Spatial light modulator with charge-pump pixel cell
AssigneeTexas Instruments Incorporated
InventorPeter Richards
Life of this patent
Estimating the term…
Abstract
A voltage storage cell circuit includes an access transistor and a storage capacitor, wherein the source of said access transistor is connected to a bitline, the gate of said access transistor is connected to a wordline, and wherein the drain of said access transistor is connected to a first plate of said storage capacitor forming a storage node, and wherein the second plate of said storage capacitor is connected to a pump signal. This arrangement allows for a novel pixel circuit design with area requirements comparable to that of a 1T1C DRAM-like pixel cell, but with the advantage of an output voltage swing of the full range allowed by the breakdown voltage of the pass transistor. A spatial light modulator such as a micromirror array can comprise such a voltage storage cell.
Claims20
A method, comprising:
- for a memory cell comprising a transistor and a capacitor, wherein the drain of the transistor is connected to a first plate of the capacitor forming a voltage node,
- connecting the source to a bitline, the gate to a wordline, and a second plate of the capacitor to a pump line;
- and
- actuating the memory cell, comprising:
- driving a first voltage signal through the wordline;
- driving a second voltage signal through the wordline;
- and
- wherein the first and second signals are independent of each other.
Dependencies are inferred from the claim text.