CN1632661A - Liquid crystal display capable of adjusting visual angle and method of adjusting visual angle thereof - Google Patents
Liquid crystal display capable of adjusting visual angle and method of adjusting visual angle thereof Download PDFInfo
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Abstract
It is a display device with adjustable vision angle, which comprises aphototropism elements, first display panel, second display panel and data driver. The first display panel is set above the aphototropism elements and comprises the first LCD layer and the first picture element electrode relative to each picture element. The second display panel is set above the aphototropism elements and comprises the second LCD layer and the second picture element electrode relative to each picture element. The data driver is coupled with the first and second display panels to drive the first and second picture element electrodes.
Description
Technical field
The LCD of the relevant a kind of adjustable viewing angle of the present invention and adjust the visual angle method, and particularly drive two-layer liquid crystal layer and reach the adjustable LCD in visual angle and adjust the visual angle method relevant for a kind of.
Background technology
Progress along with science and technology, the consumer has more opportunity to use the mobile product with display in the public area, for example mobile phone, notebook etc., if but consumer when using in the public domain, want to possess individual's privacy again, at this moment they can need the display of an adjustable viewing angle.And the control method of following three kinds of more common visual angle of liquid crystal display is arranged at present.
Fig. 1 utilizes window shutter to absorb material to adjust the synoptic diagram of visual angle of liquid crystal display in the known techniques.Please refer to Fig. 1, add venetian blind type absorbing structure 110 in LCD 100 fronts, and arrange with regular fashion.By height h and the venetian blind type absorbing structure 110 each intervals distance 1 of adjusting venetian blind type absorbing structure 110 itself, can limit the angle that light L that display 100 sends enters observer's eyes.Therefore only in the visual angle is the scope of θ, light L could pass through venetian blind type absorbing structure 110, and the observer just can see image.The outer light L that the visual angle surpasses θ then can be absorbed by venetian blind type absorbing structure 110 all.
Yet the shortcoming of this kind method of controlling viewing angle is: venetian blind type absorbing structure 110 must be added on outside the display outward more in use, causes the inconvenience in the use; Because partly light L is absorbed by venetian blind type absorbing structure 110, cause more than the display brightness meeting drop by half; And the adjustment at its visual angle increases simultaneously or reduces about being, can't satisfy various demand that the user is switched the visual angle, for example provides only to face and the user of left side side-looking observes.
Fig. 2 A and 2B utilize the light scattering material to adjust the synoptic diagram of visual angle of liquid crystal display in the known techniques.Please refer to Fig. 2 A and Fig. 2 B, between parallel Lb backlight and liquid crystal layer (Cell) 200, add the light scattering structure 210 of an adjustable lay the grain scattering properties, for example be Polymer Dispersed Liquid Crystal (Polymer Dispersed LiquidCrystal, PDLC).Put on the voltage of light scattering structure 210 by adjustment, determine narrow field-of-view mode and wide viewing angle pattern.Under narrow field-of-view mode, light scattering structure 210 is the voltage turn-on state, and light scattering structure 210 is a transparence, and Lb backlight is that keeping parallelism passes through liquid crystal layer 200, as shown in Fig. 2 A.Therefore, the observer who only faces just can observe image.And under the wide viewing angle pattern, light scattering structure 210 is the voltage not on-state, and Lb backlight forms scattered light Ls by liquid crystal layer 200 via the effect of light scattering material, makes the observer at each visual angle all can be observed image, as shown in Fig. 2 B.
Yet the shortcoming of this kind method of controlling viewing angle is: when light scattering structure 210 switched to the voltage turn-on state, Lb backlight had partly when passing through light scattering structure 210 and is reflected, and caused the brightness of liquid crystal panel 200 to reduce; And as described in the same example, this kind method of controlling viewing angle only can provide narrow visual angle and two kinds of patterns of wide viewing angle, and can't adjust at the required visual angle of user, thereby has limited to various selection that the visual angle is adjusted.
