CN110989862B - Display panel and manufacturing method thereof - Google Patents
Display panel and manufacturing method thereof Download PDFInfo
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- CN110989862B CN110989862B CN201911184218.6A CN201911184218A CN110989862B CN 110989862 B CN110989862 B CN 110989862B CN 201911184218 A CN201911184218 A CN 201911184218A CN 110989862 B CN110989862 B CN 110989862B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 54
- 239000002184 metal Substances 0.000 claims abstract description 209
- 239000000758 substrate Substances 0.000 claims abstract description 72
- 238000002955 isolation Methods 0.000 claims abstract description 20
- 239000011159 matrix material Substances 0.000 claims description 63
- 239000003086 colorant Substances 0.000 claims description 5
- 230000004888 barrier function Effects 0.000 claims 7
- 239000000463 material Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 4
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- 229920002120 photoresistant polymer Polymers 0.000 description 4
- 238000002834 transmittance Methods 0.000 description 4
- 238000001312 dry etching Methods 0.000 description 3
- 238000001755 magnetron sputter deposition Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
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- 229920005989 resin Polymers 0.000 description 2
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- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- 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
- H10K59/10—OLED displays
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- 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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
Abstract
The invention relates to the technical field of display panels, in particular to a display panel and a manufacturing method thereof, wherein the display panel comprises a substrate, a luminous display layer, a touch control layer and a color resistance layer, the luminous display layer is arranged on the substrate, and the luminous display layer comprises a plurality of first luminous units; the color resistance layer comprises a first sub-color resistance layer; the touch layer comprises a first metal layer and a second metal layer, a first sub-color resistance layer covers the first light-emitting unit and the first metal layer from one side far away from the substrate, and the first sub-color resistance layer covers at least part of the first metal layer and is used as an isolation cushion layer between the second metal layer and the first metal layer. The manufacturing steps of the display panel are few, the productivity is improved, the reflection of ambient light is reduced, and the contrast of the display panel is improved.
Description
Technical Field
The invention relates to the technical field of display panels, in particular to a display panel and a manufacturing method thereof.
Background
Along with the development of the information age and the acceleration of the life rhythm, the touch technology has been widely applied to various electronic products due to the characteristics of humanized design, simplicity, rapidness, and the like, wherein the capacitive touch screen has the advantages of high response speed, high sensitivity, good reliability, high durability, and the like.
An organic light emitting diode (Organic Light Emitting Diode, abbreviated as OLED) display device has the characteristics of self-luminescence, wide viewing angle, high luminous efficiency, low power consumption, quick response time, good low-temperature characteristics and the like. At present, an OLED display device with touch control generally adopts an embedded type to attach a touch screen to an OLED display panel.
Disclosure of Invention
In view of the above, the present invention mainly solves the technical problem of providing a display panel and a manufacturing method thereof, which can reduce the manufacturing process steps.
In order to solve the technical problems, the invention adopts a technical scheme that: the display panel comprises a substrate, a light-emitting display layer, a touch control layer and a color resistance layer, wherein the light-emitting display layer is arranged on the substrate and comprises a plurality of first light-emitting units; the color resistance layer comprises a first sub-color resistance layer; the touch layer comprises a first metal layer and a second metal layer, the first sub-color resistance layer covers the first light-emitting unit and the first metal layer from one side far away from the substrate, and at least part of the first sub-color resistance layer covers the first metal layer and is used as an isolation cushion layer between the second metal layer and the first metal layer.
On the one hand, the first sub-color resistance layer covers the first light-emitting unit, so that the display panel can reduce reflection of external environment light; on the other hand, the first sub-color resistance layer is used as an isolation cushion layer of the touch control layer, so that the short circuit of the touch control layer can be avoided; in still another aspect, the first color resist layer is used to cover the first light emitting unit and the first metal layer at the same time, so that the display panel does not need to manufacture the first sub-color resist layer covering the first light emitting unit and the insulating layer for avoiding short circuit between the first metal layer and the second metal layer step by step in the manufacturing process, and manufacturing steps can be reduced.
The display panel further comprises a black matrix layer, wherein the black matrix layer covers the touch control layer from the side far away from the substrate, so that projection of the black matrix layer on the substrate covers projection of the first metal layer and the second metal layer on the substrate. A black matrix layer is covered on the touch control layer, and can absorb external ambient light irradiated into the display panel, so that the reflection of the metal layer on the ambient light is reduced. The color resistance layer and the black matrix layer are combined with the luminous display layer, so that the display panel does not need to adopt a polaroid, and the display panel is thinner, is easy to bend and is easy to realize flexible display.
Further, the light-emitting display layer comprises a plurality of second light-emitting units and third light-emitting units, the color resistance layer comprises a second sub-color resistance layer and a third sub-color resistance layer, and the second sub-color resistance layer covers the second light-emitting units from one side far away from the substrate; the third sub-color resist layer covers the third light emitting unit from a side away from the substrate. The light emitting units of the light emitting display layer can be classified and fully covered, so that the reflection of external environment light is reduced to a large extent by the display panel.
