CN109878304B - Sun visor, sun visor control method and automobile - Google Patents
Sun visor, sun visor control method and automobile Download PDFInfo
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- CN109878304B CN109878304B CN201910252086.XA CN201910252086A CN109878304B CN 109878304 B CN109878304 B CN 109878304B CN 201910252086 A CN201910252086 A CN 201910252086A CN 109878304 B CN109878304 B CN 109878304B
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Abstract
The invention provides a sun shield, a sun shield control method and an automobile, wherein the sun shield comprises a sun shield body, an image processing module and a control module; the sun visor body comprises a first substrate and a second substrate which are oppositely arranged, a liquid crystal layer is arranged between the first substrate and the second substrate, a first electrode is arranged on one side of the first substrate close to the liquid crystal layer, and a second electrode is arranged on one side of the second substrate close to the liquid crystal layer; the liquid crystal layer can change the light transmittance of the sunshading board; the image processing module configured to determine a human eye gaze state; the control module is configured to control the light transmittance of the liquid crystal layer according to the human eye gazing state. The invention can automatically adjust the light transmittance of the sun shield body based on the human eye image, has better sun-shielding effect compared with the traditional sun shield, reduces the influence of the outside on the visual field of a user, and improves the safety and the convenience.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a sun shield, a sun shield control method and an automobile.
Background
With the rapid development of social economy, automobiles are already important vehicles for family trip; however, in the using process of the automobile, some problems also exist, such as that in sunny days with sunny and high-illumination, a driver drives towards the sun, and the sunlight is dazzling; when the vehicle runs at night, the high beam of the oncoming vehicle is also unavailable; the problems often bring about greater potential safety hazards and threaten the safety of personnel on the vehicle;
the prior art sets up a rectangle opaque sunshading board in car owner's driver and copilot top position, and the material is plastics usually, needs manual the turning over and manual regulation sunshading board angle to shelter from sunshine during the use, and the mode of manual adjustment sunshading board leads to driver's attention to take place the transition like this easily, has increased the probability of occurence of failure, the sunshading board also can influence driver's sight in the sunshade.
Disclosure of Invention
The invention provides a sun shield, a sun shield control method and an automobile, and aims to solve the technical problem that the sun shield can affect the visual field of a user while blocking sunlight in the prior art.
In order to solve the problems, the invention discloses a sun visor which comprises a sun visor body, an image processing module and a control module;
the sun visor body comprises a first substrate and a second substrate which are oppositely arranged, a liquid crystal layer is arranged between the first substrate and the second substrate, a first electrode is arranged on one side of the first substrate close to the liquid crystal layer, and a second electrode is arranged on one side of the second substrate close to the liquid crystal layer; the liquid crystal layer can change the light transmittance of the sunshading board according to the electric field formed between the first electrode and the second electrode;
the image processing module is configured to acquire a human eye image and determine a human eye gazing state according to the human eye image;
the control module is coupled with the first electrode and the second electrode respectively and is configured to adjust voltages on the first electrode and the second electrode according to the human eye watching state so as to control light transmittance of the liquid crystal layer.
Optionally, the image processor is configured to acquire eye images according to a preset period, and according to the eye images acquire an eye exposure area, and according to the eye exposure area and a relation between the preset areas, the eye watching state is determined, when the eye exposure area is larger than or equal to the preset area, the eye watching state is determined to be a first state, and when the eye exposure area is smaller than the preset area, the eye watching state is determined to be a second state.
Optionally, the control module is configured to adjust voltages on the first electrode and the second electrode to control the light transmittance of the liquid crystal layer to decrease when the human eye gaze state is a second state.
Optionally, the control module is further configured to adjust the opening angle of the visor body when the light transmittance of the liquid crystal layer is less than or equal to a first light transmittance and the eye watching state is a second state, so that the eye watching state is adjusted from the second state to the first state; the first transmittance is a maximum transmittance that affects a normal field of view.
Optionally, the device further comprises a photoelectric sensing module;
the photoelectric sensing module is configured to acquire external light intensity and physical parameters of light rays incident to the sun visor body, and the physical parameters comprise light intensity and light ray incidence angle;
the control module is further configured to open the sun visor body to a preset opening angle when the external light intensity is greater than a first preset light intensity; determining the light intensity of the light incident to human eyes according to the physical parameters of the light and the opening angle of the sun shield body; and when the light intensity incident to the human eyes is greater than a second preset light intensity, adjusting the voltages on the first electrode and the second electrode according to the relation between the light intensity incident to the human eyes and the second preset light intensity so as to control the light transmittance of the liquid crystal layer.
Optionally, the control module is further configured to close the sun visor body when the external light intensity is less than or equal to a first light intensity threshold.
Optionally, the sun visor body is divided into a plurality of adjustment areas, and the first electrode and the second electrode in the same adjustment area are adjusted synchronously;
the control module is configured to sequentially adjust the voltage on the first electrode and the voltage on the second electrode in each of the adjustment regions at preset time intervals so as to sequentially control the light transmittance of the liquid crystal layer in each of the adjustment regions.
In order to solve the problems, the invention also discloses an automobile which comprises the sun visor.
In order to solve the above problems, the present invention also discloses a sun visor control method, comprising:
acquiring a human eye image, and determining a human eye gazing state according to the human eye image;
and adjusting the voltage on the sun shield according to the human eye watching state so as to control the light transmittance of the sun shield.
