Electronic paper display device
By integrating the circuit that drives the TFT substrate and the light emitting component in the electronic paper display device, the light emitting structure is simplified, the problems of complex construction of the light emitting module and high process cost are solved, and the low-cost and low-difficulty manufacturing of the electronic paper module is realized.
Patent Information
- Application Number
- CN202420007757.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-02
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-01-02
AI Technical Summary
The light emitting modules in existing electronic paper display devices are complex in construction, which makes it difficult to manufacture and cannot achieve serial production, which increases process costs.
The circuit driving the TFT substrate and the circuit driving the light emitting component are integrated on the same flexible circuit board, forming a first circuit area and a second circuit area, and electrically connecting the TFT substrate and the light emitting component through the flexible circuit board to simplify the light emitting structure. , realize integrated circuit design.
It reduces the manufacturing difficulty of the electronic paper display device, simplifies the manufacturing process of the luminescent module, realizes the series-connected process of the electronic paper module, and reduces the manufacturing cost.
Smart Images
Figure CN222145361U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of electronic paper module manufacturing process, and in particular to an electronic paper display device. Background Art
[0002] In the display field, electronic paper (i.e., electronic ink screen) is a special display screen with delicate picture display and wide viewing angle. Its biggest advantage is good visibility in sunlight without blind spots. Since electronic paper itself does not emit light, it relies on reflected light to display content. If there is insufficient external light source, it is necessary to set a light-emitting module on the electronic paper to provide light source through the light-emitting module so that the electronic paper has sufficient brightness to display content.
[0003] At present, the light-emitting module of electronic paper is composed of a light-emitting strip, a light guide plate and a light-shielding tape. Since the light-emitting module needs to be bonded to the light guide plate first, and the light-shielding tape is set on the light-emitting strip, and then the light-emitting module is bonded to the electronic paper module, the stacking structure is relatively complicated, which leads to a relatively cumbersome manufacturing process. In addition, because the manufacturing process of the light-emitting module needs to be added, the serial production of the electronic paper module cannot be realized, resulting in an increase in the manufacturing process and maintenance cost of the electronic paper module. Utility Model Content
[0004] The embodiment of the present application provides an electronic paper display device, which solves the problem that the light-emitting modules in the current electronic paper display devices are complex in stacking and cannot be produced in series.
[0005] In order to solve the above technical problems, this application is implemented as follows:
[0006] An electronic paper display device is provided, which includes an electronic paper module, a flexible circuit board and a light-emitting component. The electronic paper module has a TFT substrate, an electronic paper display unit and a light guide plate, the electronic paper display unit is arranged on the TFT substrate, and the light guide plate is arranged on the electronic paper display unit. The flexible circuit board is arranged on one side of the electronic paper module. The flexible circuit board includes a first circuit area and a second circuit area, and the first circuit area is electrically connected to the TFT substrate. The light-emitting component is located on one side of the electronic paper display unit, the light-emitting component is electrically connected to the second circuit area, and the light-emitting surface of the light-emitting component faces the light guide plate.
[0007] In one embodiment, the flexible circuit board further includes a connection area, and the connection area is located between the first circuit area and the second circuit area.
[0008] In one embodiment, the flexible circuit board has a first surface and a second surface opposite to the first surface, the first circuit area and the second circuit area are located on the first surface, the connection area is located on the second surface, and the connection area of the flexible circuit board is fixed on the TFT substrate.
[0009] In one of the embodiments, it further includes: a first waterproof glue, the first waterproof glue is arranged between the TFT substrate and the second surface of the flexible circuit board, and the first waterproof glue corresponds to the second circuit area.
[0010] In one of the embodiments, it further includes: a second waterproof adhesive, and the second circuit area of the flexible circuit board and the light guide plate are bonded to each other through the second waterproof adhesive.
[0011] In one embodiment, the flexible circuit board has a first body and a second body, the second body extends inward from the first body, the first circuit area and the connection area are located in the first body, and the second circuit area is located in the second body.