The first light-emitting unit, the second light-emitting unit and the third light-emitting unit are used for generating primary color light with three different colors, and the colors of the first sub-color resistance layer, the second sub-color resistance layer and the third sub-color resistance layer, which allow transmitted light, are respectively the same as the light-emitting colors of the first light-emitting unit, the second light-emitting unit and the third light-emitting unit. The light transmittance of the three light emitting units is not affected or weakened, the light loss is reduced, the display brightness of the display panel is improved, and the color resistance layer can reduce the reflection of external environment light.
The display panel is provided with a display area, the first light-emitting unit, the second light-emitting unit and the third light-emitting unit are arranged in the display area, the first metal layer and the second metal layer are located in gaps among the first light-emitting unit, the second light-emitting unit and the third light-emitting unit, the first sub-color resistance layer fully covers the first metal layer in the display area, and the black matrix layer fully covers the second metal layer in the display area. The touch control layer does not influence the light transmittance of the display light-emitting unit.
Wherein one of the first metal layer and the second metal layer comprises a first touch electrode and a second touch electrode respectively arranged along a first direction and a second direction which are mutually intersected, the first touch electrode further comprises a plurality of electrode segments arranged at intervals along the first direction, and the second touch electrode is continuously arranged along the second direction from an interval area of the electrode segments;
the other one of the first metal layer and the second metal layer comprises a plurality of bridging electrodes arranged at the crossing positions of the first touch electrode and the second touch electrode, wherein the isolation cushion layer is provided with openings, so that two electrode segments arranged adjacently are respectively and electrically connected to the same bridging electrode through the openings, and further, the electric connection between the two electrode segments arranged adjacently is realized. The display panel provided by the invention can be suitable for the condition that the first touch electrode and the second touch electrode are in the same layer.
The first metal layer comprises a first touch electrode continuously arranged along a first direction, the second metal layer comprises a second touch electrode continuously arranged along a second direction crossing the first direction, and the isolation cushion layer electrically isolates the first touch electrode from the second touch electrode at the crossing position of the first touch electrode and the second touch electrode. The display panel provided by the invention can be suitable for the situation that the first touch electrode and the second touch electrode are two layers.
Wherein the black matrix layer covers the second metal layer from a side away from the substrate, or covers the second metal layer and the first metal layer not covered by the second metal layer. When the first metal layer is completely covered by the second metal layer, the black matrix layer can completely cover the touch control layer by covering the second metal layer, and reflection of the metal layer to external light is reduced to the maximum. When the first metal layer is not completely covered by the second metal layer, the black matrix layer simultaneously covers the second metal layer and the first metal layer which is not covered by the second metal layer, so that all the metal layers can be covered, and reflection of the metal layers to external environment light is reduced to the greatest extent.
The invention also comprises a second technical scheme, a manufacturing method of the display panel, and a manufacturing method of the display panel, wherein a first sub-color resistance layer is manufactured on a substrate containing a first metal layer and a light-emitting display layer, so that the first sub-color resistance layer covers at least part of the first metal layer and a first light-emitting unit of the light-emitting display layer;
and manufacturing a second metal layer on one side of the first sub-color resistance layer far away from the first metal layer, so that the second metal layer is isolated from the first metal layer through the first sub-color resistance layer. The manufacturing method of the display panel can reduce manufacturing steps and improve productivity.
Further, the method further comprises the step of manufacturing a black matrix layer on one side, far away from the substrate, of the second metal layer to cover the touch control layer, so that projection of the black matrix layer on the substrate covers projection of the first metal layer and the second metal layer on the substrate. The reflection of the metal layer of the touch layer on the external environment light can be further greatly reduced.
The manufacturing method of the display panel further comprises the step of manufacturing a second sub-color resistance layer on the light-emitting display layer to cover the second light-emitting unit of the light-emitting display layer. The second light-emitting unit of the light-emitting display layer can be covered, and reflection of the second light-emitting unit to external environment light is reduced.
The manufacturing method of the display panel further comprises the step of manufacturing a third sub-color resistance layer on the light-emitting display layer to cover the third light-emitting unit of the light-emitting display layer. The third light-emitting unit of the light-emitting display layer can be further covered, and reflection of the third light-emitting unit to external environment light is reduced.
It should be noted that, the fabrication of the second sub-color resist layer and the fabrication of the third sub-color resist layer may occur at any stage in the fabrication process of the display panel.
Wherein, the manufacturing of the black matrix layer covering touch layer on one side of the second metal layer far away from the substrate comprises the following steps: and manufacturing a black matrix layer on one side of the second metal layer far away from the substrate, wherein the black matrix layer covers the second metal layer, or the second metal layer and the first metal layer which is not covered by the second metal layer. When the first metal layer is completely covered by the second metal layer, the black matrix layer can completely cover the touch control layer by covering the second metal layer with the black matrix layer; when the first metal layer which is not covered by the second metal layer exists, the black matrix layer also covers the first metal layer which is not covered by the second metal layer, and the reflection of the display panel to the external environment light is reduced to the greatest extent.
