CN101299118B - Vertical alignment type liquid crystal display device and electronic apparatus - Google Patents
Vertical alignment type liquid crystal display device and electronic apparatus Download PDFInfo
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- CN101299118B CN101299118B CN2008100938276A CN200810093827A CN101299118B CN 101299118 B CN101299118 B CN 101299118B CN 2008100938276 A CN2008100938276 A CN 2008100938276A CN 200810093827 A CN200810093827 A CN 200810093827A CN 101299118 B CN101299118 B CN 101299118B
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Abstract
The invention discloses a vertical arrangement LCD and an electronic device, wherein slit parts are formed on an upper electrode and a lower electrode of an upper substrate and lower substrate, thereby preventing the core from moving caused by the inclination of liquid crystal molecules, furthermore preventing the optical characteristic from deteriorating. Liquid crystal molecules are clamped between the upper substrate and the lower substrate substrate; two slit parts have overlapped part. Particularly, through the structure, the movement of the core of the slit part of an MVA type electrode, or the connecting part and an adjacent part of a VA type pixel and a second pixel part is prevented.
Description
Technical field
The present invention relates to multizone (multidomain) LCD, and be particularly related to the multi-zone liquid crystal display that image shows that warp improves.
Background technology
Now, so that the flat-panel screens of the image that is equal to CRT to be provided, liquid crystal indicator is used in the picture of personal computer, TV, portable phone, various OA machines etc., thereby can expect that market further enlarges.
Generally speaking, liquid crystal indicator is to constitute by between two plate bases, injecting liquid crystal and regulating the structure that puts on this electric field intensity and regulate the light transmission amount.Among the liquid crystal indicator, vertical orientation (Vertically aligned; VA) liquid crystal indicator of mode has and is formed with transparency electrode at medial surface and disposes a pair of transparency carrier of Polarizer at lateral surface.Filling dielectric constant anisotropy is negative liquid crystal material between two transparency carriers, in case to electrode application voltage, then can produce electric field in the direction vertical with substrate, and the major axis of the liquid crystal molecule tendency direction vertical with electric field.Thus, in the liquid crystal indicator of VA type, though make in the liquid crystal molecule steering horizontal direction of substrate vertical orientation to change transmitance through the vertical electric field that applies vertical direction; But also the someone proposes multiregional vertical align (MVA type), that is in 1 pixel, the direction of liquid crystal molecules tilt is controlled on a plurality of directions.
Realizing the method for MVA type, the someone propose pixel electrode be provided with projection method, with the method that slit is set in pixel electrode portion.In the method for projection is set, do not applying under the state of voltage, orientation can the rough inclination along with the formation of projection in the liquid crystal molecule of vertical direction.The vergence direction of the liquid crystal molecule in the time of therefore, can voltage being applied is controlled at certain direction.In the method for slit portion was set, when applying voltage, the liquid crystal molecule that is positioned at slit portion can be the state of rough inclination with respect to direction of an electric field, and can reproduce the state identical with the situation that projection is set.
The alignment direction of the liquid crystal molecule when Fig. 4 a illustrates voltage under the situation of the electrode of the liquid crystal indicator that slit portion is arranged at known MVA type and applies.Though slit portion 45,46 etc. is arranged at the optional position of upper/lower electrode, but its position is not overlapping at upper/lower electrode.Shown in Fig. 4 a,, and can utilize the vergence direction of liquid crystal molecule to change to reach multizoneization at the slit portion periphery through variation because of the caused direction of an electric field of influence of slit portion.
In the method for slit portion is set, owing to can not produce electric field at slit portion, so liquid crystal molecule is homeotropic alignment haply.This is because under the very wide situation of slit portion, liquid crystal molecule can become greatly in the zone of the direction orientation vertical with substrate, and the transmitance of this part is approximately near 0, so the transmitance step-down.Therefore, generally speaking, the tendency that has the width (area) that makes slit portion to diminish; But in case the width of slit portion is contracted very for a short time words; Then between slit portion, also can produce electric field, the liquid crystal molecule on the slit portion can tilt toward the parallel direction of substrate, and receives near the influence of LCD alignment; For example, the liquid crystal molecule on the slit portion is as Fig. 4 b and orientation.Liquid crystal is tilted by left and right directions, and produces the core (core) 48 of liquid crystal orientation vertically in core.This core 48 causes in response to the size of slit portion width and applies variation in voltage and move, and causes the bad problem on the optical characteristics such as image is coarse.
