CN113514993B - Array substrate, display panel and display device - Google Patents

Array substrate, display panel and display device Download PDF

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Publication number
CN113514993B
CN113514993B CN202110426944.5A CN202110426944A CN113514993B CN 113514993 B CN113514993 B CN 113514993B CN 202110426944 A CN202110426944 A CN 202110426944A CN 113514993 B CN113514993 B CN 113514993B
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substrate
metal
array substrate
light
layer
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CN113514993A (en
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陈建群
方丽婷
吴玲
沈柏平
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Xiamen Tianma Microelectronics Co Ltd
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Xiamen Tianma Microelectronics Co Ltd
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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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133512—Light shielding layers, e.g. black matrix
    • 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
    • G02F1/13338—Input devices, e.g. touch panels
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136209—Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
    • H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
    • H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
    • H01L27/124—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
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Abstract

The embodiment of the invention provides an array substrate, a display panel and a display device, wherein the array substrate comprises a substrate and a first metal layer; the first metal layer comprises a plurality of first metal wires extending along a first direction, and the first metal wires comprise a first bottom surface close to one side of the substrate, a first top surface positioned on one side of the first bottom surface far away from the substrate and a first side surface connecting the first bottom surface and the first top surface along the direction of the light emitting surface of the array substrate; the width of orthographic projection of the first top surface on the substrate is larger than that of orthographic projection of the first bottom surface on the substrate along the second direction, and the second direction intersects with the first direction and is parallel to the substrate. The array substrate provided by the embodiment of the invention can improve the metal light leakage phenomenon formed by the high reflectivity of the first side surface on the first metal wire, especially the dark state strabismus light leakage problem under a large visual angle, and improves the visual angle capability of the display device.

Description

Array substrate, display panel and display device
Technical Field
The present invention relates to the field of display technologies, and in particular, to an array substrate, a display panel, and a display device.
Background
With the development of display technology, the application field of display panels with advanced functions is in a diversified development stage, and excellent results are obtained in fields such as digital display, large-size television display, digital products, vehicle-mounted display and the like. In recent years, the development and application of the vehicle-mounted display technology are rapid, and the visual effect requirement of the vehicle-mounted display equipment is also higher and higher. When the display screens are observed in the inclined direction, the special visual angle requirements to be met for the display screens distributed at different positions in the vehicle are different; the design adjustment and polarizer compensation optimization in the box are difficult to simultaneously consider different vehicle-mounted applications or different customer demands, and the problems of multiple customization demands, high cost and the like exist.
When the display device is in a dark state, the liquid crystal is influenced by an irregular electric field or topography, so that the human eyes observe the backlight brightness at certain strabismus positions, namely the dark strabismus light leakage commonly known in the industry. The prior design mainly improves dark state light leakage condition under oblique view by increasing line width of a light shielding layer, but simultaneously restricts resolution and pixel aperture ratio of the display device, and brings about reduction of transmittance; in addition, the line width of the shading layer is increased, so that the solving capability of dark state strabismus light leakage caused by light reflection on the metal surface is insufficient.
Disclosure of Invention
The embodiment of the invention provides an array substrate, a display panel and a display device, which are used for solving the problem of aphonia strabismus light leakage caused by side reflection of metal wires in the existing display panel and display device and improving the visual effect of the display panel.
In a first aspect, an embodiment of the present invention provides an array substrate, where the array substrate includes a substrate and a first metal layer; the first metal layer comprises a plurality of first metal wires extending along a first direction, and the first metal wires comprise a first bottom surface close to one side of the substrate, a first top surface positioned on one side of the first bottom surface far away from the substrate and a first side surface connecting the first bottom surface and the first top surface along the direction of the light emitting surface of the array substrate; the width of orthographic projection of the first top surface on the substrate is larger than that of orthographic projection of the first bottom surface on the substrate along the second direction, and the second direction intersects with the first direction and is parallel to the substrate.
In a second aspect, an embodiment of the present invention provides a display panel, including the array substrate of the first aspect; an opposite substrate disposed opposite to the array substrate; and a liquid crystal layer between the array substrate and the opposite substrate.
In a third aspect, an embodiment of the present invention provides a display device including the above display panel.
The embodiment of the invention provides an array substrate, a display panel and a display device, wherein the array substrate comprises a substrate and a first metal layer; the first metal layer comprises a plurality of first metal wires extending along a first direction, and the first metal wires comprise a first bottom surface close to one side of the substrate, a first top surface positioned on one side of the first bottom surface far away from the substrate and a first side surface connecting the first bottom surface and the first top surface along the direction of the light emitting surface of the array substrate; the width of orthographic projection of the first top surface on the substrate is larger than that of orthographic projection of the first bottom surface on the substrate along the second direction, and the second direction intersects with the first direction and is parallel to the substrate. According to the embodiment of the invention, the cross section width of the first bottom surface of the first metal wire, which is close to one side of the substrate, is smaller than the cross section width of the first top surface, which is far away from one side of the substrate, so that the inclination trend of the first side surface connecting the first bottom surface and the first top surface is towards the direction away from the light emitting surface of the array substrate, when external light irradiates onto the first side surface from the light inlet side, most of reflected light generated on the first side surface is emitted towards the direction away from the light emitting surface of the array substrate, and when the reflected light cannot be emitted from the light emitting surface of the array substrate and is perceived by external human eyes, the dark state strabismus light leakage phenomenon caused by high-reflectivity metal materials on the first side surface is obviously reduced, and the viewing angle capability can be improved; in addition, compared with the scheme of increasing the width of the black matrix in the prior art, the display panel or the display device with the array substrate has higher pixel aperture opening ratio, and the display performance is improved.
Drawings
FIG. 1 is a schematic diagram of a film structure of a display panel in the prior art;
fig. 2 is a schematic top view of an array substrate according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of the structure of FIG. 2 along the direction A-A';
FIG. 4 is an enlarged schematic view of a portion of the structure of Q of FIG. 3;
FIG. 5 is an enlarged schematic view of a further partial structure of Q of FIG. 3;
FIG. 6 is an enlarged schematic view of a further partial structure of Q of FIG. 3;
FIG. 7 is a schematic view of yet another cross-sectional structure taken along the direction A-A' in FIG. 2;
FIG. 8 is a schematic view of still another cross-sectional structure taken along the direction A-A' in FIG. 2;
fig. 9 is a schematic top view of a display panel according to an embodiment of the invention;
FIG. 10 is a schematic view of a cross-sectional structure along the direction C-C' in FIG. 8;
FIG. 11 is a schematic view of a further cross-sectional structure along the direction C-C' in FIG. 8;
fig. 12 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
It should be understood that the described embodiments are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that although the terms first and second may be used to describe the metal layers, the light shielding portions in the embodiments of the present invention, these insulating layers, the light shielding portions should not be limited to these terms. These terms are only used to distinguish the metal layer, the light shielding portion from each other. For example, the first metal layer may also be referred to as a second metal layer, and similarly, the second light shielding portion may also be referred to as a first light shielding portion, without departing from the scope of the embodiments of the present invention.
