Patent ID: 8542172

Claim:
A method of operating an electro-optic display apparatus, the display apparatus including a display device having image regions and a display driving system, the driving system having a distributor for providing signals for driving the image regions, and a data input for selecting image regions connected to the input of the distributor, each image region having an active display state in which the image region is driven with an active voltage signal, wherein the active voltage signal includes a first signal level which sets an image region to the active display state and a second signal level different from said first signal level and which is applied for a shorter duration than said first signal level, the method comprising: applying said first signal level to one of said image regions in response to receiving data on said data input indicating that said image region is to be set to the active display state, applying the second signal level to said image region after said first signal level has been applied; and reapplying said first signal level before receipt of further data for said image region on said data input, wherein said display driving system includes an output latch for latching data received via said data input, and wherein said second signal level is applied to a given image region without varying data held in said output latch for said image region.