Intelligent vehicle-mounted slide system and vehicle

Abstract

The invention provides an intelligent vehicle-mounted slide system and a vehicle, which are used for vehicle body projection of labels, advertisements and license plate numbers and comprise an ambient light intensity sensing module, a dynamic brightness control module and an automatic dormancy module. The dynamic brightness control module adjusts the driving current or duty ratio of the LED in real time by adjusting the driving current and pulse width modulation (PWM) according to the external illumination intensity detected by the ambient light intensity sensing module in real time, so that the visual contrast ratio of the projected image-text label is kept in different environments, and stroboflash is inhibited. The device is small in size, low in power consumption and economical in cost, can be mounted on a rearview mirror or a side skirt of a vehicle, and is suitable for identity identification and advertisement projection of an online hailing vehicle, a bus and a logistics vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle-mounted identification and graphic display technology, and is suitable for visual display of license plate information or graphic information, and in particular relates to an intelligent vehicle-mounted slide system and a vehicle. Background Art

[0002] On the one hand, existing in-vehicle projection devices mostly use digital projectors, which have complex systems and are subject to high prices and operation and maintenance costs. At the same time, digital projectors use relatively fixed brightness projection, or the brightness adjustment range is too narrow, resulting in glare at night and unreadable during the day, and high energy consumption and heat generation.

[0003] On the other hand, existing traditional slide projectors use a light bulb to illuminate a slide, which is then magnified through a lens. This principle is simple and consumes low power. However, existing portable slide projectors (such as those in Japanese patent JP3047152U) only work in dark environments and lack adaptive adjustment capabilities for varying ambient lighting conditions. Furthermore, portable projectors have a relatively constant light output, resulting in excessive darkness during the day and glare at night.

[0004] To address these issues, the present invention proposes an intelligent vehicle-mounted slide projector system based on the principles of a slide projector and an intelligent control system. This system combines ambient illumination sensing with dynamic light intensity control to achieve adaptive brightness adjustment while retaining the low cost and low power consumption advantages of a slide projector. Summary of the Invention

[0005] The present invention provides an intelligent vehicle-mounted slide projector system. While retaining the advantages of the minimalist optical path of a traditional slide projector, it achieves automatic brightness adjustment within the ambient illumination range of 10 lux to 100,000 lux, maintains visual contrast, solves the two major pain points of "invisible during the day and glaring at night", and overcomes the glare problem caused by temporary changes in the ambient light intensity of the scene.

[0006] The intelligent vehicle-mounted slide projector system of the present invention follows the optical path of a slide projector and includes a power module, a light source module, a graphic module, and a lens module. It also includes an intelligent control module, a delayed environmental sensing module, a dynamic brightness control module, and may include an automatic sleep module and a vehicle-mounted housing. Light emitted by the light source module passes through the graphic module, is amplified and focused by the lens module, and then projected onto the exterior surface of the vehicle body. The delayed environmental sensing module detects ambient illumination in real time, and the dynamic brightness control module controls the light source module by adjusting the drive current and / or pulse width modulation based on the illumination signal, achieving adaptive brightness adjustment.

[0007] The specific technical solutions are as follows:

[0008] The intelligent control module contains a Bluetooth electronic switch and a physical manual switch for turning the system on and off; the Bluetooth electronic switch is used to receive brightness gear switching instructions sent by the mobile phone APP; the physical manual switch is used to manually switch the brightness gear and restore the automatic mode.

[0009] The light source module may be one or both of an LED light source and a laser light source, and is used to generate projection light.

[0010] The graphic film module can be a transparent or translucent object, which is arranged on the light-emitting side of the light source module and is used to carry and transmit graphic information; the graphic film module is a transparent glass or plastic sheet that can be replaced manually or automatically, and the graphic information includes license plate numbers or operating prompts.

[0011] The lens module can be a lens or a lens group, which is arranged on the light-emitting side of the image and text module, and is used to amplify and focus the image and text information before transmitting it; the projection area can be the side of the vehicle body or the ground.

[0012] The delayed environment perception module is used to monitor the ambient light intensity and output an illumination signal; after detecting that the ambient illumination change exceeds a preset threshold and continues to meet the delay condition, the delayed environment perception module outputs the ambient illumination signal to the dynamic brightness control module: the delay condition is (a) N consecutive sampling cycles, N is an integer greater than or equal to 2; or (b) the duration reaches or exceeds the preset delay length T seconds, T is an integer less than or equal to 20.

