Flexible circuit board

Abstract

The utility model provides a flexible circuit board. The flexible circuit board specifically comprises a first independent circuit group and a second independent circuit group. Wherein the first independent line group is composed of a plurality of first independent lines, each first independent line is in contact with a dimming area of the functional element and connects the dimming area with the control unit, and a first terminal of the first independent line group connects each positive electrode of the functional element to the control unit; the second terminal of the first independent line group connects the common negative electrode of the functional element to the control unit; the second independent circuit group is composed of a plurality of second independent circuits, the second independent circuit group comprises at least one temperature sensor, and the temperature sensor is used for measuring the temperature of the functional element in the temperature measuring area; the first terminal, the second terminal and the temperature sensor are integrated on the flexible circuit board, so that the number of connectors and welding spots is reduced, and the integration level and reliability of the system are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of zoned dimming, in particular to a flexible circuit board. BACKGROUND

[0002] The current zoned dimming belongs to a new industry, and the existing generation process is to use ordinary round copper wires to be welded to the dimming film by tin paste. A large number of round copper wires have large volume and occupy much space, which is not conducive to the miniaturization design of equipment. A large amount of manual work is required in the connection and assembly process of the round copper wires, the process is complex and prone to errors, and the maintenance cost is high when the round copper wires are broken or have poor contact, and it is difficult to quickly repair and replace. CONTENT OF THE INVENTION

[0003] Therefore, in order to overcome the shortcomings of the prior art, the present application provides a flexible circuit board in contact with a functional element (1) having electrically controllable optical properties, comprising:

[0004] a first independent line group (21) composed of a plurality of first independent lines, each of the first independent lines being in contact with a dimming area (11) of the functional element (1) and connecting the dimming area (11) with a control unit (3);

[0005] a second independent line group (22) composed of a plurality of second independent lines, the second independent line group (22) comprising at least one temperature sensor (25) for measuring the temperature of the functional element (1) in a temperature measurement area (12);

[0006] wherein the first terminals (23) of the first independent line group (21) connect respective positive electrodes of the functional element (1) to the control unit (3), and the second terminals (24) of the first independent line group (21) connect a common negative electrode of the functional element (1) to the control unit (3).

[0007] In particular, the flexible circuit board is in contact with a functional element (1) having electrically controllable optical properties, and the functional element (1) is a polymer dispersed liquid crystal functional element, a polymer network liquid crystal functional element or a suspended particle functional element.

[0008] In particular, the flexible circuit board is in contact with a functional element (1) having electrically controllable optical properties, and the functional element (1) is an intermediate layer in a multilayer glass made of glass or optically transparent plastic.

[0009] In particular, the flexible circuit board is in contact with a functional element (1) having electrically controllable optical properties, and the functional element (1) is an intermediate layer of a multilayer glass for vehicle or building glass.

[0010] Specifically, the number of positive electrodes in the functional element (1) is 2-49.

[0011] Specifically, the length of the flexible circuit board (2) is 20mm-4000mm.

[0012] Specifically, the height of the temperature sensor (25) is less than 0.7mm.

[0013] Specifically, the temperature sensor (25) is coated with a protective layer (26) around the temperature sensor (25) to protect the temperature sensor (25) from mechanical damage.

[0014] Specifically, the protective layer (26) is an adhesive layer for fixing the temperature sensor (25) in the temperature measurement area (12).

[0015] Specificly, a layer of solder paste or anisotropic conductive adhesive is provided between the positive electrode of the functional element (1) and the first terminal (23); a layer of solder paste or anisotropic conductive adhesive is provided between the negative electrode of the functional element (1) and the second terminal (24).

[0016] Specifically, the temperature sensor (25) is mounted on a separate flexible circuit board (27), and the separate flexible circuit board (27) is connected to the flexible circuit board (2) through a connecting layer, which is a solder paste or anisotropic conductive adhesive.

[0017] Specifically, the flexible circuit board (2) is composed of a plurality of flexible circuit boards connected in series, and the plurality of short flexible circuit boards are connected through a connecting layer made of solder paste or anisotropic conductive adhesive.

