For a fully-automated quality control of displays, systems can be implemented throughout the manufacturing process. Makers of smartphones, tablets and other display devices rely on testing to ensure a perfect end-user experience
Devices using displays must be tested and characterised by original equipment manufacturers (OEMs), integrators and those who purchase or use them in bulk. This should be done at R&D, quality control and production line levels to ensure reliability and longer life span of the displays. Applications that require a large number of equal performing units also require test and characterisation tools. The measurement system must also be configured in such a manner that it does not introduce errors into the process.
Irrespective of LCD, LED, OLED or QLED displays, parameters such as chromaticity, gamma, white balance, contrast, flicker, luminance uniformity and colour uniformity are important to characterise. For displays, evaluation starts with the highest image and signal quality. For testing LCDs, viewing angle is critical, so a straight-ahead direct view of each display is required. It is recommended to carry out the monitor test in a dark room to precisely assess dark image areas.
There are a lot of variables to test when objectively evaluating performance of a display, including brightness, black levels, colour accuracy and more. To test this, different tools are needed depending on what is being tested.
Display measurement and testing devices
Some of the T&M devices for displays are described below.
Luminance meter. This is used when only measurement of a display’s luminous intensity in units of a nit (cd/m2) or footlamberts (fl) is required.
Night vision imaging system (NVIS). For manufacturers of military displays and other lighted instrumentation used in conjunction with NVIS, compliance with MIL-L85762A and MIL-STD-3009 is required. This covers a range of 360nm to 930nm, which requires a high signal-to-noise measurement ratio of 10:1 or greater.
この記事は Electronics For You の May 2019 版に掲載されています。
7 日間の Magzter GOLD 無料トライアルを開始して、何千もの厳選されたプレミアム ストーリー、8,500 以上の雑誌や新聞にアクセスしてください。
すでに購読者です ? サインイン
この記事は Electronics For You の May 2019 版に掲載されています。
7 日間の Magzter GOLD 無料トライアルを開始して、何千もの厳選されたプレミアム ストーリー、8,500 以上の雑誌や新聞にアクセスしてください。
すでに購読者です? サインイン
Smart WATER SERVING ROBOT
With the advent of artificial intelligence, robots find application in various sectors such as industry, homes, bars, restaurants, events, agriculture, and even space.
Multi-Purpose Wire-Loop SECURITY SYSTEM
This multi-purpose security system utilises wire loops to secure items. Wire loops can be employed in various ways for security applications such as luggage security, bike security, bicycle security, room security, and door security.
The Importance Of RADIATION PATTERN OF AN ANTENNA
Look beyond an antenna’s size and gain; its radiation pattern holds the key to its performance. Understanding this can unlock a whole new perspective on wireless communication
"Capitalise On 'CHINA PLUS TWO,' Where Products With Higher Value Addition BECOME THE FOCUS"
EPIC Foundation aims to transform India into an electronics hardware product nation by collaborating with governments, universities, design houses, and startups.
ADDING LOCATION TRACKING To The Wearable Interface Device
Here’s how you can add location tracking, without GPS, to the project for a smartwatch like HID with keyboard and touchpad, which was published in March issue.
"NATUREINSPIRED ADAS ALGOS Will Be MUCH BETTER Than Robotic Paradigm Algos"
Most of the ADASenabled vehicles of today function on algorithms (algos) inspired by robots used in a logistics setup. Can ADAS algos inspired by the human brain and nature be better? In a conversation with EFY's Mukul Yudhveer Singh, Gagandeep Reehal, Co-Founder, CEO & CTO, Minus Zero, illustrates this using the 'sunset mistaken for red light' example, shedding light on where India's Minus Zero is headed!
NEW EV POLICY: Will It Kill More Than Two Birds With One Stone?
With China taking the lead in electric vehicle production and sales in many global markets, can India’s new electric vehicle manufacturing policy encourage champion brands to set up shop in India? Can this policy be the turning point for India’s automobile industry’s bid to go global?
A Device That Enables SELLING UNUSED INTERNET DATA From Your Mobile Network
What if you could sell your remaining mobile data before the end of the month or even daily? Christophe Bureau, a Board Member of DotDot, in a conversation with EFY’s Mukul Yudhveer Singh, sheds light on what the Dot device offers beyond assisting users in selling their unused internet data
"EV INDUSTRY'S In The Compounding Stage Of BATTERY CELL TECHNOLOGY"
As sodium-ion battery packs gain attention in India, does this spell a bleak future for lithium-ion batteries? Furthermore, where does hydrogen stand as a fuel cell and combustion fuel? Dr Yashodhan Pramod Gokhale, CTO of Battrix, weighs in
ASSISTIVE AI: Semiconductor Design, Manufacture, And Workforce
Together, human intelligence and AI create a powerful synergy, highlighting the vital lesson for the semiconductor workforce: adapt to new technologies
