CN112349759B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN112349759B CN112349759B CN202010923105.XA CN202010923105A CN112349759B CN 112349759 B CN112349759 B CN 112349759B CN 202010923105 A CN202010923105 A CN 202010923105A CN 112349759 B CN112349759 B CN 112349759B
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- H—ELECTRICITY
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/40—OLEDs integrated with touch screens
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
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- H—ELECTRICITY
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
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- H—ELECTRICITY
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
- H10K50/865—Arrangements for improving contrast, e.g. preventing reflection of ambient light comprising light absorbing layers, e.g. light-blocking layers
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- H—ELECTRICITY
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- H10K50/00—Organic light-emitting devices
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/50—OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
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Abstract
The invention discloses a display panel and a display device, wherein the display panel comprises: a display area and a non-display area disposed around the display area; a display substrate; the polaroid is arranged on the light emergent side of the display substrate; the vertical projection of the polaroid on the plane of the display substrate covers the display area; the cover plate is arranged on the light emitting side of the polaroid; the non-display area of the cover plate is provided with an ink area surrounding the display area; on the plane of the display panel, a first slit is formed between the orthographic projection of the first edge of the ink area close to the display area and the orthographic projection of the second edge of the polaroid far away from the display area; a light-shielding layer formed on the display substrate; the orthographic projection of the light shielding layer on the plane of the display substrate covers the orthographic projection of the first slit on the plane of the display substrate. The technical scheme provided by the invention can solve the problem of light leakage at the edge of the polaroid of the display panel.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a display device.
Background
Along with the development of the display industry, the flexible display technology is gradually applied to wearable equipment in the fields of medicine, aviation and the like, for example, the smart band needs to be set with a flexible display panel so as to realize a display screen with curved surface display.
In order to pursue the extreme experience of narrow borders, the prior art improves the overall screen area ratio by reducing the borders of the non-display area. However, the edge of the polarizer is easy to leak light due to the compression of the frame, which causes the phenomena of bright lines, heterochrosis, even Mura and the like at the edge of the display area, reduces the display quality of the display panel, and reduces the narrow frame capability of the display panel.
Disclosure of Invention
The embodiment of the invention provides a display panel and a display device, and aims to solve the problem of light leakage at the edge of a polaroid of the display panel.
In a first aspect, an embodiment of the present invention provides a display panel, including: a display area and a non-display area disposed around the display area;
a display substrate;
the polaroid is arranged on the light emergent side of the display substrate; the vertical projection of the polaroid on the plane of the display substrate covers the display area;
the cover plate is arranged on the light emitting side of the polaroid; the non-display area of the cover plate is provided with an ink area surrounding the display area; on the plane of the display panel, a first slit is formed between the orthographic projection of the first edge, close to the display area, of the ink area and the orthographic projection of the second edge, far away from the display area, of the polarizer;
a light-shielding layer formed on the display substrate; and the orthographic projection of the light shielding layer on the plane of the display substrate covers the orthographic projection of the first slit on the plane of the display substrate.
In a second aspect, an embodiment of the present invention further provides a display device, including the display device provided in any embodiment of the present invention.
The display panel comprises a display substrate, a polaroid and a cover plate which are sequentially arranged, the display panel is arranged on a plane parallel to the display panel and comprises a display area and a non-display area arranged around the display area, the orthographic projection of the polaroid on the display panel covers the display area, the non-display area of the cover plate comprises an ink area arranged around the display area, the ink area comprises a first edge close to the display area, the polaroid comprises a second edge far away from the display area, a first slit is formed between the orthographic projection of the first edge on the display panel and the orthographic projection of the second edge on the display panel, a light shielding layer is manufactured on the display substrate of the embodiment, the light shielding layer covers the first slit in the orthographic projection of a screen where the display panel is located, the light shielding layer effectively shields the first slit, the light shielding layer can prevent metal on the display substrate from reflecting through the first slit in a black screen state, light rays emitted by the display substrate in a screen wiring state can be prevented from penetrating through the first slit, the light contrast between the first slit area and the polaroid is reduced, the effect of the slit area and the coverage of the first slit, the black area is achieved, the edge of the polaroid, and the narrow border of the polaroid is improved.
Drawings
Fig. 1 is a schematic cross-sectional view of a display panel in the related art;
fig. 2 is a schematic cross-sectional view of another display panel in the related art;
fig. 3 is a schematic plan view of a display panel according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view taken along line a-a' of FIG. 3;
FIG. 5 is a schematic diagram of a planar structure of another display panel according to an embodiment of the present invention;
FIG. 6 is an enlarged schematic view of a non-display area of the display panel shown in FIG. 3;
FIG. 7 is another schematic cross-sectional view of the display panel of FIG. 3 along line a-a';
FIG. 8 is another schematic cross-sectional view of the display panel of FIG. 3 along line a-a';
FIG. 9 is another schematic cross-sectional view of the display panel of FIG. 3 along line a-a';
fig. 10 is a schematic plan view of another display panel according to an embodiment of the present invention;
FIG. 11 is another schematic cross-sectional view of the display panel of FIG. 3 along line a-a';
FIG. 12 is another schematic cross-sectional view of the display panel of FIG. 3 along line a-a';
FIG. 13 is another schematic cross-sectional view of the display panel of FIG. 3 along line a-a';
FIG. 14 is another schematic cross-sectional view of the display panel of FIG. 3 along line a-a';
FIG. 15 is another schematic cross-sectional view of the display panel of FIG. 3 along line a-a';
FIG. 16 is another schematic cross-sectional view of the display panel of FIG. 3 along line a-a';
FIG. 17 is another schematic cross-sectional view of the display panel of FIG. 3 along line a-a';
FIG. 18 is another schematic cross-sectional view of the display panel of FIG. 3 along line a-a';
fig. 19 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
As shown in fig. 1, fig. 1 is a schematic cross-sectional structure diagram of a display panel in the related art, an edge of a polarizer 12' of the display panel is located in a non-display area NA ' of a display substrate 11', the non-display area NA ' of the display substrate 11' is provided with a metal trace 112', and referring to fig. 1, it can be known that, when the display panel is in a screen-refreshing state, and an external natural light non-display area NA ' enters, the external natural light non-display area NA ' is reflected from the edge of the polarizer 12' through the metal trace 112', an optical contrast is aggravated due to a reflection of the metal trace 112' and a blackening effect of a surface of the polarizer 12', and an edge identification of the polarizer 12' with a large viewing angle is obvious. As shown in fig. 2, fig. 2 is a schematic cross-sectional structure diagram of another display panel in the related art, when the display panel is in a dot-screen state, light emitted from the display substrate 11 'exits through the edge of the polarizer 12', and similarly due to the blackening effect of the surface of the polarizer 12', the light exiting through the edge of the polarizer 12' is obviously compared with the light exiting through the polarizer 12', so that a user sees the edge of the polarizer, and the edge leakage of the polarizer occurs, which is usually indicated as the appearance of bright lines, different colors, even Mura, and the like around the display area AA' of the display panel.
