A light filtering device, camera and light source

Abstract

The embodiment of the present application discloses a kind of light filter device, camera and light source.The light filter device includes: electrochromic device;Electrochromic device includes the electrochromic layer, first superimposed layer and first substrate of laminated arrangement;Wherein, electrochromic layer includes: first conductive substrate, color-changing material layer and second conductive substrate are sequentially laminated arrangement.The technical scheme provided in the embodiment of the present application realizes that the light intensity after filtering is adjusted according to the corresponding voltage applied to electrochromic device without replacing filter, reduces the expenditure cost of user and the loss of mechanical structure of equipment needing to be filtered, simultaneously also realizes the protection of electrochromic layer, also more convenient to fix the light filter device on the equipment needing to be filtered, strengthens the structural stability of light filter device.

Description

Technical Field

[0001] The present invention relates to the field of optical technology, and in particular to a filter device, a camera and a light source. Background Technology

[0002] With the development of various display technologies, optical filters are becoming increasingly inseparable from our lives. They have wide applications in fields such as medical, automotive, business offices, and optical communications. In particular, they are widely used in current imaging systems such as security cameras, cameras, and mobile terminal cameras to partially or completely block certain colors of light.

[0003] Current filters are typically made by adding specific colored dyes to plastic or glass sheets. As a result, the color and transmittance of the filter are fixed. However, ambient light is constantly changing, and different users have different needs and preferences for light. This means that when users' needs for light change during use, they need to manually replace different filters. This not only increases the inconvenience and cost for users, but also makes the mechanical structure of the equipment prone to premature damage due to the frequent replacement of filters. Summary of the Invention

[0004] This invention provides a light filtering device, a camera, and a light source to adjust the intensity of filtered light as needed without replacing the filter.

[0005] In a first aspect, embodiments of the present invention provide a light filtering device, comprising: an electrochromic device; the electrochromic device comprising an electrochromic layer, a first superimposed layer and a first substrate stacked thereon; wherein the electrochromic layer comprises: a first conductive substrate, a color-changing material layer and a second conductive substrate stacked thereon in sequence.

[0006] Optionally, the electrochromic device further includes a second superimposed layer and a second substrate disposed on the surface of the electrochromic layer away from the first superimposed layer.

[0007] Optionally, the surface on the first substrate away from the first stacked layer is curved.

[0008] Optionally, the electrochromic layer includes a plurality of electrochromic regions laid out in a flat manner, and the filtering device adjusts the transmittance of each electrochromic region respectively; the color-changing material layer of the plurality of electrochromic regions includes at least two materials.

[0009] Optionally, the filtering device further includes: a first electrode and a second electrode; wherein the first electrode is connected to the first conductive substrate, the number of the second electrodes corresponds to the number of the electrochromic regions, and each is connected to a second conductive substrate corresponding to each electrochromic region, and the first electrode and the second electrode are used to adjust the transmittance of each electrochromic region respectively.

[0010] Optionally, there may be multiple electrochromic layers, which are stacked sequentially; wherein the multiple electrochromic layers are connected by a superposition layer or by a common conductive substrate sharing adjacent positions.

[0011] Optionally, the number of electrochromic devices is multiple, and the multiple electrochromic devices are spaced apart by a preset distance.

[0012] Optionally, the filtering device further includes: at least one moving module, the moving module being configured corresponding to the electrochromic device, for moving the electrochromic device corresponding to each moving module into or out of the optical path structure of the filtering device.

[0013] Secondly, embodiments of the present invention also provide a camera, including a camera module and any of the above-mentioned filtering devices, wherein the camera module includes an image sensor, the filtering device is located in the optical path of the incident light of the camera module, and the first substrate is located on the side close to the image sensor.

[0014] Thirdly, embodiments of the present invention also provide a light source, including a light-emitting module and any of the above-mentioned filtering devices, wherein the filtering device is located in the optical path of the light emitted by the light-emitting module, and the first substrate is located on the side away from the light-emitting module.

[0015] This invention provides a light filtering device that replaces traditional filters with an electrochromic device. This allows for adjustment of the filtered light intensity by applying a corresponding voltage to the electrochromic device without replacing the original filter, improving ease of use and reducing user costs and wear on the mechanical structure of the equipment requiring filtering. Furthermore, by providing a first substrate on one side of the electrochromic layer of the electrochromic device and connecting it via a first overlay layer, the electrochromic layer is protected, and the device is easier to fix to the equipment requiring filtering, thus enhancing its structural stability. Attached Figure Description

[0016] Figure 1 This is a structural block diagram of a filtering device provided in Embodiment 1 of the present invention;

