Nova Patents
EP1521235A3

Liquid crystal display backlight with a two-dimensional array of light emitting diodes

Abstract

One embodiment of the invention provides a backlight (26) for an LCD panel (14). The backlight (26) uses a two-dimensional array of single color or white LEDs (24) and a cover plate (40), e.g. a diffuser (28) or a cover plate (40) coated with a phosphor layer (39). Various electrical connections of the LEDs (24), various phosphor color-conversion techniques and light sensors (34) placed to measure the luminance uniformity over the backlight (26) are described.

Term

Term ended

Projected expiry passed 1 October 2024, 2 years ago.

  1. Priority
  2. Filed
  3. Published
  4. Projected expiry
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Every citation, both ways

Citations
DocumentRelationOfficeCategoryCited duringRelevant claims
WO0065880A1CitesWorld Intellectual Property Organization (WIPO)YSearch report14-16,19,20
EP1152642A2CitesEuropean Patent Office (EPO)YSearch report20-22
EP1229377A2CitesEuropean Patent Office (EPO)YSearch report13
EP1256835A2CitesEuropean Patent Office (EPO)YSearch report8,9,11,28,29
US2002008841A1CitesUnited States of AmericaYSearch report6,7,28
US2002145041A1CitesUnited States of AmericaYSearch report19-22
US2002158583A1CitesUnited States of AmericaYSearch report20
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US2003042845A1CitesUnited States of AmericaYSearch report12
US2003043107A1CitesUnited States of AmericaYSearch report19-22
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US2003090455A1CitesUnited States of AmericaXAYSearch report1-3,5,8-10,17,18,30-32
US2003164904A1CitesUnited States of AmericaYSearch report12
GB2311643ACitesUnited KingdomXAYSearch report1-3,5-9,17,18,28-32
US4907862ACitesUnited States of AmericaXYSearch report1-3,5,17,18,30-32
US5132825ACitesUnited States of AmericaYSearch report22
US5410345ACitesUnited States of AmericaXYSearch report1-7,17,18,30-32
US5661645ACitesUnited States of AmericaYSearch report14-16,19
US5783909ACitesUnited States of AmericaYSearch report14-16,19-22
US6521879B1CitesUnited States of AmericaYSearch report19-22