Flexible circuit board, display device and vehicle

Abstract

The present disclosure discloses a flexible circuit board, a display device and a vehicle, which are used to save costs and ensure the yield of the flexible circuit board. The flexible circuit board provided by the embodiment of the present disclosure includes: a flexible substrate, a routing layer, and a color temperature sensor; the flexible substrate includes: a first binding area and a second binding area opposite to each other in a first direction, and a connection area located between the first binding area and the second binding area; the routing layer includes: a plurality of first touch signal terminals and a plurality of first color temperature signal terminals located in the first binding area, a plurality of second touch signal terminals and a plurality of second color temperature signal terminals located in the second binding area, a plurality of touch signal routing lines and a plurality of color temperature signal routing lines; the two ends of each touch signal routing line are electrically connected to the first touch signal terminal and the second touch signal terminal respectively; the two ends of each color temperature signal routing line are electrically connected to the first color temperature signal terminal and the second color temperature signal terminal respectively; the color temperature sensor is electrically connected to the plurality of first color temperature signal terminals.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a flexible circuit board, a display device and a vehicle. Background Art

[0002] As the current in-vehicle smart cockpits become more diversified, more and more users require in-vehicle screens to automatically adjust the color temperature of the screen according to the ambient color temperature.

[0003] At present, the commonly used module color temperature sensor (Sensor) design is that the color temperature sensor is attached to the cover plate (CG) of the display screen. The area on the CG where the color temperature sensor needs to be attached is coated with semi-transparent ink to collect the ambient color temperature. The other side of the color temperature sensor is bound to the flexible circuit board (FPC), and the FPC is then buckled with the main board, so as to transmit the ambient color temperature signal to the main board for processing, and then adjust the screen color temperature accordingly. However, if the display screen is a touch screen, such as Figure 1 As shown, it is necessary to set up FPC1 for transmitting touch signals and FPC2 for transmitting ambient color temperature signals, which is costly. In addition, the color temperature Sensor 3 is usually attached to the middle of the CG edge of the display screen 4, and the FPC2 for transmitting touch signals needs to be slotted 5 to avoid the FPC1 for transmitting ambient color temperature signals, and the two sides of the slot 5 are relatively symmetrically bound to the display screen 4. The FPC1 for transmitting ambient color temperature signals is bound to the mainboard 6 in the middle area of ​​the mainboard 6. When the FPC2 for transmitting touch signals is bound to the mainboard 6, in order to facilitate the wiring of the mainboard 6, the FPC2 for transmitting touch signals needs to be located on one side of the FPC1 for transmitting ambient color temperature signals, resulting in the FPC2 for transmitting touch signals requiring a larger profile design, which poses a greater risk of process tearing. Summary of the invention

[0004] The embodiments of the present disclosure provide a flexible circuit board, a display device, and a vehicle, which are used to save costs and ensure the yield of the flexible circuit board.

[0005] A flexible circuit board provided by an embodiment of the present disclosure includes: a flexible substrate, a wiring layer located on one side of the flexible substrate, and a color temperature sensor located on a side of the wiring layer away from the flexible substrate;

[0006] The flexible substrate comprises: a first binding area and a second binding area opposite to each other in a first direction, and a connection area between the first binding area and the second binding area;

[0007] The routing layer includes: a plurality of first touch signal terminals and a plurality of first color temperature signal terminals located in the first binding area, a plurality of second touch signal terminals and a plurality of second color temperature signal terminals located in the second binding area, and a plurality of touch signal routing lines and a plurality of color temperature signal routing lines passing through the connection area and extending to the first binding area and the second binding area;

[0008] Two ends of each touch signal line are electrically connected to the first touch signal terminal and the second touch signal terminal respectively; two ends of each color temperature signal line are electrically connected to the first color temperature signal terminal and the second color temperature signal terminal respectively;

[0009] The color temperature sensor is electrically connected to the plurality of first color temperature signal terminals.

[0010] In some embodiments, the first binding area includes: a first color temperature signal end binding area, and two first touch signal end binding areas respectively located on both sides of the first color temperature signal end binding area in the second direction; the second direction intersects the first direction;

[0011] The first touch signal terminal binding area and the first color temperature signal terminal binding area are disconnected from each other.

