I wasn't sure where to put this but since it's hardware I'll throw it here. Can be moved if need be...
Taken from this site:
"Take a close look at the DS screen, pretty nice yeah?"
However, if PSP is beside the DS...
Now, we've turned the PSP's screen to the lowest brightness. The DS can now match up.
"And the following photos were taken of the hightest brightness of DS and PSP. The three photos were taken at normal light, dark, and side."
Using DS as PSP stand!