CN101089698A - Display device - Google Patents
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- CN101089698A CN101089698A CN 200710143479 CN200710143479A CN101089698A CN 101089698 A CN101089698 A CN 101089698A CN 200710143479 CN200710143479 CN 200710143479 CN 200710143479 A CN200710143479 A CN 200710143479A CN 101089698 A CN101089698 A CN 101089698A
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Abstract
A display device is prepared as arranging the second penetration axis on polarization plate for making a light provided from display module be a polarized light through said polarization plate, setting double optical-axis half-wave plate on display module and between polarization plate and polarization element, arranging a slow axis on double optical-axis half-wave plate and between the first and the second penetration axis for making polarized direction of polarization light passed through double optical-axis half-wave plate be towards to the first penetration axis.
Description
Technical field
The present invention relates to a kind of display device, and relate in particular to a kind of display device that can allow the user watch by a polarization element.
Background technology
Because LCD is non-self luminous display, therefore need one to add light source providing display panels enough brightness, can be divided into three kinds of penetrating LCD, semi-penetrated semi-reflected liquid crystal display and reflective liquid-crystal displays according to the difference of its light source.Wherein, can use the semi-penetrated semi-reflected liquid crystal display of backlight and external light source to be fit to be applied to mobile phone, personal digital assistant (Personal Digital Assistant simultaneously, PDA) and on e-book Portable (portable) products such as (e-Book), therefore be subjected to each side gradually and attract attention.
In general LCD, can dispose Polarizer on (upper polarizer plate) on the outside surface of its display panels usually and reach Polarizer (lower polarizer plate), to reach the effect of demonstration.But when LCD was applied to portable product, its Polarizer can make the shown image of clearly identification LCD of user that adorns oneself with sunglasses usually.
Figure 1A is the synoptic diagram that sunglasses and LCD collocation are used.See also Figure 1A, LCD 100 comprises backlight 110, last Polarizer 120, the following display panels 140 of Polarizer 130 and between last Polarizer 120 and following Polarizer 130.Shown in Figure 1A, because the bearing of trend of the penetrating shaft of last Polarizer 120 is D1, so the image that display panels 140 shows behind last Polarizer 120 has polarization direction D1, when the bearing of trend of wearing penetrating shaft as the user is the sunglasses 150 of D2, the user only can watch part light, and the brightness that causes the user to watch descends.
Detailed speech, Figure 1B is the polarization direction of the liquid crystal display displays image among Figure 1A and the rectangular plots of sunglasses penetrating shaft.Make rectangular coordinate system among Figure 1B be long limit with LCD 100 as X-axis, and minor face is as Y-axis.See also Figure 1B, the show image with polarization direction D1 only is parallel to the component of the penetrating shaft bearing of trend D2 of sunglasses 150 substantially can be seen by the user, makes the user watch the brightness of show image significantly to reduce.In addition, because the show image with polarization direction D1 belongs to linearly polarized light, so the component that polarization direction D1 is projected in polarization direction D2 is different with the angle of polarization direction D2 and notable difference arranged along with polarization direction D1.In other words, when the user wears sunglasses 150 and watches the direction of LCD 100 to change to some extent, the image that the user saw is along with viewing angle is obviously different, make the user wear sunglasses 150 and watch under the use situation of LCD 100 that LCD 100 exists the high problem of angle interdependence.
The high problem of angle interdependence when in order to solve above-mentioned LCD the user being worn sunglasses, another kind of prior art is suggested.Fig. 2 A is depicted as the synoptic diagram of another existing sunglasses and LCD collocation use, and Fig. 2 B is the polarization direction of liquid crystal display displays image among Fig. 2 A and the rectangular plots of sunglasses penetrating shaft.See also Fig. 2 A and Fig. 2 B, between Polarizer 120 on the LCD 100 and sunglasses 150, add a quarter-wave plate 160.The show image of LCD 100 is through after the quarter-wave plate 160, the polarization direction of show image transfers circularly polarized light to by linearly polarized light, and compared to linearly polarized light, the component of circularly polarized light on each polarised direction is roughly the same, therefore can improve the high problem of angle interdependence of above-mentioned LCD 100.
