Key indication device, streaming rearview mirror and vehicle

Abstract

The application relates to a key indication device, a streaming mirror and a vehicle, and belongs to the technical field of vehicle rearview mirrors. The key indication device comprises an ambient brightness sensor arranged on a housing of the rearview mirror and having a photosensitive part exposed at least partially, which is used for detecting and outputting ambient light brightness; an infrared sensor arranged in a region adjacent to a physical key of the rearview mirror housing, which is used for detecting a target object in a detection range and outputting an infrared level signal; a backlight module arranged in a key cap of the physical key of the rearview mirror and electrically connected with a controller; and the controller is arranged in the housing of the rearview mirror and electrically connected with the ambient brightness sensor, the infrared sensor and the backlight module respectively. The controller receives the ambient light brightness, outputs an infrared driving signal to the infrared sensor, and receives the infrared level signal and outputs a backlight driving signal to the backlight module.

Description

Technical Field

[0001] This application relates to the technical field of vehicle rearview mirrors, and more particularly to a button indicator device, a streaming media rearview mirror, and a vehicle. Background Technology

[0002] With the development of automotive electrification and intelligence, traditional optical rearview mirrors are gradually being replaced by streaming rearview mirrors. Streaming rearview mirrors use cameras to capture images of the area behind the vehicle and display them on a mirror screen, providing the driver with a wider and clearer field of vision. To enable operation of rearview mirror functions such as brightness adjustment, viewing angle switching, and menu control, physical buttons are usually provided on the mirror body or frame.

[0003] To facilitate drivers' identification and operation of these buttons in low-light conditions, existing technologies mainly employ the following methods.

[0004] On the one hand, adding backlights inside the keycaps helps drivers identify the key positions and definitions. While this directly illuminates the keys, continuous backlighting at night or in low-light conditions can cause glare interference with the driver's forward vision, affecting driving safety. If a delayed-off strategy is adopted, although it can reduce interference from constant illumination, the driver still faces the problem of unclear key positions and having to blindly search for them when they need to operate the keys again.

[0005] On the other hand, virtual prompt icons are permanently displayed at the corresponding button locations within the screen display area of ​​the streaming rearview mirror. While this solution can indicate the button locations, the constantly displayed virtual icons occupy screen display area, obstructing or interfering with the rear view displayed in the rearview mirror and affecting the driver's observation. Summary of the Invention

[0006] This application addresses, to at least some extent, one of the technical problems in the related art.

[0007] Therefore, this application aims to provide a button indicator device, a streaming rearview mirror, and a vehicle.

[0008] To achieve the above objectives, in a first aspect, this application provides a button indicator device, comprising: An ambient light sensor is installed on the housing of the rearview mirror, with at least part of its photosensitive part exposed, for detecting and outputting ambient light brightness; An infrared sensor is located near the physical buttons on the rearview mirror housing and is used to detect target objects within the detection range and output infrared level signals. The backlight module is located inside the keycap of the physical button on the rearview mirror and is electrically connected to the controller. The controller is housed within the rearview mirror housing and is electrically connected to the ambient light sensor, the infrared sensor, and the backlight module, respectively. in, The controller receives the ambient light intensity and outputs an infrared drive signal to the infrared sensor; and The controller receives the infrared level signal and outputs a backlight driving signal to the backlight module.

[0009] In this technical solution, the collaborative operation of an ambient light sensor and an infrared sensor enables intelligent on-demand triggering of button indications. The indications are automatically activated only when the ambient light is insufficient and the hand is close to the operating area. This fundamentally solves the problem of difficult button location identification and blind operation in dark environments. At the same time, it completely avoids the continuous interference to the driver's forward vision and the content displayed on the rearview mirror screen caused by constantly lit indicator lights or constantly displayed virtual icons in traditional solutions. This significantly improves driving safety, visual comfort, and human-computer interaction experience.

[0010] In some embodiments of this application, the infrared sensor includes: Infrared emitter, used to emit infrared light; An infrared receiver is arranged side by side with the infrared transmitter, and the sensing end of the infrared receiver faces the same direction as the emitting end of the infrared transmitter. The infrared receiver is used to receive infrared light reflected back by a nearby object and convert the reflected light signal into an infrared level signal, which is then transmitted to the controller.

