Greeting lamp and control circuit thereof

Abstract

The utility model discloses a welcome lamp and a control circuit thereof. Comprising a first controller which is in communication connection with an external controller; the first controller is in communication connection with an external controller through the first transceiver and is used for receiving display data sent by the external controller; the second controller is in communication connection with the first controller; at least one second transceiver and at least one third transceiver, the first controller is in communication connection with the second controller through the second transceiver and the third transceiver, the third transceiver is used for receiving display data sent by the second transceiver, and the second transceiver and the third transceiver are in one-to-one correspondence; and the first controller and the at least one second controller are also used for controlling the corresponding lamp panel to display according to the display data. According to the control circuit of the welcome lamp, when the frame of the second controller drops and data needs to be sent again, data receiving of other controllers is not affected, and it is guaranteed that display of the lamp panel is not blocked to a certain extent.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a control circuit of a welcome light and a welcome light. Background Art

[0002] With the rapid development of electric vehicles, the automotive industry is increasingly moving towards intelligence, electronics, and digitalization, and many car designs have also ushered in major reforms. In recent years, the use of car lights has become more and more extensive, with increasingly complex functions. Matrix headlights are often installed on the exterior of vehicles.

[0003] On some vehicles, the exterior matrix headlights serve as front hood welcome lights. These lights, comprised of nearly 10,000 LEDs, are connected to an external controller via CANFD (Controller Area Network Flexible Data-rate). The external controller transmits video, which is then displayed by the front hood welcome lights. The primary reason for using CANFD transmission is cost advantages, which are over 50% lower than LVDS transmission costs and enable 100% localization of chips. However, there are also drawbacks. CANFD has a maximum transmission rate of only 5Mbps, and the data volume of 10,000 LEDs is substantial, placing a high load on the transmission bus. This can easily cause frame drops and lag in the matrix video of the front hood welcome lights. Utility Model Content

[0004] The present invention aims to at least partially address one of the technical problems in the related art. To this end, the first object of the present invention is to provide a welcome light control circuit, comprising: a first controller, the first controller being communicatively connected to an external controller; a first transceiver, the first controller being communicatively connected to the external controller via the first transceiver and configured to receive display data sent by the external controller; at least one second controller, the second controller being communicatively connected to the first controller; at least one second transceiver and at least one third transceiver, the first controller being communicatively connected to the second controller via the second transceiver and the third transceiver, the third transceiver being configured to receive display data sent by the second transceiver, wherein the second transceiver and the third transceiver have a one-to-one correspondence; the first controller and the at least one second controller are further configured to control the display of corresponding light panels based on the display data. Thus, the welcome light control circuit of the present application effectively addresses the problem that, when the total CANFD network load rate is too high, when any controller experiences frame drops and needs to resend data, this affects data reception by other controllers, resulting in display delays and ultimately a poor user experience.

[0005] The second purpose of the present invention is to provide a welcome lamp.

[0006] To achieve the above-mentioned objectives, the first embodiment of the present invention proposes a control circuit for a welcome light, comprising: a first controller, the first controller being communicatively connected to an external controller; a first transceiver, the first controller being communicatively connected to the external controller through the first transceiver, and being used to receive display data sent by the external controller; at least one second controller, the second controller being communicatively connected to the first controller; at least one second transceiver and at least one third transceiver, the first controller being communicatively connected to the second controller through the second transceiver and the third transceiver, the third transceiver being used to receive display data sent by the second transceiver, wherein the second transceiver and the third transceiver correspond one-to-one; the first controller and at least one second controller are also used to control the corresponding light board display according to the display data.

[0007] Specifically, the first transceiver, the at least one second transceiver and the at least one third transceiver are CAN FD transceivers.

[0008] Specifically, the first transceiver and / or at least one second transceiver are integrated with the first controller, and the third transceiver is integrated with the corresponding second controller.

[0009] Specifically, the first transceiver and / or at least one second transceiver is connected to the first controller via a wired or wireless manner, and the third transceiver is connected to the corresponding second controller via a wired or wireless manner.

[0010] Specifically, the first controller and the at least one second controller communicate with the corresponding light board via SPI.

[0011] Specifically, the first controller is further used to parse the display data sent by the external controller, and send the parsed data to at least one second controller and / or the light board corresponding to the first controller.

[0012] Specifically, the first controller is further configured to, when parsing of the display data sent by the external controller fails, send a resend request to the external controller via the first transceiver.

