Camera rapid zooming driving method based on liquid lens and sealing leakage-proof structure

Abstract

The invention relates to the technical field of cameras, and discloses a liquid lens-based camera rapid zoom driving method and a sealing leakage-proof structure, and the method comprises the following steps: step 1, initialization setting, step 2, zoom signal acquisition and analysis, step 3, driving adjustment, and step 4, zoom verification and feedback. The lens further comprises a liquid lens body, a driving assembly, a sealing assembly and a shell. According to the invention, the initial parameter is determined through initialization setting, the zooming signal is effectively analyzed, and the driving adjustment amount is calculated in combination with the response characteristic parameter of the liquid lens, so that rapid and accurate zooming is realized, the zooming speed is increased by several times or even dozens of times compared with the traditional mechanical zooming mode, the application scene with the requirement for rapid zooming is satisfied, and the application prospect is wide. In addition, a zoom verification and feedback step is also set, and the zoom precision is ensured through real-time detection and fine adjustment, so that the camera can accurately reach the target focal length.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of cameras, in particular to a camera fast zoom driving method based on a liquid lens and a sealing leakage-proof structure. BACKGROUND

[0002] With the development of science and technology, cameras are increasingly widely applied in various fields, such as security monitoring, smart phones, automatic driving and the like. The zoom function is one of the important functions of a camera, and traditional camera zooming is usually achieved by driving a lens to move through a mechanical structure. However, this method has the problems of slow zooming speed, complex structure and large size.

[0003] As a new type of optical element, the liquid lens has the advantages of no mechanical moving parts, fast response speed and small size, and the realization of camera zooming based on the liquid lens has become a research hotspot. However, the camera zooming driving method based on the liquid lens still needs to be improved in terms of zooming speed and precision, and meanwhile, the liquid lens is prone to liquid leakage during use, which affects the normal work and service life of the camera. SUMMARY

[0004] The application aims to provide a camera fast zoom driving method based on a liquid lens and a sealing leakage-proof structure, so as to realize fast and accurate zooming of the camera and effectively prevent liquid leakage of the liquid lens.

[0005] To solve the above technical problems, the application is implemented through the following technical scheme:

[0006] The application is a camera fast zoom driving method based on a liquid lens and a sealing leakage-proof structure.

[0007] In a first aspect, the application provides a technical scheme, that is, a camera fast zoom driving method based on a liquid lens, which comprises the following steps:

[0008] Step 1: initialization setting, the initial curvature, initial voltage of the liquid lens and the initial focal length of the camera are set, and the related initial parameters are stored in the control module.

[0009] Step 2: zoom signal acquisition and analysis, the control module receives the zoom instruction signal input from outside, analyzes the signal, and obtains the target focal length parameter.

[0010] Step 3: driving adjustment, the control module calculates the required driving adjustment amount according to the target focal length parameter and the initial parameter, and applies a corresponding voltage or pressure to the liquid lens through the driving module, so that the curvature of the liquid lens changes, thereby realizing the adjustment of the focal length.

[0011] Step four: zoom verification and feedback, the actual focal length of the camera is detected in real time by the detection module, the actual focal length is compared with the target focal length, if the two are consistent, the zoom is completed; if they are not consistent, the control module controls the driving module to fine-tune again according to the deviation value until the actual focal length and the target focal length are consistent.

[0012] By adopting the technical scheme, the zoom of the liquid lens camera is quickly and accurately realized through the complete initialization, signal analysis, driving adjustment and feedback process, and the real-time zoom requirement is met.

[0013] Further, the setting of the initial curvature in step one is realized by adjusting the initial proportion and distribution state of the two mutually insoluble liquids in the liquid lens, and the initial voltage is set as the minimum voltage value to make the liquid lens in a stable initial state.

[0014] By adopting the technical scheme, the setting basis of the initial curvature and voltage is determined, the initial state of the liquid lens is ensured to be stable, a reliable reference is provided for subsequent zoom adjustment, and the initial deviation is reduced.