[0012] In some embodiments, the second binding region includes: a first sub-region and a second sub-region arranged in the second direction and disconnected from each other;

[0013] The first sub-area only includes a plurality of second touch signal terminals arranged along the second direction;

[0014] The second sub-region includes a plurality of second touch signal terminals and a plurality of second color temperature signal terminals arranged along a second direction; in the second direction, the plurality of second color temperature signal terminals are located on a side of the plurality of second touch signal terminals away from the first sub-region.

[0015] In some embodiments, the routing layer includes: a first conductive layer, and a second conductive layer located on a side of the first conductive layer facing away from the flexible substrate;

[0016] The connection area includes a first overlapping area, in which the orthographic projections of the plurality of touch signal lines and the plurality of color temperature signal lines on the flexible substrate overlap;

[0017] In the first overlapping area, the plurality of touch signal lines are located in one of the first conductive layer and the second conductive layer, and the plurality of color temperature signal lines are located in one of the first conductive layer and the second conductive layer and are in a different layer from the plurality of touch signal lines;

[0018] In the first overlapping region, the first conductive layer is insulated from the second conductive layer;

[0019] In the area outside the first overlapping area, the touch signal routing line includes: a first sub-routing line located in the first conductive layer, and a second sub-routing line located in the second conductive layer and electrically connected to the first sub-routing line;

[0020] The color temperature signal routing line includes: a third sub-routing line located in the first conductive layer, and a fourth sub-routing line located in the second conductive layer and electrically connected to the third sub-routing line.

[0021] In some embodiments, the flexible circuit board also includes: a first insulating layer located between the first conductive layer and the second conductive layer, a second insulating layer located on the side of the second conductive layer facing away from the flexible substrate, a first adhesive layer located between the first conductive layer and the flexible substrate, and a second adhesive layer located between the second conductive layer and the second insulating layer.

[0022] In some embodiments, the first color temperature signal terminal includes: a first sublayer located in the first conductive layer, and a second sublayer located in the second conductive layer;

[0023] The second insulating layer and the second bonding layer have a first opening exposing the second sub-layer, and the color temperature sensor is electrically connected to the second sub-layer in the first opening;

[0024] The flexible circuit board also includes a welding material layer located between the first color temperature signal terminal and the color temperature sensor.

[0025] In some embodiments, the first color temperature signal terminal binding area includes: a third sub-area, and a fourth sub-area located between the third sub-area and the connection area;

[0026] The fourth sub-region includes only the flexible substrate, the first adhesive layer, the first conductive layer and the first insulating layer.

[0027] In some embodiments, the contour of the connection area on one side close to the first binding area has a first recessed area; the first color temperature signal terminal binding area is located in the first recessed area;

[0028] The fourth sub-region is bent along a bending axis parallel to the second direction, so that the third sub-region is located at a side of the connection region away from the wiring layer.

[0029] A display device provided in an embodiment of the present disclosure includes: a display panel, a flexible circuit board provided in an embodiment of the present disclosure, and a main board;

[0030] The first binding area of ​​the flexible circuit board is bound to the display panel, and the second binding area of ​​the flexible circuit board is bound to the mainboard.

[0031] An embodiment of the present disclosure provides a vehicle, and the vehicle includes the display device provided by the embodiment of the present disclosure.

[0032] The flexible circuit board, display device, and vehicle provided by the embodiments of the present disclosure, the flexible circuit board includes a color temperature sensor, a first color temperature signal terminal, a color temperature signal routing, a second color temperature signal terminal, a first touch signal terminal, a touch signal routing, and a second touch signal terminal, that is, the flexible circuit board can transmit color temperature signals and touch signals, and the structures for transmitting color temperature signals and touch signals are integrated on the same flexible substrate. When the display panel needs to use the flexible circuit board to transmit color temperature signals and touch signals to the main board, there is no need to set up two flexible circuit boards for transmitting color temperature signals and touch signals respectively, which can simplify the process flow and save costs. In addition, since there is no need to set up two flexible circuit boards for transmitting color temperature signals and touch signals respectively, there is no problem of risk of tearing of one of the flexible circuit boards due to avoidance of the two flexible circuit boards, thereby ensuring the yield of the flexible circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 A schematic diagram of the structure of a display device provided for related technology;

