CN113009739B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN113009739B CN113009739B CN202110300577.4A CN202110300577A CN113009739B CN 113009739 B CN113009739 B CN 113009739B CN 202110300577 A CN202110300577 A CN 202110300577A CN 113009739 B CN113009739 B CN 113009739B
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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
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
- G02F1/134363—Electrodes characterised by their geometrical arrangement for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
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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
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- Optics & Photonics (AREA)
- Geometry (AREA)
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
Abstract
The invention provides a display panel and a display device, wherein the display panel comprises a first display area, the first display area comprises a plurality of sub-pixel units, a bulge part is arranged in the first display area, the bulge part is overlapped with the sub-pixel units in the orthographic projection of the display panel, the bulge part is provided with a first side edge and a second side edge, a first driving electrode is arranged on the first side edge, a second driving electrode is arranged on the second side edge, in the same sub-pixel unit, the first driving electrode and the second driving electrode are alternately arranged, when different potential signals are applied to the first driving electrode and the second driving electrode, a horizontal electric field is formed between the first driving electrode and the second driving electrode, so that liquid crystal molecules in a liquid crystal layer rotate in the horizontal electric field, the liquid crystal molecules cannot generate obvious periodical inclined and twisted arrangement, and the diffraction phenomenon generated by periodical arrangement of light through the liquid crystal deflection is greatly reduced, thereby improving the imaging effect.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
The rapid development of the display technology brings extraordinary experience to the display of information in life and work of people. At present, spaces are always reserved for electronic photosensitive devices such as commonly used front cameras, infrared sensing devices and fingerprint identification devices on the front of display equipment such as mobile phones and tablet computers, and therefore, blind hole screens, bang screens and water drop screens for reserving the spaces for the cameras and the sensing devices in a display area of the display panel are generated.
However, people do not stop following the steps of a real full screen, and more electronic photosensitive devices are integrated below or inside the screen without influencing the normal display of the display panel. For example, a camera is disposed below the screen and a position corresponding to the camera is set as a high light transmission region. When the display is normal, the high-light-transmittance area can play a display role; when a picture or a video needs to be taken, the camera takes a picture or a video through the high light-transmitting area. However, since the light still needs to pass through the display panel and reach the camera, some problems still occur in the pictures or videos shot by the camera, for example, diffraction phenomenon occurs after the light passes through the display panel, which affects the display quality of the shot pictures and videos, and thus a solution is needed by those skilled in the art.
Disclosure of Invention
In view of the above, embodiments of the present invention provide a display panel and a display device.
In a first aspect, the present application provides a display panel, which includes an array substrate and a color film substrate that are oppositely disposed, and a liquid crystal layer located between the array substrate and the color film substrate;
the display panel further comprises a first display area and a second display area at least partially surrounding the first display area;
the first display area is provided with a plurality of protruding parts, the first display area comprises a plurality of sub-pixel units which are arranged in an array mode, the first display area is vertical to the display panel, and the projections of the protruding parts are overlapped with the sub-pixel units;
the projection part is provided with a first side edge and a second side edge which are oppositely arranged, and the plane of the first side edge and the plane of the second side edge are intersected with the plane of the display panel;
the sub-pixel unit further comprises a first driving electrode and a second driving electrode, the first driving electrode and the second driving electrode are perpendicular to the display panel, the projection of the first driving electrode at least covers the projection of the first side edge of the protruding portion, the projection of the second driving electrode at least covers the projection of the second side edge of the strip-shaped protruding portion, and the projections of the first driving electrode and the second driving electrode are not overlapped;
in the sub-pixel unit, the first driving electrodes and the second driving electrodes are alternately arranged.
In a second aspect, the present application provides a display device including the display panel provided by the present application.
Compared with the prior art, the display panel and the display device provided by the invention at least realize the following beneficial effects:
according to the display panel and the display device provided by the application, the driving mode of IPS (In Plane Switching) or FFS (Fringe Field Switching) is changed, and under the IPS or FFS driving mode, a Fringe electric Field is generated between the pixel electrode and the common electrode, and the electric Field comprises horizontal electric Field components and vertical electric Field components, so that the electric Field strength above the pixel electrode and between the pixel electrodes is inconsistent, the deflection degree of liquid crystal is inconsistent, and the transmittance is different; in the invention, a projection is arranged in a first display area, the first display area comprises a plurality of sub-pixel units, in the direction perpendicular to a display panel, the projection of the projection is overlapped with the sub-pixel units, the projection is provided with a first side edge and a second side edge, a first driving electrode is arranged on the first side edge, a second driving electrode is arranged on the second side edge, in the same sub-pixel unit, the first driving electrode and the second driving electrode are alternately arranged, when different potential signals are applied to the first driving electrode and the second driving electrode, a horizontal electric field can be formed between the first driving electrode and the second driving electrode, in the driving mode, the first display area can display images, the rotation amplitude of liquid crystal molecules in the first display area is more consistent, so that the transmittance of the first display area is more uniform, and the transmittance of the first display area is higher than that in the driving mode of the first display area in an IPS or FFS mode, so that the brightness of the first display area can be improved in the display mode, and the light intensity imaging effect of the first display area can be improved; in addition, in the IPS and FFS driving modes, liquid crystal molecules are simultaneously acted by a horizontal electric field and a vertical electric field which are generated between a pixel electrode and a common electrode to generate obvious periodic inclined and twisted arrangement, and light is diffracted through the periodic arrangement of the liquid crystal deflection to reduce the imaging effect of the light sensing element.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced, the drawings described herein are provided to provide further understanding of the present invention and constitute a part of the present invention, and the exemplary embodiments and descriptions thereof of the present invention are used for explaining the present invention and do not constitute a limitation to the present invention.
