Automobile b-pillar back light and control method thereof

Abstract

This invention relates to the field of automotive backlighting and control technology, providing an automotive B-pillar backlight and its control method. The automotive B-pillar backlight includes a backlight source and a B-pillar cover plate. The method involves real-time detection of the ambient light intensity inside the vehicle; comparison of the ambient light intensity with a set light intensity threshold; and issuing a backlight activation signal when the ambient light intensity is lower than the set light intensity threshold. Upon receiving the backlight activation signal, the method calculates the difference between the light intensity threshold and the ambient light intensity, and calculates the required current of the backlight source by combining the backlight source's conversion efficiency and power supply voltage. Based on the required current of the backlight source, a control strategy is obtained, and the current of the backlight source is controlled accordingly. If the B-pillar cover plate uses a liquid crystal display panel, the method also controls the transmission of graphics and / or text for display. This invention can create a decorative lighting effect on the automotive B-pillar, improving the interior lighting effect and enhancing the overall aesthetics of the interior lighting.

Description

Technical Field

[0001] This invention relates to the field of automotive backlighting and control technology, and in particular to an automotive B-pillar backlight and its control method. Background Technology

[0002] The B-pillar of a car is a structural support component located between the front and rear doors. Its main function is to support the roof structure of the vehicle and it can also withstand a certain amount of side impact force to ensure the safety of the driver and passengers. It is an essential structural support component of the car body.

[0003] Currently, automotive interior lighting is mainly located on the roof and near the instrument panel at the front of the vehicle. Although interior space is limited, seat placement and other factors create shadows and poor lighting in the lower rear sections, making it difficult to find items. The need for side windows for natural light further complicates finding suitable lighting locations in the lower rear areas. To address this, patent document CN 217575015U provides a vertical lighting fixture and a vehicle incorporating it. The fixture includes a lighting body mounted on the rear side of the upper B-pillar interior panel. The lighting body is electrically connected to the main front lighting switch, the front lighting door control switch, and the marker light switch. The lighting body includes a mounting base, a light guide plate, a switch, a lampshade, and a panel. The mounting base is mounted on the rear side of the upper B-pillar interior panel, the panel is mounted on the mounting base, the light guide plate is installed between the panel and the mounting base, and the switch and lampshade are mounted on the panel. However, this patent uses a standard lighting fixture, which can only change color at most and cannot display graphics and / or text or other advanced information.

[0004] Existing car B-pillars lack any function to display graphics and / or text. Even with lighting installed, they remain monotonous and dull, making it difficult to achieve more flexible lighting adjustments. They also cannot create a cohesive effect with the interior lighting, failing to display graphics and / or text and thus failing to balance lighting and aesthetics. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides an automotive B-pillar backlight, including a backlight source and a B-pillar cover plate;

[0006] The backlight is located on the inside of the B-pillar cover, and is bonded to the B-pillar cover around its perimeter. The backlight includes LED lights, a light guide plate, and a light enhancement film, with the LED lights located on the side of the light guide plate.

[0007] B-pillar cover plates are used to display graphics and / or text;

[0008] The B-pillar cover is made of PC or glass and pre-printed with graphics and / or text using a printing process.

[0009] or,

[0010] The B-pillar cover uses a liquid crystal display panel that includes a lower polarizer, a TFT-LCD panel, a flexible printed circuit board (FPC), and an upper polarizer. The TFT-LCD panel is electrically connected to the flexible printed circuit board.

[0011] Optionally, the backlight has one or more light-emitting areas including LEDs, a light guide plate, and a light enhancement film;

[0012] The B-pillar cover is used to display graphics and / or text, with the position corresponding to the illuminated area.

[0013] Optionally, a light intensity detection sensor and controller may also be included;

[0014] A light intensity sensor is used to detect ambient light intensity in real time and transmit the data to the controller;

[0015] The controller is connected to both the light intensity detection sensor and the backlight; when the ambient light intensity is lower than the set light intensity threshold, the controller controls the backlight to emit light.

[0016] If the B-pillar cover uses an LCD panel, the B-pillar cover is also connected to the controller, and the controller transmits graphics and / or text to the LCD panel for display.

[0017] Optionally, the B-pillar cover includes a cover body and a back panel, the cover body being used to display graphics and / or text;

[0018] The cover plate body has an arc shape in the middle of its cross-section. A first groove is provided on the inner side of the arc on both sides of the cross-section. A second groove is provided on both sides of the cross-section of the back plate to fit and interlock with the first groove. A waterproof sealing strip is provided at the interlocking joint of the first groove and the second groove. The cover plate body and the back plate form a cavity after being interlocked.

