The only thing you can do is look at getting a external screen with higher output or protect your display from sunlight with a hood.
I use a Mimo display with fairly high output and while it is hookup in my car under a roof, it does see some direct sunlight and works well for laptimer view.
Do you have permanent power to the pocketpc while driving? That will sometimes turn up the backlight. Check if it is set to max.
It works fine on my Dell Axim51v PDA even on bright days.
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I use a Mimo display with fairly high output and while it is hookup in my car under a roof, it does see some direct sunlight and works well for laptimer view.
It works fine on my Dell Axim51v PDA even on bright days.