[0013] The dynamic brightness control module receives the illumination signal from the delayed environmental sensing module and instructs the current intensity of the light source module. The dynamic brightness control module includes a dimming mode for adjusting the driving current: the continuous ambient illumination range is divided into N illumination intervals, where 2≤N≤5; each illumination interval corresponds to an independently settable constant current interval [I_min, I_max], where I_min≥0.05·I_rated, I_max≤I_rated, and I_rated is the rated operating current of the light source module; based on the illumination interval in which the current illumination signal is located, the light source module is controlled to output the current within the corresponding constant current interval. The boundary values ​​of the illumination intervals are adjustable within the range of 100lux–15000lux, and the overlap tolerance of the boundaries of adjacent intervals does not exceed ±10%. The boundary values ​​of the constant current interval [I_min, I_max] and the illumination interval are adjustable by the user or manufacturer through firmware, jumpers, or an external resistor network.

[0014] The dynamic brightness control module can also include a pulse width modulation (PWM) dimming mode: for every 1000 lux increase in ambient light intensity, the duty cycle increases by 10%-20%; the maximum duty cycle is limited to 85%. The dynamic brightness control module can also include dual dimming modes: when the target output brightness is less than X% of the rated brightness of the LED light source, the LED drive current is adjusted by adjusting the dimming method; when the target output brightness is ≥ X% of the rated brightness of the LED light source, the pulse width modulation (PWM) dimming method is adjusted; the pulse width modulation (PWM) frequency is ≥ 0.5kHz, and X is a positive number between 20 and 80.

[0015] The automatic sleep module is electrically connected to the delayed environmental sensing module and the power module, and is configured to switch the power module between a low-power mode and a normal operating mode. The automatic sleep module includes: a sleep trigger unit configured to trigger sleep mode when no user operation is detected and no significant change in ambient illumination occurs within a preset time period of M minutes; and a wakeup detection unit configured to detect the pressing of a physical manual switch, the sending of a Bluetooth command, or a change in ambient illumination, and to wake up the power module; where M is an integer less than or equal to 10.

[0016] The vehicle-mounted housing is used to accommodate the above-mentioned modules. The waterproof level can be IP65 and is provided with a mounting structure that can be detachably connected to the vehicle; the mounting structure can be a quick-release buckle or a screw structure provided on the housing.

[0017] The power supply module is used to supply power to the above modules and can use a vehicle-mounted 12V or a built-in battery.

[0018] The present invention also provides a vehicle equipped with an intelligent vehicle-mounted slide projector system for projecting a license plate number or prompt information onto the side of the vehicle body or the ground.

[0019] The beneficial effects of the present invention are that it adopts a slide projector optical path, which is much cheaper than a digital projector optical path; it adopts a dimming method of adjusting the driving current or pulse width modulation (PWM), which has extremely simple hardware; it is suitable for full lighting environments of 10 lux - 100,000 lux; and it realizes intelligent adaptive adjustment of projection brightness. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] One or more embodiments are exemplified by pictures in the corresponding drawings. These exemplified descriptions do not constitute limitations on the embodiments. The modules / elements and steps in the drawings represent various similar modules / elements and steps in the specific implementation process. Unless otherwise stated, the borders of the module block diagrams in the drawings do not constitute limitations on the physical space position and physical space relationship of the specific devices that implement the various functions of this module.

[0021] Figure 1 Schematic diagram of the principle of intelligent car projector;

[0022] Figure 2 Schematic diagram of the integrated installation of the vehicle housing and rearview mirror.

[0023] The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0024] The present invention will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several variations and improvements can be made without departing from the scope of the present invention. These all fall within the scope of protection of the present invention.

[0025] Please refer to Figure 1 Schematic diagram of the principle of the intelligent vehicle slide system.

[0026] As an example, Figure 1 This is a schematic diagram of the principle of the intelligent vehicle slide system, which includes the following modules:

[0027] The intelligent control module 10 includes at least one of a Bluetooth electronic switch 101 and a physical manual switch 102. In some embodiments, Bluetooth communication or vehicle bus communication is used to implement the electronic switch function while giving priority to the manual switch.

[0028] The light source module 20 provides a projection light source, including at least one of an LED light source 201 and a laser light source 202. In some embodiments, the light source includes an LED or a 635nm laser diode, supporting a 10mA-500mA constant current and a 1kHz-20kHz pulse width modulation (PWM) operation.

[0029] The image / text film module 30 is made of a replaceable transparent film (glass / plastic) and is placed at the light output of the light source module 20. In some embodiments, it supports quick replacement of image / text films by rotating a turntable or plugging in and out. Furthermore, in some embodiments, it can accommodate at least three image / text films.

