Liquid lens, lens system and display device

Abstract

The embodiment of the invention discloses a liquid lens, a lens system and a display device. In the liquid lens, a second substrate is provided with an opening; the elastic film covers the opening and is connected to the second substrate. The first substrate, the side wall, the second substrate and the elastic film define a containing cavity. The light-transmitting liquid is arranged in the accommodating cavity; the extrusion piece is located on the peripheral side of the open hole. The liquid lens has a plane lens state and a convex lens state, and when the liquid lens is in the plane lens state, the elastic film is in a plane shape; when the liquid lens is in a convex lens state, the extruding piece extrudes the light-transmitting liquid, the light-transmitting liquid extrudes the elastic film, and the elastic film protrudes out of the second substrate and is in a convex curved surface shape. According to the liquid lens, the extruding part is adopted to extrude the light-transmitting liquid, so that the light-transmitting liquid extrudes the elastic film to protrude, and at the moment, the light-transmitting liquid is in a convex lens shape. The protruding amount of the elastic film can be adjusted according to the extrusion degree of the extrusion piece on the light-transmitting liquid, and therefore zooming of the lens is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lenses, in particular to a liquid lens, a lens system and a display device. BACKGROUND

[0002] At present, a lens group composed of multiple lenses is often installed in a mobile phone, and the adjustment of focal length is often completed by changing the distance between lenses, which is one of the reasons why the convexity of the rear camera module of the mobile phone is getting larger. In order to achieve good zoom effect, the mobile phone either adds more lenses, or directly installs a camera similar to a single-lens reflex lens, or uses a periscope zoom which is widely used in current mobile phones. Although the periscope zoom solves the problem of zoom effect, it is still limited by the thickness of the mobile phone and cannot use a large sensor.

[0003] Unlike many existing lens solutions, the liquid lens completes the focusing work by changing the shape of the liquid under force, which allows long focal length and macro function to coexist, saves space for one lens, and reduces the thickness of the camera module.

[0004] However, in the research and practice of the prior art, the inventors of the present application found that the existing liquid lens structure is relatively complex. SUMMARY

[0005] The embodiments of the present application provide a liquid lens, a lens system and a display device, which can simplify the structure of the liquid lens.

[0006] The embodiments of the present application provide a liquid lens, which comprises:

[0007] a first substrate;

[0008] a side wall, which is arranged along the circumferential direction of the first substrate and is arranged on the circumferential area of the first substrate;

[0009] a second substrate, which is arranged on the side of the side wall away from the first substrate, and an opening is formed in the second substrate;

[0010] an elastic film, which covers the opening and is connected to the second substrate, and the first substrate, the side wall, the second substrate and the elastic film define a containing cavity;

[0011] a light-transmitting liquid, which is arranged in the containing cavity and is in contact with the elastic film; and

[0012] a pressing assembly, which comprises a driving member and a pressing member, the pressing member is located on the outer circumferential side of the opening, and the driving member is used to drive the pressing member to press the light-transmitting liquid;

[0013] The liquid lens has a flat lens state and a convex lens state, the elastic film is flat when the liquid lens is in the flat lens state; the extrusion member extrudes the light-transmitting liquid, the light-transmitting liquid extrudes the elastic film, and the elastic film protrudes from the second substrate and is in a convex curved surface shape when the liquid lens is in the convex lens state.

[0014] Optionally, in some embodiments of the present application, the driving member is an electromagnetic coil, the extrusion member comprises a magnetic material, the electromagnetic coil and the extrusion member are spaced apart by the side wall, the electromagnetic coil is located on the side of the side wall away from the accommodating cavity, and the extrusion member is in sliding connection with the first substrate, the second substrate and the side wall respectively;

[0015] The extrusion member is close to the electromagnetic coil when the liquid lens is in the flat lens state; the extrusion member is away from the electromagnetic coil when the liquid lens is in the convex lens state, and the extrusion member, the first substrate, the second substrate and the side wall close to the electromagnetic coil define a first cavity.

