ALERT

Cisco CloudCenter: Get the Hybrid IT Advantage

Backlight

Definition - What does Backlight mean?

Backlight is a category of illumination used in monitors utilizing liquid crystal display (LCD) technology. Liquid crystal display monitors cannot produce light by themselves, and must depend on light sources to provide visible images. Apart from being used in computer displays, LCD televisions and smartphones, backlights are also used in small displays such as wristwatches and pocket calculators for improving the readability in low-light conditions.

Techopedia explains Backlight

Unlike front lights which illuminate from the front, backlights usually produce illumination from the sides or from the back of the screen. Most liquid crystal display screens consist of several layers, with backlight being the layer farthest back. The light valves help in changing the amount of light reaching the human eyes, usually by blocking light's passage with the help of a polarizing filter.

There are five main categories of light sources used for backlights:

  • Light-emitting diodes
  • Hot cathode fluorescent lamps
  • Cold cathode fluorescent lamps
  • Incandescent light bulbs
  • Electroluminescent panels

Among these, only electroluminescent panels are capable of providing uniform light across the entire surface. For other light sources, a diffuser needs to be used for providing uniform light. White backlighting is much more predominant than colored backlighting.

Backlights help in achieving thinner, lighter and more efficient displays. LCD screens making use of backlighting have a longer lifespan compared to existing monitor technologies, including OLED. However, compared to devices such as ones based on OLED technology, displays making use of backlight consume more power.

Share this:

Connect with us

Email Newsletter

Join thousands of others with our weekly newsletter

Resources
The 4th Era of IT Infrastructure: Superconverged Systems
The 4th Era of IT Infrastructure: Superconverged Systems:
Learn the benefits and limitations of the 3 generations of IT infrastructure – siloed, converged and hyperconverged – and discover how the 4th...
Approaches and Benefits of Network Virtualization
Approaches and Benefits of Network Virtualization:
Businesses today aspire to achieve a software-defined datacenter (SDDC) to enhance business agility and reduce operational complexity. However, the...
Free E-Book: Public Cloud Guide
Free E-Book: Public Cloud Guide:
This white paper is for leaders of Operations, Engineering, or Infrastructure teams who are creating or executing an IT roadmap.
Free Tool: Virtual Health Monitor
Free Tool: Virtual Health Monitor:
Virtual Health Monitor is a free virtualization monitoring and reporting tool for VMware, Hyper-V, RHEV, and XenServer environments.
Free 30 Day Trial – Turbonomic
Free 30 Day Trial – Turbonomic:
Turbonomic delivers an autonomic platform where virtual and cloud environments self-manage in real-time to assure application performance.