Display apparatus

Patent metadata

Field	Value
Publication number	US-11668993-B2
Application number	US-202217735805-A
Country	US
Kind code	B2
Filing date	May 3, 2022
Priority date	Jul 27, 2018
Publication date	Jun 6, 2023
Grant date	Jun 6, 2023

Abstract

A display apparatus can include a display panel; a first light path control layer including a plurality of lower slits, a first electrophoresis liquid having first light blocking particles injected into the plurality of lower slits, and a lower driving electrode pattern disposed to intersect a longitudinal direction of the plurality of lower slits; and a second light path control layer disposed on the first light path control layer, the second light path control layer including a plurality of upper slits, a second electrophoresis liquid having second light blocking particles injected into the plurality of upper slits, and an upper driving electrode pattern disposed to intersect a longitudinal direction of the plurality of upper slits.

First claim

What is claimed is:

1. A display apparatus comprising:
a display panel;
an upper light path control film disposed on the display panel; and
a lower light path control film disposed on the display panel,
wherein the upper light path control film includes:
a plurality of upper protruding patterns,
a plurality of upper slits,
a first electrophoresis liquid disposed in the plurality of upper slits,
a plurality of first light blocking particles in the first electrophoresis liquid, and
an upper driving electrode pattern disposed to intersect a longitudinal direction of the plurality of upper slits,

wherein the lower light path control film includes:
a plurality of lower protruding patterns,
a plurality of lower slits,
a second electrophoresis liquid disposed in the plurality of lower slits,
a plurality of second light blocking particles in the second electrophoresis liquid, and
a lower driving electrode pattern disposed to intersect a longitudinal direction of the plurality of lower slits,

wherein the upper driving electrode pattern is configured to concentrate the plurality of first light blocking particles on intersection regions of the plurality of upper slits and the upper driving electrode pattern or scatter the plurality of first light blocking particles throughout the plurality of upper slits based on a first driving voltage,
wherein the plurality of upper slits are surrounded by the plurality of upper protruding patterns and each of the plurality of upper slits has an upper concave portion disposed in the upper light path control film between adjacent upper protruding patterns among the plurality of upper protruding patterns,
wherein the upper concave portion in each of the plurality of upper slits has a tapered shape in which a width of an inner surface of the upper concave portion is smaller than a width of an opening surface of the upper concave portion,
wherein the opening surface of the upper concave portion is disposed closer to the display panel than the inner surface of the upper concave portion,
wherein the lower driving electrode pattern is configured to concentrate the plurality of second light blocking particles on intersection regions of the plurality of lower slits and the lower driving electrode pattern or scatter the plurality of second light blocking particles throughout the plurality of lower slits based on a second driving voltage,
wherein the plurality of lower slits are surrounded by the plurality of lower protruding patterns and each of the plurality of lower slits has an lower concave portion disposed in the lower light path control film between adjacent lower protruding patterns among the plurality of lower protruding patterns,
wherein the lower concave portion in each of the plurality of lower slits has a tapered shape in which a width of an inner surface of the lower concave portion is smaller than a width of an opening surface of the lower concave portion, and
wherein the opening surface of the lower concave portion is disposed farther away from the display panel than the inner surface of the inner concave portion.

2. The display apparatus of claim 1 , wherein the upper light path control film further includes:
a first base film disposed on the upper driving electrode pattern,
an adhesive layer adhering the plurality of upper protruding patterns to the upper driving electrode pattern,
a common electrode disposed on the plurality of upper protruding patterns, and
a second base film disposed on the common electrode, and
wherein each of the plurality of upper slits is disposed between adjacent upper protruding patterns among the plurality of upper protruding patterns.

3. The display apparatus of claim 1 , wherein the upper light path control film is configured to transmit light emitted from the display panel through the upper light path control film in a first mode and block a portion of the light emitted from the display panel in a second mode based on the first driving voltage.

4. The display apparatus of claim 1 , wherein the first electrophoresis liquid further includes:
the first light blocking particles having an electrophoretic characteristic and a light blocking characteristic, and
a transparent fluid configured to flow in the plurality of upper slits.

5. The display apparatus of claim 1 , wherein each of the plurality of upper slits has a line shape extending in a first direction, and
wherein the first driving electrode pattern extends in a second direction perpendicular to the first direction.

6. The display apparatus of claim 1 , wherein the plurality of upper slits have a lattice shape extending in a first direction and a second direction perpendicular to the first direction, and
wherein the upper driving electrode pattern extends in a diagonal direction relative to the first and second directions.

7. The display apparatus of claim 6 , wherein the upper driving electrode pattern extends in the diagonal direction and overlaps with vertices of the lattice shape.

8. The display apparatus of claim 1 , wherein the plurality of upper slits respectively overlap with the plurality of lower slits.

9. A display apparatus comprising:
a display panel including a thin film transistor layer including a plurality of thin film transistors and light emitting element layers respectively connected to the plurality of thin film transistors to form a plurality of light emitting areas;
an upper path control film disposed on the display panel; and
a lower light path control film disposed on the display panel,
wherein the upper light path control film includes:
a plurality of upper protruding patterns,
a plurality of upper slits,
first light blocking particles disposed in the plurality of upper slits, and
an upper driving electrode pattern intersecting a longitudinal direction of the plurality of upper slits,

wherein the lower light path control film includes:
a plurality of lower protruding patterns,
a plurality of lower slits,
second light blocking particles disposed in the plurality of lower slits, and
a lower driving electrode pattern intersecting a longitudinal direction of the plurality of lower slits,

wherein the first light blocking particles are configured to:
concentrate at regions within the plurality of upper slits where the plurality of upper slits and the upper driving electrode pattern cross each other at intersection regions, and
scatter throughout the plurality of upper slits,

wherein the second light blocking particles are configured to:
concentrate at regions within the plurality of lower slits where the plurality of lower slits and the lower driving electrode pattern cross each other at intersection regions, and

scatter throughout the plurality of lower slits,
wherein the plurality of upper slits are surrounded by the plurality of upper protruding patterns and each of the plurality of upper slits has an upper concave portion disposed in the upper light path control film between adjacent upper protruding patterns among the plurality of upper protruding patterns,
wherein the upper concave portion in each of the plurality of upper slits has a tapered shape in which a width of an inner surface of the upper concave portion is smaller than a width of an opening surface of the upper concave portion,
wherein the opening surface of the upper concave portion is disposed closer to the display panel than the inner surface of the upper concave portion,
wherein the plurality of lower slits are surrounded by the plurality of lower protruding patterns and each of the plurality of lower slits has a lower concave portion disposed in the lower light path control film between adjacent lower protruding patterns among the plurality of

Assignees

• Lg Display Co Ltd

Inventors

• Lee Sanghyun
• Park Minsoo

Classifications

• G02F1/1676

  Electrodes · CPC title

• H10K50/865

  comprising light absorbing layers, e.g. light-blocking layers · CPC title

• G02F1/1347 Primary

  Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells · CPC title

• G02F1/1368

  in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} · CPC title

• G09G3/3208

  organic, e.g. using organic light-emitting diodes [OLED] · CPC title