To solve the above problem, an embodiment of the present invention provides a display panel, including: a display area and a non-display area disposed around the display area;
a display substrate;
the polaroid is arranged on the light emergent side of the display substrate; the vertical projection of the polaroid on the plane of the display substrate covers the display area;
the cover plate is arranged on the light emitting side of the polaroid; the non-display area of the cover plate is provided with an ink area surrounding the display area; on the plane of the display panel, a first slit is formed between the orthographic projection of the first edge of the ink area close to the display area and the orthographic projection of the second edge of the polaroid far away from the display area;
a light-shielding layer formed on the display substrate; the orthographic projection of the light shielding layer on the plane of the display substrate covers the orthographic projection of the first slit on the plane of the display substrate.
In the embodiment of the invention, the display panel comprises a display substrate, a polarizer and a cover plate which are sequentially arranged, the display panel comprises a display area and a non-display area which is arranged around the display area on a plane parallel to the display panel, the orthographic projection of the polarizer on the display panel covers the display area, the non-display area of the cover plate comprises an ink area which is arranged around the display area, the ink area comprises a first edge which is close to the display area, the polarizer comprises a second edge which is far away from the display area, a first slit is formed between the orthographic projection of the first edge on the display panel and the orthographic projection of the second edge on the display panel, a light shielding layer is manufactured on the display substrate of the embodiment, the light shielding layer covers the first slit in the orthographic projection of a screen where the display panel is located, the light shielding layer can effectively shield the first slit, the light shielding layer can prevent metal on the display substrate from reflecting through the first slit in a black screen state, light rays emitted by the display substrate in a screen wiring state can be prevented from penetrating through the first slit, the light contrast between the first slit area and the polarizer can be reduced, the black slit area and the thin border of the polarizer can be recognized, and the frame of the display panel can be displayed.
The above is the core idea of the present invention, and the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.
Fig. 3 is a schematic plane structure diagram of a display panel according to an embodiment of the present invention, and fig. 4 is a schematic cross-sectional view along a line a-a' in fig. 3, as shown in fig. 3, on a plane where the display panel is located, the display panel includes a display area AA and a non-display area NA disposed around the display area AA, as shown in fig. 4, and in a cross-sectional direction of the display panel, the display panel includes a display substrate 11, a polarizer 12 and a cover plate 13 sequentially disposed, the display substrate 11 includes an array structure layer and an organic light emitting structure layer for displaying, so as to implement a picture display, the polarizer 12 is disposed on a light emitting side of the display substrate 11 and covers the display area AA of the display substrate 11, the cover plate 13 is disposed on the light emitting side of the polarizer 12 and covers the display substrate 11, in order to implement a black-on-screen state integrated effect, the non-display area NA of the cover plate 13 is disposed with an ink area 131 surrounding the display area AA, wherein an ink layer 1311 is disposed on a side of the cover plate in the ink area 131 close to the display substrate 11; referring to fig. 4, on the plane of the display panel, the ink area 131 includes an edge close to the display area AA and an edge far from the display area AA, the polarizer 12 covers the entire display area AA, including the edge far from the display area AA, in this embodiment, the edge of the ink area 131 close to the display area AA is set as a first edge L1, the edge of the polarizer 12 far from the display area AA is set as a second edge L2, a first slit S1 exists between a forward projection of the first edge L1 on the plane of the display panel and a forward projection of the second edge L2 on the plane of the display panel, and a reason for existence of the first slit S1 includes: firstly, polarizer 12 has manufacturing process errors and attachment errors; secondly, the ink area 131 has an error of ± 100um due to the low process accuracy. Both the polarizer 12 and the ink area 131 have a certain error value, which cannot ensure that the ink area 131 coincides with the polarizer 12, and especially for a display panel with a narrow frame, the width of the ink area 131 cannot be set too wide, so that the first edge L1 and the second edge L2 have a first slit S1 on the plane where the display panel is located. The first slit S1 is located in a non-display area NA, the non-display area NA includes a driving circuit and a metal wire, and if the first slit S1 is not shielded, light leakage at the edge of the polarizer 12 or metal reflection may occur. In this embodiment, the light-shielding layer 14 is formed on the display substrate, the light-shielding layer 14 is made of an opaque material, and an orthographic projection of the light-shielding layer 14 on the plane of the display panel can cover the first slit S1, so that the first slit S1 does not leak light, and similarly, the light-shielding layer 14 plays a role of shielding a metal layer to prevent a light reflection phenomenon of external light. The light shielding layer 14 can reduce the contrast between the first slit S1 and the polarizer 12, so as to achieve an integral black effect between the area where the first slit S1 is located and the area covered by the polarizer 12, and effectively avoid the problem that the edge of the polarizer is visible. It should be noted that in this embodiment, the light-shielding layer 14 is directly formed on the display substrate 11, rather than being attached to the display substrate 11, alternatively, the light-shielding layer 14 may be formed by a yellow light process in this embodiment, and the light-shielding layer 14 may be formed on a certain structural layer of the display substrate 11, specifically, the process of forming the light-shielding layer 14 specifically includes: firstly, a layer of light shielding material is coated on a certain structural layer of the display substrate 11, a layer of photoresist is formed on the light shielding material, the photoresist is exposed through a photomask, the photoresist is developed to form a pattern required by the light shielding layer 14 on the photoresist, finally, the photoresist is removed through etching stripping, the pattern required by the light shielding layer 14 is transferred onto the light shielding material to form the light shielding layer 14, the precision of the photomask is high, and the precision of the exposure and etching processes is also high.
