An active matrix EL VGA display is reported with full grayscale using temporal voltage modulation of the phosphor. The exceptional brightness and dynamic range of the ZnS:Mn EL phosphor permits a new gray scale scheme. Digital gamma correction and an extended range of levels achieve 128 to 256 monotonic shades.
AMEL displays with 12~mx12km pixels in a 1280x 1024 array have been built and operated at 100MHz input data rates. The display accepts data at 100MHz on each of the 8 parallel inputs to support a total pixel data rate of over 800 megabits per second. These high data rates were achieved using a 1.2~m effective channel length body-tied crystalline silicon TFTs fabricated on SOI. This is the highest data rate reported for any flat panel display.
An Active Matrix Electroluminescent (AMEL) miniature display is reported with over l000fLluminance. This technology is demonstrated on a 0.7-inch diagonal 640x480 display. This achievement was made possible primarily through improvements in the AMEL design and process technology. Additionally, by addressing the display with only one bit of grayscale data, more ofthe frame time is available for applying light generating voltage pulses to the phosphor. This paper discusses the key characteristics of this display, including luminance, contrast, and power consumption. Details of luminance and grayscale tradeoffs are explained. System drive electronics used to interface this display to common video sources are also described.
Using a 12x12 tm pixel cell and 1.0 tm design rules, a 0.7-inch diagonal 1280x1024 active matrix electroluminescent (AMEL) display has been designed and demonstrated using a silicon-on-insulator (SOl) based CMOS technology. The display accepts data at 100 MHz via eight data inputs and provides five bits of gray scale. A total of 24 connections are used for all display functions. Architecture, theory of operation, and detailed specifications for this new 2000 line-per-inch display will be discussed. The display is the same size as Planar's previously developed AMEL 640x480 arrays, thus providing over four times the number of pixels in the same footprint as the prior design. The display provides workstation resolution in an extremely compact format and offers the same environmental robustness and optical performance as previously demonstrated in 1000 line-per-inch AMEL displays.
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