In the prior art, as shown in fig. 1, the liquid crystal display panel 01 generally includes an array substrate 001 'and a color film substrate 002'; the color film layer 05 'and the light shielding layer 06' are disposed on the color film substrate 002', and the switching device layer 02', the metal wiring 04', etc. are disposed on the array substrate 001'. The metal wiring 04' in the array substrate 001' comprises an upper top surface 041', a lower bottom surface 042' and an inclined side surface 043' connecting the upper top surface 041' and the lower bottom surface 042 '; the upper top surface 041' and the lower bottom surface 042' are generally parallel to the light-emitting surface of the display panel 01, the inclined side surface 043' intersects the light-emitting surface of the display panel 01, the cross-sectional width of the upper top surface 041' is smaller than that of the lower bottom surface 042', and the inclination trend of the inclined side surface 043' connecting the upper top surface 041' and the lower bottom surface 042' extends towards the direction of the light-emitting surface of the array substrate 001 '. That is, in the light emitting direction of the display panel 01, the cross-sectional shape of the etched metal trace 04' in the width direction is "positive trapezoid". The upper and lower surfaces of the liquid crystal display panel 01 are generally provided with upper and lower polarizers (not shown) parallel to the light-exiting surface of the display panel 01; thus, the extending direction of the inclined side 043 'of the metal wiring 04' is intersected with the upper polarizer and the lower polarizer. When the external light GX1 irradiates onto the oblique viewing surface 043 'of the metal trace 04', the external light GX1 is reflected on the oblique side surface 043 'due to the high reflectivity of the metal on the oblique side surface 043' of the metal trace 04', and the propagation direction of the partially reflected light GX2 is directed to the pixel opening region 07'. Under normal conditions, because the filtering directions of the upper polarizer and the lower polarizer are vertical, after the external light GX1 passes through the lower polarizer, the transmitted light is the light vibrating along the same direction, when the display panel is in a dark state picture, the light irradiated to the pixel opening area 07 'is blocked by the upper polarizer and cannot be emitted out of the display panel to be perceived by human eyes, and the light irradiated to the surface of the metal wiring 04' is blocked by the metal wiring, so that brightness cannot be observed at all angles of the display panel. However, if the metal of the oblique side 043 'of the metal wiring 04' has high reflectivity, after part of the external light GX1 passes through the lower polarizer and is reflected on the oblique viewing surface 043', the polarization state of the original incident light GX1 is changed, and the part of the reflected light GX2 cannot be filtered by the upper polarizer in the pixel opening area 07'; particularly, in the prior art, the cross section of the metal trace 04' in the width direction is "regular trapezoid", and the inclination trend of the inclined side 043' extends towards the light-emitting surface of the array substrate 01, so that most of the reflected light GX2 generated on the inclined side 043' propagates towards the light-emitting surface of the display panel 01, and is perceived by human eyes after passing through the display panel 01, which results in the dark-state strabismus light leakage problem of the display panel 01 and influences the display effect of the display panel 01.
In order to solve the above-mentioned problems, an embodiment of the present invention provides an array substrate, as shown in fig. 2, 3 and 4, fig. 2 is a schematic top view structure of the array substrate according to the embodiment of the present invention; FIG. 3 is a schematic cross-sectional view of the structure of FIG. 3 along the direction A-A'; FIG. 4 is an enlarged schematic view of structure Q of FIG. 3; as shown in fig. 2, 3 and 4, the array substrate 100 includes a substrate 10, a first metal layer 20; the first metal layer 20 includes a plurality of first metal signal lines 21 extending along a first direction, and in a direction along the light emitting surface of the array substrate 100, the first metal lines 21 include a first bottom surface 212 close to the side of the substrate 10, a first top surface 211 far from the side of the substrate 10 of the first bottom surface 212, and a first side surface 213 connecting the first bottom surface 212 and the first top surface 211; the width D1 of the orthographic projection of the first top surface 211 on the substrate 10 is larger than the width D2 of the orthographic projection of the first bottom surface 212 on the substrate 10 along the second direction, which intersects the first direction and is parallel to the substrate 10. .
As an example, referring to fig. 2, 3 and 4, in the embodiment of the present application, the extending direction of the first metal line 21 of the array substrate 100 is a first direction, along the direction of the light emitting surface of the array substrate 100, the first metal line 21 includes a first bottom surface 212 close to the substrate 10, a first top surface 211 on the side of the first bottom surface 212 away from the substrate 10, and a first side surface 213 connecting the first top surface 211 and the first bottom surface 212, and the second direction is parallel to the substrate 10 and intersects the first direction; in this embodiment, the second direction is perpendicular to the first direction, and the second direction is the width cross-sectional direction of the first metal line 21. In the second direction, the width D1 of the orthographic projection of the first top surface 211 on the substrate 10 is greater than the width D2 of the orthographic projection of the first bottom surface 212 on the substrate 10. As shown in fig. 4, the cross-sectional shape Q of the first metal line 21 cut along the width direction thereof is "inverted trapezoid" with a cross-section perpendicular to the substrate 10 and parallel to the second direction surface, and the inclination tendency of the first side surface 213 connecting the first bottom surface 212 and the first top surface 211 is directed away from the light exit surface of the array substrate 100. When the external incident light IL irradiates the first side 213 of the first metal line 21 in the array substrate 10 from the back surface of the substrate 10, most of the reflected light OL formed on the first side 213 propagates in a direction away from or parallel to the light exit surface of the array substrate 100 due to the inclination direction of the first side 213 being away from the light exit surface of the array substrate 100, and is not emitted out of the light exit surface of the array substrate 100 to be perceived by the external human eyes. When the display panel of the array substrate 100 of the embodiment is in a dark state, the metal light leakage phenomenon formed by the high reflectivity of the metal of the first side 213 on the first metal line 21, especially the dark state strabismus light leakage problem under a large viewing angle, can be improved, and the viewing angle capability of the display device is improved.
It should be noted that, the first metal line 21 described in the embodiment of the present application is various metal wires that can be conventionally disposed in the array substrate 100, including, but not limited to, a data line, a gate line, a touch signal line, a fingerprint signal line, and the like; the first metal line 21 may not transmit the driving signal, but may be a part of some functional structures, such as a light shielding metal layer LSM located below the thin film transistor switching device layer in the array substrate 100, except that the light shielding metal layer LSM is normally disposed to cover the active layer of the light-shielding device; the light shielding metal layer LSM can be made into a strip shape and arranged in the non-opening area of the pixel, and the light shielding effect of preventing light crosstalk can be better achieved because the light shielding metal layer LSM is closer to the backlight light source. In addition, the type and material of the first metal wire 21 are not absolutely limited, and all that is required is that the structure of the first metal wire 21 in the product meets the technical characteristics of the embodiment of the present application is within the protection scope of the present application.
Further exemplary, as shown in fig. 3 and 4, when the first metal line 21 is a touch signal line, in the conventional design, in order to prevent the disconnection caused by the deviation of the etching process or reduce the impedance of the touch signal line, the touch signal line is generally thickened and widened, and the touch signal line is generally made of three layers of metal materials of molybdenum-aluminum-molybdenum (Mo-Al-Mo) stacked and wet etched to form a specific routing pattern, but because of the process reason, the first side 213 connecting the first top 211 and the first bottom 212 is not completely covered by the metal Mo with low reflection coefficient, the large area of the highly reflective metal material Al on the first side 213 is exposed to the external light IL, the reflectivity of the metal Al is up to 90%, the high reflective light OL intensity of the external light IL on the first side 213 on the touch signal line 21 is large, causing obvious oblique view dark state light leakage phenomenon, which may cause that the viewing angle does not meet the requirements of the German OEM 5.0 in the vehicle application. When the lateral etching method of the touch signal line 21 in the embodiment of the application is adopted, the overall inclination trend of the first side 213 of the touch signal line 21 faces away from the light emitting surface of the array substrate 100, most of the reflected light OL generated on the first side 213 of the touch signal line 21 can be dissipated in the array substrate, and when the array substrate 100 in the embodiment of the application is used for assembling a display panel or a display device, the dark state strabismus metal light leakage phenomenon caused by the touch signal line 21 can be obviously reduced, and the reliability of vehicle-mounted display application is improved
Optionally, please continue to refer to fig. 3 and 4; in the second direction, the surface angle a between the extending surfaces of the first side surface 213 and the first bottom surface 212 is an acute angle.
