CN111240105B - Display panel and display device - Google Patents
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- CN111240105B CN111240105B CN202010116630.0A CN202010116630A CN111240105B CN 111240105 B CN111240105 B CN 111240105B CN 202010116630 A CN202010116630 A CN 202010116630A CN 111240105 B CN111240105 B CN 111240105B
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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
Abstract
The present disclosure provides a display panel and a display device. The display panel comprises a first substrate and a second substrate which are oppositely arranged, and a liquid crystal layer arranged between the first substrate and the second substrate; the liquid crystal display panel comprises a first substrate, a second substrate and a plurality of sub-pixel units, wherein one side of the first substrate, which is close to the second substrate, is provided with a plurality of sub-pixel units arranged in an array mode, and a plurality of data signal lines extending along a first direction, each sub-pixel unit comprises a sub-pixel electrode, each sub-pixel electrode comprises a main electrode, a plurality of branch electrodes and a peripheral connecting portion surrounding the main electrode and the corresponding electrode, side electrodes are arranged on two sides of the peripheral connecting portion of each sub-pixel electrode, and the deflection direction of liquid crystal molecules with large pretilt angles is controlled through the side electrodes arranged in parallel with the data signal lines, so that the influence of the large transverse pretilt angles caused by the ox horn-shaped protruding portions on the deflection of the liquid crystal molecules is improved, the degree of alignment dark stripes and light leakage on two sides of the sub-pixel electrodes is reduced, and the penetration rate of light is improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a display device.
Background
For a color filter on array (COA) structure commonly found in a negative lcd panel, as shown in fig. 1, a color filter 12 needs to be formed on an array substrate 11, and a black matrix (DBS) electrode 13 for reducing data lines needs to be covered above a ox horn-shaped protrusion portion formed by overlapping two color resistors of different colors in the color filter 12, so as to prevent a light leakage phenomenon caused by a large horizontal pretilt angle of liquid crystal caused by the protrusion portion and a deflection of the liquid crystal in the portion, thereby controlling the liquid crystal not to fall down and achieving the purpose of shielding light. However, the DBS electrode 13 compresses the area of the sub-pixel electrode 14, so that the aperture ratio of the sub-pixel unit is limited and the light transmittance is reduced.
To further increase the transmittance, the new pixel unit architecture starts to remove the DBS electrode 13, as shown in fig. 2, the peripheral connecting portion 161 of the sub-region 16 extends along the data line signal line 17 and surrounds both sides of the main region 15, so as to utilize the peripheral connecting portion 161 of the sub-region 16 to replace the function of the DBS electrode, form a slit with the peripheral connecting portion 151 of the main region 15, and cooperate therewith, so that the liquid crystal molecules near the convex portion deflect along the alignment direction indicated by the arrow 152 according to the preset angle, thereby shielding the large horizontal pretilt angle caused by the convex portion, and although the aperture ratio is increased, the two side portions 162 of the sub-region 16 lack the corresponding DBS electrode, so that the liquid crystal molecules of the portion are in a disordered state in which the alignment direction indicated by the arrow 163 is vertically aligned and horizontally aligned, and the alignment dark stripe still exists in the portion, The problem of light leakage limits the spread of this technology, and improvement is urgently needed.
In summary, the conventional display panel has the problems of alignment dark stripes and light leakage after the DBS electrode is removed. Therefore, it is necessary to provide a display panel to improve this defect.
Disclosure of Invention
The embodiment of the disclosure provides a display panel, which is used for solving the problems of alignment dark stripes and light leakage after a DBS electrode of the display panel is removed.
The embodiment of the disclosure provides a display panel, which includes a first substrate and a second substrate arranged oppositely, and a liquid crystal layer arranged between the first substrate and the second substrate;
a plurality of sub-pixel units arranged in an array and a plurality of data signal lines extending along a first direction are arranged on one side of the first substrate close to the second substrate, each sub-pixel unit comprises a sub-pixel electrode, and each sub-pixel electrode comprises a main electrode, a plurality of branch electrodes and a peripheral connecting part surrounding the main electrode and the branch electrodes;
the sub-pixel electrodes further comprise side electrodes respectively located on two sides of the peripheral connecting portion, and the side electrodes are connected with the main electrode and arranged in parallel with the data signal lines.
According to an embodiment of the present disclosure, the sub-pixel electrode includes a main area and a sub-area, the main area and the sub-area are each provided with the main electrode, the branch electrode and the peripheral connecting portion therein, and the side electrode is connected to one of the main area and the sub-area, and extends along the first direction and surrounds both sides of the main area and the sub-area.
