Electronic paper display screen and arrangement method of heating device of electronic paper display screen

Abstract

The invention relates to the technical field of display control technology, and discloses an electronic paper display screen and an arrangement method of a heating device thereof, the electronic paper display screen comprises a display substrate, a display panel, and a power line, a first resistance wire and a second resistance wire laid on the display substrate, and a first heating wire is parallel to a second heating wire; the first resistance wire is connected in series with one end or two ends of the first heating wire, and the first resistance wire, the first heating wire and the power line are conducted to form a first path; the second resistance wire is connected in series with the end part of the second heating wire, and the second resistance wire, the second heating wire and the power line are conducted to form a second path; the length of the first resistance wire is smaller than that of the second resistance wire or the width of the first resistance wire is larger than that of the second resistance wire, so that the equivalent resistance of the first path is equal to that of the second path. The path resistances of different heating wires are equal by adjusting the lengths and widths of the resistance wires, so that uniform heating is realized, and the low-temperature performance is improved.

Description

Technical Field

[0001] This invention relates to the technical field of display control technology, and in particular to an electronic paper display screen and a method for arranging its heating device. Background Technology

[0002] As electronic paper display technology continues to advance, the performance requirements for electronic paper display devices are becoming increasingly stringent. Even in low-temperature environments, electronic paper display devices are required to quickly reach normal operating status after startup, meaning they must possess rapid low-temperature response capabilities. Currently, this rapid low-temperature response is often achieved by adding heating electrodes to the display device; these heating electrodes are typically located within the display area.

[0003] However, existing heating electrodes and their arrangement, simply setting up several parallel heating electrodes, can only achieve a uniform heating effect for rectangular screens. For irregularly shaped screens (such as circular screens), the parallel lines have a significant difference in path length between the center and the edges. For heating wires, different lengths mean different resistances, and according to Joule's law, the corresponding heating power is also different. This results in huge differences in heating effect, causing large temperature differences in different parts of the display area, which can easily lead to display defects in electronic paper display panels, seriously affecting display quality and user experience.

[0004] Therefore, how to achieve uniform heating for screens of different shapes has become a technical problem that urgently needs to be solved. Summary of the Invention

[0005] The technical problem to be solved by this invention is: how to achieve uniform heating for screens of different shapes.

[0006] To address the aforementioned technical problems, the present invention provides a method for arranging an electronic paper display screen and its heating device.

[0007] In a first aspect, the present invention provides an electronic paper display screen, including a display substrate, a display panel disposed on the display substrate, a power line, a first resistance line, and a second resistance line disposed on the display substrate, the power line being disposed around the display panel, and a first heating wire and a second heating wire being disposed between the display panel and the display substrate, the first heating wire being parallel to the second heating wire; the first resistance line being connected in series at one or both ends of the first heating wire, the first resistance line, the first heating wire being conductive with the power line to form a first path; the second resistance line being connected in series at one or more ends of the second heating wire, the second resistance line, the second heating wire being conductive with the power line to form a second path; the length of the first heating wire being greater than the length of the second heating wire, the length of the first resistance line being less than the length of the second resistance line, or the width of the first resistance line being greater than the width of the second resistance line, such that the equivalent resistance of the first path is equal to the equivalent resistance of the second path.

[0008] In one embodiment, the second heating wire includes a first sub-heating wire and a second sub-heating wire, the first sub-heating wire and the second sub-heating wire are parallel, and the first sub-heating wire and the second sub-heating wire are connected in series; the length of the second sub-heating wire is less than the length of the first sub-heating wire, and the lengths of both the first sub-heating wire and the second sub-heating wire are less than the length of the first heating wire.

[0009] In one embodiment, the width of the first resistance wire and the width of the second resistance wire are equal, and the second resistance wire is wound with a plurality of bow-shaped bends, the bow-shaped bends being of a preset size.