[0019] The backlight is located inside the cavity of the B-pillar cover, and the backlight is bonded to the back panel of the B-pillar cover with double-sided adhesive.

[0020] Optionally, the controller includes:

[0021] The judgment module is used to compare the ambient light intensity with the set light intensity threshold. When the ambient light intensity is lower than the set light intensity threshold, a signal to start the backlight is issued.

[0022] The calculation module is used to calculate the difference between the light intensity threshold and the ambient light intensity after receiving the backlight activation signal, and calculate the required current of the backlight by combining the backlight conversion efficiency and power supply voltage.

[0023] The execution module is used to obtain the control strategy based on the required current of the backlight, and to control the current of the backlight accordingly based on the control strategy.

[0024] Optionally, when an LCD display panel is used in the B-pillar cover, the controller includes:

[0025] The communication module is used to interact with the vehicle's in-vehicle communication unit (VCU) to obtain real-time panoramic images of the surrounding area captured by an external panoramic camera connected to the in-vehicle communication unit.

[0026] The coordinate positioning module is used to establish the vehicle's positioning coordinate system, determine the coordinates of the B-pillar backlight, determine the eye coordinates of the passenger based on the facial image, and determine the corresponding position coordinates of the surrounding panoramic image.

[0027] The perspective simulation analysis module is used to perform perspective simulation analysis of passengers based on the coordinates of the corresponding positions of the car B-pillar backlight, the passenger's eyes, and the surrounding panoramic image in the positioning coordinate system. It determines the range of the image that is obscured by the car B-pillar from the passenger's perspective in the surrounding panoramic image and extracts image slices of the range of the image that is obscured by the car B-pillar from the surrounding panoramic image.

[0028] The scene re-display module is used to obtain the correspondence between each corresponding point of the image slice in the perspective simulation analysis and each point on the B-pillar of the car from the passenger's perspective. Based on the correspondence, the image slice is positioned on the B-pillar cover, and the image slice is transmitted to the B-pillar cover for presentation based on the display positioning.

[0029] The present invention also provides a method for controlling a car B-pillar backlight, using the aforementioned car B-pillar backlight, comprising the following steps:

[0030] S100: Real-time detection of ambient light intensity inside the car;

[0031] S200: Compares the ambient light intensity with the set light intensity threshold. When the ambient light intensity is lower than the set light intensity threshold, it sends a signal to start the backlight.

[0032] S300: After receiving the backlight activation signal, calculate the difference between the light intensity threshold and the ambient light intensity, and calculate the required current of the backlight by combining the backlight conversion efficiency and power supply voltage.

[0033] S400: Based on the required current of the backlight, obtain the control strategy and control the current of the backlight accordingly; if the B-pillar cover uses an LCD panel, it also controls the transmission to provide graphics and / or text for display.

[0034] Optionally, it also includes acquiring facial images of rear-seat passengers; performing eye response recognition through image processing; inputting the image into a pre-trained human eye visual feedback model to obtain passenger feedback information on lighting; and fine-tuning the light intensity based on the feedback information until the feedback information obtained from the passenger's eye response is deemed comfortable.

[0035] Optionally, obtain eye response data of sample users to different light intensities, and use probability distribution statistical techniques to obtain the light intensity value of the sample users with the most comfortable eye response data, which is used as the default reference value for light intensity control; if the default reference value is inconsistent with the light intensity threshold, the default reference value is used to replace the light intensity threshold for the initial luminous intensity control of the backlight.

[0036] Each time, the image features of the passenger's face in the back seat are extracted first and compared with the image features of previously saved face images. The passenger is then classified, recorded and saved according to the passenger identification. The previous light intensity fine-tuning information of the passenger is obtained for adjusting the backlight intensity. Then, the light intensity is fine-tuned again according to the passenger's eye reaction recognition and the human eye visual feedback model is used to obtain feedback information until the feedback information obtained from the passenger's eye reaction is comfortable. The light intensity fine-tuning information of the passenger's current ride is saved.

[0037] If the number of recorded rides and light intensity fine-tuning information for the same passenger reaches a set value, then the passenger's visual adaptive light intensity is obtained by analyzing the passenger's previous light intensity fine-tuning information using a set averaging algorithm. This, combined with the face average, is used as the passenger's light intensity preference value. This preference value is then used as the light intensity fine-tuning information for adjusting the backlight's luminous intensity in subsequent rides.