Though above-mentioned technology can be improved the high problem of LCD 100 angle interdependences, the display brightness when wearing sunglasses and watch LCD for the user still can't effectively promote.Therefore, how wearing under the situation of sunglasses the user, take into account the display brightness and the angle interdependence of LCD, will be the emphasis of LCD in this application development.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of display device, can keep certain display quality the user when polarization element is watched.
The present invention provides a kind of display device in addition, has a pair of optical axis half-wave plate in this display device, makes the polarization direction of show image be able to suitable modulation, to adapt to multiple use situation.
For achieving the above object, the invention provides a kind of display device, be suitable for allowing the user watch across the polarization element with one first penetrating shaft, display device comprises display module, Polarizer and two optical axis half-wave plate.Polarizer is positioned on the display module, and wherein Polarizer has one second penetrating shaft, so that display module can provide a polarized light.Two optical axis half-wave plates are disposed on the display module, and between Polarizer and polarization element, wherein two optical axis half-wave plates have a slow axis, and slow axis is between first penetrating shaft and second penetrating shaft, and can trend towards first penetrating shaft by the polarization direction of the polarized light behind two optical axis half-wave plates.
In one embodiment of this invention, display module comprises a reflection type liquid crystal display module or a semi-penetration, semi-reflective LCD MODULE.
In one embodiment of this invention, display module comprises a backlight and a display panels, and wherein display panels is positioned on the backlight.In one embodiment, display module comprises that also a compensation film for angular field of view or a view film are positioned on the display panels, and wherein compensation film for angular field of view for example is the combination of quarter-wave plate or quarter-wave plate and 1/1st wave plate.
In one embodiment of this invention, display module comprises a light-emitting display panel.
In one embodiment of this invention, display module has a long limit and a minor face, and wherein the angle between first penetrating shaft and the long limit is θ
1, the angle between slow axis and the long limit is θ, the angle between second penetrating shaft and the long limit is θ
2, and θ is between θ
1With θ
2Between.In one embodiment, the angle theta between second penetrating shaft and the long limit
2Be 45 °, and the angle theta between first penetrating shaft and the long limit
1It is 90 °.In another embodiment, the angle theta between second penetrating shaft and the long limit
2Be 45 °, and the angle theta between first penetrating shaft and the long limit
1It is 0 °.
In one embodiment of this invention, two optical axis half-wave plates provide the plate phase delay Rth (Plate retardation) and a plane phase delay Ro (Planar retardation) of a thickness direction.In one embodiment, phase delay Ro in plane comprises and satisfies relational expression 250nm≤Ro≤300nm.In another embodiment, two optical axis half-wave plates have a Nz value and satisfy relational expression Nz=Rth/Ro＜1.4.
The present invention proposes a kind of display device in addition and comprises a display module, a Polarizer and a pair of optical axis half-wave plate.Display module has a long limit and a minor face.Polarizer is positioned on the display module, wherein Polarizer have one with long limit angle be θ
pPenetrating shaft so that display module can provide a polarized light.Two optical axis half-wave plates are disposed on the display module, wherein two optical axis half-wave plates have one with long limit angle be the slow axis of θ, can trend towards the direction of parallel short sides by the polarization direction of the polarized light behind two optical axis half-wave plates, and penetrating shaft and slow axis satisfy the following relationship formula | θ
p|＜| θ |＜90 °.
The present invention proposes another kind of display device and comprises a display module, a Polarizer and a pair of optical axis half-wave plate.Polarizer is positioned on the display module, and wherein Polarizer has a penetrating shaft, so that display module can provide a polarized light.Two optical axis half-wave plates are disposed on the Polarizer, and wherein two optical axis half-wave plates have a slow axis, and the angle of penetrating shaft and slow axis formation is greater than 0 ° and less than 45 °.