[0035] Figure 2 A schematic diagram of the structure of a flexible circuit board provided in an embodiment of the present disclosure;

[0036] Figure 3 A schematic diagram of a cross-sectional structure of a flexible circuit board provided in an embodiment of the present disclosure;

[0037] Figure 4 A schematic diagram of the cross-sectional structure of another flexible circuit board provided in an embodiment of the present disclosure;

[0038] Figure 5 A schematic diagram of a cross-sectional structure of another flexible circuit board provided in an embodiment of the present disclosure;

[0039] Figure 6 A schematic diagram of the structure of another flexible circuit board provided in an embodiment of the present disclosure;

[0040] Figure 7 A schematic diagram of the structure of a display device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. And in the absence of conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present disclosure.

[0042] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. "First", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0043] It should be noted that the sizes and shapes of the figures in the accompanying drawings do not reflect the actual proportions, and are only intended to illustrate the present disclosure. The same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions.

[0044] The present disclosure provides a flexible circuit board. Figure 2 As shown, the flexible circuit board includes: a flexible substrate 7, a wiring layer 8 located on one side of the flexible substrate 7, and a color temperature sensor 9 located on a side of the wiring layer 8 away from the flexible substrate 7;

[0045] The flexible substrate 7 includes: a first binding area 701 and a second binding area 702 opposite to each other in a first direction Y, and a connection area 703 located between the first binding area 701 and the second binding area 702;

[0046] The wiring layer 8 includes: a plurality of first touch signal terminals 801 and a plurality of first color temperature signal terminals 803 located in the first binding area 701, a plurality of second touch signal terminals 802 and a plurality of second color temperature signal terminals 804 located in the second binding area 702, and a plurality of touch signal wirings 805 and a plurality of color temperature signal wirings 806 passing through the connection area 703 and extending to the first binding area 701 and the second binding area 702;

[0047] Two ends of each touch signal line 805 are electrically connected to the first touch signal terminal 801 and the second touch signal terminal 802 respectively; two ends of each color temperature signal line 806 are electrically connected to the first color temperature signal terminal 803 and the second color temperature signal terminal 804 respectively;

[0048] The color temperature sensor 9 is electrically connected to the plurality of first color temperature signal terminals 803 .

[0049] The flexible circuit board provided in the embodiment of the present disclosure includes a color temperature sensor, a first color temperature signal terminal, a color temperature signal routing, a second color temperature signal terminal, a first touch signal terminal, a touch signal routing and a second touch signal terminal, that is, the flexible circuit board can transmit color temperature signals and touch signals, and the structures for transmitting color temperature signals and touch signals are integrated on the same flexible substrate. When the display panel needs to use the flexible circuit board to transmit color temperature signals and touch signals to the main board, there is no need to set up two flexible circuit boards for transmitting color temperature signals and touch signals respectively, which can simplify the process flow and save costs. In addition, since there is no need to set up two flexible circuit boards for transmitting color temperature signals and touch signals respectively, there is no problem of the risk of tearing of one of the flexible circuit boards due to the avoidance of the two flexible circuit boards, thereby ensuring the yield of the flexible circuit board.

[0050] It should be noted that, in a specific implementation, the first touch signal end of the first binding area is bound to the display panel, the color temperature sensor is attached to the display panel, and the second touch signal end and the second color temperature signal end of the second binding area are bound to the mainboard, so that the flexible circuit board provided in the embodiment of the present disclosure can transmit the touch signal of the display panel to the mainboard for processing, and can also transmit the color temperature signal corresponding to the color temperature of the display panel collected by the color temperature sensor to the mainboard for processing to adjust the color temperature of the display panel.

[0051] In a specific implementation, for example, the total number of first touch signal terminals is equal to the total number of second touch signal terminals, the total number of first color temperature signal terminals is equal to the total number of second color temperature signal terminals, etc. The first touch signal terminal, the second touch signal terminal, the first color temperature signal terminal, and the second color temperature signal terminal can be set according to actual needs.