[0038] Optionally, for automotive B-pillar backlights using LCD panels on B-pillar covers, the following are also included:

[0039] By interacting with the vehicle's in-vehicle communication device, the system obtains real-time panoramic images of the surrounding area captured by an external panoramic camera connected to the in-vehicle communication device.

[0040] Establish the vehicle's positioning coordinate system, determine the coordinates of the B-pillar backlight, determine the passenger's eye coordinates based on the facial image, and determine the corresponding position coordinates of the surrounding panoramic image.

[0041] Based on the coordinates of the corresponding positions of the car B-pillar backlight, the passenger's eyes, and the surrounding panoramic image in the positioning coordinate system, the passenger's perspective is simulated and analyzed to determine the range of the image obscured by the car B-pillar in the passenger's perspective in the surrounding panoramic image, and then an image slice of the range of the image obscured by the car B-pillar is extracted from the surrounding panoramic image.

[0042] The system obtains the correspondence between each corresponding point of the image slice in the perspective simulation analysis and each point on the B-pillar of the car from the passenger's perspective. Based on the correspondence, the system positions the image slice on the B-pillar cover and then transmits the image slice to the B-pillar cover for display.

[0043] The present invention relates to a car B-pillar backlight and its control method, which uses a backlight source to provide illumination. The backlight source uses LEDs, which are light-emitting diodes, semiconductor devices that can directly convert electrical energy into light energy. The core semiconductor chip is mounted on a support, with one end as the negative electrode and the other end connected to the positive electrode of the power supply. The entire chip is encapsulated in epoxy resin. The semiconductor chip consists of three parts: a P-type semiconductor, a quantum well, and an N-type semiconductor. The quantum well is located between the P-type and N-type semiconductors. Within the quantum well, electrons and holes recombine to emit energy in the form of photons. The light guide plate uses a high-transmittance material as a substrate, with regular dots printed on the back, which can convert point or line light sources into surface light sources. In this solution, the light guide plate converts the light emitted by the side-emitting LEDs into surface light sources. The brightness enhancement film, also called a prism film, has a surface microstructure designed through reasonable optical simulation. Like a total internal reflection prism, it can concentrate light from a larger propagation direction into a smaller angle on the front, thereby improving the brightness of the front. B-pillar covers are used to display graphics and / or text. If made of PC or glass, logos, graphics, or welcome messages can be pre-printed on them. If an LCD panel is used, it has a display function, capable of receiving and displaying graphics and / or text transmitted from the control system. They can also create lighting decorations on the B-pillar, improving interior lighting by using backlighting and avoiding large shadows in the lower and middle sections of the car when only top lighting is used. Furthermore, displaying graphics and / or text on the B-pillar allows it to be integrated into the overall interior lighting design, enhancing the overall effect. This flexibility allows for customization to meet the individual needs of different users.

[0044] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in this application.

[0045] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0046] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0047] Figure 1This is a schematic cross-sectional view of a car B-pillar backlight in an embodiment of the present invention;

[0048] Figure 2 This is a front view of the backlight emitting area used in an embodiment of the automotive B-pillar backlight of the present invention.

[0049] Figure 3 This is a schematic cross-sectional view of the backlight structure used in an embodiment of the automotive B-pillar backlight of the present invention.

[0050] Figure 4 This is a control principle diagram used in an embodiment of the automotive B-pillar backlight of the present invention;

[0051] Figure 5 This is a schematic diagram of the controller used in an embodiment of the automotive B-pillar backlight of the present invention;

[0052] Figure 6 This is a schematic diagram of controller two used in an embodiment of the automotive B-pillar backlight of the present invention;

[0053] Figure 7 This is a schematic diagram of the controller used in an embodiment of the automotive B-pillar backlight of the present invention.

