CN1357785A - Display unit of LCD - Google Patents
Display unit of LCD Download PDFInfo
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- CN1357785A CN1357785A CN 00135363 CN00135363A CN1357785A CN 1357785 A CN1357785 A CN 1357785A CN 00135363 CN00135363 CN 00135363 CN 00135363 A CN00135363 A CN 00135363A CN 1357785 A CN1357785 A CN 1357785A
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Abstract
The display unit of LCD includes liquid crystal molecule holding space and at least one pair of end-to-end electrodes. The liquid crystal molecule holding space is between two transparent base boards and is arranged in preset crystal molecule arranging mode. The said electrode pair is inside the liquid crystal molecule holding space and there is one distance between the ends of the two electrodes so as to provide one electrical field for altering the direction of the liquid molecules in the space. The display unit of the present invention can meet the requirement of both wide FOV and high opening rate for high quality LCD.
Description
The present invention relates to a kind of display unit of LCD of wide viewing angle.Be particularly related to a kind of display unit with infinite a plurality of block (domain).
Along with the development of display (monitor) and mobile computer (notebook), it is increasing that the market of LCD also becomes.When large scale and high-resolution LCD will replace the desktop display, wide viewing angle and high reaction velocity be LCD the demand that must reach.And except by the color contrast that different visual angles influenced, the GTG degree of presenting of LCD, color saturation and light reaction degree etc. all are very important problems.Certainly, except designing a high-quality LCD, often the manufacturing cost of LCD also must be considered.
Most of traditional LCD be 90 degree reverse (twisted) to row formula (nematic) LCD.Twisted nematic formula LCD includes a LCD panel and two staggered Polarizers (polarizer) that are attached to LCD panel both sides.Well known, the shortcoming of traditional LCD is the chromatic dispersion of narrow visual angle (vertical direction is ± 30 degree for ± 40 degree horizontal directions), very slow reaction velocity (approximately 50ms) and height.So it is very difficult will making high-quality LCD.Simultaneously, when volume production, friction (rubbing) processing procedure of control LCD alignment also might cause static discharge to destroy and particle contamination to LCD.
For the demand of the wide viewing angle of tackling LCD, the vertical orientation LCD with multiple block structure has been suggested.So the LCD panel has diffuser plate and staggered Polarizer to be attached to LCD panel both sides.Liquid crystal in each block will have the different vertical orientation of a little angle along with the difference of block.So, wide viewing angle and low chromatic dispersion just can be reached.In addition, because do not need the friction processing procedure, static discharge will destroy and the problem of particle contamination so this LCD will not have.
The multiple block structure that many kinds of display units have been arranged at present.For example, IBM (internationalbusiness machine) has just proposed a kind of ridge side effect vertical orientation (ridge and fringe fieldhomeotropic aligned) structure.As shown in Figure 1, projection (bump) structure of Y and anti-Y type is formed on the centre position of pixel electrode.And the vertical orientation structure of the multiple block of Fujitsu as shown in Figure 2, has W type projection to be located on the upper and lower base plate.Though the friction processing procedure can omit,, also can increase the cost on the processing procedure in the structure that upper and lower base plate is produced projection.In addition, projection and electrode all are located at the central authorities of pixel, so will lower the aperture opening ratio (aperture) of display unit.
IPS (in-plane switching) LCD of pattern also has the structure of the multiple block of many kinds.Its essence spirit all is to become many blocks with electrode cutting in display unit, and each block is when applying voltage, and liquid crystal arrangement direction wherein can have a little difference along with the difference of block, reaches the purpose of wide viewing angle with this.But, because electrode is to be located in the display unit, so can reduce passing through of light.It is little that just known IPS mode LCD has aperture opening ratio, the problem that brightness is not enough.
In view of this, fundamental purpose of the present invention is to provide a kind of display unit with high aperture and infinite a plurality of blocks, can reach the purpose of super wide viewing angle and high aperture.
