Browse Prior Art Database

24 Bit Color Display with Red Green Blue (RGB) 555 Format

IP.com Disclosure Number: IPCOM000117658D
Original Publication Date: 1996-Apr-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 4 page(s) / 75K

Publishing Venue

IBM

Related People

Fujita, N: AUTHOR [+2]

Abstract

Disclosed is a method for displaying 24 bit color using RGB555 pixel data format by assigning a bit in video data as the indicator.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 90% of the total text.

24 Bit Color Display with Red Green Blue (RGB) 555 Format

      Disclosed is a method for displaying 24 bit color using RGB555
pixel data format by assigning a bit in video data as the indicator.

      The structure of 16 bit video data is defined in Fig. 1.

      If the indicator is "0", the data is normal type.  These RGB
data go into Digital to Analog Converter (DAC) after they are shifted
to left 3 bit in order to match data format to DAC input which is
each RGB 8 bit.

      Fig. 2 shows an example of 16 bit RGB data.  These data are
transformed as shown in Fig. 3 before going into the DAC.

      DAC transfers these digital data to analog RGB signal.  These
data are also stored into a register which is provided before going
into DAC.

      If the indicator is "01", the data is differential type.  These
data are added to the data stored in the register, then goes into DAC
(Fig. 7).

      For example, the previous data stored in the register are as
shown in Fig. 4.

      And then the next pixel data is differential type as shown in
Fig. 5.

      These two corresponding blocks of data are added respectively,
as shown in Fig. 6.

      After the calculation, these added data go into DAC.  In this
case, these data are stored in to the register before going into DAC.

      This method is effective for displaying natural picture.  It is
because natural picture requires capability to describe many colors
as well as ther...