CN115485532A

CN115485532A - Color temperature sensor and electronic device

Info

Publication number: CN115485532A
Application number: CN202180010376.9A
Authority: CN
Inventors: 李国维; 杨晖; 邢志浩
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2022-12-16
Also published as: WO2022205206A1

Abstract

The application discloses color temperature sensor and electronic equipment, wherein the color temperature sensor comprises a multispectral sensor, a light scattering film layer, a light incidence window control part and a control circuit, when the color temperature information in the environment needs to be sensed, the light in the environment can firstly irradiate the light incidence window control part, and each incidence light control unit in the light incidence window control part can be in a light transmitting state or a light shading state under the control of the control circuit. When light in a specific visual angle range needs to be detected, the control circuit controls the incident light control unit at the position corresponding to the specific visual angle range to be in a light transmitting state and the other positions to be in a light shading state, so that only the light in the specific visual angle range enters the light scattering film layer through the incident window control part and irradiates the multi-spectral sensor through the scattering effect of the light scattering film layer, the color temperature sensor can collect the light from different visual angles in a targeted manner, and the color temperature sensor has the capability of detecting the color temperature information of the light in the specific visual angle range.

Description

Color temperature sensor and electronic device

Technical Field

The application relates to the technical field of light detection, in particular to a color temperature sensor and electronic equipment.

Background

With the increasing demand of consumers for the quality of images photographed by photographing and recording devices, the color restoration and color display effects of images are receiving more and more attention from consumers and equipment manufacturers. The color temperature sensor has the capability of detecting spatial multi-channel spectral information and can help the imaging equipment to sense illumination information such as color temperature of the environment, and therefore color restoration and color display are carried out through the auxiliary algorithm link.

For the current color temperature sensor, when the current color temperature sensor works, only average color temperature information in one visual field range can be observed generally, and the current color temperature sensor does not have the capability of spatial resolution, so that for scenes with local change of spatial color temperature, such as night scenes or scenes with mixed light sources in a market, the detected color temperature information cannot represent the spatial distribution of the light sources, and therefore, the current color temperature sensor cannot effectively help equipment to perform operations such as local color effect improvement.

Disclosure of Invention

The application provides a color temperature sensor and electronic equipment for provide a color temperature sensor who possesses the spatial resolution ability of color temperature information.

In a first aspect, the present application provides a color temperature sensor, comprising: multispectral sensor, light scattering film layer, light incidence window control unit and control circuit. The light scattering film layer is arranged on the light incident side of the multispectral sensor and can scatter incident light from different spatial positions, so that part of scattered light can be received by the multispectral sensor, and received optical signals of different wave bands are converted into electric signals by the multispectral sensor. The light scattering film layer may be formed of a transparent material, such as frosted ground glass or a transparent plastic having a rough surface, and is not limited herein. The light incidence window control part is arranged on one side, away from the multispectral sensor, of the light scattering film layer and comprises a plurality of incidence light control units, the control circuit is electrically connected with the plurality of incidence light control units respectively, and voltage is applied to the incidence light control units through the control circuit, so that each incidence light control unit is in a light transmitting state or a light shading state when different voltages are applied to the incidence light control units.

The color temperature sensor is equivalent to a light incident window control part with a controllable incident light window, which is additionally arranged on the light incident side of the traditional color temperature sensor, when the color temperature information in the environment needs to be sensed, the color temperature sensor is right opposite to the environment needing to be sensed, light from the environment can firstly irradiate the light incident window control part, and each incident light control unit in the light incident window control part can be in a light transmitting state or a light shading state under the control of the control circuit. When light in a specific visual angle range needs to be detected, the control circuit controls the incident light control unit at the position corresponding to the specific visual angle range to be in a light transmitting state, and the incident light control units at other positions to be in a light shading state, so that only the light in the specific visual angle range enters the light scattering film layer through the incident window control part and irradiates the multi-spectral sensor through the scattering effect of the light scattering film layer, the color temperature sensor can collect the light from different visual angles in a targeted manner, and the color temperature sensor has the capability of detecting the color temperature information of the light in the specific visual angle range.

In a specific implementation, each incident light control unit in the light incident window control portion can be independently controlled by the control circuit, so that the incident light control units at any position can be controlled to be in a light transmitting state according to an actual requirement, for example, only one of the incident light control units can be controlled to be in the light transmitting state according to a requirement, or the incident light control units at multiple positions can be controlled to be in the light transmitting state at the same time, or the incident light control units at all positions can be controlled to be in the light transmitting state at the same time, which is not limited herein. In addition, the positions of the incident light control units in the light transmission state may be adjacent or spaced, and are not limited herein. The color temperature sensor is in a light-transmitting state by controlling the incident light control units at different positions, and can acquire color temperature information of light in different observation visual angle ranges.

The number of incident light control units in the light incident window control part, the area of the light incident window and the shape of the light incident window are not limited, and the number can be specifically set according to the actual requirements of products. When the light incident area of the light incident window control part is fixed, the more the number of the incident light control units is, the smaller the light incident window area allocated to each incident light control unit is, the more accurate the incident light of the light incident window control part can be controlled, and the stronger the spatial resolution capability of the color temperature sensor is. The light entrance window of the incident light control unit refers to a light transmission range of the incident light control unit in a light transmission state.

In a specific implementation, the light entrance window area of each light entrance control unit in the light entrance window control portion may be set to be uniform, and certainly, when there is a special requirement, the light entrance window area may also be set to be non-uniform, which is not limited herein. In the present application, the shape of the light entrance window of each incident light control unit may be a regular shape, for example, a rectangle, a regular hexagon, or the like, or may be an irregular shape. Alternatively, in the present application, the shape and size of the light entrance window of each incident light control unit are set to be uniform. In addition, in order to ensure that the light shielding gap between adjacent incident light control units is minimized, adjacent sides of the light entrance windows of adjacent incident light control units may be set to be parallel.

In the application, the incident light control units can be arranged in a matrix arrangement, and the color temperature sensor can collect light with different visual angles and different ranges by controlling the incident light control units at different positions to be in a light transmission state, so that the color temperature information of the light in the angle areas can be detected.

Alternatively, in the color temperature sensor provided by the present application, the light incidence window control portion is disposed in parallel with the light scattering film layer. When the light incident surface of the light incident window control part is fixed, the light incident window control part is parallel to the light scattering film layer, and the incident light visual angle range of the color temperature sensor can be enlarged as much as possible.

