CN108873535B - Liquid crystal display panel - Google Patents
Liquid crystal display panel Download PDFInfo
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- CN108873535B CN108873535B CN201810953408.9A CN201810953408A CN108873535B CN 108873535 B CN108873535 B CN 108873535B CN 201810953408 A CN201810953408 A CN 201810953408A CN 108873535 B CN108873535 B CN 108873535B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 234
- 239000000203 mixture Substances 0.000 claims abstract description 120
- 239000000758 substrate Substances 0.000 claims abstract description 47
- 238000005452 bending Methods 0.000 claims abstract description 18
- 238000002834 transmittance Methods 0.000 claims description 79
- 241001270131 Agaricus moelleri Species 0.000 claims description 3
- 238000012360 testing method Methods 0.000 description 40
- 230000000052 comparative effect Effects 0.000 description 30
- 101100208473 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) lcm-2 gene Proteins 0.000 description 29
- 230000005684 electric field Effects 0.000 description 14
- 230000005540 biological transmission Effects 0.000 description 12
- 101100224481 Dictyostelium discoideum pole gene Proteins 0.000 description 8
- 101150046160 POL1 gene Proteins 0.000 description 8
- 101150110488 POL2 gene Proteins 0.000 description 8
- 101100117436 Thermus aquaticus polA gene Proteins 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- -1 Aluminum Tin Oxide Chemical compound 0.000 description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- JAONJTDQXUSBGG-UHFFFAOYSA-N dialuminum;dizinc;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Al+3].[Zn+2].[Zn+2] JAONJTDQXUSBGG-UHFFFAOYSA-N 0.000 description 2
- 229910052733 gallium Inorganic materials 0.000 description 2
- 229910052738 indium Inorganic materials 0.000 description 2
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 2
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 2
- 230000003071 parasitic effect Effects 0.000 description 2
- 239000003504 photosensitizing agent Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 102200023403 rs244903 Human genes 0.000 description 2
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 101100388071 Thermococcus sp. (strain GE8) pol gene Proteins 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/139—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/13706—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering the liquid crystal having positive dielectric anisotropy
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Liquid Crystal Substances (AREA)
Abstract
A liquid crystal display panel comprises a first substrate, a pixel array, a first alignment film, a second substrate, a common electrode, a second alignment film and a liquid crystal composition. The pixel array is arranged on the first substrate. The first alignment film is disposed on the pixel array and has a first alignment direction. The second substrate is arranged opposite to the first substrate. The common electrode is disposed on the second substrate. The second alignment film is disposed on the common electrode and has a second alignment direction. The first alignment direction and the second alignment direction are staggered. The liquid crystal composition is arranged between the first alignment film and the second alignment film. The liquid crystal composition had the following properties: delta epsilon>0 and K11/K330.9533 or less, wherein Deltaepsilon is dielectric anisotropy of the liquid crystal composition, K11Is the coefficient of expansion elasticity, K, of the liquid crystal composition33Is the bending elastic coefficient of the liquid crystal composition.
Description
Technical Field
The present invention relates to a display panel, and more particularly, to a liquid crystal display panel.
Background
In recent years, products related to electronic competitions have grown up in the entertainment market, thereby driving the demand for graphics display cards, computer peripherals, display panels, or other related hardware devices. In a typical electronic competition game, the game contents are High-speed dynamic images, so that the performance of the display panel plays a major role in the visual perception of the player, and a display panel with a High frame rate has become one of the major points in the development of each panel factory.
However, parasitic capacitance exists between the driving lines (e.g., the common electrode lines and the data lines) of the display panel, and when the frame rate is increased from 144Hz, which is the mainstream in the current market, to 240Hz or higher, the parasitic capacitance causes display signal Crosstalk (H Crosstalk) of the display panel. Therefore, how to develop a display panel with a high frame rate and a slight display signal crosstalk is one of efforts of various panel manufacturers.
Disclosure of Invention
The invention provides a liquid crystal display panel with good performance.
The liquid crystal display panel comprises a first substrate, a pixel array, a first alignment film, a second substrate, a common electrode, a second alignment film and a liquid crystal composition. The pixel array is arranged on the first substrate. The first alignment film is disposed on the pixel array and has a first alignment direction. The second substrate is arranged opposite to the first substrate. The common electrode is disposed on the second substrate. The second alignment film is disposed on the common electrode and has a second alignment direction. Wherein the first alignment direction and the second alignment direction are staggered. The liquid crystal composition is arranged between the first alignment film and the second alignment film and has the following properties: delta epsilon>0 and K11/K330.9533 or less, wherein Deltaepsilon is dielectric anisotropy of the liquid crystal composition, K11Is the coefficient of expansion elasticity, K, of the liquid crystal composition33Is the bending elastic coefficient of the liquid crystal composition.
