Hello

Welcome lekule blog

Hi, I`m Sostenes, Electrical Technician and PLC`S Programmer.
Everyday I`m exploring the world of Electrical to find better solution for Automation.
together in the world. #lekule86
Join us on

E-paper Displays: Improving the User Experience of Low-Power Devices

Critical to the success of any product is its user experience. From household appliances through to websites, the ones that succeed are both functional and easy–or even enjoyable–to use.
Sensors and other devices destined for the Internet of Things (IoT) are no different. While the primary requirement for most connected equipment is to send and receive data to and from the cloud, there are lots of examples where having a display on the device itself would make it even more compelling to potential buyers.

For example, imagine a network of connected, battery-powered temperature or humidity sensors in a manufacturing environment. For someone on the ground tasked with monitoring the factory, being able to take an instant sensor reading without using a separate, cloud-connected device is quicker, easier, and, in some cases, safer. As a result, a sensor with a built-in display could facilitate faster and better-informed operational decision-making.

The Power Budget Conundrum

However, getting a display into a remote, battery-powered IoT kit is typically thwarted by the limited power budget. Because many sensors have to run for months or even years on a single battery, such as a CR2032 coin-cell, traditional TFT displays are out of the question. An always on, two-inch TFT LCD on its own would eat through over 1,000 such batteries in a year – and that’s before you even consider powering the sensor itself, its communications chip or other components required to make it work.
There are two main reasons why TFT LCDs require so much power. Firstly, to display even a still image, such as sensor reading, TFT displays need to be refreshed around 50 times a second. Each refresh uses power, which quickly adds up. Secondly, TFT LCDs then require a power-hungry backlight to make the image visible.
So the key to getting a display into a device running on a small battery is to eliminate these two big users of power, and this is exactly what e-paper does.

E-Paper: The Low-Power Game-Changer

E-paper displays are commonly found in e-readers, including the Amazon Kindle. They’re different from TFT LCDs in that they don’t require constant refreshing to keep the same image visible, and only use power when you change what’s on the display. For IoT applications, where sensor readings are sometimes only updated a handful of times a day, e-paper is a real game-changer when it comes to power consumption. For example, an always-on, two-inch-diagonal e-paper display, updated six times a day, would require just over 0.001% of the daily power the same-size TFT LCD would.


Amazon's Kindle with e-paper display. Image courtesy Xxolgaxx

This is made possible by the way e-paper displays work. Simply put, each ‘pixel’ is a tiny capsule containing ‘ink’ particles, which are typically black and white (though red is also available). The white particles are positively charged and the black ones negatively. When you apply a positive charge to the top of a capsule, you draw the black particles into view, creating a dark area on the display. Applying a negative charge brings the white into view, resulting in a clear area. You do this across the whole screen to build up an image. The beauty of it is that because the technology is ‘bistable’, once the particles are in position, they’ll remain there, using no power, until you apply an opposing charge.
This approach of creating an image using physical ink particles also means e-paper displays don’t require a backlight. Instead, ambient light reflects off the display in the same way it does off printed ink and paper, creating a visible image that human eyes (and barcode scanners) can see.

Getting Started with E-Paper Displays

Another thing to consider when it comes to e-paper displays is how easy and low-cost they are to try out, whether you’re a professional product designer or a tech enthusiast.
For examples, you can use an Arduino UNO or MEGA 2560 with a dedicated e-paper display extension board. This particular board enables you to try out displays up to 4.2 inches in size. Once you’ve got your kit, it’s a question of downloading some code files from GitHub, creating the image you want to display, updating the code to point it at your new file, and uploading the image to your Arduino.


An Arduino with an e-paper display extension board. Image courtesy of Pervasive Displays

A Popular Choice for the IoT

E-paper is a game-changer when it comes to adding displays to equipment with very limited power budgets: it opens up a whole new range of possibilities for designers to dramatically enhance the user experiences their products offer. Moreover, the ease with which you can experiment with e-paper in your designs–not to mention the relatively low investment required–explains why so many in the IoT world are now including e-paper displays in their equipment.