[0010] In one embodiment, the number of bow-shaped bends in the second resistance wire at the second sub-heating wire is greater than the number of bow-shaped bends in the second resistance wire at the first sub-heating wire.

[0011] In one embodiment, one electrode of the power cord is located at the bottom of the display panel, and the other electrode of the power cord is located at the top of the display panel.

[0012] In one embodiment, both the first and second resistance wires include a first segment connected to the positive terminal of the power line and a second segment connected to the negative terminal of the power line; the electronic paper display screen is a symmetrical display screen, the width of the first segment is equal to the width of the second segment, the length of the first segment is equal to the length of the second segment, and both are calculated using the following formula:

[0013]

[0014] In Formula 1, L i L is the length of the first segment. k R is the length of the second segment. max Let ρ be the equivalent resistance of the first or second path, and L be the resistivity. j W is the length of the heating wire through which the first or second resistance wire is conducting. j W is the width of the heating wire. i This is the width of the first segment.

[0015] In one embodiment, both the first resistance wire and the second resistance wire include a first segment connected to the positive terminal of the power line and a second segment connected to the negative terminal of the power line.

[0016] The electronic paper display is an asymmetrical display. Given the width and length of the first segment, the length and width of the second segment are related by the following formula:

[0017]

[0018] In Formula 2, L k R is the length of the second segment. max Let ρ be the equivalent resistance of the first or second path, and L be the resistivity. jW is the length of the heating wire through which the first or second resistance wire is conducting. j L is the width of the heating wire. i W is the length of the first segment. i W is the width of the first segment. k This is the width of the second segment.

[0019] A second aspect of the present invention provides a method for arranging a heating device, the method being applied to an electronic paper display screen as provided in the first aspect of the present invention, the method comprising: S1, laying a first heating wire and a second heating wire between a display panel and a display substrate, such that the first heating wire and the second heating wire are parallel; S2, wrapping a power line around the display panel and laying it on the display substrate; S3, selecting a first resistance wire and a second resistance wire, wherein the length of the first resistance wire is less than the length of the second resistance wire or the width of the first resistance wire is greater than the width of the second resistance wire, and the equivalent resistance of the first heating wire and the first resistance wire is equal to the equivalent resistance of the second heating wire and the second resistance wire; S4, laying the first resistance wire and the second resistance wire on the display substrate, connecting the first resistance wire to the power line and the first heating wire respectively, and connecting the second resistance wire to the power line and the second heating wire respectively.

[0020] In one embodiment, before step S4, the arrangement method further includes: S31, winding the second resistance wire to form a plurality of bow-shaped bends, wherein the bow-shaped bends are of a preset size.

[0021] In one embodiment, both the first resistance wire and the second resistance wire include a first segment connected to the positive terminal of the power supply line and a second segment connected to the negative terminal of the power supply line; step S3 includes: S301, setting the length and width of the first segment; S302, calculating the length and width of the second segment using the following formula:

[0022]

[0023] In Formula 2, L k R is the length of the second segment. max Let ρ be the equivalent resistance of the first or second path, and L be the resistivity. j W is the length of the heating wire through which the first or second resistance wire is conducting. j L is the width of the heating wire. i W is the length of the first segment. i W is the width of the first segment. k This is the width of the second segment.

[0024] The arrangement method of the electronic paper display screen and its heating device according to an embodiment of the present invention has the following advantages compared with the prior art:

[0025] The electronic paper display screen of this invention achieves equal equivalent resistance across the paths containing heating wires of varying lengths by connecting resistance wires of different specifications in series with heating wires of different lengths. According to Joule's law, paths with equal equivalent resistance will generate the same amount of heat under the same energizing time, thus ensuring a consistent heating rate across all areas of the display panel and effectively solving the temperature difference problem between the edges and center of irregularly shaped screens. Uniform heating allows the electronic paper display panel to quickly reach its normal operating temperature even in low-temperature environments, avoiding response delays or display abnormalities caused by insufficient localized temperatures, and significantly improving startup speed and display stability in low-temperature conditions.

