpose and other purpose, the present invention provides a kind of optical thin film again, and this optical thin film is installed in the display panels, and described display panels has Polarizer.Above-mentioned optical thin film comprises: a reflecting type polarizing diaphragm and 1/1st ripple plate.This 1/2nd ripples plate is positioned at the top of reflecting type polarizing diaphragm, the main shaft of this 1/2nd ripples plate differs one first angle with the penetrating shaft of following Polarizer, and the penetrating shaft of the penetrating shaft of reflecting type polarizing diaphragm and following Polarizer differs one second angle, and wherein first angle is half of second angle.
Because light is by behind 1/2nd ripple plates, it is identical with the direction of the penetrating shaft of following Polarizer that its polarization direction can become, so compare and having now, and the penetrating shaft of reflecting type polarizing diaphragm need not to remain on identical direction with the penetrating shaft of following Polarizer.Also therefore, when the reflecting type polarizing diaphragm that making stable twisted nematic liquid crystal panel is used, its mode of cutting can be identical with the mode shown in Fig. 2 A, thus can not produce the problem of waste material, thus reduce cost.
Description of drawings
Fig. 1 is the synoptic diagram of existing LCD;
Fig. 2 A is the mode that former diaphragm cuts into the reflecting type polarizing diaphragm;
Fig. 2 B is the another kind of mode that former diaphragm cuts into the reflecting type polarizing diaphragm;
Fig. 3 is the reciprocation figure between 1/2nd ripple plates and light;
Fig. 4 is the synoptic diagram of the LCD of present embodiment;
Fig. 5 is the location diagram of following diffuser plate, last diffuser plate, liquid crystal cells, reflecting type polarizing diaphragm and 1/2nd ripple plates;
/ 2nd ripple plates of Fig. 6 A for forming by N 1/2N ripple plate institute superposition;
/ 2nd ripple plates of Fig. 6 B for forming by two quarter-wave plate superpositions;
/ 2nd ripple plates of Fig. 6 C for forming by four 1/8th ripple plate superpositions.
The former diaphragm of description of reference numerals: 10-; The 1000-LCD; The 1100-backlight module; The 1110-housing; The 1112-groove; The 1120-fluorescent tube; The 1130-diffuser plate; The 1140-brightness enhancement film; 1142-water chestnut mirror structure; 1150-reflecting type polarizing diaphragm; The 1200-liquid crystal panel; Polarizer under the 1210-; 1210 '-upward Polarizer; The 1220-lower glass substrate; 1220 '-top glass substrate; The last alignment film of 1230-; 1230 '-following alignment film; The 1240-liquid crystal layer; The direction of X1, X2-penetrating shaft; The 2000-LCD; The 2100-backlight module; The 2110-housing; The 2112-groove; The 2120-fluorescent tube; The 2130-diffuser plate; The 2140-brightness enhancement film; 2150-reflecting type polarizing diaphragm; 2160-1/2nd ripple plates; 2162-1/2N ripple plate; 2164-quarter-wave plate; 2166-1/8th ripple plates; The 2200-liquid crystal panel; The 2205-liquid crystal cells; Polarizer under the 2210-; 2210 '-upward Polarizer; The 2220-lower glass substrate; 2220 '-top glass substrate; The last alignment film of 2230-; 2230 '-following alignment film; The 2240-liquid crystal layer; The fast axle of F-; The S-slow axis; θ-angle; θ 1-first angle; θ 2-second angle; L, L0, L1, L2, L3, LF, LS-light; P0, P1, P2-penetrating shaft; A0, A1-vergence direction.
Embodiment
Below in conjunction with accompanying drawing, be described in more detail with other technical characterictic and advantage the present invention is above-mentioned.
