CN117529186A - Display panel and display device - Google Patents

Display panel and display device Download PDF

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Publication number
CN117529186A
CN117529186A CN202311722655.5A CN202311722655A CN117529186A CN 117529186 A CN117529186 A CN 117529186A CN 202311722655 A CN202311722655 A CN 202311722655A CN 117529186 A CN117529186 A CN 117529186A
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CN
China
Prior art keywords
layer
light
display panel
emitting unit
substrate
Prior art date
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Pending
Application number
CN202311722655.5A
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Chinese (zh)
Inventor
李远航
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Original Assignee
Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Application filed by Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd filed Critical Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority to CN202311722655.5A priority Critical patent/CN117529186A/en
Publication of CN117529186A publication Critical patent/CN117529186A/en
Pending legal-status Critical Current

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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
    • H10K59/80—Constructional details
    • H10K59/875—Arrangements for extracting light from the devices
    • H10K59/879—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
    • 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
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/122—Pixel-defining structures or layers, e.g. banks
    • 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]
    • 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
    • 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
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/873—Encapsulations
    • H10K59/8731—Encapsulations multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
    • 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
    • H10K59/80—Constructional details
    • H10K59/875—Arrangements for extracting light from the devices
    • H10K59/878—Arrangements for extracting light from the devices comprising reflective means
    • 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
    • H10K59/80—Constructional details
    • H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • H10K59/8792—Arrangements for improving contrast, e.g. preventing reflection of ambient light comprising light absorbing layers, e.g. black layers

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Electroluminescent Light Sources (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

The invention relates to a display panel and a display device. According to the invention, the MLP structure and the PLP structure are mutually fused, so that the planarization operation is performed without adopting coating or printing high refractive index organic high-transmittance materials through an ink-jet printing process, the thickness of a film layer above the packaging layer is reduced, the transmittance of the film layer above the packaging layer is improved, and the bending reliability of the display panel is improved. The light emitted by the light-emitting unit is totally reflected on the optical adjusting layer on the groove wall, so that the light absorbed by the black matrix layer in the prior art is totally reflected to the middle for emission, the light utilization rate of the light-emitting unit is improved, and the brightness of the display panel is improved. According to the invention, the refractive indexes of the first inorganic package, the organic package layer, the second inorganic package layer, the first touch insulating layer, the second touch insulating layer and the light filtering unit are sequentially increased, so that the light with a large viewing angle of the light emitting unit is emitted to the center through refraction, and the light emitting efficiency of a positive viewing angle is improved.