Fig. 3 utilizes in the known techniques to add LCD to reach the viewing angle control synoptic diagram of the adjustable effect in visual angle.Please refer to Fig. 3 A and Fig. 3 B, add the alignment direction of alignment film on the LCD, produce wide viewing angle and the two kinds of patterns in narrow visual angle by adjustment.Wherein Fig. 3 A is under the narrow field-of-view mode, the image 300 that the positive apparent time of observer is seen.When looking side ways, the observer can see then that specific bright dark alternate figure 310 covers the image 300 that shows, shown in Fig. 3 B, makes the observer be difficult for the identification image, thereby reaches the adjustable effect in visual angle.
Yet, as described in three above-mentioned examples, the adjustable LCD framework in these visual angles is carrying out that the shortcoming that brightness descends, contrast descends is arranged when switch at the visual angle more at present, and the visual angle can't be switched to face beyond the required visual angle of user, therefore all non-is the real adjustable method in visual angle.
Summary of the invention
In view of this, purpose of the present invention is exactly in the LCD that a kind of adjustable viewing angle is provided and adjusts the visual angle method.Display has two-layer liquid crystal layer.When the wide viewing angle pattern was operated, wherein to be urged to phase delay be zero to one deck liquid crystal layer, only controls shown data or figure with the phase delay of another layer liquid crystal layer.When the operation of narrow field-of-view mode, drive the phase delay of two-layer liquid crystal layer, make and face or to look side ways the phase delay of being seen different, to reach the adjustable effect in visual angle.
Propose a kind of LCD of adjusting display view angle according to an aspect of the present invention, comprise backlight assembly, first display panel, second display panel and data driver.Backlight assembly is backlight in order to produce.First display panel is arranged at the backlight assembly top, and first display panel comprises first upper substrate, first infrabasal plate and first liquid crystal layer.First infrabasal plate has first pixel electrode of corresponding each pixel.First liquid crystal layer is arranged between first upper substrate and first infrabasal plate.Second display panel is arranged at the backlight assembly top, and second display panel comprises second upper substrate, second infrabasal plate and second liquid crystal layer.Second infrabasal plate has second pixel electrode of each pixel.Second liquid crystal layer is arranged between second upper substrate and second infrabasal plate.Data driver couples first display panel and second display panel, in order to drive first pixel electrode and second pixel electrode of corresponding each pixel.Data driver is to drive first pixel electrode of corresponding each pixel to carry out the wide viewing angle operator scheme in order to the output gray scale voltage, and in order to export first pixel electrode of corresponding each pixel of first pixel voltage drive, on respect to first skew direction of first display panel, to show that required pixel image is to carry out narrow visual angle operator scheme.
Propose a kind of method of adjusting the liquid crystal display displays visual angle according to a further aspect of the invention, comprise with gray scale voltage driving first pixel electrode of corresponding each pixel to carry out the wide viewing angle operator scheme; And make the pixel image that shows corresponding these a little pixels on first skew direction of relative first display panel to carry out narrow visual angle operator scheme with first pixel electrode of corresponding each pixel of pixel voltage drive.
For above-mentioned purpose of the present invention, characteristics and advantage can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. is elaborated as follows:
Description of drawings
Fig. 1 utilizes window shutter to absorb material to adjust the synoptic diagram of visual angle of liquid crystal display in the known techniques.
Fig. 2 A and Fig. 2 B utilize the light scattering material to adjust the synoptic diagram of visual angle of liquid crystal display in the known techniques.
Fig. 3 A and Fig. 3 B utilize in the known techniques to add LCD to reach the viewing angle control synoptic diagram of the adjustable effect in visual angle.
Fig. 4 A is the block schematic diagram according to a preferred embodiment of the present invention LCD.
Fig. 4 B is the diagrammatic cross-section according to a preferred embodiment of the present invention LCD.
Fig. 5 A and Fig. 5 B are according to the simplification sectional view of the present invention's first example in the LCD of wide viewing angle operator scheme.
Fig. 5 C and Fig. 5 D are according to the simplification sectional view of the present invention's first example in the LCD of narrow visual angle operator scheme.
Fig. 5 E and Fig. 5 F are path backlight synoptic diagram when the observer looks side ways angle 45 degree and 60 and spends among Fig. 5 D.
Fig. 6 A and Fig. 6 B are according to the simplification sectional view of the present invention's second example in the LCD of narrow visual angle operator scheme.
Fig. 7 A and Fig. 7 B are according to the simplification sectional view of the present invention's the 3rd example in the LCD of narrow visual angle operator scheme.
