Timeline for concave conical lenses on 5050 SMD LEDs?
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 9, 2018 at 19:38 | comment | added | Josh | @WhatRoughBeast, true, with the depicted LEDs, the conical depression is in a piece of plastic that has been permanently molded to the LED itself. But there's no reason you couldn't take a bare LED and add an equivalent plastic piece. The light should enter the plastic "lens" (in quotes because I think it's really more like a prism) just fine, perpendicular to the bottom surface, and if the cone angle is right internal reflection should direct most of the light out the sides. | |
| Jul 7, 2018 at 21:07 | comment | added | D.A.S. | You will need many zone LEDs and diffuser panels to achieve 500 lumens/sq.m typical LED backlight display. | |
| Jul 7, 2018 at 19:27 | comment | added | jsotola | tear apart a scrap LCD computer monitor .... you will find a light diffuser panel between the LCD and the backlight lamps | |
| Jul 7, 2018 at 19:20 | comment | added | WhatRoughBeast | Those LEDs produce the "sideways" light not from a lens effect, but from strong internal reflection off the conical depression. You won't get this from an added external lens. | |
| Jul 7, 2018 at 19:14 | history | asked | Josh | CC BY-SA 4.0 |