[0026] Meanwhile, due to the matching design of heating wire and resistance wire, there are multiple combinations of the two parameters of length and width. Therefore, it can be modified to adapt to various shapes of display screens, breaking through the limitation of traditional parallel electrodes that are only suitable for rectangular screens. It can be flexibly adapted to various irregularly shaped screens such as round and curved screens. Attached Figure Description

[0027] Figure 1 This is a schematic diagram illustrating the structure of an electronic paper display screen, as exemplarily shown in an embodiment of the present invention.

[0028] Figure 2 This is a schematic diagram illustrating the structure of a series of sub-heating wires in an electronic paper display screen, as exemplarily shown in an embodiment of the present invention.

[0029] Figure 3 This is a schematic diagram illustrating the structure of the bow-shaped bend of an electronic paper display screen, as exemplarily shown in an embodiment of the present invention.

[0030] Figure 4 This is a schematic diagram illustrating the structure of a composite feature of an electronic paper display screen, as exemplarily shown in an embodiment of the present invention.

[0031] Figure 5 This is a schematic flowchart illustrating an exemplary embodiment of the present invention of a heating device arrangement method.

[0032] Figure label:

[0033] 1. Electronic paper display screen; 11. Display substrate; 12. Display panel; 13. Power cord; 131. Electrode; 141. First resistance wire; 142. Second resistance wire; 151. First heating wire; 152. Second heating wire; 1421. First segment; 1422. Second segment; 1423. Bow-shaped bend; 1521. First sub-heating wire; 1522. Second sub-heating wire. Detailed Implementation

[0034] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0035] In the description of this invention, it should be understood that the terms "first," "second," etc., in the specification, claims, and accompanying drawings are intended to distinguish similar objects and are not intended to describe a specific structure. It should be understood that such terms are interchangeable where appropriate so that embodiments of the invention can be implemented in structures other than those illustrated or described. Furthermore, "comprising," "having," and any variations thereof are intended to cover non-exclusive inclusions. For example, a product or device comprising a series of components or units is not necessarily limited to those explicitly listed, but may also include other components or units not explicitly listed but inherent to these products or devices.

[0036] As electronic paper display technology continues to advance, the performance requirements for electronic paper display devices are becoming increasingly stringent. Even in low-temperature environments, electronic paper display devices are required to quickly reach normal operating status after startup, meaning they must possess rapid low-temperature response capabilities. Currently, this rapid low-temperature response is often achieved by adding heating electrodes to the display device; these heating electrodes are typically located within the display area.

[0037] However, existing heating electrodes and their arrangement, simply setting up several parallel heating electrodes, can only achieve a uniform heating effect for rectangular screens. For irregularly shaped screens (such as circular screens), the parallel lines have a large difference in path length between the center and the edges of the irregularly shaped screen, resulting in huge differences in heating effect. This causes large temperature differences in different parts of the display area, which can easily lead to display problems in electronic paper display panels, seriously affecting the display effect and user experience.

[0038] Based on this, such as Figure 1 As shown in the preferred embodiment of the present invention, an electronic paper display screen 1 may include a display substrate 11, a display panel 12 disposed on the display substrate 11, a power line 13, a first resistance line 141 and a second resistance line 142 disposed on the display substrate 11, the power line 13 being disposed around the display panel 12, and a first heating wire 151 and a second heating wire 152 being disposed between the display panel 12 and the display substrate 11, the first heating wire 151 and the second heating wire 152 being parallel.

[0039] The first resistance wire 141 is connected in series at one or both ends of the first heating wire 151. The first resistance wire 141, the first heating wire 151 and the power supply wire 13 are connected to form a first circuit.

[0040] The second resistance wire 142 is connected in series with one or more ends of the second heating wire 152. The second resistance wire 142, the second heating wire 152 and the power supply wire 13 are connected to form a second circuit.