[0052] In some embodiments, Figure 2 As shown, the first binding area 701 includes: a first color temperature signal end binding area 7011, and two first touch signal end binding areas 7012 respectively located on both sides of the first color temperature signal end binding area 7011 in the second direction X; the second direction X intersects with the first direction Y;

[0053] The first touch signal terminal binding area 7012 and the first color temperature signal terminal binding area 7011 are disconnected from each other.

[0054] In the flexible circuit board provided by the embodiment of the present disclosure, the first color temperature signal terminal binding area is located between the two first touch signal terminal binding areas. Since the color temperature sensor is electrically connected to the first color temperature signal terminal in the first color temperature signal terminal binding area, the color temperature sensor is also located between the two first touch signal terminal binding areas. When the flexible circuit board is bound to the display panel, the color temperature sensor can be attached to the middle of the edge of the display panel, which is beneficial to improving the color temperature acquisition effect.

[0055] In some embodiments, the two first touch signal terminal binding areas are symmetrical. The first touch signal terminal binding area bound to the display panel is bound to the display panel symmetrically on both sides of the edge of the display panel, and accordingly, the terminals bound to the display panel and the first touch signal terminal are also symmetrically arranged, which is beneficial to reducing the size of the display panel frame area.

[0056] In addition, since the flexible circuit board provided in the embodiment of the present disclosure does not need to avoid other flexible circuit boards, the color temperature sensor is also located between the two first touch signal terminal binding areas, and the shape of the flexible circuit board can also be set to a symmetrical shape, that is, the flexible substrate has a symmetry axis parallel to the first direction. This avoids the risk of edge breakage caused by the special-shaped design of the flexible substrate.

[0057] In some embodiments, Figure 2 As shown, the second binding area 702 includes: a first sub-area 7021 and a second sub-area 7022 arranged in the second direction X and disconnected from each other;

[0058] The first sub-region 7021 only includes a plurality of second touch signal terminals 802 arranged along the second direction X;

[0059] The second sub-region 7022 includes a plurality of second touch signal terminals 802 and a plurality of second color temperature signal terminals 804 arranged along the second direction X. In the second direction X, the plurality of second color temperature signal terminals 804 are located on one side of the plurality of second touch signal terminals 802 .

[0060] That is, in the flexible circuit board provided by the embodiment of the present disclosure, multiple second touch signal terminals are centrally arranged, and multiple second color temperature signal terminals are centrally arranged, so that when the structures for transmitting color temperature signals and touch signals are integrated on the same flexible substrate, the wiring difficulty can be reduced.

[0061] In some embodiments, Figure 2 As shown, in the second direction X, in the second sub-area 7022, the plurality of second color temperature signal terminals 804 are located on the side of the plurality of second touch signal terminals 802 away from the first sub-area 7021. That is, in the entire second binding area 702, the plurality of second color temperature signal terminals 804 are located on one side of the plurality of second touch signal terminals 802.

[0062] In the flexible circuit board provided by the embodiment of the present disclosure, while multiple second touch signal terminals are centrally arranged and multiple second color temperature signal terminals are centrally arranged, multiple second color temperature signal terminals in the entire second binding area are located on one side of the multiple second touch signal terminals, thereby simplifying the wiring difficulty of the mainboard bound to the second binding area of ​​the flexible circuit board.

[0063] In some embodiments, Figure 3 As shown, the routing layer 8 specifically includes: a first conductive layer 10, and a second conductive layer 11 located on a side of the first conductive layer 10 away from the flexible substrate 7;

[0064] like Figure 2 As shown, the connection area 703 includes a first overlapping area 7031; in the first overlapping area 7031, the orthographic projections of the plurality of touch signal traces 805 and the plurality of color temperature signal traces 806 on the flexible substrate 7 overlap;

[0065] In the first overlapping area, Figure 3 As shown, the plurality of touch signal traces 805 are located in one of the first conductive layer 10 and the second conductive layer 11, and the plurality of color temperature signal traces 806 are located in one of the first conductive layer 10 and the second conductive layer 11 and are in a different layer from the plurality of touch signal traces 805;

[0066] In the first overlapping region, the first conductive layer 10 is insulated from the second conductive layer 11 .

[0067] Therefore, it can be achieved that the touch signal routing and the color temperature signal routing do not interfere with each other in the first overlapping area.