[0011] In the technical solution, a reflective sensing structure consisting of an infrared transmitter and infrared receivers arranged side by side in the same direction is used to achieve non-contact detection of the hand entering the preset detection area: the emitted infrared light is captured by the receiver after being diffusely reflected by the hand, processed by the internal circuit and converted into a clear infrared level signal and transmitted to the controller, thereby providing a reliable and accurate triggering basis for the controller's intelligent decision-making.

[0012] In some embodiments of this application, the controller includes: The first signal input terminal is electrically connected to the ambient brightness sensor and is used to receive the ambient brightness signal; The first control output terminal is electrically connected to the infrared sensor and is used to output a high-level or low-level infrared drive signal to the infrared sensor. The second signal input terminal is electrically connected to the infrared sensor and is used to receive the infrared level signal; The second control output terminal is electrically connected to the backlight module and is used to output a backlight driving signal.

[0013] In this technical solution, the controller determines the ambient light brightness by receiving an ambient brightness signal at the first signal input terminal, and outputs a high-level infrared drive signal to the infrared sensor via the first control output terminal to turn the infrared sensor on or off. When the infrared sensor is on, if the controller receives an infrared level signal through the second signal input terminal, it determines that a hand is approaching, and then outputs a backlight drive signal to the backlight module via the second control output terminal to drive the button backlight to illuminate. This technical solution, through the specific interface configured in the controller and its clear connection relationships and judgment logic, enables the button indicator device to accurately achieve the intelligent judgment and execution process of "sensing light first, then sensing, and then illuminating," thus linking the two conditions of "dark environment" and "hand approaching" as the necessary and sufficient conditions for triggering the button backlight indication. This ensures the consistency and reliability of the response, avoids energy waste and potential visual interference caused by false triggering or unnecessary operation in bright environments, and fundamentally optimizes power consumption management and driving safety.

[0014] In some embodiments of this application, it further includes: The display module is located in the display area of ​​the rearview mirror and is electrically connected to the controller; The controller receives the infrared level signal and outputs a display drive signal to the display module.

[0015] In this technical solution, by adding a display module electrically connected to the controller, when a hand approaches a physical button in a dark environment, the controller can control the display module to display a virtual button icon at the screen position corresponding to the physical button based on the received infrared level signal. This provides intuitive and accurate button location guidance without relying on physical backlighting. This technical solution not only avoids the light interference problems that may be caused by traditional backlighting solutions, but also solves the problem of virtual icons obstructing and visually interfering with core screen content, such as background images, due to their persistent display. It achieves dynamic invocation of the indicator function and intelligent utilization of screen space, further improving the flexibility of human-computer interaction and the cleanliness of the display interface.

[0016] In some embodiments of this application, the display module includes: The display screen is located inside the rearview mirror housing, behind the rearview mirror surface, and is electrically connected to the controller. A semi-transparent, semi-reflective mirror layer is disposed between the display screen and the rearview mirror.

[0017] In this technical solution, the display module achieves intelligent switching between two states: a regular mirror and an information display screen, by stacking the display screen, a semi-transparent mirror layer, and the rearview mirror in a specific order. When the display screen is not in display mode, the semi-transparent mirror layer primarily reflects ambient light from the front of the vehicle, making the rearview mirror appear as a clear, traditional mirror, fulfilling basic rearview functions. When the controller drives the display screen to show virtual button icons in a specific area, the light emitted by the icons can penetrate the semi-transparent mirror layer and the front rearview mirror, making them clearly visible to the driver. This not only saves space and simplifies the structure but also fundamentally ensures that the indicator icons only briefly appear when triggered, maintaining a pure mirror view under normal conditions. This provides accurate and intuitive button guidance while completely avoiding any constant encroachment or interference of screen content on the rear view, optimizing both the visual experience and driving safety.

[0018] In some embodiments of this application, the backlight module includes: Backlighting is located inside the keycaps of the physical buttons; A driving circuit, electrically connected to the backlight and the controller, is used to receive the backlight driving signal to drive the backlight to light up.

