CN101916010A - Fast response IPS-VA liquid crystal display with high transmissivity - Google Patents
Fast response IPS-VA liquid crystal display with high transmissivity Download PDFInfo
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- CN101916010A CN101916010A CN 201010229955 CN201010229955A CN101916010A CN 101916010 A CN101916010 A CN 101916010A CN 201010229955 CN201010229955 CN 201010229955 CN 201010229955 A CN201010229955 A CN 201010229955A CN 101916010 A CN101916010 A CN 101916010A
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Abstract
The invention provides a fast response IPS-VA liquid crystal display (FE-IPS-VA LCD) with high transmissivity, comprising two polaroids (a polarizer and an analyzer), two negative C films and a liquid crystal box. Light rays pass through the polarizer, the first negative C film, the liquid crystal box, the second negative C film and the analyzer in sequence. The liquid crystal box is in vertical alignment and comprises glass substrates, indium tin oxide electrodes (strip ITO electrodes), alignment layers, a liquid crystal layer, banding frame seal and a spacer, wherein the two glass substrates are arranged on the outermost layers; the strip ITO pixel electrode is arranged on the inner surface of the lower glass; the strip ITO common electrode is arranged on the inner surface of the upper glass; the alignment layers are arranged close to the strip ITO pixel electrode and the strip ITO common electrode; and the liquid crystal layer and the spacer are arranged in the middle. The LCD further reduces the threshold voltage while maintaining the excellent characteristics of the traditional IPS-VA LCDs and simultaneously greatly improves the response speed, thus having profound significance in solving the problem of image smear caused by slow response, and the LCD has simple and easy-to-realize process and is a novel LCD with excellent performance.
Description
Technical field
The invention belongs to the IPS-VA LCD (FR-IPS-VA LCD) of quick response and high permeability, be particularly related to the IPS-VA liquid crystal display pattern of a kind of quick response and high permeability, on the basis of traditional liquid crystal display pattern, with the pairing top glass substrate in center, lower glass substrate strip ITO pixel electrode gap on add strip ITO public electrode, the interelectrode oblique electric field of lower glass substrate strip ITO makes liquid crystal molecule quick slant in opening response process in the utilization, finally under the coplane effect of electric field, the molecule tilt state that reaches capacity.
Background technology
Coplane conversion vertical plane is arranged LCD (In-Plane Switching Vertical Alignment LCD), being called for short (IPS-VALCD), is the LCD of the horizontal component of electric field that electric potential difference the produced driving lqiuid crystal molecule tipping between the strip ITO pixel electrode that utilizes on the lower glass substrate.It has good wide viewing angle characteristics, can be widely used in the desktop computer display, large-size screen monitors LCD such as LCD TV.
It all is the strip ITO pixel electrode drive pattern that adopts on the lower glass substrate that traditional coplane conversion vertical plane is arranged LCD (IPS-VA LCD), electrode width and spacing are all bigger, transmitance is lower, threshold voltage big (～2.92V), response time slow (greater than 15ms), can cause the problem that drives difficulty and image streaking.
Summary of the invention
The objective of the invention is to solve the low and slow problem of response speed of conventional co-planar conversion vertical plane arrangement LCD transmitance, the LCD that a kind of high permeability is provided and responds fast.The invention belongs to a kind of coplane conversion vertical plane and arrange LCD (FR-IPS-VA LCD) with quick response and high permeability characteristic, (Traditional IP S LCD electrode width is 4 μ m when reducing electrode width and keeping electrode separation, electrode separation is 10 μ m), employing with the pairing top glass substrate in center, lower glass substrate strip ITO pixel electrode gap on add strip ITO public electrode, the interelectrode oblique electric field of lower glass substrate strip ITO has reached and has improved the purpose of opening response speed in the utilization, realized opening the raising of response speed more than 1 times, realize low threshold voltage and high permeability simultaneously, and kept conventional co-planar conversion vertical plane to arrange the wide viewing angle characteristics of LCD.
Technical solution of the present invention is as follows:
The IPS-VA LCD of a kind of quick response and high permeability, this LCD comprises: two polaroids (being divided into the polarizer and analyzer), two negative C films, liquid crystal cell; Its position relation is followed successively by: the polarizer, the first negative C film, liquid crystal cell, second negative C film and the analyzer; Light is successively by the polarizer, the first negative C film, liquid crystal cell, second negative C film and the analyzer.
