CN104967763B - A kind of image acquisition device, image-pickup method and electronic equipment - Google Patents
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Abstract
The invention discloses a kind of image acquisition devices, described image sampler includes camera lens, imaging sensor, analog-digital converter, first memory, wherein: the camera lens, for receiving the incident light through scene reflections, the incident light becomes emergent light after camera lens；Described image sensor for receiving the emergent light from camera lens, and is converted to according to the intensity of the emergent light charge of corresponding proportion, forms the current value of analog signal；The electric current of the analog-digital converter, the analog signal for exporting described image sensor is converted into the current value of digital signal；The first memory, the current value of the digital signal for temporarily storing the analog converter output.The present invention also discloses a kind of electronic equipment and image-pickup method.
Description
Technical Field
The present invention relates to electronic technologies, and in particular, to an image capturing device, an image capturing method, and an electronic apparatus.
Background
Image capturing devices such as cameras have become an essential component of electronic devices. With the increasing requirements of people on picture quality, the number of pixels of an image acquisition device is increased under the same area, that is, the area of each photosite is decreased, so that the leakage current and the dark current on the image acquisition device are increased, and the power consumption is increased and the effect of the acquired image is reduced.
Disclosure of Invention
In view of this, embodiments of the present invention provide an image capturing device, an electronic device, and an image capturing method to solve at least one problem in the prior art, which can reduce leakage current and dark current, thereby improving the image effect.
The technical scheme of the embodiment of the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides an image capturing device, where the image capturing device includes a lens, an image sensor, an analog-to-digital converter, and a first memory, where:
the lens is used for receiving incident light reflected by a scene, and the incident light becomes emergent light after passing through the lens;
the image sensor is used for receiving emergent light from the lens, converting the emergent light into charges with corresponding proportion according to the intensity of the emergent light, and forming a current value of an analog signal;
the analog-to-digital converter is used for converting the current of the analog signal output by the image sensor into the current value of the digital signal;
the first memory is used for temporarily storing the current value of the digital signal output by the analog converter.
In an embodiment of the present invention, the image capturing device includes two or more analog-to-digital converters.
In one embodiment of the invention, the image sensors form an M × N image sensor matrix, and the M, N is an integer greater than or equal to 1.
In an embodiment of the present invention, the image capturing device includes N analog-to-digital converters, and each of the N analog-to-digital converters is configured to convert a current output by a corresponding column in the image sensor matrix; or,
the image acquisition device comprises M analog-to-digital converters, and each analog-to-digital converter in the M analog-to-digital converters is used for converting the current output by the corresponding row in the image sensor matrix; or,
the image acquisition device comprises M x N analog-to-digital converters, and each analog-to-digital converter in the M x N analog-to-digital converters is used for converting the current output by the image sensor corresponding to the image sensor matrix.
In one embodiment of the invention, the first memory is made of a ferroelectric material.
In an embodiment of the invention, the first memory is configured to store voltage values of digital signals corresponding to the image sensor matrix.
In a second aspect, an embodiment of the present invention provides an electronic device, which includes an image capturing device, a processor, and a second memory, where the image capturing device includes a lens, an image sensor, an analog-to-digital converter, and a first memory, where:
the lens is used for receiving incident light reflected by a scene, and the incident light becomes emergent light after passing through the lens;
the image sensor is used for receiving emergent light from the lens, converting the emergent light into charges with corresponding proportion according to the intensity of the emergent light, and forming a current value of an analog signal;
the analog-to-digital converter is used for converting the current of the analog signal output by the image sensor into the current value of the digital signal;
the first memory is used for temporarily storing the current value of the digital signal output by the analog converter;
the processor is used for transferring the digital signals stored in the first memory to the second memory.
In one embodiment of the invention, the first memory is made of a ferroelectric material.
In a third aspect, an embodiment of the present invention provides an image acquisition method, where the method includes:
the incident light reflected by the scenery becomes emergent light after passing through a lens on the electronic equipment;
an image sensor on the electronic equipment receives emergent light from a lens, and converts the emergent light into charges with corresponding proportion according to the intensity of the emergent light to form a current value of an analog signal;
an analog-to-digital converter on the electronic equipment converts the current value of the analog signal into the current value of a digital signal;
temporarily storing a current value of the digital signal on a first memory on an electronic device;
and outputting the current value of the digital signal to a display screen of the electronic equipment.