[0012] In one embodiment, the light-emitting component is disposed on the second body, the light guide plate has a receiving groove, the light-emitting component is located in the receiving groove, and the second body covers the notch of the receiving groove.
[0013] In one embodiment, a groove wall of a side of the accommodating groove of the light guide plate adjacent to the electronic paper display unit has a micro-structure surface, and light from the light-emitting component is incident into the light guide plate from the micro-structure surface.
[0014] In one embodiment, the accommodating groove of the light guide plate has a reinforcement structure on a side away from the electronic paper display unit.
[0015] In one embodiment, the electronic paper module further comprises a driving component, which is disposed on the TFT substrate and is located between the electronic paper display unit and the flexible circuit board.
[0016] In one embodiment, one end of the second body of the flexible circuit board extends through between the driving components, and the light-emitting component is disposed at one end of the second body.
[0017] In one embodiment, the light emitting component includes a first light emitting group and a second light emitting group, the first light emitting group and the second light emitting group are electrically connected to the second circuit area of the second body, and the first light emitting group and the second light emitting group are arranged outside the electronic paper display unit.
[0018] In one embodiment, there are two second bodies, the two second bodies extend inward from the first body, one end of the two second bodies extends through two sides of the driving component respectively, and the light-emitting component is disposed at one end of the two second bodies.
[0019] In one embodiment, the first body is in the shape of a plate, and the second body is in the shape of a rectangle.
[0020] In one embodiment, the electronic paper display unit has an electronic paper ink layer and a protective film, the electronic paper ink layer is disposed on the TFT substrate, the protective film is disposed on the electronic paper ink layer, and the light guide plate is disposed on the protective film.
[0021] In one embodiment, the light-emitting assembly includes a light-emitting bar and light-emitting elements evenly arranged on the light-emitting bar.
[0022] In an embodiment of the present application, the circuit for driving the TFT substrate and the circuit for driving the light-emitting component are integrated on the same flexible circuit board, a first circuit area and a second circuit area are formed on the flexible circuit board, the first circuit area of the flexible circuit board is electrically connected to the TFT substrate, and the second circuit area of the flexible circuit board is electrically connected to the light-emitting component, so that the light-emitting structure can be simplified. In addition, since the second circuit area is added to the flexible circuit board, the second circuit area is used to connect and control the light-emitting component, and therefore, only the step of placing the light-emitting component is added to the serial process of the electronic paper module process, and the serial process of the electronic paper module process can be realized. The present application realizes the integrated design of the circuit for driving the electronic paper module and the circuit for driving the light-emitting component, reducing the difficulty of manufacturing the electronic paper display device. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:
[0024] Figure 1 is a schematic diagram of an electronic paper display device according to a first embodiment of the present application;
[0025] Figure 2 is a schematic top view of an electronic paper display device according to a first embodiment of the present application;
[0026] Figure 3 is a schematic diagram of an electronic paper display device according to a second embodiment of the present application;
[0027] Figure 4 is a schematic top view of an electronic paper display device according to a third embodiment of the present application;
[0028] Figure 5 is a schematic top view of an electronic paper display device according to a fourth embodiment of the present application;
[0029] Figure 6 4 is a schematic top view of an electronic paper display device according to a fifth embodiment of the present application.
[0030] The following description is provided in conjunction with the accompanying drawings: 1: electronic paper display device; 2: electronic paper module; 21: TFT substrate; 22: electronic paper display unit; 221: electronic paper ink layer; 222: protective film; 23: light guide plate; 231: accommodating groove; 2311: groove wall; 24: driving component; 241: driving IC; 3: flexible circuit board; 301: first surface; 302: second surface; 31: first circuit area; 32: second circuit area; 33: connecting area; 34: first body; 35: second body; 4: light-emitting component; 41: light-emitting bar; 42: light-emitting part; 401: first light-emitting group; 402: second light-emitting group; 5: first waterproof glue; 6: second waterproof glue. DETAILED DESCRIPTION
[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0032] In the description of the present application, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0033] In addition, the terms “first”, “second”, etc. used in this document do not specifically refer to an order or sequence, nor are they used to limit this application. They are merely used to distinguish components or operations described with the same technical terms.