Fig. 5 is a schematic plan view of another display panel according to an embodiment of the present invention, where, alternatively, the first slit S1 may be disposed around the display area AA; the light-shielding layer 14 is disposed around the display area AA in an orthogonal projection of the plane of the display substrate 11. At the circumferential edge of the display area AA, there may be a first slit S1, as shown in fig. 5, in the plane where the display substrate is located, the first slit S1 is disposed around the display area AA, and correspondingly, the light shielding layer 14 is disposed around the display area AA and is used for shielding the first slit S1, so as to effectively avoid the problem that the edge of the polarizer is visible.
In addition, as shown in fig. 3, the first slit S1 may be only disposed in a lower step area of the display panel, where the lower step area is a side of the display panel bound with the chip or the circuit board, specifically, referring to fig. 6, fig. 6 is an enlarged structural diagram of a non-display area of the display panel in fig. 3, and optionally, the non-display area NA may include a binding area 11a for binding the driving chip or the flexible circuit board; the non-display area NA further includes a first non-display area NA1 between the display area AA and the bonding area 11a, and an orthogonal projection of the first slit S1 on the plane of the display substrate 11 is located in the first non-display area NA 1.
The lower step area of the display panel is generally provided with a binding area 11a, the binding area 11a is used for binding a driver Chip or a flexible circuit board, when the binding area 11a is used for binding the flexible circuit board, the display panel can adopt a Chip On Film (COF) binding mode, that is, a crystal grain and Film packaging technology for fixing the driver Chip On the flexible circuit board, and when the binding area 11a is used for binding the driver Chip, the display panel can adopt a Chip On Glass (COG) binding mode to directly bind the driver Chip On a substrate of the display substrate 11. In this embodiment, the non-display area NA between the display area AA and the binding area 11a is set as a first non-display area NA1, the binding area 11a is covered with the ink area 131, the display area AA is covered with the polarizer 12, and a first slit S1 formed by the ink area 131 and the polarizer 12 is located in the first non-display area NA 1. The light shielding layer 14 is disposed in the first non-display area NA1, and can shield the first slit S1, and the wider ink area 131 is not required, which is beneficial to narrow frame setting of the lower step area.
With continued reference to fig. 6, optionally, the first non-display area NA may include a fan-out area 11b; the orthographic projection of the first slit S1 on the plane of the display substrate 11 is positioned in the fan-out area 11b; FIG. 7 is another cross-sectional view of the display panel of FIG. 3 along line a-a', the display substrate 11 including a first substrate 111; an active layer 112, a gate insulating layer 113, a gate metal layer 114, a first insulating layer 115, a capacitor metal layer 116, a second insulating layer 117, a source/drain metal layer 118, a planarization layer 119, an anode layer 120, a cathode layer 121, and a package layer 122, which are sequentially disposed on the first substrate 111; in the non-display area NA, the cathode layer 121 is connected to the source/drain metal layer 118 through the anode layer 120; the fan-out region 11b of the display substrate 11 is provided with a plurality of fan-out leads 1111 connected with corresponding bonding pads 1112 of the bonding region 11 a; fan-out lead 1112 is disposed in at least one of source drain metal layer 118, gate metal layer 114, and capacitor metal layer 116.
