Image sensing device and method for driving the same

Patent metadata

Field	Value
Publication number	US-9967495-B2
Application number	US-201615177765-A
Country	US
Kind code	B2
Filing date	Jun 9, 2016
Priority date	Jan 29, 2016
Publication date	May 8, 2018
Grant date	May 8, 2018

Abstract

An image sensing device includes a plurality of pixel groups, each pixel group including two or more neighboring pixels, and a controller suitable for controlling the pixel groups on a basis of a frame unit, wherein a readout order of the pixels in each of the pixel groups is different between present and next frames.

First claim

What is claimed is:

1. An image sensing device, comprising:
a plurality of pixel groups, each pixel group including two or more neighboring pixels; and
a controller suitable for controlling to read out pixel signals from all of the pixels included in the pixel groups on a basis of a frame unit, wherein a readout order of the pixels included in each of the pixel groups is different between present and next frames, and the pixels, which are read out, are identical between the present and next frames,
wherein two or more pixel signals are read out from the respective neighboring pixels included in each pixel group based on two or more transmission control signals,
wherein, in the present frame, the controller generates the two or more transmission control signals, corresponding to the respective neighboring pixels included in each pixel group, in a first order during a readout time of the present frame, and
wherein, in the next frame, the controller generates the two or more transmission control signals, corresponding to the same neighboring pixels, in a second order different from the first order during a readout time of the next frame.

2. The image sensing device of claim 1 , wherein a portion of the structure of the pixels in each pixel group is shared between the pixels in the pixel group.

3. The image sensing device of claim 2 , wherein each of the pixel groups includes:
two or more photo diodes;
two or more transmitters selectively transmitting a photocharge generated in the photo diodes to a floating diffusion node;
an initializer initializing the floating diffusion node;
a driver driving a pixel signal with a driving voltage based on a voltage loaded on the floating diffusion node; and
a selector transmitting the pixel signal to a column line.

4. The image sensing device of claim 3 , wherein the controller changes an enabling order of the two or more transmission control signals between the present and next frames.

5. The image sensing device of claim 1 , a initialization order of the pixels included in each of the pixel groups is different between present and next frames.

6. The image sensing device of claim 5 , wherein each pixel group is initialized based on the two or more transmission control signals during an initialization time of the present frame and an initialization time of the next frame,
wherein, in the present frame, the controller generates the two or more transmission control signals, corresponding to the respective neighboring pixels included in each pixel group, in the first order during the initialization time of the present frame, and
wherein, in the next frame, the controller generates the two or more transmission control signals, corresponding to the same neighboring pixels, in the second order during the initialization time of the next frame.

7. The image sensing device of claim 1 , wherein the controller changes a readout order of pixels arranged in a row direction among the pixels included in each of the pixel groups between the present and next frames.

8. The image sensing device of claim 1 , wherein the controller changes a readout order of pixels arranged in a column direction among the pixels included in each of the pixel groups between the present and next frames.

9. A method for driving an image sensing device including a plurality of pixel groups, each pixel group including two or more neighboring pixels, the method comprising:
generating two or more transmission control signals, corresponding to the respective neighboring pixels included in each pixel group, in a first order during a first readout time of a first frame time;
reading out two or more pixel signals from the respective neighboring pixels included in each pixel group during the first readout time of the first frame time based on the two or more transmission control signals; and
generating the two or more transmission control signals, corresponding to the same neighboring pixels, in a second order different from the first order during a second readout time of a second frame time; and
reading out the two or more pixel signals from the same neighboring pixels during the second readout time of the second frame time based on the two or more transmission control signals.

10. The method of claim 9 , further comprising:
generating the two or more transmission control signals, corresponding to the respective neighboring pixels included in each pixel group, in the first order during a first initialization time of the first frame time; and
initializing the neighboring pixels based on the two or more transmission control signals during the first initialization time.

11. The method of claim 10 , wherein the first initialization time is ahead of the first readout time.

12. The method of claim 9 , further comprising:
generating the two or more transmission control signals, corresponding to the same neighboring pixels, in the second order during the second initialization time of the second frame time; and
initializing the neighboring pixels based on the two or more transmission control signals during the second initialization time.

13. The method of claim 12 , wherein the second initialization time is ahead of the second readout time.

14. The method of claim 9 , wherein readout orders of pixels arranged in a row direction among the pixels included in each of the pixel groups are different from each other in the first and second orders.

15. The method of claim 9 , wherein readout orders of pixels arranged in a column direction among the pixels included in each of the pixel groups are different from each other in the first and second orders.

Assignees

• Sk Hynix Inc

Inventors

• Shin Min-Seok

Classifications

• H04N25/672 Primary

  between adjacent sensors or output registers for reading a single image · CPC title

• H04N25/778 Primary

  comprising amplifiers shared between a plurality of pixels, i.e. at least one part of the amplifier must be on the sensor array itself · CPC title

• H04N5/3653

  Electricity · mapped topic

• H04N5/37457 Primary

  Electricity · mapped topic