Direct-type panel lamp with uniform light
US11231161B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 2021 |
| Grant date | Jan 25, 2022 |
| Priority date | — |
| Expiry date | Feb 9, 2041 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present application discloses a direct-type panel lamp with uniform light, including a frame, a diffusion plate, a back plate, a reflective sheet and at least one lamp strip. A central region of the back plate bulges to form a chamber for accommodating the lamp strip. The chamber includes a flat bottom wall and inclined side walls. Each lamp strip is fixed on the bottom wall. The reflective sheet is located in the chamber and attached to the back plate. The reflective sheet is provided with cut-outs, and two side edges of each cut-out are attached to each other to adapt to a corner of the back plate. The cut-outs may prevent the folded edge from wrinkling or folding at the corners of the side walls, so that the reflective sheet is smoothly installed, avoiding causing light spots.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.