WO2003043317A1 - Detecteur d'images et systeme d'imagerie contenant ledit detecteur - Google Patents
Detecteur d'images et systeme d'imagerie contenant ledit detecteur Download PDFInfo
- Publication number
- WO2003043317A1 WO2003043317A1 PCT/JP2002/011301 JP0211301W WO03043317A1 WO 2003043317 A1 WO2003043317 A1 WO 2003043317A1 JP 0211301 W JP0211301 W JP 0211301W WO 03043317 A1 WO03043317 A1 WO 03043317A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- voltage
- image sensor
- input electrode
- unit
- bias voltage
- Prior art date
Links
- 238000003384 imaging method Methods 0.000 title claims abstract description 64
- 239000003990 capacitor Substances 0.000 claims abstract description 50
- 230000010354 integration Effects 0.000 claims description 42
- 238000012546 transfer Methods 0.000 claims description 24
- 238000012937 correction Methods 0.000 claims description 17
- 230000000903 blocking effect Effects 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000009529 body temperature measurement Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 239000000758 substrate Substances 0.000 description 5
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 235000010799 Cucumis sativus var sativus Nutrition 0.000 description 1
- 244000299906 Cucumis sativus var. sativus Species 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/42—Arrangements for detecting radiation specially adapted for radiation diagnosis
- A61B6/4208—Arrangements for detecting radiation specially adapted for radiation diagnosis characterised by using a particular type of detector
- A61B6/4233—Arrangements for detecting radiation specially adapted for radiation diagnosis characterised by using a particular type of detector using matrix detectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
- H01L27/146—Imager structures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
- H01L27/146—Imager structures
- H01L27/148—Charge coupled imagers
- H01L27/14806—Structural or functional details thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/30—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from X-rays
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
- H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
- H04N3/14—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by means of electrically scanned solid-state devices
- H04N3/15—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by means of electrically scanned solid-state devices for picture signal generation
- H04N3/1506—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by means of electrically scanned solid-state devices for picture signal generation with addressing of the image-sensor elements
- H04N3/1512—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by means of electrically scanned solid-state devices for picture signal generation with addressing of the image-sensor elements for MOS image-sensors, e.g. MOS-CCD
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/30—Transforming light or analogous information into electric information
- H04N5/32—Transforming X-rays
Definitions
- the present invention relates to an image sensor in which a plurality of pixels each generating a charge in response to the incidence of light are arranged, and an imaging system using the image sensor.
- the image sensor is an array of a plurality of pixels each generating charges in response to light incidence, and outputs an electrical signal corresponding to the amount of charges generated in each of the plurality of pixels.
- One of the image sensors is an intraoral sensor.
- This intraoral sensor sends an electrical signal corresponding to the amount of electric charge to the main body via a cable (approximately 2 to 3 m).
- the main body connected to the intraoral sensor displays an image generated based on the transmitted electrical signal on a display or prints an image with a printer.
- the cable connecting the intraoral sensor and the main body is also used to send a clock signal instructing the transfer of charges generated in each of the pixels and to output a bias voltage to the intraoral sensor. ing.
- the cable may be accidentally hooked when using the intraoral sensor, which may cause destruction of the intraoral sensor. This applies not only to the intraoral sensor but also to the image sensor connected to the main body via a cable.
- JP-A-11-104128 and JP-A-2001-252266 disclose an image sensor that incorporates a battery and performs wireless communication with a main body and an imaging system using the image sensor.
- the technology disclosed in these publications eliminates the need for a cable connecting the image sensor and the main body. Disclosure of the invention
- the image sensor has a built-in battery, nothing, and a saddle device.
- there is a disadvantage in terms of weight and there is a problem that the configuration of the image sensor itself becomes complicated.
- the present invention has been made to solve the above-mentioned problems, and an image sensor having an inexpensive and simple configuration that eliminates the need for a cable connecting the image sensor to the main body, and imaging using the image sensor.
- the purpose is to provide a system.
- An image sensor includes an imaging unit in which a plurality of pixels each generating a charge in response to light incidence is arranged, and a readout unit that outputs an electrical signal corresponding to the charge generated in each of the plurality of pixels.
- An image sensor having a signal input electrode for inputting a clock signal instructing transfer of charges to each of a plurality of pixels, and a bias voltage input electrode for inputting a bias voltage supplied to the imaging unit and the reading unit,
- a first voltage maintaining means configured to include a first voltage maintaining capacitor connected to the signal input electrode and maintaining the voltage of the signal input electrode; and connected to the bias voltage input electrode and biased And second voltage maintaining means configured to include a second voltage maintaining capacitor for maintaining the voltage of the voltage input electrode.
- an image sensor includes a plurality of pixels configured to include a photoelectric conversion unit that generates charges in response to light incidence and a signal input electrode that inputs a clock signal instructing transfer of charges.
- An imaging unit in which is arranged, a readout unit that outputs an electrical signal corresponding to the charges generated in each of the plurality of pixels, a bias voltage input electrode that inputs a bias voltage supplied to the photoelectric conversion unit and the readout unit,
- the clock signal input terminal that receives the clock signal from the main unit and the signal input electrode are connected in parallel with the clock signal input terminal, and the voltage of the signal input electrode is maintained.