FIG. 1 is a schematic cross-sectional view of a display panel under deflection of a liquid crystal according to a conventional design;
fig. 2 is a schematic top view of a display panel according to an embodiment of the present invention;
FIG. 3 is a partially enlarged view of a first display region of the display panel of FIG. 2;
FIG. 4 isbase:Sub>A cross-sectional view taken along line A-A' of FIG. 3;
FIG. 5 is another enlarged partial view of the first display region of the display panel of FIG. 2;
FIG. 6 is a schematic cross-sectional view taken along line B-B' of FIG. 5;
FIG. 7 is a schematic enlarged view of a portion of the first display region of the display panel of FIG. 2;
FIG. 8 is a schematic enlarged partial view of a first display region of the display panel of FIG. 2;
FIG. 9 is a schematic cross-sectional view taken along section line C-C' of FIG. 8;
FIG. 10 is a schematic diagram of a partial enlarged view of the first display region of the display panel of FIG. 2;
FIG. 11 is another schematic cross-sectional view taken along section line D-D' of FIG. 10;
FIG. 12 is a schematic enlarged view of a portion of the first display area of the display panel of FIG. 2;
FIG. 13 is a schematic cross-sectional view taken along section line D1-D1' of FIG. 12;
FIG. 14 is a schematic diagram of a partial enlarged view of the first display region of the display panel of FIG. 2;
FIG. 15 is a schematic cross-sectional view taken along section line E-E' of FIG. 14;
FIG. 16 is a schematic diagram of a partial enlarged view of the first display region of the display panel of FIG. 2;
FIG. 17 is a schematic cross-sectional view taken along section line F-F' of FIG. 16;
FIG. 18 is a schematic enlarged view of a portion of the first display area of the display panel of FIG. 2;
FIG. 19 isbase:Sub>A further cross-sectional view taken along line A-A' of FIG. 3;
FIG. 20 is a further cross-sectional view taken along line B-B' of FIG. 5;
fig. 21 is a schematic top view of a display device according to an embodiment of the disclosure.
Detailed Description
The embodiments of the present invention will be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to FIG. 1, FIG. 1 is a schematic cross-sectional view of a prior art liquid crystal display panel under deflection; in fig. 1, a display panel 1 provided by the conventional design includes an array substrate 11 and a color filter substrate 12 that are oppositely disposed, and a liquid crystal layer 13 that is located between the array substrate 11 and the color filter substrate 12, wherein a pixel electrode 112 and a common electrode 111 are disposed on the array substrate 11, the pixel electrode 112 is located on a side of the common electrode 111 facing the liquid crystal layer 13, the pixel electrode 112 and the common electrode 111 are arranged along a third direction Z, the third direction Z is a direction perpendicular to the display panel 1, an FFS driving mode is formed between the pixel electrode 112 and the common electrode 111 for the liquid crystal layer 13, that is, a driving electric field E has two components, one is a third direction (vertical direction) component Ez, and the other is a horizontal direction component, where the horizontal direction is parallel to a plane of the display panel 1, and is represented by a first direction component Ex, wherein the first direction X is an arrangement direction of the pixel electrodes 112 on the display panel 1 and is also an extension direction of scanning lines on the display panel, under the combined action of the two driving electric fields E, liquid crystal molecules in the liquid crystal layer 13 form different deflection states at different positions inside the display panel, when viewed from a pointing direction of the driving electric field E in fig. 1, when the driving electric field E has a component in a third direction Z, the liquid crystal molecules tilt, the tilt angle is represented by an included angle a formed between an extension direction of a normal optical axis dc of the liquid crystal molecules and the first direction X, at a start end E0 and a tail end E1 of the electric field E, because the component in the third direction Z is large, the tilt angle a of the liquid crystal molecules is also large, and the tilted liquid crystal molecules are arranged in an almost mirror image relative to a middle part of the driving electric field E; in addition to the tilt of the liquid crystal molecules, the liquid crystal molecules may also be twisted to different degrees due to the strength change of the electric field in the horizontal direction, and these different deflection states are arranged in almost a mirror image with respect to the middle of the driving electric field E, when a pixel unit has a plurality of pixel electrodes 112, as shown in fig. 1, a pixel unit has two pixel electrodes 112, and the driving electric field formed between the two pixel electrodes 112 and the common electrode 111 causes the liquid crystal molecules in the liquid crystal layer 13 to form a periodic deflection distribution in the pixel unit, when light is taken into the display panel from the backlight and passes through the liquid crystal layer 13, it is equivalent to enter a liquid crystal grating formed by the periodically deflected liquid crystal molecules, since the sub-pixel units included in the display panel are arranged in an array, a diffraction phenomenon occurs when light passes through the sub-pixel units, and the periodic liquid crystal grating in the sub-pixel units increases the diffraction degree of light, so that more obvious diffraction spots occur in the image, and the image quality is reduced. The electric field intensity above the pixel electrode 112 and between the pixel electrodes 112 is inconsistent, which causes inconsistent deflection degree of liquid crystal, thereby causing difference of transmittance in pixel units; in the existing design, an IPS driving mode also exists, where projections of the pixel electrodes 112 and the common electrodes 111 in a direction perpendicular to the display panel are alternately arranged, and an electric field formed between the two electrodes also has components in the horizontal direction and the third direction Z, and still has a relatively severe diffraction phenomenon.