[0015] Further, the zoom instruction signal inputted externally in step two can be a signal inputted through the physical button of the camera, transmitted wirelessly or connected with other devices, and the validity of the signal is also judged in the analysis process, if the signal is invalid, the subsequent operation is not performed and a prompt is issued.

[0016] By adopting the technical scheme, the acquisition and validity judgment method of the zoom signal are standardized, the misoperation caused by invalid signals is avoided, and the anti-interference ability and stability of the driving method are improved.

[0017] Further, the driving module in step three adopts a high-precision voltage driving circuit, which can quickly respond to the instructions of the control module, and when calculating the driving adjustment amount, the response characteristic parameters of the liquid lens, including the dielectric constant and viscosity of the liquid lens, are also combined to realize fast and accurate adjustment.

[0018] By adopting the technical scheme, the adjustment amount is calculated in combination with the response characteristic parameters of the liquid lens, and the high-precision driving circuit is matched, so that the speed and accuracy of the zoom adjustment are further improved.

[0019] Further, the detection module in step four adopts a focal length sensor to detect the actual focal length in real time, and when comparing, an allowed deviation range is set, when the actual focal length is within the allowed deviation range of the target focal length, it is determined that the two are consistent.

[0020] By adopting the technical scheme, the actual focal length is detected in real time by the focal length sensor and the deviation range is determined, so that the zoom result meets the actual use accuracy requirement and over-adjustment is avoided.

[0021] In the first aspect, the application further provides a technical solution, based on the liquid lens camera sealing leak-proof structure, comprising a liquid lens body, a driving assembly, a sealing assembly and a shell, the liquid lens body is arranged inside the shell, the driving assembly and the liquid lens body are movably connected, and the driving assembly is used for driving the liquid lens body to adjust the zoom, and the sealing assembly is arranged at the connecting part between the liquid lens body and the shell and the connecting part between the driving assembly and the liquid lens body.

[0022] The technical solution is used, the sealing is arranged at the key connecting parts of the liquid lens, the shell and the driving assembly, the leakage path is blocked from the source of structural design, and the long-term stable operation of the camera is ensured.

[0023] Further, the sealing assembly comprises a first sealing ring and a second sealing ring, the first sealing ring is arranged between the edge of the liquid lens body and the inner wall of the shell, the second sealing ring is arranged at the connecting end between the driving assembly and the liquid lens body, and the first sealing ring and the second sealing ring are made of a liquid corrosion-resistant and elastic material.

[0024] The technical solution is used, the specific structure of the sealing assembly and the selection of the corrosion-resistant and elastic material are specified, the adaptability and durability of the sealing part are enhanced, and the sealing reliability is improved.

[0025] Further, the driving assembly comprises a driving rod and a driving source, one end of the driving rod is connected with the driving source, the other end of the driving rod penetrates the shell and is connected with the liquid lens body, a third sealing ring is arranged at the penetration part of the driving rod and the shell, the third sealing ring is sleeved on the driving rod and tightly fits with the inner wall of the penetration hole of the shell.

[0026] The technical solution is used, the third sealing ring is additionally arranged at the penetration part of the driving rod and the shell, the sealing weak point of the moving part is made up, and the leakage risk caused by the driving operation is reduced.

[0027] Further, the liquid lens body comprises a containing cavity, two kinds of mutually insoluble liquids are arranged inside the containing cavity, a transparent sealing cover is arranged at the opening of the containing cavity, and the edge of the transparent sealing cover and the containing cavity is sealed and connected by arranging sealing glue.

[0028] The technical solution is used, the containing cavity of the liquid lens body and the sealing cover are connected by the sealing glue, the sealing is strengthened from the liquid storage source, and the optical transmission performance is ensured.

[0029] Further, a leakage detection assembly is further included, the leakage detection assembly includes a liquid sensor and an alarm device, the liquid sensor is arranged at the bottom of the inside of the shell and near each sealing assembly, the liquid sensor and the alarm device are electrically connected, when the liquid sensor detects liquid, the alarm device sends an alarm signal.

