TWI592017B - Array imaging system and image sensor - Google Patents

Description

Array imaging system and image sensor

The present invention relates to the field of image technologies, and in particular, to an array imaging system and an image sensor.

A complementary metal-oxide semiconductor (CMOS) image sensor includes a pixel array, a control circuit, an analog front end processing circuit, an analog to digital (A/D) circuit, and image signal processing. Circuit and related storage unit. Due to the high integration, high stability and low cost of CMOS technology, CMOS image sensor-based applications are becoming more and more popular, and have become the first choice for most vision systems.

In addition, CMOS image sensors are also receiving increasing attention due to their wide dynamic range. The dynamic range of the image sensor is the ratio of the maximum unsaturated signal to the noise in dark conditions, which is a key factor in the quality of the image sensor. The dynamic range of CMOS image sensors is only about 60db, while the dynamic range of the subject environment often exceeds 100db. This causes the contrast of the image taken by the CMOS image sensor to be insufficient.

At present, there are mainly methods for improving the dynamic range of a CMOS image sensor: 1. Using a long and short integration time, the pixels of the CMOS image sensor are two or more times, and the obtained two or more pixel information. Perform synthetic processing to achieve wide dynamics. 2, the pixel array two-stage gain or multi-stage gain to achieve a wide dynamic range of the image sensor. In order to achieve a high dynamic range, current technologies require storage and processing of output signals at different integration times, thus increasing The image sensor stores the circuit area, affects the output frame rate of the image, and the like. In addition, processing the multi-level gain image signal also increases the storage circuit area of the image sensor and affects the image frame rate.

The present invention aims to solve at least one of the technical problems in the related art at least to some extent. To this end, a first object of the present invention is to propose an array imaging system.

A second object of the present invention is to provide an image sensor.

An embodiment of the first aspect of the invention provides an array imaging system comprising: a substrate, a pixel array formed on the substrate, and a controller. Each pixel of the pixel array formed on the substrate includes: an image sub-pixel, a collection sub-pixel, and an electrochromic sheet. Image subpixels are used to generate image signals. The acquisition sub-pixel is disposed adjacent to the image sub-pixel for sensing the intensity of the incident light and generating a corresponding voltage signal, the greater the intensity of the incident light, the higher the voltage signal. An electrochromic patch covers the image subpixel. a controller, coupled to the pixel array, for controlling the collection sub-pixel to generate the voltage signal, the voltage signal acting on the electrochromic sheet to change the transmittance of the electrochromic sheet, so that the electrochromic sheet is transmitted through the electrochromic sheet The intensity of the incident light is correspondingly attenuated to obtain an attenuated optical signal. The higher the voltage signal, the lower the transmittance of the electrochromic film. The controller is further configured to control the image sub-pixel to sense the optical signal and control the image sub-pixel to generate the image signal.

According to the array imaging system of the embodiment of the invention, a voltage signal is generated by the collecting sub-pixel, and the voltage signal directly acts on the electrochromic sheet to adjust the transmittance of the electrochromic sheet, so that the electrochromic color is changed when the intensity of the incident light is weak. The transmittance of the sheet is high, and the transmittance of the electrochromic sheet is low when the intensity of the incident light is strong, thereby increasing the sensing range of the change in the intensity of the incident light collected during the integration period of the image sub-pixel. Since the dynamic range of image sub-pixel imaging is consistent with the sensing range of the incident light intensity variation, the dynamic range of the image is also increased.

In some examples, it also includes: a microlens and a color filter. The microlens is disposed on top of the image sub-pixel and the collection sub-pixel. The color filter is disposed under the microlens and covers the image sub-pixel or covers both the image sub-pixel and the acquisition sub-pixel.

In some examples, the size of the image sub-pixel is greater than the sample sub-pixel.

In some examples, the electrochromic sheet includes a transparent conductive layer, an electrochromic layer, an electrolyte layer, and an ion storage layer.

