Display panel driving circuit capable of minimizing circuit area by changing internal memory scheme in display panel and method using the same

A display driving circuit comprising:

• a source driver including a plurality of unit source drivers connected in parallel, the source driver connected to first and second source lines to control the first and second source lines;
• memory configured to store image data of the first and second source lines and arranged with channels having the same color neighbor each other;
• and
• a display panel,
• wherein the plurality of unit source drivers comprises:
• a data comparator receiving the image data of the first and second source lines from the memory, determining whether the image data of the first and second source lines are identical, outputting a first switching signal if the image data of the first and second source lines are determined to be different, and outputting a second switching signal if the image data of the first and second source lines are determined to be identical;
• a first controller controlling the first source line;
• and
• a second controller controlling the second source line,
• wherein one of the first and second controllers is activated and the other of the first and second controllers is deactivated in response to the second switching signal, and an output signal of the activated controller is transferred to the first and second source lines.

A display driving circuit comprising:

• a source driver including a plurality of unit source drivers connected in parallel, the source driver connected to a plurality of source lines to control the source lines;
• memory configured to store image data of the plurality of source lines and arranged with channels having the same color neighbor each other;
• and
• a display panel,
• wherein the plurality of unit source drivers comprises:
• a data comparator receiving the image data of the plurality of source lines from the memory, determining whether the image data of the plurality of source lines are identical, outputting a first switching signal if the image data of the plurality of source lines are determined to be different, and outputting a second switching signal if the image data of the plurality of source lines are determined to be identical;
• and
• a plurality of controllers amplifying the output image data of the data comparator and controlling the output image data to each of the source lines,
• wherein one of the plurality of controllers is activated and other controllers are deactivated in response to the second switching signal, and an output signal of the activated controller is transferred to the plurality of source lines.

A display driving circuit comprising:

• a source driver including a plurality of unit source drivers connected in parallel, the source driver connected to a plurality of source lines to control the source lines;
• memory;
• and
• a display panel,
• wherein the plurality of unit source drivers comprises:
• a red (R) channel multiplexer receiving R channel data among image data of the source lines stored in the memory and sequentially outputting the image data of the source lines;
• a green (G) channel multiplex receiving G channel data among the image data of the source lines stored in the memory and sequentially outputting the image data of the source lines;
• a blue (B) channel multiplexer receiving B channel data among the image data of the source lines stored in the memory and sequentially outputting the image data of the source lines;
• a latch unit receiving and latching outputs of the R, G, and B channel multiplexers;
• an R channel controller that sequentially receives the R channel data of the source lines from the latch unit and is connected to R channel pixels of the source lines;
• a G channel controller sequentially receiving the G channel data among the output image data of the latch unit by each source line and connected to G channel pixels of each source line;
• and
• a B channel controller sequentially receiving the G channel data among the output image data of the latch unit by each source line and connected to B channel pixels of each source line,
• wherein the R, G, and B channel controllers sequentially output the sequentially input image data of the source lines to each of an R channel pixel line, a G channel pixel line, and a B channel pixel line of the source lines.

A method of driving a display circuit, the method comprising:

• rearranging and storing image data input externally according to a predetermined number of source lines so that channel data having the same color neighbor each other;
• reading and latching the rearranged image data;
• determining whether the image data of the predetermined number of source lines are identical;
• and
• if the image data of the predetermined number of source lines are different, independently transferring the image data to corresponding source lines, and if the image data of the predetermined number of source lines are identical, activating one buffer connected to one of the source lines and deactivating buffers connected to remaining source lines, and transferring the output image data of the activated buffer to a source line connected to the deactivated buffer.