Further, a gap is generally provided between the light incident window control portion and the light scattering film layer to ensure that light of a large viewing angle range received by the light incident window control portion can be irradiated onto the light scattering film layer. However, the gap distance cannot be too large, and if the gap is too large, on one hand, the volume of the color temperature sensor is increased, and on the other hand, on the basis that the light incident area of the light incident window control part and the light incident area of the light scattering film layer are fixed, the gap is too large, and the light incident visual angle range of the color temperature sensor is reduced. In a specific embodiment, the gap distance L1 between the light incident window control unit and the light scattering film layer may be set according to the light incident area of the light incident window control unit and the light incident area of the light scattering film layer. On the basis of the traditional color temperature sensor, the gap distance L1 between the light incidence window control part and the light scattering film layer can be controlled to be 2mm-1cm, so that the size of the color temperature sensor can be ensured not to be too large, and the largest possible incidence visual angle range can be ensured, for example, L1 is 2mm, 5mm, 7mm or 1cm, and the like, and the color temperature sensor is not limited herein.

Further, in the color temperature sensor provided by the embodiment of the application, the area of the light incident side of the light incident window control part is larger than that of the light incident side of the light scattering film layer, so that the light collecting range of the color temperature sensor is enlarged.

In an implementation, the color temperature sensor generally further includes a processing circuit electrically connected to the multispectral sensor, and the processing circuit is configured to read and process the electrical signals output by the multispectral sensor. The processing circuit and the control circuit may be integrated on the same chip, or may be disposed on different chips, which is not limited herein.

In a specific implementation, the color temperature sensor provided in the embodiment of the present application further includes a fixing member, and the fixing member is used to fix the multispectral sensor, the light scattering film layer, and the light incidence window control portion, so as to facilitate operation of the color temperature sensor. The specific implementation of the fixing member is not limited in this application, and may be any structure that can fix the multispectral sensor, the light scattering film layer, and the light entrance window control unit. For example, the fixing member may include a first fixing bracket for fixing the multispectral sensor and the light scattering film layer, and a second fixing bracket for fixing the first fixing bracket and the light incidence window control portion together. The first fixing bracket and the second fixing bracket may be hinged or separated, and are not limited herein.

In the implementation, it is needless to say that, instead of the multispectral sensor and the light scattering film layer, a conventional color temperature sensor may be used, that is, the light entrance window control unit is directly fixed to the light entrance side of the conventional color temperature sensor by a fixing member.

It should be noted that the color temperature sensor is not limited in the number of the multispectral sensor, the light scattering film layer, and the light incident window control portion, and for example, in one embodiment, the color temperature sensor includes a multispectral sensor, a light scattering film layer, a light incident window control portion, and a control circuit and a processing circuit. In another embodiment, a color temperature sensor includes a plurality of multispectral sensors, a plurality of light scattering film layers, and a light entrance window control portion. When the color temperature sensor includes a plurality of multispectral sensors, a plurality of light scattering film layers, and a light entrance window control portion, generally, one multispectral sensor corresponds to one light scattering film layer and one light entrance window control portion. The number of the control circuits and the processing circuits is not limited in the present application, and for example, one processing circuit may correspond to one multispectral sensor, and one control circuit may correspond to one light incident window control portion. Alternatively, one control circuit may control a plurality of light entrance window control units at the same time, and one processing circuit may correspond to a plurality of multispectral sensors at the same time.

The color temperature sensor provided by the application is provided with the light incidence window control part, so that the color temperature information of light in different observation visual angle ranges can be acquired by controlling the incidence light control units at different positions in the light incidence window control part to be in a light-transmitting state. In the following, the present application will be described in detail with reference to specific embodiments of the light entrance window control unit. It should be noted that the present embodiment is for better explaining the present invention, but not limiting the present application.

In one possible implementation, the light entrance window control part is a black and white Liquid Crystal Display (LCD) panel; the black-and-white LCD panel has a plurality of pixels arranged in a matrix, and each incident light control unit is one of the plurality of pixels. Because the LCD panel has smaller pixel size and high pixel resolution, the LCD panel is utilized to realize the function of the light incidence window control part, and the color temperature sensor has higher spatial resolution.

In contrast to the color liquid crystal display panel, the black-and-white liquid crystal display panel generally has three color filters of red, green, and blue, and the black-and-white liquid crystal display panel does not need to have a filter. The black-and-white LCD panel in the present application may be any LCD panel structure without a filter film, and is not limited herein.

In practical implementation, the black-and-white liquid crystal display panel generally includes: the liquid crystal display panel comprises a first polarizer, an array substrate, a first transparent conducting layer, a first alignment film, a liquid crystal layer, a second alignment film, a second transparent conducting layer, an opposite substrate and a second polarizer which are sequentially stacked. The first transparent conductive layer comprises a plurality of pixel electrodes arranged in a matrix, and each pixel comprises a pixel electrode; the first transparent conductive layer and the second transparent conductive layer are respectively electrically connected with the control circuit.

In a specific implementation, the second transparent conductive layer may be disposed on the opposite substrate, and certainly may also be disposed on the array substrate, which is not limited in this application. The second transparent conductive layer may be provided as a whole layer, or may be divided into a plurality of sub-electrodes corresponding to the pixel electrodes one by one, and the second transparent conductive layer is not limited thereto.

In specific implementation, the base substrate and the counter substrate are both transparent substrates, and may be formed using a transparent material such as glass.

In another possible implementation, the light incidence window control part is an electrochromic structure having a plurality of pixels arranged in a matrix, and each incidence light control unit is specifically one of the plurality of pixels. Because the electrochromic structure has the characteristic of bistable state, can only consume power when discoloring, maintain the state after discoloring and do not consume power, therefore utilize the electrochromic structure to realize the function of the light incidence window control part, can make the color temperature sensor of this application have advantage that the consumption is little.

In specific implementation, the electrochromic structure mainly comprises a first transparent substrate, a first transparent conducting layer, an electrochromic layer, an electrolyte layer, an ion storage layer, a second transparent conducting layer and a second transparent substrate which are sequentially stacked; the first transparent conductive layer and/or the second transparent conductive layer comprise a plurality of sub-electrodes arranged in a matrix, and each pixel comprises one sub-electrode; the first transparent conductive layer and the second transparent conductive layer are respectively electrically connected with the control circuit. The structure of the first transparent conductive layer or the second transparent conductive layer including a plurality of sub-electrodes arranged in a matrix is similar to the structure of the first transparent conductive layer in the black-and-white LCD panel.

