Abstract:

The low conductivity of transparent ITO column electrodes severely limits the size of an ACTFEL display. Simplified equivalent row and column drive circuits are proposed for a fast investigation of the limitation. It reveals that the column drive circuit plays a dominant role in the time delay. The worst delay case occurs when just one pixel in the driven row is turned on, instead of one half of the pixels when the total capacitance reaches its maximum value. This implies the importance of the contribution from column electrode resistance. Furthermore, a feasible means, metal sidewall structure, is presented for alleviating this restriction.

Key words: ITO, conduct ivity, size, sidew all st ructure, m icro-elect rop lat ing