The LCD on the camcorder is some number of pixels and doesn't have a high contrast capability. It's scaled pricewise to provide a view, nothing more.
As to the PC, you may find a better view if you put the video on DVD and play it back there. Playback via a video editor may not optimize the preview so to provide editing speed. The editor software has to be able to run on low speed PCs so the rendering will be basic.
Why is it that when I watch a video from my digital camcorder in the tv its quality is better than in the cam itself and when I watch it in my pc (through the USB 2.0) its quality is poor and its resolution is small?
Can I do something about it?
(My camcorder is Sony DCR-TRV14E PAL)