Display platform with gate and source drivers

For large Lectum® displays we have developed a scalable platform
with multiple electrophoretic display (EPD) driver chips.

All displays developed on this platform have the following features:

  • Resolution and size of platform can be scaled by multiple driver chips
    • m x gate driver
    • n x source driver
  • external EPD controller as well as EPD power management required, reference design available

We currently offer three reference displays for the drivers-only platform: 4.7"10.7" and 15.4".

Reference display – 4.7''

The 4.7” Lectum display is an active-matrix EPD with gate and source drivers supporting 800 x 450 pixels.

This display is particularly suitable for  smartphone and logistics applications.

Reference design 4.7"
Resolution800 x 450reference design
Active area103.68 x 58.32 mm (4.7" diagonal)
Pixel density196 ppi
Bendabilitytypical 50 mm radius (except chip area)
Gray levelsup to 16
Refresh rate < 900 ms (16 gray-level) - faster for mono updates
Surfaceanti-glare / UV protection /

hard-coat 2H

Weight6 g (depending on final configuration)
Thickness670 µm
EPD controllerexternal
Evaluation kitPLDEK_T430-RV1 or PLDEK_BN-R2-RV1 or PLDEK_RP1-A1-RV1 or PLDEK_F5-HBZ3_NO
Operating conditions0°C to 50°C | 15 %rH to 85 %rH
Storage conditions-25°C to 50°C | 15 %rH to 85 %rH

 

Key features 

  • Organic TFT active matrix incorporating industry leading, bi-stable electrophoretic display technology
  • Two chip solution on COP (chip-on-plastic) and on COF (chip-on-film); can be folded behind the display
  • Thin, formable, robust, lightweight
  • Ultra-wide viewing angle
  • Ultra-low power – no continuous refresh cycles required
  • External EPD controller as well as power management required
  • Can be combined with third-party touch solutions
  • Evaluation kits available for driving images

 

 

 

Download datasheets for the 4.7'' Lectum display

Datasheet 4.7'' Lectum Display

Reference display – 10.7''

The 10.7” Lectum display is an active-matrix EPD with gate and source drivers supporting 1280 x 960 pixels.

This display is particularly suitable for e-book and signage applications.

Drivers-only displays

Overview 

Reference design 10.7"
Resolution1280 x 960reference design
Active area217.6 x 163.2 mm (10.7" diagonal)
Pixel density150 ppi
Bendabilitytypical 50 mm radius (except chip area)
Gray levelsup to 16
Refresh rate < 900 ms (16 gray-level) - faster for mono updates
Surfaceanti-glare / UV protection /

hard-coat 2H

Weight45 g (depending on final configuration)
Thickness650 µm
EPD controllerexternal
Evaluation kitPLDEK_T430-RV1 or PLDEK_F5-HBZ3_NO
Operating conditions0°C to 50°C | 15 %rH to 85 %rH
Storage conditions-25°C to 50°C | 15 %rH to 85 %rH

Key features 

  • Organic TFT active matrix incorporating industry leading, bi-stable electrophoretic display technology
  • Five chip solution on double COF (chip-on-film); can be folded behind the display
  • Thin, formable, robust, lightweight
  • Ultra-wide viewing angle
  • Ultra-low power – no continuous refresh cycles required
  • External EPD controller as well as power management required
  • Can be combined with third-party touch solutions
  • Evaluation kits available for driving images

Reference display – 15.4''

The 15.4” Lectum display is an active-matrix EPD with gate and source drivers supporting 1920 x 1280 pixels.

This display is particularly suitable for signage and large screen applications.

Display platform with ultrachip

Overview 

Reference design 15.4"
Resolution1920 x 1280reference design
Active area326.4 (+1.5 mm gap) x 217.6 mm (15.4" diagonal)
Pixel density150 ppi
Bendabilitytypical 20 mm radius (except chip area)
Gray levelsup to 16
Refresh rate < 900 ms (16 gray-level) - faster for mono updates
Surfaceanti-glare / UV protection /

hard-coat 2H

Weight92 g
Thickness800 µm
EPD controllerexternal
Evaluation kitPLDEK_F5-HBZ3_P2
Operating conditions0°C to 50°C | 15 %rH to 85 %rH
Storage conditions-25°C to 50°C | 15 %rH to 85 %rH

Key features 

  • Organic TFT active matrix incorporating industry leading, bi-stable electrophoretic display technology
  • 2-up tiled assembly for double size active area (compared with 10.7" display)
  • Multi-chip solution on double COF (chip-on-film); can be folded behind the display
  • Thin, formable, robust, lightweight
  • Ultra-wide viewing angle
  • Ultra-low power – no continuous refresh cycles required
  • External EPD controller as well as power management required
  • Can be combined with third-party touch solutions
  • Evaluation kits available for driving images

Evaluation Kits

We offer evaluation kits for all display platforms enabling customers
to evaluate our display technology both quickly and easily.

