CN102879956B - Blue phase liquid crystal display panel - Google Patents
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- CN102879956B CN102879956B CN201210337287.8A CN201210337287A CN102879956B CN 102879956 B CN102879956 B CN 102879956B CN 201210337287 A CN201210337287 A CN 201210337287A CN 102879956 B CN102879956 B CN 102879956B
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Abstract
A blue phase liquid crystal display panel comprises a first substrate, a plurality of first pixels, a second substrate, a plurality of second pixels and a blue phase liquid crystal layer. The first substrate and the second substrate are oppositely arranged. The first pixels and the second pixels are respectively arrayed on the first substrate and the second substrate. Each first pixel comprises a first electrode and a second electrode, and the first electrode and the second electrode are respectively provided with a plurality of strip patterns which are connected with each other. Each second pixel comprises a third electrode and a fourth electrode, the third electrode and the fourth electrode are respectively provided with a plurality of strip patterns which are connected with each other, and the strip patterns of the first electrode are crossed with the strip patterns of the third electrode. The blue phase liquid crystal layer is configured between the first pixel and the second pixel. The blue phase liquid crystal display panel has lower driving voltage and higher penetration rate.
Description
Technical field
The invention relates to a kind of display panels, and relate to a kind of blue-phase liquid crystal display panel especially.
Background technology
1888 Christian eras, cholesterol type benzoate (Cholesteric benzoate) is placed in polarizing microscope by Friedrich Reinitzer, observe cholesterol type benzoate and can present different colours (bluish violet and blueness) in even phase (Isotropic) and cholesterol phase (Cholesteric), the color variation phenomenon between even phase and cholesterol phase exists only in very little temperature range (about only having 1 DEG C of temperature range).In 1970 Christian eras, many scientists utilize the method such as analysis by measure, high resolving power differential scanning calorie meter, confirm that aforementioned phenomenon is a kind of new thermodynamically stable phase, and are called blue phase.
Indigo plant has three kinds of out of phase existence mutually, and these three kinds are expressed as BP I, BP II, BP III mutually, and BPIII exist temperature be three mutually in the highest, the BP III mentioned in the literature is " mist phase " (fog phase).Compared to the cube structure (cubic) of BP I and BP II, BP III is unformed (amorphous).At polarized light microscopy Microscopic observation, BP III, normally without the fuzzy image of any structure, is therefore difficult to polarized light microscopy Microscopic observation.
The structure of BP I, BP II is proved, and the elementary cell of formation BP I, BP II is " two torsion is cylindric " (DTC:double twist cylinder), and such arrangement mode has minimum free energy.In addition, two torsion cylindrical tube is orthogonal in the arrangement in space, such arrangement causes the lattice of defect (defect), and is considered to the pre-converted phenomenon (pre-transitional phenomena) being entered cholesterol phase by liquid crystal phase.Therefore, indigo plant is classified as invalid phase (frustrated phases) mutually.The experimental research such as Bragg diffraction, Ke Saier diffraction chart (Kossel diagram), optical texture, crystal growth is utilized to find, BP II is simple cubic structure (SC:simple cubic) (Mol.Cryst.Liq.Cryst., Vol.465, pp.283 – 288,2007), BP I is body-centered cubic structure (BCC:body-centered cubic).Be different from other liquid crystal phase, as nematic phase (nematic), smectic phase (smectic), even phase (isotropic), usual BP I, BP II can show the color graphics (J.A.C.S of many tabulars (platelet texture) under polarizing microscope, 2008,130,6326 Kikuchi et.al.), this is because lattice period causes caused by Bragg reflection at visible wavelength range.
General liquid crystal has optics Contraphasic (optically anisotropic), but blue phase is but have the tropisms such as optics (optically isotropic).In other words, indigo plant has very low mutually or does not even have birefringence (Birefringence).
Lattice period due to blue phase is the function of visible wavelength, therefore can produce selectivity " Bragg reflection " (selective Bragg reflection).This characteristic makes blue phase liquid crystal have to be applied in the light valve (fast light modulators) of rapid answer.But, no matter prediction in theory or observation experimentally, blue phase liquid crystal only appears at and has high-purity, height revolves in the molecular material of optical activity, and therefore blue phase liquid crystal exists only in very little temperature range (being less than the temperature range of 2 DEG C).Therefore, blue phase liquid crystal is only academicly coming into question usually, but does not come into one's own in practical application.