Description

Display panel and display device
Technical Field
The application relates to the technical field of display, in particular to a display panel and a display device.
Background
Organic Light-Emitting Diode (OLED) display devices have the advantages of Light weight, wide viewing angle, fast response time, low temperature resistance, high luminous efficiency and the like compared with traditional liquid crystal display panels (Liquid Crystal Display, LCD), so that the Organic Light-Emitting Diode (OLED) display devices are always considered as a new display technology of the next generation in the display industry, and particularly, OLEDs can be made into flexible display panels capable of being bent on flexible substrates, which is a great advantage of OLED display panels. With the advent of the 5G age, power consumption of the panel became one of the largest parameters perceived by consumers. In order to reduce the power consumption of the OLED panel and improve the efficiency of the OLED screen body, panel manufacturers continuously push new technologies. At present, the OLED mobile phone product is developed in a mode of large size, high refresh rate and high brightness, but under the condition that the battery technology has no crossing breakthrough, the market has higher requirements on the power consumption of the OLED product. Among them, the Polarizer (POL) can effectively reduce the reflectivity of the panel under strong light, but loses nearly 58% of light. This greatly increases the lifetime burden of the OLED; on the other hand, the polaroid has larger thickness and crisp material, and is not beneficial to the development of dynamic bending products.
POL-less (PLP) technology using Color filters (Color filters) instead of Polarizers (POLs) is currently emerging. It can not only reduce the thickness of the functional layer from 100 μm to below 5 μm; and the light extraction rate can be improved from 42% to 60%, so the POL-less technology based on the color filter is considered as one of key technologies for realizing dynamic bending product development.
Wherein, by means of geometrical optics, a microarray (Micro lens Pattern, MLP) is arranged in the OLED screen body, so that more divergent light emitted by the OLED screen body is converged right above the screen body, and the method is one of effective means for improving the efficiency of the OLED screen body. The microarray pattern in the prior art MLP is usually formed by forming an opening corresponding to the pixel of the lower side above the thin film encapsulation layer, designing the angle and size of the opening according to the required optical properties, and then filling the opening with a high refractive index organic high transmittance material by coating or by an Ink Jet Printing process (IJP for short), and planarizing the same to form the MLP structure. The current PLP & MLP integrated structure is to directly manufacture a Direct on-cell touch (DOT) layer on a packaging layer, then manufacture a PLP film layer, then form an opening at a position of a flat layer corresponding to a pixel region, and then coat or print a high refractive index organic high transmittance material through IJP. Although the technology realizes the integration of the two technologies, the film layer flattened by adopting the high refractive index organic high-transmittance material is thicker, and the bending reliability of the flexible bending product can be greatly reduced.
Disclosure of Invention
The invention aims to provide a display panel and a display device, which can solve the problems that in the prior art, a film layer is thicker, and bending reliability of a flexible bending product is greatly reduced.
In order to solve the above-described problems, the present invention provides a display panel including: a substrate; a plurality of light emitting units arranged on the substrate at intervals; the packaging layer is arranged on one side of the light-emitting unit, which is far away from the substrate; the touch control layer is arranged on one side of the packaging layer far away from the substrate; the black matrix layer is arranged on one side of the touch control layer far away from the substrate; the display panel is provided with a plurality of grooves penetrating through the black matrix layer, and the grooves are in one-to-one correspondence with the light emitting units; an optical adjustment layer arranged on the surface of one side of the black matrix layer far away from the substrate and on the wall of the groove; the plurality of light filtering units are arranged in the grooves in a one-to-one correspondence manner; the flat layer is arranged on the light filtering unit and the surface of one side, far away from the substrate, of the optical adjustment layer; wherein, partial light rays emitted by the light emitting unit are totally reflected on the optical adjusting layer on the groove wall.
Further, the optical adjustment layer is made of an organic material.
Furthermore, the optical adjusting layer is made of inorganic materials and is also arranged at the bottom of the groove.