In one embodiment of this invention, the angle of above-mentioned penetrating shaft and slow axis formation is about 22.5 °.
In one embodiment of this invention, display module comprises that also a compensation film for angular field of view or a view film are positioned on the display panels.
In one embodiment of this invention, above-mentioned compensation film for angular field of view comprises the combination of a quarter-wave plate or quarter-wave plate and 1/1st wave plate.
In one embodiment of this invention, display module comprises a reflection type liquid crystal display module or a semi-penetration, semi-reflective LCD MODULE.
The present invention is by the configuration of two optical axis half-wave plates, suitably with the polarization direction of the image of display module modulation in addition, in one embodiment, make the penetrating shaft direction of the polarization element that the polarization direction convergence user of image is worn behind the modulation in addition, therefore compared to the configuration mode of existing LCD, can simplify and increase display brightness, reduce the angle interdependence of watching.
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and cooperate appended accompanying drawing, be described in detail below.
Description of drawings
Figure 1A is the synoptic diagram that sunglasses and LCD collocation are used;
Figure 1B is the polarization direction of the liquid crystal display displays image among Figure 1A and the rectangular plots of sunglasses penetrating shaft;
Fig. 2 A is depicted as the synoptic diagram of another existing sunglasses and LCD collocation use;
Fig. 2 B is the polarization direction of the shown image of LCD and the rectangular plots of sunglasses penetrating shaft;
Fig. 3 is the synoptic diagram of a kind of display device of the present invention;
Fig. 4 A watches the synoptic diagram of a kind of display device of the present invention for the user across polarization element;
Fig. 4 B watches the synoptic diagram of a kind of display device of the present invention for the user across polarization element;
Fig. 5 A is existing a kind of display device brightness synoptic diagram of watching across polarization element under the varying level visual angle;
Fig. 5 B is a kind of display device brightness synoptic diagram of watching across polarization element under the varying level visual angle of the present invention;
Fig. 6 is the chromatic diagram of two optical axis half-wave plates of a kind of display device collocation of the present invention Different Plane phase delay;
Fig. 7 is a kind of display module synoptic diagram of the present invention;
Fig. 8 is the synoptic diagram of a kind of display device of the present invention;
Fig. 9 is the synoptic diagram of a kind of display device of the present invention.
Wherein, Reference numeral:
110,250: backlight 120: go up Polarizer
130: following Polarizer 140,260: display panels
150: sunglasses 160,270: quarter-wave plate
200,300,400: display device 210: polarization element
220: display module 220a: long limit
220b: minor face 230: Polarizer
240: two optical axis half-wave plate 280: two/one wave plates
A: penetrating shaft A1: first penetrating shaft
A2: the second penetrating shaft D1, D2: direction
Nz: the ratio R o of plate phase delay and plane phase delay: plane phase delay
Rth: plate phase delay S: slow axis
θ
1, θ, θ
2, θ
p: angle
Embodiment
Fig. 3 is the synoptic diagram of a kind of display device of one embodiment of the invention.Please refer to Fig. 3, the display device 200 of present embodiment is suitable for allowing the user watch across the polarization element 210 with one first penetrating shaft A1.For example, if the user is under the environment of outdoor environment or other sufficiency of illumination, part user has the custom of wearing sunglasses, when user's desire of wearing sunglasses is used display device, can realize that just display brightness obviously descends.At this moment, the sunglasses that the user wore can be considered polarization element 210.The display device 200 of present embodiment comprises display module 220, Polarizer 230 and two optical axis half-wave plate 240.Polarizer 230 is positioned on the display module 220, and wherein Polarizer 230 has one second penetrating shaft A2, so that the light that display module 220 provides becomes a polarized light via this Polarizer 230.Two optical axis half-wave plates 240 are disposed on the display module 220, and between Polarizer 230 and polarization element 210, wherein two optical axis half-wave plates 240 have a slow axis S, and slow axis S is between the first penetrating shaft A1 and the second penetrating shaft A2, and can trend towards the first penetrating shaft A1 by the polarization direction of the polarized light behind two optical axis half-wave plates 240.