Optionally, the method further comprises:
acquiring external light intensity and physical parameters of light rays incident on the sun shield, wherein the physical parameters comprise the light intensity and the light ray incidence angle;
when the external light intensity is greater than a first preset light intensity, opening the sun shield to a preset opening angle;
determining the light intensity of the incident light to human eyes according to the physical parameters of the light and the opening angle of the sun shield;
when the light intensity incident to the human eyes is larger than the second preset light intensity, the voltage on the sun shield is adjusted according to the relation between the light intensity incident to the human eyes and the second preset light intensity so as to control the light transmittance of the sun shield.
Compared with the prior art, the invention has the following advantages:
the sun shield provided by the embodiment of the invention can automatically adjust the light transmittance of the sun shield body based on the human eye image, has a better sun-shielding effect compared with the traditional sun shield, and improves the safety and convenience while reducing the influence of the outside on the visual field of a user.
According to the sun visor disclosed by the embodiment of the invention, the light transmittance of all or part of the adjusting area of the sun visor is adjusted in real time by utilizing the light intensity information acquired by the photoelectric sensing module and/or the eyeball exposure area acquired by the eyeball tracking technology, so that the response time is prolonged compared with that of the traditional sun visor.
Drawings
Fig. 1 is a structural view of a sun visor according to a first embodiment of the present invention;
fig. 2 is a structural view of a sun visor body according to a first embodiment of the present invention;
fig. 3 is a structural view of another sun visor according to the first embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a principle of adjusting transmittance of a dye liquid crystal layer according to a first embodiment of the present invention;
fig. 5(a) is a schematic view illustrating an exposed area of an eyeball under normal light according to an embodiment of the present invention;
FIG. 5(b) is a diagram illustrating an exposed area of an eyeball under light stimulation according to an embodiment of the present invention;
fig. 6 is a flowchart illustrating steps of a sun visor control method according to a third embodiment of the present invention;
fig. 7 is a flow chart illustrating sub-steps of a sun visor control method according to a third embodiment of the present invention;
fig. 8 is a flow chart illustrating sub-steps of a sun visor control method according to a third embodiment of the present invention;
fig. 9 is a flow chart illustrating sub-steps of a sun visor control method according to a third embodiment of the present invention;
fig. 10 is a flowchart illustrating steps of a sun visor control method according to a third embodiment of the present invention;
fig. 11 is a flow chart illustrating sub-steps of a sun visor control method according to a third embodiment of the present invention;
fig. 12 is a flowchart illustrating steps of a sun visor control method according to a third embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example one
Referring to fig. 1, a structural diagram of a sun visor according to a first embodiment of the present invention is shown, including a sun visor body, an image processing module and a control module; the liquid crystal layer can change the light transmittance of the sun visor according to an electric field formed between the first electrode and the second electrode; the image processing module is used for acquiring a human eye image and determining a human eye gazing state according to the human eye image; the control module is coupled with the first electrode and the second electrode respectively and is configured to adjust voltages on the first electrode and the second electrode according to the human eye watching state so as to control light transmittance of the liquid crystal layer.
The image processing module can be arranged in front of the visual field of a user, and is configured to acquire an eye image of the user by using an eye tracking technology, acquire an eye exposure area according to the eye image, and determine the eye watching state according to the relation between the eye exposure area and a preset area. When eyeball exposed area is larger than or equal to the preset area, the human eye watching state is determined to be the first state, and when the eyeball exposed area is smaller than the preset area, the human eye watching state is determined to be the second state. The preset area is the eyeball exposed area of human eyes under the normal condition of light, specifically, different preset areas can be set according to the eyeball exposed areas of different users, and the user can be selected to determine the eyeball exposed area of the user by utilizing the image processing module before the user gets on the vehicle or the sun visor body is opened, so that the preset area is determined. After the sun visor body is opened, the image processing module is utilized to acquire the eyeball exposure area of a user in real time based on an eyeball tracking technology, when the eyeball exposure area of the user is smaller than a preset area, the light transmittance of the sun visor body is over high, the eyes of the user bear stronger light, and the light transmittance of the sun visor body needs to be reduced. When the exposed area of the user is equal to or larger than the preset area, the user's view field is not affected by light rays at the moment, and the light shielding plate body can be continuously kept at the current light transmittance or be folded by combining other conditions.
Optionally, an infrared processing module is used to obtain the eye image of the user instead of the image processing module.
Referring to the schematic view of the visor body shown in fig. 2, the visor body includes a first substrate 101, a second substrate 102, a first electrode 103, a second electrode 104, and a liquid crystal layer 105. Optionally, the liquid crystal layer is a dye liquid crystal which comprises negative liquid crystal molecules with a chiral agent and a dichroic dye; when the first electrode and the second electrode do not apply an electric field to the dye liquid crystal, the negative liquid crystal molecules with the chiral agent are vertical to the first substrate and the second substrate, the dichroic dye is vertical to the first substrate and the second level plate along with the liquid crystal molecules, light is absorbed by the dye liquid crystal, and the sun visor body has complete light transmittance; when the first electrode and the second electrode apply an electric field to the dye liquid crystal, the negative liquid crystal molecules are spirally arranged parallel to the first substrate and the second substrate under the action of the electric field force, the dichroic dye is also spirally arranged along with the liquid crystal molecules, and incident light in different polarization directions is absorbed by the dichroic dye in the long axis direction of the corresponding sun visor body, so that the light transmittance of the liquid crystal layer is adjusted.
The control module is coupled with the first electrode and the second electrode of the sunshading board body and is configured to adjust the voltage on the first electrode and the second electrode according to the obtained human eye watching state so as to control the light transmittance of the liquid crystal layer; optionally, when the human eye watching state is a second state, adjusting voltages on the first electrode and the second electrode to control the light transmittance of the liquid crystal layer to decrease; optionally, when the human eye gaze state is a first state, the voltages on the first electrode and the second electrode are maintained to maintain the current transmittance.