According to an embodiment of the present disclosure, the main electrode includes a vertical main electrode extending along the first direction and a horizontal main electrode extending perpendicular to the first direction, the main electrode and the horizontal main electrode divide the main region and the sub region into a plurality of domains, and the branch electrode is located in the domains.
According to an embodiment of the disclosure, the branch electrodes in the same domain are parallel to each other and are arranged at equal intervals, and the extending directions of the branch electrodes in two adjacent domains are different.
According to an embodiment of the present disclosure, an orthographic projection area of the side electrode on the first substrate partially overlaps with an orthographic projection area of the data signal line on the first substrate.
According to an embodiment of the present disclosure, a distance between the side electrode and the peripheral connecting portion is less than or equal to 5 μm.
According to an embodiment of the present disclosure, a distance between the side electrode and the peripheral connection portion is equal to a distance between adjacent branch electrodes located in the same domain.
According to an embodiment of the present disclosure, a plurality of DBS electrodes extending along the first direction are further disposed on one side of the first substrate close to the second substrate, and the DBS electrodes are located on one side of the side electrodes away from the main region and overlap with an orthographic projection area of the data signal lines on the first substrate.
According to an embodiment of the present disclosure, the display panel further includes a color filter layer disposed on one side of the first substrate close to the second substrate or on one side of the second substrate close to the first substrate.
The embodiment of the disclosure also provides a display device, which includes the display panel.
The beneficial effects of the disclosed embodiment are as follows: the display panel provided by the embodiment of the disclosure arranges the side electrodes on two sides of the peripheral connecting part of the sub-pixel electrode, so as to control the deflection direction of the liquid crystal molecules with large pretilt angles through the side electrodes arranged in parallel with the data signal lines, thereby improving the influence of the large transverse pretilt angles caused by the ox horn-shaped convex parts on the deflection of the liquid crystal molecules, reducing the degree of alignment dark stripes and light leakage on two sides of the sub-pixel electrode, and improving the penetration rate of light.
Drawings
In order to illustrate the embodiments or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some of the disclosed embodiments, and that other drawings can be obtained by those skilled in the art without inventive effort.
FIG. 1 is a schematic cross-sectional view of a prior art display panel according to the present disclosure;
FIG. 2 is a schematic diagram of a prior art sub-pixel electrode according to the present disclosure;
fig. 3 is a schematic cross-sectional view illustrating a display panel according to an embodiment of the disclosure;
fig. 4 is a schematic structural diagram of a sub-pixel electrode according to an embodiment of the disclosure.
Detailed Description
The following description of the various embodiments refers to the accompanying drawings, which illustrate specific embodiments in which the disclosure may be practiced. Directional phrases used in this disclosure, such as [ upper ], [ lower ], [ front ], [ back ], [ left ], [ right ], [ inner ], [ outer ], [ side ], etc., refer only to the directions of the attached drawings. Accordingly, the directional terms used are used for the purpose of illustration and understanding of the present disclosure, and are not used to limit the present disclosure. In the drawings, elements having similar structures are denoted by the same reference numerals.
The present disclosure is further described with reference to the following drawings and detailed description.
The present disclosure provides a color filter on array (COA) liquid crystal display panel on an array substrate, which is described in detail with reference to fig. 3 to 4. As shown in fig. 3, fig. 3 is a schematic cross-sectional structure diagram of a display panel according to an embodiment of the disclosure, in which the display panel includes a first substrate 21 and a second substrate 22 disposed opposite to each other, and a liquid crystal layer 23 disposed between the first substrate 21 and the second substrate 22.
The first substrate 21 is an array substrate, and a side of the first substrate 21 close to the second substrate 22 is provided with a gate insulating layer 211, a first passivation protection layer 212, a color filter layer 24 on the first passivation protection layer 212, a second passivation protection layer 213 covering the color filter layer 24, a plurality of thin film transistors, a plurality of data signal lines 214 extending along a first direction and a plurality of scanning lines extending along a direction perpendicular to the first direction, on a side of the gate insulating layer 211 away from the first substrate 21. In addition, the first substrate 21 is further provided with a plurality of sub-pixel units arranged in an array, each data signal line 214 corresponds to one column of sub-pixel units, and each scanning line corresponds to one row of sub-pixel units.