Described liquid crystal cell is the liquid crystal cell that vertical plane is arranged, and comprising: glass substrate, indium-tin oxide electrode (strip ITO electrode), oriented layer, liquid crystal layer, envelope frame adhesive and sept; Close its position: outermost layer is two sheet glass substrates, and the lower-glass inside surface is a strip ITO pixel electrode, and the upper glass inside surface is a strip ITO public electrode, is oriented layer more inwards, and the centre is liquid crystal layer and sept.
Two strip ITO electrodes in the described liquid crystal cell are identical, be: electrode width is W=1～4 μ m, electrode separation is G=4～20 μ m, strip ITO electrode on the top glass substrate is positioned at top, lower glass substrate strip ITO electrode gap center, and adds the opposite voltage of electromotive force between lower glass substrate strip ITO electrode adjacent electrode (pixel 1 and pixel 2).
The preferred electrode width is W=1 μ m in the strip ITO electrode in the described liquid crystal cell on the last lower glass substrate inside surface, and electrode separation is G=9 μ m.
The thickness of liquid crystal layer is 4 μ m in the described liquid crystal cell, and the liquid crystal material parameter is: ε
//=14, ε
⊥=4, n
o=1.4794, n
e=1.6, K
11=10.87pN, K
22=9.5pN, K
33=15.37pN, γ
1=0.1Pas; The border strong anchoring, the pre-dumping angle of two substrates place liquid crystal and orientation angles all are 90 ° and 0 ° up and down.
Sept in the described liquid crystal cell is a spherical resin powder sept, and diameter is 4 μ m.
Oriented layer in the described liquid crystal cell is a polyimide film.
The thickness of described two negative C films is 21 μ m; The refractive index parameter is: n
e=1.483, n
o=1.493.
The described polarizer and analyzer are desirable polaroid.
The method for making of the IPS-VA LCD sample box of quick response recited above and high permeability, its step is as follows:
Step 5, last lower glass substrate are fitted and with the adhesive curing of edge sealing frame;
Step 7 is cleaned the glass surface and two the negative C films of fitting, and the polarizer and analyzer, obtains the IPS-VA LCD sample box of this quick response and high permeability at last.
Beneficial effect of the present invention is: use newly-designed FR-IPS electrode structure, the interelectrode oblique electric field of lower glass substrate strip ITO has realized improving the purpose of opening response speed in the utilization, transmitance and Traditional IP S-VA LCD are almost equal, threshold voltage has reduced 0.2V, contrast with Traditional IP S-VA LCD (dotted line) response time, identical liquid crystal material parameter and liquid crystal cell are thick, the rise time 8.03ms of Traditional IP S-VA LCD, fall time 6.32ms, the rise time 3.87ms of the IPS-VA LCD of quick response and high permeability, fall time, 6.28ms realized opening the raising of response speed more than 1 times.And by using two thickness to be 21 μ m, the refractive index parameter is n
e=1.483, n
o=1.493 negative C film carries out the film compensation, and the visual angle is identical with Traditional IP S LCD.The IPS-VA LCD of response and high permeability is in the good characteristic that has kept Traditional IP S-VA LCD fast, further reduced threshold voltage, response speed is greatly improved simultaneously, this has profound meaning to solving the image streaking problem that causes slowly owing to the response time, and being simple and easy on the technology realize, is a kind of Novel LCD of function admirable.
Description of drawings
Fig. 1 is the present invention's response and the IPS-VA LCD (b) of high permeability and traditional IPS-VA LCD (a) electrode structure and contrast of bright attitude liquid crystal molecule distribution schematic diagram fast.
Fig. 2 is that the quick response of the present invention is thick at identical liquid crystal parameter and liquid crystal cell with traditional IPS-VA LCD (dotted line) with the IPS-VA LCD (solid line) of high permeability, response time figure contrast.
Fig. 3 is the present invention's response and the IPS-VA LCD (dotted line) of high permeability and traditional IPS-VA LCD (solid line) transmitance and voltage relationship figure contrast fast.
Fig. 4 is the present invention's response and the IPS-VA LCD (b) of high permeability and traditional IPS-VA LCD (a) transmission region and light tight area planar figure contrast fast.
Fig. 5 be the present invention fast the contrast visual angle figure after IPS-VA LCD (b) and the traditional identical compensation of IPS-VA LCD (a) of response and high permeability contrast.