The beneficial effects of the invention are as follows: in contrast to the prior art, in the display panel of the embodiment of the present invention, on one hand, the first sub-color resist layer covers the first light emitting unit, so that the display panel can reduce reflection of external ambient light; on the other hand, the first sub-color resistance layer is used as an isolation cushion layer of the touch control layer, so that the short circuit of the touch control layer can be avoided; in still another aspect, the first color resistance layer is used for covering the first light-emitting unit and the first metal layer simultaneously, so that the display panel does not need to manufacture the first sub-color resistance layer covering the first light-emitting unit and the insulating layer for avoiding the short circuit between the first metal layer and the second metal layer step by step in the manufacturing process, the manufacturing steps can be reduced, the productivity is improved, and meanwhile, the first sub-color resistance layer is used for covering at least part of the first light-emitting unit and the first metal layer, the reflection of the display panel to external environment light can be reduced, and the contrast of the display panel is improved.
Drawings
FIG. 1 is a schematic plan view of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of the display panel along the C-C fold line in the area A of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the display panel along line E-E in the area A of FIG. 1;
FIG. 4 is a schematic cross-sectional view of the display panel along the C-C fold line in the area A of FIG. 1;
FIG. 5 is a schematic cross-sectional view of the display panel along line E-E in the area A of FIG. 1;
FIG. 6 is a schematic cross-sectional view of the display panel along line E-E in the area A of FIG. 1;
FIG. 7 is a schematic cross-sectional view of the display panel along the C-C fold line in the area A of FIG. 1;
FIG. 8 is a schematic cross-sectional view of the display panel along line E-E in the area A of FIG. 1;
FIG. 9 is a schematic cross-sectional view of the display panel along line E-E in the area A of FIG. 1;
FIG. 10 is a schematic cross-sectional view of the display panel along the C-C fold line in the area A of FIG. 1;
fig. 11 is a schematic cross-sectional structure of an embodiment of a display panel in the prior art.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1 and 2, an embodiment of the present invention provides a display panel, which includes a substrate 1, a light emitting display layer 2, a touch layer 4, a color blocking layer 3, and a black matrix layer 5, wherein the light emitting display layer 2 is disposed on the substrate 1, and the light emitting display layer 2 includes a plurality of first light emitting units 21; the color resist layer 3 includes a first sub-color resist layer 31; the touch layer 4 includes a first metal layer 41 and a second metal layer 42, the first sub-color resist layer 31 covers the first light emitting unit 21 and the first metal layer 41 from a side away from the substrate 1, and the first sub-color resist layer 31 covers at least a portion of the first metal layer 41 to serve as an isolation pad layer 311 between the second metal layer 42 and the first metal layer 41.
In the embodiment of the present invention, the first light emitting unit 21 and the first metal layer 41 are covered by the first sub-color resist layer 31, on one hand, the reflection of the external ambient light can be reduced by the display panel because the first light emitting unit 21 is covered by the part 312 of the first sub-color resist layer 31; on the other hand, the first sub-color resistance layer 31 is adopted as the isolation cushion layer 311 of the touch control layer 4, so that the touch control layer 4 can be prevented from being shorted; in still another aspect, the first sub-color resist layer 31 is used to cover the first light emitting unit 21 and the first metal layer 41 at the same time, so that the display panel does not need to manufacture the first sub-color resist layer 31 covering the first light emitting unit 21 and an insulating layer for avoiding short circuit between the first metal layer 41 and the second metal layer 42 step by step in the manufacturing process, the manufacturing steps can be reduced, and meanwhile, at least part of the first light emitting unit 21 and the first metal layer 41 is covered by the first sub-color resist layer 31, the reflection of the display panel to external environment light can be reduced, and the contrast ratio of the OLED display panel is improved.
In the embodiment of the present invention, the light emitting display layer 2 includes a plurality of light emitting units arranged in an array. In one embodiment, the light emitting display layer 2 specifically includes a light emitting unit and an encapsulation layer covering the light emitting unit. The light emitting unit comprises an anode layer, an organic light emitting layer, a cathode layer and the like; the package layer includes an inorganic thin film package layer and an organic thin film package layer which are stacked, and the specific structure and materials of the light emitting display layer 2 are not limited in the present invention, and may be set according to the display mode of the display panel.
The middle substrate 1 of the embodiment of the present invention may include a substrate base plate and a pixel circuit array disposed on the substrate base plate.
As a preferred embodiment of the present invention, the display panel further comprises a black matrix layer 5, wherein the black matrix layer 5 covers the touch layer 4 from a side away from the substrate 1, such that the projection of the black matrix layer 5 on the substrate 1 covers the projections of the first metal layer 41 and the second metal layer 42 on the substrate 1. According to the embodiment of the invention, the black matrix layer 5 is covered on the touch control layer 4, so that the black matrix layer 5 can absorb external environment light irradiated into the display panel, and the reflection of the first metal layer 41 and the second metal layer 42 on the environment light is reduced.
