Sony began the CMOS imager revolution with the HX-1 and TX-1 models in 2009, then they followed with the WX-1 late in 2009. The HX5 is the 4th cmos imager equipped camera.
The CMOS imager technology continues to evolve. The HX1 and TX1 used a conventional CMOS imager. The WX1 was the first backlighted CMOS imager. Now the HX5 is a further evolution. So, as you can easily see the CMOS imager used on the HX5 has a heritage.