Liquid lens, lens device, and method for manufacturing liquid lens

Abstract

The invention provides a liquid lens, a lens device and a manufacturing method of the liquid lens. The liquid lens comprises two transparent circuit boards, an annular circuit structure, light-transmitting liquid and a pump. The two transparent circuit boards are arranged opposite to each other, each transparent circuit board is provided with an inner surface and an outer surface opposite to the inner surface, and the inner surface is located between the outer surfaces of the two transparent circuit boards. The annular circuit structure is connected with and surrounds the two transparent circuit boards, wherein an accommodating space is formed between the inner surfaces of the two transparent circuit boards. The light-transmitting liquid has the refractive index larger than 1 and fills the containing space, and the pressure of the light-transmitting liquid in the containing space is used for enabling the two transparent circuit boards to deform so as to enable the outer surfaces to form curved surfaces. The connecting piece connects a plurality of liquid lenses to form a lens device. According to the liquid lens and the lens device, the focal length can be adjusted, and the placing space of the lens can be reduced.

Description

Technical Field

[0001] This invention relates to a lens device, and more particularly to a lens device for adjusting focal length and a method for manufacturing the same. Background Technology

[0002] Currently, wearable display devices used for Augmented Reality (AR), Virtual Reality (VR), and Mixed Reality (MR) typically have a screen distance between the display and the user's eyes that is less than the distance of sight. Therefore, these devices require lenses to ensure the user can see the image clearly. However, the limited internal space of these wearable display devices further complicates and restricts the installation of these lenses. Summary of the Invention

[0003] At least one embodiment of the present invention provides a liquid lens and lens device, which, compared with conventional optical lenses, can adjust the focal length and help reduce the space required for lens placement.

[0004] At least one embodiment of the present invention provides a method for manufacturing the above-described liquid lens.

[0005] At least one embodiment of the present invention provides a liquid lens comprising two transparent circuit boards, a ring-shaped circuit structure, a light-transmitting liquid, and a pump. The two transparent circuit boards are arranged opposite each other, each having an inner surface and an outer surface opposite to the inner surface, with the inner surface located between the outer surfaces of the two transparent circuit boards. The ring-shaped circuit structure connects and surrounds the two transparent circuit boards, forming a receiving space between the inner surfaces of the two transparent circuit boards and having an injection port communicating with the receiving space. The light-transmitting liquid fills the receiving space, wherein the pressure of the light-transmitting liquid within the receiving space is used to deform the two transparent circuit boards. The light-transmitting liquid comprises water and gelatin, wherein the ratio of water to gelatin is between 0.063 and 0.2, and the refractive index of the light-transmitting liquid is greater than or equal to 1.4. The pump is connected to the ring-shaped circuit structure and injects the light-transmitting liquid into the receiving space through the injection port, wherein the pump is used to control the pressure of the light-transmitting liquid within the receiving space. When the pump controls the pressure of the light-transmitting liquid within the receiving space to be less than the external pressure, the outer surfaces of the transparent circuit boards form concave curved surfaces. When the pump controls the pressure of the transparent liquid within the containment space to be greater than the external pressure, the outer surface of these transparent circuit boards forms a convex curved surface.

[0006] In at least one embodiment of the present invention, the ratio of water to gelatin in the above-mentioned transparent liquid is between 0.123 and 0.124, and the refractive index of the transparent liquid is greater than or equal to 1.415.

[0007] In at least one embodiment of the present invention, the above-mentioned transparent liquid further includes a dye.

[0008] In at least one embodiment of the present invention, each of the two transparent circuit boards includes a circuit layer, and the circuit layer of at least one transparent circuit board is made of transparent conductive adhesive.

