Matrix display
AssigneeKoninklijke Philips Electronics N.V.
InventorJohn M. Shannon
Life of this patent
Estimating the term…
Abstract
A matrix display has pixels 2 each including a programmable memory element 30 arranged in parallel across capacitance 28. The voltage on the capacitance controls a display element 25. The arrangement can be run in a normal mode, with all of the memory elements 30 in a high resistance state so that the matrix display can be driven dynamically. Alternatively, in a static (low power) mode of operation, the memory elements 30 are programmed with a static image which may be displayed without driving the data lines 6.
Claims11
A matrix display, comprising:
- a plurality of data lines;
- a plurality of select lines;
- and
- a plurality of pixel elements including:
- a select transistor connected to a data line, the select transistor having a control terminal connected to a select line,
- a capacitance for storing charge supplied by the said data line when the pixel element is selected by the select line, the charge providing a voltage across the capacitance, and
- a display component connected to the capacitance for displaying a pixel image element in accordance with the voltage across the capacitance;
- characterised in that each pixel includes a programmable element across the capacitance switchable between a low resistance state in which it shorts the capacitance and a high resistance state.
A method of operation of a matrix display including a plurality of data lines, a plurality of row select lines and a plurality of pixel elements, each pixel element including a select transistor, a capacitance, a display component connected to the capacitance and a programmable element across the capacitance switchable between a low resistance state in which it shorts the capacitance and a high resistance state,
- the method including operating the matrix display in a static mode by:
- programming the programmable elements of a set of the pixels into a low resistance state;
- and
- applying predetermined voltages to all the data lines and select lines to display an image corresponding to the set of pixels programmed into the low resistance state.
Dependencies are inferred from the claim text.