Improved gray-scale monochrome and color AMEL displays using analog pixels

摘要

Active-matrix electroluminescent(AMEL)microdisplays have been known for their numerous beneficial characteristics such as low weight, compactness, high brightness, and high con- trast ratio. Beside these desirable characteristics, some of their drawbacks include difficulty in obtain- ing a high number of gray-scale levels or a large number of colors, and interface-electronics complexity. To address these drawbacks, AMEL displays using an analog addressing architecture have been developed. Utilizing this new driving scheme, 256 monochrome levels or 16 million colors are obtainable. Gray shade is proportional to an analog voltage stored on the hold node of each pixel.