Further, the light emitting display layer 2 includes a plurality of second light emitting units 22 and third light emitting units 23, and the color resist layer 3 includes a second sub-color resist layer 32 and a third sub-color resist layer (not shown), the second sub-color resist layer 32 covering the second light emitting units 22 from a side away from the substrate 1; the third sub-color resist layer covers the third light emitting unit 23 from a side away from the substrate 1. According to the embodiment of the invention, the first sub-color resistance layer 31, the second sub-color resistance layer 32 and the third sub-color resistance layer are adopted to cover the first light-emitting unit 21, the second light-emitting unit 22 and the third light-emitting unit 23 of the light-emitting display layer 2 respectively, so that the light-emitting units of the light-emitting display layer 2 can be completely covered in a classified manner, and the reflection of external environment light is reduced to a greater extent by the display panel. According to the embodiment of the invention, the light-emitting display layer 2 and the touch control layer 4 are shielded by combining the color resistance layer 3 and the black matrix layer 5, so that a polaroid is not required to be adopted for the display panel, and the display panel is thinner, easy to bend and easy to realize flexible display.
Wherein the first light emitting unit 21, the second light emitting unit 22 and the third light emitting unit 23 are used for generating three primary colors of light, and the first sub-color resist layer 31, the second sub-color resist layer 32 and the third sub-color resist layer allow the color of the transmitted light to be the same as the light emitting color of the first light emitting unit 21, the second light emitting unit 22 and the third light emitting unit 23, respectively. When the color resistance layer 3 covers the three light-emitting units of the light-emitting display layer 2, the transmittance of light emitted by the three light-emitting units is not affected or weakened, the light loss is reduced, the display brightness of the OLED display panel is improved, and meanwhile, the reflection of external environment light can be reduced by the color resistance layer 3. Wherein as a preferred embodiment of the present invention the first light emitting unit 21 emits green light, the second light emitting unit 22 emits blue light and the third light emitting unit 23 emits red light. The first sub-color resist layer 31 allows the color of the transmitted light to be green; the second sub-color resist layer 31 allows the color of the transmitted light to be blue; the second sub-color resist layer 31 allows the color of the transmitted light to be red. As a modification, the first light emitting unit 21 may emit blue light or red light, and the second light emitting unit 22 and the third light emitting unit 23 may emit any one of blue light or green light, respectively; the first, second and third sub-color resist layers 31, 32 and 23 allow the color of the transmitted light to be adjusted correspondingly to the first, second and third light emitting units 21, 22 and 23.
As shown in fig. 1 and 2, the display panel is provided with a display area, in which the first light emitting unit 21, the second light emitting unit 22, and the third light emitting unit 23 are arranged, and the first metal layer 41 and the second metal layer 42 are located at a gap between the first light emitting unit 21, the second light emitting unit 22, and the third light emitting unit 23. The touch layer 4 is disposed in the display area, and the first metal layer 41 and the second metal layer 42 do not cover the first light emitting unit 21, the second light emitting unit 22 and the third light emitting unit 23, and the light transmittance of the display light emitting unit is not affected by the first metal layer 41 and the second metal layer 42.
In an embodiment of the present invention, the second metal layer 42 includes a first touch electrode 43 and a second touch electrode 44 disposed along a first direction D1 and a second direction D2 intersecting each other, the first touch electrode 43 further includes a plurality of electrode segments 431 disposed along the first direction D1 at intervals, and the second touch electrode 44 is disposed continuously along the second direction D2 from an interval region of the electrode segments 431; in this embodiment, the first direction D1 and the second direction D2 are perpendicular to each other, and in other embodiments, the included angle between the first direction D1 and the second direction D2 may be other angles, which is not particularly limited in the present invention.
As shown in fig. 2 and 3, the first metal layer 41 includes a plurality of bridge electrodes 45 disposed at the crossing positions of the first touch electrode 43 and the second touch electrode 44, wherein the isolation pad layer 311 is provided with openings, so that two electrode segments 431 disposed adjacently are electrically connected to the same bridge electrode 45 through the openings, respectively, and further, electrical connection between the two electrode segments 431 disposed adjacently is achieved.
In this embodiment, the first metal layer 41 is disposed on the side of the light emitting display layer 2 away from the substrate 1, the first sub-color resist layer 31 fully covers the first light emitting unit 21 and the first metal layer 41, the black matrix layer 5 covers the second metal layer 42 and the gap between the adjacent electrode segment 431 and the second touch electrode 44 from the side of the light emitting display layer 2 away from the substrate 1, so that the black matrix layer 5 can cover the touch layer 4, and the projection of the black matrix layer 5 on the substrate 1 covers the projections of the first metal layer 41 and the second metal layer 42 on the substrate 1, in this embodiment, the black matrix layer 5 covers the touch layer 4 to reduce the reflection of the first metal layer 41 and the second metal layer 42 in the touch layer 4 to the external ambient light.
