CN109119453B - Display panel, manufacturing method thereof and display device - Google Patents
Display panel, manufacturing method thereof and display device Download PDFInfo
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- CN109119453B CN109119453B CN201811113523.1A CN201811113523A CN109119453B CN 109119453 B CN109119453 B CN 109119453B CN 201811113523 A CN201811113523 A CN 201811113523A CN 109119453 B CN109119453 B CN 109119453B
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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
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
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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
Abstract
The invention discloses a display panel, a manufacturing method thereof and a display device. The display panel includes: the first substrate and the second substrate are oppositely arranged; the first substrate comprises a first flexible substrate, a display layer and a packaging layer which are sequentially arranged, the display layer comprises a plurality of light-emitting units, the display layer further comprises a pixel definition layer, the pixel definition layer is provided with a plurality of first openings, and the light-emitting units are located in the first openings; the second substrate includes: the touch color film composite layer is positioned on one side, close to the packaging layer, of the second flexible substrate; the touch color film composite layer comprises: the color resistor is arranged corresponding to the light-emitting unit in the direction vertical to the display panel; the black matrix is provided with a plurality of second openings, and the second openings expose the color resistors; in the direction perpendicular to the display panel, the orthographic projection of the black matrix on the plane where the touch electrode is located covers the touch electrode, and the touch electrode is made of Metal Mesh material. The invention is beneficial to thinning the display panel and improving the flexibility.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel, a manufacturing method thereof and a display device.
Background
In the conventional display device technology, the display panel is mainly divided into two mainstream technologies, namely a liquid crystal display panel and an organic light emitting display panel. The liquid crystal display panel forms an electric field capable of controlling the deflection of liquid crystal molecules by applying voltage on the pixel electrode and the common electrode, and further controls the transmission of light rays to realize the display function of the display panel; the organic light-emitting display panel adopts an organic electroluminescent material, and when current passes through the organic electroluminescent material, the luminescent material can emit light, so that the display function of the display panel is realized.
The organic light emitting display panel has advantages of self-luminescence, ultra-thinness, high contrast, ultra-wide viewing angle, low power consumption, high display brightness, bright color, and capability of manufacturing flexible display, and the like, and is a key point of attention. At present, light and thin display panels and display devices have become the development direction of future display technologies.
Therefore, it is an urgent technical problem to be solved in the art to provide a thin display panel, a method for manufacturing the same, and a display device.
Disclosure of Invention
In view of the above, the present invention provides a display panel, a manufacturing method thereof and a display device, which solve the above technical problems.
In a first aspect, to solve the above problems, the present invention provides a display panel including: the first substrate and the second substrate are oppositely arranged;
the first substrate comprises a first flexible substrate, a display layer and an encapsulation layer which are sequentially arranged, wherein the display layer comprises a plurality of light-emitting units, the display layer further comprises a pixel definition layer, the pixel definition layer is provided with a plurality of first openings, and the light-emitting units are positioned in the first openings;
the second substrate includes: the touch color film composite layer is positioned on one side, close to the packaging layer, of the second flexible substrate; wherein, touch-control various membrane composite layer includes:
the color resistor is arranged corresponding to the light-emitting unit in the direction vertical to the display panel;
the black matrix is provided with a plurality of second openings, and the second openings expose the color resistors;
touch electrode, in the direction perpendicular to the display panel, the black matrix is on the plane of the touch electrode
The orthographic projection of the surface covers a touch electrode, and the touch electrode is made of Metal Mesh material.
In a second aspect, to solve the above problem, the present invention provides a display device including any one of the display panels proposed by the present invention.
In order to solve the above problem, the present invention provides a method for manufacturing a display panel, including:
manufacturing a first flexible substrate on a first supporting plate;
manufacturing a display layer on a first flexible substrate, wherein the display layer comprises a plurality of light-emitting units and a pixel definition layer, the pixel definition layer is provided with a plurality of first openings, and the light-emitting units are positioned in the first openings;
manufacturing a packaging layer on the display layer to obtain a first substrate with a first supporting plate;
manufacturing a second flexible substrate on a second support plate;
manufacturing a touch color film composite layer on a second flexible substrate to obtain a second substrate with a second supporting plate; wherein, touch-control various membrane composite layer includes: the touch control device comprises a black matrix, a color resistor and a touch control electrode, wherein the black matrix is provided with a plurality of second openings, the second openings comprise the color resistor, the touch control electrode is made of Metal Mesh material, and the orthographic projection of the black matrix on the plane where the touch control electrode is located covers the touch control electrode;
aligning and attaching a first substrate with a first supporting plate and a second substrate with a second supporting plate;
and laser stripping the first support plate and the second support plate.