Fig. 8 is a method flow diagram of adjusting the liquid crystal display displays visual angle according to a preferred embodiment of the present invention.
Embodiment
Please be simultaneously with reference to Fig. 4 A and Fig. 4 B, it is respectively according to a preferred embodiment of the present invention LCD square and diagrammatic cross-section.LCD 400 comprises backlight assembly 410, first polaroid (Polarizer) 421, first display panel 430, second display panel 440, second polaroid 422 and data driver 450.First display panel 460 and second display panel 440 are arranged at backlight assembly 410 tops, and are arranged between first polaroid 421 and second polaroid 422.Second display panel 440 is arranged at first display panel, 430 tops.First display panel 430 comprises first upper substrate 432, first liquid crystal layer 434 and first infrabasal plate 436.First liquid crystal layer 434 is arranged between first upper substrate 432 and first infrabasal plate 436.Second display panel 440 comprises second upper substrate 442, second liquid crystal layer 444 and second infrabasal plate 446.Second liquid crystal layer 444 is arranged between second upper substrate 442 and second infrabasal plate 446.
First by the Lb backlight that backlight assembly 410 sends through first polaroid 421, through first display panel 430 and second display panel 440, through second polaroid 422, be incident to observer's eyes at last more then.Shown in Fig. 4 B, first infrabasal plate 436 of first display panel 430 has first pixel electrode 437 of respective pixel 460, and second infrabasal plate 446 of second display panel 440 also has second pixel electrode 447 of respective pixel 460.Data driver 450 couples first display panel 430 and second display panel 440, in order to export the first pixel voltage V1 and second pixel voltage V2 to the first pixel electrode 437 and second pixel electrode 447, drive the liquid crystal deflecting element of first liquid crystal layer 434 and second liquid crystal layer 444, to produce required wide viewing angle and narrow field-of-view mode.
The first above-mentioned polaroid 421 and the polarizing angle of second polaroid 422 differ 90 degree.By data driver 450 input first pixel electrode 437 and first pixel voltage V1 of second pixel electrode 447 and the drivings of the second pixel voltage V2, controlling back light Lb sees through total phase delay of first liquid crystal layer 434 and second liquid crystal layer 444.Total phase delay is represented with Δ nd, the phase delay (Δ nd1) that Δ nd=first liquid crystal layer 434 produces and the summation of the phase delay (Δ nd2) of second liquid crystal layer, 444 generations.Wherein Δ n is the difference of long axis of liquid crystal molecule refractive index and minor axis refractive index, and d1 and d2 are respectively the thickness of liquid crystal layer 434 and 444.If Δ nd value is zero, represent that the backlight of transflective liquid crystal layer 434 and 444 do not have phase delay, but because the polarization angle of polaroid 421 and 422 is orthogonal, this Lb backlight can be absorbed, so the pixel 460 that the observer sees is dark by second polaroid 422.If Δ nd value is 1/2 times of wavelength of backlight λ, that is phase delay backlight 90 degree of transflective liquid crystal layer 434 and 444, polarization angle because of second polaroid 422 is just vertical with first polaroid 421 again, this Lb transmissive second polaroid 422 backlight, and the pixel 460 that makes the observer see is bright.
Next just (Vertical Alignment, VA) the type LCD is an example, is divided into three examples and cooperates graphicly illustrating that how LCD of the present invention produces wide viewing angle and narrow field-of-view mode, reaches the adjustable purpose in visual angle with homeotropic alignment.In addition, graphic in phase delay be that zero pixel represents that with blank grid phase delay is that the pixel of λ/8 represents that to dredge the oblique line grid phase delay is that the pixel of λ/4 is represented with close oblique line grid, and phase delay is that the pixel of λ/2 is then represented with the point-like grid.
Example one:
Please refer to Fig. 5 A and Fig. 5 B, it is to simplify sectional view according to the present invention's first example in the LCD of wide viewing angle operator scheme.When LCD 400 is in the wide viewing angle operator scheme, can be zero state for phase delay delta nd1 with 434 drivings of whole layer first liquid crystal layer.For example be first pixel voltage when being 0V, the liquid crystal molecule of first liquid crystal layer 434 is the state of standing erectly.At this moment, Lb backlight is incident to second liquid crystal layer 444 via first liquid crystal layer 434, and the information that institute's desire shows is then decided by second liquid crystal layer 444.Certainly, also whole layer second liquid crystal layer 444 can be driven to phase delay delta nd2 is zero state, and the information that desire shows is decided by first liquid crystal layer 434.
