Converging sheet, surface light source unit, and transmission type display
First Claim
1. A converging sheet disposed in a surface light source unit containing a light source member, having a sheet face and converging light from the light source member, the converging sheet comprising:
- a light-emerging-side lens member formed of a plurality of unit lenses of convex shape that are arranged on a light-emerging side at a predetermined lens pitch; and
a scattering layer that is formed along a surface of each unit lens, and scatters light.
1 Assignment
0 Petitions
Accused Products
Abstract
A converging sheet includes a light-emerging-side lens member formed of a plurality of unit lenses of convex shape that are arranged on a light-emerging side, and a scattering layer that is formed along a surface of each unit lens and scatters light. The scattering layer includes light diffusing particles. A thickness t of the scattering layer is equal to or more than one-tenth the lens pitch p. The converging sheet satisfies the following relationships: d×((t+h+p)/Φ)>50% and d×(t/Φ)<50%, in which d represents a volume ratio (%) of the light diffusing particles mixed in the scattering layer relative to the scattering layer, Φ represents an average grain diameter (mm) of the light diffusing particles, and h represents a height from the apex to a bottom of the convex shape of the unit lens.
36 Citations
20 Claims
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1. A converging sheet disposed in a surface light source unit containing a light source member, having a sheet face and converging light from the light source member, the converging sheet comprising:
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a light-emerging-side lens member formed of a plurality of unit lenses of convex shape that are arranged on a light-emerging side at a predetermined lens pitch; and
a scattering layer that is formed along a surface of each unit lens, and scatters light. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A surface light source unit disposed on a rear side of a transmission type display member, comprising:
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a light source member formed of a plurality of light sources arranged in parallel; and
a converging sheet having a sheet face and converging light from the light source member;
whereinthe converging sheet comprises;
a light-emerging-side lens member formed of a plurality of unit lenses of convex shape that are arranged on a light-emerging side at a predetermined lens pitch; and
a scattering layer that is formed along a surface of each unit lens, and scatters light. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. A transmission type display comprising:
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a transmission type display member; and
a surface light source unit disposed on a rear side of the transmission type display member, including;
a light source member formed of a plurality of light sources arranged in parallel; and
a converging sheet converging light from the light source member;
whereinthe converging sheet comprises;
a light-emerging-side lens member formed of a plurality of unit lenses of convex shape that are arranged on a light-emerging side at a predetermined lens pitch; and
a scattering layer that is formed along a surface of each unit lens, and scatters light. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification