Image sensor and control method thereof, electronic device, and display apparatus

Abstract

The application discloses an image sensor, a control method thereof, an electronic device and a display device. The image sensor comprises a photosensitive element layer and a color filter array, and a plurality of light filtering units correspond to a plurality of photosensitive elements respectively. Each light filtering unit comprises a first wavelength reflecting unit, a second wavelength reflecting unit and a third wavelength reflecting unit. The first wavelength reflecting unit is used for reflecting incident light of a first wavelength when in a reflecting state. The second wavelength reflecting unit is used for reflecting incident light of a second wavelength when in the reflecting state. The third wavelength reflecting unit is used for reflecting incident light of a third wavelength when in the reflecting state. A same photosensitive element within a preset time is used for receiving incident light of one of the first wavelength, the second wavelength and the third wavelength. The application improves the utilization rate of the image sensor on light, especially in low light, and has the advantages of reducing noise and improving image quality.

Description

Technical Field

[0001] This application relates to the field of optical imaging technology, and in particular to an image sensor and its control method, electronic device and display device. Background Technology

[0002] An image sensor is a device that converts optical images into electronic signals. Its core is a pixel array, composed of millions or even hundreds of millions of tiny photosensitive elements. Each photosensitive subpixel includes a photosensitive element, typically a photodiode, which, controlled by a readout circuit, converts the optical image into an electrical signal for readout. However, photosensitive elements generally cannot distinguish colors. Therefore, a color filter array is usually placed on the photosensitive element. By using filter units of different basic colors (such as red, green, and blue), each photosensitive element position can only receive light signals of one basic color. Subsequently, the image processor uses interpolation algorithms to estimate the complete red, green, and blue values ​​of each pixel based on the color information of surrounding pixels, thereby reconstructing a color image.

[0003] However, each sub-pixel can only receive light of one basic color after passing through the color filter, resulting in low light utilization by the sensor, especially in low light conditions where it is prone to problems such as increased noise and degraded image quality. Therefore, those skilled in the art urgently need a technical solution to address these issues. Summary of the Invention

[0004] The purpose of this application is to provide an image sensor and its control method, electronic device and display device. By setting a first wavelength reflection unit, a second wavelength reflection unit and a third wavelength reflection unit, this application improves the utilization rate of light by the image sensor, especially under low light conditions, and has advantages such as reducing noise and improving image quality.

[0005] This application discloses an image sensor, including a photosensitive element layer and a color filter array. The photosensitive element layer includes a plurality of photosensitive elements arranged in an array, each photosensitive element including a photosensitive sub-pixel. The color filter array is disposed above the photosensitive element layer and includes a plurality of filter units arranged in an array, each filter unit corresponding to a plurality of photosensitive elements. Each filter unit includes a first wavelength reflection unit, a second wavelength reflection unit, and a third wavelength reflection unit. The first wavelength reflection unit is disposed on the photosensitive element, the second wavelength reflection unit is disposed on the first wavelength reflection unit, and the third wavelength reflection unit is disposed on... The second wavelength reflection unit; the first wavelength reflection unit is used to reflect incident light of a first wavelength when in a reflection state; the second wavelength reflection unit is used to reflect incident light of a second wavelength when in a reflection state; the third wavelength reflection unit is used to reflect incident light of a third wavelength when in a reflection state; the same photosensitive element within a preset time period is used to receive incident light of one of the three wavelengths: the first wavelength, the second wavelength, and the third wavelength; the first wavelength reflection unit, the second wavelength reflection unit, and the third wavelength reflection unit each include a cholesterol-type liquid crystal and an electrode for controlling the cholesterol-type liquid crystal, and are in a reflection state under the control of the corresponding electrode.

[0006] Optionally, the first wavelength is a red wavelength, the second wavelength is a green wavelength, and the third wavelength is a blue wavelength.

[0007] Optionally, the first wavelength reflection unit includes a first electrode, a red cholesterol-type liquid crystal, and a second electrode, wherein the red cholesterol-type liquid crystal is disposed between the first electrode and the second electrode; the red cholesterol-type liquid crystal is used to switch between a transparent state and a reflective state under the control of the first electrode and the second electrode; the second wavelength reflection unit includes a third electrode, a green cholesterol-type liquid crystal, and a fourth electrode, wherein the green cholesterol-type liquid crystal is disposed between the third electrode and the fourth electrode; the green cholesterol-type liquid crystal is used to switch between a transparent state and a reflective state under the control of the third electrode and the fourth electrode; the third wavelength reflection unit includes a fifth electrode, a blue cholesterol-type liquid crystal, and a sixth electrode, wherein the blue cholesterol-type liquid crystal is disposed between the fifth electrode and the sixth electrode; the blue cholesterol-type liquid crystal is used to switch between a transparent state and a reflective state under the control of the fifth electrode and the sixth electrode; within the preset time period, only one of the first wavelength reflection unit, the second wavelength reflection unit, and the third wavelength reflection unit is in the transparent state.

[0008] Optionally, in the plurality of first wavelength reflective units, the plurality of first electrodes are interconnected, and the plurality of second electrodes are interconnected; in the plurality of second wavelength reflective units, the plurality of third electrodes are interconnected, and the plurality of fourth electrodes are interconnected; in the plurality of third wavelength reflective units, the plurality of fifth electrodes are interconnected, and the plurality of sixth electrodes are interconnected; during a first preset time period, the plurality of first wavelength reflective units are in a light-transmitting state, and the plurality of second wavelength reflective units and the plurality of third wavelength reflective units are in a reflective state, and the plurality of photosensitive elements receive incident light of red wavelength; during a second preset time period, the plurality of second wavelength reflective units are in a light-transmitting state, and the plurality of first wavelength reflective units and the plurality of third wavelength reflective units are in a reflective state, and the plurality of photosensitive elements receive incident light of green wavelength; during a third preset time period, the plurality of third wavelength reflective units are in a light-transmitting state, and the plurality of first wavelength reflective units and the plurality of second wavelength reflective units are in a reflective state, and the plurality of photosensitive elements receive incident light of blue wavelength.

[0009] Optionally, each of the first wavelength reflection unit, the second wavelength reflection unit, and the third wavelength reflection unit is controlled independently; each of the first wavelength reflection units further includes a first edge-sealing adhesive for encapsulating the red cholesterol-type liquid crystal; each of the second wavelength reflection units further includes a second edge-sealing adhesive for encapsulating the green cholesterol-type liquid crystal; each of the third wavelength reflection units further includes a third edge-sealing adhesive for encapsulating the blue cholesterol-type liquid crystal; four adjacent filter units form a pixel, and within a pixel, within the preset time period, one of the four filter units transmits red wavelength light, one filter unit transmits blue wavelength light, and two filter units transmit green wavelength light.

