US 2019/0317346 A1 · THIN TWO-DIMENSIONAL DIMMING BACKLIGHT WITH LOW ZONE VISIBILITY

Abstract

A passive matrix display has corrugated electrode edges to reduce zone visibility within a display system. A passive matrix display includes a first substrate and a second substrate; a liquid crystal layer positioned between the first and second substrates; a patterned electrode layer formed on the first substrate comprising a plurality of individual electrodes, wherein adjacent individual electrodes are separated by an electrode gap; and a second electrode layer formed on the second substrate. At least a portion of opposing edges of adjacent individual electrodes at the electrode gap include corrugations. The elements of the corrugations may be any suitable shapes and/or sizes as may be suitable for any particular application. The corrugations may be uniformly shaped or varying, symmetric or asymmetric about a horizontal axis, and/or may have a regular or irregular pattern. Another aspect is a display system including the enhanced passive matrix display that reduces zone visibility.

Claims20

Dependent claims

A passive matrix display comprising:

a first substrate and a second substrate;
a liquid crystal layer positioned between the first substrate and the second substrate;
a patterned electrode layer formed on the first substrate comprising a plurality of individual electrodes, wherein adjacent individual electrodes are separated by an electrode gap;
and
a second electrode layer formed on the second substrate;
wherein at least a portion of opposing edges of adjacent individual electrodes at the electrode gap include corrugations;
and
wherein the corrugations are included on all edges of at least a portion of the plurality of the individual electrodes, and corrugations of a first individual electrode tesselate with corrugations of a second adjacent individual electrode along the electrode gap.

5 more elements

A display system comprising:

a backlight,
a main liquid crystal display;
and
a passive matrix display located between the backlight and the main liquid crystal display, wherein the backlight is on a non-viewing side and the main liquid crystal display is on a viewing side relative to the passive matrix display;
the passive matrix display comprising:
a first substrate and a second substrate;
a liquid crystal layer positioned between the first substrate and the second substrate;
a patterned electrode layer formed on the first substrate comprising a plurality of individual electrodes, wherein adjacent individual electrodes are separated by an electrode gap;
and
a second electrode layer formed on the second substrate;
wherein at least a portion of opposing edges of adjacent individual electrodes at the electrode gap include corrugations;
and
wherein the corrugations are included on all edges of at least a portion of the plurality of the individual electrodes, and corrugations of a first individual electrode tesselate with corrugations of a second adjacent individual electrode along the electrode gap.

10 more elements

Dependencies are inferred from the claim text.

Thin two-dimensional dimming backlight with low zone visibility

Life of this patent

Thin two-dimensional dimming backlight with low zone visibility

Life of this patent

Abstract

Claims20