Display driving device and method of driving display system

A display driving device comprising:

• a first array composed of sampling latches configured to latch n-bit image data for each channel;
• a second array composed of holding latches configured to latch the image data latched in the sampling latches at a latch timing determined for each cell group;
• a signal generation circuit configured to generate a latch enable signal which causes the holding latches to perform a latch operation at the latch timing determined for each cell group;
• and
• a third array composed of level shifters configured to shift a voltage level of the image data output from the holding latches,
• wherein the cell group is composed of latch cells at the same position among latch cells constituting each holding latch;
• and
• wherein the signal generation circuit generates the latch enable signal for each cell group so that bits of the image data are sequentially latched in an order from a first cell group composed of first latch cells in which significant bits (MSBs) of the image data for each channel are latched in the holding latches to an nth cell group composed of nth latch cells in which least significant bits (LSBs) of the image data for each channel are latched in the holding latches.

A method of driving a display system, comprising:

• latching, by sampling latches, n-bit image data generated for each channel;
• generating a latch enable signal which causes holding latches to perform a latch operation at different latch timings determined for each latch group or each cell group;
• latching, by the holding latches, the image data latched in the sampling latches at the different latch timings according to the latch enable signal generated for each latch group or each cell group;
• and
• shifting a voltage level of the image data latched in the holding latches,
• wherein the latch group is composed of holding latches, and
• wherein, in the generating of the latch enable signal, the latch enable signal is generated for each cell group so that bits of the image data are sequentially latched in an order from a first cell group composed of first latch cells in which most significant bits (MSBs) of the image data for each channel are latched in the holding latches to an nth cell group composed of nth latch cells in which least significant bits (LSBs) of the image data for each channel are latched in the holding latches.