CN112068364B - Liquid crystal display panel - Google Patents
Liquid crystal display panel Download PDFInfo
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- CN112068364B CN112068364B CN202011045144.0A CN202011045144A CN112068364B CN 112068364 B CN112068364 B CN 112068364B CN 202011045144 A CN202011045144 A CN 202011045144A CN 112068364 B CN112068364 B CN 112068364B
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- liquid crystal
- crystal display
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 107
- 239000000758 substrate Substances 0.000 claims abstract description 54
- 230000005684 electric field Effects 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 12
- 238000002834 transmittance Methods 0.000 description 10
- 238000004088 simulation Methods 0.000 description 9
- 239000011159 matrix material Substances 0.000 description 6
- 230000002349 favourable effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 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
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
-
- 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
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
- G02F1/133707—Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Geometry (AREA)
Abstract
The invention provides a liquid crystal display panel, which relates to the field of liquid crystal display panels, and discloses a liquid crystal display panel which uses a negative liquid crystal FFS display technology, wherein a transparent electrode positioned in a sub-pixel opening area is arranged on a color film substrate, and the parallel or latticed transparent electrode is parallel to the initial liquid crystal alignment direction, so that an electric field in the liquid crystal rotation direction can be increased, the tilting of the whole liquid crystal in the initial state is inhibited, the response time of the liquid crystal display panel is accelerated, the dark-state light leakage can be prevented, and the contrast is ensured.
Description
Technical Field
The invention belongs to the field of liquid crystal display panels, and particularly relates to a liquid crystal display panel.
Background
The FFS (fringe field switching) display technology has good viewing angle and chromaticity, and can have good transmittance when using negative liquid crystal, but the negative liquid crystal in the FFS display mode has a long response time due to the influence of the viscosity and electrical parameters of the liquid crystal.
In the prior art, the rotating speed of the liquid crystal can be improved by changing the pattern of the ITO on the color film side, and the response time is prolonged. Patent application publication No. CN107529627A discloses a liquid crystal display device, as shown in fig. 1, a color filter substrate is provided with a transparent ITO electrode 700 having a slit and being connected across the entire surface. However, the experimental simulation of this technique showed that the response time of the liquid crystal display device was 66.07ms and the response speed was slow when the driving voltage was 7V. In the method, the ITO electrodes parallel to the strip electrodes on the array substrate are arranged on the color film to improve the response time, as shown in fig. 2, it can be seen from simulation that the ITO electrodes on the color film substrate and the common electrode generate a transverse electric field, so that liquid crystal rotates, light leakage occurs in a dark state, and the contrast ratio is reduced.
Disclosure of Invention
The invention provides a liquid crystal display panel, and aims to solve the problems that the liquid crystal display panel has longer response time and is easy to generate dark state light leakage under the FFS display technology of negative liquid crystal.
The technical scheme of the invention is as follows:
the invention discloses a liquid crystal display panel, which comprises an array substrate, a color film substrate and a liquid crystal layer, wherein the color film substrate is arranged opposite to the array substrate, the liquid crystal layer is positioned between the array substrate and the color film substrate, the array substrate and the color film substrate are respectively provided with a plurality of pixel areas which are arranged oppositely, and each pixel area comprises a plurality of sub-pixel areas; the array substrate is provided with a common electrode, a pixel electrode and an insulating layer arranged between the common electrode and the pixel electrode, and the pixel electrode comprises a plurality of pixel electrode strips which are positioned in each sub-pixel region and are parallel to each other; and the color film substrate is provided with a transparent electrode positioned in the opening area of the sub-pixel, the transparent electrode comprises a plurality of first transparent electrode strips parallel to the initial liquid crystal alignment direction, and the transparent electrode is connected with a fixed voltage.
Preferably, the transparent electrode further includes a plurality of second transparent electrode bars parallel to the pixel electrode bars.
Preferably, the second transparent electrode stripes are arranged opposite to the pixel electrode stripes.
Preferably, the second transparent electrode strips and the pixel electrode strips are arranged in a staggered manner.
Preferably, the fixed voltage is a low voltage or a ground voltage.
