JP2017055320A5

JP2017055320A5 -

Info

Publication number: JP2017055320A5
Application number: JP2015179221A
Authority: JP
Filing date: 2015-09-11
Publication date: 2018-09-06
Anticipated expiration: 2035-09-11

Claims

A photoelectric conversion unit that generates a charge in response to incident light; a holding unit that holds the charge; an amplification transistor that outputs a signal based on the charge; and a first unit that transfers the charge from the photoelectric conversion unit to the holding unit. A plurality of pixels each having one transfer transistor and a second transfer transistor that transfers the charge from the holding unit to the amplification transistor;
In the first frame period of the plurality of frame periods for acquiring a plurality of images constituting the moving image, the charge generated in the first exposure period is accumulated,
In the second frame period subsequent to the first frame period, charges generated in a second exposure period having a different period length from the first exposure period are accumulated,
The time centroid of the first exposure period and the time centroid of the second exposure period are equal to the time centroid of the first frame period and the time centroid of the second frame period. An imaging device.

In the first frame period, the first transfer transistor simultaneously transfers the charges generated in the first exposure period from the photoelectric conversion unit to the holding unit in the plurality of pixels.
In the second frame period, the second transfer transistor sequentially transfers the charge generated in the first exposure period from the holding unit to the amplification transistor in the plurality of pixels.
2. The imaging according to claim 1, wherein, in the second frame period, the amplification transistor outputs a signal based on the charge accumulated in the first exposure period in order in the plurality of pixels. apparatus.

Each of the plurality of pixels further includes an overflow transistor that discharges the charge from the photoelectric conversion unit,
3. The imaging apparatus according to claim 1, wherein the first exposure period or the second exposure period starts when the overflow transistors of the plurality of pixels are simultaneously turned from on to off.

4. The first exposure period or the second exposure period ends when the first transfer transistors of the plurality of pixels are simultaneously turned on and off. The imaging apparatus according to item 1.

In each of the plurality of pixels, the operation in which the first transfer transistor is turned on from off and then turned off again is repeated a plurality of times, and thus occurs in the first exposure period or the second exposure period. The charge is transferred from the photoelectric conversion unit to the holding unit a plurality of times,
The first exposure period or the second exposure period is ended by an operation that is turned off at the end of the plurality of operations of the first transfer transistor. Item 4. The imaging device according to any one of Items 1 to 3.

6. The operation according to claim 5, wherein, in a plurality of operations in which the first transfer transistor is turned on from off and then turned off again, the timing at which the first transfer transistor is turned off is a constant interval. The imaging device described.

After the first exposure period or the second exposure period starts, the first transfer transistors of the plurality of pixels are turned on simultaneously from off,
Thereafter, the first transfer transistor of the plurality of pixels is turned from on to off, so that the first exposure period or the second exposure period ends. The imaging apparatus according to claim 3, wherein the transfer transistor is kept on.

Each of the plurality of pixels further includes an overflow transistor that discharges the charge from the photoelectric conversion unit,
The operation in which the overflow transistors of the plurality of pixels are simultaneously turned on and off and then turned on again is repeated a plurality of times, whereby one exposure period is divided into a plurality of times,
3. The imaging according to claim 1, wherein the first exposure period or the second exposure period is started by an operation of turning off first of the plurality of operations of the overflow transistor. apparatus.

In a part of the first exposure period, in parallel with the operation in which the photoelectric conversion units of the plurality of pixels accumulate the charges generated by incident light,
In order in the plurality of pixels, the second transfer transistor transfers the charge held by the holding unit to the amplification transistor,
The imaging device according to any one of claims 1 to 8, wherein the amplification transistor outputs a signal based on the charge in order in the plurality of pixels.

A photoelectric conversion unit that generates a charge in response to incident light; a holding unit that holds the charge; an amplification transistor that outputs a signal based on the charge; and a first unit that transfers the charge from the photoelectric conversion unit to the holding unit. A plurality of pixels each having one transfer transistor and a second transfer transistor that transfers the charge from the holding unit to the amplification transistor;
In the first frame period of the plurality of frame periods for acquiring a plurality of images constituting the moving image, the charge generated in the first exposure period is accumulated,
A plurality of accumulation operations for accumulating charges generated in a predetermined period are performed,
The plurality of accumulation operations include at least a first accumulation operation and a second accumulation operation that are different from each other in the predetermined period,
In the plurality of accumulation operations, the time center of gravity of the predetermined period is a constant interval.

The imaging apparatus according to claim 10, wherein the time centroid in each of the plurality of accumulation operations is an intermediate time between a start time of the predetermined period and an end time of the predetermined period.

The imaging apparatus according to claim 11, wherein the first transfer transistors of the plurality of pixels are simultaneously turned from on to off at the start time.

Each of the plurality of pixels further includes an overflow transistor that discharges the charge from the photoelectric conversion unit,
The imaging apparatus according to claim 11, wherein the overflow transistors of the plurality of pixels are simultaneously turned from on to off at the start time.

The imaging device according to any one of claims 11 to 13, wherein the first transfer transistors of the plurality of pixels are simultaneously turned from on to off at the end time.

A photoelectric conversion unit that generates a charge in response to incident light; a holding unit that holds the charge; an amplification transistor that outputs a signal based on the charge; and a first unit that transfers the charge from the photoelectric conversion unit to the holding unit. A plurality of pixels each having one transfer transistor and a second transfer transistor that transfers the charge from the holding unit to the amplification transistor;
Each of a plurality of frame periods for acquiring a plurality of images constituting a moving image includes an exposure period in which charge is accumulated,
In two consecutive frame periods having the same length among the plurality of frame periods, the lengths of the exposure periods are different from each other, and an intermediate time between the start time and the end time of the exposure period. The interval is the same as the length of the frame period
An imaging apparatus characterized by that.

The imaging device according to any one of claims 1 to 15 ,
An imaging system comprising: a signal processing unit that processes a signal output from the imaging device.

A photoelectric conversion unit that generates a charge in response to incident light; a holding unit that holds the charge; an amplification transistor that outputs a signal based on the charge; and a first unit that transfers the charge from the photoelectric conversion unit to the holding unit. 1. A method for driving an imaging device having a plurality of pixels, each having one transfer transistor and a second transfer transistor that transfers the charge from the holding unit to the amplification transistor,
In the first frame period of the plurality of frame periods for acquiring a plurality of images constituting the moving image, the charge generated in the first exposure period is accumulated,
In a second frame period subsequent to the first frame period, charges generated in a second exposure period having a different period length from the first exposure period are accumulated,
The time centroid of the first exposure period and the time centroid of the second exposure period are equal to the time centroid of the first frame period and the time centroid of the second frame period. A driving method of the imaging apparatus.