In view of the above-mentioned problems, the present invention providesbase:Sub>A display panel, as shown in fig. 2-4, fig. 2 isbase:Sub>A schematic top view ofbase:Sub>A display panel according to an embodiment of the present invention, fig. 3 isbase:Sub>A schematic partially enlarged view ofbase:Sub>A first display region of the display panel of fig. 2, and fig. 4 isbase:Sub>A schematic cross-sectional view alongbase:Sub>A sectional linebase:Sub>A-base:Sub>A' of fig. 3; as shown in fig. 2, the display panel 2 includes a first display area 200 and a second display area 201 at least partially surrounding the first display area 200, fig. 2 only illustrates the first display area 200 with a rectangular shape, and does not limit the shape of the first display area 200, in some other embodiments of the present invention, the first display area 200 may also be embodied with other shapes, such as a rounded rectangle, a circle, an ellipse, and the like, which is not specifically limited by the present invention. As shown in fig. 3 to 4, the display panel 2 includes an array substrate 21 and a color filter substrate 22 which are oppositely disposed, and a liquid crystal layer 25 located between the array substrate 21 and the color filter substrate 22.
In the first display area 200, a plurality of protrusions 23 and a plurality of sub-pixel units P are disposed, and in a direction perpendicular to the display panel 2, a projection of the protrusion 23 overlaps the sub-pixel units P, as shown in fig. 3 to 4, the protrusion 231 may be completely located within the sub-pixel unit P, and the protrusion 232 may also be partially located within the sub-pixel unit P, i.e., between two adjacent pixel units P in the same row.
The first side edge B1 and the second side edge B2 which are oppositely arranged are arranged on one protruding portion 23, the plane where the first side edge B1 is located and the plane where the second side edge B2 is located are intersected with the plane where the display panel 2 is located, that is, the planes where the first side edge B1 and the second side edge B2 of the protruding portion 23 are located can be at a certain inclination angle with the plane where the display panel 2 is located, and can also be perpendicular to the plane where the display panel 2 is located.
In the sub-pixel unit P, a first driving electrode 241 and a second driving electrode 242 are included, in a direction perpendicular to the display panel 2, a projection of the first driving electrode 241 at least covers a projection of the first side B1 of the protruding portion 23, and a projection of the second driving electrode 242 at least covers a projection of the second side B2 of the protruding portion 23; the first driving electrode 241 may be disposed only on the surface of the first side B1 of the protrusion 23, or may be disposed on a portion of the surface S1 of the protrusion 23 facing the liquid crystal layer 25, a portion of the surface S2 of the material between the first side B1 and two adjacent protrusions 23, and similarly, the disposing region of the second driving electrode 242 may be disposed in the same manner as the first driving electrode 241, and the disposing region of the second driving electrode 242 may be identical to or different from the first driving electrode 241 when the above conditions are satisfied, where this is not required, and may be selected according to the adhesion between the electrode material and the protrusion 23, if the adhesion between the two is good, the driving electrode 24 may be disposed only on the side of the protrusion 23, and if the adhesion between the two is poor, the driving electrode 24 may increase the disposing area, thereby increasing the adhesion between the protrusion 23, and an interlayer may be disposed on the protrusion 23 and between the driving electrode 24, thereby increasing the adhesion of the driving electrode 24; in the direction perpendicular to the display panel 2, the projections of the first driving electrode 241 and the second driving electrode 242 do not overlap, and the first driving electrode 241 and the second driving electrode 242 are alternately arranged in the sub-pixel unit P.
It should be noted that, when the protruding portion 232 is located in the sub-pixel unit P, the driving electrode 24 on the protruding portion 23 is made of a transparent material, such as ITO (Indium Tin Oxide), so as to ensure that light transmitted through the sub-pixel unit P is not blocked; when the protruding portion 231 is located between two adjacent sub-pixel units P, the driving electrode 24 on the protruding portion 23 can be made of a transparent material or a metal material, because a black matrix is usually disposed between two adjacent sub-pixel units P for shielding, and this area is usually opaque.
Optionally, directions of the protrusions 23 in any two sub-pixel units P may be the same or different, so that only the first driving electrode 241 and the second driving electrode 242 of the same sub-pixel unit P are defined to be alternately arranged, at this time, most of the electric fields in the sub-pixel unit P in the third direction Z are the horizontal electric fields E 'generated between the first driving electrode 241 and the second driving electrode 242, and the electric fields in the third direction Z are very weak, most of the liquid crystal molecules are affected by the horizontal electric fields E' to deflect, and the deflection degrees are relatively consistent, and a periodic inclined and twisted arrangement does not occur, so that a phenomenon that light transmitted through the display panel is diffracted is greatly improved; in addition, under this drive mode, first display interval still can show the image, the liquid crystal molecule rotation range of first display interval is more unanimous, thereby the transmissivity of first display interval is more even, and the transmissivity of first display interval compares first display interval and wants the high in the drive mode of IPS or FFS under the transmissivity, not only can promote under the display mode, the luminance of first display interval, can also be under the mode of shooing, increase the transmissivity of first display interval, the improvement gets into the light inlet volume that sets up in first display interval, thereby improve the formation of image effect of light sensing element.
Alternatively, as shown in fig. 5 to 6, fig. 5 is another partially enlarged schematic view of the first display region of the display panel of fig. 2, and fig. 6 is a schematic cross-sectional view taken along a cross-sectional line B-B' of fig. 5; in fig. 5, the sub-pixel unit P includes an opening area OA and a non-opening area NA, where the non-opening area NA refers to a portion of the sub-pixel unit P except the opening area OA, the protrusion 23 is located in the non-opening area NA, the non-opening area NA usually has a light blocking layer to block light in the display panel 2, and the opening area OA is used to transmit light, and the protrusion 23 is located in the non-opening area NA to ensure uniform light transmission in the opening area and uniform display brightness of the sub-pixel unit.