[0041] The length of the first heating wire 151 is greater than the length of the second heating wire 152, and the length of the first resistance wire 141 is less than the length of the second resistance wire 142 or the width of the first resistance wire 141 is greater than the width of the second resistance wire 142, so that the equivalent resistance of the first path is equal to the equivalent resistance of the second path.

[0042] It is understood that the first heating wire 151 and the second heating wire 152 in this invention are only representative names and can refer to any two heating wires in the electronic paper display screen 1 that meet the length relationship. If two or more heating wires are used, and two of them can meet the above-mentioned structural features in this invention, then they fall within the protection scope of this invention.

[0043] By using the above solution, the present invention addresses the problem of uneven heating caused by the difference in the length of heating wires at different positions in irregularly shaped screens (such as circular screens). By adjusting the length or width of the series resistance wires, the equivalent resistance of the paths containing heating wires of different lengths is made equal.

[0044] According to Joule's law (Q = I) 2 When the equivalent resistance (R) of different paths is the same under the same power-on time (t), the current (I) flowing through them is also the same. Therefore, different paths will generate the same heat (Q), thereby ensuring that the heating rate of each area of ​​the display panel 12 is consistent, effectively solving the temperature difference problem between the edge and the middle of the irregular screen.

[0045] This improvement in heating uniformity allows the electronic paper display panel 12 to quickly reach its normal operating temperature in low-temperature environments, avoiding response delays or display abnormalities caused by insufficient local temperatures, and significantly improving startup speed and display stability in low-temperature environments.

[0046] The length and width of the resistance wire can be adjusted to present a variety of combinations. Whether it is a regular rectangular screen or an irregularly shaped screen such as a circle or an ellipse, the length and width of the resistance wire can be adjusted to uniformly adapt to the heating capacity of different channels, guided by the principle of equal equivalent resistance.

[0047] Not only that, such as Figure 2As shown, in one embodiment of the present invention, the second heating wire 152 may include a first sub-heating wire 1521 and a second sub-heating wire 1522, which are parallel and connected in series. The length of the second sub-heating wire 1522 is less than the length of the first sub-heating wire 1521, and both the lengths of the first and second sub-heating wires are less than the length of the first heating wire 151.

[0048] In this embodiment, when it is difficult to adjust the parameters of the second resistance wire alone for the first heating wire 151 and the second heating wire 152, which have a large difference in length, the first heating wire 151 is divided into two heating wires (also arranged in parallel), namely the first sub-heating wire 1521 and the second sub-heating wire 1522. The first sub-heating wire 1521 and the second sub-heating wire 1522 are connected in series so that the length of the second heating wire 152 is closer to the length of the first heating wire 151. This reduces the difficulty of adjusting the second resistance wire and makes the equivalent resistance of the second path more easily adaptable to the equivalent resistance of the first path.

[0049] In addition, considering the space occupied by some display screens, such as Figure 3 As shown, in one embodiment of the present invention, the width of the first resistance wire 141 can be equal to the width of the second resistance wire 142, and the second resistance wire 142 is wound with a plurality of bow-shaped bends 1423, the bow-shaped bends 1423 being of a preset size.

[0050] It is understood that in this invention, the scheme of connecting the first sub-heating wire 1521 and the second sub-heating wire 1522 in series and the scheme of the bow-shaped bending portion 1423 can be used independently or in combination, such as... Figure 3 As shown, the upper part uses an arc-shaped bend 1423, while the lower part uses a design where the first sub-heating wire 1521 and the second sub-heating wire 1522 are connected in series. For example... Figure 4 At any time, the upper part adopts both the bow-shaped bend 1423 and the first sub-heating wire 1521 and the second sub-heating wire 1522 connected in series, and the lower part is similar. Various wiring configurations can be formed. By adjusting the appropriate length and width, multiple paths with equal equivalent resistance can be created, thereby achieving uniform heating.

