Image Sticking In Lcd Tv Sets
- Date: 2007-05-08 - Word Count: 533
Share This!
Image Retention - Isn't it just an issue with Plasma TVs?
What is Image Sticking?
Many are aware that if you leave a static image for a prolonged period on a plasma TV, you may risk phosphor burn-in. The result is that once you remove the static image, you would still be able to see a faint outline, or ghosting of the original image, even when you change the picture content.
LCD TVs do not suffer from burn-in, yet as surprising as it may seem, they still suffer from image retention when a static or semi-static image is left displayed on the screen for too long.
The intensity of image retention depends on various factors, not just the duration the static image remains displayed on the screen. Issues such as image makeup, operating temperature, and the LCD panel brand itself, should also be factored in.
Image retention in LCD panels is often referred in the LCD industry as 'image sticking'. As with burn-in, image sticking is a phenomenon where a faint outline of a previously displayed fixed or semi-fixed image remains visible on the screen even when the image is changed.
It should be remarked that though burn-in in plasma televisions and image sticking in LCD display panels both result in image retention or ghosting on the display panel, yet burn-in and image sticking are two different phenomena.
What Causes Image Sticking in TFT LCD Displays?
Image sticking is an intrinsic behavior of TFT LCD panels. It is the result of their susceptibility to polarization of the liquid crystals inside the display panel when a static image remains displayed on the screen for too long. How long - depends.
This results in a parasitic charge build-up, or polarization, within individual pixels and sub-pixels. This polarization takes place at the liquid crystal level in the LCD panel; it affects the crystals' optical properties as it prevents the liquid crystals to return fully to their normal 'relaxed' state upon deactivation.
Manufacturers' Warranties against Image-sticking
Generally, manufactures do not warrant an LCD display device against the occurrence of image retention.
Like burn-in in phosphor-based displays, image sticking is considered by manufactures as a phenomenon that is inherent to the respective display technology. Furthermore, its occurrence is tied up to end-use and as such, the possibility of image retention is end-user dependent.
Putting things in their Right Perspective
Surely, working with a retained image in the background is to say the least, extremely annoying. Besides, as expressed earlier on, except for the few, manufactures' warranties would not generally cover image-sticking issues with LCD panels.
However, to put this whole discussion in the right perspective, it is important to keep in mind that the need to display a static image for more than a few minutes in home entertainment is generally non-existent.
Further more, while the best approach is to take the necessary steps to avoid image sticking in the first place, yet image sticking in LCD panels can often be reversed to a point of total invisibility.
To find out more on image sticking in LCD displays, including ways to reverse it and how best to avoid it, read the full article appearing on Practical Home Theater Guide at under the LCD TV section of the site; for contact details, see below.
What is Image Sticking?
Many are aware that if you leave a static image for a prolonged period on a plasma TV, you may risk phosphor burn-in. The result is that once you remove the static image, you would still be able to see a faint outline, or ghosting of the original image, even when you change the picture content.
LCD TVs do not suffer from burn-in, yet as surprising as it may seem, they still suffer from image retention when a static or semi-static image is left displayed on the screen for too long.
The intensity of image retention depends on various factors, not just the duration the static image remains displayed on the screen. Issues such as image makeup, operating temperature, and the LCD panel brand itself, should also be factored in.
Image retention in LCD panels is often referred in the LCD industry as 'image sticking'. As with burn-in, image sticking is a phenomenon where a faint outline of a previously displayed fixed or semi-fixed image remains visible on the screen even when the image is changed.
It should be remarked that though burn-in in plasma televisions and image sticking in LCD display panels both result in image retention or ghosting on the display panel, yet burn-in and image sticking are two different phenomena.
What Causes Image Sticking in TFT LCD Displays?
Image sticking is an intrinsic behavior of TFT LCD panels. It is the result of their susceptibility to polarization of the liquid crystals inside the display panel when a static image remains displayed on the screen for too long. How long - depends.
This results in a parasitic charge build-up, or polarization, within individual pixels and sub-pixels. This polarization takes place at the liquid crystal level in the LCD panel; it affects the crystals' optical properties as it prevents the liquid crystals to return fully to their normal 'relaxed' state upon deactivation.
Manufacturers' Warranties against Image-sticking
Generally, manufactures do not warrant an LCD display device against the occurrence of image retention.
