LCD

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Related to nematic: smectic, cholesteric

LCD

(electronics)

LCD

LCD

(Liquid Crystal Display) A screen display technology developed in 1963 at the David Sarnoff Research Center in Princeton, NJ. How LCDs work is quite amazing. Sandwiched between polarizing filters and glass panels, rod-shaped molecules of liquid crystals flow like water and bend light like crystal. The overwhelming majority of TVs and computer screens are LCD (see LED TV). Mobile devices are also LCD but are switching to organic LED (OLED), which is increasingly becoming mainstream (see OLED). See liquid crystal.


Seven-Segment LCD Watch
Because it took so little power to move crystal molecules, LCD wristwatches and other monochrome LCD displays began to flourish in the late 1970s. By the 1990s, color LCDs helped laptop sales boom, and LCD computer monitors outsold CRTs for the first time in 2003. (Image courtesy of the private collection of Peter Wenzig.)


Twisting and Straightening
The center segment of the "8" in the seven-segment display above shows how liquid crystal molecules twist to let light flow through (image courtesy of LXD, Inc.). Seven-segment displays are the simplest LCDs. All video screens use pixels made up of three LCD subpixels with light shining through color filters. For example, in a 4K TV set, there are 24 million subpixel segments. For a more in-depth explanation, see LCD example and LCD subpixels.

Reflective Vs. Backlit
In low-cost calculators and readouts, a reflector bounces ambient light back to the viewer (bottom of illustration). However, reflective displays may be unreadable in dim light. With backlit LCDs, a light below the reflector beams toward the viewer for a bright screen indoors (see transmissive LCD). Passive displays may be reflective or backlit, but active matrix TV and computer screens are always backlit (see LCD types and LED TV). See flat panel display, LCD vs. plasma, LCoS and indium.


Seven-Segment LCD Watch
Because it took so little power to move crystal molecules, LCD wristwatches and other monochrome LCD displays began to flourish in the late 1970s. By the 1990s, color LCDs helped laptop sales boom, and LCD computer monitors outsold CRTs for the first time in 2003. (Image courtesy of the private collection of Peter Wenzig.)







LCD Vs. LED
LCDs and LEDs are widely used in combination as in this printer panel. Readouts are LCDs, but the indicator lights on billions of products are LEDs. LCD TVs use LED backlights (see LED and LED TV).
References in periodicals archive ?
On the other hand, for the development of hybrid PE-b-PEO/ EBBA fibers, block copolymer solution flowed through the inner needle of the equipment and a solution of 5 wt% of EBBA nematic liquid crystal in chloroform through the outer one.
Figure 1(a) shows the schematic of a dual core PCF, where the holes with diameter d and pitch [LAMBDA] placed in the cladding region are infiltrated with E7 type nematic LC instead of air.
This paper investigates the effect of presence of the twisted nematic liquid crystal in the emulsion of mineral oil on uncoated carbide lathe tool performance when turning C45 steel at conventional cooling conditions.
Specific subjects in this area might include: Nematic ordered cellulose and varying levels of structure in the cellulosic phase, and the effect of structural modification on the physical chemistry of the cell wall during biosynthesis.
University of Akron, Department of Polymer Engineering, seminar on "Dielectric anisotropy of nematic binary mixtures," Polymer Engineering Academic Center, Akron, OH, Thein Kyu (330) 972-6672--December 3.
Coined the nematic gel, the scientists were able to align the tubes by embedding and compressing them in a cross-linked polymer matrix whose volume is highly temperature dependent.
It said it was the first company to commercialize single-chip display drivers for full-color organic light-emitting diodes, or OLEDs, and its product portfolio includes color super-twisted nematic liquid crystal display and passive matrix OLED display drivers.
Once mass production starts, monthly output will be targeted at 75,000 thin film-transistor (TFT) LCDs and one million supertwist nematic (STN) LCDS, Hitachi said.
Optrex Corp, a liquid crystal display (LCD) module manufacturer, has partnered with two semiconductor companies - Samsung Electronics Corp and Toshiba Corp - to jointly develop driver LSIs for colour super twisted nematic (STN) LCDs for mobile products, particularly next-generation cellular phones.