Illustratively, as shown in fig. 4, the first side 213 intersects the plane of the first bottom 212, and an included angle between the first side 213 and an extension plane of the first bottom 212 is an acute angle along the second direction. By setting the included angle between the first side surface 213 and the first bottom surface 212 to be an acute angle, when the incident light IL irradiated onto the first side surface 213 is reflected, as many reflected light OL as possible is emitted towards the direction away from the light emitting surface, so as to reduce the dark-state strabismus light leakage phenomenon caused by the reflected light on the surface of the first metal wire 21. It is understood that the smaller the angle of the face included angle a, the better the improvement effect on the dark state strabismus light leakage under the condition that the process can be realized.
It should be noted that, fig. 4 only illustrates that the shape of the first side 213 is a plane, but in reality, the first side 213 may also be other shapes, and the specific shape of the first side 213 is not limited in this embodiment, so long as all cases meeting the technical features required by this embodiment are within the scope of protection of this application.
Further alternatively, FIG. 5 is an enlarged schematic view of a part of the structure of Q in FIG. 3; at least a portion of the surface of the first side 213 is covered with a low reflection film layer 214, and the reflectivity of the low reflection film layer 214 is at least lower than the reflectivity of a portion of the metal material of the first side 213;
illustratively, the low reflection film layer 214 may be made of a low reflection metal material, and the low reflection film layer 214 has a reflectivity at least lower than a surface reflectivity of a portion of the metal material of the first side 213. For example, when the metal material of the first side 213 includes titanium, aluminum, titanium, the reflectance of titanium is lower than that of aluminum; the low reflection film 214 may be made of molybdenum or tungsten material such that the low reflection film 214 has a reflectivity at least less than the reflectivity of metallic aluminum; alternatively, in the array substrate 100 of this embodiment, the low reflection film layer 214 may be formed of an organic material having a low reflectance, and the organic material forming the low reflection film layer 214 may have a reflectance lower than that of the metal material of the first side 213. By this arrangement, the light reflection problem of the highly reflective metal material on the first side 213 can be reduced, so as to improve the dark state light leakage problem of the display panel and the display device where the array substrate 100 is located, and improve the viewing angle capability.
It should be appreciated that, to further reduce the light reflection problem occurring on the first side 213, the greater the coverage of the first side 213 by the low reflection film layer 214, the better the effect; for example, the low reflection film layer 214 completely covers the first side 213 of the first metal line 21.
Alternatively, fig. 6 is an enlarged schematic view of a further structure of Q in fig. 3; along the light emitting direction of the array substrate 100, at least part of the first side surface 213 is an arc surface, and the arc surface is curved towards a direction away from the central axis O' of the first metal line 21.
For example, with continued reference to fig. 6, the first side 213 is an arc surface, and the arc surface is curved toward a direction away from the central axis O' of the first metal wire 21; so set up, along the direction of the directional first top surface 211 of first bottom surface 212, the contained angle of first side 213 and first bottom surface 212 is less and less for incident light IL shines when being reflected on first side 213 like this, the reflection light OL of bigger proportion is towards deviating from the direction emission of play plain noodles, further promotes the improvement effect of dark state strabismus light leak. Meanwhile, the first side 213 is set to be an arc surface, so that the effect of converging light rays to a certain extent is achieved, and the visual angle contrast ratio is improved.
Optionally, the array substrate in the embodiment of the application further includes a first electrode layer, where the first electrode layer includes a plurality of first electrodes arranged in an array, and the first metal wire is electrically connected to the first electrodes and transmits a corresponding driving signal to the first electrodes.