In addition, be not limited to the MVA type, generally speaking; In the LCD of vertical orientation type, for example, in the connecting portion of each pixel, adjacency section etc.; Upper/lower electrode wherein one has the part that lacks, in this part, owing to become the cause with the slit portion same configuration of the electrode of above-mentioned MVA type; Therefore, in the zone that lacks electrode (slit portion), can form the different zone of direction of an electric field.Thus, in the different zone of alignment direction that forms liquid crystal molecule, its borderline region can form the core with the same liquid crystal alignment of above-mentioned MVA.In the connecting portion of each pixel, adjacency section etc., as stated and the core that produces can under the mobile situation, still can cause bad on the optical characteristics because applying the change of voltage.
Fig. 5 a illustrates the connecting portion 502 of the pixel 500 of vertical alignment liquid crystal display device.Fig. 5 b illustrates the electrode structure of the section that is positioned at X-X ' line.Since the only residual connection electrode 54 of above-mentioned connecting portion, and other part becomes the slit portion 55 of electrode, therefore can produce the electric field shown in the arrow of Fig. 5 b.According to the size that applies voltage, and because the influence of illustrated electric field etc. can produce core on connecting portion.But on connecting portion, the direction vertical with substrate can produce electric field, and this electric field and illustrated electric field effects with apply voltage one and change, the position of core is moved.
Fig. 5 c illustrates the core position in connecting portion and adjacency section generation.Shown in Fig. 5 c, core 59 is the interval generations with equalization.But, dwindle fully and under the situation that produces core on the connecting portion, because apply the variation of voltage, core can be mobile toward transverse direction (direction of arrow shown in Fig. 5 c) at the slit portion between pixel.Each pixel in same panel surface produces under the situation about moving of core at random, can cause bad optical characteristics.
In order to solve the problems referred to above that are positioned at connecting portion and adjacency section,, can cause aperture opening ratio to reduce though consider the slit portion width between pixel is enlarged fully.Therefore in addition,, become and to append circuit or change voltage applies order, can become the main cause that cost such as complex designization increases though also consider to apply the improvement method of different voltages in pixel adjacent.
[special permission document 1] spy opens the 2005-316211 communique
[non-special permission document 1] Jung-Hee Son, Seong-Wook Choi et.al. " A novel design ofthe Slit pattern On the Patterned Vertical Alignment (PVA) mode " IDW ' 06,141-144
Summary of the invention
The objective of the invention is to: in vertical alignment type liquid crystal display device, need not add the width (area) of the slit portion of large electrode, can be through the moving of the core that prevents to produce on the slit portion, and can prevent bad optical characteristics, to obtain harsh image.Especially; Through preventing moving of the connecting portion in the pixel of the slit portion of the electrode of MVA type or VA type and time pixel, core that the adjacency section produces; And can not reduce transmitance, in addition, must not append circuit or change voltage and apply sequential scheduling change design procedure; And can avoid bad optical characteristics, and obtain harsh image.
Structure of the present invention is described below.
(1) in vertical orientation type (MVA type) LCD, two electrodes up and down at two plate bases up and down that clip liquid crystal molecule form slit portion respectively, and two slit portions have the overlapped part in position.
(2) like (1) described vertical alignment type liquid crystal display device, its direction with lqiuid crystal molecule tipping is controlled at the multizone type of a plurality of directions.
(3) like (1) or (2) described vertical alignment type liquid crystal display device, one of them slit portion of the slit portion of two electrodes is positioned at the scope of another slit portion about wherein being somebody's turn to do, and little than the width and/or the area of another slit portion.
(4) like (1) described vertical alignment type liquid crystal display device, wherein: the overlapped part in the position of this two slit portion is arranged on the connecting portion and/or the adjacency section of pixel.
(5) like (4) described vertical alignment type liquid crystal display device, wherein be formed at respectively this up and down one of them of slit portion of two electrodes be set in place common electrode in connecting portion, and be the size and location of the connection electrode that comprises subtend.
(6) a kind of electronic installation has like arbitrary described vertical alignment type liquid crystal display device in (1)～(5), and wherein this electronic installation comprises PDA, notebook, carries with computing machine, mobile phone or monitor.
As previously discussed; The present invention is in vertical alignment type liquid crystal display device; Position through slit portion and this slit portion are set at upper/lower electrode is disposed at the lap position in upper/lower electrode; And the orientation core of liquid crystal molecule is fixed, and the moving of the core that prevents to produce because of the change that applies voltage, and avoid bad optical characteristics.Especially, through the position that comprises connection electrode and the slit portion of size are set on the common electrode of the pixel connecting portion of VA type, the moving of the core that can prevent to take place at connecting portion, and avoid bad optical characteristics.
According to the present invention, in the liquid crystal indicator of VA type, betide in the pixel when voltage is applied or the core of the liquid crystal alignment of the adjacency of each pixel and connecting portion is fixed; Even apply variation in voltage, can not show bad optical characteristics yet and harsh image can be provided.
For letting above-mentioned and other purposes of the present invention, characteristic and the advantage can be more obviously understandable, the hereinafter spy enumerates preferred embodiment, and conjunction with figs., elaborates as follows.
