DHGR Color Question

["Bryan Parkoff" <bryan.nospam.parkoff@nospam.com>]

    DHGR's 7 pixels are in 7 bits that contains 8 colors in the even and
another 8 colors in the odd that are total 16 colors.  Who invented double
high resolution on all Apple II Family?  Who overcame the limitation of 16
colors in 7 pixels per byte that 6502 can only handle 16K space.  One 8K in
even bank and another 8K in odd bank.  It is true that it does not look
neat, but it should be 16 colors per pixel in 7 pixels.  Is it what they are
trying to save memory space so they overcame the limitation?
    Think about Apple IIgs and VGA -- they look much better than double high
resolution because each pixel can have 16 colors per byte however double
high resolution can only have 8 colors or less per pixel in 7 pixels?
    Can you please explain how clever they did?

-- 
Bryan Parkoff