In one embodiment of the invention, the method further comprises:
when the intensity of emergent light sensed by the lens changes, the current value of a new digital signal generated by the emergent light after passing through the image sensor and the analog-to-digital converter is stored in a first memory.
The embodiment of the invention provides an image acquisition device, electronic equipment and an image acquisition method, wherein the image acquisition device comprises a lens, an image sensor, an analog-to-digital converter and a first memory, wherein: the lens is used for receiving incident light reflected by a scene, and the incident light becomes emergent light after passing through the lens; the image sensor is used for receiving emergent light from the lens, converting the emergent light into charges with corresponding proportion according to the intensity of the emergent light, and forming a current value of an analog signal; the analog-to-digital converter is used for converting the current of the analog signal output by the image sensor into the current value of the digital signal; the first memory is used for temporarily storing the current value of the digital signal output by the analog converter; thus, leakage current and dark current can be reduced, and the image effect is improved.
Drawings
FIG. 1 is a schematic diagram of a structure of an image capturing device according to the related art;
FIG. 2 is a schematic diagram of a structure of an image capturing device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a fifth electronic device according to an embodiment of the invention;
FIG. 4 is a top view of the image capture device shown in FIG. 2;
FIG. 5 is a schematic view of a connection structure between components of the image capturing device according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a prior art image capturing device;
fig. 7 is a schematic flow chart illustrating an implementation of the image acquisition method according to the embodiment of the present invention.
Detailed Description
The following describes a composition structure of an image capturing device, which generally includes a Lens (Lens), an image sensor, an Analog/Digital (a/D) converter, and a Digital signal processing chip (DSP). The working principle of the image acquisition device is roughly as follows: after the camera is started, light reflected by a scene is transmitted to the lens, an optical image generated by the lens is projected onto the surface of the image sensor, the image sensor accumulates corresponding charges according to the intensity of light, namely, a light signal is converted into an analog electric signal, the analog electric signal is converted into a digital electric signal after A/D conversion, and the digital electric signal is processed by the digital signal processing chip to form an image seen by a user on a display. Wherein,
the lens is composed of lenses, the lenses are generally divided into glass lenses and plastic lenses according to materials, and the current mainstream lens is a five-layer glass lens; the glass lens can obtain a clearer image than the plastic lens. This is because light is generally lost only 5% -9% through ordinary glass lenses, while the light loss of plastic lenses is as high as 11% -20%. Some lenses also adopt a multilayer optical coating technology, so that the refraction of light is effectively reduced, clutter is filtered, the light transmission rate is improved, and a clearer image is obtained. In addition, the lens has an important parameter, namely the aperture, the light quantity reaching the sensor through the lens can be controlled by adjusting the aperture, and besides the light flux, the aperture also has the function of controlling the depth of field, namely the depth of field is smaller when the aperture is larger.
Image sensors typically include both CCDs and CMOSs, wherein additional Metal-Oxide Semiconductor (CMOS) components have the advantages of high integration, low power consumption (less than 1/3 for CCDs), and low cost. However, CMOS has a relatively large noise, low sensitivity, and high requirements for light sources. Charge Coupled Devices (CCDs) can be divided into linear-array CCDs, three-line CCDs, area-array CCDs, and interleaved transfer CCDs. The CCD is the core of the image capturing device, just like the human retina. A CCD is a semiconductor chip having a surface including hundreds of thousands to millions of photodiodes, which generate electric charges when they are irradiated with light. The CCD has the advantages that: high sensitivity, low noise, large signal-to-noise ratio, but complex production process, high cost and high power consumption. Under the same pixel, CCD imaging is often good in permeability and sharpness, and color restoration and exposure can be guaranteed to be basically accurate. However, CMOS products often have a general permeability, weak color reduction capability to real objects, and poor exposure. The CCD is composed of an area array of photosensitive elements, each element is called a pixel, and the more pixels, the sharper the image.
