Illuminating apparatus with reduced glare
AssigneeSamsung Electronics Co., Ltd.
InventorHyeong-won Yun
Life of this patent
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Abstract
An illuminating apparatus includes a light source unit including a plurality of LED packages, a first prism plate arranged on the plurality of LED packages and having a prism pattern formed thereon, and a second prism plate provided on the first prism plate, and arranged such that a lengthwise direction of a prism pattern formed on the second prism plate crosses a lengthwise direction of the prism pattern of the first prism plate. A triangular shape in a cross-section of the prism pattern of each of the first and second prism plates is an isosceles triangle, and a height H and a bottom side length L of the isosceles triangle satisfy the following conditions that 0.1L≦H≦0.2L.
Claims17
An illuminating apparatus comprising:
- a light source unit comprising a plurality of LED packages;
- a first prism plate arranged on the plurality of LED packages and having a prism pattern formed thereon;
- and
- a second prism plate provided on the first prism plate, and arranged such that a lengthwise direction of a prism pattern formed on the second prism plate crosses a lengthwise direction of the prism pattern of the first prism plate,
- wherein a triangular shape in a cross-section of the prism pattern of each of the first and second prism plates is an isosceles triangle, and a height H and a bottom side length L of the isosceles triangle satisfy the following conditions that 0.1L≦H≦0.2L.
An illuminating apparatus comprising:
- a light source unit comprising a plurality of LED packages;
- and
- an optical member arranged on the light source unit and changing distribution of light emitted from the light source unit,
- wherein a luminous intensity distribution curve of illumination light passing through the optical member is formed within a range of about −70° to about 70°, and
- wherein the optical member comprises a first prism plate including a prism pattern having an isosceles triangular shape in cross-section and a height H and a bottom side length L of the isosceles triangle satisfying 0.1L≦H≦0.2L.
Dependencies are inferred from the claim text.