Optical plate and backlight module using the same
AssigneesHONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD., Hon Hai Precision Industry Co., Ltd.
InventorsShao-Han Chang, Fen Chen
Life of this patent
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Abstract
An exemplary optical plate includes at least one transparent plate unit. The transparent plate unit includes a light output surface, a bottom surface, a plurality of through holes and at least one lamp-receiving portion. The light output surface is opposite to the bottom surface. Each of the through holes communicates the light output surface with the bottom surface. The lamp-receiving portion is defined in the bottom surface. A backlight module using the present optical plate is also provided.
Claims12
An optical plate comprising:
- at least one transparent plate unit having:
- a light output surface;
- a bottom surface opposite to the light output surface;
- a plurality of through holes that communicate between the light output surface and the bottom surface, each of the through holes is selected from a group consisting of a columnar hole, a conical frustum hole, and a hole with a diameter thereof gradually increasing from a middle portion to its periphery, the through holes guiding the light internally reflected between the light output surface and the bottom surface out of the optical plate;
- and
- at least one lamp-receiving portion defined in the bottom 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 side-lighting type point light source disposed on the base, each point light source having a light-emitting portion;
- an optical plate positioned in the housing, the optical plate including at least one transparent plate unit having:
- a light output surface;
- a bottom surface opposite to the light output surface;
- a plurality of through holes that communicate between the light output surface and the bottom surface, each of the through holes is selected from the group consisting of a columnar hole, a conical frustum hole, and a hole with a diameter thereof gradually increasing from a middle portion to its periphery, the through holes guiding the light internally reflected between the light output surface and the bottom surface out of the optical plate;
- and
- at least one lamp-receiving portion defined in the bottom surface, wherein the light-emitting portion of the at least one point light source is inserted in the lamp-receiving portion correspondingly;
- and
- a light diffusion plate disposed on the housing over the opening.
Dependencies are inferred from the claim text.