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US 11,628,709 B2Granted
Anti-glare device, control method and vehicle
AssigneeBoe Technology Group Co., Ltd.
InventorsNaifu Wu, Xitong Ma, Lixin Kou
Life of this patent
Estimating the term…
Abstract
The present disclosure provides an anti-glare device, a control method and a vehicle. The anti-glare device includes a sensing circuit, a driving circuit and an electrically-controlled color-variable thin film. The sensing circuit is configured to acquire status information about the vehicle in a running state. The driving circuit is configured to generate a driving signal for the electrically-controlled color-variable thin film in accordance with the status information. The electrically-controlled color-variable thin film is arranged on a front windshield of the vehicle and configured to change a transmittance to external light beam in accordance with the driving signal.
Claims14
An anti-glare device for a vehicle, comprising:
- a sensing circuit;
- a driving circuit;
- and
- an electrically-controlled color-variable thin film,
- wherein the sensing circuit is configured to acquire status information about the vehicle in a running state, the driving circuit is configured to generate a driving signal for the electrically-controlled color-variable thin film in accordance with the status information,
- wherein the electrically-controlled color-variable thin film is disposed on a front windshield of the vehicle and is configured to change a transmittance to external light beam in accordance with the driving signal,
- wherein the electrically-controlled color-variable thin film comprises a first transparent electrode layer, a second transparent electrode layer, and an electrically-controlled color-variable layer disposed between the first transparent electrode layer and the second transparent electrode layer,
- wherein each of the first transparent electrode layer and the second transparent electrode layer consists of a plurality of transparent strip electrodes, and each transparent strip electrode of the first transparent electrode layer is arranged opposite to a corresponding transparent strip electrode of the second transparent electrode layer,
- wherein the status information comprises an irradiation direction of the external light beam,
- wherein the sensing circuit comprises a wide-angle camera arranged on a vehicle body and configured to take an image in front of the vehicle, perform grayscale processing to treatment, determine relative coordinates in the image where the external light beam has an intensity exceeding an intensity threshold, and calculate highlight coordinates of the external light beam having the intensity exceeding the intensity threshold in combination with a position of the wide-angle camera on the vehicle body, so as to acquire the irradiation direction,
- wherein the driving circuit is configured to determine a position of a color-variable region on the electrically-controlled color-variable thin film in accordance with the irradiation direction,
- wherein the electrically-controlled color-variable thin film is further configured to supply power alternately to transparent strip electrodes of the first transparent electrode layer within the color-variable region, so as to form a plurality of light-shielding stripes spaced from each other,
- wherein the status information further comprises a velocity v of the vehicle, a distance between the vehicle and a central line of a road viewed by the driver through the color-variable region, and a movement direction of the central line of the road relative to the driver viewed by the driver through the color-variable region, and the central line of the road is a central line between two parts of the road in two opposite running directions respectively,
- wherein the sensing circuit further comprises a vehicle velocity sensor and a binocular camera,
- wherein the vehicle velocity sensor is configured to detect the velocity v of the vehicle,
- wherein the binocular camera comprises two cameras arranged at surfaces of two rearview mirrors facing a head of the vehicle respectively, and configured to take the images through the two cameras, compare the images taken by the two cameras with each other, calculate the distance between the vehicle and the central line of the road viewed by the driver through the color-variable region, and identify the movement direction of the central line of the road relative to the driver viewed by the driver through the color-variable region by comparing the images taken by the two cameras with each other, and
- wherein the driving circuit is further configured to:
- determine an arrangement direction of the light-shielding stripes in accordance with the movement direction of the central line of the road relative to the driver viewed by the driver through the color-variable region, the arrangement direction of the light-shielding stripes being identical to the movement direction of the central line of the road relative to the driver viewed by the driver through the color-variable region;
- determine a distance z between adjacent light-shielding stripes in accordance with the distance x between the vehicle and the central line of the road viewed by the driver through the color-variable region through the equation
- z
- =
- sy
- x
- +
- y
- ,
- where s is a constant value within a range [50 cm, 100 cm], and y represents a distance between the driver and the front windshield;
- determine a flicker frequency f of each light-shielding stripe in accordance with the velocity v of the vehicle through the equation
- f
- =
- v
- s
- ,
- the flicker frequency being the quantity of times of each light-shielding stripes moving from a start position to an ending position of the color-variable region in unit time, a movement direction of each light-shielding stripe from the start position to the ending position being identical to the movement direction of the central line of the road relative to the driver viewed by the driver through the color-variable region;
- and
- take the arrangement direction of the light-shielding stripes, the distance between adjacent light-shielding stripes and the flicker frequency f as driving information.