Nearly ten years, in order to the display quality making the display quality of display panels outmatch cathode-ray tube (CRT), there is the blue attention being subject to again science and industrial community mutually of rapid answer characteristic.In order to the needs applied, blue phase liquid crystal must have broad temperature application range, and therefore different technical developments is suggested in succession.Such as, utilize the characteristic of stabilizing polymer (producing macromolecule reticulate texture) to produce the blue phase (Nature materials, 2002,1,64) that can be present in broad temperature interval.In addition, in 2002, a small amount of molecule monomer and photoresist added in blue phase liquid crystal by the people such as Kikuchi, and in blue phase temperature range, irradiation produces the stable blue phase as gel structure, successfully produces the blue phase that temperature range is about 60 DEG C.
Fig. 1 is the partial schematic diagram of existing blue-phase liquid crystal display panel.Please refer to Fig. 1, existing blue-phase liquid crystal display panel 50 arranges the pixel cell 54 of plane conversion type (In-Plane Switching, IPS) at infrabasal plate 52.Each pixel cell 54 has the pixel electrode 54a and common electrode 54b that are electrically insulated mutually, and wherein pixel electrode 54a has multiple strip pattern SP1 connected each other, and common electrode 54b also has multiple strip pattern SP2 connected each other.Strip pattern SP1 and strip pattern SP2 system are alternately arranged and parallel to each other haply.Therefore, electric field E can be produced between the strip pattern SP1 of pixel electrode 54a and the strip pattern SP2 of adjacent common electrode 54b, to change the arrangement (orientation) of liquid crystal molecule in pixel cell 54.
Fig. 2 is the schematic diagram of the pixel cell of Fig. 1 when being unlocked.Please refer to Fig. 2, when pixel electrode 54a and common electrode 54b is applied in suitable voltage respectively and makes to produce electric field E between the strip pattern SP1 of pixel electrode 54a and the strip pattern SP2 of common electrode 54b, region between strip pattern SP1 and strip pattern SP2 is clear zone B, and strip pattern SP1 and the region occupied by strip pattern SP2 are then dark space D.For example, when the width of strip pattern SP1, SP2 is 3 microns, and when the spacing between strip pattern SP1 and adjacent strip pattern SP2 is 3 microns, in blue-phase liquid crystal display panel 50, the area ratio of clear zone B and dark space D is about 1:1.
Although blue phase liquid crystal has the advantages such as tropism such as rapid answer time and optics, have the shortcoming that driving voltage is higher, its driving voltage usually need up to 55 volts.In addition, have the blue-phase liquid crystal display panel of the pixel cell of plane conversion type, the region occupied by its strip pattern is dark space D, makes the penetrance of blue-phase liquid crystal display panel not good.
Hold above-mentioned, the high driving voltage of blue-phase liquid crystal display panel and low penetration rate are one of the problems needing solution badly.
Summary of the invention
The invention provides a kind of blue-phase liquid crystal display panel, there is lower driving voltage and higher penetrance.
The present invention proposes a kind of blue-phase liquid crystal display panel, comprises a first substrate, multiple first pixel, a second substrate, multiple second pixel and a blue phase liquid crystal layer.First pel array is arranged on first substrate.Each first pixel comprises one first electrode and one second electrode that are electrically insulated each other, wherein the first electrode has multiple the first strip pattern be connected to each other, second electrode has multiple the second strip pattern be connected to each other, first strip pattern and the second strip pattern are alternately arranged, and the first strip pattern is substantially parallel to the second strip pattern.Second substrate and first substrate are oppositely disposed.Second pel array is arranged on second substrate.Each second pixel comprises one the 3rd electrode and one the 4th electrode that are electrically insulated each other, wherein the 3rd electrode has multiple Article 3 shape pattern be connected to each other, 4th electrode has multiple Article 4 shape pattern be connected to each other, Article 3 shape pattern and Article 4 shape pattern are alternately arranged, and Article 3 shape pattern is substantially parallel to Article 4 shape pattern, and the first strip pattern intersects with Article 3 shape pattern.Blue phase liquid crystal layer is configured between the first pixel and the second pixel.
In one embodiment of this invention, above-mentioned each first pixel more comprises one and first the first on-off element that be electrically connected of electrode, and each second pixel more comprises the second switch element that the one and the 3rd electrode is electrically connected, wherein each second electrode and each 4th electrode are electrically coupled to a common electric voltage.
In one embodiment of this invention, the first above-mentioned strip pattern intersects with Article 4 shape pattern, and the second strip pattern and Article 3 shape pattern intersect, and the second strip pattern intersects with Article 4 shape pattern.
In one embodiment of this invention, one first transverse electric field is produced between above-mentioned each first strip pattern and the second adjacent strip pattern, and produce one second transverse electric field between each Article 3 shape pattern and adjacent Article 4 shape pattern, and the first transverse electric field is different from the second transverse electric field.
