Patent ID: 7961167

Claim:
A display device comprising: a display area having pixels arranged in a matrix; a vertical drive circuit configure to select pixels in the display area in unit of rows; a first horizontal drive circuit: (a) receiving as input first and second digital image data corresponding only to different first and second colors respectively; (b) converting the digital image data to analog image signals; and (c) supplying the same to a data line to which pixels of the row selected by the vertical drive circuit are connected; a second horizontal drive circuit: (a) receiving as input a third digital image data corresponding only to a third color different from the first and second colors; (b) converting the digital image data to an analog image signal; and (c) supplying the same to a data line to which pixels of the row selected by the vertical drive circuit are connected; a first reference voltage generation circuit operably connected to the first horizontal drive circuit; and a second reference voltage generation circuit operably connected to the second horizontal drive circuit, said second reference voltage generation circuit being separate from the first reference voltage generation circuit; the first horizontal drive circuit including: (a) a first sampling latch configured to sequentially sample and latch the first digital image data using a first sampling pulse; (b) a second sampling latch cascade connected to the first sampling latch, the second sampling latch having an output, the second sampling latch being configured to sequentially sample and latch the second digital image data using said first sampling pulse; (c) an output circuit including a third latch and a fourth latch cascade connected to said output of said second sampling latch, the output circuit being configured to select and output the first and second digital image data latched in the first and second sampling latches in a time division manner in a predetermined period, wherein the output circuit: (i) transfers the second digital image data of the second sampling latch through the third latch to the fourth latch; (ii) after transferring the second digital image data to the fourth latch, transfers the first digital image data of the first sampling latch through the second sampling latch to the third latch; and (iii) after transferring the first digital image data to the third latch, transfers the second digital image data from the fourth latch to a digital/analog converter; (d) the digital/analog converter configured to convert the first and second digital image data output from the output circuit to analog image signals; and (e) a line selector configured to: (i)select the first and second digital image data converted to analog data by the digital/analog converter in a time division manner in the predetermined period, in an alternating fashion, including only selecting the first digital image data corresponding only to the first color and the second digital image data corresponding only to the second color; and (ii) output the same to a data line.