- First voltage maintaining means comprising a first voltage maintaining capacitor And a bias voltage input terminal that receives supply of a bias voltage from the main body when connected to the main body, a bias voltage input electrode connected in parallel with the bias voltage input terminal, and a bias voltage input electrode And a second voltage maintaining means configured to include a second voltage maintaining capacitor for maintaining the voltage of the image sensor, whereby the image sensor is included in the first voltage maintaining means.
- the voltage of the signal input electrode is maintained by the one voltage maintaining capacitor, and the voltage of the bias voltage input electrode is maintained by the second voltage maintaining capacitor included in the second voltage maintaining means.
- FIG. 1 is a cross-sectional view illustrating the configuration of the image sensor 100 according to this embodiment.
- FIG. 2 is a diagram showing the configuration of the external component group 60 of the image sensor 100 according to this embodiment.
- FIG. 3 is a top view for explaining the configuration of the CCD image sensor 40 of the image sensor 100 according to the present embodiment.
- FIG. 4 is a cross-sectional view illustrating the configuration of the CCD image sensor 40 of the image sensor 100 according to this embodiment.
- FIG. 5 shows the CCD image sensor 40 of the image sensor 100 according to the present embodiment, the first signal input resistance R i, the second signal input resistance R 2, the first voltage maintaining unit 61, and the second power supply.
- 3 is a diagram showing a configuration of a pressure maintaining unit 62.
- FIG. 6 is a block diagram showing a configuration of the imaging system 300 according to the present embodiment.
- FIG. 7 shows the main body 2 00 of the imaging system 3 0 0 according to this embodiment. It is a timing chart explaining measurement of integration time.
- FIG. 1 is a cross-sectional view illustrating the configuration of the image sensor 100 according to the present embodiment.
- the image sensor 100 includes a case 10, a scintillator 20, a fiber optical plate (FOP) 30, a CCD image sensor 40, a ceramic substrate 50, and an external component group 60.
- the scintillator 20, FOP 30, CCD image sensor 40, ceramic substrate 50, and external component group 60 are covered with the case 10.
- the scintillator 20 converts X-rays incident through the case 10 into visible light.
- the FOP 30 guides the visible light converted by the scintillator 20 to the CCD image sensor 40.
- the CCD image pickup device 40 includes an image pickup unit 41 having a plurality of pixels 43 U to 43 M, N that generate charges in response to visible light guided by the FOP 30.
- the plurality of pixels 431 to 43M, N and the imaging unit 41 will be described later.
- the external component group 60 includes an integrated circuit, a resistor, a transistor, a diode, a capacitor, a connector, and the like, and is mounted on the ceramic substrate 50. These are provided on the opposite side to the X-ray incident side of the CCD image sensor 40. Details of the external component 60 are shown in FIG.
- FIG. 2 is a diagram showing the configuration of the external component group 60 of the image sensor 100 according to the present embodiment.
- the external component group 60 includes an integrated circuit 60 a, a connector 60 b, a first clock signal input resistor R, a second clock signal input resistor R 2 , a first voltage maintaining unit (first Voltage maintaining means) 6 1 and a second voltage maintaining section (second voltage maintaining means) 62 are included.
- the first voltage maintaining unit 61 includes two first voltage maintaining capacitors C 1V a and C IVb and two AC signal blocking resistors Rva and Rvb.
- the second voltage maintaining unit 62 includes a second voltage maintaining capacitor C 2V .
- the external component group 60 also includes transistors and diodes (not shown).
- the integrated circuit 60a inputs and outputs various signals.
- the connector 6 Ob is connected to a lead wire such as a flexible cable, and is connected to a main body 200 described later via the lead wire.
- a lead wire such as a flexible cable
- main body 200 described later via the lead wire.
- Other constituent elements will be described later in detail with reference to FIG. 5, and the main body 200 will be described in detail with reference to FIG.
- FIG. 3 is a top view illustrating the configuration of the CCD image sensor 40 of the image sensor 100 according to the present embodiment.
- FIG. 4 illustrates the configuration of the CCD image sensor 40 of the image sensor 100 according to the present embodiment. It is sectional drawing.
- the CCD imaging device 40 includes an imaging unit 41, a charge output unit 42, a reading unit 45, a bias voltage input electrode 46, and a signal input electrode 47.
- the imaging unit 41, the charge output unit 42, and the reading unit 45 are mainly described
- the bias voltage input electrode 46 and the signal input electrode 47 are mainly described.
- the imaging unit 41 has a plurality of pixels 43 ⁇ 43M, N arranged in M rows and N columns, and each of the plurality of pixels 43i, i to 43M, N is sensitive to the incidence of visible light converted by the scintillator 20. Charge is generated and accumulated. Further, clock signals P 1V and P 2 V instructing charge transfer are input to each of the plurality of pixels 43 1 , 1 to 43M, N.
- the charge generated in each of the plurality of pixels 43 1; 1 to 43 ⁇ and ⁇ is the clock signal P 1
- the charge output unit 42 inputs the charge output from the imaging unit 41.