[0034] See also Figure 1, which is a schematic diagram of an electronic paper display device of the first embodiment of the present application; as shown in the figure, the electronic paper display device 1 includes an electronic paper module 2, a flexible circuit board 3 and a light-emitting component 4. The electronic paper module 2 has a TFT substrate 21, an electronic paper display unit 22 and a light guide plate 23. The electronic paper display unit 22 is arranged on the TFT substrate 21, and the light guide plate 23 is arranged on the electronic paper display unit 22. The flexible circuit board 3 is arranged on one side of the electronic paper module 2. The flexible circuit board 3 includes a first circuit area 31 and a second circuit area 32. The first circuit area 31 is electrically connected to the TFT substrate 21. The first circuit area 31 has a circuit for driving the TFT substrate 21, and the circuit can enable the TFT substrate 21 to transmit signals with the electronic paper ink layer 221. The light-emitting component 4 is located on one side of the electronic paper display unit 22. The light-emitting component 4 is electrically connected to the second circuit area 32. The second circuit area 32 has a circuit for driving the light-emitting component 4, and the circuit can provide current to the light-emitting component 4, so that the light-emitting component 4 provides a display light source for the electronic paper display unit 22. The light emitting surface of the light emitting assembly 4 faces the light guide plate 23 .
[0035] In this embodiment, the flexible circuit board 3 further includes a connection area 33, and the connection area 33 is located between the first circuit area 31 and the second circuit area 32. The flexible circuit board 3 has a first surface 301 and a second surface 302 opposite to the first surface 301. Figure 1 As shown, the first surface 301 is the upper surface of the flexible circuit board 3, and the second surface 302 is the lower surface of the flexible circuit board 3. The first circuit area 31 and the second circuit area 32 are located on the first surface 301, and the connection area 33 is located on the second surface 302. The connection area 33 of the flexible circuit board 3 is fixed on the TFT substrate 21. The connection area 33 has a plug-in terminal, and the TFT substrate 21 has a corresponding plug-in interface. The connection area 33 of the flexible circuit board 3 is fixed on the TFT substrate 21 by plugging the plug-in terminal into the plug-in interface.
[0036] Please also read Figure 2, which is a top view schematic diagram of the electronic paper display device of the first embodiment of the present application; as shown in the figure, the flexible circuit board 3 has a first body 34 and a second body 35. The second body 35 extends inward from the first body 34. In this embodiment, the second body 35 and the first body 34 are an integrated structure, the upper surface of the second body 35 and the first body 34 is a first surface 301, and the lower surface of the second body 35 and the first body 34 is a second surface 302. The first circuit area 31 and the connection area 33 are located in the first body 34. The second circuit area 32 is located in the second body 35. In this embodiment, the light-emitting component 4 is arranged on the second body 35, or the light-emitting component 4 is arranged on the side of the second body 35 away from the first body 34. In other words, the light-emitting component 4 and the flexible circuit board 3 are connected to each other. The light-emitting surface of the light-emitting component 4 is attached to the lower surface of the light guide plate 23. The light-emitting component 4 includes a light-emitting bar 41 and light-emitting components 42 evenly arranged on the light-emitting bar 41. The light-emitting bar 41 is an LED light strip, and the light-emitting components 42 are multiple LED lamp beads.