According to above-mentioned purpose, the present invention proposes a kind of display unit of LCD.Display unit of the present invention includes a liquid crystal molecule spatial accommodation and at least one pair of end points electrode to end points (end-to-end).The liquid crystal molecule spatial accommodation is sandwiched between two transparency carriers, takes in a plurality of liquid crystal molecules of arranging in a default Liquid Crystal Molecules Alignment mode.These electrodes approximately are located at the plane of this liquid crystal molecule spatial accommodation, between a distance is arranged, provide an electric field to change the direction of the liquid crystal molecule in this liquid crystal molecule spatial accommodation in order to plane at this liquid crystal molecule spatial accommodation.
For realizing described purpose, the invention provides a kind of display unit of LCD, include: one first transparency carrier; One second transparency carrier, this second transparency carrier are relative with this first transparency carrier, have a liquid crystal molecule spatial accommodation between this first transparency carrier and this second transparency carrier; A plurality of liquid crystal molecules are accommodated in this liquid crystal molecule spatial accommodation, and these a plurality of liquid crystal molecules are arranged in a default Liquid Crystal Molecules Alignment mode; One first electrode is located in this liquid crystal molecule spatial accommodation, and this first electrode has one first end points; And one second electrode be located in this liquid crystal molecule spatial accommodation, and this second electrode has one second end points, has a discharging gap between this first end points and this second end points, when adding a voltage difference between this first electrode and this second electrode the time, can provide an electric field to change the orientation of these a plurality of liquid crystal molecules in this liquid crystal molecule spatial accommodation at this liquid crystal molecule spatial accommodation.
Before added electric field not, the Liquid Crystal Molecules Alignment mode in the display unit of the present invention can be vertical orientation or horizontal direction matching, and display unit just of the present invention can be IPS pattern or VA (verticalaligned) pattern.
The invention has the advantages that end points can produce an electric field that changes along with the position difference to the electrode pair of end points.If with a known idea that direction of an electric field promptly is a block, the present invention promptly provides infinite a plurality of electric field.Therefore, can reach the purpose of super wide viewing angle.On the other hand, electrode has only occupied the fraction of display unit, so aperture opening ratio can significantly increase, increases the brightness of LCD panel.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent,, and in conjunction with the accompanying drawings, elaborate below especially exemplified by a preferred embodiment.
Fig. 1 is a kind of synoptic diagram of known ridge side effect vertical orientation structure;
Fig. 2 is the synoptic diagram of the vertical orientation structure of a multiple block;
Fig. 3 is the stereographic map of the display unit of LCD of the present invention;
Fig. 4 A is the top view of Fig. 3;
Fig. 4 B is the sectional view along bb ' line of Fig. 4 A;
Fig. 4 C is the sectional view along aa ' line of Fig. 4 A;
Fig. 5 A is for to implement display unit of the present invention with horizontal direction matching, at the electrode pair Liquid Crystal Molecules Alignment synoptic diagram during making alive not;
Fig. 5 B applies Liquid Crystal Molecules Alignment synoptic diagram behind the voltage for Fig. 5 A;
Fig. 6 A is for to implement display unit of the present invention with vertical orientation, at the electrode pair Liquid Crystal Molecules Alignment synoptic diagram during making alive not;
Fig. 6 B applies Liquid Crystal Molecules Alignment synoptic diagram behind the voltage for Fig. 6 A;
Fig. 7 A to Fig. 7 D is 4 kinds of possible electrode pair figures of the present invention;
Fig. 8 A is that the present invention is with many top views that electrode pair is implemented;
Fig. 8 B is the diagrammatic cross-section of the aa ' line in Fig. 8 A;
Fig. 9 A is placed on the embodiment of display unit middle part for the electrode pair among the present invention;
Fig. 9 B is positioned over the embodiment in four corners of display unit for the electrode pair among the present invention;
The synoptic diagram that Figure 10 A to Figure 10 B implements with two orthogonal electrode pairs for the present invention;
Figure 11 A to 11B is an another kind of electrode configuration mode of the present invention; And
Figure 12 is a kind of schematic perspective view of electrode pair of display unit of the present invention.