- the charge output unit 42 has a plurality of regions 44 ⁇ to 44 ⁇ , and each of the plurality of regions 44 ⁇ to 44 ⁇ has a different clock for instructing charge transfer via another signal input electrode. Signals ⁇ 1 ⁇ and ⁇ 2 ⁇ are input.
- the charge input by the charge output unit 42 is output from the charge output unit 42 to the reading unit 45 by switching the logic level of the clock signals P 1H and P 2H between a high level and a low level.
- the charge output from the charge output unit 42 is input to the reading unit 45.
- Reading unit 45 you output an electric signal corresponding to the amount of charges output from the plurality of regions 4 ⁇ 44 New. That is, the readout unit 45 outputs an electrical signal corresponding to the charge generated in each of the plurality of pixels 43 to 43 ⁇ and ⁇ .
- the first bias voltage input electrode 46a is electrically connected to the imaging unit 41, and the bias voltage I SV input to the first bias voltage input electrode 46a is supplied to the imaging unit 41.
- the second bias voltage input electrode 46 b is electrically connected to the charge output unit 42, and the bias voltage I SH input to the second bias voltage input electrode 46 b is supplied to the charge output unit 42.
- the third bias voltage input electrode 46 c is electrically connected to the reading unit 45, and the bias voltage RD input to the third bias voltage input electrode 46 c is supplied to the reading unit 45.
- FIG. 3 has a plurality of pixels 43 ⁇ , ⁇ to 43M, N arranged in M rows and N columns in the image pickup unit 41, in order to simplify the explanation, FIG. A plurality of pixels 43 W to 43M, N will be described as one pixel 43.
- FIG. 4 a part of the configuration is omitted for simplification of description, and the region under the bias voltage input electrode 46 and the bias voltage input electrode 46 and the signal input electrode 47 and the signal input electrode 47 are omitted. The lower area will be described.
- the CCD image sensor 40 includes a p + type semiconductor substrate 48 a, a p layer 48 b, a ⁇ layer 48 c, a first n + layer 48 d, a second n + layer 48 e, and a third n + layer 48 f. Is included.
- the p + type semiconductor substrate 48 a is grounded, and a p layer 48 b is formed on the surface side (light incident side) of the p + layer 48 a.
- a ⁇ ⁇ layer 48 c is formed on the surface side of the p layer 48 b.
- the first n + layer 48d, the second n + layer 48e, and the third n + layer 48f are formed so as to be surrounded by the ⁇ ⁇ layer 48c.
- the first n + layer 48d A first bias voltage input electrode 4 6 a is connected to the surface side, and a second bias voltage input electrode 4 6 b is connected to the surface side of the second n + layer 48 8 e, and a third n The third bias voltage input electrode 4 6 c is connected to the surface side of the + layer 48 f.
- the first bias voltage input electrode 4 6 a connected to the surface side of the first n + layer 48 d receives the bias voltage I S V supplied to the imaging unit 41.
- a bias voltage ISV having a predetermined voltage value is input to the first bias voltage input electrode 46 a during charge transfer, and a predetermined voltage value included in the bias voltage ISV input during charge transfer during imaging.
- a bias voltage ISV having a lower voltage value (hereinafter referred to as a voltage value during imaging) is input.
- a second bias voltage input electrode connected to the surface side of the second n + layer 4 8 e
- a bias voltage ISH having a predetermined voltage value is input to the second bias voltage input electrode 46 b at the time of charge transfer, and a predetermined voltage value of the bias voltage ISH input at the time of charge transfer at the time of imaging.
- a bias voltage ISH having a lower voltage value (hereinafter referred to as a voltage value at the time of imaging) is input.
- the third bias voltage input electrode 46 c connected to the surface side of the third n + layer 48 f receives a bias voltage RD having a predetermined voltage value supplied to the reading unit 45.
- a bias voltage RD having a predetermined voltage value is input to the third bias voltage input electrode 46 c at the time of charge transfer, and a predetermined voltage value of the bias voltage RD input at the time of charge transfer at the time of imaging.
- a bias voltage RD having a lower voltage value hereinafter referred to as a voltage value during imaging
- the bias voltage during imaging is set to be lower than the bias voltage during charge transfer.
- the first bias voltage input electrode 4 6 a and the second bias voltage input electrode 4 6 b And the third bias voltage input electrode 4 6 c may have the same voltage value according to the voltage input to both the imaging and the charge transfer.
- a first signal input electrode 47a for inputting a clock signal P1V that instructs the pixel 43 to transfer charges is provided via an insulating film.
- the clock signal P 1 V is switched between a high level and a low level when transferring charges.
- the second signal input electrode 47 b for inputting the clock signal ⁇ 2 V for instructing the charge transfer to the pixel 43 is provided on the surface side of the ⁇ layer 48 c through the insulating film. It is provided.
- the clock signal P 2 V is switched between a high level and a low level when transferring charges.
- the first signal input electrode 47a is supplied with a clock signal PIV whose logic level is low during imaging. Further, the clock signal P 2 V having a logic level of low during imaging is input to the second signal input electrode 47 b.
- the image sensor 10 0 including this C CD image sensor 40 is removed from the main body 2 0 0 and performs imaging.
- Two conditions are necessary to take an image by removing the image sensor 100 from the main body 200.
