Electronic paper screen module
By integrating a light-transmitting section in the substrate and positioning the LED lamp to transmit light through the substrate, the electronic paper screen module addresses size and cost issues, achieving efficient and cost-effective display without enlarging the frame.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- HANSHOW TECH CO LTD
- Filing Date
- 2023-11-20
- Publication Date
- 2026-05-11
AI Technical Summary
Conventional electronic paper screen modules face issues with increased size and cost due to the installation of LED lamps outside the thin film transistor substrate, necessitating a larger PCB substrate to avoid light shielding, which is inefficient and costly.
The electronic paper screen module incorporates a substrate with a light-transmitting section and a circuit board where the LED lamp is positioned opposite the light-transmitting element, allowing light transmission through the substrate, reducing the need for a larger circuit board area and maintaining a good display effect.
This design effectively reduces the size and cost of the electronic paper screen by allowing the LED lamp to be installed within the substrate boundaries, ensuring efficient light transmission and maintaining display functionality without enlarging the frame.
Smart Images
Figure 2026514540000001_ABST
Abstract
Description
Related Applications
[0001] This application claims the priority of a Chinese patent application filed on May 5, 2023, with application number 202321082624.3, and incorporates the content disclosed in the above patent application as part of this application.
Technical Field
[0002] This application relates to the field of electronic display technology, and particularly to electronic paper screen modules.
Background Art
[0003] An electronic paper screen module is a display based on electrophoretic display technology. By applying a driving voltage to each pixel point through a control circuit on a substrate (i.e., a TFT substrate) 100, the effect of displaying an image is realized. In order to realize various functions such as status display and position notification by the electronic paper screen module, the application of lighting elements of the electronic paper screen module is becoming increasingly widespread. As shown in FIGS. 1 and 2, in conventional products, an LED lamp 200 is installed on a PCB substrate 300 (here, the PCB substrate 300 is laminated on the back of the thin film transistor substrate 100 and connected to the thin film transistor substrate 100 through a flexible circuit board 400 to realize signal transmission with the electronic paper screen.), and in many cases, functions such as status display and flashing notification are realized. However, in the case of existing electronic paper screen modules, since it is not translucent within the range of the thin film transistor substrate 100, in order to efficiently transmit light, the LED lamp 200 must be installed outside the range of the thin film transistor substrate 100 to avoid light shielding by the thin film transistor substrate 100. However, according to such an installation form, the size of the PCB substrate 300 inevitably becomes large, not only increasing the frame size of the electronic paper screen, but also causing the problem of increasing the cost of the PCB substrate 300.
[0004] Regarding the problem that the size and cost of the electronic paper screen increase due to the installation of related technology LED lamps, there is no effective solution in reality.
[0005] Therefore, based on the experience and practice gained from many years of work in the relevant industry, the inventor proposes an electronic paper screen module to overcome the shortcomings of existing technologies. [Disclosure of the Invention]
[0006] The present invention aims to provide an electronic paper screen module that can reduce the size of the electronic paper screen and lower costs by forming a light-transmitting region on the electronic paper screen within the boundaries of the substrate, and by installing an LED lamp at a position corresponding to the light-transmitting region, thereby ensuring a good display effect even when the LED lamp is located within the boundaries of the substrate.
[0007] The objective of this application can be achieved by the following technical solution.
[0008] This application relates to an electronic paper screen module, A substrate having a first light-transmitting section, A circuit board in which at least some positions are laminated on a substrate, The present invention provides an electronic paper screen module including a light-emitting element provided on a circuit board, which is positioned opposite the location of the first light-transmitting element so that the emitted light rays can be transmitted from one side of the board to the other side facing the circuit board through the first light-transmitting element.
[0009] In one embodiment of the present invention, the electronic paper screen module further includes an electronic paper film and a protective film made of a light-transmitting material, and the substrate, the electronic paper film and the protective film are arranged in a laminated manner from the side closer to the light-emitting element toward the side further away from the light-emitting element.
[0010] In one embodiment of the present application, a second light-transmitting portion is provided on the electronic paper film, and a light-transmitting passage is formed by the first light-transmitting portion, the second light-transmitting portion, and the position of the protective film opposite the second light-transmitting portion.
[0011] In one embodiment of the present invention, a plurality of electrical contacts are provided between the electronic paper film and the substrate for connecting the electrodes of the substrate and the electrodes of the electronic paper film, A second light-transmitting portion is provided at the location of at least one electrical contact, and a light-transmitting passage is formed by the first light-transmitting portion, the second light-transmitting portion, and the position of the protective film opposite the second light-transmitting portion.
[0012] In one embodiment of the present invention, a first connecting portion made of a light-transmitting material is provided between the protective film and the substrate, surrounding the outer periphery of the electronic paper film. A light-transmitting passage is formed by the first light-transmitting portion, the position of the first connecting portion facing the first light-transmitting portion, and the position of the protective film facing the first light-transmitting portion.