The DSP chip generally includes an Image Signal Processor (ISP) and a JPEG image decoder (JPEG encoder), and some DSP chips also include a USB device controller (USB device controller).
Referring to the drawings, the problems described in the background of the present invention will be described, fig. 1 is a schematic structural diagram of an image capturing device in the related art, as shown in fig. 1, light reflected by a subject propagates to a lens 11, an optical image generated through the lens is projected onto a surface of an image sensor 12, a photodiode on the image sensor accumulates corresponding charges according to the intensity of light, that is, an optical signal is converted into an analog electrical signal, and the analog electrical signal is converted into a digital electrical signal by an a/D converter 13, wherein a color filter 14 is further disposed between the lens 11 and the image sensor 12, and the color filter 14 generally represents a color image by using three primary colors (RGB, where R represents red, G represents green, and B represents blue); the image sensor 12 and the a/D converter 13 are connected by a multilayer wiring 15. With the increasing requirements of people on the picture quality, the pixels of the image acquisition device are also increased, the number of the pixels under the same area is increased, namely the area of each photosite is decreased, in other words, the number of the image sensors on the image sensing array under the same area is increased, in the process of shooting images, the image sensing array displays the current scenery in a viewing frame on the electronic equipment through continuous refreshing, namely the image sensing array is refreshed periodically, the image sensors on the image sensing array are refreshed automatically, and the refreshed images are output to a display screen after passing through an analog-to-digital converter; in the process of outputting the image to the display screen, as the number of the image sensors on the image sensing array is more and more, the A/D conversion process needs to wait, and the A/D conversion process also needs to wait for transmitting the image to the display, so that the leakage current is increased for the image sensors, and the power consumption is increased and the effect of the acquired image is reduced.
The technical solution of the present invention is further elaborated below with reference to the drawings and the specific embodiments.
Example one
In order to solve the problems in the foregoing background, an embodiment of the present invention provides an image capturing device, where the image capturing device is used in an electronic device, where the electronic device includes: a mobile terminal such as a smart phone, a notebook computer, a digital broadcast receiver, a PDA (personal digital assistant), a PAD (tablet computer), a PMP (portable multimedia player), a navigation device, etc., and a fixed terminal such as a digital TV, a desktop computer, etc.
Fig. 2 is a schematic diagram of a composition structure of an image capturing device according to an embodiment of the present invention, and as shown in fig. 2, the image capturing device 200 includes a lens 201, an image sensor 202, an a/D converter 203, and a first memory 204, where:
the lens 201 is used for receiving incident light reflected by a scene, and the incident light becomes emergent light after passing through the lens;
the image sensor 202 is used for receiving emergent light from a lens, converting the emergent light into charges with corresponding proportion according to the intensity of the emergent light, and forming a current value of an analog signal;
the analog-to-digital converter 203 is configured to convert a current of an analog signal output by the image sensor into a current value of a digital signal;
the first memory 204 is used for temporarily storing the current value of the digital signal output by the analog converter.
In the above embodiment, the color filter 205 is further disposed between the lens 201 and the image sensor 202, and the color filter 205 generally represents a color image by using three primary colors; the image sensor 202 and the a/D converter 203 are connected by a multilayer wiring 206.
In the embodiment of the invention, the image acquisition device comprises two or more analog-to-digital converters.
In the embodiment of the present invention, the image capturing device includes a lens, an image sensor, an analog-to-digital converter, and a first memory, wherein: the lens is used for receiving incident light reflected by a scene, and the incident light becomes emergent light after passing through the lens; the image sensor is used for receiving emergent light from the lens, converting the emergent light into charges with corresponding proportion according to the intensity of the emergent light, and forming a current value of an analog signal; the analog-to-digital converter is used for converting the current of the analog signal output by the image sensor into the current value of the digital signal; the first memory is used for temporarily storing the current value of the digital signal output by the analog converter; thus, leakage current and dark current can be reduced, and the image effect is improved.