Description of drawings
Fig. 1 a illustrates the electrode structure of embodiment of the present invention.
Fig. 1 b illustrates the electrode structure of embodiment of the present invention.
Fig. 2 a illustrates the connecting portion of vertical alignment type liquid crystal display device.
Fig. 2 b is for showing the example of electrode structure of the present invention at the connecting portion of vertical alignment type liquid crystal display device.
Fig. 3 a illustrates the top view of the adjacency section of vertical alignment type liquid crystal display device.
Fig. 3 b illustrates the sectional view of the adjacency section of vertical alignment type liquid crystal display device.
Fig. 4 a illustrates the sectional view of slit portion of the liquid crystal indicator of MVA type.
Fig. 4 b illustrates the top view of slit portion of the liquid crystal indicator of MVA type.
Fig. 5 a illustrates the connecting portion of vertical alignment type liquid crystal display device.
Fig. 5 b illustrates the known electrode structure of the connecting portion of vertical alignment type liquid crystal display device.
Fig. 5 c illustrates the connecting portion of vertical alignment type liquid crystal display device and is positioned at the core of adjacency section.
Description of reference numerals
11～substrate; 12～substrate; 13～top pixels electrode; 14～lower pixel electrode; 15～the 1st slit portions; 16～the 2nd slit portions; 21～substrate; 22～substrate; 23～connection electrode; 24～common electrode; 25～slit portion; 26～slit portion; 31～pixel; 32～the 2nd slit portions; 33～substrate; 34～substrate; 35～electrode; 36～the 2nd slit portions; 41～substrate; 42～substrate; 43～electrode; 44～electrode; 45～slit portion; 46～slit portion; Liquid crystal on 47～slit portion; 48～core; 51～substrate; 52～substrate; 53～electrode; 54～electrode; 55～slit portion; Liquid crystal on 56～slit portion; 57～pixel; 58～connecting portion; 59～core; 102～pixel, 104 connecting portions.
Embodiment
Below, according to drawing example of the present invention is described.But the present invention is not as limit.
Fig. 1 a illustrates in the liquid crystal indicator of MVA type slit portion is arranged at upper and lower electrode 13,14.The 1st slit portion 15 is for when voltage applies, in the both sides of the 1st slit portion 15 in order to the slit portion of the multizoneization of the inclination that changes liquid crystal molecule.On the counter electrode 13 of this 1st slit portion 15,2nd slit portion 16 littler than the width of the 1st slit portion 15 is set, through weak electric field around can forming between these the 2nd slit portion 16, the 1 slit portions 15 and the 2nd slit portion 16.Therefore, can make near the core (17) of liquid crystal molecule homeotropic alignment fixing artificially.Therefore, the core of common generation is not moved because of the change of voltage, also not produce moving of core that the bad optical characteristics such as coarse because of image causes.
In this embodiment, though the 2nd slit portion 16 is positioned at the scope of the 1st slit portion 15, not as limit; If both have overlapping part, then can be fixed in the orientation core of this liquid crystal molecule of overlapping.For example, shown in Fig. 1 b,, lap 100 is arranged preferably though the position of the 2nd slit portion 16 and the 1st slit portion 15 squint to some extent.Preferably, shown in Fig. 1 a, in the scope of the 1st slit portion 15,, then can make the core immobilization if the width (area) of the 1st slit portion is diminished.
Fig. 2 a illustrates the connecting portion 104 of pixel 102 of the LCD of VA type; Fig. 2 b illustrates the sectional view that is positioned at connecting portion X-X ' line.In Fig. 2 b, have the slit portion 25 big than the width of connection electrode 23 in electrode 24 formation with connection electrode 23 subtends.Exist the part overlapping at this slit portion 25 with the slit portion of connection electrode 26.In case apply the words of voltage; Though liquid crystal molecule orientation shown in Fig. 2 b; But, the electric field in the zone on the connection electrode do not have the poor of power because becoming with the electric field that is positioned at its zone on every side; And the electric field of vergence direction produces at connecting portion periphery, so core 27 can be utilized the liquid crystal molecule zone that is positioned at two tilt orientations and fixes.
Though Fig. 3 a illustrates the adjacency section of pixel 31 of the LCD of VA type,, therefore form slit portion owing in the adjacency section, there is not electrode.Therefore, with Fig. 1 a and Fig. 1 b likewise, through with the electrode setting and the 2nd overlapping slit portion of slit portion position relation of slit portion subtend, can prevent moving of core.Shown in Fig. 3 b, the relation of width Y of the width X of the transparency electrode of pixel electrode substrate side and the 2nd slit portion 32,36 of the transparency electrode that is arranged at the common electrode substrate-side, the mode of relation that can be through satisfying X＞Y makes more stabilization of core.