[0016] Optionally, in some embodiments of the present application, the extrusion member comprises an elastic shell and a magnetic member, a recess is arranged on the side of the elastic shell close to the electromagnetic coil, and the magnetic member is clamped in the recess;

[0017] The elastic shell is in abutment with the first substrate, the second substrate and the side wall respectively.

[0018] Optionally, in some embodiments of the present application, the electromagnetic coil is arranged on the first substrate, and the height of the extrusion member is greater than the height of the electromagnetic coil with the surface of the first substrate close to the second substrate as a reference;

[0019] The width of the part of the extrusion member close to the first substrate is greater than the width of the part of the extrusion member close to the second substrate.

[0020] Optionally, in some embodiments of the present application, the driving member comprises a first electrode and a second electrode, the first electrode and the second electrode are arranged on opposite sides of the accommodating cavity, the first electrode and the second electrode are spaced apart by the light-transmitting liquid, the extrusion member comprises an electro-deformation material, and one of the first electrode and the second electrode is provided with the extrusion member on the side close to the light-transmitting liquid;

[0021] The extrusion member is in a non-inflated state when the liquid lens is in the flat lens state; the first electrode and the second electrode generate an electric field, and the extrusion member is in an inflated state when the liquid lens is in the convex lens state.

[0022] Optionally, in some embodiments of the present application, the side wall comprises a first side wall, a second side wall, a third side wall and a fourth side wall connected in sequence along the circumferential direction of the first substrate, the first side wall and the third side wall are oppositely arranged, and the second side wall and the fourth side wall are oppositely arranged.

[0023] The first electrode is arranged on the first side wall and located in the accommodation cavity, the second electrode is arranged on the third side wall and located in the accommodation cavity, and the pressing member is arranged on the side of the first electrode away from the first side wall.

[0024] Optionally, in some embodiments of the present application, the thickness of the pressing member decreases from the first side wall to the third side wall.

[0025] Optionally, in some embodiments of the present application, the liquid lens further comprises a cover plate arranged on the side of the side wall away from the second substrate, the cover plate, the side wall, the second substrate and the elastic film define a second cavity.

[0026] When the liquid lens is in the convex lens state, the elastic film protrudes into the second cavity.

[0027] Optionally, in some embodiments of the present application, the inner wall of the side wall is provided with an annular clamping groove, the clamping groove is located between the first substrate and the cover plate, and the second substrate is arranged in the clamping groove.

[0028] Correspondingly, the present application also provides a lens system comprising a photosensitive device, a chip and the liquid lens according to any one of the above embodiments, the photosensitive device is electrically connected to the chip, and the chip is electrically connected to the driving member.

[0029] Correspondingly, the present application also provides a display device comprising a display panel and the lens system according to any one of the above embodiments.

[0030] The liquid lens of the present application comprises a first substrate, a side wall, a second substrate, an elastic film, a light-transmitting liquid and a pressing assembly, the second substrate is provided with an opening; the elastic film covers the opening and is connected to the second substrate, the first substrate, the side wall, the second substrate and the elastic film define an accommodation cavity. The light-transmitting liquid is arranged in the accommodation cavity and is in contact with the elastic film; the pressing assembly comprises a driving member and a pressing member, the pressing member is located on the outer circumferential side of the opening, and the driving member is used to drive the pressing member to press the light-transmitting liquid.

[0031] The liquid lens has a flat lens state and a convex lens state. When the liquid lens is in the flat lens state, the elastic membrane is in a flat state. When the liquid lens is in the convex lens state, the pressing member presses the light-transmitting liquid, the light-transmitting liquid presses the elastic membrane, and the elastic membrane protrudes from the second substrate and is in a convex curved surface state.