[0017] Figure 2This is a structural block diagram of an electrochromic layer provided in Embodiment 1 of the present invention;

[0018] Figure 3 This is a structural block diagram of another filtering device provided in Embodiment 1 of the present invention;

[0019] Figure 4 This is a structural block diagram of the filtering device provided in Embodiment 2 of the present invention;

[0020] Figure 5 This is a top view of an electrochromic layer including multiple electrochromic regions provided in Embodiment 3 of the present invention;

[0021] Figure 6 This is a top view of another electrochromic layer including multiple electrochromic regions provided in Embodiment 3 of the present invention;

[0022] Figure 7 This is a top view of another electrochromic layer including multiple electrochromic regions provided in Embodiment 3 of the present invention;

[0023] Figure 8 This is a schematic diagram of the segmentation scheme of the electrochromic layer provided in Embodiment 3 of the present invention;

[0024] Figure 9 This is a schematic diagram of another segmentation scheme for the electrochromic layer provided in Embodiment 3 of the present invention;

[0025] Figure 10 This is a schematic diagram of another segmentation scheme for the electrochromic layer provided in Embodiment 3 of the present invention;

[0026] Figure 11 This is a schematic diagram of the control circuit provided in Embodiment 3 of the present invention;

[0027] Figure 12 This is a schematic diagram of the connection scheme of multiple electrochromic layers provided in Embodiment 4 of the present invention;

[0028] Figure 13 This is a schematic diagram of another connection scheme for multiple electrochromic layers provided in Embodiment 4 of the present invention;

[0029] Figure 14 This is a schematic diagram of the control circuit provided in Embodiment 4 of the present invention;

[0030] Figure 15 This is a structural block diagram of a filter device including multiple electrochromic devices provided in Embodiment 5 of the present invention;

[0031] Figure 16 This is a schematic diagram of the control circuit provided in Embodiment 5 of the present invention;

[0032] Figure 17 This is a structural block diagram of a filter device including a moving module provided in Embodiment 5 of the present invention;

[0033] Figure 18 This is a structural block diagram of the camera provided in Embodiment Six of the present invention;

[0034] Figure 19 This is a structural block diagram of the light-emitting light source provided in Embodiment 7 of the present invention. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the invention and not all structures. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. In the description of the invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise expressly specified.

[0037] Furthermore, the terms "first," "second," etc., may be used herein to describe various directions, actions, steps, or elements, but these directions, actions, steps, or elements are not limited by these terms. These terms are used only to distinguish one direction, action, step, or element from another. The terms "first," "second," etc., should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0038] Example 1

[0039] Embodiment 1 of the present invention provides a light filtering device, which includes: an electrochromic device; such as Figure 1As shown, the electrochromic device includes a stacked electrochromic layer 10, a first superimposed layer 20, and a first substrate 30; wherein, the electrochromic layer 10 includes: a first conductive substrate, a color-changing material layer, and a second conductive substrate stacked sequentially. The color-changing material layer is a sheet with adjustable transmittance composed of one or more liquid or solid materials, such as polymer-dispersed liquid crystal (PDLC) glass, suspended particle device (SPD), and electrochromic (EC) types.

[0040] Specifically, electrochromic properties (reflectivity, transmittance, absorptivity, etc.) of a material undergo stable and reversible color changes under the influence of an external electric field. This manifests as reversible changes in color and transmittance. Materials with electrochromic properties are called electrochromic materials, and electrochromic devices are devices made of electrochromic materials.

[0041] The electrochromic device includes an electrochromic layer 10, a first superimposed layer 20, and a first substrate 30. The electrochromic layer 10 is the part of the electrochromic device specifically used for electrochromic changes. In this embodiment, the first superimposed layer 20 is an optically transparent adhesive, which can be formed into a film or a frame, etc., and can specifically be OCA (Optically Clear Adhesive), OCF (Optical Clear Film), PVB (Polyvinyl Butyral Film), or EVA (Polyethylene Vinylacetate). Film, etc., are used to bond the electrochromic layer 10 to the two adjacent surfaces of the first substrate 30, thereby fixing the electrochromic layer 10 onto the first substrate 30. The first substrate 30 is a transparent material, specifically plexiglass or transparent plastic, etc. Optionally, the thickness of the first substrate 30 is greater than or equal to 0.1 mm. On the one hand, it can protect the electrochromic layer 10 from external wear while minimizing the impact on the transmittance of the electrochromic device. On the other hand, since the electrochromic layer 10 is very thin, it is easy to bend. The first substrate 30 can play a good fixing role to reduce the impact of bending of the electrochromic layer 10 on the light filtering process.