In an embodiment of the invention, the liquid crystal composition has a voltage versus transmittance curve, the first voltage corresponds to 64 gray scales of the lcd panel, and the curve has a first tangent slope under the first voltage
While
In an embodiment of the invention, the liquid crystal composition has a voltage versus transmittance curve, the second voltage corresponds to a 128 gray scale of the liquid crystal display panel, and the curve has a second tangent slope under the second voltage
While
In an embodiment of the invention, the liquid crystal composition has a voltage versus transmittance curve, the third voltage corresponds to 192 gray levels of the liquid crystal display panel, and the curve has a third tangent slope under the third voltage
While
In an embodiment of the invention, the liquid crystal composition has a voltage versus transmittance curve, the second voltage corresponds to a 128 gray scale of the liquid crystal display panel, and the curve has a second tangent slope under the second voltage
The third voltage corresponds to 192 gray scale of the LCD panel, and the curve has a third tangent slope under the third voltage
While
In an embodiment of the invention, the liquid crystal composition has a voltage versus transmittance curve, the first voltage corresponds to 64 gray scales of the lcd panel, and the curve has a first tangent slope under the first voltage
The third voltage corresponds to 192 gray scale of the LCD panel, and the curve has a third tangent slope under the third voltage
While
In an embodiment of the invention, K of the liquid crystal composition11≤10.2(pN)。
In an embodiment of the invention, K of the liquid crystal composition33≤10.7(pN)。
In an embodiment of the invention, the liquid crystal display panel further includes: the color filter layer is configured on the first substrate or the second substrate.
Based on the above, the liquid crystal display panel according to the embodiment of the invention can reduce the rate of change of the transmittance of the liquid crystal composition to the voltage in the specific gray scale range by properly designing the physical parameters of the liquid crystal composition, thereby reducing the display signal crosstalk (HCrosstalk) generated by the liquid crystal display panel under the high frequency operation.
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a schematic cross-sectional view of a liquid crystal display panel according to a first embodiment of the invention.
Fig. 2 is a schematic top view of the first substrate, the pixel array and the first alignment film of the liquid crystal display panel of fig. 1.
Fig. 3 illustrates the first polarizing film, the first alignment film, the liquid crystal molecules, the second alignment film, and the second polarizing film in the local area I of the liquid crystal display panel of fig. 1.
Fig. 4 illustrates the first polarizing film, the first alignment film, the liquid crystal molecules, the second alignment film, and the second polarizing film in the local area I of the liquid crystal display panel of fig. 1.
Fig. 5 is a schematic cross-sectional view of a liquid crystal display panel according to a second embodiment of the invention.
Fig. 6 is a schematic cross-sectional view of a liquid crystal display panel of a comparative example.
Fig. 7 is a graph of voltage versus transmittance of the liquid crystal compositions of the comparative example, the first example and the second example of the present invention.
Description of reference numerals:
10. 10A, 20: liquid crystal display panel
100: first substrate
150: pixel electrode
200: second substrate
250: common electrode
300: color filter layer
AL 1: first alignment film
AL 2: second alignment film
DL: data line
d: gap
E. E': electric field
I: region(s)
LC: liquid crystal molecules
LCM0, LCM1, LCM 2: liquid crystal composition
PA: pixel array
POL 1: first polarizing film
POL 2: second polarizing film
PX: pixel
RD 1: first alignment direction
RD 2: second alignment direction
SL: scanning line
T: active component
TA 1: first light transmission shaft
TA 2: second light transmission shaft
V1: first voltage
V2: second voltage
V3: third voltage
VT0, VT1, VT 2: curve line
ΔVL192、ΔVL128、ΔVL64: difference in voltage
ΔTL192、ΔTL128、ΔTL64: difference in penetration rate
Detailed Description
Fig. 1 is a schematic cross-sectional view of a liquid crystal display panel 10 according to a first embodiment of the invention. Fig. 2 is a schematic top view of the first substrate 100, the pixel array PA and the first alignment film AL1 of the liquid crystal display panel 10 of fig. 1. The structure of the liquid crystal display panel 10 of the present embodiment will be described below with reference to fig. 1 and 2.
Referring to fig. 1, the lcd panel 10 includes a first substrate 100, a pixel array PA, and a first alignment film AL 1. The pixel array PA is disposed on the first substrate 100. The first alignment film AL1 is disposed on the pixel array PA. Referring to fig. 1 and 2, the pixel array PA includes a plurality of pixels PX arranged in an array. For example, in the present embodiment, each pixel PX includes an active device T and a pixel electrode 150 electrically connected to the active device T. The first alignment film AL1 may completely cover each pixel PX of the pixel array PA. Referring to fig. 2, in the present embodiment, the pixel array PA further includes a plurality of data lines DL and a plurality of scan lines SL, wherein the plurality of data lines DL and the plurality of scan lines SL are disposed in a staggered manner, and each active device T is electrically connected to a corresponding data line DL and a corresponding scan line SL. It should be noted that the pixel array PA shown in fig. 2 is only for illustrating the present invention, and not for limiting the present invention. In other embodiments, the pixel array PA may have other suitable patterns.
Referring to fig. 1, the lcd panel 10 includes a second substrate 200, a common electrode 250, and a second alignment film AL 2. The second substrate 200 is disposed opposite to the first substrate 100. The common electrode 250 is disposed on the second substrate 200. The second alignment film AL2 is disposed on the common electrode 250. For example, in the present embodiment, the common electrode 250 and the pixel electrode 150 may be selectively both light-transmitting electrodes, and the material of the light-transmitting electrodes includes Indium Tin Oxide (Indium Tin Oxide), Indium Zinc Oxide (Indium Zinc Oxide), Aluminum Tin Oxide (Aluminum Tin Oxide), Aluminum Zinc Oxide (Aluminum Zinc Oxide), Indium Gallium Zinc Oxide (Indium Gallium Zinc Oxide), other suitable oxides, or a stacked layer of at least two of the foregoing, but the invention is not limited thereto. In the present embodiment, the liquid crystal display panel 10 may further optionally include a color filter layer 300. The color filter layer 300 is disposed on the second substrate 200 and between the common electrode 250 and the second substrate 200. However, the invention is not limited thereto, and in another embodiment, the color filter layer 300 may also be disposed on the first substrate 100; in yet another embodiment, the provision of the color filter layer 300 may also be omitted.
