Color electronic paper display module structure and display device

Abstract

The utility model discloses a color electronic paper display module structure and a display device, and relates to the technical field of electronic paper color display. The color electronic paper display module structure comprises a protective film layer, an optical adhesive layer and a PET layer which are arranged in a stacked mode. A color ink layer is arranged between the PET layer and the optical adhesive layer. Or a color ink layer is arranged between the protective film layer and the optical adhesive layer; the color ink layer is provided with a plurality of transparent grooves, each groove is filled with color ink, the color of the ink filled in each groove is one, and the color ink is red ink, green ink and blue ink. The color ink is filled in the groove, the edge of the ink is flat and cannot diffuse or be mixed with other colors, the thickness of the color ink layer is controllable, the structure is light and thin, multi-color display of the electronic paper can be achieved in combination with waveform debugging of a software algorithm, the optical quality is good, and the application field of the electronic paper is expanded.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic paper color display technical field especially, a kind of color electronic paper display module structure and display device. BACKGROUND

[0002] Electronic paper is a kind of by reflecting light, like paper reading comfortable, ultra-thin light, ultra-low power consumption, widely used in electronic book reader, table card, price tag. Current mainstream is 2 color black and white display, so the range of product available is limited, with the improvement of people's demand, color electronic paper emerges as the times require. Need to solve how to realize the multicolor display problem of electronic paper product, to broaden the application scenario of electronic paper product. UTILITY MODEL CONTENT

[0003] The technical problem to be solved by the utility model is to provide a scheme capable of realizing diversified color display.

[0004] To solve the above problems, the utility model provides the following technical scheme:

[0005] A color electronic paper display module structure, the color electronic paper display module structure includes laminatedly arranged protective film layer, optical adhesive layer and PET layer;Color ink layer is arranged between PET layer and optical adhesive layer;Or, color ink layer is arranged between protective film layer and optical adhesive layer;The color ink layer is provided with a plurality of transparent grooves, each groove is filled with color ink, and the color of the ink filled in each groove is one, and the color ink is red ink, green ink and blue ink.

[0006] Further technical scheme thereof is that the depth of the groove is 0.001-0.010 mm.

[0007] Further technical scheme thereof is that the wall thickness of the groove is 0.001-0.020 mm.

[0008] Further technical scheme thereof is that the total light transmittance of the groove is greater than or equal to 85%, and the hardness is above 3H.

[0009] Further technical scheme thereof is that the volume of the groove is less than or equal to 0.100 mm 3 .

[0010] Further technical scheme thereof is that the ink amount filled in each groove is less than or equal to the volume of the groove.

[0011] Further technical scheme thereof is that the color electronic paper display module structure further includes laminatedly arranged ITO layer, electronic ink layer and TFT substrate layer, and the ITO layer is attached to the PET layer.

[0012] Further, the viscosity of the color ink is 30-70 dpa.s.

[0013] Further, the shape of the groove includes at least one of a rectangle, a circle, a triangle, an ellipse, a pentagon, and a hexagon.

[0014] The utility model also provides a color electronic paper display device, including above described color electronic paper display module structure.

[0015] Compared with the prior art, the utility model can achieve the technical effects including:

[0016] The color electronic paper display module structure and the display device provided by the utility model have the color ink layer arranged between the PET layer and the optical adhesive layer, or arranged between the protective film layer and the optical adhesive layer, the color ink layer is provided with a plurality of grooves, each groove is filled with color ink, and the color of the ink filled in each groove is one kind. The color ink is filled in the groove, the ink edge is flat and cannot spread or mix with other colors, the thickness of the color ink layer is controllable, the structure is light and thin, the debugging of the waveform can be realized by combining the software algorithm, the multicolor display of the electronic paper is realized, the optical quality is good, and the application field of the electronic paper is expanded. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the utility model embodiment, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0018] Figure 1 It is an electronic paper display module structure schematic diagram in the prior art.

[0019] Figure 2 It is a color electronic paper display module structure schematic diagram provided by an embodiment of the utility model.

