Spread illuminating apparatus with means for reflecting light dispersely
AssigneeMinebea Co., Ltd.
InventorsToru Kunimochi, Shingo Suzuki, Motoji Egawa, Takahiro Shimura, Shigeyuki Oishi
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Abstract
A spread illuminating apparatus comprises: a light conductive plate made of a light transmissible material; a bar-like lamp disposed along and close to an end face of the light conductive plate; a light reflection pattern having a stair-like configuration in section, and formed on a major face of the light conductive plate; and a light dispersive-reflection pattern comprising a plurality of, for example, convex surfaces continuous with each other, and formed on a major face of the light conductive plate opposite to the major face provided with the light reflection pattern.
Claims12
A spread illuminating apparatus of side light type, comprising:
- a light conductive plate made of a light transmissible material;
- a bar-like lamp disposed along and close to an end face of the light conductive plate;
- a light reflection pattern having a stair-like configuration in section, and formed on a major face of the light conductive plate;
- and
- a light dispersive-reflection pattern, the light dispersive-reflection pattern being formed on a major face of the light conductive plate opposite to the major face provided with the light reflection pattern.
A spread illuminating apparatus according to Claim2 or 3, wherein a maximum angle made by a tangent line to the convex surface with respect to an imaginary datum parallel to the light conductive plate does not exceed 3 degrees.
Dependencies are inferred from the claim text.