[0032] The liquid lens provided in the embodiment of the present application presses the light-transmitting liquid by using the pressing member, so that the light-transmitting liquid presses the elastic membrane to protrude. At this time, the light-transmitting liquid is in a convex lens state. The protrusion amount of the elastic membrane can be adjusted according to the pressing degree of the pressing member on the light-transmitting liquid, so that the variable focus of the lens is realized. In addition, the pressing member directly acts on the light-transmitting liquid in the embodiment of the present application, so that the form of the light-transmitting liquid can be quickly adjusted, which not only simplifies the structure but also improves the response speed. Then, the elastic membrane covers the opening and is connected to the second substrate. The shape of the opening standardizes the shape of the protrusion of the light-transmitting liquid, so as to better maintain the convex lens form. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a top view structural schematic diagram of the liquid lens in the flat lens state provided in the embodiment of the present application;

[0034] Figure 2 is a sectional view structural schematic diagram of the liquid lens in the flat lens state provided in the embodiment of the present application; Figure 1

[0035] Figure 3 is a sectional view structural schematic diagram of the liquid lens in the convex lens state provided in the embodiment of the present application; Figure 1

[0036] Figure 4 is another top view structural schematic diagram of the liquid lens in the flat lens state provided in the embodiment of the present application;

[0037] Figure 5 is a sectional view structural schematic diagram of the liquid lens in the flat lens state provided in the embodiment of the present application;

[0038] Figure 6 is a sectional view structural schematic diagram of the liquid lens in the flat lens state provided in the embodiment of the present application; Figure 5

[0039] Figure 7 is a sectional view structural schematic diagram of the liquid lens in the convex lens state provided in the embodiment of the present application; Figure 5

[0040] Figure 8 is another sectional view structural schematic diagram of the liquid lens in the convex lens state provided in the embodiment of the present application;

[0041] Figure 9 is a structural schematic diagram of a lens system provided in the embodiment of the present application; ​​​​

[0042] Figure 10 Fig. 2 is another structural schematic diagram of the lens system provided by the embodiments of the present application. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with 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 of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative work fall within the scope of protection of the present application. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower in the actual use or working state of the device, and specifically refer to the direction of the drawing surface in the drawings; and "inner" and "outer" refer to the contour of the device; the words "first", "second", "third" and the like are only used as labels, and do not impose numerical requirements or establish sequences.

[0044] The present application provides a liquid lens, a lens system and a display device, which are described in detail below. It should be noted that the description order of the following embodiments is not limited as the preferred order of the embodiments.

[0045] Please refer to Figures 1 to 4 The present application provides a liquid lens 100, which includes a first substrate 11, a side wall 12, a second substrate 13, an elastic film 14, a light-transmitting liquid 15 and a pressing assembly 16.

[0046] The side wall 12 is arranged along the circumferential direction of the first substrate 11 and is arranged on the circumferential area of the first substrate 11. The second substrate 13 is arranged on the side of the side wall 12 away from the first substrate 11, and the second substrate 13 is provided with an opening k1.

[0047] The elastic film 14 covers the opening k1 and is connected to the second substrate 13. The first substrate 11, the side wall 12, the second substrate 13 and the elastic film 14 define a containing cavity 10a. The light-transmitting liquid 15 is arranged in the containing cavity 10a. The light-transmitting liquid 15 is in contact with the elastic film 14.

[0048] The pressing assembly 16 includes a driving member 161 and a pressing member 162. The pressing member 162 is located on the outer circumferential side of the opening k1, and the driving member 161 is used to drive the pressing member 162 to press the light-transmitting liquid 15.

[0049] The liquid lens 100 has a flat lens state and a convex lens state. When the liquid lens 100 is in the flat lens state, the elastic film 14 is flat. When the liquid lens 100 is in the convex lens state, the pressing member 162 presses the light-transmitting liquid 15, the light-transmitting liquid 15 presses the elastic film 14, and the elastic film 14 protrudes from the second substrate 13 and is in a convex curved surface shape.