An embodiment of the second aspect of the present invention provides an image sensor comprising: a row decoding circuit, an array imaging system, a sampling circuit, a column decoding circuit, and an analog to digital converter. An array imaging system is used to output an image signal, the array imaging system comprising: a substrate, a pixel array formed on the substrate, and a controller. Each pixel of the pixel array formed on the substrate includes: an image sub-pixel, a collection sub-pixel, and an electrochromic sheet. Image subpixels are used to generate image signals. The acquisition sub-pixel is disposed adjacent to the image sub-pixel for sensing the intensity of the incident light and generating a corresponding voltage signal, the greater the intensity of the incident light, the higher the voltage signal. An electrochromic patch covers the image subpixel. a controller, coupled to the pixel array, for controlling the collection sub-pixel to generate the voltage signal, the voltage signal is applied to the electrochromic sheet to change the transmittance of the electrochromic sheet, so that the electrochromic color is transmitted The intensity of the incident light of the variogram is correspondingly attenuated to obtain an attenuated optical signal, and the higher the voltage signal, the lower the transmittance of the electrochromic sheet. The controller is further configured to control the image sub-pixel to sense the optical signal and control the image sub-pixel to generate the image signal. A sampling circuit is configured to sample the image signal to obtain an analog image signal. a column decoding circuit for outputting the analog image signal; an analog/digital converter for converting the analog image signal into a digital image signal.

According to the image sensor of the embodiment of the present invention, a voltage signal is generated by the collecting sub-pixel, and the voltage signal directly acts on the electrochromic film to adjust the transmittance of the electrochromic film, so that when the intensity of the incident light is weak The electrochromic film has a high transmittance, and when the intensity of the incident light is strong, the transmittance of the electrochromic film is low, thereby increasing the incident light collected during the image sub-pixel integration period. The sensing range of the change in light intensity. Since the dynamic range of image sub-pixel imaging is consistent with the sensing range of the incident light intensity variation, the dynamic range of the image is also increased. In some examples, each of the pixels further includes: a microlens and a color filter. The microlens is disposed on top of the image sub-pixel and the collection sub-pixel. The color filter is disposed under the microlens and covers the image sub-pixel or covers both the image sub-pixel and the acquisition sub-pixel.

In some examples, the size of the image sub-pixel is greater than the sample sub-pixel.

In some examples, the electrochromic sheet includes a transparent conductive layer, an electrochromic layer, an electrolyte layer, and an ion storage layer.

The additional aspects and advantages of the invention will be set forth in part in the description which follows.

ASP‧‧‧Differential Amplifier Circuit

10‧‧‧Base

20‧‧‧pixel array

20a‧‧‧Color filter

22‧‧‧Image subpixel

24‧‧‧Collect subpixels

26‧‧‧Electrochromic film

28‧‧‧Microlens

30‧‧‧ Controller

100‧‧‧Array Imaging System

200‧‧‧Image sensor

202‧‧‧ line decoding circuit

204‧‧‧Sampling circuit

206‧‧‧ column decoding circuit

208‧‧•A/D converter

222, 242‧‧ ‧ re-management

224, 244‧‧‧ transmission door tube

226‧‧‧Source follower

228, 248‧‧ ‧ Photodiodes

246‧‧‧Voltage follower tube

1 is a structural block diagram of an array imaging system according to an embodiment of the present invention; FIG. 2 is a schematic diagram of a pixel array according to an embodiment of the present invention; and FIG. 3 is a schematic diagram of a pixel array according to another embodiment of the present invention; Figure 5 is a schematic cross-sectional view of a pixel array of Figure 3; Figure 5 is a schematic cross-sectional view of a pixel array according to an embodiment of the present invention; and Figure 6 is a schematic diagram of a circuit structure of a collection sub-pixel according to an embodiment of the present invention; The figure is a schematic diagram of the circuit structure of an image sub-pixel according to an embodiment of the present invention; FIG. 8 is a schematic structural view of an electrochromic film according to an embodiment of the present invention; and FIG. 9 is an electrochromic change according to an embodiment of the present invention. Transmittance graph of a sheet; Fig. 10 is a schematic structural view of an image sensor according to an embodiment of the present invention; and Fig. 11 is a view showing an example of an image sensor according to an embodiment of the present invention.

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

Referring to FIG. 1, an array imaging system 100 of an embodiment of the first aspect of the present invention includes a substrate 10, a pixel array 20 formed on a substrate, and a controller 30.