Shown in Fig. 5 A, for facing the observer, the phase delay delta nd2 of respective pixel 510 is λ/8 in second liquid crystal layer 444, then total phase delay delta nd=0+ λ/8=λ/8 of the Lb backlight that is penetrated by pixel 510.Therefore, face the picture 520 pairing pixels 522 that the observer sees and be bright (close oblique line grid).The phase delay delta nd2 of respective pixel 512 is zero in second liquid crystal layer 444, then total phase delay delta nd=0+0=0 of the Lb backlight that is penetrated by pixel 512.So the picture 520 pairing pixels 524 that the observer sees are dark (blank grid).
Shown in Fig. 5 B, the received Lb backlight of stravismus observer is and liquid crystal layer 434 and 444 folder θ angles, the phase delay delta nd2 of respective pixel 510 is λ/8 in second liquid crystal layer 444, though this moment is inequality with the path P a1 that positive apparent time Lb backlight is walked by the path P a2 that Lb backlight walked that pixel 510 penetrates, it is right because the phase delay delta nd1 of liquid crystal layer 434 is 0, therefore, total phase delay delta nd=0+ λ/8=λ/8 are identical with positive apparent time.Promptly look side ways picture 530 pairing pixels 531 that the observer sees for bright, picture 520 respective pixel 522 are identical with facing.Similarly, the pixel 533 that respective pixel 512 corresponds to stravismus picture 530 in second liquid crystal layer 444 is for dark, and is also identical with pixel 524 brightness of facing picture 520.Hence one can see that, and the phase delay of stravismus picture 530 can be by the decision of second liquid crystal layer 444, and therefore, the light and shade distribution picture 530 that the stravismus observer sees and is faced light and shade distribution picture 520 that the observer sees for consistent, all can obtain correct information.
Please refer to Fig. 5 C and Fig. 5 D, it is to simplify sectional view according to the present invention's first example in the LCD of narrow visual angle modulo operation formula.When LCD 400 is in narrow visual angle operator scheme, the Δ nd1 and the Δ nd2 that can drive first liquid crystal layer 434 and second liquid crystal layer respective pixel about in the of 444 are unanimity, and have only half of the phase delay delta nd that desires display frame 540 respective pixel, in other words, first phase delay and second phase delay that produces by first liquid crystal layer 434 and second liquid crystal layer, 444 pairing each pixel as a parallel Lb backlight has fixed proportion relation.For example, the Δ nd1 and the Δ nd2 of first liquid crystal layer 434 and second liquid crystal layer, 444 respective pixel 513 all can be driven in λ/8 if desire to present on the picture displayed 540 bright pixel 541 of phase delay λ/4.Therefore, after two liquid crystal layers 434 and 444, the phase delay delta nd=λ of pixel 541/8+ λ/8=λ/4.In like manner as can be known, the phase delay delta nd1 of liquid crystal layer 434 and 444 respective pixel 515 and Δ nd2 are all 0.Therefore, face the observer and see that the pixel 543 of picture 540 is for dark.
Yet shown in Fig. 5 D, owing to have a spacer segment distance D between two liquid crystal layers 434 and 444, the Lb backlight that the stravismus observer receives can be the θ angle with liquid crystal layer 434, and its path of walking is with to face the observer different, thereby produces inconsistent phase delay result.The Lb backlight of transmission second liquid crystal layer 444 respective pixel 513 is to be penetrated by first liquid crystal layer, 434 respective pixel 521 (blank grid).Therefore look side ways phase delay delta nd=0+ λ/8=λ/8 of the pixel 545 that presents in the picture 550.In like manner, the Lb backlight of transmission second liquid crystal layer 444 respective pixel 515 is to be penetrated by first liquid crystal layer, 434 respective pixel 523.Therefore look side ways phase delay delta nd=λ/8+0=λ/8 of the pixel 547 that presents in the picture 550.
