Liquid lens, image acquisition module, near-to-eye display device and protection method

Abstract

The invention provides a liquid lens, an image acquisition module, a near-to-eye display device and a protection method, the liquid lens is arranged on a light path of an image acquisition unit, and the liquid lens comprises a container and liquid; the inner cavity of the container comprises a first area and a second area communicated with the first area; the liquid is filled in the inner cavity of the container and can flow in the first area and the second area; when a driving voltage is applied to the liquid lens, the liquid converges between the first area and the second area to form a condensing lens, so that an incident beam incident to the image acquisition unit is converged to the image acquisition unit. And when the driving voltage is not applied to the liquid lens, the liquid is deposited to the second area to form a scattering lens so as to scatter an incident light beam incident to the image acquisition unit. The liquid lens provided by the invention can protect the image acquisition unit, and avoids the influence on the image acquisition quality of the image acquisition unit.

Description

Technical Field

[0001] The present application relates to the technical field of optical devices, and in particular to a liquid lens, an image acquisition module, a near-eye display device, and a protection method. Background Art

[0002] At present, the usage scenarios of image acquisition modules are diverse, but in some usage scenarios there may be strong light sources. When the strong light emitted by these strong light sources shines on the image acquisition module, it is easy to damage the image acquisition module, causing problems such as bad pixels, bad lines and flowery screens in the image acquisition module. In order to protect the image acquisition module, most protection solutions adopt the method of adding optical elements such as polarizing films to the image acquisition module, but setting up polarizing films will reduce the amount of light entering, thereby affecting the image acquisition quality. Summary of the invention

[0003] The present application provides a liquid lens, an image acquisition module, a near-eye display device and a protection method, aiming to protect an image acquisition unit and avoid affecting the image acquisition quality of the image acquisition unit.

[0004] In a first aspect, the present application provides a liquid lens, wherein the liquid lens is arranged on an optical path of an image acquisition unit, and the liquid lens comprises:

[0005] A container, wherein the inner cavity of the container includes a first area and a second area communicating with the first area;

[0006] a liquid, the liquid being filled in the inner cavity of the container and being able to flow between the first region and the second region;

[0007] When a driving voltage is applied to the liquid lens, the liquid converges between the first area and the second area to form a focusing lens to converge the incident light beam incident to the image acquisition unit to the image acquisition unit; when no driving voltage is applied to the liquid lens, the liquid is deposited to the second area to form a scattering lens to scatter the incident light incident to the image acquisition unit.

[0008] In a second aspect, the present application further provides an image acquisition module, which includes an image acquisition unit and a liquid lens as provided in the first aspect, wherein the liquid lens is arranged on an optical path of the image acquisition unit.

[0009] In a third aspect, the present application also provides a near-eye display device, which comprises at least the image acquisition module provided in the second aspect.

[0010] In a fourth aspect, the present application further provides a protection method, which is applied to the image acquisition module provided in the second aspect, and the protection method includes:

[0011] receiving a protection start instruction, wherein the protection start instruction is used to trigger protection of an image acquisition unit in the image acquisition module;

[0012] In response to the protection start instruction, application of the driving voltage to the liquid lens is stopped.

[0013] The present application provides a liquid lens, an image acquisition device, a near-eye display device and a protection method. The liquid lens provided by the present application is arranged on the optical path of an image acquisition unit. The liquid lens includes a container and a liquid filled in an inner cavity of the container, and the inner cavity of the container includes a first area and a second area connected to the first area, so that the liquid can flow in the first area and the second area; wherein, when a driving voltage is applied to the liquid lens, the liquid can converge between the first area and the second area to form a focusing lens, so that the image acquisition unit can normally acquire an image through the liquid lens forming the focusing lens; and when no voltage is applied to the liquid lens, the liquid is deposited to the second area to form a scattering lens, and the scattering lens can scatter an incident light beam incident to the image acquisition unit, thereby achieving the effect of reducing the light intensity of the incident light beam and preventing the incident light beam from directly hitting the image acquisition unit, so as to protect the image acquisition unit. The liquid lens provided in the present application can form a scattering lens when no voltage is applied, so as to protect the image acquisition unit; and when the image acquisition unit does not need to be protected, the liquid lens can form a normal lens, avoiding the problem that part of the light beam cannot penetrate the polarizer due to the selective effect of light, thereby avoiding the reduction of the amount of light entering, and then ensuring the image acquisition quality of the protected image acquisition unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 A liquid lens provided in one embodiment of the present application;