Each pixel includes an image sub-pixel 22, an acquisition sub-pixel 24, and an electrochromic sheet 26. Image sub-pixel 22 is used to generate an image signal. The acquisition sub-pixel 24 is disposed adjacent to the image sub-pixel 22 for sensing the intensity of the incident light and generating a voltage signal. The greater the intensity of the incident light, the higher the voltage signal. The electrochromic sheet 26 covers the image sub-pixels 22. The controller 30 is coupled to the pixel array 20 for controlling the acquisition sub-pixel 24 to control the acquisition sub-pixel 24 to generate a voltage signal, and the voltage signal acts on the image sub-pixel 22 before the image sub-pixel 22 acquires the signal. The color change sheet 26 is changed to change the transmittance of the electrochromic film 26. The higher the voltage signal, the lower the transmittance of the electrochromic sheet 26, so that the intensity of the incident light transmitted through the electrochromic sheet 26 is correspondingly attenuated to obtain the attenuated optical signal. After the transmittance of the electrochromic sheet 26 is changed, the controller 30 controls the image sub-pixel 22 to receive the attenuated optical signal during the integration period, and the image sub-pixel 22 generates an image signal. The collection sub-pixel 24 is disposed adjacent to the image sub-pixel 22 in order to ensure that the intensity of the incident light for generating the voltage signal in the acquisition sub-pixel 24 coincides with the intensity of the incident light collected by the image sub-pixel 22. The arrangement of the collection sub-pixels 24 adjacent to the image sub-pixels 22 can be as shown in FIGS. 2 and 3. Each pixel contains two sub-pixels, an image sub-pixel 22 and an acquisition sub-pixel 24. For example, 11 sub-pixels and 11' sub-pixels constitute one red pixel, wherein 11 sub-pixels are image sub-pixels, and 11' sub-pixels are acquisition sub-pixels.

Further, in an embodiment of the invention, each pixel further includes: a microlens 28 and a color filter 20a. The microlens 28 is disposed on top of the image sub-pixel 22 and the acquisition sub-pixel 24. The color filter 20a is disposed below the microlens 28 and covers the image sub-pixel 22 or both the image sub-pixel 22 and the acquisition sub-pixel 24.

In one embodiment of the invention, substrate 10 is a ruthenium substrate.

Electrochromic (EC) is a kind of optical property changeable color change. It generally refers to the reversible color change of a material under the action of an external electric field or current. It is intuitively represented as a process in which the color and transparency of a material undergo a reversible change. It is continuously adjustable, that is, the ratio of the transmittance, absorption rate and reflectance of the material is adjustable. A color changing material such as tungsten trioxide available in the embodiments of the present invention. The voltage signal generated by the acquisition sub-pixel 24 is applied to the transparent electrode in the electrochromic sheet 26 embedded in the image sub-pixel 22 to adjust the transmittance of the electrochromic sheet. Transparent electrodes usable in the embodiments of the present invention are indium tin oxide, silver ink, and the like.

In one embodiment of the invention, image sub-pixel 22 is larger in size than sample sub-pixel 24. This arrangement can significantly increase the light receiving area of the image sub-pixel 22 and improve the ability of the image sub-pixel 22 to collect incident light. As shown in the schematic diagram of the pixel array shown in FIG. 3, an array of 3*3 is taken as an example. Each pixel includes two sub-pixels, namely an image sub-pixel 22 and an acquisition sub-pixel 24. The 11-sub-pixel and the 11' sub-pixel constitute one red pixel, wherein 11 sub-pixels are image sub-pixels, and 11' sub-pixels are collected. Subpixel. The 11' sub-pixel generates a voltage signal, and the greater the intensity of the incident light, the higher the generated voltage signal. 22 and 22' constitute a green pixel, wherein sub-pixel 22 is an image sub-pixel and 22' is a collection sub-pixel. The 33 sub-pixels and the 33' sub-pixels and other pixels are all composed in this manner. Above the 11 is an inlaid electrochromic sheet 26, 11 which is a transparent medium from above the substrate 10.

