FDI ELI70-CR Touch Screen LCD Module User Manual
- July 15, 2024
- FDI
Table of Contents
FDI ELI70-CR Touch Screen LCD Module
Important Legal Information
Information in this document is provided solely to enable the use of Future Designs, Inc. (FDI) products. FDI assumes no liability whatsoever, including infringement of any patent or copyright. FDI reserves the right to make changes to these specifications at any time, without notice. No part of this document may be reproduced or transmitted in any form or by any means, electronic or mechanical, for any purpose, without the express written permission of Future Designs, Inc. 996 A Cleaner Way, Huntsville, AL 35805.
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© 2024 Future Designs, Inc. All rights reserved.
Revision: 1.05, 3/18/2024
Introduction
About ELI
ELI® is Future Designs, Inc.’s family of long-life, plug-and-play embedded
displays. ELI products are true modular embedded display solutions that
require no engineering or lead time. All ELI products are compatible with a
wide range of single-board computers including Raspberry Pi, BeagleBone Black,
and Windows-based units. FDI designed ELI as an embedded display option that
requires minimal development time to help customers reach production quickly.
Once a product is in production, FDI’s 10-15-year ELI product availability
guarantee helps ensure production schedules without the risk of expensive or
time-consuming redesigns. Learn more about ELI at TeamFDI.com/ELI.
ELI Compatibility
ELI products are compatible with most single-board computers, PCs, and
operating systems. See https://www.teamfdi.com/product-
details/eli70-cr#compatibility for the results of FDI’s compatibility tests
with popular operating systems and platforms. Our results, as indicated in the
table, demonstrate ELI’s versatility but the table is not exhaustive. ELI
products are designed to work with any single-board computer that has an HDMI
or DVI output. To submit a question about ELI’s compatibility with a platform
or operating system that is not included in the table, contact a member of the
FDI support team at
Support@teamfdi.com.
Your ELI Experience
Share your experience connecting ELI devices to various (single board)
computers at: https://www.teamfdi.com/edid/#edidform.
ELI70-CR Box Contents
- ELI70-CR
Optional Accessories Recommended for Use (Purchased Separately)
- 12V DC (+/- 5%) 2A Power Supply with a center positive barrel plug
- 2.1mm I.D. x 5.5mm O.D. x 9.5mm
- All ELI units operate from +12V DC so this is the recommended power supply input voltage for the entire Family. ELI70-CR units from Rev 2.3 and greater are also capable of operation from a range of +5 to 24V DC (+/- 5%)
- USB Type A to Mini Type B Cable (For touch)
- HDMI Cable (Type A Male)
ESD Warning
- Our ELI units are shipped in a protective anti-static package. Do not subject the module to high electrostatic potentials. Exposure to high electrostatic potentials may cause damage to the boards that will not be covered under warranty.
- General practice for working with static-sensitive devices should be followed when working with this device.
Determining the Revision of your ELI
All ELI devices have a label placed on the board to identify the part number
and revision of the unit. This label will help you quickly and correctly
identify your ELI unit’s part number and revision number. An example of an ELI
label is shown below.
Technical Specifications
Connections
Power Details
A 12VDC +/- 5% power supply with a 2.0A output will power any board from the
ELI Family. This allows a common, off-the-shelf power supply such as the T1071
-P5P-ND to be used for quick demos or prototyping across the entire ELI
Family. In general, any 12VDC power supply with a 2.1mm center positive plug
will be acceptable if it can provide enough current to power the particular
ELI unit being used.
For volume production applications, the input power can be optimized for your particular ELI unit and lower capacity power supplies can be used.
On the ELI70-CR plug power into the (P2) connector. In cases where the barrel
connector is not desired, you can use the alternate power input connector (J8)
which supports directly plugging in 20-26 AWG wire with maximum 5A current per
contact. The datasheet for this J8 connector (PCB terminal block – PTSM 0,5/
2-2,5-H SMD WH R24 – 1814634) can be found at
https://tinyurl.com/1814634.
On ELI70-CR units of Revision ≥2.3 and above, the input power range is expanded from +5 to 24V DC ± 5% (2.0A) for greater design flexibility.
To verify that the ELI70-CR unit is correctly powered you may check input voltage with a Fluke multi-meter or scope by probing the +12V and GND contacts shown below. Please verify that the input voltage is present, and within the +/- 5% tolerance and is free from excessive noise or AC ripple.
Note: If using an input that is within the acceptable range of an ELI70-CR (Rev 2.3 and above), 5 to 24VDC (+/- 5%), please keep in mind that the 12V Test points should be at the voltage of your chosen power supply (5-24VDC).