[0009] At least one embodiment of the present invention provides a lens device comprising a plurality of liquid lenses and connectors. Each of the plurality of liquid lenses includes two transparent circuit boards, a ring-shaped circuit structure, a light-transmitting liquid, and a pump. The two transparent circuit boards are arranged opposite each other, each having an inner surface and an outer surface opposite to the inner surface, with the inner surface located between the outer surfaces of the two transparent circuit boards. The ring-shaped circuit structure connects to and surrounds the two transparent circuit boards, forming a receiving space between the inner surfaces of the two transparent circuit boards. The light-transmitting liquid fills the receiving space, wherein the pressure of the light-transmitting liquid within the receiving space is used to deform the two transparent circuit boards. The light-transmitting liquid comprises water and gelatin, wherein the ratio of water to gelatin is between 0.063 and 0.2, and the refractive index of the light-transmitting liquid is greater than or equal to 1.4. The pump is connected to the ring-shaped circuit structure and injects the light-transmitting liquid into the receiving space through an injection port, wherein the pump is used to control the pressure of the light-transmitting liquid within the receiving space. When the pump controls the pressure of the light-transmitting liquid within the receiving space to be less than the external pressure, the outer surfaces of the transparent circuit boards form concave curved surfaces. When the pump controls the pressure of the transparent liquid within the containment space to be greater than the external pressure, the outer surface of these transparent circuit boards forms a convex curved surface. Connectors link multiple liquid lenses.

[0010] In at least one embodiment of the present invention, a lens device is provided in which the liquid lenses are stacked on top of each other, and the outer surfaces of two of the plurality of liquid lenses face each other.

[0011] In at least one embodiment of the present invention, a lens device is provided, wherein each of the above-mentioned annular circuit structures has an injection port, wherein in the same liquid lens, the injection port communicates with a accommodating space, and a connector is located between two injection ports.

[0012] At least one embodiment of the present invention provides a method for manufacturing a liquid lens, comprising forming an initial circuit substrate and a sacrificial layer, wherein the initial circuit substrate surrounds the sacrificial layer, and two film layers of the initial circuit substrate sandwich the sacrificial layer; forming two transparent circuit boards on opposite sides of the sacrificial layer. After forming the two transparent circuit boards, the initial circuit substrate is cut to form a cut section, wherein the cut section exposes the sacrificial layer. After cutting the initial circuit substrate, the sacrificial layer is removed to form an accommodating space between the two transparent circuit boards, wherein each of the two transparent circuit boards has an inner surface and an outer surface opposite to the inner surface, and the inner surface is located between the outer surfaces of the two transparent circuit boards. A light-transmitting liquid is injected into the accommodating space using a pump. When the pump controls the pressure of the light-transmitting liquid in the accommodating space to be less than the external pressure, the outer surfaces of these transparent circuit boards form concave curved surfaces. When the pump controls the pressure of the light-transmitting liquid in the accommodating space to be greater than the external pressure, the outer surfaces of these transparent circuit boards form convex curved surfaces.

[0013] At least one embodiment of the present invention provides a method for manufacturing a liquid lens, wherein the method for removing the sacrificial layer includes heating the sacrificial layer.

[0014] In at least one embodiment of the present invention, the sacrificial layer is made of polyvinyl carbonate.

[0015] Based on the above, in the liquid lens and lens device disclosed in the above embodiments of the present invention, a receiving space is formed by two transparent circuit boards, and a light-transmitting liquid is injected into the receiving space to achieve the effect of a lens. Compared with traditional lenses, the liquid lens and lens device provided in the embodiments of the present invention are more suitable for application in wearable display devices for AR, VR, or MR. Attached Figure Description

[0016] To make the above and other features, advantages and embodiments of the present invention more apparent and understandable, the detailed description of the accompanying drawings is as follows:

[0017] Figure 1A This is a top view schematic diagram of a liquid lens according to at least one embodiment of the present invention.

[0018] Figure 1B yes Figure 1A A cross-sectional schematic diagram of a liquid lens.

[0019] Figures 2A to 2C These are cross-sectional schematic diagrams of liquid lenses in different states.

[0020] Figure 3 and Figure 4 This is a cross-sectional schematic diagram of the lens device.

[0021] Figures 5A to 5E yes Figure 1B A cross-sectional schematic diagram of the manufacturing method of the liquid lens in the diagram. Detailed Implementation

[0022] In the following text, to clearly present the technical features of this application, the dimensions (e.g., length, width, thickness, and depth) of the elements (e.g., layers, films, substrates, and regions) in the accompanying drawings will be enlarged proportionally, and the number of some elements may be reduced. Therefore, the description and explanation of the embodiments below are not limited to the number of elements in the drawings or the size and shape of the elements, but should cover dimensions, shapes, and deviations from both due to actual manufacturing processes and / or tolerances. For example, a flat surface shown in the drawings may have rough and / or non-linear characteristics, and an acute angle shown in the drawings may be rounded. Therefore, the elements presented in the accompanying drawings are primarily for illustrative purposes and are not intended to precisely depict the actual shape of the elements, nor are they intended to limit the scope of the claims in this application.