- the first condition is that the clock signal PIV whose logic level is low level is input to the first signal input electrode 47a, and that the clock signal P2 whose logic level is low level is input to the second signal input electrode 47b.
- the second condition is to input the bias voltage ISV having the voltage value at the time of integration to the first bias voltage input electrode 4 6 a and the second bias voltage input electrode 4
- the bias voltage ISH having the voltage value at the time of imaging is input to 6b
- the bias voltage RD having the voltage value at the time of imaging is input to the third bias voltage input electrode 46c.
- the image sensor 100 according to this embodiment is configured to satisfy the two conditions described above at the time of imaging. The configuration will be described with reference to FIG.
- FIG. 5 shows the CCD image sensor 40 of the image sensor 100 according to the present embodiment, the first signal input resistance R i, the second signal input resistance R 2 , the first voltage maintaining unit 61, and the second electric current.
- 3 is a diagram showing a configuration of a pressure maintaining unit 62.
- FIG. Figure 5 shows the CC as viewed from the outside. The equivalent circuit of D image sensor 40 is shown. In the description of FIG. 5, the bias is applied without using the first bias voltage input electrode 46a, the second bias voltage input electrode 46b, and the third bias voltage input electrode 46c shown in FIG. This will be described using the voltage input electrode 46.
- CCD imaging device 4 shown in FIG. 5 0 includes two first capacitor C i a as an equivalent circuit of a pixel 4 3, the C lb, the second as the equivalent circuit of the bias voltage input electrode 4 6 under the region and a capacitor C 2 and Daiodo D.
- the first capacitor Cla has one end connected to the first signal input electrode 47a and the other end grounded.
- the other first capacitor C ib has one end connected to the second signal input electrode 47 b and the other end grounded.
- the second capacitor C 2 has one end connected to the bias voltage input electrode 46 and the other end grounded.
- the force sword side is connected to the bias voltage input electrode 46, and the node side is grounded.
- One end of the first signal input resistor Ri is connected to the first signal input electrode 47a, and the other end is connected to the terminal 63a which is an input end of the clock signal P1V.
- the clock signal P I V input to the terminal 63a is input to the first signal input electrode 47a via the first signal input resistor Ri.
- One end of the AC signal blocking resistor R Va included in the first voltage maintaining unit 61 is connected to a connection point A between the first signal input resistor and the terminal 63a, and the other end is connected to the first voltage. It is connected to the maintenance capacitor C lVa. That is, an AC signal blocking resistor Rv a is connected between the capacitor C and the terminal 6 3 a for the first voltage maintaining.
- the first voltage maintaining capacitor C 1Va has one end connected to the AC signal blocking resistor R Va and the other end grounded. This first voltage maintaining capacitor C lVa is the image sensor
- the first signal input electrode 4 7 a is maintained at a voltage having the same voltage value as the voltage value of the clock signal P 1 V whose logic level is the mouth level. ing.
- the first voltage maintaining capacitor C1Va preferably has a capacity of 100 times or more that of the first capacitor Cla .
- the second signal input resistor R 2 has one end connected to the second signal input electrode 47 b and the other end connected to a terminal 63 b that is an input end of the clock signal P 2 V.
- the clock signal P 2 V input to the terminal 6 3 is input to the second signal input electrode 4 7 b via the first signal input resistor R 2 .
- Another AC signal blocking resistance Rvt has one end connected to a connection point B which is between the second signal input resistor R 2 and the terminal 6 3 b, near the other end first voltage maintaining Another capacitor C connected to ivb. That is, the other AC signal blocking resistor Rvb is connected between another first voltage maintaining capacitor C 1Vb and the terminal 6 3 b.
- the other first voltage maintaining capacitor C 1Vb has one end connected to the other AC signal blocking resistor Rvb and the other end grounded.
- the other first voltage maintaining capacitor C ivb is connected to the second signal input electrode 4 7 b by a clock signal P 2 V whose logic level is the input level to remove the image sensor 100 and perform imaging. The voltage is maintained at a voltage having the same voltage value.
- the other first voltage maintaining capacitor C has a capacity of 100 times or more that of the other first capacitor C ib. Have.
- the first voltage maintaining unit 61 including the two first voltage maintaining capacitors C 1Va and C 1Vb, even if the image sensor 1 0 0 is detached from the main body 2 0 0 0
- the signal input electrode 4 7a can be maintained at a voltage having the same voltage value as that of the clock signal PIV whose logic level is low level
- the second signal input electrode 4 7b can be maintained at the clock signal P 2 V whose logic level is low level.
- the image sensor 10 0 0 includes two AC signal blocking resistors R Has Va and Rvb.
- the AC signal blocking resistance R Va has a resistance value that is at least 100 times greater than the first signal input resistance R i.
- the other AC signal blocking resistor Rvb is the second signal input resistor R 2 1 Has a resistance value of 0 ° or more.
- the first voltage maintaining unit 61 includes not only the two first voltage maintaining capacitors C 1Va and C ivb but also the two AC signal blocking resistors R Va and Rvb, so that the image sensor 10 0 Even if 0 is removed from the main body 2 0 0, the first signal input electrode 4 7 a can be maintained at a voltage having the same voltage value as the voltage value of the clock signal P 1 V whose logic level is low level. The clock signal P 1 V is accurately input to the first signal input electrode 4 7 a.