In another embodiment of the present invention, as shown in fig. 1, 4 and 5, the first metal layer 41 includes a first touch electrode 43 and a second touch electrode 44 disposed along a first direction D1 and a second direction D2 intersecting each other, respectively, the first touch electrode 43 further includes a plurality of electrode segments 431 disposed at intervals along the first direction, and the second touch electrode 44 is continuously disposed along the second direction D2 from an interval region of the electrode segments 431; in this embodiment, the first direction D1 and the second direction D2 are perpendicular to each other, and in other embodiments, the included angle between the first direction D1 and the second direction D2 may be other angles, which is not particularly limited in the present invention.
The second metal layer 42 includes a plurality of bridging electrodes 45 disposed at the crossing positions of the first touch electrode 43 and the second touch electrode 44, wherein the isolation pad layer 311 is provided with openings, so that two electrode segments 431 disposed adjacently are electrically connected to the same bridging electrode 45 through the openings, respectively, and further, electrical connection between the two electrode segments 431 disposed adjacently is achieved.
In this embodiment, the first metal layer 41 is disposed on the side of the light emitting display layer 2 away from the substrate 1, the first sub-color resist layer 31 fully covers the first light emitting unit 21 (see fig. 4), and the first metal layer 41 is partially covered (see fig. 5), that is, the first sub-color resist layer 31 is disposed at the crossing position of the first touch electrode 43 and the second touch electrode 44 to cover the portion of the electrode segment 431, the gaps between the two electrode segments 431 and the bridge electrode 45 that are adjacently disposed, and the first light emitting unit 21, and the area of the first sub-color resist layer 31 covering the first metal layer 41 may enable forming an opening on the first sub-color resist layer 31, so that the two electrode segments 431 that are adjacently disposed can be electrically connected to the same bridge electrode 45 through the opening. Preferably, the black matrix layer 5 covers the second metal layer 42 and the first metal layer 41 uncovered by the second metal layer 42 from a side far from the substrate 1, so that the black matrix layer 5 covers the touch layer 4 from a side far from the substrate 1, and the projection of the black matrix layer 5 on the substrate 1 covers the projections of the first metal layer 41 and the second metal layer 42 on the substrate 1, thereby minimizing the reflection of the metal layers to the external environment light.
As a modification, the first sub-color resist layer 31 may also fully cover the first light emitting unit 21 (see fig. 4) and the first metal layer 41 (see fig. 6), where, as further shown in fig. 6, the first sub-color resist layer 31 located between the crossing position of the first touch electrode 43 and the second touch electrode 44 and the bridging electrode 45 is an isolation pad layer 311; the black matrix layer 5 covers the second metal layer 42 and the first sub-color resist layer 31, which is not covered by the second metal layer 42 and is in contact with the first metal layer 41, from a side away from the substrate 1, such that the black matrix layer 5 covers the touch layer 4 from a side away from the substrate 1, and the projection of the black matrix layer 5 onto the substrate 1 covers the projections of the first metal layer 41 and the second metal layer 42 onto the substrate 1. The reflection of the metal layer to the external ambient light is reduced by the black matrix layer 5 and the combination of the black matrix layer 5 and the first sub-color resist layer 31.
In yet another embodiment of the present invention, as shown in fig. 1, 7 and 8, the first metal layer 41 includes a first touch electrode 43 continuously disposed along a first direction D1, the second metal layer 42 includes a second touch electrode 44 continuously disposed along a second direction D2 intersecting the first direction D1, and the isolation pad layer 311 electrically isolates the first touch electrode 43 and the second touch electrode 44 at an intersecting position of the first touch electrode 43 and the second touch electrode 44. In this embodiment, the first touch electrode 43 and the second touch electrode 44 are two layers, and the isolation pad layer 311 can prevent the first touch electrode 43 and the second touch electrode 44 from being shorted at the crossing position. In this embodiment, the first direction D1 and the second direction D2 are perpendicular, and in other embodiments, the first direction D1 and the second direction D2 may be other included angles.
The first sub-color resist layer 31 fully covers the first light emitting unit 21, and the first sub-color resist layer 31 partially covers the first metal layer 41 (see fig. 8), i.e., the first sub-color resist layer 31 is disposed at the crossing position of the first touch electrode 43 and the second touch electrode 44 and is located between the first touch electrode 43 and the second touch electrode 44 and on the first light emitting unit 21. Preferably, the black matrix layer 5 covers the second metal layer 42 and the first metal layer 41 uncovered by the second metal layer 42 from a side far from the substrate 1, so that the black matrix layer 5 covers the touch layer 4 from a side far from the substrate 1, and the projection of the black matrix layer 5 on the substrate 1 covers the projections of the first metal layer 41 and the second metal layer 42 on the substrate 1, thereby minimizing the reflection of the metal layers to the external environment light.