Preferably, the transparent electrode is in continuous conduction in the non-opening area.
Preferably, the liquid crystal layer is a negative liquid crystal.
The invention also discloses a liquid crystal display device which comprises the liquid crystal display panel.
The invention can bring at least one of the following beneficial effects:
the liquid crystal display panel disclosed by the invention uses a negative liquid crystal FFS display technology, and the transparent electrode positioned in the opening area of the sub-pixel is arranged on the color film substrate, and the parallel or latticed transparent electrode is parallel to the initial liquid crystal alignment direction, so that the electric field in the liquid crystal rotation direction can be increased, the whole liquid crystal is inhibited from tilting in the initial state, the response time of the liquid crystal display panel is shortened, meanwhile, the dark-state light leakage can be prevented, and the contrast is ensured.
Drawings
The present invention will be further described in the following detailed description of preferred embodiments, which is to be read in connection with the accompanying drawings.
FIG. 1 is a schematic view of a transparent ITO electrode disclosed in the prior art;
FIG. 2 is a schematic diagram of the dark state results of a prior art test simulation;
FIG. 3 is a schematic view of a liquid crystal display panel according to a first embodiment of the present invention;
FIG. 4 is a diagram illustrating simulation results of response time according to a first embodiment of the present invention;
FIG. 5 is a schematic view of a second embodiment of a liquid crystal display panel according to the present invention;
FIG. 6 is a diagram showing the simulation results of response time according to the second embodiment of the present invention;
FIG. 7 is a schematic diagram of a dark state of a liquid crystal display panel according to an embodiment of the present invention;
FIG. 8 is a schematic view of a third embodiment of a liquid crystal display panel according to the present invention;
fig. 9 is a diagram illustrating a simulation result of response time according to a third embodiment of the present invention.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "a" means not only "only one of this but also a case of" more than one ".
The invention provides a liquid crystal display panel which comprises an array substrate, a color film substrate arranged opposite to the array substrate and a liquid crystal layer positioned between the array substrate and the color film substrate. The invention adopts FFS display technology, and the used liquid crystal layer is negative liquid crystal.
The array substrate and the color film substrate are both provided with a plurality of pixel regions which are oppositely arranged, and each pixel region comprises a plurality of sub-pixel regions; the array substrate is provided with a common electrode, a pixel electrode 10 and an insulating layer arranged between the common electrode and the pixel electrode 10, and the pixel electrode 10 is positioned on one side of the array substrate closest to the liquid crystal layer. As shown in fig. 3, the pixel electrode 10 includes a plurality of pixel electrode stripes 11 located in each sub-pixel 30 region and parallel to each other, the plurality of pixel electrode stripes 11 are connected and conducted at two ends, a transparent electrode 20 is disposed on the color film substrate, and the transparent electrode 20 is located in an opening region 31 of the sub-pixel 30, that is, located in a pixel region opposite to the pixel electrode 10.
The transparent electrode 20 includes a plurality of first transparent electrode stripes 21 parallel to the initial liquid crystal alignment direction AA', and as shown in fig. 5, a plurality of second transparent electrode stripes 22 parallel to the pixel electrode stripes 11, wherein the plurality of first transparent electrode stripes 21 and the plurality of second transparent electrode stripes 22 form a grid-shaped electrode, and the transparent electrode 20 may be made of ITO.
The second transparent electrode stripes 22 may be disposed opposite to the pixel electrode stripes 11, or disposed in a staggered manner with respect to the pixel electrode stripes 11, and at different disposition positions, the vertical electric fields at the edges of the pixel electrode stripes 11 on the array substrate are affected differently.
