Sharp 24/7 Desktop Operational Guidelines - Page 2

NEC Operational Guidelines Helping prevent image retention on a LCD display LCDs can show image retention when static information is displayed for an extended period of time which is commonly called image retention. Image retention is not covered by warranty as the user can avoid image retention by taking certain measures. Please note: When showing the same static content for an extended period of time, showing a different content for a few seconds will not help reduce image retention. The best effects are achieved when different contents are shown for an equal period of time. Switching the displays off for a few hours per day also supports efforts to minimise image retention effectively. Be extra careful with modified screens When a protection sheet (glass, acrylic/touch screen) is installed over the LCD surface, or the desktop display is mounted in a wall or separate housing, take special care to ensure ambient temperature is within the monitor usage specification. Using an LCD display in areas with ambient temperatures above 35 degrees Celsius can reduce the time period in which image retention may occur. The monitor's ventilation holes must be free of dust and dirt in all locations. Power save or power off NEC recommends that the display enters the power saving mode, or is turned off, when not in use. Leaving the unit on - even with a blank screen - decreases the overall lifetime of the display. Turning off, or using power management, for 6-8 hours per day can considerably extend the life of the product and minimise image retention. F) Avoid vertical lines, borders or frames next to high contrast pictures. G) Avoid high contrast image patterns. High contrast patterns should not be positioned side by side in a static image. This type of pattern increases the risk of image retention due to the presence of charges in the LCD in adjacent areas. Displays operating under 24/7 conditions (or more than 7000 hours/year) are very likely to experience accelerated aging effects (e.g. staining, image retention, brightness non-uniformity), which cause visible deterioration of image quality. Consequently, NEC considers that displays which are operated as 24/7 (or more than 7000 hours/ year) and which have visible image deterioration are nonetheless still offering an acceptable performance within the expected ageing processes and will not be considered defective. Screen saver control for fixed images In those rare instances when static images over a long period of time cannot is avoided, NEC insists that the display's "Screen Saver" control is activated. This feature is selected via advanced OSD (On Screen Display) under "Screen Saver"/ "Motion" Tips for optimized content A) Keeping the operating temperature as close to room temperature as possible b) Avoiding high brightness levels which is closely related to a) c) Avoiding bright background color. d) Horizontal scrolling of characters/images at regular, periodic intervals. e) Movement of characters/images at periodic intervals. Applying movement to the screen content is one of the most effective ways of reducing image retention. This can easily be achieved by shifting the whole screen content, or just portions that are usually static. Not recommended: Black / White combinations of fonts and sharp borders with rapid changes Recommended: Characters scrolling in horizontal direction / logo in vertical direction Recommended: Insert moving pictures between fixed images Sharp NEC Display Solutions of America www.sharpnecdisplays.us ©2022 Sharp NEC Display Solutions of America, Inc. | All rights reserved. All other brand or product names are trademarks or registered trademarks of their respective holders.