Referring to fig. 1, the liquid crystal display panel 10 includes a liquid crystal composition LCM1, wherein the liquid crystal composition LCM1 is disposed between a first alignment film AL1 and a second alignment film AL 2. The liquid crystal composition LCM1 disposed in the liquid crystal display panel 10 has a thickness, and the thickness of the liquid crystal composition LCM1 is substantially equal to the distance between the first alignment film AL1 and the second alignment film AL2, i.e., the gap d (cell gap) of the liquid crystal display panel 10.
In the present embodiment, the liquid crystal composition LCM1 includes a positive type liquid crystal. Δ ∈ >0, where Δ ∈ is the Dielectric anisotropy (Dielectric anisotropy) of the positive-type liquid crystal of the liquid crystal composition LCM 1. When a voltage is present between the pixel electrode 150 and the common electrode 250, for example: when the common electrode 250 is grounded and the pixel electrode 150 has a specific potential, an electric field E is formed between the pixel electrode 150 and the common electrode 250. In the present embodiment, since the liquid crystal composition LCM1 has the characteristic that Δ ∈ >0, when the electric field E is large enough, the long axis of the liquid crystal molecules LC tends to align parallel to the electric field E.
In the present embodiment, the liquid crystal composition LCM1 further has K11And K33In which K is11Is the expansion elastic constant (modulus) of LCM1 of the liquid crystal composition, and K33The bending modulus (Bend elastic constant) of the liquid crystal composition LCM1 was obtained. When the liquid crystal composition LCM1 is subjected to the electric field E, the liquid crystal composition LCM1 is also subjected to the alignment effects of the first alignment film AL1 and the second alignment film AL 2. Having a coefficient of expansion elasticity K11And bending elastic coefficient K33Under the sufficiently large electric field E and the orientation effect of the first alignment film AL1 and the second alignment film AL2, most of the liquid crystal molecules LC in the liquid crystal composition LCM1 have long axes parallel to the electric field E, and a small portion of the liquid crystal molecules LC close to the first alignment film AL1 and the second alignment film AL2 have long axes deviated from the electric field E, wherein the longer the liquid crystal molecules LC is close to the first alignment film AL1 and the second alignment film AL2, the more the long axes are deviated from the electric field E.
Referring to fig. 1, in the present embodiment, the liquid crystal display panel 10 may further include a first polarizing film POL1 and a second polarizing film POL2, wherein the first polarizing film POL1 is disposed on a side of the first substrate 100 away from the second substrate 200, and the second polarizing film POL2 is disposed on a side of the second substrate 200 away from the first substrate 100. However, the present invention is not limited thereto, and in other embodiments, the first polarizing film POL1 may be disposed between the first substrate 100 and the liquid crystal composition LCM1, and the second polarizing film POL2 may be disposed between the second substrate 200 and the liquid crystal composition LCM1, that is, the first polarizing film POL1 and the second polarizing film POL2 may be in-cell polarizers (in-cell polarizers).
Fig. 3 illustrates the first polarizing film POL1, the first alignment film AL1, the liquid crystal molecules LC, the second alignment film AL2, and the second polarizing film POL2 in the local region I of the liquid crystal display panel 10 of fig. 1. In particular, fig. 3 shows the arrangement of the liquid crystal molecules LC under the action of the electric field E when a voltage is applied between the pixel electrode 150 and the common electrode 250. Referring to fig. 3, in the present embodiment, the first alignment film AL1 has a first alignment direction (rubbing direction) RD1, and the second alignment film AL2 has a second alignment direction RD2, wherein the first alignment direction RD1 and the second alignment direction RD2 are mutually crossed. For example, in the embodiment, the first alignment direction RD1 may be perpendicular to the second alignment direction RD2, but the invention is not limited thereto. In addition, the first polarizing film POL1 has a first transmission axis TA1, and the second polarizing film POL2 has a second transmission axis TA 2. In the present embodiment, the first light transmission axis TA1 and the second light transmission axis TA2 may be substantially parallel to the first alignment direction RD1 and the second alignment direction RD2, respectively; that is, the first light transmission axis TA1 may be perpendicular to the second light transmission axis TA2, but the invention is not limited thereto.
In this embodiment, the relative arrangement relationship between the first alignment direction RD1 of the first alignment film AL1, the second alignment direction RD2 of the second alignment film AL2, the first light transmission axis TA1 of the first polarizing film POL1, and the second light transmission axis TA2 of the second polarizing film POL2 corresponds to a Normally white (normal white) display mode in a Twisted Nematic (TN) mode. In other words, the liquid crystal display panel 10 has the maximum Transmittance (Transmittance) when the liquid crystal composition LCM cannot be driven due to the substantial absence of the voltage V between the pixel electrode 150 and the common electrode 250, but the invention is not limited thereto.
Fig. 4 illustrates the first polarizing film POL1, the first alignment film AL1, the liquid crystal molecules LC, the second alignment film AL2, and the second polarizing film POL2 in the local region I of the liquid crystal display panel 10 of fig. 1. In particular, fig. 4 illustrates the arrangement of the liquid crystal molecules LC when the absolute value of the electric field E 'between the pixel electrode 150 and the common electrode 250 is large (i.e., | E' | > | E |). Referring to fig. 4, when a large electric field E 'exists between the pixel electrode 150 and the common electrode 250, in the liquid crystal composition LCM1, the number of liquid crystal molecules LC whose major axes are arranged along the electric field E' is large, and the transmittance of the liquid crystal display panel 10 is small. In particular, the liquid crystal display panel 10 has the behavior of minimum transmittance when almost all the long axes of the liquid crystal molecules LC are aligned parallel to the electric field E.