Figure 4 is a cross-sectional view of the diagonal line at the top left and bottom right of Figure 3. The dotted frame portion is the sub-pixels 11 and 11', and A and A1, B and B1, C and C1 are the photo sub-pixel 22 and the photodiode of the acquisition sub-pixel 24, respectively. In section 4 of the section, 26 is an 11-pixel inlaid electrochromic sheet (electrochromic change) The sheet may also be embedded in the 11-pixel microlens 28 or the color filter 20a, and U and D are the transparent electrodes of the electrochromic sheet 26, respectively. The U, D transparent electrodes of the electrochromic film 26 are connected to the voltage signal generating circuit of the collecting sub-pixel 11' in Fig. 4. The voltage signal generated by the 11' sub-pixel acts on the electrochromic sheet 26 in the 11 sub-pixels. The sub-pixels 22, 22' and 33, 33' operate in the same manner as 11, 11'. The greater the intensity of the incident light, the higher the voltage signal generated by the acquisition sub-pixel 24. 282 is a microlens above the image sub-pixel 22, 284 is a microlens above the acquisition sub-pixel, and 20a is a color filter.

In particular, in one embodiment of the present invention, as shown in FIG. 5, a color filter of the same color as the image sub-pixel 22 is disposed above the collection sub-pixel 24. When the color filter is disposed on the acquisition sub-pixel 24, the intensity of the voltage signal induced by the acquisition sub-pixel 24 is proportional to the color brightness.

Figure 6 is a schematic diagram of the circuit structure of the acquisition sub-pixel 24, 242 is a re-pipe, 244 is a transmission gate, 246 is a voltage follower, and 248 is a photodiode. Acquisition Sub-pixels In Figure 6, the re-nuclear tube 242 and the transmission gate tube 244 are reset under the control of the RST re-set signal, and the photodiode 248 collects incident light. The collected incident light is transmitted to the amplitude diffusion point fd. The amplitude spread point fd produces an output signal under the control of the TX transmission gate signal, that is, a voltage signal that is positive between the Vddp and Out and the intensity of the incident light. That is, the greater the intensity of the incident light, the greater the potential difference between Vddp and Out. When the image sub-pixel 22 is integrated, the voltage signal is applied directly to the transparent electrode of the electrochromic sheet 26.

Figure 7 is a schematic diagram of the circuit structure of the image sub-pixel 22, 222 is a re-ball, 224 is a transmission gate, 226 is a source follower, 228 is a photodiode, and 22a is a row strobe. The difference between the image sub-pixel 22 and the circuit for collecting the sub-pixel 24 is that the output voltage of the acquisition sub-pixel 24 is directly loaded onto the transparent electrode of the electrochromic sheet 26 of the image sub-pixel 22, while the image sub-pixel 22 The signal is output to the column sampling circuit and ultimately used for image processing.

In one embodiment of the present invention, as shown in FIG. 8, the electrochromic sheet 26 includes a transparent conductive layer, an electrochromic layer, an electrolyte layer, and an ion storage layer. Transmittance of electrochromic sheet 26 The lower the frequency, the higher the voltage signal of the acquisition sub-pixel 24. The change curve of the transmittance of the incident light of the electrochromic film 26 is as shown in Fig. 9.

According to the array imaging system of the embodiment of the invention, a voltage signal is generated by the collecting sub-pixel, and the voltage signal directly acts on the electrochromic film to adjust the transmittance of the electrochromic film, so that when the intensity of the incident light is weak, the signal is electrically The color change film has a high transmittance, and when the intensity of the incident light is strong, the transmittance of the electrochromic film is low, thereby increasing the sensing range of the light intensity variation of the incident light collected during the image sub-pixel integration period. . Since the dynamic range of image sub-pixel imaging is consistent with the sensing range of the incident light intensity variation, the dynamic range of the image is also increased.

An embodiment of the second aspect of the present invention provides an image sensor 200, as shown in FIG. 10, comprising: a row decoding circuit 202, an array imaging system 100, a sampling circuit 204, a column decoding circuit 206, and an analog to digital conversion. 208.

The line decoding circuit 202 is for collecting incident light. The array imaging system 100 is for outputting image signals. A sampling circuit is used to convert the image signal output by the array imaging system 100 into an analog image signal. The column decoding circuit 206 is for outputting an analog image signal output from the sampling circuit 204. The analog/digital converter 208 is for converting the analog image signal amplified by the differential amplifying circuit ASP into a digital image signal.

The array imaging system 100 includes a substrate 10, a pixel array 20 formed on a substrate, and a controller 30.