The sub-pixel unit includes a sub-pixel electrode 25, as shown in fig. 4, and fig. 4 is a schematic structural diagram of the sub-pixel electrode 25 according to the embodiment of the disclosure. The sub-pixel electrode 25 includes a main area a in which a first main electrode 251, a plurality of first branch electrodes 252, and a first peripheral connection portion 253 surrounding the first main electrode 251 and the first branch electrodes 252 are disposed, and a sub-area B in which a second main electrode 254, a second branch electrode 255, and a second peripheral connection portion 256 connecting the second main electrode 254 and the second branch electrodes 255 are disposed.
Specifically, the first main electrode 251 includes a first vertical main electrode 2511 extending in a first direction and a first horizontal main electrode 2512 extending perpendicular to the first direction, the first vertical main electrode 2511 and the first horizontal main electrode 2512 divide the main region a into 4 domains, and the first branch electrodes 252 are respectively located in each domain. The second main electrode 254 includes a second vertical main electrode 2541 extending along the first direction and a second horizontal main electrode 2542 extending perpendicular to the first direction, the sub-region B is divided into 4 domains by the second vertical main electrode 2541 and the second horizontal main electrode 2542, and the second branch electrodes 255 are respectively located in the domains, so as to jointly form an 8-domain framework of the sub-pixel electrode 25.
As shown in fig. 4, the plurality of first branch electrodes 252 located in the same domain are parallel to each other and are equidistantly spaced, and the extending directions of the branch electrodes in two adjacent domains are different. Specifically, the first branch electrodes 252 in each domain extend along directions forming angles of 45 °, 135 °, -135 °, and-45 ° with the first direction, respectively, and the arrangement of the second branch electrodes 255 is the same as that of the first branch electrodes 252, and will not be described herein again.
In the embodiment of the present disclosure, the sub-pixel electrode 25 further includes side electrodes 257 respectively disposed at two sides of the first and second peripheral connecting portions 253 and 256, and the strip-shaped side electrodes 257 are connected to the second main electrode 254 and arranged in parallel with the data signal line 214.
Specifically, as shown in fig. 4, two strip-shaped side electrodes 257 are respectively connected to two ends of the second horizontal trunk electrode 2542 of the second trunk electrode 254 in the sub-region B, extend along the first direction, and surround two sides of the main region a and the sub-region B, and the side electrodes 257 are further arranged in parallel with and spaced from two sides of the first peripheral connecting portion 253 and two sides of the second peripheral connecting portion 256, so as to form a long and narrow gap. The narrow gaps are located on two sides of the ox horn-shaped protrusion formed by overlapping two adjacent color resistors of different colors in the color filter layer 24, and as described in the background art, the protrusion may cause the liquid crystal molecules near the protrusion to have a large horizontal pretilt angle, resulting in alignment dark stripes or random stripes.
When the display panel normally works, the patterned electrodes formed by the side electrodes 257, the first peripheral connecting portion 253 and the second peripheral connecting portion 256, which are parallel to each other and spaced apart from each other, can align the liquid crystal molecules of the convex portions close to the ox-horn shape in the direction in which the gaps formed by the branch electrodes in the domain extend, which is beneficial to controlling the deflection direction of the liquid crystal molecules with the large transverse pretilt angle, and preventing the liquid crystal molecules from being disturbed in the deflection direction due to the large transverse pretilt angle, thereby shielding and improving the influence of the large transverse pretilt angle caused by the convex portions, effectively reducing the degree of dark fringes, and improving the deflection stability of the liquid crystal molecules. In addition, the area of the sub-pixel electrode 25 after removing and reducing the black matrix (DBS) electrode on the data line is increased, so that the aperture ratio of the sub-pixel electrode 25 is increased, and the light transmittance of the sub-pixel unit is improved.
Further, an orthographic projection area of the side electrode 257 on the first substrate 21 partially overlaps with an orthographic projection area of the data signal line 214 on the first substrate 21. In the prior art shown in fig. 1, a DBS electrode is used to shield a data signal line located below the DBS electrode, so as to replace a black matrix to achieve the purpose of shading. In the embodiment of the present disclosure, after the DBS electrode is removed, the data signal line 214 needs to be shielded by the side electrode 257 partially overlapping the data signal line 214 to prevent crosstalk caused by the main area a mainly lit in the low gray scale state, and meanwhile, the electric field formed between the side electrode 257 and the common electrode 221 located on the side of the second substrate 22 close to the first substrate 21 can keep the liquid crystal molecules between the side electrode 257 and the common electrode 221 in a non-deflected state, thereby achieving the purpose of shielding light.
Preferably, in order to secure the shielding effect of the side electrode 257 to the data signal line 214, it is necessary to keep the width of the overlapping portion of the side electrode 257 and the data signal line 214 to 1 μm or more, thereby preventing crosstalk caused by the main region a which is mainly lit at a low gray scale.
