CN201853036U - IPS-VA (in-plane switching vertical alignment) liquid crystal display with low threshold voltage and fast response - Google Patents
IPS-VA (in-plane switching vertical alignment) liquid crystal display with low threshold voltage and fast response Download PDFInfo
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- CN201853036U CN201853036U CN2010206255228U CN201020625522U CN201853036U CN 201853036 U CN201853036 U CN 201853036U CN 2010206255228 U CN2010206255228 U CN 2010206255228U CN 201020625522 U CN201020625522 U CN 201020625522U CN 201853036 U CN201853036 U CN 201853036U
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- liquid crystal
- threshold voltage
- lcd
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Abstract
The utility model relates to an IPS-VA (in-plane switching vertical alignment) liquid crystal display with a low threshold voltage and a fast response, which comprises two polarizing films, two constant-thickness negative C films and a liquid crystal cell, wherein the liquid crystal cell is a vertically aligned liquid crystal cell and comprises a glass substrate, ITO (indium tin oxide) electrodes, an alignment layer, a liquid crystal material, a frame sealing adhesive and spherical resin powder, and the strip-shaped ITO electrodes are arranged into unequal width; the width of the electrode on an upper substrate is 2-4 times larger than that of the electrode on a lower substrate, and the width of the electrode on the upper substrate is half less than that of the electrode on the lower substrate; and voltages with opposite electric potentials are additionally arranged between the adjacent electrodes on the lower substrate. By increasing the width of the electrode on the upper substrate, the electric filed with a larger inclined angle is obtained to improve the response speed, simultaneously reduce the threshold voltage and further achieve the purpose that the response time is reduced by 1ms.
Description
Technical field
The utility model relates to the liquid crystal display pattern of a kind of low threshold voltage and quick response, is specially the IPS-VA LCD of a kind of low threshold voltage and quick response.
Background technology
Coplane conversion vertical plane is arranged LCD (In-Plane Switching Vertical Alignment LCD), being called for short (IPS-VALCD), is the LCD that the horizontal component of electric field that utilizes the interelectrode electric potential difference of strip ITO on the lower glass substrate to be produced drives lqiuid crystal molecule tipping.
It all is the strip ITO 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.In number of patent application is 201010229955.6 patent, (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 lower glass substrate strip ITO electrode gap center on add strip ITO electrode with the lower glass substrate same widths, the interelectrode oblique electric field of lower glass substrate strip ITO reaches and improves the purpose of opening response speed and reducing threshold voltage in the utilization, driving voltage big (～2.7V), the response time long (greater than 10ms).
The utility model content
The purpose of this utility model is to solve conventional co-planar conversion vertical plane and arranges the big and slow problem of response speed of LCD threshold voltage, and the LCD of a kind of low threshold voltage and quick response is provided.The utility model belongs to a kind of coplane conversion vertical plane with quick response and low threshold voltage characteristic and arranges LCD, (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 lower glass substrate strip ITO electrode gap center on add that the strip ITO electrode of broad is (in number of patent application is 201010229955.6 patent, strip shaped electric poles width on the upper and lower base plate is identical), in the utilization between lower glass substrate strip ITO electrode the oblique electric field at bigger pitch angle reached and improved the purpose of opening response speed and reducing threshold voltage, be on the beneficial effect basis of 201010229955.6 patent at number of patent application, further realized the reduction of response time 1ms, threshold voltage has reduced 0.8V simultaneously, the electric light curve is also mild simultaneously, and this helps the control that the LCD gray scale shows.
Technical solution of the present utility model is as follows:
A kind of low threshold voltage and the IPS-VA LCD that responds fast, this LCD comprises: two polaroids (being divided into the polarizer and analyzer), two equal thickness are born C film, 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, tin indium oxide (ITO) electrode, oriented layer, liquid crystal material, envelope frame adhesive and spherical resin powder; Close its position: outermost layer is two sheet glass substrates, and the glass substrate inside surface is a strip ITO electrode, is oriented layer more inwards, and the centre is liquid crystal material and sept;
It is characterized by strip ITO electrode and be set to unequal width, electrode width on the upper substrate is 2-4 a times of infrabasal plate top electrode width, and the electrode width on the upper substrate is not more than infrabasal plate top electrode spacing half, adds the opposite voltage of electromotive force on the infrabasal plate between adjacent electrode.
Strip ITO electrode width on the described lower glass substrate is W
1=1 μ m, electrode separation is G=9 μ m, the strip ITO electrode width on the top glass substrate is W
2=2～4 μ m are positioned at top, lower glass substrate strip ITO electrode gap center.