[0068] It should be noted that Figure 3 In the example, the touch signal line 805 is located in the first conductive layer 10 and the color temperature signal line 806 is located in the second conductive layer 11. Of course, in the specific implementation, the touch signal line can also be located in the second conductive layer and the color temperature signal line can be located in the first conductive layer.

[0069] In some embodiments, in the area outside the first overlapping area, the touch signal routing line includes: a first sub-routing line located in the first conductive layer, and a second sub-routing line located in the second conductive layer and electrically connected to the first sub-routing line;

[0070] The color temperature signal routing line includes: a third sub-routing line located in the first conductive layer, and a fourth sub-routing line located in the second conductive layer and electrically connected to the third sub-routing line.

[0071] That is, the flexible circuit board provided in the embodiment of the present disclosure adopts double-layer wiring for touch signal routing and color temperature signal routing in most areas, and single-layer wiring in the area where the two overlap, which is beneficial to reducing the resistance of the touch signal routing and color temperature signal routing.

[0072] In a specific implementation, in the first overlapping area, the touch signal routing may include only the first sub-routing and the color temperature signal routing may include only the fourth sub-routing, or the touch signal routing may include only the second sub-routing and the color temperature signal routing may include only the third sub-routing.

[0073] In some embodiments, Figure 3 As shown, the flexible circuit board also includes: a first insulating layer 15 located between the first conductive layer 10 and the second conductive layer 11, a second insulating layer 16 located on the side of the second conductive layer 11 away from the flexible substrate 7, a first adhesive layer 17 located between the first conductive layer 10 and the flexible substrate 7, and a second adhesive layer 18 located between the second conductive layer 11 and the second insulating layer 16.

[0074] In a specific implementation, the second sub-route is electrically connected to the first sub-route through a first via hole penetrating the first insulating layer. In each touch signal route, multiple first via holes can be set, and the positions of the first via holes are set according to actual needs. The fourth sub-route is electrically connected to the third sub-route through a second via hole penetrating the first insulating layer. In each color temperature signal route, multiple second via holes can be set, and the positions of the second via holes are set according to actual needs.

[0075] In a specific implementation, in a region where the first conductive layer and the second conductive layer do not need to be electrically connected, the first conductive layer and the second conductive layer are insulated by a first insulating layer.

[0076] In some embodiments, Figure 4 As shown, the first color temperature signal end 803 includes: a first sublayer 8031 ​​located in the first conductive layer 10, and a second sublayer 8032 located in the second conductive layer 11 and electrically connected to the first sublayer 8031;

[0077] The second insulating layer 16 and the second bonding layer 18 have a first opening 19 exposing the second sub-layer 8032 , and the color temperature sensor 9 is electrically connected to the second sub-layer 8032 in the first opening 19 ;

[0078] The flexible circuit board further includes a welding material layer 20 located between the first color temperature signal terminal 803 and the color temperature sensor 9 .

[0079] In a specific implementation, the material of the welding material layer is, for example, solder paste.

[0080] In a specific implementation, the second sub-layer is electrically connected to the first sub-layer through a third via hole penetrating the first insulating layer.

[0081] In specific implementation, Figure 4 As shown, the first sub-layer 8031 ​​is integrally connected to the third sub-route 8061 , and the second sub-layer 8032 is integrally connected to the fourth sub-route 8062 .

[0082] In some embodiments, Figure 2 As shown, the first color temperature signal end binding area 7011 includes: a third sub-area 70111, and a fourth sub-area 70112 located between the third sub-area 70111 and the connection area 703;

[0083] like Figure 5 As shown, the fourth sub-region 70112 only includes the flexible substrate 7, the first adhesive layer 17, the first conductive layer 10 and the first insulating layer 15. That is, the fourth sub-region only includes one conductive layer, and the color temperature signal routing passing through the second sub-region only includes the third sub-routing.

[0084] In some embodiments, Figure 2 As shown, the contour of the connection area 703 on the side close to the first binding area 701 has a first recessed area 13 ; the first color temperature signal end binding area 7011 is located in the first recessed area 13 .

[0085] like Figure 6 As shown, the fourth sub-region 70112 is bent along a bending axis parallel to the second direction X, so that the third sub-region 70111 is located on a side 704 of the connection area 703 away from the wiring layer 8.

