Glossary: J, K, L; Laptop & Laptop LCD Screen Industry Definitions
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ScreenTek is proud to provide you this glossary of common terms in the laptop LCD screen industry, and in the laptop notebook industry. Feel free to become more familiar with the terms we use throughout our site. If you notice any glaring omissions, we'd be glad to hear about those. Drop us a line at sales@screentekinc.com.
 Lambertian distribution
A sum of reflections in all directions. When a surface is composed of numerous surfaces, such as a polarizer, the overall observed reflection becomes the sum of the individual reflection. This is characterized by a distribution known as the Lambertian distribution. In the image at right, the green lines represent the incoming light and the blue lines the reflected light. Taken in aggregate, the blue lines make up the lambertian distribution of light reflected from the surface.
(more Optics terms)
LC Cell Gap
This work presents a transflective liquid-crystal (LC) display with a single cell gap in a dual-alignment configuration. This dual structure was fabricated via single-step laser-light exposure through a photomask. The vertical alignment induced by nanoparticles of polyhedral oligomeric silsesquioxanes can be changed into a homogeneous alignment via absorption of photoexcited azo dye. The LC molecules at the transmissive and reflective pixels are homogeneous and hybrid alignment, respectively, at which optimal phase retardations of half and quarter wavelengths are achieved.
(more terms)
LC Filling
This module fills empty cells with liquid crystal material. Several different modules are available dependent on cell size and volume/batch size requirements. Combined models with integrated pre-bake before filling is also available. Once again, by innovation in combining processes we have developed combination fill modules with integrated pre-bake chambers. These combination fill modules significantly reduce fill process cycle time while improving process yields. The FI-230-X2 preheats the empty cells in a separate chamber and then automatically transfers them into the fill chamber where the filling takes place. This process avoids heating the temperature sensitive LC material and eliminates environmental contamination between processes. Basically, the module consists of two vacuum chambers with a transfer door in between, which reduces cycle time by the heating of the cells during the filling and the pre-heating to remove moisture. The filling process is made without a conventional wick, which makes the process clean and reduce the waste of LC-material. Easy access to the cassettes and the filling bath from the top of the machine.
(more terms)
LC Pixel Capacitance
LC pixel capacitance Clc, which changes with the director of liquid crystal molecules as a function of external applied voltage, has a most important impact on the pixel voltage error $B&$(B Vp and therefore on the electro-optics (E-O) characteristics of the LC pixel for an a-Si TFT LCD. In this paper, the pixel voltage error has been simulated for 10.4" VGA (640$B!_(B480) and SVGA (800$B!_(B600) a-Si TFT LCD, and in this simulation, we especially took into account the change in LC dielectric constant. We found that $B&$(B Vp changes with the data voltage Vp. In addition, E-O characteristics of LC pixel for an a-Si TFT LCD has been investigated. The result shows that the effect of $B&$(B Vp on E-O characteristics is significant when Vp ranges from the threshold voltage to the saturation voltage
(more terms)
Light-emitting diodes (LED)
A semiconductor device which displays a narrow spectrum of light when electrically biased in the forward direction. The life span if an LED is much longer than ordinary incandescent bulbs and don’t tend to get very hot.
(more Hardware terms)
Liquid crystal
An organic liquid whose physical properties resemble those of a crystal in the formation of loosely ordered molecular arrays similar to a regular crystalline lattice and the anisotropic refraction of light
(more Hardware terms)
Liquid Crystal on Silicon (LCoS)
A reflective microdisplay that uses a silicon backplane with a frontplane similar to a transmissive LCD. Used mostly in rear-projection televisions and HMDs.
(more terms)
Low Temperature Poly-Silicon (LTPS)
A process for crystallizing amorphous silicon below the strain point of glass to create high-mobility silicon that can be used to integrate circuits directly onto the display substrate.
(more terms)
Low voltage differential signaling (LVD)
An electrical signaling system that can run at extremely high speeds through cheap, twisted copper wire.
(more Electronic terms)
Luminance
The quality of being luminous, either emitting or reflecting light.
(more Optics terms)
Luminance meter
Instrument for measuring the amount of light falling on or being reflected by a subject.
(more Optics terms)
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