In yet another possible implementation, the light incidence window controlling part is an electrowetting structure having a plurality of pixels arranged in a matrix, and each incidence light controlling unit is one of the plurality of pixels. Utilize the electrowetting structure to realize the function of light incidence window control portion, can make the colour temperature sensor of this application have response time fast, the consumption is little, the advantage of not selecting to the polarization of light.

Exemplarily, the electrowetting structure mainly comprises a first transparent substrate, a first transparent conducting layer, a water layer, an oil film, a hydrophobic layer, a second transparent conducting layer and a second transparent substrate which are sequentially stacked; the first transparent conductive layer and/or the second transparent conductive layer comprise a plurality of sub-electrodes arranged in a matrix, and each pixel comprises one sub-electrode; the first transparent conductive layer and the second transparent conductive layer are respectively electrically connected with the control circuit.

In summary, the color temperature sensor provided in the embodiment of the present application is equivalent to that a light incident window control portion, such as a black-and-white LCD panel, an electrochromic structure or an electrowetting structure, is added on the light incident side of the conventional color temperature sensor, so that the capability of detecting color temperature information of different areas in the environment can be realized by controlling the light transmission state of the local area of the light incident window control portion.

In a second aspect, the present application provides an electronic device including the color temperature sensor provided in the first aspect. Specifically, the electronic device may be a mobile phone, a tablet computer, a wearable electronic device, or other common devices with a photographing function. Of course, other types of electronic devices with a shooting function are also possible. Because the color temperature sensor has the capability of detecting color temperature information of different areas in the environment, the color temperature sensor is favorable for better local color restoration and display of a plurality of scenes such as image shooting and the like.

Drawings

Fig. 1 is a schematic view of an application scenario of a color temperature sensor provided in an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a conventional color temperature sensor;

fig. 3 is a schematic structural diagram of a color temperature sensor according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a light incidence window control portion in a color temperature sensor according to an embodiment of the present disclosure;

fig. 5 is a schematic view illustrating a partial incident light control unit in a light incident window control portion according to an embodiment of the present application in a light transmitting state;

fig. 6 is a schematic view illustrating a partial incident light control unit in a light incident window control portion according to another embodiment of the present application in a light transmitting state;

fig. 7 is a schematic view illustrating a partial incident light control unit in a light incident window control portion according to another embodiment of the present application in a light transmitting state;

fig. 8 is a schematic view illustrating a state in which all incident light control units in a light incident window control portion are transparent according to still another embodiment of the present application;

fig. 9 is a schematic structural diagram of a color temperature sensor according to yet another embodiment of the present application;

fig. 10 is a schematic structural diagram of a color temperature sensor according to another embodiment of the present application;

fig. 11 is a schematic structural diagram of a color temperature sensor according to another embodiment of the present application;

fig. 12 is a schematic structural diagram of a color temperature sensor according to another embodiment of the present application;

fig. 13 is a schematic structural diagram of a black-and-white LCD panel according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of a first transparent conductive layer in a black-and-white LCD panel according to an embodiment of the present application;

FIG. 15 is a schematic diagram of an embodiment of a color temperature sensor for detecting an optical signal at a position A;

FIG. 16 is a schematic diagram of an optical signal at a detection position B of a color temperature sensor according to an embodiment of the present application;

FIG. 17 is a schematic structural diagram of an electrochromic structure provided in one embodiment of the present application;

FIG. 18 is a schematic view of the opening of a partial window in a light entrance window control section according to an embodiment of the present application;

fig. 19 is a schematic structural diagram of an electrowetting structure according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more clear, the present application will be further described in detail with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus, a repetitive description thereof will be omitted. The words used in this application to describe positions and orientations are provided by way of example in the drawings and can be changed as desired and are intended to be encompassed by the present application. The drawings of the present application are for illustrating relative positional relationships only and do not represent true scale.

It should be noted that in the following description, specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of implementation in many different ways than those herein set forth and of similar import to those skilled in the art without departing from the spirit and scope of this application. The present application is therefore not limited to the specific embodiments disclosed below. The description which follows is a preferred embodiment of the present application, but is made for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The protection scope of the present application shall be subject to the definitions of the appended claims.

The color temperature sensor in the embodiment of the present application refers to a device capable of detecting color temperature information, a color table temperature of light, or a correlated color temperature in an environment, where the color temperature is used to represent a degree of light color relative to white light so as to quantify a light color representation of a light source. The light source spectral energy is concentrated in light in the short wave direction, the color temperature is high, the color of the light source is blue, the light source spectral energy is concentrated in light in the long wave direction, the color temperature is low, and the color of the light source is red.

For the convenience of understanding the color temperature sensor provided in the embodiments of the present application, the following first describes an application scenario thereof.

The color temperature sensor provided by the embodiment of the application can be applied to electronic equipment, such as mobile phones, tablet computers, wearable electronic equipment and other common equipment with a photographing function. Of course, the method can also be applied to other types of electronic equipment with shooting function. As shown in fig. 1, when the image sensor 2 provided in the embodiment of the present application is applied in a mobile terminal, the mobile terminal includes a housing 1 and a color temperature sensor 2 disposed in the housing 1 or partially protruding from the housing 1, and is electrically connected to a main board 3 in the housing 1. When the light of the target object is incident on the color temperature sensor 2, the optical signal can be converted into an electrical signal by the color temperature sensor 2 for the imaging process.

Currently, the structure of a conventional color temperature sensor is shown in fig. 2, and mainly includes a multispectral sensor 21, a light scattering film layer 22 disposed on the light incident side of the multispectral sensor 21, and a processing circuit (not shown in fig. 2). The multispectral sensor 21 is configured to receive light from the outside, and convert optical signals with different wavelengths into electrical signals through photoelectric conversion, thereby sensing the spectral distribution of the optical signals incident on the multispectral sensor 21. The light scattering film layer 22 is used to scatter incident light from different positions in space (such as A, B and C position in the figure), so that the incident light from different positions can be irradiated onto the multispectral sensor 21 after passing through the light scattering film layer 22. The processing circuit is used for reading and processing the electric signals output by the multispectral sensor 21. In this color temperature sensor, it is not possible to determine whether the optical signal specifically comes from the spatial position A, B or C due to the presence of the light-scattering film layer 22. Namely, the color temperature sensor can indiscriminately detect the spectral information within the whole field angle and does not have the spatial resolution capability of the color temperature information. However, in some cases, the distribution of the ambient light source is complicated, the electronic device needs to estimate the local color temperature of the environment, and therefore the conventional color temperature sensor cannot solve the color problem in the mixed light source scene.