[0023] Secondly, the terms "approximately," "approximately," or "substantially" used in this application not only encompass explicitly stated numerical values ​​and ranges, but also the permissible deviation range understood by a person skilled in the art. This deviation range can be determined by errors that occur during measurement, such as those arising from limitations of the measurement system or process conditions. Furthermore, "approximately" can indicate a deviation within one or more standard deviations of the aforementioned numerical values, such as ±30%, ±20%, ±10%, or ±5%. The use of terms such as "approximately," "approximately," or "substantially" in this application allows for the selection of acceptable deviation ranges or standard deviations based on optical, etching, mechanical, or other properties, and does not apply to all optical, etching, mechanical, and other properties using a single standard deviation.

[0024] Figure 1A This is a top view schematic diagram of a liquid lens 100 according to at least one embodiment of the present invention, and Figure 1B yes Figure 1A A schematic cross-sectional view of the liquid lens 100 drawn along section line AA". Please refer to Figure 1A and Figure 1B The liquid lens 100 includes two transparent circuit boards 110, a ring-shaped circuit structure 120, a light-transmitting liquid 140, and a pump 150. The liquid lens 100 is suitable for VR, AR, or MR wearable display devices, such as VR, AR, or MR glasses. Figure 1A As can be seen, the outline of the ring circuit structure 120 can be circular. In other embodiments, the outline of the ring circuit structure 120 can be elliptical, rectangular, polygonal, or other arbitrary shapes, but is not limited thereto.

[0025] Figure 1AThe annular circuit structure 120 surrounds a transparent circuit board 110. The transparent circuit board 110 includes a circuit layer 116, which can be distributed along the annular circuit structure 120, and the surrounding space is an accommodating space 130. Two transparent circuit boards 110 are arranged opposite to each other, each of the two transparent circuit boards 110 having an inner surface 112 and an outer surface 114 opposite to the inner surface 112, with the inner surface 112 located between the outer surfaces 114 of the two transparent circuit boards 110.

[0026] The transparent circuit board 110 also includes a dielectric layer 111, wherein the circuit layer 116 is located within the dielectric layer 111. The dielectric layer 111 may have a multilayer structure. Figure 1B For example, each dielectric layer 111 may include three layers (not shown): an outer cover layer 443 and two middle insulating layers 441 and 442, wherein the insulating layer 442 may be a resin layer and covers the circuit layer 116. The transparent circuit board 110 is flexible and can be bent. For example, the transparent circuit board 110 can be bent into a U-shape.

[0027] In addition, the transparent circuit board 110 may be a flexible printed circuit (FPC), wherein the insulating material of the FPC (e.g., dielectric layer 111) may be polyimide (PI), thermoplastic polyimide (TPI), polyethylene terephthalate (PET), or polyethylene (PE), but is not limited to these.

[0028] In other embodiments, the circuit layer 116 of the transparent circuit board 110 may be made of a transparent conductive adhesive, such as silver paste containing silver nanowires. Alternatively, the circuit layer 116 may also be made of conductive graphite.

[0029] A ring-shaped circuit structure 120 connects and surrounds two transparent circuit boards 110, wherein an accommodating space 130 is formed between the inner surfaces 112 of the two transparent circuit boards 110. The ring-shaped circuit structure 120 has an inlet 125 that communicates with the accommodating space 130. A light-transmitting liquid 140 has a refractive index greater than 1 and fills the accommodating space 130, wherein the light-transmitting liquid 140 can enter the accommodating space 130 from the inlet 125, and the pressure of the light-transmitting liquid 140 within the accommodating space 130 is used to deform the two transparent circuit boards 110 to form a curved surface (not shown) on the outer surface 114.

[0030] The light-transmitting liquid 140 may comprise water and gelatin, wherein the ratio of water to gelatin is between 0.063 and 0.2. That is, the water-to-gelatin ratio can be 16:84 or 6:94, while a preferred water-to-gelatin ratio for the light-transmitting liquid 140 is 11:89, i.e., a ratio between 0.123 and 0.124. Furthermore, the refractive index of the light-transmitting liquid 140 is greater than or equal to 1.4. For example, when the water-to-gelatin ratio of the light-transmitting liquid 140 is 11:89 (a ratio between 0.123 and 0.124), the refractive index of the light-transmitting liquid 140 will be greater than or equal to 1.415.

