CN115598889A - Liquid crystal display panel, liquid crystal display device and manufacturing method - Google Patents
Liquid crystal display panel, liquid crystal display device and manufacturing method Download PDFInfo
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- CN115598889A CN115598889A CN202210905691.4A CN202210905691A CN115598889A CN 115598889 A CN115598889 A CN 115598889A CN 202210905691 A CN202210905691 A CN 202210905691A CN 115598889 A CN115598889 A CN 115598889A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 239000000758 substrate Substances 0.000 claims abstract description 158
- 239000002184 metal Substances 0.000 claims description 43
- 238000000034 method Methods 0.000 claims description 22
- 239000010409 thin film Substances 0.000 claims description 20
- 239000012780 transparent material Substances 0.000 claims description 3
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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
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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
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136209—Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element
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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
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136286—Wiring, e.g. gate line, drain line
Abstract
The embodiment of the invention discloses a liquid crystal display panel, a liquid crystal display device and a manufacturing method. The liquid crystal display panel of one embodiment includes: the liquid crystal display panel comprises a first substrate, a second substrate arranged opposite to the first substrate, and a liquid crystal layer positioned between the first substrate and the second substrate, wherein the first substrate comprises: a first substrate; the first electrodes are arranged on one side, close to the second substrate, of the first substrate and arrayed in a first direction and a second direction perpendicular to the first direction, the first electrodes comprise a plurality of first sub-electrodes arranged in parallel and a plurality of second sub-electrodes arranged in parallel, and projections of the first sub-electrodes and the second sub-electrodes on the first substrate are intersected; the first substrate further comprises a shielding layer, and the projection of the shielding layer on the first substrate covers the positions of the first electrode and the second electrode which are intersected.
Description
Technical Field
The invention relates to the technical field of display. And more particularly, to a liquid crystal display panel, a liquid crystal display device, and a method of fabricating the same.
Background
In the related art, in the structural design of the liquid crystal display panel, the electrode is designed to be a dual-domain structure to increase the viewing angle range of the liquid crystal display panel, however, as shown in fig. 1, the liquid crystal display panel under the structure may have poor light leakage in the L255 frame and the L0 frame, which is specifically represented as follows: when the display panel displays an L255 picture, a black line which does not emit light is generated at the intersection of the domains; when the display panel displays an L0 picture, the display panel may have poor light leakage at the domain and the intersection of the domains.
Disclosure of Invention
The present invention is directed to a liquid crystal display panel, a liquid crystal display device and a method for manufacturing the same, which solve at least one of the problems of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a first aspect of the present invention provides a liquid crystal display panel, comprising: a first substrate, a second substrate disposed opposite to the first substrate, and a liquid crystal layer between the first substrate and the second substrate,
the first substrate includes:
a first substrate;
first electrodes disposed on a side of the first substrate close to the second substrate, the first electrodes being arranged in an array in a first direction and a second direction perpendicular to the first direction, wherein,
the first electrode comprises a plurality of first sub-electrodes arranged in parallel and a plurality of second sub-electrodes arranged in parallel, and the first sub-electrodes and the second sub-electrodes are arranged in a crossed manner on the projection of the first sub-electrodes on the first substrate;
the first substrate further comprises a shielding layer arranged on one side surface of the first substrate close to the second substrate, and the projection of the shielding layer on the first substrate covers the positions of the first electrode and the second electrode which are intersected.
Further, the first electrode further includes a third sub-electrode located at an intersection of the first sub-electrode and the second sub-electrode and extending along the first direction, the third sub-electrode connects the adjacent first sub-electrodes and connects the adjacent second sub-electrodes, and a projection of the third sub-electrode on the first substrate covers the intersection of the first electrode and the second electrode.
Furthermore, a plurality of hollow-out areas arranged along the first direction are formed by the projections of the adjacent first sub-electrodes and the adjacent second sub-electrodes on the first substrate;
and splitting the hollowed-out area into two sub hollowed-out areas by the projection of the third sub-electrode on the first substrate.
Further, the third sub-electrode and the second sub-electrode or the first sub-electrode are arranged in the same layer,
the third sub-electrode, the second sub-electrode or the first sub-electrode are made of transparent materials.
Further, the first sub-electrode and the second sub-electrode are symmetrically disposed with respect to an axis parallel to the first direction,
the first sub-electrode comprises a first compensation domain area close to one side of a symmetry axis and a first main domain area far away from one side of the symmetry axis, the projection area of the first main domain area is larger than that of the first compensation domain area,
the second sub-electrode includes a second compensation domain near one side of the symmetry axis and a second main domain far from the other side of the symmetry axis, a projected area of the first main domain is larger than a projected area of the first compensation domain,
the first compensation domains and the second compensation domains intersect to form a first protrusion structure.
Furthermore, a first included angle with a protrusion is formed between an extension line of the first main domain area to a side close to the first direction and an extension line of the second main domain area to a side close to the first direction,
the protruding direction of the first protruding structure is opposite to the protruding direction of the first included angle.
Further, the first substrate further includes:
the second electrode is positioned on one side of the first substrate close to the second substrate;
the thin film driving transistor comprises an active layer, a grid metal layer, a source drain electrode layer connected with the active layer, a first insulating layer positioned between the active layer and the grid metal layer, and a second insulating layer covering the source drain electrode layer; and
and a third insulating layer between the second electrode and the thin film driving transistor.
