Patent ID: 7549597

Claim:
A graphical indicator provided on the surface of an object to represent index information, the graphical indicator comprising: a content part spread with a plurality of micro-units, the content part being divided into a plurality of first state zones and each first state zone being spread with one micro-unit, wherein each first state zone is equally divided into multiple hypothetical sections and the micro-unit is placed in any of the hypothetical sections to form different candidate states; and a header part spread with a plurality of micro-units and divided into a plurality of second state zones, wherein each second state zone is spread with one micro-unit not used to carry information and the position of each micro-unit serves as the header information used to recognize the graphical indicator; wherein the first state zones and the second state zones are two complementary parts of an array of N rows (N≧2) and M columns (M≧2), the number of the micro-units is N×M, and the second state zones of the header part are arranged into an outermost row and an outermost column of the array to define the distribution area of the content part; and wherein at least one micro-unit in the header part is placed in a position within one state zone different to the position of the rest of the micro-units in the header part.