[0031] Water and gelatin can be mixed in different proportions to obtain gels of different proportions. Different proportions of gels result in different refractive indices, thus allowing for the creation of lenses with different focal lengths. The light-transmitting liquid 140 can be a transparent, colorless liquid or a colored transparent liquid. When the light-transmitting liquid 140 is a colored transparent liquid, it may also contain dyes, such as natural pigments.

[0032] exist Figure 1B In the illustrated embodiment, the liquid lens 100 further includes a pump 150, which is connected to the annular circuit structure 120 and injects the light-transmitting liquid 140 into the accommodating space 130 through the injection port 125. The pump 150 is used to control the pressure of the light-transmitting liquid 140 within the accommodating space 130.

[0033] Figures 2A to 2C This is a cross-sectional schematic diagram of the liquid lens 100 in different states. Please refer to [link / reference]. Figure 2A Pump 150 injects light-transmitting liquid 140 into the receiving space 130 through injection port 125. When pump 150 controls the pressure of light-transmitting liquid 140 in the receiving space 130 to be balanced with the external pressure (e.g., 1 atmosphere), the liquid lens 100 is in the state of a plane lens.

[0034] Please see Figure 2B When pump 150 discharges the transparent liquid 140 from injection port 125 outside the receiving space 130, that is, when pump 150 controls the pressure of the transparent liquid 140 inside the receiving space 130 to be less than the external pressure, the two transparent circuit boards 110 will deform to form a curved surface on the outer surface 114, such as... Figure 2B The concave surface is shown. At this point, the liquid lens 100 is a biconcave lens, which can be used to help nearsighted people see images more clearly.

[0035] Please see Figure 2C Pump 150 injects transparent liquid 140 into the receiving space 130 through injection port 125, so that pump 150 controls the pressure of transparent liquid 140 in receiving space 130 to be greater than the external pressure. At this time, the two transparent circuit boards 110 will also deform, so that the outer surface 114 forms a curved surface, such as... Figure 2C The convex surface is shown. At this point, the liquid lens 100 is a biconvex lens, which can be used to help people with farsightedness see images more clearly.

[0036] Figure 3 This is a cross-sectional schematic diagram of the lens assembly 200. Please refer to [link / reference]. Figure 3 Two liquid lenses 100 are connected to each other. Each annular circuit structure 120 of the lens assembly 200 has an inlet 125, wherein in the same liquid lens 100, the inlet 125 communicates with a accommodating space 130. A pump 150 is connected to the annular circuit structure 120 and injects light-transmitting liquid 140 from the inlet 125 into the accommodating space 130, wherein the pump 150 is used to control the pressure of the light-transmitting liquid 140 within the accommodating space 130. A connector 160 is located between the inlets 125 of the two lens assemblies 200. Figure 3 In some embodiments, it can be used in VR, AR, or MR glasses.

[0037] Figure 4 This is a cross-sectional schematic diagram of the lens assembly 300. Please refer to [link / reference]. Figure 4 Two liquid lenses 100 are stacked on top of each other, with the outer surfaces 114 of two of the liquid lenses 100 facing each other. Each of the annular circuit structure 120 of the lens assembly 300 has an inlet 125, wherein in the same liquid lens 100, the inlet 125 communicates with the accommodating space 130. Figure 4 In the illustrated embodiment, the liquid lens 100 consists of two biconvex lenses stacked on top of each other. In other embodiments, the liquid lens 100 may not consist of only two biconvex lenses stacked on top of each other; it may consist of one biconcave lens and the other biconvex lens; or the liquid lens 100 may consist of two biconcave lenses. It can be used in optical devices such as telescopes.

[0038] Furthermore, in other embodiments, the number of liquid lenses 100 stacked on top of each other is not limited to two, nor is it limited to stacking them in a biconvex lens configuration. The number of connectors 160 is also not limited to two.