[0013] Specifically, the at least one second controller is further configured to, when parsing of the display data sent by the first controller fails, send a retransmission request to the first controller via the corresponding third transceiver and the second transceiver.

[0014] To achieve the above-mentioned object, a second embodiment of the present invention provides a welcome light, comprising the aforementioned control circuit of the welcome light and at least one light board.

[0015] Specifically, each controller corresponds to a light board. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1This is a schematic structural diagram of an original design welcome light according to some embodiments of the present application;

[0017] Figure 2 This is a schematic structural diagram of a control circuit for a welcome light according to some embodiments of the present application;

[0018] Figure 3 This is a schematic structural diagram of a welcome light according to some embodiments of the present application;

[0019] Figure 4 Schematic diagram of the structure of the welcome light according to other embodiments of the present application. DETAILED DESCRIPTION

[0020] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0021] The welcome lamp and its control circuit according to the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0022] In some embodiments, a related art welcome light may include multiple controllers, each equipped with a transceiver. For example, the transceiver may be integrated into the corresponding controller. All transceivers are connected to a CANFD network, which is also connected to an external controller. Each controller communicates with the external controller via a corresponding transceiver, and each controller also corresponds to a light board. In other words, the external controller transmits display data to the welcome light controller via a CANFD bus, and each controller transmits the received display data to the corresponding light board for display.

[0023] For example, refer to Figure 1For example, a welcome light in the related art includes three controllers. Specifically, the welcome light includes controller 1, controller 2, and controller 3. The external controller can transmit display data to controller 1 via transceiver 1, and controller 1 then transmits the display data to the corresponding light board 1 for display. The external controller can transmit display data to controller 2 via transceiver 2, and controller 2 then transmits the display data to the corresponding light board 2 for display. The external controller can transmit display data to controller 3 via transceiver 3, and controller 3 then transmits the display data to the corresponding light board 3 for display. However, since all transceivers are connected to a CANFD network, if any one of the three controllers loses a frame, data retransmission will be performed in accordance with the CANFD standard. The entire CANFD network will wait for the controller with the frame loss to receive the retransmitted data, and the other two controllers without the problem will be affected and will not receive data, thus affecting the display effect and causing the display to be stuck and not smooth.

[0024] Based on this, refer to Figure 2 The control circuit of the welcome light in the embodiment of the present application may include: a first controller, a first transceiver, at least one second controller, at least one second transceiver, and at least one third transceiver. The first controller is communicatively connected to an external controller; the first controller is communicatively connected to the external controller via the first transceiver and is configured to receive display data sent by the external controller; the second controller is communicatively connected to the first controller; the first controller is communicatively connected to the second controller via the second transceiver and the third transceiver, and the third transceiver is configured to receive display data sent by the second transceiver, wherein the second transceiver corresponds to the third transceiver in a one-to-one manner; the first controller and the at least one second controller are further configured to control the display of the corresponding light panel according to the display data.

[0025] In the embodiments of the present application, for ease of explanation, the control circuit of the welcome light includes two second controllers as an example, but this is not intended to limit the present application.

[0026] Specifically, refer to Figure 3The first controller is communicatively connected to the external controller via the first transceiver, and is used to receive display data sent by the external controller. That is, the external controller sends display data to the first controller via the CANFD main network, and the first controller is also used to control the corresponding light board display according to the display data. The first controller is communicatively connected to the second controller 1 via the second transceiver 1 and the third transceiver 1. The third transceiver 1 is used to receive the display data sent by the second transceiver 1, and the second controller 1 will control the corresponding light board display according to the display data received by the third transceiver 1. The first controller is communicatively connected to the second controller 2 via the second transceiver 2 and the third transceiver 2. The third transceiver 2 is used to receive the display data sent by the second transceiver 2, and the second controller 2 will control the corresponding light board display according to the display data received by the third transceiver 2.

[0027] For example, the external controller transmits all display data to the first controller through the CANFD main network. After parsing, the first controller sends the display data to the second controller 1 through the second transceiver 1 and the third transceiver 1, and then to the second controller 2 through the second transceiver 2 and the third transceiver 2. If a retransmission problem occurs in the second controller 1, the first controller can resend the display data to the second controller 1 through the second transceiver 1 and the third transceiver 1, without the need for the external controller to resend it through the CANFD bus. Therefore, the first controller and the second controller 2 will not be affected. Similarly, if a retransmission problem occurs in the second controller 2, the first controller can resend the display data to the second controller 2 through the second transceiver 2 and the third transceiver 2, without the need for the external controller to resend it through the CANFD bus. Therefore, the first controller and the second controller 1 will not be affected. In this way, when the data of the second controller needs to be resent, there is no need to control the external controller and the CANFD total network to resend the data. It is only necessary to control the first controller to resend the data. The entire CANFD network does not need to wait for the second controller with lost frames to receive the resent data. To a certain extent, it ensures that the light board display is not stuck and improves the display effect of the welcome light.