[0030] The lens module 40 , including a fixed-focus or adjustable-focus lens combination, is placed at the light exit of the image module 30 for projecting onto the vehicle door or the ground. In some embodiments, the projection angle ranges from 30° to 40°.

[0031] The ambient light intensity sensing module 50 includes a light sensor for measuring the ambient light intensity and sending the information to the dynamic brightness control module 60. In some embodiments, the light sensor has a measurement range of 0-100,000 lux and a field of view of ≥120°;

[0032] Dynamic brightness control module 60 is used to control the intensity of the projected light from light source module 20. In some embodiments, it includes a microcontroller and a constant current driver chip. Furthermore, in some embodiments, it includes built-in pulse width modulation (PWM), gamma compensation, hysteresis threshold adjustment, and overcurrent protection.

[0033] The power module 70 includes at least one of a battery and a vehicle power source. In some embodiments, it includes a rechargeable lithium battery of 2000 mAh or more, and can also be plugged into a vehicle power source.

[0034] The automatic sleep module 80 is electrically connected to the delayed environmental sensing module 50 and the power module 70 and is configured to switch the power module 70 between a low-power mode and a normal operating mode. In some embodiments, the sleep mode is triggered when no user operation is detected within a preset time of 5 minutes and no significant change in ambient illumination occurs. The power module 70 is awakened when a physical manual switch is pressed, a Bluetooth command is sent, or a change in ambient illumination is detected.

[0035] The vehicle-mounted housing 90 can be injection-molded, with a protection grade of IP65 and built-in heat dissipation fins; it can be integrated and installed on the rearview mirror or the side skirt of the vehicle body, effectively utilizing the original vehicle exterior space.

[0036] The projection surface 100 can be a car door 1001 or the ground 1002 .

[0037] As an example, a two-speed constant current drive intelligent in-vehicle slideshow system can be provided. The system follows a classic optical path: a 3W white LED emits a beam, which passes through a laser-engraved glass image, is magnified by a single convex lens, and then projected onto the vehicle door surface. The system utilizes a 3.7V, 2000mAh rechargeable lithium battery and has a built-in charge management chip, microcontroller, and Bluetooth communication circuitry. The intelligent control module internally sets a threshold of 1000 lux: when ambient brightness falls below 1000 lux, the microcontroller directly drives the constant current chip to output 50mA; above 1000 lux, the output switches to 700mA. Users can send a "low brightness" or "high brightness" command via a mobile app, and the microcontroller immediately overrides the automatic logic and maintains the specified setting until another command is received. The automatic sleep module automatically enters low-power mode if there is no operation for 5 minutes and the ambient illumination is stable. Simultaneously, it waits for a physical manual switch press, a Bluetooth command, or a change in ambient illumination to wake it up. A physical manual switch is also located on the side of the housing: a short press cycles through dim, high, and off; a three-second press restores automatic mode. The dividing line and current levels can be fine-tuned within the 800–1200 lux and 40–60mA / 650–750mA ranges via a smartphone app or a small potentiometer on the side of the housing.

[0038] As an embodiment, the intelligent vehicle-mounted slide projector system can also adopt dual-mode dimming technology: when the target output brightness is <50% of the rated brightness of the light source, the dimming method of adjusting the driving current is adopted, and the γ≈0.6 compensation curve is used; when the target output brightness is ≥50% of the rated brightness of the light source, a high-frequency pulse width modulation (PWM) dimming method is adopted, and the pulse width modulation (PWM) frequency is ≥1kHz; the hysteresis threshold is set to 30lux, the sampling period is 100ms, and the brightness response time is ≤120ms.

[0039] Please refer to Figure 2 Schematic diagram of the installation of the snap-on smart car slide projector.

[0040] As an example, a smart car projector 2021 is secured above a rearview mirror 2023 via a clip 2022. Smart car projector 2021 utilizes a high-brightness LED light source, and the image is laser-engraved on a glass sheet. A portion of the license plate number 2024 is pre-engraved on the glass sheet via a laser. This allows the light to pass through the glass sheet through a light path and then, under the focus of a lens, project onto the front door 2025, thereby displaying the projected portion of the license plate number 2024, such as the last two digits "28." The position of the clip 2022 can be fine-tuned to ensure that the projected light is angled 30 degrees downward toward the front door 2025.

[0041] Please continue to refer to the attached Figure 1 .