[0037] In this embodiment, the electronic paper module 2 also has a driving component 24. The driving component 24 is arranged on the TFT substrate 21, and the driving component 24 is located between the electronic paper display unit 22 and the flexible circuit board 3. The driving component 24 has two driving ICs 241, and the two driving ICs 241 are arranged at intervals on one side of the electronic paper display unit 22, and are located between the electronic paper display unit 22 and the flexible circuit board 3. The driving IC 241 can perform display control of the screen for the electronic paper display unit 22 and the light-emitting component 4. Among them, the electronic paper display unit 22 has an electronic paper ink layer 221 and a protective film 222, the electronic paper ink layer 221 is arranged on the TFT substrate 21, the protective film 222 is arranged on the electronic paper ink layer 221, and the light guide plate 23 is arranged on the protective film 222. The TFT substrate 21 and the electronic paper ink layer 221 transmit signals to drive the electronic paper ink layer 221 to display the desired pattern. The light guide plate 23 converts the light source of the light emitting component 4 into a surface light source, and provides a display light source for the electronic paper ink layer 221 , so that the electronic paper ink layer 221 has sufficient brightness to display content.
[0038] The electronic paper display device 1 of this embodiment integrates the circuit for driving the TFT substrate 21 and the circuit for driving the light-emitting component 4 on the same flexible circuit board 3, and forms a first circuit area 31 and a second circuit area 32 on the flexible circuit board 3. The first circuit area 31 of the flexible circuit board 3 is electrically connected to the TFT substrate 21, and the second circuit area 32 of the flexible circuit board 3 is electrically connected to the light-emitting component 4, so that the light-emitting structure can be simplified. In addition, since the second circuit area 32 is added to the flexible circuit board 3, the second circuit area 32 is used to connect and control the light-emitting component 4, and therefore, only the step of placing the light-emitting component 4 is added to the serial process of the electronic paper module 2 process, that is, the serial process of the electronic paper module 2 process can be realized. The electronic paper display device 1 of the present application can realize the integrated design of the circuit for driving the electronic paper module 2 and the circuit for driving the light-emitting component 4, which can avoid the serial connection behavior of the input ports of the two sets of circuits and reduce the difficulty of manufacturing the electronic paper display device.
[0039] See also Figure 1 As shown, the electronic paper display device 1 further includes a first waterproof glue 5. The first waterproof glue 5 is disposed between the TFT substrate 21 and the second surface 302 of the flexible circuit board 3, and the first waterproof glue 5 corresponds to the second circuit area 32. In other words, the first waterproof glue 5 and the second circuit area 32 are respectively located on opposite sides of the flexible circuit board 3. Furthermore, the second surface 302 of the second body 35 of the flexible circuit board 3 is bonded and fixed to the TFT substrate 21 by the first waterproof glue 5, so that the corresponding area of the flexible circuit board 3 is tightly combined with the TFT substrate 21, thereby avoiding the problem of deviation of the flexible circuit board 3 due to unstable bonding. Furthermore, the electronic paper display device 1 further includes a second waterproof glue 6. The second circuit area 32 of the flexible circuit board 3 and the light guide plate 23 are bonded to each other by the second waterproof glue 6. In other words, the second waterproof glue 6 is disposed between the second circuit area 32 of the flexible circuit board 3 and the light guide plate 23. The light-emitting component 4 is located between the second waterproof glue 6 and the electronic paper display unit 22. This can enhance the close connection between the second body 35 of the flexible circuit board 3 and the light guide plate 23 to increase the stability of the flexible circuit board 3 and avoid deviation. On the other hand, the light-emitting component 4 can also be sealed.
[0040] See also Figure 3, which is a schematic diagram of an electronic paper display device of the second embodiment of the present application; as shown in the figure, the difference between the electronic paper display device 1 of this embodiment and the above-mentioned first embodiment lies in the structure of the light guide plate 23. The light guide plate 23 of this embodiment has a receiving groove 231, and the light-emitting component 4 is located in the receiving groove 231. The groove wall 2311 on one side of the receiving groove 231 adjacent to the electronic paper display unit 22 is the light incident surface of the light guide plate 23, and the light-emitting surface of the light-emitting component 4 faces the light incident surface of the light guide plate 23. The second body 35 covers the notch of the receiving groove 231 to seal the light-emitting component 4, so that the light of the light-emitting component 4 can be concentrated and emitted toward the light guide plate 23. The second body 35 of this embodiment and the light guide plate 23 are bonded to each other by a second waterproof glue 6.
