LTPS LCD

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LTPS LCD

(Low Temperature PolySilicon LCD) An active matrix LCD screen that is faster and more integrated than screens made with amorphous silicon substrates. Rather than the single-crystal silicon used in chips, amorphous silicon advanced the active matrix industry by allowing thin film transistors (TFTs) to be deposited on large substrates. There is a huge investment in existing amorphous technology; however, polysilicon provides an alternate approach for certain applications.

Faster, Denser, More Integrated
The larger and more uniform grains of polysilicon (poly-Si) allow electrons to flow 100 times faster than they do through the random-sized grains of amorphous silicon (a-Si), enabling higher resolutions and higher speed. In addition, instead of surrounding the screen area, the row/column driver electronics are integrated onto the glass substrate, thereby reducing the TFT section and the wiring between the pixels. Thus, LTPS LCD pixels can be closer together and achieve densities of 200 dpi and greater. See LCD and polysilicon.
References in periodicals archive ?
But TRI said that the definition LTPS TFT LCD panels varies proportionally with needed power to drive backlights in handsets, a relationship that is politically-incorrect in this age of eco-awareness and would work against promotions in markets with high proportions of consumers whose buying decisions are actually influenced by the green movement than fad.
Optimization resulting from high transmissivity of LTPS TFT LCD technology achieves a high luminance of 250cd/m2, a high contrast ratio of 400:1 and a wide color gamut of 70%, despite super-high density of 229 ppi.
Estimated Shipments of Small and Medium-sized Display Panels, by Category Unit: 1 million units Period LTPS TFT LCD a-Si TFT LCD CSTN LCD MSTN LCD AMOLED Q1, 2010 69 234 66 18 6 Q2, 2010 78 252 66 18 6 Q3, 2010 102 264 48 18 12 Q4, 2010 96 252 48 12 18 Q1, 2011 96 228 36 12 18 Q2, 2011 102 300 36 6 24 Q3, 2011 108 300 24 12 36 Q4, 2011 108 280 24 12 42 Q1, 2012 110 300 15 12 42 Q2, 2012 120 310 13 10 42 Q3, 2012 150 320 10 10 54 Q4, 2012 140 320 10 10 54 Source: Topology Research Institute
0-inch WVGA (800 x 480) LTPS TFT LCD module will be demonstrated, featuring five times the number of pixels as available in the common QVGA format, with a pixel density of 313 pixels per inch to support greater information content and superior image quality for web and mapping applications.
1H 2004 quarterly review of panel shipment volume, value, ASP; panels for mobile phone, DSC/DVC, automotive display, PDA, and other applications such as portable VCD/DVD players, multimedia devices, and industrial, office, and medical equipment; panels technology shipment review for TN/MSTN LCD, CSTN LCD, a-Si TFT LCD, LTPS TFT LCD, and OLED; shipment review of panel sizes.
Although LTPS TFT LCD spending accounted for at least a 30% share of total array equipment spending in 2001 and more than 40% in 2002, moving forward, DisplaySearch believes investment in LTPS will be much lower as manufacturers focus on large area a-Si applications for monitors and televisions.
Although the overall market is down, there are a number of bright spots in 2001 such as LTPS TFT LCD revenues rising 56%, PDPs rising 125% and OLEDs jumping 119%.
Development Status: Roadmaps from microdisplays and a-Si and LTPS TFT LCD producers.
The glass substrate in LTPS TFT LCD technology supports much faster electron flow than the non-crystallized substrate used in mainstream amorphous-silicon TFT LCDs.
4-inch SVGA TFT LCD allows Toshiba to strengthen its position as the world's dominant LTPS TFT LCD technology leader by extending its reach into industrial markets.