DISPLAYS & Uls refl ection (AR), anti-glare (AG) or anti- smudge surface fi nishes can
improve the optical performance of the display and boost readability in differing ambient light environments. A TFT display module featuring an optically bonded cover glass and surface coating can reduce undesirable internal and external refl ections to less than 0.2% by scattering and absorbing ambient light. Display resilience and resistance to impact and vibration can also be enhanced with optical bonding. On-display bonding techniques allow the integration of screen- printed cover glass, toughened protective glass, and touch screen sensors to produce highly desirable front panel aesthetics in many different applications. Glass bonding technology has been successfully implemented with TFT displays used in aerospace, marine, automotive and healthcare environments.
Touch screens
When compared with resistive touch screens, projected capacitive (P-Cap) touch solutions can be considered for applications, which require a more robust interface solution offering highly accurate and more fl exible gesture interactions.
Recent developments in pressure-activated resistive multi-touch technology provide an alternative solution by retaining the EMI
shielding property of traditional resistive touch while still offering the capability of multiple touch points.
Interface electronics
Interfacing a display to drive electronics can prove challenging with an array of different data interfaces such as parallel RGB, MIPI (Mobile Industry Processor Interface) are supported on small to medium-size display modules. Embedded computing platforms rarely support these data interface types directly with an adapter board being required. Embedded SBCs will generally support the following display interface types of HDMI, DVI-D, LVDS, HDMI, DP (DisplayPort) and eDP (embedded DisplayPort). Local display suppliers should have the ability to readily supply and support interface and adapter boards, and interconnect solutions to enable embedded computers to easily drive off-the-shelf TFT displays.
Robust by design
Harsh operating environments can create unique demands on electronic systems featuring integrated display modules, such as: temperature extremes, mechanical shock and vibration, electrical noise; and high ambient light levels may present reliability issues and ease-of-use challenges.
Industrial display modules should be inherently reliable, featuring fully enclosed
bezels, mechanical mounting fi xtures and internal design considerations that are able to provide dependable operation in rugged-use environments. Genuine industrial-specifi ed displays will have been designed and rigorously tested to provide enhanced environmental operating characteristics. An operating temperature range of -30˚C to 85˚C will cover variations in operating temperature found in most outdoor and indoor environments. High brightness, long life, white LED backlights now predominate, with 100K hour to half brightness lifetime now commonplace in true industrial specifi cation display modules. This equates to in excess of 10 years permanent ‘on’ time until the backlight brightness has reduced to 50% of its original output level.
Continuity of supply
Equipment lifetimes of well in excess of 10-years are not uncommon for industrial systems and products. Design and development cycles, product introduction and market acceptance of new products can be long and protracted. Ensuring continuity of supply is essential for display modules used in all high reliability applications.
Undertaking a system re-design due to the discontinuation of a display module during the mid-life of a product is a costly, resource consuming exercise and should, where possible, be avoided. A profi cient, established display supplier will be able to discuss their product supply policy, end-of-life (EOL) provision and offer a commitment to source and supply a directly compatible equivalent if necessary.
A stable display technology Alternative display technologies continue to deceive expectation with lifetime issues, poor yield rates and excessive costs. TFT display modules continue to demonstrate the continued viability of a mature display technology with an established production process and consistent manufacturing yields. Manufacturing costs are relatively constant with few variables.
Although the specifi cations and interfaces of many TFT display modules are derived from displays used in the consumer OEM market, local display suppliers actively recognise the increasing relevance of offering display solutions that provide excellent optical performance, integrated ease-of-use features, and value-added enhancements in supporting a stable, long-term industrial marketplace. In this respect, TFT displays remain a compelling display solution for industrial and high reliability markets.
Review Display Systems
www.review-displays.co.uk
MARCH 2022 | ELECTRONICS TODAY 19
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46