[0041] Furthermore, the groove wall 2311 of the light guide plate 23 adjacent to the side of the electronic paper display unit 22 has a microstructure surface, which is the light incident surface, and the light of the light emitting component 4 is incident into the light guide plate 23 from the microstructure surface. The microstructure surface is a convex surface, which has the function of converging light and improving the utilization rate of the light source. The groove 231 of the light guide plate 23 has a reinforcement structure on the side away from the electronic paper display unit 22, which refers to the use of the second waterproof glue 6 to bond and reinforce between the light guide plate 23 and the second body 35 to improve the installation stability of the light guide plate 23 and the second body 35.
[0042] See also Figure 4 , which is a top view schematic diagram of the electronic paper display device of the third embodiment of the present application; as shown in the figure, the difference between the electronic paper display device 1 of this embodiment and the above-mentioned first embodiment lies in the structural combination of the flexible circuit board 3 and the light-emitting component 4. One end of the second body 35 of the flexible circuit board 3 of this embodiment extends through the driving component 24, and the light-emitting component 4 is arranged at one end of the second body 35. In other words, the light-emitting component 4 is located between the driving component 24 and the electronic paper display unit 22, and one end of the second body 35 extends through the two driving ICs 241 and is electrically connected to the light-emitting component 4, so that the light-emitting component 4 can be closer to the electronic paper display unit 22. When the light of the light-emitting component 4 is transmitted to the surface of the electronic paper display unit 22 through the light guide plate, the path of the light is shorter, the loss of the light is smaller, and the light supply to the electronic paper display unit 22 can be better. The first body 34 is flat, and the second body 35 is rectangular.
[0043] Please also read Figure 5, which is a top view schematic diagram of the electronic paper display device of the fourth embodiment of the present application; as shown in the figure, the difference between the electronic paper display device 1 of this embodiment and the third embodiment mentioned above lies in the structure of the flexible circuit board 3. In this embodiment, the second body 35 of the flexible circuit board 3 has two. The two second bodies 35 extend inward from the first body 34, and one end of the two second bodies 35 extends through the two sides of the driving component 24 respectively, and the light-emitting component 4 is arranged at one end of the two second bodies 35. The arrangement of the second body 35 of the above-mentioned flexible circuit board 3 can be adjusted according to the needs of the user.
[0044] See also Figure 6 , which is a top view schematic diagram of the electronic paper display device of the fifth embodiment of the present application; as shown in the figure, the difference between the electronic paper display device 1 of this embodiment and the third embodiment mentioned above lies in the structure of the light emitting component 4. The light emitting component 4 of this embodiment includes a first light emitting group 401 and a second light emitting group 402. The first light emitting group 401 and the second light emitting group 402 are electrically connected to the second circuit area 32 of the second body 35. The first light emitting group 401 and the second light emitting group 402 are arranged on the outside of the electronic paper module 2, as shown in FIG. Figure 6 As shown, the first light-emitting group 401 and the second light-emitting group 402 are arranged orthogonally on both sides of the right angle side of the electronic paper display unit 22. By adding the second light-emitting group 402 outside the electronic paper display unit 22, variable lighting of a large-size display can be achieved. The number and arrangement of the above-mentioned light-emitting components 4 can be adjusted according to the needs of the user.
[0045] In summary, the present application provides an electronic paper display device, which integrates the circuit for driving the TFT substrate and the circuit for driving the light-emitting component on the same flexible circuit board, forms a first circuit area and a second circuit area on the flexible circuit board, and electrically connects the first circuit area of the flexible circuit board to the TFT substrate, and the second circuit area of the flexible circuit board to the light-emitting component, so that the light-emitting structure can be simplified. In addition, since the flexible circuit board is provided with a second circuit area, the second circuit area is used to connect and control the light-emitting component, and therefore, only the step of placing the light-emitting component needs to be added in the serial process of the electronic paper module process, and the serial process of the electronic paper module process can be realized. The present application realizes the integrated design of the circuit for driving the electronic paper module and the circuit for driving the light-emitting component, which reduces the difficulty of manufacturing the electronic paper display device.