Based on this, this application embodiment provides a new colour temperature sensor, through the light incidence window control portion that the local luminousness of space that increases programmable control at the income light side of traditional colour temperature sensor is changeable, realizes the collection of different visual angle region spectral information, helps solving the problem that meets in the restoration of colour effect and the demonstration in the mixed colour temperature scene etc.. The color temperature sensor provided by the embodiment of the present application is specifically described below with reference to the accompanying drawings.

Fig. 3 schematically shows a structure of the color temperature sensor according to an embodiment of the present application.

Referring to fig. 3, the color temperature sensor 10 provided by the embodiment of the present application includes: a multispectral sensor 11, a light scattering film layer 12, a light entrance window control unit 13, and a control circuit 14. The multispectral sensor 11 is configured to convert a received optical signal into an electrical signal; the light scattering film layer 12 is disposed on the light incident side of the multispectral sensor 11, and is configured to scatter incident light from different spatial locations (such as A, B and the C location in the drawing), so that a part of the scattered light will be received by the multispectral sensor 11, and the multispectral sensor is utilized to convert the received optical signals of different wavelength bands into electrical signals. That is, the light scattering film layer 12 is used to ensure that light from different positions in space can be irradiated onto the multispectral sensor 11. The light scattering film layer 12 may be made of a transparent material, such as frosted ground glass or a transparent plastic with a rough surface, which is not limited herein. The light entrance window control unit 13 is disposed on a side of the light scattering film layer 12 away from the multispectral sensor 11, that is, the light entrance window control unit 13 is disposed on a light entrance side of the light scattering film layer 12.

Referring to fig. 4, fig. 4 is a schematic top view of a light incident window control portion according to an embodiment of the present disclosure. The light incident window control section 13 includes a plurality of incident light control units 130 (36 incident light control units are exemplified in the figure), each of the incident light control units 130 of the plurality of incident light control units 130 is configured to be in a light transmitting state or a light shielding state when a different voltage is applied thereto; the control circuit 14 is electrically connected to the plurality of incident light control units 130 in the light incident window control portion 13, and is configured to apply a voltage to each of the incident light control units 130, so that the incident light control unit 130 is in a light transmitting state or a light blocking state.

The color temperature sensor 10 provided by the present application is equivalent to that a light incident window control portion with a controllable incident light window is added on the light incident side of the conventional color temperature sensor, when color temperature information in an environment needs to be sensed, the color temperature sensor 10 will face the environment needing to be sensed, light from the environment will firstly irradiate to the light incident window control portion 13, and each incident light control unit 130 in the light incident window control portion 13 can be in a light transmitting state or a light shielding state under the control of the control circuit 14. When light in a specific viewing angle range needs to be detected, the control circuit 14 controls the incident light control unit 130 at the position corresponding to the specific viewing angle range to be in a light transmitting state, and the incident light control units 130 at the other positions to be in a light shielding state, so that only light in the specific viewing angle range enters the light scattering film layer 12 through the incident window control part 13 and is irradiated onto the multispectral sensor 11 through the scattering effect of the light scattering film layer 12, and the color temperature sensor 10 can collect light from different viewing angles in a targeted manner, so that the color temperature sensor 10 has the capability of detecting color temperature information of light in the specific viewing angle range.

In practical implementation, since each incident light control unit 130 in the light incident window control portion 13 can be independently controlled by the control circuit 14, the incident light control units 130 at any position can be controlled to be in the light transmitting state according to actual requirements, for example, only one of the incident light control units 130 can be controlled to be in the light transmitting state according to requirements, for example, as shown in fig. 5, only the incident light control unit 130 at the position 10 is controlled to be in the light transmitting state, and the incident light control units 130 at other positions are all controlled to be in the light shielding state. It is also possible to control a plurality of or all of the incident light control units 130 to be in a light-transmitting state at the same time, for example, as shown in fig. 6, while controlling the incident light control units 130 at

positions

15, 16, 21, and 22 to be in a light-transmitting state, and controlling the incident light control units 130 at other positions to be in a light-shielding state; for example, as shown in fig. 7, the incident light control units 130 at positions 1 to 6 may be controlled to be in a light-transmitting state, and the incident light control units 130 at other positions may be controlled to be in a light-shielding state; for example, as shown in fig. 8, the incident light control units 130 at positions 1 to 36 may be controlled to be in a light-transmitting state, which is not limited herein. The positions of the incident light control units 130 in the light transmission state may be adjacent to each other or spaced apart from each other, and are not limited herein. That is, the color temperature sensor 10 of the present application can acquire color temperature information of light in different viewing angle ranges by controlling the incident light control unit 130 at different positions to be in a light-transmitting state.

The number, the area and the shape of the light entrance window of the light entrance light control unit 130 in the light entrance window control unit 13 are not limited, and can be specifically set according to the actual requirements of the product. When the light incident surface area of the light incident window control part 13 is fixed, the larger the number of the incident light control units 130 is, the smaller the light incident window area of the incident light control unit 130 is, and the stronger the spatial resolution capability of the color temperature sensor 10 is. The light entrance window of the incident light control unit 130 refers to a light transmission range of the incident light control unit 130 in a light transmission state.

In practical implementation, the light entrance window area of each light entrance control unit 130 in the light entrance window control section 13 may be set to be uniform, and may be set to be non-uniform when a special requirement is met, which is not limited herein. In the present application, the shape of the light entrance window of each incident light control unit 130 may be a regular shape, for example, a rectangle or a regular hexagon as shown in fig. 4, or may be an irregular shape. Alternatively, in the present application, the shape and size of the light entrance window of each incident light control unit 130 are set to be uniform. In addition, in order to ensure that the light-shielding gap between the adjacent incident light control units 130 is minimized, the adjacent sides of the light-entrance windows of the adjacent incident light control units 130 may be disposed in parallel.