[0054] Figure 8 This is a flowchart illustrating a method for controlling the backlight of a car's B-pillar in an embodiment of the present invention. Detailed Implementation

[0055] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0056] like Figure 1-3 As shown, this embodiment of the invention provides a car B-pillar backlight. Figure 1 This is a cross-sectional view, including the backlight 1 and the B-pillar cover plate 2;

[0057] The backlight 1 is located on the inner side of the B-pillar cover plate 2, and the backlight 1 is bonded to the B-pillar cover plate 2 around its perimeter. The backlight 1 includes an LED lamp 11, a light guide plate 12, and a brightness enhancement film 13. The LED lamp is located on the side of the light guide plate, which can be single-sided or multi-sided, for example, on opposite sides. The display light-emitting area of ​​the backlight can be one light-emitting area, two light-emitting areas, or even more. Each light-emitting area includes an LED lamp 11, a light guide plate 12, and a brightness enhancement film 13. The LED lamp 11, the light guide plate 12, and the brightness enhancement film 13 are all mounted on a frame 14, which is a hollow frame for bonding.

[0058] The cover plate body 21 is used to display graphics and / or text; the position of the cover plate body 21 used to display graphics and / or text is set to correspond to the light-emitting area;

[0059] The cover plate body 21 is made of PC or glass and pre-printed with graphics and / or text using a printing process;

[0060] or,

[0061] The cover plate body 21 is a liquid crystal display panel that includes a lower polarizer, a TFT-LCD panel, a flexible circuit board (FPC) and an upper polarizer. The TFT-LCD panel is electrically connected to the flexible circuit board.

[0062] The working principle of the above technical solution is as follows: The backlight in this solution is used to provide illumination. The LED used in the backlight is a light-emitting diode, which is a semiconductor device that can directly convert electrical energy into light energy. The core semiconductor chip can be set on a support, with one end as the negative electrode and the other end connected to the positive electrode of the power supply. The entire chip is encapsulated with epoxy resin. The semiconductor chip consists of three parts: a P-type semiconductor, a quantum well, and an N-type semiconductor. The quantum well is located between the P-type and N-type semiconductors. In the quantum well, electrons and holes recombine to emit energy in the form of photons. The light guide plate uses a high-transmittance material as a substrate, with regular dots printed on the back. It can convert point light sources or line light sources into surface light sources. In this solution, the light guide plate converts the light emitted by the side-emitting LED into a surface light source. The brightness enhancement film, also called a prism film, has a microstructure on its surface designed through reasonable optical simulation. Like a total internal reflection prism, it can concentrate light from a larger propagation direction into a smaller angle on the front, thereby improving the brightness of the front. B-pillar cover plates are used to display graphics and / or text. If made of PC or glass, logos, graphics, or welcome messages can be pre-printed on them. If made of LCD panels, they have display functions and can receive and display graphics and / or text transmitted from the control system.

[0063] The beneficial effects of the above technical solution are as follows: The B-pillar backlight provided by this solution can form a light decoration on the B-pillar of the car. On the one hand, by setting a backlight, the interior lighting effect is improved, avoiding the large area of ​​insufficient light shadow in the middle and lower parts of the car when only the top lighting is used; on the other hand, by presenting graphics and / or text on the B-pillar cover, the B-pillar position can be incorporated into the overall interior lighting design, enhancing the overall effect of the interior lighting; it is flexible and versatile, and can adapt to the personalized requirements of different individuals.

[0064] In one embodiment, such as Figure 4 As shown, it also includes a light intensity detection sensor 5 and a controller 6;

[0065] The light intensity sensor 5 is used to detect the ambient light intensity inside the car in real time and transmit it to the controller;

[0066] The controller 6 is connected to the light intensity detection sensor 5 and the backlight 1 respectively; when the ambient light intensity is lower than the set light intensity threshold, the controller 6 controls the backlight to emit light.

[0067] If the B-pillar cover 2 uses an LCD display panel, the B-pillar cover panel is also connected to the controller 6, and the controller 6 transmits graphics and / or text to the LCD display panel for display.

[0068] The working principle and beneficial effects of the above technical solution are as follows: This solution uses a light intensity detection sensor to detect the ambient light intensity inside the car in real time. The controller compares the ambient light intensity with the set light intensity threshold to determine whether the car's B-pillar backlight is needed for illumination, thus avoiding wasting energy during daylight hours when there is sufficient light. When using an LCD display panel, the necessary graphics and / or text are transmitted to the LCD display panel for display as needed, enhancing the user experience.

[0069] In one embodiment, such as Figure 1 As shown, the B-pillar cover 2 includes a cover body 21 and a back panel 22. The cover body 21 is used to display graphics and / or text.

[0070] The cover plate body 21 has an arc-shaped cross-section in the middle. A first groove 23 is provided on the inner side of the arc on both sides of the cross-section. A second groove 24 is provided on both sides of the cross-section of the back plate 22 to engage with the first groove 23. A waterproof sealing strip 3 is provided at the engagement of the first groove 23 and the second groove 24. After the cover plate body 21 and the back plate 22 are engaged, they form a relatively closed cavity.

