Automobile front windshield color changing device and method based on electrochromism

Abstract

The invention discloses an electrochromism-based automobile front windshield discoloring device, which comprises an electrochromism module, a photoelectric sensor and a control unit, the electrochromism module comprises a plurality of electrochromism interlayers, the electrochromism interlayers are uniformly distributed in a plurality of subareas of a front windshield, the photoelectric sensor and the control unit are arranged in an automobile compartment, and the photoelectric sensor and the control unit are electrically connected with the electrochromism module. The electrochromic interlayer and the photoelectric sensor are respectively connected with the control unit; the photoelectric sensor is used for sensing external irradiation light, forming an optical signal and sending the optical signal to the control unit, and the control unit is used for analyzing the light intensity and the irradiation angle according to the optical signal sent by the photoelectric sensor and controlling the circuit on-off and the voltage of each electrochromic interlayer, so that the electrochromic interlayer in the strong light area of the front windshield changes color; and the influence of incident or reflected strong light is weakened and eliminated. The electrochromism module is arranged, the electrochromism interlayers are evenly distributed in the multiple subareas of the front windshield, and the subareas can change color to weaken or eliminate incident or reflected strong light after being powered on.

Description

Technical Field

[0001] The present invention relates to the field of optoelectronic technology, and in particular to a device and method for changing the color of a front windshield of an automobile for reducing or eliminating incident or emitted strong light. Background Art

[0002] The strong light from the car's front windshield is one of the sources of danger during driving. The strong light may come from various light sources such as sunlight, street lights, traffic lights, etc., or from reflections on the windshield of oncoming vehicles, causing glare to the human eye and even making the driver lose the ability to judge the road conditions.

[0003] At present, the shading solution for the front windshield of most mass-produced vehicles is a sun visor. When glaring sunlight enters the car through the front windshield and affects the driver's driving, the sun visor needs to be opened manually to block the strong light. When the sun visor is opened, the driver's field of vision will also be affected to a certain extent.

[0004] Therefore, there is an urgent need for a car windshield color changing device and method that can effectively reduce strong light when strong light occurs and does not affect the driving field of vision. Summary of the invention

[0005] The purpose of the present invention is to overcome the problem of glare to the driver caused by strong light incident on or reflected from the car windshield in the prior art, and to provide a car windshield color changing device and method based on electrochromism, which can reduce the risk of strong light from the outside entering the driver's eyes, and can reduce the reflection caused by the windshield, and prevent the reflection from entering oncoming vehicles and causing driving risks.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A car front windshield color changing device based on electrochromism, comprising an electrochromic module, a photoelectric sensor and a control unit, wherein the electrochromic module comprises a plurality of electrochromic interlayers, the electrochromic interlayers are evenly arranged in a plurality of partitions of the front windshield, the photoelectric sensor and the control unit are arranged in the car compartment, and the electrochromic interlayers and the photoelectric sensor are respectively connected to the control unit;

[0008] The photoelectric sensor is used to sense external light and form a light signal to send to the control unit. The control unit is used to analyze the light intensity and illumination angle according to the light signal sent by the photoelectric sensor, and control the circuit on-off and voltage of each electrochromic interlayer, so that the electrochromic interlayer in the strong light area of ​​the front windshield changes color, reducing and eliminating the impact of incident or reflected strong light.

[0009] Furthermore, the electrochromic interlayer is a conductive interlayer filled with a color-changing liquid or a conductive interlayer embedded with an electrochromic film.

[0010] Furthermore, the electrochromic interlayer has a three-layer structure of a top layer, a middle layer and a bottom layer. The top layer and the bottom layer are transparent conductive glass or transparent conductive flexible film, and the middle layer is a gel-state electrochromic layer. The middle layer changes color under the action of voltage.

[0011] Furthermore, the number of the photoelectric sensors is greater than five, and the installation locations of the photoelectric sensors include the vehicle roof ceiling, the top of the vehicle seat, the rear compartment, the rear window, and the rear seat backrest.