[0086] In the flexible circuit board provided by the embodiment of the present disclosure, the first color temperature signal terminal binding area is located in the first recessed area, so that the color temperature sensor is also located in the first recessed area. Except for the second sub-area connected to the connection area, the remaining edges of the first color temperature signal terminal binding area are disconnected from the connection area, so that the first color temperature signal terminal binding area is conveniently bent to the back of the flexible substrate, so that the color temperature sensor is pre-fixed to the back of the flexible substrate through the first color temperature signal terminal binding area. When the first touch signal end of the flexible circuit board is bound to the display panel, the first color temperature signal terminal binding area is avoided to cause interference. After the first touch signal end of the flexible circuit board is bound to the display panel, the first color temperature signal terminal binding area can be separated from the flexible substrate, and the second sub-area is bent back to the original position, so that the color temperature sensor is attached to the display panel. The second sub-area includes a flexible substrate, a single-layer conductive layer, a first adhesive layer, and a first insulating layer, and the second conductive layer, the second adhesive layer, and the second insulating layer are removed, so as to facilitate bending.

[0087] In some embodiments, Figure 2 As shown, the contour of the connection area 703 near the second binding area 702 has a second recessed area 14 ; the first sub-area 7021 and the second sub-area 7022 are located on both sides of the second recessed area 14 in the second direction X, respectively.

[0088] The material of the first conductive layer and the second conductive layer includes copper;

[0089] The material of the flexible substrate, the first insulating layer and the second insulating layer includes polyimide.

[0090] The present disclosure provides a display device, such as Figure 7 As shown, the display device includes: a display panel 23, a flexible circuit board 24 provided in an embodiment of the present disclosure, and a main board 6;

[0091] The first binding area 701 of the flexible circuit board 24 is bound to the display panel 23 , and the second binding area 702 of the flexible circuit board 24 is bound to the main board 6 .

[0092] In a specific implementation, the mainboard includes a touch signal processing module and a color temperature signal processing module, the touch signal processing module is used to receive and process the signal transmitted by the second touch signal terminal, and the color temperature signal processing module is used to receive and process the signal transmitted by the second color temperature signal terminal. The display device also includes a flexible circuit board for transmitting display signals that is bound to the display panel and the mainboard.

[0093] In a specific implementation, the display panel is a touch display panel, and the display panel can be an electroluminescent display panel, a liquid crystal display panel, etc.

[0094] An embodiment of the present disclosure provides a vehicle, and the vehicle includes the display device provided by the embodiment of the present disclosure.

[0095] In a specific implementation, the display device is, for example, a windshield, a car window, a sunroof, etc.

[0096] In summary, the flexible circuit board, display device, and vehicle provided by the embodiments of the present disclosure include a color temperature sensor, a first color temperature signal terminal, a color temperature signal routing, a second color temperature signal terminal, a first touch signal terminal, a touch signal routing, and a second touch signal terminal, that is, the flexible circuit board can transmit color temperature signals and touch signals, and the structures for transmitting color temperature signals and touch signals are integrated on the same flexible substrate. When the display panel needs to use a flexible circuit board to transmit color temperature signals and touch signals to the main board, there is no need to set two flexible circuit boards for transmitting color temperature signals and touch signals respectively, which can simplify the process flow and save costs. In addition, since there is no need to set two flexible circuit boards for transmitting color temperature signals and touch signals respectively, there is no problem of the risk of tearing of one of the flexible circuit boards due to the avoidance of the two flexible circuit boards, thereby ensuring the yield of the flexible circuit board. Although the preferred embodiments of the present invention have been described, once the technicians in this field know the basic creative concept, they can make additional changes and modifications to these embodiments. Therefore, the attached claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0097] Obviously, those skilled in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is also intended to include these modifications and variations.