[0071] The backlight 1 is installed inside the cavity of the B-pillar cover plate 2, and the backlight 1 is bonded to the back plate 22 of the B-pillar cover plate 2 with double-sided adhesive 4.

[0072] The working principle and beneficial effects of the above technical solution are as follows: This solution mainly adopts an arc-shaped cover plate body and a back plate, which together form a B-pillar cover plate, forming a relatively closed cavity inside. The backlight is placed in the cavity, which can effectively protect the backlight and improve its service life. The cover plate body and the back plate are connected by a groove and a waterproof sealing strip is provided to prevent rainwater from seeping into the cavity and endangering the backlight. After installation, the outer side of the arc-shaped cover plate body is the exposed display part. The arc shape can avoid sharp injuries and increase aesthetics. If the arc-shaped cover plate body is a liquid crystal display panel, it can be an arc formed by splicing multiple strip liquid crystal display panels, or a shaped curved liquid crystal display panel can be used.

[0073] In one embodiment, such as Figure 5 As shown, controller 6 includes:

[0074] The judgment module 61 is used to compare the ambient light intensity with the set light intensity threshold. When the ambient light intensity is lower than the set light intensity threshold, a backlight start signal is issued.

[0075] The calculation module 62 is used to calculate the difference between the light intensity threshold and the ambient light intensity after receiving the backlight start signal, and calculate the required current of the backlight by combining the backlight conversion efficiency and power supply voltage.

[0076] The execution module 63 is used to obtain the control strategy based on the required current of the backlight, and to control the current of the backlight accordingly based on the control strategy.

[0077] The working principle and beneficial effects of the above technical solution are as follows: This solution controls the B-pillar backlight of a car by controlling the backlight current based on the detected ambient light intensity and the backlight conversion efficiency, thus achieving precise backlight intensity control and improving the stability of the interior lighting. Additionally, a machine vision module can be installed to capture facial images of rear-seat passengers. Through image processing, eye response recognition is performed, and the image is input into a trained human visual feedback model to obtain feedback information. Based on this feedback, the light intensity is fine-tuned, thereby improving the matching of light intensity with different passenger preferences and enhancing the user experience.

[0078] In one embodiment, such as Figure 6 and 7 As shown, when the B-pillar cover 2 uses a liquid crystal display panel, the controller 6 includes:

[0079] The communication module 64 is used to interact with the vehicle's in-vehicle communication unit (VCU) to obtain real-time panoramic images of the surrounding area captured by the external panoramic camera connected to the in-vehicle communication unit.

[0080] The coordinate positioning module 65 is used to establish the vehicle's positioning coordinate system, determine the coordinates of the vehicle's B-pillar backlight, determine the passenger's eye coordinates based on the facial image, and determine the corresponding position coordinates of the surrounding panoramic image.

[0081] The perspective simulation analysis module 66 is used to perform perspective simulation analysis of the passenger based on the coordinates of the corresponding positions of the car B-pillar backlight, the passenger's eyes and the surrounding panoramic image in the positioning coordinate system, determine the image range of the surrounding panoramic image that is blocked by the car B-pillar from the passenger's perspective, and extract image slices of the image range blocked by the car B-pillar from the surrounding panoramic image.

[0082] The scene re-display module 67 is used to obtain the correspondence between each corresponding point of the image slice in the perspective simulation analysis and each point on the B-pillar of the car from the passenger's perspective. Based on the correspondence, the image slice is positioned on the B-pillar cover, and the image slice is transmitted to the B-pillar cover for presentation based on the display positioning.

[0083] The working principle and beneficial effects of the above technical solution are as follows: This solution connects to the vehicle communication device through a communication module to acquire real-time panoramic images of the surrounding area captured by an external panoramic camera. Positioning is performed according to a pre-established coordinate system, and combined with passenger perspective simulation analysis, the range of images obscured by the B-pillar when observing the exterior of the car from the passenger's position is determined. Corresponding image slices are then extracted from the surrounding panoramic images for display on the B-pillar cover. This solution ensures that passengers in the rear seats adjacent to the B-pillar will not have their views obscured by the B-pillar, creating a B-pillar stealth effect for them. A voice interaction module can also be included to receive passenger voice commands, allowing for switching between image slices and other selected graphics and / or text. Furthermore, to prevent deviations when displaying image slices, passenger voice adjustment commands can be received to fine-tune the image slice's position vertically or horizontally, recording the adjustment value. This value is then used for position compensation in subsequent image slice displays, further enhancing the B-pillar stealth effect.