Each pixel includes an image sub-pixel 22, an acquisition sub-pixel 24, and an electrochromic sheet 26. Image sub-pixel 22 is used to generate an image signal. The acquisition sub-pixel 24 is disposed adjacent to the image sub-pixel 22 for sensing the intensity of the incident light and generating a voltage signal. The greater the intensity of the incident light, the higher the voltage signal. The electrochromic sheet 26 covers the image sub-pixels 22. The controller 30 is coupled to the pixel array 20 for controlling the acquisition sub-pixel 24 to control the acquisition sub-pixel 24 to generate a voltage signal, and the voltage signal acts on the image sub-pixel 22 before the image sub-pixel 22 acquires the signal. Color change film 26 to change The transmittance of the electrochromic sheet 26 is changed. The higher the voltage signal, the lower the transmittance of the electrochromic sheet 26, so that the intensity of the incident light transmitted through the electrochromic sheet 26 is correspondingly attenuated to obtain the attenuated optical signal. After the transmittance of the electrochromic sheet 26 is changed, the controller 30 controls the image sub-pixel 22 to receive the attenuated optical signal during the integration period, and the image sub-pixel 22 generates an image signal. The collection sub-pixel 24 is disposed adjacent to the image sub-pixel 22 in order to ensure that the intensity of the incident light for generating the voltage signal in the acquisition sub-pixel 24 coincides with the intensity of the incident light collected by the image sub-pixel 22. The arrangement of the collection sub-pixels 24 adjacent to the image sub-pixels 22 can be as shown in FIGS. 2 and 3. Each pixel contains two sub-pixels, an image sub-pixel 22 and an acquisition sub-pixel 24. For example, 11 sub-pixels and 11' sub-pixels constitute one red pixel, wherein 11 sub-pixels are image sub-pixels, and 11' sub-pixels are acquisition sub-pixels.

Further, in an embodiment of the invention, each pixel further includes: a microlens 28 and a color filter 20a. The microlens 28 is disposed on top of the image sub-pixel 22 and the acquisition sub-pixel 24. The color filter 20a is disposed below the microlens 28 and covers the image sub-pixel 22 or both the image sub-pixel 22 and the acquisition sub-pixel 24.

In one embodiment of the invention, substrate 10 is a ruthenium substrate.

Electrochromic (EC) is a kind of optical property changeable color change. It generally refers to the reversible color change of a material under the action of an external electric field or current. It is intuitively represented as a process in which the color and transparency of a material undergo a reversible change. It is continuously adjustable, that is, the ratio of the transmittance, absorption rate and reflectance of the material is adjustable. A color changing material such as tungsten trioxide available in the embodiments of the present invention. The voltage signal generated by the acquisition sub-pixel 24 is applied to the transparent electrode in the electrochromic sheet 26 embedded in the image sub-pixel 22 to adjust the transmittance of the electrochromic sheet. Transparent electrodes usable in the embodiments of the present invention are indium tin oxide, silver ink, and the like.

In one embodiment of the invention, image sub-pixel 22 is larger in size than sample sub-pixel 24. This arrangement can significantly increase the light receiving area of the image sub-pixel 22 and improve the image sub-pixel. 22 The ability to collect incident light. As shown in the schematic diagram of the pixel array shown in FIG. 3, an array of 3*3 is taken as an example. Each pixel includes two sub-pixels, namely an image sub-pixel 22 and an acquisition sub-pixel 24. The 11-sub-pixel and the 11' sub-pixel constitute one red pixel, wherein 11 sub-pixels are image sub-pixels, and 11' sub-pixels are collected. Subpixel. The 11' sub-pixel generates a voltage signal, and the greater the intensity of the incident light, the higher the generated voltage signal. 22 and 22' constitute a green pixel, wherein sub-pixel 22 is an image sub-pixel and 22' is a collection sub-pixel. The 33 sub-pixels and the 33' sub-pixels and other pixels are all composed in this manner. Above the 11 is an inlaid electrochromic sheet 26, 11 which is a transparent medium from above the substrate 10.

