Backlight unit comprising condensing film having hetero-conic lenses
US8870399B2 · kind B2 · utility
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17Claims
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Key dates
| Filing date | Dec 8, 2011 |
| Grant date | Oct 28, 2014 |
| Priority date | — |
| Expiry date | Feb 6, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133611
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Provided is a backlight unit. The backlight unit includes a light source, an optical member configured to uniformly distribute light emitted from the light source, and at least two condensing films configured to condense light from the optical member. Hetero-conic lenses are two-dimensionally arranged on a surface of each of the condensing films, and each of the hetero-conic lenses is formed by combining a first conic lens expressed by Formula (1) below and a second conic lens expressed by Formula (2) below:
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.