Further, if the distance (i.e., the long and narrow gap) between the side electrode 257 and the first and second peripheral connecting portions 253 and 256 is too large, the side electrode 257 has a weak alignment effect on the liquid crystal molecules having a large lateral pretilt angle, and the control efficiency is low, so that the influence of the large lateral pretilt angle due to the protruding portion cannot be effectively shielded. Therefore, in order to ensure the control efficiency of the side electrodes 254 and the peripheral connecting portions 253 with respect to the deflection direction of the portion of the liquid crystal molecules, the distance between the side electrodes 254 and the peripheral connecting portions 253 should be less than or equal to 5 μm. Meanwhile, the distance between the side electrode 254 and the peripheral connection portion 253 cannot be too small, otherwise, a short circuit may occur with the peripheral connection portion 253 or the main area a during the manufacturing process, resulting in poor display.
Preferably, the distance between the side electrode 254 and the peripheral connecting portion 253 is equal to the distance between the adjacent branch electrodes 252 in the same domain, so as to control the deflection direction of the liquid crystal molecules and facilitate the fabrication of the actual manufacturing process.
In some embodiments, the side electrodes 254 may also connect the first horizontal trunk electrodes 2512 of the first trunk electrodes 251 of the main region a, extend in the first direction, surround both sides of the main region a and the sub-region B, and are spaced apart from and parallel to both sides of the first and second peripheral connecting portions 253 and 256 to form an elongated gap. The control of the deflection direction of the liquid crystal molecules with the transverse large pretilt angle can be facilitated, the deflection direction disorder caused by the transverse large pretilt angle can be prevented, the influence of the transverse large pretilt angle caused by the convex part is shielded and improved, the degree of dark fringes is effectively reduced, and the deflection stability of the liquid crystal molecules is improved. In addition, it is also possible to design the main area a and the sub-area B to be respectively configured with a separate side electrode 257, and the above technical effects can be achieved as well, and this is not limited herein.
The sub-pixel electrode provided by the embodiment of the present disclosure eliminates the DBS electrode in the prior art, but in some embodiments, the DBS electrode may be combined with the side electrode provided by the embodiment of the present disclosure, so as to prevent the fixed and wide dark fringes that may exist at the two sides of the sub-pixel electrode when the voltage difference is insufficient. Specifically, the plurality of DBS electrodes extending along the first direction are disposed on a side of the first substrate close to the second substrate, and are disposed on the same layer as the sub-pixel electrodes 25, on a side of the side electrode 257 away from the main area a. In this embodiment, the DBS electrode may be used to cover the data signal line 214, that is, the orthographic projection area of the DBS electrode on the first substrate 21 covers the orthographic projection area of the data signal line 214 on the first substrate 21, so as to obtain better shielding and shading effects.
In this embodiment, the plurality of thin film transistors disposed on the first substrate 21 are disposed on a side of the main region a away from the sub-region B. Specifically, the plurality of thin film transistors include a first thin film transistor and a second thin film transistor, the first peripheral connection portion 253 of the main region a is a semi-enclosed structure, and the first branch electrode 252 in the main region a extends to a via hole through an opening of the first peripheral connection portion 253 and is connected to the first thin film transistor through the via hole; the second peripheral connection portion 256 of the sub-region B is a closed structure, and the sub-region B extends to another via hole through the side electrode 254 connected thereto, and is connected to the second thin film transistor through the via hole. Of course, in some embodiments, the first peripheral connecting portion 253 in the primary zone a may also be in a closed structure, and the second peripheral connecting portion 256 in the secondary zone B may also be in a semi-enclosed structure, which is not limited herein.
In the film structure of the display panel provided in the embodiment of the present disclosure, the second passivation layer 213 is used to cover the color filter layer 24, so that the side electrodes 257 are required to shield the lateral large pretilt angle caused by the ox-horn-shaped protruding portions. In some embodiments, the organic polymer layer may be used to cover the color filter layer 24, so as to planarize the ox horn-shaped protrusion formed on the color filter layer 24 to improve the ox horn shape, and the pixel electrode structure of the side electrode 257 provided in the embodiments of the present disclosure is also applicable to this embodiment and can achieve the same technical effect, which is not limited herein.
The display panel provided in the embodiment of the present disclosure is a liquid crystal display panel of COA structure, and the structure of the sub-pixel electrode provided in the embodiment of the present disclosure is also applicable to a liquid crystal display panel of non-COA structure (non-COA structure) in which the color filter layer 24 is disposed on the side of the second substrate 22 close to the first substrate 21, and is not limited herein.