Example two
Based on the first embodiment, an embodiment of the present invention provides an image capturing device, where the image capturing device is used in an electronic device, and the electronic device includes: mobile terminals such as smart phones, notebook computers, digital broadcast receivers, PDAs, PADs, PMPs, navigation devices, etc., and fixed terminals such as digital TVs, desktop computers, etc.
The image acquisition device comprises a lens, an image sensor, an analog-to-digital converter and a first memory, wherein:
the lens is used for receiving incident light reflected by a scene, and the incident light becomes emergent light after passing through the lens;
the image sensor is used for receiving emergent light from the lens, converting the emergent light into charges with corresponding proportion according to the intensity of the emergent light, and forming a current value of an analog signal; wherein the image sensors form an M × N image sensor matrix, and the M, N is an integer greater than or equal to 1.
Each analog-to-digital converter in the N analog-to-digital converters is used for converting the current output by a corresponding column in the image sensor matrix;
the first memory is used for temporarily storing the current value of the digital signal output by each analog-to-digital converter in the N analog-to-digital converters.
In the above embodiments, a color filter is further disposed between the lens and the image sensor, and the color filter generally uses three primary colors to represent a color image; the image sensor and the analog-to-digital converter are connected by a multilayer wiring.
In the embodiment of the invention, the first memory is made of a ferroelectric material. The first memory is used for storing voltage values of digital signals corresponding to the image sensor matrix. The principle of storing the voltage value of the digital signal by using the ferroelectric material is as follows:
all ferroelectric materials have both ferroelectric and piezoelectric properties. Ferroelectricity means that a material produces spontaneous polarization over a certain temperature range. Because the positive and negative charge centers in the ferroelectric crystal lattice are not overlapped, the electric dipole moment can be generated even without an external electric field, the spontaneous polarization can change direction under the action of the external electric field, when the temperature is higher than a certain critical value, the crystal lattice structure is changed, the positive and negative charge centers are overlapped, the spontaneous polarization disappears, and the temperature critical value is called as Curie temperature (Tc). Piezoelectricity is a property that achieves mechanical-electrical interconversion. If an external force is applied to the material in a certain direction to deform the material, polarization can occur in the material and charges are generated on the surface, namely the piezoelectric effect; on the contrary, when an electric field is applied to a material, the material is deformed to generate a mechanical force, which is an inverse piezoelectric effect.
Ferroelectric materials are materials having spontaneous polarization with two or more orientations, and the orientations of the spontaneous polarization can be turned under the action of an applied electric field, so that ferroelectric Memories (MFSFETs) can be fabricated by using this characteristic, that is: the two states of the remanent polarization of the ferroelectric material respectively correspond to the '0' state and the '1' state of the memory, and information can be read by changing the storage state through the change of the direction of an external electric field, so that the possibility of information storage is provided, and the new memory device of the ferroelectric memory is generated. The storage principle of a ferroelectric memory is such that: the ferroelectric crystal belongs to a typical ABO3 type perovskite structure, and below the Curie temperature, the ferroelectric crystal generates spontaneous distortion, and B site atoms are displaced relative to other atoms in a unit cell to generate net dipole moment and form spontaneous polarization. In the absence of an applied electric field, + Pr and Pr indicate two stable states, "0" and "1". When an external electric field is applied to the ferroelectric crystal, the central atom moves up and down in the crystal in the direction of the applied electric field, which needs to pass through an energy barrier to cause charge breakdown. The internal circuitry senses the charge breakdown and configures the memory. When the electric field is removed from the crystal, the central atom will remain in place and the state of the memory will be preserved. The ferroelectric memory does not need to be updated regularly, data can be stored continuously after power failure, and the ferroelectric memory is high in speed and not easy to be damaged by writing. Ferroelectric memories are based on the ferroelectric properties of ferroelectric materials for information storage. This makes it stable and unchanged without electric field and is not affected by interference source such as irradiation, so that the ferroelectric memory has the excellent characteristics of non-volatility, radiation resistance, interference resistance and fast storage speed.
EXAMPLE III
Based on the first embodiment, an embodiment of the present invention provides an image capturing device, where the image capturing device is used in an electronic device, and the electronic device includes: mobile terminals such as smart phones, notebook computers, digital broadcast receivers, PDAs, PADs, PMPs, navigation devices, etc., and fixed terminals such as digital TVs, desktop computers, etc.