[0016] Figure 2a A schematic diagram of a liquid lens provided in an embodiment of the present application when a driving voltage is applied;

[0017] Figure 2b A schematic diagram of a liquid lens provided in an embodiment of the present application when no driving voltage is applied;

[0018] Figure 3 A schematic diagram of an image acquisition module provided in one embodiment of the present application;

[0019] Figure 4A schematic diagram of a near-eye display device provided by an embodiment of the present application;

[0020] Figure 5 A flowchart of the steps of a protection method provided in one embodiment of the present application.

[0021] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0023] The flowcharts shown in the accompanying drawings are only examples and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may also be decomposed, combined or partially merged, so the actual execution order may change according to actual conditions.

[0024] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0025] Please refer to Figure 1 , Figure 1 A liquid lens 110 is provided in accordance with an embodiment of the present application.

[0026] The liquid lens 110 is disposed on the optical path of the image acquisition unit, and the image acquisition unit is used to obtain light incident from the external environment to the image acquisition unit through the liquid lens 110 to achieve image acquisition; wherein the image acquisition unit includes but is not limited to a camera.

[0027] The liquid lens 110 includes a container 111 and a liquid 112 ; the inner cavity of the container 111 includes a first region 21 and a second region 22 connected to the first region 21 ; the liquid 112 is filled in the inner cavity of the container 111 and can flow in the first region 21 and the second region 22 .

[0028] When a driving voltage is applied to the liquid lens 110, the liquid 112 converges between the first area 21 and the second area 22 to form a condenser lens, so as to converge the incident light beam incident to the image acquisition unit to the image acquisition unit, so as to facilitate the image acquisition unit to perform image acquisition; and when no driving voltage is applied to the liquid lens 110, such as Figure 1As shown, the liquid 112 is deposited on the second area 22 to form a scattering lens to scatter the incident light beam incident to the image acquisition unit.

[0029] In a specific implementation process, an electrode is provided in the liquid lens 110, so that the liquid 112 in the liquid lens 110 can be gathered between the first area 21 and the second area 22 or deposited in the second area 22 according to whether a driving voltage is applied to the liquid lens 110. Specifically, the electrode includes at least two strip electrodes, which are respectively arranged in the first electrode receiving part and the second electrode receiving part of the container 111, the first electrode receiving part and the second electrode receiving part are arranged oppositely, the inner cavity of the container 111 is arranged between the first electrode receiving part and the second electrode receiving part, and the first electrode receiving part is adjacent to the first area 21 in the inner cavity, and the second electrode receiving part is adjacent to the second area 22 in the inner cavity; when a driving voltage is applied to the electrodes in the liquid lens 110, the liquid 112 in the inner cavity of the container 111 can be gathered in the first area 21 and the second area 22 according to the applied driving voltage.

[0030] It should be noted that in the related art, the lens set in front of the image acquisition unit generally has a focusing effect, so that the incident light beam can be converged into the image acquisition unit, so that the image acquisition unit can obtain the light beam to realize image acquisition. In a strong light environment, the lens will also converge strong light, which is easy to damage the image acquisition unit. Based on this, the related art proposes some image acquisition unit protection schemes. In the scheme, by adding a polarizer, the selective transmittance of the polarizer to light is used to reduce the light intensity of the incident light beam, thereby protecting the image acquisition unit; but due to the selective transmittance of the polarizer to light, the light of the incident light beam received by the image acquisition unit is incomplete, so the setting of the polarizer will reduce the amount of light entering the image acquisition unit, affecting the image acquisition quality.