Compared with the prior art, the display panel, the manufacturing method thereof and the display device provided by the invention at least realize the following beneficial effects:
in the display panel provided by the invention, the color resistor is adopted to replace a circular polarizer to play a role in preventing the reflection of ambient light, the thickness of the color resistor is usually not more than 20 microns, the thickness of the color resistor is far less than that of the circular polarizer, the thickness reduction of the display panel is facilitated, and the circular polarizer with high brittleness is not adopted, so that the flexibility of the display panel is also facilitated to be improved. The touch color film composite layer is arranged, the touch electrode is integrated with the color resistor and the black matrix, and the touch electrode film made of Metal Mesh material is thin in thickness, so that the display panel can be thinned further, and the flexibility is improved. In addition, the orthographic projection of the black matrix on the plane where the touch electrode is located covers the touch electrode, and the design of the touch electrode in the touch color film composite layer does not influence the aperture opening ratio of the display panel.
Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a film structure diagram of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic top view of a display panel according to an embodiment of the invention;
fig. 3 is a diagram of a film structure of an alternative embodiment of a display panel according to an embodiment of the present invention;
fig. 4 is a film structure diagram of another alternative embodiment of a display panel according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of light paths of light emitted from light emitting units in a display panel;
FIG. 6 is a simplified cross-sectional diagram of a display panel;
FIG. 7 is a simplified diagram of a display panel according to the present invention;
fig. 8 is a film structure diagram of another alternative embodiment of a display panel according to an embodiment of the present invention;
fig. 9 is a film structure diagram of another alternative embodiment of a display panel according to an embodiment of the present invention;
fig. 10 is a film structure diagram of another alternative embodiment of a display panel according to an embodiment of the present invention;
FIG. 11 is a schematic view of a display device according to an embodiment of the present invention;
fig. 12 is a flowchart of a method for manufacturing a display panel according to an embodiment of the invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a film structure diagram of a display panel according to an embodiment of the present invention. Fig. 2 is a schematic top view of a display panel according to an embodiment of the invention.
As shown in fig. 1, the display panel includes: a first substrate 11 and a second substrate 12 disposed opposite to each other; the first substrate 11 includes a first flexible substrate 111, a display layer 112, and an encapsulation layer 113, which are sequentially disposed, wherein the display layer 112 includes a plurality of light emitting cells 1121, the display layer 112 further includes a pixel definition layer 1122, the pixel definition layer 1122 has a plurality of first openings K1, and the light emitting cells 1121 are located in the first openings K1. The second substrate 12 includes: a second flexible substrate 121 and a touch color film composite layer 122, wherein the touch color film composite layer 122 is located on one side of the second flexible substrate 121 close to the encapsulation layer 113; the touch color film composite layer 122 includes: a color resistor 1221, wherein the color resistor 1221 is disposed corresponding to the light emitting unit 1121 in a direction perpendicular to the display panel; a black matrix 1222, the black matrix 1222 having a plurality of second openings K2, the second openings K2 exposing the color resistors 1221; and the touch electrode 1223 is arranged in a direction perpendicular to the display panel, an orthographic projection of the black matrix 1222 on the plane where the touch electrode 1223 is located covers the touch electrode 1223, and the touch electrode 1223 is made of Metal Mesh material. Metal Mesh, i.e. Metal Mesh, has low resistance and good conductivity, and the conductive layer made of the Metal Mesh can be thinner than that made of conventional indium tin oxide. The touch color film composite layer 122 in fig. 1 is only schematically shown, wherein the touch electrode 1223 may be located on the side of the black matrix 1222 away from the first substrate 11, or as shown in fig. 1, the touch electrode 1223 may be located on the side of the black matrix 1222 close to the first substrate 11.