[0019] In this technical solution, the backlight module integrates the backlight into the keycaps of the physical buttons. A dedicated drive circuit receives backlight drive signals from the controller and drives the backlight, enabling direct, localized illumination of designated buttons. This ensures that the illuminated backlight can most intuitively and effectively illuminate the markings or outlines of the target buttons, providing clear visual guidance to users in dark environments. The backlight module is controlled by a front-mounted ambient brightness judgment and hand proximity sensing logic. This hand-controlled hardware response mechanism eliminates ineffective button backlighting in bright environments or unwarranted illumination without any intended operation. Therefore, while achieving efficient guidance, it minimizes energy consumption and fundamentally eliminates potential light pollution and interference to the driver's vision, ensuring a safe visual environment in the cockpit.

[0020] In some embodiments of this application, the driving circuit includes: The signal amplification unit has its input terminal electrically connected to the second control output terminal of the controller; A switching unit, the control terminal of which is electrically connected to the output terminal of the signal amplification unit, and the output terminal of the switching unit is electrically connected to the backlight to drive the backlight to be turned on or off.

[0021] In this technical solution, the drive circuit employs a two-stage linkage structure of a signal amplification unit and a switching unit, forming a reliable and efficient electrical drive link. The signal amplification unit receives and amplifies the backlight drive signal, which may have a low level, from the second control output of the controller, improving its driving capability and anti-interference ability, and ensuring stable transmission of control commands. The amplified signal then controls the switching unit to turn on or off, thereby directly and quickly turning on or off the power supply circuit of the backlight. On the one hand, this ensures that the controller can reliably drive the relatively high-power backlight load with weak logic signals, achieving effective isolation and safe control of strong and weak currents; on the other hand, through the direct control of the power supply circuit by the switching unit, instantaneous lighting and complete shutdown of the backlight are achieved, avoiding standby power consumption and providing a rapid response.

[0022] In some embodiments of this application, the controller receives the infrared level signal as a high-level signal and outputs the backlight driving signal to the backlight module.

[0023] In this technical solution, the controller only outputs a drive signal to the backlight module when it receives a high-level infrared signal from the infrared sensor, ensuring the accuracy and high reliability of the system response. This mechanism, based on explicit level determination, effectively filters out low-level or fluctuating signals that may be caused by environmental infrared noise or disturbances from small objects, thereby preventing false triggering and ensuring that the backlight indicator only lights up when the user has a clear intention to operate, thus improving the overall stability and anti-interference capability of the system.

[0024] In a second aspect, the present invention provides a streaming media rearview mirror, which includes a button indicator device as described in the first aspect.

[0025] In a third aspect, the present invention provides a vehicle that includes a button indicator device as described in the first aspect.

[0026] As can be seen from the above technical solutions, additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0027] Figure 1 This is a first structural schematic diagram of a button indicator device according to an embodiment of this application; Figure 2 This is a second structural schematic diagram of a button indicator device according to an embodiment of this application; Figure 3 This is a third structural schematic diagram of a button indicator device according to an embodiment of this application; Figure 4 This is a schematic diagram of the instruction flow of a button indicator device according to an embodiment of this application.

[0028] In the above figures: 1. Rearview mirror; 11. Physical buttons; 2. Ambient light sensor; 3. Infrared sensor; 31. Infrared emitter; 32. Infrared receiver; 4. Backlight module; 5. Controller; 6. Display module. Detailed Implementation

[0029] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions 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 one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0030] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments. It should be noted that, against the backdrop of the development of automotive intelligence and electrification, vehicle rearview mirrors are gradually being upgraded from traditional optical reflectors to streaming media rearview mirrors that integrate camera and display functions. These rearview mirrors are typically equipped with physical buttons for adjusting display parameters, switching views, or operating menus.

[0031] To facilitate drivers' identification and operation of these buttons in low-light conditions, there are currently two main approaches.

[0032] One approach is to install backlighting inside the keycaps that is always on or turns off after a delay; another is to continuously display a prompt icon at the corresponding physical button position on the display screen of the streaming rearview mirror.