Furthermore, the shielding layer is a metal layer and is arranged on the same layer as the gate metal layer or the source/drain electrode layer.
Further, the shielding layer is an insulating layer, and is disposed on the same layer as the first insulating layer, or on the same layer as the second insulating layer, or on the same layer as the third insulating layer.
Further, the first substrate further includes:
the grid line is connected with the grid metal layer, extends along the first direction and is arranged along the second direction;
the data line is connected with the source drain metal layer, extends along the second direction and is arranged along the first direction; and
the grid line and the data line are insulated from each other and crossed to define a sub-pixel area of the first substrate,
wherein the active layer is located at a projection of the data line on the first substrate,
the thickness of the third insulating layer at the position of the data line is greater than the thickness of the third insulating layer at the sub-pixel regions on both sides of the data line.
A second aspect of the invention provides a liquid crystal display device comprising the liquid crystal display panel of the first aspect of the invention.
A third aspect of the present invention provides a method of manufacturing the liquid crystal display panel of the first aspect of the present invention, the method comprising:
forming the first substrate;
forming the second substrate;
forming a liquid crystal layer between the first substrate and the second substrate,
the first substrate and the second substrate are sealed with each other,
wherein forming the first substrate includes:
forming first electrodes on the first substrate, wherein the first electrodes are arrayed in a first direction and a second direction perpendicular to the first direction, the first electrodes comprise a plurality of first sub-electrodes arranged in parallel and a plurality of second sub-electrodes arranged in parallel, and the first sub-electrodes and the second sub-electrodes are arranged in a crossed manner on the projection of the first sub-electrodes on the first substrate;
and forming a shielding layer on the first substrate, wherein the projection of the shielding layer on the first substrate covers the position of the first electrode and the second electrode which are intersected.
The invention has the following beneficial effects:
according to the technical scheme, the shielding layer is arranged at the position, corresponding to the junction of the first sub-electrode and the second sub-electrode, on the first substrate, and through the arrangement, when the light source arranged on one side, far away from the liquid crystal layer, of the first substrate emits light, the shielding layer can shield the junction of the first sub-electrode and the second sub-electrode, so that the light leakage problem caused by liquid crystal disorder at the domain junction is solved, the bad phenomena of black lines when an L255 picture is displayed and light leakage when an L0 picture is displayed on the liquid crystal display panel are solved, and the liquid crystal display panel has a wide application prospect.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 illustrates a display dark line abnormality under a L255 screen of a related art liquid crystal display panel;
FIG. 2 is a schematic diagram of a liquid crystal display panel according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a liquid crystal display panel according to an embodiment of the present invention;
FIG. 4 is a schematic view showing a projection structure of a liquid crystal display panel on a first substrate according to an embodiment of the present invention;
FIGS. 5a and 5b are schematic views showing the structure of various embodiments of the present invention provided with a shielding layer;
FIG. 6 is a schematic view of a liquid crystal display panel according to another embodiment of the present invention;
FIG. 7 is a schematic view showing the structure of a first electrode according to another embodiment of the present invention;
FIGS. 8a and 8b are schematic views showing the structure of a first electrode according to another embodiment of the present invention;
FIG. 9 is a schematic view showing the structure of the AA cross-section shown in FIG. 3 of the liquid crystal display panel according to the embodiment of the present invention;
fig. 10 is a schematic structural view of the liquid crystal display panel of the embodiment of the present invention, shown in the BB section of fig. 3.
Detailed Description
In order to more clearly illustrate the present invention, the present invention is further described below with reference to the following examples and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It will be appreciated by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not intended to limit the scope of the invention.
Based on the above problems, the inventors of the present invention have made extensive studies and experiments to propose that the reason for the occurrence of the above-mentioned abnormality in the liquid crystal display panel in the dual-domain design is related to the dual-domain design, in which the electric field of the electrodes at the boundary is disturbed, and the liquid crystal layer at the position cannot be accurately driven by deflection, so that the light leakage problem occurs in the liquid crystal display panel, which is represented by the display abnormality of the black line when displaying the L255 picture and the light leakage when displaying the L0 picture.
Further, since a black line appears in the white screen of L255, the display luminance of the liquid crystal display panel becomes low, and since the black screen of L0 causes light leakage, the display luminance of the liquid crystal display panel becomes high, the contrast CR (L255/L0) of the liquid crystal display panel is greatly lowered, and it is desirable that the contrast CR is 2500 exemplarily, but the product contrast of an actual product is 1650, and the visible contrast is low.
In view of the above, the present invention provides a liquid crystal display panel, a liquid crystal display device and a manufacturing method thereof to solve the above problems.
As shown in fig. 2 and 3, a first embodiment of the present invention provides a liquid crystal display panel including: a first substrate 10, a second substrate 20 disposed opposite to the first substrate 10, and a liquid crystal layer 30 between the first substrate 10 and the second substrate 20,
the first substrate 10 includes:
a first substrate 11;
the first electrode 12 comprises a plurality of first sub-electrodes 121 arranged in parallel and a plurality of second sub-electrodes 122 arranged in parallel, and the first sub-electrodes 121 and the second sub-electrodes 122 intersect in projection on the first substrate 11;
the first substrate 10 further includes a shielding layer 13 disposed on a side surface of the first substrate 11 close to the second substrate 20, and a projection of the shielding layer 13 on the first substrate 11 covers the intersecting positions of the first electrode 12 and the second electrode.