Further, the packaging layer comprises a first inorganic packaging layer, an organic packaging layer and a second inorganic packaging layer which are sequentially stacked on the light-emitting unit and the substrate; the touch layer includes: the first touch insulating layer and the second touch insulating layer are sequentially stacked on the packaging layer; the refractive indexes of the first inorganic packaging layer, the organic packaging layer, the second inorganic packaging layer, the first touch insulating layer, the second touch insulating layer and the light filtering unit are sequentially increased.
Further, the refractive indexes of the first inorganic packaging layer, the organic packaging layer, the second inorganic packaging layer, the first touch insulating layer, the second touch insulating layer and the light filtering unit are all in the range of 1.2-1.9.
Further, the light emitting unit includes: a first light emitting unit, a second light emitting unit, and a third light emitting unit; the light filtering unit comprises a first light filtering unit, a second light filtering unit and a third light filtering unit which correspond to the first light emitting unit, the second light emitting unit and the third light emitting unit respectively; the optical adjustment layer comprises a first optical adjustment unit, a second optical adjustment unit and a third optical adjustment unit which respectively correspond to the first light emitting unit, the second light emitting unit and the third light emitting unit; the first optical adjusting unit, the second optical adjusting unit and the third optical adjusting unit are made of the same materials.
Further, the material of the flat layer is an organic material, and the transmittance of the flat layer is more than 80%.
Further, the display panel further includes: a pixel defining layer disposed on the substrate and having a plurality of pixel openings; the light emitting unit is arranged in the pixel opening; the width of one side of the light filtering unit, which is close to the substrate, is larger than the width of one side of the pixel opening, which is far away from the substrate.
Further, the width of the side of the filter unit close to the substrate is 1 μm-10 μm larger than the width of the side of the pixel opening away from the substrate.
Further, the display panel comprises a display area and a non-display area surrounding the display area, and the display panel further comprises alignment marks arranged at corners of the non-display area; the alignment marks comprise a plurality of first sub-alignment marks, and a first gap is reserved between any two adjacent first sub-alignment marks; the optical adjustment layer and the alignment mark are provided with a second gap, and the orthographic projection of the optical adjustment layer on the substrate is not overlapped with the orthographic projection of the first gap on the substrate.
Further, the display panel further includes: a thin film transistor layer disposed between the substrate and the light emitting unit; the first sub alignment mark is made of the same material as the black matrix layer, or made of the same material as one of the active layer, the grid electrode, the source electrode and the drain electrode of the thin film transistor layer.
Further, the alignment marks further include a plurality of second sub-alignment marks disposed on the first sub-alignment marks in a one-to-one correspondence manner, and the second sub-alignment marks are the same as the optical adjustment layer.
In order to solve the problems, the invention provides a display device which comprises the display panel.
The invention has the advantages that: the black matrix layer of the display panel is arranged on one side of the touch layer away from the substrate, the optical adjustment layer is arranged on the surface of one side of the black matrix layer away from the substrate and the groove wall of the groove, the plurality of light filtering units are arranged in the groove and correspond to the light emitting units one by one, the flat layer is arranged on the light filtering units and the optical adjustment layer, the MLP structure and the PLP structure are fused with each other, and further, the planarization operation is carried out without adopting coating or printing high-refractive-index organic high-transmittance materials through an ink-jet printing process, thereby, the thickness of the film layer above the packaging layer can be reduced, the transmittance of the film layer above the packaging layer is improved, and the bending reliability of the display panel is facilitated to be improved.
The light emitted by the light-emitting unit is totally reflected on the optical adjusting layer on the groove wall, so that the light absorbed by the black matrix layer in the prior art can be totally reflected to the middle through the optical adjusting layer for emission, thereby improving the light utilization rate of the light-emitting unit and the brightness of the display panel.
According to the invention, the refractive indexes of the first inorganic package, the organic package layer, the second inorganic package layer, the first touch insulating layer, the second touch insulating layer and the light filtering unit are sequentially increased, so that large-view-angle light rays of the light emitting unit can be emitted to the center through refraction, and the light emitting efficiency of a positive view angle is improved.
