# US 2016/0366357 A1 · Image sensing device and read-out method of the same

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- Number: US 2016/0366357 A1
- Document ID: US20160366357A1
- Status: Published application
- Kind: A1
- Application number: 14/921,092
- Filed: 2015-10-23
- Published: 2016-12-15
- Earliest claimed: 2015-06-09
- Assignees: SK hynix Inc.
- Applicants: SK hynix Inc.
- Inventors: Min-Seok SHIN
- Web page: https://patentgrep.com/patent/US20160366357A1

## CPC

- H04N 25/76: Addressed sensors, e.g. MOS or CMOS sensors
- H04N 25/00: Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N 25/633: by using optical black pixels
- H04N 25/671: for non-uniformity detection or correction
- H04N 25/673: by using reference sources
- H04N 25/77: Pixel circuitry, e.g. memories, A/D converters, pixel amplifiers, shared circuits or shared components
- H04N 25/78: Readout circuits for addressed sensors, e.g. output amplifiers or A/D converters
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

An image sensing device includes a pixel suitable for outputting a pixel signal through a read-out line during a read-out section and a precharge block suitable for precharging the read-out line to a voltage level corresponding to an initial voltage level of the pixel signal during a row non-selection section adjacent to the read-out section.

## Claims

### Claim 1

An image sensing device, comprising:
a pixel suitable for outputting a pixel signal through a read-out line during a read-out section; and
a precharge block suitable for precharging the read-out line to a voltage level corresponding to an initial voltage level of the pixel signal during a row non-selection section adjacent to the read-out section.

### Claim 2 (depends on 1)

The image sensing device of claim 1, wherein the initial voltage level corresponds to a voltage level of a reset signal included in the pixel signal.

### Claim 3 (depends on 1)

The image sensing device of claim 1, wherein the read-out section is subsequent to the row non-selection section.

### Claim 4 (depends on 1)

The image sensing device of claim 1, wherein the precharge block includes a replica circuit that replicates the pixel.

### Claim 5

An image sensing device, comprising:
an active pixel coupled to a column line, and suitable for outputting a pixel signal through a column line during a read-out section; and
a dummy pixel coupled to the column line, and suitable for precharging the column line to a voltage level corresponding to an initial voltage level of the pixel signal during a row non-selection section adjacent to the read-out section.

### Claim 6 (depends on 5)

The image sensing device of claim 5, wherein the read-out section is subsequent to the row non-selection section.

### Claim 7 (depends on 5)

The image sensing device of claim 5, wherein the active pixel includes:
a photo diode;
a first coupling block suitable for coupling the photo diode to a diffusion node in response to a first control signal;
a second coupling block suitable for coupling the diffusion node to a high voltage node in response to a second control signal;
a third coupling block suitable for coupling the high voltage node to a selection node based on a voltage level charged in the diffusion node; and
a fourth coupling block suitable for coupling the selection node to the column line in response to a third control signal.

### Claim 8 (depends on 7)

The image sensing device of claim 7, wherein the second control signal is enabled ahead of the third control signal.

### Claim 9 (depends on 8)

The image sensing device of claim 8, wherein an enabling section of the second control signal and an enabling section of the third control signal partially overlap each other.

### Claim 10 (depends on 7)

The image sensing device of claim 7, wherein the dummy pixel includes:
a dummy photo diode;
a first dummy coupling block suitable for coupling the dummy photo diode to a dummy floating diffusion node in response to a first dummy control signal;
a second dummy coupling block suitable for coupling the dummy floating diffusion node to the high voltage node in response to a second dummy control signal;
a third dummy coupling block suitable for coupling the high voltage node to a dummy selection node based on a voltage level charged in the dummy floating diffusion node; and
a fourth dummy coupling block suitable for coupling the dummy selection node to the column line in response to a third dummy control signal.

### Claim 11 (depends on 10)

The image sensing device of claim 10, wherein the first dummy control signal includes a signal fixed with a first voltage level, and the second dummy control signal includes a signal fixed with a second voltage level.

### Claim 12 (depends on 11)

The image sensing device of claim 11, wherein the first voltage level corresponds to a low voltage level, and the second voltage level corresponds to a high voltage level.

### Claim 13 (depends on 10)

The image sensing device of claim 10, wherein the third dummy control signal is enabled during the row non-selection section.

### Claim 14

A read-out method of an image sending device, comprising:
precharging a column line to a voltage level corresponding to a reset level of a pixel signal during a row non-selection section;
charging a floating diffusion node with a predetermined voltage in advance during the row non-selection section; and
reading out the pixel signal corresponding to a voltage level charged in the floating diffusion node through the column line during a row selection section subsequent to the row non-selection section.

### Claim 15 (depends on 14)

The method of claim 14, wherein the precharging of the column line includes:
charging a dummy floating diffusion node with the predetermined voltage; and
precharging the column line to the reset level of the pixel signal corresponding to a voltage level charged in the dummy floating diffusion node.

### Claim 16 (depends on 14)

The method of claim 14, wherein the charging of the floating diffusion node is carried out from a latter portion of the row non-selection section until an initial portion of the row selection section.