In an embodiment of the present invention, as shown in fig. 2, the first substrate 10 may be, for example, an array substrate, and includes a first substrate 11 and driving electrodes, such as a first electrode 12 and a second electrode, formed on the first substrate 11, and generate a driving electric field under the action of a driving signal to act on the liquid crystal layer 30, the second substrate 20 may be, for example, a color filter substrate, and liquid crystal molecules in the liquid crystal layer 30 undergo a state change under the action of the driving electric field to prevent or allow light to pass through a color filter layer located above the liquid crystal layer 30, so as to present different colors and grays, thereby implementing image display. Of course, the embodiment of the present invention is not limited in comparison, and the color filter layer may be located on the first substrate 10, or the liquid crystal display panel may not be provided with a color filter layer, and only displays black and white images.
As shown in fig. 2, the electrode on the first substrate 10 can form an electric field after being conductive, and the liquid crystal layer 30 located between the first substrate 10 and the second substrate 20 deflects under the electric field, in this embodiment, the shielding layer 13 is disposed on the first substrate 10 at a position corresponding to a boundary between the first sub-electrode 121 and the second sub-electrode 122, and through this arrangement, when the first substrate 11 emits light from a light source located on a side away from the liquid crystal layer 30, the shielding layer 13 can shield the boundary between the first sub-electrode 121 and the second sub-electrode 122, so as to solve a light leakage problem caused by liquid crystal disorder at the domain boundary, that is, solve a black line when the liquid crystal display panel displays an L255 picture and a poor light leakage phenomenon when the liquid crystal display panel displays an L0 picture.
In addition, in the liquid crystal display panel of the present embodiment, in addition to solving the black line defect as described above, the contrast ratio can be further improved, and since the contrast ratio CR is inversely proportional to the luminance of the white screen, when the black line defect under the white screen is solved by the shielding layer 13, the luminance under the white screen of L255 is improved, and the contrast ratio is effectively improved.
In an alternative embodiment, as shown in fig. 3, 4, 9 and 10, the first substrate 10 further includes:
a second electrode 14 located on a side of the first substrate 11 close to the second substrate 20;
and a thin film driving transistor 15 located on a side of the second electrode 14 away from the first substrate 11.
In an alternative embodiment, as shown in fig. 5a and 5b, the thin film transistor 15 includes an active layer 151, a gate metal layer 153, a source drain electrode layer 155 connected to the active layer 151, a first insulating layer 152 between the active layer 151 and the gate metal layer 153, and a second insulating layer 156 covering the source drain electrode layer.
For example, as shown in fig. 3, fig. 4, fig. 9 and fig. 10, the first substrate 10 is taken as an array substrate in the present embodiment for description: the first substrate 10 is an array substrate, and includes a first substrate 11 and a second electrode 14 formed on the first substrate 11. In one specific example, the first electrode 12 may be a pixel electrode and the second electrode 14 may be a common electrode. In another specific example, the first electrode 12 may be a common electrode, and the second electrode 14 may be a pixel electrode, which is not limited in this embodiment of the present invention.
As shown in fig. 4, the first substrate 10 further includes a Gate line 16 (Gate line) connected to the Gate metal layer 153 and a Data line 17 (Data line) connected to one of the source or drain electrodes of the source-drain metal layer 155, the Data line 17 being sequentially disposed on the first substrate 11, wherein the Gate line 16 extends along the first direction D1 and is arranged along the second direction D2, the Data line 17 extends along the second direction D2 and is arranged along the first direction D1, and the Gate line 16 and the Data line 17 are arranged to cross each other in an insulated manner to define a plurality of sub-pixels.
In the present embodiment, the first direction D1 and the second direction D2 are, for example, a row direction and a column direction, respectively, the plurality of sub-pixels includes a plurality of rows and a plurality of columns of sub-pixels, the same data line 17 is connected to the sub-pixels located in the same column, the same gate line 16 is connected to the sub-pixels located in the same row, each sub-pixel has a pixel electrode and at least one driving thin film transistor 15, the gate metal layer 153 of the thin film transistor 15 is connected to a corresponding gate line 16, the source of the thin film transistor 15 is connected to a corresponding data line 17, and the drain of the thin film transistor 15 is connected to a corresponding electrode, in the present embodiment, the second electrode 14 is connected to the drain, and the first electrode 12 is connected to the gate. Illustratively, the first electrode 12 of the present embodiment is disposed in a pixel region defined by the gate line 16 and the data line 17, and the second electrode 14 is laid over the entire surface. It should be noted that the present embodiment does not limit the tft to be in a top-gate structure or a bottom-gate structure.
In a specific example, as shown in fig. 5a, when the thin film driving transistor is a top gate structure, the structure of the thin film driving transistor is:
the active layer 151 is located on a first substrate, the first insulating layer 152 is arranged on the active layer 151, the gate metal layer 153 is arranged on the first insulating layer 152, the fourth insulating layer 154 covers the gate metal layer 153, the source and drain electrode layer 155 is arranged on one side, far away from the first substrate 11, of the fourth insulating layer 154 and is connected with the active layer 151, and the second insulating layer 156 is formed on the source and drain electrode layer 155.
