Lighting plays a crucial role in various applications, including displays, automotive lighting, and backlighting. Two commonly used components in these applications are LED diffuser sheets and light guide plates (LGP). Both of these components have similar functions, but they are designed differently and have different properties.
Difference in Functionality
LED diffuser
sheets are used to diffuse light emitted from LED lights. The main function of
a diffuser sheet is to scatter the light evenly in all directions. This results
in a uniform and soft lighting effect, eliminating hotspots and shadows. LED
diffuser sheets are typically made of a transparent material, such as
polycarbonate or acrylic, and have a matte or frosted surface.
Light guide
plates or lgp sheets, on the other hand, are used to guide
light from a light source and distribute it evenly. Light guide plates are
typically made of a transparent material, such as acrylic or polycarbonate, and
have a smooth surface. Light enters the light guide plate through an edge or a
surface, and is then redirected by internal reflection to the output surface,
where it is emitted as a uniform light.
The Way
They Diffuse Light Differ
One of the
main differences between LED diffuser sheets and light guide plates is the way
they diffuse light. LED light diffuser sheets diffuse light by scattering it in all
directions, while light guide plates diffuse light by guiding it through
internal reflection. This results in different lighting effects. LED diffuser
sheets produce a soft and uniform light, while light guide plates produce a
bright and uniform light.
Differences
in Their Thickness
Another
difference between LED diffuser sheets and light guide plates is their
thickness. LED diffuser sheets are typically thinner than light guide plates,
as they only need to scatter light. Light guide plates, on the other hand, need
to guide light over a longer distance and therefore have to be thicker.
Different
Optical Properties
LED
diffuser sheets
and light guide plates also have different optical properties. LED diffuser
sheets have a lower transmission rate than light guide plates, as they scatter
light in all directions. Light guide plates, on the other hand, have a higher
transmission rate as they guide light through internal reflection. This results
in higher luminous efficacy for light guide plates compared to LED diffuser
sheets.
Applications
In terms of
applications, LED light diffuser sheets are commonly used in backlighting
applications, where a uniform and soft lighting effect is desired. They are
also used in display panels, where they help to eliminate hotspots and improve
the visual quality of the display.
Light
guide plates, on
the other hand, are commonly used in applications where a bright and uniform lighting
effect is desired, such as automotive lighting, edge-lit signs, and backlit
keyboards. They are also used in display panels, where they help to improve the
brightness and uniformity of the display.
Final Word
In conclusion,
LED diffuser sheets and light guide plates are both important components in
lighting applications. While they have similar functions, they are designed
differently and have different properties. LED diffuser sheets diffuse light by
scattering it in all directions, while light guide plates diffuse light by
guiding it through internal reflection. LED diffuser sheets are
commonly used in backlighting applications, while light guide plates are
commonly used in automotive lighting and display panels. Both components play a
crucial role in ensuring uniform and bright lighting in various applications.
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