When the protrusion 23 is located at the non-opening area NA, the voltage applied to the first driving electrode 241 on the protrusion 23 is V1, and the voltage applied to the second driving electrode 242 is V2, the voltage difference between the voltages V1 and V2 is Δ V,8V ≦ Δ V ≦ 40V, when the voltage difference Δ V between the two driving electrodes 24 reaches 8V, the electric field generated between the two driving electrodes 24 may drive the liquid crystal molecules in the area of about 5 μm along the first direction X, and when the voltage difference Δ V between the two driving electrodes 24 reaches 40V, the electric field generated between the two driving electrodes 24 may drive the liquid crystal molecules in the area of about 30 μm along the first direction X, and because the size of the sub-pixel cell P along the first direction X is generally 10 to 35 μm, which includes the size of the opening area OA and the non-opening area NA along the first direction X, the size of the non-opening area NA along the first direction NA is removed, the size of the opening area OA along the first direction is about 5 to 30 μm, and if the size of the voltage difference between the two driving electrodes NA along the first direction X is large enough to deflect the liquid crystal molecules, the transmittance of the liquid crystal area OA is insufficient, thereby causing the liquid crystal molecules to be deflected; when the voltage difference Δ V between the two driving electrodes 24 satisfies 8V ≤ Δ V ≤ 40V, the voltage difference Δ V between the voltages V1 and V2 is adjusted according to the size of the sub-pixel unit P in the first direction X, such that the liquid crystal molecules are sufficiently deflected and the light transmittance of the opening region is maximized.
Optionally, with reference to fig. 5, the vertical distance between the first side B1 and the second side B2 of two adjacent protruding portions 23 is D, D is greater than or equal to 5 μm and less than or equal to 30 μm, when the first driving electrode 241 and the second driving electrode 242 are located in the non-opening area NA of the sub-pixel unit P, and the driving voltage difference Δ V between the first driving electrode 241 and the second driving electrode 242 is greater than or equal to 8V and less than or equal to Δ V and less than or equal to 40V, the driving voltage difference can drive the OA liquid crystal molecules in the opening area to deflect within a range of 5-30 μm.
Optionally, referring to fig. 3 and fig. 7, fig. 7 is a schematic partial enlarged view of the first display area of the display panel of fig. 2; the display panel 2 is further provided with a scanning line 26, an extending direction of the scanning line 26 is a first direction X, an included angle between an extending direction T of the protruding portion 23 and the first direction X is θ,0 ° < θ < 90 °, as shown in fig. 3, an included angle between the extending direction T of the protruding portion 23 and the first direction X is 10 °, as shown in fig. 7, an included angle between the extending direction T of the protruding portion 23 and the first direction X is 3 °; since the liquid crystal alignment direction of the display panel is usually the extending direction of the scan lines 26, or perpendicular to the scan lines 26, that is, the alignment direction is the first direction X or the second direction Y, the extending direction of the protrusions 23 is prevented from being parallel to the first direction X and the second direction Y, that is, the extending direction of the driving electrodes 24 on the protrusions 23 is prevented from being parallel to the first direction X and the second direction Y, so as to prevent the electric field E between the driving electrodes from being parallel to or perpendicular to the alignment direction, thereby preventing the liquid crystal molecules from being hindered from deflecting.
Alternatively, under the condition that the extending directions of the protruding portions 23 satisfy a certain condition, the extending directions T of the protruding portions 23 on the display panel 2 are parallel, that is, the extending directions T of the protruding portions 23 on the display panel 2 are all the same, as shown in fig. 3 and 7, and the extending directions T of the protruding portions 23 are all along the same direction, through the uniform design of the protruding portions 23, the display of the display panel 2 can be uniform, and the preparation of the protruding portions 23 and the driving electrodes 24 is also facilitated.
Optionally, referring to fig. 3 and fig. 7, the display panel 2 is further provided with a data line 27, an included angle between the data line 27 and the extending direction of the scan line 26 is phi, where 0 ° < phi < 90 °, in fig. 3, the extending direction T of the protruding portion 23 is the same as the extending direction of the data line 27, and in fig. 7, the extending direction T of the protruding portion 23 is different from the extending direction of the data line 27; the extending direction T of the protruding portion 23 is the same as the extending direction of the data line 27, so that the area of the non-display area NA of the sub-pixel unit P is relatively small, and the sub-pixel unit P has a large aperture ratio, thereby ensuring the transmittance of the display panel 2 and the brightness of the display panel 2.
Alternatively, as shown in fig. 8 to 9, fig. 8 is a further enlarged partial schematic view of the first display region of the display panel of fig. 2, and fig. 9 is a schematic cross-sectional view taken along the sectional line C-C' of fig. 8; the sub-pixel units P in the first display area 200 further include a common electrode 28, the common electrode 28 is located on a side of the first driving electrode 241 and the second driving electrode 242 away from the liquid crystal layer 25, a horizontal electric field E ' is formed between the first driving electrode 241 and the second driving electrode 242, and meanwhile, a fringe electric field Ef, i.e., an FFS mode driving electric field, is formed between the first driving electrode 241, the second driving electrode 242 and the common electrode 28, the increased FFS mode driving electric field Ef has a weaker strength than the horizontal electric field E ', and has a weaker influence on liquid crystal deflection than the horizontal electric field E ', but the increased driving electric field can increase the light transmittance of the opening area OA, thereby increasing the brightness of the display panel 2.
