Color filtering cover plate and display terminal equipment

Abstract

The utility model discloses a color filter cover plate and display terminal equipment, relates to flexible display technical field, the color filter cover plate includes ultra-thin glass, protection layer and color filter layer that are laminated in proper order, the color filter layer includes red pixel unit, green pixel unit, blue pixel unit and black matrix. The display terminal equipment comprises an OLED panel and the color filtering cover plate. The OLED panel comprises an OLED substrate, an anode layer, a light-emitting layer, a cathode layer and a packaging layer which are stacked in sequence, and the light-emitting layer is a white light-emitting material layer. According to the utility model, the color cast is avoided, the difficulty and the cost of the manufacturing process are reduced, in addition, the color filter layer is arranged on the surface of the protective cover plate, a farther distance and more layers exist between the color filter layer and the metal electrode, the low-reflectivity display effect can be achieved under the condition of no refraction layer, and the device is thinner and more suitable for bending.

Description

Technical Field

[0001] The utility model relates to the technical field of flexible display, in particular to a color filter cover plate and a display terminal device. Background Art

[0002] At present, most OLED display panels use RGB three-color OLED materials as the light-emitting layer, and the surface is attached with polarizers to reduce the metal electrode and reduce the reflection of ambient light by the metal cathode. However, due to the strong rigidity of the polarizer, the bending ability of the display panel will be reduced in the current situation of vigorously developing flexible displays. At the same time, due to the low transmittance of the polarizer, the OLED driving circuit needs to provide a larger voltage during display, which not only increases the power consumption but also accelerates the oxidation of the OLED display material and reduces the life of the display panel. Due to the large difference in the oxidation rate of the RGB three-color OLED materials, the green OLED has the strongest antioxidant ability, while the blue OLED material has the weakest antioxidant ability due to the aromatic ring structure of the molecule. This causes the OLED display panel to produce color deviation due to inconsistent oxidation degree after long-term use. The three-color OLED display panel needs to be masked three times for evaporation of the three-color OLED separately. The process is complex and requires extremely high precision.

[0003] The prior art discloses a patent application for an OLED display panel and an OLED display device, with the first publication number CN111816681A, which includes an array substrate, an OLED device layer, a thin film encapsulation layer, and a color filter. The technical solution is to make a color filter layer on the OLED panel, using three RGB color sub-pixels. The color filter layer is only used to correct the color deviation problem of the OLED, but the brightness will be reduced after the color deviation caused by oxidation passes through the color filter layer, resulting in the synthesized color still having color deviation.

[0004] The prior art discloses a patent for a low-reflectivity OLED display panel, with the publication number CN219146071U. The panel includes: a substrate; an anode layer, arranged on the upper surface of the substrate; a light-emitting pixel layer, arranged on the upper surface of the anode layer; an encapsulation layer, arranged on the upper surface of the light-emitting pixel layer; a refraction layer, arranged on the upper surface of the encapsulation layer; and a color filter layer, arranged on the upper surface of the refraction layer. The color filter layer (color filter layer) of this technical solution is arranged on the surface of the OLED display panel, and the refraction layer must be a laminated oxide, resulting in a large overall thickness and not suitable for bending. Utility Model Content

[0005] The utility model provides a color filter cover plate and a display terminal device, which can solve the above problems.

[0006] In order to solve the above problems, the technical solution adopted by the utility model is as follows:

[0007] In a first aspect, the utility model provides a flexible color filter cover, comprising an ultra-thin glass, a protective layer and a color filter layer stacked in sequence, wherein the color filter layer comprises a red pixel unit, a green pixel unit, a blue pixel unit and a black matrix.

[0008] In a preferred embodiment of the present invention, the red pixel unit includes uniformly mixed red pigment and UV type resin, the green pixel unit includes uniformly mixed green pigment and UV type resin, and the blue pixel unit includes uniformly mixed blue pigment and UV type resin.

[0009] In a preferred embodiment of the present invention, the UV type resin is (meth)acrylate and / or epoxy resin, and 2-5% of 100-500nm titanium oxide or silicon oxide microspheres are dispersed therein.

[0010] In a preferred embodiment of the present invention, the red pixel unit, the green pixel unit and the blue pixel unit are arranged on the same plane, and the pixel units are separated by a black matrix.

[0011] In a second aspect, the utility model provides a flexible display terminal device, comprising an OLED panel and the color filter cover plate described in the first aspect; the OLED panel comprises an OLED substrate, an anode layer, a light-emitting layer, a cathode layer and an encapsulation layer stacked in sequence, the light-emitting layer (320) is a white light-emitting material layer, and the encapsulation layer and the color filter layer are bonded.