[0013] In one embodiment of the present application, a second light-transmitting portion is provided at the edge of the electronic paper film, and a light-transmitting passage is formed by the first light-transmitting portion, the second light-transmitting portion, the position of the first connecting portion opposite the first light-transmitting portion, and the position of the protective film opposite the first light-transmitting portion. In the direction of light emission, a first connection part is provided opposite to the location of the first light-transmitting part, and a first light-mixing element is provided downstream of the second light-transmitting part to uniformly emit the light rays.
[0014] In one embodiment of the present application, the first connecting portion is made of a border-retaining material that is translucent or semi-translucent.
[0015] In one embodiment of the present invention, a second connecting portion made of a light-transmitting material is provided on the substrate for fixing the connection position between the circuit board and the substrate. A light-transmitting passage is formed by the first light-transmitting portion and the position of the second connecting portion opposite the first light-transmitting portion.
[0016] In one embodiment of the present application, a light-transmitting passage is formed by the first light-transmitting portion, the position of the second connecting portion facing the first light-transmitting portion, the position of the first connecting portion facing the first light-transmitting portion, and the position of the protective film facing the first light-transmitting portion. In the direction of light emission, a first connection part, a second connection part, and a second light-mixing element for uniformly emitting light are provided downstream of the protective film, opposite to the location of the first light-transmitting part.
[0017] In one embodiment of the present invention, the second connecting portion is made of an adhesive that is translucent or semi-translucent.
[0018] In one embodiment of the present invention, the circuit board is a flexible circuit board that extends to a position overlapping the substrate and is provided with light-emitting elements.
[0019] In one embodiment of the present invention, the circuit board includes a flexible circuit board and a PCB substrate connected to the substrate via the flexible circuit board, located in a place overlapping the substrate, and provided with a light-emitting element.
[0020] As described above, the electronic paper screen module of the present invention has the following features and advantages: at least a portion of the circuit board is laminated onto the substrate, a first light-transmitting portion is formed on the substrate, a light-emitting element is installed on the circuit board and positioned opposite the first light-transmitting portion, and by installing the first light-transmitting portion in this manner, the substrate has the ability to efficiently transmit light rays, and the light rays emitted from the light-emitting element are transmitted through the light-transmitting passage from one side of the substrate to the other side opposite the circuit board, thereby ensuring the normal operation of the light-emitting element. Furthermore, there is no need to increase the area of the circuit board to install the light-emitting element, and a good light-emitting effect can be guaranteed even if the light-emitting element is located within the range of the substrate, which is advantageous for reducing the size of the electronic paper screen and lowering costs. [Brief explanation of the drawing]
[0021] The following drawings are not intended to limit the scope of this application, but are provided for illustrative purposes and interpretation. [Figure 1] This is a front view of an electronic paper screen module based on existing technology. [Figure 2] This is a rear view of an existing electronic paper screen module. [Figure 3] Figure 1 is a longitudinal sectional view of the electronic paper screen module of the present application. [Figure 4] Figure 1 is a front view of the electronic paper screen module of the present application. [Figure 5] Figure 1 is a rear view of the electronic paper screen module of the present application. [Figure 6] Figure 2 is a longitudinal sectional view of the electronic paper screen module of the present application. [Figure 7] Figure 2 is a front view of the electronic paper screen module of the present application. [Figure 8] Figure 2 is a rear view of the electronic paper screen module of the present application. [Figure 9] Figure 3 is a longitudinal sectional view of the electronic paper screen module of the present application. [Figure 10] Figure 3 is a front view of the electronic paper screen module of the present application. [Figure 11] Figure 3 is a rear view of the electronic paper screen module of the present application. [Figure 12] Figure 4 is a longitudinal sectional view of the electronic paper screen module of the present application. [Figure 13] Figure 4 is a front view of the electronic paper screen module of the present application. [Figure 14] Figure 4 is a rear view of the electronic paper screen module of the present application. [Figure 15] Figure 5 is a longitudinal sectional view of the electronic paper screen module of the present application. [Figure 16] Figure 6 is a longitudinal sectional view of the electronic paper screen module of the present application. [Figure 17] Figure 7 is a longitudinal sectional view of the electronic paper screen module of the present application. [Figure 18] Figure 8 is a longitudinal sectional view of the electronic paper screen module of the present application.
[0022] Reference numerals in the background art section: 100: Thin film transistor substrate, 200: LED lamp, 300: PCB substrate, 400: Flexible circuit board. Reference numerals in the present application: 1: Circuit board, 101: Glass plate, 102: Thin-film transistor array, 1021: First translucent part, 2: Electronic paper film, 201: Second translucent section, 3: Protective film, 4: Electrical contacts, 5: First connection point, 6: Second connection point, 7: Integrated circuits, 8: PCB board, 9: Light-emitting element, 10: Flexible circuit board, 11:Transparent passage, 12: First optical mixing element, 13: Circuit board, 14: Second light-mixing element. Best mode for carrying out the invention.
[0023] To provide a clearer understanding of the technical features, objectives, and effects of this application, specific embodiments will be described below with reference to the drawings.