[0042] In some alternative embodiments of this embodiment, the first superimposed layer 20 is a mechanical structure that can associate the electrochromic layer 10 with the first substrate 30, such as an edge plate, a snap fastener, etc.; in other alternative embodiments of this embodiment, the first superimposed layer 20 includes a connecting portion and an air gap, a portion of the area between the first substrate 30 and the electrochromic layer 10 is separated by the air gap, and the remaining portion is connected by the connecting portion (adhesive layer or mechanical structure).

[0043] Furthermore, the electrochromic layer 10 includes: a first conductive substrate, a color-changing material layer, and a second conductive substrate sequentially stacked. For example, as shown... Figure 2 As shown, an electrochromic layer structure of an EC is given. The first conductive substrate includes a first sub-substrate 101 and a first transparent conductive layer 102. The color-changing material layer includes an ion storage layer 103, an electrolyte layer 104 and an electrochromic material layer 105. The second conductive substrate includes a second transparent conductive layer 106 and a second sub-substrate 107.

[0044] The first sub-substrate 101 and the second sub-substrate 107 are optically transparent materials with a transmittance greater than 90%. Specifically, they can be glass or flexible substrate materials. Flexible substrate materials include PET (Polyester Film), cyclic olefin copolymers, or cellulose triacetate, to minimize the impact on transmittance. The thickness of the flexible substrate material can be 20-500 μm, for example, 20 μm, 50 μm, 100 μm, 150 μm, 200 μm, 250 μm, 300 μm, 350 μm, 400 μm, 450 μm, or 500 μm, but is not limited to the listed values; other unlisted values ​​within the range are also applicable. When the substrate material is glass, the thickness of the substrate layer is not strictly limited; those skilled in the art can make a reasonable selection based on the actual application.

[0045] The first transparent conductive layer 102 is deposited on the first sub-substrate 101, and the second transparent conductive layer 106 is deposited on the second sub-substrate 107. The first transparent conductive layer 102 and the second transparent conductive layer 106 can be made of materials such as indium-tin oxide (ITO), aluminum zinc oxide (AZO), fluorine-doped tin oxide (FTO), silver nanowires, graphene, carbon nanotubes, metal meshes, or silver nanoparticles. By utilizing their conductive properties, they provide a corresponding electric field for the electrochromic material layer 105 and the ion storage layer 103.

[0046] An electrochromic material layer 105 is covered on the second transparent conductive layer 106. The specific material can be selected according to the color requirements, and the thickness can be 1 nanometer to 10 micrometers. The electrochromic material layer 105 changes under the action of an electric field, thereby changing the color and / or transmittance of the electrochromic material layer 105.

[0047] The electrolyte layer 104 is a transparent electron transfer material, which can be various transparent liquid electrolytes, gel electrolytes or solid electrolytes, etc., and its thickness can be 1-100 micrometers. It is used to provide ion transport channels between the electrochromic material layers 105.

[0048] An ion storage layer 103 covers the first transparent conductive layer 102 and is one or a combination of at least two oxides or complexes formed from metal elements of Groups IIIB, IVB, VB, VIB, VIIB, VIII, IB, and IIB that can store ions during electrochemical reactions. For example, it can be a single metal oxide, or a combination of two or more metal oxides, or a metal complex, or a combination of two or more metal complexes, or a combination of a metal complex and a metal oxide. The thickness can be 1 nanometer to 10 micrometers, and it is used for storing ions and balancing charges.

[0049] For example, the specific process of electrochromism is as follows: when a positive voltage is applied between the first transparent conductive layer 102 and the second transparent conductive layer 106, the ion storage layer 103 releases ions, which are then transported to the vicinity of the electrochromic material layer 105 through the electrolyte layer 104. At the same time, the electrochromic material layer 105 loses electrons and undergoes an oxidation reaction, causing changes in the spectral transmittance, reflectance, and absorptance of the electrochromic material layer. When a reverse voltage is applied between the first transparent conductive layer 102 and the second transparent conductive layer 106, the ions in the electrochromic material layer 105 return to the ion storage layer 103 through the electrolyte layer 104. The electrochromic material layer 105 gains electrons and undergoes a reduction reaction, thereby restoring the spectral transmittance, reflectance, and absorptance of the electrochromic material layer 105. In other words, electrochromism is a reversible reaction. For different electrochromic materials, those skilled in the art can select a suitable voltage direction (forward or reverse) to change the transmittance of the electrochromic layer, depending on whether it is an anodic or cathodic electrochromic material. Examples will not be elaborated here.

[0050] The required applied voltage can be determined based on the user's requirements for light transmittance and the electrochemical properties of the specific material used in the electrochromic material layer 105. Different materials of the electrochromic material layer 105 can achieve color changes within different color ranges, and the required applied voltage will also vary. For example, the voltage required for a complete color change of the blue electrochromic material layer 105 can be 0.8-1.2V, and the voltage required for a complete color change of the black electrochromic material layer 105 can be 1.0-1.6V, etc.