[0030] By adopting the technical scheme, the leakage detection assembly is used to monitor leakage and send an alarm in real time, early leakage can be found and handled in time, and the risk of equipment damage caused by leakage is reduced.

[0031] The present application has the following advantages:

[0032] (1) The present application determines the initial parameters by initialization setting, effectively analyzes the zoom signal, calculates the driving adjustment amount combined with the response characteristic parameters of the liquid lens, realizes fast and accurate zoom, and the zoom speed is improved by several times or even dozens of times compared with the traditional mechanical zoom method, meets the application scenarios that have the demand for fast zoom, and the present application further sets a zoom verification and feedback step, detects and fine-tunes in real time, ensures the accuracy of zoom, and makes the camera accurately reach the target focal length.

[0033] (2) The present application sets multiple sealing assemblies, including a first sealing ring, a second sealing ring, a third sealing ring and sealing glue connection, seals from multiple possible leakage positions, effectively prevents the leakage of the liquid in the liquid lens, the sealing assembly is made of a liquid corrosion-resistant and elastic material, improves the reliability and service life of the sealing structure, can adapt to different working environments, the setting of the leakage detection assembly can detect liquid leakage in time and send an alarm signal, facilitates the user to handle in time, and reduces the loss caused by leakage.

[0034] Of course, any product implementing the present application does not necessarily need to achieve all the advantages described above. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0036] Figure 1 The flow chart of the method of the present application is shown in the figure;

[0037] Figure 2 The schematic structural diagram of the sealing leakage-proof structure of the present application is shown in the figure;

[0038] In the drawings, the components represented by each number are listed as follows:

[0039] Fig. 1, liquid lens body; 11, containing cavity; 12, transparent sealing cover; 2, drive assembly; 21, drive rod; 22, drive source; 3, sealing assembly; 31, first sealing ring; 32, second sealing ring; 33, third sealing ring; 4, shell; 5, leakage detection assembly; 51, liquid sensor; 52, alarm device. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0041] Please refer to Figure 1 and Figure 2 The present application is a liquid lens-based camera fast zoom driving method and a sealing leakage prevention structure.

[0042] In the first aspect, please refer to Figure 1 The present application provides an embodiment, a liquid lens-based camera fast zoom driving method, comprising the following steps:

[0043] Step one: initialization setting, the initial curvature, initial voltage of the liquid lens and the initial focal length of the camera are set, and the related initial parameters are stored to the control module, the setting of the initial curvature is realized by adjusting the initial proportion and distribution state of the two mutually insoluble liquids in the liquid lens, and the initial voltage is set as the minimum voltage value that makes the liquid lens in a stable initial state.

[0044] Step two: zoom signal acquisition and analysis, the control module receives the zoom instruction signal inputted externally, analyzes the signal to obtain the target focal length parameter, the zoom instruction signal inputted externally can be a signal inputted through the physical button of the camera, wirelessly communicated or connected with other devices, and the validity of the signal is also judged in the analysis process, if the signal is invalid, the subsequent operation is not performed and a prompt is given.

[0045] Step three: driving adjustment, the control module calculates the required driving adjustment amount according to the target focal length parameter and the initial parameter, and applies the corresponding voltage or pressure to the liquid lens through the driving module, so that the curvature of the liquid lens changes, thereby realizing the adjustment of the focal length, the driving module adopts a high-precision voltage driving circuit, which can quickly respond to the instructions of the control module, and when calculating the driving adjustment amount, the response characteristic parameters of the liquid lens will also be combined, including the dielectric constant and viscosity of the liquid lens, so as to realize fast and accurate adjustment.