[0012] Furthermore, the control unit controls the power-on state and input voltage of the electrochromic interlayer through a series-parallel circuit.

[0013] A method for changing the color of a car windshield based on electrochromism, applied to any of the above-mentioned devices for changing the color of a car windshield based on electrochromism, comprises the following steps:

[0014] The photoelectric sensor senses the irradiated light and forms a light signal to be sent to the control unit;

[0015] The control unit analyzes the light intensity and irradiation angle according to the light signal sent by the photoelectric sensor;

[0016] The control unit controls the on / off circuit and voltage of each electrochromic interlayer according to the light intensity and irradiation angle;

[0017] The electrochromic interlayer in the strong light area of ​​the front windshield changes color to reduce and eliminate the impact of incident or reflected strong light.

[0018] Furthermore, the control unit determines the strong light position of the windshield through the difference in light signal strength of different photoelectric sensors, controls the color change of the electrochromic interlayer in the strong light area of ​​the windshield, and changes the color change depth according to the strength of the strong light.

[0019] Furthermore, the control unit determines that the intensity of the optical signal is 10 or more levels, within 2 levels is a normal signal, and greater than 2 levels is an abnormal signal. The signal level is obtained by subtracting the weakest light intensity value from the strongest light intensity value and then performing lg10.

[0020] Furthermore, the control unit controls the voltage of the electrochromic interlayer to 0.7V, 0.8V, 0.9V, 1V 1.1V, 1.2V, 1.3V, and 1.4V according to the intensity of the light signal sent by the photoelectric sensor, which correspond to 3, 4, 5, 6, 7, 8, 9, and 10 level signals respectively.

[0021] Further, according to the light signal sent by the photoelectric sensor, the control unit controls the voltage input to the designated partition of the front windshield, and the voltage magnitude is determined according to the light intensity of the light signal;

[0022] The electrochromic interlayer in the bright light area of ​​the windshield begins to change color quickly after voltage is input. The stronger the voltage, the darker the color, while the windshield always remains transparent.

[0023] Compared with the prior art, the electrochromic interlayer of the present invention is evenly arranged in multiple partitions of the front windshield. The photoelectric sensor senses the external irradiation light and forms an optical signal to send to the control unit. The control unit analyzes the light intensity and irradiation angle according to the optical signal, and controls the circuit on-off and voltage of each electrochromic interlayer according to the light intensity and irradiation angle, so that the electrochromic interlayer in the strong light area of ​​the front windshield changes color, reducing and eliminating the impact of incident or reflected strong light. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the color-changing device for the front windshield of an automobile based on electrochromism.

[0025] Figure 2 The figure is a schematic diagram of the process of the method for changing the color of the automobile windshield based on electrochromism. DETAILED DESCRIPTION

[0026] The electrochromic automobile windshield color changing device and method of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] See also Figure 1 The present invention discloses a car front windshield color changing device based on electrochromism, including an electrochromic module, a photoelectric sensor and a control unit. The electrochromic module includes multiple electrochromic interlayers, which are evenly arranged on multiple partitions of the front windshield. The photoelectric sensor and the control unit are arranged in the car compartment, and the electrochromic interlayer and the photoelectric sensor are respectively connected to the control unit.

[0028] The photoelectric sensor is used to sense external light and form a light signal to send to the control unit. The control unit is used to analyze the light intensity and illumination angle according to the light signal sent by the photoelectric sensor, and control the circuit on-off and voltage of each electrochromic interlayer, so that the electrochromic interlayer in the strong light area of ​​the front windshield changes color, reducing and eliminating the impact of incident or reflected strong light.

[0029] Specifically, the electrochromic interlayer is a conductive interlayer filled with a color-changing liquid or a conductive interlayer embedded with an electrochromic film, which can achieve rapid color change and fading and reduce strong light. In this embodiment, the electrochromic interlayer structure is a simple sandwich structure. The electrochromic interlayer has a three-layer structure of a top layer, a middle layer and a bottom layer. The top layer and the bottom layer are transparent conductive glass or a transparent conductive flexible film. The middle layer is a gel-state electrochromic layer, and the middle layer can change color under the action of voltage. The number of photoelectric sensors is greater than five, and the installation locations of the photoelectric sensors include the roof ceiling, the top of the car seat, the rear compartment, the rear window, and the rear seat backrest. The control unit controls the power-on state and input voltage of the electrochromic interlayer through a series-parallel circuit.

