A gamma-type current-mode digital-to-analog converter for active-matrix organic light-emitting diode display drivers

다국어 초록 (Multilingual Abstract)

This paper describes the design of a gamma-type current-mode digital-to-analog converter (DAC) for active-matrix organiclight-emitting diode display (AMOLED) drivers. The proposed nonlinear DAC is composed of division-based bypassingDAC units for gamma correction. This multiple stack of DAC units dramatically reduces the chip size of the display driverwhile realizing more natural gamma correction. Moreover, it does not require an additional memory, such as a digital lookuptable block and a DAC with a higher resolution, which can achieve significant manufacturing cost savings. Consequently,the proposed multi-stacked gamma-type DAC provides high area efficiency, low cost, and more natural gamma correction.
The prototype 8-bit DAC is implemented in a TowerJazz 3.3 V CMOS process. The simulated gamma values of the doubleandtriple-stacked DAC units are varied from 1 to 2 and from 1 to 3, respectively. In addition, the Monte-Carlo simulationdemenstrates that the proposed design shows uniform gamma transfer curves regardless of the process variation.

참고문헌 (Reference)

1 J. -H. Baek, 41 : 2974-, 2006

2 J. -Y. Jeon, 1 : 174-, 2008

3 Y. -S. Son, 57 : 539-, 2010

4 Y. -J. Jeon, 25 : 1881-, 2010

5 H. T. Jensen, 45 : 13-, 1998

6 J. -H. Kim, 2 : 386-, 2006

7 Chao Su, 1 : 4-, 2006

8 I. -H. Jeong, 47 : 1913-, 2008

9 H. -S. Kim, 58 : 887-, 2011

10 T.-S. Kim, "US Patent No. 5,796,384"

11 J.J. Pastoriza, "Lincoln, Mass, US Patent No. 3,685,045"