[0024] As shown in Figures 3 to 18, the present invention provides an electronic paper screen module, which includes a substrate 1, a circuit board 13, and a light-emitting element 9, wherein the substrate 1 is provided with a first light-transmitting portion 1021, at least a portion of the circuit board 13 is laminated with the substrate 1, and the light-emitting element 9 is provided on the circuit board 13, and the circuit board 13 has a position where it overlaps with the substrate 1, so that by providing the light-emitting element 9 on the circuit board 13 at a position facing the first light-transmitting portion 1021, light rays emitted from the light-emitting element 9 are transmitted through the first light-transmitting portion 1021 from one side of the substrate 1 to the other side facing the circuit board 13 (that is, by providing the first light-transmitting portion 1021, light rays emitted from the light-emitting element 9 can pass through the substrate 1).
[0025] In this invention, at least a portion of the circuit board 13 is laminated with the substrate 1, a first light-transmitting portion 1021 is formed on the substrate 1, and the light-emitting element 9 is provided on the circuit board 13 facing the position of the first light-transmitting portion 1021. By providing the first light-transmitting portion 1021, the substrate 1 is made capable of efficiently transmitting light rays, and the light rays emitted from the light-emitting element 9 are transmitted through the first light-transmitting portion 1021 from one side of the substrate 1 to the other side facing the circuit board 13, thereby ensuring the normal use of the light-emitting element 9 (status indicator, flashing warning, etc.), without the need to increase the area of the circuit board 13 to provide the light-emitting element 9, without the need to increase the frame of the electronic paper screen, and without ensuring a good light-emitting effect even if the light-emitting element 9 is located within the range of the substrate 1, which is advantageous for reducing the size and cost of the electronic paper screen.
[0026] Furthermore, the light-emitting element 9 may be an LED lamp, but is not limited to it. In one possible embodiment of the present invention, as shown in Figures 3 to 18, the electronic paper screen module further includes an electronic paper film 2 (FPL) and a protective film 3 (PS), and the substrate 1, electronic paper film 2, and protective film 3 are stacked in a direction from the side closer to the light-emitting element 9 to the side further away from the light-emitting element 9. Here, the electronic paper film 2 displays an image that is actually visible to the eye, and the electronic paper film 2 is in close contact with the substrate 1, so that an electric field capable of driving the electronic ink in the electronic paper film 2 to display an image is formed between the substrate 1 (i.e., the pixel electrodes of the substrate 1) and the electronic paper film 2 (i.e., the VCOM ITO electrodes of the electronic paper film 2). In order to achieve good reflective properties, black particles, white particles, and other color particles are densely distributed in the electronic ink of the electronic paper film 2, so that the electronic paper film 2 is not light-transmitting. When the electronic ink is removed from any area of the electronic paper film 2 (while the VCOM ITO electrodes of the electronic paper film 2 are retained), the area of the electronic paper film 2 from which the electronic ink has been removed will have good light transmittance.
[0027] Furthermore, the protective film 3 is made of a light-transmitting material and adheres closely to the electronic paper film 2, covering and protecting the electronic paper film 2, thereby blocking moisture. Here, by forming the protective film 3 from a colorless and transparent thin film, good light transmittance of the protective film 3 is guaranteed, ensuring that the protective film 3 fulfills its protective role without affecting the transmission of light rays.
[0028] In this embodiment, the protective film 3 has a larger area than the electronic paper film 2, and the protective film 3 surrounds the edges of the electronic paper film 2, thereby providing optimal protection and moisture barrier.
[0029] In one possible embodiment of the present invention, as shown in Figures 3 to 5, a first light-transmitting portion 1021 is provided on the substrate 1, a second light-transmitting portion 201 is provided on the electronic paper film 2, and a light-transmitting passage 11 is formed by the first light-transmitting portion 1021, the second light-transmitting portion 201 and the position of the protective film 3 facing the second light-transmitting portion 201.
[0030] Specifically, as shown in Figures 3 to 5, the light-transmitting passage 11 is formed within the area of the upper right corner of the electronic paper screen, but in actual production, the position of the light-emitting element 9 may be adjusted according to the needs. In this embodiment, the setting size of the circuit board 13 is not limited by the light-emitting element 9, so the size of the circuit board 13 can be reduced to within the range that overlaps with the substrate 1. Since the light rays emitted from the light-emitting element 9 must pass through the substrate 1, the electronic paper film 2, and the protective film 3 in order, the light-emitting element 9 must be ensured to have good light transmittance in the direction from which the light rays are emitted in order to effectively transmit the light rays. The protective film 3 is made of a light-transmitting material, so no separate setting process is required. On the other hand, in the case of the first light-transmitting portion 1021 provided on the substrate 1, the purpose of light transmission can be achieved by forming an area without a metal pattern at the corresponding position on the substrate 1, and the position of the first light-transmitting portion 1021 should be opposite to the position of the light-emitting element 9 and its size should be greater than or equal to the size of the light-emitting element 9. Furthermore, if the requirement for light transmission intensity is not high, a partially transparent region having a metal pattern can be formed at the corresponding position on the substrate 1 (i.e., the region is not a completely transparent region, but a semi-transparent or partially transparent region), and the position and size of the partially transparent region can be set according to the specific circumstances. In the case of the second light-transmitting portion 201 of the electronic paper film 2, the purpose of light transmission can be achieved by forming a light-transmitting region from which the electronic ink has been removed at the corresponding position on the electronic paper film 2, and the position of the second light-transmitting portion 201 should be opposite to the position of the light-emitting element 9 and the size should be greater than or equal to the size of the light-emitting element 9. Furthermore, if the requirement for light transmission intensity is not high, the size of the second light-transmitting portion 201 can be set according to the specific circumstances.