[0046] Step four: zoom verification and feedback, the actual focal length of the camera is detected in real time by the detection module, the actual focal length is compared with the target focal length, if the two are consistent, the zoom is completed, if not, the control module controls the driving module to fine tune again according to the deviation value until the actual focal length and the target focal length are consistent, the detection module detects the actual focal length in real time by using a focal length sensor, and when the actual focal length is within the allowed deviation range of the target focal length, it is determined that the two are consistent.

[0047] In a second aspect, referring to Figure 2 The application also provides an embodiment of a liquid lens-based camera sealing and leakage prevention structure, which comprises a liquid lens body 1, a driving assembly 2, a sealing assembly 3, and a shell 4. The liquid lens body 1 is arranged inside the shell 4, the driving assembly 2 is movably connected with the liquid lens body 1, and the driving assembly 2 is used to drive the liquid lens body 1 to adjust the zoom. The sealing assembly 3 is arranged at the connection between the liquid lens body 1 and the shell 4 and at the connection between the driving assembly 2 and the liquid lens body 1. Preferably, the liquid lens body 1 is integrated inside the shell 4, the driving assembly 2 is movably connected with the liquid lens body 1 to ensure the zoom adjustment function, and the sealing assembly 3 is arranged at the key connection between the liquid lens and the shell 4 and between the driving assembly 2 and the liquid lens. This not only ensures the effectiveness of the zoom adjustment of the driving assembly 2 on the liquid lens, but also forms a basic sealing protection at the connection part with the highest risk of leakage, provides structural support for subsequent multi-layer sealing, solves the problem that the sealing and driving functions are difficult to be considered in the traditional structure, and blocks the initial leakage path while ensuring smooth zoom adjustment.

[0048] In this embodiment, the sealing assembly 3 comprises a first sealing ring 31 and a second sealing ring 32. The first sealing ring 31 is arranged between the edge of the liquid lens body 1 and the inner wall of the shell 4, and the second sealing ring 32 is arranged at the connection end between the driving assembly 2 and the liquid lens body 1. Both the first sealing ring 31 and the second sealing ring 32 are made of a liquid corrosion-resistant and elastic material. Preferably, the sealing assembly 3 uses the first sealing ring 31 and the second sealing ring 32 to correspond to the static connection part between the liquid lens and the shell 4 and the dynamic connection part between the driving assembly 2 and the liquid lens, respectively, and both are made of a liquid corrosion-resistant and elastic material. The static part is tightly attached to the contact surface to achieve stable sealing, and the dynamic part compensates for the gap caused by the movement of the connection end by the elasticity of the material. The corrosion-resistant feature avoids sealing failure caused by long-term liquid corrosion, significantly improves the sealing reliability in different connection scenarios, and prolongs the service life of the sealing assembly 3.

[0049] In the embodiment, the driving assembly 2 comprises a driving rod 21 and a driving source 22, one end of the driving rod 21 is connected with the driving source 22, the other end of the driving rod 21 is connected with the liquid lens body 1 through the shell 4, a third sealing ring 33 is arranged at the penetration of the driving rod 21 and the shell 4, the third sealing ring 33 is sleeved on the driving rod 21 and tightly adheres to the inner wall of the penetration hole of the shell 4, preferably, when the driving rod 21 of the driving assembly 2 penetrates the shell 4, the third sealing ring 33 is sleeved on the driving rod 21 and tightly adheres to the inner wall of the penetration hole of the shell 4 at the penetration, which not only does not affect the smooth expansion of the driving rod 21 due to the over-tight sealing ring, but also blocks the leakage path of the liquid from the penetration gap through the real-time adhesion of the sealing ring to the driving rod 21 and the shell 4, which makes up for the short board of the weak sealing of the moving part in the traditional driving structure, and is suitable for the use scene requiring high-frequency zoom adjustment.