As shown in fig. 2, the display panel includes a display area AA and a non-display area BA, wherein the light emitting unit 1121 is located in the display area AA, the light emitting unit 1121 (not shown in the figure) is disposed corresponding to the color resistor 1221, and when the display panel is viewed directly, the light emitting unit 1121 is located below the color resistor 1221. The black matrix 1222 has a plurality of second openings K2, the second opening K2 exposes the color resistors 1221, and the light emitted from the light emitting unit 1121 passes through the color resistors 1221 to exit from the second openings K2 of the black matrix 1222.
The display panel provided by the invention can be used for manufacturing the first substrate and the second substrate respectively during manufacturing, and then the first substrate and the second substrate are aligned and attached. For example, when the first substrate is manufactured, the first flexible substrate is manufactured first, then the display layer is manufactured on the first flexible substrate, and then the encapsulation layer is manufactured on the display layer, wherein the encapsulation layer is used for preventing the light-emitting unit in the display layer from being damaged by water and oxygen, and the service life of the light-emitting unit is ensured. For example, when the second substrate is manufactured, the second flexible substrate is manufactured first, then the touch color film composite layer is manufactured on the second flexible substrate, wherein the black matrix may be manufactured first, then the color resistor is manufactured after the black matrix process, and then the touch electrode layer is manufactured. And finally, attaching the manufactured first substrate and the second substrate.
However, the circular polarizer manufactured in the prior art has a multi-film structure, the thickness of the circular polarizer is usually 100 μm, the thickness of the ultra-thin circular polarizer is also about 70 μm, the thickness is thick, which is not favorable for thinning the display panel, and the circular polarizer has large brittleness and affects the flexibility of the display panel. In the display panel provided by the invention, the color resistor is adopted to replace a circular polarizer to play a role in preventing the reflection of ambient light, the thickness of the color resistor is usually not more than 20 microns, the thickness of the color resistor is far less than that of the circular polarizer, the thickness reduction of the display panel is facilitated, and the circular polarizer with high brittleness is not adopted, so that the flexibility of the display panel is also facilitated to be improved. The touch color film composite layer is arranged, the touch electrode is integrated with the color resistor and the black matrix, and the touch electrode film made of Metal Mesh material is thin in thickness, so that the display panel can be thinned. In addition, the orthographic projection of the black matrix on the plane where the touch electrode is located covers the touch electrode, and the design of the touch electrode in the touch color film composite layer does not influence the aperture opening ratio of the display panel.
Optionally, in the invention, the touch electrode may be located on one side of the black matrix close to the first substrate, that is, the touch electrode is located below the black matrix when viewed from the display surface of the display panel, so that ambient light reflection generated at the routing position of the touch electrode in the display panel can be avoided, and the visual effect of the display panel when displaying is affected.
Fig. 3 is a film structure diagram of an alternative implementation manner of a display panel according to an embodiment of the present invention. As shown in fig. 3, the first flexible substrate 111 includes an array layer 1111, and the array layer 1111 includes a plurality of thin film transistors T as switching devices of pixels in the display panel. The thin film transistor T includes an active layer T1, a source electrode T2, a drain electrode T3, and a gate electrode T4, and is exemplarily illustrated in fig. 3 only as the thin film transistor T having a top gate structure, and it should be noted that the thin film transistor T may also have a bottom gate structure in the present invention. The light emitting unit 1121 of the display layer 112 is an organic light emitting display unit, and includes an anode a, a light emitting layer b and a cathode c, and is exemplified by a top emission light emitting unit structure in fig. 3, in which the anode a is a reflective electrode, is usually made of a metal material, and may be formed of Ag, Mg, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr or a mixture thereof; the light emitting layer b may include a red light emitting layer, a green light emitting layer, a blue light emitting layer, or a white light emitting layer; the cathode c is a transparent electrode and may include Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), zinc oxide (ZnO), or indium oxide (In)2O3) And the like; the anode a can effectively reflect the light emitted by the light emitting layer b to the light emitting side, and the light emitting efficiency is improved. The anode a of the light emitting unit 1121 is electrically connected to the source T2 or the drain T3 of the thin film transistor T, and fig. 3 schematically shows that the anode a is electrically connected to the drain T3 of the thin film transistor T.