[0042] The modules and their functional units may or may not be physically separated, that is, they may be located in one place, or they may be reintegrated and distributed to multiple physical units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present invention.

[0043] As an embodiment, a vehicle is provided, comprising the vehicle-mounted slideshow system device and the method of executing the device proposed in any of the above embodiments.

[0044] It should be noted that the embodiments described above, including implementation methods, structural diagrams, schematic diagrams, etc., are merely illustrative. The present invention is not limited to the specific implementation methods described above. Those skilled in the art may make variations or modifications, which do not affect the essence of the present invention and should be considered as the scope of protection of the present invention.

Claims

1. An intelligent vehicle-mounted slideshow system, characterized in that: include: An intelligent control module, including one or both of a Bluetooth electronic switch and a physical manual switch, for switching the system on and off; A light source module, including one or both of an LED light source and a laser light source, for generating projection light; The image and text module includes a transparent or translucent object, which is arranged on the light-emitting side of the light source module and is used to carry and transmit labels or image and text information; A lens module, comprising a lens or a lens group, is provided on the light-emitting side of the image and text module, and is used to amplify and focus the label or image and text information for projection; A time-delayed environment perception module, including a light sensor, is used to monitor the ambient light intensity and output an illumination signal; A dynamic light intensity control module is used to receive the illumination signal of the delayed environment perception module and drive the light source module to output a preset target output brightness according to the corresponding relationship between the preset target output brightness and the illumination signal; The method of driving the light source module by the dynamic light intensity control module includes adjusting one or both of the driving current and pulse width modulation.

2. The intelligent vehicle-mounted slideshow system according to claim 1, characterized in that: The Bluetooth electronic switch is used to receive brightness level switching instructions sent by the mobile phone APP; the physical manual switch is used to manually switch the brightness level and restore the automatic mode.

3. The intelligent vehicle-mounted slideshow system according to claim 1, characterized in that: After detecting that the change in ambient illumination exceeds a preset threshold and continues to meet a delay condition, the delayed environment perception module outputs an ambient illumination signal to the dynamic brightness control module; the delay condition is (a) N consecutive sampling cycles, where N is an integer greater than or equal to 2; or (b) the duration reaches or exceeds a preset delay length of T seconds, where T is an integer less than or equal to 20.

4. The intelligent vehicle-mounted slideshow system according to claim 1, characterized in that: The dimming mode for adjusting the driving current is configured as follows: dividing the continuous ambient illumination range into N illumination intervals, where 2≤N≤5; each illumination interval corresponds to an independently settable constant current interval [I_min, I_max], where I_min≥0.05·I_rated, I_max≤I_rated, and I_rated is the rated operating current of the light source module; according to the illumination interval in which the current illumination signal is located, controlling the driving current of the light source module to correspond to the constant current interval.

5. The intelligent vehicle-mounted slide projector system according to claim 1, characterized in that: The PWM dimming mode is configured as follows: for every 1000 lux increase in ambient light intensity, the duty cycle increases by 10%-20%; the maximum duty cycle is limited to 85%.

6. The intelligent vehicle-mounted slideshow system according to claim 1, characterized in that: The light source module adopts an LED light source, and the dynamic light intensity control module adopts a dual-mode dimming mode to drive the LED light source. The dual-mode dimming mode means that when the target output brightness is less than X% of the rated brightness of the LED light source, a dimming method of adjusting the driving current is adopted to adjust the driving current of the LED; when the target output brightness is greater than or equal to X% of the rated brightness of the LED light source, a pulse width modulation dimming method is adopted; the frequency of the pulse width modulation is greater than or equal to 0.5kHz; and X is a positive number between 20 and 80.

7. The intelligent vehicle-mounted slide projector system according to claim 1, characterized in that: It also includes an automatic sleep module, which is electrically connected to the delayed environment perception module and the power supply module, and is used to control the power supply module to switch between a low power consumption mode and a normal working mode.

8. The intelligent vehicle-mounted slide projector system according to claim 6, characterized in that: The automatic sleep module includes: a sleep trigger unit, which is used to trigger the sleep mode when no user operation is detected within a preset time of M minutes and the ambient illumination has not changed significantly; a wake-up detection unit, which is used to detect the pressing of a physical manual switch, the sending of a Bluetooth command, or a change in ambient illumination, and wake up the power module; M is an integer less than or equal to 10.

9. A vehicle, characterized in that: The intelligent vehicle-mounted slide projector system according to any one of claims 1 to 7 is installed to project the license plate number or graphic information onto the side of the vehicle body or the ground.

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