77: Moody Blues
This episode covers the 1960s history of RCA's work on liquid crystal displays, their version of a TV screen one can hang on a wall. We begin with Richard Williams in 1962, who discovered that liquid crystals get a "crinkled" look under a microscope when you apply voltage. George Heilmeier then discovered a guest-host effect with liquid crystals, and even more, found dynamic scattering. RCA showed off its display prototypes to big fanfare in 1968. James Fergason, an independent researcher, patented a way to show temperature with liquid crystal colors, then invented the twisted-nematic field-effect liquid-crystal display in 1968. With Fergason's method, by the 1970s, LCD watches and calculators were being mass-produced. Finally, in 1977, Sivaramakrishna Chandrasekhar discovers a new type of liquid crystal: columnal liquid crystals.
- Support my podcast at https://www.patreon.com/thehistoryofchemistry
- Tell me how your life relates to chemistry! E-mail me at steve@historyofchem.com
- Get my book, O Mg! How Chemistry Came to Be, from World Scientific Publishing, https://www.worldscientific.com/worldscibooks/10.1142/12670#t=aboutBook
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This episode covers the 1960s history of RCA's work on liquid crystal displays, their version of a TV screen one can hang on a wall. We begin with Richard Williams in 1962, who discovered that liquid crystals get a "crinkled" look under a microscope when you apply voltage. George Heilmeier then discovered a guest-host effect with liquid crystals, and even more, found dynamic scattering. RCA showed off its display prototypes to big fanfare in 1968. James Fergason, an independent researcher, patented a way to show temperature with liquid crystal colors, then invented the twisted-nematic field-effect liquid-crystal display in 1968. With Fergason's method, by the 1970s, LCD watches and calculators were being mass-produced. Finally, in 1977, Sivaramakrishna Chandrasekhar discovers a new type of liquid crystal: columnal liquid crystals.
- Support my podcast at https://www.patreon.com/thehistoryofchemistry
- Tell me how your life relates to chemistry! E-mail me at steve@historyofchem.com
- Get my book, O Mg! How Chemistry Came to Be, from World Scientific Publishing, https://www.worldscientific.com/worldscibooks/10.1142/12670#t=aboutBook
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