Therefore, for the top-gate structure, the shielding layer 13 of the present embodiment may be disposed on the same layer as the fourth insulating layer 154, the gate metal layer 153, the first insulating layer 152, the source-drain metal layer 155, and the second insulating layer 156. For example, as shown in fig. 5a, the shielding layer 13 is disposed in the same layer as the gate metal layer 153.
In another specific example, as shown in fig. 5b, when the thin film driving transistor is a bottom gate structure, the structure of the first substrate includes: a second electrode 14 disposed on the first substrate 11,
the structure of the thin film driving transistor is as follows:
a gate metal layer 153 connected to the second electrode 14;
a first insulating layer 152 covering the gate metal layer 153;
an active layer 151 on the first insulating layer 152, the insulation being achieved by the first insulating layer 152 between the active layer 151 and the gate metal layer 153;
a source-drain metal layer 155 on the active layer 151 and connected to the active layer 151,
a second insulating layer 156 covering the source drain metal layer.
In this embodiment, the first electrode is insulated from the thin film driving transistor 15 by the third insulating layer 157. Illustratively, the second insulating layer 156 is an inorganic insulating layer, and the third insulating layer 157 is an organic insulating layer.
Therefore, for the bottom gate structure, the shielding layer 13 of the present embodiment may be disposed in the same layer as the gate metal layer 153, the first insulating layer 152, the source-drain metal layer 155, the second insulating layer 156, and the third insulating layer 157. For example, as shown in fig. 5b, the shielding layer 13 is disposed in the same layer as the gate metal layer 153.
In an alternative embodiment, the shielding layer 13 is a metal layer, and is disposed on the same layer as the gate metal layer 153 or the source/drain electrode layer 155. For example, as shown in fig. 5a and 5b, the shielding layer 13 of the present embodiment is disposed on the same layer as the gate metal layer 153, that is, the gate metal layer 153 and the shielding layer 13 of the present embodiment can be formed at the same time in the same process step, so as to avoid adding process steps on the basis of solving the abnormal dark line of the white image, and play a role in saving process flow.
In another specific example, the shielding layer 13 according to the embodiment of the present invention can also be disposed in the same layer as the other opaque metal layer of the thin film transistor 15, that is, the source/drain electrode layer 155, and the light shielding can be formed by utilizing the opaque property of the metal layer of the thin film transistor 15.
In this embodiment, although the shielding layer 13 is a metal layer, it is not connected to a signal, that is, the shielding layer 13 in this embodiment is in a floating (floating) state. Since the first electrode 12 and the second electrode 14 of the present embodiment are transparent electrodes to improve the display transmittance, the present embodiment selects a metal layer that does not transmit light as the shielding layer 13.
Based on the design concept, the shielding layer 13 of the present embodiment can also be an opaque insulating layer, in an optional embodiment, the shielding layer 13 is an insulating layer, and is disposed on the same layer as the first insulating layer 152, or on the same layer as the fourth insulating layer 154, or on the same layer as the second insulating layer 156, and by further disposing, the problem of the abnormal dark line of the white picture can be solved, and the process steps are not increased.
Based on the above embodiments, whether the thin film transistor is the top gate structure shown in fig. 5a or the thin film driving transistor is the bottom gate structure shown in fig. 5b, when the shielding layer of the above embodiments is fabricated, the shielding layer without floating of the external signal of the present embodiment can be formed by the same process when the metal layer or the insulating layer of the thin film driving transistor is fabricated.
Further, on the basis of the original film layer of the liquid crystal display panel and the shielding layer 13 of this embodiment formed by the same process in the foregoing embodiment, in an optional embodiment, the shielding layer 13 of this embodiment is continuously designed in the first direction D1, and a projection of the shielding layer 13 on the first substrate 11 overlaps with the data lines 17 extending along the second direction D2 and arranged along the first direction D1. That is to say, as shown in fig. 6, the shielding layer 13 of the present embodiment is not designed continuously in the same sub-pixel region, but penetrates through the plurality of sub-pixels arranged in the first direction D1, and the shielding layers 13 independently distributed in situ in different sub-pixels are designed as a whole strip shape.
It should be noted that the solution of the continuous design of the shielding layer shown in fig. 6 in this embodiment is only an exemplary illustration, as shown in fig. 6, when the shielding layer is disposed on the same layer as the metal layer or the insulating layer located above the data line, the projection relationship of the shielding layer is represented as the projection of the data line covered as shown in fig. 6, and when one shielding layer is disposed on the same layer as the metal layer or the insulating layer located below the data line, the projection of the shielding layer is represented as being shielded, and is not described herein again. In a specific example, the projection length of the shielding layer 13 and the third sub-electrode in the second direction D2 is 4 to 6 μm, which can solve the display defect and ensure the display performance.
In consideration of the electric field disturbance at the boundary position between the first sub-electrode 121 and the second sub-electrode 122, the embodiment of the invention can improve the black line in the L255 white screen and the light leakage in the L0 black screen by increasing the electric field at the boundary position to reduce the degree of electric field disturbance at the boundary position.