Please continue to consult Fig. 3; generally speaking; display module 220 can have a long limit 220a and a minor face 220b usually; with the long limit 220a of display module 220 X-axis as rectangular coordinate; and be Y-axis with the minor face 220b of display module 220, and to make first penetrating shaft A1 of polarization element 210 and the angle between the long limit 220a be θ
1, the angle between the slow axis S of two optical axis half-wave plates 240 and the long limit 220a is θ, and the angle between second penetrating shaft A2 of Polarizer 230 and the long limit 220a is θ
2, as shown in Figure 3, θ is between θ
1With θ
2Between.It should be noted that, be positioned at the polarization direction that slow axis S between the first penetrating shaft A1 and the second penetrating shaft A2 can the modulation polarized light, make the first penetrating shaft A1 of the polarization element 210 that display module 220 is watched via the polarization direction of Polarizer 230 show images trend user, to increase the display brightness that the user was seen.
Fig. 4 A watches the rectangular coordinate system synoptic diagram of a kind of display device of the present invention for the user across polarization element 210.Please refer to Fig. 4 A, generally speaking, the first penetrating shaft A1 of polarization element 210 is vertical in fact with the long limit 220a of display module 220, i.e. θ
1Be 90 °, and the angle theta between second penetrating shaft A2 of Polarizer 230 and the long limit 220a
2It is 45 °, under this kind situation, slow axis S between the first penetrating shaft A1 and the second penetrating shaft A2 has the function of modulation via the direction of polarized light of the second penetrating shaft A2 outgoing, and the brightness that makes the user be watched across polarization element 210 is not significantly reduced.Certainly, adapt to the various demands of watching under the situation of user, the present invention does not limit the angle θ between polarization element 210 and the display module 220 long limit 220a
1, for example, when the user is above-mentioned display module 220 under the situation that vertical type puts, when watching by identical polarization element 210 again, the rectangular coordinate synoptic diagram of display device is shown in Fig. 4 B at this moment, and the first penetrating shaft A1 is parallel with the long limit 220a of display module 220, i.e. θ
1It is 0 ° situation.In like manner, the slow axis S between the first penetrating shaft A1 and the second penetrating shaft A2 also has the function of the polarization direction of modulation display module show image, is not repeated at this.
In detail, two optical axis half-wave plates 240 provide the plate phase delay Rth and a plane phase delay Ro of a thickness direction.The deviser can utilize the polarization direction of selecting different plate phase delay Rth and plane phase delay Ro to come the modulation show image, increase the light quantity of the show image of display module 220 by polarization element 210 whereby, wherein the plane phase delay Ro of two optical axis half-wave plates 240 is about between the 250nm to 300nm.For example, Fig. 5 A and Fig. 5 B are respectively prior art and a kind of display device of the present invention at the brightness synoptic diagram when polarization element is watched under the varying level visual angle.Generally speaking, the ratio of plate phase delay Rth and plane phase delay Ro is defined as Nz.Please earlier with reference to Fig. 5 A, prior art is to be disposed between Polarizer 120 (in Fig. 2 A) and the polarization element 150 (in Fig. 2 A) with quarter-wave plate 160 (in Fig. 2 A), wherein, and the curve when curve 1 is display module _ 0 °; Curve when curve 2 is 45 ° of display modules; Curve when curve 3 is display module _ 90 °; Curve when curve 4 is 135 ° of display modules; Curve when curve 1 ' is display module/polarization element/quarter-wave plate _ 0 °; Curve when curve 2 ' is display module/polarization element/quarter-wave plate _ 45 °; Curve when curve 3 ' is display module/polarization element/quarter-wave plate _ 90 °; Curve when curve 4 ' is display module/polarization element/quarter-wave plate _ 135 °; Learn that by actual measurement the maximal phase that the user watches across polarization element 160 (in Fig. 2 A) is about 0.05 to brightness value.On the other hand, please follow B, be about 250nm at the plane phase delay Ro of two optical axis half-wave plates 240 that present embodiment adopted, and Nz be about 0.8 with reference to Fig. 5, wherein, the curve when curve 5 is display module _ 0 °; Curve when curve 6 is display module _ 45 °; Curve when curve 7 is display module _ 90 °; Curve when curve 8 is display module _ 135 °; Curve when curve 5 ' is 0 ° of display module/polarization element/pair optical axis half-wave plate; Curve when curve 6 ' is display module/polarization element/pair optical axis half-wave plate _ 45 °; Curve when curve 7 ' is display module/polarization element/pair optical axis half-wave plate _ 90 °; Curve when curve 8 ' is display module/polarization element/pair optical axis half-wave plate _ 135 °; Learn that by actual measurement the maximal phase that the user watches across polarization element 210 (in Fig. 3) significantly is promoted to brightness value and is about 0.08.Therefore, when the user when polarization element 210 is watched display device 200, be different from prior art, two optical axis half-wave plates 240 that present embodiment adopted can be so that the display brightness that the user watched be significantly reduced.
