Epson Research and Development
Page 25
Vancouver Design Center
8 bpp gray shade
The 8 bpp gray shade mode uses the green component of the first 16 LUT entries. The green
portion of the LUT provides 16 possible intensities. There is no increase in gray shades
when selecting 8 bpp mode over 4 bpp mode; however, Swivelview and the BitBLT engine
can be used in 8 bpp mode but not in 4 bpp mode.
15 bpp gray shade
The Look-Up Table is bypassed at this color depth, hence programming the LUT is not
required.
As with 8 bpp there are limitations to the colors which can be displayed. In this mode the
five bits of green are used to set the absolute intensity of the image. This results in 32 gray
shades when dithering is enabled and 16 gray shades when dithering is disabled.
16 bpp gray shade
The Look-Up Table is bypassed at this color depth, hence programming the LUT is not
required.
As with 8 bpp there are limitations to the colors which can be displayed. In this mode the
six bits of green are used to set the absolute intensity of the image. This results in 64 gray
shades when dithering is enabled and 16 gray shades when dithering is disabled.
Programming Notes and Examples
Issue Date: 01/02/06
S1D13506
X25B-G-003-03
EPSON [ EPSON COMPANY ]
