 Ultra-Small, High-Definition
Color OLED Display |
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Ultra small and high definition, the ECX331A
and the ECX332A are only 12.7 mm (0.5 type)
and 18.0 mm (0.7 type) diagonally in the XGA
and high-definition version, respectively.
(See table 1.) As a consumer EVF, it has
the industry's highest resolution while also
boasting the industry's smallest pixel size in
an OLED display. The smallest pixel size is
3.3 µm × 9.9 µm, which is approximately 1/20
the size of pixels in existing OLED displays.
An ultra-small high definition display was
achieved by forming a color filter (CF) on the
white organic EL layer. (See figure 1.) |
| Wide Color Gamut, High Contrast
and Fast Response |
|
Both the ECX331A and the ECX332A are
ultra small but generate 90% NTSC color
gamut with a maximum contrast ratio of
10,000:1 and a fast response of 0.01 ms or
less. (See table 2.) The wide color gamut,
high contrast and fast response provide
more natural color reproduction, smoother
gradation properties and superior moving
picture quality especially as EVFs in digital
single-lens cameras during shooting or for
greater audio-visual impact in viewing 3D
video using a head-mounted display. |
Built-in Drivers
All in One Package
|
|
This is an all-in-one package configuration
that provides all the required D/A converters,
timing controllers and temperature correction
for driving it. (See figure 2.) As a stand-alone
display, it is easy to handle and saves space
when placed on an electrical board. |
The Result of Sony's Unique
Technology
|
|
Decreasing subpixel size normally causes light to spill over onto adjacent pixels leading
to current leaks and lower image quality and
image properties. The ECX331A and the
ECX332A are the result of high precision
alignment using semiconductor assembly
technology of silicon drive substrate and CF
substrates configured using semiconductor
high voltage processing and high-definition
CF processing. This high precision alignment
technology combined with optimization in
light shielding configuration have minimized
deterioration in image quality and image
properties caused by alignment displacement
and repeated reflections of stray light. In
addition, electrode (anode) configuration
and material have been optimized to control
light-generating areas and leak current. The
composition of materials used in the emission
light (EL) layer and film structure have been
optimized to improve the tolerance to current
leaks that degrade image quality and image
properties. |
The Industry's First Ultra-Small
High-Definition Color OLED Displays
Vol.66