[0031] The liquid lens 110 provided in this embodiment can be in a state of applying a driving voltage when there is no need to protect the image acquisition unit, so that the liquid 112 in the inner cavity of the container 111 converges between the first area 21 and the second area 22 to form a focusing lens, thereby achieving the focusing effect when the image acquisition unit performs normal image acquisition. When the image acquisition unit needs to be protected, the liquid lens 110 is in a state where no driving voltage is applied, so that the liquid 112 in the inner cavity of the container 111 is deposited on the second area 22 to form a scattering lens. Since the incident light beam needs to pass through the liquid lens 110 when it is incident on the image acquisition unit, the liquid lens 110 can scatter the incident light beam through the liquid 112 deposited in the second area 22. Therefore, when image acquisition is not required or strong light is required to protect the image unit, the liquid lens 110 not only avoids converging the light beam, but also scatters the incident light beam to avoid the incident light beam directly hitting the image acquisition unit, thereby protecting the image acquisition unit in a strong light environment; that is, the liquid lens 110 provided in this embodiment can form a focusing lens when the image acquisition unit needs to perform image acquisition, so that when external light is incident, there will be no refraction or scattering outside the design or the light cannot be transmitted, thereby ensuring the image acquisition effect; and when the image acquisition unit needs to be protected, the deposited liquid 112 in the liquid lens 110 can scatter the incident light beam to achieve the effect of weakening the incident light beam to protect the image acquisition unit.

[0032] It should be understood that the shape and size of the container 111 in the liquid lens 110, as well as the amount of liquid 112 filled therein, can be set according to the optical parameters and / or image acquisition requirements of the corresponding image acquisition unit, and this application does not impose any restrictions thereto.

[0033] In some embodiments, the container 111 includes a first side wall, the first side wall is made of a flexible material, and the liquid 112 is deposited toward the second area 22 and changes the shape of the first side wall, thereby forming a scattering lens.

[0034] Exemplarily, if the first side wall is made of flexible material, when the liquid lens 110 is not subjected to a driving voltage so that the liquid 112 is deposited in the second area 22, the deposited liquid 112 will cause the flexible material to deform, thereby changing the shape of the first side wall, so that more liquid 112 can be deposited in the second area 22 or concentrated in one place in the second area 22, and the liquid 112 can also form a non-planar surface, so that the liquid 112 can better reflect and refract the incident light, thereby making it more difficult for the incident light beam to penetrate the liquid 112, thereby achieving a better protection effect on the image acquisition unit.

[0035] See also Figure 2a and Figure 2b , Figure 2aThis is a schematic diagram of a liquid lens 110 provided in an embodiment of the present application when a driving voltage is applied. Figure 2b This is a schematic diagram of the liquid lens 110 provided in an embodiment of the present application when no driving voltage is applied.

[0036] In some embodiments, the first sidewall is formed of a thin film 113 .

[0037] Exemplarily, the film 113 is used as the manufacturing material of the first side wall, so that the film 113 can be deformed when the liquid 112 is deposited in the second area 22 , thereby allowing more liquid 112 to be deposited in the second area 22 .

[0038] In the specific implementation process, Figure 2a As shown in FIG. 1 , when a driving voltage is applied to the liquid lens 110, the liquid 112 converges in the first region 21 and the second region 22 to form a focusing lens; when a driving voltage is not applied to the liquid lens 110, as shown in FIG. Figure 2b As shown, the liquid 112 flows from the first area 21 to the second area 22 under the action of gravity and is deposited in the second area 22 , causing the film 113 to deform.

[0039] In some embodiments, the first side wall is a side wall facing away from the image acquisition unit.

[0040] Exemplarily, since the liquid lens 110 and the image acquisition unit are arranged at a relatively close distance, the side wall facing away from the image acquisition unit can be deformed, thereby preventing the liquid lens 110 from squeezing the image acquisition unit when deformed.

[0041] In some embodiments, the container 111 further includes a second side wall, which is disposed opposite to the first side wall and is made of a hard material.

[0042] Exemplarily, using a hard material to prepare the second side wall opposite to the first side wall in the container 111 can prevent the liquid lens 110 from being squeezed onto the image acquisition unit due to the deposition of the liquid 112 when no voltage is applied, and can also extend the service life of the liquid lens 110.

[0043] In some embodiments, the liquid 112 includes liquid crystal; or the liquid 112 includes a mixture of silicone oil and water.

[0044] In the specific implementation process, the liquid 112 filled in the inner cavity of the container 111 includes but is not limited to liquid crystal and mixed liquid 112, wherein the mixed liquid 112 can be a mixture of water and silicone oil in a certain proportion, and the present application does not limit the specific components of the mixture.

