Pulse Oximeter

OLED Display Applications – Examples

Pulse Oximeter

The demand for pulse oximeters has increased with the spread of COVID‑19.
What kind of device is it, and what are the advantages of using OLED?
We will explain in simple terms.

What is a pulse oximeter?

It is a medical device that measures blood oxygen
saturation without taking blood samples, and checks
how much oxygen in the lungs is taken into the blood
and transported throughout the body.

It is widely used in the daily health management of
people with chronic diseases and in medical and
nursing cares.

OLED has a wide viewing angle

OLED has a wide viewing angle

A variety of displays are currently used in pulse
oximeters. Among them, OLED displays are
recommended for displaying readings in an
easy‑to‑read manner. The OLED display has the
advantage that the values are clearly visible even
when the display is viewed from an angle.

The values are difficult to read and may be misrecognized.

For clear display of measured values

If you look at a traditional display, you may see
segments that are not lit. This can make it difficult
to read the measured value.

On the other hand, with OLED, only the characters
to be displayed are illuminated, so the segments
that are not lit are not visible, and only the measured
values are clearly visible.

Tohoku Pioneer's OLED in a Pulse Oximeter

Traditional Display

OLED Display

* Image of Tohoku Pioneer OLED


"When I look at the readings from an
angle, the numbers are blurry and
difficult to read. You have to look at
them from the front..."


OLED has the advantage that the display is
easy to see even when viewed from an
angle. Measurements are clearly visible
even when not in front.


"It's hard to see the numbers because
you can faintly see the lines not to
be shown..."


The non‑displayed area is completely
black and does not glow. Numbers are
clearly readable.

Specification details

We offer a standard product that can be used with pulse oximeters.

MXS4184  0.96inch / Blue 128×48 dot & Yellow 128×16 dot

For Specification (PDF 825 KB)

OLED Sales Department, Tohoku Pioneer Corporation

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Click here for product PDF download.

* Tohoku Pioneer succeeded in the world's first mass production of OLED displays in 1997.

Tohoku Pioneer plans volume production of OLEDs | EE Times