In one embodiment of this invention, the infall of the first above-mentioned strip pattern and Article 3 shape pattern, the infall of the first strip pattern and Article 4 shape pattern, the infall of the infall of the second strip pattern and Article 3 shape pattern and the second strip pattern and Article 4 shape pattern is defined as multiple dark space separated from one another (dark regions), and at the first strip pattern, second strip pattern, in the region that Article 3 shape pattern and Article 4 shape pattern distribute, subregion beyond dark space is defined as multiple clear zone separated from one another (bright regions), and be not distributed with the first strip pattern, second strip pattern, the region of Article 3 shape pattern and Article 4 shape pattern is defined as semi-transparent district (translucent regions).
In one embodiment of this invention, the first above-mentioned strip pattern is substantially perpendicular to Article 3 shape pattern.
In one embodiment of this invention, the first above-mentioned strip pattern is substantially perpendicular to Article 4 shape pattern, and the second strip pattern is substantially perpendicular to Article 3 shape pattern, and the second strip pattern is substantially perpendicular to Article 4 shape pattern.
In one embodiment of this invention, one first transverse electric field is produced between above-mentioned each first strip pattern and the second adjacent strip pattern, and produce one second transverse electric field between each Article 3 shape pattern and adjacent Article 4 shape pattern, and the first transverse electric field is substantially perpendicular to the second transverse electric field.
Based on above-mentioned, the present invention proposes a kind of blue-phase liquid crystal display panel, and it arranges the first pixel and the second pixel respectively on the substrate of two relative configurations.First pixel and the second pixel have multiple pattern respectively and are alternately arranged and electrode parallel to each other, and wherein the first pixel is intersected with the electrode pattern of the second pixel, and blue phase liquid crystal layer is configured between the first pixel and the second pixel.Accordingly, blue-phase liquid crystal display panel has lower driving voltage and higher penetrance.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Accompanying drawing explanation
Fig. 1 is the partial schematic diagram of existing blue-phase liquid crystal display panel.
Fig. 2 is the schematic diagram of the pixel cell of Fig. 1 when being unlocked.
Fig. 3 is the diagrammatic cross-section of the blue-phase liquid crystal display panel of one embodiment of the invention.
Fig. 4 is the partial schematic diagram of blue-phase liquid crystal display panel in the first pixel and the second pixel place of Fig. 3.
Fig. 5 is the schematic diagram of the blue-phase liquid crystal display panel of Fig. 3 when being unlocked.
Fig. 6 is the driving voltage-penetrance curve (V-T curves) of the blue-phase liquid crystal display panel of Fig. 3 and the existing blue-phase liquid crystal display panel of Fig. 1.
Wherein, Reference numeral:
50,100: blue-phase liquid crystal display panel
52: infrabasal plate
54: pixel cell
54a: pixel electrode
54b: common electrode
110: first substrate
120: the first pixels
122: the first electrodes
124: the second electrodes
126: the first on-off elements
130: second substrate
140: the second pixels
142: the three electrodes
144: the four electrodes
146: second switch element
150: blue phase liquid crystal layer
B, BR, BR1, BR2: dark space
D, DR, DR1, DR2: clear zone
TR, TR1, TR2: semi-transparent district
D1: first direction
D2: second direction
E: electric field
E1: the first transverse electric field
E2: the second transverse electric field
SP1, SP2: strip pattern
P1: the first strip pattern
P2: the second strip pattern
P3: Article 3 shape pattern
P4: Article 4 shape pattern
L1, L2: width
S1, S2: spacing
V: common electric voltage
Embodiment
Fig. 3 is the diagrammatic cross-section of the blue-phase liquid crystal display panel of one embodiment of the invention.Fig. 4 is the partial schematic diagram of blue-phase liquid crystal display panel in the first pixel and the second pixel place of Fig. 3.Please refer to Fig. 3 and Fig. 4, in the present embodiment, blue-phase liquid crystal display panel 100 comprises first substrate 110, multiple first pixel 120, second substrate 130, multiple second pixel 140 and blue phase liquid crystal layer 150.First substrate 110 and second substrate 130 are oppositely disposed.First pixel 120 arrayed is on first substrate 110, and the second pixel 140 arrayed is on second substrate 130.Blue phase liquid crystal layer 150 is configured between the first pixel 120 and the second pixel 140.In other words, blue phase liquid crystal layer 150 is between the first substrate 110 and second substrate 130 of relative configuration, and the first pixel 120 and the second pixel 140 difference position are in the inner side of first substrate 110 with second substrate 130.
