An electronic paper segment code display module and electronic device with heating function

Abstract

An electronic paper segment code display module with heating function includes an electronic paper film layer, a backplane layer, at least one heating wire, and a segment code control module. The electronic paper film layer includes a common electrode layer and an electronic paper ink capsule layer. The backplane layer uses a flexible PCB board (FPC) as the base layer, and the upper layer of the FPC board includes segment code pixel electrodes. The heating wire is located on the lower layer of the FPC board. The heating wire is electrically connected to the segment code control module. The technical solution of this application to solve the above-mentioned technical problems is to add a heating function to the electronic paper segment code display module. Compared with pasting a heating film on the back of the display screen, the heating wire of this application solution is directly set in the electronic paper segment code display module, and is protected by the outer shell of the display screen and has temperature isolation. This application solution requires less heat and can easily maintain a stable temperature environment.

Description

Technical Field

[0001] This application belongs to the field of display technology, specifically relating to electronic paper segment code display modules and electronic devices with heating function. Background Technology

[0002] Electronic paper display (EPD) is a new type of display technology with advantages such as ultra-low power consumption, wide viewing angle, high contrast, and flexibility. It is widely used in e-book readers, electronic tags, smart wearable devices, and other fields.

[0003] Segment-based electronic paper displays are a type of electronic paper display that consists of multiple independent display segments. By controlling the display state of each segment, numbers, letters, or simple symbols can be displayed. They inherit the advantages of traditional electronic paper displays while also offering advantages such as simple structure and low cost, making them ideal for applications requiring the display of fixed information for extended periods, such as electronic shelf labels and smart meters.

[0004] However, in low-temperature environments, the response speed of e-paper displays decreases significantly, leading to longer refresh times, poorer display quality, and even ghosting. To address this issue, existing technologies typically employ the following methods: Using low-temperature electronic ink: This is costly, and the improvement in low-temperature performance is limited. Adding a heating device: A heating film is attached to the back of the display, but this results in uneven heating, affects display quality, and increases module thickness and process complexity.

[0005] In existing technologies, the response speed of electronic paper displays decreases significantly in low-temperature environments, leading to longer refresh times, deteriorated display quality, and even ghosting. Existing segment-type electronic paper displays with heating functions suffer from the following main problems: uneven heating due to the heating film adhered to the back of the display can easily cause localized excessively high or low temperatures, affecting display quality and lifespan. Furthermore, it increases the complexity of the module manufacturing process, hindering industry development. Summary of the Invention

[0006] The technical problem to be solved by this invention is that the response speed of electronic paper displays decreases significantly in low-temperature environments.

[0007] The technical solution of this application to solve the above-mentioned technical problems is to add a heating function to the electronic paper segment code display module. Compared with pasting a heating film on the back of the display screen, the heating wire of this application is directly set in the electronic paper segment code display module, and is protected by the outer shell of the display screen and has temperature isolation. This application solution requires less heat and is easy to maintain a stable temperature environment.

[0008] An electronic paper segment code display module with heating function includes an electronic paper film layer, a backplane layer, at least one heating wire, and a segment code control module; the electronic paper film layer includes a common electrode layer and an electronic paper ink capsule layer; the backplane layer is based on a flexible PCB board (FPC), and the upper layer of the FPC board includes segment code pixel electrodes; the heating wire is located on the lower layer of the FPC board; the heating wire is electrically connected to the segment code control module.

[0009] It is possible that the heating wires include two or more wires, which are connected in parallel and then connected to the segment code control module.

[0010] It is possible that the aforementioned common electrode layer is composed of an ITO conductive film.

[0011] It is possible that the aforementioned segment pixel electrodes are formed by processing the bottom copper film of the FPC board.

[0012] It can also include a temperature control module, which includes a temperature control module and a temperature sensor, and the temperature sensor and the temperature control module are electrically connected.

[0013] Yes, the temperature sensor mentioned above is a thermistor.

[0014] The temperature control module may include a voltage comparator, and the temperature-sensitive resistor and the fixed resistor R1 form a voltage divider circuit. The voltage divider circuit obtains a temperature control voltage divider, which is compared with a reference voltage by the input voltage comparator. The voltage comparator outputs an electrical signal to control the heating wire to turn on or off.

[0015] It may also include a drive module, where the output of the voltage comparator is connected to the input of the drive module, the output of the drive module is electrically connected to the heating wire, and the output of the voltage comparator controls the on / off state of the output voltage of the drive module.