[0030] See also Figure 2 The present invention also discloses a method for changing the color of a front windshield of an automobile based on electrochromism, which is applied to any of the above-mentioned devices for changing the color of a front windshield of an automobile based on electrochromism, and comprises the following steps:

[0031] The photoelectric sensor senses the irradiated light and forms a light signal to be sent to the control unit;

[0032] The control unit analyzes the light intensity and irradiation angle according to the light signal sent by the photoelectric sensor;

[0033] The control unit controls the on / off circuit and voltage of each electrochromic interlayer according to the light intensity and irradiation angle;

[0034] The electrochromic interlayer in the strong light area of ​​the front windshield changes color to reduce and eliminate the impact of incident or reflected strong light.

[0035] Specifically, the control unit determines the strong light position of the windshield through the difference in light signal strength of different photoelectric sensors, controls the color change of the electrochromic interlayer in the strong light area of ​​the windshield, and changes the color change depth according to the strength of the strong light.

[0036] The control unit determines that the light signal intensity is 10 or above levels. Within 2 levels, it is a normal signal, and greater than 2 levels, it is an abnormal signal. The signal level is obtained by subtracting the weakest light intensity value from the strongest light intensity value and then performing lg10.

[0037] The control unit controls the voltage of the electrochromic interlayer to 0.7V, 0.8V, 0.9V, 1V 1.1V, 1.2V, 1.3V, and 1.4V according to the intensity of the light signal sent by the photoelectric sensor, which corresponds to 3, 4, 5, 6, 7, 8, 9, and 10 level signals respectively.

[0038] According to the light signal sent by the photoelectric sensor, the control unit controls the voltage input to the specified partition of the windshield, and the voltage is determined according to the light intensity of the light signal; the electrochromic interlayer in the strong light area of ​​the windshield begins to change color rapidly after the voltage is input, and the stronger the voltage, the darker the color, while the windshield always remains transparent.

[0039] When the incident or reflected strong light disappears, the photoelectric sensor senses the external light and forms a light signal to send to the control unit. The control unit analyzes the light intensity and illumination angle according to the light signal, and controls the circuit of the electrochromic interlayer in the strong light area in front of the windshield to cut off power or input reverse voltage according to the light intensity and illumination angle of the strong light disappearing, so as to achieve fading of the strong light area in front of the windshield.

[0040] After the electrochromic interlayer is input with a voltage of 0.7V, the corresponding front windshield partition area can achieve a modulation amplitude of 3% in the blue light band, 9% in the green light band, and 10% in the red light band. After the electrochromic interlayer is input with a voltage of 1.4V, the corresponding front windshield partition area can achieve a modulation amplitude of 10% in the blue light band, 30% in the green light band, and 70% in the red light band. For every 0.1V increase in the input voltage of the electrochromic interlayer, the modulation amplitude of the blue light band in the corresponding front windshield partition area increases by 1%, the modulation amplitude of the green light band increases by 3%, and the modulation amplitude of the red light band increases by 10%.

[0041] In summary, the electrochromic interlayer of the present invention is evenly arranged in multiple partitions of the front windshield, the photoelectric sensor senses the external irradiation light, and forms an optical signal to send to the control unit, the control unit analyzes the light intensity and irradiation angle according to the optical signal, and controls the circuit on-off and voltage of each electrochromic interlayer according to the light intensity and irradiation angle, so that the electrochromic interlayer in the strong light area of ​​the front windshield changes color, reducing and eliminating the impact of incident or reflected strong light.

[0042] The above description is a detailed description of the preferred feasible embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modified changes completed under the technical spirit disclosed by the present invention should fall within the patent scope covered by the present invention.