[0028] The control circuit of the welcome light of the present application effectively solves the problem that when the total CANFD network load rate is too high, any controller has frame drops and needs to resend data, which affects the data reception of other controllers, resulting in display delay and ultimately affecting the user experience.

[0029] In some embodiments, the first transceiver, the at least one second transceiver, and the at least one third transceiver are CAN FD transceivers.

[0030] Specifically, refer to Figure 3, the first transceiver is a CANFD transceiver, the second transceiver 1 and the second transceiver 2 are also CANFD transceivers, and the third transceiver 1 and the third transceiver 2 are also CANFD transceivers. In other words, the first controller sends display data to the second controller 1 via CANFD subnetwork 1, and the first controller sends display data to the second controller 2 via CANFD subnetwork 2. This optimizes the overall CANFD network into one CANFD overall network and two CANFD subnetworks. The data volume of each subnetwork is reduced to only one-third of the previous volume. Even if retransmission issues arise, they can be quickly resent without affecting the display quality.

[0031] In some embodiments, the first transceiver and / or at least one second transceiver are integrated with the first controller, and the third transceiver is integrated with the corresponding second controller.

[0032] In some embodiments, the first transceiver and / or at least one second transceiver is connected to the first controller via a wired or wireless manner, and the third transceiver is connected to the corresponding second controller via a wired or wireless manner.

[0033] Specifically, the first transceiver may be integrated with the first controller, or the at least one second transceiver may be integrated with the first controller, or both the first transceiver and the at least one second transceiver may be integrated with the first controller. The first transceiver may be connected to the first controller via a wired or wireless manner, or the at least one second transceiver may be connected to the first controller via a wired or wireless manner, or both the first transceiver and the at least one second transceiver may be connected to the first controller via a wired or wireless manner.

[0034] In an embodiment of the present application, an example is used in which a first transceiver and at least one second transceiver are integrated with a first controller, a third transceiver is integrated with a corresponding second controller, the first transceiver and at least one second transceiver are connected to the first controller via a wired or wireless manner, and the third transceiver is connected to the corresponding second controller via a wired or wireless manner, but this is not intended to limit the present application.

[0035] For example, refer to Figure 3 The first transceiver, the second transceiver 1, and the second transceiver 2 are integrated with the first controller, the third transceiver 1 is integrated with the second controller 1, and the third transceiver 2 is integrated with the second controller 2. The first transceiver is connected to the first controller via a wired or wireless manner, the second transceiver 1 and the second transceiver 2 are connected to the first controller via a wired or wireless manner, the third transceiver 1 is connected to the second controller 1 via a wired or wireless manner, and the third transceiver 2 is connected to the second controller 2 via a wired or wireless manner.

[0036] In some embodiments, the first controller and the at least one second controller communicate with the corresponding light board via SPI.

[0037] For example, continue to refer to Figure 3 , light board 1 receives the display data sent by the second controller 1 through the corresponding SPI (Serial Peripheral Interface), light board 2 receives the display data sent by the first controller through the corresponding SPI, and light board 3 receives the display data sent by the second controller 2 through the corresponding SPI.

[0038] In some embodiments, the first controller is further configured to parse display data sent by an external controller, and send the parsed data to at least one second controller and / or a light board corresponding to the first controller.

[0039] Specifically, after receiving the display data sent by the external controller, the first controller parses the display data and sends the parsed data to the light board corresponding to at least one second controller, or the light board corresponding to the first controller, or the light board corresponding to at least one second controller and the first controller according to demand.

[0040] For example, refer to Figure 3 , assuming that the first controller parses the display data into display data 1, display data 2 and display data 3, the first controller sends display data 1 to the light board 1 corresponding to the second controller 1, the first controller sends display data 2 to the light board 2 corresponding to the first controller, and the first controller sends display data 3 to the light board 3 corresponding to the second controller 2.

[0041] In some embodiments, the first controller is further configured to, when parsing of the display data sent by the external controller fails, send a resend request to the external controller via the first transceiver.