[0016] One of the beneficial effects of the technical solution in this application is that, compared with pasting a heating film on the back of the display screen, the heating wire of this application solution is directly set in the electronic paper segment code display module, and is protected by the outer shell of the display screen and has temperature isolation. This application solution requires less heat and is easy to maintain a stable temperature environment.

[0017] One of the beneficial effects of the technical solution in this application is that when the electronic paper module is in a low-temperature environment, a temperature sensor and controller are used to automatically turn on the heating function according to the ambient temperature. The heating electrodes in the segment pixels are powered through the positive and negative heating electrodes. The heating electrodes in the segment pixels are connected to the positive and negative terminals of the power supply, thereby generating Joule heat and raising the module temperature. Even when the electronic paper module is in a low-temperature environment, the electrophoretic properties of the charged particles in the electronic paper capsule still maintain the performance of room temperature.

[0018] One of the beneficial effects of the technical solution in this application is that the present invention can also adjust the heating power to achieve precise temperature control and reduce power consumption.

[0019] One of the beneficial effects of the technical solution in this application is that the temperature sensor is a thermistor, which is simple and effective.

[0020] One of the beneficial effects of the technical solution in this application is that integrating the heating function into the back panel of the electronic paper display and using a metal mesh heating layer can achieve uniform heating and improve heating efficiency, thereby reducing module complexity. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the principle of an electronic paper segment code display module; Figure 2 This is a schematic diagram of the cross-section of an electronic paper segment code display module. Figure 3 This is a schematic diagram of the principle of Example 1; Figure 4 This is a schematic diagram of the cross-section principle of Example 1; Figure 5 This is a schematic diagram of the principle of Example 2; Figure 6 This is a schematic diagram of the principle of Example 3; Figure 7 This is a schematic diagram of the cross-section principle of Example 3. Figure 8 This is a schematic diagram of the circuit principle in Example 4; Figure 9 This is a schematic diagram of the circuit principle in Example 5. Detailed Implementation

[0022] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0023] It should be noted that the following description of preferred embodiments of this application does not constitute any limitation on this application. The description of preferred embodiments is merely an illustration of the general principles of this application. The embodiments described in this application are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the equipment or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," and technical features numbered with Arabic numerals 1, 2, 3, etc., and designations such as "A" and "B," are used for descriptive purposes only, for ease of explanation, and do not represent a temporal or spatial order; they should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first," "second," and numbered with Arabic numerals 1, 2, 3, etc., may explicitly or implicitly include one or more of that feature. In the description of this application, "several" means two or more, unless otherwise expressly and specifically defined.

[0025] This invention proposes an integrated heating design on a flexible substrate: the heating function is integrated into the flexible backplane of a segment electronic paper display. A metal mesh heating layer is used to achieve uniform heating and improve heating efficiency. The flexible display backplane of this invention has segment pixel electrodes and heating electrodes, with the heating electrodes located below the segment electrodes and separated by an insulating layer. When the electronic paper module is in a low-temperature environment, a temperature sensor and controller automatically activate the heating function based on the ambient temperature. Power is supplied to the heating electrodes within the segment pixels through the positive and negative heating master electrodes. The heating electrodes within the segment pixels are connected to the positive and negative terminals of the power supply, thereby generating Joule heating and raising the module temperature. Even in a low-temperature environment, the electrophoretic properties of the charged particles within the electronic paper capsule maintain their performance at room temperature. Voltage is conducted to the segment pixel electrodes through the segment pixel data lines, enabling rapid image refresh. Furthermore, this invention allows for adjustable heating power, achieving precise temperature control and reducing power consumption.

[0026] Figure 1 A schematic diagram of the principle of an electronic paper segment code display module.

[0027] The electronic paper segment display module includes a set of segment pixel electrode areas 0110 that can be lit individually. The segment control chip 01210 can control the segment pixel electrode areas to be displayed or not displayed individually through the control line 0121, so as to realize the segment display function.

[0028] Figure 2 A schematic diagram of the cross-section of an electronic paper segment code display module.

[0029] The electronic paper segment display module consists of a common electrode, segment pixel electrodes, and an ink sac 0220 between the two electrodes, and uses a flexible circuit board 0210 as the substrate.

[0030] Figure 3 Example 1: Schematic diagram of the principle.

[0031] Figure 4 Example 1: Schematic diagram of cross-section principle.

[0032] like Figure 3 , Figure 4 An electronic paper segment code display module with heating function includes an electronic paper film layer 0410, a back plate layer 0420, at least one heating wire 0310, and a segment code control module 0320; the electronic paper film layer includes a common electrode layer 0411 and an electronic paper ink capsule layer 0412; the back plate layer is based on a flexible PCB board (FPC), and the upper layer of the FPC board includes segment code pixel electrodes 0413; the heating wire is located on the lower layer of the FPC board; the heating wire is electrically connected to the segment code control module.