In order to make following embodiment can also be easy to be understood, earlier the operation principles of 1/2nd ripple plates is done more detailed statement at this, so-called 1/2nd ripple plates are meant: when light passes 1/2nd ripple plates, can lack 1/2nd wavelength than the distance of being walked in the distance of being walked on the slow axis on fast axle.Please refer to Fig. 3, Fig. 3 is the reciprocation figure between 1/2nd ripple plates and light./ 2nd ripple plates 2160 are made of birefringent material (briefringent material), and so-called birefringent material is meant: polarization is its refractive index difference when the different main direction.And if the refractive index of polarization when a certain specific major axes orientation is less, the speed that light is advanced is very fast, and then this specific main shaft is called fast axle F again.In addition, the refractive index of polarization when the main shaft of vertical quick shaft direction is relatively large, and the speed that light is advanced is relatively slow, so vertical main shaft at quick shaft direction is called slow axis S again.As shown in Figure 3, if with fast axle F as axis of reference, the folded angle of the polarization direction of light L and fast axle F is θ, so the component LF of light L on fast axle F, and the component LS on slow axis S.Because the speed of light LF is fast than light LS, so when light L passed 1/2nd ripple plates 2160, light LF had walked the distance of 1/2nd wavelength X more than light LS.Also therefore, pass the folded angle of polarization direction and the fast axle F of light L of 1/2nd ripple plates 2160 and be-θ.Therefore, light L is after passing 1/2nd ripple plates 2160, and its polarization direction has rotated 2 θ.It should be noted that in addition if with slow axis S as axis of reference, also can obtain the result that proves of identical rotation twice angle.
See also Fig. 4, Fig. 4 is the synoptic diagram of the LCD of present embodiment.This LCD 2000 comprises a backlight module 2100 and a liquid crystal panel 2200, and this backlight module 2100 comprises: a housing 2110, a plurality of fluorescent tube 2120, a diffuser plate 2130, a brightness enhancement film 2140, a reflecting type polarizing diaphragm 2150 and 1/1st ripple plate 2160.Wherein, fluorescent tube 2120 is to be configured in the groove 2112 of housing 2110, and the surface coated of this groove 2112 has the reflection material.Diffuser plate 2130 inside are doped with a plurality of diffusion particles, and brightness enhancement film 2140 tops then are provided with a plurality of water chestnut mirror structures 2142.Reflecting type polarizing diaphragm 2150 is positioned at brightness enhancement film 2140 tops, reflecting type polarizing diaphragm 2150 mainly is to be formed by multilayer film institute superposition, pass described reflecting type polarizing diaphragm 2150 with the polarization luminous energy of the penetrating shaft equidirectional of reflecting type polarizing diaphragm 2150, formula polarisation diaphragm 2150 reflections that then can be reflected of the polarized light of all the other directions.
In addition, liquid crystal panel 2200 is the stable twisted nematic liquid crystal panel, and this liquid crystal panel 2200 comprises: once alignment film 2230 on Polarizer 2210 ' on the Polarizer 2210,, a lower glass substrate 2220, the top glass substrate 2220 ',, once an alignment film 2230 ' and a liquid crystal layer 2240.Wherein, lower glass substrate 2220, top glass substrate 2220 ', last alignment film 2230, following alignment film 2230 ' constitute liquid crystal layer unit (Liquid Cell) 2205 with liquid crystal layer 2240.
See also Fig. 5, Fig. 5 is the location diagram of following Polarizer, last Polarizer, liquid crystal cells, reflecting type polarizing diaphragm and 1/2nd ripple plates.As shown in Figure 5, the penetrating shaft P2 of last Polarizer 2210 ' and the penetrating shaft P1 of following Polarizer 2210 be orthogonal each other, also promptly differs 90 0.And in liquid crystal cells 2205, the orientation A1 of liquid crystal molecule that is positioned at the superiors is identical with the penetrating shaft P2 of last Polarizer 2210 ', and then the penetrating shaft P1 with following Polarizer 2210 is identical to be positioned at the vergence direction A0 of undermost liquid crystal molecule.
In addition, the fast axle F of 1/2nd ripple plates 2160 and the penetrating shaft P1 of following Polarizer 2210 differ one first angle θ 1, and the penetrating shaft P1 of the penetrating shaft P0 of reflecting type polarizing diaphragm 2150 and following Polarizer 2210 differs one second angle θ 2, and wherein the first angle θ 1 is half of the second angle θ 2.In the present embodiment, the second angle θ 2 is π/4, and the first angle θ 1 is π/8.
