What is BSI censor for camara?

Day to day android being popular in world
New feature are add on everyday

There are one camera features called BSI censor are now comming in all new android device

About BSI censor 

A back-illuminated sensor, also known as backside
illumination ( BSI or BI) sensor, is a type of digital
image sensor that uses a novel arrangement of the
imaging elements to increase the amount of light
captured and thereby improve low-light performance.
The technique was used for some time in specialized
roles like low-light security cameras and astronomy
sensors, but was complex to build and required further
refinement to become widely used.

A back-illuminated sensor contains the same elements,

but orients the wiring behind the photocathode layer

by flipping the silicon wafer during manufacturing and

then thinning its reverse side so that light can strike

the photocathode layer without passing through the

wiring layer. 

BI sensors from

OmniVision Technologies have since been used in

consumer electronics from other manufactures as in

the HTC EVO 4G , [3] Android smart phone, and as a

major selling point for the camera in Apple’s iPhone 4 .

Advantage 

More effective in low light 

Can use on low MP camara 

Can control RGB     

Make pixel very sharp in low light….. 

Disadvantages 

Use more power 

BSI sensors are mechanically much weaker

due to the wafer thinning, a large BSI

sensor would be very prone 

Here is the different between images……. 

U can see different that bsi sensor make image brighter in low light