In the invention, the second gap is arranged between the optical adjusting layer and the alignment mark, and the orthographic projection of the optical adjusting layer on the substrate and the orthographic projection of the first gap on the substrate are not overlapped, so that the optical adjusting layer is prevented from covering the alignment mark, the influence on the optical recognition and grabbing of the alignment mark by an exposure machine and an MOD (mode) section CCD (charge coupled device) lens is avoided, the phenomenon of deviation grabbing or incapability of processing is avoided, and the production yield is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a display panel according to embodiment 1 of the present invention;
FIG. 2 is a schematic light ray diagram of a display panel according to an embodiment 1 of the present invention;
FIG. 3 is a bar chart showing improvement of optical efficiency of the light emitting unit of the display panel according to the embodiment 1 of the present invention compared with the light emitting unit of the display panel using the polarizer in the prior art;
FIG. 4 is a bar graph showing the luminance decay of the light emitting unit of the display panel of example 1 of the present invention compared with the luminance decay of the light emitting unit of the display panel using the polarizer in the prior art;
fig. 5 is a schematic plan view of a display panel according to embodiment 1 of the present invention;
FIG. 6 is a schematic diagram of the alignment mark according to embodiment 1 of the present invention;
fig. 7 is a schematic structural diagram of a display panel according to embodiment 2 of the present invention;
fig. 8 is a schematic structural view of a display panel according to embodiment 3 of the present invention;
FIG. 9 is a schematic diagram of the alignment mark according to embodiment 4 of the present invention;
fig. 10 is a schematic structural diagram of an alignment mark according to embodiment 5 of the present invention.
Reference numerals illustrate:
100. a display panel;
1. a substrate; 2. A light emitting unit;
3. an encapsulation layer; 4. A touch layer;
5. a black matrix layer; 6. An optical adjustment layer;
7. a light filtering unit; 8. A flat layer;
9. a thin film transistor layer; 10. A pixel definition layer;
11. an alignment mark; 12. A first gap;
13. a second gap;
111. a first sub-alignment mark; 112. A second sub-alignment mark;
21. a first light emitting unit; 22. A second light emitting unit;
23. a third light emitting unit; 31. A first inorganic encapsulation layer;
32. an organic encapsulation layer; 33. A second inorganic encapsulation layer;
41. a first touch electrode layer; 42. A first touch insulating layer;
43. a second touch electrode layer; 44. A second touch insulating layer;
411. a first touch electrode; 431. A second touch electrode;
51. a groove; 511. A groove wall;
71. a first filter unit; 72. A second filter unit;
73. and a third filter unit.
Detailed Description
The following detailed description of the preferred embodiments of the invention, taken in conjunction with the accompanying drawings, is provided to fully convey the substance of the invention to those skilled in the art, and to illustrate the invention to practice it, so that the technical disclosure of the invention will be made more clear to those skilled in the art to understand how to practice the invention more easily. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as limited to the set forth herein.
The directional terms used herein, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", etc., are used for explaining and describing the present invention only in terms of the directions of the drawings and are not intended to limit the scope of the present invention.
In the drawings, like structural elements are referred to by like reference numerals and components having similar structure or function are referred to by like reference numerals. In addition, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of understanding and description, and the present invention is not limited to the size and thickness of each component.
The present application provides a display device including a display panel 100. In this embodiment, the display device is an organic light emitting semiconductor display device.
Example 1
As shown in fig. 1, the present embodiment provides a display panel 100. The display panel 100 includes: a substrate 1, a plurality of light emitting units 2, an encapsulation layer 3, a touch layer 4, a black matrix layer 5, an optical adjustment layer 6, a plurality of light filtering units 7, a planarization layer 8, a thin film transistor layer 9, and a pixel definition layer 10.
The material of the substrate 1 includes glass, polyimide, polycarbonate, polyethylene terephthalate, polyethylene naphthalate, and the like. In this embodiment, the substrate 1 is made of polyimide, so that the bending performance of the display panel 100 can be improved.
Wherein the thin film transistor layer 9 is disposed on the substrate 1. Wherein the thin film transistor layer includes a plurality of thin film transistor devices (not shown), each thin film transistor device further comprising: the structures of the gate (not shown), the source (not shown), the drain (not shown), and the active layer (not shown) are not described in detail herein.
Wherein the pixel defining layer 10 is arranged at a side of the thin film transistor layer 9 remote from the substrate 1. Wherein the pixel defining layer 10 is provided with a plurality of pixel openings spaced apart from each other. Wherein the width of the side of the pixel opening away from the substrate is L 1 。