[0033] like Figure 3 The heating wires consist of two or more wires connected in parallel and then connected to the segment code control module. Figure 5 Example 2: Schematic diagram of the principle. Figure 5 After the heating wires 0510 are connected in parallel, they are connected to the segment code control chip 0530 via the bus 0520.

[0034] It is possible that the aforementioned common electrode layer is composed of an ITO conductive film.

[0035] It is possible that the aforementioned segment pixel electrodes are formed by processing the bottom copper film of the FPC board.

[0036] Figure 6 Example 3: Schematic diagram of the principle.

[0037] Figure 6 It also includes a temperature control module, which includes a temperature control module 0610 and a temperature sensor 0620. The temperature sensor is connected to the temperature control module via an electrical signal 0630.

[0038] Yes, the temperature sensor mentioned above is a thermistor.

[0039] Figure 7 Example 3: Schematic diagram of the cross-section principle. Figure 6 The 0710 thermistor can be placed below the flexible circuit board.

[0040] Figure 8 Example 4: Circuit schematic diagram.

[0041] The aforementioned temperature control module includes a voltage comparator 0810. In the circuit diagram, a thermistor 0820 and a fixed resistor 0821 form a voltage divider circuit. The voltage between the power supply voltage and the power supply ground is divided by the thermistor 0820 and the fixed resistor 0821 to obtain the temperature control voltage divider 0822. The temperature control voltage divider is obtained by the aforementioned voltage divider circuit and compared with the reference voltage 0823. The voltage comparator outputs an electrical signal to control the heating wire 0825 to turn on or off.

[0042] Figure 9 Example 5 shows a circuit diagram. Based on Example 4, a drive module 0850 is added to drive the heating wire 0825 to turn on or off.

[0043] When the electronic paper module is in a low-temperature environment, a temperature sensor and controller automatically activate the heating function based on the ambient temperature. Power is supplied to the heating electrodes within the segment pixels via the positive and negative heating master electrodes. These heating electrodes are connected to the positive and negative terminals of the power supply, generating Joule heating and raising the module temperature. Even in low-temperature environments, the electrophoretic properties of the charged particles within the electronic paper capsule maintain their performance at room temperature. Voltage is conducted to the segment pixel electrodes via the segment pixel data lines, enabling rapid image processing. Furthermore, this invention allows for adjustable heating power, achieving precise temperature control and reducing power consumption.

[0044] Integrating the heating function into the back panel of the electronic paper display, and using a metal mesh heating layer, enables uniform heating and improves heating efficiency. This also reduces module complexity.

[0045] like Figures 1 to 9 As shown, the above description is only an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An electronic paper segment code display module with heating function, characterized in that: Includes an electronic paper film layer, a backplane layer, at least one heating wire, and a segment code control module; The electronic paper film layer includes a common electrode layer and an electronic paper ink capsule layer; The backplane layer uses a flexible PCB board (FPC) as the base layer, and the upper layer of the FPC board includes segment pixel electrodes. The heating wire is located on the lower layer of the FPC board; The heating wire is electrically connected to the segment code control module.

2. The display module according to claim 1, characterized in that, The heating wires include two or more wires, which are connected in parallel and then connected to the segment code control module.

3. The display module according to claim 1, characterized in that, The common electrode layer is composed of an ITO conductive film.

4. The display module according to claim 1, characterized in that, The segment pixel electrode is formed by processing the bottom copper film of the FPC board.

5. The display module according to claim 1, characterized in that, It also includes a temperature control module, which includes a temperature control module and a temperature sensor, and the temperature sensor and the temperature control module are electrically connected.

6. The display module according to claim 5, characterized in that, The temperature sensor is a thermistor.

7. The display module according to claim 6, characterized in that, The temperature control module includes a voltage comparator. The thermistor and the fixed resistor R1 form a voltage divider circuit. The voltage divider circuit obtains a temperature control voltage divider. The input voltage comparator is compared with a reference voltage. The voltage comparator outputs an electrical signal to control the heating wire to turn on or off.

8. The display module according to claim 7, characterized in that, It also includes a drive module, the output of the voltage comparator is connected to the input of the drive module, the output of the drive module is electrically connected to the heating wire, and the output of the voltage comparator controls the on / off state of the output voltage of the drive module.

9. An electronic device, characterized in that, The electronic paper segment code display module with heating function as described in any one of claims 1 to 8.

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