[0020] Figure 3 It is a color electronic paper display module structure schematic diagram provided by another embodiment of the utility model.

[0021] Figure 4 It is an ink edge shape schematic diagram of the color ink layer in the color electronic paper display module provided by the embodiment of the utility model.

[0022] Figure 5 It is an ink edge shape schematic diagram of the color ink layer lacking groove structure in the color electronic paper display module provided by other embodiments.

[0023] Figure 6 The multi-color color development schematic diagram of the color ink layer in the color electronic paper display module is provided.

[0024] Figure 7 The color display schematic diagram of each pixel point in the color electronic paper display module is provided.

[0025] Reference signs

[0026] TFT substrate layer 1, adhesive 2, electronic ink layer 3, ITO layer 4, PET layer 5, optical adhesive layer 6, protective film layer 7, edge sealing adhesive 8, color ink layer 9, protective layer 91, groove 92, driving chip 10, FPC 11. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application, and similar components are denoted by similar reference signs in the drawings. Obviously, the embodiments to be described are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0028] It should be understood that, when used in the specification and the appended claims, the terms "comprise" and "include" indicate the presence of the described features, integers, steps, operations, elements, and / or components, but do not exclude one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0029] It should also be understood that the terms used in the specification of the present application embodiments are only for the purpose of describing specific embodiments and are not intended to limit the present application embodiments. As used in the specification of the present application embodiments and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0030] Referring to Figure 1 , which is a schematic diagram of an electronic paper display module structure in the prior art. As shown in the figure, it comprises, from top to bottom, a protective film layer 7, an optical adhesive layer 6, a PET layer 5, an ITO (indium tin oxide) layer 4, an electronic ink layer 3, and a TFT substrate layer 1.

[0031] The protective film layer 7 is a PS (Polystyrene) film or a PS glass, mainly used for protecting the PET layer 5. Since dust is easily deposited on the PET layer 5 after long-time use of the module, the protective film layer 7 arranged on the PET layer 5 can prevent dust and water vapor from entering, and avoid the surface of the PET layer 5 being scratched by a hard object and the product being disabled due to water vapor, thereby increasing the service life of the electronic paper display module.

[0032] The material of the optical adhesive layer 6 is OCA (Optically Clear Adhesive) optical adhesive, which has the advantages of colorless transparency, light transmittance of more than 90%, good adhesive strength, curing at high temperature, and small curing shrinkage.

[0033] The material of the PET layer 5 is polyethylene glycol terephthalate (PET) material, which has the advantages of good transparency and good electrical insulation.

[0034] The material of the ITO layer 4 is an indium tin oxide (ITO) conductive film. Since the ITO conductive film has good light transmittance and excellent thermal stability, and the PET material of the PET layer 4 has good electrical insulation performance, even at high temperature, the safety is high, and the visual effect is good.

[0035] The electronic ink layer 3 contains a plurality of small microcapsules, and the microcapsules encapsulate black positive particles and white negative particles. The electronic ink layer 3 is fixed to the TFT substrate layer 1 by an adhesive 3.

[0036] The TFT substrate layer 1 includes a TFT (Thin Film Transistor) thin film transistor and a FPC (Flexible Printed Circuit) 11 flexible circuit board. The TFT thin film transistors are arranged in an array and controlled by a driving chip 10. The TFT substrate layer 1 is connected to the FPC 11 flexible circuit board.

[0037] The protective film layer 7, the optical adhesive layer 6, the PET layer 5, the ITO layer 4, and the electronic ink layer 3 are all sealed and waterproofed by the edge sealing adhesive 8.

[0038] The edge sealing adhesive 8 is an EC (Edge Coating) adhesive, which is an epoxy resin type thermosetting adhesive.

[0039] The electronic paper display module is powered on, and when powered on, the voltage generates an electric field between the ITO conductive film of the electronic paper module and the TFT substrate layer. The electric field causes the positive and negative particles in the electronic ink layer in the middle of the electronic paper display module to be driven according to different electric fields, so that the particles of different black and white colors are arranged in order, and different changing images are presented.