Specifically, in the present embodiment, each first pixel 120 comprises the first electrode 122 and the second electrode 124 be electrically insulated each other.First electrode 122 has multiple the first strip pattern P 1 be connected to each other, and the second electrode 124 also has multiple the second strip pattern P 2 be connected to each other.First strip pattern P 1 is arranged in parallel and be connected to each other, and the second strip pattern P 2 is arranged in parallel and be connected to each other.First strip pattern P 1 and the second strip pattern P 2 are be alternately arranged, and the first strip pattern P 1 is substantially parallel to the second strip pattern P 2.Therefore, the first electrode 122 and the second electrode 124 can be considered it is different finger electrode patterns, and the staggering mutually of these finger electrode patterns, as shown in Figure 4.
Please refer to Fig. 3, in the present embodiment, each first pixel 120 more comprises at least one first on-off element 126.In the present embodiment, the first on-off element 126 is such as bottom-gate-type transistor (Transistor, TFT), but the present invention is not as restriction, and top gate-type transistors also can use.First electrode 122 is electrically connected the first on-off element 126, and each signal line that the first on-off element 126 connects correspondence is such as sweep trace and data line, whether writes the first electrode 122 with the information of voltage controlling each signal line further.On the other hand, the second electrode 124 is electrically coupled to common electric voltage V.Therefore, when the first electrode 122 and the second electrode 124 are applied in suitable voltage respectively, the first pixel 120 is unlocked and makes to produce the first transverse electric field E1 between the first strip pattern P 1 and the second strip pattern P 2.
Specifically, when the first on-off element 126 is unlocked and makes information of voltage write the first electrode 122, first electrode 122 is applied in a voltage, and its magnitude of voltage is different from the magnitude of voltage of common electric voltage V, makes to have voltage difference between the first electrode 122 and the second electrode 124.Now, between each first strip pattern P 1 and the second adjacent strip pattern P 2, produce the first transverse electric field E1 via voltage difference, to change the arrangement of liquid crystal molecule in the first pixel 120.
Specifically, please refer to Fig. 5, between each first strip pattern P 1 and the second adjacent strip pattern P 2, produce the first transverse electric field E1, make the region between each first strip pattern P 1 and the second adjacent strip pattern P 2 be clear zone BR1.On the other hand, each first strip pattern P 1 does not have the first transverse electric field E1 with the region occupied by each second strip pattern P 2.Therefore, each first strip pattern P 1 is then dark space DR1 with the region occupied by each second strip pattern P 2.
In the present embodiment, each first strip pattern P 1 is identical with the width L1 of each second strip pattern P 2, and each first strip pattern P 1 is identical with the interval S 1 of the second adjacent strip pattern P 2, and the ratio of width L1 and interval S 1 is such as about 3:4, also namely the area ratio of clear zone BR1 and dark space DR1 is such as about 3:4.But in other embodiments, the ratio of width L1 and interval S 1 is such as about 3:3 or 3:5, and the present invention is not as restriction.
On the other hand, in the present embodiment, preferably, each second pixel 140 comprises the 3rd electrode 142 and the 4th electrode 144 that are electrically insulated each other.3rd electrode 142 has multiple Article 3 shape pattern P 3 be connected to each other, and the 4th electrode 144 also has multiple Article 4 shape pattern P 4 be connected to each other.Article 3 shape pattern P 3 is arranged in parallel and be connected to each other, and Article 4 shape pattern P 4 is arranged in parallel and be connected to each other.Article 3 shape pattern P 3 and Article 4 shape pattern P 4 are be alternately arranged, and Article 3 shape pattern P 3 is substantially parallel to Article 4 shape pattern P 4.Therefore, the 3rd electrode 142 and the 4th electrode 144 can be considered it is different finger electrode patterns, and the staggering mutually of these finger electrode patterns, as shown in Figure 4.
It should be noted that, in the present embodiment, when arrayed is on first substrate 110 with second substrate 130 respectively for the first pixel 120 and the second pixel 140, from the visual angle of vertical first substrate 110 with second substrate 130, the first strip pattern P 1 is intersected with Article 3 shape pattern P 3.Say further, in the present embodiment, the first strip pattern P 1 is substantially perpendicular to Article 3 shape pattern P 3, but the present invention is not as restriction.
Specifically, when the first pixel 120 arrayed is on first substrate 110, first strip pattern P 1 and the second strip pattern P 2 are distinguished arranged in parallel, and the first strip pattern P 1 and the second strip pattern P 2 are alternately arranged, and the first strip pattern P 1 is substantially parallel to the second strip pattern P 2.Therefore, the first strip pattern P 1 and the second strip pattern P 2 can be considered it is all arrange along first direction D1.