Figure 4 is a cross-sectional view of the diagonal line at the top left and bottom right of Figure 3. The dotted frame portion is the sub-pixels 11 and 11', and A and A1, B and B1, C and C1 are the photo sub-pixel 22 and the photodiode of the acquisition sub-pixel 24, respectively. In section 4 of the section, 26 is an 11-pixel inlaid electrochromic sheet (the electrochromic sheet can also be embedded in the 11-pixel microlens 28 or the color filter 20a), and U and D are respectively electro-induced. The transparent electrode of the color changing sheet 26. The U, D transparent electrodes of the electrochromic sheet 26 are connected to the voltage signal generating circuit of the collecting sub-pixel 11' in Fig. 4. The voltage signal generated by the 11' sub-pixel acts on the electrochromic sheet 26 in the 11 sub-pixels. The sub-pixels 22, 22' and 33, 33' operate in the same manner as 11, 11'. The greater the intensity of the incident light, the higher the voltage signal generated by the acquisition sub-pixel 24. 282 is a microlens above the image sub-pixel 22, 284 is a microlens above the acquisition sub-pixel, and 20a is a color filter.

In particular, in one embodiment of the present invention, as shown in FIG. 5, a color filter of the same color as the image sub-pixel 22 is disposed above the collection sub-pixel 24. When the color filter is disposed on the acquisition sub-pixel 24, the intensity of the voltage signal induced by the acquisition sub-pixel 24 is proportional to the color brightness.

Figure 6 is a schematic diagram of the circuit structure of the acquisition sub-pixel 24, 242 is a re-pipe, 244 is a transmission gate, 246 is a voltage follower, and 248 is a photodiode. Acquisition Sub-pixels In Figure 6, the re-nuclear tube 242 and the transmission gate tube 244 are reset under the control of the RST re-set signal, and the photodiode 248 collects incident light. The collected incident light is transmitted to the amplitude diffusion point fd. The amplitude spread point fd produces an output signal under the control of the TX transmission gate signal, that is, the intensity of the generated light between Vddp and Out is Positive voltage signal. That is, the greater the intensity of the incident light, the greater the potential difference between Vddp and Out. When the image sub-pixel 22 is integrated, the voltage signal is applied directly to the transparent electrode of the electrochromic sheet 26.

Figure 7 is a schematic diagram of the circuit structure of the image sub-pixel 22, 222 is a re-ball, 224 is a transmission gate, 226 is a source follower, 228 is a photodiode, and 22a is a row strobe. The biggest difference between the image sub-pixel 22 and the circuit for collecting the sub-pixel 24 is that the output voltage of the acquisition sub-pixel 24 is directly loaded onto the transparent electrode of the electrochromic sheet 26 of the image sub-pixel 22, while the image sub-pixel 22 The signal is output to the column sampling circuit and ultimately used for image processing.

In one embodiment of the present invention, as shown in FIG. 8, the electrochromic sheet 26 includes a transparent conductive layer, an electrochromic layer, an electrolyte layer, and an ion storage layer. The lower the transmittance of the electrochromic film 26, the higher the voltage signal of the acquisition sub-pixel 24. The change curve of the transmittance of the incident light of the electrochromic film 26 is as shown in Fig. 9.

Furthermore, as shown in FIG. 11, the photoelectric conversion of the image sub-pixels 22 in the pixel array of the array imaging system 100 of the image sensor 200 and the generation of the induced sub-pixel 24 induced voltage signals are controlled by the row decoder 202. The output of the image sub-pixel 22 is controlled by the sampling circuit 204 and the column decoding circuit 206. The pixel to be read is selected by the row decoding circuit 202 and the column decoding circuit 206, and the image signal is output to a sampling (CDS) circuit to eliminate fixed mode noise (FPN), and then sequentially amplified by a differential amplification circuit (ASP). Analog to digital conversion is accomplished in an analog to digital converter (ADC) 208.

In addition, other configurations and functions of the image sensor 200 according to the embodiment of the present invention are known to those skilled in the art, and are not described herein.

According to the image sensor of the embodiment of the present invention, a voltage signal proportional to the intensity of the incident light is generated by the collecting sub-pixel, and the transmittance of the electrochromic film is adjusted so that the electrochromic sheet is weak when the light intensity is weak. The transmittance is very high, and when the light is strong, the transmittance of the electrochromic film is greatly reduced, thereby increasing the sensing range of the intensity variation of the incident light collected during the image sub-pixel integration period. Wai. Since the dynamic range of image sub-pixel imaging is consistent with the sensing range of the incident light intensity variation, the dynamic range of the image is also increased.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " After, "Left", "Right", "Vertical", "Level", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship of the "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplified description, and does not indicate or imply the indicated device or component. It must be constructed and operated in a particular orientation, and is not to be construed as limiting the invention.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" or "second" may include at least one of the features, either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.