Optionally, the control module is further configured to adjust the opening angle of the sun visor body when the light transmittance of the liquid crystal layer is less than or equal to a first light transmittance and the eye watching state is a second state, so that the eye watching state is adjusted from the second state to the first state; the first transmittance is a maximum transmittance that affects a normal field of view. In the embodiment of the invention, when the light transmittance of the liquid crystal layer is smaller than the first light transmittance and the watching state of the human eyes is the second state, the opening angle of the sunshading board body cannot better shield the external light intensity, and the opening angle of the sunshading board body needs to be adjusted; optionally, the placing plane of the sun visor is adjusted to be perpendicular to or nearly perpendicular to most of incident light rays of the outside, so that the sun visor body can shield most of the incident light rays, and the human eye watching state is adjusted to be in the first state. The first transmittance is a maximum transmittance that affects a normal field of view.
Optionally, the sun visor further comprises a photoelectric sensing module;
the photoelectric sensing module is configured to acquire external light intensity and physical parameters of light rays incident to the sun visor body, and the physical parameters comprise light intensity and light ray incidence angle;
the control module is further configured to open the sun visor body to a preset opening angle when the external light intensity is greater than a first preset light intensity; determining the light intensity of the light incident to human eyes according to the physical parameters of the light and the opening angle of the sun shield body; and when the light intensity incident to the human eyes is greater than a second preset light intensity, adjusting the voltages on the first electrode and the second electrode according to the relation between the light intensity incident to the human eyes and the second preset light intensity so as to control the light transmittance of the liquid crystal layer.
In the embodiment of the present invention, the photoelectric sensing module is connected to the processing module, and optionally, the photoelectric sensing module includes a plurality of photoelectric sensors, wherein a part of the photoelectric sensors are arranged in front of the field of view of the user for acquiring the external light intensity; the remaining part photoelectric sensor is arranged on one side, far away from a user, of the sun visor body and used for acquiring physical parameters of light rays incident to the sun visor body, and the physical parameters comprise light intensity and light ray incidence angles. The number of the photoelectric sensors arranged in front of a user can be two, the photoelectric sensors are used for acquiring external light intensity, when the external light intensity is greater than a first preset light intensity, the control module controls the sun visor body to be opened to a preset opening angle, and the preset opening angle can be an angle perpendicular to the visual field of the user; the first preset light intensity is the minimum external light intensity affecting the visual field of the user. After the sun visor body is opened, the control module adjusts the sun visor body to a proper angle according to the light rays and the light ray incidence angles, obtained by other photoelectric sensors arranged on one side of the sun visor body, and the light rays and the light ray incidence angles are incident on the sun visor body. Suitable angles described herein may be angles perpendicular to the angle of incidence of the light.
The control module is also configured to determine the light intensity incident to human eyes according to the physical parameters of the light incident to the sun visor body and the opening angle of the sun visor body; optionally, when most of the external light can vertically or nearly vertically irradiate on the sun visor body, the sun visor can shield most of the light, and the light intensity incident to human eyes is weak; on the contrary, when most of the external light cannot vertically irradiate on the sun visor body or cannot be close to vertically irradiate on the sun visor body, the sun visor can only shield a small part of the light, and the light intensity incident to human eyes is strong; when the external light intensity is weaker, the light intensity incident to human eyes is also smaller, and conversely, when the external light intensity is stronger, the light intensity incident to human eyes is also stronger. At the moment, when the light intensity incident to the human eyes is greater than a second preset light intensity, the voltages on the first electrode and the second electrode are adjusted according to the relation between the light intensity incident to the human eyes and the second preset light intensity so as to control the light transmittance of the liquid crystal layer, wherein the second preset light intensity is the minimum light intensity incident to the human eyes and influences the visual field of a user; optionally, when the difference between the light intensity incident to the human eye and a second preset light intensity is larger, the voltage applied to the first electrode and the second electrode is larger, and at this time, the light transmittance of the liquid crystal layer is controlled to be changed more; in contrast, when the difference between the intensity of light incident to the human eye and the second preset intensity is smaller, the voltage applied to the first electrode and the second electrode is smaller, and at this time, the transmittance of the liquid crystal layer is controlled to be changed less.
Optionally, the control module is further configured to close the sun visor body when the external light intensity is less than or equal to the first light intensity threshold.
In the embodiment of the invention, a part of the photoelectric sensors in the photoelectric sensing module is arranged in front of the visual field of a user and used for acquiring the external light intensity and transmitting the acquired external light intensity to the control module, a first light intensity threshold value is stored in the control module, when the acquired external light intensity is smaller than or equal to the first light intensity, the acquired external light intensity is incident to the human eyes and cannot influence the visual field of the user, and the control module closes the sun shield body.
Optionally, the sun visor body is divided into a plurality of adjustment areas, and the first electrode and the second electrode in the same adjustment area are adjusted synchronously;
the control module is configured to sequentially adjust the voltage on the first electrode and the voltage on the second electrode in each of the adjustment regions at preset time intervals so as to sequentially control the light transmittance of the liquid crystal layer in each of the adjustment regions.