Please refer to Fig. 5 E and Fig. 5 F, it is the Lb backlight path synoptic diagram when observer looks side ways angle 45 degree and 60 and spends among Fig. 5 D.If the display panel 430 and 440 with 15 inches is an example, the cycle of each pixel is about 0.3mm, and the distance of liquid crystal layer 434 and 444 is about the thickness 1.4mm of two sheet glass.When we when facing about miter angle and see this second display panel 440, the horizontal range through liquid crystal layer 434 and 444 is 1.4 * (tan45 °)=1.4mm as can be known.Have 3 pixels between the pixel 551 of Lb process liquid crystal layer 434 backlight and the pixel 552 of liquid crystal layer 444, shown in Fig. 5 E.And when from facing about 60 degree angles when seeing this panel 420, have 6 pixels between the pixel 554 of Lb backlight through the pixel 553 of liquid crystal layer 434 and liquid crystal layer 444, shown in Fig. 5 F.So when the visual angle was big more, the pixel of passing through liquid crystal layer 434 and 444 differed far away more as can be known, the image of seeing can be fuzzyyer.Therefore, corresponding fixing spacing distance D, the visual angle is bigger, and the picture that the observer saw is fuzzyyer, and corresponding fixed viewpoint, spacing distance D is bigger, and the picture that the observer saw is also fuzzyyer.
In addition, when switching to narrow visual angle operator scheme, the phase delay delta nd1 of liquid crystal layer 434 and 444 corresponding pixels and Δ nd2 are except above-mentioned 1: 1, also can use other ratio, it for example is 1: 2 o'clock, it is λ/4 that complete bright pixel-phase postpones Δ nd, can be by one deck liquid crystal layer phase delay λ/12 wherein, and another layer phase delay λ/6 and obtaining.Therefore, change, can adjust different angulars field of view by proportionate relationship.
Example two:
In example two, the type of drive of wide viewing angle operator scheme is identical with example one.But the mode that drives liquid crystal layer 434 and 444 in the operator scheme of narrow visual angle is different with example one.
Please refer to Fig. 6 A and Fig. 6 B, it is to simplify diagrammatic cross-section according to the present invention's second example in the LCD of narrow visual angle operator scheme.When LCD 400 was in narrow visual angle operator scheme, the information that desire can be shown was partly represented by liquid crystal layer 434, is partly represented by liquid crystal layer 444.When facing observation, as shown in Figure 6A, the phase delay delta nd1 of corresponding contiguous pixels P11, P12, P13 and Δ nd2 all are respectively λ/4 and 0 in the liquid crystal layer 434 and 444.So phase delay delta nd=λ/4+0=λ/4 of respective pixel D11, the D12 of the picture 600 that the observer sees and D13, promptly pixel D11, D12 and D3 are all bright.In like manner, the phase delay delta nd1 of corresponding contiguous pixels P21, P22 and P23 and Δ nd2 are all 0 in the liquid crystal layer 434 and 444, total phase delay delta nd=0+0=0.So facing picture 600 respective pixel D21, D22 and D23 is all secretly.Moreover the phase delay delta nd1 of liquid crystal layer 434 and 444 corresponding contiguous pixels P31, P32 and P33 and Δ nd2 all are respectively 0 and λ/4, total phase delay delta nd=0+ λ/4=λ/4.So facing picture 600 respective pixel D31, D32 and D33 is all bright.Therefore, facing the observer and can see the light and dark picture 600 that is partly produced by liquid crystal layer 444 superpositions by liquid crystal layer 434 and part, is the correct information that desire shows.
But when stravismus is observed,, thereby produce the different result of phase delay because difference when observing is faced in the path that Lb backlight walked.The Lb backlight of transflective liquid crystal layer 444 respective pixel P22, P23, P31, P32 and P33 is penetrated by liquid crystal layer 434 respective pixel P11, P12, P13, P21 and P22 among Fig. 6 B.Phase delay delta nd1 is respectively λ/4, λ/4, λ/4,0,0, and phase delay delta nd2 is respectively 0,0, λ/4, λ/4, λ/4, and total phase delay delta nd is respectively λ/4, λ/4, λ/2, λ/4, λ/4.Therefore, respective pixel Q1, Q2, Q3, Q4 and the Q5 of the picture 610 seen of stravismus observer are all bright.Wherein pixel Q3 is bright than pixel Q1, Q2, represents with the point-like grid.Obviously, the pixel Q1-Q5 of stravismus picture 610 corresponds to pixel D22, the D23, D31, D32 and the D33 that face picture 600 very big-difference.