As shown in fig. 6, in the present embodiment, the fan-out region 11b is formed in the first non-display region NA, the orthographic projection of the first slit S1 on the plane of the display substrate 11 is located in the fan-out region 11b, the fan-out region 11b of the display substrate 11 is provided with a plurality of fan-out leads 1111, and the fan-out leads 1111 are connected to the data lines led out from the display region AA and the driving control lines for driving the gate driving circuit, for example, the clock signal lines and the power lines. The bonding region 11a is provided with a plurality of bonding pads 1112, and fan-out leads 1111 are connected to the bonding pads 1112 in one-to-one correspondence for receiving driving signals. As shown in fig. 7, in the present embodiment, the display substrate 11 includes a first substrate 111, an active layer 112 is disposed on the first substrate 111, optionally, a buffer layer may be further disposed between the first substrate 111 and the active layer 112, a gate insulating layer 113 and a gate metal layer 114 are sequentially disposed on the active layer 112, the gate metal layer 114 includes a gate line and one electrode plate of a capacitor, a first insulating layer 115 and a capacitor metal layer 116 are disposed on the gate metal layer 114, the capacitor metal layer 116 is disposed with another electrode plate of the capacitor, and furthermore, the capacitor metal layer 116 in the non-display area NA may be disposed with a partial fan-out lead 1111. The capacitor metal layer 116 is further provided with a second insulating layer 117 and a source-drain metal layer 118, the source-drain metal layer 118 is provided with a source, a drain, a data line, and the like, and the source-drain metal layer 118 in the non-display area NA may also be provided with a partial fan-out lead 1111. The source-drain metal layer 118 is further provided with a planarization layer 119, an anode layer 120, a pixel defining layer, an organic light emitting layer 123, a cathode layer 121, and an encapsulation layer 122. In the non-display area NA, the cathode layer 121 is connected to the source-drain metal layer 118 through the anode layer 120, so that the cathode layer 121 receives the power signal input by the fan-out trace 111 of the source-drain metal layer 118. In this embodiment, fan-out lead 1112 may be disposed on at least one of source/drain metal layer 118, gate metal layer 114, and capacitor metal layer 116, and it should be noted that corresponding bonding pad 1112 in bonding region 11a is disposed on source/drain metal layer 118, and fan-out leads 1111 of other metal layers (gate metal layer 114 and capacitor metal layer 116) are all connected to source/drain metal layer 118 through holes.
Optionally, with continued reference to fig. 6, the orthographic projection of the light-shielding layer 14 on the display substrate 11 may at least partially cover the fan-out leads 1111; the light-shielding layer 14 is disposed between the cathode layer 121 and the encapsulation layer 122 or the light-shielding layer 14 is formed on a side of the encapsulation layer 122 away from the first substrate 111.
The orthographic projection of the first slit S1 on the plane of the display substrate 11 is located in the fan-out area 11b, the orthographic projection of the light shielding layer 14 on the display substrate 11 covers the first slit S1, so that the orthographic projection of the light shielding layer 14 on the display substrate 11 can at least partially cover the fan-out lead 1111 to prevent the fan-out lead 1111 from reflecting from the first slit S1, and the light shielding layer 14 needs to be partially overlapped with the polarizer 12 to effectively prevent the light leakage at the edge of the polarizer 12. As shown in fig. 7, the light shielding layer 14 may be disposed on a side of the package layer 122 away from the first substrate 111 to shield the fan-out lead 1111. In addition, as shown in fig. 8, fig. 8 is another cross-sectional view of the display panel in fig. 3 along a line a-a', and the light shielding layer 14 may be further disposed between the cathode layer 121 and the encapsulation layer 122 to facilitate the attachment between the encapsulation layer 122 and the polarizer.
Fig. 9 is another schematic cross-sectional view of the display panel shown in fig. 3 along a line a-a', fig. 10 is a schematic plan view of another display panel provided in the embodiment of the invention, and optionally, the display substrate 11 may further include a touch electrode layer 123, a third insulating layer 124, a bridge layer 125, and a fourth insulating layer 126 sequentially disposed on the encapsulation layer 122; the display panel further includes a plurality of touch signal lines 127 for transmitting a touch driving signal to the touch electrodes 1231 of the touch electrode layer 123 and/or receiving a touch sensing signal output by the touch electrodes; the first non-display area NA1 further has a plurality of touch leads 128, and the touch leads 128 are connected to the corresponding touch signal lines 127; the orthographic projection of the light shielding layer 14 on the display substrate 11 at least partially covers the touch lead 128.
In this embodiment, a touch structure layer is integrated on the display substrate 11, specifically, the touch electrode layer 123, the third insulating layer 124, the bridge layer 125 and the fourth insulating layer 126 are continuously formed on the package layer 122, as shown in fig. 10, the display area AA of the touch electrode layer 123 includes touch electrodes 1231 arranged in an array, and the display area AA of the bridge layer 125 includes a plurality of bridges 1251 for connecting two touch electrodes 1231 adjacent in the row direction X or two touch electrodes 1231 adjacent in the column direction Y through vias. The display panel further includes a plurality of touch signal lines 127, a portion of the touch signal lines 127 are disposed on the touch electrode layer 123, and a portion of the touch signal lines 127 are disposed on the bridge layer 125. The touch signal line 127 is configured to transmit a touch driving signal to the touch electrode 1231 or receive a touch sensing signal output by the touch electrode, the first non-display area NA1 is further provided with a plurality of touch leads 128, the touch leads 128 are configured to be connected to corresponding touch signal lines 127, for example, the touch signal lines 127 may be connected to corresponding touch leads 128 via a mux circuit, and the plurality of touch signal lines 127 may correspond to the same touch lead 128. In addition, the touch signal lines 127 and the touch leads 128 may also be disposed in a one-to-one correspondence, which is not limited in this embodiment. The perpendicular projection of the first slit on the plane of the display panel at least partially covers the touch lead 128, and the orthogonal projection of the light shielding layer 14 on the display substrate 11 covers the first slit, thereby at least partially covering the touch lead 128, so as to avoid the light reflection phenomenon of the touch lead at the first slit.
FIG. 11 is another cross-sectional view of the display panel of FIG. 3 along line a-a', and optionally, as shown in FIG. 11, a light shielding layer 14 may be disposed between the bridge layer 125 and the fourth insulating layer 126; alternatively, with continued reference to fig. 9, the light-shielding layer 14 is formed on the side of the fourth insulating layer 126 away from the first substrate 111.