It should be noted that, when the first electrode layer is a pixel electrode layer, the first electrode is a pixel electrode, and the first metal line may be a data line; when the first electrode layer is a touch electrode layer, the first electrode is a touch electrode, and the first metal wire is a touch signal wire; when the first electrode layer is a photosensitive electrode layer, the first electrode is a photosensitive electrode, and the first metal wire is a fingerprint signal wire. The above scenario is merely an example, and does not constitute a specific limitation on the above structural features.
Illustratively, FIG. 7 is a schematic view of yet another cross-sectional configuration taken along the direction A-A' in FIG. 2; with continued reference to fig. 2 and 7, the array substrate 100 includes a plurality of data lines 21 and a plurality of scan lines 81, the plurality of data lines 21 and the plurality of scan lines 81 are disposed to cross each other to define a plurality of sub-pixels PX, each sub-pixel PX is disposed with at least one pixel electrode 51, and a thin film transistor T is disposed at a crossing position of each scan line 81 and each data line 21. The data line 21 is electrically connected to the pixel electrode 51 through the thin film transistor T, and transmits a pixel voltage driving signal to the sub-pixel PX corresponding to the pixel electrode 51. In the prior art, the data line 21 is also formed by etching a multi-layer stacked metal structure, and the metal material forming the three-layer stacked structure of the data line 21 is typically titanium, aluminum, or titanium along the light emitting direction of the array substrate 100; since the reflection coefficient of titanium is lower than that of aluminum, the light reflectivity of the first top surface 211 and the first bottom surface 212 of the data line 21 is lower, but because of the process reason, the first side surface 213 connecting the first top surface 211 and the first bottom surface 212 is not completely covered by the metal Ti with low reflection coefficient, the larger area of the highly reflective metal material Al on the first side surface 213 is exposed to the arrival of the external light IL, and as the etching rule angle of the first side surface 213 of the data line 21 is smaller, the exposed metal Al area is larger, and the dark-state oblique light leakage phenomenon caused by the light reflection of the external light IL on the first side surface 213 of the data line 21 is more serious. When the lateral etching manner of the data line 21 in the embodiment of the present application is adopted to form an inverted trapezoid transverse cross-section structure, the overall inclination trend of the first side 213 of the data line 21 is towards the direction away from the light emitting surface of the array substrate 100, and most of the reflected light OL generated on the first side 213 of the data line 21 is dissipated inside the array substrate 100; in this way, the reflection of the data line 21 to the light can be reduced, especially the reflection of the first side 213 containing the metal with larger reflection coefficient to the light can be reduced, so as to effectively improve the dark state strabismus light leakage problem of the display panel or the display device where the array substrate 100 is located
Illustratively, FIG. 8 is a schematic view of yet another cross-sectional configuration taken along the direction A-A' in FIG. 2; please refer to fig. 2 and 7; the array substrate 100 includes a first electrode layer 40, where the first electrode layer 40 includes a plurality of touch electrodes 41 arranged in an array, the first metal lines 21 are touch signal lines, and the touch signal lines 21 are electrically connected to the touch electrodes 41; the touch signal line 21 transmits a touch driving signal to the touch electrode 41, and by integrating the touch electrode 41 in the array substrate 100, the integration level of the display panel or the display device using the array substrate 100 of the embodiment of the present application can be improved.
Still alternatively, referring to fig. 2 and 8, the array substrate 100 further includes a second metal layer 30, where the second metal layer 30 includes a plurality of second metal lines 31 extending along the first direction; the orthographic projection of the second metal line 31 at least partially overlaps the orthographic projection of the first metal line 21 on the plane of the base substrate 10.
Illustratively, each of the first metal line 21 and the second metal line may be one of a touch signal line, a data line, a fingerprint signal line, a light shielding metal line, and the like; by providing the second metal lines 31 at least partially overlapping the first metal lines 21 in the light emitting direction of the array substrate 100, the width of the black matrix for covering the metal lines can be reduced, and the transmittance of the array substrate 100 can be improved. For example, when the first metal line 21 is a touch signal line and the second metal line 31 is a data line, the data line 31 is disposed on the side of the touch signal line 21 close to the substrate 10, and the effect of the voltage signal on the data line 31 on the pixel electrode can be reduced by using the shielding effect of the touch signal line 21.
