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AMOLED Displays

(Active-Matrix Organic Light Emitting Diode). 

Active-Matrix OLED Displays are named by the active drive construction for each pixel.  The pixels individually have seperate logic control and power control.  The pixel will be controlled off/on by the display controller IC, while the power is supplied directly to the pixels through the devices structure.  Active-Matrix design is a more complex structure and higher-cost than Passive-Matrix designs, but unlike Passive-Matrix designs the designs can be scalable to larger sizes and higher resolutions without scaling the power profile nor impact to the OLED material degradation.  These displays is suitble for stable industrial products that may seek similar look and feel to mobile phones, and high-end smart wearable devices.  AMOLED displays have small format offerings for select wearables, but generally focus on sizes larger than most PMOLED offerings .  


The conceptual technology behind OLED displays originates back into the 1950's and 1960's.  Original patents arrived in the mid 1970's and the first practical implementation in the late 1980's.  The original 'large molecule' technology was the first to debut in production from Eastman Kodak. Later in the 1990's 'small molecule' technologies reached the market from Pioneer, TDK, and Samsung.  The primary differences in the 'large' versus 'small' technologies is the manufacturing , patents, and other related processes.  

Practical Applications:

AMOLED Displays have a number of advantages.  The materials for making AMOLED require less overall materails than similar full-color TFT-LCD display.  Less materials provides the premise of lower material costs if equal demand and yield is acheived. Less materials also makes the displays thinner and lighter weight potentially than many simliar full-color TFT-LCD dispalys with backlights.   AMOLED displays are solid-state display technology, so the electrical, mechanical, and optical performance does not differ over fluctuation within the operating temperature range specified in the item.  The optical performance of AMOLED has deeper contrast ratio than TFTs by technology offfering a more true 'black' inactive state.  The optical performance is visually superior in most applications to TFT-LCD performance with OLED responding faster than liquid crystal.  

Limiting factors for AMOLED Technology include sunlight performance which is difficult for any emissive display to compete with high intensity sunlight.  The technology is suitable for some sunlight conditions, but under extensive sun it may be subjectively not compare well on this category.   Emissive displays that generate light will draw more power than some technologies that do not produce light at each pixel through a backlight, such as reflective displays that utilize ambient lighting.  AMOLED will not be able to be reflective in polarization, so compared to those technologies it will draw more power by comparision .  AMOLED can be optimized to illuminate less pixels of the display to draw less power, and brightness can be controlled to draw less power with lower brightness. The power is proportional to the number of illuminated pixels and the intensity they are driven.  On a color AMOLED offering, full "WHITE" emission will draw the most power with all red, green, and blue sub-pixels running at full intensity. Optimizing content for OLED technology can be highly effective to ensure superior power performance compared to liquid crystal dispaly technologies.   

Select AMOLED Displays are able to claim industrial availablity, but this may not be universal to all offerings.  Many industrial AMOLED offerings originate from display layouts from consumer designs that manufacturing has broad popularity outside of applicaiton specific designs.  Our factory supply team must review all of these items in depth to ensure that industrial support is able to be achieved for all materails. .  This allows some materails from a consumer wearable, to be offered to a more industrial wearable application..  Customizations of AMOLED are limited due to the supply chain. All industrial offerings  promoted share origin in key hardware that originated for meeting consumer demand that has transitioned to be promoted to industrial customers after being available and established.  Customization to the panel itself takes substantial tooling costs, minimum order and project requirements, and other limitations make customization heavily restricted to most industrial applications.  

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