Example three:
In example three, the type of drive of wide viewing angle operator scheme is identical with example one.But the mode that drives liquid crystal layer 434 and 444 in the operator scheme of narrow visual angle is different with example one.
Please refer to Fig. 7 A and Fig. 7 B, it is to simplify sectional view according to the present invention's the 3rd example in the LCD of narrow visual angle operator scheme.When LCD 400 during in narrow visual angle operator scheme, this narrow visual angle and non-perpendicular to the direction of liquid crystal layer 434 and 444, a but right squint oblique angle Ψ is arranged, for example 45 degree.According to this Ψ angle, the Lb backlight of transflective liquid crystal layer 444 corresponding contiguous pixels A5-A9 is penetrated by liquid crystal layer 434 respective pixel A1-A5.Phase delay delta nd1 is respectively λ/8, λ/8, λ/8,0,0, and phase delay delta nd2 is respectively λ/8, λ/8, λ/8,0,0, and total phase delay delta nd is respectively λ/4, λ/4, λ/4,0,0.Therefore, the pixel C1-C5 of right stravismus picture 700 correspondences is for bright, bright, bright, dark, dark, and is the correct picture of desire demonstration.Wherein the ratio of phase delay delta nd1 and Δ nd2 also can be other proportionate relationship except above-mentioned 1: 1, for example was 1: 2.Be that Δ nd1 is respectively λ/12, λ/12, λ/12,0,0, and Δ nd2 is respectively λ/6, λ/6, λ/6,0,0.
Yet, shown in Fig. 7 B, for facing the observer, the phase delay delta nd1 of transflective liquid crystal layer 434 and 444 respective pixel A5-A9 and Δ nd2 are respectively 0,0, λ/8, λ/8, λ/8 and λ/8, λ/8, λ/8,0,0, and total phase delay delta nd is respectively λ/8, λ/8, λ/4, λ/8, λ/8.Therefore, it is partly bright, partly bright, bright, partly bright and partly bright entirely facing picture 710 respective pixel B1-B5.Obviously see that with right obliquely view person the light and shade of correct picture 700 is distributed with very big-difference.No matter and be to face or left obliquely view person will see chaotic picture.Therefore, utilize the different driving mode of two-layer liquid crystal layer 434 and 444 liquid crystal molecules, can produce the out of phase delaying state in the different visual angles direction, to reach the adjustable purpose in visual angle.
Please refer to Fig. 8, it is a method flow diagram of adjusting the liquid crystal display displays visual angle according to a preferred embodiment of the present invention.At first, in step 800,, for example be the driving voltage of 0V with gray scale voltage, first pixel electrode 437 that drives corresponding each pixel 460 is to carry out the wide viewing angle operator scheme.Shown in first example, face and look side ways the observer and all can see correct image information.Then, in step 810,, for example be 5V with the first pixel voltage V1, drive first pixel electrode 437 of corresponding each pixel 460, make the pixel image that shows respective pixel 460 on first skew direction of relative first display panel 430 to carry out narrow visual angle operator scheme.Shown in first example, drive first pixel electrode 437 and second pixel electrode 447 of corresponding same pixel 460 respectively with identical pixel voltage V1 and V2, and in the positive apparent direction display frame 540 of vertical display panel 430 and 440.Look side ways the observer and will see incorrect picture 550 this moment.
Shown in second example, with the first pixel voltage V1 and the second pixel voltage V2 one is normal pixel voltage wherein, for example 5V and another person are gray scale voltage, for example are the type of drive of 0V, and the direction in vertical display panel 430 and 440 produces desire display frame 600.At this moment, the stravismus observer will see incorrect picture 610.