[0033] In the existing technology, the first method mentioned above, when the ambient light is dim, the constantly lit backlight can easily interfere with the driver's forward vision. If it is set to turn off after a delay, the driver still needs to find the button location in the dark during the next operation, which affects the accuracy and convenience of operation. Although the second method can indicate the button location, the persistent icon will occupy or cover the screen display area, interfering with the integrity of the rear view, which also affects driving safety and user experience.

[0034] Based on this, this application proposes a button indicator device, a streaming rearview mirror, and a vehicle. By setting an ambient brightness sensor, an infrared sensor, a controller, and a backlight module, and configuring the controller to activate the infrared sensor when the ambient brightness is lower than a preset threshold, and then controlling the backlight module to light up when the infrared sensor detects a hand approaching, the device achieves the effect of automatically providing button indication only when there is an intention to operate in a dark environment. This solves the technical problem that the button indication method of the existing streaming rearview mirror cannot effectively provide guidance in a dark environment, and at the same time, it is easy to cause continuous interference to the driver's field of vision or the content displayed on the screen.

[0035] In the following, embodiments of this application will be described in detail with reference to the accompanying drawings.

[0036] As attached Figures 1 to 3 As shown in an illustrative embodiment of the button indicator device, streaming media rearview mirror, and vehicle of this application, the button indicator device includes an ambient light sensor 2, an infrared sensor 3, a backlight module 4, and a controller 5.

[0037] An ambient light sensor 2 is mounted on the housing of the rearview mirror 1, with at least part of its photosensitive part exposed, for detecting and outputting ambient light brightness.

[0038] Preferably, the photosensitive part of the ambient brightness sensor 2 can be set towards the windshield of the vehicle to more accurately detect the ambient lighting conditions in the cockpit, and avoid interference from the screen light of the streaming media rearview mirror 1 or other local light sources in the vehicle, thereby ensuring the accuracy of the ambient brightness determination.

[0039] Furthermore, the ambient light sensor 2, based on the photoelectric effect, converts the ambient light intensity in the cockpit into an electrical signal that can be processed by the controller 5.

[0040] Specifically, the sensor collects ambient light inside the cabin through its photosensitive part, which is at least partially exposed outside the housing of the rearview mirror 1. Its internal photosensitive element, such as a photodiode, then proportionally converts the received light signal into an analog electrical signal, which is processed by a conditioning circuit to ultimately output a standardized voltage or digital signal corresponding to the light intensity, i.e., the ambient light brightness signal.

[0041] The infrared sensor 3 is located in the vicinity of the physical button 11 on the housing of the rearview mirror 1, and is used to detect target objects within the detection range and output infrared level signals.

[0042] The backlight module 4 is located inside the keycap of the physical button 11 of the rearview mirror 1 and is electrically connected to the controller 5.

[0043] The controller 5 is located inside the housing of the rearview mirror 1 and is electrically connected to the ambient light sensor 2, the infrared sensor 3 and the backlight module 4 respectively. Among them, the controller 5 receives the ambient light brightness and outputs an infrared drive signal to the infrared sensor 3; the controller 5 receives the infrared level signal and outputs a backlight drive signal to the backlight module 4.

[0044] In some embodiments, such as Figure 1 As shown, the infrared sensor 3 includes an infrared transmitter 31 and an infrared receiver 32.

[0045] Infrared emitter 31 is used to emit infrared light.

[0046] The infrared receiver 32 and the infrared transmitter 31 are arranged side by side, and the sensing end of the infrared receiver 32 faces the same direction as the transmitting end of the infrared transmitter 31.

[0047] Infrared receiver 32 is used to receive infrared light reflected back by a nearby object and convert the reflected light signal into an infrared level signal for transmission to controller 5.

[0048] Preferably, the infrared emitter 31 is driven by a pulse signal of a specific frequency to emit modulated infrared light. When a hand enters its preset detection range, such as a fan-shaped area 10cm to 20cm in front of the sensor, the emitted modulated infrared light will illuminate the surface of the hand. Due to the roughness and non-mirror properties of the skin of the hand, the infrared light will undergo diffuse reflection, and part of the reflected light will return along an approximate path along the emission direction.