The orthographic projection of the first slit on the plane of the display substrate 11 is located in the fan-out area, the orthographic projection of the light shielding layer 14 on the display substrate 11 covers the first slit, so that the orthographic projection of the light shielding layer 14 on the display substrate 11 can at least partially cover the touch lead, the touch lead is prevented from reflecting light from the first slit, and the light shielding layer 14 needs to be partially overlapped with the polarizer, so that light leakage at the edge of the polarizer 12 is effectively avoided. As shown in fig. 9, the light shielding layer 14 may be disposed on a side of the fourth insulating layer 126 away from the first substrate 111 to shield the touch lead. In addition, as shown in fig. 11, the light shielding layer 14 may be disposed between the bridge layer 125 and the fourth insulating layer 126 to facilitate the subsequent attachment between the packaging layer 122 and the polarizer.
Fig. 12 is another cross-sectional view of the display panel of fig. 3 along a line a-a ', and fig. 13 is another cross-sectional view of the display panel of fig. 3 along a line a-a', and optionally, the light-shielding layer 14 may be multiplexed on the third insulating layer 124 and/or the fourth insulating layer 126 of the first non-display area NA 1.
As shown in fig. 12, in the present embodiment, the light-shielding layer 14 can be formed without adding a yellow light process, and the light-shielding material can be doped into a portion of the first non-display area NA1 of the third insulating layer 124 to form the light-shielding layer 14, so as to shield the touch lead disposed on the touch electrode layer 123 and reduce the light reflection phenomenon of the touch lead. As shown in fig. 13, in this embodiment, a light-shielding material may be doped into a portion of the first non-display area NA1 of the fourth insulating layer 126 to form the light-shielding layer 14, so as to shield the touch electrode layer 123 and the touch lead disposed across the bridge layer 125 at the same time, thereby reducing the light reflection phenomenon of the touch lead. No matter the third insulating layer 124 is multiplexed as the light shielding layer 14 or the fourth insulating layer 126 is multiplexed as the light shielding layer 14, one manufacturing process of the light shielding layer 14 can be effectively reduced, and the manufacturing efficiency of the display panel can be improved. In addition, in the present embodiment, in order to further improve the shielding effect of the light-shielding layer 14 on the touch lead, the first non-display area NA1 of the third insulating layer 124 and the fourth insulating layer 126 may be multiplexed as the light-shielding layer 14.
The touch structures of the display panels in fig. 9 to fig. 13 are all in a TP on the TFE form, optionally, a plug-in form may be further adopted in this embodiment, as shown in fig. 14, fig. 14 is another schematic cross-sectional view of the display panel in fig. 3 along a line a-a', and the display panel may further include: a touch substrate 15; the touch substrate 15 is disposed between the display substrate 11 and the polarizer; the touch substrate 15 includes a second substrate 151, and a touch electrode layer 123, a fifth insulating layer 152, a bridge layer 125 and a sixth insulating layer 153 sequentially disposed on the second substrate 151; the touch electrode layer 123 includes touch electrodes arranged in an array; the display panel also comprises a plurality of touch signal lines which are used for sending touch driving signals to the touch electrodes and/or receiving touch sensing signals output by the touch electrodes; the first non-display area NA1 includes a touch lead line correspondingly connected to the touch signal line; the orthographic projection of the light shielding layer 14 on the display substrate 11 at least partially covers the touch lead.
Referring to fig. 14, the external touch substrate 15 sequentially includes a second substrate 151, a touch electrode layer 123, a fifth insulating layer 152, a bridge layer 125, and a sixth insulating layer 153, one side of the second substrate 151 of the touch substrate 15 may be attached to the display substrate 11, and the touch substrate 15 is disposed between the display substrate 11 and the polarizer. As shown in fig. 10, the display area AA of the touch electrode layer 123 includes touch electrodes 1231 arranged in an array, and the display area AA of the bridge crossing layer 125 includes a plurality of bridges 1251 for connecting two adjacent touch electrodes 1231 in the row direction X or two adjacent touch electrodes 1231 in the column direction Y through vias. The display panel further includes a plurality of touch signal lines 127, a portion of the touch signal lines 127 is disposed on the touch electrode layer 123, and a portion of the touch signal lines 127 is disposed on the bridge layer 125. The touch signal lines 127 are used for transmitting a touch driving signal to the touch electrodes 1231 or receiving a touch sensing signal output by the touch electrodes, the first non-display area NA1 is further provided with a plurality of touch leads 128, and the touch leads 128 are used for being connected with the corresponding touch signal lines 127. The perpendicular projection of the first slit on the plane of the display panel at least partially covers the touch lead 128, and the orthogonal projection of the light shielding layer 14 on the display substrate 11 covers the first slit, thereby at least partially covering the touch lead 128, so as to avoid the light reflection phenomenon of the touch lead at the first slit.
Fig. 15 is another cross-sectional view of the display panel shown in fig. 3 along a line a-a', as shown in fig. 15, optionally, a light shielding layer 14 may be disposed between the touch electrode layer 123 and the sixth insulating layer 153; alternatively, as shown in fig. 14, the light-shielding layer 14 is formed on the sixth insulating layer 153 on the side away from the first substrate 111.
The orthographic projection of the first slit on the plane of the display substrate 11 is located in the fan-out area, the orthographic projection of the light shielding layer 14 on the display substrate 11 covers the first slit, so that the orthographic projection of the light shielding layer 14 on the touch substrate 15 can at least partially cover the touch lead, the touch lead is prevented from reflecting light from the first slit, and the light shielding layer 14 needs to be partially overlapped with the polarizer, so that light leakage at the edge of the polarizer 12 is effectively avoided. As shown in fig. 14, the light shielding layer 14 may be disposed on a side of the sixth insulating layer 153 away from the first substrate 111 to shield the touch lead. In addition, as shown in fig. 11, the light shielding layer 14 may be further disposed between the touch electrode layer 123 and the sixth insulating layer 153 to facilitate the attachment between the touch substrate 15 and the polarizer 12.
