Electronic ink screens and display devices

Abstract

This utility model belongs to the field of electronic display technology and discloses an electronic ink screen and display device. The electronic ink screen includes a substrate layer; a first transparent substrate layer and a second transparent substrate layer, wherein the first and second transparent substrate layers are stacked on top of the substrate layer, and the second transparent substrate layer is located above the first transparent substrate layer; and an electronic ink layer, which is located between the first and second transparent substrate layers. The electronic ink layer contains a plurality of ink particles, each of which moves at a different rate at different heating temperatures to adjust the grayscale of the electronic ink screen. This utility model effectively improves the efficiency of grayscale adjustment of the electronic ink screen.

Description

Technical Field

[0001] This utility model belongs to the field of electronic display technology, and in particular relates to an electronic ink screen and display device. Background Technology

[0002] With the rapid development of technology, electronic display technology continues to break through and innovate. Among them, e-ink screens, with their advantages of low power consumption, wide viewing angle, and paper-like reading experience, have been widely used in e-book readers, electronic signage, wearable devices, and other fields. However, traditional e-ink screens rely mainly on electric fields to drive the movement of pigment particles when achieving grayscale changes, which has obvious limitations: First, the movement speed of pigment particles is relatively slow, resulting in a long screen response time, making it difficult to meet the requirements of fast refresh and high dynamic range display; second, due to the limited uniformity and control precision of the electric field distribution, traditional e-ink screens have low grayscale adjustment precision in local areas, making it difficult to achieve delicate display effects. In addition, changes in ambient temperature also affect the movement characteristics of pigment particles, leading to instability in display effects and limiting the application of e-ink screens in complex environments or high-precision scenarios.

[0003] Therefore, improving the efficiency of grayscale adjustment in e-ink screens is a technical problem that urgently needs to be solved. Utility Model Content

[0004] To address the issue of low efficiency in grayscale adjustment of existing e-ink screens, this invention provides an e-ink screen.

[0005] In a first aspect, this utility model provides an electronic ink screen, comprising:

[0006] Substrate layer;

[0007] A first transparent substrate layer and a second transparent substrate layer are stacked on top of the substrate layer, with the second transparent substrate layer located above the first transparent substrate layer.

[0008] An electronic ink layer is located between the first transparent substrate layer and the second transparent substrate layer. The electronic ink layer contains a plurality of ink particles, each of which moves at a different rate at different heating temperatures to adjust the grayscale of the electronic ink screen.

[0009] Furthermore, a first electrode layer and a second electrode layer are respectively disposed on the side of the first transparent substrate layer and the second transparent substrate layer near the electronic ink layer, and both the first electrode layer and the second electrode layer are provided with electrodes covering the entire surface.

[0010] Furthermore, the electronic ink screen also includes a first adhesive layer and a second adhesive layer, wherein the first adhesive layer is disposed between the substrate layer and the first transparent substrate layer, and the second adhesive layer is disposed between the electronic ink layer and the second transparent substrate layer.

[0011] Furthermore, the first adhesive layer and the second adhesive layer are made of at least one of epoxy resin adhesive, high-temperature silicone, polyurethane adhesive, and hot melt adhesive.

[0012] Furthermore, the electronic ink layer also includes multiple independent microcapsule structures, each of which encapsulates at least one ink particle.

[0013] Furthermore, the ink particles are black and white ink particles or colored ink particles, and the ink particles are one color or two colors.

[0014] Furthermore, the thickness of the electronic ink layer is 6um-120um.

[0015] Furthermore, the thickness of the first adhesive layer and the second adhesive layer is 1um-30um.

[0016] Furthermore, the materials of the first transparent substrate layer and the second transparent substrate layer are polyethylene terephthalate, polycarbonate, polyvinyl chloride, or glass.

[0017] Secondly, the present invention also provides a display device, the display device comprising an electronic ink screen as described in any of the first aspects above.

[0018] Compared with the prior art, the electronic ink screen provided by this utility model uses laser to locally heat the substrate layer. The substrate layer transfers heat to the ink particles in the electronic ink layer through the adhesive layer and the second transparent substrate layer, so that the ink particles move at different rates at different heating temperatures, thereby adjusting the grayscale of the electronic ink screen and effectively improving the movement rate of the electronic ink screen. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of an electronic ink screen provided for an embodiment of the present utility model.