[0018] Compared with the prior art, the advantages of the present application are: the flexible circuit board realizes high-density wiring and ultra-long wiring function, improves the high-precision connection of complex circuits; and the flexible circuit board integrates more functional modules, integrates the first terminal, the second terminal and the temperature sensor on the flexible circuit board, thereby realizing real-time dimming control and temperature monitoring, reducing the number of connectors and solder joints, and improving the integration and reliability of the system; and the flexible circuit board still maintains ultra-thin thickness after integrating the first terminal, the second terminal and the temperature sensor. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0020] Figure 1This is a schematic diagram of the structure of the control unit controlling the multi-zone dimming of functional elements via a flexible circuit board in an embodiment of this application;

[0021] Figure 2 This is a schematic diagram of a temperature sensor mounted on a separate flexible circuit board in an embodiment of this application. Detailed Implementation

[0022] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0023] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. 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] It should be noted that the following description covers various aspects of embodiments within the scope of protection of this application. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0025] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0026] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0027] like Figure 1As shown, the embodiment of the present application provides a multi-partition light-adjusting functional element with electrically controllable optical characteristics, which comprises a functional element 1, a flexible circuit board 2 and a control unit 3.

[0028] The functional element 1 has a plurality of light-adjusting areas 11 and a temperature measuring area 12. The plurality of light-adjusting areas 11 are respectively provided with positive electrodes, and the plurality of light-adjusting areas are provided with a common negative electrode. The positive electrodes of the plurality of light-adjusting areas 11 respectively receive signals from the control unit 3 to control the state of the light-adjusting film.

[0029] The flexible circuit board 2 is in contact with the functional element 1 with electrically controllable optical characteristics. The flexible circuit board 2 comprises a first independent circuit group 21 and a second independent circuit group 22.

[0030] The first independent circuit group 21 is composed of a plurality of first independent circuits. Each first independent circuit is in contact with a light-adjusting area 11 of the functional element 1. The first independent circuit group is used to connect the control unit 3 and the plurality of light-adjusting areas 11 of the functional element 1. The first independent circuit comprises a plurality of first terminals 23 and a second terminal 24. The first terminals 23 are used to connect the control unit 3 and the positive electrodes of the functional element 1. The second terminal 24 is used to connect the control unit 3 and the common negative electrode of the functional element 1.

[0031] The second independent circuit group 22 comprises a plurality of second independent circuits. The second independent circuit group is used to connect the control unit 3 and the temperature measuring area 12 of the functional element 1. The second independent circuit comprises at least one temperature sensor 25. The temperature sensor 25 is used to measure the temperature of the functional element 1 in the temperature measuring area 12.

[0032] The flexible circuit board in the embodiment realizes high-density wiring and super-long wiring harness functions, improves the high-precision connection of complex circuits, and integrates more functional modules on the flexible circuit board. The first terminal, the second terminal and the temperature sensor are integrated on the flexible circuit board, so as to realize real-time light-adjusting control and temperature monitoring, reduce the number of connectors and welding points, and improve the integration and reliability of the system. After the first terminal, the second terminal and the temperature sensor are integrated on the flexible circuit board, the flexible circuit board still maintains an ultra-thin thickness.

[0033] In an embodiment, the functional element 1 is a polymer dispersed liquid crystal (PDLC) functional element, a polymer network liquid crystal (PNLC) functional element or a suspended particle (SPD) functional element. PDLC is a liquid crystal dispersed in micrometer-sized droplets in an organic solid polymer matrix. Due to the optical axis of the small droplets composed of liquid crystal molecules being in free orientation, the refractive index thereof does not match that of the matrix, and when light passes through the matrix, it is strongly scattered by the droplets to present an opaque milky white state or a semi-transparent state. Application of an electric field can adjust the orientation of the optical axis of the liquid crystal droplets, and when the refractive indices thereof match, a transparent state is presented. Removal of the electric field restores the original light scattering state of the liquid crystal droplets, thereby performing display. The mode of PNLC, i.e. polymer network liquid crystal, is compared with PDLC. In PNLC, the liquid crystal is not in the form of spherical (or ellipsoidal) droplets, but is distributed in a three-dimensional polymer network to form a continuous channel network. The suspended particle (SPD) functional element, i.e. a new type of electrically controlled color-changing and light-adjusting glass product made by combining the photosensitive properties of SPD with glass. It can be used instead of curtains to freely adjust the light transmittance effect and select indoor light suitable for oneself. When an alternating voltage is applied to the SPD film, the particles are oriented and arranged under the action of the electric field, and then light can be transmitted.

[0034] In an embodiment, the functional element 1 is an intermediate layer in a multi-layer glass made of glass or optically transparent plastic. The flexible circuit board 2 is arranged on the glass or at the intermediate layer position of the multi-layer glass.

[0035] In an embodiment, the functional element 1 is an intermediate layer of a multi-layer glass for vehicle or building glass, and the flexible circuit board 2 is arranged at the intermediate layer position of the multi-layer glass.