[0046] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.
[0047] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.
Claims
1. An electronic paper display device, characterized in that: include: An electronic paper module, comprising a TFT substrate, an electronic paper display unit and a light guide plate, wherein the electronic paper display unit is arranged on the TFT substrate, and the light guide plate is arranged on the electronic paper display unit; A flexible circuit board is arranged on one side of the electronic paper module, the flexible circuit board comprises a first circuit area and a second circuit area, and the first circuit area is electrically connected to the TFT substrate; A light emitting component is located at one side of the electronic paper display unit, the light emitting component is electrically connected to the second circuit area, and the light emitting surface of the light emitting component faces the light guide plate.
2. The electronic paper display device according to claim 1, characterized in that: The flexible circuit board further includes a connection area, and the connection area is located between the first circuit area and the second circuit area.
3. The electronic paper display device according to claim 2, characterized in that: The flexible circuit board has a first surface and a second surface opposite to the first surface. The first circuit area and the second circuit area are located on the first surface. The connection area is located on the second surface. The connection area of the flexible circuit board is fixed on the TFT substrate.
4. The electronic paper display device according to claim 3, characterized in that: Also includes: A first waterproof glue is disposed between the TFT substrate and the second surface of the flexible circuit board, and the first waterproof glue corresponds to the second circuit area.
5. The electronic paper display device according to claim 3, characterized in that: Also includes: A second waterproof adhesive, wherein the second circuit area of the flexible circuit board and the light guide plate are bonded to each other through the second waterproof adhesive.
6. The electronic paper display device according to claim 2, characterized in that: The flexible circuit board has a first body and a second body, the second body extends inward from the first body, the first circuit area and the connection area are located in the first body, and the second circuit area is located in the second body.
7. The electronic paper display device according to claim 6, characterized in that: The light emitting component is arranged on the second body, the light guide plate has a receiving groove, the light emitting component is located in the receiving groove, and the second body covers the notch of the receiving groove.
8. The electronic paper display device according to claim 7, characterized in that: The groove wall of the accommodating groove of the light guide plate adjacent to the electronic paper display unit has a microstructure surface, and the light of the light emitting component is incident into the light guide plate through the microstructure surface.
9. The electronic paper display device according to claim 7, characterized in that: The accommodating groove of the light guide plate has a reinforcing structure on one side away from the electronic paper display unit.
10. The electronic paper display device according to claim 6, characterized in that: The electronic paper module further comprises a driving component, wherein the driving component is arranged on the TFT substrate and is located between the electronic paper display unit and the flexible circuit board.
11. The electronic paper display device according to claim 10, characterized in that: One end of the second body of the flexible circuit board extends through between the driving components, and the light emitting component is arranged at one end of the second body.
12. The electronic paper display device according to claim 11, characterized in that: The light-emitting component includes a first light-emitting group and a second light-emitting group, the first light-emitting group and the second light-emitting group are electrically connected to the second circuit area of the second body, and the first light-emitting group and the second light-emitting group are arranged outside the electronic paper display unit.
13. The electronic paper display device according to claim 10, characterized in that: The second bodies have two parts, the two second bodies extend inward from the first body, one end of the two second bodies extend through two sides of the driving component respectively, and the light emitting component is disposed at one end of the two second bodies.
14. The electronic paper display device according to claim 6, characterized in that: The first body is in a flat plate shape, and the second body is in a rectangular shape.
15. The electronic paper display device according to claim 1, characterized in that: The electronic paper display unit comprises an electronic paper ink layer and a protective film, wherein the electronic paper ink layer is arranged on the TFT substrate, the protective film is arranged on the electronic paper ink layer, and the light guide plate is arranged on the protective film.
16. The electronic paper display device according to claim 1, characterized in that: The light-emitting assembly comprises a light-emitting bar and light-emitting elements evenly arranged on the light-emitting bar.