[0031] In one possible embodiment of the present invention, as shown in Figures 6 to 8, a plurality of electrical contacts 4 are formed between the electronic paper film 2 and the substrate 1 (i.e., Ag paste dots, whose main component is a conductive silver paste, which has a silvery-white metallic luster and is not translucent), and each of the plurality of electrical contacts 4 connects an electrode on the substrate 1 (i.e., a VCOM electrode) to an electrode on the electronic paper film 2 (i.e., a VCOM ITO electrode). Here, the electrical contacts 4 may be in the shape of a round dot or a line (i.e., the plurality of electrical contacts 4 are connected to form a line). Furthermore, the electrical contacts 4 may be designed in any shape according to the actual design needs.
[0032] In this embodiment, as shown in Figures 6 to 8, a first light-transmitting portion 1021 is provided on the substrate 1, and a second light-transmitting portion 201 is provided at the location of at least one electrical contact 4. A light-transmitting passage 11 is formed by the first light-transmitting portion 1021, the second light-transmitting portion 201, and the position of the protective film 3 opposite the second light-transmitting portion 201.
[0033] Specifically, as shown in Figures 6 to 8, the light-transmitting passage 11 is formed at the location of the electrical contact 4 on the right side of the electronic paper screen. However, in an actual product, the light-transmitting passage 11 may be formed at one or two of the two electrical contacts 4, and the number and specific location of the electrical contacts 4 are not limited. In this embodiment, the size of the circuit board 13 is not limited by the light-emitting element 9, so the size of the circuit board 13 can be reduced to within the range that overlaps with the substrate 1. Since the light rays emitted from the light-emitting element 9 must pass through the substrate 1, the electrical contacts 4, the electronic paper film 2, and the protective film 3 in order, the light-emitting element 9 must be ensured to have good light transmittance in the direction of emission so that the light rays can pass through effectively. Since the protective film 3 is made of a light-transmitting material, no separate processing is required. On the other hand, in the case of the first light-transmitting portion 1021 provided on the substrate 1, the purpose of light transmission can be achieved by forming a region without a metal pattern at the corresponding position on the substrate 1, and the position of the first light-transmitting portion 1021 should be opposite to the position of the light-emitting element 9 and its size should be greater than or equal to the size of the light-emitting element 9. Furthermore, if the requirement for light transmission intensity is not high, a partially transparent region having a metal pattern can be formed at the corresponding position of the substrate 1 (i.e., the region is not a completely transparent region, but a semi-transparent or partially transparent region), and the position and size of the partially transparent region can be set according to the specific circumstances.In the case of an electrical contact 4, the electrical contact 4 can be removed at the position where the light-transmitting passage 11 is formed, or a transparent conductive paste can be used as the electrical contact 4 to form a light-transmitting region and achieve the purpose of light transmission.The position of the light-transmitting region should be opposite to the position of the light-emitting element 9 and the size should be greater than or equal to the size of the light-emitting element 9, and if the requirement for light transmission intensity is not high, the size of the light-transmitting region can be set according to the specific circumstances.Furthermore, if the requirement for light transmission intensity is not high, a partially transparent region can be formed at the corresponding position of the electrical contact 4 (i.e., the region is not a completely transparent region, but a semi-transparent or partially transparent region), and the position and size of the partially transparent region can be set according to the specific circumstances.In the case of the second light-transmitting portion 201 on the electronic paper film 2, the purpose of light transmission can be achieved by forming a light-transmitting region on the corresponding position of the electronic paper film 2 where the electronic ink has been removed. The second light-transmitting portion 201 should be positioned opposite the position of the light-emitting element 9 and be larger than or equal to the size of the light-emitting element 9. Furthermore, if the requirement for light transmission intensity is not high, the size of the second light-transmitting portion 201 can be set according to the specific circumstances.
[0034] In one possible embodiment of the present invention, as shown in Figures 9 to 11, a first connecting portion 5 made of a light-transmitting material is provided between the protective film 3 and the substrate 1, and the first connecting portion 5 surrounds the outer periphery of the electronic paper film 2. Here, the first connecting portion 5 is made of a light-transmitting or semi-light-transmitting edge sealing material, and furthermore, the first connecting portion 5 is a sealing paste, and by placing the sealing paste between the protective film 3 and the substrate 1, it can further block moisture.
[0035] In this embodiment, as shown in Figures 9 to 11, a first light-transmitting portion 1021 is provided on the substrate 1, and a light-transmitting passage 11 is formed by the first light-transmitting portion 1021, the position of the first connecting portion 5 facing the first light-transmitting portion 1021, and the position of the protective film 3 facing the first light-transmitting portion 1021.