[0045] See also Figure 3 , Figure 3A schematic diagram of an image acquisition module 100 provided in accordance with an embodiment of the present application.

[0046] As shown in the figure, the present application also provides an image acquisition module 100, wherein the image acquisition module 100 includes an image acquisition unit 120 and a liquid lens 110 as provided in any of the above embodiments, and the liquid lens 110 is arranged on the optical path of the image acquisition unit 120, so that when the image acquisition unit 120 needs to perform image acquisition, the liquid 112 in the liquid lens 110 is converged in the first area 21 and the second area 22 in the inner cavity of the container 111 of the liquid lens 110 under the action of the driving voltage to form a focusing lens, and the light from the external environment can pass through the focusing lens into the image acquisition unit 120 to be acquired by the image acquisition unit 120 to complete the image acquisition; and when strong light appears and the image acquisition unit 120 needs to be protected, the liquid 112 in the liquid lens 110 can be deposited in the second area 22 under the action of gravity, and the liquid 112 deposited in the second area 22 can scatter the incident light beam to achieve the effect of protecting the image acquisition unit 120.

[0047] See also Figure 4 , Figure 4 A schematic diagram of a near-eye display device provided in one embodiment of the present application.

[0048] The present application also provides a near-eye display device, which includes at least the image acquisition module 100 provided above.

[0049] In a specific implementation process, the image acquisition module 100 provided on the near-eye display device can acquire images of the environment, and display the images to the user wearing the near-eye display device after image processing by the near-eye display device, thereby realizing near-eye display. It should be understood that the near-eye display device includes but is not limited to AR near-eye display devices, VR near-eye display devices, and XR near-eye display devices.

[0050] In some embodiments, the near-eye display device includes a display unit, and the angle between the plane where the display unit is located and the optical path of the image acquisition unit 120 is greater than or equal to a preset angle.

[0051] Exemplarily, when the image display module is arranged in a near-eye display device, there is a certain inclination angle with the horizontal plane, so that there is also a certain angle between the display unit perpendicular to the horizontal plane and the optical path of the image acquisition unit 120; specifically, the preset angle is greater than 0, and this application does not limit the specific value of the preset angle.

[0052] It should be understood that when the image acquisition module 100 is set at a certain tilt angle in the near-eye display device, it can avoid damage to the image acquisition unit 120 caused by direct exposure to strong light such as laser; specifically, the user's line of sight is perpendicular to the plane where the display unit is located. When the strong light is irradiated to the user's line of sight, due to the tilt angle of the image acquisition module 100, when the near-eye display device is exposed to the strong light, the strong light will not directly enter the image acquisition module 100, and the liquid 112 deposited in the liquid lens 110 can further scatter the incident light beam, thereby achieving the effect of weakening the incident light beam to protect the image acquisition unit 120.

[0053] In a specific implementation process, the near-eye display device includes AR glasses. Taking the image acquisition module 100 with a certain tilt angle set on the front frame of the AR glasses as an example, when the AR glasses are worn by the user but not turned on, the liquid 112 of the liquid lens 110 in the image acquisition module 100 is deposited in the second area 22 in the container 111 of the liquid lens 110 under the action of gravity, and forms a non-plane, so that when the incident light beam is incident, it can reflect and refract the incident light beam to achieve scattering of the incident light beam, avoid the incident light beam directly hitting the image acquisition unit 120, and thus achieve protection of the image acquisition unit 120; and when the user turns on the AR glasses, the liquid 112 of the liquid lens 110 in the image acquisition module 100 is deposited in the second area 22 in the container 111 of the liquid lens 110 under the action of gravity, and forms a non-plane, so that when the incident light beam is incident, it can reflect and refract the incident light beam to achieve scattering of the incident light beam, avoid the incident light beam directly hitting the image acquisition unit 120, and thus achieve protection of the image acquisition unit 120; When the AR glasses are worn and the image acquisition module 100 is turned on, the power supply in the AR glasses can provide a driving voltage to the liquid lens 110, so that the liquid lens 110 forms a focusing lens, and then adapts to the image acquisition unit 120, provides a normal working environment for the image acquisition unit 120, and ensures the amount of light entering the image acquisition unit 120. If strong light is irradiated to the image acquisition module 100 at this time, the AR glasses can automatically or under the control of the user stop providing a driving voltage to the liquid lens 110 in time, so that the liquid 112 in the liquid lens 110 loses the electric field and settles under the action of gravity, thereby protecting the image acquisition unit 120.