[0051] Since the width of the second resistance wire 142 is equal to that of the first resistance wire 141, but it has several additional bow-shaped bends 1423, it is equivalent to increasing the length of the second resistance wire 142. Given that the length of the first heating wire 151 is greater than the length of the second heating wire 152, increasing the length of the second resistance wire 142 facilitates the matching of the equivalent resistance of the first and second paths. This allows for maximizing the adjustment range of the length of the second resistance wire 142 within a limited space, better adapting to the heating requirements of irregularly shaped screens.

[0052] Based on this, in another embodiment of the present invention, the number of bow-shaped bends 1423 of the second resistance wire 142 at the second sub-heating wire 1522 is greater than the number of bow-shaped bends 1423 of the second resistance wire 142 at the first sub-heating wire 1521.

[0053] In the above embodiment, the first resistance wire 141 may also be wound with an arc-shaped bend 1423. By adjusting the number of arc-shaped bends 1423 of the first resistance wire 141 and the number of arc-shaped bends 1423 of the second resistance wire 142, the equivalent resistance of the second path and the equivalent resistance of the first path can be adjusted to be equal, so as to achieve uniform heating of the display area at the first heating wire 151 and the second heating wire 152.

[0054] Understandably, the second resistance wire 142 is connected to one or more ends of the second heating wire 152. For example, when one end of the first heating wire 151 is directly connected to the power line 13, the other end is connected to the second resistance wire 142. Alternatively, when the second heating wire 152 is divided into a first sub-heating wire 1521 and a second sub-heating wire 1522, it presents three ends: the end of the first sub-heating wire 1521 near the power line 13, the middle end where the first sub-heating wire 1521 and the second sub-heating wire 1522 connect, and the end of the second sub-heating wire 1522 near the power line 13. In this case, the second resistance wire can be divided into multiple parts and connected to multiple ends.

[0055] Furthermore, in order to further reduce the impact on the equivalent resistance of the circuit, in one embodiment of the invention, one electrode 131 of the power line 13 is located at the bottom of the display panel 12, and the other electrode 131 of the power line 13 is located at the top of the display panel 12.

[0056] With this design, the path length from any channel to the positive and negative terminals is always equal, thereby reducing the impact of the power line 13's own resistance on heating uniformity.

[0057] In one embodiment, such as Figure 4As shown, both the first resistance wire 141 and the second resistance wire 142 include a first segment 1421 connected to the positive terminal of the power supply line 13 and a second segment 1422 connected to the negative terminal of the power supply line 13. The electronic paper display screen 1 is a symmetrical display screen. The width of the first segment 1421 is equal to the width of the second segment 1422, and the length of the first segment 1421 is equal to the length of the second segment 1422, both calculated using the following formula:

[0058]

[0059] In Formula 1, L i L is the length of the first segment 1421. k R is the length of the second segment 1422. max Let ρ be the equivalent resistance of the first or second path, and L be the resistivity. j W is the length of the heating wire through which the first resistance wire 141 or the second resistance wire 142 is connected. j W is the width of the heating wire. i The width of the first segment 1421.

[0060] For symmetrical displays (such as circular or regular polygonal displays), the resistance wire is divided into two symmetrical segments with identical positive and negative poles, ensuring the symmetry of the current path. This design matches the geometric symmetry of the screen, structurally avoiding local current differences caused by asymmetrical resistance wire layout, and further improving the heating consistency of different areas of the symmetrical screen.

[0061] Formula 1 quantifies parameters such as resistivity, heating wire length and width, and resistance wire width, directly calculating the length of the target resistance wire to precisely control the equivalent resistance of the first and second paths within a preset R value. max Compared to empirical adjustments, this quantitative design significantly reduces resistance matching errors, ensuring that heating wires of different lengths generate equal amounts of heat, and theoretically eliminating uneven heating caused by calculation deviations.