With continued reference to fig. 1, the pixel defining layer 1122 is formed from a light absorbing material. The pixel defining layer is made of materials including chromium, chromium oxide, chromium nitride, black organic material, modified organic material or photochromic material. The pixel defining layer may be made of one or more materials, for example, a composite material composed of chromium oxide/chromium nitride/chromium, and the above materials can absorb light to achieve the effects of shading and preventing reflection, so as to prevent light emitted by the light emitting unit from being emitted to an adjacent light emitting unit, thereby causing color mixing.
Optionally, in the display panel provided by the present invention, the color resistors in the touch color film composite layer may include transparent color resistors, and the light emitting units in the display layer include red light emitting units, blue light emitting units, and green light emitting units, where one transparent color resistor is correspondingly disposed above each light emitting unit.
Optionally, in the display panel provided by the present invention, the color resistors in the touch color film composite layer may include a red resistor, a blue resistor, and a green resistor. In one embodiment, the light emitting units in the display layer corresponding to the color resistors one by one can emit white light, and then the white light penetrates through the red resistor, the blue resistor and the green resistor to correspondingly emit red light, blue light and green light; in another embodiment, the light emitting units in the display layer include a red light emitting unit, a blue light emitting unit and a green light emitting unit, the red resistor is located above the red light emitting unit, the blue resistor is located above the blue light emitting unit, and the green resistor is located above the green light emitting unit, that is, the light emitting units and the color resistors of the same color are arranged in a one-to-one correspondence manner.
Fig. 4 is a film structure diagram of another alternative implementation of a display panel according to an embodiment of the present invention. As shown in fig. 4, the light emitting units 1121 include at least a red light emitting unit 1121R, a blue light emitting unit 1121B, and a green light emitting unit 1121G, and the color resistors 1221 include at least a red resistor 1221R, a blue resistor 1221B, and a green resistor 1221G; the red resistor 1221R is located above the red light emitting unit 1121R, the blue resistor 1221B is located above the blue light emitting unit 1121B, and the green resistor 1221G is located above the green light emitting unit 1121G, i.e., the light emitting units and the color resistors of the same color are arranged in a one-to-one correspondence.
The inventors have further found that after replacing the polarizer with a color resist, the thickness of the display panel is reduced, but there may be a risk of color mixing at large viewing angles. As shown in fig. 4, at a large viewing angle (the angle between the viewing angle and the vertical direction in the figure is θ), there may be a situation where the light emitted from the red light emitting unit 1121R exits from above the green light emitting unit 1121G adjacent to the red light emitting unit 1121R, i.e., the red light exits through the green resistor 1221G, resulting in color mixing. Based on this, the inventor further proposes a solution that can reduce the risk of color mixing at large viewing angles by adjusting the thickness of the organic layer between the color resistance and the light emitting unit or by adjusting the width of the black matrix in the display panel.
In one embodiment, to improve the color mixing problem at large viewing angles, the thickness of the film layer between the color resistor and the light emitting unit can be reduced. At least one inorganic layer and one organic layer are arranged between the light-emitting unit and the color resistor, and the thickness of the inorganic layer is d in the direction vertical to the display panelInorganic substanceThe thickness of the organic layer is dOrganic compounds，
Fig. 5 is a schematic diagram of light paths of light emitted from light emitting units in a display panel. As shown in fig. 5, for example, an organic layer C1 and an inorganic layer C2 are included between the color resistor 1221 and the light-emitting unit 1121, light propagating between different media may be refracted, and the light path may be changed. After the light emitting unit 1121 emits light, the light firstly enters the inorganic layer C2, the refraction angle of the light entering the inorganic layer C2 is θ 1, the refraction angle of the light entering the organic layer C1 from the inorganic layer C2 is θ 2, the light enters the color resistor 1221 from the organic layer C1, the color resistor 1221 is also made of organic materials, so that the light entering the color resistor 1221 is not refracted (or the refraction index is small, and is omitted here), and the refraction angle of the light exiting the color resistor 1221 and entering the second flexible substrate 121 is θ 3. When the refraction angle θ 3 is smaller than the critical angle of the second flexible substrate 121, the light may exit through the second flexible substrate 121, and when the refraction angle θ 3 is greater than or equal to the critical angle of the second flexible substrate 121, the light may be totally reflected within the second flexible substrate 121. The inventors consider that the problem of color mixing at large viewing angles can be improved by making the light totally reflected inside the display panel.