[0020] Wherein, 10 is the substrate layer, 20 is the first adhesive layer, 30 is the first transparent substrate layer, 31 is the first electrode layer, 40 is the electronic ink layer, 41 is the ink particle, 42 is the microcapsule structure, 50 is the second transparent substrate layer, 51 is the second electrode layer, 60 is the heating source, 70 is the second adhesive layer, and 80 is the first direction. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0022] To make the description of this disclosure more detailed and complete, illustrative descriptions of the embodiments and specific examples of this utility model are provided below; however, this is not the only form of implementing or using the specific embodiments of this utility model. The embodiments cover the features of multiple specific embodiments and the methods, steps, and their order for constructing and operating these specific embodiments. However, other specific embodiments can also be used to achieve the same or equivalent functions and step sequences. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0023] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this utility model described herein can be implemented in sequences other than those illustrated or described herein.

[0024] In the description of the embodiments of this utility model, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The word "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more. Other quantifiers should be understood similarly. The preferred embodiments described herein are only used to illustrate and explain this utility model and are not intended to limit this utility model. Furthermore, the embodiments and features in the embodiments of this application can be combined with each other without conflict.

[0025] To address the aforementioned technical problem of low efficiency in grayscale adjustment of electronic ink screens, this invention provides an electronic ink screen, please refer to... Figure 1 , Figure 1This is a schematic diagram of an electronic ink screen according to an embodiment of the present invention. The electronic ink screen includes: a substrate layer 10; a first transparent substrate layer 30 and a second transparent substrate layer 50, wherein the first transparent substrate layer 30 and the second transparent substrate layer 50 are stacked on top of the substrate layer 10, and the second transparent substrate layer 50 is located above the first transparent substrate layer 30; and an electronic ink layer 40, wherein the electronic ink layer 40 is located between the first transparent substrate layer 30 and the second transparent substrate layer 50, and the electronic ink layer 40 contains a plurality of ink particles 41, each of which moves at a different rate at different heating temperatures to affect the electronic ink screen. In this embodiment of the invention, grayscale adjustment is performed using a heating source 60. The heat generated by the heating source 60 is conducted along a first direction 80 and diffuses outwards. This heat is then conducted through the substrate layer 10 and the first transparent substrate layer 30 to the electronic ink layer 40. The heat along the first direction in the electronic ink layer 40 is higher than the heat on the sides, resulting in uneven heating of the ink particles within the electronic ink layer 40. Due to their different chemical characteristics, the movement rate of each ink particle within the electronic ink layer varies at different heating temperatures. Different black levels create different grayscale images, thus achieving grayscale adjustment of the electronic ink layer. Compared to the traditional method of using an electric field to drive ink particles for grayscale adjustment, this method allows for more precise control of energy consumption, effectively improving the accuracy and response speed of grayscale adjustment in electronic ink layers, and solving the problems of slow response and low accuracy in traditional electronic ink layer grayscale adjustment. In addition, the e-ink screen adopts a structure in which a substrate layer 10, a first transparent substrate layer 30, an e-ink layer 40, and a second transparent substrate layer 50 are stacked. This stacked structure not only simplifies the manufacturing process but also improves the overall stability and durability of the e-ink screen.

[0026] As a further preferred embodiment, a first electrode layer 31 is provided on the side of the first transparent substrate layer 30 near the electronic ink layer 40, and a second electrode layer 51 is provided on the side of the second transparent substrate layer 50 near the electronic ink layer 40. Both the first electrode layer 31 and the second electrode layer 51 are provided with electrodes covering the entire surface, which can ensure that the electric field is evenly distributed on the electronic ink layer 40, avoid the local electric field being too strong or too weak, thereby making the arrangement of ink particles more uniform, so as to improve the clarity and stability of the display effect.