[0049] Furthermore, because the infrared receiver 32 is positioned side-by-side with the transmitter and faces the same direction, it can effectively capture the weak infrared light signal reflected back from the hand, which has the same modulation characteristics. The demodulation circuit integrated inside the infrared receiver 32 identifies the reflected signal of this specific frequency and outputs a stable, high-level infrared signal to the controller 5, thereby reliably completing the detection and reporting of the hand's proximity.

[0050] Furthermore, the optical axes of the infrared emitter 31 and the infrared receiver 32 can be arranged at a slight angle, and their intersection area constitutes the detection range. This structure ensures that the emitted light, after being reflected by the hand, can be captured by the receiver at the optimal angle, thus optimizing the sensitivity and directionality of near-field reflective sensing.

[0051] It should be noted that the infrared sensor 3 can be replaced by a capacitive proximity sensor, an ultrasonic sensor, or a millimeter-wave radar sensor, etc. Regardless of the specific proximity sensor used, its function and connection relationship in this application system are similar to those of the infrared sensor 3. It is located in the vicinity of the physical button 11 and is used to detect the approach of a hand within the detection range and output the corresponding sensing signal to the controller 5.

[0052] In some embodiments, the controller 5 includes a first signal input terminal, a first control output terminal, a second signal input terminal, and a second control output terminal.

[0053] The first signal input terminal is electrically connected to the ambient brightness sensor 2 and is used to receive the ambient brightness signal; The first control output terminal is electrically connected to the infrared sensor 3 and is used to output a high-level or low-level infrared drive signal to the infrared sensor 3. The second signal input terminal is electrically connected to the infrared sensor 3 and is used to receive infrared level signals; The second control output terminal is electrically connected to the backlight module 4 and is used to output the backlight drive signal.

[0054] The following reference Figure 4 The instruction process of the button indicator device will be explained in detail.

[0055] Preferably, the controller 5 continuously or periodically receives ambient light intensity signals from the ambient light sensor 2 via its first signal input terminal. The controller 5 internally stores a preset brightness threshold to determine whether the environment is dark or not. The controller 5 compares the received real-time ambient light intensity signal with this preset brightness threshold.

[0056] It should be noted that in this application, the determination of dark and non-dark environments is based entirely on the objective comparison between the ambient light intensity signal and the preset brightness threshold, rather than a specific time period.

[0057] Dark environments refer to insufficient light scenarios where the ambient light intensity is below a threshold. This is not limited to nighttime in nature, but also includes situations where vehicles enter tunnels, underground parking garages, densely shaded roads, or encounter severe weather such as heavy rain or dense fog, causing the external environment to suddenly darken.

[0058] Non-dark environments refer to scenarios where the ambient light intensity reaches or exceeds a preset brightness threshold. This is not limited to daytime in nature, but also includes nighttime, dusk or dawn when urban roads are well lit, as well as situations where artificial light sources such as in-vehicle reading lights are turned on, resulting in sufficient brightness inside the cabin.

[0059] Furthermore, if the comparison result indicates that the current ambient light is lower than a preset brightness threshold, i.e., it is determined to be a dark environment, then the controller 5 outputs a valid infrared drive signal to the infrared sensor 3 through its first control output terminal, for example, switching to a high-level signal. The infrared drive signal serves as an enable or power supply control signal, activating the infrared sensor 3 to enter the working state.

[0060] Furthermore, the activated infrared sensor 3 begins to operate. The infrared emitter 31 emits modulated infrared light. If no object, such as a hand, enters the preset detection range, the infrared receiver 32 does not receive sufficient effective reflected signals, and the infrared level signal output to the second signal input terminal of the controller 5 remains in an invalid state, i.e., a low-level signal. Once a hand enters the detection range, the reflected modulated infrared light is captured by the infrared receiver 32, processed by the internal demodulation and comparison circuit, and an effective infrared level signal, i.e., a high-level signal, is generated and transmitted to the controller 5.

[0061] Furthermore, upon receiving a valid infrared level signal (i.e., a high-level signal) through its second signal input terminal, the controller 5 determines that the hand has approached the operating area. Subsequently, the controller 5 outputs a backlight drive signal to the backlight module 4 through its second control output terminal. Upon receiving the backlight drive signal, the backlight module 4 activates the backlight inside the keycap of the physical button 11, clearly illuminating the button and providing the driver with intuitive visual guidance.