Fig. 3 is the stereographic map of the display unit of LCD of the present invention; Fig. 4 A is the top view of Fig. 3; Fig. 4 B is the sectional view along bb ' line of Fig. 4 A; And Fig. 4 C is the sectional view along aa ' line of Fig. 4 A.Display unit 10 of the present invention includes two transparency carriers 12 and 14, one liquid crystal molecule spatial accommodation 16 and pair of electrodes 18.Polarizer and diffuser plate etc. can be sticked in the transparency carrier 12 and 14 the outside, and liquid crystal molecule spatial accommodation 16 is sandwiched between transparency carrier 12 and 14, to take in a plurality of liquid crystal molecules 17.And electrode pair 18, comprise two electrodes (18a, 18b); This two electrode 18a, 18b is arranged in this liquid crystal molecule spatial accommodation 16 in the mode of end points to end points.This two electrode 18a has a distance between 18b.When applying bias in this two electrode 18a, when 18b is last, can provide an electric field at this liquid crystal molecule spatial accommodation 16, to change the orientation of the liquid crystal molecule in the liquid crystal molecule spatial accommodation 16.
That is the display unit 10 of the disclosed LCD of the present invention includes first transparency carrier 12 and second transparency carrier 14.This second transparency carrier 14 is relative with this first transparency carrier 12, and this first transparency carrier 12 and 14 of this second transparency carriers have liquid crystal molecule spatial accommodation 16.A plurality of liquid crystal molecules 17 are arranged in this liquid crystal molecule spatial accommodation 16 with " default arrangement mode ".The first electrode 18a is located on this second transparency carrier 14, and this first electrode 18a has the first end points 19a; And second electrode 18b be located on this second transparency carrier 14, and this second electrode has one second end points 19b.Has discharging gap 20 between this first end points 19a and this second end points 19b.When the impressed voltage difference is between this first electrode 18a and this second electrode 18b, can form electric field at this liquid crystal molecule spatial accommodation 16; Utilize this electric field to change the orientation of these a plurality of liquid crystal molecules 17 in this liquid crystal molecule spatial accommodation 16.When this " default arrangement mode ", liquid crystal molecule 17 major axis are in this first transparency carrier 12 or the 14 lip-deep orientations of this second transparency carrier, can be and the Surface Vertical of this first transparency carrier 12 or this second transparency carrier 14 or parallel.
Fig. 5 A is for to implement display unit of the present invention with horizontal direction matching, when electrode pair not during impressed voltage, and the schematic top view that liquid crystal molecule 17 is arranged.Fig. 5 B is then for after Fig. 5 A applies voltage, the schematic top view of Liquid Crystal Molecules Alignment.
The present invention can apply to the LCD of IPS pattern.The dielectric coefficient difference Δ ε (=ε ∥-ε ) that supposes liquid crystal is greater than zero, and just the major axis of liquid crystal molecule can be consistent with the direction of electric field.When electrode pair 18 did not add voltage, the major axis of liquid crystal molecule was prolonging the direction of friction originally on substrate surface, presents horizontal direction matching, shown in Fig. 5 A.When electrode pair 18 added voltage, liquid crystal molecule spatial accommodation 16 will produce an electric field.By in the general electromagnetics as can be known, the electric field that electrode pair 18 is produced will present American football shape shown in the dotted line among Fig. 5 B.Electric field has produced the liquid crystal molecule in the liquid crystal molecule spatial accommodation 16 and turns to, and then makes light can penetrate liquid crystal molecule spatial accommodation 16.
