Image Sensor for Mobile
A high sensitivity sensor and short exposure time are effective ways to prevent camera shake and stabilize images. Backside illuminated (BI) sensors offer higher sensitivity than front side illuminated (FI) sensors, as does a larger optical size at the same pixel structure.
Sony CMOS image sensors are equipped with a standard 2x2 averaging mode that is equivalent to a pixel size four times larger, which, while reducing resolution (image size) to 1/4, helps to further prevent camera shake.
The increasing pixel count and speed of CMOS image sensors has made high speed video shooting a reality.
When shooting fast moving objects, both frame rate and exposure time need to be reduced to avoid blurred motion. Sony has enhanced its high-sensitivity BI technology with 4 pixel calculation processing to double SNR, bolstering its lineup with products capable of shooting at quadruple speed. Sony's 8 megapixel products enable easy shooting of high speed movies at 180 fps for 720p HD images, or 240 fps for 960 x 540 (QuaterHD) images.
Applicable products: IMX219PQ
Taking still pictures with great clarity in backlit condition requires the use of camera flash or an HDR function, which synthesizes multiple images of differing exposures. However, these methods are not suitable for video. In particular, camera angle and exposure conditions are difficult to optimize when shooting sport video and backlighting may cause underexposure or overexposure. With BME HDR and SME HDR features that configure two exposure conditions, however, Sony products offer rich image processing through stacked sensor technology, performing appropriate signal processing of captured images within the sensor to enable HDR video shooting.
Applicable products: IMX135
Competition for thinner products is heating up as smartphones take on more stylish designs. Thinner products call for lower-height camera modules, for which high CRA lenses are used.
This, in turn, requires on-chip lens correction, as well as improved performance in reducing color cross talk from adjacent pixels due to angled incident light. Needless to say, reducing optical size without reducing pixel count also requires a minute pixel sensor with a high SNR.
IR illumination is often used to take pictures without altering the brightness of a particular scene. The Sony lineup features sensors that are able to take pictures in IR light as well as in normal visible light. This lets a single camera take pictures in dark areas under IR illumination, with the same gesture recognition capabilities as in bright areas.