[0010] Optionally, each of the filter units transmits light at a red wavelength once, twice at a green wavelength, and once at a blue wavelength during four consecutive preset time periods.

[0011] This application also discloses a control method for an image sensor, wherein the image sensor is the image sensor described above, and the control method includes the following steps: Within a preset time, control two of the three wavelength reflection units (first wavelength reflection unit, second wavelength reflection unit, and third wavelength reflection unit) of each filter unit to be in a reflective state and one to be in a transparent state. Each photosensitive element receives incident light of one of three wavelengths—a first wavelength, a second wavelength, and a third wavelength—within the preset time period; The first wavelength reflection unit is used to reflect incident light of a first wavelength when in a reflection state; the second wavelength reflection unit is used to reflect incident light of a second wavelength when in a reflection state; and the third wavelength reflection unit is used to reflect incident light of a third wavelength when in a reflection state.

[0012] Optionally, the step of controlling two of the three wavelength reflection units (first wavelength reflection unit, second wavelength reflection unit, and third wavelength reflection unit) of each filter unit to be in a reflective state and one to be in a transparent state within a preset time includes the following steps: During a first preset time period, multiple first wavelength reflection units are in a light-transmitting state, while multiple second wavelength reflection units and multiple third wavelength reflection units are in a reflective state; During a second preset time period, multiple second-wavelength reflective units are in a transparent state, while multiple first-wavelength reflective units and multiple third-wavelength reflective units are in a reflective state. During a third preset time period, multiple third wavelength reflection units are in a light-transmitting state, while multiple first wavelength reflection units and multiple second wavelength reflection units are in a reflective state; The step of each photosensitive element receiving incident light of one of the three wavelengths (first wavelength, second wavelength, and third wavelength) within the preset time period includes the following steps: The plurality of photosensitive elements receive incident light of red wavelength within the first preset time period; The plurality of photosensitive elements receive incident light of green wavelength within the second preset time period; The plurality of photosensitive elements receive incident light of blue wavelength during the third preset time period; Among them, the first preset time, the second preset time, and the third preset time are three consecutive preset time periods.

[0013] This application also discloses an electronic device, including the image sensor described above.

[0014] This application also discloses a display device, including a display panel and an image sensor disposed on the display panel, wherein the image sensor is the image sensor described above.

[0015] This application stacks a first wavelength reflection unit, a second wavelength reflection unit, and a third wavelength reflection unit, utilizing their different wavelength reflection functions to ensure that the photosensitive element can only receive one of these three wavelengths of light at any given time, avoiding interference from other wavelengths when receiving a specific wavelength of light. Simultaneously, by sequentially controlling the first, second, and third wavelength reflection units, the first, second, and third wavelengths of light enter the photosensitive element in a time-division manner, allowing each photosensitive element to receive all three wavelengths of light in a time-divisional domain. Subsequent algorithms then identify the actual color and light intensity of each sub-pixel. Compared to exemplary technologies that can only receive light of one basic color, this application achieves higher light utilization, especially in low-light conditions, offering advantages such as reduced noise and improved image quality. Attached Figure Description

[0016] The accompanying drawings, which form part of the specification, are used to provide a further understanding of the embodiments of this application and illustrate the implementation methods of this application, together with the textual description, to explain the principles of this application. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings: Figure 1 This is a cross-sectional schematic diagram of the image sensor according to the first embodiment of this application; Figure 2 This is a cross-sectional schematic diagram of the filter unit according to the first embodiment of this application; Figure 3a This is a schematic diagram of the operation of the image sensor at the first preset time according to the first embodiment of this application; Figure 3b This is a schematic diagram of the second preset time operation of the image sensor according to the first embodiment of this application; Figure 3c This is a schematic diagram of the operation of the image sensor at the third preset time according to the first embodiment of this application; Figure 4 This is a schematic diagram of the steps of the control method of the image sensor according to the first embodiment of this application; Figure 5 This is a schematic diagram of an image sensor according to a second embodiment of this application; Figure 6 This is a schematic diagram of the filter unit according to the second embodiment of this application; Figure 7a This is a schematic diagram of the pixel arrangement in the second embodiment of this application at a first preset time. Figure 7bThis is a schematic diagram of the pixel arrangement in the second embodiment of this application at a second preset time. Figure 7c This is a schematic diagram of the pixel arrangement in the third preset time according to the second embodiment of this application; Figure 7d This is a schematic diagram of the pixel arrangement in the fourth preset time according to the second embodiment of this application; Figure 8 This is a schematic diagram of the electronic device of this application; Figure 9 This is a schematic diagram of the display device of this application.

[0017] Among them, 100 is an image sensor; 110 is a photosensitive element layer; 111 is a photosensitive element; 120 is a color filter array; 121 is a filter unit; R is a red sub-pixel; G is a green sub-pixel; B is a blue sub-pixel; 130 is a first wavelength reflection unit; 131 is a first electrode; 132 is a red cholesterol liquid crystal; 133 is a second electrode; 134 is a first edge sealant; 140 is a second wavelength reflection unit; 141 is a third electrode; 142 is a third electrode. 143. Green cholesterol-type liquid crystal; 144. Fourth electrode; 145. Second edge sealant; 156. Third wavelength reflection unit; 157. Fifth electrode; 158. Blue cholesterol-type liquid crystal; 159. Sixth electrode; 150. Third edge sealant; 161. Encapsulation substrate; 162. First alignment film; 163. Second alignment film; 170. Edge sealant; 200. Pixel; 200. Electronic device; 300. Display device; 310. Display panel. Detailed Implementation

[0018] It should be understood that the terminology, specific structural and functional details used herein are merely for describing particular embodiments and are representative. However, this application may be implemented in many alternative forms and should not be construed as being limited to the embodiments set forth herein.

[0019] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or implying the number of technical features indicated. Therefore, unless otherwise stated, a feature specified as "first" or "second" may explicitly or implicitly include one or more of that feature; "multiple" means two or more. Furthermore, terms such as "upper," "lower," "left," "right," "vertical," and "horizontal," indicating orientation or positional relationships, are based on the orientation or relative positional relationships shown in the accompanying drawings and are only for the purpose of simplifying the description of this application, not indicating that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0020] The present application will now be described in detail with reference to the accompanying drawings and optional embodiments.

