Light guide plate, and surface light source device and display device utilizing the same
AssigneeSanyo Electric Co., Ltd.
InventorKoji Mabuchi
Life of this patent
Estimating the term…
Abstract
A surface light source device includes a light guide plate disposed on an upper surface of a liquid crystal panel unit and a linear light source disposed extending in a direction parallel to a side surface of the light guide plate. A plurality of linear prisms are formed on an upper surface of the light guide plate in a manner of extending in a direction oblique to the side surface. A light irradiated from the linear light source to the light guide plate through the side surface is reflected by a reflecting surface formed by each of linear prisms to be irradiated onto the liquid crystal panel unit provided below a lower surface of the plate. A height of the reflecting surface of each of linear prisms is changed in a lengthwise direction thereof.
Claims8
A light guide plate, comprising:
- a side surface to which light is irradiated;
- and
- an upper surface formed with a plurality of lengthwise prisms extending in a direction oblique to said side surface, wherein
- a height of a plurality of slopes forming said plurality of prisms and opposed to said side surface is changed in a lengthwise direction of the prisms, and
- the oblique direction is determined by a predetermined angle.
A light guide plate, comprising:
- a side surface to which light is irradiated;
- and
- an upper surface formed with a plurality of prisms extending in a direction oblique to said side surface, wherein
- a height of a plurality of slopes forming said plurality of prisms and opposed to said side surface is made higher away from said side surface, and
- the oblique direction is determined by a predetermined angle.
A surface light source device, comprising:
- a light guide plate including a side surface to which a light is irradiated and an upper surface formed with a plurality of lengthwise prisms extending in a direction oblique to said side surface, wherein a height of a plurality of slopes forming said plurality of prisms and opposed to said side surface is changed in a lengthwise direction of the prisms;
- and
- a linear light source disposed extending in a direction parallel to said side surface, wherein
- the oblique direction is determined by a predetermined angle.
A surface light source device, comprising:
- a light guide plate including a side surface to which a light is irradiated and an upper surface formed with a plurality of prisms extending in a direction oblique to said side surface, wherein a height of a plurality of slopes forming said plurality of prisms and opposed to said side surface is made higher away from said side surface;
- and
- a linear light source disposed extending in a direction parallel to said side surface, wherein
- the oblique direction is determined by a predetermined angle.
A display device, comprising:
- a light guide plate including a side surface to which a light is irradiated, an upper surface formed with a plurality of lengthwise prisms extending in a direction oblique to said side surface, and a lower surface opposed to said upper surface, wherein a height of a plurality of slopes forming said plurality of prisms and opposed to said side surface is changed in a lengthwise direction of the prisms;
- a linear light source disposed extending in a direction parallel to said side surface and
- a liquid crystal display panel disposed on said lower surface, and
- the oblique direction is determined by a predetermined angle.
A display device, comprising:
- a light guide plate including a side surface to which a light is irradiated, an upper surface formed with a plurality of prisms extending in a direction oblique to said side surface, and a lower surface opposed to said upper surface, wherein a height of a plurality of slopes forming said plurality of prisms and opposed to said side surface is made higher away from said side surface;
- a linear light source disposed extending in a direction parallel to said side surface and
- a liquid crystal display panel disposed on said lower surface, wherein
- the oblique direction is determined by a predetermined angle.
Dependencies are inferred from the claim text.