[0084] like Figure 8 As shown, this embodiment of the invention provides a control method for a car B-pillar backlight, using the aforementioned car B-pillar backlight, including the following steps:

[0085] S100: Real-time detection of ambient light intensity inside the car;

[0086] S200: Compares the ambient light intensity with the set light intensity threshold. When the ambient light intensity is lower than the set light intensity threshold, it sends a signal to start the backlight.

[0087] S300: After receiving the backlight activation signal, calculate the difference between the light intensity threshold and the ambient light intensity, and calculate the required current of the backlight by combining the backlight conversion efficiency and power supply voltage.

[0088] S400: Based on the required current of the backlight, obtain the control strategy and control the current of the backlight accordingly; if the B-pillar cover uses an LCD panel, it also controls the transmission to provide graphics and / or text for display.

[0089] The working principle and beneficial effects of the above technical solution are as follows: The automotive B-pillar backlight provided by this solution can form a decorative light on the B-pillar of the car. On the one hand, by setting a backlight source, it improves the interior lighting effect and avoids large areas of insufficient light and shadow in the lower part of the car when only top lighting is used. On the other hand, by displaying graphics and / or text on the B-pillar through the B-pillar cover, the B-pillar position can be integrated into the overall interior lighting design, enhancing the overall effect of the interior lighting. It is flexible and can adapt to the personalized requirements of different individuals. Furthermore, by detecting the ambient light intensity inside the car in real time and comparing the ambient light intensity with the set light intensity threshold, it determines whether the automotive B-pillar backlight is needed, avoiding wasting energy during daylight hours when there is sufficient light. When using an LCD display panel, the necessary graphics and / or text are transmitted to the LCD display panel for display as needed, enhancing the user experience.

[0090] In one embodiment, the method further includes acquiring facial images of rear-seat passengers; performing eye response recognition through image processing; inputting the image into a pre-trained human eye visual feedback model to obtain passenger feedback information on lighting; and fine-tuning the light intensity based on the feedback information until the feedback information obtained from the passenger's eye response indicates a comfortable experience.

[0091] The working principle and beneficial effects of the above technical solution are as follows: This solution collects facial images of passengers in the rear seats, performs eye response recognition, and uses a human eye visual feedback model to conduct adaptive feedback analysis on the lighting intensity of passengers, obtaining feedback information. If the passenger squints or makes an uncomfortable facial expression, the feedback information is that the light intensity is too high, so the backlight intensity is slightly reduced; if the passenger widens their eyes, the feedback information is that the light intensity is too low, so the backlight intensity is slightly increased; until the passenger's eye expression is natural, indicating that the current light intensity matches the passenger's feeling, the backlight intensity is controlled to maintain the current light intensity, thereby enhancing the user experience.

[0092] In one embodiment, eye response data of sample users to different light intensities is obtained. Using probability distribution statistical techniques, the light intensity value with the highest eye response data of the sample users who are comfortable is obtained and used as the default reference value for light intensity control. If the default reference value is inconsistent with the light intensity threshold, the default reference value is used to replace the light intensity threshold for the initial luminous intensity control of the backlight.

[0093] Each time, the image features of the passenger's face in the back seat are extracted first and compared with the image features of previously saved face images. The passenger is then classified, recorded and saved according to the passenger identification. The previous light intensity fine-tuning information of the passenger is obtained for adjusting the backlight intensity. Then, the light intensity is fine-tuned again according to the passenger's eye reaction recognition and the human eye visual feedback model is used to obtain feedback information until the feedback information obtained from the passenger's eye reaction is comfortable. The light intensity fine-tuning information of the passenger's current ride is saved.

[0094] If the number of recorded rides and light intensity fine-tuning information for the same passenger reaches a set value, the passenger's visual adaptive light intensity is analyzed using a set averaging algorithm based on past light intensity fine-tuning information. This, combined with the average facial value, is used as the passenger's light intensity preference value. When the passenger rides again, this light intensity preference value is used as the light intensity fine-tuning information to adjust the backlight intensity, thus achieving personalized lighting control for different passengers.