On the other hand, when the second pixel 140 arrayed is on second substrate 130, Article 3 shape pattern P 3 is arranged in parallel respectively with Article 4 shape pattern P 4, and Article 3 shape pattern P 3 and Article 4 shape pattern P 4 are alternately arranged, and Article 3 shape pattern P 3 is substantially parallel to Article 4 shape pattern P 4.Therefore, Article 3 shape pattern P 3 and Article 4 shape pattern P 4 can be considered it is all arrange along second direction D2.
In the present embodiment, the first strip pattern P 1 is intersected with Article 3 shape pattern P 3, and also namely first direction D1 is different from second direction D2.Therefore, when the first strip pattern P 1 arranged along first direction D1 is intersected with the Article 3 shape pattern P 3 arranged along second direction D2, first strip pattern P 1 is also intersected with the Article 4 shape pattern P 4 arranged along second direction D2, and also intersects with Article 3 shape pattern P 3 along the second strip pattern P 2 that first direction D1 arranges.Similarly, the second strip pattern P 2 is also intersected with the Article 4 shape pattern P 4 arranged along second direction D2.
In addition, in the present embodiment, the first strip pattern P 1 is substantially perpendicular to Article 3 shape pattern P 3 for example, and also namely first direction D1 is substantially perpendicular to second direction D2.Therefore, when the first strip pattern P 1 is substantially perpendicular to Article 3 shape pattern P 3, first strip pattern P 1 is substantially perpendicular to Article 4 shape pattern P 4, and the second strip pattern P 2 is substantially perpendicular to Article 3 shape pattern P 3, and the second strip pattern P 2 is substantially perpendicular to Article 4 shape pattern P 4.
Please refer to Fig. 3, in the present embodiment, each second pixel 140 more comprises at least one second switch element 146.In the present embodiment, second switch element 146 is such as bottom-gate-type transistor, but the present invention is not as restriction, and top gate-type transistors also can use.Moreover, the type that the first on-off element 126 is optionally identical or different with second switch element 146.3rd electrode 142 is electrically connected second switch element 146, and each signal line that second switch element 146 connects correspondence is such as sweep trace and data line, whether writes the 3rd electrode 142 with the information of voltage controlling each signal line further.On the other hand, the 4th electrode 144 is electrically coupled to common electric voltage V.Therefore, when the 3rd electrode 142 and the 4th electrode 144 are applied in suitable voltage respectively, the second pixel 140 is unlocked and makes to produce the second transverse electric field E2 between Article 3 shape pattern P 3 and Article 4 shape pattern P 4.
Specifically, when second switch element 146 is unlocked and makes information of voltage write the 3rd electrode 142,3rd electrode 142 is applied in a voltage, and its magnitude of voltage is different from the magnitude of voltage of common electric voltage V, makes to have voltage difference between the 3rd electrode 142 and the 4th electrode 144.Now, between each Article 3 shape pattern P 3 and adjacent Article 4 shape pattern P 4, produce the second transverse electric field E2 via voltage difference, to change the arrangement of liquid crystal molecule in the second pixel 140.
Specifically, please refer to Fig. 5, between each Article 3 shape pattern P 3 and adjacent Article 4 shape pattern P 4, produce the second transverse electric field E2, make the region between each Article 3 shape pattern P 3 and adjacent Article 4 shape pattern P 4 be clear zone BR2.On the other hand, each Article 3 shape pattern P 3 does not have the second transverse electric field E2 with the region occupied by each Article 4 shape pattern P 4.Therefore, each Article 3 shape pattern P 3 is then dark space DR2 with the region occupied by each Article 4 shape pattern P 4.
In the present embodiment, each Article 3 shape pattern P 3 is such as identical in fact with the width L2 of each Article 4 shape pattern P 4, and each Article 3 shape pattern P 3 is such as identical in fact with the interval S 2 of adjacent Article 4 shape pattern P 4, and the ratio of width L2 and interval S 2 is such as about 3:4, also namely the area ratio of clear zone BR2 and dark space DR2 is such as about 3:4.But in other embodiments, the ratio of width L2 and interval S 2 is such as about 3:3 or 3:5, and the present invention is not as restriction.
In the present embodiment, because the first strip pattern P 1 and the second strip pattern P 2 can be considered it is arrange along first direction D1, the first transverse electric field E1 therefore produced between each first strip pattern P 1 and the second adjacent strip pattern P 2 can be considered it is the electric field being substantially perpendicular to first direction D1.Similarly, the second transverse electric field E2 produced between each Article 3 shape pattern P 3 and adjacent Article 4 shape pattern P 4 can be considered it is the electric field being substantially perpendicular to second direction D2.Therefore, because the first direction D1 of the present embodiment is different from second direction D2, make the first transverse electric field E1 be different from the second transverse electric field E2.