On the practice user except the demand of brightness, the deviser still can suitably adjust the plane phase delay Ro of two optical axis half-wave plates 240 across polarization element 210 viewed show images, to improve the color saturation requirement of user for show image.For example, Fig. 6 is the chromatic diagram of two optical axis half-wave plates of a kind of display device collocation of the present invention Different Plane phase delay.See also Fig. 6, A point ◇ represents display module 220 original color representation on chromatic diagram, and on behalf of the user, the B point watch the color representation of display module 220 images on chromatic diagram across polarization element 210, by the relative position of B point and A point ◇ as can be known, the show image that the user is watched across polarization element 210 has the phenomenon of inclined to one side yellow.Please continue to consult Fig. 6, by changing the plane phase delay Ro of two optical axis half-wave plates 240, can be so that the user has different performances across polarization element 210 show image of watching on chromatic diagram, as shown in Figure 6, the plane phase delay Ro numerical value of two optical axis half-wave plates 240 is changed to 300nm in regular turn by 250nm, wherein
The situation of statement display module/polarization element Ro_250;
The situation of statement display module/polarization element Ro_260; The situation of △ statement display module/polarization element Ro_270; The situation of zero statement display module/polarization element Ro_280;
The situation of statement display module/polarization element Ro_290;
The situation of statement display module/polarization element Ro_300.The color representation of display module 220 has evident difference on chromatic diagram.Therefore, the demand that the deviser can adapt to display color is suitably selected two optical axis half-wave plates 240 of Different Plane phase delay Ro numerical value for use, to reduce the yellow problem of show image, promotes display quality.
On the practice, watch the demand of the show image of display device 200 across polarization element 210 at the user, except the consideration of above-mentioned brightness performance and color saturation, generally speaking, for fear of the show image Luminance Distribution inequality of display device 200, the numerical value of the plate phase delay Rth that the deviser also can be by finely tuning two optical axis half-wave plates 240 makes the Luminance Distribution optimization of show image.Particularly, when the numerical value of the ratio Nz of plate phase delay Rth and plane phase delay Ro satisfies particular range, can be so that the Luminance Distribution of show image be more even.For example, when Nz less than 1.4 the time, preferable illuminance distribution degree is arranged in one embodiment of this invention.
Fig. 7 is a kind of display module synoptic diagram of the present invention, and display module 220 for example is a LCD MODULE.Please refer to Fig. 7, display module 220 comprises a backlight 250 and a display panels 260, and wherein display panels 260 is positioned on the backlight 250.Having wide range of applications of display device of the present invention, wherein display module 220 for example is non-autoluminescence display modules such as reflection type liquid crystal display module or semi-penetration, semi-reflective LCD MODULE, also can for example be autoluminescence display modules such as organic light emitting diode display, be to be practical range with non-autoluminescence display module in the present embodiment.Please continue to consult Fig. 7, in order to promote the display quality of display module 220, display module 220 can further comprise compensation film for angular field of view, the quarter-wave plate 270 as shown in Figure 7 and the combination of 1/1st wave plate 280.Certainly, compensation film for angular field of view also can only adopt the compensate film of quarter-wave plate 270 or other kind separately.What deserves to be mentioned is that in other embodiments, display module 220 also can attach the optical compensation films of other kind on display panels 260, view film for example is with the display quality of further enhancement display module 220.