33 more elements
A control method for the anti-glare device, wherein the anti-glare device comprises:
- a sensing circuit
- a driving circuit and
- an electrically-controlled color-variable thin film, wherein the sensing circuit is configured to acquire status information about the vehicle in a running state, the driving circuit is configured to generate a driving signal for the electrically-controlled color-variable thin film in accordance with the status information,
- wherein the electrically-controlled color-variable thin film is disposed on a front windshield of the vehicle and is configured to change a transmittance to external light beam in accordance with the driving signal,
- wherein the electrically-controlled color-variable thin film comprises a first transparent electrode layer, a second transparent electrode layer, and an electrically-controlled color-variable layer disposed between the first transparent electrode layer and the second transparent electrode layer,
- wherein each of the first transparent electrode layer and the second transparent electrode layer consists of a plurality of transparent strip electrodes, and each transparent strip electrode of the first transparent electrode layer is arranged opposite to a corresponding transparent strip electrode of the second transparent electrode layer,
- wherein the status information comprises an irradiation direction of the external light beam,
- wherein the sensing circuit comprises a wide-angle camera arranged on a vehicle body and configured to take an image in front of the vehicle, perform grayscale processing to treatment, determine relative coordinates in the image where the external light beam has an intensity exceeding an intensity threshold, and calculate highlight coordinates of the external light beam having the intensity exceeding the intensity threshold in combination with a position of the wide-angle camera on the vehicle body, so as to acquire the irradiation direction,
- wherein the driving circuit is configured to determine a position of a color-variable region on the electrically-controlled color-variable thin film in accordance with the irradiation direction,
- wherein the control method comprises:
- acquiring status information about a vehicle in a running state;
- generating a driving signal for an electrically-controlled color-variable thin film in accordance with the status information, and transmitting the driving signal to the electrically-controlled color-variable thin film;
- and
- supplying power alternately to transparent strip electrodes in a color-variable region in a plurality of transparent strip electrodes of a first transparent electrode layer of the electrically-controlled color-variable thin film, so as to form a plurality of light-shielding stripes spaced apart from each other,
- wherein the status information further comprises a velocity v of the vehicle, a distance between the vehicle and a central line of a road viewed by the driver through the color-variable region, and a movement direction of the central line of the road relative to the driver viewed by the driver through the color-variable region, and the central line of the road is a central line between two parts of the road in two opposite running directions respectively, and
- wherein the generating the driving signal for the electrically-controlled color-variable thin film in accordance with the status information comprises:
- determining an arrangement direction of the light-shielding stripes in accordance with the movement direction of the central line of the road relative to the driver viewed by the driver through the color-variable region, the arrangement direction of the light-shielding stripes being identical to the movement direction of the central line of the road relative to the driver viewed by the driver through the color-variable region;
- determining a distance z between adjacent light-shielding stripes in accordance with the distance x between the vehicle and the central line of the road viewed by the driver through the color-variable region through the equation
- z
- =
- sy
- x
- +
- y
- ,
- where s is a constant value within a range [50 cm, 100 cm], and y represents a distance between the driver and the front windshield;
- determining a flicker frequency f of each light-shielding stripe in accordance with the velocity v of the vehicle through the equation
- f
- =
- v
- s
- ,
- the flicker frequency being the quantity of times of each light-shielding stripes moving from a start position to an ending position of the color-variable region in unit time, a movement direction of each light-shielding stripe from the start position to the ending position being identical to the movement direction of the central line of the road relative to the driver viewed by the driver through the color-variable region;
- and
- taking the arrangement direction of the light-shielding stripes, the distance between adjacent light-shielding stripes and the flicker frequency f as driving information.
32 more elements
Dependencies are inferred from the claim text.