The beneficial effects of the disclosed embodiment are as follows: the display panel provided by the embodiment of the disclosure arranges the side electrodes on two sides of the peripheral connecting part of the sub-pixel electrode, so as to control the deflection direction of the liquid crystal molecules with large pretilt angles through the side electrodes arranged in parallel with the data signal lines, thereby improving the influence of the large transverse pretilt angles caused by the ox horn-shaped convex parts on the deflection of the liquid crystal molecules, reducing the degree of alignment dark stripes and light leakage on two sides of the sub-pixel electrode, and improving the penetration rate of light.
The present disclosure also provides a display device including the display panel provided in the above embodiments, and the same technical effects as those of the display panel provided in the above embodiments can be achieved, and details are not repeated herein.
In summary, although the present disclosure has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present disclosure, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, so that the scope of the present disclosure is defined by the appended claims.
Claims (7)
1. The display panel is characterized by comprising a first substrate, a second substrate and a liquid crystal layer, wherein the first substrate and the second substrate are oppositely arranged, and the liquid crystal layer is arranged between the first substrate and the second substrate;
a plurality of sub-pixel units arranged in an array and a plurality of data signal lines extending along a first direction are arranged on one side of the first substrate close to the second substrate, each sub-pixel unit comprises a sub-pixel electrode, and each sub-pixel electrode comprises a main electrode, a plurality of branch electrodes and a peripheral connecting part surrounding the main electrode and the branch electrodes;
the sub-pixel electrodes further comprise side electrodes respectively positioned at two sides of the peripheral connecting part, and the side electrodes are connected with the main electrode and arranged in parallel with the data signal lines; the sub-pixel electrodes comprise a main area and an auxiliary area, the main electrode, the branch electrodes and the peripheral connecting parts are arranged in the main area and the auxiliary area, and the side electrodes are connected with one of the main area and the auxiliary area, extend along the first direction and surround two sides of the main area and the auxiliary area; the orthographic projection area of the side electrode on the first substrate is partially overlapped with the orthographic projection area of the data signal line on the first substrate, and the distance between the side electrode and the peripheral connecting part is less than or equal to 5 μm.
2. The display panel according to claim 1, wherein the trunk electrode includes a vertical trunk electrode extending in the first direction and a horizontal trunk electrode extending in a direction perpendicular to the first direction, the vertical trunk electrode and the horizontal trunk electrode divide the main region and the sub region into a plurality of domains, and the branch electrode is located in the domains.
3. The display panel according to claim 2, wherein the branch electrodes in the same domain are parallel to each other and are equidistantly spaced, and the extension directions of the branch electrodes in two adjacent domains are different.
4. The display panel according to claim 3, wherein a distance between the side electrode and the peripheral connecting portion is equal to a distance between adjacent branch electrodes in the same domain.
5. The display panel according to claim 1, wherein a side of the first substrate adjacent to the second substrate is further provided with a plurality of DBS electrodes extending along the first direction, and the DBS electrodes are located on a side of the side electrodes away from the main area and overlap with an orthographic projection area of the data signal lines on the first substrate.
6. The display panel according to claim 1, wherein the display panel further comprises a color filter layer provided on one side of the first substrate close to the second substrate or on one side of the second substrate close to the first substrate.
7. A display device characterized by comprising the display panel according to any one of claims 1 to 6.
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| CN202010116630.0A CN111240105B (en) | 2020-02-25 | 2020-02-25 | Display panel and display device |
| PCT/CN2020/085094 WO2021169006A1 (en) | 2020-02-25 | 2020-04-16 | Display panel and display apparatus |
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| CN202010116630.0A CN111240105B (en) | 2020-02-25 | 2020-02-25 | Display panel and display device |
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| TWI730829B (en) * | 2020-06-29 | 2021-06-11 | 友達光電股份有限公司 | Liquid crystal display panel |
| CN112859403A (en) | 2021-03-01 | 2021-05-28 | Tcl华星光电技术有限公司 | Liquid crystal display panel |
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| CN209103057U (en) * | 2018-10-29 | 2019-07-12 | 惠科股份有限公司 | Array substrate and display panel |
| CN109375433A (en) * | 2018-10-30 | 2019-02-22 | 惠科股份有限公司 | A kind of pixel electrode and display panel, display device of display panel |
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| Publication number | Publication date |
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| WO2021169006A1 (en) | 2021-09-02 |
| CN111240105A (en) | 2020-06-05 |
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