Fig. 8 is the synoptic diagram of a kind of display device of the present invention.Please refer to Fig. 8, display device 300 comprises a display module 220, a Polarizer 230 and a pair of optical axis half-wave plate 240.Display module 220 has a long limit 220a and a minor face 220b, in the present embodiment with the long limit 220a of display module 220 X-axis as rectangular coordinate, is Y-axis with the minor face 220b of display module 220.As shown in Figure 8, Polarizer 230 is positioned on the display module 220, wherein Polarizer 230 have one with long limit 220a angle be θ
pPenetrating shaft A so that display module 220 one of provides light to become a polarized light via this Polarizer 230.What deserves to be mentioned is the penetrating shaft A of the Polarizer 230 in the present embodiment and long limit 220a angle theta
pSecond penetrating shaft and long limit 220a angle theta with Polarizer 230 in Fig. 3 display device 200
2Similar.Please continue with reference to Fig. 8, two optical axis half-wave plates 240 are disposed on the display module 220, wherein two optical axis half-wave plates 240 have one with long limit 220a angle be the slow axis S of θ.Above-mentioned penetrating shaft A and slow axis S satisfy the following relationship formula | θ
p|＜| θ |＜90 °, and because two optical axis half-wave plate 240 has the function of the polarization direction of modulation polarized light, therefore after the show image of display module 220 outgoing was passing through two optical axis half-wave plates 240, the polarization direction of polarized light can trend towards the direction of parallel short sides 220b.In addition, display module of the present invention, Polarizer and two optical axis half-wave plate have a detailed description in preamble, so no longer repeat in this.
Fig. 9 is the synoptic diagram of a kind of display device of the present invention.Please refer to Fig. 9, display device 400 comprises a display module 220, a Polarizer 230 and a pair of optical axis half-wave plate 240.Polarizer 230 is positioned on the display module 220, and wherein Polarizer 230 has a penetrating shaft A, so that the light that display module 220 provides becomes a polarized light via this Polarizer 230.Two optical axis half-wave plates 240 are disposed on the Polarizer 230, wherein two optical axis half-wave plates 240 have a slow axis S, and the angle that penetrating shaft A and slow axis S form is greater than 0 ° and less than 45 °, for example, in the present embodiment, the angle that penetrating shaft A and slow axis S form is about 22.5 °, and above-mentioned two optical axis half-wave plates 240 have the function of the polarization direction of modulation polarized light, can be so that via the polarized light of the penetrating shaft A slow axis S direction convergence toward pair optical axis half-wave plates 240.In addition, above-mentioned display module 220 for example is reflection type liquid crystal display module 220 or semi-penetration, semi-reflective LCD MODULE 220.In addition, in order to promote the display quality of display module 220, display module 220 can further comprise a compensation film for angular field of view, and wherein compensation film for angular field of view for example is the combination of quarter-wave plate 270 or quarter- wave plate 270 and 1/1st wave plate 280.In other embodiments, display module 220 can comprise that also a view film is positioned on the display panels 260.In addition, display module of the present invention, Polarizer and two optical axis half-wave plate have a detailed description in preamble, so no longer repeat in this.