[0036] In an embodiment, the number of positive electrodes in the functional element 1 is 2-49. That is, the number of the first terminals 23 in the flexible circuit board 2 is 2-49, the number of the first terminals 23 of the first independent circuit group 21 is consistent with the number of the positive electrodes in the functional element 1, and the first terminals 23 of the first independent circuit group 21 are connected one by one with the positive electrodes in the functional element 1. The first terminals 23 of the first independent circuit group 21 connect each positive electrode of the functional element 1 to the control unit 3, and the control unit 3 realizes multi-zone light control.

[0037] In an embodiment, the length of the flexible circuit board 2 is 20 mm-4000 mm. The 20 mm-4000 mm length of the flexible circuit board 2 can be arranged to span a longer functional element 1, thereby meeting the multi-size requirements of the functional element 1.

[0038] In an embodiment, the height of the temperature sensor 25 is less than 0.7 mm. The temperature sensor 25 can be arranged in a relatively thin form and can be completely pressed into the functional element 1.

[0039] In an embodiment, asFigure 2 As shown, a protective layer (26) is arranged around the temperature sensor 25 to protect the temperature sensor 25 from mechanical impact.

[0040] In an embodiment, the protective layer (26) arranged around the temperature sensor 25 is an adhesive layer, which fixes the position of the temperature sensor 25 in the functional element 1, and the adhesive layer is arranged around the temperature sensor 25 without being arranged on the top of the temperature sensor 25, so that the temperature sensor 25 is in direct contact with the temperature measuring area 12 of the functional element 1, and the adhesive layer does not affect the temperature measuring sensitivity of the temperature sensor 25.

[0041] In an embodiment, a layer of solder paste or anisotropic conductive adhesive is arranged between the positive electrode of the functional element 1 and the first terminal 23; a layer of solder paste or anisotropic conductive adhesive is arranged between the negative electrode of the functional element 1 and the second terminal 24; the solder paste welding and the anisotropic conductive adhesive film pressing process realize the close fixed connection between the positive electrode and the first terminal 23 and the close fixed connection between the negative electrode and the second terminal 24.

[0042] In an embodiment, as shown in the figure, the temperature sensor 25 is mounted on a separate flexible circuit board (27), and the separate flexible circuit board (27) is connected to the flexible circuit board 2 through a layer of solder paste or anisotropic conductive adhesive. Figure 2

[0043] In an embodiment, the longer flexible circuit board can be composed of multiple short flexible circuit boards connected in series, and the flexible circuit board 2 includes multiple short flexible circuit boards connected in series, and the short flexible circuit boards are connected through a layer of solder paste or anisotropic conductive adhesive.

[0044] Embodiment 1

[0045] The functional element 1 is an intermediate layer of a multi-layer glass for vehicle or building glass, and the intermediate layer of the multi-layer glass is provided with a plurality of light adjusting areas 11 and temperature measuring areas 12. The positive electrodes of the functional element 1 are arranged side by side on the same side edge of the light adjusting areas 11, and the common negative electrode of the functional element 1 is arranged on one side of the light adjusting areas 11. The light adjusting areas 11 receive the signals given by the control unit 3 through the flexible circuit board 2 to control the state of the light adjusting areas 11.

[0046] The flexible circuit board 2 is arranged at the position of the intermediate layer of the multi-layer glass, and the flexible circuit board 2 includes a first independent line group 21 and a second independent line group 22.

[0047] ​The first independent line group 21 is provided with a plurality of first independent lines which are independent and parallel to each other. The first independent lines include a plurality of positive independent lines and one negative independent line. The first independent line group is used to connect the control unit 3 and a plurality of dimming areas 11 in the functional element 1. The negative independent line is arranged at the side closest to the dimming area 11 in the first independent line group 21. From the electrical control side to the non-electrical control side, the lengths of the first independent lines increase in turn, and the first independent line between the first independent line group and the second independent line group is the longest. That is, from the dimming area 11 side to the temperature measurement area 12 side, the lengths of the first independent lines increase in turn. The ends of the plurality of positive independent lines are all led to the side edge of the second independent line group away from the first independent line group, that is, the edge of the temperature measurement area 12 side of the flexible circuit board 2, to form a linear positive independent line end connection point.

[0048] The second independent line group 22 is arranged in the same plane as the first independent line group 21, and the independent lines in the two groups are arranged in parallel. The second independent line group 22 includes a plurality of second independent lines, and is used to connect the control unit 3 and the temperature measurement area 12 in the functional element 1. From the electrical control side to the non-electrical control side, the lengths of the first independent lines increase in turn, and the second independent line between the first independent line group and the second independent line group is the longest. That is, from the temperature measurement area 12 side to the dimming area 11 side, the lengths of the second independent lines increase in turn. The ends of the second independent lines are all led to the side edge of the first independent line group away from the second independent line group, that is, the edge of the temperature measurement area 12 side of the flexible circuit board 2, to form a linear second independent line end connection point.

