Vehicle-mounted front windshield dimming window glass system

Abstract

The invention provides a vehicle-mounted front windshield dimming window glass system capable of realizing light transmittance adjustment through a voice command, which comprises front windshield dimming glass, a sandwich structure formed by compounding glass, a glue film and a dimming film, a dimming area and a non-dimming area, the dimming area is divided into a fixed dimming area and a gradually-changed dimming area from top to bottom, and the light transmittance of the front windshield dimming glass is adjusted through a voice command. The bright-state light transmittance of the dimming area is greater than or equal to 70%; the sound control module is integrated in a vehicle-mounted control system and comprises an MEMS microphone array, a noise reduction algorithm chip and a controller; wherein the sound control module receives data transmitted by the MEMS microphone, inputs an electric signal to the front windshield dimming glass according to a preset program, and adjusts the light transmittance of the front windshield dimming glass. According to the scheme, safe interaction in a driving scene can be realized, and driving danger caused by too strong / too dark light or frequent switching of the light transmittance of the front windshield dimming glass is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of intelligent automobile glass, and in particular relates to a vehicle-mounted front windshield dimming window glass system. Background Art

[0002] With the development of intelligent vehicles, automatic adjustment technology for vehicle front windshield dimming windows has become a research hotspot. Existing technologies generally use dynamic dimming solutions based on ambient light sensing. These solutions use multi-directional light intensity sensors, cameras, and other devices placed on the vehicle to collect real-time ambient brightness data. Machine learning algorithms are then used to predict lighting trends, which in turn drives the dimming device to adjust the glass's light transmittance.

[0003] However, this technical approach presents a trade-off between system complexity and reliability. Scenarios with sudden changes in ambient light intensity (such as entering or exiting tunnels or driving between buildings) require a dimming system with millisecond-level response capabilities. However, interference factors such as light propagation direction and reflections from obstructions can easily lead to misjudgments from a single sensor. To improve accuracy, existing solutions are forced to employ a redundant multi-sensor layout (e.g., three sets of photosensors on the roof, rearview mirror, and instrument panel) and a Kalman filter algorithm for data fusion. This results in high hardware costs, and algorithm iterations rely on continuous training with road test data, resulting in high maintenance costs. Furthermore, the algorithm also needs to consider driver habits and detect whether the driver is wearing sunglasses, making it particularly complex. Furthermore, there is an imbalance between intelligent dynamic response and user experience: when a vehicle continuously passes through areas of alternating light and dark (such as boulevards or under bridges), the system forces high-frequency light transmittance adjustments to achieve real-time performance. This causes the transmittance fluctuations of the dimming window glass to exceed the human eye's adaptation threshold (research has shown that light levels exceeding 0.3 cd / m²·s can easily cause dizziness). However, if a delayed response strategy is adopted, for example, the dimming window glass will maintain a high light transmittance for several seconds after the vehicle exits the tunnel, and the driver will have to withstand instantaneous strong light stimulation, which poses a safety hazard. Similar safety hazards also exist when the headlights of oncoming vehicles are shining at night.

[0004] The passive dimming methods mentioned above only consider the external environment, known as silicon-based artificial intelligence (AI), without considering the feelings and needs of the human subject. People have different visual comfort zones, and active dimming that can meet the comfort needs of different people in different environments can be called biological intelligence (BI), which is the purpose of this invention.

[0005] The present invention provides a vehicle-mounted front windshield system that adjusts light transmittance through voice commands, abandons the fully automatic intelligent light signal system, establishes a driver and passenger behavior feedback mechanism, ensures that the driver's correct instructions are executed when necessary, and reduces the interference caused by frequent changes in light. In addition, rapidly changing environments, such as entering and exiting tunnels, require the driver to control the steering wheel with both hands, without the need for extra hands to adjust buttons and other mechanical operations. The present invention uses voice-controlled dimming to enable instant communication without occupying both hands, and adjusts different light transmittances at any time through the voice control system to meet the driver and passenger's requirements for different comfort in changing environments. Summary of the Invention

[0006] The inventors have proposed a vehicle-mounted front windshield system that adjusts light transmittance in real time through voice commands. The system integrates acoustic wave sensing, signal processing, and dimming glass composite technologies to achieve safe interaction in driving scenarios and avoid driving hazards caused by excessive light / darkness or frequent switching of light transmittance.