In an alternative embodiment, as shown in fig. 6, the first electrode 12 further includes a third sub-electrode 123 extending along the first direction D1, the third sub-electrode 123 connects the adjacent first sub-electrodes 121 and connects the adjacent second sub-electrodes 122, and a projection of the third sub-electrode 123 on the first substrate 11 covers the liquid crystal layer 30 at the position of the intersecting first sub-electrode 121 and second sub-electrode 122. In a specific example, the projection length of the third sub-electrode 123 in the second direction D2 in the present embodiment is 4 to 6 μm, which can solve the display defect and ensure the display performance.
Fig. 6 shows a schematic projection diagram of the first electrode 12 in one sub-pixel onto the first substrate 11, the first sub-electrode 121 is disposed at an angle α 1 inclined from the first direction D1, and the second sub-electrode 122 is disposed at an angle α 2 inclined from the first direction D1. Illustratively, the first sub-electrode 121 and the second sub-electrode 122 are symmetrically disposed about an axis parallel to the first direction D1, thereby forming a dual-domain structure, which can provide a wider viewing angle than the single-domain technology, and meet display quality requirements.
In the present embodiment, the third sub-electrode 123 is disposed at the boundary position between the first sub-electrode 121 and the second sub-electrode 122, the first sub-electrode 121 and the second sub-electrode 122 at the boundary position are connected by the third sub-electrode 123, so that the projection of the third sub-electrode 123 on the first substrate 11 covers the liquid crystal layer 30 at the position of the first electrode 12 and the second electrode 14, which intersect with each other, and the third sub-electrode 123 shields the turbulent electric field at the position.
Furthermore, the first electrode 12 of one sub-pixel includes a plurality of first sub-electrodes 121 arranged in parallel and second sub-electrodes 122 arranged in parallel and intersecting with each of the first sub-electrodes 121, so that the third sub-electrode 123 is arranged to extend along the first direction D1 in this embodiment, so as to form an ordered electric field at each boundary position, and shield the disordered electric field at the boundary position, thereby reducing the disorder degree of the liquid crystal layer 30, and through this arrangement, the black line under the L255 white image and the poor light leakage under the L0 black image can be effectively improved, and the effect of improving the contrast is further achieved.
In an alternative embodiment, projections of the adjacent first sub-electrodes 121 and the adjacent second sub-electrodes 122 on the first substrate 11 form a plurality of hollow areas 124 arranged along the first direction D1; the projection of the third sub-electrode 123 on the first substrate 11 splits the hollow area 124 into two sub-hollow areas.
As shown in fig. 6, the first sub-electrode 121 and the second sub-electrode 122 form a slit by means of a slit, the projection of the adjacent first electrode 12 on the first substrate 11 forms a hollow area 124, and the projection penetrating all the hollow areas 124 is formed on the first substrate 11 by the third sub-electrode 123 of the first sub-electrode 121 and the second sub-electrode 122 at the connection intersection position of the present embodiment, so that the whole black line of the L255 white picture can be defective.
In an alternative embodiment, the third sub-electrode 123 and the second sub-electrode 122 or both the third sub-electrode 123 and the first sub-electrode 121 are disposed in the same layer, that is, the third sub-electrode 123 is formed at the same time as the first sub-electrode 121 and the second sub-electrode 122 are formed in the same process, thereby saving process steps.
Further, regardless of the complexity of the process steps, the third sub-electrode 123 may be disposed on a different layer from the first sub-electrode 121 or the second sub-electrode 122, and connected to the first sub-electrode 121 and the second sub-electrode 122 through via holes, respectively. That is to say, in the present embodiment, the third sub-electrode 123 is disposed at the intersection position of the first sub-electrode 121 and the second sub-electrode 122, and the third sub-electrode 123 connects the first sub-electrode 121 and the second sub-electrode 122 as a design rule, any scheme capable of shielding the turbulent electric field at the intersection position is within the protection scope of the embodiment of the present invention.
In this embodiment, the third sub-electrode 123, the second sub-electrode 122, or the first sub-electrode 121 are made of a transparent material to ensure the transmittance of the liquid crystal display panel.
Based on the above embodiments, the liquid crystal display panel according to the embodiments of the present invention solves the problem of light leakage caused by liquid crystal disturbance at the domain boundary, and improves the bad phenomena of black lines when the liquid crystal display panel displays an L255 picture and light leakage when the liquid crystal display panel displays an L0 picture.
In an alternative embodiment, as shown in fig. 8a and 8b, the first sub-electrode 121 and the second sub-electrode 122 are symmetrically disposed with an axis parallel to the first direction D1,
the first sub-electrode 121 includes a first compensation domain 1211 on a side close to a symmetry axis and a first main body domain 1212 on a side far from the symmetry axis, a projected area of the first main body domain 1212 is larger than a projected area of the first compensation domain 1211,
the second sub-electrode 122 includes a second compensation domain 1221 near one side of a symmetry axis and a second main domain 1222 far from both sides of the symmetry axis, a projected area of the second main domain 1222 is larger than a projected area of the second compensation domain 1221,
the intersection of the first and second compensation domains 1211 and 1221 forms a protrusion structure, such as a horn-shaped protrusion or an arc-shaped protrusion.
In the embodiment of the invention, the first electrode 12 is arranged such that the first sub-electrode 121 and the second sub-electrode 122 are symmetrically formed into a double-domain structure, thereby enlarging the viewing angle of the viewing area. As shown in fig. 1, a black dark line is formed at the intersection of the first sub-electrode 121 and the second sub-electrode 122 under a white image, and the present embodiment further designs the first electrode 12 of each pixel, designs the structure of the first sub-electrode 121 at the intersection of the first sub-electrode 121 and the second sub-electrode 122, and designs the structure of the second sub-electrode 122.