[0051] The filtering device provided in this embodiment of the invention uses an electrochromic device instead of a traditional filter, enabling adjustment of the filtered light intensity by applying a corresponding voltage to the electrochromic device as needed without replacing the filter. This improves the ease of use of the filtering device, reduces user costs, and minimizes wear and tear on the mechanical structure of the equipment requiring filtering. Furthermore, by providing a first substrate 30 on one side of the electrochromic layer 10 of the electrochromic device and connecting it via a first superposition layer 20, protection of the electrochromic layer 10 is achieved, and it is easier to fix the filtering device to the equipment requiring filtering, thus enhancing the structural stability of the filtering device.

[0052] In some alternative embodiments of this example, the first substrate 30 is in direct contact with the first conductive substrate of the electrochromic layer 10, and the first superimposed layer is superimposed on one side of the second conductive substrate of the electrochromic layer 10. For example, the first substrate 30 is a transparent material with a certain rigidity, such as glass; the first and second conductive substrates are materials such as ITO, AZO, FTO, silver nanowires, graphene, carbon nanotubes, metal meshes, or silver nanoparticles; and the first superimposed layer is a transparent material with a certain rigidity, such as glass.

[0053] Based on the above technical solutions, alternatives include, for example... Figure 3 As shown, the electrochromic device also includes a second superimposed layer 40 and a second substrate 50 stacked on the surface of the electrochromic layer 10 away from the first superimposed layer 20.

[0054] Specifically, the second overlay layer 40 can be an optically transparent adhesive, specifically the same material as the first overlay layer 20, used to bond the electrochromic layer 10 to the two adjacent surfaces of the second substrate 50, thereby fixing the electrochromic layer 10 onto the second substrate 50. The second substrate 50 is a transparent material, specifically the same material as the first substrate 30, and its thickness is also greater than or equal to 0.1 mm, thereby providing better protection for the electrochromic layer 10 while minimizing the impact on the transmittance of the electrochromic device. In some alternative embodiments, the second overlay layer 40 is a mechanical structure capable of associating the electrochromic layer 10 with the second substrate, such as an edge clamp, a snap-fit, etc. In other alternative embodiments, the second overlay layer 40 includes a connecting portion and an air gap, with a portion of the area between the second substrate and the electrochromic layer 10 separated by the air gap, and the remaining portion connected by the connecting portion (adhesive layer or mechanical structure).

[0055] Example 2

[0056] Embodiment 2 of the present invention provides a filtering device. The technical solution of this embodiment is a further refinement based on the technical solutions of the above embodiments; optionally, such as... Figure 4 As shown, the surface of the first substrate 30 that is away from the first stacked layer 20 is curved. Figure 4 An example of optimization based on a filter device including a second overlay layer 40 and a second substrate 50 is shown.

[0057] Specifically, when using the filtering device provided in this embodiment, light can be incident from the second substrate 50 and emitted from the first substrate 30 after filtering. The first substrate 30 includes two surfaces, one near and one far from the first stacked layer 20, so the light is emitted specifically from the surface of the first substrate 30 far from the first stacked layer 20. When the surface of the first substrate 30 far from the first stacked layer 20 is curved, the light can be further converged or diverged. At the same time, the surface of the first substrate 30 near the first stacked layer 20 can be flat to improve the stability of the connection with the electrochromic layer 10. For example, when the surface of the first substrate 30 far from the first stacked layer 20 is convex, the filtered light can be converged. The concavity and convexity of the surface and the curvature at various positions on the surface can be set according to the needs of specific applications.

[0058] The filtering device provided in this embodiment of the invention, by setting the surface of the first substrate 30 away from the first superposition layer 20 as a curved surface, realizes the aggregation of filtered light, thereby enabling better reception of filtered light by some devices with small light receiving areas, and enhancing the applicability of the filtering device.

[0059] Example 3

[0060] Embodiment 3 of the present invention provides a light filtering device. The technical solution of this embodiment is further refined based on the technical solutions of the above embodiments. Optionally, the electrochromic layer 10 includes multiple electrochromic regions laid out in a flat manner, and the light filtering device adjusts the transmittance of each electrochromic region respectively; the color-changing material layer of the multiple electrochromic regions includes at least two materials.

