Light concentrating module capable of reducing bending, and backlight unit comprising same
US10302843B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 2016 |
| Grant date | May 28, 2019 |
| Priority date | — |
| Expiry date | Jun 23, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2201/54
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided is a light concentrating module capable of reducing bending, comprising: a reflective polarization sheet layered with a plurality of stacks having different refractive indexes, so as to selectively transmit light, and having both sides of which the contraction rates are different; and a first light concentrating sheet having a first structural pattern in which first unit light concentrating bodies, of which cross-sectional areas gradually decrease towards an upper part thereof, are successively repeated, wherein the first unit light concentrating bodies are attached to one surface of the reflective polarization sheet, thereby reducing the contracting and bending of the reflective polarization sheet according to a rise in the temperature, caused by a difference between the contraction rate of the first light concentrating sheet and the contraction rate of one surface of the reflective polarization sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.