Custom glass-free display solutions

If you have a specific design in mind and none of our reference designs are suitable,
why not consider a bespoken Lectum® design?

We are the experts in glass-free, flexible display manufacturing and
have developed a project program for customized display solutions.

Bridging the gap

We don’t just have a lot of experience in designing glass-free, flexible electrophoretic displays (EPD); we also have a great deal of experience designing displays with and specifically for customers. If you have an idea, but don’t know how to make it work, then have no fear. We do!

Our custom project program consists of four or five stages (depending on your specifications and budget) including design evaluation, development and production. All custom projects are subject to NRE and a minimum order quantity.

Photo of design engineer at desk

Getting started

In order to begin custom design activities, it is important for the customer to define the following requirements:

  • display active area
  • pixel density
  • bezel size
  • location of driver electronics
  • COF/COP
  • overall module size including tolerances

You're just one click away from your custom design!

If you have already determined these details, contact us to find out how our flexible display technology can solve your product design dilemma today.

If not, please read on below.

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Choosing a platform

All Lectum® displays are based on one of three platforms, which we have developed using specific, market-leading EPD controllers:

  • Smaller Lectum displays are designed using the Ultrachip UC8156
  • Lectum displays with a larger number of pixels are designed using the Epson S1D13541
  • A scalable platform with multiple EPD driver chips has been developed for large Lectum displays.

We select the appropriate display platform for your custom design based on an initial analysis of the requested display active area and the pixel density. This is an integral part of our in-house project plan.

Transparency and satisfaction

When it comes to developing custom displays, it is important that the process is transparent and that issues are identified and dealt with early. This is why we have established our own project program, enabling a step-by-step evaluation and development approach to your personalized display solution.

This project program has been the key to all of our successful partnerships where custom plastic displays have been required.

General check
Timeline1 day
Results• Technically possible / impossible
• Expected costs for phase 2
Design feasibility check
Timeline1-5 days
Results• Technical assessment
• Design options
• Estimated pricing information for the design options
• Recommendations
• Expected costs for phase 3
Design study
Timeline2-3 weeks
Results• Drawings
• Preliminary target specification
• Volume price (requires forecast)
• Timeline for engineering samples
• Timeline for qualification and ramp up
• Expected costs for phase 4
Option AOption B
Engineering mask design, mask order, first engineering samples, no qualificationMask design, mask order, first samples, qualification
Timeline3-4 monthsTimeline6 months
Results• 20-50 engineering samples (to be defined)
• Volume-limited output for additional samples
Results• Redesign / optimization possible
• 50…100 samples (to be defined)
• Qualified display module

When only the best will do

Contact us with your design specifications and find out how we can develop the best bespoken glass-free display solutions for your great new product.

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Discover the Lectum® display platforms

Every EPD display requires an EPD controller and Lectum displays are no exception.
EPD controllers mainly differ in the maximum number of supported pixels and each of our platforms 
is, therefore, suited to a specific dimension of display. It should be noted that the number of pixels
is not only dependent on the active display area but also on the pixel density (ppi).

Click on your preferred platform below to discover more about the reference displays,
evaluation kits and software on offer.

Ultrachip
platform

Reference display size:
1.38''

Epson
platform

Reference display size:
4.0'' and 4.9''

Drivers-only
platform

Reference display size:
10.7'' and 15.4''

FAQ


How flexible are Lectum displays?

Unlike conventional glass-based EPDs, Lectum displays are plastic based and therefore the only truly flexible, active-matrix EPDs on the market. They have a typical bendability radius of 50 mm.


Can I fold Lectum displays?

It is possible to bend Plastic Logic displays, but not to fold them. The display bendability radius is typically 50mm, but ultimately depends on the display type and product integration concept.


What is the resolution of Lectum displays?

The resolution of our Lectum displays varies depending on the size. Please refer to the respective datasheet for more details.


How many gray levels do Lectum displays have?

Lectum displays can have up to 16 gray levels. However, this number can vary depending on the display size. Please refer to the respective datasheet for more details.


Are Lectum displays available in color?

Lectum EPDs are not currently available in color. In the past, the company has demonstrated the ability to produce color displays, however, this process has not yet been industrialized for mass production.


What is the refresh rate for Lectum displays?

The refresh rate refers to how quickly a new image can be updated on the screen. Due to the nature of the EPD media, this can be marginally slower than for conventional flat panel displays, such as LCDs. Plastic Logic EPDs have a refresh rate <900 ms, whereby a faster refresh rate is possible in the case of a black/white display without gray-scale


Is video possible on Lectum EPDs?

Plastic Logic Germany has demonstrated animation (12 fps) on its EPDs. However, the faster update rate of the electrophoretic display media, which is required, results in a much higher power requirement than usual as well as a decrease in the display lifetime.


How much power do Lectum displays require?

Our Lectum displays are truly bi-stable meaning power is only needed for an update and not to show a static image. The energy required for a typical image update depends on the display size and driver chip setup; starting at just a few mJ per update for smaller displays, allowing battery-less NFC applications. For details please refer to the respective datasheet.


What is the temperature range for Lectum displays?

Depending on the size and configuration, Lectum displays can operate in conditions of 0°C to 40°C or 50°C and can be stored between -25°C and 40°C or 50°C, whereby the image remains unaltered.


Why is the temperature range limited?

The temperature range for Lectum displays is determined by the electrophoretic display media used, which consists of microcapsules filled with a clear fluid. Low temperatures raise the viscosity of this fluid typically resulting in a slower response time for image updates. That is why the manufacturer states operation at a minimum of 0°C.


What is electrophoretic technology?

Electrophoretic technology refers to the process whereby thousands of microcapsules, containing (negatively charged) black and (positively charged) white pigments suspended in a clear fluid, are encapsulated in a plastic sheet.

When a charge (positive or negative) is applied, the corresponding particles move to the top of the microcapsule and the surface appears black or white in this specific area. When the charge is removed, the particles stay where they are. This is called bi-stability: where something can rest in either of two states.

In the case of an EPD, the text and/or images remain on the screen until the next update and the user can continue to view the content without the need for battery power. This means EPDs are inherently low-power and is one of the main differentiators to conventional backlit flat panel displays, where a constant power supply is required to maintain content.


What is a bi-stable display?

A bi-stable display makes use of a bi-stable technology, in this case electrophoresis. The image on a bi-stable display is retained and can be read without a power supply, meaning that any device using such a display is generally deemed to be “low-power”. For example, an eReader only uses battery power when the user turns a page and not when the content is static and being read, which is why many of these devices can claim to have a battery life of up to several weeks between charges. (N.b. eReaders do also require battery power for connectivity, touch, standby and any front light.)