[0036] Specifically, as shown in Figures 9 to 11, the light-transmitting passage 11 is formed in the lower right corner region of the electronic paper screen, but in the actual product, any region corresponding to the first connection portion 5 can be selected as the location of the light-transmitting passage 11. In this embodiment, since the size of the circuit board 13 is not limited by the light-emitting element 9, it is possible to reduce the size of the circuit board 13 to within the range that overlaps with the substrate 1. Since the light rays emitted from the light-emitting element 9 must pass through the substrate 1, the first connection portion 5 and the protective film 3 in order, it is necessary to ensure that the substrate 1 and the first connection portion 5 have good light transmittance in the direction of emission so that the light rays can pass through effectively. Since the protective film 3 is made of a light-transmitting material, no separate processing is required. On the other hand, in the case of the first light-transmitting portion 1021 provided on the substrate 1, the purpose of light transmission can be achieved by forming a region without a metal pattern at the corresponding position on the substrate 1, and the position of the first light-transmitting portion 1021 should be opposite to the position of the light-emitting element 9 and its size should be greater than or equal to the size of the light-emitting element 9. Furthermore, if the requirement for light transmission intensity is not high, a partially transparent region having a metal pattern can be formed at the corresponding position on the substrate 1 (i.e., the region is not a completely transparent region, but a semi-transparent or partially transparent region), and the position and size of the partially transparent region can be set according to the specific circumstances. In the case of the first connection part 5, a transparent sealing paste with excellent light transmission can be selected. Furthermore, if the requirement for light transmission intensity is not high, a semi-transparent sealing paste with partial light transmission can also be selected for the first connection part 5. In one possible embodiment of the present invention, as shown in Figure 15, a second light-transmitting portion 201 is provided at the edge of the electronic paper film 2, and a light-transmitting passage 11 is formed by the first light-transmitting portion 1021, the second light-transmitting portion 201, the position of the first connecting portion 5 facing the first light-transmitting portion 1021, and the position of the protective film 3 facing the first light-transmitting portion 1021. In the direction of light emission, a first light-mixing element 12 is provided downstream of the first connecting portion 5 facing the position of the first light-transmitting portion 1021 and the second light-transmitting portion 201 to uniformly emit light rays.
[0037] Specifically, as shown in Figure 15, a light-transmitting passage 11 is formed at the edge of the electronic paper film 2, where a portion of the light-transmitting passage 11 is located in the electronic paper film 2 and the other portion is located in the first connecting portion 5 (i.e., the sealing paste).
[0038] In the light-transmitting passage 11 corresponding to the electronic paper film 2, the light rays emitted from the light-emitting element 9 must sequentially pass through the substrate 1, the electronic paper film 2, and the protective film 3. Therefore, the substrate 1 and the electronic paper film 2 must be ensured to have good light transmittance in the direction of emission so that the light rays can pass through effectively. Since the protective film 3 is made of a light-transmitting material, no separate processing is required. On the other hand, in the case of the first light-transmitting portion 1021 provided on the substrate 1, the purpose of light transmission can be achieved by forming a region without a metal pattern at the corresponding position on the substrate 1. The position of the first light-transmitting portion 1021 should be opposite to the position of the light-emitting element 9 and its size should be greater than or equal to the size of the light-emitting element 9. Furthermore, if the requirement for light transmission intensity is not high, a partially light-transmitting region with a metal pattern can be formed at the corresponding position on the substrate 1 (i.e., the region is not a completely light-transmitting region, but a semi-light-transmitting or partially light-transmitting region), and the position and size of the partially light-transmitting region can be set according to the specific circumstances. In the case of the second light-transmitting portion 201 provided on the electronic paper film 2, the purpose of light transmission can be achieved by forming a light-transmitting region where the electronic ink has been removed at the corresponding position on the electronic paper film 2. The second light-transmitting portion 201 should be positioned opposite the position of the light-emitting element 9 and be larger than or equal to the size of the light-emitting element 9. Furthermore, if the requirement for light transmission intensity is not high, the size of the second light-transmitting portion 201 can be set according to the specific circumstances.
[0039] At the location corresponding to the first connection portion 5 in the light-transmitting passage 11, the light rays emitted from the light-emitting element 9 must sequentially pass through the substrate 1, the first connection portion 5, and the protective film 3. Therefore, it is necessary to ensure that the substrate 1 has good light transmittance in the direction of emission so that the light rays can pass through effectively. Since the protective film 3 is made of a light-transmitting material, no separate processing is required. On the other hand, in the case of the first light-transmitting portion 1021 provided on the substrate 1, the purpose of light transmission can be achieved by forming a region without a metal pattern at the corresponding location on the substrate 1. The position of the first light-transmitting portion 1021 should be opposite to the position of the light-emitting element 9 and its size should be greater than or equal to the size of the light-emitting element 9. Furthermore, if the requirement for light transmission intensity is not high, a partially light-transmitting region with a metal pattern can be formed at the corresponding location on the substrate 1 (i.e., the region is not a completely light-transmitting region, but a semi-transmitting or partially light-transmitting region), and the position and size of the partially light-transmitting region can be set according to the specific circumstances. In the case of the first connection portion 5, a transparent sealing paste with excellent light transmittance can be selected. Furthermore, if the requirements for light transmission intensity are not high, a semi-transparent sealing paste with partial light transmission can be selected for the first connection part 5.
