Liquid-crystal display using uv light source
Номер патента: EP1040382A1
Опубликовано: 04-10-2000
Автор(ы): Anne Christine Newport, Aron Vecht, Paul Andrew Bayley
Принадлежит: UK Secretary of State for Defence
Опубликовано: 04-10-2000
Автор(ы): Anne Christine Newport, Aron Vecht, Paul Andrew Bayley
Принадлежит: UK Secretary of State for Defence
Реферат: A particularly useful form of light source is disclosed for UV/phosphor-type liquid-crystal displays. The source is a discharge lamp (1) lined with a first phosphor (3) that emits UVA light (5) which is then modulated by a liquid-crystal device (9) before reaching a second phosphor (11) acting as a display surface and emitting visible light when excited by the modulated narrow-band UVA light. To provide the narrow bandwidth the first phosphor is preferably Eu2+-doped CaSO¿4?. The CaSO4:Eu?2+¿ phosphor is prepared by heating a mixture of CaSO¿4?, (NH4)2SO4 and EU2O3 in an inert atmosphere, cooling the resultant mixture, adding a reducing agent, in particular NH4Cl, heating again in an inert atmosphere and grinding or otherwise processing to the required particle size.
Liquid crystal display panel, display device, and manufacturing method of liquid crystal display panel
Номер патента: US09703141B2. Автор: Xue Dong,Ruijun Dong,Haiwei Sun. Владелец: Beijing BOE Optoelectronics Technology Co Ltd. Дата публикации: 2017-07-11.