Abstract
We designed an edge-lighting light guide plate (LGP) based on a
micro-prism structure for liquid crystal display. Its top and bottom
surfaces have micro-prisms, and a layer of high reflection film is coated on
the bottom surface. The principle of the LGP was analyzed. The optical
simulation tool ASAP was used to calculate the apex angle and height of the
micro-prism on the top of the LGP, the apex angle of the micro-prism on the
bottom of the LGP and the emitting angle dependent luminous flux of the LGP.
By adjusting the width of micro-prisms on the bottom, the LGP achieved
uniform luminance. A 12-in LGP based on a micro-prism structure as an
example was designed. The results proved that the LGP based on a micro-prism
structure is thin and simple with uniform luminance and high
efficiency.
© 2009 IEEE
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