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FI19992732A7 - Backlight light guide for flat panel display - Google Patents

Backlight light guide for flat panel display Download PDF

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Publication number
FI19992732A7
FI19992732A7 FI19992732A FI19992732A FI19992732A7 FI 19992732 A7 FI19992732 A7 FI 19992732A7 FI 19992732 A FI19992732 A FI 19992732A FI 19992732 A FI19992732 A FI 19992732A FI 19992732 A7 FI19992732 A7 FI 19992732A7
Authority
FI
Finland
Prior art keywords
light guide
patterns
flat panel
panel display
backlight light
Prior art date
Application number
FI19992732A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI19992732L (en
Inventor
Marko Parikka
Markku Kuittinen
Jari Turunen
Original Assignee
Nokia Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from FI982825A external-priority patent/FI106323B/en
Application filed by Nokia Corp filed Critical Nokia Corp
Priority to FI19992732A priority Critical patent/FI19992732A7/en
Publication of FI19992732L publication Critical patent/FI19992732L/en
Publication of FI19992732A7 publication Critical patent/FI19992732A7/en

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Abstract

Keksintö esittää uuden valojohtimen (313) litteän näytön (311) taustavalaistuksen (312) aikaansaamiseksi ainakin yhden valolähteen avulla siten, että valojohtimella on vähintään yksi pinta, joka käsittää kuvioita. Kuvioilla on diffraktio-ominaisuuksia valon ohjaamiseksi näytön suuntaan ja kuviot käsittävät yhtenäisiä, toisistaan eroavia alueita, joilla on valojohtimen pinnalla tietty jakauma. Valojohtimen lokaali uloskytkentäsuhde riippuu kuvioiden karakteristisista ominaisuuksista, jotka riippuvat etäisyydestä valolähteeseen tai sen aallonpituuteen. KuvaThe invention provides a new light guide (313) for providing backlighting (312) of a flat panel display (311) by means of at least one light source, in which the light guide has at least one surface comprising patterns. The patterns have diffraction properties for directing light towards the display and the patterns comprise uniform, distinct areas with a specific distribution on the surface of the light guide. The local turn-off ratio of the light guide depends on the characteristic properties of the patterns, which depend on the distance to the light source or its wavelength. Figure

FI19992732A 1998-12-30 1999-12-20 Backlight light guide for flat panel display FI19992732A7 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FI19992732A FI19992732A7 (en) 1998-12-30 1999-12-20 Backlight light guide for flat panel display

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI982825A FI106323B (en) 1998-12-30 1998-12-30 The backlight light guide for a flat screen
FI19992732A FI19992732A7 (en) 1998-12-30 1999-12-20 Backlight light guide for flat panel display

Publications (2)

Publication Number Publication Date
FI19992732L FI19992732L (en) 2000-06-30
FI19992732A7 true FI19992732A7 (en) 2000-07-01

Family

ID=26160681

Family Applications (1)

Application Number Title Priority Date Filing Date
FI19992732A FI19992732A7 (en) 1998-12-30 1999-12-20 Backlight light guide for flat panel display

Country Status (1)

Country Link
FI (1) FI19992732A7 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI106992B (en) 1999-05-28 2001-05-15 Ics Intelligent Control System A light indicator
FI107085B (en) 1999-05-28 2001-05-31 Ics Intelligent Control System Lighting panel

Also Published As

Publication number Publication date
FI19992732L (en) 2000-06-30

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