The transparent electrodes 20 are connected and conducted in the non-opening area, that is, the transparent electrode 20 disposed in the opening area 31 of each sub-pixel 30 can be connected and conducted in the non-opening area, so that only one voltage needs to be applied to drive the transparent electrode 20. Correspondingly, if the transparent electrode 20 only comprises the first transparent electrode strips 21, the first transparent electrode strips 21 which are transversely arranged in parallel are connected and conducted in the area covered by the vertical black matrix, and the area covered by the vertical black matrix is the coverage area of the data line, so that the first transparent electrode strips 21 are connected and conducted in the coverage area of the data line; if the transparent electrode 20 includes the first transparent electrode stripes 21 and the second transparent electrode stripes 22, the first transparent electrode stripes 21 arranged in parallel in the horizontal direction are connected and conducted in the area covered by the vertical black matrix, and the second transparent electrode stripes 22 arranged in parallel with the pixel electrode stripes 11 are connected and conducted in the area covered by the horizontal black matrix, because the area covered by the vertical black matrix is the coverage area of the data lines, and the area covered by the horizontal black matrix is the coverage area of the scan lines, the first transparent electrode stripes 21 are connected and conducted in the coverage area of the data lines, and the second transparent electrode stripes 22 are connected and conducted in the coverage area of the scan lines.
In addition, the transparent electrode 20 is connected to a fixed voltage, and in practical applications, the specific fixed voltage value can be adjusted according to the driving voltage of the array substrate, and may be a low voltage or a ground voltage of 0V.
The technical solution of the present invention is described in detail with specific embodiments below.
The first embodiment is as follows:
fig. 3 is a schematic diagram of a first embodiment of a liquid crystal display panel according to the invention, which simply illustrates a positional relationship between a pixel electrode 10 and a transparent electrode 20, as shown in fig. 3, a plurality of pixel electrode stripes 11 are parallel to each other in a sub-pixel 30 region on an array substrate, a plurality of first transparent electrode stripes 21 are parallel to an initial liquid crystal alignment direction AA' and located in an opening region 31 of the sub-pixel 30 on a color filter substrate, and a negative liquid crystal (not shown) is disposed between the array substrate and the color filter substrate. In the FFS display mode, the initial alignment direction of the negative liquid crystal layer forms an angle smaller than 90 ° with the pixel electrode stripes 11 in the horizontal direction, and the first transparent electrode stripes 21 are parallel to the initial alignment direction AA' of the liquid crystal layer, so that the first transparent electrode stripes 21 also form an angle smaller than 90 ° with the pixel electrode stripes 11 in the horizontal direction.
In the liquid crystal display panel according to the first embodiment, the first transparent electrode stripes 21 parallel to the initial liquid crystal alignment direction AA' are disposed on the color film substrate, and the first transparent electrode stripes 21 are located in the opening regions 31 of the sub-pixels 30, so that the vertical electric field at the edges of the pixel electrode stripes 11 on the array substrate can be increased, the liquid crystal is prevented from tilting, and the liquid crystal is favorable for the power-up in-plane rotation of the liquid crystal. And the first transparent electrode strips 21 are arranged in parallel with the initial liquid crystal alignment direction AA', so that the electric field in the liquid crystal rotation direction can be increased, and under the condition that the liquid crystal is negative liquid crystal, the electric field is favorable for restoring the initial state of the liquid crystal after the liquid crystal is de-electrified.
Fig. 4 is a diagram showing a response time simulation result of the first embodiment of the present invention, which is a response time chart of the liquid crystal display panel under the driving voltage of 7V. Wherein, the response time RT of the lcd panel of the first embodiment is 39.89ms, and the transmittance T is 0.11363, which significantly improves the response time and transmittance compared with the prior art mentioned in the background art.
Example two:
fig. 5 is a schematic diagram of a second embodiment of a liquid crystal display panel according to the invention, as shown in fig. 5, a plurality of pixel electrode stripes 11 parallel to each other are disposed in a sub-pixel 30 region on an array substrate, a plurality of first transparent electrode stripes 21 parallel to an initial liquid crystal alignment direction AA' and a plurality of second transparent electrode stripes 22 parallel to the pixel electrode stripes 11 and disposed opposite to the pixel electrode stripes 11 are disposed in an opening region 31 of the sub-pixel 30 on a color film substrate, the plurality of first transparent electrode stripes 21 and the plurality of second transparent electrode stripes 22 form a grid electrode, and a negative liquid crystal (not shown) is disposed between the array substrate and the color film substrate. In the FFS display mode, the initial alignment direction of the negative liquid crystal layer forms an angle smaller than 90 ° with the pixel electrode stripes 11 in the horizontal direction, the first transparent electrode stripes 21 are parallel to the initial alignment direction AA' of the liquid crystal layer, so the first transparent electrode stripes 21 also form an angle smaller than 90 ° with the pixel electrode stripes 11 in the horizontal direction, and the second transparent electrode stripes 22 are disposed opposite to the pixel electrode stripes 11, so the second transparent electrode stripes 22 are overlapped with the pixel electrode stripes in the horizontal direction.