In the embodiment of the invention, in some special environments, the whole shading rate of the sun visor body is only regulated, the light transmittance is required to be regulated to be the lowest, at the moment, the incident light intensity of only a part of regulating areas of the sun visor body is stronger, the visual field of a user is influenced, the incident light of other areas of the sun visor body is weaker, and the light transmittance does not need to be regulated in the areas; in view of this, the embodiment of the present invention divides the sun visor body into a plurality of adjustment regions, and the first electrode and the second electrode in the same region can be adjusted synchronously to adjust the light transmittance of the liquid crystal layer. Optionally, when the vehicle runs on a climbing slope, the external light intensity only affects the lower side area of the sun visor, the control module sequentially adjusts the voltage on the first electrode and the second electrode in each of the adjustment areas on the lower side of the sun visor body according to a preset time interval, so as to sequentially control the light transmittance of the liquid crystal layer in each of the adjustment areas of the sun visor body. Specifically, how to determine the adjustment area affected by the external light intensity can be determined by acquiring human eye images of a user when the human eye of the user turns to the sun visor body based on an eyeball tracking technology by using the image processing module, and when the human eye of the user turns to the upper side adjustment area of the sun visor body, the human eye watching state is further determined according to the human eye images acquired by the image processing module, and whether the light transmittance of the adjustment area is adjusted or not is determined according to the human eye watching state. And when the human eye watching state is a second state, the light transmittance of the adjusting area is reduced, and when the human eye watching state is a first state, the light transmittance of the adjusting area is maintained. Optionally, physical parameters of external light intensity and light rays incident to each adjusting region of the sun visor body are obtained by the photoelectric sensing module, and the physical parameters include the light intensity and the light ray incidence angle; the light intensity of the light entering the human eyes from each adjusting area is determined by combining the external light intensity, the light intensity entering the adjusting areas and the light ray incidence angle, and the control module adjusts the voltage on the first electrode and the second electrode according to the light intensity entering the human eyes and the second preset light intensity so as to control the light transmittance of the adjusting areas.
In the embodiment of the invention, optionally, when the sun visor body is opened, an image processing module installed in front of human eyes is used for acquiring images of the human eyes, the watching state of the human eyes is determined according to an eyeball tracking technology, and according to the watching state of the human eyes, the control module controls the first electrode and the second electrode to apply the same voltage to the whole liquid crystal layer so as to control the whole liquid crystal layer to have the same light transmittance. The method comprises the steps of utilizing an image processing module to watch the state of human eyes in real time, when the state of the human eyes is in a second state, sequentially adjusting the voltage on a first electrode and a second electrode in each adjusting area according to a preset period to sequentially control the light transmittance of a liquid crystal layer of each adjusting area, adjusting once the voltage on the adjusting areas, utilizing the image processing module to obtain the state of the human eyes, and stopping adjustment until the state of the human eyes is adjusted to be in the first state from the second state. When all the adjusting areas are adjusted, the obtained watching state of the human eyes is still in the second state, the opening angle of the sun shield body can be adjusted to reduce the light intensity incident to the human eyes and change the incident angle of the light rays incident to the human eyes. After the opening angle of the sun visor body is adjusted, the eye watching state is obtained by the image processing module, the method for adjusting the light transmittance of the liquid crystal layer in each adjusting area is repeated until the eye watching state is adjusted to the first state from the second state, and the adjustment is stopped.
In a specific embodiment, referring to fig. 3, a structural diagram of a sun visor is shown, the sun visor comprising a first substrate 201, a second substrate 202, a first electrode 203, a second electrode 204, a dye liquid crystal layer 205, an image processing module 206, a control module 207, and a photo sensor module 208; the image processing module is used for collecting human eye images to obtain human eye eyeball exposed areas, utilizes the eyeball exposed areas to determine human eye watching states, and when the eyeball exposed areas are larger than or equal to preset areas, the human eye watching states are determined to be in a first state, and when the eyeball exposed areas are smaller than the preset areas, the human eye watching states are determined to be in a second state. And will the people eye is watched the state and is transmitted for control module, photoelectric sensing module is used for acquireing the light intensity information, and will the light intensity information transmits for control module, control module according to people eye is watched the state and/or the light intensity information to first electrode with voltage is applyed to the second electrode, in order to adjust the light transmittance of whole or partial region of dye liquid crystal layer to realize the shading and guarantee user's field of vision.
Referring to fig. 4, a light transmittance adjusting principle of the dye liquid crystal layer is shown, the light transmittance of the dye liquid crystal layer is gradually reduced along with the increase of the applied voltage, the dye liquid crystal layer is fully transparent when the voltage is not applied or the voltage is very small, the voltage range can be called a strong light eye-pricking region, when the voltage is adjusted to be larger, the light transmittance is lower, the normal visual field can be influenced, the voltage range is called a visual field reduction region, the voltage adjusting region is located between the two regions, and the liquid crystal voltage is mainly adjusted in the voltage adjusting region.
Referring to fig. 5(a) and 5(b), schematic diagrams of an eyeball tracking technique are shown, wherein fig. 5(a) is an eyeball exposure area under normal light, and fig. 5(b) is an eyeball exposure area under light stimulation. The image processing module determines that the human eyes are focusing on distant objects through an eyeball tracking algorithm, outputs the exposed area size of the eyeballs in a processing period delta T at the moment, and compares the exposed area size with a preset threshold SThreshold(s)(eyeball area when squinting-human eyes can conditioned reflex type squinting to protect oneself when receiving external light stimulation) to judge whether the user is squinting, if S is less than or equal to SThreshold(s)The display device is characterized in that a user is irradiated by strong light, the image processing module sends an instruction to the control module to adjust corresponding driving voltage, and therefore the purpose of adjusting the light transmittance of the light screen body is achieved. Said SThreshold(s)The exposed area of eyeball of human eye under normal light condition is specifiedCan carry out different S according to the eyeball exposed areas of different usersThreshold(s)The setting of (2) can be selected to determine the eyeball exposed area of the user by using the image processing module when the user gets on the vehicle or before the sun visor body is opened, thereby determining the SThreshold(s)。
The sun shield provided by the embodiment of the invention can automatically adjust the light transmittance of the sun shield body based on the human eye image, has a better sun-shielding effect compared with the traditional sun shield, and improves the safety and convenience while reducing the influence of the outside on the visual field of a user.