[0062] In one embodiment, such as Figures 1-4 As shown in any embodiment, the first resistance line 141 and the second resistance line 142 each include a first segment 1421 connected to the positive terminal of the power line 13 and a second segment 1422 connected to the negative terminal of the power line 13.

[0063] The electronic paper display 1 is an asymmetrical display. Given the width and length of the first segment 1421, the length and width of the second segment 1422 are related by the following formula:

[0064]

[0065] In Formula 2, L k R is the length of the second segment 1422. max Let ρ be the equivalent resistance of the first or second path, and L be the resistivity. j W is the length of the heating wire through which the first resistance wire 141 or the second resistance wire 142 is connected. j L is the width of the heating wire. i W is the length of the first segment 1421; i W is the width of the first segment 1421. k This is the width of the second segment, 1422.

[0066] To address the geometric characteristics of asymmetrical displays (such as irregularly shaped screens and asymmetrical polygonal screens), the parameter binding between the two segments of the resistance wire (positive and negative segments) is removed, allowing the first segment 1421 and the second segment 1422 to use different combinations of length and width. This flexible design can adapt to the asymmetrical layout of various areas of the screen, avoiding the local resistance imbalance problem that may occur in asymmetrical screens with symmetrical designs, and structurally ensuring the heating uniformity of the asymmetrical screen.

[0067] The quantitative calculation method in Formula 2 breaks through the parameter limitations of symmetrical design. It can flexibly adjust the resistance line parameters according to the heating needs of each area of ​​the asymmetrical screen, ensuring accurate matching of the equivalent resistance of different paths, and fundamentally solving the problem of uneven heat distribution caused by asymmetrical layout.

[0068] Correspondingly, such as Figure 5 As shown, the present invention also provides a method for arranging a heating device, the method being applied to an electronic paper display screen 1 as provided in the first aspect of the present invention, the method comprising:

[0069] S1. Lay the first heating wire 151 and the second heating wire 152 between the display panel 12 and the display substrate 11, so that the first heating wire 151 and the second heating wire 152 are parallel.

[0070] S2. Wrap the power cord 13 around the display panel 12 and lay it on the display substrate 11.

[0071] S3. Select a first resistance wire 141 and a second resistance wire 142, wherein the length of the first resistance wire 141 is less than the length of the second resistance wire 142 or the width of the first resistance wire 141 is greater than the width of the second resistance wire 142, and the equivalent resistance of the first heating wire 151 and the first resistance wire 141 is equal to the equivalent resistance of the second heating wire 152 and the second resistance wire 142.

[0072] S4. Lay the first resistance wire 141 and the second resistance wire 142 on the display substrate 11, connect the first resistance wire 141 to the power line 13 and the first heating wire 151 respectively, and connect the second resistance wire 142 to the power line 13 and the second heating wire 152 respectively.

[0073] It is understood that steps S1 and S2 include two scenarios: First, heating wires, resistance wires, and conductive wires can be laid on the display substrate 11, reserving an area for the display panel 12, and then the display panel 12 is placed in the reserved area. Second, heating wires are laid on the display substrate 11, the display panel 12 is placed there, and then power lines 13 and resistance wires are laid. Neither method affects the implementation of the present invention and both fall within the protection scope of the present invention.

[0074] In one embodiment, before step S4, the arrangement method further includes: S31, winding the second resistor wire 142 to form a plurality of bow-shaped bends 1423, wherein the bow-shaped bends 1423 are of a preset size.

[0075] In one embodiment, the first resistance line 141 and the second resistance line 142 each include a first segment 1421 connected to the positive terminal of the power line 13 and a second segment 1422 connected to the negative terminal of the power line 13; step S3 includes:

[0076] S301, Set the length and width of the first segment 1421.

