US 12,736,719 B2Granted

Light transmissive injection molded article

AssigneeLG Electronics Inc.

InventorsHoon Kim, Seung Cheol Jung, Hee Sup Kim, Moon Gyu Kim

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Abstract

A light transmissive injection molded article is disclosed. In the light transmissive injection molded article of the present invention, one or more planes are formed at a front surface and a back surface. The planes of the back surface form a light reflection pattern configured to reflect light passing through the front surface toward the front surface. The planes of the back surface include a first inclined surface, a second inclined surface, and a third inclined surface. The first inclined surface is a plane inclined with respect to a normal direction of the front surface. The second inclined surface is a plane gradually approximating to the front surface as the second inclined surface extends far from the first inclined surface. The third inclined surface is a plane gradually approximating to the front surface as the third inclined surface extends far from the second inclined surface.

Claims16

Dependent claims

A light transmissive injection molded article formed with one or more planes at a front surface and a back surface thereof, wherein the planes of the back surface forming a plurality of light reflection patterns comprise:

a first inclined surface forming a surface inclined toward the back surface from a normal direction of the front surface;
a second inclined surface forming a surface inclined from the back surface toward the front surface;
and
a third inclined surface forming a surface inclined from the second surface toward the front surface,
wherein the first inclined surface, the second inclined surface, and the third inclined surface reflect at least a portion of light passing through the front surface in a sequential order and a reverse order,
wherein ‘in a sequential order’ means that the light passes through the first inclined surface before passing through the second inclined surface and ‘in a reverse order’ means that the light passes through the second inclined surface before passing through the first inclined surface,
wherein the first inclined surface gradually approximates to the front surface as the first inclined surface extends far from the second inclined surface, and the first inclined surface and the second inclined surface are interconnected,
wherein the first inclined surface and the second inclined surface satisfy a following expression:
tan
⁢
(
2
⁢
α
+
θ
1
)
=
L
1
⁢
sin
⁢
α
+
L
2
⁢
sin
⁢
β
L
1
⁢
cos
⁢
α
-
L
2
⁢
cos
⁢
β
θ
1
=
sin
-
1
(
1
n
1
⁢
sin
⁢
θ
0
)
where, θ0 is an incidence angle of light externally incident upon the front surface, θ0 is a refraction angle of the light incident upon the front surface, n1 is a refractive index of the light transmissive injection molded article, L1 is a length of the first inclined surface measured along an inclined direction of the first inclined surface, L2 is a length of the second inclined surface measured along an inclined direction of the second inclined surface, α is an angle of the first inclined surface with respect to the normal direction of the front surface and β is an angle of the second inclined surface with respect to the normal direction of the front surface.

59 more elements

A light transmissive injection molded article formed with one or more planes at a front surface and a back surface thereof, wherein:

the planes of the back surface form a light reflection pattern configured to reflect light passing through the front surface toward the front surface;
and
the planes of the back surface comprise:
a first inclined surface inclined with respect to a normal direction of the front surface;
a second inclined surface gradually approximating to the front surface as the second inclined surface extends far from the first inclined surface;
and
a third inclined surface provided at a side opposite to the first inclined surface with reference to the second inclined surface, the third inclined surface gradually approximating to the front surface as the third inclined surface extends far from the second inclined surface,
wherein the first inclined surface, the second inclined surface, and the third inclined surface reflect at least a portion of light passing through the front surface in a sequential order and a reverse order,
wherein ‘in a sequential order’ means that the light passes through the first inclined surface before passing through the second inclined surface, and ‘in a reverse order’ means that the light passes through the second inclined surface before passing through the first inclined surface,
wherein the first inclined surface gradually approximates to the front surface as the first inclined surface extends far from the second inclined surface, and the first inclined surface and the second inclined surface are interconnected,
wherein the first inclined surface and the second inclined surface satisfy a following expression:
tan
⁡
(
2
⁢
α
+
θ
1
)
=
L
1
⁢
sin
⁢
α
+
L
2
⁢
sin
⁢
β
L
1
⁢
cos
⁢
α
-
L
2
⁢
cos
⁢
β
θ
1
=
sin
-
1
(
1
n
1
⁢
sin
⁢
θ
0
)
where, θ0 is an incidence angle of light externally incident upon the front surface, θ1 is a refraction angle of the light incident upon the front surface, n1 is a refractive index of the light transmissive injection molded article, L1 is a length of the first inclined surface measured along an inclined direction of the first inclined surface, L2 is a length of the second inclined surface measured along an inclined direction of the second inclined surface, α is an angle of the first inclined surface with respect to the normal direction of the front surface, and β is an angle of the second inclined surface with respect to the normal direction of the front surface.

62 more elements

Dependencies are inferred from the claim text.