Method and device for driving a display device with line-wise dynamic addressing

摘要

The EMI spectrum of a display device is to comply with respective norms. Therefore, the clock for loading data into data drivers of a display panel is designed to be variable. Consequently, the electromagnetic radiation produced by the loading clock is broadened thereby reducing the peak amplitude. Thus, the limitations of radiation norms can be complied with.

主权项

1. A method for driving a display device having a plurality of cells or pixels comprising the steps of:
loading addressing data into data driving means at a loading frequency, in order to activate cells or pixels before lighting; applying an addressing signal to at least one of said plurality of cells or pixels for an addressing time period of which the length corresponds to an addressing frequency on the basis of said addressing data; varying said addressing frequency for applying the addressing signal to cells or pixels with the vertical position of the line on the screen of said display device depending on the panel technology so that the pixels that are addressed employing a different clock frequency belong to different scan lines of the display device and the clock frequency is dependent on the vertical position of the line on the screen of the display device or said addressing frequency being variable with the presence or absence of a priming signal; and adapting continuously said loading frequency of the addressing data into data driving means to said addressing frequency for applying the addressing signal to cells or pixels such that an energy emitted by the data driving means is maintained at a nominal level while being spread over a frequency range depending on said continuously adapting said loading frequency.