In the liquid crystal display panel of the second embodiment, in addition to the first transparent electrode stripes 21 parallel to the initial liquid crystal alignment direction AA' and the second transparent electrode stripes 22 parallel to and opposite to the pixel electrode stripes 11, which are disposed on the color film substrate, the second transparent electrode stripes 22 are disposed opposite to the pixel electrode stripes 11, so that the vertical electric field above the pixel electrode stripes 11 can be increased, the liquid crystal is prevented from tilting while the liquid crystal is ensured to rotate, and the transmittance is improved.
Fig. 6 is a diagram showing the simulation result of the response time of the second embodiment of the present invention, which is a response time chart of the liquid crystal display panel under the driving voltage of 7V. Wherein, the response time RT of the liquid crystal display panel of the second embodiment is 43.05ms, and the transmittance T is 0.117168, compared with the prior art mentioned in the background art, the response time and the transmittance are both significantly improved.
Fig. 7 is a schematic diagram of a dark state of a liquid crystal display panel according to an embodiment of the invention, and compared with the technical solution mentioned in the background art, in an initial state, in this embodiment, since the color film substrate is provided with the first transparent electrode stripes 21 and the second transparent electrode stripes 22, liquid crystals located below the latticed transparent electrodes 20 do not rotate, and can suppress rotation of other liquid crystals in the opening regions 31, light leakage in a dark state is less, and a contrast ratio is ensured.
Example three:
fig. 8 is a schematic diagram of a third embodiment of a liquid crystal display panel according to the invention, as shown in fig. 8, a plurality of pixel electrode stripes 11 parallel to each other are disposed in a sub-pixel 30 region on an array substrate, a plurality of first transparent electrode stripes 21 parallel to an initial liquid crystal alignment direction AA' and a plurality of second transparent electrode stripes 22 parallel to the pixel electrode stripes 11 and staggered from the pixel electrode stripes 11 are disposed in an opening region 31 of the sub-pixel 30 on a color film substrate, the plurality of first transparent electrode stripes 21 and the plurality of second transparent electrode stripes 22 form a grid electrode, and a negative liquid crystal (not shown) is disposed between the array substrate and the color film substrate. In the FFS display mode, the initial alignment direction of the negative liquid crystal layer forms an angle smaller than 90 ° with the pixel electrode stripes 11 in the horizontal direction, the first transparent electrode stripes 21 are parallel to the initial alignment direction AA' of the liquid crystal layer, so the first transparent electrode stripes 21 also form an angle smaller than 90 ° with the pixel electrode stripes 11 in the horizontal direction, and the second transparent electrode stripes 22 are disposed in a staggered manner with the pixel electrode stripes 11, so the second transparent electrode stripes 22 do not overlap with the pixel electrode stripes 11 in the horizontal direction.
In the liquid crystal display panel of the third embodiment, in addition to the first transparent electrode stripes 21 parallel to the initial liquid crystal alignment direction AA' and the second transparent electrode stripes 22 parallel to and dislocated from the pixel electrode stripes 11 being disposed on the color filter substrate, the second transparent electrode stripes 22 are parallel to and dislocated from the pixel electrode stripes 11, so that a vertical electric field around the upper side of the pixel electrode stripes 11 can be increased, the rotation of the liquid crystal is ensured, the tilting of the whole liquid crystal in the initial state is suppressed, and the transmittance is improved; meanwhile, the second transparent electrode strips 22 can also ensure that the contrast and dark state light leakage are less.
Fig. 9 is a diagram showing the simulation result of the response time of the third embodiment of the present invention, which is a response time chart of the liquid crystal display panel under the driving voltage of 7V. Wherein, the response time RT of the liquid crystal display panel of the third embodiment is 41.87ms, and the transmittance T is 0.117066, compared with the prior art mentioned in the background art, the response time and the transmittance are both significantly improved.