The second flexible substrate can be made of organic materials such as polyimide, and after many experiments and extensive data, the inventor obtains that the critical angle of the second flexible substrate is about 36 degrees, the refractive index n1 of the second flexible substrate is 1.7, the refractive index n2 of the organic layer C1 in the display panel is about 1.5, and the refractive index n3 of the inorganic layer C2 in the display panel is about 1.8. With continued reference to fig. 5, from the law of refraction, the following relationship exists between the respective angles of refraction of the organic layer C1, the inorganic layer C2, and the second flexible substrate 121:
The inorganic layer C2 has a thickness d in the direction e perpendicular to the display panelInorganic substanceThe organic layer C1 has a thickness dOrganic compoundsIf the distance between the color resistor 1221 and the light-emitting unit 1121 is d, d is equal to dOrganic compounds+dInorganic substance。
As shown in fig. 5, L represents a shift distance of light, that is, a distance by which an optical path is shifted in a horizontal direction when light emitted from the light emitting unit 1121 is emitted toward a color resistance direction adjacent thereto in a cross-sectional view, wherein L1 and L2 are calculated according to the pythagorean theorem, L1+ L2,
then L ═ dOrganic compounds*tanθ2+dInorganic substance*tanθ1。
In the cross-sectional view, when light is emitted from the rightmost end of the light emitting surface of the light emitting unit 1121, and is refracted by the organic layer and the inorganic layer, the light enters the color resistor 1221 from the right side of the black matrix 1222 in the drawing as a critical condition, and the offset distance L at this time is the minimum offset distance. If the light with the minimum offset distance can be totally reflected in the second flexible substrate, when the offset distance of the light is greater than the minimum offset distance, the light can be totally reflected in the second flexible substrate, and the problem of large-viewing-angle color mixing in the display panel is solved.
FIG. 6 is a view showingThe cross-section of the panel is simplified. As shown in fig. 6, in the display panel, in order to ensure the light extraction efficiency and the aperture ratio of the light emitting device, the width of the black matrix is set as small as possible, and the cross-sectional view of the pixel defining layer between two adjacent light emitting units is substantially a trapezoidal shape in fig. 6. The light emitting surface of the light emitting unit is the outermost surface of the light emitting unit structure (indicated by plane M in the figure), and the width of the pixel defining layer between two adjacent light emitting units on the light emitting surface M is LPDL. In the cross-sectional view, the width of the black matrix between two adjacent color resists is LBMWherein L isPDLAnd LBMThe following relationship is satisfied:
substituting the formula into the calculation formula of the offset distance L to obtain:
also because, L ═ dOrganic compounds*tanθ2+dInorganic substanceTan theta 1, wherein tan theta 2 and tan theta 1 are both constant values, when d isInorganic substanceWhen the size is not changed, dOrganic compoundsWhen the offset distance L becomes smaller, as shown in fig. 5, if the offset distance L becomes smaller based on the minimum offset distance, the light is blocked by the black matrix and cannot be emitted from the color resistor, so that there is no problem of color mixing. Therefore, the design of the invention
Guarantee dOrganic compoundsAnd the color mixing risk under a large visual angle is solved by reducing the color in a certain range, and the thickness of the display panel is reduced.