More than; Though lack a part of electrode and the connecting portion, the adjacency section that exist the example of slit portion that each pixel is described with the single-sided electrode of vertical alignment type liquid crystal display device; But, therefore can know that the present invention is applicable to above-mentioned whole situation owing to have same problem with the situation that has slit portion at electrode.
According to the present invention, the electronic installation of the vertical alignment type liquid crystal display device that disposes above-mentioned structure can be provided.Electronic installation for example can be made PDA(Personal Digital Assistant), notebook, carry with running gears such as computing machine, mobile phone or monitors.Usually, electronic installation can comprise outer cover and DC/DC current transformer.In addition, the DC/DC current transformer can optionally be connected in display device, and output voltage is provided and is supplied to display device, to show portrait.
Claims (4)
1. vertical alignment type liquid crystal display device,
It is characterized in that:
In vertical alignment type liquid crystal display device, form slit portion at two electrodes up and down of two plate bases up and down that clip liquid crystal molecule respectively, and two slit portions have the overlapped part in position,
Wherein, the direction that said vertical alignment type liquid crystal display device belongs to lqiuid crystal molecule tipping is controlled at the multizone type on a plurality of directions, and the overlapped part in the position of this two slit portion to be arranged on each pixel inner,
One of them slit portion of the slit portion of two electrodes is positioned at the scope of another slit portion about wherein being somebody's turn to do, and little than the width and/or the area of another slit portion.
2. vertical alignment type liquid crystal display device,
It is characterized in that:
In vertical alignment type liquid crystal display device, form slit portion at two electrodes up and down of two plate bases up and down that clip liquid crystal molecule respectively, and two slit portions have the overlapped part in position,
Wherein the overlapped part in the position of this two slit portion is corresponding to the both sides of the connecting portion of pixel.
3. vertical alignment type liquid crystal display device as claimed in claim 2; Wherein, The very connection electrode that powers on, bottom electrode is a common electrode, connection electrode is positioned the connecting portion of pixel; Be formed at the connection electrode of the slit portion of this bottom electrode, and be the size and location that comprise the connection electrode of subtend corresponding to subtend.
4. an electronic installation has like any described vertical alignment type liquid crystal display device of claim 1 to 3, and wherein this electronic installation comprises personal digital assistant, notebook, carries with computing machine, mobile phone or monitor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007120629A JP4459251B2 (en) | 2007-05-01 | 2007-05-01 | Multi-domain LCD |
| JP120629/07 | 2007-05-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101299118A CN101299118A (en) | 2008-11-05 |
| CN101299118B true CN101299118B (en) | 2012-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100938276A Active CN101299118B (en) | 2007-05-01 | 2008-04-30 | Vertical alignment type liquid crystal display device and electronic apparatus |
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| Country | Link |
|---|---|
| JP (1) | JP4459251B2 (en) |
| CN (1) | CN101299118B (en) |
| TW (1) | TWI365337B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5432581B2 (en) * | 2009-04-27 | 2014-03-05 | スタンレー電気株式会社 | Liquid crystal display |
| JP2011215480A (en) | 2010-04-01 | 2011-10-27 | Stanley Electric Co Ltd | Liquid crystal display device |
| JP5774160B2 (en) * | 2014-05-23 | 2015-09-02 | スタンレー電気株式会社 | Liquid crystal display |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5808705A (en) * | 1995-06-22 | 1998-09-15 | Sharp Kabushiki Kaisha | Liquid crystal display apparatus with two viewing angle modes and drive electrodes for mode dependent selection |
-
2007
- 2007-05-01 JP JP2007120629A patent/JP4459251B2/en active Active
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2008
- 2008-04-30 TW TW097115890A patent/TWI365337B/en not_active IP Right Cessation
- 2008-04-30 CN CN2008100938276A patent/CN101299118B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5808705A (en) * | 1995-06-22 | 1998-09-15 | Sharp Kabushiki Kaisha | Liquid crystal display apparatus with two viewing angle modes and drive electrodes for mode dependent selection |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4459251B2 (en) | 2010-04-28 |
| TWI365337B (en) | 2012-06-01 |
| TW200912489A (en) | 2009-03-16 |
| JP2008275974A (en) | 2008-11-13 |
| CN101299118A (en) | 2008-11-05 |
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Owner name: QIMEI ELECTRONIC CO LTD Free format text: FORMER OWNER: TONGBAO OPTOELECTRONICS CO., LTD. Effective date: 20120215 |
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Effective date of registration: 20120215 Address after: Miaoli County, Taiwan, China Applicant after: Chimei Optoelectronics Co., Ltd. Address before: Hsinchu science industry zone, Taiwan, China Applicant before: Tongbao Optoelectronics Co., Ltd. |
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