In the present application, the incident light control units 130 may be arranged in a matrix arrangement, and the color temperature sensor 10 may collect light with different viewing angles and different ranges by controlling the incident light control units 130 at different positions to be in a light-transmitting state, so as to detect color temperature information of light in these angle regions.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a color temperature sensor according to another embodiment of the present application. In the color temperature sensor 10 provided in the present application, the light incidence window control section 13 is provided in parallel with the light scattering film layer 12. Thus, when the light incident surface area of the light incident window control part 13 is fixed, the light incident surface of the light incident window control part 13 is parallel to the light incident surface of the light scattering film layer 12, so that the light incident visual angle range of the color temperature sensor can be as large as possible.

Further, a gap is generally provided between the light incident window control portion 13 and the light scattering film layer 12 to ensure that light with a larger viewing angle range received by the light incident window control portion 13 can irradiate onto the light scattering film layer 12, but the gap distance cannot be too large, if the gap is too large, on one hand, the volume of the color temperature sensor is increased, and on the other hand, on the basis that the light incident area of the light incident window control portion 13 is fixed with the light incident area of the light scattering film layer 12, the gap is too large, and the light incident viewing angle range of the color temperature sensor is reduced. In a specific implementation, the gap distance L1 between the light incident window control unit 13 and the light scattering film layer 12 may be set according to the light incident area of the light incident window control unit 13 and the light incident area of the light scattering film layer 12. On the basis of the conventional color temperature sensor, the gap distance L1 between the light incidence window control part 13 and the light scattering film layer 12 can be controlled to be between 2mm and 1cm, so that the volume of the color temperature sensor can be ensured not to be too large, and the largest possible incident light visual angle range can be ensured, for example, L1 is 2mm, 5mm, 7mm, 1cm and the like, which is not limited herein.

With continued reference to fig. 9, it is preferable that, in the color temperature sensor 10 provided in the embodiment of the present application, an area S1 of the light incident side of the light incident window control portion 13 is larger than an area S2 of the light incident side of the light scattering film layer 12, so as to increase a lighting range of the color temperature sensor 10.

In a specific implementation, the color temperature sensor may further include a processing circuit electrically connected to the multispectral sensor, and the processing circuit is configured to read and process the electrical signals output by the multispectral sensor. The processing circuit and the control circuit may be integrated on the same chip, or may be disposed on different chips, which is not limited herein.

Referring to fig. 9, in the color temperature sensor 10 provided in the embodiment of the present application, a fixing member 15 is further included, and the fixing member 15 is configured to fix the multispectral sensor 11, the light scattering film layer 12, and the light incidence window control portion 13, so as to facilitate operation of the color temperature sensor. The fixing member 15 is not limited to a specific implementation manner, and may be any structure capable of fixing the multispectral sensor 11, the light scattering film layer 12, and the light entrance window control portion 13. For example, as shown in fig. 9, the fixing member 15 may include a first fixing bracket 151 for fixing the multispectral sensor 11 and the light scattering film layer 12, and a second fixing bracket 152 for fixing the first fixing bracket 151 and the light entrance window control portion 13 together. The first fixing bracket 151 and the second fixing bracket 152 may be hinged or separated, and are not limited herein.

Of course, in implementation, a conventional color temperature sensor may be used instead of the multispectral sensor 11 and the light scattering film layer 12, that is, the light entrance window control part 13 is directly fixed to the light entrance side of the conventional color temperature sensor by using the fixing member 15.

It should be noted that, in the color temperature sensor 10, the number of the multispectral sensor 11, the light scattering film layer 12, and the light entrance window control portion 13 is not limited, for example, as shown in fig. 10, the color temperature sensor 10 includes one multispectral sensor 11, one light scattering film layer 12, one light entrance window control portion 13, and one control circuit 14 and one processing circuit 16, or as shown in fig. 11 and 12, the color temperature sensor 10 includes a plurality of multispectral sensors 11, a plurality of light scattering film layers 12, and the light entrance window control portion 13. When the color temperature sensor includes a plurality of multispectral sensors 11, a plurality of light scattering film layers 12, and the light entrance window control portion 13, as shown in fig. 11 and 12, one multispectral sensor 11 may correspond to one light scattering film layer 12 and one light entrance window control portion 13. The number of the control circuits 14 and the processing circuits 16 is not limited in the present application, and for example, as shown in fig. 11, one processing circuit 16 may correspond to one multispectral sensor 11, and one control circuit 14 may correspond to one light incidence window control portion 13. Alternatively, as shown in fig. 12, one control circuit 14 may control a plurality of the light entrance window control units 13 at the same time, and one processing circuit 14 may correspond to a plurality of the multispectral sensors 11 at the same time.

The color temperature sensor provided by the application is just provided with the light incidence window control part, so that the color temperature information of light in different observation visual angle ranges can be acquired by controlling the incidence light control units at different positions in the light incidence window control part to be in a light-transmitting state. In the following, the present application will be described in detail with reference to specific embodiments of the light entrance window control unit. It should be noted that the embodiment is for better explaining the technical solution of the present application, but does not limit the protection scope of the present application.

Example 1

The light incidence window control part is a black-and-white Liquid Crystal Display (LCD) panel; the black-and-white LCD panel has a plurality of pixels arranged in a matrix, and each of the incident light control units is one of the plurality of pixels. Because the LCD panel has smaller pixel size and high pixel resolution, the LCD panel is utilized to realize the function of the light incidence window control part, and the color temperature sensor has higher spatial resolution.

In specific implementation, referring to fig. 13, the black-and-white lcd panel 100 generally includes: the liquid crystal display panel comprises a first polarizer 101, an array substrate 102, a first transparent conductive layer 103, a first alignment film 104, a liquid crystal layer 105, a second alignment film 106, a second transparent conductive layer 107, an opposite substrate 108 and a second polarizer 109 which are sequentially stacked. Referring to fig. 14, the first transparent conductive layer 103 includes a plurality of pixel electrodes 1030 arranged in a matrix, and each pixel includes one pixel electrode 1030; the first transparent conductive layer 103 and the second transparent conductive layer 104 are electrically connected to the control circuit 14, respectively.

The array substrate generally comprises a substrate and a circuit film layer located on the substrate, a pixel driving circuit array and various routing lines are arranged in the circuit film layer, and each pixel driving circuit in the pixel driving circuit array is correspondingly connected with one pixel electrode.

In a specific implementation, the second transparent conductive layer may be disposed on the opposite substrate 108 as shown in fig. 13, or may be disposed on the array substrate 102, which is not limited in the present application. The second transparent conductive layer may be provided as a whole layer, or may be divided into a plurality of sub-electrodes corresponding to the pixel electrodes one by one, and is not limited thereto.