Wherein a plurality of light emitting units 2 are disposed in the pixel opening at intervals. The light emitting unit 2 includes: the structures of the anode (not shown), the luminescent material layer (not shown), and the cathode (not shown) are not described in detail herein.
Wherein the light emitting unit 2 includes: the first light emitting unit 21, the second light emitting unit 22, and the third light emitting unit 23. In the present embodiment, the first light emitting unit 21, the second light emitting unit 22, and the third light emitting unit 23 are a red light emitting unit, a green light emitting unit, and a blue light emitting unit, respectively.
Wherein the encapsulation layer 3 is disposed on a side of the light emitting unit 2 away from the substrate 1. Specifically, the encapsulation layer 3 also covers the side of the pixel defining layer 10 away from the substrate 1. Wherein the encapsulation layer 3 comprises: comprising a first inorganic encapsulation layer 31, an organic encapsulation layer 32 and a second inorganic encapsulation layer 33, which are stacked in this order.
The first inorganic encapsulation layer 31 and the second inorganic encapsulation layer 33 are mainly used for preventing water and oxygen from invading the light emitting unit 2 and the thin film transistor layer 9, so as to prolong the service life of the display panel 100.
The organic encapsulation layer 32 is mainly used for relieving stress applied to the encapsulation layer 3 and improving bending performance of the display panel 100.
The touch layer 4 is disposed on a side of the encapsulation layer 3 away from the substrate 1. The touch layer 4 includes: a first touch electrode layer 41, a first touch insulating layer 42, a second touch electrode layer 43, and a second touch insulating layer 44.
The first touch electrode layer 41 includes a plurality of first touch electrodes 411 spaced apart from each other, and the first touch electrodes 411 are disposed corresponding to the pixel defining layer 10. In other words, the first touch electrode 411 does not cover the light emitting unit 2, preventing light emission of the light emitting unit 2 from being blocked.
The first touch insulating layer 42 is disposed on a surface of the side of the first touch electrode 411 away from the substrate 1, and further covers the encapsulation layer 3 between two adjacent first touch electrodes 411. The first touch insulating layer 42 is mainly used for preventing a short circuit phenomenon from occurring in contact between the first touch electrode layer 41 and the second touch electrode layer 43.
The second touch electrode layer 43 is disposed on a side of the first touch insulating layer 42 away from the substrate 1. The second touch electrode layer 43 includes a plurality of second touch electrodes 431 spaced apart from each other, and the second touch electrodes 431 are disposed corresponding to the pixel defining layer 10. In other words, the second touch electrode 431 does not cover the light emitting unit 2, preventing light emission of the light emitting unit 2 from being blocked.
The second touch insulating layer 44 is disposed on a surface of the side of the second touch electrode 431 away from the substrate 1, and further covers the first touch electrode layer 41 between two adjacent second touch electrodes 431. The second touch insulating layer 44 is mainly used for protecting the second touch electrode layer 43.
Wherein the black matrix layer 5 is disposed on a side of the touch layer 4 away from the substrate 1. The display panel 100 has a plurality of grooves 51 penetrating the black matrix layer 5, the grooves 51 being in one-to-one correspondence with the light emitting units 2. The black matrix layer 5 is mainly used for preventing crosstalk between different colors of light emitted by adjacent light emitting units 2.
Wherein the optical adjustment layer 6 is disposed on the surface of the black matrix layer 5 on the side away from the substrate 1 and on the groove wall 511 of the groove 51. In this embodiment, the material of the optical adjustment layer is an organic material. Since the transmittance of the organic material is relatively low, the optical adjustment layer 6 in this embodiment does not cover the bottom of the groove.
As shown in fig. 2, a part of light a emitted by the light emitting unit 2 is totally reflected on the optical adjustment layer 6 on the groove wall 511 to form B, so that light absorbed by the black matrix layer 5 in the prior art can be totally reflected by the optical adjustment layer 6 and emitted to the middle, thereby improving the light utilization rate of the light emitting unit 2 and the brightness of the display panel 100.
In this embodiment, the optical adjustment layer 6 includes a first optical adjustment unit, a second optical adjustment unit, and a third optical adjustment unit corresponding to the first light emitting unit 21, the second light emitting unit 22, and the third light emitting unit 23, respectively. In this embodiment, the first optical adjustment unit, the second optical adjustment unit, and the third optical adjustment unit are made of the same material.