- the second signal input electrode 47 b can be maintained at a voltage having the same voltage value as the voltage value of the clock signal p 2 V whose logic level is the mouth level. Signal P 2 V is accurately input to the second signal input electrode 47 b.
- the second voltage maintaining unit 62 has a second voltage maintaining capacitor C 2V .
- the second voltage maintenance capacitor C 2V has one end connected to the connection point C between the bias voltage input electrode 46 and the terminal 64 that is the input end of the bias voltage ISH, ISV, RD, and the other end grounded Has been.
- This second voltage maintaining capacitor C 2V is used to remove the image sensor 100 and use a voltage having the same voltage value as the bias voltages ISH, ISV, RD at the time of imaging on the bias voltage input electrode 46. To maintain. To maintain the voltage of the bias voltage input electrode 4 6, preferably, the second voltage maintaining capacitor C 2V has a 1 0 0 or more times the capacity of the second capacitor C 2.
- the bias can be obtained even if the image sensor 100 is removed from the body unit 200.
- the voltage input electrode 46 can be maintained at a voltage having the same voltage value as the bias voltages ISH, ISV, and RD.
- the image sensor 10 100 can perform imaging alone, and does not require a battery or a wireless device.
- an image sensor having an inexpensive and simple configuration can be obtained.
- This image sensor 1 0 0 is connected to the main body 2 0 0 after imaging.
- 0 0 reads out an electrical signal corresponding to the amount of charge generated in each of a plurality of pixels 4 S ⁇ r ⁇ A 3 ⁇ and ⁇ , and generates image data based on the read-out electrical signal.
- the generated image data is printed as an image on the printer or displayed on the display.
- FIG. 6 is a block diagram showing the configuration of the imaging system 300 according to the present embodiment.
- the imaging system 300 includes an image sensor 100 and a main body unit 200.
- the main unit 2 0 0 includes an interface 2 0 1, a power supply 2 0 2, a connection 2 1 0, an image generation unit (image generation means) 2 2 0, a timer (time measurement means) 2 3 0, a temperature measurement section (temperature Measurement unit) 2 4 0, storage unit (storage unit) 2 5 0, calculation unit (calculation unit) 2 6 0, correction unit (correction unit) 2 7 0, clock signal output unit (clock signal output unit) 2 8 0 and bias voltage output unit (bias voltage output means) 29.
- the image sensor 10 0 0 is connected to a connection portion 2 1 0 provided on the main body 2 0 0.
- connection portion 2 10 is a lead wire such as a flexible cable, and is connected to the image sensor 100 via a terminal provided at the tip of the lead wire. Further, the connection part 2 1 0 is connected to the interface 2 0 1. This connection 2 1 0 An electric signal corresponding to the amount of electric charge generated in each of the plurality of pixels 4 3 U to 4 3 ⁇ and ⁇ is led to the interface 2 0 1.
- connection unit 2 1 0 guides the clock signals ⁇ 1 V, ⁇ 2 V and bias voltages I S V, I S H, and R D output from the interface 2 0 1 to the image sensor 1 100.
- the interface 2 0 1 is connected to the image generation unit 2 2 0, the timer 2 3 0, the temperature measurement unit 2 4 0, the clock signal output unit 2 80 and the bias voltage output unit 2 9 0, and the image sensor 1 0
- the signal input from 0 through the connection unit 2 1 0 is output to the image generation unit 2 2 0, the timer 2 3 0 and the temperature measurement unit 2 4 0, and the signal input from the clock signal output unit 2 80 and
- the bias voltage input from the bias voltage output unit 29 0 is output to the image sensor 100 through the connection unit 2 10.
- the image generation unit 220 receives an electric signal corresponding to the amount of charge generated in each of the plurality of pixels 4 3 U to 4 3 M, N via the connection unit 2 10 and the interface 2 0 1.
- the image generation unit 220 generates image data based on the electrical signal.
- the image generation unit 2 2 0 is connected to the correction unit 2 70 0 and outputs the generated image data to the correction unit 2 70.
- the timer 2 3 0 obtains the value of the integration time, which is the time during which the input of the clock signals P 1 V and P 2 V to the signal input electrode 47 is stopped.
- This integration time is measured using an integration start switch (not shown) and an integration end switch (not shown) provided in the main unit 200, and integration starts when the integration start switch is pressed. The integration is terminated when the integration end switch is pressed.
- FIG. 7 is a timing chart for explaining the measurement of the integration time in the main body unit 200 of the imaging system 300 according to the present embodiment.
- the main body unit 200 is provided with an integration start switch and an integration end switch.
- the integration start switch is pressed by the user or the like. This When the switch is pressed, the clock signals PIV and P 2 V are not input to the signal input electrode 47. At this time, the voltage of the signal input electrode 47 due to the two first voltage maintaining capacitors C 1Va and C ivb is the same as the clock signals P 1 V and P 2 V whose logic level is L (low) level. A voltage having a voltage value is maintained.
- the X-ray incidence to the image sensor 100 is completed at time t 3b .
- the image sensor 1 0 0 is connected to the connection unit 2 1 0.