[0007] A first aspect of the present invention provides a vehicle-mounted front windshield dimming window glass system, comprising:

[0008] The front windshield dimming glass has a sandwich structure composed of glass, film, and dimming film. It has a dimming area and a non-dimming area. The dimming area is divided into a fixed dimming area and a gradual dimming area from top to bottom, and the transmittance of the dimming area in the bright state is ≥70%;

[0009] The voice control module is integrated into the vehicle control system and includes a MEMS microphone array, a noise reduction algorithm chip, and a controller;

[0010] Among them, the voice control module receives data transmitted by the MEMS microphone, and inputs electrical signals to the front windshield dimming glass according to the preset program to adjust the transmittance of the front windshield dimming glass.

[0011] Furthermore, the voice control module is connected to the vehicle central control system via the CAN bus, supporting dynamic light transmission pattern matching and multi-user voiceprint recognition.

[0012] Furthermore, the vehicle-mounted front windshield dimming window glass system also includes a manual control module.

[0013] Furthermore, the light transmittance in the dimming zone in the bright state ranges from 70% to 85%.

[0014] Furthermore, the dark state transmittance value of the dimming zone ranges from 5% to 45%.

[0015] Furthermore, the dimming zone is located at a transverse sunshade portion of the upper portion of the front windshield dimming glass, and the height of the fixed dimming zone is greater than the height of the gradual dimming zone.

[0016] Furthermore, the width of the fixed dimming area is greater than the width of the gradual dimming area.

[0017] Furthermore, the height of the dimming zone is higher than the driver's eye level.

[0018] Furthermore, the bright-state transmittance of the fixed dimming area is smaller than the bright-state transmittance of the gradient dimming area.

[0019] Furthermore, the dark state transmittance of the fixed dimming area is smaller than the dark state transmittance of the gradual dimming area.

[0020] Furthermore, the front windshield dimming glass includes a first transparent glass, a second transparent glass, and a dimming film arranged between the first transparent glass and the second transparent glass; a first interlayer is arranged between the first transparent glass and the dimming film, and a second interlayer is arranged between the second transparent glass and the dimming film.

[0021] Furthermore, the dimming film includes a first transparent substrate, a first transparent conductive layer, a dimming active layer, a second transparent conductive layer, and a second transparent substrate stacked in sequence; the dimming active layer is selected from at least one of a suspended particle dimming active layer, an electrovariable dimming active layer, and a polymer dispersed liquid crystal dimming active layer.

[0022] In the present invention, there is no special restriction on the types of the first transparent glass and the second transparent glass. They can be transparent glass used in conventional dimming glass assemblies well known to those skilled in the art. They can be ordinary glass such as inorganic glass and organic glass, or functional glass such as UV blocking glass, IR blocking glass, Low-E glass, tempered glass or antibacterial glass.

[0023] Furthermore, the first transparent glass and the second transparent glass are selected from white glass.

[0024] Furthermore, the first interlayer and the second interlayer are selected from at least one of PVB, EVA and TPU.

[0025] In the present invention, the first interlayer and the second interlayer can be EVA film, TPU film, PVB film, or functional film, such as UV-blocking EVA film, UV-blocking TPU film, UV-blocking PVB film, etc., or can be films with a certain color, such as gray EVA film, gray TPU film, gray PVB film, etc.

[0026] Furthermore, the first transparent substrate and the second transparent substrate are each independently selected from at least one of a transparent glass plate and a transparent plastic sheet.

[0027] Furthermore, the concentration of the light-controlling active component in the light-controlling active layer is distributed in a fixed area and a gradual area along the surface of the light-controlling film, and the concentration of the light-controlling active component is higher near the top of the vehicle.

[0028] Furthermore, the concentration of the light-controlling active component in the gradient zone varies gradually along the surface of the dimming film, and the concentration of the light-controlling active component increases as it approaches the top of the vehicle.