Passing through the effect of reflecting type polarizing diaphragm 2150 as the light L0 emitted after from fluorescent tube 2120 (as shown in Figure 3), the polarization direction light L2 identical with penetrating shaft P0 direction can pass reflecting type polarizing diaphragm 2150, and the light L1 different with the penetrating shaft P0 direction formula polarisation diaphragm 2150 that then can be reflected in polarization direction reflects.And, from Fig. 3 and related description as can be known, when light L2 by behind 1/2nd ripple plates 2160, its polarization direction can rotate 2 θ 1, also promptly rotate θ 2, and make the polarization direction of light L3 identical, so light L3 can pass down Polarizer 2210 and arrive liquid crystal cells 2205 with the direction of penetrating shaft P1.
Because light L2 is after passing through 1/2nd ripple plates 2160, can become the polarization direction light L3 identical with the direction of penetrating shaft P1, therefore compared to existing, the penetrating shaft P0 of reflecting type polarizing diaphragm 2150 need not to remain on identical direction with the penetrating shaft P1 of following Polarizer 2210.Also therefore, when the reflecting type polarizing diaphragm 2150 that making stable twisted nematic liquid crystal panel is used, its mode of cutting can be identical with the mode shown in Fig. 2 A, thus can not produce the problem of waste material, thus reduce cost.
In the above-described embodiment, the second angle θ 2 is π/4, and the first angle θ 1 is π/8.Yet, when the angle θ between the penetrating shaft P1 of the penetrating shaft P0 of reflecting type polarizing diaphragm 2150 and following Polarizer 2,210 2 changes, this area has knows that usually the knowledgeable also can adjust the angle θ 1 between the penetrating shaft P1 of the fast axle F of 1/2nd ripple plates 2160 and following Polarizer 2210, can pass down Polarizer 2210 so that pass the light of 1/2nd ripple plates 2160.
/ 2nd above-mentioned ripple plates 2160 can be made with integrated mode, also can form (as shown in Figure 6A) by 2162 superpositions of N 1/2N ripple plate, wherein N is a natural number, and 1/2N ripple plate is meant: when light passes 1/2N ripple plate, the distance of being walked on the slow axis can than on fast axle, walked apart from the 1/2N wavelength.Therefore, shown in Fig. 6 B, 1/2nd ripple plates 2160 can be formed by two quarter-wave plate 2164 superpositions, or can form (shown in Fig. 6 C) by four 1/8th ripple plate 2166 superpositions.
The present invention illustrates as above that with embodiment so it is not in order to limit the patent right scope that the present invention advocated.Its scope of patent protection when on accompanying claim and etc. same domain decide.All this areas have knows the knowledgeable usually, and in not breaking away from this patent spirit or scope, the also moving or retouching of being done all belongs to the equivalence of being finished under the disclosed spirit and changes or design, and should be included in the following claim.
Claims (10)
1. LCD is characterized in that: comprising:
One torsion nematic liquid crystal display panel comprises Polarizer on Polarizer, the liquid crystal layer unit and, described liquid crystal layer configuration of cells described Polarizer down and described between the Polarizer; With
One backlight module, comprise a reflecting type polarizing diaphragm and 1/1st ripple plate, described 1/2nd ripple plates are the tops that are positioned at described reflecting type polarizing diaphragm, the main shaft of described 1/2nd ripple plates and the described penetrating shaft of Polarizer down differ one first angle, and the penetrating shaft of described reflecting type polarizing diaphragm and the described penetrating shaft of Polarizer down differ one second angle, and wherein said first angle is half of described second angle.
2. LCD according to claim 1 is characterized in that: described second angle is π/4.
3. LCD according to claim 1 is characterized in that: described 1/2nd ripple plates are to be formed by N 1/2N ripple plate institute superposition.
4. LCD according to claim 3 is characterized in that: N=2.
5. LCD according to claim 3 is characterized in that: N=4.
6. an optical thin film is installed in the display panels, and described display panels has Polarizer, it is characterized in that: described optical thin film comprises:
One reflecting type polarizing diaphragm; With
/ 1st a ripple plate, be positioned at the top of described reflecting type polarizing diaphragm, the main shaft of described 1/2nd ripple plates and the described penetrating shaft of Polarizer down differ one first angle, and the penetrating shaft of described reflecting type polarizing diaphragm and the described penetrating shaft of Polarizer down differ one second angle, and wherein said first angle is half of described second angle.