Fig. 9 is a schematic top view of a display panel according to an embodiment of the invention; FIG. 10 is a schematic view of the cross-sectional structure along the direction C-C' in FIG. 9; FIG. 11 is a schematic view of another cross-sectional structure along the direction C-C' in FIG. 9. Referring to FIGS. 9, 10 and 11, the display panel 1000 includes any of the array substrates 100 according to the embodiments of the present invention; the opposite substrate 200 and the liquid crystal layer 300 between the opposite substrate 100 and the opposite substrate 200, the display panel 1000 provided in the embodiment of the invention has the beneficial effects of the array substrate 100 provided in the embodiment of the invention, and the same points can be referred to the above description of the array substrate, and the description is omitted herein.
When it should be noted that, the display panel 1000 provided in the embodiment of the present invention further includes a color filter layer 60, where the color filter layer 60 includes a plurality of color group units 61 with different colors; the color filter layer 60 may be disposed on the opposite substrate 200 as shown in fig. 10; may also be provided on the array substrate 100 as shown in fig. 11.
Optionally, referring to fig. 9, 10 and 11, the display panel 1000 further includes a light shielding layer 70, where the light shielding layer 70 includes a plurality of first light shielding portions 711 extending along a first direction and a plurality of second light shielding portions 712 extending along a second direction, and the first light shielding portions 711 and the second light shielding portions 712 cross to define a plurality of pixel openings arranged in an array; the first metal line 21 is located on the side of the light shielding layer 70 close to the substrate 10, and the width of the orthographic projection of the first light shielding part 711 covering the first metal line 21 on the substrate 10 is not less than 6 μm and not more than 8 μm.
As an example, referring to fig. 9, 10 and 11, the display panel 1000 includes a light shielding layer 70, the light shielding layer 70 includes a grid-shaped light shielding portion 71, wherein the light shielding portion 71 is formed by intersecting a plurality of first light shielding portions 711 extending in a first direction and a plurality of second light shielding portions 722 extending in a second direction, and the light shielding portion 71 is generally formed of a black opaque material, also referred to as a black matrix. The light shielding portion 71 defines an actual opening area of the sub-pixels arranged in an array, which is used to transmit part of light emitted from the backlight to form an image. The light shielding part 71 can prevent light crosstalk between adjacent sub-pixels with different colors and improve the picture contrast; and can also be used for shielding various opaque metal wires positioned below the light shielding layer 71 in the display panel 1000, and weakening the metal light leakage phenomenon caused by the reflection of light rays on the surface of the metal wires to a certain degree. In the prior art, when the tape angle of the first metal line is etched at an acute angle (i.e. the cross section of the first metal line is in a trapezoid shape), in order to ensure that the first metal line 21 does not have an obvious problem of light leakage in a dark state due to oblique viewing, in the prior art, the size of the first light shielding portion 711 is generally set to be relatively large, and is generally 13 micrometers. In the present embodiment, since the first metal line 21 adopts a side-engraving manner to form an inverted trapezoid cross-sectional structure, most of the reflected light on the surface of the first metal line 21 is dissipated inside the display panel 1000, and the display panel 1000 is not penetrated to cause a metal oblique view light leakage phenomenon with a large viewing angle, so that the width of the first light shielding portion 711 in the present embodiment can be reduced, and when the width of the front projection of the first light shielding portion 711 on the substrate 10 is greater than or equal to 6 μm, the problem of metal light leakage can be avoided; meanwhile, considering that the excessive width of the first light shielding part 711 is prevented from influencing the aperture ratio of the sub-pixel, the width of the orthographic projection of the first light shielding part 711 on the substrate 10 is less than or equal to 8 μm, so that the aperture ratio can be greatly improved and the backlight power consumption can be reduced.