By among Fig. 5 B as can be known, the Liquid Crystal Molecules Alignment direction in the liquid crystal molecule spatial accommodation 16 will be different and different along with the direction of electric field.If represent a block with a known direction of an electric field, display unit 10 of the present invention will cause the liquid crystal arrangement block of infinite a plurality of different directions; The liquid crystal arrangement block of how different more direction then means: watch this liquid crystal display from different visual angles, then the otherness of visual effect that naked eyes are experienced can reduce.Therefore display unit of the present invention has super wide visual angle.On the other hand, electrode pair 18 of the present invention only occupies the very little zone of display unit 10, so the light penetration amount that this electrode pair 18 is covered is lower.Therefore, will form multiple block with known IPS mode LCD and compare down with the electrode cutting display unit, the present invention can significantly improve aperture opening ratio.
Fig. 6 A is for to implement display unit of the present invention with vertical orientation, when electrode pair not during impressed voltage, and the cross-sectional schematic that liquid crystal molecule 17 is arranged.When Fig. 6 B then applies voltage for Fig. 6 A, the cross-sectional schematic of Liquid Crystal Molecules Alignment.
The present invention can apply to the LCD of VA (vertical aligned) pattern.The dielectric coefficient difference Δ ε (=ε ∥-ε ) that supposes liquid crystal is greater than zero, and just the major axis of liquid crystal molecule can be consistent with the direction of electric field.As shown in Figure 6A, when electrode pair 18 did not add voltage, the surface that the major axis of liquid crystal molecule 17 is prolonging transparency carrier presented vertical orientation.Shown in Fig. 6 B, when electrode pair 18 added voltage, liquid crystal molecule spatial accommodation 16 will produce an electric field.Can learn that by general electromagnetic theory the electric field that electrode pair 18 is produced will present the figure that boss rises shown in the dotted line among Fig. 6 B.Electric field has produced the liquid crystal molecule 17 in the liquid crystal molecule spatial accommodation 16 and turns to, and then makes light can penetrate liquid crystal molecule spatial accommodation 16.
Except the benefit as the super wide viewing angle of Fig. 5 A and Fig. 5 B and high aperture, embodiments of the invention will have a benefit that reaction velocity is high among Fig. 6 A.Known to the personage who is familiar with LCD, if the horizontal direction of carrying out shown in Fig. 5 A and 5B is reversed, the reaction velocity of liquid crystal molecule is approximately 50-60ms; If carry out reversing between the vertical and horizontal direction shown in Fig. 6 A and 6B, then its reaction velocity is approximately about 5ms.
As far as possible can be average in order to reach in the brightness at each visual angle, so except the condition of end points to end points, the shape of electrode pair also must suitable being designed.Fig. 7 A to Fig. 7 D is 4 kinds of possible electrode pair figures.Basically, it is consistent that the profile of two electrode pairs is preferably wanted, two an electrode symmetries horizontal center line H therebetween just, and this is the consideration for the above-below direction visual angle.On the other hand, consider that for the visual angle of left and right directions itself preferably wants left-right symmetric each electrode, promptly is to be symmetrical in two-end-point to link formed vertical center line V.
Each display unit also can have how right to parallel end points opposite end point electrode, shown in Fig. 8 A and Fig. 8 B.Fig. 8 A is that the present invention is with many top views that electrode pair is implemented.Fig. 8 B is the diagrammatic cross-section of the aa ' line in Fig. 8 A.By the dotted line of representing electric field among the figure as can be known, each right electrode pair can provide the benefit of super wide viewing angle.
Fig. 9 A is placed on the embodiment of display unit middle part for the electrode pair among the present invention.Fig. 9 B is positioned over the embodiment in four corners of display unit for the electrode pair among the present invention.Except image pattern 9A is positioned over electrode pair the display unit central part, the present invention also the electrode pair among Fig. 9 A can prolonged end points to the line of end points to cutting when forming two electrodes, just form four electrodes, and be arranged at four corners of display unit respectively, shown in Fig. 9 B.In comparison, the embodiment of Fig. 9 B has following two advantages at least than the embodiment of Fig. 9 A.