[0039] Figures 5A to 5E yes Figure 1B A cross-sectional schematic diagram of the manufacturing method of the liquid lens 100. Please refer to... Figure 5A An initial circuit board 420 and a sacrificial layer 430 are formed, wherein the initial circuit board 420 surrounds the sacrificial layer 430 (which can be combined with...). Figure 1A (See also), and Figure 1A The ring circuit structure 120 corresponds to this Figure 5AThe initial circuit board 420. A sacrificial layer 430 is sandwiched between two film layers 425 of the initial circuit board 420, wherein the film layer 425 may be an insulating layer (not shown), and the material of the sacrificial layer 430 may be, for example, polypropylene carbonate (PPC).

[0040] Please see Figure 5B Two conductive layers 440 and two insulating layers 441 are applied to the opposite surfaces of the sacrificial layer 430, with the insulating layers 441 positioned between the conductive layers 440. See also... Figure 5C Next, a conductive layer 440 is patterned and electrically connected to the initial circuit board 420, wherein the initial circuit board 420 is electrically connected via conductive blind vias. Then, a circuit layer 116 is formed. Next, an insulating layer 442 and a cover layer 443 are applied to the circuit layer 116. At this point, a dielectric layer 111 comprising insulating layers 441 and 442 and a cover layer 443 has essentially been formed.

[0041] Please see Figure 5D After forming two transparent circuit boards 110 and completing the circuit layer 116, the initial circuit substrate 420 is cut to form a cut section 450. During the cutting of the initial circuit substrate 420, the film layer 425 is cut so that the cut section 450 exposes the sacrificial layer 430.

[0042] Please see Figure 5E After cutting the initial circuit board 420, the sacrificial layer 430 is removed to form an accommodating space 130 between the two transparent circuit boards 110. Then, a light-transmitting liquid 140 is injected into the accommodating space 130. The method for removing the sacrificial layer 430 includes heating the sacrificial layer 430. Figure 5E In the illustrated embodiment, the light-transmitting liquid 140 is injected into the accommodating space 130 from the injection port 125 using a pump 150, wherein the pump 150 is used to control the pressure of the light-transmitting liquid 140 in the accommodating space 130.

[0043] In summary, in the liquid lens 100 of at least one embodiment of the present invention, a receiving space 130 is formed by two transparent circuit boards 110, and a light-transmitting liquid 140 is injected into the receiving space 130 to achieve the effect of a lens. Since the liquid lens 100 and lens devices 200 and 300 of at least one embodiment of the present invention can adjust the viewing distance and assist in adjusting the focal length, it helps to accommodate most people with myopia and hyperopia to use AR, VR, or MR wearable display devices.

[0044] While this application has disclosed various embodiments above, it is not intended to limit this application. The above outlines components of several embodiments to facilitate a better understanding of the inventive embodiments by those skilled in the art. Those skilled in the art should understand that they can design or modify other processes and structures based on the embodiments of this invention to achieve the same purpose and / or advantages as the embodiments described herein. Those skilled in the art should also understand that such equivalent processes and structures do not depart from the spirit and scope of this invention, and that various changes, substitutions, and replacements can be made without departing from the spirit and scope of this invention. Therefore, the scope of protection of this application shall be determined by the appended claims.

[0045] [Symbol Explanation]

[0046] 100: Liquid Lens

[0047] 200, 300: Lens assembly

[0048] 110: Transparent Circuit Board

[0049] 111: Dielectric layer

[0050] 112: Inner surface

[0051] 114: Outer surface

[0052] 116: Line Layer

[0053] 120: Ring circuit structure

[0054] 125: Injection port

[0055] 130: Storage space

[0056] 140: Translucent liquid

[0057] 150: Pump

[0058] 160: Connector

[0059] 420: Initial circuit board

[0060] 425: Film layer

[0061] 430: Sacrifice Layer

[0062] 440: Conductive layer

[0063] 441, 442: Insulation layer

[0064] 443: Overlay

[0065] 450: Cutting section

[0066] AA”: Section line.

