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We define EPD as a reflective display media that offers the best properties of Paper & Displays, or best of both worlds. Paper excels in legibility and its ability to display without electricity, while Displays have the ability to change its contents.
EPD feature 3 key benefits: Ultra-low power consumption, High legibility, and Thin & light form factor.
Well-known applications are eReaders and ESL, or Electronic Shelf Labels found in retail stores.

n addition to “image stability” mentioned above, an EPD does not require a backlight but rather reflects incoming light, i.e. is a reflective display, and also features near-180 degree viewing angle, making it very different from an LCD.
Having such characteristics that are similar to those of paper, an EPD is easy on the eyes even when viewed for a long time, and has high legibility in bright environments such as outdoors etc.

TOPPAN uses EPD material developed and produced by E Ink.
There are at least 2 approaches to create a Color EPD: one is to use a Color Filter to show 4,096 colors, another is to use Color Pigments to show Black, White & Red, or Black, White & Yellow.
E Ink is developing a “Full Color” EPD that can show 32,000 colors.

Since EPD works on the principle of electrophoresis, i.e. charged pigments inside a microcapsule or microcup being moved by pixel-based electric fields, it is not well-suited for fast movements such as video.
In general, an EPD is not capable of showing video with results similar to an LCD.

An EPD is made by combining a Front Plane Laminate, the display component with microcapsule or microcup layer, with a Backplane for Driving. Thus, the size of an EPD depends on the size of both the Front Plane Laminate & Backplane.
We can propose an EPD that suits your need from the lineup of possible candidates.

Whether an EPD can be bent depends on the components used in the display.
In general, a Segmented EPD uses flexible substrates and a Dot Matrix EPD uses glass substrates (there are exceptions).
However, even when flexible substrates are used, use cases that include extreme curvatures or repeated folding is not possible.

It depends on how bright you run them. At 100 lm, panels have an L70 of 100,000 hrs. At 300 lm, panels have L70 of 30,000 hrs. L70 is an industry measurement of LED lifetime. When an LED (inorganic or organic) loses 30% of its brightness or rather produces only 70% of its rated or intial brightness it is considered to have reached the end of its useful life. L70 is the measurement, in hours, of the time it takes to reach that point.

You can’t bend the glass substrate panels.

Plastic panels are ok to bend. There is a limited bending radius that can be found from the datasheet. Within that limit, you can bend the plastic panels almost endlessly.

Basically, OLED lighting can be used only in indoor lighting at the moment. For example, LG Display informs in the datasheets of their panels, that operating temperature has to be over zero degrees of Celsius, and this applies also to storage temperature. Only transport temperature can be lower than zero degrees of Celsius, but only for a limited time.

Typical recommended operating temperature range is 0..40°C.

An LED display consists of many closely-spaced LEDs. By varying the brightness of each LED, the diodes jointly form an image on the display.

LEDs have become a mainstay since replacing LCDs. Due to their low power output, bright displays, and longevity, they have become a non-negotiable choice for content consumers. Although LEDs pride themselves as energy-efficient, they still consume significant power. It varies according to size and brightness level.

Sizing Flexibility. With LED, you no longer have to confine yourself to set sizes or shapes. …
Seamless Appearance. Tiled monitors used to be the norm, but one of the biggest downsides of this option were the seams. …
Picture Quality. …
Long Lifespans.

An OLED display have the following advantages over an LCD display: Improved image quality – better contrast, higher brightness, fuller viewing angle, a wider color range and much faster refresh rates. Lower power consumption. Simpler design that enables ultra-thin, flexible, foldable and transparent displays

OLED displays have many advantages over traditional LCDs, like higher contrast ratios and better viewing angles. However, they also have disadvantages, such as shorter lifetime and vulnerability to humidity. In addition, AMOLEDs are more expensive than LCDs, so they may not be suitable for everyone’s budget.