In the embodiment, the liquid crystal composition LCM1 further includes a Chiral dopant (not shown) that enables the liquid crystal molecules LC to be aligned in a spiral shape along a clockwise or counterclockwise direction and stacked between the first alignment film AL1 and the second alignment film AL2, but the invention is not limited thereto.
Fig. 5 is a schematic cross-sectional view of a liquid crystal display panel 10A according to a second embodiment of the invention. The liquid crystal display panel 10A of the second embodiment is similar to the liquid crystal display panel 10 of the first embodiment, and the difference therebetween is only that: the liquid crystal composition LCM2 of the liquid crystal display panel 10A is different from the liquid crystal composition LCM1 of the liquid crystal display panel 10. The difference between the liquid crystal composition LCM2 of the second embodiment and the liquid crystal composition LCM1 of the first embodiment is mainly described below, and other components and relative relationships of the liquid crystal display panel 10A of the second embodiment are referred to the above description, and thus will not be repeated.
Referring to fig. 5, the liquid crystal composition LCM2 of the second embodiment also includes positive liquid crystal molecules LC and a photosensitizer. The liquid crystal composition LCM2 of the second embodiment is different from the liquid crystal composition LCM1 of the first embodiment mainly in dielectric anisotropy Δ ε and expansion modulus K11And bending elastic coefficient K33Slightly different.The liquid crystal composition LCM1 and LCM2 have dielectric anisotropy Delta epsilon and expansion elastic coefficient K11And bending elastic coefficient K33Please refer to table one below.
[ watch one ]
Fig. 6 is a schematic cross-sectional view of a liquid crystal display panel 20 of a comparative example. The liquid crystal display panel 20 of the comparative example is similar to the liquid crystal display panel 10 of the first embodiment, and the difference therebetween is only: the liquid crystal composition LCM0 of the liquid crystal display panel 20 of the comparative example is different from the liquid crystal composition LCM1 of the liquid crystal display panel 10 of the first embodiment. The other components of the liquid crystal display panel 20 of the comparative example and their relative relationships are referred to the above description, and will not be repeated here.
Referring to fig. 6, the liquid crystal composition LCM0 of the comparative example also includes positive liquid crystal molecules LC and a photosensitizer. The liquid crystal composition LCM0 of the comparative example and the liquid crystal composition LCM1 of the first example are mainly different in dielectric anisotropy Δ ε and expansion modulus K11And bending elastic coefficient K33In contrast, the liquid crystal composition LCM0 of the specific comparative example had dielectric anisotropy Δ ε and extensional elastic modulus K11And bending elastic coefficient K33Please refer to table one above.
Fig. 7 is a graph of voltage versus transmittance of the liquid crystal compositions LCM0, LCM1, and LCM2 of the comparative example, the first example, and the second example of the present invention. Referring to fig. 7, a curve VT0 represents a voltage vs. transmittance curve of the liquid crystal composition LCM0 of the comparative example, a curve VT1 represents a voltage vs. transmittance curve of the liquid crystal composition LCM1 of the first embodiment, and a curve VT2 represents a voltage vs. transmittance curve of the liquid crystal composition LCM1 of the second embodiment.
The curves VT0, VT1, VT2 of fig. 7 were measured in the following manner. First, the liquid crystal compositions LCM0, LCM1, and LCM2 were disposed in the first liquid crystal Test cell (Test cell). Each of the first liquid crystal test cells (not shown) includes an upper light-transmitting substrate, an upper light-transmitting electrode entirely covering an inner surface of the upper light-transmitting substrate, an upper alignment film covering the upper light-transmitting electrode, a lower light-transmitting substrate disposed opposite to the upper light-transmitting substrate, a lower light-transmitting electrode entirely covering an inner surface of the lower light-transmitting substrate, a lower alignment film covering the lower light-transmitting electrode, a liquid crystal composition LCM0, LCM1 or LCM2 disposed between the upper alignment film and the lower alignment film, an upper polarizing film disposed on an outer surface of the upper light-transmitting substrate, and a lower polarizing film disposed on an outer surface of the lower light-transmitting substrate, wherein the alignment direction of the upper alignment film and the alignment direction of the lower alignment film are perpendicular to each other, the light transmission axis of the upper polarizing film and the light transmission axis of the lower polarizing film can be substantially parallel to the alignment direction of the upper alignment film and the alignment direction of the lower alignment film, respectively, and the gap (cell gap) of the first liquid crystal test cell is 3.0 μm. Next, a liquid crystal test cell having each of the liquid crystal compositions LCM0, LCM1, and LCM2 was set on a backlight. The backlight is, for example, a Light Emitting Diode (LED) type backlight, but the invention is not limited thereto. Secondly, one of the upper light-transmitting electrode and the lower light-transmitting electrode of the first liquid crystal test box is grounded, a test voltage signal is applied to the other of the upper light-transmitting electrode and the lower light-transmitting electrode, the frequency of the test voltage signal is 60Hz, and the amplitude of the test voltage signal is gradually adjusted from 0V to 6.5V in sequence; the brightness (Luminance) of the first LC cell at the amplitude of each test voltage signal is measured by a Luminance meter (e.g., color analyzer CA-310) during the process of gradually adjusting the amplitude of the test voltage signal from 0V to 6.5V in sequence. Then, the luminance measured by the first liquid crystal test cell at each amplitude of the test voltage signal is divided by the maximum luminance measured by the first liquid crystal test cell within the amplitude range of the test voltage signal, so as to obtain the transmittance of the first liquid crystal test cell at each amplitude of the test voltage signal, thereby completing the voltage-to-transmittance curves VT0, VT1, VT2 shown in fig. 7.