- the integration end switch is pushed by the user etc. at time t lb.
- the clock signals PIV and P 2 V are input to the signal input electrode 47.
- the period from time t la to time t lb is the integration time.
- the integration time is the time different from the imaging time and a period from the detachment time and time is a period from time to time t 2b to time. Note that the period from time t la to time t lb is also a period during which charges generated by dark current are accumulated. Timer 2 3 0 measures this integration time.
- the timer 2 3 0 is connected to the connection 2 after the image sensor 1 0 0 is removed from the connection 2 1 0. Measurement may be performed using the time until connection to 10 as the integration time. In the case of this method, the period from time t 2a to time t 2b shown in FIG. 7 coincides with the period from time to day t lb.
- the integration time measured in this way is converted to integration time value data.
- the timer 2 3 0 is connected to the calculation unit 2 60, and outputs data of the measured integration time value to the calculation unit 2 6 0.
- the temperature measurement unit 2 4 0 has the image sensor 1 0 0 removed from the connection 2 1 0. Measure the temperature of the image sensor 1 0 0 until it is connected to the connection 2 10. That is, the temperature of the image sensor 100 during the removal time is measured. For example, the temperature measurement unit 2 4 0 inputs connection information indicating whether or not the image sensor 1 0 0 is connected to the connection unit 2 1 0 via the interface 2 0 1, and the image sensor 1 0 0 The temperature measurement is started by detecting the removal, and the temperature measurement is terminated by detecting that the image sensor 100 is connected. The measured temperature is converted to temperature value data. In this case, the temperature measuring unit 2400 uses the ambient temperature of the main body 2200 as the temperature of the image sensor 100.
- the temperature measurement unit 2 40 is connected to the calculation unit 2 60 and outputs data of the measured temperature value to the calculation unit 2 60.
- the storage unit 250 stores dark current image data corresponding to the amount of charge generated in each of the plurality of pixels 4 to 3 M, N due to the saddle current. For example, image data corresponding to the amount of charge generated by the dark current flowing at that time is stored so that light does not enter the image sensor 100.
- the storage unit 2550 is connected to the calculation unit 2600 and outputs the stored dark current image data to the calculation unit 2600.
- the calculation unit 260 has a function that uses the temperature of the image sensor 100 and the integration time, which is the time when the input of the clock signals PIV and P2 V to the signal input electrode 47 is stopped, as variables. I remember it. Further, the calculation unit 2600 calculates corrected image data based on this function and the dark current image data stored by the storage unit 2550. At this time, the calculation unit 2 6 0 receives the integration time value data output from the timer 2 3 0 and the temperature value data output from the temperature measurement unit 2 4 0, and stores the stored function. Substitute the value of the integration time measured at timer 230 and the value of the temperature measured at temperature measurement unit 240 to calculate the captured image data. Further, the calculation unit 2 60 is connected to the correction unit 2 70 and outputs the calculated corrected image data to the correction unit 2 70.
- the correction unit 2 70 corrects the image data generated by the image generation unit 2 20 based on the corrected image data calculated by the calculation unit 2 60. After correction, the correction unit 2 7 0 The corrected image data is output to a printer or other device.
- the clock signal output unit 2 80 outputs clock signals PIV and P 2 V to the signal input electrode 47 of the image sensor 1 0 0 via the interface 2 0 1 and the connection unit 2 1 0.
- the bias voltage output unit 29 0 outputs the bias voltages ISH, ISV, and RD to the bias voltage input electrode 46 of the image sensor 10 0 0 via the interface 2 0 1 and the connection unit 2 1 0.
- the clock signals P 1 V and P 2 V output from this clock signal output unit 28 0 and the bias voltages ISH, ISV and RD output from the bias voltage output unit 29 0 are By being input to the imaging element 40, the image sensor 100 can transfer charges generated in the plurality of pixels 4 3 ⁇ , ⁇ to 4 3 M, N, and the plurality of pixels 4 3 U to 4 4 It is possible to output an electrical signal corresponding to the charge generated in each of 3 M and N.
- the power source 2 0 2 supplies power to each element of the main body 2 0 0 and the image sensor 1 100.
- the main body unit 200 is provided with an integration start switch and an integration end switch.
- the integration time measurement is started by the timer 230 when the user presses the integration start switch provided on the main body unit 200. Thereafter, the image sensor 100 before imaging is removed from the connecting part 2 10 of the main body 2 200. At this time, temperature measurement is started by the temperature measuring unit 240. Thereafter, the image sensor 10 0 0 that has finished imaging is connected to the connection part 2 1 0 of the main body 2 0 0. At this time, the temperature measurement by the temperature measurement unit 2400 is completed.
- the integration end switch provided in the main body unit 200
- the measurement of the integration time with the timer 230 is completed.
- the clock signals PIV and P 2 V are output from the clock signal output unit 28 0 to the signal input electrode 47 of the image sensor 100 0, and the bias sensor output unit 29 0 outputs the image sensor.
- Bias voltage ISH, ISV, RD force is output to 100 0 bias voltage input electrode 46.