In this embodiment, the first sub-electrode 121 includes a first compensation domain 1211 close to the side of the symmetry axis and a first main domain 1212 distant from the side of the symmetry axis, and a projected area of the first main domain 1212 is larger than a projected area of the first compensation domain 1211, and as shown in fig. 6, an extending direction of the first main domain 1212 is an inclined direction having an inclination angle β 1 with respect to the first direction D1, an electric field of the first main domain 1212 is relatively regular, and display performance in a white or black screen is good.
Similarly, the second sub-electrode 122 includes a second compensation domain 1221 near one side of the symmetry axis and a second main domain 1222 distant from the other side of the symmetry axis, the first main domain 1212 has a larger projected area than the first compensation domain 1211, the second main domain 1222 extends in a direction inclined at an angle β 2 with respect to the first direction D1, the electric field of the second main domain 1222 is relatively regular, and the display performance in the white or black screen is good.
In this embodiment, the first compensation domain 1211 and the second compensation domain 1221 are disposed at the intersection position of the first sub-electrode 121 and the second sub-electrode 122, the first compensation domain 1211 and the second compensation domain 1221 intersect to form a first protrusion structure, the first compensation domain 1211 extends in a direction inclined at an inclination angle β 3 with respect to the first direction D1, and the second compensation domain 1221 extends in a direction inclined at an inclination angle β 4 with respect to the first direction D1.
In this embodiment, two symmetrical compensation domains are disposed at the intersection of the first sub-electrode 121 and the second sub-electrode 122, so that the disturbance electric field at the original intersection is improved, and the first compensation domain 1211 is used to improve the electric field at the upper half of the intersection, so that the ordering of the corresponding liquid crystal molecules at the first compensation domain 1211 is more regular, thereby improving the display brightness of the liquid crystal at the intersection.
Further, in this embodiment, the second compensation domain 1221 is also used to improve the electric field at the lower half of the intersection, so that the ordering of the corresponding liquid crystal molecules at the second compensation domain 1221 is relatively regular, thereby improving the display brightness of the liquid crystal at the lower half of the intersection. Therefore, according to the embodiment of the present invention, the display luminance of the respective regions can be improved by the first compensation domain 1211 and the second compensation domain 1221, and the contrast ratio is further effectively improved after the luminance of the L255 display screen is improved according to the principle that the contrast ratio CR = L255/L0.
For example, as shown in fig. 8a, the boundary between the first compensation domain 1211 and the second compensation domain 1221 is a straight line, the inclination angle β 3 formed by the first compensation domain 1211 and the first direction D1 ranges from 135 ° to 150 °, the inclination angle β 4 formed by the second compensation domain 1221 and the first direction D1 ranges from 135 ° to 150 °, and thus the angle range of the convex structure formed by the first compensation domain 1211 and the second compensation domain 1221 ranges from 60 ° to 90 °.
In a specific example, the angle range formed by the first main domain 1212 and the first direction D1 is 60 ° to 75 ° such that the angle range formed by the first main domain 1212 and the first compensation domain 1211 is 90 ° to 120 °, and the arrangement is such that the liquid crystal layer 30 corresponding to the first compensation domain 1211 and the second compensation domain 1221 compensates for each other based on the improvement of the display luminance of the respective regions by the first compensation domain 1211 and the second compensation domain 1221, that is, the display effect of the second compensation domain 1221 in the lower half is compensated for by the display effect of the first compensation domain 1211 in the upper half, and the display effect at the boundary position is improved by the second compensation domain 1221, and the contrast of the liquid crystal display panel is further improved by improving the display luminance of the L255 screen.
Illustratively, as shown in fig. 8b, the boundaries of the first compensation domain 1211 and the second compensation domain 1221 are arc-shaped, in an alternative embodiment, the first compensation domain 1211 and the second compensation domain 1221 are arranged to form a convex structure, the direction of the convex structure is the same as the array arrangement direction of the first electrodes 12 in fig. 8b, an extension of the first main domain 1212 to a side close to the first direction D1 and an extension of the second main domain 1222 to a side close to the first direction D1 form a convex first included angle (α 1+ α 2), exemplarily, as shown in fig. 6, that is, the embodiment eliminates the first included angle at the boundary position of the first sub-electrode 121 and the second sub-electrode 122, and arranges the first compensation domain 1211 and the second domain 1221 to form a convex structure, and the convex direction of the first convex structure is opposite to the convex direction of the first included angle, thereby reducing the disturbance of the electric field at the boundary position, and improving the contrast of the liquid crystal display panel by using the first compensation domain 1211 and the second compensation domain 1221.
In this embodiment, as shown in fig. 3, along the second direction D2, the widths of the hollow-out areas 124 in the first direction D1 gradually decrease, and in the second direction D2, the adjacent hollow-out areas 124 are disposed on two sides of the projection of the gate line on the first substrate 11.
