Patent ID: 9361846
Filing Date: 2016-06-07
CPC Classification: G09G

Claim Text:
1. A charge sharing method for a display driver that uses Z-inversion, the method comprising: receiving a first row of data for a plurality of source lines; receiving a second row of data for the plurality of source lines; for each source line of the plurality of source lines, determining whether a change amount between data for that source line from the first row of data and data for that source line from the second row of data is above a threshold; first controlling whether to perform charge sharing among a first group of source lines of the plurality of source lines based on the determinations for that first group of source lines; second controlling whether to perform charge sharing among a second group of source lines of the plurality of source lines based on the determinations for that second group of source lines, wherein the first controlling includes controlling connection between a first charge sharing line and each of the first group of source lines, wherein the second controlling includes controlling connection between a second charge sharing line and each of the second group of source lines, and wherein the connection between the first charge sharing line and at least one source line of the first group of source lines is independent from the connection between the second charge sharing line and at least one source line of the second group of source lines; and based on the determinations for the first group of source lines; counting a first number of determinations for which a charge associated with the data for a respective source line increases more than a first threshold amount; counting a second number of determinations for which a charge associated with the data for a respective source line decreases more than a second threshold amount; and controlling whether to perform the charge sharing for the first group of source lines based on the first number of determinations and the second number of determinations.