[0061] Specifically, the cross-section of the electrochromic layer 10 can be of any shape. All electrochromic regions on the electrochromic layer 10 can either fill the entire electrochromic layer 10 or occupy only a portion of it. Furthermore, multiple electrochromic regions can be arranged adjacently or non-adjacently. When all electrochromic regions occupy only a portion of the electrochromic layer 10, a structure that can alter the light path, such as a compound eye lens, can be placed on the side of the light-incident surface of the filter device (e.g., the side of the second substrate 50 away from the second stacked layer 40), thereby accurately directing the incident light onto each electrochromic region. For areas on the electrochromic layer 10 other than the electrochromic regions, the materials used in the first stacked layer 20 and / or the second stacked layer 40 can be used to fill the area, completely encapsulating the electrochromic layer 10 and providing better protection. Furthermore, black ink or similar substances can be added to the first overlay layer 20 and / or the second overlay layer 40 corresponding to areas outside the electrochromic regions to avoid light interference in these areas and better define the light-transmitting areas.

[0062] For example, Figure 5 , Figure 6 and Figure 7 These are top views of three electrochromic layers 10, each containing multiple electrochromic regions, as shown below. Figure 5 As shown, the cross-section of the electrochromic layer 10 can be rectangular, and the electrochromic layer 10 can be simply divided into three electrochromic regions; as... Figure 6 As shown, the cross-section of the electrochromic layer 10 can also be circular, and then the electrochromic layer 10 can be divided into three electrochromic regions in a concentric circle manner; as shown Figure 7 As shown, any three non-adjacent electrochromic regions can also be determined in the electrochromic layer 10.

[0063] In the longitudinal section direction of the electrochromic layer 10, with Figure 5 Taking the corresponding electrochromic region as an example, when dividing the electrochromic layer 10, the following options are available: Figure 8As shown, only the electrochromic material layer 105 and the second transparent conductive layer 106 of the electrochromic layer 10 can be divided, while the other parts of the electrochromic layer 10 are shared by each electrochromic region. Specifically, the second transparent conductive layer 106, disposed on the second sub-substrate 107, corresponding to the electrochromic region, can be laser-cut. Then, the electrochromic material layer 105 corresponding to each electrochromic region is laminated onto the cut second transparent conductive layer 106, and then stacked sequentially with the other parts. Figure 9 and Figure 10 As shown, the electrochromic material layer 105, the second transparent conductive layer 106, and the second sub-substrate 107 of the electrochromic layer 10 can also be divided, and the other parts of the electrochromic layer 10 can be shared by each electrochromic region, or the electrochromic layer 10 can be completely divided, thereby eliminating the laser cutting process and making the preparation process of the electrochromic material layer 105 more convenient.

[0064] Different electrochromic materials can be used in each electrochromic region, and the filter device can adjust the transmittance of each electrochromic region separately to enable each electrochromic region to change color simultaneously within different color ranges. Optionally, the number of electrochromic regions can be two, three, or four, etc., and the specific electrochromic materials and quantity of each electrochromic region can be determined according to the needs of the application scenario.

[0065] Based on the above technical solution, by setting the surface of the first substrate 30 away from the first superposition layer 20 as a curved surface, it is possible to aggregate light of different colors obtained after filtering to obtain any color within a larger color range. Alternatively, based on the principle of the three primary colors, different color-changing materials can be selected for the color-changing material layers of different electrochromic regions. Different color-changing materials correspond to different tinting colors. The tinting colors of the electrochromic regions can be set to combinations such as (red, green, blue), (red, green, blue, blue), (red, red, green, blue), or (red, green, green, blue). By controlling the voltage of each electrochromic region and adjusting the transmittance of each region, the LAB value of the color in each region changes. Then, the curved surface of the first substrate 30 aggregates light with different LAB values ​​to obtain light of any color.

[0066] The filtering device provided in this embodiment of the invention achieves color changes in different regions within different color ranges by laying multiple electrochromic regions flat on the electrochromic layer 10 and controlling the transmittance of each region. Furthermore, by setting the surface of the first substrate 30 away from the first stacked layer 20 as a curved surface and using at least two materials for the color-changing material layers of the multiple electrochromic regions, the light filtered by the multiple electrochromic regions is aggregated to obtain light of any desired color.

[0067] Based on the above technical solution, optionally, the filtering device further includes: a first electrode and a second electrode; wherein, the first electrode is connected to a first conductive substrate, the number of second electrodes corresponds to the number of electrochromic regions, and each is connected to a second conductive substrate corresponding to each electrochromic region, and the first electrode and the second electrode are used to adjust the transmittance of each electrochromic region respectively.

[0068] Specifically, electrochromic materials can be divided into anodic coloring materials and cathodic coloring materials. The positive and negative polarity relationship between the first and second electrodes can be set according to the needs of the electrochromic material. By connecting each second electrode to the second conductive substrate corresponding to each electrochromic region, and making each electrochromic region share the first electrode connected to the first conductive substrate, each electrochromic region can change color under the action of the voltage between the first electrode and each second electrode, thereby realizing the transmittance change of each electrochromic region.