[0012] In a preferred embodiment of the utility model, the color filter layer includes a plurality of unit modules arranged on the same plane, and an insulating block (301) is arranged between each of the unit modules; the unit module includes the anode layer and the light-emitting layer; the anode layer is connected to the TFT driving unit on the OLED substrate in a one-to-one correspondence.

[0013] In a preferred embodiment of the present invention, the anode layer is indium oxide / tin.

[0014] In a preferred embodiment of the present invention, the cathode layer is a combination of one or more of Ag, Al, Li, and Mg.

[0015] In a preferred embodiment of the present invention, the encapsulation layer is an organic / inorganic laminate of at least three layers, the organic material is epoxy resin, and the inorganic material is one of SiO2, SiC, and Si3N4.

[0016] In a preferred embodiment of the present invention, the surface of the encapsulation layer has a micro-protrusion structure capable of forming a micro-lens.

[0017] In a preferred embodiment of the present invention, the encapsulation layer and the color filter layer are bonded via an OCA bonding layer, and the OCA bonding layer is doped with colorless transparent microspheres.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1) The utility model is to produce a color filter layer on the cover plate outside the display, and adopts a monochrome (white) light source, that is, the light-emitting layer is a white light-emitting material layer, and the color is formed after passing through the color filter layer. Because the light-emitting material of the OLED panel is of one kind and the oxidation rate is equal, the brightness will only decrease in the same proportion, and there will be no color deviation. Moreover, the white OLED does not require a mask for alignment, and can be directly evaporated or coated on the entire surface, which greatly reduces the process difficulty and cost.

[0020] 2) The color film layer (color filter layer) of the utility model is not arranged on the surface of the OLED display panel, but on the surface of the protective cover plate. It is at a greater distance from the metal electrode and has more layers. It can achieve a low-reflectivity display effect without a refractive layer, and the metal electrode itself is not obvious under the cover of the color filter layer. The utility model eliminates the polarizer (refractive layer) and does not need to use laminated oxides, making the device thinner and more suitable for bending.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a schematic structural diagram of the color filter cover plate described in Example 1;

[0024] Figure 2 This is a schematic diagram of the structure of a display terminal device according to Example 2 with the color filter cover plate described in Example 1.

[0025] In the figure: 100, ultra-thin glass; 110, protective layer; 120, color filter layer; 121, black matrix; 122, red pixel unit; 123, green pixel unit; 124, blue pixel unit; 200, OCA bonding layer; 300, OLED substrate; 301, insulating block; 310, anode layer; 320, light-emitting layer; 330, cathode layer; 340, encapsulation layer. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments.

[0027] Example 1

[0028] Please refer to Figure 1 This embodiment provides a flexible color filter cover, including an ultra-thin glass 100, a protective layer 110 and a color filter layer 120 stacked in sequence, that is, the protective layer 110 is attached to the surface of the ultra-thin glass 100, and the color filter layer is attached to the protective layer.

[0029] The protective layer 110 provides the ultra-thin glass 100 with impact resistance, and may be one or more layers of organic coating.

[0030] The color filter layer 120 includes a red pixel unit 122 , a green pixel unit 123 and a blue pixel unit 124 arranged on the same plane, and a black matrix 121 arranged between the pixel units. The pixel units of the three colors of RGB are blocked by the black matrix 121 .

[0031] The red pixel unit 122 , the green pixel unit 123 and the blue pixel unit 124 are respectively obtained by uniformly dispersing red, green and blue pigments in UV resin, followed by exposure and development.

[0032] The UV type resin also has 2-5% of 100-500nm titanium oxide or silicon oxide microspheres dispersed in it, which can diffuse the light in the pixel unit to obtain more uniform light, and can also reflect external light to prevent it from affecting the operation of the device.

[0033] The UV type resin is (meth)acrylate and / or epoxy resin, has good adhesion to glass, and can be directly attached to the ultra-thin glass cover.

[0034] Example 2

[0035] Please refer to Figure 2 This embodiment provides a flexible display terminal device, including an OLED panel and the color filter cover described in Example 1; the OLED panel includes an OLED substrate 300, an anode layer 310, a light-emitting layer 320, a cathode layer 330 and an encapsulation layer 340 stacked in sequence.

[0036] The light-emitting layer 320 is arranged on the surface of the anode layer 310. The light-emitting layer 320 is an OLED self-luminous material that can emit white light. The light-emitting layer 320 is formed on the surface of the anode layer 310 by evaporation. The light-emitting layer material is connected to the anode one by one. The light-emitting pixels are separated by insulating blocks 301. The insulating blocks 301 run through the light-emitting pixels and their corresponding anodes. That is, the color filter layer 120 includes a plurality of unit modules arranged on the same plane, and insulating blocks 301 are arranged between each unit module. The unit module includes the anode layer 310 and the light-emitting layer 320.