1. high aperture: since general display unit around have a horizontal or vertical lead be set, this horizontal or vertical lead can form a non-photic zone 30, shown in Fig. 9 A, but not photic zone 30 all can lower aperture opening ratio.Electrode is located at the corner, and shown in Fig. 9 B, just the position that originally relatively can be hidden by non-photic zone 30 just more can not have influence on aperture opening ratio; And
2. electric field does not have influence on contiguous display unit: by the electric field among Fig. 9 A (dotted line) as can be known, it is open electric field.If the electrode pair as the display unit of Fig. 9 A applies voltage, about the electrode pair of two display units do not apply voltage, its electric field will be shown in Fig. 9 A.So, the liquid crystal molecule spatial accommodation of two display units is subjected to the influence of central display and a little printing opacity easily about.Yet, if display unit with Fig. 9 B structure fabrication, the formed electric field of the electrode pair of central display will be completely cut off by the electrode pair of left and right sides display unit and can't be expanded to contiguous display unit, shown in Fig. 9 B.Therefore, more can not have influence on contiguous display unit.
Shown in Figure 10 A top view and Figure 10 B cut-open view, the present invention can also use two pairs electrode pair-electrode pair 32 and electrode pair 34; These two pairs of electrode pairs are located in the liquid crystal molecule spatial accommodation 16, and are respectively formed on top glass substrate 12 and the lower glass substrate 14.The voltage that each electrode applied is all different, as shown on Figure 10 be respectively 7V, 5V ,-5V and-7V.Utilize the potential difference (PD) between per two electrodes all different,, make liquid crystal molecule 17 in the liquid crystal molecule spatial accommodation 16 to different directions deflection to produce the electric field of irregular direction.
Shown in Figure 11 A top view and Figure 11 B cut-open view, the shape of electrode pair of the present invention, position can be along with the convenience changes on design and the processing procedure.Electrode 18a among Figure 11 A, 18b is respectively two block type electrodes; And shown in Figure 11 B, electrode 18a is located on the lower glass substrate 12, and electrode 18b establishes on the top glass substrate 14.
In order to make tridimensional electric field more even or symmetrical, also can on the three-dimensional shape of electrode, modify.Figure 12 is a kind of schematic perspective view of electrode pair of display unit of the present invention.Electrode pair among Figure 12, the thinner thickness at two electrode 18a and the immediate end points of 18b place, and thicker in two electrode 18a and 18b apart from the thickness of farthest.Just, so the electrode pair of shape will more complicated on processing procedure.
Generally speaking, the present invention produces infinite a plurality of block with the electrode pair of an end points to end points.Can reach the demand of wide viewing angle, high aperture and the high brightness of high-quality LCD simultaneously.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention should be with being as the criterion that the claim scope is defined.
Claims (11)
1. the display unit of a LCD includes:
One first transparency carrier;
One second transparency carrier, this second transparency carrier are relative with this first transparency carrier, have a liquid crystal molecule spatial accommodation between this first transparency carrier and this second transparency carrier;
A plurality of liquid crystal molecules are accommodated in this liquid crystal molecule spatial accommodation, and these a plurality of liquid crystal molecules are arranged in a default Liquid Crystal Molecules Alignment mode;
One first electrode is located in this liquid crystal molecule spatial accommodation, and this first electrode has one first end points; And
One second electrode is located in this liquid crystal molecule spatial accommodation, and this second electrode has one second end points, has a discharging gap between this first end points and this second end points,
When adding a voltage difference between this first electrode and this second electrode the time, can provide an electric field to change the orientation of these a plurality of liquid crystal molecules in this liquid crystal molecule spatial accommodation at this liquid crystal molecule spatial accommodation.