In the present invention, the terms "installation", "connected", "connected", "fixed" and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. , or integrated; can be mechanical or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction of two elements, unless otherwise specified Limited. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

In the present invention, the first feature "on" or "under" the second feature may be a direct contact of the first and second features, or the first and second features may be indirectly through an intermediate medium, unless otherwise explicitly stated and defined. contact. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or above the second feature, or merely represents the first feature level The height is higher than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or below the second feature, or merely that the first feature level is less than the second feature.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms is not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, various embodiments or examples described in the specification, as well as features of various embodiments or examples, may be combined and combined.

Although the embodiments of the present invention have been shown and described, it is understood that the above-described embodiments are illustrative and are not to be construed as limiting the scope of the invention. The embodiments are subject to variations, modifications, substitutions and variations.

10‧‧‧Base

20‧‧‧pixel array

20a‧‧‧Color filter

22‧‧‧Image subpixel

24‧‧‧Collect subpixels

26‧‧‧Electrochromic film

28‧‧‧Microlens

30‧‧‧ Controller

100‧‧‧Array Imaging System

Claims (6)

An array imaging system includes: a substrate; an array of pixels formed on the substrate, each pixel comprising: an image sub-pixel for generating an image signal; and a collection sub-pixel adjacent to the image sub-pixel setting for sensing The intensity of the incident light, and according to the intensity of the incident light, a corresponding voltage signal is generated. The greater the intensity of the incident light, the higher the voltage signal, wherein the size of the image sub-pixel is larger than the sampling sub-pixel; and the electrochromic film, Covering the image sub-pixel; and a controller coupled to the pixel array for controlling the collection sub-pixel to generate the voltage signal, the voltage signal acting on the electrochromic sheet to change the transmission of the electrochromic sheet The rate is such that the intensity of the incident light transmitted through the electrochromic film is correspondingly attenuated to obtain the attenuated optical signal. The higher the voltage signal, the lower the transmittance of the electrochromic film; the controller also uses And controlling the image sub-pixel to sense the attenuated optical signal and controlling the image sub-pixel to generate the image signal. The array imaging system of claim 1, wherein each of the pixels further comprises: a microlens disposed on the top of the image sub-pixel and the collection sub-pixel; and a color filter, The color filter is disposed under the microlens and covers the image sub-pixel or covers both the image sub-pixel and the acquisition sub-pixel. The array imaging system of claim 1, wherein the electrochromic sheet comprises: a transparent conductive layer, an electrochromic layer, an electrolyte layer, and an ion storage layer. An image sensor comprising: a line decoding circuit; An array imaging system for outputting an image signal, the array imaging system comprising: a substrate; an array of pixels formed on the substrate, each pixel comprising: image sub-pixels for generating image signals; collecting sub-pixels adjacent to the The image sub-pixel is configured to sense the intensity of the incident light and generate a corresponding voltage signal according to the incident light intensity. The greater the intensity of the incident light, the higher the voltage signal, wherein the size of the image sub-pixel is larger than the sampling. a sub-pixel; and an electrochromic film covering the image sub-pixel; and a controller coupled to the pixel array for controlling the collection sub-pixel to generate the voltage signal, the voltage signal acting on the electrochromic film In order to change the transmittance of the electrochromic sheet, the intensity of the incident light transmitted through the electrochromic sheet is correspondingly attenuated to obtain an attenuated optical signal, and the higher the voltage signal, the electrochromic sheet The lower the transmittance; the controller is further configured to control the image sub-pixel to sense the optical signal and control the image sub-pixel to generate the image signal; and the sampling circuit is configured to perform the image signal Analog image signal to obtain samples; a column decoder circuit for outputting an image signal such ratio; and an analog / digital converter for converting the analog image signals are digital image signals. The image sensor of claim 4, wherein each of the pixels further comprises: a microlens disposed on the top of the image sub-pixel and the collection sub-pixel; a color filter, The color filter is disposed under the microlens and covers the image sub-pixel or covers both the image sub-pixel and the acquisition sub-pixel. The image sensor of claim 4, wherein the electrochromic sheet comprises: a transparent conductive layer, an electrochromic layer, an electrolyte layer, and an ion storage layer.