[0062] Furthermore, when the hand leaves the detection range, the infrared receiver 32 no longer receives sufficient reflected signals, and its output infrared level signal returns to an invalid state, i.e., drops to a low level. Upon detecting this change, the controller 5 stops outputting the backlight drive signal, and the backlight is turned off. Simultaneously, the controller 5 continuously monitors the ambient brightness. If the environment becomes brighter, and the ambient brightness is higher than or equal to a preset brightness threshold, the controller 5 switches the infrared drive signal to a low-level signal to shut down the infrared sensor 3, and the system enters a low-power standby state, waiting for the next dark environment trigger.

[0063] In some embodiments, the button control device further includes a display module 6.

[0064] The display module 6 is located in the display area of ​​the rearview mirror 1 and is electrically connected to the controller 5; the controller 5 receives infrared level signals and outputs display drive signals to the display module 6.

[0065] Preferably, when the controller 5 determines that an instruction needs to be provided based on both ambient brightness and the proximity of the hand, it will output a display drive signal to the display module 6 to control it to display a virtual button icon in the display area corresponding to the position of the physical button 11.

[0066] When the hand is removed, or the ambient light increases, or the indication conditions are no longer met, the controller 5 controls the display module 6 to stop displaying the icon, and the corresponding area of ​​the screen returns to a mirror state or is used to display other content, such as the rear view. The display module 6 enables the button indication to be dynamically and non-intrusively integrated into the main display interface of the streaming media rearview mirror 1, providing clear and timely visual guidance without sacrificing the effective display area of ​​the screen and the rear view.

[0067] In some embodiments, the display module 6 includes a display screen and a semi-transparent, semi-reflective mirror layer.

[0068] The display screen is located inside the housing of the rearview mirror 1, behind the mirror surface of the rearview mirror 1, and is electrically connected to the controller 5; a semi-transparent and semi-reflective mirror layer is disposed between the display screen and the mirror surface of the rearview mirror 1.

[0069] Preferably, when the display screen is not illuminated, the semi-transparent and semi-reflective mirror layer has a sufficiently high reflectivity to visible light, allowing the user to observe a clear image of the rearview mirror 1. When the display screen illuminates to show virtual button icons, the icon light can penetrate the semi-transparent and semi-reflective mirror layer and the mirror surface of the rearview mirror 1 in front with sufficient intensity, thus being clearly identified by the user.

[0070] Furthermore, the controller 5 can be configured to dynamically adjust the display brightness or contrast of the virtual button icon based on the ambient light brightness detected by the ambient light sensor 2, so as to ensure good visibility under any ambient light conditions.

[0071] In some embodiments, the backlight module 4 includes a backlight lamp and a driving circuit.

[0072] The backlight is located inside the keycap of physical key 11.

[0073] Preferably, the backlight can be a light-emitting diode with a small package size, which can be embedded behind a specific light guide structure or character cutout area inside the keycap of the physical key 11, so that when lit, the light can shine out evenly and concentratedly from the function mark or outline of the key, achieving precise local lighting.

[0074] The driving circuit is electrically connected to the backlight and the controller 5, and is used to receive the backlight driving signal to drive the backlight to light up.

[0075] In some embodiments, the driving circuit includes a signal amplification unit and a switching unit.

[0076] The signal amplification unit has its input terminal electrically connected to the second control output terminal of the controller 5; The control terminal of the switching unit is electrically connected to the output terminal of the signal amplification unit, and the output terminal of the switching unit is electrically connected to the backlight to drive the backlight to turn on or off.

[0077] Preferably, the signal amplification unit includes a voltage comparator composed of operational amplifiers or a transistor amplifier circuit. Its function is to amplify and shape the backlight drive signal from the second control output terminal of the controller 5, which may have weak current drive capability, and convert it into a drive signal with sufficient current output capability to reliably control the subsequent switching unit.

[0078] Preferably, the control terminal of the switching unit is connected to the second control output terminal of the controller 5, and its output circuit is connected in series in the power supply path of the backlight.