According to the sun visor disclosed by the embodiment of the invention, the light transmittance of all or part of the adjusting area of the sun visor is adjusted in real time by utilizing the light intensity information acquired by the photoelectric sensing module and/or the eyeball exposure area acquired by the eyeball tracking technology, so that the response time is prolonged compared with that of the traditional sun visor.
Example two
The embodiment of the invention discloses an automobile, which comprises a sun shield, wherein the sun shield comprises a sun shield body, an image processing module and a control module;
the sun visor body comprises a first substrate and a second substrate which are oppositely arranged, a liquid crystal layer is arranged between the first substrate and the second substrate, a first electrode is arranged on one side of the first substrate close to the liquid crystal layer, and a second electrode is arranged on one side of the second substrate close to the liquid crystal layer; the liquid crystal layer can change the light transmittance of the sunshading board according to the electric field formed between the first electrode and the second electrode;
the image processing module is configured to acquire a human eye image and determine a human eye gazing state according to the human eye image;
the control module is coupled with the first electrode and the second electrode respectively and is configured to adjust voltages on the first electrode and the second electrode according to the human eye watching state so as to control light transmittance of the liquid crystal layer.
Image processor is configured to and acquires people's eye image according to predetermineeing the cycle, and according to people's eye image acquires eyeball exposed area, according to eyeball exposed area and predetermine the relation between the area, confirms people's eye state of staring, works as eyeball exposed area is greater than or equal to when predetermineeing the area, confirms people's eye state of staring is the first state, works as eyeball exposed area is less than during the area of predetermineeing, confirm people's eye state of staring is the second state.
The control module is configured to adjust the voltage on the first electrode and the second electrode to control the light transmittance of the liquid crystal layer to be reduced when the human eye gaze state is a second state.
The control module is further configured to adjust the opening angle of the sun visor body when the light transmittance of the liquid crystal layer is smaller than or equal to a first light transmittance and the eye watching state is a second state, so that the eye watching state is adjusted from the second state to the first state; the first transmittance is a maximum transmittance that affects a normal field of view.
The sun visor also comprises a photoelectric sensing module;
the photoelectric sensing module is configured to acquire external light intensity and physical parameters of light rays incident to the sun visor body, and the physical parameters comprise light intensity and light ray incidence angle;
the control module is further configured to open the sun visor body to a preset opening angle when the external light intensity is greater than a first preset light intensity; determining the light intensity of the light incident to human eyes according to the physical parameters of the light and the opening angle of the sun shield body; and when the light intensity incident to the human eyes is greater than a second preset light intensity, adjusting the voltages on the first electrode and the second electrode according to the relation between the light intensity incident to the human eyes and the second preset light intensity so as to control the light transmittance of the liquid crystal layer.
The control module is further configured to close the sun visor body when the external light intensity is smaller than or equal to a first light intensity threshold value.
The sun shield body is divided into a plurality of adjusting areas, and a first electrode and a second electrode in the same adjusting area are synchronously adjusted;
the control module is configured to sequentially adjust the voltage on the first electrode and the voltage on the second electrode in each of the adjustment regions at preset time intervals so as to sequentially control the light transmittance of the liquid crystal layer in each of the adjustment regions.
The sun shield provided by the embodiment of the invention can automatically adjust the light transmittance of the sun shield body based on the human eye image, has a better sun-shielding effect compared with the traditional sun shield, and improves the safety and convenience while reducing the influence of the outside on the visual field of a user.
The light transmittance of all or part of the adjusting area of the sun visor is adjusted in real time by utilizing the light intensity information acquired by the photoelectric sensing module and/or the eyeball exposure area acquired by the eyeball tracking technology.
EXAMPLE III
Referring to fig. 6, an embodiment of the present invention provides a sun shading control method applied to the sun visor described in the first embodiment, where the method includes:
in the embodiment of the invention, the image processing module is used for acquiring the human eye image, the image processing module can be arranged in front of the visual field of the user and is configured to acquire the human eye image of the user by using an eyeball tracking technology, acquire the eyeball exposed area according to the human eye image and determine the human eye gazing state according to the relation between the eyeball exposed area and the preset area. The preset area is the eyeball exposed area of human eyes under the normal condition of light, specifically, different preset areas can be set according to the eyeball exposed areas of different users, and the user can be selected to determine the eyeball exposed area of the user by utilizing the image processing module before the user gets on the vehicle or the sun visor body is opened, so that the preset area is determined.
In the embodiment of the invention, the sunshading board comprises a sunshading board body and a control module, wherein the sunshading board body comprises a first substrate and a second substrate which are oppositely arranged, a liquid crystal layer is arranged between the first substrate and the second substrate, a first electrode is arranged on one side of the first substrate close to the liquid crystal layer, and a second electrode is arranged on one side of the second substrate close to the liquid crystal layer; the liquid crystal layer can change the light transmittance of the sunshading board according to the electric field formed between the first electrode and the second electrode; the control module is coupled with the first electrode and the second electrode respectively and is configured to adjust voltages on the first electrode and the second electrode according to the human eye watching state so as to control light transmittance of the liquid crystal layer.
Referring to fig. 7, the step 301 includes:
In the embodiment of the invention, the preset period can be set according to the requirements of a user, the preset period is in millisecond level and is used for acquiring different human eye images in real time, acquiring different eyeball exposed areas according to the different human eye images and further performing subsequent operations according to the eyeball exposed areas, and a series of action responses are required to be completed instantly to reflect the instantaneity of the sun visor in adjusting the shading rate.