Furthermore, the clear zone BR1 and the dark space DR1 that produce via the first transverse electric field E1 can be considered it is be alternately arranged with each other along first direction D1, and can be considered it is be alternately arranged with each other along second direction D2 via the clear zone BR2 of the second transverse electric field E2 generation and dark space DR2.Therefore, when the first pixel 120 and the second pixel 140 be arranged at respectively first substrate 110 with second substrate 130 and produce the first transverse electric field E1 and the second transverse electric field E2 respectively time, along first direction D1 arrangement clear zone BR1 and dark space DR1 and cross one another along the clear zone BR2 that second direction D2 arranges and dark space DR2.
Fig. 5 is the schematic diagram of the blue-phase liquid crystal display panel of Fig. 3 when being unlocked.Please refer to Fig. 5, in the present embodiment, first direction D1 is substantially perpendicular to second direction D2.Therefore, the first transverse electric field E1 is substantially perpendicular to the second transverse electric field E2.When arrayed is on first substrate 110 with second substrate 130 respectively for the first pixel 120 and the second pixel 140, from the visual angle of vertical first substrate 110 with second substrate 130, these clear zone BR1 arranged along first direction D1 become trellis with dark space DR1 and along the clear zone BR2 that second direction D2 arranges with dark space DR2 square crossing.
In the present embodiment, the infall of the infall of the infall of the first strip pattern P 1 and Article 3 shape pattern P 3, the first strip pattern P 1 and Article 4 shape pattern P 4, the second strip pattern P 2 and Article 3 shape pattern P 3 and the second strip pattern P 2 are defined as multiple dark space DR separated from one another with the infall of Article 4 shape pattern P 4.The infall of these strip patterns does not have the first transverse electric field E1 and the second transverse electric field E2.In other words, these infalls are that the dark space DR1 of the first pixel 120 originally and the dark space DR2 of the second pixel 140 overlap mutually the region formed.Therefore, blue-phase liquid crystal display panel 100 is at DR place, dark space not display brightness.
On the other hand, in the region that the first strip pattern P 1, second strip pattern P 2, Article 3 shape pattern P 3 and Article 4 shape pattern P 4 distribute, the subregion beyond the DR of dark space is defined as multiple clear zone BR separated from one another.The region of these clear zones BR occupied by strip pattern but get rid of the place overlapped with other strip pattern is also that the interval of the strip pattern of strip pattern and other direction overlaps mutually and the region that forms.Clear zone BR can be considered it is that dark space DR1 and clear zone BR2 overlap mutually or dark space DR2 and clear zone BR1 overlaps mutually and formed.Clear zone BR has the first transverse electric field E1 or the second transverse electric field E2.Therefore, blue-phase liquid crystal display panel 100 is at BR place, clear zone display brightness.
In addition, in the present embodiment, be not distributed with the first strip pattern P 1, second strip pattern P 2, Article 3 shape pattern P 3 is defined as semi-transparent district TR with the region of Article 4 shape pattern P 4.These semi-transparent district TR can be considered the region that the interval between interval between the strip pattern being first direction D1 and the strip pattern of second direction D2 overlaps mutually.In other words, semi-transparent district TR can be considered it is that clear zone BR1 and clear zone BR2 overlap mutually and formed.By Fig. 5 learn multiple edges of semi-transparent district TR be respectively by least two clear zone BR1 and at least two clear zone BR2 institute around, and make semi-transparent district TR between at least two clear zone BR1 and at least two clear zone BR2.Therefore, semi-transparent district TR has the first transverse electric field E1 and the second transverse electric field E2 simultaneously.Under the effect of the electric field of two different directions, blue-phase liquid crystal display panel 100 is at semi-transparent district TR place display brightness, but the brightness of semi-transparent district TR is between dark space DR and clear zone BR.
Therefore, the prior art of the present embodiment and Fig. 1 is compared.When blue-phase liquid crystal display panel 50 is equal with spacing ratio with the width of the strip pattern of blue-phase liquid crystal display panel 100, blue-phase liquid crystal display panel 100 can the region of display brightness compared with blue-phase liquid crystal display panel more than 50 semi-transparent district TR.Although the brightness of semi-transparent district TR is not as clear zone BR, semi-transparent district TR still improves the penetrance of blue-phase liquid crystal display panel 100 on the whole.