[0079] When the backlight drive signal output by controller 5 is valid (i.e., high level), the switch unit is turned on, thereby providing working current to the backlight and making it light up; when the backlight drive signal is invalid (i.e., low level), the switch control unit is turned off, the backlight current loop is cut off, and it is then turned off.

[0080] Furthermore, the switching unit can be selected from any one of a MOSFET, a bipolar transistor, or a relay.

[0081] Furthermore, the backlight drive signal output by controller 5 can be a PWM (Pulse Width Modulation) signal. By adjusting the duty cycle of the PWM signal, controller 5 can steplessly or in stages adjust the brightness of the backlight, thereby achieving intelligent adjustment of the backlight brightness to adapt to the ambient brightness or user preferences. This provides clear indication while further reducing power consumption and optimizing visual comfort.

[0082] In a second aspect, the present invention provides a streaming media rearview mirror, including a button indicator device as described in the first aspect.

[0083] In a third aspect, the present invention provides a vehicle including a button indicator device as described in the first aspect.

[0084] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A button indicator device, applied to a vehicle rearview mirror, characterized in that, include: An ambient light sensor is installed on the housing of the rearview mirror, with at least part of its photosensitive part exposed, for detecting and outputting ambient light brightness; An infrared sensor is located near the physical buttons on the rearview mirror housing and is used to detect target objects within the detection range and output infrared level signals. The backlight module is located inside the keycap of the physical button on the rearview mirror and is electrically connected to the controller. The controller is housed within the rearview mirror housing and is electrically connected to the ambient light sensor, the infrared sensor, and the backlight module, respectively. in, The controller receives the ambient light intensity and outputs an infrared drive signal to the infrared sensor; and The controller receives the infrared level signal and outputs a backlight driving signal to the backlight module.

2. The button indicator device according to claim 1, characterized in that, The infrared sensor includes: Infrared emitter, used to emit infrared light; An infrared receiver is arranged side by side with the infrared transmitter, and the sensing end of the infrared receiver faces the same direction as the emitting end of the infrared transmitter. The infrared receiver is used to receive infrared light reflected back by a nearby object and convert the reflected light signal into an infrared level signal, which is then transmitted to the controller.

3. The button indicator device according to claim 1, characterized in that, The controller includes: The first signal input terminal is electrically connected to the ambient brightness sensor and is used to receive the ambient brightness signal; The first control output terminal is electrically connected to the infrared sensor and is used to output a high-level or low-level infrared drive signal to the infrared sensor. The second signal input terminal is electrically connected to the infrared sensor and is used to receive the infrared level signal; The second control output terminal is electrically connected to the backlight module and is used to output a backlight driving signal.

4. The button indicator device according to claim 1, characterized in that, Also includes: The display module is located in the display area of ​​the rearview mirror and is electrically connected to the controller; The controller receives the infrared level signal and outputs a display drive signal to the display module.

5. The button indicator device according to claim 4, characterized in that, The display module includes: The display screen is located inside the rearview mirror housing, behind the rearview mirror surface, and is electrically connected to the controller. A semi-transparent, semi-reflective mirror layer is disposed between the display screen and the rearview mirror.

6. The button indicator device according to claim 1, characterized in that, The backlight module includes: Backlighting is located inside the keycaps of the physical buttons; A driving circuit, electrically connected to the backlight and the controller, is used to receive the backlight driving signal to drive the backlight to light up.

7. The button indicator device according to claim 6, characterized in that, The driving circuit includes: The signal amplification unit has its input terminal electrically connected to the second control output terminal of the controller; A switching unit, the control terminal of which is electrically connected to the output terminal of the signal amplification unit, and the output terminal of the switching unit is electrically connected to the backlight to drive the backlight to be turned on or off.

8. The button indicator device according to claim 1, characterized in that, The controller receives the infrared level signal as a high-level signal and outputs the backlight driving signal to the backlight module.

9. A streaming media rearview mirror, characterized in that, It includes the key indicator device as described in any one of claims 1 to 8.

10. A vehicle, characterized in that, It includes the key indicator device as described in any one of claims 1 to 8.

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