Claims

1. A flexible circuit board, characterized in that: The flexible circuit board comprises: a flexible substrate, a wiring layer located on one side of the flexible substrate, and a color temperature sensor located on a side of the wiring layer away from the flexible substrate; The flexible substrate comprises: a first binding area and a second binding area opposite to each other in a first direction, and a connection area between the first binding area and the second binding area; The routing layer includes: a plurality of first touch signal terminals and a plurality of first color temperature signal terminals located in the first binding area, a plurality of second touch signal terminals and a plurality of second color temperature signal terminals located in the second binding area, and a plurality of touch signal routing lines and a plurality of color temperature signal routing lines passing through the connection area and extending to the first binding area and the second binding area; Two ends of each of the touch signal wirings are electrically connected to the first touch signal terminal and the second touch signal terminal respectively; two ends of each of the color temperature signal wirings are electrically connected to the first color temperature signal terminal and the second color temperature signal terminal respectively; The color temperature sensor is electrically connected to the plurality of first color temperature signal terminals.

2. The flexible circuit board according to claim 1, characterized in that: The first binding area includes: a first color temperature signal end binding area, and two first touch signal end binding areas respectively located on both sides of the first color temperature signal end binding area in a second direction; the second direction intersects the first direction; The first touch signal terminal binding area and the first color temperature signal terminal binding area are disconnected from each other.

3. The flexible circuit board according to claim 2, characterized in that: The second binding area includes: a first sub-area and a second sub-area arranged in the second direction and disconnected from each other; The first sub-area only includes a plurality of the second touch signal terminals arranged along the second direction; The second sub-region includes a plurality of second touch signal terminals and a plurality of second color temperature signal terminals arranged along the second direction; in the second direction, the plurality of second color temperature signal terminals are located on a side of the plurality of second touch signal terminals away from the first sub-region.

4. The flexible circuit board according to claim 3, characterized in that: The routing layer includes: a first conductive layer, and a second conductive layer located on a side of the first conductive layer away from the flexible substrate; The connection area includes a first overlapping area, in which the orthographic projections of the plurality of touch signal lines and the plurality of color temperature signal lines on the flexible substrate overlap; In the first overlapping area, the plurality of touch signal lines are located in one of the first conductive layer and the second conductive layer, and the plurality of color temperature signal lines are located in one of the first conductive layer and the second conductive layer and are in a different layer from the plurality of touch signal lines; In the first overlapping region, the first conductive layer is insulated from the second conductive layer; In the area outside the first overlapping area, the touch signal routing line includes: a first sub-routing line located in the first conductive layer, and a second sub-routing line located in the second conductive layer and electrically connected to the first sub-routing line; The color temperature signal routing line includes: a third sub-routing line located in the first conductive layer, and a fourth sub-routing line located in the second conductive layer and electrically connected to the third sub-routing line.

5. The flexible circuit board according to claim 4, characterized in that: The flexible circuit board also includes: a first insulating layer located between the first conductive layer and the second conductive layer, a second insulating layer located on a side of the second conductive layer away from the flexible substrate, a first adhesive layer located between the first conductive layer and the flexible substrate, and a second adhesive layer located between the second conductive layer and the second insulating layer.

6. The flexible circuit board according to claim 5, characterized in that: The first color temperature signal end includes: a first sublayer located in the first conductive layer, and a second sublayer located in the second conductive layer; The second insulating layer and the second bonding layer have a first opening exposing the second sub-layer, and the color temperature sensor is electrically connected to the second sub-layer in the first opening; The flexible circuit board also includes a welding material layer located between the first color temperature signal terminal and the color temperature sensor.

7. The flexible circuit board according to claim 6, characterized in that: The first color temperature signal terminal binding area includes: a third sub-area, and a fourth sub-area located between the third sub-area and the connection area; The fourth sub-region includes only the flexible substrate, the first adhesive layer, the first conductive layer, and the first insulating layer.

8. The flexible circuit board according to claim 7, characterized in that: The contour of the connection area on one side close to the first binding area has a first concave area; the first color temperature signal terminal binding area is located in the first concave area; The fourth sub-region is bent along a bending axis parallel to the second direction, so that the third sub-region is located at a side of the connection area away from the routing layer.

9. A display device, characterized in that: The display device comprises: a display panel, a flexible circuit board according to any one of claims 1 to 8, and a main board; The first binding area of ​​the flexible circuit board is bound to the display panel, and the second binding area of ​​the flexible circuit board is bound to the main board.

10. A vehicle, characterized in that: The vehicle comprises the display device according to claim 9.

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