Front light touch assembly of ink screen

Abstract

The utility model relates to the field of ink screens, and discloses a front light touch assembly of an ink screen, which comprises a light guide structure, and the light guide structure comprises a light guide plate; a first touch circuit layer is formed on the lower surface of the light guide plate, the upper surface of the light guide plate is connected with a protection panel through a cementing layer, and a second touch circuit layer is formed on the lower surface of the protection panel. A traditional complex multi-layer structure is abandoned, materials are simplified, and the cost of the raw materials is greatly reduced; and due to the simple structure and the concise process, the production process is greatly simplified. The process steps are simplified, the productivity is improved, the defective product rate caused by the complex process can be effectively reduced, material and manpower waste caused by reworking is reduced, and the cost and efficiency are controlled from the production source.

Description

Technical Field

[0001] This utility model relates to the technical field of e-ink screens, and in particular to a front light touch component for an e-ink screen. Background Technology

[0002] E-ink displays, also known as electronic paper displays, are a new type of display technology. Their display principle involves charged white and black particles within microcapsules moving up and down under the influence of an electric field, thus creating images with different grayscale levels. E-ink displays have many unique advantages, such as display quality close to traditional paper, non-reflective in sunlight, comfortable reading experience, and extremely low power consumption, only consuming power when refreshing the page. Therefore, they have been widely used in e-book readers, electronic tags, and other fields.

[0003] In today's era of booming digital reading and writing, e-ink devices, especially various products equipped with e-ink screens such as e-readers, e-notebooks, and smart writing tablets, have become deeply integrated into people's learning, work, and life. As the user base continues to expand and usage needs become more diversified and refined, the requirements for the performance and cost control of the front-light touch components of e-ink screens are rising.

[0004] Traditional e-ink screen front-light touch components have adopted a complex architectural design to achieve basic lighting and touch functions. Many products simply aim for uniform light coverage of the e-ink display area, employing overly complex light guide systems. Around the main light-generating plate, layers of auxiliary diffuser plates and irregularly shaped reflectors are stacked, forcing light to repeatedly travel between these components, undergoing cumbersome refraction and reflection processes, resulting in a maze-like optical path. The light source layout lacks any scientific basis, merely a high-density stacking of high-power LED beads, completely disregarding the laws of light propagation and the problem of interference between LED beads. This leads to severely excessive energy consumption, overheating of the device, significantly reducing battery life, and accelerating component aging. The touch control is equally problematic. To barely maintain touch accuracy and response speed, manufacturers blindly stack multiple layers of sensing structures. The bottom layer is a thick pressure-sensitive substrate, the middle layer is filled with intricate circuit connections, and the top layer is covered with interaction electrodes, lacking efficient integration and planning. This not only makes the components bulky and significantly thicker, but also introduces many hidden dangers to signal transmission, such as touch latency and frequent accidental touches. From a manufacturing perspective, the production process of traditional e-ink screen front-facing optical touch components is complex and costly. Utility Model Content

[0005] The purpose of this invention is to provide a front-light touch component for an e-ink screen, which aims to solve the problems in the prior art.

[0006] This application provides a front light touch component for an e-ink screen, including a light guide structure, the light guide structure including a light guide plate; a first touch circuit layer is formed on the lower surface of the light guide plate, the upper surface of the light guide plate is connected to a protective panel through an adhesive layer, and a second touch circuit layer is formed on the lower surface of the protective panel.

[0007] Furthermore, the adhesive layer is OCA optically transparent adhesive.

[0008] Furthermore, the light guide structure also includes light sources disposed on both sides of the light guide plate, and the light guide layer is used to reflect and scatter the light emitted by the light source so that the light shines on the electronic paper display module of the e-ink screen.

[0009] Furthermore, the front light touch component also includes an electronic paper display module, which is used to display content.

[0010] Furthermore, the electronic paper display module includes a transparent substrate, an electronic paper film layer located on the transparent substrate, and a first protective layer located on the side of the electronic paper film layer facing away from the transparent substrate.

[0011] Furthermore, the light guide plate is made of optical-grade PMMA with a light transmittance greater than 93% and a refractive index of 1.48-1.50.

[0012] Furthermore, the light source contains multiple SMD LED beads arranged in a golden ratio spacing, with a single bead power of 0.2W, a color temperature of 6000K, a color rendering index of 90, and includes a reflector and a diffuser.

[0013] Furthermore, the adhesive strength of the OCA optically transparent adhesive is greater than 950 gf / cm. 2 The thickness is 0.12-0.18mm.

[0014] Furthermore, the protective panel is made of high-alumina-silicon reinforced glass.

[0015] Compared with existing technologies, the novel e-ink screen front-light touch component of this utility model has many significant and valuable advantages over traditional products: This application abandons the traditional complex multi-layer structure, simplifies materials, and significantly reduces raw material costs. For example, expensive components used in traditional components to achieve uniform light distribution, such as multiple auxiliary diffusers, reflectors, and precious metal electrodes selected for touch accuracy, are all optimized and replaced in this utility model. Thanks to the simple structure and streamlined process, the production process is greatly simplified. The streamlined process not only increases production capacity but also effectively reduces the defect rate caused by complex processes, reduces material and manpower waste caused by rework, and controls costs and efficiency from the source of production. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the structure of a front light touch component for an e-ink screen provided in an embodiment of this utility model. Detailed Implementation

[0017] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0018] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0022] The implementation of this utility model will be described in detail below with reference to specific embodiments.