[0095] The working principle and beneficial effects of the above technical solution are as follows: This solution uses probability distribution statistical technology to analyze the eye response data of numerous sample users to different light intensities, and obtains the light intensity value with the highest probability (the most sample users with comfortable eye response data) as the default reference value for light intensity control; for first-time passengers, the default reference value is used instead of the light intensity threshold for the initial light intensity control of the backlight, which can reduce the probability of needing to adjust the light intensity and reduce the energy consumption of control; in addition, it can be combined with facial recognition to determine whether the passenger is a new passenger or a passenger who has ridden before; for each passenger who has ridden before, light intensity preference analysis is performed, and personalized lighting control is realized for different passengers based on the analysis results, further reducing the probability of needing to adjust the light intensity.

[0096] In one embodiment, for a B-pillar backlight of a car using a liquid crystal display panel, the method further includes:

[0097] By interacting with the vehicle's in-vehicle communication unit (VCU), it obtains real-time panoramic images of the surrounding area captured by an external panoramic camera connected to the in-vehicle communication unit.

[0098] Establish the vehicle's positioning coordinate system, determine the coordinates of the B-pillar backlight, determine the passenger's eye coordinates based on the facial image, and determine the corresponding position coordinates of the surrounding panoramic image.

[0099] Based on the coordinates of the corresponding positions of the car B-pillar backlight, the passenger's eyes, and the surrounding panoramic image in the positioning coordinate system, the passenger's perspective is simulated and analyzed to determine the range of the image obscured by the car B-pillar in the passenger's perspective in the surrounding panoramic image, and then an image slice of the range of the image obscured by the car B-pillar is extracted from the surrounding panoramic image.

[0100] The system obtains the correspondence between each corresponding point of the image slice in the perspective simulation analysis and each point on the B-pillar of the car from the passenger's perspective. Based on the correspondence, the system positions the image slice on the B-pillar cover and then transmits the image slice to the B-pillar cover for display.

[0101] The working principle and beneficial effects of the above technical solution are as follows: This solution connects to the vehicle communication device through a communication module to acquire real-time panoramic images of the surrounding area captured by an external panoramic camera. Positioning is performed based on a pre-established coordinate system, and combined with passenger perspective simulation analysis, the range of images obscured by the car's B-pillar when observing the exterior from the passenger's position is determined. Corresponding image slices are then extracted from the surrounding panoramic images for display on the B-pillar cover. This solution allows passengers in the rear seats adjacent to the B-pillar to observe the outside without being unable to see certain areas due to the B-pillar obstruction. For these passengers, this solution creates a B-pillar stealth effect.

[0102] In one embodiment, the method further includes:

[0103] The system acquires external images through the side windows of the car using an in-vehicle camera, uses a comparison module to determine the corresponding areas of the surrounding panoramic image and the external image, compares and analyzes the image parameters of the corresponding areas of the external image and the surrounding panoramic image, and obtains the image parameter conversion rate of converting the corresponding areas of the surrounding panoramic image into the external image.

[0104] A side window detection module is used to obtain the glass lifting information of the two side windows on both sides of the car's B-pillar. An image processing module is used to determine the height boundary line corresponding to the image slice based on the current height of the glass in the glass lifting information. An image parameter conversion rate is used to perform image parameter conversion processing on the area below the height boundary line in the image slice to obtain the converted image slice. The converted image slice is then transmitted to the B-pillar cover for display.

[0105] The working principle and beneficial effects of the above technical solution are as follows: This solution acquires an external image taken through the side window of the car, compares and analyzes the corresponding area of ​​the surrounding panoramic image, and obtains the image parameter conversion rate that transforms the corresponding area of ​​the surrounding panoramic image into the external image. The image parameter conversion rate includes at least the RGB parameter value conversion rate and the image brightness value conversion rate. By acquiring the glass lifting information of the two side windows on both sides of the car's B-pillar, the current height of the glass is obtained and used to determine the height boundary line corresponding to the image slice. For the lower area of ​​the image slice that is equal to the current height of the glass, the image parameter conversion rate is used to perform image parameter conversion processing. The B-pillar cover displays the converted image slice, which can form the effect of observing the outside through the glass at the same height as the glass on the image slice, so that the B-pillar and the front and rear glass form an integrated observation picture, thereby further enhancing the B-pillar's stealth effect and enhancing the user experience. If the lifting height of the front and rear glass of the B-pillar is inconsistent, the height of the lower glass can be used to determine the height boundary line of the image slice.