The invention also discloses a liquid crystal display device which comprises the liquid crystal display panel.
The liquid crystal display panel disclosed by the invention uses a negative liquid crystal FFS display technology, and the transparent electrode positioned in the opening area of the sub-pixel is arranged on the color film substrate, so that the parallel or latticed transparent electrode can accelerate the response time of negative FFS liquid crystal display, and simultaneously, the contrast and the transmittance of the whole display device are ensured.
It should be noted that the above mentioned embodiments are only preferred embodiments of the present invention, but the present invention is not limited to the details of the above embodiments, and it should be noted that, for those skilled in the art, it is possible to make various modifications and amendments within the technical concept of the present invention without departing from the principle of the present invention, and various modifications, amendments and equivalents of the technical solution of the present invention should be regarded as the protection scope of the present invention.
Claims (8)
1. A liquid crystal display panel comprises an array substrate, a color film substrate arranged opposite to the array substrate and a liquid crystal layer positioned between the array substrate and the color film substrate, wherein the array substrate and the color film substrate are respectively provided with a plurality of pixel regions arranged oppositely, and each pixel region comprises a plurality of sub-pixel regions; the array substrate is provided with a common electrode, a pixel electrode and an insulating layer arranged between the common electrode and the pixel electrode, and the pixel electrode comprises a plurality of pixel electrode strips which are positioned in each sub-pixel region and are parallel to each other; the liquid crystal display panel is characterized in that a transparent electrode positioned in the opening area of the sub-pixel is arranged on the color film substrate, the transparent electrode comprises a plurality of first transparent electrode strips parallel to the initial liquid crystal alignment direction, and the transparent electrode is connected with a fixed voltage.
2. The liquid crystal display panel of claim 1, wherein the transparent electrode further comprises a plurality of second transparent electrode stripes parallel to the pixel electrode stripes.
3. The liquid crystal display panel according to claim 2, wherein the second transparent electrode stripes are disposed opposite to the pixel electrode stripes.
4. The liquid crystal display panel according to claim 2, wherein the second transparent electrode stripes are arranged to be offset from the pixel electrode stripes.
5. The liquid crystal display panel according to any of claims 1 to 4, wherein the fixed voltage is a low voltage or a ground voltage.
6. The liquid crystal display panel according to any of claims 1 to 4, wherein the transparent electrodes are connected and conducted in the non-opening region.
7. The liquid crystal display panel according to any of claims 1 to 4, wherein the liquid crystal layer is a negative liquid crystal.
8. A liquid crystal display device comprising the liquid crystal display panel according to any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011045144.0A CN112068364B (en) | 2020-09-29 | 2020-09-29 | Liquid crystal display panel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011045144.0A CN112068364B (en) | 2020-09-29 | 2020-09-29 | Liquid crystal display panel |
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| CN112068364A CN112068364A (en) | 2020-12-11 |
| CN112068364B true CN112068364B (en) | 2022-06-17 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102629056A (en) * | 2011-11-15 | 2012-08-08 | 京东方科技集团股份有限公司 | Thin film transistor (TFT) array substrate and display device |
| CN103941488A (en) * | 2013-11-01 | 2014-07-23 | 上海中航光电子有限公司 | Fringe-field-switching-type liquid crystal display device, array substrate and manufacturing method of array substrate |
| CN110543051A (en) * | 2018-05-28 | 2019-12-06 | 天马日本株式会社 | Liquid crystal display device |
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2020
- 2020-09-29 CN CN202011045144.0A patent/CN112068364B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102629056A (en) * | 2011-11-15 | 2012-08-08 | 京东方科技集团股份有限公司 | Thin film transistor (TFT) array substrate and display device |
| CN103941488A (en) * | 2013-11-01 | 2014-07-23 | 上海中航光电子有限公司 | Fringe-field-switching-type liquid crystal display device, array substrate and manufacturing method of array substrate |
| CN110543051A (en) * | 2018-05-28 | 2019-12-06 | 天马日本株式会社 | Liquid crystal display device |
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