Now, blue-phase liquid crystal display panel 100 produces the first transverse electric field E1 and the second transverse electric field E2 with show image via unlatching first pixel 120 and the second pixel 140.Therefore, when driving blue-phase liquid crystal display panel 100, the first electrode 122 and the second electrode 124 can be driven to produce the first transverse electric field E1 and to drive the 3rd electrode 142 and the 4th electrode 144 to produce the second transverse electric field E2 simultaneously, or first drive the 3rd electrode 142 and the 4th electrode 144 with after producing the second transverse electric field E2, drive the first electrode 122 and the second electrode 124 to produce the first transverse electric field E1 again, and make blue phase liquid crystal layer 150 show image.
It should be noted that, first transverse electric field E1 and the second transverse electric field E2 determines the arrangement mode of blue phase liquid crystal layer 150 jointly, and deposit in case at the second transverse electric field E2, the the first transverse electric field E1 provided by the first electrode 122 and the second electrode 124 can be further reduced, and then reaches the effect reducing driving voltage.
Fig. 6 is the driving voltage-penetrance curve (V-T curves) of the blue-phase liquid crystal display panel of Fig. 3 and the existing blue-phase liquid crystal display panel of Fig. 1.Please refer to Fig. 6, the blue-phase liquid crystal display panel 50 of prior art only arranges the pixel cell 54 of plane conversion type at infrabasal plate 52, and pixel cell 54 has pixel electrode 54a and common electrode 54b.Relatively, the present embodiment arranges the first pixel 120 and the second pixel 140 respectively on first substrate 110 with second substrate 130, wherein the first pixel 120 comprises the first electrode 122 and the second electrode 124, and the second pixel 140 comprises the 3rd electrode 142 and the 4th electrode 144, and the strip pattern square crossing of each electrode of the strip pattern of each electrode of the first pixel 120 and the second pixel 140.
From two relation curves of Fig. 6, when identical penetrance, the driving voltage needed for blue-phase liquid crystal display panel 100 (the present embodiment) is lower than the driving voltage needed for blue-phase liquid crystal display panel 50 (prior art).Therefore, the electric field of two different directions of blue-phase liquid crystal display panel 100 contributes to the driving voltage reducing blue-phase liquid crystal display panel 100.In addition, when same drive voltage, the penetrance of blue-phase liquid crystal display panel 100 (the present embodiment) is higher than the penetrance of blue-phase liquid crystal display panel 50 (prior art).Therefore, the electric field of two different directions of blue-phase liquid crystal display panel 100 contributes to the penetrance improving blue-phase liquid crystal display panel 100.
In sum, the present invention proposes a kind of blue-phase liquid crystal display panel, and it arranges the first pixel and the second pixel respectively on the substrate of two relative configurations.First pixel and the second pixel have multiple pattern respectively and are alternately arranged and electrode parallel to each other, and wherein the first pixel is intersected with the electrode pattern of the second pixel, and blue phase liquid crystal layer is configured between the first pixel and the second pixel.Therefore, the first pixel and the second pixel produce the first transverse electric field and the second transverse electric field respectively, make blue-phase liquid crystal display panel be divided into multiple dark space, clear zone and semi-transparent district according to shown gray-scale intensity.Accordingly, blue-phase liquid crystal display panel has lower driving voltage and higher penetrance.
Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art can make various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection domain that all should belong to the claims in the present invention.
Claims (8)
1. a blue-phase liquid crystal display panel, is characterized in that, comprising:
One first substrate;
Multiple first pixel, arrayed is on this first substrate, respectively this first pixel comprises one first electrode and one second electrode that are electrically insulated each other, wherein this first electrode has multiple the first strip pattern be connected to each other, this second electrode has multiple the second strip pattern be connected to each other, and those first strip patterns and those the second strip patterns are alternately arranged, and those first strip patterns are substantially parallel to those the second strip patterns;
One second substrate, is oppositely disposed with this first substrate;
Multiple second pixel, arrayed is on this second substrate, respectively this second pixel comprises one the 3rd electrode and one the 4th electrode that are electrically insulated each other, wherein the 3rd electrode has multiple Article 3 shape pattern be connected to each other, 4th electrode has multiple Article 4 shape pattern be connected to each other, those Article 3 shape patterns and those Article 4 shape patterns are alternately arranged, and those Article 3 shape patterns are substantially parallel to those Article 4 shape patterns, and those first strip patterns intersect with those Article 3 shape patterns, first strip pattern and the second strip pattern all arrange along first direction, Article 3 shape pattern and Article 4 shape pattern all arrange along second direction, first direction is different from second direction, and
One blue phase liquid crystal layer, is configured between those first pixels and those the second pixels.