Further, the liquid crystal compositions LCM0, LCM1 and LCM2 of the comparative examples, the first example and the second exampleAnisotropy of dielectric constant Deltaε and coefficient of expansion elasticity K11Bending elastic coefficient K33Respectively as in table one above. The dielectric anisotropy Δ ∈ and the expansion elastic coefficient K in table one will be referred to below11And bending elastic coefficient K33The measurement method of (3) is explained.
First, a second liquid crystal test cassette (not shown) is provided, and each of the liquid crystal compositions LCM0, LCM1, and LCM2 is disposed on the respective second liquid crystal test cassette. The second liquid crystal test cell has a similar configuration to that of the first liquid crystal test cell, and the difference therebetween is that: the alignment direction of the upper alignment film of the second liquid crystal test cell is opposite to that of the lower alignment film, that is, the alignment direction of the upper alignment film is inversely parallel (Anti-parallel) to that of the lower alignment film; the gap of the second liquid crystal test box is 7.7 mu m; the second liquid crystal test box can omit the arrangement of the upper polarizing film and the lower polarizing film. For example, the upper transparent electrode and the lower transparent electrode of the second liquid crystal test box are substantially overlapped with each other, and the areas a of the upper transparent electrode and the lower transparent electrode of the second liquid crystal test box can both be 1cm2. Then, at the ambient temperature of 25 ℃, one of the upper transparent electrode and the lower transparent electrode of the second liquid crystal test box is grounded, and a test voltage signal is applied to the other of the upper transparent electrode and the lower transparent electrode of the second liquid crystal test box, the frequency of the test voltage signal is 1kHz, and the amplitude of the test voltage signal is gradually adjusted from 0V to 20V in sequence; and synchronously measuring the capacitance C of the second liquid crystal test box under different voltage signal amplitudes in the process of gradually adjusting the amplitude of the test voltage signal from 0V to 20V in sequence to obtain a curve of the capacitance of the second liquid crystal test box to the voltage. When the amplitudes of the voltages are 0V and 20V, the capacitances of the second liquid crystal test cell are C⊥And C//Using the following formula: (C)//-C⊥)d/ε0A, dielectric anisotropy Deltaε of each of the liquid crystal compositions LCM0, LCM1 and LCM2 was calculated, wherein ε0Is a vacuum dielectric constant (transmittance of free space), d is a gap (cell gap) of the second liquid crystal test cell, and A is an area of the upper transparent electrode and an area of the lower transparent electrode.
In addition, a second liquid crystal testThe test cell having an initial voltage value VthWhen a voltage V is applied between the upper and lower light-transmitting electrodes<VthThe capacitance C of the second liquid crystal test box and the capacitance C when no voltage is applied⊥Are substantially the same; when the voltage V applied between the upper and lower transparent electrodes is not less than VthAt this time, the capacitance C of the second liquid crystal test box begins to increase and approaches the capacitance C with the increase of the voltage//. Therefore, the initial voltage value V can be obtained from the curve of the capacitance of the second liquid crystal test box to the voltagethWill VthSubstituting the following formula: k11＝Δεε0(Vth/π)2So as to obtain the expansion elastic coefficient K11. Further, the coefficient of elasticity K is expanded11Substituting the following formula: k33＝K11(K +1), the bending modulus K can be obtained33Where the coefficient κ is obtained by Fitting (Fitting) a curve of capacitance versus voltage.
Referring to FIG. 7 and the above table, in the embodiment of the invention, the liquid crystal compositions LCM1 and LCM2 have the expansion elastic coefficient K11And bending elastic coefficient K33The expansion elastic coefficient K of the liquid crystal composition LCM0 is less than that of the comparative example11And bending elastic coefficient K33. Curves VT1 and VT2 of the voltage vs. transmittance of the liquid crystal compositions LCM1 and LCM2 are shifted to the left with respect to a curve VT0 of the voltage vs. transmittance of the liquid crystal composition LCM 0. For example, in the embodiments of the present invention, the liquid crystal compositions LCM1, LCM2 have the expansion elastic modulus K11Less than or equal to 10.2pN and a bending elasticity coefficient K33Less than or equal to 10.7pN, but the invention is not limited to the method.
In the examples of the present invention, the liquid crystal compositions LCM1, LCM2 have the expansion elastic modulus K11And bending elastic coefficient K33The ratios of (A) to (B) are less than the extensional elastic modulus K of the liquid crystal composition LCM0 of the comparative example11And bending elastic coefficient K33The ratio of (a) to (b). For example, in the embodiments of the present invention, the liquid crystal compositions LCM1, LCM2 have the expansion elastic modulus K11And bending elastic coefficient K33Ratio K of11/K33Less than or equal to 0.9533. Thereby, the liquid crystal composition LC was compared with the comparative exampleThe curves VT0 of the voltage vs. transmittance of M0, VT1 and VT2 of the voltage vs. transmittance of the liquid crystal compositions LCM1 and LCM2 in the examples of the present invention have a gentle line shape in the range of the transmittance of 40% to 60%, and have a gentle line shape in the range of the transmittance of 0% to 30%.