The operation principle of the black-and-white LCD panel will be described below by taking a Twisted Nematic (TN) LCD panel as an example. TN-LCD panel uses TN type liquid crystal whose liquid crystal molecules are elliptical. TN mode liquid crystal molecules are generally connected in series along the long axis direction, the long axes are arranged in parallel, the alignment directions of the first alignment film and the second alignment film in the black-and-white LCD panel are perpendicular to each other, and when the liquid crystal molecules contact the alignment films, the liquid crystal molecules are arranged along the alignment direction of the alignment films. The polarization directions of the first polarizer and the second polarizer in the black-and-white LCD panel are mutually vertical, the polarization direction of the first polarizer is consistent with the alignment direction of the first alignment film, and the polarization direction of the second polarizer is consistent with the alignment direction of the second alignment film. For each pixel, when the control circuit does not apply voltage to the pixel electrode and the second transparent conductive layer corresponding to the pixel, the liquid crystal molecules are arranged in a twisted mode, incident light transmits through the polarizer and then propagates along the arrangement mode of the liquid crystal molecules to be twisted by 90 degrees, and finally the polarization direction of the incident light is deflected by 90 degrees, so that the pixel is in a light-transmitting state. When the control circuit applies voltage to the pixel electrode and the second transparent conducting layer corresponding to the pixel, the arrangement mode of the liquid crystal molecules is changed, the incident light is transmitted along the gap of the liquid crystal molecules, the original polarization direction of the incident light is kept unchanged, the polarization direction of the light is perpendicular to the polarization direction of the polaroid when the incident light reaches the other substrate of the black-white LCD panel, the light is absorbed and cannot penetrate through the other substrate, and the pixel is in a shading state.

The control circuit provides voltage to the pixel electrodes through pixel driving circuits on the array substrate, and each pixel driving circuit corresponds to one pixel electrode. The pixel driving circuit is generally composed of a Thin Film Transistor (TFT), and each pixel driving circuit on the black-and-white LCD panel can be independently applied with a voltage by controlling the pixel driving circuit, so that the pixel driving circuit is turned on or off. When the pixel driving circuit is in an off state, no voltage is applied to the corresponding pixel electrode, and light can pass through the pixel driving circuit, i.e., the corresponding pixel is in a light-transmitting state. When the pixel driving circuit is in a conducting state, the control circuit applies voltage to the corresponding pixel electrode and the second transparent conductive layer through the pixel driving circuit, and light cannot penetrate through the control circuit, namely the corresponding pixel is in a shading state. The control circuit controls the voltage of the pixel electrode corresponding to each pixel in the black-and-white LCD panel and the voltage of the second transparent conductive layer to control the light-passing state of the pixel, so that the color temperature sensor can selectively detect different visual angles.

In this embodiment, the black-and-white LCD panel can be placed in front of the conventional color temperature sensor through a fixing member, and the plane of the black-and-white LCD panel and the plane of the multispectral sensor are generally parallel to each other. The black and white LCD panel is spaced from the surface of the light scattering film layer by a distance, typically between 2mm and 1cm. The area of the black-and-white LCD panel is generally larger than that of the light scattering film layer so that it can better cover the spatial range to be detected.

Referring to fig. 15 and 16, fig. 15 and 16 show two window positions of the light incident window control part, respectively, wherein in fig. 15, light from position a is incident on the light scattering film layer 12 through the light incident window control part 13, such as a black and white LCD panel, and a part of the light is incident on the multispectral sensor 11 through the scattering action of the light scattering film layer 12, and the light from positions B and C cannot be irradiated onto the light scattering film layer 12 through the black and white LCD panel due to the straight-line propagation principle of the light, so that the multispectral sensor 11 cannot receive the light from spatial positions B and C, and thus, the color temperature sensor 10 can only detect the color temperature information of the light at spatial position a. In fig. 16, light from a position B is incident on the light scattering film layer 12 through the light incidence window control portion 13, such as a black-and-white LCD panel, and a part of the light is incident on the multispectral sensor 11 through the scattering action of the light scattering film layer 12, and light from the positions a and C cannot be irradiated onto the light scattering film layer 12 through the black-and-white LCD panel due to the principle of linear propagation of light, so that the multispectral sensor 11 cannot receive light from the spatial positions a and C, and thus the color temperature sensor 10 can only detect color temperature information of light at the spatial position B.

In specific implementation, the window corresponding to the spatial position C in the black-and-white LCD panel may be selectively opened to collect only the color temperature information corresponding to the light ray at the position C, the windows corresponding to the spatial position a and the spatial position B may be simultaneously opened to collect the overall color temperature information of the light rays at the positions a and B, and of course, a larger window may be opened on the black-and-white LCD panel to collect the overall color temperature information of the light rays at a larger spatial position. In particular, the maximum spatial field of view that can be perceived by the color temperature sensor is made up of the union of the angular spread of the window on the black and white LCD panel with respect to each point of the light scattering film layer.

The embodiment can collect light from different spatial positions by controlling the light transmission states of pixels at different positions on the black-and-white LCD panel, so that the color temperature sensing can realize the collection of color temperature information at different spatial positions. The ability to detect spatial local color temperature information can be achieved in particular by combining a black and white LCD panel with a conventional color temperature sensor.

Example two

The light incident window control unit is an electrochromic structure having a plurality of pixels arranged in a matrix, and each of the incident light control units is specifically one of the plurality of pixels. Because the electrochromic structure has the characteristic of bistable state, can only consume power when changing color, and can not consume power when maintaining the state after changing color, therefore, the function of the light incidence window control part is realized by utilizing the electrochromic structure, and the color temperature sensor has the advantage of low power consumption.

Electrochromism refers to a phenomenon that optical properties (reflectivity, transmittance, absorption rate and the like) of a material are subjected to stable and reversible color change under the action of an external electric field, and the material is presented with reversible changes of color and transparency in appearance. Therefore, the electrochromic structure formed by using the electrochromic principle is also a structure capable of controlling light transmittance, and the electrochromic structure in the present application may be any electrochromic structure having a plurality of pixels arranged in a matrix, as long as each pixel in the electrochromic structure can independently realize light transmission or light shielding, and is not limited herein.