The image acquisition device comprises a lens, an image sensor, an analog-to-digital converter and a first memory, wherein:
the lens is used for receiving incident light reflected by a scene, and the incident light becomes emergent light after passing through the lens;
the image sensor is used for receiving emergent light from the lens, converting the emergent light into charges with corresponding proportion according to the intensity of the emergent light, and forming a current value of an analog signal; wherein the image sensors form an M × N image sensor matrix, and the M, N is an integer greater than or equal to 1.
M analog-to-digital converters, wherein each analog-to-digital converter in the M analog-to-digital converters is used for converting the current output by the corresponding row in the image sensor matrix;
the first memory is used for temporarily storing the current value of the digital signal output by each analog-to-digital converter in the M analog-to-digital converters.
In the above embodiments, a color filter is further disposed between the lens and the image sensor, and the color filter generally uses three primary colors to represent a color image; the image sensor and the analog-to-digital converter are connected by a multilayer wiring.
Example four
Based on the first embodiment, an embodiment of the present invention provides an image capturing device, where the image capturing device is used in an electronic device, and the electronic device includes: mobile terminals such as smart phones, notebook computers, digital broadcast receivers, PDAs, PADs, PMPs, navigation devices, etc., and fixed terminals such as digital TVs, desktop computers, etc.
The image acquisition device comprises a lens, an image sensor, an analog-to-digital converter and a first memory, wherein:
the lens is used for receiving incident light reflected by a scene, and the incident light becomes emergent light after passing through the lens;
the image sensor is used for receiving emergent light from the lens, converting the emergent light into charges with corresponding proportion according to the intensity of the emergent light, and forming a current value of an analog signal; wherein the image sensors form an M × N image sensor matrix, and the M, N is an integer greater than or equal to 1.
Each analog-to-digital converter in the M x N analog-to-digital converters is used for converting the current output by the image sensor corresponding to the image sensor matrix;
the first memory is used for temporarily storing the current value of the digital signal output by each analog-to-digital converter in the M analog-to-digital converters.
In the above embodiments, a color filter is further disposed between the lens and the image sensor, and the color filter generally uses three primary colors to represent a color image; the image sensor and the analog-to-digital converter are connected by a multilayer wiring.
EXAMPLE five
Based on the foregoing embodiment, an electronic device is further provided in an embodiment of the present invention, fig. 3 is a schematic diagram of a composition structure of the electronic device in the embodiment of the present invention, as shown in fig. 3, the electronic device 300 includes an image capturing device, a processor 301, a second memory 302 and a display screen 303, where the image capturing device includes a lens 201, an image sensor 202, an analog-to-digital converter 203 and a first memory 204, where:
the lens 201 is used for receiving incident light reflected by a scene, and the incident light becomes emergent light after passing through the lens;
the image sensor 202 is used for receiving emergent light from a lens, converting the emergent light into charges with corresponding proportion according to the intensity of the emergent light, and forming a current value of an analog signal;
the analog-to-digital converter 203 is configured to convert a current of an analog signal output by the image sensor into a current value of a digital signal;
the first memory 204 is used for temporarily storing the current value of the digital signal output by the analog converter.
The processor 301 is configured to transfer the current value of the digital signal stored in the first memory 204 to the second memory 302, and obtain the current value of the digital signal from the second memory 302 to display the display screen 303;
the display screen 303 is used for displaying an image to be displayed of the digital signal.
In the above embodiment, the color filter 205 is further disposed between the lens 201 and the image sensor 202, and the color filter 205 generally represents a color image by using three primary colors; the image sensor 202 and the a/D converter 203 are connected by a multilayer wiring 206.
In the embodiment of the invention, the first memory is made of a ferroelectric material.