For Lectum displays developed using gate and source drivers there is a
choice of two: Parrot MSP430 and Freescale i.MX5.

Parrot MSP430

The Parrot MSP430 evaluation kit includes an MSP430 microcontroller on a Parrot processor board.

The MSP430 microcontroller software is based on C-code. Additional software packages or changes require a separate JTAG programmer.

In combination with the MSP430 microcontroller, a Raven reference design board with 'must-have' electronics is also provided. This interface board contains an EPSON S1D13524 EPD controller, a power management IC (PMIC), a DRAM and passives, because the related displays only come with integrated gate and source drivers.

Parrot MSP430 eval. kit

Images not to scale

Technical parameters 

Evaluation kit codeParrot MSP430: PLDEK_T430-RV1
Compatible displays10.7"
Display EPD controllern/a
External EPD controllerEpson S1D13524
Reference design boardRaven, containing EPD controller, power management & RAM
System processorMSP430F5438A (on Parrot)
System operating systemNone (microcontroller unit)
System data exchangeJTAG programmer
Interface board RuddockOptional
MiscellaneousSmall size; low power; µC only; C-code display for operation available

Freescale i.MX5

This evaluation kit includes a FREESCALE i.MX5 board.

The FREESCALE i.MX5 runs on Linux, which contains the necessary frame buffer drivers. Additional scripting is possible.

A reference design board is not necessary since the FREESCALE i.MX5 board already contains: a system-on-chip processor and EPD controller; power management IC (PMIC); memories and passives.

Freescale i.MX5 eval. kit

Images not to scale

Technical parameters 

Evaluation kit codeFreescale i.MX5: PLDEK_F5-HBZ3_NO / PLDEK_F5-HBZ3_P2
Compatible displays10.7” / 15.4”
Display EPD controllern/a
External EPD controllerFreescale i.MX5 on HBZ3. 1 with integrated EPD controller (plus power supply V1.3 for 15.4”)
Reference design boardn/a
System processorFreescale i.MX5
System operating systemLinux
System data exchangeUSB / Ethernet / Serial
Interface board Ruddockn/a
MiscellaneousSystem-on-chip (integrated MCU and EPD); standard interface for system extensions; Linux framebuffer driver; software development kit

Sample pricing for drivers-only platform

  • 10.7" display $350*/each
  • 15.4" display $800*/each
  • MSP430 evaluation kit
    (PLDEK_T430-RV1) $800*/each
    (display not included)
  • Freescale evaluation kit
    (PLDEK_F5-HBZ3_NO) $1600*/each
    (display not included)
  • Freescale evaluation kit
    (PLDEK_ F5-HBZ3_P2) $1875*/each
    (display not included)

* Pricing does not include shipping, customs or taxes

Order samples today

Send us your request for quotation, product inquiry or general questions.

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Need a different display size?

We have developed a range of display platforms based on different EPD controllers required to drive the respective Lectum design. Reference displays and evaluation kits, including software, are available. Please choose a platform or select custom design to discover how we can best support your display needs.

Ultrachip
platform

Reference display size:
1.38''

Epson
platform

Reference display size:
4.0'' and 4.9''

Drivers-only platform - FAQ


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.


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.


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.


Why does Plastic Logic Germany offer different display platforms?

All EPD displays require an EPD controller and Lectum displays are no exception. Our reference displays use integrated hardware controllers. Different EPD controllers mainly differ in the maximum number of supported pixels as well as in cost. Depending on display requirements, we have selected some of the optimum EPD controllers and created a display platform based on each one. Discover more about the different platforms we offer here.

It is important to note that the number of pixels is not only dependent on the active display area but also on the pixel density (ppi).


Why is there more than one evaluation kit for some of the reference designs and not for others?

In order to simplify the integration of our Lectum displays, we have developed multiple evaluation kit options for certain platforms, such as µC-based and Linux-based. This covers a wide range of potential applications and makes life easier for designers.


What information is required in order to initiate a custom-design?

We require the following information from you in order to begin custom-design activities: display active area; pixel density; bezel size; location of driver electronics; COF/COP; overall module size including tolerances.


How do you decide which platform a custom design will be based on?

An initial analysis of the requested display active area and the pixel density (as well as a few other boundary conditions) informs the decision about the appropriate display platform. This happens as part of a milestone plan, which we have to developed, enabling a step-by-step development approach.


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.