Claims

1. A car front windshield color changing device based on electrochromism, characterized in that: The invention comprises an electrochromic module, a photoelectric sensor and a control unit. The electrochromic module comprises a plurality of electrochromic interlayers, the electrochromic interlayers are evenly arranged in a plurality of partitions of the front windshield, the photoelectric sensor and the control unit are arranged in the vehicle compartment, and the electrochromic interlayers and the photoelectric sensor are respectively connected to the control unit. The photoelectric sensor is used to sense external light and form a light signal to send to the control unit. The control unit is used to analyze the light intensity and illumination angle according to the light signal sent by the photoelectric sensor, and control the circuit on-off and voltage of each electrochromic interlayer, so that the electrochromic interlayer in the strong light area of ​​the front windshield changes color, reducing and eliminating the impact of incident or reflected strong light.

2. The electrochromic automobile front windshield color changing device according to claim 1, characterized in that: The electrochromic interlayer is a conductive interlayer filled with a color-changing liquid or a conductive interlayer embedded with an electrochromic film.

3. The electrochromic automobile front windshield color changing device according to claim 1, characterized in that: The electrochromic interlayer has a three-layer structure of a top layer, a middle layer and a bottom layer. The top layer and the bottom layer are transparent conductive glass or transparent conductive flexible film, and the middle layer is a gel-state electrochromic layer. The middle layer changes color under the action of voltage.

4. The electrochromic automobile front windshield color changing device according to claim 1, characterized in that: The number of photoelectric sensors is greater than five, and the installation locations of the photoelectric sensors include the roof ceiling, the top of the car seat, the rear compartment, the rear window, and the rear seat back.

5. The electrochromic automobile front windshield color changing device according to claim 1, characterized in that: The control unit controls the power-on state and input voltage of the electrochromic interlayer through a series-parallel circuit.

6. A method for changing the color of a car windshield based on electrochromism, applied to the device for changing the color of a car windshield based on electrochromism according to any one of claims 1 to 5, characterized in that: The following steps are involved: The photoelectric sensor senses the irradiated light and forms a light signal to be sent to the control unit; The control unit analyzes the light intensity and irradiation angle according to the light signal sent by the photoelectric sensor; The control unit controls the on / off circuit and voltage of each electrochromic interlayer according to the light intensity and irradiation angle; The electrochromic interlayer in the strong light area of ​​the front windshield changes color to reduce and eliminate the impact of incident or reflected strong light.

7. The method for changing the color of the automobile front windshield based on electrochromism according to claim 6, characterized in that: The control unit determines the strong light position of the windshield through the difference in light signal strength of different photoelectric sensors, controls the color change of the electrochromic interlayer in the strong light area of ​​the windshield, and changes the color depth according to the strength of the strong light.

8. The method for changing the color of the automobile front windshield based on electrochromism according to claim 6, characterized in that: The control unit determines that the light signal intensity is 10 or above levels. Within 2 levels, it is a normal signal, and greater than 2 levels, it is an abnormal signal. The signal level is obtained by subtracting the weakest light intensity value from the strongest light intensity value and then performing lg10.

9. The method for changing the color of the automobile front windshield based on electrochromism according to claim 6, characterized in that: The control unit controls the voltage of the electrochromic interlayer to 0.7V, 0.8V, 0.9V, 1V1.1V, 1.2V, 1.3V, and 1.4V according to the intensity of the light signal sent by the photoelectric sensor, which corresponds to 3, 4, 5, 6, 7, 8, 9, and 10 level signals respectively.

10. The method for changing the color of the automobile front windshield based on electrochromism according to claim 6, characterized in that: According to the light signal sent by the photoelectric sensor, the control unit controls the voltage input to the designated partition of the front windshield, and the voltage magnitude is determined according to the light intensity of the light signal; The electrochromic interlayer in the bright light area of ​​the windshield begins to change color quickly after voltage is input. The stronger the voltage, the darker the color, while the windshield always remains transparent.

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