[0021] Figure 1 This is a cross-sectional schematic diagram of the image sensor according to the first embodiment of this application. Figure 2 This is a cross-sectional schematic diagram of the filter unit according to the first embodiment of this application, see [link / reference]. Figures 1 to 2 As shown, this application discloses an image sensor 100, which includes a photosensitive element layer 110 and a color filter array 120. The photosensitive element layer 110 includes a plurality of photosensitive elements 111 arranged in an array, and each photosensitive element 111 includes a photosensitive sub-pixel. The color filter array 120 is disposed above the photosensitive element layer 110 and includes a plurality of filter units 121 arranged in an array, and the plurality of filter units 121 are respectively disposed corresponding to the plurality of photosensitive elements 111. Each filter unit 121 includes a first wavelength reflection unit 130, a second wavelength reflection unit 140, and a third wavelength reflection unit 150. The first wavelength reflection unit 130 is disposed on the photosensitive element, the second wavelength reflection unit 140 is disposed on the first wavelength reflection unit 130, and the third wavelength reflection unit 150 is disposed on the second wavelength reflection unit 140.

[0022] The first wavelength reflection unit 130 is used to reflect incident light of a first wavelength when in a reflection state; the second wavelength reflection unit 140 is used to reflect incident light of a second wavelength when in a reflection state; the third wavelength reflection unit 150 is used to reflect incident light of a third wavelength when in a reflection state; the same photosensitive element 111 is used to receive incident light of one of the three wavelengths (first, second, and third wavelengths) within a preset time period. The first, second, and third wavelength reflection units each include a cholesterol-type liquid crystal and an electrode controlling the cholesterol-type liquid crystal, and are in a reflection state under the control of the corresponding electrode.

[0023] This application stacks a first wavelength reflection unit 130, a second wavelength reflection unit 140, and a third wavelength reflection unit 150, utilizing their different wavelength reflection functions to ensure that the photosensitive element 111 can only receive one of the three wavelengths of light at any given time. This avoids interference from other wavelengths when the photosensitive element 111 receives light of a specific wavelength. Simultaneously, by sequentially controlling the first wavelength reflection unit 130, the second wavelength reflection unit 140, and the third wavelength reflection unit 150, the first, second, and third wavelengths of light enter the photosensitive element 111 in a time-division manner. This allows each photosensitive element 111 to receive all three wavelengths of light in a time-division domain. Subsequent algorithms then identify the actual color and light intensity of each sub-pixel. Compared to exemplary technologies that can only receive light of one basic color, this application has a higher light utilization rate, especially in low-light conditions, offering advantages such as reduced noise and improved image quality.

[0024] The function of the image sensor 100 is to convert light signals into electrical signals. When light signals reflected by objects or the environment enter the image sensor 100, they are first filtered by the filter unit 121 in the color filter array 120. The photosensitive element 111 receives the filtered light and outputs electrical signals of different intensities according to the intensity of the light. The electrical signals are then output to the processor through the readout circuit. Subsequently, through a series of complex algorithms and optimizations, the image is finally output.

[0025] The first wavelength reflection unit 130, the second wavelength reflection unit 140, and the third wavelength reflection unit 150 utilize cholesteric liquid crystals. Cholesteric liquid crystals, also known as chiral nematic liquid crystals, are "soft" photonic crystals with a periodic helical superstructure. In cholesteric liquid crystals, molecules self-assemble into layers, with molecules within each layer arranged parallel to each other along a certain direction. Molecules between adjacent layers rotate at a certain angle along the normal direction of the layer, forming a periodic helical superstructure. The pitch is a crucial parameter characterizing the helical superstructure of cholesteric liquid crystals, representing the interlayer spacing where the molecular director rotates 360° along the helical axis. The periodic helical superstructure endows cholesteric liquid crystals with unique optical properties; that is, cholesteric liquid crystals can selectively reflect circularly polarized light with the same direction as their helical structure. According to Bragg's law of reflection, λ = np, where n is the average refractive index of the liquid crystal matrix, λ is the reflection wavelength of the cholesteric liquid crystal, and p is the pitch. This law indicates that the reflection wavelength λ is directly related to the pitch p of the helical superstructure.

[0026] In this embodiment, three different colors of cholesterol-type liquid crystals are utilized, employing a three-layer stacked structure of red cholesterol-type liquid crystal 132, green cholesterol-type liquid crystal 142, and blue cholesterol-type liquid crystal 152. This three-layer stacked structure allows red, green, and blue light to selectively pass through, thereby enabling each photosensitive element 111 to receive red, green, and blue light respectively in a time-division manner.

[0027] The first wavelength reflection unit 130 includes a first electrode 131, a red cholesterol liquid crystal 132, and a second electrode 133. The red cholesterol liquid crystal 132 is disposed between the first electrode 131 and the second electrode 133. The red cholesterol liquid crystal 132 is used to switch between a transparent state and a reflective state under the control of the first electrode 131 and the second electrode 133.

[0028] The first wavelength is red light, with a wavelength range of approximately 635 nm. In this embodiment, the red cholesterol-type liquid crystal 132 reflects wavelengths between 620 nm and 650 nm. When the first wavelength reflection unit 130 is in a reflective state, the red light of the first wavelength is reflected by the first wavelength reflection unit 130, but other wavelengths, such as the second and third wavelengths, can pass through the first wavelength reflection unit 130 smoothly. When the first wavelength reflection unit 130 is in a transparent state, all wavelengths of light can pass through the first wavelength reflection unit 130.

[0029] The second wavelength reflection unit 140 includes a third electrode 141, a green cholesterol-type liquid crystal 142, and a fourth electrode 143, wherein the green cholesterol-type liquid crystal 142 is disposed between the third electrode 141 and the fourth electrode 143. The green cholesterol-type liquid crystal 142 is used to switch between a transparent state and a reflective state under the control of the third electrode 141 and the fourth electrode 143.

[0030] The second wavelength is green light, with a wavelength range of approximately 530 nm. The green cholesterol-type liquid crystal 142 used in this embodiment reflects wavelengths between 520 nm and 550 nm. When the second wavelength reflecting unit 140 is in a reflective state, the green light of the second wavelength is reflected, but other wavelengths, such as the first and third wavelengths, can pass through it smoothly. When the second wavelength reflecting unit 140 is in a transparent state, all wavelengths of light can pass through it.