2. display unit as claimed in claim 1, wherein, this default liquid crystal molecule is to be homeotropic alignment at the lip-deep arrangement mode of transparency carrier, and this liquid crystal molecule has a major axis, and this major axis is approximately perpendicular to the surface of this first transparency carrier.
3. display unit as claimed in claim 1, wherein, this default liquid crystal molecule is to be homeotropic alignment at the lip-deep arrangement mode of transparency carrier, and this liquid crystal molecule has a major axis, and this major axis is approximately perpendicular to the surface of this second transparency carrier.
4. display unit as claimed in claim 1, wherein, should default Liquid Crystal Molecules Alignment mode be for horizontally, this liquid crystal molecule has a major axis, and this major axis approximately is parallel to the surface of this first transparency carrier and links formed straight line perpendicular to this first end points and this second end points.
5. display unit as claimed in claim 1, wherein, should default Liquid Crystal Molecules Alignment mode be for horizontally, this liquid crystal molecule has a major axis, and this major axis approximately is parallel to the surface of this second transparency carrier and links formed straight line perpendicular to this first end points and this second end points.
6. display unit as claimed in claim 1, wherein, this first electrode and this second electrode profile is symmetrical in this first end points and this second end points links formed straight line.
7. display unit as claimed in claim 1, wherein, this display unit includes many electrodes to end points opposite end point, to being located at abreast on this second transparency carrier.
8. display unit as claimed in claim 1, wherein, this display unit is approximately the structure of cubic type, include two symmetrical limits, this display unit includes the electrode of two pairs of end points opposite end points, wherein, the electrode of a pair of end points opposite end point is located on one side, and another electrode to end points opposite end point is located at another side.
9. display unit as claimed in claim 1, wherein, this display unit includes the electrode of two pairs of end points opposite end points, and the electrode of these two pairs of end points opposite end points is located at first transparency carrier in this liquid crystal molecule spatial accommodation and the plane of second transparency carrier respectively.
10. display unit as claimed in claim 7, wherein, the electrode of these two pairs of end points opposite end points when this electric field is provided, without any the voltage of two electrodes for equating.
11. display unit as claimed in claim 1, wherein, this first electrode is located on this first transparency carrier, and this second electrode is located on this second transparency carrier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001353632A CN1146752C (en) | 2000-12-12 | 2000-12-12 | Display unit of LCD |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001353632A CN1146752C (en) | 2000-12-12 | 2000-12-12 | Display unit of LCD |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1357785A true CN1357785A (en) | 2002-07-10 |
| CN1146752C CN1146752C (en) | 2004-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001353632A Expired - Lifetime CN1146752C (en) | 2000-12-12 | 2000-12-12 | Display unit of LCD |
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| Country | Link |
|---|---|
| CN (1) | CN1146752C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005093811A1 (en) * | 2004-03-29 | 2005-10-06 | Quanta Display Inc. | Method for manufacturing self-aligned thin film transistor |
| CN103635857A (en) * | 2011-07-25 | 2014-03-12 | 西铁城控股株式会社 | Optical device, projector, production method, and production support device |
-
2000
- 2000-12-12 CN CNB001353632A patent/CN1146752C/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005093811A1 (en) * | 2004-03-29 | 2005-10-06 | Quanta Display Inc. | Method for manufacturing self-aligned thin film transistor |
| CN103635857A (en) * | 2011-07-25 | 2014-03-12 | 西铁城控股株式会社 | Optical device, projector, production method, and production support device |
| US9285601B2 (en) | 2011-07-25 | 2016-03-15 | Citizen Holdings Co., Ltd. | Optical device, projector, manufacturing method, and manufacturing support apparatus |
| CN103635857B (en) * | 2011-07-25 | 2017-12-15 | 西铁城时计株式会社 | Optics, projector, manufacture method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1146752C (en) | 2004-04-21 |
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Granted publication date: 20040421 |