7. optical thin film according to claim 6 is characterized in that: described second angle is π/4.
8. optical thin film according to claim 6 is characterized in that: described 1/2nd ripple plates are to be formed by N 1/2N ripple plate institute superposition.
9. optical thin film according to claim 8 is characterized in that: N=2.
10. optical thin film according to claim 8 is characterized in that: N=4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101459698A CN101377587A (en) | 2007-08-30 | 2007-08-30 | Liquid crystal display device and optical film |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101459698A CN101377587A (en) | 2007-08-30 | 2007-08-30 | Liquid crystal display device and optical film |
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| CN101377587A true CN101377587A (en) | 2009-03-04 |
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| CNA2007101459698A Pending CN101377587A (en) | 2007-08-30 | 2007-08-30 | Liquid crystal display device and optical film |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628974A (en) * | 2011-02-07 | 2012-08-08 | Jvc建伍株式会社 | Distributed polarizer and liquid-crystal projection display apparatus using the same |
| CN102736160A (en) * | 2011-03-31 | 2012-10-17 | 富士胶片株式会社 | Laminate film, optically compensatory film, polarizing plate, and liquid crystal display device |
| CN105116600A (en) * | 2015-09-16 | 2015-12-02 | 昆山龙腾光电有限公司 | Liquid crystal display and display device |
| CN105210137A (en) * | 2013-05-16 | 2015-12-30 | 日本瑞翁株式会社 | Display device with capacitive touch panel |
| CN105247393A (en) * | 2013-05-16 | 2016-01-13 | 日本瑞翁株式会社 | Display device with capacitive touch panel |
| CN105425454A (en) * | 2015-12-29 | 2016-03-23 | 上海天马微电子有限公司 | Liquid crystal display panel, manufacturing method thereof and liquid crystal display device |
| CN110231731A (en) * | 2019-05-16 | 2019-09-13 | 武汉华星光电技术有限公司 | Thin Film Transistor-LCD and its manufacturing method |
| CN113504596A (en) * | 2021-06-29 | 2021-10-15 | 河北工业大学 | Wide-viewing-angle composite polarizer |
-
2007
- 2007-08-30 CN CNA2007101459698A patent/CN101377587A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628974A (en) * | 2011-02-07 | 2012-08-08 | Jvc建伍株式会社 | Distributed polarizer and liquid-crystal projection display apparatus using the same |
| CN102736160A (en) * | 2011-03-31 | 2012-10-17 | 富士胶片株式会社 | Laminate film, optically compensatory film, polarizing plate, and liquid crystal display device |
| CN105210137A (en) * | 2013-05-16 | 2015-12-30 | 日本瑞翁株式会社 | Display device with capacitive touch panel |
| CN105247393A (en) * | 2013-05-16 | 2016-01-13 | 日本瑞翁株式会社 | Display device with capacitive touch panel |
| CN105247393B (en) * | 2013-05-16 | 2019-07-19 | 日本瑞翁株式会社 | The display device of static electrification capacity formula touch panel |
| CN105116600A (en) * | 2015-09-16 | 2015-12-02 | 昆山龙腾光电有限公司 | Liquid crystal display and display device |
| CN105116600B (en) * | 2015-09-16 | 2018-06-01 | 昆山龙腾光电有限公司 | Liquid crystal display and display device |
| CN105425454A (en) * | 2015-12-29 | 2016-03-23 | 上海天马微电子有限公司 | Liquid crystal display panel, manufacturing method thereof and liquid crystal display device |
| CN110231731A (en) * | 2019-05-16 | 2019-09-13 | 武汉华星光电技术有限公司 | Thin Film Transistor-LCD and its manufacturing method |
| CN113504596A (en) * | 2021-06-29 | 2021-10-15 | 河北工业大学 | Wide-viewing-angle composite polarizer |
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Open date: 20090304 |