- the charges generated in each of the plurality of pixels 4 3 u to 4 3 ⁇ and ⁇ Are transferred, and electrical signals corresponding to the charges generated in the plurality of pixels 4 3; to 4 3 and ⁇ are output.
- the output electrical signal is input to the image generation unit 2 2 0 via the interface 2 0 1.
- the image generation unit 220 generates image data based on the input electrical signal.
- the image data generated by the image generation unit 2 20 is output to the correction unit 2 70.
- the data of the integration time value measured by the timer 2 3 0 is output to the calculation unit 2 60
- the data of the temperature value measured by the temperature measurement unit 2 4 0 is output to the calculation unit 2 60
- the dark current image data stored in the storage unit 2550 is output to the calculation unit 2600.
- the calculation unit 2 60 generates correction image data from the integration time value data, the temperature value data, the ⁇ current image data, and the stored function, and the correction image data is converted into the correction unit 2 7 0. Is output.
- the image data output from the image generation unit 220 is corrected by the correction unit 27 0 using this corrected image data. After that, the corrected image data is output to a printer or other device.
- the imaging system 300 it is possible to generate image data using the image sensor 100.
- the corrected image data can be calculated based on the measured integration time, and the image data can be corrected based on the corrected image data.
- the corrected image data can be calculated based on the measured temperature, and the image data can be corrected based on the corrected image data.
- the calculation unit 2 60 has dark current data and integration time value data. This is not limited to this, and the calculation unit 2 6 0 is the dark current image data and the integration time #: data, ⁇ current Correction data may be calculated based on only data and temperature value data, or dark current data.
- the temperature measuring unit 2400 measures the ambient temperature of the main body unit 200, but the present invention is not limited to this, and means for measuring the temperature in the image sensor 100 is provided. It is also possible to provide the measured value data to the main body unit 200.
- the charge transfer method is a two-phase method.
- the charge transfer method is not limited to this, and a single-phase transfer method or a three-phase or more transfer method may be used.
- as many voltage maintaining capacitors as are required for each transfer method are required.
- three voltage maintaining capacitors are required for the three-phase method
- four voltage maintaining capacitors are required for the four-phase method
- one voltage maintaining capacitor is required for the single-phase method.
- a capacitor is required.
- the image sensor of the present invention and the imaging system using the image sensor can be used, for example, in an oral X-ray examination.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Physics & Mathematics (AREA)
- Medical Informatics (AREA)
- Electromagnetism (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Pathology (AREA)
- Animal Behavior & Ethology (AREA)
- Optics & Photonics (AREA)
- High Energy & Nuclear Physics (AREA)
- Radiology & Medical Imaging (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Biophysics (AREA)
- Mathematical Physics (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
- Measurement Of Radiation (AREA)
- Facsimile Heads (AREA)
- Facsimile Scanning Arrangements (AREA)
- Solid State Image Pick-Up Elements (AREA)
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/466,336 US7091465B2 (en) | 2001-11-15 | 2002-10-30 | Image sensor with a voltage maintaining capacitor and an ac-signal blocking resistor, and imaging system comprising the image sensor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001350603A JP3778844B2 (ja) | 2001-11-15 | 2001-11-15 | イメージセンサおよびそのイメージセンサを用いた撮像システム |
JP2001-350603 | 2001-11-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003043317A1 true WO2003043317A1 (fr) | 2003-05-22 |
Family
ID=19163072
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/011301 WO2003043317A1 (fr) | 2001-11-15 | 2002-10-30 | Detecteur d'images et systeme d'imagerie contenant ledit detecteur |
Country Status (3)
Country | Link |
---|---|
US (1) | US7091465B2 (ja) |
JP (1) | JP3778844B2 (ja) |
WO (1) | WO2003043317A1 (ja) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7123046B2 (en) * | 2002-02-13 | 2006-10-17 | Micron Technology, Inc | Apparatus for adaptively adjusting a data receiver |