[0023] Reference Figure 1 A front light touch component for an e-ink screen includes a light guide structure, the light guide structure including a light guide plate 1; a first touch circuit layer 4 is formed on the lower surface of the light guide plate 1, the upper surface of the light guide plate 1 is connected to a protective panel 3 through an adhesive layer, and a second touch circuit layer 5 is formed on the lower surface of the protective panel.

[0024] Compared with existing technologies, the novel e-ink screen front-light touch component of this utility model has many significant and valuable advantages over traditional products: This application abandons the traditional complex multi-layer structure, simplifies materials, and significantly reduces raw material costs. For example, expensive components used in traditional components to achieve uniform light distribution, such as multiple auxiliary diffusers, reflectors, and precious metal electrodes selected for touch accuracy, are all optimized and replaced in this utility model. Thanks to the simple structure and streamlined process, the production process is greatly simplified. The streamlined process not only increases production capacity but also effectively reduces the defect rate caused by complex processes, reduces material and manpower waste caused by rework, and controls costs and efficiency from the source of production.

[0025] Furthermore, the adhesive layer is OCA optically transparent adhesive 2. OCA optically transparent adhesive 2 has good light transmittance while also having excellent adhesive properties.

[0026] Furthermore, the light guide structure also includes light sources disposed on both sides of the light guide plate 1. The light guide layer is used to reflect and scatter the light emitted by the light sources, so that the light shines on the e-paper display module of the e-ink screen. Specifically, e-paper display panels generally require ambient light sources (such as natural light, artificial light, etc.) to be visible to users. If there is a lack of ambient light sources (e.g., on a bus at night, in a dark outdoor space, etc.), no light will shine on the e-paper panel, making it impossible for users to view the content. Therefore, by setting light sources on the sides of the light guide plate 1, the light sources can be turned on when there is no external light source. The light emitted by the light sources is reflected and scattered by the light guide plate 1 and then shines on the e-paper display module of the e-ink screen, avoiding the technical problem of the e-paper display panel being unusable in dark environments.

[0027] Furthermore, the front light touch component also includes an electronic paper display module, which is used to display content.

[0028] Furthermore, the electronic paper display module includes a transparent substrate, an electronic paper film layer on the transparent substrate, and a first protective layer on the side of the electronic paper film layer facing away from the transparent substrate. The electronic paper film layer can utilize any one of the following technologies to achieve its display function: electrophoretic display technology, electronic powder fluid display technology, cholesteric liquid crystal display technology, or bistable nematic liquid crystal display technology. The transparent substrate also includes a driving circuit connected to the electronic paper film layer. This driving circuit not only drives the electronic paper film layer to operate but also adjusts the specific structure within the electronic paper film layer to achieve single-sided or double-sided display of the electronic paper display module. In one specific embodiment, the first protective layer protects the electronic paper film layer. Then, encapsulating adhesive is applied around the electronic paper film layer to encapsulate it, preventing water, oxygen, and other contaminants from entering and corroding the electronic paper film layer.

[0029] Furthermore, the light guide plate 1 is made of optical-grade PMMA with a light transmittance greater than 93% and a refractive index of 1.48-1.50. This material provides excellent light reflection and scattering properties for the light guide plate 1.

[0030] Furthermore, the light source contains multiple SMD LED beads arranged in a golden ratio spacing, with a single bead power of 0.2W, a color temperature of 6000K, a color rendering index of 90, and includes a reflector and a diffuser.

[0031] Furthermore, the adhesive strength of OCA optically transparent adhesive is greater than 950 gf / cm. 2 The thickness is 0.12-0.18mm.

[0032] Furthermore, the protective panel 3 is made of high-alumina-silicon reinforced glass.

[0033] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0034] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A front light touch assembly for an ink screen, characterized by, The light guide structure comprises a light guide plate; a first touch circuit layer is formed on the lower surface of the light guide plate; the upper surface of the light guide plate is connected with a protective panel through a glue layer; and a second touch circuit layer is formed on the lower surface of the protective panel. The front light touch assembly further comprises an electronic paper display module for displaying content. The electronic paper display module comprises a transparent substrate, an electronic paper film layer on the transparent substrate, and a first protective layer on the side of the electronic paper film layer away from the transparent substrate.

2. A front light touch assembly for an ink screen according to claim 1, wherein, The glue layer is OCA optical transparent glue.

3. The front light touch assembly of claim 1, wherein, The light guide structure further comprises light sources arranged on both sides of the light guide plate; the light guide layer is used for reflecting and scattering light emitted by the light sources so that the light irradiates on the electronic paper display module of the ink screen.

4. The front light touch assembly of claim 1, wherein, The material of the light guide plate is optical grade PMMA, the light transmittance is greater than 93%, and the refractive index is 1.48-1.

50.

5. A front light touch assembly for an ink screen according to claim 3, wherein, The light source comprises a plurality of SMD LED lamp beads, which are arranged according to the golden ratio division interval, the single power is 0.2W, the color temperature is 6000K, the color rendering index reaches 90, and the light source comprises a reflecting cup and a light scattering film.

6. A front light touch assembly for an ink screen according to claim 2, wherein, The bonding strength of the OCA optical transparent glue is greater than 950gf / cm², and the thickness is 0.12-0.18mm.

7. The front light touch assembly of claim 1, wherein, The protective panel is high-aluminum-silicon strengthened glass.

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