[0040] In this embodiment, the light-transmitting passage 11 is partially located at the electronic paper film 2 and partially located at the first connection portion 5. Since there is a difference in emission intensity between the position corresponding to the electronic paper film 2 and the position corresponding to the first connection portion 5, in order to eliminate the difference in emission intensity and achieve a good visual effect, the first light-mixing element 12 must be installed in this embodiment to achieve uniform emission intensity. Here, as the first light-mixing element 12, an atomizing film can be used, or a light-mixing structure having a plurality of recesses and a plurality of protrusions (i.e., an uneven surface) can be used.
[0041] In one possible embodiment of the present invention, as shown in Figures 12 to 14, a second connecting portion 6 made of a translucent material is provided on the substrate 1, and the second connecting portion 6 fixes the connection position between the circuit board 13 and the substrate 1. Since the second connecting portion 6 is located on the surface of the substrate 1, it can cover the circuit on the substrate 1 and the connection position between the circuit board 13 and the substrate 1, thereby protecting the circuit structure. Here, the second connecting portion 6 is made of a translucent or semi-translucent adhesive. Furthermore, the second connecting portion 6 may, but is not limited to, a UV paste.
[0042] In this embodiment, as shown in Figures 12 to 14, a first light-transmitting portion 1021 is provided on the substrate 1, and a light-transmitting passage 11 is formed by the first light-transmitting portion 1021 and the position of the second connecting portion 6 facing the first light-transmitting portion 1021.
[0043] Specifically, as shown in Figures 12 to 14, the light-transmitting passage 11 is formed in the area to the right of the welding region (i.e., the location of the second connection portion 6) where the electronic paper screen is provided on the substrate 1. However, in an actual product, any area corresponding to the second connection portion 6 can be selected as the location for forming the light-transmitting passage 11. In this embodiment, the size of the circuit board 13 is not limited by the light-emitting element 9, so the size of the circuit board 13 can be reduced to within the range that overlaps with the substrate 1. Since the light rays emitted from the light-emitting element 9 must sequentially pass through the substrate 1 and the second connection portion 6, it is necessary to ensure that the substrate 1 and the second connection portion 6 have good light transmission in the direction of emission so that the light rays can pass through effectively. In the case of the first light-transmitting portion 1021 provided on the substrate 1, the purpose of light transmission can be achieved by forming an area without a metal pattern at the corresponding location on the substrate 1. The first light-transmitting portion 1021 should be located opposite the location of the light-emitting element 9 and be larger than or equal to the size of the light-emitting element 9. Furthermore, if the requirement for light transmission intensity is not high, a partially transparent region having a metal pattern can be formed at the corresponding position on the substrate 1 (i.e., the region is not a completely transparent region, but a semi-transparent or partially transparent region), and the position and size of the partially transparent region can be set according to the specific circumstances. In the case of the second connection part 6, a transparent UV paste or other transparent protective paste with excellent light transmission properties can be selected, and if the requirement for light transmission intensity is not high, the second connection part 6 can be a translucent UV paste or other type of translucent protective paste with partial light transmission properties.
[0044] In other possible embodiments of the present invention, as shown in Figure 16, a light-transmitting passage 11 is formed by the first light-transmitting portion 1021, the position of the second connecting portion 6 facing the first light-transmitting portion 1021, the position of the first connecting portion 5 facing the first light-transmitting portion 1021, and the position of the protective film 3 facing the first light-transmitting portion 1021. In the direction of light emission, a second light-mixing element 14 is provided downstream of the protective film 3 and the first connecting portion 5 and the second connecting portion 6 facing the position of the first light-transmitting portion 1021 to uniformly emit the light.
[0045] Specifically, as shown in Figure 16, a light-transmitting passage 11 is formed at the edge of the protective film 3, where a portion of the light-transmitting passage 11 is located between the first connection portion 5 (i.e., the sealing paste) and the protective film 3, and the other portion is located between the second connection portion 6 (i.e., the UV paste or other transparent protective paste).
[0046] In the area corresponding to the protective film 3 in the light-transmitting passage 11, the light rays emitted from the light-emitting element 9 must sequentially pass through the substrate 1, the first connection part 5, and the protective film 3. Therefore, to ensure that the light rays can pass through effectively, the substrate 1 and the first connection part 5 must be made of a light-transmitting material and do not require any additional processing. In the case of the first light-transmitting portion 1021 provided on the substrate 1, the purpose of light transmission can be achieved by forming a region without a metal pattern at the corresponding position on the substrate 1. The position of the first light-transmitting portion 1021 should be opposite to the position of the light-emitting element 9 and its size should be greater than or equal to the size of the light-emitting element 9. Furthermore, if the requirement for light transmission intensity is not high, a partially light-transmitting region with a metal pattern can be formed at the corresponding position on the substrate 1 (i.e., the region is not a completely light-transmitting region, but a semi-transmitting or partially light-transmitting region), and the position and size of the partially light-transmitting region can be set according to the specific circumstances. In the case of the first connection part 5, a transparent sealing paste with excellent light transmission properties can be selected. Furthermore, if the requirements for light transmission intensity are not high, a semi-transparent sealing paste with partial light transmission can be selected for the first connection part 5.