US7563026B2 (en) * | 2005-09-08 | 2009-07-21 | Schick Technologies, Inc. | Flexible intra-oral x-ray imaging device |
JP4789245B2 (ja) * | 2006-01-13 | 2011-10-12 | 株式会社日立メディコ | X線画像診断装置 |
JP2010078542A (ja) * | 2008-09-29 | 2010-04-08 | Fujifilm Corp | 放射線検出装置 |
US8366318B2 (en) | 2009-07-17 | 2013-02-05 | Dental Imaging Technologies Corporation | Intraoral X-ray sensor with embedded standard computer interface |
EP2180343B1 (en) | 2008-10-27 | 2018-07-25 | Dental Imaging Technologies Corporation | System and method of x-ray detection with a sensor |
US9492129B2 (en) * | 2008-10-27 | 2016-11-15 | Dental Imaging Technologies Corporation | Triggering of intraoral X-ray sensor using pixel array sub-sampling |
JP5833816B2 (ja) * | 2010-10-27 | 2015-12-16 | 株式会社アールエフ | 放射線撮像装置 |
JP6028365B2 (ja) * | 2012-03-29 | 2016-11-16 | 株式会社ニコン | 撮像装置及びプログラム |
JP6028363B2 (ja) * | 2012-03-29 | 2016-11-16 | 株式会社ニコン | 撮像装置、及びプログラム |
CN109644246B (zh) * | 2016-08-23 | 2022-01-14 | 株式会社尼康 | 摄像元件以及摄像系统 |
US10213180B2 (en) * | 2016-09-14 | 2019-02-26 | Dental Imaging Technologies Corporation | Multiple-dimension imaging sensor with operation based on magnetic field detection |
US10932733B2 (en) | 2016-09-14 | 2021-03-02 | Dental Imaging Technologies Corporation | Multiple-dimension imaging sensor with operation based on movement detection |
US10595797B2 (en) * | 2017-01-31 | 2020-03-24 | Teledyne E2V Semiconductors Sas | Dental intraoral radiological image sensor |
CN108318907B (zh) * | 2018-02-01 | 2019-10-01 | 北京京东方光电科技有限公司 | X射线探测面板及其制造方法和x射线探测装置 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07236093A (ja) * | 1994-02-21 | 1995-09-05 | Toshiba Medical Eng Co Ltd | 撮像装置 |
EP0904734A2 (en) * | 1997-09-30 | 1999-03-31 | Kabushikikaisha Morita Seisakusho | Panoramic radiographic apparatus and digital sensor cassette used for same apparatus |
JP2000254115A (ja) * | 1999-03-10 | 2000-09-19 | Toshiba Corp | 放射線検出器 |
US6201249B1 (en) * | 1997-10-16 | 2001-03-13 | Canon Kabushiki Kaisha | X-ray imaging system |
JP2001252266A (ja) * | 2000-03-10 | 2001-09-18 | Matsushita Electric Ind Co Ltd | X線撮影装置 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3650515B2 (ja) | 1997-09-30 | 2005-05-18 | 株式会社モリタ製作所 | パノラマx線撮影装置用デジタルセンサカセット |
TW503620B (en) * | 2000-02-04 | 2002-09-21 | Sanyo Electric Co | Drive apparatus for CCD image sensor |
-
2001
- 2001-11-15 JP JP2001350603A patent/JP3778844B2/ja not_active Expired - Fee Related
-
2002
- 2002-10-30 WO PCT/JP2002/011301 patent/WO2003043317A1/ja active Application Filing
- 2002-10-30 US US10/466,336 patent/US7091465B2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07236093A (ja) * | 1994-02-21 | 1995-09-05 | Toshiba Medical Eng Co Ltd | 撮像装置 |
EP0904734A2 (en) * | 1997-09-30 | 1999-03-31 | Kabushikikaisha Morita Seisakusho | Panoramic radiographic apparatus and digital sensor cassette used for same apparatus |
US6201249B1 (en) * | 1997-10-16 | 2001-03-13 | Canon Kabushiki Kaisha | X-ray imaging system |
JP2000254115A (ja) * | 1999-03-10 | 2000-09-19 | Toshiba Corp | 放射線検出器 |
JP2001252266A (ja) * | 2000-03-10 | 2001-09-18 | Matsushita Electric Ind Co Ltd | X線撮影装置 |
Also Published As
Publication number | Publication date |
---|---|
JP2003153094A (ja) | 2003-05-23 |
US7091465B2 (en) | 2006-08-15 |
US20040238721A1 (en) | 2004-12-02 |
JP3778844B2 (ja) | 2006-05-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2003043317A1 (fr) | Detecteur d'images et systeme d'imagerie contenant ledit detecteur | |
JP6491434B2 (ja) | 放射線撮像装置及び放射線検出システム | |
JP4819561B2 (ja) | 固体撮像装置 | |
JP5005179B2 (ja) | 固体撮像装置 | |
CN110623682A (zh) | 放射线摄像装置及控制方法、放射线摄像系统及存储介质 | |
TW201117612A (en) | Solid-state image sensing device, analog-digital conversion method of solid-state image sensing device, and electronic apparatus | |
JP2009239694A5 (ja) | ||
JP2000510969A (ja) | 電気光学表示装置 | |
JP2009278236A (ja) | 固体撮像装置 | |
JP2008236158A (ja) | 撮像モジュール | |
JP4825116B2 (ja) | 固体撮像装置及び撮像方法 | |
US8360961B2 (en) | Capsule-type endoscope having sensor and communication method thereof | |
JP5988735B2 (ja) | 放射線撮像装置の制御方法、放射線撮像装置、及び、放射線撮像システム | |
JP3798462B2 (ja) | 固体撮像装置 | |
JP4800045B2 (ja) | 固体撮像装置 | |
JP2011066846A (ja) | A/dコンバータ | |
JP4633991B2 (ja) | 信号読出回路 | |
JP4833010B2 (ja) | 固体撮像装置 | |
JP4717786B2 (ja) | 固体撮像装置 | |
JP6600403B2 (ja) | 放射線検出装置、その制御方法、放射線撮影装置、およびプログラム | |
JP2009177601A (ja) | 撮像装置 | |
WO2004049701A1 (ja) | 撮像装置 | |
JPH0515346B2 (ja) | ||
JPH04267672A (ja) | 画像読取方法及びその装置 | |
JP2003244563A (ja) | 撮像装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SD SE SG SI SK SL TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LU MC NL PT SE SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 10466336 Country of ref document: US |
|
122 | Ep: pct application non-entry in european phase |