Fig. 16 is another cross-sectional view of the display panel of fig. 3 taken along a line a-a ', and fig. 17 is another cross-sectional view of the display panel of fig. 3 taken along a line a-a', and optionally, the light shielding layer 14 may be multiplexed with the fifth insulating layer 152 and/or the sixth insulating layer 153 in the first non-display area NA.
As shown in fig. 16, in the present embodiment, the light shielding layer 14 may be formed without adding a yellow light process, and a portion of the first non-display area NA1 of the fifth insulating layer 152 may be doped with a light shielding material to form the light shielding layer 14, so as to shield the touch lead disposed on the touch electrode layer 123, and reduce the light reflection phenomenon of the touch lead. As shown in fig. 17, in this embodiment, a light-shielding material may be doped into a portion of the first non-display area NA1 of the sixth insulating layer 153 to form the light-shielding layer 14, so as to simultaneously shield the touch electrode layer 123 and the touch lead disposed on the bridge layer 125, thereby reducing the light reflection phenomenon of the touch lead. No matter the fifth insulating layer 152 is reused as the light shielding layer 14, or the sixth insulating layer 153 is reused as the light shielding layer 14, one manufacturing process of the light shielding layer 14 can be effectively reduced, and the manufacturing efficiency of the display panel can be improved. In addition, in the present embodiment, in order to further improve the shielding effect of the light shielding layer 14 on the touch lead, the first non-display area NA1 of the fifth insulating layer 152 and the sixth insulating layer 153 may be simultaneously multiplexed as the light shielding layer 14.
Alternatively, the material of the light shielding layer 14 may include a light shielding material; the light-shielding material includes at least one of carbon black, a black resin, and a black ink. The light shielding layer 14 includes a light shielding material, and for example, the light shielding material in the light shielding layer 14 may be doped into the light shielding layer 14 in the form of light shielding particles to achieve a light shielding effect. Or the light shielding layer 14 may be a composite material formed of a plurality of layers of light shielding materials. The light shielding material employed in the present embodiment may be at least one of carbon black, black resin, and black ink, for example, at least one of carbon black particles, black resin particles, and black ink particles may be doped in the host material of the light shielding layer 14, or the light shielding layer 14 may include a composite film layer formed of at least one of a carbon black film layer, a black resin film layer, and a black ink film layer.
Optionally, the mass ratio of the light-shielding material in the light-shielding layer 14 may be smaller than the mass ratio of the light-shielding material in the ink region; and the mass ratio of the light-shielding material in the light-shielding layer 14 is greater than that of the light-shielding material in the polarizer. The light shielding layer 14 serves as a transition layer between the ink region and the polarizer, so that effective transition of colors between the ink region and the polarizer can be realized, and the mass ratio of the light shielding material in the light shielding layer 14 is between the mass ratio of the light shielding material in the ink region and the mass ratio of the light shielding material in the polarizer, that is, the color gray of the light shielding layer 14 is between the color gray of the ink region and the color gray of the polarizer. The embodiment can realize the integral black effect among the ink area, the shading layer and the polaroid, and can fade the identification of human eyes to the edge of the polaroid.
Optionally, in a plane where the display panel substrate is located and in a direction from the display area to the non-display area, the proportion of the light-shielding material in the light-shielding layer may gradually increase, and then the color grayscale of the light-shielding layer gradually deepens in the direction from the display area to the non-display area. Generally, the color gray of the ink area is deeper than the color gray of the polarizer, so that the proportion of the light-shielding material in the light-shielding layer is gradually increased in the embodiment, the effective transition of the color gray from the polarizer to the ink area is realized, the integral black effect among the ink area, the light-shielding layer and the polarizer is further improved, the color is uniformly changed gradually, and the identification of human eyes on the edges of the polarizer and the ink area is reduced. Illustratively, the proportion of the light-shielding material in the light-shielding layer increases in a gradient manner in a direction in which the display substrate is located and is directed from the display area to the non-display area.
Fig. 18 is another schematic cross-sectional view of the display panel in fig. 3 along a line a-a', and optionally, a distance m1 between a third edge L3 of the light shielding layer 14 away from the display area AA and a first edge L1 of the ink area 131 may be: m1> b tan β; wherein sin θ/sin α = n1/n2; sin β/sin θ = n2/n1; α is a first incident angle formed by the maximum visible sight line without light leakage on the light emergent side of the cover plate 13; θ is a first refraction angle formed by the interface of the first incident angle between the air and the light exit side of the cover plate 13; β is a second refractive angle formed by the first refractive angle at an interface between the non-light-exit side of the cover plate 13 and air; b is the thickness of polarizer 12; n1 is the refractive index of the cover plate 13; n2 is the refractive index of air; the value of the distance m2 between the fourth edge L4 of the light shielding layer 14 close to the display area AA and the second edge L2 of the polarizer 12 is as follows: d3 is more than or equal to m2 and more than d1+ d2; wherein d1 is the absolute value of the maximum cutting error of polarizer 12; d2 is the absolute value of the maximum attaching error of the polaroid; d3 is the distance between the second edge of the polarizer and the edge of the display area.