Perhaps shown in the 3rd example, in deflection display panel 430 and 440 angles? direction on corresponding first pixel electrode 437 and second pixel electrode 447, drive with the first identical pixel voltage V1 and the second pixel voltage V2, and in the angle excursion of display panel 430 and 440? on the direction, provide the stravismus observer to desire display frame 700.At this moment, face the observer and will see incorrect picture 710.Therefore, all can reach the purpose that narrow field-of-view mode is provided.
As mentioned above, though being example with the vertically aligned liquid crystal display, the present invention explains, right LCD of the present invention can also be applicable to twisted nematic (Twisted Nematic, TN) escope and horizontal drive display (In-Plane Switching, IPS).Two-layer liquid crystal layer is feasible to be faced or the phase delay difference backlight of squinter's reception as long as can drive, all can reach the adjustable purpose in visual angle, therefore, and neither disengaging technical scope of the present invention.
The LCD that the above-mentioned preferred embodiment of the present invention is disclosed, its advantage is that display interior increases a slice liquid crystal layer originally, by the Liquid Crystal Molecules Alignment that drives two-layer liquid crystal layer, adjust the phase delay via two-layer liquid crystal layer backlight, can produce the narrow visual angle operator scheme of required wide viewing angle operator scheme and multiple observation visual angle, reach the adjustable purpose in real visual angle.
In sum; though the present invention discloses as above with a preferred embodiment; yet it is not in order to limit the present invention; any person skilled in the art person; without departing from the spirit and scope of the present invention; when the variation that can do various equivalences or replacement, so protection scope of the present invention is when looking accompanying being as the criterion that the application's claim scope defined.
Claims (12)
1. the LCD that can adjust display view angle comprises:
One backlight assembly, backlight in order to produce one;
One first display panel is arranged at this backlight assembly top, and this first display panel comprises:
One first upper substrate;
One first infrabasal plate; This first infrabasal plate has a plurality of first pixel electrodes of corresponding a plurality of pixels; And
One first liquid crystal layer is arranged between this first upper substrate and this first infrabasal plate;
One second display panel is arranged at this backlight assembly top, and this second display panel comprises:
One second upper substrate;
One second infrabasal plate, one second pixel electrode with corresponding each those pixel; And
One second liquid crystal layer is arranged between this second upper substrate and this second infrabasal plate; And
One data driver couples this first display panel and this second display panel, in order to drive this first pixel electrode and this second pixel electrode of corresponding each those pixel;
Wherein this data driver drives this first pixel electrode of corresponding each pixel to carry out a wide viewing angle operator scheme in order to export a gray scale voltage, and in order to export this first pixel electrode of corresponding each those pixel of one first pixel voltage drive, on respect to one first skew direction of this first display panel, to show that required pixel image is to carry out a narrow visual angle operator scheme.
2. LCD as claimed in claim 1 is characterized in that this first pixel electrode of exporting corresponding each pixel of this gray scale voltage driving by this data driver makes that this one first phase delay or one second phase delay that is produced via this first liquid crystal layer or this second liquid crystal layer of correspondence backlight is zero.
3. LCD as claimed in claim 1, it is characterized in that exporting this first pixel electrode of corresponding each those pixel of this first pixel voltage drive, on respect to one first skew direction of this first display panel, to show that required pixel image makes this parallel one first phase delay that is produced by this first liquid crystal layer and this second liquid crystal layer along this first skew direction backlight backlight have a fixed proportion with one second phase delay and concerns by this data driver.
4. LCD as claimed in claim 1 is characterized in that this first pixel voltage equals this second pixel voltage, and this fixed proportion pass is 1: 1.
5. LCD as claimed in claim 1, it is characterized in that this data driver also in order to this second pixel electrode of exporting corresponding each those pixel of one second pixel voltage drive to carry out this narrow visual angle operator scheme.
6. LCD as claimed in claim 1 is characterized in that this data driver also drives this second pixel electrode of corresponding each those pixel to carry out this narrow visual angle operator scheme in order to export a gray scale voltage.
7. LCD as claimed in claim 1 is characterized in that this first skew direction is perpendicular to this first display panel direction.
8. LCD as claimed in claim 1, the distance that it is characterized in that this first liquid crystal layer and this second liquid crystal layer is less than 2mm.