Industry Articles are a form of content that allows industry partners to share useful news, messages, and technology with All About Circuits readers in a way editorial content is not well suited to. All Industry Articles are subject to strict editorial guidelines with the intention of offering readers useful news, technical expertise, or stories. The viewpoints and opinions expressed in Industry Articles are those of the partner and not necessarily those of All About Circuits or its writers.

Share this:

ABOUTME

Hi all. This is deepak from Bthemez. We're providing content for Bold site and we’ve been in internet, social media and affiliate for too long time and its my profession. We are web designer & developer living India! What can I say, we are the best..

Post a Comment
My photo

Hi, I`m Sostenes, Electrical Technician and PLC`S Programmer.
Everyday I`m exploring the world of Electrical to find better solution for Automation. I believe everyday can become a Electrician with the right learning materials.
My goal with BLOG is to help you learn Electrical.

Labels

LEKULE TV EDITORIALS ARTICLES DC ROBOTICS DIGITAL SEMICONDUCTORS GENERATOR AC EXPERIMENTS MANUFACTURING-ENGINEERING REFERENCE FUNDAMENTAL OF ELECTRICITY ELECTRONICS ELECTRICAL ENGINEER MEASUREMENT TRANSDUCER & SENSOR VIDEO ARDUINO RENEWABLE ENERGY AUTOMOBILE TEARDOWN SYNCHRONOUS GENERATOR DIGITAL ELECTRONICS ELECTRICAL DISTRIBUTION CABLES AUTOMOTIVE MICROCONTROLLER SOLAR PROTECTION DIODE AND CIRCUITS BASIC ELECTRICAL ELECTRONICS MOTOR SWITCHES CIRCUIT BREAKERS CIRCUITS THEORY PANEL BUILDING ELECTRONICS DEVICES MIRACLES SWITCHGEAR ANALOG MOBILE DEVICES WEARABLES CAMERA TECHNOLOGY COMMUNICATION GENERATION BATTERIES FREE CIRCUITS INDUSTRIAL AUTOMATION SPECIAL MACHINES ELECTRICAL SAFETY ENERGY EFFIDIENCY-BUILDING DRONE CONTROL SYSTEM NUCLEAR ENERGY SMATRPHONE FILTER`S POWER BIOGAS BELT CONVEYOR MATERIAL HANDLING RELAY ELECTRICAL INSTRUMENTS ENERGY SOURCE PLC`S TRANSFORMER AC CIRCUITS CIRCUIT SCHEMATIC SYMBOLS DDISCRETE SEMICONDUCTOR CIRCUITS WIND POWER C.B DEVICES DC CIRCUITS DIODES AND RECTIFIERS FUSE SPECIAL TRANSFORMER THERMAL POWER PLANT CELL CHEMISTRY EARTHING SYSTEM ELECTRIC LAMP FUNDAMENTAL OF ELECTRICITY 2 BIPOLAR JUNCTION TRANSISTOR 555 TIMER CIRCUITS AUTOCAD BLUETOOTH C PROGRAMMING HOME AUTOMATION HYDRO POWER LOGIC GATES OPERATIONAL AMPLIFIER`S SOLID-STATE DEVICE THEORRY COMPUTER DEFECE & MILITARY FLUORESCENT LAMP INDUSTRIAL ROBOTICS ANDROID ELECTRICAL DRIVES GROUNDING SYSTEM CALCULUS REFERENCE DC METERING CIRCUITS DC NETWORK ANALYSIS ELECTRICAL SAFETY TIPS ELECTRICIAN