In the first to fifth embodiments, the image capturing device provided in the embodiments of the present invention may be a product in the form of an image capturing chip in a specific implementation process. Fig. 4 is a top view of the image capturing device shown in fig. 2, fig. 5 is a schematic diagram of a composition structure of the image capturing device according to the embodiment of the present invention, fig. 6 is a schematic diagram of a composition structure of the image capturing device in the prior art, and as can be seen from fig. 4 to fig. 6, the existing image capturing chip does not have a memory (i.e., a first memory 54) inside the chip, and after the emergent light obtained through a lens 51 is processed by an image sensor 52 and an a/D converter 53, the image capturing chip obtains a digital image signal (referred to as a digital signal for short, which may be a voltage value or a current value of the digital signal), and then directly outputs the digital image signal to a display of an electronic device through a. The higher the pixel, the larger the leakage current will be (see description above). In order to reduce the leakage current, in the first to fifth embodiments, a first memory is added after the a/D converter for storing the digital signal after the a/D converter is converted, so that, as long as the intensity of the emergent light sensed by the lens in the electronic device is not changed, the current value stored in the first memory is not correspondingly changed, when the display is required, the processor in the electronic device may directly display the current value stored in the first memory on the display screen or transfer the current value stored in the first memory to a second memory of the electronic device, and then display the current value based on the current value stored in the second memory on the display screen of the electronic device. When the intensity of emergent light sensed by the lens is not changed, the current value of a new digital signal generated by the emergent light after passing through the image sensor and the analog-to-digital converter is stored in a first memory.
In the process of converting the optical signal into the electrical signal, electrons in the diode are slowly lost, thereby causing leakage current. After the photodiode generates current, if the current is sent into the A/D converter for A/D conversion immediately, the leakage current and dark current in the photodiode are both small, but in the prior art, only one A/D converter is provided, so that after the current is generated by the photodiode, a period of time is needed to wait for A/D conversion, and at this time, the leakage current occurs. As can be seen from the above description, in order to reduce the leakage current and thus obtain better image quality, the a/D converter in the image capturing device needs to have a faster conversion speed, and in fact, the conversion speed of the a/D converter is affected by the product upgrade, and therefore, it is not realistic to expect the a/D converter to have a higher conversion speed. However, the image capturing devices in the second to fourth embodiments of the present invention further include two or more analog-to-digital converters. For an M × N image sensor matrix, M image sensors may be provided for correspondingly converting current values of analog signals output by the N image sensors, so that conversion efficiency is improved by M times compared with the prior art; n image sensors can be arranged for correspondingly converting the current values of the analog signals output by the M image sensors, so that compared with the prior art, the conversion efficiency is improved by N times; it is also possible to provide M × N image sensors for converting the current values of the analog signals output from the M × N image sensors in a one-to-one correspondence, so that the conversion efficiency is improved by M × N times as compared with the prior art.
Based on the foregoing description, an embodiment of the present invention further provides an image capturing method, and fig. 7 is a schematic flow chart illustrating an implementation of the image capturing method according to the embodiment of the present invention, as shown in fig. 7, the method includes:
701, forming emergent light by incident light reflected by a scene after passing through a lens on electronic equipment;
step 702, an image sensor on the electronic device receives emergent light from a lens, and converts the emergent light into electric charges with a corresponding proportion according to the intensity of the emergent light to form a current value of an analog signal;
step 703, an analog-to-digital converter on the electronic device converts the current value of the analog signal into a current value of a digital signal;
step 704, temporarily storing the current value of the digital signal on a first memory on the electronic device;
step 705, outputting the current value of the digital signal to a display screen of an electronic device.
In the embodiment of the present invention, the method further includes: when the intensity of emergent light sensed by the lens changes, the current value of a new digital signal generated by the emergent light after passing through the image sensor and the analog-to-digital converter is stored in a first memory.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units; can be located in one place or distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, all the functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be separately regarded as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
Those of ordinary skill in the art will understand that: all or part of the steps for realizing the method embodiments can be completed by hardware related to program instructions, the program can be stored in a computer readable storage medium, and the program executes the steps comprising the method embodiments when executed; and the aforementioned storage medium includes: various media that can store program codes, such as a removable Memory device, a Read Only Memory (ROM), a magnetic disk, or an optical disk.