[0050] The liquid lens 100 in the embodiment of the present application presses the light-transmitting liquid 15 by using the pressing member 162, so that the light-transmitting liquid 15 presses the elastic film 14 to protrude, and at this time, the light-transmitting liquid 15 is in a convex lens shape. The protrusion amount of the elastic film 14 can be adjusted according to the pressing degree of the pressing member 162 on the light-transmitting liquid 15, so as to realize the variable focus of the lens. In addition, the pressing member 162 directly acts on the light-transmitting liquid 15 in the embodiment of the present application, so that the shape of the light-transmitting liquid 15 can be quickly adjusted, which not only simplifies the structure but also improves the response speed; then, the pressing member 162 is always located on the outer periphery side of the opening k1, which avoids the influence of the pressing member 162 on the transmission of light; then, the elastic film 14 covers the opening and is connected to the second substrate 13, and the shape of the opening k1 is used to standardize the shape of the light-transmitting liquid 15 protruding, so as to better maintain the convex lens shape.

[0051] Optionally, the first substrate 11 and the second substrate 13 are hard substrates, which have light-transmitting properties, such as glass substrates or sapphire substrates, etc. Of course, in some embodiments, the second substrate 13 can also be a light-shielding substrate, so as to reduce the influence of interfering light on the lens and the camera, such as coating a light-shielding layer on the side of the second substrate 13 away from the first substrate 11, and the opening k1 also penetrates the light-shielding layer.

[0052] In addition, the light-shielding layer can also shield the pressing member 162, which avoids the pressing member 162 from being seen, affects the appearance, and also reduces the risk of light radiation to the pressing member 162 to form interfering light.

[0053] Optionally, the shape of the opening k1 can be, but is not limited to, circular, elliptical or circular-rectangular. The opening k1 is circular, which can better maintain the light-transmitting liquid 15 in a convex lens shape.

[0054] Optionally, the side wall 12 is a hard side wall, which has good supporting properties. The side wall 12 can be a light-transmitting material or a light-shielding material. When the side wall 12 is a light-shielding material, the influence of interfering light on the camera can be reduced.

[0055] The side wall 12 is in a ring-shaped closed structure, which can be in a circular ring shape, an elliptical ring shape, a rectangular ring shape or other shape structures. The embodiment of the present application takes the rectangular ring shape of the side wall 12 as an example for illustration, but is not limited thereto.

[0056] The side wall 12 comprises a first side wall 121, a second side wall 122, a third side wall 123 and a fourth side wall 124 connected in sequence along the circumferential direction of the first substrate 11. The first side wall 121 and the third side wall 123 are oppositely arranged. The second side wall 122 and the fourth side wall 124 are oppositely arranged.

[0057] Optionally, the elastic film 14 is made of a flexible polymer.

[0058] Optionally, the light-transmitting liquid 15 includes, but is not limited to, one of water, an alcohol solution, a salt solution, silicone oil and chlorobenzene.

[0059] In an embodiment of the present application, the driving member 161 is an electromagnetic coil, and the extrusion member 162 comprises a magnetic material. The electromagnetic coil and the extrusion member 162 are spaced apart by the side wall 12. The electromagnetic coil is located on the side of the side wall 12 away from the accommodating cavity 10a, and the extrusion member 162 is in sliding connection with the first substrate 11, the second substrate 13 and the side wall 12 respectively. Optionally, the electromagnetic coil and the extrusion member 162 are spaced apart by the first side wall 121.

[0060] When the liquid lens 100 is in the planar lens state, the extrusion member 162 is close to the electromagnetic coil; when the liquid lens 100 is in the convex lens state, the extrusion member 162 is away from the electromagnetic coil, and the extrusion member 162, the first substrate 11, the second substrate 13 and the side wall 12 close to the electromagnetic coil jointly define the first cavity 10c.