Embodiment
The method for making of the IPS-VA LCD sample box of quick response of the present invention and high permeability, make according to following steps:
Earlier on the ITO electro-conductive glass, apply photoresists, (lithography mask version is to make the black corresponding with electrode pattern on film to cover lithography mask version again, the clear area photoresist is reacted) under the effect of light, shine by ultraviolet light then, the ITO electrode layer is carried out the selective chemical corrosion, thereby on the ITO electro-conductive glass, obtain and the complete graph of a correspondence of mask.
On the good ITO electro-conductive glass of etching, be coated with alignment agent (polyamic acid solution), form uniform rete.Preliminary drying makes it volatilization with the heating of the solvent in the oriented material solution then, stays the oriented material rete of solid, solidifies 1～2 hour down at 300～350 ℃ then, and dehydration closed-loop generates polyimide film, has so just formed needed alignment films.
Use flannelette to a direction friction on alignment films, the liquid crystal molecule in the liquid crystal layer has the angle of a little inclination under the situation that vertical plane is arranged.
On lower glass substrate, spray the spherical resin powder with duster, form more evenly and distribute, control the spacing between two glass substrates, adopt method for printing screen to come silk-screen frame adhesive and conductiving point glue on the top glass substrate, be used for controlling the size of made liquid crystal device and the public electrode between the conducting upper and lower base plate.
Step 5, last lower glass substrate are fitted and frame adhesive are solidified.
On the contraposition make-up machine, will go up lower glass substrate and carry out the contraposition applying, and use thermal curing methods about 200 ℃, frame adhesive to be solidified, form the liquid crystal sylphon.
Sylphon is placed in the liquid crystal filling confined chamber that vacuumizes, and the gas in the box is extracted out by sealing part, makes filling orifice (breach of sealed frame) contact liquid crystal then, liquid crystal material (MLC-6224-000 that Merck company produces) parameter: ε
//=14, ε
⊥=4, n
o=1.4794, n
e=1.6, K
11=10.87pN, K
22=9.5pN, K
33=15.37pN, γ
1=0.1Pas.Utilize capillarity, just most of volume of sylphon can be injected liquid crystal material, to the indoor inert gases such as fully dry argon gas of process and nitrogen that charge into of liquid crystal filling, utilize the pressure of inert gas to make liquid crystal material be full of liquid crystal cell fully again.Adopt that fluid sealant is bonding to seal, by freezing method, allow sealing compound shrink rightly to bring into seal in, solidify with UV-irradiation again.
Step 7 is cleaned glass surface and is sticked the negative C film of two equal thickness and polaroid (being the polarizer and analyzer) up and down on the liquid crystal cell upper and lower base plate.
Some sealing compounds, liquid crystal and other dirt removals of liquid crystal cell remained on surface fallen in frictioning and cleaning.Just can stick two equal thickness negative C films and polaroid up and down then.The refractive index parameter of negative C film is: n
e=1.483, n
oThe thickness of=1.493, two negative C films all is 21 μ m.In the simulation, polaroid adopts desirable polaroid, and the position angle of the polarizer is-45 °, and the position angle of analyzer is 45 °, and thickness is 220 μ m.
Obtain the IPS-VA LCD sample box of this quick response and high permeability at last.
It is known technology that above method for making is not stated content, specifically can be with reference to " the liquid crystal device technology basis " by publishing house of Beijing University of Post ﹠ Telecommunication publishes, model will is newly write.
The electrode structure of the IPS-VA LCD (b) of quick response that the present invention makes and high permeability and bright attitude liquid crystal molecule distribute and the electrode structure of Traditional IP S-VA LCD (a) and bright attitude liquid crystal molecule distribute contrasts as shown in Figure 1, with the pairing top glass substrate of lower glass substrate strip ITO pixel electrode 1 and center, 2 gap on add strip ITO public electrode 3.The IPS-VA LCD (solid line) of response and high permeability contrasted as shown in Figure 2 with Traditional IP S-VA LCD (dotted line) response time fast, identical liquid crystal material parameter and liquid crystal cell are thick, the rise time 8.03ms of Traditional IP S-VA LCD, fall time 6.32ms, the rise time 3.87ms of the IPS-VA LCD of quick response and high permeability, fall time, 6.28ms realized opening the raising of response speed more than 1 times.Fig. 3 is the IPS-VA LCD (dotted line) of response fast and high permeability and traditional IPS-VA LCD (solid line) transmitance and voltage relationship figure contrast, the IPS-VA LCD of quick response and high permeability has lower threshold voltage under transmitance situation much at one, is beneficial to driving.Fig. 4 is the IPS-VA LCD (b) of response fast and high permeability and traditional IPS-VA LCD (a) transmission region and light tight area planar figure contrast, the transmission region of two kinds of displays and light tight zone cause two kinds of displays that identical aperture opening ratio is arranged much at one.Fig. 5 is that the IPS-VA LCD (b) of fast response and high permeability and the contrast visual angle figure after the traditional identical compensation of IPS-VA LCD (a) contrast, and after compensating by identical film, the visual angle of two kinds of displays is identical.