[0054] It should be noted that the above-mentioned embodiments can also be applied to devices such as AR helmets and XR glasses, and the present application does not limit the specific form of the near-eye display device.

[0055] See also Figure 5 , Figure 5 A flowchart of the steps of a protection method provided in one embodiment of the present application.

[0056] As shown in the figure, the present application also provides a protection method, which includes steps S101 to S102.

[0057] Step S101: receiving a protection start instruction, wherein the protection start instruction is used to trigger protection of an image acquisition unit in the image acquisition module.

[0058] Exemplarily, when a protection instruction is received, a protection action for the image acquisition unit is triggered. In a specific implementation, the protection start instruction can be generated based on the parameter information of the detected incident light beam, or can be generated based on the user's operation, which is not limited in this application.

[0059] Step S102: In response to the protection start instruction, stop applying the driving voltage to the liquid lens.

[0060] Exemplarily, in response to a protection start instruction, the driving voltage is stopped from being applied to the liquid lens, so that the liquid in the liquid lens is deposited in the second area of ​​the container to scatter the incident light beam, thereby achieving the purpose of protecting the image acquisition unit.

[0061] In some embodiments, the image acquisition module is communicatively connected to the display module, and the method further includes: in response to the protection start instruction, sending a display instruction to the display module, so that the display module displays target display information in response to the display instruction, and the target display information is used to prompt the user to leave the current location.

[0062] Exemplarily, the image acquisition module is communicatively connected to the display module so that the display module can also respond to the protection start instruction, generate target display information for prompting the user to leave the current location, and display it to the user, thereby reminding the user that there is a risk of damage to the image acquisition unit at the current location, allowing the user to turn off the device equipped with the image acquisition module or take measures such as shielding to achieve the purpose of protecting the image acquisition unit.

[0063] In some embodiments, before receiving the protection start instruction, the method also includes: detecting parameter information of the incident light beam incident to the image acquisition unit; determining whether the image acquisition module meets the protection start condition based on the parameter information; if the image acquisition module meets the protection start condition, generating the protection start instruction.

[0064] Exemplarily, before receiving the protection start instruction, the parameter information of the incident light beam is detected to determine whether the image acquisition module meets the protection start conditions through the parameter information of the incident light beam. If yes, a protection instruction is generated to trigger the protection mechanism.

[0065] In the specific implementation process, the incident light beam is received by the image acquisition module to determine the parameter information of the incident light beam, so there is no need to set up multiple image acquisition units, which saves costs and is conducive to the lightweight and miniaturization of the module. It should be noted that after the image acquisition module receives the incident light beam, it is necessary to determine the parameter information in a relatively short time to determine whether the protection start condition is met, so as to avoid the long-term exposure of the incident light beam to damage the image acquisition module.

[0066] In some embodiments, the parameter information includes light intensity and wavelength; determining whether the image acquisition module meets the protection startup conditions based on the parameter information includes: if the light intensity of the incident light beam is greater than or equal to a preset light intensity threshold, and the wavelength of the incident light beam is less than or equal to a preset wavelength threshold, then determining that the image acquisition module meets the protection startup conditions.

[0067] In the specific implementation process, whether the image acquisition module meets the protection activation conditions is determined by the light intensity and wavelength of the incident light beam. It should be understood that when the light intensity of the incident light beam is greater than or equal to the preset light intensity threshold and the wavelength of the incident light beam is less than or equal to the preset wavelength threshold, it is determined that the incident light beam is likely to cause damage to the image acquisition unit, and thus it is necessary to activate the protection of the image acquisition module to prevent the incident light beam from directly damaging the image acquisition unit in the image acquisition module.

[0068] In other embodiments, if the light intensity of the incident light beam is less than the light intensity threshold, or the wavelength of the incident light beam is greater than the wavelength threshold, it is determined that the image acquisition module does not meet the protection start condition.