[0061] In the embodiment of the present application, the electromagnetic coil is used as the driving member 161 to drive the extrusion member 162. That is, the electromagnetic coil generates a magnetic field after being connected with an electric current, and when the magnetic pole of the extrusion member 162 repels the magnetic field of the electromagnetic coil, the extrusion member 162 moves away from the electromagnetic coil to extrude the light-transmitting liquid 15. The greater the magnetic force generated by the electromagnetic coil, the greater the repulsion force on the extrusion member 162, the greater the degree of extrusion of the light-transmitting liquid 15 by the extrusion member 162, the greater the pressure of the light-transmitting liquid 15 extruding the elastic film 14, the greater the convexity of the elastic film 14 from the second substrate 13, and the greater the elastic force of the elastic film 14, and the greater the change in the focal length of the lens. Therefore, the focal length of the lens can be adjusted by adjusting the electric current connected to the electromagnetic coil.

[0062] It should be understood that the light-transmitting liquid 15 extrudes the elastic film 14 to form a convex lens, and the elastic film 14 has an elastic force acting on the light-transmitting liquid 15, and the pressure of the light-transmitting liquid 15 acts on the extrusion member 162 in the opposite direction. When the magnetic force of the electromagnetic coil decreases, the light-transmitting liquid 15 with a greater pressure will push the extrusion member 162 to move in the opposite direction, so as to reset the extrusion member 162.

[0063] In addition, when the direction of the connected electric current is reversed, the magnetic field generated by the electromagnetic coil attracts the extrusion member 162, so that the extrusion member 162 moves faster in the direction of the electromagnetic coil until it abuts against the side wall 12.

[0064] Optionally, in an embodiment of the present application, the electromagnetic coil is arranged on the first substrate 11. The height h1 of the pressing member 162 is greater than the height h2 of the electromagnetic coil, with the surface of the first substrate 11 close to the second substrate 13 as the reference.

[0065] The width d1 of the part of the pressing member 162 close to the first substrate 11 is greater than the width d2 of the part of the pressing member 162 close to the second substrate 13.

[0066] The part of the pressing member 162 close to the first substrate 11 is arranged to be wider, which improves the contact area between the pressing member 162 and the first substrate 11, and also makes the pressing member 162 focus on the lower part, thereby improving the stability of the movement of the pressing member 162. In addition, because the pressure of the light-transmitting liquid 15 on the lower part of the pressing member 162 is greater than that on the upper part, the lower part of the pressing member 162 is widened, which can better resist the pressure of the light-transmitting liquid 15, further improving the stability of the movement of the pressing member 162.

[0067] Optionally, the width d2 of the lower part of the pressing member 162 decreases in the direction from the first substrate 11 to the second substrate 13. The decrease of the width d2 of the lower part of the pressing member 162 facilitates better buffering of the pressure of the light-transmitting liquid 15.

[0068] Optionally, in some embodiments, the width of the pressing member 162 can be consistent in the direction from the first substrate 11 to the second substrate 13.

[0069] Optionally, in an embodiment of the present application, the pressing member 162 comprises an elastic shell 16a and a magnetic member 16b. The side of the elastic shell 16a close to the electromagnetic coil is provided with a groove 16c. The magnetic member 16b is clamped in the groove 16c. The elastic shell 16a abuts against the first substrate 11, the second substrate 13 and the side wall 12, respectively.

[0070] The abutment of the elastic shell 16a against the first substrate 11, the second substrate 13 and the side wall 12, respectively, improves the packaging effect of sealing the light-transmitting liquid 15, and reduces the risk of backflow of the light-transmitting liquid 15.

[0071] Optionally, the elastic shell 16a can be a middle-through structure with both ends open, or a recessed groove structure with one end open, or a structure fully wrapping the magnetic member 16b.

[0072] Of course, in some embodiments, the pressing member 162 can also be a magnetic member, i.e., without the elastic shell 16a.

[0073] Optionally, in one embodiment of this application, the liquid lens 100 further includes a cover plate 17. The cover plate 17 is disposed on the side of the sidewall 12 away from the second substrate 13. The cover plate 17, the sidewall 12, the second substrate 13, and the elastic membrane 14 define a second cavity 10b. When the liquid lens 100 is in the convex lens state, the elastic membrane 14 protrudes into the second cavity 10b.