Further, according to the above formula
The following can be obtained: l isBM＝1.8dOrganic compounds-LPDL+1.34dInorganic substanceIn the display panelAs shown in FIG. 6, the width L of the black matrix is normally setBM<Width L of pixel definition layerPDL. Fig. 7 is a simplified schematic diagram of a display panel according to the present invention. As shown in fig. 7, under the condition that the thickness between the color resistor 1221 and the light emitting unit 1121 is not changed, if the width of the black matrix 1222 is increased, i.e. a part of the black matrix 1222 is extended to the right side in the figure, the light is shielded by the black matrix 1222, so that the light does not penetrate through the adjacent color resistor 1221 to be emitted, and the color mixing problem under a large viewing angle can be improved. The width of a black matrix between two adjacent color resistors is designed to be LBMSatisfies the following condition, 1.8dOrganic compounds-LPDL+1.34dInorganic substance≤LBM≤LPDLThe influence on the aperture opening ratio of the display panel is small while the problem of color mixing under a large viewing angle is guaranteed to be improved.
Fig. 8 is a film structure diagram of another alternative implementation of a display panel according to an embodiment of the present invention. As shown in fig. 8, an optical adhesive 13 is disposed between the encapsulation layer 113 and the touch color film composite layer 122, and the first substrate 11 and the second substrate 12 are fixed by the optical adhesive 12. Optionally, the second substrate 12 further includes a planarization layer 123, and when the second substrate 12 is manufactured, the planarization layer 123 is manufactured on the touch color film composite layer 122 after the touch color film composite layer 122 is manufactured, so as to provide a flat surface, and when the first substrate 11 and the second substrate 12 are attached, the first substrate 11 and the second substrate 12 can be attached tightly, so as to ensure structural stability of the display panel.
The optical paste 13 and the planarization layer 123 are usually made of organic materials, and in order to improve the light mixing problem of the display panel with a large viewing angle, the thicknesses of the layers of the optical paste 13 and the planarization layer 123 are made as thin as possible, for example, in one embodiment, the thickness of the optical paste 13 is about 2 μm, and the thickness of the planarization layer 123 is about 3 μm.
In some alternative embodiments, the encapsulation layers of the display panel include at least one inorganic encapsulation layer and at least one organic encapsulation layer. The inorganic packaging layer is good in compactness and can effectively block water and oxygen, the organic packaging layer is good in flexibility, the inorganic packaging layer is combined with the organic packaging layer, when the display panel is bent, the organic packaging layer can relieve bending stress borne by the inorganic packaging layer, and the inorganic packaging layer is prevented from generating cracks to influence the packaging effect.
In one embodiment, the encapsulation layers include two inorganic encapsulation layers and at least one organic encapsulation layer. Fig. 9 is a film structure diagram of another alternative implementation of a display panel according to an embodiment of the present invention. As shown in fig. 9, the encapsulation layer 113 includes two inorganic encapsulation layers 1131 and at least one organic encapsulation layer 1132. The organic encapsulation layer 1132 is located between two inorganic encapsulation layers 1131. Optionally, in order to improve the problem of light mixing of the display panel with a large viewing angle, the thickness of the inorganic encapsulation layer may be set to about 1 μm on the premise of ensuring the encapsulation effect of the display panel. The thickness of the organic encapsulation layer can be thinned in the case of satisfying the formula in the above embodiment.
Fig. 10 is a film structure diagram of another alternative implementation of a display panel according to an embodiment of the present invention. As shown in fig. 10, in the direction perpendicular to the display panel, the thickness of the blue resistor 1221B is d1, the thickness of the red resistor 1221R is d2, and the thickness of the green resistor 1221G is d3, wherein d1< d2, and d1< d 3. The thickness of the blue resistor is set to be smaller than that of the green resistor and also smaller than that of the red resistor, the transmittance of light penetrating through the blue resistor is increased by reducing the thickness of the blue resistor, and the transmittances of blue light, red light and green light in the display panel are approximately the same.
Taking the thickness of the color resistor as 2.2 μm as an example, the transmittance of light penetrating through the red resistor and the green resistor is about 80% -90%, and the transmittance of light penetrating through the blue resistor is about 70%. In one embodiment, the thickness of the red resistor and the thickness of the green resistor are 2.2 μm, the thickness of the blue resistor is 1 μm, and the transmittance of light penetrating through the blue resistor is about 77%.