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=1.62, 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 24.5 μ m; The refractive index parameter is: n
e=1.483, n
o=1.493.
The described polarizer and analyzer are desirable polaroid.
The beneficial effects of the utility model are: at other structures and application number is on the 2010229955.6 identical bases, change its electrode structure, by increasing upper substrate top electrode width, the electric field at the bigger pitch angle of acquisition has been realized improving and has been opened response speed, reached the purpose that reduces threshold voltage simultaneously, transmitance is lower slightly than Traditional IP S-VA LCD, and threshold voltage has reduced 0.8V, with the contrast of Traditional IP S-VA LCD (dotted line) response time, identical liquid crystal material parameter (is removed n
eOutward) and liquid crystal cell thick, the rise time 8.03ms of Traditional IP S-VA LCD, fall time 6.32ms, the rise time 2.97ms of the IPS-VA LCD of low threshold voltage and quick response, fall time, 5.94ms realized opening the raising of response speed more than 1.5 times, was beneficial effect (the rise time 3.87ms of 201010229955.6 patent at number of patent application, fall time 6.28ms) on the basis, further realized the reduction of response time 1ms.And by using two thickness to be 24.5 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 low threshold voltage and response fast is in the good characteristic that has kept Traditional IP S-VA LCD, further reduced threshold voltage, response speed is greatly improved simultaneously, this is significant 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 IPS-VA LCD (b) of the utility model low threshold voltage and response fast and traditional IPS-VA LCD (a) electrode structure and contrast of bright attitude liquid crystal molecule distribution schematic diagram.
Fig. 2 is that the utility model low threshold voltage liquid crystal parameter identical with traditional IPS-VA LCD (dotted line) with the IPS-VA LCD (solid line) of response fast (removes n
eOutward) and liquid crystal cell thick, response time figure contrast.
Fig. 3 is the IPS-VA LCD (dotted line) of the utility model low threshold voltage and response fast and traditional IPS-VA LCD (solid line) transmitance and voltage relationship figure contrast.
Fig. 4 is the IPS-VA LCD (b) of the utility model low threshold voltage and response fast and traditional IPS-VA LCD (a) transmission region and light tight area planar figure contrast.
Fig. 5 is that the IPS-VA LCD (b) of the utility model low threshold voltage and fast response and the contrast visual angle figure after traditional IPS-VA LCD (a) compensation contrast.
Embodiment
The method for making of the IPS-VA LCD sample box of low threshold voltage of the present utility model and quick response, 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 obtain on the ITO electro-conductive glass and the complete corresponding electrode pattern of mask, both the strip ITO electrode width on the lower glass substrate was W
1=1 μ m, electrode separation is G=9 μ m, the strip ITO electrode width on the top glass substrate is W
2=4 μ m, electrode separation is G
2=6 μ m.
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.
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.
On the contraposition make-up machine, will go up lower glass substrate and carry out the contraposition applying, make the strip ITO electrode on the top glass substrate be positioned at top, lower glass substrate strip ITO electrode gap center, 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=1.62, 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 6 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 24.5 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.
The IPS-VA LCD sample box that obtains this low threshold voltage at last and respond fast.
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 low threshold voltage that the utility model makes and fast the IPS-VA LCD (b) of response electrode structure and bright attitude liquid crystal molecule distributes 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 electrode 1 and center, 2 gap on add the strip ITO electrode 3 of broad.The IPS-VA LCD (solid line) of low threshold voltage and response fast contrasted as shown in Figure 2 with Traditional IP S-VA LCD (dotted line) response time, and identical liquid crystal material parameter (is removed n
eOutward) and liquid crystal cell thick, the rise time 8.03ms of Traditional IP S-VA LCD, fall time 6.32ms, the rise time 2.97ms of the IPS-VA LCD of low threshold voltage and quick response, fall time 5.94ms, having realized opening the raising of response speed more than 1.5 times, is on the beneficial effect basis of 201010229955.6 patent at number of patent application, has further realized the reduction of response time 1ms.Fig. 3 is the IPS-VA LCD (dotted line) of low threshold voltage and response fast and traditional IPS-VA LCD (solid line) transmitance and voltage relationship figure contrast, transmitance has reduction slightly, low threshold voltage is compared with traditional IPS-VA LCD with the threshold voltage of the IPS-VA LCD that responds fast and has been reduced 0.8V, is beneficial to driving.Fig. 4 is the IPS-VA LCD (b) of low threshold voltage and response fast 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 low threshold voltage and fast response and the contrast visual angle figure after traditional IPS-VA LCD (a) compensation contrast, and 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=1.62, 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 24.5 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 low threshold voltage and quick response, 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 (1 and 2) of lower glass substrate, add ± operating voltage of 7.8V, simultaneously, the strip ITO electrode of broad making alive not on the top glass substrate, 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.