It should be noted that, in the display panel 1000 illustrated in fig. 10 and fig. 11, the light shielding layer 70 is located on one side of the stacking substrate 200, and in practical application, the position of the light shielding layer 70 may also be located on one side of the array substrate 100, and the actual position in the array substrate 100 may be adjusted according to the light shielding requirement, and in this embodiment of the present application, the specific position of the light shielding layer 70 is not limited, for example, the light shielding layer 70 may be located on the upper surface layer of the array substrate 100 closest to the liquid crystal layer 300, or may be directly located above a light-impermeable metal layer of the array substrate 100 closest to the liquid crystal layer 300.
Fig. 12 is a schematic structural diagram of a display device according to an embodiment of the present invention. As shown in fig. 12, the display device may be a mobile phone, a display screen, etc., and particularly may be a vehicle-mounted medium-and-large-size display screen.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.

Claims (8)

1. An array substrate comprises a substrate and a first metal layer; the first metal layer comprises a plurality of first metal wires extending along a first direction, and the first metal wires comprise a first bottom surface close to one side of the substrate, a first top surface positioned on one side of the first bottom surface far away from the substrate and a first side surface connecting the first bottom surface and the first top surface along the direction of the light emitting surface of the array substrate; the width of orthographic projection of the first top surface on the substrate is larger than that of orthographic projection of the first bottom surface on the substrate along a second direction, and the second direction intersects with the first direction and is parallel to the substrate;
in the second direction, the surface included angle between the first side surface and the extension surface of the first bottom surface is an acute angle;
at least part of the first side surface is covered with a low-reflection film layer, and the reflectivity of the low-reflection film layer is at least lower than that of the first side part metal material.
2. The array substrate according to claim 1, wherein at least part of the first side surface is an arc surface in a light emitting direction of the array substrate, and the arc surface is curved in a direction away from the central axis of the first metal wire.
3. The array substrate of claim 1, further comprising a first electrode layer comprising a plurality of first electrodes arranged in an array, the first metal lines electrically coupled to the first electrodes and transmitting corresponding drive signals to the first electrodes.
4. The array substrate of claim 3, further comprising a second metal layer comprising a plurality of second metal lines extending in the first direction; on a plane of the substrate, the orthographic projection of the second metal line along the second direction at least partially overlaps with the orthographic projection of the first metal line along the second direction.
5. The array substrate of claim 4, wherein the first metal line and/or the second metal line comprises a touch signal line, a data line, a fingerprint recognition signal line, and a light shielding metal line.
6. A display panel comprising an array substrate according to any one of claims 1 to 5; a counter substrate and a liquid crystal layer between the array substrate and the counter substrate.
7. The display panel of claim 6, further comprising a light shielding layer comprising a plurality of first light shielding portions extending along the first direction and a plurality of second light shielding portions extending along the second direction, the first light shielding portions and the second light shielding portions intersecting to define a plurality of sub-pixel openings arranged in an array; the first metal wire is positioned on one side of the shading layer close to the substrate, and the width of orthographic projection of the first shading part covering the first metal wire on the substrate is more than or equal to 6 mu m and less than or equal to 8 mu m.
8. A display device comprising a display panel as claimed in any one of the preceding claims 6 to 7.
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CN106932956A (en) * 2017-05-22 2017-07-07 厦门天马微电子有限公司 Array base palte, display panel and display device
CN207264349U (en) * 2017-09-18 2018-04-20 云谷（固安）科技有限公司 A kind of contact panel and display device

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Publication number Priority date Publication date Assignee Title
CN106932956A (en) * 2017-05-22 2017-07-07 厦门天马微电子有限公司 Array base palte, display panel and display device
CN207264349U (en) * 2017-09-18 2018-04-20 云谷（固安）科技有限公司 A kind of contact panel and display device

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