Optionally, d1 is not less than 1.0 μm and not more than 2.0 μm, d2 is not less than 1.5 μm and not more than 2.5 μm, and d3 is not less than 1.5 μm and not more than 2.5 μm. The thickness of the blue resistor is smaller than that of the green resistor and also smaller than that of the red resistor, the thickness of the green resistor and that of the red resistor can be the same or different, the arrangement of the color resistor can absorb ambient light and reduce reflectivity, and when the thickness of the blue resistor is reduced and the penetration rate of light penetrating through the blue resistor is increased, the phenomenon that the thickness of the blue resistor is too thin to increase the reflectivity and influence the display effect is avoided. The influence on the transmittance and the reflectivity is considered when setting the thickness of the color resistor in the display panel.
Based on the same inventive concept, the present invention further provides a display device, and fig. 11 is a schematic view of the display device according to the embodiment of the present invention, and as shown in fig. 11, the display device includes the display panel 100 according to any of the embodiments described above. The display device provided by the invention includes but is not limited to the following categories: the mobile terminal comprises a television, a notebook computer, a desktop display, a tablet computer, a digital camera, a mobile phone, an intelligent bracelet, intelligent glasses, a vehicle-mounted display, medical equipment, industrial control equipment, a touch interaction terminal and the like.
Based on the same inventive concept, the present invention further provides a manufacturing method of a display panel, and fig. 12 is a flowchart of the manufacturing method of the display panel according to the embodiment of the present invention. As shown in fig. 12, the manufacturing method includes:
step S101: manufacturing a first flexible substrate on a first supporting plate;
step S102: manufacturing a display layer on a first flexible substrate, wherein the display layer comprises a plurality of light-emitting units and a pixel definition layer, the pixel definition layer is provided with a plurality of first openings, and the light-emitting units are positioned in the first openings;
step S103: manufacturing a packaging layer on the display layer to obtain a first substrate with a first supporting plate;
step S104: manufacturing a second flexible substrate on a second support plate;
step S105: manufacturing a touch color film composite layer on a second flexible substrate to obtain a second substrate with a second supporting plate; wherein, touch-control various membrane composite layer includes: the touch control device comprises a black matrix, a color resistor and a touch control electrode, wherein the black matrix is provided with a plurality of second openings, the second openings comprise the color resistor, the touch control electrode is made of Metal Mesh material, and the orthographic projection of the black matrix on the plane where the touch control electrode is located covers the touch control electrode;
step S106: aligning and attaching a first substrate with a first supporting plate and a second substrate with a second supporting plate;
step S107: and laser stripping the first support plate and the second support plate.
The display panel manufactured by the manufacturing method provided by the invention can refer to any embodiment of the display panel in the invention. When the display panel is manufactured, the first substrate and the second substrate with the supporting plates are manufactured respectively, after the first substrate and the second substrate are aligned and attached, the corresponding supporting plates are peeled off by laser, and the manufacturing process is mature. According to the manufacturing method of the display panel, the color resistor is adopted to replace a circular polarizer to play a role in preventing the reflection of ambient light, the thickness of the color resistor is usually not more than 20 microns, the thickness of the color resistor is far less than that of the circular polarizer, the thickness reduction of the display panel is facilitated, and the circular polarizer with high brittleness is not adopted, so that the flexibility of the display panel is also facilitated to be improved. The touch color film composite layer is manufactured, the touch electrode is integrated with the color resistor and the black matrix, and the touch electrode film made of Metal Mesh material is thin in thickness, so that the display panel can be thinned further. In addition, the orthographic projection of the black matrix on the plane where the touch electrode is located covers the touch electrode, and the design of the touch electrode in the touch color film composite layer does not influence the aperture opening ratio of the display panel.