[0106] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. An automotive B-pillar back light characterized by, Including the backlight and B-pillar cover; The backlight is located on the inside of the B-pillar cover, and is bonded to the B-pillar cover around its perimeter. The backlight includes LED lights, a light guide plate, and a light enhancement film, with the LED lights located on the side of the light guide plate. B-pillar cover plates are used to display graphics and / or text; The B-pillar cover is made of PC or glass and pre-printed with graphics and / or text using a printing process. It also includes a light intensity detection sensor and a controller; A light intensity sensor is used to detect ambient light intensity in real time and transmit the data to the controller; The controller is connected to both the light intensity detection sensor and the backlight; when the ambient light intensity is lower than the set light intensity threshold, the controller controls the backlight to emit light. Collect facial images of passengers in the rear seats; perform eye response recognition through image processing, input the image into a pre-trained human eye visual feedback model, obtain the passengers' feedback information on lighting, and fine-tune the light intensity based on the feedback information until the feedback information obtained from the passengers' eye responses is considered comfortable. We obtained eye response data of sample users to different light intensities. Using probability distribution statistical techniques, we obtained the light intensity value of the sample users with the most comfortable eye response data, which was used as the default reference value for light intensity control. If the default reference value is inconsistent with the light intensity threshold, the default reference value will be used instead of the light intensity threshold for the initial luminous intensity control of the backlight. Each time, the image features of the passenger's face in the back seat are extracted first and compared with the image features of previously saved face images. The passenger is then classified, recorded and saved according to the passenger identification. The previous light intensity fine-tuning information of the passenger is obtained for adjusting the backlight intensity. Then, the light intensity is fine-tuned again according to the passenger's eye reaction recognition and the human eye visual feedback model is used to obtain feedback information until the feedback information obtained from the passenger's eye reaction is comfortable. The light intensity fine-tuning information of the passenger's current ride is saved. If the number of records of the same passenger's ride count and light intensity fine-tuning information reaches the set value, then the passenger's visual adaptive light intensity is obtained by analyzing the passenger's previous light intensity fine-tuning information using the set mean algorithm, and combined with the face mean, is used as the passenger's light intensity preference value. The passenger's light intensity preference value will be used as light intensity fine-tuning information for adjusting the backlight intensity when the passenger rides in the future.

2. The automotive B-pillar back light according to claim 1, characterized in that, The backlight has one or more light-emitting areas including LED lights, light guide plates and light enhancement films; The B-pillar cover is used to display graphics and / or text, with the position corresponding to the illuminated area.

3. The automotive B-pillar back light according to claim 1, characterized in that, The B-pillar cover plate includes a cover plate body and a back panel. The cover plate body is used to display graphics and / or text. The cover plate body has an arc shape in the middle of its cross-section. A first groove is provided on the inner side of the arc on both sides of the cross-section. A second groove is provided on both sides of the cross-section of the back plate to fit and interlock with the first groove. A waterproof sealing strip is provided at the interlocking joint of the first groove and the second groove. The cover plate body and the back plate form a cavity after being interlocked. The backlight is located inside the cavity of the B-pillar cover, and the backlight is bonded to the back panel of the B-pillar cover with double-sided adhesive.

4. The automotive B-pillar back light of claim 1, wherein, The controller includes: The judgment module is used to compare the ambient light intensity with the set light intensity threshold. When the ambient light intensity is lower than the set light intensity threshold, a signal to start the backlight is issued. The calculation module is used to calculate the difference between the light intensity threshold and the ambient light intensity after receiving the backlight activation signal, and calculate the required current of the backlight by combining the backlight conversion efficiency and power supply voltage. The execution module is used to obtain the control strategy based on the required current of the backlight, and to control the current of the backlight accordingly based on the control strategy.

5. A control method of an automobile B-pillar back light, characterized by, The automotive B-pillar backlight according to claim 1 includes the following steps: S100: Real-time detection of ambient light intensity inside the car; S200: Compares the ambient light intensity with the set light intensity threshold. When the ambient light intensity is lower than the set light intensity threshold, it sends a signal to start the backlight. S300: After receiving the backlight activation signal, calculate the difference between the light intensity threshold and the ambient light intensity, and calculate the required current of the backlight by combining the backlight conversion efficiency and power supply voltage. S400: Based on the required current of the backlight, obtain the control strategy and control the current of the backlight accordingly; if the B-pillar cover uses an LCD panel, it also controls the transmission to provide graphics and / or text for display.

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