[0027] For example, the heating source 60 can be a laser heating source. The thermal driving range of each ink particle in the electronic ink layer is 45℃-60℃. If the ink particles in the electronic ink layer 40 are black and white ink particles, after the electronic ink screen is powered on, the white ink particles in the electronic ink layer 40 are above the electronic ink layer 40, and the black ink particles are below the electronic ink layer 40. After heating, the black ink particles float up and the white ink particles sink down. The movement speed of each ink particle 41 in the electronic ink layer 40 inside the electronic ink screen will also be different at different heating temperatures. Different black levels will form different gray images. When a reset is required, the electrodes between the first electrode layer 31 and the second electrode layer 41 generate an electric field, driving the black ink particles in the electronic ink layer 40 to sink down and the white ink particles to float up. When other images need to be displayed again, heat is generated again through the heating source 60. The generated heat is conducted to the electronic ink layer 40 through the substrate layer 10 and the first transparent substrate layer 30. Then, the black ink particles in the electronic ink layer 40 float up and the white ink particles sink down, and the black ink particles generate a display image in the electronic ink screen.

[0028] As a further preferred embodiment, the e-ink screen further includes a first adhesive layer 20 and a second adhesive layer 70. The first adhesive layer 20 is disposed between the substrate layer 10 and the first transparent substrate layer 30, and the second adhesive layer 70 is disposed between the e-ink layer 40 and the second transparent substrate layer 50. Specifically, in this embodiment, by providing the first adhesive layer 20 and the second adhesive layer 70 between the substrate layer 10 and the first transparent substrate layer 30, the bonding force between the substrate layer 10 and the first transparent substrate layer 30, and the bonding force between the e-ink layer 40 and the second transparent substrate layer 50, can be enhanced, preventing delamination or peeling between the layers of the e-ink screen, and improving the overall structural strength and durability of the e-ink screen. The second adhesive layer 70 is conductive, and can conduct electricity to the electrodes uniformly disposed on the entire surface of the second electrode layer 51, causing an electric field to be generated between the electrodes of the first electrode layer 31 and the second electrode layer 41, driving the ink particles of the e-ink layer 40 to move.

[0029] As a further preferred embodiment, the first adhesive layer 20 and the second adhesive layer 70 are made of at least one of epoxy resin, high-temperature silicone, polyurethane, and hot melt adhesive. Specifically, in this embodiment, the first adhesive layer 20 and the second adhesive layer 70 not only have excellent adhesion but also high-temperature resistance, and can be made of one or more combinations of epoxy resin, high-temperature silicone, polyurethane, and hot melt adhesive. The high-temperature resistance range of the first adhesive layer 20 and the second adhesive layer 70 is greater than the movement range of each ink particle in the electronic ink layer 40 when heated, specifically 60℃-80℃. It should be noted that epoxy resin and high-temperature silicone have excellent thermal stability and high-temperature resistance, which can improve the stability and service life of the electronic ink screen; polyurethane and hot melt adhesive have good bonding strength and flexibility, which can improve the overall structural strength and durability of the electronic ink screen.

[0030] As a further preferred embodiment, the electronic ink layer 40 further includes a plurality of independent microcapsule structures 42, each microcapsule structure 42 encapsulating at least one ink particle. Specifically, in this embodiment of the invention, by designing the electronic ink layer 40 as a plurality of independent microcapsule structures 42, each microcapsule structure 42 encapsulating at least one ink particle. Each microcapsule structure 42 can encapsulate multiple ink particles 41 of the same color or ink particles 41 of different colors, which can effectively avoid mutual interference between ink particles 41 during the display process, effectively improving the display accuracy and uniformity of the electronic ink screen, making the display of images or text clearer and more delicate.

[0031] As a further preferred embodiment, the ink particles 41 are black and white ink particles or colored ink particles, and the color of the ink particles is a single color or a combination of two colors. Specifically, in this embodiment of the invention, the ink particles 41 can be black and white ink particles or colored ink particles, enabling the electronic ink screen to not only achieve traditional black and white display, but also support color display, effectively expanding the function and application range of the electronic ink screen, and enabling it to meet more diverse display needs. Using single-color ink particles can simplify the manufacturing process of electronic ink displays, while a combination of two colors can increase the richness of the display effect to a certain extent without being too complex. By controlling the two colors of ink particles, a variety of visual effects can be achieved.

[0032] As a further preferred embodiment, the thickness of the electronic ink layer 40 is 6µm-120µm. It should be noted that the thickness of the electronic ink layer 40 directly affects the screen's energy consumption and performance. A thinner electronic ink layer 40 can reduce the driving voltage and energy consumption, while a thicker electronic ink layer can provide a higher ink particle capacity and enhance the display effect. In this embodiment, setting the thickness of the electronic ink layer to 6µm-120µm allows the electronic ink screen to achieve the optimal balance between energy consumption and performance.