[0077] S302. Calculate the length and width of the second segment 1422 using the following formula:

[0078]

[0079] In Formula 2, L k R is the length of the second segment 1422. max Let ρ be the equivalent resistance of the first or second path, and L be the resistivity. j W is the length of the heating wire through which the first resistance wire 141 or the second resistance wire 142 is connected. j L is the width of the heating wire. i W is the length of the first segment 1421; i W is the width of the first segment 1421. k This is the width of the second segment, 1422.

[0080] The arrangement method of the electronic paper display screen 1 and the heating device according to an embodiment of the present invention has the following advantages compared with the prior art:

[0081] The electronic paper display screen 1 of this invention uses resistance wires of different specifications connected in series with heating wires of different lengths. By adjusting the parameters (length or width) of the series resistance wires, the equivalent resistance of the paths containing heating wires of different lengths is made equal. According to Joule's law, paths with equal equivalent resistance will generate the same amount of heat under the same energizing time, thereby ensuring that the heating rate of each area of ​​the display panel 12 is consistent, effectively solving the temperature difference problem between the edge and center of the irregularly shaped screen. Uniform heating allows the electronic paper display panel 12 to quickly reach its normal operating temperature in low-temperature environments, avoiding response delays or display abnormalities caused by insufficient local temperature, and significantly improving the startup speed and display stability in low-temperature environments.

[0082] Meanwhile, due to the matching design of the heating wire and the resistance wire, there are multiple combinations of the two parameters of length and width. Therefore, it can be modified to adapt to various shapes of display screens, breaking through the limitation of the traditional parallel electrode 131 being only applicable to rectangular screens. It can be flexibly adapted to various irregularly shaped screens such as round and curved screens.

[0083] The arrangement method in this invention includes all the technical features of the electronic paper display screen 1. Therefore, all embodiments of the electronic paper display screen 1 in this invention and their beneficial effects are applicable to the arrangement method in this invention, and will not be described in detail hereafter.

[0084] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. An electronic paper display screen, characterized in that, The system includes a display substrate (11), on which a display panel (12) is provided. A power line (13), a first resistance line (141), and a second resistance line (142) are laid on the display substrate (11). The power line (13) is laid around the display panel (12). A first heating wire (151) and a second heating wire (152) are laid between the display panel (12) and the display substrate (11). The first heating wire (151) and the second heating wire (152) are parallel. The first resistance wire (141) is connected in series to one or both ends of the first heating wire (151), and the first resistance wire (141), the first heating wire (151) and the power line (13) are connected to form a first circuit; the second resistance wire (142) is connected in series to one or more ends of the second heating wire (152), and the second resistance wire (142), the second heating wire (152) and the power line (13) are connected to form a second circuit; The length of the first heating wire (151) is greater than the length of the second heating wire (152), and the length of the first resistance wire (141) is less than the length of the second resistance wire (142) or the width of the first resistance wire (141) is greater than the width of the second resistance wire (142), so that the equivalent resistance of the first path is equal to the equivalent resistance of the second path.

2. The electronic paper display screen according to claim 1, characterized in that, The second heating wire (152) includes a first sub-heating wire (1521) and a second sub-heating wire (1522), the first sub-heating wire (1521) and the second sub-heating wire (1522) are parallel, and the first sub-heating wire (1521) and the second sub-heating wire (1522) are connected in series; The length of the second sub-heating wire (1522) is less than the length of the first sub-heating wire (1521), and the lengths of both the first sub-heating wire (1521) and the second sub-heating wire (1522) are less than the length of the first heating wire (151).

3. The electronic paper display screen according to claim 2, characterized in that, The width of the first resistance wire (141) is equal to the width of the second resistance wire (142). The second resistance wire (142) is wound with a plurality of bow-shaped bends (1423), and the bow-shaped bends (1423) are of a preset size.

4. The electronic paper display screen according to claim 3, characterized in that, The number of the bow-shaped bends (1423) of the second resistance wire (142) at the second sub-heating wire (1522) is greater than the number of the bow-shaped bends (1423) of the second resistance wire (142) at the first sub-heating wire (1521).