FIG. 9 is a schematic view of the layer structure of AA section shown in FIG. 3, FIG. 10 is a schematic view of the layer structure of BB section shown in FIG. 4,
as shown in fig. 9 and 10, the second substrate 20 includes:
a second substrate 21, and
a black matrix 22 (BM) disposed on a side of the second substrate 21 adjacent to the first substrate 10,
the projections of the black matrixes 22 on the first substrate 11 are overlapped with the projections of the adjacent hollow areas 124 on the first substrate 11 in the second direction D2, and the projections of the gate lines between the adjacent hollow areas 124 on the first substrate 11 are covered.
Since the sharp slits of the hollow-out areas 124 are also weak areas, in this embodiment, each hollow-out area 124 is set to extend along the second direction D2, the plurality of hollow-out areas 124 are arranged along the first direction D1, and the sharp slits at the edges of the hollow-out areas 124 are disposed on the left and right sides of the Gate line, so that the width of the black matrix 22 disposed on one side of the color film substrate and covering the Gate line can be reduced, and the problem of light leakage at the weak areas can be well solved.
As shown in fig. 9, a third insulating layer 157 is disposed between the first electrode 12 and the source-drain metal layer 155 and on a side close to the first electrode 12 at the AA cross-sectional position shown in fig. 3, and the third insulating layer 157 is an organic insulating layer. In this embodiment, the active layer 151 at this position is located at the projection of the data line 17 on the first substrate, and the thickness of the third insulating layer 157 at the position of the data line 17 is greater than the thickness at the sub-pixel regions on both sides of the data line 17. That is, the third insulating layer 157 at the position of the data line 17 is a convex structure, and by this arrangement, it is possible to shield the electric field between the common electrode and the data line with the third insulating layer having a thicker thickness at the position of the data line, thereby improving the overall performance of the liquid crystal display panel.
In an alternative embodiment, the liquid crystal display panel further includes support pillars (not shown in the figure), the array of support pillars is disposed on a surface of the gate line 16 on a side away from the first substrate 11, and a projection of the support pillars on the first substrate 11 covers a projection of the gate line 16 on the first substrate 11.
In this embodiment, the support column is periodically arranged above the Gate line 16, and the line width of the Gate line is reduced to 28.6um, so that the width of the BM at the Gate line is reduced to 79.4um, and through the arrangement, the uniformity of the support column is ensured, and the light leakage of the support column to the hollow area 124 can be ensured to be shielded.
In a specific example, simultaneously under the circumstances of guaranteeing the charging rate, the linewidth of source leakage electrode reduces to 5um to can realize reducing the BM of source leakage electrode position to 8um, play the effect that promotes the aperture opening ratio.
Meanwhile, in this embodiment, the first electrode 12 is connected to a Vcom signal (common voltage), the second electrode 14 is connected to a pixel voltage signal, and in the layer structure direction, the first electrode 12 is disposed above the second electrode 14 in a covering manner, that is, the first electrode 12 is disposed on the source-drain metal layer 155, and an electric field at the first electrode 12 can generate a certain shielding effect on an electric field of the Data line 17, so that the problem of light leakage in a weak area at two sides of the Data line can be reduced.
Through the above arrangement, the liquid crystal display panel of the embodiment can greatly improve the product transmittance and the aperture opening ratio, and exemplarily, under the same size, the transmittance of the liquid crystal display panel based on the structures of fig. 9 and 10 can be improved by about 27.5%, and the aperture opening ratio can be improved by about 16% -25%, so that the improvement of the transmittance and the aperture opening ratio can reduce the power consumption of a TV product by using a lower driving voltage under the condition of the same brightness, and the liquid crystal display panel has a wide application prospect.
It should be noted that, in the present embodiment, the "first" and the "second" of the first electrode and the second electrode are only used to distinguish the two electrodes, and in the actual process, the second electrode close to one side of the first substrate is formed first. It should be further noted that fig. 9 and fig. 10 of this embodiment are only schematic diagrams, for example, the active layer 151 and the source drain electrode layer 155 are exemplary electrical connection structures, and electrical connection is achieved through a via hole in an actual process.
Another embodiment of the present invention provides a display device including the liquid crystal display panel of the above embodiment. The display device of the embodiment of the invention can be any product or component requiring a liquid crystal display panel, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a vehicle-mounted display device, and the like, and the embodiment of the invention does not limit the product or the component.
Another embodiment of the present invention provides a method of making the above embodiment, the method comprising:
forming the first substrate;
forming the second substrate;
forming a liquid crystal layer between the first substrate and the second substrate,
the first substrate and the second substrate are sealed with each other,
wherein forming the first substrate includes:
forming first electrodes on the first substrate, wherein the first electrodes are arrayed in a first direction and a second direction perpendicular to the first direction, the first electrodes comprise a plurality of first sub-electrodes arranged in parallel and a plurality of second sub-electrodes arranged in parallel, and the first sub-electrodes and the second sub-electrodes are arranged in a crossed manner on the projection of the first substrate;
forming a shielding layer on the first substrate, wherein the projection of the shielding layer on the first substrate covers the position of the first electrode and the second electrode which are intersected.
According to the liquid crystal display panel manufactured by the embodiment of the invention, when the light is emitted from the light source which is arranged on the side, away from the liquid crystal layer 30, of the first substrate 11, the shielding layer 13 can shield the junction of the first sub-electrode 121 and the second sub-electrode 122, so that the light is prevented from further leaking from the disordered liquid crystal at the junction due to the incidence of the light from the junction, and the problem of poor black lines under a white picture shown in fig. 1 is solved. In addition, the liquid crystal display panel of the present embodiment can further improve the contrast ratio while solving the black line defect.