Claims

1. A liquid lens, characterized in that, include: Two transparent circuit boards are arranged opposite each other, wherein each of the two transparent circuit boards has an inner surface and an outer surface opposite to the inner surface, and the inner surface is located between the outer surfaces of the two transparent circuit boards. A ring-shaped circuit structure connects and surrounds the two transparent circuit boards, wherein an accommodating space is formed between the inner surfaces of the two transparent circuit boards and an injection port is provided, and the injection port communicates with the accommodating space. A translucent liquid fills the accommodating space, wherein the pressure of the translucent liquid within the accommodating space is used to deform the two transparent circuit boards, and the translucent liquid comprises water and gelatin, wherein the ratio of water to gelatin is between 0.063 and 0.2, and the refractive index of the translucent liquid is greater than or equal to 1.4; and A pump is connected to the annular circuit structure and injects the light-transmitting liquid into the accommodating space from the injection port, wherein the pump is used to control the pressure of the light-transmitting liquid in the accommodating space; When the pump controls the pressure of the transparent liquid within the accommodating space to be less than the external pressure, the outer surfaces of the two transparent circuit boards form concave curved surfaces. When the pump controls the pressure of the transparent liquid within the accommodating space to be greater than the external pressure, the outer surfaces of the two transparent circuit boards form convex curved surfaces.

2. The liquid lens according to claim 1, characterized in that, The ratio of water to gelatin in the transparent liquid is between 0.123 and 0.124, and the refractive index of the transparent liquid is greater than or equal to 1.

415.

3. The liquid lens according to claim 2, characterized in that, The light-transmitting liquid also includes dyes.

4. The liquid lens according to claim 1, characterized in that, Each of the two transparent circuit boards includes a circuit layer, and the circuit layer of at least one of the transparent circuit boards is made of transparent conductive adhesive.

5. A lens device, characterized in that, include: Multiple liquid lenses, each comprising: Two transparent circuit boards are arranged opposite each other, wherein each of the two transparent circuit boards has an inner surface and an outer surface opposite to the inner surface, and the inner surface is located between the outer surfaces of the two transparent circuit boards. A ring-shaped circuit structure connects and surrounds the two transparent circuit boards, wherein an accommodating space is formed between the inner surfaces of the two transparent circuit boards; A light-transmitting liquid fills the accommodating space, wherein the pressure of the light-transmitting liquid within the accommodating space is used to deform the two transparent circuit boards, and the light-transmitting liquid comprises water and gelatin, wherein the ratio between water and gelatin is between 0.063 and 0.2, and the refractive index of the light-transmitting liquid is greater than or equal to 1.

4. A pump is connected to the annular circuit structure and injects the light-transmitting liquid into the accommodating space from the injection port, wherein the pump is used to control the pressure of the light-transmitting liquid in the accommodating space; When the pump controls the pressure of the transparent liquid within the accommodating space to be less than the external pressure, the outer surfaces of the two transparent circuit boards form concave curved surfaces. When the pump controls the pressure of the transparent liquid within the accommodating space to be greater than the external pressure, the outer surfaces of the two transparent circuit boards form convex curved surfaces; and A connector for connecting the plurality of liquid lenses.

6. The lens device according to claim 5, characterized in that, The liquid lenses are stacked on top of each other, and the outer surfaces of two of the plurality of liquid lenses face each other.

7. The lens device according to claim 5, characterized in that, Each of the ring circuit structures has an injection port. Within the same liquid lens, the injection port communicates with the accommodating space. The connector is located between the two injection ports.

8. A method for manufacturing a liquid lens, characterized in that, include: An initial circuit substrate and a sacrificial layer are formed, wherein the initial circuit substrate surrounds the sacrificial layer, and two film layers of the initial circuit substrate sandwich the sacrificial layer: Two transparent circuit boards are formed on opposite sides of the sacrificial layer, wherein each of the two transparent circuit boards has an inner surface and an outer surface opposite to the inner surface, and the inner surface is located between the outer surfaces of the two transparent circuit boards. After the two transparent circuit boards are formed, the initial circuit board is cut to form a cut section, wherein the cut section exposes the sacrificial layer. After cutting the initial circuit board, the sacrificial layer is removed to form an accommodating space between the two transparent circuit boards; as well as A light-transmitting liquid is injected into the accommodating space using a pump, wherein when the pump controls the pressure of the light-transmitting liquid in the accommodating space to be less than the external pressure, the outer surfaces of the two transparent circuit boards form concave curved surfaces. When the pump controls the pressure of the transparent liquid within the accommodating space to be greater than the external pressure, the outer surfaces of the two transparent circuit boards form convex curved surfaces.

9. The method for manufacturing a liquid lens according to claim 8, characterized in that, The method of removing the sacrificial layer includes heating the sacrificial layer.

10. The method for manufacturing a liquid lens according to claim 8, characterized in that, The sacrificial layer is made of polyvinyl carbonate.

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