Alternatively, the integrated unit of the present invention may be stored in a computer-readable storage medium if it is implemented in the form of a software functional module and sold or used as a separate product. Based on such understanding, the technical solutions of the embodiments of the present invention may be essentially implemented or a part contributing to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: a removable storage device, a ROM, a magnetic or optical disk, or other various media that can store program code.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (7)
1. An image pickup device applied to an electronic apparatus, the image pickup device comprising a lens, an image sensor, a first memory, and an analog-to-digital converter, wherein:
the lens is used for receiving incident light reflected by a scene, and the incident light becomes emergent light after passing through the lens;
the image sensor is used for receiving emergent light from the lens, converting the emergent light into charges with corresponding proportion according to the intensity of the emergent light, and forming a current value of an analog signal;
the analog-to-digital converter is used for converting the current of the analog signal output by the image sensor into the current value of the digital signal;
the first memory is used for temporarily storing the current value of the digital signal output by the analog-to-digital converter, and the current value of a new digital signal generated after the emergent light passes through the image sensor and the analog-to-digital converter is stored in the first memory when the intensity of the emergent light sensed by the lens is changed; the first memory is made of ferroelectric materials and is connected with the analog-to-digital converter;
the image acquisition device is used for being connected with a processor of electronic equipment, and the processor is used for directly displaying the current value stored in the first memory on a display screen.
2. The image pickup device according to claim 1, wherein said image pickup device comprises two or more of said analog-to-digital converters.
3. The image capturing device of claim 1, wherein the image sensors form an M x N image sensor matrix, and wherein M, N is an integer greater than or equal to 1.
4. The image capturing device as claimed in claim 3, wherein the image capturing device includes N analog-to-digital converters, each of the N analog-to-digital converters being configured to convert the current output by a corresponding column of the image sensor matrix; or,
the image acquisition device comprises M analog-to-digital converters, and each analog-to-digital converter in the M analog-to-digital converters is used for converting the current output by the corresponding row in the image sensor matrix; or,
the image acquisition device comprises M x N analog-to-digital converters, and each analog-to-digital converter in the M x N analog-to-digital converters is used for converting the current output by the image sensor corresponding to the image sensor matrix.
5. An electronic device, comprising an image capture device, a processor, and a second memory, wherein the image capture device comprises a lens, an image sensor, a first memory, and an analog-to-digital converter, wherein:
the lens is used for receiving incident light reflected by a scene, and the incident light becomes emergent light after passing through the lens;
the image sensor is used for receiving emergent light from the lens, converting the emergent light into charges with corresponding proportion according to the intensity of the emergent light, and forming a current value of an analog signal;
the analog-to-digital converter is used for converting the current of the analog signal output by the image sensor into the current value of the digital signal;
the first memory is used for temporarily storing the current value of the digital signal output by the analog-to-digital converter, and is used for storing the current value of a new digital signal generated after the emergent light passes through the image sensor and the analog-to-digital converter on the first memory when the intensity of the emergent light sensed by the lens is changed, wherein the first memory is made of ferroelectric materials and is connected with the analog-to-digital converter;
the image acquisition device is used for being connected with a processor of electronic equipment, and the processor is used for directly displaying the current value stored in the first memory on a display screen.
6. An image acquisition method applied to an image acquisition device, the method comprising:
the incident light reflected by the scenery becomes emergent light after passing through a lens on the image acquisition device;
an image sensor on the image acquisition device receives emergent light from a lens and converts the emergent light into charges with corresponding proportion according to the intensity of the emergent light to form a current value of an analog signal;
an analog-to-digital converter on the image acquisition device converts the current value of the analog signal into the current value of a digital signal;
temporarily storing the current value of the digital signal and the new current value of the digital signal corresponding to the image sensor matrix on a first memory on the image acquisition device; the first memory is made of ferroelectric materials and is connected with the analog-to-digital converter;
and outputting the current value of the digital signal to a display screen of the image acquisition device.
7. The method of claim 6, further comprising: when the intensity of emergent light sensed by the lens changes, the current value of a new digital signal generated by the emergent light after passing through the image sensor and the analog-to-digital converter is stored in a first memory.
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| CN101960596A (en) * | 2008-03-31 | 2011-01-26 | 柯达公司 | Active pixel sensor having two wafers |
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