As shown in fig. 9, as a modification, the first sub-color resist layer 31 may also fully cover the first light emitting unit 21 and the first metal layer 41, where the first sub-color resist layer 31 located at the crossing position of the first touch electrode 43 and the second touch electrode 44 is the isolation pad layer 311; the black matrix layer 5 covers the second metal layer 42 and the first sub-color resist layer 31, which is not covered by the second metal layer 42 and is in contact with the first metal layer 41, from a side away from the substrate 1, such that the black matrix layer 5 covers the touch layer 4 from a side away from the substrate 1, and the projection of the black matrix layer 5 onto the substrate 1 covers the projections of the first metal layer 41 and the second metal layer 42 onto the substrate 1. The black matrix layer 5 is combined with the first sub-color resist layer 31 and the reflection of the metal layer to the external environment light is reduced by the black matrix layer 5.
The display panel of the embodiment of the invention further comprises a planarization layer 6, wherein the planarization layer 6 is arranged on the black matrix layer 5, the color resistance layer 3 and the touch control layer 4. The display panel of the embodiment of the invention can protect the touch layer 4 by further arranging the planarization layer 6.
As shown in fig. 10, the display panel of the embodiment of the invention further includes a buffer layer 7, wherein the buffer layer 7 is disposed between the light emitting display layer 2 and the touch control layer 4.
The invention also comprises a second technical scheme, a manufacturing method of the display panel, which comprises the following steps:
s100: on the substrate 1 containing the first metal layer 41 and the light emitting display layer 2, the first sub-color resist layer 31 is fabricated such that the first sub-color resist layer 31 covers at least part of the first metal layer 41 and the first light emitting unit 21 of the light emitting display layer 2.
The first metal layer 41 may be formed by magnetron sputtering a layer of negative photoresist coated on the metal layer, exposing the metal layer with a mask to form a patterned cured photoresist, and dry etching. The first metal layer 41 of the embodiment of the present invention is not limited to the above-described manufacturing method.
On the light emitting display layer 2 and the first metal layer 41, a layer of a first sub-color resist material is coated, wherein the first sub-color resist material may be a composite of pigment and resin, and exposure is performed by using a mask to form a patterned first sub-color resist layer 31, so that the first sub-color resist layer 31 covers at least a portion of the first metal layer 41 and the first light emitting unit 21 of the light emitting display layer 2.
S200: a second metal layer 42 is formed on the side of the first sub-color resist layer 31 away from the first metal layer 41, such that the isolation pad 311 is formed between the second metal layer 42 and the first metal layer 41 through the first sub-color resist layer 31.
Specifically, the second metal layer 42 may be formed by magnetron sputtering metal to form a metal layer, coating a layer of negative photoresist on the metal layer, exposing with a mask to form a patterned cured photoresist, and dry etching to form the second metal layer 42.
As a preferred solution, the first metal layer 41 includes a first touch electrode 43 continuously disposed along a first direction D1, the second metal layer 42 includes a second touch electrode 44 continuously disposed along a second direction D2 intersecting the first direction D1, and the isolation pad layer 311 electrically isolates the first touch electrode 43 and the second touch electrode 44 at an intersecting position of the first touch electrode 43 and the second touch electrode 44.
As another preferred aspect, when either the second metal layer 42 or the first metal layer 41 includes the first touch electrode 43 and the second touch electrode 44 disposed along the first direction D1 and the second direction D2 crossing each other, respectively, the first touch electrode 43 further includes a plurality of electrode segments 431 disposed at intervals along the first direction, and the second touch electrode 44 is continuously disposed along the second direction D2 from the interval region of the electrode segments 431; when the other of the first metal layer 41 and the second metal layer 42 includes a plurality of bridging electrodes 45 disposed at the crossing positions of the first touch electrode 43 and the second touch electrode 44, holes are first formed in the isolation pad layer 311 of the first sub-color resist layer 31 before the second metal layer 42 is fabricated, and the second metal layer 42 is formed by magnetron sputtering, exposure and dry etching, so that two electrode segments 431 disposed adjacently are electrically connected to the same bridging electrode 45 through the holes, respectively, thereby achieving electrical connection between the two electrode segments 431 disposed adjacently.
The manufacturing method of the display panel can reduce one mask manufacturing step and improve the productivity.
Preferably, the manufacturing method of the display panel further comprises: s300: a black matrix layer 5 is fabricated on a side of the touch layer 4 away from the substrate 1 to cover the touch layer 4, such that the projection of the black matrix layer 5 on the substrate 1 covers the projections of the first metal layer 41 and the second metal layer 42 on the substrate 1.
Specifically, a black matrix layer 5 material is coated, where the black matrix layer 5 material may be a composite of a black pigment and a resin, and exposure is performed by using a mask to form a patterned black matrix layer 5, so that the black matrix layer 5 covers the touch layer 4.
