# US 7,408,167 B2 · Imaging apparatus, radiation imaging apparatus, and radiation imaging system

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- Number: US 7,408,167 B2
- Document ID: US7408167B2
- Status: Granted
- Kind: B2
- Application number: 11/696,781
- Filed: 2007-04-05
- Published: 2007-12-20
- Granted: 2008-08-05
- Earliest claimed: 2006-04-27
- Assignees: Canon Kabushiki Kaisha
- Inventors: Toshio Kameshima; Tadao Endo; Tomoyuki Yagi; Katsuro Takenaka; Keigo Yokoyama
- Web page: https://patentgrep.com/patent/US7408167B2

## CPC

- H04N 25/677: for reducing the column or line fixed pattern noise
- H04N 23/30: for generating image signals from X-rays
- H04N 25/78: Readout circuits for addressed sensors, e.g. output amplifiers or A/D converters
- H10F 39/1898: {Indirect radiation image sensors, e.g. using luminescent members}
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION

## Abstract

An imaging apparatus capable of reducing a line noise artifact in a simple configuration without complicated operations includes: a plurality of pixels arranged in row and column directions and having a photoelectric conversion element and a switch element; a plurality of signal wirings connected to the plurality of switch elements in the column direction; a read out circuit connected to the plurality of signal wirings; and a power source for supplying a voltage to the photoelectric conversion element. With the configuration, the plurality of pixels are classified into a plurality of groups, and the power sources are independently provided for each of the plurality of groups.

## Claims

### Claim 1

An imaging apparatus, comprising:
a plurality of pixels arranged in row and column directions and each having a conversion element for converting radiation or light into an electrical signal and a switch element;
a plurality of signal wirings connected to the plurality of switch elements in the column direction;
a read out circuit connected to the plurality of signal wirings; and
a power source for supplying a voltage to the conversion element, wherein
the power source has a plurality of independent power sources, and
the plurality of pixels are classified into a plurality of groups and the plurality of independent power sources are independently provided for each of the plurality of groups.

### Claim 2 (depends on 1)

The imaging apparatus according to claim 1, wherein
the power source is a reference power source of the read out circuit.

### Claim 3 (depends on 2)

The imaging apparatus according to claim 2, wherein
the read out circuit comprises a plurality of amplifiers corresponding to the plurality of signal wirings, and the power source is a reference power source of the amplifier.

### Claim 4 (depends on 3)

The imaging apparatus according to claim 3, wherein
the read out circuit comprises a plurality of operational amplifiers corresponding to the plurality of signal wirings, and the operational amplifiers has one input terminal connected to the signal wiring, and another input terminal connected to the reference power source.

### Claim 5 (depends on 4)

The imaging apparatus according to claim 4, wherein
the operational amplifier configures a charge readout amplifier in which a charge storage capacitor is connected to an input terminal to which the signal wiring is connected.

### Claim 6 (depends on 1)

The imaging apparatus according to claim 1, wherein
the power source is a bias power source of the conversion element.

### Claim 7 (depends on 1)

The imaging apparatus according to claim 1, wherein
the pixels are classified into an odd column group and an even column group, and the plurality of independent power sources are provided independently as the odd column group and the even column group.

### Claim 8 (depends on 1)

The imaging apparatus according to claim 1, wherein
the plurality of independent power sources have respective voltage sources and operational amplifiers.

### Claim 9 (depends on 1)

A radiation imaging system, comprising:
the imaging apparatus according to claim 1; and
a radiation generating unit for generating radiation.