[0031] The third wavelength reflection unit 150 includes a fifth electrode 151, a blue cholesterol-type liquid crystal 152, and a sixth electrode 153. The blue cholesterol-type liquid crystal 152 is disposed between the fifth electrode 151 and the sixth electrode 153. The blue cholesterol-type liquid crystal 152 is used to switch between a transparent state and a reflective state under the control of the fifth electrode 151 and the sixth electrode 153.

[0032] Similarly, the third wavelength is blue light, with a wavelength range of approximately 420 nm. The blue cholesterol-type liquid crystal 152 used in this embodiment reflects wavelengths between 410 nm and 430 nm. When the third wavelength reflecting unit 150 is in a reflective state, the blue light of the third wavelength is reflected by the third wavelength reflecting unit 150, but other wavelengths, such as the first and second wavelengths, can pass through the third wavelength reflecting unit 150 smoothly. When the third wavelength reflecting unit 150 is in a transparent state, all wavelengths of light can pass through the third wavelength reflecting unit 150.

[0033] Specifically, within the preset time period, only one of the first wavelength reflection unit 130, the second wavelength reflection unit 140, and the third wavelength reflection unit 150 is in a light-transmitting state.

[0034] For example, when red light needs to be absorbed by the photosensitive element 111, the second wavelength reflection unit 140 and the third wavelength reflection unit 150 in the filter unit 121 need to be controlled to be in a reflective state, while the first wavelength reflection unit 130 needs to be in a transparent state. By reflecting green and blue wavelength light, red light can pass through. Similarly, when green light can pass through, the first wavelength reflection unit 130 and the third wavelength reflection unit 150 need to be in a reflective state, while the second wavelength reflection unit 140 needs to be in a transparent state. When blue light needs to pass through, the first wavelength reflection unit 130 and the second wavelength reflection unit 140 need to be in a reflective state, while the third wavelength reflection unit 150 needs to be in a transparent state.

[0035] It is understandable that, taking the first wavelength reflection unit 130 as an example, when the first wavelength reflection unit 130 is in a reflective state, it can reflect light of the first wavelength, while light of other wavelengths can pass through smoothly. When the first wavelength reflection unit 130 is in a transparent state, light of the first wavelength can also pass through.

[0036] Taking the first wavelength reflection unit 130 as an example, the specific control method is explained. Its cholesteric liquid crystal can be made of polymer-stabilized cholesteric phase (PSCLC) material. By adding a small amount of polymer monomers, a polymer network is formed after ultraviolet curing, fixing the basic morphology of the helical structure while retaining its electric field responsiveness. An AC electric field of 0V to 5V with a frequency of 50Hz to 1000Hz can be applied to the first electrode 131 and the second electrode 133. By continuously adjusting the pitch p by changing the voltage amplitude, the reflection wavelength can be continuously varied within the visible light range (first wavelength, second wavelength, and third wavelength range). The advantage of this material is that different wavelengths of reflection can be achieved by adjusting the voltage. The first wavelength reflection unit 130, the second wavelength reflection unit 140, and the third wavelength reflection unit 150 achieve different wavelength reflections through voltage regulation. It can also employ pulse voltage regulation, which allows for rapid switching. For example, by using a short-pulse electric field (pulse width approximately 1 ms to 10 ms) to drive cholesterol-type liquid crystals, and adjusting the pitch p by controlling the amplitude and duration of the pulse voltage, reflections of different wavelengths can be achieved. This avoids excessive power consumption and material aging caused by prolonged voltage application. In another approach, cholesterol-type liquid crystals with different doping materials can be used to achieve red cholesterol-type liquid crystal 132, green cholesterol-type liquid crystal 142, and blue cholesterol-type liquid crystal 152 with different reflection wavelengths.

[0037] An encapsulation substrate 160 is disposed between the first wavelength reflective unit 130 and the second wavelength reflective unit 140, and an encapsulation substrate 160 is also disposed on the side of the first wavelength reflective unit 130 away from the second wavelength reflective unit 140. The encapsulation substrate 160 enables the red cholesterol-type liquid crystal 132 to be cell-assembled. Similarly, an encapsulation substrate 160 is disposed between the second wavelength reflective unit 140 and the third wavelength reflective unit 150, and the encapsulation substrates 160 on both sides of the second wavelength reflective unit 140 enable the green cholesterol-type liquid crystal 142 to be cell-assembled. An encapsulation substrate 160 is disposed on the side of the third wavelength reflective unit 150 away from the second wavelength reflective unit 140, and the encapsulation substrates 160 on both sides of the third wavelength reflective unit 150 enable the blue cholesterol-type liquid crystal 152 to be cell-assembled. The encapsulation substrate 160 can be an organic substrate or a glass substrate, etc., and its main function is to separate the different layers of cholesterol-type liquid crystals and to insulate the control electrodes of different wavelength reflective units.

[0038] It is understood that the stacking order of the first wavelength reflection unit 130, the second wavelength reflection unit 140, and the third wavelength reflection unit 150 in this application is not limited. In practical applications, the first wavelength reflection unit 130 can be placed between the second wavelength reflection unit 140 and the third wavelength reflection unit 150, or the third wavelength reflection unit 150 can be placed between the first wavelength reflection unit 130 and the second wavelength reflection unit 140. This application only illustrates an example where the first wavelength reflection unit 130 is placed at the bottom, and the second wavelength reflection unit 140 and the third wavelength reflection unit 150 are stacked in one order.

[0039] In one embodiment, among the plurality of first wavelength reflective units 130, the plurality of first electrodes 131 are interconnected, and the plurality of second electrodes 133 are interconnected. The red cholesterol-type liquid crystals 132 within the plurality of first wavelength reflective units 130 disposed on the same layer are all encapsulated together to form a single-layer encapsulation. An edge-sealing adhesive 163 is also disposed between the encapsulation substrates 160 on both sides of the red cholesterol-type liquid crystals 132, surrounding all the red cholesterol-type liquid crystals 132, thereby encapsulating the cholesterol-type liquid crystals together in a single layer.

[0040] In the plurality of second wavelength reflective units 140, the plurality of third electrodes 141 are interconnected, and the plurality of fourth electrodes 143 are interconnected. The green cholesterol liquid crystal 142 in the plurality of second wavelength reflective units 140 disposed in the same layer are encapsulated together by edge sealing adhesive 163 to form a whole layer encapsulation.

