Patent ID: 7199397

Claim:
An active matrix organic light emitting diode (AMOLED) display panel comprising: a thin film transistor (TFT) back panel; and an array of AMOLED pixels on the TFT back panel, at least one of the AMOLED pixels having a TFT circuit portion and an OLED circuit portion, at least one of the TFT circuit portions comprising at least one layer of polycrystalline silicon film formed by laser annealing an amorphous silicon film, and the array of AMOLED pixels are arranged to have the TFT circuit portions of the AMOLED pixels positioned in clustered regions, said clustered regions being defined by at least one pair of adjacent rows or columns of AMOLED pixels oriented toward one another so that between said pair of adjacent rows or columns of AMOLED pixels, the respective TFT circuit portions of two immediately adjacent ones of the AMOLED pixels are side by side, wherein each of the clustered regions constitutes substantially the area irradiated by a pulse of laser beam during the laser annealing of the amorphous silicon film allowing the laser beam to irradiate mostly the TFT circuit portions rather than the OLED circuit portions.