[0074] The cover plate 17 and side wall 12 forming the second cavity 10b protect the elastic membrane 14, and the sealed second cavity 10b prevents dust from contaminating the elastic membrane 14 and affecting the light transmission effect of the lens.

[0075] Optionally, the cover plate 17 is a rigid cover plate 17 that is light-transmitting.

[0076] Optionally, in one embodiment of this application, the inner wall of the sidewall 12 is provided with an annular snap-fit ​​groove 12a, which is located between the first substrate 11 and the cover plate 17. The second substrate 13 is disposed within the snap-fit ​​groove 12a.

[0077] The placement of the second substrate 13 within the snap-fit ​​groove 12a not only improves the stability and reduces the width of the second substrate 13, but also enhances its resistance to the pressure of the light-transmitting liquid 15.

[0078] Please refer to Figures 5 to 8 In another embodiment of this application, the difference from the above embodiment is that an electric field is used to drive the expansion of the electrodeformable material instead of an electromagnetically driven magnetic component.

[0079] The driving member 161 includes a first electrode 16d and a second electrode 16f. The first electrode 16d and the second electrode 16f are disposed on opposite sides of the receiving cavity 10a. A light-transmitting liquid 15 is spaced between the first electrode 16d and the second electrode 16f. The extrusion member 162 includes an electrodeformable material. The extrusion member 162 is disposed on the side of one of the first electrode 16d and the second electrode 16f closest to the light-transmitting liquid 15.

[0080] When the liquid lens 100 is in the planar lens state, the extruder 162 is in a non-expanded state. When the liquid lens 100 is in the convex lens state, the first electrode 16d and the second electrode 16f generate an electric field, and the extruder 162 is in an expanded state.

[0081] In this process, the first electrode 16d and the second electrode 16f are connected to different voltages, creating a pressure difference between them and forming an electric field. Under the influence of this electric field, the extruder 162 deforms and expands along the direction of the electric field to compress the transparent liquid 15. Furthermore, the greater the electric field strength, the greater the expansion of the extruder 162, and the greater the compression of the transparent liquid 15.

[0082] That is, the expansion degree of the extrusion member 162 can be adjusted by adjusting the electric field intensity, and the focal length of the lens can be adjusted.

[0083] The first electrode 16d is disposed on the first side wall 121 and located in the accommodation cavity 10a. The second electrode 16f is disposed on the third side wall 123 and located in the accommodation cavity 10a. The extrusion member 162 is disposed on the side of the first electrode 16d away from the first side wall 121.

[0084] The extrusion member 162 is located on the outer circumferential side of the opening k1 after expansion, so as to avoid affecting the transmission of light.

[0085] In some embodiments, the first electrode 16d can be disposed on the region of the first substrate 11 corresponding to the second substrate 13, and the second electrode 16f is disposed on the side of the second substrate 13 close to the first substrate 11. The extrusion member 162 is disposed on the first electrode 16d or the second electrode 16f.

[0086] Optionally, in an embodiment of the present application, the thickness g1 of the extrusion member 162 decreases from the first side wall 121 to the third side wall 123. Such a design can improve the efficiency of extruding the light-transmitting liquid 15, and can slow down the force of the light-transmitting liquid 15 acting on the extrusion member 162.

[0087] Optionally, the cross-sectional pattern of the extrusion member 162 is triangular or triangular-like.

[0088] Correspondingly, please refer to Figure 9 The present application also provides a lens system 1000, which comprises a photosensitive device 200, a chip 300, and a liquid lens as described in any one of the above embodiments. The photosensitive device 200 is electrically connected to the chip 300. The chip 300 is electrically connected to the driving member 161.

[0089] Optionally, the liquid lens of the lens system 1000 of the present embodiment is the liquid lens 100 as described in any one of the above embodiments, and the structure of the liquid lens 100 of the present embodiment is the same as that of the liquid lens 100 of any one of the above embodiments, and thus will not be described here.