Strip ITO electrode widths W on the top glass substrate
2=2 μ m, electrode separation G
2=8 μ m, other conditions record out response time 3.04ms with embodiment 1, are on the beneficial effect basis of 201010229955.6 patent at number of patent application, and opening the response time also has the reduction of nearly 1ms.
The utility model is not addressed part and is applicable to prior art.
Claims (7)
1. the low threshold voltage and the IPS-VA LCD of response fast, this LCD comprises: two polaroids that are divided into the polarizer and analyzer, two negative C films of equal thickness, 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, ITO electrode, oriented layer, liquid crystal material, envelope frame adhesive and spherical resin powder; Close its position: outermost layer is two sheet glass substrates, and the glass substrate inside surface is a strip ITO electrode, is oriented layer more inwards, and the centre is liquid crystal material and sept;
It is characterized by strip ITO electrode and be set to unequal width, electrode width on the upper substrate is 2-4 a times of infrabasal plate top electrode width, and the electrode width on the upper substrate is not more than infrabasal plate top electrode spacing half, adds the opposite voltage of electromotive force on the infrabasal plate between adjacent electrode.
2. low threshold voltage as claimed in claim 1 and the IPS-VA LCD that responds fast, the strip ITO electrode width that it is characterized by on the described lower glass substrate is W
1=1 μ m, electrode separation is G=9 μ m, the strip ITO electrode width on the top glass substrate is W
2=2～4 μ m are positioned at top, lower glass substrate strip ITO electrode gap center.
3. low threshold voltage as claimed in claim 1 and the IPS-VA LCD that responds fast, the thickness that it is characterized by liquid crystal layer in the described liquid crystal cell is 4 μ m, the liquid crystal material parameter is: ε
//=14, ε
⊥=4, n
o=1.4794, n
e=1.62, 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.
4. low threshold voltage as claimed in claim 1 and the IPS-VA LCD that responds fast, the sept that it is characterized by in the described liquid crystal cell is a spherical resin powder sept, diameter is 4 μ m.
5. low threshold voltage as claimed in claim 1 and the IPS-VA LCD that responds fast, the oriented layer that it is characterized by in the described liquid crystal cell is a polyimide film.
6. low threshold voltage as claimed in claim 1 and the IPS-VA LCD that responds fast, the thickness that it is characterized by described two negative C films is 24.5 μ m; The refractive index parameter is: n
e=1.483, n
o=1.493.
7. low threshold voltage as claimed in claim 1 and the IPS-VA LCD that responds fast is characterized by the described polarizer and analyzer and are desirable polaroid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206255228U CN201853036U (en) | 2010-11-25 | 2010-11-25 | IPS-VA (in-plane switching vertical alignment) liquid crystal display with low threshold voltage and fast response |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206255228U CN201853036U (en) | 2010-11-25 | 2010-11-25 | IPS-VA (in-plane switching vertical alignment) liquid crystal display with low threshold voltage and fast response |
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| Publication Number | Publication Date |
|---|---|
| CN201853036U true CN201853036U (en) | 2011-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206255228U Expired - Lifetime CN201853036U (en) | 2010-11-25 | 2010-11-25 | IPS-VA (in-plane switching vertical alignment) liquid crystal display with low threshold voltage and fast response |
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| CN (1) | CN201853036U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976006A (en) * | 2010-11-25 | 2011-02-16 | 河北工业大学 | Low-threshold-voltage and fast-response IPS-VA (In-Plane Switching-Vertical Alignment) liquid crystal display |
| CN106773269A (en) * | 2017-02-28 | 2017-05-31 | 精电(河源)显示技术有限公司 | Rapid answer and high-contrast LCDs |
-
2010
- 2010-11-25 CN CN2010206255228U patent/CN201853036U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976006A (en) * | 2010-11-25 | 2011-02-16 | 河北工业大学 | Low-threshold-voltage and fast-response IPS-VA (In-Plane Switching-Vertical Alignment) liquid crystal display |
| CN101976006B (en) * | 2010-11-25 | 2012-03-21 | 河北工业大学 | Low-threshold-voltage and fast-response IPS-VA (In-Plane Switching-Vertical Alignment) liquid crystal display |
| CN106773269A (en) * | 2017-02-28 | 2017-05-31 | 精电(河源)显示技术有限公司 | Rapid answer and high-contrast LCDs |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110601 Effective date of abandoning: 20120321 |