Wherein, the plurality of filter units 7 are arranged in the grooves 51 in a one-to-one correspondence. In this embodiment, the filter unit 7 includes a first filter unit 71, a second filter unit 72, and a third filter unit 73 corresponding to the first light emitting unit 21, the second light emitting unit 22, and the third light emitting unit 23, respectively. Specifically, in the present embodiment, the first filter unit 71, the second filter unit 72, and the third filter unit 73 are a red filter unit, a green filter unit, and a blue filter unit, respectively.
Wherein the width of the side of the filter unit 7 near the substrate 1 is L 2 。L 2 Ratio L 1 By 1 μm to 10 μm, more light can be emitted through the filter unit 7, the light emitting viewing angle of the light emitting unit 2 is increased, and the brightness of the display panel 100 is improved.
As shown in fig. 2, the refractive indexes of the first inorganic encapsulation layer 31, the organic encapsulation layer 32, the second inorganic encapsulation layer 33, the first touch insulation layer 42, the second touch insulation layer 44, and the optical filter unit 7 sequentially increase, and the refractive indexes of the first inorganic encapsulation layer 31, the organic encapsulation layer 32, the second inorganic encapsulation layer 33, the first touch insulation layer 42, the second touch insulation layer 44, and the optical filter unit 7 are all in the range of 1.2-1.9, so that the large-viewing-angle light C of the light emitting unit 2 can be emitted to the center through the refractive layer D, thereby improving the light extraction efficiency of the positive viewing angle.
Wherein a flat layer 8 is disposed on the filter unit 7 and on a surface of the optical adjustment layer 6 on a side away from the substrate 1. The material of the flat layer 8 is an organic material, and the transmittance of the flat layer 8 is greater than 80%, so as to be beneficial to improving the brightness of the display panel 100. The planarization layer 8 is mainly used to provide a planar surface for the upper film layer. In this embodiment, the MLP structure and the PLP structure are fused with each other, so that the planarization operation is performed without using coating or Printing a high refractive index organic high transmittance material through an Ink Jet Printing process (IJP), thereby reducing the thickness of the film layer above the encapsulation layer 3, improving the transmittance of the film layer above the encapsulation layer 3, and being beneficial to improving the bending reliability of the display panel 100.
As shown in fig. 3, compared with the display panel adopting the polarizer in the prior art, the display panel of the present application in which the MLP structure and the PLP structure are mutually fused has the optical efficiency of the red light emitting unit R increased 36.84%, the optical efficiency of the green light emitting unit G increased 28.06%, and the optical efficiency of the blue light emitting unit B increased 29.43%, so that the optical efficiency of the light emitting unit 2 can be effectively increased.
As shown in fig. 4, in the display panel using a polarizer in the related art, the luminance decay percentage of the red light emitting unit R is 90.23%, the luminance decay percentage of the green light emitting unit G is 83.55%, and the luminance decay percentage of the blue light emitting unit B is 61.37%. In the display panel of the present application, in which the MLP structure and the PLP structure are fused with each other, the luminance decay percentage of the red light emitting unit R is 69.55%, the luminance decay percentage of the green light emitting unit G is 64.49%, and the luminance decay percentage of the blue light emitting unit B is 51.88%. Therefore, the MLP structure and the PLP structure are mutually fused, so that the brightness attenuation proportion of the light-emitting unit 2 can be effectively reduced. As shown in fig. 5, the display panel 100 includes a display area 101 and a non-display area 102 surrounding the display area 101.
The display panel 100 further includes alignment marks 11 disposed at corners of the non-display area 102. In this embodiment, the alignment marks 11 are disposed at four corners of the non-display area 102, which are respectively an upper left corner, a lower left corner, an upper right corner, and a lower right corner. Further, the alignment marks 11 are disposed in the clearance area at the corners.
As shown in fig. 6, the alignment marks 11 include a plurality of first sub-alignment marks 111. A first gap 12 is formed between any two adjacent first sub-alignment marks 111. In this embodiment, the first sub-alignment mark 111 is made of the same material as the black matrix layer 5. Therefore, the first sub alignment mark 111 can be formed simultaneously when the black matrix layer 5 is prepared, so that a photomask is saved, and the production cost is reduced.
As shown in fig. 6, a second gap 13 is formed between the optical adjustment layer 6 and the alignment mark 11, and the front projection of the optical adjustment layer 6 on the substrate 1 and the front projection of the first gap 12 on the substrate 1 do not overlap. Therefore, the optical adjustment layer 6 is prevented from covering the alignment mark 11, the influence on the exposure machine and the optical recognition grabbing of the alignment mark 11 by the MOD section CCD lens is avoided, the phenomenon that grabbing deviation or a process cannot be performed is avoided, and the production yield is improved.