[0029] Furthermore, the first transparent conductive layer and the second transparent conductive layer are silver nanowire / conductive graphene composite electrodes.

[0030] The present application also provides a vehicle comprising the above-mentioned vehicle-mounted front windshield dimming window glass system.

[0031] The vehicle-mounted front windshield dimming window glass system of the present invention includes a composite sandwich structure and a voice control module, is connected to the vehicle-mounted central control system via a CAN bus, supports dynamic light transmission mode matching and multi-user voiceprint recognition, ensures the driver's control, sets fixed dimming zones to avoid glare hazards for drivers and passengers, and introduces gradual dimming zones to provide drivers and passengers with an appropriate visual adaptation process, ensuring driving without occupying both hands. The system has low cost and can better ensure driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. The drawings described below are merely embodiments of the present invention. Those skilled in the art can also derive other drawings based on the provided drawings without inventive effort.

[0033] Figure 1 It is a logical schematic diagram of the present invention;

[0034] Figure 2 Schematic diagram of a vehicle-mounted front windshield dimming window glass according to an embodiment of the present invention;

[0035] Among them, 1 is the non-dimming area, 2 is the fixed dimming area, and 3 is the gradual dimming area. DETAILED DESCRIPTION

[0036] the term

[0037] In the present invention, the following terms used have the meanings defined below.

[0038] Transparent conductive film:

[0039] The laminated composition of the transparent substrate and the transparent conductive layer can be a laminated combination of a transparent substrate and a transparent conductive layer, or a laminated combination of a transparent substrate and two transparent conductive layers distributed on both sides thereof.

[0040] Dark state:

[0041] This is the state where the light transmittance of the front windshield dimming window glass is the lowest.

[0042] Bright state:

[0043] This is the state where the light transmittance of the front windshield dimming window glass is the highest.

[0044] CAN bus:

[0045] The CAN (Controller Area Network) bus is a multi-master serial communication protocol that uses differential signals (CAN_H / CAN_L) to transmit data and supports a priority arbitration mechanism.

[0046] MEMS microphones:

[0047] A MEMS (Micro-Electro-Mechanical System) microphone is a miniature sound sensor built using micro-electromechanical system technology. Its core structure consists of a silicon-based diaphragm and a back plate forming a capacitor. Sound wave vibrations cause capacitance changes, which are then converted into electrical signals.

[0048] The present invention provides a vehicle-mounted front windshield dimming window glass system that can control light transmittance at any time through sound, which can effectively ensure the driver's control over light and avoid driving hazards caused by excessive light / darkness or frequent switching of light intensity.

[0049] In order to better illustrate the present invention, the following specific examples are provided.

[0050] Preparation of light-controlling particles:

[0051] To a 250 mL three-necked round-bottom glass flask, 30 g of an isoamyl acetate solution containing 21.2 wt% nitrocellulose (SS1 / 4sec), 6 g I2, 70 g isoamyl acetate, 4 g anhydrous CaI2, and 4 g titanium dioxide (P25) were added and heated to 42°C. After the I2 dissolved, 6 g anhydrous methanol, 0.8 g distilled water, and 4 g 2,5-pyrazinedicarboxylic acid dihydrate were added to the three-necked round-bottom glass flask. The mixture was stirred and heated at 42°C for 4 hours, then cooled naturally. The resulting reaction solution was centrifuged at 1350G for 0.5 h to remove large particles, and the supernatant was centrifuged at 18000G for 5 h. The supernatant was discarded to obtain light-controllable particles.

[0052] Preparation of polymer matrix precursor:

[0053] Dissolve 2.7g of trisilylethyl-POSS in 190mL of heptane to prepare a POSS solution. Add 54g of hydroxy-terminated dimethyldiphenylpolysiloxane and 190mL of the POSS solution to a 500mL three-necked round-bottom glass flask. Connect a water separator to a condenser on one side of the flask, install a mechanical stirrer in the middle, and place a thermometer on the other side. Heat the solution in the flask to reflux for 30 minutes. When a small amount of water appears in the water separator, add a stannous octoate catalyst solution (0.13g of stannous octoate dissolved in 10mL of heptane). Then, add a mixture of 3g of hydrolyzed acryloxypropyltrimethoxysilane and 1.8g of hydrolyzed epoxypropyltrimethoxysilane dropwise over a period of approximately 5 minutes. Allow the condensation reaction to proceed for 5 hours, after which 30mL of trimethylmethoxysilane is immediately added as a terminator. The reaction is terminated for 2 hours, followed by rapid cooling to room temperature. Mix 50 mL of ethanol and the cooled reaction solution in a 1-L beaker. Rinse the reaction flask with 30 mL of heptane and pour it into the beaker. After mixing thoroughly, add 200 mL of methanol and stir for 15 minutes. Pour the resulting mixture into a 1-L separatory funnel and let it stand for several hours until layers form. Remove the lower clear layer and rotary evaporate it at 70°C to obtain the polymer matrix precursor.

[0054] Prepare the light control layer base emulsion:

[0055] 0.1 g of photoinitiator 819, 3.0 g of light-controlling particles, 26.9 g of suspending medium (dioctyl terephthalate) and 70.0 g of polymer matrix precursor were mixed evenly to obtain light-controlling layer matrix emulsion A.

[0056] Prepare the light control layer matrix emulsion diluent:

[0057] 0.1 g of photoinitiator 819 and 70.0 g of polymer matrix precursor were mixed evenly to obtain light control layer matrix emulsion diluent B.

[0058] Preparation of suspended particle dimming film:

[0059] The light-control layer matrix emulsion A is added to tank A, and the light-control layer matrix emulsion diluent B is added to tank B. The materials in tanks A and B are transported to the die head by a gear pump. By setting a distribution system in the die head, the concentration of the light-controlling particles at the die lip outlet is controlled from one side to the other: the width of the fixed light-controlling particle concentration is 5.5 cm, and then the width of the gradual light-controlling particle concentration gradually decreases to zero is 2.5 cm, that is, the total width of the dimming zone is 8.0 cm, and the width of the zero light-controlling particle concentration is 95 cm;

[0060] The above materials A and B were coated on the ITO / PET transparent conductive film using a roll-to-roll automatic coating machine. Then, another layer of ITO / PET transparent conductive film was covered on the wet film of the light control layer matrix emulsion to obtain a wet film containing the light control layer. In a nitrogen atmosphere, the film was cured in a UV curing box for 1 minute with a UV power of 700W / m 2 , that is, a suspended particle dimming film is obtained.

[0061] Cut a dimming film to the size required for the front windshield dimming window glass. Apply conductive silver paste and conductive adhesive to the outer edge of the first transparent conductive layer and the distal edge of the second transparent conductive layer of the dimming film. Attach two conductive copper tapes to the silver paste and conductive adhesive, respectively, and dry them to obtain two conductive leads, which are then connected to an external power supply.

[0062] The first transparent glass, the first interlayer, the suspended particle dimming film, the second interlayer and the second transparent glass are stacked in sequence and placed in an autoclave, and laminated at 110°C and 1.0 MPa to obtain a dimming glass. Figure 2 As shown; wherein, the first transparent glass and the second transparent glass are selected from white glass, with a thickness of 2 mm, and the first interlayer and the second interlayer are selected from 0.76 mm PVB film;

[0063] The above-mentioned dimming glass is used as the front windshield dimming glass of the car;

[0064] Alternatively, the existing car windshield is used as the window glass. A two-component epoxy glue is applied to a 1cm wide area along the inner edge of the window glass using a glue dispenser. PVB film is adhered to the glue. After curing at room temperature, acrylic modified polyurethane glue is applied to the other side of the PVB film using the same glue dispenser. The aforementioned dimming glass that matches the size of the car skylight is then adhered to the acrylic modified polyurethane glue. The glued area is exposed to a UV lamp for curing. The UV light intensity is 2000W / m 2 , curing time 60s;

[0065] The voice control module controls the front windshield dimming window glass system and is connected to the vehicle's central control system via the CAN bus. It includes a MEMS microphone array, a noise reduction algorithm chip and a controller, and supports multi-user voiceprint recognition. The MEMS microphone receives the voices of the driver and passengers and recognizes keywords for five-level dimming, and transmits data to the controller. According to the preset program, the controller inputs an electrical signal to the external power supply of the front windshield dimming glass, adjusts the AC voltage applied to the front windshield dimming glass from 0 to 110V in five levels, and then adjusts the visible light transmittance of the dimming zone of the dimming glass from 5 to 85% in five levels.