[0040] Embodiment 1

[0041] Based on the structure of the electronic paper display module in the prior art, the present embodiment provides a color electronic paper display module structure. As shown in the figure, the color electronic paper display module structure of the present embodiment is provided with a color ink layer 9 between the PET layer 5 and the optical adhesive layer 6; the color ink layer 9 is provided with a plurality of transparent grooves 92, and each groove 92 is filled with color ink. The color of the ink filled in each groove 92 is one kind. Figure 2

[0042] Further, in the present embodiment, the depth of the groove 92 is 0.001-0.010mm, and the ink can at least fill the bottom of the groove 92. This depth range can ensure that the structure of the entire display module is light and thin and controllable. With the design of the present embodiment, it is not necessary to strictly control the amount of ink in each groove 92, but only to control the filling of the bottom of the groove 92.

[0043] Further, in the present embodiment, the volume of the groove 92 is less than or equal to 0.100mm 3 Within the volume range of the groove 92, the amount of ink in different grooves 92 is allowed to be different, because after filling the ink, optical adhesive is used to cover and close the opening of each groove 92 to form the optical adhesive layer 6, which can effectively prevent the problem of uneven filling caused by the thickness difference of different inks and the appearance of bubbles.

[0044] In other embodiments, the thickness of the optical adhesive layer 6 is between 0.005-0.175mm. In the present embodiment, the thickness of the optical adhesive layer 6 is 0.125mm.

[0045] Further, in the present embodiment, the groove 92 is obtained by pressing a transparent material. In other embodiments, the groove 92 is obtained by etching a transparent material.

[0046] In the present embodiment, the total light transmittance of the groove is ≥85%, and the hardness is above 3H, which can have better display effect and hardness.

[0047] In the present embodiment, the color ink is red ink, green ink and blue ink, and the viscosity of the color ink is 30-70dpa.s. Under this viscosity range, the flowability of the ink is moderate, which can make the ink fill the groove smoothly. ​

[0048] For example, in the present embodiment, a plurality of grooves 92 are made on the side of the PET layer 5 away from the ITO layer 4 using a UV (Ultraviolet) light-curable material, and red (R), green (G), and blue (B) color inks are respectively applied to the grooves 92.

[0049] It can be understood that the amount of ink filled in the grooves 92 of different colors can be the same or different, and the area filled with ink needs to cover the bottom surface of the groove 92, and the depth of the ink can be less than the depth of the groove 92. Those skilled in the art can adjust it according to the actual situation, and the present application does not limit it.

[0050] In other embodiments, the shape of the groove 92 includes at least one of a rectangle, a circle, a triangle, an ellipse, a pentagon, and a hexagon.

[0051] For example Figure 4 , the shape of the groove 92 is a rectangle. It can be understood that due to the limitation of the shape of the groove, the ink in different grooves 92 fills the bottom of the groove 92, which presents the characteristics of smooth and beautiful color shape.

[0052] For example Figure 5 , in other embodiments, the color ink layer 9 lacks the groove 92 structure, which can cause problems such as uneven ink edges and easy mixing of different colors of ink.

[0053] In other embodiments, the wall thickness of the groove 92 is 0.001-0.020 mm. In the present embodiment, the wall thickness of the groove 92 is 0.020 mm.

[0054] It can be understood that the existing electronic paper EPL (electronic paper label, EPL) film structure includes an electronic ink layer 3, an ITO layer 4, a PET layer 5, and an optical adhesive layer 6. In the scheme of the present embodiment, by optimizing the structure of the electronic paper EPL film, a color ink layer 9 is arranged between the PET layer 5 and the optical adhesive layer 6, and the multi-color display of the electronic paper can be realized.

[0055] The present embodiment also provides a color electronic paper display device, which includes the color electronic paper display module structure described above.