Further, the manufacturing method of the display panel further comprises the following steps:
step 400: a second sub-color resist layer 32 is formed on the light-emitting display layer 2 to cover the second light-emitting cells 22 of the light-emitting display layer 2. Specifically, a patterned second sub-color resist layer 32 is formed by coating a layer of second sub-color resist material and exposing the same with a mask, so that the second sub-color resist layer 32 covers the second light emitting units 22 of the light emitting display layer 2.
Step 500: a third sub-color resist layer is formed on the light-emitting display layer 2 to cover the third light-emitting cells 23 of the light-emitting display layer 2. Specifically, a patterned third sub-color resist layer is formed by coating a layer of third sub-color resist material and exposing the material with a mask, so that the third sub-color resist layer covers the third light emitting unit 23 of the light emitting display layer 2.
Further, the method further comprises the step 600 of: the planarization layer 6 is made, wherein the planarization layer 6 is a transparent organic polymer material, and can be formed by coating.
It should be noted that, the steps 400 and 500 may occur in any step before the step 600 of the display panel manufacturing process. For example: the manufacturing method of the display panel comprises the steps of S100, S400, S200, S300, S500 and S600 in sequence; or S500, S100, S200, S300, S400 and S600; the above combinations are illustrative only and not exhaustive.
In step S300, when the first metal layer 41 is not completely covered by the second metal layer 42, the black matrix layer 5 is formed to cover the second metal layer 42 and the first metal layer 41 not covered by the second metal layer 42. When the first metal layer 41 is completely covered with the second metal layer 42, the black matrix layer 5 may cover the second metal layer 42.
In step S100, the first sub-color resist layer 31 is fabricated such that the first sub-color resist layer 31 covers at least a portion of the first metal layer 41 and the first light emitting unit 21 of the light emitting display layer 2, wherein the first sub-color resist layer 31 may cover all of the first metal layer 41 or may cover a portion of the first metal layer 41, as long as it can serve as the spacer layer 311 between the first metal layer 41 and the second metal layer 42.
In the method for manufacturing a display panel according to the embodiment of the present invention, in step 100, when the first metal layer 41 is manufactured, when the first sub-color resist layer 31 is manufactured, one mask is required to be used for etching, and in steps 200 to 600, each step is required to be used for etching. The manufacturing method of the display panel of the embodiment of the invention needs seven masks for manufacturing.
In the conventional art, when the color resist layer 3 and the black matrix layer 5 are simply combined with the substrate 1 including the light emitting display layer 2, as shown in fig. 11, the following steps are generally included:
s10: manufacturing a first metal layer 41 on the light emitting display layer 2 on the substrate 1;
s20: a side insulating layer 46 is formed on the first metal layer 41;
s30: manufacturing a second metal layer 42 on one side of the insulating layer 46 far away from the substrate 1, wherein the second metal layer 42 covers the luminous display layer 2 and at least part of the insulating layer 46 to form a touch control layer 4;
s40: forming a first planarization layer 61 on the touch layer 4;
s50: manufacturing a black matrix layer 5 on the first planarization layer 61 corresponding to the first metal layer 41 and the second metal layer 42 of the touch layer 4;
s60: respectively manufacturing a first sub-color resist layer 31, a second sub-color resist layer 32 and a third sub-color resist layer 33 to cover the first light emitting unit, the second light emitting unit and the third light emitting unit of the light emitting display layer 2;
s70: the second planarization layer 62 is formed to cover the first sub-color resist layer 31, the second sub-color resist layer 32, and the third sub-color resist layer 33.
In the step S60, three masks are required to be manufactured, and one mask is required for each of the rest steps, so that nine mask process steps are required when the color resistance layer 3 and the black matrix layer 5 are simply combined with the light-emitting display layer 2 to reach the display panel to reduce the reflection of external ambient light. The display panel of the embodiment of the invention only needs seven masks, so that two mask process steps can be reduced, the manufacturing steps are simplified, and the productivity is improved. Compared with the conventional simple combination scheme of the color resistance layer 3, the black matrix layer 5 and the luminous display layer 2, the display panel manufactured by the embodiment of the invention can reduce at least one planarization layer, and can reduce the thickness of the display panel.
The foregoing is only the embodiments of the present invention, and therefore, the patent scope of the invention is not limited thereto, and all equivalent structures or equivalent processes using the descriptions of the present invention and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the invention.
Claims (9)
1. A display panel, comprising: a substrate (1), a luminous display layer (2), a touch control layer (4) and a color resistance layer (3),
wherein the light-emitting display layer (2) is arranged on the substrate (1), and the light-emitting display layer (2) comprises a plurality of first light-emitting units (21);
the color resist layer (3) comprises a first sub-color resist layer (31);
the touch layer (4) comprises a first metal layer (41) and a second metal layer (42), the first sub-color resist layer (31) covers the first light emitting unit (21) and the first metal layer (41) from the side far away from the substrate (1), and the first sub-color resist layer (31) covers at least part of the first metal layer (41) for being used as an isolation cushion layer (311) between the second metal layer (42) and the first metal layer (41);
the display panel comprises a black matrix layer (5), the black matrix layer (5) covering the touch layer (4) from a side remote from the substrate (1) such that the projection of the black matrix layer (5) onto the substrate (1) covers the projections of the first metal layer (41) and the second metal layer (42) onto the substrate (1).
