Diffusers are used to modify LED lighting systems.

There are several types of films that can be used to change a lighting device. A diffuser is a common type of film. Diffusers come in a variety of shapes and sizes, including papers, tapes, and panels. They may also differ in terms of thickness and light transmissivity.

They are used to disperse light to make the device more diffuse, as well as to even out lighting profiles. When using diffusers, keep in mind that the more diffuse the film, the better the visual appearance but the worse the performance.

Edge-Lit Device Diffusers

Diffusers in edge-lit systems add another layer for the light to communicate with, reducing efficiency. The more diffuse this layer is, the less light that can pass through, lowering the overall performance of the device.

The addition of a diffuser changes the system's directionality and results in a more lambertian performance. Some light diffuser sheets can form the output distribution at various angles.

Diffusers can help to conceal hotspots caused by LEDs by scattering the light and making it appear more uniform. This also helps to conceal any flaws or contradictions on the light guide. When lit, diffusers emit a softer-looking glow. When the machine is switched off, it will appear the color of the diffuser, which is usually a milky white.

Diffusers in a Direct-Lighting System

Diffusers in direct-lit systems can reduce performance as well. The same rule holds true in edge-lit systems: the higher the diffusion, the lower the performance.

There would be no overpowering effect by using a diffuser in a Direct-lit system. Light shaping diffusers will help to create slightly different outputs and cutoffs, but since LEDs already emit a lambertian distribution, no dramatic adjustments can occur.

Diffuser films can help to conceal LED light sources by blending the light together to make it appear more uniform. When lit, they emit a softer-looking glow. When the device is not turned on, the audience can see the diffuser rather than the direct LEDs, which can be much more visually appealing.

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