The discussion revolves around the efficiency differences between conventional square LEDs and triangular LEDs. Participants explore factors influencing LED efficiency, including design shapes, light extraction, and optical principles such as total internal reflection and Snell's law. The conversation includes technical considerations related to LED construction and performance.
Participants express differing views on the factors affecting LED efficiency, with no consensus reached on the specific reasons why square LEDs may be less efficient than triangular ones.
Participants have not established a clear framework for comparing the efficiency of different LED shapes, and assumptions about the optical properties and design considerations remain unresolved.
greynoon said:Could someone please differentiate this to me? "Why Conventional square LEDs are less efficient than triangular LEDs.
If any of you guys could help me out, or point me in the right direction, it would be a great help!
Thank you in advance!
berkeman said:Yikes. I have an idea, but I need to know if this is a homework/coursework question first. We handle posts differently if they are for homework/coursework.
What is the context of the question? What are your thoughts on it so far? What factors go into the efficiency of an LED, from electrical energy to the final light energy that makes it out into the air?
greynoon said:My thoughts so far are: It has something to do with total internal reflection or snells law!
http://en.wikipedia.org/wiki/LED#Light_extraction"Substrates that are transparent to the emitted wavelength, and backed by a reflective layer, and light spreading layer, increase the LED efficiency. The refractive index of the package material should match the index of the semiconductor, otherwise the produced light gets partially reflected back into the semiconductor, where it may be absorbed and turned into additional heat, thus lowering the efficiency.