[0041] In the plurality of third wavelength reflective units 150, the plurality of fifth electrodes 151 are interconnected, and the plurality of sixth electrodes 153 are interconnected; the blue cholesterol liquid crystal 152 in the plurality of third wavelength reflective units 150 disposed on the same layer is encapsulated together by edge sealing adhesive 163 to form a whole layer encapsulation.

[0042] In this embodiment, the cholesterol-type liquid crystals within the multiple wavelength reflective units of each layer are encapsulated as a single layer, resulting in good encapsulation performance and a relatively simple manufacturing process. Compared to encapsulating the cholesterol-type liquid crystal of each wavelength reflective unit individually, this overall encapsulation is easier to implement in terms of process, has lower costs, and provides better encapsulation performance. More importantly, it allows the cholesterol-type liquid crystals in the same layer to be controlled as a whole, reducing the complexity of the control circuit. Of course, a spacing structure can also be set between different wavelength reflective units to allow the liquid crystal of each wavelength reflective unit to be encapsulated in a separate cell.

[0043] Figure 3a This is a schematic diagram of the operation of the image sensor of the first embodiment of this application at the first preset time. Figure 3bThis is a schematic diagram of the second preset time operation of the image sensor according to the first embodiment of this application. Figure 3c This is a schematic diagram of the operation of the image sensor of the first embodiment of this application at the third preset time. See also: Figures 3a to 3c As shown, in the first wavelength reflection unit 130, the first electrode 131 and the second electrode 133 can be arranged on an entire surface, without the need for patterning design for each filter unit 121, thus achieving unified power supply and allowing the red cholesterol liquid crystal 132 at multiple locations to be in either a transparent or reflective state simultaneously. Similarly, the third and fourth electrodes in the second wavelength reflection unit of each layer can also be arranged on an entire surface, and the fifth and sixth electrodes in the third wavelength reflection unit of the same layer can also be arranged on an entire surface.

[0044] See Figure 3a As shown, during the first preset time period, multiple first wavelength reflection units 130 are in the light-transmitting state, multiple second wavelength reflection units 140 and multiple third wavelength reflection units 150 are in the reflection state, and multiple photosensitive elements 111 receive incident light of red wavelength. See Figure 3b As shown, during the second preset time period, multiple second wavelength reflection units 140 are in the light-transmitting state, multiple first wavelength reflection units 130 and multiple third wavelength reflection units 150 are in the reflection state, and multiple photosensitive elements 111 receive incident light of green wavelength. See Figure 3c As shown, during the third preset time period, the plurality of third wavelength reflection units 150 are in the light-transmitting state, the plurality of first wavelength reflection units 130 and the plurality of second wavelength reflection units 140 are in the reflection state, and the plurality of photosensitive elements 111 receive incident light of blue wavelength.

[0045] In a specific embodiment, each wavelength reflection unit generally has an alignment film disposed on both sides of the cholesteric liquid crystal. For example, in the first wavelength reflection unit 130, a first alignment film 161 is disposed between the first electrode 131 and the red cholesteric liquid crystal 132, and a second alignment film 162 is disposed between the second electrode 133 and the red cholesteric liquid crystal 132. The first alignment film 161 and the second alignment film 162 are used to control the twisting state of the liquid crystal molecules, so that the molecules on its surface can only be arranged regularly in a certain direction. The first alignment film 161 can be formed of polyimide film or other materials, which are not limited here. The second wavelength reflection unit 140 and the third wavelength reflection unit 150 are similar to the first wavelength reflection unit 130, and are also provided with the first alignment film 161 and the second alignment film 162, respectively, which will not be described in detail here. Wherein, when the shutter refresh rate of the image sensor is 60Hz, the first, second and third preset times are less than or equal to one-third of the refresh time.

[0046] Figure 4 This is a schematic diagram of the steps of the control method for the image sensor according to the first embodiment of this application. See also... Figure 4 As shown, this application also discloses a control method for an image sensor 100, including the following steps: S100: Within a preset time, control two of the three wavelength reflection units (first wavelength reflection unit, second wavelength reflection unit, and third wavelength reflection unit) of each filter unit to be in a reflective state and one to be in a transparent state. S200: Each photosensitive element receives incident light of one of the three wavelengths—a first wavelength, a second wavelength, and a third wavelength—within the preset time period; The first wavelength reflection unit 130 is used to reflect incident light of a first wavelength when in a reflection state; the second wavelength reflection unit 140 is used to reflect incident light of a second wavelength when in a reflection state; and the third wavelength reflection unit 150 is used to reflect incident light of a third wavelength when in a reflection state.

[0047] Specifically, the steps in S100 include: S101: During a first preset time period, multiple first wavelength reflection units are in a light-transmitting state, and multiple second wavelength reflection units and multiple third wavelength reflection units are in a reflective state; S102: During a second preset time period, multiple second wavelength reflection units are in a light-transmitting state, and multiple first wavelength reflection units and multiple third wavelength reflection units are in a reflective state; S103: During the third preset time period, the plurality of third wavelength reflection units are in the light-transmitting state, and the plurality of first wavelength reflection units and the plurality of second wavelength reflection units are in the reflection state; The steps in S200 include: S201: The plurality of photosensitive elements receive incident light of red wavelength within the first preset time period; S202: The plurality of photosensitive elements receive incident light of green wavelength within the second preset time period; S203: The plurality of photosensitive elements receive incident light of blue wavelength during the third preset time period.

[0048] In this embodiment, the red cholesteric liquid crystal 132 in the multiple first wavelength reflection units 130 arranged on the same layer, the green cholesteric liquid crystal 142 in the multiple second wavelength reflection units 140 arranged on the same layer, and the blue cholesteric liquid crystal 152 in the multiple third wavelength reflection units 150 arranged on the same layer are respectively encapsulated, and the whole layer can be driven and controlled in steps S101, S102, and S103.

[0049] Figure 5This is a schematic diagram of the image sensor according to the second embodiment of this application. Figure 6 This is a schematic diagram of the filter unit according to the second embodiment of this application, see below. Figures 5 to 6 As shown, this application also discloses another image sensor 100, the difference being that each wavelength reflection unit is separately packaged, and the other structures are the same as those in Embodiment 1 above, and will not be described again here.

[0050] In this embodiment, each wavelength reflection unit can be individually packaged or individually controlled.