And 3012, determining the gaze state of the human eyes according to the relation between the exposed area of the eyeballs and a preset area.
In the embodiment of the invention, an image processing module arranged in front of the visual field of a user is used for acquiring a human eye image, an eyeball exposed area is acquired based on the human eye image, the human eye watching state is determined according to the relation between the eyeball exposed area and a preset area, when the eyeball exposed area is larger than or equal to the preset area, the human eye watching state is determined to be a first state, and when the eyeball exposed area is smaller than the preset area, the human eye watching state is determined to be a second state. The preset area is the eyeball exposed area of human eyes under the normal condition of light, specifically, different preset areas can be set according to the eyeball exposed areas of different users, and the user can be selected to determine the eyeball exposed area of the user by utilizing the image processing module before the user gets on the vehicle or the sun visor body is opened, so that the preset area is determined. Optionally, when the exposed area of the eyeball is smaller than the preset area, it indicates that the field of vision of the user is affected by the stimulation of the external light intensity to the eyes of the user.
Referring to fig. 8, the step 302 includes:
In the embodiment of the invention, when the determined eye watching state is the second state, the voltages on the first electrode and the second electrode of the sunshading board body are adjusted to control the reduction of the light transmittance of the liquid crystal layer; and when the human eye watching state is adjusted to be the first state from the second state after the light transmittance is adjusted to be reduced, maintaining the applied voltage on the first electrode and the second electrode so as to maintain the current light transmittance.
Referring to fig. 9, the step 302 further includes:
In the embodiment of the invention, when the light transmittance of the liquid crystal layer of the sun visor is smaller than the first light transmittance and the watching state of the human eyes is the second state, it is indicated that the opening angle of the sun visor body cannot better shield the external light intensity, and the opening angle of the sun visor body needs to be adjusted; optionally, the placing plane of the sun visor is adjusted to be perpendicular to or nearly perpendicular to most of incident light of the outside, so that the sun visor body can shield most of the incident light, and the human eye watching state is adjusted to be the first state from the second state. The first transmittance is a maximum transmittance that affects a normal field of view.
Referring to fig. 10, the method further includes:
3031, acquiring external light intensity and physical parameters of light rays incident on the sun shield, wherein the physical parameters comprise the light intensity and the light ray incidence angle;
3032, when the external light intensity is greater than a first preset light intensity, opening the sun shield to a preset opening angle;
3033, determining the light intensity of the incident light to human eyes according to the physical parameters of the light and the opening angle of the sun shield;
3034, when the light intensity incident to the human eyes is greater than the second preset light intensity, adjusting the voltage on the sun shield according to the relationship between the light intensity incident to the human eyes and the second preset light intensity so as to control the light transmittance of the sun shield.
In the embodiment of the invention, the photoelectric sensing module is used for acquiring the external light intensity and the physical parameters of the light rays incident on the sun shield. The photoelectric sensing module is connected with the processing module, optionally, the photoelectric sensing module comprises a plurality of photoelectric sensors, wherein part of the photoelectric sensors are arranged in front of the visual field of a user and used for acquiring external light intensity; the remaining part photoelectric sensor is arranged on one side, far away from a user, of the sun visor body and used for acquiring physical parameters of light rays incident to the sun visor body, and the physical parameters comprise light intensity and light ray incidence angles. The number of the photoelectric sensors arranged in front of a user can be two, the photoelectric sensors are used for acquiring external light intensity, when the external light intensity is greater than a first preset light intensity, the control module controls the sun visor body to be opened to a preset opening angle, and the preset opening angle can be an angle perpendicular to the visual field of the user; the first preset light intensity is the minimum external light intensity affecting the visual field of the user. After the sun visor body is opened, the control module adjusts the sun visor body to a proper angle according to the light rays and the light ray incidence angles, obtained by other photoelectric sensors arranged on one side of the sun visor body, and the light rays and the light ray incidence angles are incident on the sun visor body. Suitable angles described herein may be angles perpendicular to the angle of incidence of the light.
Determining the light intensity incident to human eyes according to the physical parameters of the light incident to the sun visor body and the opening angle of the sun visor body; optionally, when most of the external light can vertically or nearly vertically irradiate on the sun visor body, the sun visor can shield most of the light, and the light intensity incident to human eyes is weak; on the contrary, when most of the external light cannot vertically irradiate on the sun visor body or cannot be close to vertically irradiate on the sun visor body, the sun visor can only shield a small part of the light, and the light intensity incident to human eyes is strong; when the external light intensity is weaker, the light intensity incident to human eyes is also smaller, and conversely, when the external light intensity is stronger, the light intensity incident to human eyes is also stronger. At the moment, when the light intensity incident to the human eyes is greater than a second preset light intensity, the voltages on the first electrode and the second electrode are adjusted according to the relation between the light intensity incident to the human eyes and the second preset light intensity so as to control the light transmittance of the liquid crystal layer, wherein the second preset light intensity is the minimum light intensity incident to the human eyes and influences the visual field of a user; optionally, when the ratio of the light intensity incident to the human eye to a second preset light intensity is larger, the voltage applied to the first electrode and the second electrode is larger, and at this time, the light transmittance of the liquid crystal layer is controlled to be changed more; in contrast, when the ratio of the intensity of light incident to the human eye to the second preset intensity of light is smaller, the voltage applied to the first electrode and the second electrode is smaller, and at this time, the transmittance of the liquid crystal layer is controlled to be smaller.
Referring to fig. 11, the method further includes:
In the embodiment of the invention, a part of the photoelectric sensors in the photoelectric sensing module is arranged in front of the visual field of a user and used for acquiring the external light intensity and transmitting the acquired external light intensity to the control module, a first light intensity threshold value is stored in the control module, when the acquired external light intensity is smaller than or equal to the first light intensity, the acquired external light intensity is incident to the human eyes and cannot influence the visual field of the user, and the control module closes the sun shield body.