As can be seen from the above embodiments, the display panel, the manufacturing method thereof and the display device provided by the present invention at least achieve the following beneficial effects:
in the display panel provided by the invention, the color resistor is adopted to replace a circular polarizer to play a role in preventing the reflection of ambient light, the thickness of the color resistor is usually not more than 20 microns, the thickness of the color resistor is far less than that of the circular polarizer, the thickness reduction of the display panel is facilitated, and the circular polarizer with high brittleness is not adopted, so that the flexibility of the display panel is also facilitated to be improved. The touch color film composite layer is arranged, the touch electrode is integrated with the color resistor and the black matrix, and the touch electrode film made of Metal Mesh material is thin in thickness, so that the display panel can be thinned. In addition, the orthographic projection of the black matrix on the plane where the touch electrode is located covers the touch electrode, and the design of the touch electrode in the touch color film composite layer does not influence the aperture opening ratio of the display panel.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (11)
1. A display panel, comprising: the first substrate and the second substrate are oppositely arranged;
the first substrate comprises a first flexible substrate, a display layer and an encapsulation layer which are sequentially arranged, wherein the display layer comprises a plurality of light-emitting units, the display layer further comprises a pixel definition layer, the pixel definition layer is provided with a plurality of first openings, and the light-emitting units are positioned in the first openings;
the second substrate includes: the touch color film composite layer is positioned on one side, close to the packaging layer, of the second flexible substrate; wherein, the touch color film composite layer includes:
the color resistor is arranged in a direction vertical to the display panel and corresponds to the light-emitting unit;
a black matrix having a plurality of second openings exposing the color resistors;
the touch electrode is covered by the orthographic projection of the black matrix on the plane of the touch electrode in the direction vertical to the display panel, and the touch electrode is made of Metalmesh material;
in the luminescenceAt least one inorganic layer and one organic layer are arranged between the unit and the color resistor, and the thickness of the inorganic layer in the direction vertical to the display panel is dInorganic substanceThe thickness of the organic layer in the direction perpendicular to the display panel is dOrganic compounds，LPDLThe width of the pixel definition layer between two adjacent light-emitting units on the light-emitting surface of the light-emitting unit is L, and the width of the black matrix between two adjacent color resistors is LBMWherein, 1.8dOrganic compounds-LPDL+1.34dInorganic substance≤LBM。
2. The display panel according to claim 1,
3. the display panel according to claim 1,
LBM≤LPDL。
4. the display panel according to claim 1,
and an optical adhesive is arranged between the packaging layer and the touch color film composite layer, and the first substrate and the second substrate are fixed through the optical adhesive.
5. The display panel according to claim 1,
the pixel definition layer is made of light absorption materials.
6. The display panel according to claim 1,
the encapsulation layers include at least one inorganic encapsulation layer and at least one organic encapsulation layer.
7. The display panel according to claim 1,
the light-emitting unit at least comprises a red light-emitting unit, a blue light-emitting unit and a green light-emitting unit, and the color resistor at least comprises a red resistor, a blue resistor and a green resistor;
the red resistor is located on the red light-emitting unit, the blue resistor is located on the blue light-emitting unit, and the green resistor is located on the green light-emitting unit.
8. The display panel according to claim 7,
in the direction perpendicular to the display panel, the thickness of the blue color resistor is d1, the thickness of the red color resistor is d2, and the thickness of the green color resistor is d3, wherein d1< d2, and d1< d 3.
9. The display panel according to claim 8,
1.0μm≤d1≤2.0μm，1.5μm≤d2≤2.5μm，1.5μm≤d3≤2.5μm。
10. a display device characterized by comprising the display panel according to any one of claims 1 to 9.
11. A method of manufacturing a display panel according to any one of claims 1 to 9, the method comprising:
manufacturing a first flexible substrate on a first supporting plate;
manufacturing a display layer on the first flexible substrate, wherein the display layer comprises a plurality of light-emitting units and a pixel definition layer, the pixel definition layer is provided with a plurality of first openings, and the light-emitting units are positioned in the first openings;
manufacturing a packaging layer on the display layer to obtain a first substrate with the first supporting plate;
manufacturing a second flexible substrate on a second support plate;
manufacturing a touch color film composite layer on the second flexible substrate to obtain a second substrate with the second support plate; wherein, the touch color film composite layer includes: the touch control device comprises a black matrix, a color resistor and a touch control electrode, wherein the black matrix is provided with a plurality of second openings, the second openings comprise the color resistor, the touch control electrode is made of Metal Mesh material, and the orthographic projection of the black matrix on the plane of the touch control electrode covers the touch control electrode;
aligning and attaching the first substrate with the first supporting plate and the second substrate with the second supporting plate;
and laser stripping the first support plate and the second support plate.
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