In order to effectively shield the first slit S1, avoid metal reflection in the fan-out area at a larger viewing angle, and prevent light leakage at the edge of the polarizer 12 at a larger viewing angle, the light shielding layer 14 needs to partially overlap the ink area 131 and the polarizer 12 in the plane of the display panel. In this embodiment, an edge of the light shielding layer 14 away from the display area AA is a third edge L3, an edge of the light shielding layer 14 close to the display area AA is a fourth edge L4, α is a first incident angle formed by the maximum light-tight visual line on the light emergent side of the cover plate 13, when the viewing angle is greater than α, the external light cannot be input into the cover plate 13, that is, the first incident angle α is a visual angle boundary value, and a position where the incident light of the first incident angle α is refracted to the light shielding layer 14 may be a boundary value of the third edge L3 of the light shielding layer 14. The first refraction angle θ is a refraction angle formed by the external light rays of the first incident angle α at the interface between the air and the cover plate 13, and the second refraction angle β is a refraction angle formed by the external light rays of the first refraction angle θ at the interface between the cover plate 13 and the air. Polarizer 12 has a thickness b. The refractive index of the cover plate 13 is n1, the refractive index of air is n2, and the formula of the refractive index shows that: sin θ/sin α = n1/n2; sin β/sin θ = n2/n1; the first incident angle α, the refractive index n1 of the cover plate 13, and the refractive index n2 of the air are known quantities, a first refraction angle θ can be obtained according to the known quantities, and a value of a second refraction angle β can be obtained according to the first refraction angle θ, and according to a triangle formula, a boundary value of a distance m1 between a third edge L3 of the light shielding layer 14 and the first edge L1 of the ink region 131 is b tan β; that is, the minimum value of the spacing m1 between the third edge L3 of the light shielding layer 14 and the first edge L1 of the ink region 131 is b × tan β; in this embodiment, m1> b tan β may be selected.
Similarly, the light shielding layer 14 needs to partially coincide with the polarizer 12, it is known that an error may occur in the cutting process of the polarizer 12, and an attachment error may also exist during attachment, in this embodiment, an absolute value d1 of the maximum cutting error of the polarizer 12 may be obtained through multiple tests and measurements, an absolute value d2 of the maximum attachment error of the polarizer may also be obtained through multiple tests and measurements, a distance d3 between the second edge L2 of the polarizer 12 and the edge of the display area AA may also be obtained, and the light shielding layer 14 needs to be able to completely counteract the cutting error and the attachment error, so as to ensure that the light shielding layer 14 needs to have an overlapping area with the polarizer 12 on the plane where the display panel is located. Moreover, the light-shielding layer 14 is disposed in the non-display area NA as much as possible to prevent the light-shielding layer 14 from affecting the image display of the display area AA, and in this embodiment, the value of the distance m2 between the fourth edge L4 of the light-shielding layer 14 and the second edge L2 of the polarizer 12 is limited as follows: d3 is more than or equal to m2 and more than d1+ d2.
The overlapping sizes between the light shielding layer 14 and the ink area 131 and between the light shielding layer 14 and the polarizer 12 are limited, so that the situation of metal reflection or light leakage display at the first slit S1 is effectively prevented, the problem that the edge of the polarizer 12 is visible is avoided, the integral black effect of the first slit S1 and the polarizer covering area is realized, the ink area 131 with low precision does not need to be widened in a large amount, and the narrow frame capacity of the display panel is effectively improved.
The embodiment of the invention also provides a display device. Fig. 19 is a schematic structural diagram of a display device according to an embodiment of the present invention, and as shown in fig. 19, the display device according to the embodiment of the present invention includes the display panel 1 according to any embodiment of the present invention. The electronic device may be a mobile phone as shown in fig. 19, or may also be a computer, a television, an intelligent wearable device, and the like, and optionally, in this embodiment, the display device may preferably be a narrow-bezel display panel with a fixed curved surface, for example, a vehicle-mounted display screen, a flexible bracelet touch display screen, and the like, and the specific type of the display device is not particularly limited in this embodiment.
It is to be noted that the foregoing description is only exemplary of the invention and that the principles of the technology may be employed. Those skilled in the art will appreciate that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements and substitutions will now be apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (14)
1. A display panel, comprising: a display area and a non-display area disposed around the display area;
a display substrate;
the polaroid is arranged on the light-emitting side of the display substrate; the vertical projection of the polaroid on the plane of the display substrate covers the display area;
the cover plate is arranged on the light emitting side of the polaroid; the non-display area of the cover plate is provided with an ink area surrounding the display area; on the plane of the display panel, a first slit is formed between the orthographic projection of the first edge, close to the display area, of the ink area and the orthographic projection of the second edge, far away from the display area, of the polarizer;
a light-shielding layer formed on the display substrate; the orthographic projection of the light shielding layer on the plane of the display substrate covers the orthographic projection of the first slit on the plane of the display substrate;
the non-display area comprises a binding area for binding the driving chip or the flexible circuit board;
the non-display area further comprises a first non-display area between the display area and the binding area, and the orthographic projection of the first slit on the plane of the display substrate is positioned in the first non-display area;
the first non-display region includes a fan-out region; the orthographic projection of the first slit on the plane of the display substrate is positioned in the fan-out area;
the fan-out area of the display substrate is provided with a plurality of fan-out leads connected with the corresponding binding pads of the binding area;
the orthographic projection of the light shielding layer on the display substrate at least partially covers the fan-out lead;
the light shield layer is in orthographic projection on the display substrate with the ink district is in orthographic projection partial coincidence on the display substrate, just the light shield layer is in orthographic projection on the display substrate with the polaroid is in orthographic projection partial coincidence on the display substrate to avoid the metal reflection of fan-out area, and prevent the marginal light leak of polaroid.