2. blue-phase liquid crystal display panel according to claim 1, it is characterized in that, respectively this first pixel more comprises first on-off element be electrically connected with this first electrode, respectively this second pixel more comprises a second switch element is electrically connected with the 3rd electrode, wherein respectively this second electrode and respectively the 4th electrode be electrically coupled to a common electric voltage.
3. blue-phase liquid crystal display panel according to claim 1, it is characterized in that, those first strip patterns intersect with those Article 4 shape patterns, and those second strip patterns intersect with those Article 3 shape patterns, and those second strip patterns intersect with those Article 4 shape patterns.
4. blue-phase liquid crystal display panel according to claim 3, it is characterized in that, respectively produce one first transverse electric field between this first strip pattern and second adjacent strip pattern, respectively produce one second transverse electric field between this Article 3 shape pattern and adjacent Article 4 shape pattern, and this first transverse electric field is different from this second transverse electric field.
5. blue-phase liquid crystal display panel according to claim 4, it is characterized in that, the infall of those first strip patterns and those Article 3 shape patterns, the infall of those first strip patterns and those Article 4 shape patterns, the infall of those second strip patterns and those Article 3 shape patterns and the infall of those the second strip patterns and those Article 4 shape patterns are defined as multiple dark space separated from one another, and at the first strip pattern, second strip pattern, in the region that Article 3 shape pattern and Article 4 shape pattern distribute, subregion beyond those dark spaces is defined as multiple clear zone separated from one another, and be not distributed with the first strip pattern, second strip pattern, the region of Article 3 shape pattern and Article 4 shape pattern is defined as semi-transparent district.
6. blue-phase liquid crystal display panel according to claim 1, is characterized in that, those first strip patterns are perpendicular to those Article 3 shape patterns.
7. blue-phase liquid crystal display panel according to claim 6, it is characterized in that, those first strip patterns are perpendicular to those Article 4 shape patterns, and those second strip patterns are perpendicular to those Article 3 shape patterns, and those second strip patterns are perpendicular to those Article 4 shape patterns.
8. blue-phase liquid crystal display panel according to claim 7, it is characterized in that, respectively produce one first transverse electric field between this first strip pattern and second adjacent strip pattern, respectively produce one second transverse electric field between this Article 3 shape pattern and adjacent Article 4 shape pattern, and this first transverse electric field is substantially perpendicular to this second transverse electric field.
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| TW101122231A TWI465818B (en) | 2012-06-21 | 2012-06-21 | Blue phase liquid crystal display panel |
| TW101122231 | 2012-06-21 |
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| CN103744234A (en) * | 2013-11-28 | 2014-04-23 | 深圳市华星光电技术有限公司 | Blue-phase liquid crystal display panel |
| TWI608280B (en) * | 2017-03-06 | 2017-12-11 | 友達光電股份有限公司 | Array substrate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2007058007A (en) * | 2005-08-26 | 2007-03-08 | Sanyo Epson Imaging Devices Corp | Liquid crystal device and electronic apparatus |
| KR100887497B1 (en) * | 2008-06-02 | 2009-03-10 | 전북대학교산학협력단 | Fringe in-plane field switching liquid crystal display |
| CN102314030A (en) * | 2010-12-29 | 2012-01-11 | 友达光电股份有限公司 | Blue phase liquid crystal display panel and driving method thereof |
| CN102368126A (en) * | 2011-04-29 | 2012-03-07 | 友达光电股份有限公司 | Blue phase liquid crystal display panel |
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| KR20080050851A (en) * | 2006-12-04 | 2008-06-10 | 삼성전자주식회사 | Liquid crystal display panel |
| US8377331B2 (en) * | 2009-09-29 | 2013-02-19 | University Of Central Florida Research Foundation, Inc. | Liquid crystals composition and liquid crystal display with patterned electrodes |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007058007A (en) * | 2005-08-26 | 2007-03-08 | Sanyo Epson Imaging Devices Corp | Liquid crystal device and electronic apparatus |
| KR100887497B1 (en) * | 2008-06-02 | 2009-03-10 | 전북대학교산학협력단 | Fringe in-plane field switching liquid crystal display |
| CN102314030A (en) * | 2010-12-29 | 2012-01-11 | 友达光电股份有限公司 | Blue phase liquid crystal display panel and driving method thereof |
| CN102368126A (en) * | 2011-04-29 | 2012-03-07 | 友达光电股份有限公司 | Blue phase liquid crystal display panel |
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| CN102879956A (en) | 2013-01-16 |
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