[0090] Optionally, the photosensitive device 200 is used to sense the ambient light, so as to generate a current and transmit the current to the chip 300. The chip 300 amplifies the current to an electromagnetic coil in proportion, and then generates a magnetic force acting on the extrusion member 162.

[0091] Optionally, the photosensitive device 200 can be a photosensitive diode or other device.

[0092] In some embodiments, please refer to Figure 10The driving member 161 includes a first electrode 16d and a second electrode 16f, and the extruding member 162 includes an electroactive material.

[0093] The photosensitive device 200 is used to sense ambient light, to generate current, and to transmit the current to the chip 300. The chip 300 provides different voltages to the first electrode 16d and the second electrode 16f according to the current, so that the first electrode 16d and the second electrode 16f generate an electric field.

[0094] Correspondingly, the application also provides a display device, which includes a display panel and the lens system according to any one of the above embodiments.

[0095] The lens system of the display device according to the application is similar or identical to the lens system 1000 according to any one of the above embodiments, and thus is not described here again.

[0096] Optionally, the display device can be at least one of a smartphone, a tablet computer, a mobile phone, a video phone, a desktop computer, a laptop computer, a netbook, a workstation, a server, a personal digital assistant, a portable media player, a television, a camera, a game console, a digital camera, a car navigation device, a car display screen, an automatic teller machine, or a wearable device.

[0097] The liquid lens of the display device according to the application includes a first substrate, a sidewall, a second substrate, an elastic film, a light-transmitting liquid, and an extruding assembly. The second substrate is provided with an opening. The elastic film covers the opening and is connected to the second substrate. The first substrate, the sidewall, the second substrate, and the elastic film define a containing cavity. The light-transmitting liquid is arranged in the containing cavity and is in contact with the elastic film. The extruding assembly includes a driving member and an extruding member. The extruding member is located at the outer circumferential side of the opening. The driving member is used to drive the extruding member to extrude the light-transmitting liquid.

[0098] The liquid lens has a planar lens state and a convex lens state. When the liquid lens is in the planar lens state, the elastic film is in a planar shape. When the liquid lens is in the convex lens state, the extruding member extrudes the light-transmitting liquid, the light-transmitting liquid extrudes the elastic film, the elastic film protrudes from the second substrate and is in a convex curved surface shape.

[0099] The liquid lens of the embodiment of the present application extrudes the light-transmitting liquid by the extrusion member, so that the light-transmitting liquid extrudes the elastic film to protrude, at this time, the light-transmitting liquid is in the shape of a convex lens. The protrusion amount of the elastic film can be adjusted according to the extrusion degree of the extrusion member on the light-transmitting liquid, so as to realize the variable focus of the lens. In addition, the embodiment of the present application directly acts on the light-transmitting liquid by the extrusion member, so that the shape of the light-transmitting liquid can be quickly adjusted, which not only simplifies the structure but also improves the response speed; then, the extrusion member is always located at the outer circumferential side of the opening, avoiding the extrusion member from affecting the transmission of light; then, the elastic film covers the opening and is connected to the second substrate, the shape of the opening is used to standardize the shape of the protrusion of the light-transmitting liquid, so as to better maintain the shape of the convex lens.

[0100] The above describes the liquid lens, the lens system and the display device provided by the embodiment of the present application in detail, the principle and the implementation mode of the present application are described in this paper by applying specific examples, the above embodiment is only used to help understand the method and the core idea of the present application; at the same time, for the person skilled in the art, according to the idea of the present application, the specific implementation mode and the application range will be changed, according to the above, the content of the specification should not be understood as the limitation of the present application.