2. The display panel according to claim 1,
the display substrate comprises a first substrate; the active layer, the grid insulation layer, the grid metal layer, the first insulation layer, the capacitor metal layer, the second insulation layer, the source and drain metal layer, the planarization layer, the anode layer, the cathode layer and the packaging layer are sequentially arranged on the first substrate; in the non-display area, the cathode layer is connected with the source drain metal layer through the anode layer;
the fan-out lead is arranged on at least one of the source drain metal layer, the grid metal layer and the capacitor metal layer.
3. The display panel according to claim 2,
the light shielding layer is arranged between the cathode layer and the packaging layer or the light shielding layer is formed on one side, far away from the first substrate, of the packaging layer.
4. The display panel according to claim 2,
the display substrate further comprises a touch electrode layer, a third insulating layer, a bridge layer and a fourth insulating layer which are sequentially arranged on the packaging layer; the display panel also comprises a plurality of touch signal lines which are used for sending touch driving signals to the touch electrodes of the touch electrode layer and/or receiving touch sensing signals output by the touch electrodes;
the first non-display area is also provided with a plurality of touch leads, and the touch leads are connected with the corresponding touch signal lines; the orthographic projection of the light shielding layer on the display substrate at least partially covers the touch lead.
5. The display panel according to claim 4,
the light shielding layer is arranged between the bridge spanning layer and the fourth insulating layer; or,
the light shielding layer is formed on one side, far away from the first substrate, of the fourth insulating layer.
6. The display panel according to claim 4, wherein the light shielding layer is multiplexed with the third insulating layer and/or the fourth insulating layer in the first non-display region.
7. The display panel according to claim 2,
the display panel further includes: a touch substrate; the touch substrate is arranged between the display substrate and the polarizer; the touch substrate comprises a second substrate, and a touch electrode layer, a fifth insulating layer, a bridge-spanning layer and a sixth insulating layer which are sequentially arranged on the second substrate; the touch electrode layer comprises touch electrodes arranged in an array; the display panel also comprises a plurality of touch signal lines which are used for sending touch driving signals to the touch electrodes and/or receiving touch sensing signals output by the touch electrodes; the first non-display area comprises a touch lead correspondingly connected with the touch signal line;
the touch control lead is covered by the orthographic projection of the light shielding layer on the display substrate.
8. The display panel according to claim 7, wherein the light-shielding layer is disposed between the touch electrode layer and the sixth insulating layer; or the light shielding layer is formed on one side of the sixth insulating layer far away from the first substrate.
9. The display panel according to claim 7, wherein the light shielding layer is multiplexed with the fifth insulating layer and/or the sixth insulating layer in the first non-display region.
10. The display panel according to claim 1, wherein a material of the light shielding layer comprises a light shielding material;
the light-shielding material includes at least one of carbon black, a black resin, and a black ink.
11. The display panel according to claim 10, wherein a mass ratio of the light-shielding material in the light-shielding layer is smaller than a mass ratio of the light-shielding material in the ink region; and the mass ratio of the shading material in the shading layer is larger than that of the shading material in the polaroid.
12. The display panel according to claim 11, wherein a ratio of the light-shielding material in the light-shielding layer gradually increases in a direction from the display region to the non-display region in a plane of the display panel substrate.
13. The display panel according to claim 1,
the value of the distance m1 between the third edge of the light shielding layer, which is far away from the display area, and the first edge of the ink area is as follows:
(ii) a Wherein,
；
；
a first incident angle formed on the light emergent side of the cover plate for the maximum visible sight line without light leakage;
a first refraction angle formed for an interface of the first incident angle between air and a light exit side of the cover plate;
a second refraction angle formed for the first refraction angle at an interface between the non-light-emitting side of the cover plate and air; b is the thickness of the polarizer; n1 is the refractive index of the cover plate; n2 is the refractive index of air;
the value of the distance m2 between the fourth edge of the light shielding layer close to the display area and the second edge of the polarizer is as follows: d3 is more than or equal to m2 and more than d1+ d2; wherein d1 is the absolute value of the maximum cutting error of the polarizer; d2 is the absolute value of the maximum attaching error of the polaroid; d3 is the distance between the second edge of the polarizer and the edge of the display area.
14. A display device comprising the display panel according to any one of claims 1 to 13.
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| WO2022178809A1 (en) * | 2021-02-26 | 2022-09-01 | 京东方科技集团股份有限公司 | Display substrate and manufacturing method therefor, and display apparatus |
| CN113013214B (en) * | 2021-02-26 | 2023-04-18 | 京东方科技集团股份有限公司 | Electronic device, display panel and preparation method thereof |
| CN113193136A (en) * | 2021-04-06 | 2021-07-30 | 深圳市华星光电半导体显示技术有限公司 | Display device and preparation method thereof |
| CN113299720B (en) * | 2021-05-25 | 2022-11-08 | 湖北长江新型显示产业创新中心有限公司 | Display panel and display device |
| CN113419376B (en) * | 2021-06-22 | 2022-11-25 | 京东方科技集团股份有限公司 | Polaroid and preparation method thereof, display module and display device |
| CN113690383A (en) * | 2021-08-05 | 2021-11-23 | 武汉华星光电半导体显示技术有限公司 | Display panel, display terminal and preparation method of display panel |
| CN114141143B (en) * | 2021-11-24 | 2023-07-25 | 武汉华星光电半导体显示技术有限公司 | Display panel, preparation method thereof and mobile terminal |
| WO2023151078A1 (en) * | 2022-02-14 | 2023-08-17 | 京东方科技集团股份有限公司 | Display panel and display device |
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| CN111459332A (en) * | 2020-03-30 | 2020-07-28 | 深圳市华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
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