[0050] In the embodiment, the liquid lens body 1 comprises a containing cavity 11, two mutually insoluble liquids are arranged inside the containing cavity 11, a transparent sealing cover 12 is arranged at the opening of the containing cavity 11, the edge of the transparent sealing cover 12 and the containing cavity 11 is sealed and connected by the sealing glue, preferably, the containing cavity 11 of the liquid lens body 1 realizes opening sealing by the transparent sealing cover 12 and the sealing glue, on the one hand, the sealing glue can fill the small gap between the containing cavity 11 and the edge of the sealing cover, form a gapless sealing to prevent internal liquid leakage, on the other hand, the transparent sealing cover 12 ensures normal light transmission, and the sealing glue has stable bonding strength after solidification, can resist the deformation of the internal liquid of the containing cavity 11 and the change of the external environmental temperature and humidity, ensures the optical performance and strengthens the basic sealing ability of the liquid lens body 1.

[0051] In the embodiment, the leakage detection assembly 5 is further included, the leakage detection assembly 5 comprises a liquid sensor 51 and an alarm device 52, the liquid sensor 51 is arranged at the bottom of the shell 4 and near each sealing assembly 3, the liquid sensor 51 and the alarm device 52 are electrically connected, when the liquid sensor 51 detects liquid, the alarm device 52 sends an alarm signal, preferably, the leakage detection assembly 5 can quickly detect liquid when the sealing assembly 3 has a trace of leakage by arranging the liquid sensor 51 at the bottom of the shell 4 and near each sealing assembly 3, and timely sends a signal through the alarm device 52, compared with the traditional manual inspection method, the early warning of leakage is realized, the maintenance can be reminded before the liquid spreads to the core components, the camera failure caused by the leakage liquid eroding the driving assembly 2, the circuit and other key structures is avoided to expand, especially suitable for the scenes such as security monitoring and vehicle-mounted which have high requirements for equipment reliability and are inconvenient for frequent shutdown inspection, and the maintenance cost and failure risk are reduced.

[0052] In use, the driving source 22 of the driving assembly 2 drives the liquid lens body 1 to adjust zoom through the driving rod 21. When the driving rod 21 penetrates the shell 4, the third sealing ring 33 expands and contracts with the driving rod 21 in real time to adhere to the surface of the driving rod 21 and the inner wall of the penetration hole of the shell 4, which does not hinder the adjustment action and blocks the leakage at the penetration position. The static connection position between the liquid lens body 1 and the shell 4 is sealed by the first sealing ring 31, and the dynamic connection end of the driving rod 21 and the liquid lens is elastically compensated by the second sealing ring 32. The two cooperate to form a basic seal. The sealing glue of the accommodating cavity 11 and the transparent sealing cover 12 prevent the internal liquid from leaking out of the opening. At the same time, the liquid sensor 51 near the bottom of the shell 4 and each sealing assembly 3 continuously monitors. If a small amount of leakage occurs, the alarm device 52 is triggered to prompt maintenance. The whole process ensures smooth zoom adjustment while realizing multi-layer leakage prevention and risk early warning.

[0053] The preferred embodiments disclosed above are only used to help explain the present application. The preferred embodiments do not describe all the details and limit the application to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of the present application. The present application is selected and described in detail in order to better explain the principles and practical applications of the present application, so that those skilled in the art can well understand and utilize the present application. The present application is limited by the claims and their full scope and equivalents.

Claims

1. A liquid lens-based camera fast zoom driving method, characterized in that: The following steps are involved: Step 1: Initialization settings: setting the initial curvature and initial voltage of the liquid lens and the initial focal length of the camera, and storing the relevant initial parameters in the control module; Step 2: zoom signal acquisition and analysis: the control module receives the external input zoom command signal, analyzes the signal, and obtains the target focal length parameter; Step 3: Drive adjustment: The control module calculates the required drive adjustment amount based on the target focal length parameters and the initial parameters. The drive module applies the corresponding voltage or pressure to the liquid lens to change the curvature of the liquid lens, thereby achieving focal length adjustment. Step 4: Zoom verification and feedback: The detection module detects the actual focal length of the camera in real time and compares the actual focal length with the target focal length. If the two are consistent, the zoom is completed. If they are inconsistent, the control module controls the drive module again according to the deviation value to make fine adjustments until the actual focal length is consistent with the target focal length.