[0056] The color electronic paper display module structure and display device provided by the present embodiment have controllable color ink layer thickness, light and thin structure, and can realize multi-color display of the electronic paper by combining software algorithm with waveform debugging, have good optical quality, and expand the application field of the electronic paper.

[0057] Embodiment 2

[0058] The embodiment provides a color electronic paper display module structure based on the electronic paper display module structure in the prior art. Figure 3 As shown in the figure, the color electronic paper display module structure of the embodiment is provided with a color ink layer 9 between the protective film layer 7 and the optical adhesive layer 6, and the color ink layer 9 is stacked with the optical adhesive layer 6 through a protective layer 91; the color ink layer 9 is provided with a plurality of grooves 92 (the structure of the grooves 92 is not shown in the figure), and each groove 92 is filled with color ink. Figure 3 The color of the ink filled in each groove 92 is one kind.

[0059] It can be understood that in the scheme of the embodiment, the structure of the electronic paper EPL film is not changed, and the existing electronic paper EPL film can be used. The electronic paper EPL film includes an electronic ink layer 3, an ITO layer 4, a PET layer 5 and an optical adhesive layer 6.

[0060] In the embodiment, the protective film layer 7 is PS glass or a PS film. The grooves 92 are arranged on the inner surface of the PS glass or the PS film, the red ink (R), the green ink (G) and the blue ink (B) are filled into the grooves 92 to form the color ink layer 9, and then a protective layer 91 is attached to the surface of the color ink layer 9 to prevent the red ink (R), the green ink (G) and the blue ink (B) from falling off, and to fill the height difference caused by the uneven thickness of the ink itself, so that the surface is flat, and the PS glass or the PS film containing the color ink layer 9 is obtained.

[0061] In the embodiment, the material of the protective layer 91 is the same as that of the optical adhesive layer 6.

[0062] The embodiment further provides a color electronic paper display device including the color electronic paper display module structure.

[0063] The color electronic paper display module structure and the color electronic paper display device obtained through the embodiment 1 and the embodiment 2 are adjusted through a special waveform, so that the RGB three primary colors of the color ink layer are mixed, and each pixel point can form multi-color display. Figure 6-7 As shown in the figure.

[0064] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0065] The above describes the specific implementation manner of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A color electronic paper display module structure, characterized in that, The color electronic paper display module structure comprises a protective film layer, an optical adhesive layer and a PET layer which are stacked; a color ink layer is arranged between the PET layer and the optical adhesive layer; or a color ink layer is arranged between the protective film layer and the optical adhesive layer; the color ink layer is provided with a plurality of transparent grooves, each groove is filled with color ink, the color of the ink filled in each groove is one kind, and the color ink is red ink, green ink and blue ink. 2.The color electronic paper display module structure of claim 1, wherein, The depth of the groove is 0.001-0.010 mm. 3.The color electronic paper display module structure of claim 1, wherein, The wall thickness of the groove is 0.001-0.020 mm. 4.The color electronic paper display module structure of claim 1, wherein, The total light transmittance of the groove is greater than or equal to 85%, and the hardness is greater than or equal to 3H. 5.The color electronic paper display module structure of claim 1, wherein, The volume of the recess is less than or equal to 0.100 mm 3 . 6.The color electronic paper display module structure of claim 1, wherein, The shape of the groove comprises at least one of a rectangle, a circle, a triangle, an ellipse, a pentagon and a hexagon. 7.The color electronic paper display module structure of claim 1, wherein, The viscosity of the color ink is 30-70 dpa.s. 8.The color electronic paper display module structure of claim 1, wherein, The color electronic paper display module structure further comprises an ITO layer, an electronic ink layer and a TFT substrate layer which are stacked, and the ITO layer is attached to the PET layer. 9.The color electronic paper display module structure of claim 1, wherein, The amount of ink filled in each groove is less than or equal to the volume of the groove.

10. A color electronic paper display device, characterized by comprising: The color electronic paper display module structure comprises the color electronic paper display module structure according to any one of claims 1-9.

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