[0051] In each of the three layers of wavelength reflection units stacked in each filter unit 121, each first wavelength reflection unit 130 further includes a first edge sealant 134 for encapsulating the red cholesterol-type liquid crystal 132. Each second wavelength reflection unit 140 further includes a second edge sealant 144 for encapsulating the green cholesterol-type liquid crystal 142. Each third wavelength reflection unit 150 further includes a third edge sealant 154 for encapsulating the blue cholesterol-type liquid crystal 152.

[0052] It is understood that this individual encapsulation only separates the cholesteric liquid crystals in adjacent filter units 121 using edge-sealing adhesive 163, while the encapsulation substrate 160 is still shared. The minimum area of ​​this individual encapsulation can be equal to the area of ​​a single sub-pixel; of course, the size of a single filter unit 121 can be appropriately increased, i.e., the area of ​​the individual sub-pixel can be increased to reduce manufacturing complexity. It is understood that this sub-pixel is the aforementioned photosensitive sub-pixel, with one photosensitive element 111 and one filter unit 121 corresponding to each sub-pixel.

[0053] Figure 7a This is a schematic diagram of the pixel arrangement in the second embodiment of this application at a first preset time. Figure 7b This is a schematic diagram of the pixel arrangement in the second embodiment of this application at a second preset time. Figure 7c This is a schematic diagram of the pixel arrangement in the second embodiment of this application at a third preset time. Figure 7d This is a schematic diagram of the pixel arrangement in the second embodiment of this application at a fourth preset time. See also... Figures 5 to 7d As shown, four adjacent filter units 121 form a pixel 170. Within a pixel 170, within the preset time period, one of the four filter units 121 is used to transmit light of red wavelength, one of the filter units 121 is used to transmit light of blue wavelength, and two of the filter units 121 are used to transmit light of green wavelength.

[0054] This embodiment achieves the following by individually controlling the states of the first wavelength reflection unit 130, the second wavelength reflection unit 140, and the third wavelength reflection unit 150 in the four filter units 121 within a pixel 170: red light from one sub-pixel region, blue light from one sub-pixel region, and green light from two sub-pixel regions within a preset time.

[0055] In step S100, the control method requires controlling each filter unit 121 within each pixel 170. Specifically, within a pixel 170, the first wavelength reflection unit 130 of one filter unit 121 is controlled to be in a transparent state, while the second wavelength reflection unit 140 and the third wavelength reflection unit 150 are in a reflective state, allowing the filter unit 121 to transmit red light. In another filter unit 121 within the same pixel 170, the third wavelength reflection unit 150 is controlled to be in a transparent state, while the first wavelength reflection unit 130 and the second wavelength reflection unit 140 are in a reflective state, allowing the filter unit 121 to transmit blue light. In the remaining two filter units 121 within the same pixel 170, the second wavelength reflection unit 140 is controlled to be in a transparent state, while the first wavelength reflection unit 130 and the third wavelength reflection unit 150 are in a reflective state, allowing both filter units 121 to transmit green light.

[0056] In this embodiment, by individually controlling each filter unit 121, different colors of light can be selectively filtered, allowing red, green, green, and blue light to be received within a single pixel 170, thus forming a Bayer color filter array 120 arrangement. A single pixel 170 in this Bayer color filter array 120 typically contains red, green, and blue light arranged in a 1:2:1 ratio. Using "R" as the red sub-pixel, "G" as the green sub-pixel, and "B" as the blue sub-pixel, the arrangement of the smallest repeating unit in the color filter array 120 can be "RGGB", "RGBG", "GRGB", etc. This embodiment can control the four filter units 121 within a single pixel 170 to output red, green, green, and blue light within a preset time period.

[0057] Of course, this embodiment is also applicable to a scheme in which three or five sub-pixels form a pixel 170. This can be achieved by adjusting the transmitted light of different filter units 121 within a pixel 170, which will not be elaborated here.

[0058] Furthermore, based on the above embodiments, a time domain is superimposed, such that within four consecutive preset time periods, a filter unit 121 within a pixel 170 can transmit four colors of light: red, green, green, and blue, respectively, without being limited to the order of red-green-green-blue. When the four sub-pixels are red-green-green-blue within a preset time period, each sub-pixel transmits light in an order not limited to red-green-green-blue within the four consecutive preset time periods. It is understood that in this embodiment, one sub-pixel equals one filter unit 121.

[0059] See Figure 7a As shown, in the first preset time period of four consecutive preset times, the first sub-pixel transmits red light, the second sub-pixel transmits green light, the third sub-pixel transmits green light, and the fourth sub-pixel transmits blue light, that is, the order from left to right and from top to bottom is red, green, green, and blue.

[0060] See Figure 7b As shown, in the second preset time period of four consecutive preset times, the first sub-pixel transmits blue light, the second sub-pixel transmits green light, the third sub-pixel transmits green light, and the fourth sub-pixel transmits red light, that is, the order from left to right and from top to bottom is blue-green-green-red.

[0061] See Figure 7c As shown, in the third preset time period out of four consecutive preset times, the first sub-pixel transmits green light, the second sub-pixel transmits red light, the third sub-pixel transmits blue light, and the fourth sub-pixel transmits green light, that is, the order from left to right and from top to bottom is green-red-blue-green.

[0062] See Figure 7d As shown, in the fourth preset time period out of four consecutive preset time periods, the first sub-pixel transmits green light, the second sub-pixel transmits blue light, the third sub-pixel transmits red light, and the fourth sub-pixel transmits green light. That is, the order from left to right and from top to bottom is green, blue, red, green.

[0063] In this scheme, pixel 170 not only outputs red, green, green, and blue light within each preset time period, but also, in the temporal domain, each sub-pixel outputs red, green, green, and blue light. By directly obtaining the red, green, and blue color values ​​of each sub-pixel in the temporal domain, the color values ​​of the complete pixel 170 can be compared and calibrated, thereby improving the accuracy of the reconstructed color image. This embodiment avoids the problem in the exemplary Bayer color filter array 120 where the mosaic algorithm allows each sub-pixel to receive only one color of light, resulting in significant light loss. This improves the utilization rate of light, especially in low-light environments, reducing noise and improving image quality.