Alternatively, as shown in fig. 8 to 11, fig. 10 is a further enlarged partial schematic view of the first display region of the display panel of fig. 2, and fig. 11 is another schematic cross-sectional view taken along the sectional line D-D' of fig. 10; in fig. 8 to 9, the common electrode 28 is located on the side of the protrusion portion 23 away from the liquid crystal layer 13, while in fig. 10 to 11, the common electrode 28 is located on the side of the protrusion portion 23 facing the liquid crystal layer 13, and the common electrode 28 is located between the protrusion portion 23 and the first and second driving electrodes 241 and 242, the strength of the fringe electric field Ef formed between the first and second driving electrodes 241 and 242 and the common electrode 28 can be increased appropriately, so as to increase the light transmittance of the opening area OA, thereby increasing the brightness of the display panel 2.
Alternatively, as shown in fig. 10 to 13, fig. 12 is a further partial enlarged schematic view of the first display region of the display panel of fig. 2, and fig. 13 is a schematic cross-sectional view taken along the cross-sectional line D1-D1' in fig. 12; when the common electrode 28 is located between the protrusion 23 and the first and second driving electrodes 241, 242, the orthogonal projection of the common electrode 28 on the display panel 2 at least covers the orthogonal projection of the first and second sides B1, B2 of the protrusion 23 on the display panel 2, that is, the common electrode 28 may be only disposed on the first and second sides B1, B2 of the protrusion 23, or as shown in fig. 10 to 11, the orthogonal projection of the common electrode 28 on the display panel 2 covers the surface S1 of the protrusion 23 facing the liquid crystal layer 13, and the orthogonal projection of the first and second sides B1, B2 on the display panel 2 even covers the material surface S2 between two adjacent protrusions 23; as shown in fig. 12 to 13, the orthogonal projection of the common electrode 28 on the display panel 2 may cover a part of the surface S1 of the convex portion 23 facing the liquid crystal layer 13, the orthogonal projections of the first side B1 and the second side B2 on the display panel 2, and the material surface S2 between the two convex portions 23; since the orthographic projections of the first driving electrode 241 and the second driving electrode 242 on the display panel 2 at least cover the orthographic projections of the first side B1 and the second side B2 of the protruding portion 23 on the display panel 2, it is only necessary to ensure that the driving electrode 24 and the orthographic projection of the common electrode 28 on the display panel 2 overlap, and it is ensured that the sub-pixel unit P in the first display area 200 has an effective FFS driving electric field, so that the light transmittance of the opening area OA can be increased, and the brightness of the display panel 2 can be increased.
As described above, with continued reference to fig. 12 to 13, when the common electrode 28 is located between the protrusion 23 and the first and second driving electrodes 241 and 242, and the angle between the extending direction T of the protrusion 23 and the extending direction of the scan line 26 is θ,0 ° < θ < 90 °, optionally, the common electrode 28 has a cut F on the first surface S1 of the protrusion 23, where the first surface S1 is the surface of the protrusion facing the liquid crystal layer, that is, the common electrode 28 does not completely cover the first surface S1 of the protrusion 23, but is broken on the first surface S1, and the extending direction of the cut F also coincides with the extending direction T of the protrusion 23, and a gap is etched in the common electrode 28 on the first surface S1 of the protrusion 23, and the extending direction of the cut F coincides with the protrusion 23, so that the occurrence of irregularities on the surface S1 of the protrusion 23 when the height of the protrusion 23 in the vertical display region 200 is ensured to have an effective FFS driving electric field can be avoided, and the unevenness of the surface S23 of the protrusion 23 can be avoided.
Alternatively, in the extending direction of the vertical slit F, that is, the extending direction T of the protruding portion 23, the slit F has a third side b3 and a fourth side b4 oppositely arranged, and then in the direction of the vertical display panel 2, the vertical distance between the third side b3 and the projection of the first side b1 of the first driving electrode 241 is g1, and the vertical distance between the fourth side b4 and the projection of the second side b2 of the second driving electrode 242 is g2, then g1 is 0 ≦ g1 ≦ 1 μm, and g2 is 0 ≦ g2 ≦ 1 μm. As shown in fig. 12, the third side b3 of the notch F is located at the right side of the first side b1 of the first driving electrode 241, the fourth side b4 of the notch F is located at the left side of the second side b2 of the second driving electrode 242, that is, the common electrode 28 is extended by a certain distance from the driving electrode 24, and in another case, the third side b3 of the notch F is located at the left side of the first side b1 of the first driving electrode 241, and the fourth side b4 of the notch F is located at the right side of the second side b2 of the second driving electrode 242, that is, the common electrode 28 is retracted by a certain distance from the driving electrode 24, because in practice, when the third side b3 and the fourth side b4 of the notch F where the common electrode 28 is located are flush with the first side b1 of the first driving electrode 241 and the second side b2 of the second driving electrode 242, there is an alignment deviation between the film layers during the manufacturing process, which results in a misalignment between the driving electrode 24 and the common electrode 28, and the deviation is in the range of 0 μm to 1 μm.
Alternatively, as shown in fig. 14 to 15, fig. 14 is a further enlarged partial schematic view of the first display region of the display panel of fig. 2, and fig. 15 is a schematic cross-sectional view taken along the sectional line E-E' of fig. 14; the sub-pixel unit P of the first display area 200 includes the opening area OA and the non-opening area NA, and the orthographic projection of the common electrode 28 on the display panel 2 does not overlap the opening area OA, that is, there is no common electrode 28 in the opening area OA of the sub-pixel unit P of the first display area 200, and there is no common electrode 28 in the opening area OA of the sub-pixel unit P, so that the light passing through the opening area OA does not pass through the common electrode 28, thereby improving the light transmittance of the opening area OA and increasing the brightness of the display panel 2.