In specific implementation, referring to fig. 17, the electrochromic structure 200 mainly includes a first transparent substrate 201, a first transparent conductive layer 202, an electrochromic layer 203, an electrolyte layer 204, an ion storage layer 205, a second transparent conductive layer 206, and a second transparent substrate 207, which are sequentially stacked; the first transparent conductive layer 202 and/or the second transparent conductive layer 206 comprise a plurality of sub-electrodes arranged in a matrix, and each pixel comprises one sub-electrode; the first transparent conductive layer 1301 and the second transparent conductive layer 1305 are electrically connected to the control circuit 14, respectively. Specifically, the structure of the first transparent conductive layer 202 or the second transparent conductive layer 206 including a plurality of sub-electrodes arranged in a matrix is similar to the structure of the first transparent conductive layer in the black-and-white LCD panel, and refer to the structure of the first transparent conductive layer in fig. 14.

The electrochromic structure 200 has the working principle that: for each pixel, when the control circuit 14 does not apply a voltage to the first transparent conductive layer 202 and the second transparent conductive layer 206 corresponding to the pixel, the region of the electrochromic layer 203 corresponding to the pixel is in a light-transmitting state, so that the pixel is in a light-transmitting state. When the control circuit 14 applies a voltage to the first transparent conductive layer 202 and the second transparent conductive layer 206 corresponding to the pixel, electrons enter the region of the electrochromic layer 203 corresponding to the pixel, and an electrochemical oxidation-reduction reaction occurs between the electrochromic layer 203 and the region corresponding to the pixel, so that light absorption or reflection of the region changes, and the region is converted from a light-transmitting state to a coloring state, that is, the pixel is in a light-shielding state. The light-passing state of each pixel is controlled by controlling the voltage of the first transparent electrode layer and the second transparent electrode layer corresponding to each pixel in the electrochromic structure through the control circuit, so that the color temperature sensor can selectively detect different visual angles.

In this embodiment, the ability to control the opening of the local window can be achieved by controlling the light transmission state of each pixel in the electrochromic structure. For example, in fig. 18, the control circuit applies no voltage to the pixels at the central 4 positions and applies voltages to the pixels at the remaining positions, and then only the central region exhibits a light-transmitting state and the other regions exhibit a light-shielding state.

In this embodiment, the electrochromic structure may be placed in front of a conventional color temperature sensor by means of a fixture, typically with the plane of the electrochromic structure and the plane of the multispectral sensor parallel to each other. The electrochromic structure is at a distance, typically between 2mm and 1cm, from the surface of the light-scattering film layer. The area of the electrochromic structure is generally larger than the area of the light-scattering film layer, so that it can better cover the spatial range to be detected.

Referring to fig. 15 and 16, fig. 15 and 16 respectively show two window positions of the light incidence window control part, wherein in fig. 15, light from position a is incident on the light scattering film layer 12 through the light incidence window control part 13 such as an electrochromic structure, and a part of the light is incident on the multispectral sensor 11 through the scattering action of the light scattering film layer 12, and the light from positions B and C cannot be irradiated on the light scattering film layer 12 through the electrochromic structure due to the straight-line propagation principle of the light, so that the multispectral sensor 11 cannot receive the light from spatial positions B and C, and thus the color temperature sensor 10 can only detect the color temperature information of the light at spatial position a. In fig. 16, light from the position B is incident on the light scattering film layer 12 through the light incidence window control portion 13 such as the electrowetting structure, and a part of the light is incident on the multispectral sensor 11 through the scattering action of the light scattering film layer 12, and the light from the positions a and C cannot be irradiated onto the light scattering film layer 12 through the electrowetting structure due to the straight-line propagation principle of the light, so that the multispectral sensor 11 cannot receive the light from the spatial positions a and C, and thus the color temperature sensor 10 can only detect the color temperature information of the light at the spatial position B at this time.

In specific implementation, the window corresponding to the spatial position C in the electrowetting structure may be selectively opened to collect only the color temperature information corresponding to the light ray at the position C, the windows corresponding to the spatial position a and the spatial position B may be simultaneously opened to collect the overall color temperature information of the light rays at the positions a and B, and of course, a larger window may be opened on the electrowetting structure to collect the overall color temperature information of the light rays at a larger spatial position. In particular, the maximum spatial field of view that can be perceived by the color temperature sensor is constituted by the union of the angular spread of the window on the electrowetting structure with respect to each point of the light scattering film.

The embodiment can collect light from different spatial positions by controlling the light transmission states of pixels at different positions on the electrowetting structure, so that color temperature sensing can realize the collection of color temperature information at different spatial positions. The ability to detect spatially localized color temperature information can be achieved in particular by combining electrowetting structures with conventional color temperature sensors.

Example three

The light incident window control section is an electrowetting structure having a plurality of pixels arranged in a matrix, and each of the incident light control units is one of the plurality of pixels. Utilize the electrowetting structure realizes the function of light incidence window control portion can make the colour temperature sensor of this application have response time fast, the consumption is little, does not carry out the advantage of selecting to the polarization of light.

The electrowetting structure is also a structure capable of controlling light transmission capability, and referring to fig. 19, the electrowetting structure 300 mainly includes a first transparent substrate 301, a first transparent conductive layer 302, a water layer 303, an oil film 304, a hydrophobic layer 305, a second transparent conductive layer 306, and a second transparent substrate 307, which are sequentially stacked; the first transparent conductive layer 102 and/or the second transparent conductive layer 306 comprise a plurality of sub-electrodes arranged in a matrix, and each pixel comprises one sub-electrode; the first transparent conductive layer 302 and the second transparent conductive layer 306 are electrically connected to the control circuit 14, respectively. Specifically, the structure of the first transparent conductive layer 202 or the second transparent conductive layer 206 including a plurality of sub-electrodes arranged in a matrix is similar to the structure of the first transparent conductive layer in the black-and-white LCD panel, and can be referred to as the structure of the first transparent conductive layer in fig. 14. In one embodiment, the electrowetting structure 300 further includes a pixel wall (not shown) corresponding to each pixel, and an oil film 304 corresponding to each pixel is defined in the corresponding pixel wall.

The electro-wetting principle is that the oil film is spread between the hydrophobic layer and the water layer or scattered in the corner by changing the wetting characteristics of the hydrophobic layer and the water layer. The operational principle of the electrowetting structure 300 is as follows: for each pixel, when the control circuit 14 does not apply a voltage to the first transparent conductive layer 302 and the second transparent conductive layer 306 corresponding to the pixel, the oil film 304 corresponding to the pixel is laid between the hydrophobic layer 305 and the water layer 303, and the pixel is in a light-blocking state, and when the control circuit 14 applies a voltage to the first transparent conductive layer 302 and the second transparent conductive layer 306 corresponding to the pixel, the oil film 304 is scattered in the corner of the pixel wall, and the pixel is in a light-transmitting state.

