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 ?
"Apple has long been speculated that it will launch an AMOLED version of its new iPhone in September along with two other LTPS TFT LCD models," industry sources said.
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.
A combination of high transmissivity of LTPS TFT LCD technology and NEC LCD Technologies' own unique super-reflective natural light TFT (SR-NLT) technology achieves high luminance of 200cd/m2 and a high reflective ratio of 15%, despite a super-high density of 229 ppi.
Optimization based on high transmissivity of LTPS TFT LCD technology achieves high luminance of 200cd/m2, a high contrast ratio of 400:1 and a wide color gamut of 70%, despite ultra-high density of 302ppi.
A combination of high transmissivity of LTPS TFT LCD technology and NEC LCD Technologies' own unique super-reflective natural light TFT (SR-NLT) technology achieves high luminance of 180cd/m2 and a high reflective ratio of 15%, despite ultra-high density of 302ppi.
Leadis supplies display drivers supporting the major small panel display technologies, including a-Si and LTPS TFT LCD's, color STN LCD's, and color OLED displays.
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
Shipment Share of Cellphone Main Display by Technology Sum of / Unit Share (%) 2009 Q1 '10 a-Si TFT LCD 52.3% 59.2% CSTN 20.3% 15.3% LTPS TFT LCD 20.4% 17.6% AMOLED 1.4% 1.9% MSTN 5.6% 6% PMOLED 0.1% 0% Source: Display Search Quarterly Mobile Phone Shipment and Forecast Report
Founded in 2001, AFPD is a joint venture between Toshiba Corporation and Matsushita Electric Industrial Co., Ltd., specializing in the manufacture of LTPS TFT LCDs with excellent mass production and related technologies as its intelligence properties.