The principle and the process related to the manufacturing method of the embodiment of the invention can be referred to the display panel of the foregoing embodiment, and are not described herein again.
It is further noted that, in the description of the present invention, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations and modifications can be made on the basis of the above description, and all embodiments cannot be exhaustive, and all obvious variations and modifications belonging to the technical scheme of the present invention are within the protection scope of the present invention.
Claims (12)
1. A liquid crystal display panel, comprising: a first substrate, a second substrate disposed opposite to the first substrate, and a liquid crystal layer between the first substrate and the second substrate,
the first substrate includes:
a first substrate;
first electrodes provided on a side of the first substrate close to the second base plate, the first electrodes being arranged in an array in a first direction and a second direction perpendicular to the first direction,
the first electrode comprises a plurality of first sub-electrodes arranged in parallel and a plurality of second sub-electrodes arranged in parallel, and the first sub-electrodes and the second sub-electrodes intersect in projection on the first substrate;
the first substrate further comprises a shielding layer arranged on one side surface of the first substrate close to the second substrate, and the projection of the shielding layer on the first substrate covers the positions of the first electrode and the second electrode which are intersected.
2. The liquid crystal display panel according to claim 1, wherein the first electrode further comprises a third sub-electrode located at an intersection of the first sub-electrode and the second sub-electrode and extending in the first direction, the third sub-electrode connecting the adjacent first sub-electrodes and connecting the adjacent second sub-electrodes, a projection of the third sub-electrode on the first substrate covering the intersection of the first electrode and the second electrode.
3. The liquid crystal display panel according to claim 2,
the projections of the adjacent first sub-electrodes and the adjacent second sub-electrodes on the first substrate form a plurality of hollow areas arranged along a first direction;
and the projection of the third sub-electrode on the first substrate splits the hollow area into two sub-hollow areas.
4. The liquid crystal display panel according to claim 2,
the third sub-electrode and the second sub-electrode or the third sub-electrode and the first sub-electrode are arranged in the same layer,
the third sub-electrode, the second sub-electrode or the first sub-electrode are made of transparent materials.
5. The liquid crystal display panel according to claim 1, wherein the first sub-electrode and the second sub-electrode are disposed symmetrically with respect to an axis parallel to the first direction,
the first sub-electrode includes a first compensation domain near a side of a symmetry axis and a first main domain far from the side of the symmetry axis, a projected area of the first main domain is larger than a projected area of the first compensation domain,
the second sub-electrode includes a second compensation domain near one side of the symmetry axis and a second main domain far from the other side of the symmetry axis, a projected area of the first main domain is larger than a projected area of the first compensation domain,
the first compensation domains and the second compensation domains intersect to form a first protrusion structure.
6. The liquid crystal display panel according to claim 5,
a first included angle having a protrusion is formed between an extension line of the first main domain region to a side close to the first direction and an extension line of the second main domain region to a side close to the first direction,
the protruding direction of the first protruding structure is opposite to the protruding direction of the first included angle.
7. The liquid crystal display panel according to claim 1, wherein the first substrate further comprises:
the second electrode is positioned on one side of the first substrate close to the second substrate;
the thin film driving transistor comprises an active layer, a grid metal layer, a source drain electrode layer connected with the active layer, a first insulating layer positioned between the active layer and the grid metal layer, and a second insulating layer covering the source drain electrode layer; and
and a third insulating layer between the second electrode and the thin film driving transistor.
8. The liquid crystal display panel according to claim 7, wherein the shielding layer is a metal layer and is disposed on the same layer as the gate metal layer or the source/drain electrode layer.
9. The liquid crystal display panel according to claim 7,
the shielding layer is an insulating layer and is arranged on the same layer as the first insulating layer, or arranged on the same layer as the second insulating layer, or arranged on the same layer as the third insulating layer.
10. The liquid crystal display panel according to claim 7, wherein the first substrate further comprises:
a gate line connected to the gate metal layer, extending in the first direction, and arranged in the second direction;
the data line is connected with the source drain metal layer, extends along the second direction and is arranged along the first direction; and
the grid line and the data line are insulated from each other and crossed to define a sub-pixel area of the first substrate,
wherein the active layer is located at the projection of the data line on the first substrate, and the thickness of the third insulating layer at the position of the data line is greater than the thickness of the third insulating layer at the sub-pixel regions at two sides of the data line.
11. A liquid crystal display device comprising the liquid crystal display panel according to any one of claims 1 to 10.
12. A method of manufacturing the liquid crystal display panel according to any one of claims 1 to 10, characterized in that the method comprises:
forming the first substrate;
forming the second substrate;
forming a liquid crystal layer between the first substrate and the second substrate,
the first substrate and the second substrate are sealed with each other,
wherein forming the first substrate comprises:
forming the first electrodes on the first substrate, wherein the first electrodes are arrayed in a first direction and a second direction perpendicular to the first direction, the first electrodes comprise a plurality of first sub-electrodes arranged in parallel and a plurality of second sub-electrodes arranged in parallel, and the first sub-electrodes and the second sub-electrodes are arranged in a crossed manner on the projection of the first substrate;
forming the shielding layer on the first substrate, wherein the projection of the shielding layer on the first substrate covers the position of the first electrode and the second electrode which are intersected.
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