[0033] As a further preferred embodiment, the thickness of the first adhesive layer 20 and the second adhesive layer 70 is 1µm-30µm. Specifically, in this embodiment of the invention, by setting the thickness of the first adhesive layer 20 and the second adhesive layer 70 between 1µm and 30µm, it is possible to ensure that the adhesive layer has sufficient adhesion and uniformity when bonding the substrate layer 10 and the first transparent substrate layer, the electronic ink layer 40 and the second transparent substrate layer 50, effectively enhancing the overall structural stability of the electronic ink screen and preventing problems such as poor adhesion due to the first adhesive layer 20 being too thin or delamination due to the first adhesive layer 20 being too thick.

[0034] As a further preferred embodiment, the substrate layer 10 is made of a conductive substrate. In this embodiment, by setting the substrate layer 10 to a conductive substrate glass, it is possible to ensure that the substrate layer 10 has good conductivity, facilitating the attachment of subsequent layers and circuit layout. For example, the substrate layer 10 can be made of conductive glass, which has high mechanical strength and hardness, providing better support and protection for the e-ink screen, making it less susceptible to damage from external impacts or pressure, thus improving the durability of the e-ink screen.

[0035] As a further preferred embodiment, the materials of the first transparent substrate layer 30 and the second transparent substrate layer 50 are polyethylene terephthalate, polycarbonate, polyvinyl chloride, or glass. Specifically, in this embodiment of the invention, polyethylene terephthalate, polycarbonate, polyvinyl chloride, or glass have good optical transparency, which can reduce the scattering and reflection of light in the first transparent substrate layer 30 and the second transparent substrate layer 50, thereby improving the display clarity and contrast of the e-ink screen, making the images or text appear clearer on the screen.

[0036] On the other hand, this utility model also provides a display device, which includes the electronic ink screen described in any of the above claims. The beneficial effects of the display device can be referenced from the beneficial effects of the electronic ink screen described above, and this utility model will not elaborate further.

[0037] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The above embodiments only illustrate preferred implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An electronic ink screen, characterized by include: Substrate layer; A first transparent substrate layer and a second transparent substrate layer are stacked on top of the substrate layer, with the second transparent substrate layer located above the first transparent substrate layer. An electronic ink layer is located between the first transparent substrate layer and the second transparent substrate layer. The electronic ink layer contains a plurality of ink particles, each of which moves at a different rate at different heating temperatures to adjust the grayscale of the electronic ink screen.

2. The electronic ink screen according to claim 1, wherein, The first transparent substrate layer and the second transparent substrate layer are respectively provided with a first electrode layer and a second electrode layer on the side near the electronic ink layer, and both the first electrode layer and the second electrode layer are provided with electrodes covering the entire surface.

3. The electronic ink screen of claim 1, wherein, The electronic ink screen further includes a first adhesive layer and a second adhesive layer, wherein the first adhesive layer is disposed between the substrate layer and the first transparent substrate layer, and the second adhesive layer is disposed between the electronic ink layer and the second transparent substrate layer.

4. The electronic ink screen according to claim 3, wherein, The first adhesive layer and the second adhesive layer are made of at least one of epoxy resin, high-temperature silicone, polyurethane, and hot melt adhesive.

5. The electronic ink screen of claim 1, wherein, The electronic ink layer also includes multiple independent microcapsule structures, each of which encapsulates at least one ink particle.

6. The electronic ink screen according to claim 5, wherein, The ink particles are black and white ink particles or colored ink particles, and the color of the ink particles is a single color or a combination of two colors.

7. The electronic ink screen of claim 1, wherein, The thickness of the electronic ink layer is 6um-120um.

8. The electronic ink screen of claim 3, wherein, The thickness of the first adhesive layer and the second adhesive layer is 1um-30um.

9. The electronic ink screen of claim 1, wherein, The materials of the first transparent substrate layer and the second transparent substrate layer are polyethylene terephthalate, polycarbonate, polyvinyl chloride or glass.

10. A display device, characterized by comprising: The display device includes an electronic ink screen as described in any one of claims 1-9.

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