Claims

1. A liquid lens, characterized by, The liquid lens comprises: a first substrate; a side wall extending along a peripheral direction of the first substrate and arranged on a peripheral region of the first substrate; a second substrate arranged on a side of the side wall away from the first substrate, the second substrate being provided with an opening; an elastic film covering the opening and connected to the second substrate, the first substrate, the side wall, the second substrate and the elastic film defining a containing cavity; a light-transmitting liquid arranged in the containing cavity and in contact with the elastic film; and a pressing assembly comprising a driving member and a pressing member, the pressing member being located on a peripheral side of the opening, and the driving member being configured to drive the pressing member to press the light-transmitting liquid. The liquid lens has a flat lens state and a convex lens state, in the flat lens state, the elastic film is flat, and in the convex lens state, the pressing member presses the light-transmitting liquid, the light-transmitting liquid presses the elastic film, the elastic film protrudes from the second substrate and is in a convex curved surface shape. The driving member is an electromagnetic coil, the pressing member comprises a magnetic material, the electromagnetic coil and the pressing member are separated by the side wall, the electromagnetic coil is located on a side of the side wall away from the containing cavity, and the pressing member is in sliding connection with the first substrate, the second substrate and the side wall, respectively.

2. The liquid lens of claim 1, wherein, In the flat lens state, the pressing member is close to the electromagnetic coil, and in the convex lens state, the pressing member is away from the electromagnetic coil, and the pressing member, the first substrate, the second substrate and the side wall close to the electromagnetic coil define a first cavity. The pressing member comprises an elastic shell and a magnetic member, the elastic shell is provided with a groove on a side close to the electromagnetic coil, and the magnetic member is clamped in the groove.

3. The liquid lens of claim 2, wherein, The elastic shell is in abutment with the first substrate, the second substrate and the side wall, respectively. The electromagnetic coil is arranged on the first substrate, and the height of the pressing member is greater than the height of the electromagnetic coil, based on a surface of the first substrate close to the second substrate as a reference.

4. The liquid lens of claim 3, wherein, The width of a portion of the pressing member close to the first substrate is greater than the width of a portion of the pressing member close to the second substrate. The driving member comprises a first electrode and a second electrode, the first electrode and the second electrode are arranged on opposite sides of the containing cavity, the first electrode and the second electrode are separated by the light-transmitting liquid, the pressing member comprises an electro-deformation material, and one of the first electrode and the second electrode is provided with the pressing member on a side close to the light-transmitting liquid.

5. The liquid lens of claim 1, wherein, In the flat lens state, the pressing member is in a non-inflated state, and in the convex lens state, the first electrode and the second electrode generate an electric field, and the pressing member is in an inflated state. ​ 6. The liquid lens of claim 5, wherein, The side wall comprises a first side wall, a second side wall, a third side wall and a fourth side wall connected in sequence along the circumferential direction of the first substrate, the first side wall and the third side wall are oppositely arranged, and the second side wall and the fourth side wall are oppositely arranged. The first electrode is arranged on the first side wall and located in the accommodating cavity, the second electrode is arranged on the third side wall and located in the accommodating cavity, and the pressing member is arranged on the side of the first electrode away from the first side wall.

7. The liquid lens of claim 6, wherein, The thickness of the pressing member decreases from the first side wall to the third side wall.

8. The liquid lens of any one of claims 1-7, wherein, The liquid lens further comprises a cover plate arranged on the side of the side wall away from the second substrate, the cover plate, the side wall, the second substrate and the elastic film define a second cavity. When the liquid lens is in the convex lens state, the elastic film protrudes into the second cavity.

9. The liquid lens of claim 8, wherein, The inner wall of the side wall is provided with an annular clamping groove, the clamping groove is located between the first substrate and the cover plate, and the second substrate is arranged in the clamping groove.

10. A lens system characterized by comprising: The liquid lens comprises a photosensitive device, a chip and a liquid lens as claimed in any one of claims 1-9, the photosensitive device is electrically connected to the chip, and the chip is electrically connected to the driving member.

11. A display device, characterized by comprising: The lens system comprises a display panel and a lens system as claimed in claim 10.

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