[0069] Optionally, if the electrochromic layer 10 is completely divided, the number of first electrodes can also correspond to the number of electrochromic regions, and each electrode can be connected to the first conductive substrate corresponding to each electrochromic region, so as to control the transmittance change of each completely divided electrochromic region.

[0070] Based on the above technical solution, optionally, the filtering device also includes a control circuit; a schematic diagram of the control circuit is shown below. Figure 11 As shown, the control circuit includes a power supply module 701, a controller 702, and a drive module 703. The power supply module 701 provides the necessary power to the controller 702 and the drive circuit. When the controller 702 receives a signal indicating that the transmittance of the electrochromic layer 10 needs adjustment, it outputs a voltage signal and sends it to the drive module 703. The drive module 703 then amplifies the voltage signal according to the target transmittance to output a corresponding control voltage. Specifically, the drive module 703 can also output individual control voltages for each electrochromic region (e.g., ...). Figure 11 The control voltage required for the first electrochromic region, the second electrochromic region, and the third electrochromic region in the process.

[0071] Example 4

[0072] Embodiment 4 of the present invention provides a light filtering device. The technical solution of this embodiment is further refined based on the technical solution of the above embodiments. Optionally, there are multiple electrochromic layers 10, which are stacked sequentially; wherein, the multiple electrochromic layers 10 are connected by a superposition layer or by a common conductive substrate sharing adjacent positions.

[0073] Specifically, each electrochromic layer 10 can use different electrochromic materials, and the filter device can also adjust the transmittance of each electrochromic layer 10 separately through electrodes disposed on each electrochromic layer 10, so that each electrochromic layer 10 can change color simultaneously within different color ranges. Optionally, the number of electrochromic layers 10 can be two, three, or four, and the specific electrochromic materials and number of each electrochromic layer 10 can be determined according to the needs of the application scenario.

[0074] like Figure 12 As shown, multiple electrochromic layers 10 can be connected by a stacking layer 108. The stacking layer 108 can be made of the same material as the first stacking layer 20, thereby fixing the multiple electrochromic layers 10 together. Figure 13 As shown, multiple electrochromic layers 10 can also be connected by sharing a common conductive substrate at adjacent locations, wherein the common conductive substrate can be a double-sided ITO substrate, such as... Figure 13 The example ITO102-sub-substrate 109-ITO106, specifically, the double-sided ITO substrate may include a substrate layer and conductive layers sequentially disposed on both sides of the substrate layer. Preferably, an optical adjustment layer is added, and the thickness of the conductive layers is between 1-1000 nanometers. When connected via the common sub-substrate 109, the original first sub-substrate 101 and / or second sub-substrate 107 of the two electrochromic layers 10 at the connection location will be replaced by the common sub-substrate 109.

[0075] The filtering device provided in this embodiment of the invention sets the number of electrochromic layers 10 to multiple and stacks them sequentially through a superposition layer 108 or a common conductive substrate. It can also control the transmittance of multiple electrochromic layers 10, so that different electrochromic layers 10 can change color in different color ranges. Furthermore, the stacking of electrochromic layers 10 allows incident light to be filtered multiple times to directly obtain light of any desired color.

[0076] Based on the above technical solution, optionally, the filtering device also includes a control circuit; a schematic diagram of the control circuit is shown below. Figure 14As shown, the control circuit includes a power supply module 701, a controller 702, and a drive module 703. The power supply module 701 provides the necessary power to the controller 702 and the drive circuit. When the controller 702 receives a signal indicating that the transmittance of the electrochromic layer 10 needs adjustment, it outputs a voltage signal and sends it to the drive module 703. The drive module 703 then amplifies the voltage signal according to the target transmittance to output a corresponding control voltage. Specifically, the drive module 703 can also output individual control voltages for each electrochromic layer 10 (e.g., ...). Figure 14 The control voltage required for the first, second, and third electrochromic layers in the process.

[0077] Example 5

[0078] Embodiment 5 of the present invention provides a filtering device. The technical solution of this embodiment is a further refinement based on the technical solutions of the above embodiments; optionally, as shown below... Figure 15 As shown, there are multiple electrochromic devices, and the multiple electrochromic devices are set at a preset distance from each other.

[0079] Specifically, different electrochromic materials can be used for each electrochromic device, and the filter device can also adjust the transmittance of each electrochromic device individually by setting electrodes on each device, so that each electrochromic device can change color simultaneously within different color ranges. Optionally, the number of electrochromic devices can be two, three, or four, and the specific electrochromic material and quantity of each device can be determined according to the needs of the application scenario.

