imotion by infinitus d.o.o.

TECHNOLOGY

Outdoor LCD enclosure market is quite confusing with many suppliers offering solutions of much different quality to system integrators and end customers. It is important to better understand requirements of electronics to be able to differentiate between options and evade danger of wasting resources.

 

VIEW THEME

CONTROLMOTION DIAGNOSTIC TOOL WITH REFRESHED GUI

EXPLAINING OEM LCD OPERATIONAL TEMPERATURE RANGES AND ITS EFFECT ON EXTERNAL SIGNS

TEMPERATURE EFFECT ON LCD BRIGHTNESS LIFE TIME AND POWER CONSUMPTION

BASIC DIFFERENCES BETWEEN LCD DIGITAL SIGNAGE DISPLAYS

LUMINANCE LCD OUTPUT DEPENDENCE ON INNER OUTDOOR ENCLOSURE TEMPERATURES

LCD ON-SURFACE TEMPERATURES AND OPERATION RANGE

UNDERSTANDING VISIBILITY AND RETHINKING TECHNICAL SPECIFICATIONS

3 CORNERSTONES OF UNIQUE OUTDOOR LCD IMOTION G6 TECHNOLOGY


 

EXPLAINING OEM LCD OPERATIONAL TEMPERATURE RANGES AND ITS EFFECT ON EXTERNAL SIGNS

LCD panel, as any other electronics device, is influenced by temperature of environment they operate within. Exposing OEM LCD temperature ranges helps us to understand and differentiate quality of outdoor LCD digital signs. Their purpose is to sustain at least warranted environment and in best case to deliver optimal (tech specs) luminance output.
 
 
LCD operation temperature ranges

Most of manufacturers are specifying same temperature ranges. Initial testing temperature that tech specs are based on are "room temperature" at 25±2˚C. Normal operation temperature is considered between 10 ˚C and 40 ˚C. Warranted operation limits are between 0 ˚C and 50 ˚C. Anything out of these boundaries will influence on sub-performance and eventually cause permanent damage.
 
  • 25±2˚C - This is temperature where luminance output is same as specified in tech specs. In most systems this is impossible to reach, unless powerful cooling system is used (e.g. imotionG6 technology)
  • 10 - 40 ˚C - Normal operation range presents minimal drop in brightness performance output and this is healthy temperature range
  • 0 - 50 ˚C - Warranted operation range is maximal range of inner enclosure temperatures for decent external LCD digital signs.
 
CCFL and LED backlight luminance output
CCFL and LED backlight luminance output


LCD technology utilizes backlight to operate. Usual sources are CCFL or LED based, with LED option becoming main stream for a while now. Both of light sources react to temperatures differently. CCFL prefers temperatures around 20 ˚C, while LED light operates better as temperature drops. Basically, it is possible to have higher than specified luminance output if cooling the enclosure enough.
 
How does it apply to differentiating outdoor LCD digital signs!?

Quality of external LCD digital signs depends heavily, not only on Integrated LCD panel, but also on thermal conditioning, that will either enable great operation or limit it to minimum. In addition higher temperatures will speed up component degradation and cause higher power consumption.
 
Good systems will work within warranted temperature conditions environment (imotionFLOW and imotionLITE), great LCD thermal management systems will work in either normal operating conditions or even optimal ones (imotionG6).



 
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