9. method of adjusting the liquid crystal display displays visual angle, this LCD comprises a backlight assembly,, one first display panel one backlight and one second display panel in order to produce, this first display panel comprises a plurality of first pixel electrodes of corresponding a plurality of pixels, this second display panel comprises a plurality of second pixel electrodes of corresponding those pixels, and this method comprises:
Drive this first pixel electrode of corresponding each pixel to carry out a wide viewing angle operator scheme with a gray scale voltage; And
Make the pixel image that shows corresponding those pixels on one first skew direction of this first display panel relatively with this first pixel electrode of corresponding each those pixel of a pixel voltage drive to carry out a narrow visual angle operator scheme.
10. method as claimed in claim 9, the step that it is characterized in that carrying out this narrow visual angle operator scheme also comprises those second pixel electrodes with corresponding those pixels of this pixel voltage drive.
11. method as claimed in claim 9 is characterized in that the step of carrying out this narrow visual angle operator scheme also comprises this second pixel electrode that drives corresponding those pixels with this gray scale voltage.
12. method as claimed in claim 9 is characterized in that this first pixel electrode of exporting corresponding each pixel of this gray scale voltage driving by this data driver makes that this one first phase delay or one second phase delay that is produced via this first liquid crystal layer or this second liquid crystal layer of correspondence backlight is zero.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101681577B (en) * | 2007-07-19 | 2011-08-24 | 夏普株式会社 | Display and view angle control element employed therein |
| CN101573651B (en) * | 2007-01-31 | 2011-08-24 | 夏普株式会社 | Liquid crystal panel for controlling view angle and display |
| CN102256072A (en) * | 2010-05-20 | 2011-11-23 | 日立民用电子株式会社 | Video display device |
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| KR100193987B1 (en) * | 1996-05-11 | 1999-06-15 | 구자홍 | Driving circuit-integrated liquid crystal display device and manufacturing method |
| JP4396031B2 (en) * | 2000-12-26 | 2010-01-13 | カシオ計算機株式会社 | Display panel and substrate bonding method |
| KR100757794B1 (en) * | 2001-09-03 | 2007-09-11 | 삼성전자주식회사 | Liquid crystral display module and liquid crystal display device having the same |
| JP2003280540A (en) * | 2002-03-25 | 2003-10-02 | Sharp Corp | Electronic equipment |
| CN1209665C (en) * | 2002-04-27 | 2005-07-06 | 友达光电股份有限公司 | Light-conducting board with controlled lighting angle and its LCD |
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2005
- 2005-01-11 CN CNB2005100041892A patent/CN100351684C/en not_active Expired - Fee Related
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| CN1949349B (en) * | 2005-10-13 | 2011-11-23 | 乐金显示有限公司 | Liquid crystal display device and driving method thereof |
| CN101573651B (en) * | 2007-01-31 | 2011-08-24 | 夏普株式会社 | Liquid crystal panel for controlling view angle and display |
| CN101681577B (en) * | 2007-07-19 | 2011-08-24 | 夏普株式会社 | Display and view angle control element employed therein |
| CN102256072A (en) * | 2010-05-20 | 2011-11-23 | 日立民用电子株式会社 | Video display device |
| WO2019127711A1 (en) * | 2017-12-26 | 2019-07-04 | 惠州市华星光电技术有限公司 | Display panel and display device |
| CN108919570A (en) * | 2018-04-02 | 2018-11-30 | 友达光电股份有限公司 | Display device |
| CN108919570B (en) * | 2018-04-02 | 2021-06-25 | 友达光电股份有限公司 | Display device |
| CN110579918A (en) * | 2018-06-08 | 2019-12-17 | 深圳Tcl新技术有限公司 | liquid crystal display device and control method and application thereof |
| WO2020233463A1 (en) * | 2019-05-17 | 2020-11-26 | 京东方科技集团股份有限公司 | Display module, display device and view switching method |
| US11442299B2 (en) | 2019-05-17 | 2022-09-13 | Chongqing Boe Optoelectronics Technology Co., Ltd. | Display module, display device and viewing-angle switching method |
| WO2022156406A1 (en) * | 2021-01-20 | 2022-07-28 | 惠科股份有限公司 | Display method for display panel, display panel, and display device |
| US11763767B2 (en) | 2021-01-20 | 2023-09-19 | HKC Corporation Limited | Display method of display panel, display panel and display device |
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