[0080] The preset distance can be set according to the size of the filter device and the needs of the application scenario. Optionally, the preset distance can be a distance that allows multiple electrochromic devices to slide easily without affecting each other, so as to facilitate the removal of a particular electrochromic device.

[0081] Optionally, multiple electrochromic devices in the optical path structure of the filter device can be fixed by fasteners to keep the position of the electrochromic devices in the optical path structure unchanged, so as to avoid the influence of the electrochromic devices tilting or falling on the filtering process.

[0082] The filtering device provided in this embodiment of the invention sets the number of electrochromic devices to multiple and sets them apart by a preset distance. It can also control the transmittance of multiple electrochromic devices, so that different electrochromic devices can change color in different color ranges. Furthermore, by stacking the electrochromic devices, the incident light can be filtered multiple times to directly obtain the light of any desired color.

[0083] Based on the above technical solution, optionally, the filtering device also includes a control circuit; a schematic diagram of the control circuit is shown below. Figure 16 As shown, the control circuit includes a power supply module 701, a controller 702, and a drive module 703. The power supply module 701 provides the necessary power to the controller 702 and the drive circuit. When the controller 702 receives a signal indicating that the transmittance of the electrochromic device needs adjustment, it outputs a voltage signal and sends it to the drive module 703. The drive module 703 then amplifies the voltage signal according to the target transmittance to output a corresponding control voltage. Specifically, the drive module 703 can also output individual control voltages for each electrochromic device (e.g., ...). Figure 16 The control voltage required for the first, second, and third electrochromic devices in the system.

[0084] Based on the above technical solutions, alternatives include, for example... Figure 17 As shown, the filtering device further includes at least one moving module 60, which is configured to move the electrochromic device corresponding to each moving module 60 into or out of the optical path structure of the filtering device.

[0085] Optionally, the number of moving modules 60 corresponds to the number of electrochromic devices. Specifically, each moving module 60 corresponds one-to-one with an electrochromic device and can be connected to the corresponding electrochromic device. When a particular electrochromic device is not needed for the current filtering requirements, it can be removed from the optical path structure of the filtering device using the corresponding moving module 60. Optionally, the removal process completely removes the unnecessary electrochromic device from the optical path structure of the filtering device to avoid affecting the filtering process. When the removed electrochromic device needs to be moved again, it can be moved back into the optical path structure of the filtering device using the corresponding moving module 60. Even when the transmittance is adjusted to the maximum, electrochromic devices still cause light loss. Therefore, by setting up moving modules 60 to move the electrochromic devices in or out, the impact of the filtering device on transmittance can be reduced while meeting the color filtering requirements.

[0086] Optionally, in some alternative embodiments, the number of moving modules 60 is less than the number of electrochromic devices. Electrochromic devices with corresponding moving modules 60 can be moved into or out of the optical path structure of the filter device according to actual scenario requirements; electrochromic devices without corresponding moving modules 60 are fixed and cannot be moved. By using moving modules 60 to move some electrochromic devices in or out, the impact of the filter device on transmittance can be reduced while still meeting the color requirements of the filter.

[0087] Example 6

[0088] Embodiment 6 of the present invention provides a camera, including a camera module and any of the filtering devices described in the above embodiments. The camera module includes an image sensor, the filtering device is located in the optical path of the incident light from the camera module, and the first substrate is located on the side closer to the image sensor. In this embodiment, as... Figure 18 As shown, the camera includes a light filter device 1 and a camera module. The camera module includes a lens 2 and an image sensor 3. The light filter device 1 can be located at the light-incident end of the lens 2, inside the lens 2, or between the lens 2 and the image sensor 3. It is used to filter the light incident on the image sensor 3 according to user needs. The image sensor 3 is located at the light-outceasing end of the lens 2 and is used to capture the image captured by the lens 2. The lens 2 can be a lens from a surveillance camera, a mobile terminal camera, an auxiliary camera / black and white / telephoto / wide-angle camera in a multi-camera module, a periscope camera, or a biometric camera.

