Optical plate and backlight module using the same
AssigneeHon Hai Precision Industry Co., Ltd.
InventorShao-Han Chang
Life of this patent
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Abstract
An exemplary optical plate includes a plurality of transparent plate units. The transparent plate unit includes a first surface, a second surface, a plurality of conical frustum protrusions, a diffusion layer and a lamp-receiving portion. The second surface is opposite to the first surface. The conical frustum protrusions are formed at the first surface. Each conical frustum protrusion comprises two conical frustums. The diffusion layer is formed at the second surface. The lamp-receiving portion is defined in one of the first surface and the second surface. A backlight module using the optical plate is also provided.
Claims20
An optical plate comprising:
- at least one transparent plate unit having:
- a first surface;
- a second surface opposite to the first surface;
- a plurality of conical frustum protrusions formed on the second surface;
- and
- at least a lamp-receiving portion defined in at least one of the first surface and the second surface;
- and
- a diffusion layer formed on the second surface.
A backlight module comprising:
- a housing having a base and a plurality of sidewalls extending from a periphery of the base, the base and the sidewalls cooperatively forming an opening;
- at least one point light source disposed on the base, each point light source having a light-emitting portion;
- at least one reflective member is positioned above the top of the light-emitting portion;
- a light diffusion plate disposed on the housing over the opening;
- and
- an optical plate positioned in the housing, the optical plate including at least one transparent plate unit having:
- a first surface,
- a second surface opposite to the first surface,
- a plurality of conical frustum protrusions formed on the second surface;
- and
- at least a lamp-receiving portion defined in at least one of the first surface and the second surface;
- and
- a diffusion layer formed at the second surface, wherein the light-emitting portion of the at least one point light source is inserted in the lamp-receiving portion correspondingly.
Dependencies are inferred from the claim text.