초록 ▼

A novel electronic apparatus for driving passive x-y addressed liquid crystal displays (LCDs) and having improved display performance is disclosed and claimed. This apparatus is comprised of row driving integrated circuits capable of driving row lines of the LCD with a pattern of voltages correspond

A novel electronic apparatus for driving passive x-y addressed liquid crystal displays (LCDs) and having improved display performance is disclosed and claimed. This apparatus is comprised of row driving integrated circuits capable of driving row lines of the LCD with a pattern of voltages corresponding to the basis vectors of a linear transform matrix. Column driver circuits containing analog CMOS pixel memory store video information and compute the linear transform of the pixel matrix. High voltage amplifier circuits to drive the column lines with voltages corresponding to the linear transform of the pixel matrix columns can be monolithically integrated with the transform computation circuitry. The LCD screen inherently performs the inverse transform and displays the desired pixel matrix. The speed and contrast of the LCD are improved, allowing the display of video rate images on passive LCD screens.

대표청구항 ▼

[ I claim:] [1.] An apparatus for addressing a liquid crystal display with video pixel information, comprising:(a) analog memory for storing a first and a second value, wherein the first value is representative of the video pixel information and the second value is representative of a square root of

[ I claim:] [1.] An apparatus for addressing a liquid crystal display with video pixel information, comprising:(a) analog memory for storing a first and a second value, wherein the first value is representative of the video pixel information and the second value is representative of a square root of a constant minus a square of the video pixel information;(b) analog computation means for computing a linear transform of the first and second values; and(c) at least one amplifier for driving at least one column electrode of the liquid crystal display with a first voltage representative of the linear transform of the first value minus the linear transform of the second value and a second voltage representative of the linear transform of the first value plus the linear transform of the second value.