[0089] Specifically, when the camera is not used for taking pictures, the transmittance of the filter device 1 can be adjusted to the lowest level to hide the lens assembly on the housing; when the camera is activated to take pictures and no filter effect is needed, the transmittance of the filter device 1 can be adjusted to the highest level to allow light to pass through; when a filter effect is needed, the transmittance of each electrochromic region in the electrochromic layer of the filter device 1 can be adjusted to a preset transmittance according to the desired filter color, or the transmittance of each electrochromic layer in the filter device 1 can be adjusted to a preset transmittance, etc., and then the first substrate aggregates or superimposes different colors of light to achieve the effect of filtering any color of light, thereby realizing a variety of filter effects. Meanwhile, a table relating transmittance to open-circuit voltage (OCV) for different filter colors can be pre-stored in the processor. When the filter color needs to be adjusted, the transmittance to OCV corresponding to the filter color is looked up in the table, thereby adjusting the transmittance of the electrochromic layer and / or electrochromic region of the filter device 1 to achieve the adjustment of the filter color. When the ambient light is too strong, the transmittance of the filter device 1 can also be adjusted to a suitable transmittance so that the image is not overexposed.

[0090] Example 7

[0091] Embodiment 7 of the present invention provides a light-emitting source, including a light-emitting module and any of the filtering devices in the above embodiments. The filtering device is located in the optical path of the emitted light from the light-emitting module, and the first substrate is located on the side away from the light-emitting module. In this embodiment, as... Figure 19As shown, the light source includes a filter device 4 and a light-emitting module 5. The filter device 4 can be disposed at the light-emitting end of the light-emitting module 5, and is used to filter the light emitted by the light-emitting module 5 according to user needs.

[0092] Specifically, when the light source is not activated, the transmittance of the filter device 4 can be adjusted to the lowest level to hide the light source window on the electronic device casing. When the light source is activated but the filtering effect is not needed, the transmittance of the filter device 4 can be adjusted to the highest level, allowing light to pass through. When a filtering effect is needed, the transmittance of each electrochromic region in the electrochromic layer of the filter device 4 can be adjusted to a preset transmittance, or the transmittance of each electrochromic layer in the filter device 4 can be adjusted to a preset transmittance, etc., according to the desired light source color. Through the aggregation or superposition of different colored light by the first substrate, a filtering effect can be achieved, thereby realizing a rich and varied light source color effect, and achieving the effects of adjusting the warm or cool effect of the light source, adjusting the light source color according to the ambient color, etc. At the same time, a table of transmittance / OCV corresponding to different filter colors can be pre-stored in the processor. When the filter color needs to be adjusted, the transmittance / OCV corresponding to the filter color is looked up in the table, thereby adjusting the transmittance of the filter device 4 to achieve the adjustment of the filter color.

[0093] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A light filtering device, characterized in that The application relates to an electrochromic device. The electrochromic device comprises an electrochromic layer, a first superimposed layer and a first substrate which are arranged in a stack; wherein the electrochromic layer comprises a first conductive substrate, an electrochromic material layer and a second conductive substrate which are arranged in a stack. The electrochromic layer comprises a plurality of electrochromic regions arranged in a tile manner, and the light filtering device adjusts the transmittance of each electrochromic region; the electrochromic material layer of the plurality of electrochromic regions comprises at least two materials. The surface of the first substrate away from the first superimposed layer is a curved surface. The curved surface of the first substrate aggregates light rays with different LAB values of the plurality of electrochromic regions, thereby obtaining light rays with any color. The electrochromic device further comprises a second superimposed layer and a second substrate which are arranged in a stack on the surface of the electrochromic layer away from the first superimposed layer.

2. The light filtering device of claim 1, wherein, The light filtering device further comprises a first electrode and a second electrode; wherein the first electrode is connected with the first conductive substrate, the number of the second electrodes corresponds to the number of the electrochromic regions, and each second electrode is connected with the second conductive substrate corresponding to each electrochromic region; the first electrode and the second electrode are used for adjusting the transmittance of each electrochromic region.

3. The light filtering device of claim 1, wherein, The number of the electrochromic layers is multiple, and the electrochromic layers are arranged in a stack; wherein the electrochromic layers are connected through superimposed layers or common conductive substrates in adjacent positions.

4. The filter device according to claim 1 or 2, characterized in that The number of the electrochromic devices is multiple, and the electrochromic devices are arranged at a preset distance.

5. The filter device according to claim 1 or 2, characterized in that The light filtering device further comprises at least one moving module which is arranged corresponding to the electrochromic device and is used for moving the electrochromic device corresponding to each moving module into or out of the light path structure of the light filtering device.

6. The light filtering device of claim 5, wherein, The application relates to a camera module and a light filtering device as claimed in any one of claims 1-6, wherein the camera module comprises an image sensor, the light filtering device is located on the light path of incident light of the camera module, and the first substrate is located on the side close to the image sensor.

7. A camera, characterized by The application relates to a light emitting module and a light filtering device as claimed in any one of claims 1-6, wherein the light filtering device is located on the light path of emitted light of the light emitting module, and the first substrate is located on the side away from the light emitting module.

8. A light emitting light source, characterized in that ​

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