[0037] The anode layer 310 is indium oxide / tin, and is formed on the surface of the OLED substrate 300 by magnetron sputtering. The patterned anode layer 310 is formed by exposure, and the anode layer 310 is connected one by one to the TFT driving unit disposed on the OLED substrate 300.

[0038] The cathode layer 330 is disposed on the surface of the light emitting layer 320 . The cathode layer 330 and the anode layer 310 form electrodes of the OLED panel to provide a driving voltage for the OLED display material.

[0039] The cathode layer 330 is a combination of one or more metals such as Ag, Al, Li, and Mg formed by magnetron sputtering, and the cathode layer 330 is a whole surface of a metal electrode.

[0040] The encapsulation layer 340 is disposed on the surface of the cathode layer 330 , and the encapsulation layer 340 wraps the cathode layer 330 , the anode layer 310 and the light-emitting layer 320 , thereby achieving the effect of blocking water and oxygen.

[0041] The encapsulation layer 340 is an organic / inorganic laminate of at least three layers, the organic material is an epoxy resin, and the inorganic material is one of SiO2, SiC, and Si3N4. The organic material is formed by coating, and the inorganic material is formed by magnetron sputtering.

[0042] The side of the encapsulation layer 340 close to the cathode layer 330 is made of organic material. The surface of the encapsulation layer 340 has a micro-convex structure that can form a micro-lens, which diffusely reflects ambient light and increases the transmittance of the OLED panel.

[0043] The OLED panel and the cover plate are bonded together through OCA, that is, the encapsulation layer 340 and the color filter layer 120 are bonded through the OCA adhesive layer 200. One side of the OCA adhesive layer is attached to the surface of the color filter layer 120 of the cover plate, and the other side is attached to the surface of the encapsulation layer 340 of the OLED panel. The pixel units of the color filter layer 120 and the driving electrodes on the anode layer correspond one to one.

[0044] The OCA adhesive layer 200 is doped with colorless transparent microspheres, which can refract and deflect the incident light in the external environment. The OCA adhesive layer is a bendable OCA material, and the glass transition temperature is not higher than -30°C.

[0045] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A flexible color filter cover plate, characterized in that: The invention comprises an ultra-thin glass (100), a protective layer (110) and a color filter layer (120) which are stacked in sequence, wherein the color filter layer (120) comprises a red pixel unit (122), a green pixel unit (123), a blue pixel unit (124) and a black matrix (121).

2. The color filter cover plate according to claim 1, characterized in that: The red pixel unit (122) comprises a uniformly mixed red pigment and UV type resin, the green pixel unit (123) comprises a uniformly mixed green pigment and UV type resin, and the blue pixel unit (124) comprises a uniformly mixed blue pigment and UV type resin; the UV type resin is (meth)acrylate and / or epoxy resin, and contains 2-5% of 100-500nm titanium oxide or silicon oxide microspheres dispersed therein.

3. The color filter cover plate according to claim 1, characterized in that: The red pixel unit (122), the green pixel unit (123) and the blue pixel unit (124) are arranged on the same plane, and the pixel units are isolated from each other by a black matrix (121).

4. A flexible display terminal device, characterized in that: The invention comprises an OLED panel and a color filter cover plate as claimed in any one of claims 1 to 3; the OLED panel comprises an OLED substrate (300), an anode layer (310), a light-emitting layer (320), a cathode layer (330) and an encapsulation layer (340) which are stacked in sequence, the light-emitting layer (320) is a white light-emitting material layer, and the encapsulation layer (340) and the color filter layer (120) are bonded.

5. The display terminal device according to claim 4, characterized in that: The color filter layer (120) comprises a plurality of unit modules arranged on the same plane, and an insulating block (301) is arranged between each of the unit modules; the unit module comprises the anode layer (310) and a light-emitting layer (320); the anode layer (310) is connected to the TFT driving unit on the OLED substrate (300) in a one-to-one correspondence.

6. The display terminal device according to claim 4, characterized in that: The anode layer (310) is indium oxide / tin.

7. The display terminal device according to claim 4, characterized in that: The cathode layer (330) is a combination of one or more of Ag, Al, Li and Mg.

8. The display terminal device according to claim 4, characterized in that: The encapsulation layer (340) is an organic / inorganic laminate of at least three layers, the organic material is epoxy resin, and the inorganic material is one of SiO2, SiC, and Si3N4.

9. The display terminal device according to claim 4, characterized in that: The surface of the encapsulation layer (340) has a micro-protrusion structure capable of forming a micro-lens.

10. The display terminal device according to claim 4, characterized in that: The encapsulation layer (340) and the color filter layer (120) are bonded via an OCA bonding layer (200), and the OCA bonding layer (200) is doped with colorless transparent microspheres.

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