[0047] At the location corresponding to the second connection portion 6 in the light-transmitting passage 11, the light rays emitted from the light-emitting element 9 must sequentially pass through the substrate 1 and the second connection portion 6. Therefore, to ensure that the light rays can pass through effectively, the substrate 1 and the second connection portion 6 must be made of a light-transmitting material and therefore do not require any additional processing. In the case of the first light-transmitting portion 1021 provided on the substrate 1, the purpose of light transmission can be achieved by forming a region without a metal pattern at the corresponding location on the substrate 1. The first light-transmitting portion 1021 should be located opposite the location of the light-emitting element 9 and be larger than or equal to the size of the light-emitting element 9. Furthermore, if the requirement for light transmission intensity is not high, a partially light-transmitting region with a metal pattern can be formed at the corresponding location on the substrate 1 (i.e., the region is not a completely light-transmitting region, but a semi-transmitting or partially light-transmitting region), and the location and size of the partially light-transmitting region can be set according to the specific circumstances. Furthermore, in the case of the second connection part 6, a transparent UV paste with excellent light transmission or other transparent protective paste can be selected, and if the requirement for light transmission intensity is not high, the second connection part 6 can be a semi-transparent UV paste with partial light transmission or other type of semi-transparent protective paste.
[0048] In this embodiment, part of the light-transmitting passage 11 is located between the protective film 3 and the first connection 5, and the other part is located between the protective film 3 and the second connection 6. Since there is a difference in emission intensity between the position corresponding to the protective film 3 and the first connection 5 and the position corresponding to the second connection 6, in order to eliminate the difference in emission intensity and achieve a good visual effect, a second light-mixing element 14 must be installed in this embodiment to achieve uniform emission intensity. Here, as the second light-mixing element 14, an atomizing film can be used, or a light-mixing structure having a plurality of recesses and a plurality of protrusions (i.e., an uneven surface) can be used.
[0049] In one possible embodiment of the present invention, as shown in Figure 3, the substrate 1 is a thin-film transistor substrate, comprising a glass plate 101 and a thin-film transistor array 102 provided on the glass plate 101, with a plurality of electrical contacts 4 (i.e., Ag paste points) provided between the electronic paper film 2 and the substrate 1. The glass plate 101 is provided with a conductive structure, and an integrated circuit 7 is provided on the thin-film transistor array 102 inside the first connection portion 5. The electrical contacts 4 are connected to the integrated circuit 7 via the conductive structure, and the integrated circuit 7 is connected to a control circuit on a circuit board 13, supplying power to the electronic paper screen through the circuit board 13, and controlling timing signals and data signals by the control circuit on the circuit board 13. Furthermore, as shown in Figure 18, the integrated circuit 7 can also be mounted on the circuit board 13. In this embodiment, by forming a light-transmitting passage 11 in the substrate 1, it is possible to install the light-emitting element 9 within the range of the substrate 1, and the electronic paper screen module can be designed with a narrow bezel, thereby reducing the size of the electronic paper screen and achieving the objective of reducing the cost of the electronic paper screen. On the other hand, the specific circuit structure used in the electronic paper screen module and the position where the integrated circuit 7 is provided are not limited in this application. In this application, the glass plate 101 is a light-transmitting plate.
[0050] Furthermore, the second connection portion 6 can be made of UV paste, allowing the integrated circuit 7 to be installed on the substrate 1 by thermal pressure bonding via the second connection portion 6, and further allowing the circuit board 13 and the substrate 1 to be connected by thermal pressure bonding via the second connection portion 6.
[0051] In this application, as shown in Figure 3, a substrate 1, an electronic paper film 2, and a protective film 3 are laminated together, and an electrical contact 4 connects a VCOM electrode on the substrate 1 to a VCOM ITO electrode on the electronic paper film 2. A thin-film transistor array 102 is provided on the substrate 1. The electronic paper film 2 displays an image that is actually visible to the eye, and an electric field is formed between the VCOM electrode on the substrate 1 and the VCOM ITO electrode on the electronic paper film 2 to drive the electronic ink in the electronic paper film 2 to display the image. An integrated circuit 7 is connected to a circuit board 13, and a control circuit is provided on the circuit board 13. Signal transmission occurs between the control circuit and the electronic paper film 2, and the integrated circuit 7 converts the signal transmitted from the control circuit into a voltage and timing signal that drives and updates the electronic paper film 2.
[0052] Furthermore, as shown in Figure 3, the circuit board 13 includes a flexible circuit board 10 and a PCB board 8 (rigid printed circuit board), where the PCB board 8 is connected to the board 1 via the flexible circuit board 10, the PCB board 8 is positioned to overlap the board 1, and the light-emitting element 9 is provided on the PCB board 8. The PCB board 8 and the board 1 are connected via the flexible circuit board 10, and the PCB board 8 is positioned to overlap the board 1.