Optionally, the display panel 2 includes a passivation layer, and the protruding portion 23 is formed by the passivation layer, where the passivation layer may include an insulating layer, a planarization layer, and the like, and the material may be an inorganic material such as SiO/SiN, and may also be an organic material, which is not limited in this application.
Alternatively, as shown in fig. 5 to 6, the protrusion 23 may be located on one side of the array substrate 21, and when the protrusion 23 is located on one side of the array substrate 21, as shown in fig. 16 to 17, fig. 16 is a further enlarged partial schematic view of the first display region of the display panel of fig. 2, and fig. 17 is a schematic cross-sectional view along a cross-sectional line F-F' in fig. 16; the sub-pixel units P of the first display region 200 include a thin film transistor Tp, the thin film transistor Tp includes a gate T1, a source T2 and a drain T3, the first driving electrode 241 is electrically connected to the drain T3 through the first via hole K1, when the thin film transistor Tp is turned on, a data signal is transmitted from the source T2 to the drain T3 and then to the first driving electrode 241, and the data signal is transmitted to the first driving electrode 241 by controlling the thin film transistor Tp, so that each sub-pixel unit P can be effectively controlled to realize display of different gray-scale brightness.
Optionally, with reference to fig. 16 to 17, the display panel 2 includes a driving signal line (not shown in the drawings), the driving signal line is connected to a driving signal, the second driving electrode 242 is electrically connected to the driving signal line through the second via hole K2, the driving signal may be a fixed signal, the driving signal is transmitted to the second driving electrode 242 through the driving signal line, the driving signal line may be disposed on the same layer as the data line 27, or on the same layer as the scan line 26, or on the same layer as the light-shielding metal layer (not shown in the drawings), and the application of the present invention is not limited. When the sub-pixel unit P needs to be turned on, different voltages are respectively applied to the first driving electrode 241 and the second driving electrode 242, so that a voltage difference is formed between the two, and the liquid crystal molecules are deflected; when the sub-pixel unit P does not need to be lit, the first driving electrode 241 and the second driving electrode 242 apply the same voltage, so that no voltage difference is formed between the two, and the liquid crystal molecules are not deflected.
Alternatively, as shown in fig. 18, fig. 18 is a further partial enlarged schematic view of the first display region of the display panel of fig. 2, the sub-pixel P of the first display region 200 includes two thin film transistors Tp1 and Tp2, the thin film transistor Tp1 includes a gate T11, a source T12 and a drain T13, the thin film transistor Tp2 includes a gate T21, a source T22 and a drain T23, the first driving electrode 241 is electrically connected to the drain T13 through a first via K1, the second driving electrode 242 is electrically connected to the drain T23 through a second via K2, when the thin film transistor Tp1 is turned on, the first data signal is transferred from the source T12 to the drain T13 and then to the first driving electrode 241, when the thin film transistor Tp2 is turned on, the second data signal is transferred from the source T22 to the drain T23 and then to the second driving electrode 242, and by controlling the thin film transistors Tp1 and Tp2, different data signals are transferred to the first driving electrode 241 and the second driving electrode 241, respectively, so that the luminance of the sub-pixel P can be more uniformly controlled, and the sub-pixel P can display luminance of the sub-display panel can be more uniformly displayed, and the sub-display panel can be more accurately realized.
Alternatively, as shown in fig. 19 and fig. 19 are still another schematic cross-sectional view taken along the cross-sectional linebase:Sub>A-base:Sub>A' in fig. 3, the protruding portion 23 may be located on one side of the color filter substrate 22, when the protruding portion 23 is located on one side of the color filter substrate 22, the first driving electrode 241 and the second driving electrode 242 are also located on one side of the color filter substrate 22, and then driving signal lines need to be added on one side of the color filter substrate 22, the first driving electrode 241 and the second driving electrode 242 may be electrically connected to different driving signal lines through different via holes, respectively, the drain of the thin film transistor of the array substrate 21 is provided withbase:Sub>A drain signal line, and inbase:Sub>A frame area of the display panel 2, the driving signal line is further electrically connected to the drain signal line of the thin film transistor of the array substrate 21, for example, the driving signal line may be electrically connected through different gold balls in the frame area, or one of the driving signal lines may be directly electrically connected to the driving signal of the display panel 2. Optionally, the protruding portions 23 may also be simultaneously located on the array substrate 21 and the color filter substrate 22, and the protruding portions 23 on the two substrates are orthographically overlapped on the display panel 2.
As described above, referring to fig. 5 to 6, the display panel 2 includes the array substrate 21 and the color filter substrate 22 which are oppositely disposed, in a direction perpendicular to the display panel 2, a distance between the array substrate 21 and the color filter substrate 22 is H1, a height of the protruding portion 23 is H, where H1 is a box thickness of the display panel 2, H is greater than or equal to 0.3 μm and less than or equal to H1, that is, the height of the protruding portion 23 is at least 0.3 μm and cannot exceed the box thickness of the display panel 2, and the protruding portion 23 must have a certain height, so that a stable horizontal electric field E' can be formed between the first driving electrode 241 and the second driving electrode 242, the higher the height H of the protruding portion 23 in a set range is, the greater the electric field strength between the array substrate 21 and the color filter substrate 22 is, and the distribution in space is more balanced, so that the rotation of the liquid crystal molecules 25 in the pixel unit is more uniform, the transmittance is more uniform, but the protruding portion 23 cannot exceed the box thickness of the display panel 2, otherwise the array substrate 21 and the color filter substrate 22 cannot be bonded normally.