[0064] The specific control method includes controlling the first wavelength reflection unit 130 of the first sub-pixel to be in a transparent state and the second wavelength reflection unit 140 and the third wavelength reflection unit 150 to be in a reflective state during a consecutive first preset time period. Similarly, controlling the second wavelength reflection unit 140 of the second and third sub-pixels to be in a transparent state and the first wavelength reflection unit 130 and the third wavelength reflection unit 150 to be in a reflective state during the same first and third preset time periods. The third wavelength reflection unit 150 of the fourth sub-pixel to be in a transparent state and the first wavelength reflection unit 130 and the second wavelength reflection unit 140 to be in a reflective state during the same fourth sub-pixel. This process continues, controlling the wavelength reflection units at different positions during four consecutive preset time periods to achieve the above embodiment, which will not be elaborated further here.

[0065] In another embodiment, whole-layer control is achieved by making the arrangement order of the first wavelength reflection unit 130, the second wavelength reflection unit 140 and the third wavelength reflection unit 150 of each filter unit 121 different.

[0066] Taking a pixel 170 with four adjacent filter units 121 as an example (two adjacent filter units are regarded as one sub-pixel as green sub-pixels, and their area is equal to the area of ​​the two filter units), when the pixel 170 needs to satisfy the three colors of light (red, green and blue) in a preset time period, each sub-pixel in the pixel 170 transmits the three colors of light (red, green and blue) in three consecutive preset time periods.

[0067] For example, the filter unit 121 corresponding to the first sub-pixel within pixel 170 consists of, from bottom to top, a first wavelength reflection unit 130, a second wavelength reflection unit 140, and a third wavelength reflection unit 150. The filter unit 121 corresponding to the second sub-pixel within pixel 170 consists of, from bottom to top, a second wavelength reflection unit 140, a third wavelength reflection unit 150, and a first wavelength reflection unit 130. The filter unit 121 corresponding to the third sub-pixel within pixel 170 consists of, from bottom to top, a third wavelength reflection unit 150, a first wavelength reflection unit 130, and a second wavelength reflection unit 140.

[0068] In one embodiment, the first wavelength reflection unit, the second wavelength reflection unit, and the third wavelength reflection unit in the filter unit corresponding to the first sub-pixel in each pixel have the same stacking order and are interconnected. The second and third sub-pixels in each pixel are also set to have the same stacking order and are interconnected, thereby achieving unified control of sub-pixels with the same stacking order in each pixel, thereby reducing the complexity of the control circuit.

[0069] In another embodiment, when using cholesteric liquid crystals with different doping materials to achieve red cholesteric liquid crystal 132, green cholesteric liquid crystal 142, and blue cholesteric liquid crystal 152 having different reflection wavelengths, during a first preset time period, the first wavelength reflection unit 130 of the first filter unit 121, the second wavelength reflection unit 140 of the second filter unit 121, and the third wavelength reflection unit 150 of the third filter unit 121, all disposed in the bottommost layer, are in a transparent state, thereby achieving the output light being red, green, and blue during the first preset time period. At this time, in a pixel 170, the first wavelength reflection unit 130, the second wavelength reflection unit 140, and the third wavelength reflection unit 150 of the bottommost layer can be synchronously controlled to be in a transparent state respectively. The first electrode 131 of the first wavelength reflection unit 130, the third electrode 141 of the second wavelength reflection unit 140, and the fifth electrode 151 of the third wavelength reflection unit 150, corresponding to the same layer, are interconnected. The second electrode 133 of the first wavelength reflection unit 130, the fourth electrode 143 of the second wavelength reflection unit 140, and the sixth electrode 153 of the third wavelength reflection unit 150 in the same layer are interconnected. Similarly, the second wavelength reflection unit 140 of the first filter unit 121, the third wavelength reflection unit 150 of the second filter unit 121, and the first wavelength reflection unit 130 of the third filter unit 121 in the middle layer are all in a reflective state, and these three can also be synchronously controlled to achieve electrode connection. The third wavelength reflection unit 150 of the first filter unit 121, the first wavelength reflection unit 130 of the second filter unit 121, and the second wavelength reflection unit 140 of the third filter unit 121 in the top layer are all in a reflective state, and these three can also be synchronously controlled to achieve electrode connection.

[0070] From the perspective of all pixels 170, the settings can be configured according to the aforementioned minimum repeating unit, thereby enabling synchronous control of all wavelength reflection units in each layer. This connects the electrodes corresponding to all wavelength reflection units in each layer, reducing the complexity of the driving circuit. Specifically, in the previous embodiment, when each wavelength reflection unit needed to be controlled individually, a driving transistor was required for each wavelength reflection unit to achieve individual control, resulting in high circuit complexity and cost. In this embodiment, the structural design reduces the complexity of the driving circuit and lowers the driving cost.

[0071] It is understandable that when a pixel 170 includes four adjacent filter units 121, the above design can also be adopted. By shuffling the arrangement order of the wavelength reflection units of different sub-pixels, the unified control of the wavelength reflection units of the entire layer can be achieved. The specific design can be carried out according to the actual situation.

[0072] Figure 8 This is a schematic diagram of the electronic device of this application, see [link / reference]. Figure 8 As shown, this application discloses an electronic device 200, which includes an image sensor 100 in any of the above embodiments.

[0073] Figure 9 This is a schematic diagram of the display device of this application, see [link / reference]. Figure 9 As shown, this application also discloses a display device 300, which includes a display panel 310 and an image sensor 100 disposed on the display panel. The image sensor 100 includes the image sensor 100 in any of the above embodiments.

[0074] The display panel 310 in this embodiment is a display panel with a built-in image sensor 100, which can be used for taking pictures, videos, face recognition, or fingerprint recognition, etc.

[0075] In one specific embodiment, the display panel includes a punch-hole area, within which an image sensor 100 is disposed for detecting external light and can be used for taking photos, videos, facial recognition, or fingerprint recognition, etc. In this embodiment, the photosensitive element and color filter array can be disposed on the substrate of the punch-hole area, thereby achieving deep integration with the display panel.

[0076] It should be noted that the inventive concept of this application can form many embodiments, but due to the limited space of the application documents, they cannot all be listed. Therefore, without conflict, the embodiments described above or the technical features can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effect will be enhanced.

[0077] The above description, in conjunction with specific optional embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.