[0053] Furthermore, as shown in Figure 17, the circuit board 13 is simply a flexible circuit board 10, and all the circuits originally provided on the PCB board 8 are provided on the flexible circuit board 10. Due to the bending performance of the flexible circuit board 10 itself, the flexible circuit board 10 can be extended to a position where it overlaps with the board 1, and the light-emitting element 9 is provided on the flexible circuit board 10. In this embodiment, by forming a light-transmitting passage 11 in the board 1, the light-emitting element 9 can be installed within the range of the board 1, and the objective of designing the electronic paper screen module with a narrow bezel, reducing the size of the electronic paper screen, and reducing the cost of the electronic paper screen can be achieved.
[0054] The electronic paper screen module of this application has the following features and advantages. According to this electronic paper screen module, by installing the first light-transmitting portion 1021 within the range of the substrate 1, the light-emitting element 9 is installed on the circuit board 13 (i.e., the flexible circuit board 10 and / or PCB board 8) facing the position of the first light-transmitting portion 1021, positioning it within the range of the substrate 1, and ensuring that the light rays emitted from the light-emitting element 9 can be effectively transmitted through the substrate 1, thereby achieving a narrower bezel and lower cost for the electronic paper screen module.
[0055] The above are illustrative and specific embodiments of the present application and do not limit the scope of the present application. Equivalent changes and modifications that can be obtained by a person skilled in the art without deviating from the ideas and principles of the present application are all included within the scope of protection of the present application.
Claims
1. An electronic paper screen module, A substrate having a first light-transmitting section, A circuit board in which at least some positions are laminated on the substrate, An electronic paper screen module characterized by including a light-emitting element provided on the circuit board, positioned opposite the first light-transmitting element such that the emitted light rays are transmitted through the first light-transmitting element from one side of the board to the other side facing the circuit board.
2. The present invention further includes an electronic paper film and a protective film made of a light-transmitting material. The electronic paper screen module according to claim 1, characterized in that the substrate, the electronic paper film, and the protective film are arranged in a stacked manner from the side closest to the light-emitting element toward the side away from the light-emitting element.
3. The electronic paper screen module according to claim 2, characterized in that the electronic paper film is provided with the second light-transmitting portion, and a light-transmitting passage is formed by the first light-transmitting portion, the second light-transmitting portion, and the position of the protective film opposite the second light-transmitting portion.
4. Between the electronic paper film and the substrate, there are multiple electrical contacts for connecting the electrodes of the substrate and the electrodes of the electronic paper film, respectively. The electronic paper screen module according to claim 2, characterized in that a second light-transmitting portion is provided at the location of at least one of the electrical contacts, and a light-transmitting passage is formed by the first light-transmitting portion, the second light-transmitting portion, and the position of the protective film opposite the second light-transmitting portion.
5. A first connecting portion, made of a light-transmitting material, is provided between the protective film and the substrate, surrounding the outer periphery of the electronic paper film. The electronic paper screen module according to claim 3, characterized in that the light-transmitting passage is formed by the first light-transmitting portion, the position of the first connection portion facing the first light-transmitting portion, and the position of the protective film facing the first light-transmitting portion.
6. A second light-transmitting portion is provided at the edge of the electronic paper film, and the light-transmitting passage is formed by the first light-transmitting portion, the second light-transmitting portion, the position of the first connecting portion facing the first light-transmitting portion, and the position of the protective film facing the first light-transmitting portion. The electronic paper screen module according to claim 5, characterized in that, in the direction of emission of the light rays, a first light mixing element for uniformly emitting the light rays is provided downstream of the second light-transmitting portion and a first connecting portion facing the location of the first light-transmitting portion.
7. The electronic paper screen module according to claim 5 or 6, characterized in that the first connecting portion is made of a translucent or semi-translucent edge-fastening material.
8. The substrate is provided with a second connecting portion made of a light-transmitting material for fixing the connection position between the circuit board and the substrate. The electronic paper screen module according to claim 5, characterized in that the light-transmitting passage is formed by the position of the first light-transmitting portion and the second connecting portion opposite the first light-transmitting portion.
9. The light-transmitting passage is connected by the first light-transmitting portion, the position of the second connecting portion facing the first light-transmitting portion, the position of the first connecting portion facing the first light-transmitting portion, and the position of the protective film facing the first light-transmitting portion. The electronic paper screen module according to claim 8, characterized in that, in the direction of emission of the light rays, a second light mixing element for uniformly emitting the light rays is provided downstream of the first connection portion, the second connection portion, and the protective film, which are opposite to the location of the first light-transmitting portion.
10. The electronic paper screen module according to claim 8 or 9, characterized in that the second connecting portion is made of a light-transmitting or semi-light-transmitting adhesive.
11. The electronic paper screen module according to claim 1, characterized in that the circuit board is a flexible circuit board that extends to a position overlapping the board and is provided with the light-emitting element.
12. The electronic paper screen module according to claim 1, characterized in that the circuit board includes a flexible circuit board and a PCB board connected to the board via the flexible circuit board, located in a place overlapping the board, and on which the light-emitting element is provided.