Multi-primary color display device
A multi-primary color display device is capable of handling an increased number of primary colors for color image display with a reduced number of external parts, with reduced increase in the amount of drive circuit and reduced increase in operating speed. An active matrix liquid crystal panel includes a display section constituted by pixel formation portions, each made of four sub pixel-formation portions which handle four primary colors. These four sub pixel-formation portions are arranged in a 2×2 matrix pattern. With such a pixel configuration, a source driver drives as many as M source lines, which is two times the number M of pixels arranged in a horizontal direction. A gate driver is formed on the liquid crystal panel integrally with pixel circuit in the display section, and drives as many as N gate lines, which is two times the number N of the pixels arranged in a vertical direction.
1. A multi-primary color display device for displaying color images based on four or a greater predetermined number of primary colors, comprising:
a display panel including a plurality of pixel formation portions arranged in a matrix pattern, a plurality of data signal lines and a plurality of scanning signal lines crossing the data signal lines;
a data signal line drive circuit for applying a plurality of data signals which represent an image to be displayed, to the data signal lines; and
a scanning signal line drive circuit for selectively activating the scanning signal lines; wherein
the scanning signal line drive circuit is formed on the display panel;
each pixel formation portion includes a predetermined number of sub pixel-formation portions for forming subpixels of said predetermined number of primary colors;
the predetermined number of sub pixel-formation portions included in each pixel formation portion are arranged in a matrix pattern consisting of a plurality of rows extending in a direction in which the scanning signal lines extend and a plurality of columns extending in a direction in which the data signal lines extend;
each of the sub pixel-formation portions included in the pixel formation portions corresponds to one of intersections made by the data signal lines and the scanning signal lines, and is connected to the data signal line and the scanning signal line which pass through said intersection;
each sub pixel-formation portion includes a predetermined capacitance, captures and supplies a voltage in the data signal line which passes through the corresponding intersection to the predetermined capacitance when the corresponding scanning signal line is activated; and
the scanning signal line drive circuit sequentially activates the scanning signal lines for a predetermined period so that each sub pixel-formation portion captures the voltage in the data signal line as a subpixel value of the image to be displayed, while also activating each scanning signal line for a predetermined period preceding said period of sequential activation by as many periods as a vertical color cyclic number, the vertical color cyclic number being defined as a quantity of the sub pixel-formation portions within each pixel formation portion in a direction in which the data signal lines extend.
2. The multi-primary color display device according to claim 1 ,
wherein the vertical color cyclic number is provided by an even number, and
wherein the data signal line drive circuit reverses polarity of the data signals once per a number of horizontal periods given by a multiplication of the horizontal period by a quotient which is obtained by dividing the vertical color cyclic number by an even aliquot thereof.
3. The multi-primary color display device according to claim 2 ,
wherein the color images are based on four primary colors,
wherein the four sub pixel-formation portion included in each pixel formation portion are arranged in a matrix pattern consisting of two rows extending in a direction in which the scanning signal lines extend and two columns extending in a direction in which the data signal lines extend, and
wherein the data signal line drive circuit reverses polarity of the data signals once per each horizontal period.