2. The method for driving a camera with rapid zoom based on a liquid lens according to claim 1, wherein: The setting of the initial curvature in step 1 is achieved by adjusting the initial ratio and distribution state of the two immiscible liquids in the liquid lens, and the initial voltage is set to the minimum voltage value that makes the liquid lens in a stable initial state.

3. The method for driving a camera with rapid zoom based on a liquid lens according to claim 1, wherein: The external input zoom command signal described in step 2 can be a signal input through the physical button of the camera, wireless communication transmission, or transmission through connection with other devices. The validity of the signal will also be judged during the analysis process. If the signal is invalid, no subsequent operation will be performed and a prompt will be issued.

4. The method for driving a camera with rapid zoom based on a liquid lens according to claim 1, wherein: The driving module described in step three uses a high-precision voltage driving circuit, which can quickly respond to the instructions of the control module. When calculating the driving adjustment amount, the response characteristic parameters of the liquid lens are also combined, including the dielectric constant and viscosity of the liquid lens, to achieve fast and accurate adjustment.

5. The method for driving a camera with rapid zoom based on a liquid lens according to claim 1, wherein: The detection module in step 4 uses a focal length sensor to detect the actual focal length in real time. An allowable deviation range is set for comparison. When the actual focal length is within the allowable deviation range of the target focal length, the two are determined to be consistent.

6. A liquid lens-based camera sealing and leak-proof structure, which is applied to the liquid lens-based camera fast zoom driving method according to claims 1-5, characterized in that: The invention comprises a liquid lens body (1), a driving component (2), a sealing component (3) and a housing (4); the liquid lens body (1) is arranged inside the housing (4); the driving component (2) and the liquid lens body (1) are movably connected, and the driving component (2) is used to drive the liquid lens body (1) to perform zoom adjustment; the sealing component (3) is arranged at the connection between the liquid lens body (1) and the housing (4) and at the connection between the driving component (2) and the liquid lens body (1).

7. The liquid lens-based camera sealing and leak-proof structure according to claim 6, characterized in that: The sealing assembly (3) comprises a first sealing ring (31) and a second sealing ring (32); the first sealing ring (31) is arranged between the edge of the liquid lens body (1) and the inner wall of the housing (4); the second sealing ring (32) is arranged at the connection end between the driving assembly (2) and the liquid lens body (1); the first sealing ring (31) and the second sealing ring (32) are both made of liquid-corrosion-resistant and elastic materials.

8. The liquid lens-based camera sealing and leak-proof structure according to claim 6, characterized in that: The driving assembly (2) comprises a driving rod (21) and a driving source (22); one end of the driving rod (21) is connected to the driving source (22); the other end of the driving rod (21) passes through the housing (4) and is connected to the liquid lens body (1); a third sealing ring (33) is provided at the penetration point between the driving rod (21) and the housing (4); the third sealing ring (33) is sleeved on the driving rod (21) and is tightly fitted with the inner wall of the through hole of the housing (4).

9. The liquid lens-based camera sealing and leak-proof structure according to claim 6, characterized in that: The liquid lens body (1) comprises a receiving cavity (11), two mutually immiscible liquids are arranged inside the receiving cavity (11), a transparent sealing cover (12) is provided at the opening of the receiving cavity (11), and the transparent sealing cover (12) and the edge of the receiving cavity (11) are sealed and connected by a sealant.

10. The liquid lens-based camera sealing and leak-proof structure according to claim 6, characterized in that: The invention also includes a leak detection component (5), the leak detection component (5) including a liquid sensor (51) and an alarm device (52), the liquid sensor (51) being arranged at the bottom of the interior of the housing (4) and near each sealing component (3), the liquid sensor (51) and the alarm device (52) being electrically connected, and when the liquid sensor (51) detects liquid, the alarm device (52) sends an alarm signal.

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