[0069] During the specific implementation process, if the light intensity of the incident light beam is less than the light intensity threshold or the corresponding wavelength of the incident light beam is greater than the wavelength threshold, it is determined that the incident light beam will basically not damage the image acquisition module, and it is determined that the image acquisition module does not meet the protection start conditions when the incident light beam is incident, thereby maintaining the normal working state of the image acquisition module.

[0070] In some embodiments, the method further includes: if the image acquisition module does not meet the protection start-up condition, applying the driving voltage to the liquid lens so that the liquid lens forms a focusing lens to converge the incident light beam incident to the image acquisition unit to the image acquisition unit.

[0071] Exemplarily, after determining that the image acquisition module does not meet the protection start conditions, if it is necessary to continue the image acquisition processing, the driving voltage continues to be applied to the liquid lens so that the liquid lens forms a focusing lens to meet the light collection requirements of the image acquisition unit. In the process of realizing the protection of the image acquisition unit, the problem of less light entering the image acquisition unit under normal circumstances due to the need to set a polarizing plate is avoided.

[0072] In some embodiments, the image acquisition module is calibrated using a preset light source; a light intensity calibration value and a wavelength calibration value are determined based on the calibration result; a first preset coefficient and a second preset coefficient are obtained; the light intensity calibration value is adjusted according to the first preset coefficient to obtain the light intensity threshold, and the light intensity threshold is less than the light intensity calibration value; the wavelength calibration value is adjusted according to the second preset coefficient to obtain the wavelength threshold, and the wavelength threshold is greater than the wavelength calibration value.

[0073] Exemplarily, the above light intensity threshold and wavelength threshold can be determined by pre-calibration. In the specific implementation process, the image acquisition module is calibrated using a preset light source, wherein the preset light source includes but is not limited to light sources such as laser pens and / or spotlights; calibration is achieved by using preset light sources such as laser pens and spotlights of various models to determine the appropriate light intensity threshold and wavelength threshold to protect the image acquisition unit.

[0074] In the specific implementation process, the spectrum of the preset light source is obtained to determine the parameters such as the light intensity peak value, wavelength range and the like of the preset light source in the spectrum of the preset light source, thereby determining the corresponding light intensity calibration value and wavelength calibration value according to the light intensity peak value and the wavelength range to complete the calibration process; it should be noted that if the calibration process is performed using multiple preset light sources, the light intensity calibration values ​​corresponding to the multiple preset light sources and the wavelength calibration values ​​corresponding to the multiple preset light sources can be normalized to obtain unique light intensity calibration values ​​and wavelength calibration values, thereby completing the calibration process.

[0075] After completing the calibration through the preset light source and obtaining the light intensity calibration value and the wavelength calibration value, it should be understood that these two calibration values ​​can be critical values, that is, a light source with a light intensity greater than or equal to the light intensity calibration value and a wavelength less than or equal to the wavelength calibration value can be determined as a light source that will cause damage to the image acquisition module; the light intensity calibration value is adjusted by the first preset coefficient to obtain a light intensity threshold value less than the light intensity calibration value, and the wavelength calibration value is adjusted by the second preset coefficient to obtain a wavelength threshold value greater than the wavelength calibration value, thereby realizing the setting of the calibration value margin; thereby avoiding the situation where the image acquisition module is damaged by the incident light beam in a very short time, thereby improving the protection effect of the image acquisition module.

[0076] For example, the first preset coefficient is 0.85, the second preset coefficient is 1.2, the light intensity threshold is determined by multiplying the first preset coefficient by the light intensity calibration value, and the wavelength threshold is determined by multiplying the second preset coefficient by the wavelength calibration value.

[0077] It should be understood that the terms used in this application specification are only for the purpose of describing specific embodiments and are not intended to limit the application. As used in this application specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0078] It should also be understood that the term "and / or" used in the specification of this application and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, including these combinations. It should be noted that, in this article, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "including a..." does not exclude the presence of other identical elements in the process, method, article or system including the element.