When the height H of the bump 23 is H1, that is, the height of the bump 23 is the box thickness of the display panel 2, the support pillars 29 do not need to be prepared on one side of the array substrate 21 or the color filter substrate 22, when the height H of the bump 23 is less than H1, that is, the height of the bump 23 is less than the box thickness of the display panel 2, the support pillars 29 need to be prepared on the opposite side of the bump 23, and the orthographic projection of the support pillars 29 on the display panel 2 at least overlaps the orthographic projection of the bump 23 on the display panel 2, that is, the support pillars 29 and the bump 23 interact to support the display panel 2, the height of the support pillars 29 is H2, and the total thickness of the electrodes on the bump 23 is H3, then H2= H1-H3, if the bump 23 is located on the array substrate 21, the color filter substrate 22 side is provided with the support pillars 29, if the bump 23 is located on the color filter substrate 22, then the array substrate 21 side is provided with the support pillars 29, and the support pillars 29 can be made of a metal material, an organic material or an inorganic material.
Optionally, with continued reference to fig. 5, the width of the protruding portion 23 in the direction perpendicular to the extending direction T is W, W is 2 μm ≦ 9 μm, the length of the protruding portion 23 in the extending direction is L, L is 30 μm ≦ 85 μm; in the process, the width W of the protruding portion 23 in the direction perpendicular to the extending direction T thereof, i.e. the limit width of the line width of the protruding portion 23 is 2 μm, because the width W is less than 2 μm, the phenomenon of disconnection of the protruding portion 23 and non-uniform line width may occur in the process; the line width of the protruding portion 23 is set to be less than or equal to 9 μm, in order to ensure that the protruding portion 23 has enough distribution quantity in the first display region 200, thereby ensuring the intensity of the horizontal electric field and ensuring the brightness of the display panel 2; similarly, the sub-pixel unit P has a dimension along the first direction X of usually 10 to 35 μm and a dimension along the extending direction thereof of usually 30 to 85 μm, and the length L of each of the protrusions 23 in the extending direction T is also 30 to 85 μm.
Optionally, referring to fig. 3 to 4, on the same protrusion 23, in the extending direction T of the vertical protrusion 23, the first driving electrode 241 has a first side b1, the second driving electrode 242 has a second side b2, and the first side b1 and the second side b2 are adjacent, the vertical distance between the first side b1 and the second side b2 is G, and G is greater than or equal to 2 μm and less than or equal to 4.5 μm; because the orthographic projections of the first driving electrode 241 and the second driving electrode 242 on the display panel 2 do not overlap, in the process, the limit width of the gap between the driving electrodes 24 is set to 2 μm, which can ensure that no short circuit occurs between the driving electrodes 24, and because the width W of the protruding portion 23 in the direction perpendicular to the extending direction T, that is, the line width is 9 μm at most and the gap between the driving electrodes 24 is 4.5 μm at most, which can ensure that the orthographic projections of the first driving electrode 241 and the second driving electrode 242 on the display panel 2 cover at least half of the first surface S1 of the protruding portion 23, thereby ensuring that the driving electrode 24 and the protruding portion 23 have better adhesion.
Alternatively, as shown in fig. 20, fig. 20 is another schematic cross-sectional view taken along the cross-sectional line B-B' in fig. 5, the sub-pixel unit P in the first display area 200 includes a color sub-pixel unit P1 and a high-transmittance sub-pixel unit P2, wherein the color sub-pixel unit P1 may include a red sub-pixel unit, a green sub-pixel unit and a blue sub-pixel unit, and the high-transmittance sub-pixel unit P2 may include a white sub-pixel unit or a yellow sub-pixel unit. The electrode structure proposed in the present application can be applied only to the high-transmittance color sub-pixel unit P2, or to the color sub-pixel unit P1 and the high-transmittance sub-pixel unit P2.
As shown in fig. 21, fig. 21 is a schematic top view of a display device according to an embodiment of the disclosure; an embodiment of the present invention further provides a display device 3, where the display device 3 includes a display terminal product such as a smart phone, a flat panel display device, a notebook display device, and a vehicle-mounted display device, and the display device 3 includes the display panel 2, and further includes an imaging device (not shown in the figure), where the orthographic projection of the imaging device on the display panel 2 is overlapped with the first display area 200, and beneficial effects produced by the display device 3 are as described in the foregoing embodiment, and are not described herein again.
In summary, in the display panel and the display device provided by the present invention, the protrusion is disposed in the first display area, the first display area includes a plurality of sub-pixel units, in a direction perpendicular to the display panel, a projection of the protrusion overlaps the sub-pixel units, the protrusion has a first side and a second side, the first side is disposed with the first driving electrode, and the second side is disposed with the second driving electrode, in the same sub-pixel unit, the first driving electrode and the second driving electrode are alternately disposed, so that when different electric potential signals are applied to the first driving electrode and the second driving electrode, a horizontal electric field is formed between the first driving electrode and the second driving electrode, so that liquid crystal molecules in the liquid crystal layer rotate in the horizontal electric field, thereby preventing the liquid crystal molecules from generating obvious periodic tilt and twist arrangement in the IPS or FFS driving mode, and greatly reducing diffraction phenomenon generated by the periodic arrangement of light through liquid crystal deflection, thereby improving the imaging effect.
The foregoing description shows and describes several preferred embodiments of the present application, but as aforementioned, it is to be understood that the application is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the application, which is to be protected by the claims appended hereto.