Like burn-in in phosphor-based displays, image sticking is considered by manufactures as a phenomenon that is inherent to the respective display technology. Furthermore, its occurrence is tied up to end-use and as such, the possibility of image retention is end-user dependent.
Putting things in their Right Perspective
Surely, working with a retained image in the background is to say the least, extremely annoying. Besides, as expressed earlier on, except for the few, manufactures' warranties would not generally cover image-sticking issues with LCD panels.
However, to put this whole discussion in the right perspective, it is important to keep in mind that the need to display a static image for more than a few minutes in home entertainment is generally non-existent.
Further more, while the best approach is to take the necessary steps to avoid image sticking in the first place, yet image sticking in LCD panels can often be reversed to a point of total invisibility.
To find out more on image sticking in LCD displays, including ways to reverse it and how best to avoid it, read the full article appearing on Practical Home Theater Guide at under the LCD TV section of the site; for contact details, see below.
Related Tags: lcd tv, image sticking, image retention, ghosting, lcd pixel retained charge, burn-in, lcd displays
Andrew Ghigo: Editor & Publisher of Practical Home Theater Guide [www.practical-home-theater-guide.com]
This article is an excerpt from a series of guides appearing under the LCD TV section of the site at www.practical-home-theater-guide.com/LCD-Tv.html.(c) 2004/2007 www.practical-home-theater-guide.com. All rights reserved. Your Article Search Directory : Find in Articles
Recent articles in this category:
- Understanding Cisco Sfp Optical Transceivers
The word SFP is an IT industry term which stands for Small Form Factor Pluggable. An SFP is a variet - Sharing The Internet Connection
If you are connecting two or more of your computers with each other over the network, then it is eas - Connecting The New Computer To My Server
The server is the computer that will handle the requests for applications, data and also other netwo - Networks
What is a network and its types ?The generic term " network "defines a set of entities (objects, peo - Ssl Certificates Are In Use Today Not All Valid
Qualys, a security research firm tries to paint a detailed portrait of SSL deployments and gaps with - A Mail Forwarding Usa - A Gift To Global Trade Links
Technologies have evolved very much over the past few decades. Globalization has enabled the world t - Benefits Of Wan Optimization Appliances/devices
In today's globally competitive market, corporate organizations both big and small adopt strategic m - Proper Network Cable Management And How It Can Save Your Business Time And Money
In many businesses now there are plenty of computers which will likely be attached to some sort of s - Dedicated Hosting In India For Web Servers
Dedicated web server hosting in India for complete control over your dedicated server is provided by - Outsourcing: The Future Of Network Management India
Computer Networking is a dynamic area and few strategies that were not thinkable yesterday can becom
Most viewed articles in this category:
- Used Foundry Networks: Used IT Gear Goes Mainstream
San Francisco, CA April 10, 2006Ask any IT manager what they think about used data networking gear a - CCNP Certification / BCMSN Exam Tutorial: Server Load Balancing (SLB)
When you're working on your BCMSN exam on your way to CCNP certification, you'll read at length abou - CCNP Certification / BSCI Exam Tutorial: The BGP Neighbor Process
Like TCP, BGP is connection-oriented. An underlying connection between two BGP speakers is est - CCNA / MCSE / CCNP Certification: Making Failure Work For You
Whether you're on the road to the CCNA, CCNP, MCSE, or you're on any other computer certification tr - Cisco CCNP / BSCI Exam Tutorial: OSPF Route Redistribution Review
OSPF route redistribution is an important topic on the BSCI exam, and it's a topic full of details a - Cisco CCNP / BSCI Exam Tutorial: 10 ISIS Details You Must Know!
Earning your CCNP certification and passing the BSCI exam depends on knowing the details of many Cis - Cisco CCNA / CCNP / BCMSN Exam Review: Trunking And Trunking Protocols
To earn your CCNA or CCNP certification, you've got to understand the basics of trunking. This - Cisco CCNA / CCNP Certification Exam Tutorial: ISDN And Multilink PPP
ISDN is a huge topic on both your Cisco CCNA and BCRAN CCNP exams. While many ISDN topics seem - Cisco CCNA / CCNP Certification Exam Tutorial: Floating Static Routes
To pass the Cisco CCNA and CCNP certification exams, as well as becoming a world-class networker, yo - Used foundry networks hardware remains in high demand
San Francisco, CA May 22, 2006: In recent years, the trend towards used networking hardware has cont