Example 2
As shown in fig. 7, this embodiment includes most of the technical features of embodiment 1, and the difference between this embodiment and embodiment 1 is that in this embodiment, the material of the optical adjustment layer 6 is an inorganic material. Since the transmittance of the inorganic material is relatively high, the optical adjustment layer 6 in the present embodiment is also provided at the bottom of the groove 51.
Example 3
As shown in fig. 8, this embodiment includes most of the technical features of embodiment 1 and embodiment 2, and is different from embodiment 1 and embodiment 2 in that in this embodiment, the optical adjustment layer 6 includes a first optical adjustment unit 61, a second optical adjustment unit 62, and a third optical adjustment unit 63 corresponding to the first light emitting unit 21, the second light emitting unit 22, and the third light emitting unit 23, respectively. In this embodiment, the materials of the first optical adjustment unit 61, the second optical adjustment unit 62 and the third optical adjustment unit 63 are different. It should be noted that the materials of the first optical adjusting unit 61, the second optical adjusting unit 62, and the third optical adjusting unit 63 are not limited as long as it can ensure that the partial light emitted by the first light emitting unit 21, the second light emitting unit 22, and the third light emitting unit 23 is totally reflected by the corresponding first optical adjusting unit 61, second optical adjusting unit 62, and third optical adjusting unit 63 on the groove wall 511.
In the present embodiment, the first optical adjustment units 61 are disposed on the groove walls on two sides of the groove 51 corresponding to the first light emitting unit 21, and extend to cover the black matrix layer 5 on two sides of the groove 51; the second optical adjustment units 62 are disposed on the groove walls on two sides of the groove 51 corresponding to the second light emitting unit 22, and extend to cover the black matrix layer 5 on two sides of the groove 51; the third optical adjustment units 63 are disposed on the groove walls on both sides of the groove 51 corresponding to the third light emitting unit 23, and extend to cover the black matrix layer 5 on both sides of the groove 51. Wherein the first optical adjustment unit 61 intersects with the second optical adjustment unit 62, and the boundary line between the first optical adjustment unit 61 and the second optical adjustment unit 62 coincides with the central axis of the black matrix layer 5 between the first filter unit 71 and the second filter unit 72. Wherein the second optical adjustment unit 62 intersects with the third optical adjustment unit 63, and the boundary line between the second optical adjustment unit 62 and the third optical adjustment unit 63 coincides with the central axis of the black matrix layer 5 between the second filter unit 72 and the third filter unit 73. Wherein the third optical adjustment unit 63 intersects the first optical adjustment unit 61, and the boundary line between the third optical adjustment unit 63 and the first optical adjustment unit 61 coincides with the central axis of the black matrix layer 5 between the third filter unit 73 and the first filter unit 71.
Example 4
As shown in fig. 9, this embodiment includes most of the technical features of embodiment 1, embodiment 2 and embodiment 3, and the difference between this embodiment and embodiment 1, embodiment 2 and embodiment 3 is that in this embodiment, the alignment mark 11 further includes a plurality of second sub-alignment marks 112 disposed on the first sub-alignment mark 111 in a one-to-one correspondence manner, and the second sub-alignment marks 112 are made of the same material as the optical adjustment layer 6. Therefore, the thickness of the alignment mark 11 can be increased, the recognition accuracy of the exposure machine CCD can be improved by improving the step difference, and the second sub-alignment mark 112 can be formed simultaneously when the optical adjustment layer 6 is prepared, so that a photomask is saved, and the production cost is reduced.
Example 5
As shown in fig. 10, this embodiment includes most of the technical features of embodiment 1, embodiment 2, embodiment 3 and embodiment 4, and the difference between this embodiment and embodiment 1, embodiment 2, embodiment 3 and embodiment 4 is that in this embodiment, the first sub-alignment mark 111 is the same as one of the active layer, the gate electrode, the source electrode and the drain electrode of the thin film transistor layer 9. In this embodiment, the first sub-alignment mark 111 is made of the same material as the gate, so that the first sub-alignment mark 111 can be formed simultaneously during the gate preparation, thereby saving the mask and reducing the production cost.
The foregoing has described in detail a display panel and a display device provided by the present application, and specific examples have been applied herein to illustrate the principles and embodiments of the present application, where the above examples are only for aiding in understanding the method and core idea of the present application; meanwhile, those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, and the present description should not be construed as limiting the present application in view of the above.