Extended Display Information Data (EDID)
ELI has fully working EDIDs for easier compatibility with many display
adapters. You can find out more on our website at
https://www.teamfdi.com/edid/.
PWM Control of Backlight
J5 mating connector housing information:
- Manufacturer: Hirose
- Part Number : DF12-3S-1.25C
- Digi-Key Link: https://www.digikey.com/products/en?keywords=H2180-ND
- Pre-terminated wires https://www.digikey.com/products/en?PPV=1811-9-566967
ELI provides an input so an external processor can control the display backlight to vary the display brightness or to reduce power consumption (the display backlight is typically one of the larger sources of power consumption in the system). PWM dimming is an input with a 0 to 3.3 VDC range and the user should drive this with a push-pull type output or a suitable open collector output.
To control the display backlight, the user should connect an externally generated Pulse Width Modulated (PWM) signal to J5 pin 2 along with a common ground to J5 pin 3. The frequency range for this signal is from 5KHz to 100KHz. Each ELI unit’s unique display backlight properties will vary, so the user should test their version for an acceptable range of brightness control. For example, the actual display 0 to 100% brightness range may only be 40% to 90% of the PWM range. In certain installations, a series resistor may be required to ensure a clean PWM signal is provided to the ELI. The suggested value for the resistor is 100ohms. See Figure 6 below for example of connectivity. Actual testing in your installation may require this resistor to be changed, or possibly not required at all.
On the ELI unit, the PWM dimming signal is pulled up to VDD providing 100% backlight power when no PWM signal is applied at pin 2 of J5. If nothing is connected to J5, the ELI will drive the display at 100% brightness (default).
The VDD output at pin 1 of J5 is a 3.3VDC ± 5%. ELI provides the 3.3VDC
signal, called VDD, for the external system in case this voltage is needed to
generate the correct levels on the PWM Dimming Input. If the external system
is capable of directly driving the PWM dimming signal at 3.3VDC, there is no
need to connect pin 1 to the cable. 
The ELI backlight can be controlled from a Raspberry Pi. See Figure 6 for a wiring diagram. Our software is available on the FDI website at https://www.teamfdi.com/product-details/eli70-cr#software or you may copy the code from here:
/* Changes brightness of ELI backlight given a command line argument between 0
and the set range. Uses bcm2835 header file provided by Broadcom at
https://www.airspayce.com/mikem/bcm2835/bcm2835-1.52.tar.gz This source code
must be compiled using”g++ brightness. cpp -o brightness -l bcm2835″ to
properly link the header file. Must be run using sudo, accessing GPIO pins
requires root permissions. After compiling, you may add an executable to
“/usr/bin” which allows you to type “sudo brightness
The ELI backlight can also be controlled from a Renesas Synergy S7G2 wired as shown in Figure 8. The software for Synergy can be found on our website at https://www.teamfdi.com/product-details/eli70-cr#software.
Mechanical View
- Tape used for the LCD to PCB Attachment: 3M VHB 4959 ½” width
- 4 screw holes on the ELI70-CR accept up to #8 size screws for mounting into an enclosure and connect to the system ground directly.
- The exposed ground pads may be used to connect the ELI70-CR PCB directly to the LCD using copper or aluminum foil tape to help meet ESD requirements.
Support
Where to Get Help
Online technical support is available at https://www.teamfdi.com/support/.
Useful Links
Future Designs, Inc. Forums: https://www.teamfdi.com/forum
- ELI70-CR Product Page: https://www.teamfdi.com/product-details/eli70-cr/
- ELI Software User’s Manual: https://www.teamfdi.com/wp-content/uploads/ELI-Software-Users-Manual.pdf
- Tell us about your ELI experience: https://www.teamfdi.com/edid/#edidform
- EDID Information Page: https://www.teamfdi.com/edid/
Copyright ©2024, Future Designs, Inc.
References
- airspayce.com/mikem/bcm2835/bcm2835-1.52.tar.gz
- DF13-3S-1.25C Hirose Electric Co Ltd | Connectors, Interconnects | DigiKey
- Electronic Components and Parts Search | DigiKey Electronics
- Home - FDI - Future Designs Inc.
- Home - FDI - Future Designs Inc.
- Extended Display Identification Data (EDID) - FDI - Future Designs Inc.
- Extended Display Identification Data (EDID) - FDI - Future Designs Inc.
- Home - FDI - Future Designs Inc.
- Support - FDI - Future Designs Inc.
- Home - FDI - Future Designs Inc.
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