US 2008/0259019 A1 · Asynchronous display driving scheme and display

Abstract

A novel method for driving a display includes the steps of defining a modulation period during which a particular intensity value is asserted on a pixel of the display, dividing the modulation period into a plurality of coequal time intervals, receiving a data word, which includes a plurality of equally-weighted bits and is indicative of an intensity value to be displayed by the pixel, updating a signal asserted on the pixel during each of a plurality of consecutive time intervals during a first portion of the modulation period, and updating the signal asserted on the pixel every mth time interval during a second portion of the modulation period, where m is equal to the weight of each of the equally-weighted bits. The data word can either be composed of two groups of equally-weighed bits, or a combination of binary bits and equally-weighted. The invention also includes a novel display driver for executing the driving methods.

Claims60

Dependent claims

A method for driving a display device, said method comprising:

defining a modulation period during which a particular intensity value is to be asserted on a pixel of said display device;
dividing said modulation period into a plurality of coequal time intervals;
receiving a data word indicative of an intensity value to be displayed by said pixel, said data word including a plurality of equally-weighted bits;
updating a signal asserted on said pixel during each of a plurality of consecutive ones of said time intervals during a first portion of said modulation period;
and
updating the signal asserted on said pixel every mth one of said time intervals during a second portion of said modulation period;
and wherein
m is an integer equal to the weight of each of said plurality of equally-weighted bits.

5 more elements

A display driver comprising:

a timer operative to generate a series of time values each associated with a respective one of a plurality of coequal time intervals of a modulation period;
a data input terminal for receiving a data word including a plurality of equally-weighted bits;
an output terminal selectively coupled to a pixel in a row of said display;
and
control logic, responsive to said time values and said data word, and operative to
update a signal asserted on said pixel during each of a plurality of consecutive ones of said time intervals during a first portion of said modulation period;
and
update said signal asserted on said pixel every mth one of said time intervals during a second portion of said modulation period;
and wherein
m is an integer equal to the weight of each of said plurality of equally-weighted bits.

7 more elements

Dependencies are inferred from the claim text.

Asynchronous display driving scheme and display

Life of this patent

Asynchronous display driving scheme and display

Life of this patent

Abstract

Claims60