Claims (13)

1. A display panel, comprising:
a substrate (1);
a plurality of light emitting units (2) arranged on the substrate (1) at intervals;
the packaging layer (3) is arranged on one side of the light-emitting unit (2) away from the substrate (1);
the touch control layer (4) is arranged on one side of the packaging layer (3) far away from the substrate (1);
the black matrix layer (5) is arranged on one side of the touch control layer (4) far away from the substrate (1);
the display panel is provided with a plurality of grooves (51) penetrating through the black matrix layer (5), and the grooves (51) are in one-to-one correspondence with the light emitting units (2);
an optical adjustment layer (6) provided on the surface of the black matrix layer (5) on the side away from the substrate (1) and on the groove wall (511) of the groove (51);
the plurality of light filtering units (7) are arranged in the grooves (51) in a one-to-one correspondence manner; and
a flat layer (8) provided on the filter unit (7) and on a surface of the optical adjustment layer (6) on a side away from the substrate (1);
wherein, partial light rays emitted by the light emitting unit (2) are totally reflected on the optical adjusting layer (6) on the groove wall (511).
2. A display panel according to claim 1, characterized in that the material of the optical adjustment layer (6) is an organic material.
3. The display panel according to claim 1, wherein the material of the optical adjustment layer (6) is an inorganic material, and the optical adjustment layer (6) is further disposed at the bottom of the groove (51).
4. The display panel according to claim 1, wherein the encapsulation layer (3) comprises a first inorganic encapsulation layer (31), an organic encapsulation layer (32) and a second inorganic encapsulation layer (33) which are sequentially stacked on the light emitting unit (2) and the substrate (1);
the touch layer (4) comprises: a first touch insulating layer (42) and a second touch insulating layer (44) which are sequentially stacked on the packaging layer (3);
the refractive indexes of the first inorganic packaging layer (31), the organic packaging layer (32), the second inorganic packaging layer (33), the first touch insulating layer (42), the second touch insulating layer (44) and the light filtering unit (7) are sequentially increased.
5. The display panel according to claim 4, wherein the refractive index of the first inorganic encapsulation layer (31), the organic encapsulation layer (32), the second inorganic encapsulation layer (33), the first touch insulation layer (42), the second touch insulation layer (44) and the filter unit (7) are all in the range of 1.2-1.9.
6. A display panel according to claim 1, characterized in that the light emitting unit (2) comprises: a first light-emitting unit (21), a second light-emitting unit (22), and a third light-emitting unit (23);
the filter unit (7) comprises a first filter unit (71), a second filter unit (72) and a third filter unit (73) which respectively correspond to the first light-emitting unit (21), the second light-emitting unit (22) and the third light-emitting unit (23);
the optical adjustment layer (6) comprises a first optical adjustment unit, a second optical adjustment unit and a third optical adjustment unit corresponding to the first light emitting unit (21), the second light emitting unit (22) and the third light emitting unit (23), respectively;
the first optical adjusting unit, the second optical adjusting unit and the third optical adjusting unit are made of the same materials.
7. The display panel according to claim 1, wherein the material of the flat layer (8) is an organic material, and the transmittance of the flat layer (8) is greater than 80%.
8. The display panel of claim 1, further comprising:
a pixel defining layer (10) provided on the substrate (1) and having a plurality of pixel openings;
the light emitting unit (2) is arranged in the pixel opening;
wherein the width of the side of the filter unit (7) close to the substrate (1) is larger than the width of the side of the pixel opening far away from the substrate (1).
9. A display panel according to claim 8, characterized in that the width of the side of the filter unit (7) close to the substrate (1) is 1 μm-10 μm larger than the width of the side of the pixel opening remote from the substrate (1).
10. The display panel according to claim 1, characterized in that the display panel comprises a display area (101) and a non-display area (102) (101) surrounding the display area (101), the display panel further comprising alignment marks (11) arranged at corners of the non-display area (102) (101);
the alignment marks (11) comprise a plurality of first sub-alignment marks (111), and a first gap (12) is formed between any two adjacent first sub-alignment marks (111);
the second gap (13) is arranged between the optical adjustment layer (6) and the alignment mark (11), and the orthographic projection of the optical adjustment layer (6) on the substrate (1) and the orthographic projection of the first gap (12) on the substrate (1) are not overlapped.
11. The display panel of claim 10, further comprising: a thin film transistor layer (9) provided between the substrate (1) and the light-emitting unit (2);
the first sub alignment mark (111) is made of the same material as the black matrix layer (5), or the first sub alignment mark (111) is made of the same material as one of the active layer, the grid electrode, the source electrode and the drain electrode of the thin film transistor layer (9).
12. The display panel according to claim 11, wherein the alignment marks (11) further comprise a plurality of second sub-alignment marks (112) disposed on the first sub-alignment marks (111) in a one-to-one correspondence manner, and the second sub-alignment marks (112) are made of the same material as the optical adjustment layer (6).
13. A display device comprising the display panel of any one of claims 1-12.
CN202311722655.5A 2023-12-13 2023-12-13 Display panel and display device Pending CN117529186A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311722655.5A CN117529186A (en) 2023-12-13 2023-12-13 Display panel and display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311722655.5A CN117529186A (en) 2023-12-13 2023-12-13 Display panel and display device

Publications (1)

Publication Number Publication Date
CN117529186A true CN117529186A (en) 2024-02-06

Family

ID=89753191

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311722655.5A Pending CN117529186A (en) 2023-12-13 2023-12-13 Display panel and display device

Country Status (1)

Country Link
CN (1) CN117529186A (en)

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