Backlight and liquid crystal display device
AssigneeJapan Display Inc.
InventorsKoji FUJISAWA, Michihide SHIBATA, Masafumi OKADA
Life of this patent
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Abstract
In a backlight that includes a plurality of LEDs and a prism sheet disposed opposite to the LEDs, the prism sheet has a first surface opposite to the LEDs and a second surface on the opposite side of the first surface, a first prism having a first base and a first pitch L1 is formed on the first surface, a second prism having a cross section that is scalene triangular in shape having a second base having a length L2, a first base angle θ1, and a second base angle θ2 smaller than the first base angle is formed on the second surface, and L2<L1.
Claims8
A backlight that includes a plurality of LEDs and a prism sheet disposed opposite to the LEDs,
- wherein the prism sheet has a first surface opposite to the LEDs and a second surface on the opposite side of the first surface,
- wherein a first prism having a first base and a first pitch L1 is formed on the first surface,
- wherein a second prism having a cross section that is scalene triangular in shape having a second base having a length L2, a first base angle, and a second base angle smaller than the first base angle is formed on the second surface, and
- wherein L2<L1.
Dependencies are inferred from the claim text.