Active-matrix liquid-crystal display
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An active-matrix liquid-crystal display (AMLCD) is a type of
LCD screen, due to low weight, very good image quality, wide color gamut
and fast response time.
The concept of
RCA Laboratories in 1968.[1] The first functional AMLCD with thin-film transistors was made by T. Peter Brody, Fang-Chen Luo and their team at Westinghouse Electric Corporation in 1972.[2][3]
However, it took years of additional research and development by others to launch successful products.
Introduction
The most common type of AMLCD contains, besides the polarizing sheets and cells of liquid crystal, a matrix of thin-film transistors to make a
passive matrix
of the same size. An important specification for these displays is their viewing-angle.
Thin-film transistors are usually used for constructing an active matrix so that the two terms are often interchanged, even though a thin-film transistor is just one component in an active matrix and some active-matrix designs have used other components such as
sample-and-hold
circuit.
See also
References
- ^ "IEEE Jun-ichi Nishizawa Medal". Institute of Electrical and Electronics Engineers (IEEE). Archived from the original on 2013-09-12. Retrieved 2013-11-01.
- ^ "Liquid crystal image display panel with integrated addressing circuitry". Google Patents. 1972-10-10.
- S2CID 1378753.
- ^ "History of TFT LCD". Archived from the original on 2013-08-23. Retrieved 2011-02-22.
There are many kinds of AMLCD. For their integrated switching devices most use transistors made of deposited thin films, which are therefore called thin-film transistors (TFTs).