Method of reducing errors in displays using double-line sub-field addressing
First Claim
1. A method of determining new luminance value data based on original luminance value data to be displayed on a matrix display device, said new luminance value data being coded in sub-fields, said sub-fields consisting of a group of most significant sub-fields, and a group of least significant sub-fields, said device comprising a set of lines, said lines being grouped in sets of neighbouring or adjacent lines, wherein a common value for the least significant sub-fields is addressed simultaneously to the set of lines, characterized in that a new common value for the least significant sub-fields of said set of neighbouring or adjacent lines is computed and addressed simultaneously to said set of lines, and new values for the most significant sub-fields of each line of said set of neighbouring or adjacent lines are computed and addressed to each line of said set.
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Abstract
Method of calculating new luminance value data based on original luminance value data to be displayed on a matrix display device, where luminance value data are coded in sub-fields, and double-line addressing for the least significant sub-fields is used for reducing the addressing time. A reduction of the difference between the new data and the original data is obtained by computing a new common value for the least significant sub-fields of a set of neighboring or adjacent lines, and new values for the most significant sub-fields of each line of said set of adjacent lines. The method comprises embodiments which are applicable to both binary and non-binary sub-fields.
25 Citations
16 Claims
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1. A method of determining new luminance value data based on original luminance value data to be displayed on a matrix display device, said new luminance value data being coded in sub-fields, said sub-fields consisting of a group of most significant sub-fields, and a group of least significant sub-fields, said device comprising a set of lines, said lines being grouped in sets of neighbouring or adjacent lines, wherein a common value for the least significant sub-fields is addressed simultaneously to the set of lines, characterized in that
a new common value for the least significant sub-fields of said set of neighbouring or adjacent lines is computed and addressed simultaneously to said set of lines, and new values for the most significant sub-fields of each line of said set of neighbouring or adjacent lines are computed and addressed to each line of said set.
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15. A matrix display device (1) comprising a receiving circuit (2) for receiving luminance data comprising original luminance value data of pixels, the matrix display device (1) further comprising a display panel (5) comprising a set of lines r1 . . . rM, and a driver circuit (4) for supplying line luminance value data to said lines, said lines being grouped in sets of neighbouring or adjacent lines, wherein a common value for the least significant sub-fields is addressed simultaneously to a set of lines
characterized in that the matrix display device (1) comprises a computing unit (3) for computing new line luminance values C of pixels on the basis of the original line luminance values, a new common value for the least significant sub-fields of said set of neighbouring or adjacent lines being computed and addressed simultaneously to said set of lines, and new values for the most significant sub-fields of each line of said set of neighbouring or adjacent lines being computed and addressed to each line of said set.
Specification