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  • LCD

    Liquid Crystal Display - Traditionally recognised as a readout system 
    using normally non-illuminated reflective numerals or letters formed by 
    oblong magnetic molecules which line-up when electricity passes 
    through them. 
    Commonly found in watches, calculators, dials and a multitude of 
    displays for domestic and commercial use.

    Now the most common type of TV system.

  • LVDS

    Low Voltage Differential Signaling -digital display interface, it has 
    features in high potency, high speed and low power consumption.

  • Laser Anneal

    In the LPTS PROCESS, a-Si layer is crystallized to become poly-Si. 
    In view of the necessity to form polysilicon transistors on the substrate, 
    in the fabrication process, LTPS has to take advantage of laser energy 
    to convert amorphous silicon to polysilicon - it is called Laser Anneal 
    process. 

  • LED

    Light Emitting Diode - (LED) is a semiconductor device that emits light 
    when an electric current is passed through it.
    A two electrode 
    semiconductor device capable of producing efficient illumination. 
    Commonly seen on switches though continually developed for many 
    other applications. As an example, owing to their efficiency and reliability, 
    LEDs are now being utilised to illuminate LCD panels to replace the less 
    efficient and less reliable flourescent discharge lighting tubes.

  • Lines of Resolution

    Measure of screen or TV picture sharpness. The more lines, the sharper 
    the image.

  • LSI

    Large Scale Integrated circuit - A very small electronic circuit consisting 
    of a large assembly of elements made from a chip of semi-conducting 
    material.

  • Lumen (Lumina)

    Unit reference sometimes used in specifications of camcorders, projectors 
    and other equipment where quality of radiating or reflective brightness is 
    paramount. Lumen is the derived SI unit of luminous flux.

  • Luminance

    Part of a picture signal (TV broadcast) that causes a picture receiver's 
    circuitry to vary light intensity from white to black with many shades of 
    grey in between.Luminance is the physical measure of brightness.

    A standard unit of LUMINANCE is candela per square metre [cd/m2]. 
    Referred to as Nits in the
    USA from the latin 'nitere' = 'to shine'. 
    Typical LUMINANCE values are: 
    600,000 cd/m2 - Solar disk at horizon; 
    120,000 cd/m2 - 60w Frosted bulb; 
    8,000 cd/m2 - Average Clear Sky;
     
    2,500 cd/m2 - Moon Surface; 
    2,000 cd/m2 - Average Cloudy Sky; 
    30 cd/m2 - Green electroluminescent source; 
    0.0004 cd/m2 - Darkest Sky. 
    Source: SCHORSCH

  • LTPS

    Low Temperature Polysilicon. Generally LTPS manufacturing 
    process will be achieved while the process temperature is under 600°C. 
    In addition, the LTPS process uses the technology of laser anneal, 
    which is the key difference vs. a-Si process.

    In contrast to a-Si, LTPS has the characteristic of faster electron 
    mobility, above 300 times of a-Si. That explains why each pixel of 
    LTPS has faster response comparing with a-Si, and the outlined 
    dimension smaller than a-Si. Here are some significant advantages 
    of p-Si over with a-Si as shown below:

     1. The feasibility of integrating the peripheral circuit of driving circuit 
         onto substrate.
     2. Faster TFT response, smaller dimension, less contact and 
         component .
     3. Simplified system design.
     4. Increasing panel reliability.
     5. High Aperture Ratio and Resolution

  • LNB

    Low Noise Block converter - Usually mounted at the focal point of a 
    satellite dish and used to amplify and convert the satellite signals 
    into frequencies then sent to the receiver.