[0042] Specifically, if the first controller fails to parse the display data sent by the external controller or parses incorrectly, it will send a resend request to the external controller through the first transceiver. At this time, the light board corresponding to at least one second controller and the first controller will not display.

[0043] In some embodiments, the at least one second controller is further configured to, when parsing of the display data sent by the first controller fails, send a retransmission request to the first controller via the corresponding third transceiver and the second transceiver.

[0044] For example, refer to Figure 3Assume that the first controller sends display data 1 to the second controller 1 and display data 3 to the second controller 2. If the second controller 1 fails to parse the display data 1 sent by the first controller, it will send a retransmission request to the first controller via the third transceiver 1 and the second transceiver 1. The first controller will retransmit the display data 1 to the second controller 1. In this way, the first controller and the second controller 2 will not be affected. Similarly, if the second controller 2 fails to parse the display data 3 sent by the first controller, it will send a retransmission request to the first controller via the third transceiver 2 and the second transceiver 2. The first controller will retransmit the display data 3 to the second controller 2. In this way, the first controller and the second controller 1 will not be affected.

[0045] In this way, when the data of the second controller needs to be resent, there is no need to control the external controller and the CANFD total network to resend the data. It is only necessary to control the first controller to resend the data. The entire CANFD network does not need to wait for the second controller with lost frames to receive the resent data. To a certain extent, it ensures that the light board display is not stuck and improves the display effect of the welcome light.

[0046] The utility model also provides a welcome lamp.

[0047] Reference Figure 4 The welcome light of the present application includes the aforementioned welcome light control circuit and at least one light board.

[0048] In some embodiments, each controller corresponds to one light board.

[0049] For example, continue to refer to Figure 3 , the second controller 1 corresponds to light board 1, the first controller corresponds to light board 2, and the second controller 2 corresponds to light board 3.

[0050] In summary, the welcome light control circuit of this application optimizes a CANFD network into a single CANFD network and at least one CANFD sub-network. This effectively solves the problem of excessively high CANFD network load, where if any controller experiences frame drops and needs to resend data, data reception by other controllers is affected, leading to display delays and ultimately a negative impact on the user experience. This ensures low costs and localization, while effectively reducing bus load and ensuring smoother video.

[0051] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0053] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0054] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A control circuit for a welcome light, characterized in that: include: a first controller, the first controller being communicatively connected to an external controller; a first transceiver, wherein the first controller is communicatively connected to the external controller via the first transceiver and is configured to receive display data sent by the external controller; at least one second controller, the second controller being communicatively connected to the first controller; at least one second transceiver and at least one third transceiver, the first controller being communicatively connected to the second controller via the second transceiver and the third transceiver, the third transceiver being configured to receive display data sent by the second transceiver, wherein the second transceiver and the third transceiver have a one-to-one correspondence; The first controller and at least one of the second controllers are further configured to control corresponding light board displays according to the display data.

2. The control circuit of the welcome light according to claim 1, characterized in that: The first transceiver, at least one of the second transceiver, and at least one of the third transceiver are CAN FD transceivers.

3. The control circuit of the welcome light according to claim 1, characterized in that: The first transceiver and / or at least one of the second transceivers are integrated with the first controller, and the third transceiver is integrated with the corresponding second controller.

4. The control circuit of the welcome light according to claim 1, characterized in that: The first transceiver and / or at least one of the second transceivers is connected to the first controller via a wired or wireless manner, and the third transceiver is connected to the corresponding second controller via a wired or wireless manner.

5. The control circuit of the welcome light according to claim 1, characterized in that: The first controller and at least one of the second controllers communicate with the corresponding light board via SPI.

6. The control circuit of the welcome light according to claim 1, characterized in that: The first controller is further configured to parse the display data sent by the external controller, and send the parsed data to at least one of the second controllers and / or a light board corresponding to the first controller.

7. The control circuit of the welcome light according to claim 6, characterized in that: The first controller is further configured to, when parsing of the display data sent by the external controller fails, send a resend request to the external controller via the first transceiver.

8. The control circuit of the welcome light according to claim 6, characterized in that: At least one of the second controllers is further configured to, when parsing of the display data sent by the first controller fails, send a retransmission request to the first controller via the corresponding third transceiver and the second transceiver.

9. A welcome light, characterized in that: The welcome light comprises a control circuit and at least one light board according to any one of claims 1 to 8.

10. The welcome light according to claim 9, characterized in that: Each controller corresponds to one light board.

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