5. The electronic paper display screen according to claim 1, characterized in that, One electrode (131) of the power line (13) is located at the bottom of the display panel (12), and the other electrode (131) of the power line (13) is located at the top of the display panel (12).

6. The electronic paper display screen according to claim 1, characterized in that, The first resistance wire (141) and the second resistance wire (142) each include a first segment (1421) connected to the positive terminal of the power line (13) and a second segment (1422) connected to the negative terminal of the power line (13); The electronic paper display screen (1) is a symmetrical display screen. The width of the first segment (1421) is equal to the width of the second segment (1422), and the length of the first segment (1421) is equal to the length of the second segment (1422), both of which are calculated using the following formula: In Formula 1, L i L is the length of the first segment (1421). k R is the length of the second segment (1422). max Let ρ be the equivalent resistance of the first or second path, and L be the resistivity. j W is the length of the heating wire through which the first resistance wire (141) or the second resistance wire (142) is connected. j W is the width of the heating wire. i The width of the first segment (1421).

7. The electronic paper display screen according to claim 1, characterized in that, The first resistance wire (141) and the second resistance wire (142) each include a first segment (1421) connected to the positive terminal of the power line (13) and a second segment (1422) connected to the negative terminal of the power line (13); The electronic paper display screen (1) is an asymmetrical display screen. Given the width and length of the first segment (1421), the length and width of the second segment (1422) have the following relationship: In Formula 2, L k R is the length of the second segment (1422). max Let ρ be the equivalent resistance of the first or second path, and L be the resistivity. j W is the length of the heating wire through which the first resistance wire (141) or the second resistance wire (142) is connected. j L is the width of the heating wire. i W is the length of the first segment (1421); i W is the width of the first segment (1421). k The width of the second segment (1422).

8. A method for arranging a heating device, characterized in that, The arrangement method is applied to the electronic paper display screen (1) as described in any one of claims 1-7, and the arrangement method includes: S1. Lay the first heating wire (151) and the second heating wire (152) between the display panel (12) and the display substrate (11) so that the first heating wire (151) and the second heating wire (152) are parallel. S2. Wrap the power cord (13) around the display panel (12) and lay it on the display substrate (11); S3. Select a first resistance wire (141) and a second resistance wire (142), wherein the length of the first resistance wire (141) is less than the length of the second resistance wire (142) or the width of the first resistance wire (141) is greater than the width of the second resistance wire (142), and the equivalent resistance of the first heating wire (151) and the first resistance wire (141) is equal to the equivalent resistance of the second heating wire (152) and the second resistance wire (142). S4. Lay the first resistance wire (141) and the second resistance wire (142) on the display substrate (11), connect the first resistance wire (141) to the power line (13) and the first heating wire (151) respectively, and connect the second resistance wire (142) to the power line (13) and the second heating wire (152) respectively.

9. The arrangement method according to claim 8, characterized in that, Before step S4, the arrangement method further includes: S31. The second resistance wire (142) is wound to form a plurality of bow-shaped bends (1423), wherein the bow-shaped bends (1423) are of a preset size.

10. The arrangement method according to claim 8, characterized in that, Both the first resistance wire (141) and the second resistance wire (142) include a first segment (1421) connected to the positive terminal of the power line (13) and a second segment (1422) connected to the negative terminal of the power line (13); step S3 includes: S301, Set the length and width of the first segment (1421); S302. Calculate the length and width of the second segment (1422) using the following formula: In Formula 2, L k R is the length of the second segment (1422). max Let ρ be the equivalent resistance of the first or second path, and L be the resistivity. j W is the length of the heating wire through which the first resistance wire (141) or the second resistance wire (142) is connected. j L is the width of the heating wire. i W is the length of the first segment (1421); i W is the width of the first segment (1421). k The width of the second segment (1422).

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