[0079] The serial numbers of the embodiments of the present application are for description only and do not represent the advantages and disadvantages of the embodiments. The above description is only a specific implementation mode of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A liquid lens, characterized in that: The liquid lens is arranged on the optical path of the image acquisition unit, and the liquid lens comprises: A container, wherein the inner cavity of the container includes a first area and a second area communicating with the first area; a liquid, the liquid being filled in the inner cavity of the container and being able to flow between the first region and the second region; When a driving voltage is applied to the liquid lens, the liquid converges between the first area and the second area to form a focusing lens to converge the incident light beam incident to the image acquisition unit to the image acquisition unit; when no driving voltage is applied to the liquid lens, the liquid is deposited to the second area to form a scattering lens to scatter the incident light beam incident to the image acquisition unit.

2. The liquid lens according to claim 1, wherein: The container comprises a first side wall, the first side wall is made of a flexible material, the liquid is deposited toward the second area and changes the shape of the first side wall, thereby forming a scattering lens.

3. The liquid lens according to claim 2, characterized in that: The first side wall is a side wall facing away from the image acquisition unit.

4. The liquid lens according to claim 2, wherein: The container further comprises a second side wall, which is arranged opposite to the first side wall and is made of a hard material.

5. The liquid lens according to claim 2, wherein: The first side wall is made of a film.

6. The liquid lens according to any one of claims 1 to 5, characterized in that: The liquid includes liquid crystal; or, the liquid includes a mixture of silicone oil and water.

7. An image acquisition module, characterized in that: The image acquisition module comprises an image acquisition unit and a liquid lens as described in any one of claims 1 to 6, and the liquid lens is arranged on the optical path of the image acquisition unit.

8. A near-eye display device, characterized in that: The near-eye display device includes at least the image acquisition module as described in claim 7.

9. The near-eye display device according to claim 8, characterized in that: The near-eye display device also includes a display unit, and an angle between a plane where the display unit is located and an optical path of the image acquisition unit is greater than or equal to a preset angle.

10. A protection method, characterized in that: Applied to the image acquisition module as claimed in claim 7, the protection method comprises: receiving a protection start instruction, wherein the protection start instruction is used to trigger protection of an image acquisition unit in the image acquisition module; In response to the protection start instruction, application of the driving voltage to the liquid lens is stopped.

11. The protection method according to claim 10, characterized in that: Before receiving the protection start instruction, the method further includes: detecting parameter information of an incident light beam incident to the image acquisition unit; Determining whether the image acquisition module meets the protection start condition according to the parameter information; If the image acquisition module meets the protection start condition, the protection start instruction is generated.

12. The protection method according to claim 11, characterized in that: The parameter information includes light intensity and wavelength; and determining whether the image acquisition module meets the protection start condition according to the parameter information includes: If the light intensity of the incident light beam is greater than or equal to a preset light intensity threshold, and the wavelength of the incident light beam is less than or equal to a preset wavelength threshold, it is determined that the image acquisition module meets the protection start condition; If the light intensity of the incident light beam is less than the light intensity threshold, or the wavelength of the incident light beam is greater than the wavelength threshold, it is determined that the image acquisition module does not meet the protection start condition.

13. The protection method according to claim 12, characterized in that: The method further comprises: Calibrate the image acquisition module using a preset light source; Determining a light intensity calibration value and a wavelength calibration value according to the calibration processing result; Obtain a first preset coefficient and a second preset coefficient; The light intensity calibration value is adjusted according to a first preset coefficient to obtain the light intensity threshold, wherein the light intensity threshold is less than the light intensity calibration value; The wavelength calibration value is adjusted according to a second preset coefficient to obtain the wavelength threshold, and the wavelength threshold is greater than the wavelength calibration value.

14. The protection method according to any one of claims 10 to 13, characterized in that: The image acquisition module is communicatively connected with the display module, and the method further includes: In response to the protection start instruction, a display instruction is sent to the display module, so that the display module displays target display information in response to the display instruction, and the target display information is used to prompt the user to leave the current position.

15. The protection method according to claim 11, characterized in that: The method further comprises: If the image acquisition module does not meet the protection start condition, the driving voltage is applied to the liquid lens so that the liquid lens forms a focusing lens to converge the incident light beam incident to the image acquisition unit to the image acquisition unit.

Images