The present invention is by the configuration of two optical axis half-wave plates, suitably with the polarization direction of the show image of display module modulation in addition, to adapt to multiple use situation.Simultaneously, can further promote the display quality of show image by the phase-delay quantity of finely tuning two optical axis half-wave plates.In addition, in one embodiment, the penetrating shaft direction of the polarization element of can the convergence user being worn via the polarization direction of the image behind two optical axis half-wave plate modulations, therefore compared to existing, display device of the present invention can increase display brightness and reduce the angle interdependence that the user watches.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; being familiar with those of ordinary skill in the art ought can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (10)
1, a kind of display device is characterized in that, comprising:
One display module;
One Polarizer is positioned on this display module, and wherein this Polarizer has a penetrating shaft, so that the light that this display module provides becomes a polarized light via this Polarizer; And
A pair of optical axis half-wave plate is disposed on this Polarizer, and wherein this pair optical axis half-wave plate has a slow axis, and the angle of this penetrating shaft and the formation of this slow axis is greater than 0 ° and less than 45 °.
2, display device according to claim 1 is characterized in that, the angle that this penetrating shaft and this slow axis form is about 22.5 °.
3, display device according to claim 1 is characterized in that, this display module comprises a light source and a display panels, and this display panels is positioned on this light source.
4, display device according to claim 3 is characterized in that, this display module comprises that also a compensation film for angular field of view or a view film are positioned on this display panels.
5, display device according to claim 4 is characterized in that, this compensation film for angular field of view comprises the combination of a quarter-wave plate or this quarter-wave plate and 1/1st wave plate.
6, display device according to claim 1 is characterized in that, this display module comprises a reflection type liquid crystal display module or a semi-penetration, semi-reflective LCD MODULE.
7, display device according to claim 1 is characterized in that, this pair optical axis half-wave plate provides the plate phase delay Rth and a plane phase delay Ro of a thickness direction.
8, display device according to claim 7 is characterized in that, this plane phase delay Ro comprises and satisfies relational expression 250nm≤Ro≤300nm.
9, display device according to claim 8 is characterized in that, this pair optical axis half-wave plate comprises and satisfies relational expression Nz=Rth/Ro＜1.4.
10, display device according to claim 7 is characterized in that, this pair optical axis half-wave plate comprises and satisfies relational expression Nz=Rth/Ro＜1.4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101434794A CN100489622C (en) | 2007-08-01 | 2007-08-01 | Display device |
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|---|---|---|---|
| CNB2007101434794A CN100489622C (en) | 2007-08-01 | 2007-08-01 | Display device |
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| CN101089698A true CN101089698A (en) | 2007-12-19 |
| CN100489622C CN100489622C (en) | 2009-05-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976164A (en) * | 2010-10-18 | 2011-02-16 | 汕头超声显示器有限公司 | Capacitor touch screen |
| CN101946195B (en) * | 2008-05-22 | 2013-06-12 | Lg化学株式会社 | Luminance-enhancing polarising plate for an organic light-emitting element |
| CN103389536A (en) * | 2012-05-10 | 2013-11-13 | 三星电子株式会社 | Multilayered optical film, manufacturing method thereof, and display device |
-
2007
- 2007-08-01 CN CNB2007101434794A patent/CN100489622C/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101946195B (en) * | 2008-05-22 | 2013-06-12 | Lg化学株式会社 | Luminance-enhancing polarising plate for an organic light-emitting element |
| CN101976164A (en) * | 2010-10-18 | 2011-02-16 | 汕头超声显示器有限公司 | Capacitor touch screen |
| CN101976164B (en) * | 2010-10-18 | 2013-06-05 | 汕头超声显示器有限公司 | Capacitor touch screen |
| CN103389536A (en) * | 2012-05-10 | 2013-11-13 | 三星电子株式会社 | Multilayered optical film, manufacturing method thereof, and display device |
| CN103389536B (en) * | 2012-05-10 | 2016-07-06 | 三星电子株式会社 | Multi-layer optical film, the manufacture method of blooming and display device |
| US9921351B2 (en) | 2012-05-10 | 2018-03-20 | Samsung Electronics Co., Ltd. | Multilayered optical film, manufacturing method thereof, and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100489622C (en) | 2009-05-20 |
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