SCHOOL ELECTRON TUBES FUNDAMENTAL OF ELECTRICITY 1 INDUCTION MACHINES INSULATIONS USB ALGEBRA REFERENCE HMI[Human Interface Machines] INDUCTION MOTOR KARNAUGH MAPPING USEUL EQUIATIONS AND CONVERSION FACTOR ANALOG INTEGRATED CIRCUITS BASIC CONCEPTS AND TEST EQUIPMENTS DIGITAL COMMUNICATION DIGITAL-ANALOG CONVERSION ELECTRICAL SOFTWARE GAS TURBINE ILLUMINATION OHM`S LAW POWER ELECTRONICS THYRISTOR BOOLEAN ALGEBRA DIGITAL INTEGRATED CIRCUITS FUNDAMENTAL OF ELECTRICITY 3 PHYSICS OF CONDUCTORS AND INSULATORS SPECIAL MOTOR STEAM POWER PLANTS TESTING TRANSMISION LINE C-BISCUIT CAPACITORS COMBINATION LOGIC FUNCTION COMPLEX NUMBERS CONTROL MOTION ELECTRICAL LAWS INVERTER LADDER DIAGRAM MULTIVIBRATORS RC AND L/R TIME CONSTANTS SCADA SERIES AND PARALLEL CIRCUITS USING THE SPICE CIRCUIT SIMULATION PROGRAM AMPLIFIERS AND ACTIVE DEVICES APPS & SOFTWARE BASIC CONCEPTS OF ELECTRICITY CONDUCTOR AND INSULATORS TABLES CONDUITS FITTING AND SUPPORTS ELECTRICAL INSTRUMENTATION SIGNALS ELECTRICAL TOOLS INDUCTORS LiDAR MAGNETISM AND ELECTROMAGNETISM PLYPHASE AC CIRCUITS RECLOSER SAFE LIVING WITH GAS AND LPG SAFETY CLOTHING STEPPER MOTOR SYNCHRONOUS MOTOR AC METRING CIRCUITS BECOME AN ELECTRICIAN BINARY ARITHMETIC BUSHING DIGITAL STORAGE MEMROY ELECTRICIAN JOBS HEAT ENGINES HOME THEATER INPECTIONS LIGHT SABER MOSFET NUMERATION SYSTEM POWER FACTORS REACTANCE AND IMPEDANCE INDUCTIVE RECTIFIER AND CONVERTERS RESONANCE SCIENTIFIC NOTATION AND METRIC PREFIXES SULFURIC ACID TROUBLESHOOTING TROUBLESHOOTING-THEORY & PRACTICE 12C BUS APPLE BATTERIES AND POWER SYSTEMS DC MOTOR DRIVES ELECTROMECHANICAL RELAYS ENERGY EFFICIENCY-LIGHT INDUSTRIAL SAFETY EQUIPMENTS MEGGER MXED-FREQUENCY AC SIGNALS PRINCIPLE OF DIGITAL COMPUTING QUESTIONS REACTANCE AND IMPEDANCE-CAPATIVE SEQUENTIAL CIRCUITS SERRIES-PARALLEL COMBINATION CIRCUITS SHIFT REGISTERS WIRELESS BUILDING SERVICES COMPRESSOR CRANES DIVIDER CIRCUIT AND KIRCHHOFF`S LAW ELECTRICAL DISTRIBUTION EQUIPMENTS 1 ELECTRICAL DISTRIBUTION EQUIPMENTS B ELECTRICAL TOOL KIT ELECTRICIAN JOB DESCRIPTION INDUSTRIAL DRIVES LAPTOP SCIENCE THERMOCOUPLE TRIGONOMENTRY REFERENCE UART oscilloscope BIOMASS CONTACTOR ELECTRIC ILLUMINATION ELECTRICAL SAFETY TRAINING ELECTROMECHANICAL FEATURED FILTER DESIGN HARDWARE JUNCTION FIELD-EFFECT TRANSISTORS NASA NUCLEAR POWER VALVE COLOR CODES ELECTRIC TRACTION FLEXIBLE ELECTRONICS FLUKE GEARMOTORS INTRODUCTION LASSER PID PUMP SEAL ELECTRICIAN CAREER ELECTRICITY SUPPLY AND DISTRIBUTION MUSIC NEUTRAL PERIODIC TABLES OF THE ELEMENTS POLYPHASE AC CIRCUITS PROJECTS REATORS SATELLITE STAR DELTA VIBRATION WATERPROOF