Referring to fig. 12, the method further includes:
In the embodiment of the invention, in some special environments, the whole shading rate of the sun visor body is only regulated, the light transmittance is required to be regulated to be the lowest, at the moment, the incident light intensity of only a part of regulating areas of the sun visor body is stronger, the visual field of a user is influenced, the incident light of other areas of the sun visor body is weaker, and the light transmittance does not need to be regulated in the areas; in view of this, the embodiment of the present invention divides the sun visor body into a plurality of adjustment regions, and the first electrode and the second electrode in the same region can be adjusted synchronously to adjust the light transmittance of the liquid crystal layer. Optionally, when the vehicle runs on a climbing slope, the external light intensity only affects the lower side area of the sun visor, the control module sequentially adjusts the voltage on the first electrode and the second electrode in each of the adjustment areas on the lower side of the sun visor body according to a preset time interval, so as to sequentially control the light transmittance of the liquid crystal layer in each of the adjustment areas of the sun visor body. Specifically, how to determine the adjustment area affected by the external light intensity can be determined by acquiring human eye images of a user when the human eye of the user turns to the sun visor body based on an eyeball tracking technology by using the image processing module, and when the human eye of the user turns to the upper side adjustment area of the sun visor body, the human eye watching state is further determined according to the human eye images acquired by the image processing module, and whether the light transmittance of the adjustment area is adjusted or not is determined according to the human eye watching state. And when the human eye watching state is a second state, the light transmittance of the adjusting area is reduced, and when the human eye watching state is a first state, the light transmittance of the adjusting area is maintained. Optionally, physical parameters of external light intensity and light rays incident to each adjusting region of the sun visor body are obtained by the photoelectric sensing module, and the physical parameters include the light intensity and the light ray incidence angle; the light intensity of the light entering the human eyes from each adjusting area is determined by combining the external light intensity, the light intensity entering the adjusting areas and the light ray incidence angle, and the control module adjusts the voltage on the first electrode and the second electrode according to the light intensity entering the human eyes and the second preset light intensity so as to control the light transmittance of the adjusting areas.
In the embodiment of the invention, optionally, when the sun visor body is opened, an image processing module installed in front of human eyes is used for acquiring images of the human eyes, the watching state of the human eyes is determined according to an eyeball tracking technology, and according to the watching state of the human eyes, the control module controls the first electrode and the second electrode to apply the same voltage to the whole liquid crystal layer so as to control the whole liquid crystal layer to have the same light transmittance. The method comprises the steps of utilizing an image processing module to watch the state of human eyes in real time, when the state of the human eyes is in a second state, sequentially adjusting the voltage on a first electrode and a second electrode in each adjusting area according to a preset period to sequentially control the light transmittance of a liquid crystal layer of each adjusting area, adjusting once the voltage on the adjusting areas, utilizing the image processing module to obtain the state of the human eyes, and stopping adjustment until the state of the human eyes is adjusted to be in the first state from the second state. When all the adjusting areas are adjusted, the obtained watching state of the human eyes is still in the second state, the opening angle of the sun shield body can be adjusted to reduce the light intensity incident to the human eyes and change the incident angle of the light rays incident to the human eyes. After the opening angle of the sun visor body is adjusted, the eye watching state is obtained by the image processing module, the method for adjusting the light transmittance of the liquid crystal layer in each adjusting area is repeated until the eye watching state is adjusted to the first state from the second state, and the adjustment is stopped. The sun shield provided by the embodiment of the invention can automatically adjust the light transmittance of the sun shield body based on the human eye image, has a better sun-shielding effect compared with the traditional sun shield, and improves the safety and convenience while reducing the influence of the outside on the visual field of a user.
The light transmittance of all or part of the adjusting area of the sun visor is adjusted in real time by utilizing the light intensity information acquired by the photoelectric sensing module and/or the eyeball exposure area acquired by the eyeball tracking technology.
While, for purposes of simplicity of explanation, the foregoing method embodiments have been described as a series of acts or combination of acts, it will be appreciated by those skilled in the art that the present invention is not limited by the illustrated ordering of acts, as some steps may occur in other orders or concurrently with other steps in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The sun visor, the control method of the sun visor and the automobile provided by the invention are described in detail, the principle and the implementation mode of the invention are explained by applying specific examples, and the description of the examples is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (9)
1. The sun visor is characterized by comprising a sun visor body, an image processing module and a control module;
the sun visor body comprises a first substrate and a second substrate which are oppositely arranged, a liquid crystal layer is arranged between the first substrate and the second substrate, a first electrode is arranged on one side of the first substrate close to the liquid crystal layer, and a second electrode is arranged on one side of the second substrate close to the liquid crystal layer; the liquid crystal layer can change the light transmittance of the sunshading board according to the electric field formed between the first electrode and the second electrode;
the image processing module is configured to acquire a human eye image and determine a human eye gazing state according to the human eye image;
the control module is coupled with the first electrode and the second electrode respectively and is configured to adjust voltages on the first electrode and the second electrode according to the human eye watching state so as to control light transmittance of the liquid crystal layer;
wherein, image processing module is configured as and acquires people's eye image according to preset cycle, and according to people's eye image acquires eyeball exposed area, according to eyeball exposed area and the relation between the preset area determine people's eye state of staring, work as when eyeball exposed area is more than or equal to when presetting the area, confirm people's eye state of staring is the first state, work as eyeball exposed area is less than during the preset area, confirm people's eye state of staring is the second state.