The thickness of liquid crystal layer is 4 μ m, liquid crystal material (MLC-6224-000 that Merck company produces) parameter: ε
//=14, ε
⊥=4, n
o=1.4794, n
e=1.6, K
11=10.87pN, K
22=9.5pN, K
33=15.37pN, γ
1=0.1Pas.The border strong anchoring, the pre-dumping angle of two substrates place liquid crystal and position angle all are 90 ° and 0 ° up and down.The refractive index parameter of two negative C films is: n
e=1.483, n
o=1.493, thickness all is 21 μ m.In the simulation, polaroid (being the polarizer and analyzer) all adopts desirable polaroid up and down.The position angle of the polarizer is-45 °, and the position angle of analyzer is 45 °.
The original state of the IPS-VA LCD of quick response and high permeability, the liquid crystal molecule vertical plane is arranged, and under the effect of orthogonal polarizers and compensate film, obtains a good dark attitude.On the adjacent strip ITO electrode (pixel 1 and pixel 2) of lower glass substrate, add ± operating voltage of 5.4V, simultaneously, strip ITO electrode on the top glass substrate is making alive not, keep the 0V electronegative potential, the interelectrode oblique electric field of strip ITO in the utilization on the lower glass substrate makes liquid crystal molecule quick slant in opening response process, finally under the coplane effect of electric field, the molecule tilt state that reaches capacity is finally realized bright attitude.
The present invention does not address part and is applicable to prior art.
Claims (10)
1. quick IPS-VA LCD of response and high permeability is characterized by this LCD and comprises: two polaroids (being divided into the polarizer and analyzer), two negative C films, liquid crystal cell; Its position relation is followed successively by: the polarizer, the first negative C film, liquid crystal cell, second negative C film and the analyzer; Light is successively by the polarizer, the first negative C film, liquid crystal cell, second negative C film and the analyzer.
2. as the quick IPS-VA LCD of response and high permeability of claim 1, it is characterized by described liquid crystal cell is the liquid crystal cell that vertical plane is arranged, and comprising: glass substrate, indium-tin oxide electrode (strip ITO electrode), oriented layer, liquid crystal layer, envelope frame adhesive and sept; Close its position: outermost layer is two sheet glass substrates, and the lower-glass inside surface is a strip ITO pixel electrode, and the upper glass inside surface is a strip ITO public electrode, is oriented layer more inwards, and the centre is liquid crystal layer and sept.
3. as the quick IPS-VA LCD of response and high permeability of claim 1, two strip ITO electrodes that it is characterized by in the described liquid crystal cell are identical, be: electrode width is W=1～4 μ m, electrode separation is G=4～20 μ m, strip ITO public electrode on the top glass substrate is positioned at top, center, lower glass substrate strip ITO pixel electrode gap, and adds the opposite voltage of electromotive force between lower glass substrate strip ITO electrode adjacent electrode (pixel 1 and pixel 2).
4. as the IPS-VA LCD of quick response of claim 1 and high permeability, it is characterized by the width of going up the strip ITO electrode on the lower glass substrate inside surface in the described liquid crystal cell is W=1 μ m, and electrode separation is G=9 μ m.
5. as the IPS-VA LCD of quick response of claim 1 and high permeability, the thickness that it is characterized by liquid crystal layer in the described liquid crystal cell is 4 μ m, and the liquid crystal material parameter is: ε
//=14, ε
⊥=4, n
o=1.4794, n
e=1.6, K
11=10.87pN, K
22=9.5pN, K
33=15.37pN, γ
1=0.1Pas; The border strong anchoring, the pre-dumping angle of two substrates place liquid crystal and orientation angles all are 90 ° and 0 ° up and down.
6. as the IPS-VA LCD of quick response of claim 1 and high permeability, the sept that it is characterized by in the described liquid crystal cell is a spherical resin powder sept, and diameter is 4 μ m.
7. as the IPS-VA LCD of quick response of claim 1 and high permeability, the oriented layer that it is characterized by in the described liquid crystal cell is a polyimide film.