[0049] The first terminal 23 is arranged between the first independent line and the dimming area 11, and connects the first independent line and the dimming area 11. The first terminal 23 is integrated on the first independent line group 21. A plurality of first terminals 23 are arranged one-to-one corresponding to a plurality of dimming areas 11, respectively, for dimming control.

[0050] The second terminal 24 is arranged at the end of the negative independent line in the first independent line group 21, and connects the common negative electrode of the first independent line and the dimming area 11. The second terminal 24 is in communication with a plurality of first terminals 23, respectively. The control unit 3, the positive independent line, the first terminal 23, the second terminal 24, and the negative independent line form a closed conduction loop. The control unit 3 can control the dimming area 11.

[0051] At least one temperature sensor 25 is arranged between the second independent line group 22 and the temperature measuring area 12, i.e. at the end of the independent line in the second independent line group 22, connecting the second independent line and the temperature measuring area. The temperature sensor 25 can be arranged 3-9, uniformly distributed side by side in the temperature measuring area 12, so as to improve the sensitivity and uniformity of temperature monitoring.

[0052] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which shall be covered within the protection scope of the present application.

Claims

1. A flexible circuit board (2) in contact with a functional element (1) having electrically controllable optical properties, characterized in that, The application relates to a flexible circuit board (2) for a functional element (1) with electrically controllable optical properties, comprising: a first independent line group (21) consisting of a plurality of first independent lines, each of the first independent lines being in contact with a dimming area (11) of the functional element (1) and connecting the dimming area (11) to a control unit (3); a second independent line group (22) consisting of a plurality of second independent lines, the second independent line group (22) comprising at least one temperature sensor (25) for measuring the temperature of the functional element (1) in a temperature measurement area (12); wherein a first terminal (23) of the first independent line group (21) connects a respective positive electrode of the functional element (1) to the control unit (3), and a second terminal (24) of the first independent line group (21) connects a common negative electrode of the functional element (1) to the control unit (3).

2. The flexible circuit board (2) according to claim 1, characterized in that The flexible circuit board is in contact with a functional element (1) with electrically controllable optical properties, the functional element (1) being a polymer dispersed liquid crystal functional element, a polymer network liquid crystal functional element or a suspended particle functional element.

3. The flexible circuit board (2) according to claim 1, characterized in that The flexible circuit board is in contact with a functional element (1) with electrically controllable optical properties, the functional element (1) being an intermediate layer in a multilayer glass made of glass or optically transparent plastic.

4. The flexible circuit board (2) according to claim 1, characterized in that The flexible circuit board is in contact with a functional element (1) with electrically controllable optical properties, the functional element (1) being an intermediate layer of a multilayer glass for vehicle or building glass.

5. The flexible circuit board (2) according to claim 1, characterized in that The number of positive electrodes in the functional element (1) is 2-49.

6. The flexible circuit board (2) according to claim 1, characterized in that The length of the flexible circuit board (2) is 20-4000 mm.

7. The flexible circuit board (2) according to claim 1, characterized in that The height of the temperature sensor (25) is less than 0.7 mm.

8. The flexible circuit board (2) according to claim 1, characterized in that The temperature sensor (25) is coated with a protective layer (26) around the temperature sensor (25) for protecting the temperature sensor (25) from mechanical influences.

9. The flexible circuit board (2) according to claim 8, characterized in that The protective layer (26) is an adhesive layer for fixing the temperature sensor (25) in the temperature measurement area (12).

10. The flexible circuit board (2) according to claim 1, characterized in that A layer of solder paste or anisotropic conductive adhesive is arranged between the positive electrode of the functional element (1) and the first terminal (23); and a layer of solder paste or anisotropic conductive adhesive is arranged between the negative electrode of the functional element (1) and the second terminal (24).

11. The flexible circuit board (2) according to claim 1, characterized in that The temperature sensor (25) is mounted on a separate flexible circuit board (27), the separate flexible circuit board (27) being connected to the flexible circuit board (2) by a connecting layer, the connecting layer being solder paste or anisotropic conductive adhesive.

12. The flexible circuit board (2) according to claim 1, characterized in that The flexible circuit board (2) is composed of a plurality of flexible circuit boards connected in series, the plurality of flexible circuit boards being connected by a connecting layer made of solder paste or anisotropic conductive adhesive.

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