2. The display panel according to claim 1, characterized in that the light emitting display layer (2) comprises a plurality of second light emitting units (22) and third light emitting units (23), the color barrier layer (3) comprises a second sub-color barrier layer (32) and a third sub-color barrier layer, the second sub-color barrier layer (32) covering the second light emitting units (22) from a side remote from the substrate (1); the third sub-color resist layer covers the third light emitting unit (23) from a side away from the substrate (1).
3. A display panel according to claim 2, characterized in that the first light emitting unit (21), the second light emitting unit (22) and the third light emitting unit (23) are arranged to generate primary light of three different colors, the first sub-color barrier layer (31), the second sub-color barrier layer (32) and the third sub-color barrier layer allowing the color of the transmitted light to be the same as the light emitting color of the first light emitting unit (21), the second light emitting unit (22) and the third light emitting unit (23), respectively.
4. The display panel according to claim 1, wherein one of the first metal layer (41) and the second metal layer (42) includes a first touch electrode (43) and a second touch electrode (44) disposed along a first direction (D1) and a second direction (D2) intersecting each other, respectively, the first touch electrode (43) including a plurality of electrode segments (431) disposed at intervals along the first direction (D1), the second touch electrode (44) being disposed continuously along the second direction (D2) from an interval region of the electrode segments (431);
the other of the first metal layer (41) and the second metal layer (42) comprises a plurality of bridging electrodes (45) arranged at the crossing positions of the first touch electrode (43) and the second touch electrode (44), wherein an opening is arranged on the isolation cushion layer (311), so that two electrode segments (431) which are adjacently arranged are respectively and electrically connected to the same bridging electrode (45) through the opening, and further the electrical connection between the two electrode segments (431) which are adjacently arranged is realized.
5. The display panel according to claim 1, wherein the first metal layer (41) includes a first touch electrode (43) continuously disposed along a first direction (D1), the second metal layer (42) includes a second touch electrode (44) continuously disposed along a second direction (D2) intersecting the first direction (D1), and the isolation pad layer (311) electrically isolates the first touch electrode (43) and the second touch electrode (44) at an intersecting position of the first touch electrode (43) and the second touch electrode (44).
6. A display panel according to claim 1, characterized in that the black matrix layer (5) covers the second metal layer (42) from a side remote from the substrate (1), or covers the second metal layer (42) and the first metal layer (41) not covered by the second metal layer (42).
7. A method of manufacturing a display panel according to any of the claims 1-6, characterized in that a first sub-color resist layer (31) is manufactured on a substrate (1) comprising a first metal layer (41), a light emitting display layer (2), such that the first sub-color resist layer (31) covers at least part of the first metal layer (41) and a first light emitting unit (21) of the light emitting display layer (2);
and manufacturing a second metal layer (42) on one side of the first sub-color resistance layer (31) away from the first metal layer (41), so that the second metal layer (42) is isolated from the first metal layer (41) through the first sub-color resistance layer (31), and the touch control layer (4) is formed by the first metal layer (41) and the second metal layer (42).
8. The manufacturing method according to claim 7, further comprising manufacturing a black matrix layer (5) on a side of the touch layer (4) remote from the substrate (1) to cover the touch layer (4), such that a projection of the black matrix layer (5) on the substrate (1) covers a projection of the first metal layer (41) and the second metal layer (42) on the substrate (1).
9. The manufacturing method according to claim 7 or 8, further comprising manufacturing a second sub-color resist layer (32) on a side of the light emitting display layer (2) remote from the substrate (1), the second sub-color resist layer (32) covering a second light emitting unit (22) of the light emitting display layer (2); and manufacturing a third sub-color resistance layer on one side of the light-emitting display layer (2) far away from the substrate (1), wherein the third sub-color resistance layer covers a third light-emitting unit (23) of the light-emitting display layer (2).
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| CN111580695B (en) * | 2020-04-29 | 2023-07-04 | 上海天马微电子有限公司 | Display panel, manufacturing method thereof and display device |
| CN111580698B (en) * | 2020-05-11 | 2023-10-10 | 京东方科技集团股份有限公司 | Touch panel, preparation method thereof and display panel |
| CN112117313B (en) * | 2020-09-10 | 2024-01-19 | 武汉华星光电半导体显示技术有限公司 | Display screen and electronic equipment |
| CN112071825B (en) * | 2020-09-17 | 2022-12-20 | 合肥维信诺科技有限公司 | Display panel and display device |
| CN114201070A (en) * | 2021-11-12 | 2022-03-18 | 广州国显科技有限公司 | Touch display panel |
| CN115172626A (en) * | 2022-06-24 | 2022-10-11 | 合肥维信诺科技有限公司 | Display panel and display device |
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