Referring to fig. 7 and the table one above, the liquid crystal display panel 20 of the comparative example, the liquid crystal display panel 10 of the first embodiment, and the liquid crystal display panel 10A of the second embodiment have the 64 th gray scale, the 128 th gray scale, and the 192 th gray scale respectively corresponding to the first voltage V1, the second voltage V2, and the third voltage V3 between the pixel electrode 150 and the common electrode 250. The voltage vs. transmittance curves VT0, VT1 and VT2 of each liquid crystal composition LCM0, LCM1 and LCM2 have a first tangent slope at a first voltage V1
Wherein Δ VL64Δ T is a difference between a maximum voltage and a minimum voltage in a first voltage range covering a first voltage V1L64The difference between the maximum transmittance and the minimum transmittance of the liquid crystal display panel in a first voltage range, such as V1-0.02V to V1+0.02V, is provided. In the embodiment of the invention, the first tangent slope of the voltage-to-transmittance curves VT1 and VT2 of the liquid crystal compositions LCM1 and LCM2
According to the formula
For example, the first tangent slope of the voltage vs. transmittance curve VT1 of the liquid crystal composition LCM1 of the first embodiment of the invention
The value of (A) is 9.84 (%/V), and the first tangent slope of the voltage vs. transmittance curve VT0 of the liquid crystal composition LCM0 of the comparative example
The value of (A) was 12.11 (%/V). When the liquid crystal display of the comparative example was usedWhen the display panel 20 operates at a high frequency (e.g., 240Hz), the common electrode 250 is electrically coupled to the driving lines to generate a potential shift, which causes a voltage applied to the liquid crystal composition LCM0 to deviate from an original set value (i.e., the first voltage V1) to increase or decrease the transmittance of the liquid crystal display panel 20, thereby generating an excessive bright line or a dark line, i.e., generating a display signal crosstalk (H cross talk).
In the first embodiment of the present invention, the first tangent slope of the voltage vs. transmittance curve VT1 of the liquid crystal composition LCM1
Is smaller than the first tangent slope of the voltage-to-transmittance curve VT0 of the liquid crystal composition LCM0 in the comparative example
Therefore, when the common electrode 250 is electrically coupled to the driving line to generate a potential offset, the increase or decrease of the transmittance caused by the potential offset is slightly increased, thereby reducing the visibility of the bright and dark lines generated by the crosstalk (H cross talk) of the display signal.
First tangent slope of voltage vs. transmittance curve VT2 of liquid crystal composition LCM2 of the second embodiment of the invention
The value of (A) is 9.26 (%/V), compared with the first tangent slope of the voltage vs. transmittance curve VT1 of the LCM1 of the first embodiment
The value of 9.84 (%/V) is smaller, and thus the visibility of bright and dark lines generated by crosstalk (hcrosstalk) of the display signal can be further reduced.
In addition, the voltage vs. transmittance curves VT0, VT1, VT2 of each liquid crystal composition LCM0, LCM1, LCM2 have a second tangent slope at a second voltage V2
Wherein Δ VL128Δ T is a difference between a maximum voltage and a minimum voltage in a second voltage range covering a second voltage V2L128The difference between the maximum transmittance and the minimum transmittance of the LCD panel in a second voltage range, such as V2-0.02V to V2+ 0.02V. In the embodiment of the invention, the second tangent slope of the voltage-to-transmittance curves VT1 and VT2 of the liquid crystal compositions LCM1 and LCM2
According to the formula
For example, the slope of the second tangent line of the voltage vs. transmittance curve VT1 of the liquid crystal composition LCM1 of the first embodiment of the invention
The value of (A) is 50.33 (%/V), and the slope of the second tangent line of the voltage vs. transmittance curve VT0 of the liquid crystal composition LCM0 of the comparative example
The value of (A) was 56.14 (%/V). When the liquid crystal display panel 20 of the comparative example operates at a high frequency (e.g., 240Hz), the common electrode 250 is electrically coupled to the driving lines to generate a potential offset, which causes the voltage applied to the liquid crystal composition LCM0 to deviate from the original set value (i.e., the second voltage V2) to increase or decrease the transmittance of the liquid crystal display panel 20, thereby generating an excessive bright line or a dark line, i.e., generating a display signal crosstalk (H cross talk).
In the first embodiment of the present invention, the slope of the second tangent line of the voltage vs. transmittance curve VT1 of the liquid crystal composition LCM1
Is smaller than the second tangent slope of the voltage vs. transmittance curve VT0 of the liquid crystal composition LCM0 in the comparative example
Therefore, when the common electrode 250 is electrically coupled to the driving line to generate a potential offset, the increase or decrease of the transmittance caused by the potential offset is slightly increased, thereby reducing the visibility of the bright and dark lines generated by the crosstalk (H cross talk) of the display signal.
Second tangent slope of voltage vs. transmittance curve VT2 of liquid crystal composition LCM2 of the second embodiment of the invention
The value of (A) is 47.53 (%/V), compared with the second tangent slope of the voltage vs. transmittance curve VT1 of the LCM1 of the first embodiment
The value of (b) is 50.33 (%/V) or less, and thus the visibility of bright and dark lines generated by crosstalk (hcrosstalk) can be further reduced.