Claims (21)
1. A display panel, comprising:
the liquid crystal display panel comprises an array substrate, a color film substrate and a liquid crystal layer, wherein the array substrate and the color film substrate are oppositely arranged, and the liquid crystal layer is positioned between the array substrate and the color film substrate;
the display device comprises a first display area and a second display area at least partially surrounding the first display area, wherein the area where the first display area is located is used for arranging a light sensing element;
the first display area is provided with a plurality of convex parts, the first display area comprises a plurality of sub-pixel units which are arranged in an array mode, the first display area is vertical to the display panel, and the projections of the convex parts are overlapped with the sub-pixel units;
the projection part is provided with a first side edge and a second side edge which are oppositely arranged, and the plane where the first side edge and the second side edge are located is intersected with the plane where the display panel is located;
the sub-pixel unit further comprises a first driving electrode and a second driving electrode, the first driving electrode and the second driving electrode are perpendicular to the display panel, the projection of the first driving electrode at least covers the projection of the first side edge of the convex part, the projection of the second driving electrode at least covers the projection of the second side edge of the convex part, and the projections of the first driving electrode and the second driving electrode are not overlapped;
in the sub-pixel unit, the first driving electrodes and the second driving electrodes are alternately arranged;
the display panel is provided with a scanning line, an included angle between the extending direction of the protruding portion and the extending direction of the scanning line is theta, and theta is larger than 0 degree and smaller than 90 degrees.
2. The display panel according to claim 1, wherein the sub-pixel unit includes an open area and a non-open area, and the protrusion portion is located in the non-open area.
3. The display panel of claim 2, wherein the voltage difference between the voltages received by the first driving electrode and the second driving electrode is Δ V,8V ≦ Δ V ≦ 40V.
4. The display panel according to claim 3, wherein a perpendicular distance between the first side and the second side of two adjacent convex portions is D, and D is greater than or equal to 5 μm and less than or equal to 30 μm.
5. The display panel according to claim 1, wherein the extending directions of the convex portions are parallel.
6. The display panel according to claim 5, wherein the display panel is provided with data lines, and when an angle between an extending direction of the data lines and an extending direction of the scan lines is φ,0 ° < φ < 90 °, an extending direction of each of the convex portions coincides with an extending direction of the data lines.
7. The display panel according to claim 1, wherein the sub-pixel unit further comprises a common electrode on a side of the first and second driving electrodes facing away from the liquid crystal layer.
8. The display panel according to claim 7, wherein the common electrode is located on a side of the projection portion facing the liquid crystal layer.
9. The display panel according to claim 8, wherein a projection of the common electrode covers at least projections of the first side and the second side of the convex portion, perpendicular to the display panel.
10. The display panel according to claim 9, wherein the protrusion has a first surface, the first surface is a surface of the protrusion facing the liquid crystal layer, the common electrode has a slit perpendicular to the display panel, a projection of the slit overlaps with the first surface, and an extending direction of the slit coincides with an extending direction of the protrusion.
11. The display panel according to claim 10, wherein the first driving electrode has a first edge and the second driving electrode has a second edge, the first edge and the second edge being adjacent to each other, the first edge and the second edge being located on the same protrusion and perpendicular to an extending direction of the protrusion;
the vertical distance between the projection of the third edge and the projection of the first edge of the first driving electrode is g1, the vertical distance between the projection of the fourth edge and the projection of the second edge of the second driving electrode is g2, g1 is larger than or equal to 0 and smaller than or equal to 1 mu m, and g2 is larger than or equal to 0 and smaller than or equal to 1 mu m.
12. The display panel according to claim 7, wherein the sub-pixel unit includes an opening area, and the common electrode does not overlap the opening area in a front projection of the display panel.
13. The display panel according to claim 1, wherein the display panel comprises a passivation layer, and wherein the convex portion is formed of the passivation layer.
14. The display panel of claim 1, wherein the protrusion is located on one side of the array substrate.
15. The display panel according to claim 14, wherein the sub-pixel unit comprises a thin film transistor including a gate electrode, a source electrode, and a drain electrode, and the first driving electrode is electrically connected to the drain electrode through a first via hole.
16. The display panel according to claim 15, wherein the display panel comprises a driving signal line to which a driving signal is connected, and wherein the second driving electrode is electrically connected to the driving signal line through a second via.
17. The display panel according to claim 1, wherein a distance between the array substrate and the color filter substrate is H1, a height of the protrusion on a plane perpendicular to the display panel is H, and H is greater than or equal to 0.3 μm and less than or equal to H1.
18. The display panel according to claim 1, wherein the width of the convex portions in the direction perpendicular to the respective extending directions thereof is W,2 μm W ≦ 9 μm, and the length of the convex portions in the respective extending directions thereof is L,30 μm ≦ L ≦ 85 μm.
19. The display panel according to claim 18, wherein the first driving electrode has a first edge and the second driving electrode has a second edge, the first edge and the second edge are adjacent to each other, and a vertical distance between the first edge and the second edge is G,2 μm G4.5 μm.
20. The display panel according to claim 1, wherein the sub-pixel units comprise color sub-pixel units and high-transmittance sub-pixel units.
21. A display device comprising the display panel according to any one of claims 1 to 20.
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| CN113467137B (en) * | 2021-07-05 | 2023-03-21 | 厦门天马微电子有限公司 | Display panel and display device |
| CN113589606B (en) * | 2021-07-30 | 2023-06-30 | 厦门天马微电子有限公司 | Display panel, driving method and display device |
| CN114935854B (en) * | 2022-05-20 | 2023-09-29 | Tcl华星光电技术有限公司 | Liquid crystal display panel and liquid crystal display device |
| CN115390307B (en) * | 2022-08-31 | 2023-09-19 | 厦门天马微电子有限公司 | Display panel and display device |
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