Claims

1. An image sensor, characterized in that, include: A photosensitive element layer, the photosensitive element layer comprising a plurality of photosensitive elements arranged in an array, each photosensitive element comprising a photosensitive sub-pixel; as well as A color filter array is disposed above the photosensitive element layer, comprising multiple filter units arranged in an array, each filter unit corresponding to a multiple photosensitive element; Each of the filtering units includes a first wavelength reflection unit, a second wavelength reflection unit, and a third wavelength reflection unit. The first wavelength reflection unit is disposed on the photosensitive element, the second wavelength reflection unit is disposed on the first wavelength reflection unit, and the third wavelength reflection unit is disposed on the second wavelength reflection unit. The first wavelength reflection unit is used to reflect incident light of a first wavelength when it is in a reflection state; The second wavelength reflecting unit is used to reflect the incident light of the second wavelength when it is in the reflecting state; The third wavelength reflection unit is used to reflect the incident light of the third wavelength when it is in the reflection state; Within a preset time period, the same photosensitive element is used to receive incident light of one of the three wavelengths: a first wavelength, a second wavelength, and a third wavelength. The first wavelength reflection unit, the second wavelength reflection unit, and the third wavelength reflection unit each include a cholesterol-type liquid crystal and an electrode that controls the cholesterol-type liquid crystal, and are in a reflective state under the control of the corresponding electrode.

2. The image sensor according to claim 1, characterized in that, The first wavelength is a red wavelength, the second wavelength is a green wavelength, and the third wavelength is a blue wavelength.

3. The image sensor according to claim 2, characterized in that, The first wavelength reflection unit includes a first electrode, a red cholesterol-type liquid crystal, and a second electrode, wherein the red cholesterol-type liquid crystal is disposed between the first electrode and the second electrode; The red cholesterol-type liquid crystal is used to switch between a transparent state and a reflective state under the control of the first electrode and the second electrode; The second wavelength reflection unit includes a third electrode, a green cholesterol liquid crystal, and a fourth electrode, wherein the green cholesterol liquid crystal is disposed between the third electrode and the fourth electrode; The green cholesterol-type liquid crystal is used to switch between a transparent state and a reflective state under the control of the third electrode and the fourth electrode; The third wavelength reflection unit includes a fifth electrode, a blue cholesterol-type liquid crystal, and a sixth electrode, wherein the blue cholesterol-type liquid crystal is disposed between the fifth electrode and the sixth electrode. The blue cholesterol-type liquid crystal is used to switch between a transparent state and a reflective state under the control of the fifth electrode and the sixth electrode; During the preset time period, only one of the first wavelength reflection unit, the second wavelength reflection unit, and the third wavelength reflection unit is in a light-transmitting state.

4. The image sensor according to claim 3, characterized in that, In the plurality of first wavelength reflection units, the plurality of first electrodes are interconnected, and the plurality of second electrodes are interconnected; In the plurality of second wavelength reflection units, the plurality of third electrodes are interconnected, and the plurality of fourth electrodes are interconnected; In the plurality of third wavelength reflection units, the plurality of fifth electrodes are interconnected, and the plurality of sixth electrodes are interconnected; During a first preset time period, multiple first wavelength reflective units are in a light-transmitting state, multiple second wavelength reflective units and multiple third wavelength reflective units are in a reflective state, and multiple photosensitive elements receive incident light of red wavelength; During a second preset time period, multiple second wavelength reflective units are in a light-transmitting state, multiple first wavelength reflective units and multiple third wavelength reflective units are in a reflective state, and multiple photosensitive elements receive incident light of green wavelength; During a third preset time period, multiple third wavelength reflective units are in a light-transmitting state, multiple first wavelength reflective units and multiple second wavelength reflective units are in a reflective state, and multiple photosensitive elements receive incident light of blue wavelength.

5. The image sensor according to claim 3, characterized in that, Each of the first wavelength reflection unit, the second wavelength reflection unit, and the third wavelength reflection unit is controlled independently. Each of the first wavelength reflective units further includes a first edge sealant, which is used to encapsulate the red cholesterol-type liquid crystal; Each of the second wavelength reflective units further includes a second sealing adhesive, which is used to encapsulate the green cholesterol-type liquid crystal; Each of the third wavelength reflective units further includes a third sealing adhesive, which is used to encapsulate the blue cholesterol-type liquid crystal; Four adjacent filter units form a pixel. Within a pixel, within a preset time period, one of the four filter units is used to transmit light of red wavelength, one filter unit is used to transmit light of blue wavelength, and two filter units are used to transmit light of green wavelength.

6. The image sensor according to claim 5, characterized in that, During four consecutive preset time periods, each of the filter units transmits light at one red wavelength, two green wavelengths, and one blue wavelength.

7. A control method for an image sensor, characterized in that, The image sensor is the image sensor as described in any one of claims 1 to 6, and the control method includes the following steps: Within a preset time, control two of the three wavelength reflection units (first wavelength reflection unit, second wavelength reflection unit, and third wavelength reflection unit) of each filter unit to be in a reflective state and one to be in a transparent state. Each photosensitive element receives incident light of one of three wavelengths—a first wavelength, a second wavelength, and a third wavelength—within the preset time period; The first wavelength reflection unit is used to reflect incident light of a first wavelength when in a reflection state; the second wavelength reflection unit is used to reflect incident light of a second wavelength when in a reflection state; and the third wavelength reflection unit is used to reflect incident light of a third wavelength when in a reflection state.

8. The control method for an image sensor according to claim 7, characterized in that, The step of controlling two of the three wavelength reflection units (first wavelength reflection unit, second wavelength reflection unit, and third wavelength reflection unit) of each filter unit to be in a reflective state and one to be in a transparent state within a preset time includes the following steps: During a first preset time period, multiple first wavelength reflection units are in a light-transmitting state, while multiple second wavelength reflection units and multiple third wavelength reflection units are in a reflective state; During a second preset time period, multiple second wavelength reflection units are in a light-transmitting state, while multiple first wavelength reflection units and multiple third wavelength reflection units are in a reflective state. During a third preset time period, multiple third wavelength reflection units are in a light-transmitting state, while multiple first wavelength reflection units and multiple second wavelength reflection units are in a reflective state; The step of each photosensitive element receiving incident light of one of the three wavelengths (first wavelength, second wavelength, and third wavelength) within the preset time period includes the following steps: The plurality of photosensitive elements receive incident light of red wavelength within the first preset time period; The plurality of photosensitive elements receive incident light of green wavelength within the second preset time period; The plurality of photosensitive elements receive incident light of blue wavelength during the third preset time period; Among them, the first preset time, the second preset time, and the third preset time are three consecutive preset time periods.

9. An electronic device, characterized in that, Including the image sensor as described in any one of claims 1-6.

10. A display device, characterized in that, It includes a display panel and an image sensor disposed on the display panel, the image sensor including the image sensor as described in any one of claims 1-6.

Images