2. The visor of claim 1, wherein the control module is configured to adjust the voltage on the first electrode and the second electrode to control the light transmittance of the liquid crystal layer to decrease when the human eye gaze state is a second state.
3. The visor of claim 1, wherein the control module is further configured to adjust the opening angle of the visor body to adjust the eye watching state from the second state to the first state when the light transmittance of the liquid crystal layer is less than or equal to the first light transmittance and the eye watching state is the second state; the first transmittance is a maximum transmittance that affects a normal field of view.
4. The visor of claim 1 further comprising a photo-electric sensing module;
the photoelectric sensing module is configured to acquire external light intensity and physical parameters of light rays incident to the sun visor body, and the physical parameters comprise light intensity and light ray incidence angle;
the control module is further configured to open the sun visor body to a preset opening angle when the external light intensity is greater than a first preset light intensity; determining the light intensity of the light incident to human eyes according to the physical parameters of the light and the opening angle of the sun shield body; and when the light intensity incident to the human eyes is greater than a second preset light intensity, adjusting the voltages on the first electrode and the second electrode according to the relation between the light intensity incident to the human eyes and the second preset light intensity so as to control the light transmittance of the liquid crystal layer.
5. The visor of claim 4 wherein said control module is further configured to close said visor body when ambient light intensity is less than or equal to a first light intensity threshold.
6. The sun visor according to any one of claims 1-5, wherein the sun visor body is divided into a plurality of adjustment areas, and the first electrode and the second electrode in the same adjustment area are adjusted synchronously;
the control module is configured to sequentially adjust the voltage on the first electrode and the voltage on the second electrode in each of the adjustment regions at preset time intervals so as to sequentially control the light transmittance of the liquid crystal layer in each of the adjustment regions.
7. An automobile, characterized in that it comprises a sun visor according to any one of claims 1-5.
8. A sun visor control method, applied to the sun visor of any one of claims 1 to 5, comprising:
acquiring a human eye image, and determining a human eye gazing state according to the human eye image;
and adjusting the voltage on the sun shield according to the human eye watching state so as to control the light transmittance of the sun shield.
9. The method of claim 8, further comprising:
acquiring external light intensity and physical parameters of light rays incident on the sun shield, wherein the physical parameters comprise the light intensity and the light ray incidence angle;
when the external light intensity is greater than a first preset light intensity, opening the sun shield to a preset opening angle;
determining the light intensity of the incident light to human eyes according to the physical parameters of the light and the opening angle of the sun shield;
when the light intensity incident to the human eyes is larger than the second preset light intensity, the voltage on the sun shield is adjusted according to the relation between the light intensity incident to the human eyes and the second preset light intensity so as to control the light transmittance of the sun shield.
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| CN114074535B (en) * | 2020-08-20 | 2024-06-04 | 京东方科技集团股份有限公司 | Sun shield |
| CN113400905A (en) * | 2021-05-07 | 2021-09-17 | 兴科迪科技（泰州）有限公司 | Vehicle-mounted intelligent sun shield system based on visual control and sun shielding method |
| CN113400906A (en) * | 2021-05-07 | 2021-09-17 | 兴科迪科技（泰州）有限公司 | Vehicle-mounted intelligent sun shield system based on point cloud identification and sun shield method |
| CN113400904A (en) * | 2021-05-07 | 2021-09-17 | 兴科迪科技（泰州）有限公司 | Vehicle-mounted intelligent sun shield system based on eyeball capture and sun shielding method |
| CN113311629A (en) * | 2021-05-07 | 2021-08-27 | 兴科迪科技（泰州）有限公司 | Refractive index adjusting system and method for vehicle-mounted sun shield |
| CN113400907A (en) * | 2021-05-07 | 2021-09-17 | 兴科迪科技（泰州）有限公司 | Vehicle-mounted intelligent sun shield system based on gesture control and sun shielding method |
| CN113212126B (en) * | 2021-06-16 | 2022-09-30 | 深圳市小马立行科技有限公司 | Cabin self-adaptive real-time intelligent regulation and control method and system applied to automobile |
| CN113665325A (en) * | 2021-09-17 | 2021-11-19 | 光羿智能科技(苏州)有限公司 | Sun visor and control method thereof, control device and computer-readable storage medium |
| CN114834221A (en) * | 2021-12-22 | 2022-08-02 | 中国第一汽车股份有限公司 | Intelligent sun shading method, system, terminal and storage medium for automobile sun visor |
| CN119550787A (en) * | 2023-09-04 | 2025-03-04 | 中兴通讯股份有限公司 | Sun visor control method, control device, sun visor and storage medium |
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| CN101292876A (en) * | 2007-04-28 | 2008-10-29 | 姚士康 | Monitoring and protecting instrument for drive fatigue |
| JP5007818B2 (en) * | 2007-09-26 | 2012-08-22 | 株式会社エクォス・リサーチ | Anti-glare device for vehicles |
| JP2010179817A (en) * | 2009-02-06 | 2010-08-19 | Panasonic Corp | Anti-dazzling device for vehicle |
| CN205706097U (en) * | 2016-05-04 | 2016-11-23 | 科世达（上海）管理有限公司 | A kind of automotive sunshade panel adjusting means and automobile |
| CN106004366B (en) * | 2016-07-11 | 2019-07-02 | 京东方科技集团股份有限公司 | A kind of shade and the automobile with it |
| CN108162729B (en) * | 2017-12-14 | 2020-05-05 | 昆山龙腾光电股份有限公司 | Automobile anti-glare system and method |
| CN109145852B (en) * | 2018-08-31 | 2022-06-17 | 辽宁工业大学 | Driver fatigue state identification method based on eye opening and closing state |
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