The LE-DJ021MH has a CCD sensor type which is better than the MOS sensor type found on most digital cameras of this age and type. CCD sensors produce high quality, low-noise images but consume a lot more power than CMOS sensors. CCD is the most common image sensor type used in digital cameras.
A CCD sensor type is actually the best sensor type amongst all comparable spec cameras that are a similar age to the LE-DJ021MH.
A MOS sensor type is the worst sensor type amongst similar types of camera.