[0066] Overall, the voltage regulation circuit combines intelligent control and electronic components, which can comply with the driver's dimming wishes to the greatest extent, freeing both hands to ensure driving, and is more suitable for complex and changeable road conditions, ensuring driving safety.

[0067] The above embodiments are intended only to facilitate understanding of the methods and core concepts of the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein, but is intended to be construed in the widest manner consistent with the principles and novel features disclosed herein.

Claims

1. A vehicle-mounted front windshield dimming window glass system, characterized in that: include: The front windshield dimming glass has a sandwich structure composed of glass, film, and dimming film. It has a dimming area and a non-dimming area. The dimming area is divided into a fixed dimming area and a gradual dimming area from top to bottom, and the transmittance of the dimming area in the bright state is ≥70%; The voice control module is integrated into the vehicle control system and includes a MEMS microphone array, a noise reduction algorithm chip, and a controller; Among them, the voice control module receives data transmitted by the MEMS microphone, and inputs electrical signals to the front windshield dimming glass according to the preset program to adjust the transmittance of the front windshield dimming glass.

2. The vehicle-mounted front windshield dimming window glass system according to claim 1, characterized in that: The voice control module is connected to the vehicle's central control system via the CAN bus and supports dynamic light transmission pattern matching and multi-user voiceprint recognition.

3. The vehicle-mounted front windshield dimming window glass system according to claim 1, characterized in that: The vehicle-mounted front windshield dimming window glass system also includes a manual control module.

4. The vehicle-mounted front windshield dimming window glass system according to claim 1, characterized in that: The light transmittance in the dimming zone is in a range of 70% to 85%.

5. The vehicle-mounted front windshield dimming window glass system according to claim 1, characterized in that: The dark state transmittance value of the dimming zone ranges from 5% to 45%.

6. The vehicle-mounted front windshield dimming window glass system according to claim 1, characterized in that: The dimming zone is located at a transverse sunshade portion of the upper portion of the front windshield dimming glass, and the width of the fixed dimming zone is greater than the width of the gradual dimming zone.

7. The vehicle-mounted front windshield dimming window glass system according to claim 1, characterized in that: The height of the dimming zone is higher than the driver's eye level.

8. The vehicle-mounted front windshield dimming window glass system according to claim 1, characterized in that: The bright-state transmittance of the fixed dimming area is smaller than the bright-state transmittance of the gradual dimming area.

9. The vehicle-mounted front windshield dimming window glass system according to claim 1, characterized in that: The dark state transmittance of the fixed dimming area is smaller than the dark state transmittance of the gradual dimming area.

10. The vehicle-mounted front windshield dimming window glass system according to claim 1, characterized in that: The front windshield dimming glass includes a first transparent glass, a second transparent glass, and a dimming film arranged between the first transparent glass and the second transparent glass; a first interlayer is arranged between the first transparent glass and the dimming film, and a second interlayer is arranged between the second transparent glass and the dimming film.

11. The vehicle-mounted front windshield dimming window glass system according to claim 10, characterized in that: The dimming film includes a first transparent substrate, a first transparent conductive layer, a dimming active layer, a second transparent conductive layer, and a second transparent substrate stacked in sequence; the dimming active layer is selected from at least one of a suspended particle dimming active layer, an electrovariable dimming active layer, and a polymer dispersed liquid crystal dimming active layer.

12. The vehicle-mounted front windshield dimming window glass system according to claim 11, characterized in that: The concentration of the light-controlling active component in the light-controlling active layer is distributed in a fixed area and a gradual change area along the surface of the light-controlling film, and the concentration of the light-controlling active component is higher near the top of the vehicle.

13. A vehicle comprising the vehicle-mounted front windshield dimming window glass system according to claims 1 to 12.

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