8. as the IPS-VA LCD of quick response of claim 1 and high permeability, the thickness that it is characterized by described two negative C films is 21 μ m; The refractive index parameter is: n
e=1.483, n
o=1.493.
9. as the IPS-VA LCD of quick response of claim 1 and high permeability, it is characterized by the described polarizer and analyzer and be desirable polaroid.
10. as the quick method for making of the IPS-VA LCD of response and high permeability of claim 1, it is as follows to it is characterized by step:
Step 1 etches strip ITO electrode pattern;
Step 2, oriented layer coating and curing;
Step 3, the oriented layer friction treatment;
Step 4, lower glass substrate spray spherical resin powder, top glass substrate printing envelope frame adhesive;
Step 5, last lower glass substrate are fitted and with the adhesive curing of edge sealing frame;
Step 6, the perfusion liquid crystal material also seals;
Step 7 is cleaned the glass surface and two the negative C films of fitting, and the polarizer and analyzer, obtains the IPS-VA LCD sample box of this quick response and high permeability at last.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103529606A (en) * | 2013-10-29 | 2014-01-22 | 京东方科技集团股份有限公司 | Liquid crystal display panel and display device |
| CN103529607A (en) * | 2013-10-29 | 2014-01-22 | 京东方科技集团股份有限公司 | Liquid crystal display panel, display device and driving method of display device |
| WO2014040329A1 (en) * | 2012-09-14 | 2014-03-20 | 深圳市华星光电技术有限公司 | Dual-tft substrate blue phase liquid crystal display panel |
| CN104216179A (en) * | 2014-09-12 | 2014-12-17 | 东莞通华液晶有限公司 | Ultra-wide-visual-angle and ultrahigh-contrast-ratio liquid crystal display control method and ultra-wide-visual-angle and ultrahigh-contrast-ratio liquid crystal display structure |
| US9128340B2 (en) | 2012-09-14 | 2015-09-08 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Dual-TFT-substrate blue-phase liquid crystal display panel |
| CN105204243A (en) * | 2015-10-16 | 2015-12-30 | 武汉华星光电技术有限公司 | High-speed response liquid crystal display panel |
| CN106782242A (en) * | 2016-12-29 | 2017-05-31 | 深圳市宇顺电子股份有限公司 | A kind of IPS display screens detection means and detection method |
| CN107908027A (en) * | 2017-12-06 | 2018-04-13 | 昆山龙腾光电有限公司 | Liquid crystal display device |
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| WO2014040329A1 (en) * | 2012-09-14 | 2014-03-20 | 深圳市华星光电技术有限公司 | Dual-tft substrate blue phase liquid crystal display panel |
| US9128340B2 (en) | 2012-09-14 | 2015-09-08 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Dual-TFT-substrate blue-phase liquid crystal display panel |
| CN103529607B (en) * | 2013-10-29 | 2017-05-31 | 京东方科技集团股份有限公司 | A kind of liquid crystal display panel, display device and its driving method |
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| CN103529606A (en) * | 2013-10-29 | 2014-01-22 | 京东方科技集团股份有限公司 | Liquid crystal display panel and display device |
| WO2015062310A1 (en) * | 2013-10-29 | 2015-05-07 | 京东方科技集团股份有限公司 | Liquid crystal display panel, display device and drive method therefor |
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| CN104216179A (en) * | 2014-09-12 | 2014-12-17 | 东莞通华液晶有限公司 | Ultra-wide-visual-angle and ultrahigh-contrast-ratio liquid crystal display control method and ultra-wide-visual-angle and ultrahigh-contrast-ratio liquid crystal display structure |
| CN105204243A (en) * | 2015-10-16 | 2015-12-30 | 武汉华星光电技术有限公司 | High-speed response liquid crystal display panel |
| CN106782242A (en) * | 2016-12-29 | 2017-05-31 | 深圳市宇顺电子股份有限公司 | A kind of IPS display screens detection means and detection method |
| CN107908027A (en) * | 2017-12-06 | 2018-04-13 | 昆山龙腾光电有限公司 | Liquid crystal display device |
| CN107908027B (en) * | 2017-12-06 | 2022-02-15 | 昆山龙腾光电股份有限公司 | Liquid crystal display device having a plurality of pixel electrodes |
| CN111258130A (en) * | 2020-03-16 | 2020-06-09 | 深圳市华星光电半导体显示技术有限公司 | Liquid crystal display panel |
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Application publication date: 20101215 |