In addition, the voltage vs. transmittance curves VT0, VT1, VT2 of the liquid crystal compositions LCM0, LCM1, LCM2 have a third tangential slope at a third voltage V3
Wherein Δ VL192Δ T is a difference between the maximum voltage and the minimum voltage in the third voltage range covering the third voltage V3L192The third voltage range is, for example, V3-0.02V to V3+0.02V, which is the difference between the maximum transmittance and the minimum transmittance of the LCD panel in the third voltage range. In the embodiment of the invention, the third tangent slope of the voltage-to-transmittance curves VT1 and VT2 of the liquid crystal compositions LCM1 and LCM2
According to the formula
For example, the voltage pair transmittance of the liquid crystal composition LCM1 of the first embodiment of the present inventionSlope of the third tangent of the rate curve VT1
The value of (A) is 91.89%/V, and the slope of the third tangent line of the voltage vs. transmittance curve VT0 of the liquid crystal composition LCM0 of the comparative example
The value of (A) was 92.92 (%/V). When the liquid crystal display panel 20 of the comparative example operates at a high frequency (e.g., 240Hz), the common electrode 250 is electrically coupled to the driving lines to generate a potential offset, which causes the voltage applied to the liquid crystal composition LCM0 to deviate from the original set value (i.e., the third voltage V3) to increase or decrease the transmittance of the liquid crystal display panel 20, thereby generating an excessive bright line or a dark line, i.e., generating a display signal crosstalk (H cross talk).
In the first embodiment of the present invention, the slope of the third tangent line of the voltage vs. transmittance curve VT1 of the liquid crystal composition LCM1
Is smaller than the third tangential slope of the voltage vs. transmittance curve VT0 of the liquid crystal composition LCM0 in the comparative example
Therefore, when the common electrode 250 is electrically coupled to the driving line to generate a potential offset, the increase or decrease of the transmittance caused by the potential offset is slightly increased, thereby reducing the visibility of the bright and dark lines generated by the crosstalk (H cross talk) of the display signal.
Third tangential slope of voltage vs. transmittance curve VT2 of liquid crystal composition LCM2 of the second embodiment of the invention
The value of (A) is 91.07 (%/V), compared with the slope of the third tangent line of the voltage vs. transmittance curve VT1 of the LCM1 of the first embodiment
The value 91.89 (%/V) is made smaller, so that the visibility of bright and dark lines generated by crosstalk (hcrosstalk) can be further reduced.
Referring to fig. 7, in the embodiment of the invention, the curves VT1 and VT2 of the voltage versus transmittance of the liquid crystal compositions LCM1 and LCM2 have a gentler linear shape in the range from the first voltage V1 to the second voltage V2, and have a similar linear shape in the range from the second voltage V2 to the third voltage V3, compared with the curve VT0 of the voltage versus transmittance of the liquid crystal composition LCM0 in the comparative example. Therefore, the curves VT1 and VT2 of the voltage vs. transmittance curves of the liquid crystal compositions LCM1 and LCM2 in the embodiments of the present invention have the first tangent slope at the first voltage V1
Third tangent slope to third voltage V3
Is smaller than the first tangent slope of the voltage-to-transmittance curve VT0 of the liquid crystal composition LCM0 in the comparative example at the first voltage V1
Third tangent slope to third voltage V3
The ratio of (a) to (b). For example, the first tangent slope of the voltage vs. transmittance curve VT1 of the liquid crystal composition LCM1 of the first embodiment of the invention
Slope of the third tangent line
Is less than the first tangential slope of the voltage-to-transmittance curve VT0 of the liquid crystal composition LCM0 of the comparative example
Slope of the third tangent line
The ratio of (a) to (b) is 0.13. Therefore, the LCM1 has a good effect of suppressing the bright and dark lines generated by the crosstalk of display signals at a low gray level of 64 gray. In the second embodiment of the present invention, the first tangent slope of the voltage vs. transmittance curve VT2 of the liquid crystal composition LCM2
Slope of the third tangent line
The ratio of (A) to (B) is 0.10, which is better for suppressing bright and dark lines generated by crosstalk of display signals at a lower gray level of 64 gray than the LCM1 of the first embodiment.
In the embodiment of the invention, the curves VT1 and VT2 of the voltage vs. transmittance of the liquid crystal compositions LCM1 and LCM2 at the second tangent slope of the second voltage V2
Third tangent slope to third voltage V3
Is smaller than the second tangent slope of the voltage-to-transmittance curve VT0 of the liquid crystal composition LCM0 in the comparative example at the second voltage V2
Third tangent slope to third voltage V3
The ratio of (a) to (b). For example, the slope of the second tangent line of the voltage vs. transmittance curve VT1 of the liquid crystal composition LCM1 of the first embodiment of the invention
Slope of the third tangent line
Is less than the second tangent slope of the voltage-to-transmittance curve VT0 of the liquid crystal composition LCM0 of the comparative example
Slope of the third tangent line
The ratio of (a) to (b) is 0.60. Therefore, the LCM1 has a good effect of suppressing the bright and dark lines generated by the crosstalk of display signals at the medium and low gray levels of 128 gray. In the second embodiment of the present invention, the slope of the second tangent line of the voltage vs. transmittance curve VT2 of the LCM2 liquid crystal composition
Slope of the third tangent line
The ratio of (A) to (B) is 0.52. compared with the LCM1 of the first embodiment, the low-middle 128 gray scale can generate better suppression effect on the bright and dark lines generated by the display signal crosstalk.
In summary, in the liquid crystal display panel according to the embodiments of the invention, the voltage-to-transmittance curve of the liquid crystal composition has a relatively gentle line shape in the voltage range corresponding to the middle and low gray levels (e.g., gray levels 0 to 192), so that the liquid crystal display panel has a better effect of suppressing the transmittance change caused by the voltage offset due to the crosstalk of the display signals when the liquid crystal display panel operates at the high frame rate, that is, the visibility of the redundant bright and dark lines generated by the crosstalk of the display signals can be reduced.
Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.
Claims (8)
1. A liquid crystal display panel comprising:
a first substrate;
a pixel array disposed on the first substrate;
a first alignment film disposed on the pixel array and having a first alignment direction;
a second substrate disposed opposite to the first substrate;
a common electrode disposed on the second substrate;
a second alignment film disposed on the common electrode and having a second alignment direction, wherein the first alignment direction and the second alignment direction are crossed; and
a liquid crystal composition disposed between the first alignment film and the second alignment film, and having the following properties:
Δ ∈ >0, where Δ ∈ is the dielectric permittivity anisotropy of the liquid crystal composition;
K11/K33less than or equal to 0.9533, wherein K11Is the coefficient of expansion elasticity of the liquid crystal composition, and K33The bending modulus of elasticity of the liquid crystal composition,
wherein the liquid crystal composition has a voltage vs. transmittance curve, a first voltage corresponding to 64 gray scales of the LCD panel, and the curve has a first tangent slope at the first voltage
While
2. The liquid crystal display panel of claim 1, wherein the liquid crystal composition has a voltage versus transmittance curve, a second voltage corresponding to a 128 gray level of the liquid crystal display panel, the curve at the second voltageHas a second tangent slope under the voltage
While
3. The liquid crystal display panel of claim 1, wherein the liquid crystal composition has a voltage versus transmittance curve, a third voltage corresponding to a 192 gray level of the liquid crystal display panel, the curve having a third tangential slope at the third voltage
While
4. The liquid crystal display panel of claim 1, wherein the liquid crystal composition has a voltage versus transmittance curve, a second voltage corresponding to a 128 gray scale level of the liquid crystal display panel, the curve having a second tangent slope at the second voltage
A third voltage corresponding to 192 gray scale of the LCD panel, wherein the curve has a third tangent slope under the third voltage
While
5. The liquid crystal display panel according to claim 1, wherein the liquid crystal composition has a voltage versus transmittance curve, a first voltage corresponding to the liquid crystal display surfaceThe curve has a first tangent slope at the first voltage level of 64 gray scale
A third voltage corresponding to 192 gray scale of the LCD panel, wherein the curve has a third tangent slope under the third voltage
While
6. The liquid crystal display panel of claim 1, wherein K11≤10.2(pN)。
7. The liquid crystal display panel of claim 1, wherein K33≤10.7(pN)。
8. The liquid crystal display panel of claim 1, further comprising:
a color filter layer disposed on the first substrate or the second substrate.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000131721A (en) * | 1998-10-29 | 2000-05-12 | Hitachi Ltd | Liquid crystal display device |
| TW583496B (en) * | 2001-10-24 | 2004-04-11 | Seiko Epson Corp | Liquid crystal device and electronic appliance |
| CN101140749A (en) * | 2007-10-31 | 2008-03-12 | 友达光电股份有限公司 | Driving method of pixel |
| CN101409043A (en) * | 2007-10-09 | 2009-04-15 | 奇美电子股份有限公司 | LCD device and image control method thereof |
| CN102031121A (en) * | 2009-09-29 | 2011-04-27 | 奇美电子股份有限公司 | Liquid crystals composition and liquid crystal display |
| CN103149734A (en) * | 2013-02-19 | 2013-06-12 | 京东方科技集团股份有限公司 | Display device |
| WO2015190711A1 (en) * | 2014-06-10 | 2015-12-17 | 명지대학교 산학협력단 | Liquid crystal alignment layer, liquid crystal display element using same, and method for manufacturing same |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007248699A (en) * | 2006-03-15 | 2007-09-27 | Seiko Epson Corp | Electrooptic device and electronic equipment |
| TWI411664B (en) * | 2009-05-27 | 2013-10-11 | Ind Tech Res Inst | Reflective liquid crystal material formulation and reflective bistable display using the same |
| TWI628265B (en) * | 2014-10-08 | 2018-07-01 | 友達光電股份有限公司 | Liquid crystal display panel and manufacturing method thereof |
| TWI567464B (en) * | 2015-12-01 | 2017-01-21 | 友達光電股份有限公司 | Liquid crystal display panel |
| CN107479265B (en) * | 2016-06-08 | 2020-08-14 | 南京瀚宇彩欣科技有限责任公司 | Display panel |
-
2018
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000131721A (en) * | 1998-10-29 | 2000-05-12 | Hitachi Ltd | Liquid crystal display device |
| TW583496B (en) * | 2001-10-24 | 2004-04-11 | Seiko Epson Corp | Liquid crystal device and electronic appliance |
| CN101409043A (en) * | 2007-10-09 | 2009-04-15 | 奇美电子股份有限公司 | LCD device and image control method thereof |
| CN101140749A (en) * | 2007-10-31 | 2008-03-12 | 友达光电股份有限公司 | Driving method of pixel |
| CN102031121A (en) * | 2009-09-29 | 2011-04-27 | 奇美电子股份有限公司 | Liquid crystals composition and liquid crystal display |
| CN103149734A (en) * | 2013-02-19 | 2013-06-12 | 京东方科技集团股份有限公司 | Display device |
| WO2015190711A1 (en) * | 2014-06-10 | 2015-12-17 | 명지대학교 산학협력단 | Liquid crystal alignment layer, liquid crystal display element using same, and method for manufacturing same |
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