In this embodiment, the ability to control the opening of the partial window can be achieved by controlling the light transmission state of each pixel in the electrowetting structure. For example, in fig. 18, the control circuit applies a voltage to the pixels at the central 4 positions and does not apply a voltage to the pixels at the remaining positions, and then only the central region exhibits a light-transmitting state and the other regions exhibit a light-shielding state.

In this embodiment, the electrowetting structure may be placed in front of a conventional color temperature sensor by means of a fixture, typically with the plane of the electrowetting structure and the plane of the multispectral sensor parallel to each other. The electrowetting structure is at a distance, typically between 2mm and 1cm, from the surface of the light scattering film layer. The electrowetting structure generally has a larger area than the light scattering film layer, so that it can better cover the spatial area to be detected.

Referring to fig. 15 and 16, fig. 15 and 16 respectively show two window positions of the light incidence window control part, wherein in fig. 15, light from the position a is incident on the light scattering film layer 12 through the light incidence window control part 13 such as an electrowetting structure, and a part of the light is incident on the multispectral sensor 11 through the scattering action of the light scattering film layer 12, and the light from the positions B and C cannot be irradiated onto the light scattering film layer 12 through the electrowetting structure due to the straight-line propagation principle of the light, so that the multispectral sensor 11 cannot receive the light from the spatial positions B and C, and thus the color temperature sensor 10 can only detect the color temperature information of the light at the spatial position a. In fig. 16, light from the position B is incident on the light scattering film layer 12 through the light incidence window control portion 13 such as the electrowetting structure, and a part of the light is incident on the multispectral sensor 11 through the scattering action of the light scattering film layer 12, and the light from the positions a and C cannot be irradiated onto the light scattering film layer 12 through the electrowetting structure due to the straight-line propagation principle of the light, so that the multispectral sensor 11 cannot receive the light from the spatial positions a and C, and the color temperature sensor 10 can only detect the color temperature information of the light at the spatial position B at this time.

The embodiment of the application also provides electronic equipment comprising any one of the color temperature sensors provided by the embodiment of the application. Specifically, the electronic device may be a mobile phone, a tablet computer, a wearable electronic device, or other common devices with a photographing function. Of course, other types of electronic devices with a shooting function may also be used. Because the color temperature sensor has the capability of detecting color temperature information of different areas in the environment, the color temperature sensor is favorable for better local color restoration and display of a plurality of scenes such as image shooting and the like.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

A color temperature sensor, comprising:

the multispectral sensor is used for converting the received optical signals into electric signals;

the light scattering film layer is arranged on the light incidence side of the multispectral sensor;

a light incidence window control portion disposed on a side of the light scattering film layer facing away from the multispectral sensor, the light incidence window control portion including a plurality of incidence light control units, each of the incidence light control units being configured to be in a light transmitting state or a light blocking state when different voltages are applied thereto;

and the control circuit is electrically connected with the incident light control units respectively and is used for applying voltage to each incident light control unit so as to enable the incident light control units to be in a light transmitting state or a light shading state.
The color temperature sensor according to claim 1, wherein the light incidence window control section is a black-and-white liquid crystal display panel; the black-and-white liquid crystal display panel has a plurality of pixels arranged in a matrix, and each of the incident light control units is one of the plurality of pixels.
The color temperature sensor according to claim 2, wherein the black-and-white liquid crystal display panel comprises: the liquid crystal display panel comprises a first polarizer, an array substrate, a first transparent conducting layer, a first alignment film, a liquid crystal layer, a second alignment film, a second transparent conducting layer, an opposite substrate and a second polarizer which are sequentially stacked;

the first transparent conductive layer comprises a plurality of pixel electrodes arranged in a matrix, and each pixel comprises one pixel electrode;

the first transparent conducting layer and the second transparent conducting layer are respectively electrically connected with the control circuit.
The color temperature sensor according to claim 1, wherein the light incidence window control section is an electrochromic structure having a plurality of pixels arranged in a matrix, each of the incidence light control units being one of the plurality of pixels.
The color temperature sensor according to claim 4, wherein the electrochromic structure comprises a first transparent substrate, a first transparent conductive layer, an electrochromic layer, an electrolyte layer, an ion storage layer, a second transparent conductive layer, and a second transparent substrate, which are sequentially stacked;

the first transparent conductive layer or the second transparent conductive layer comprises a plurality of sub-electrodes arranged in a matrix, and each pixel comprises one sub-electrode;

the first transparent conducting layer and the second transparent conducting layer are respectively electrically connected with the control circuit.
The color temperature sensor according to claim 1, wherein the light incidence window control section is an electrowetting structure having a plurality of pixels arranged in a matrix, each of the incidence light control units being one of the plurality of pixels.
The color temperature sensor of claim 6, wherein the electrowetting structure comprises a first transparent substrate, a first transparent conductive layer, a water layer, an oil film, a hydrophobic layer, a second transparent conductive layer, and a second transparent substrate, which are sequentially stacked;

the first transparent conductive layer or the second transparent conductive layer comprises a plurality of sub-electrodes arranged in a matrix, and each pixel comprises one sub-electrode;

the first transparent conductive layer and the second transparent conductive layer are respectively electrically connected with the control circuit.
The color temperature sensor of any one of claims 1 to 7, wherein a gap is provided between the light incidence window control portion and the light scattering film layer.
The color temperature sensor of claim 8, wherein a gap distance between the light incidence window control portion and the light scattering film layer is 2mm to 1cm.
The color temperature sensor according to any one of claims 1 to 9, wherein an area of a light incident side of the light incident window control portion is larger than an area of a light incident side of the light scattering film layer.
The color temperature sensor according to any one of claims 1 to 10, wherein the light incidence window control portion is provided in parallel with the light scattering film layer.
The color temperature sensor of any one of claims 1 to 11, further comprising a fixing member for fixing the multispectral sensor, the light scattering film layer, and the light entrance window control portion.
The color temperature sensor according to any one of claims 1 to 12, further comprising a processing circuit electrically connected to the multispectral sensor, the processing circuit configured to read and process the electrical signals output by the multispectral sensor.
An electronic device characterized by comprising the color temperature sensor according to any one of claims 1 to 13.