Light guide plate and surface light source device
AssigneeOMRON Corporation
InventorsMasayuki Shinohara, Kazuhide Hirota, Takako Ishikawa
Life of this patent
Estimating the term…
Abstract
A light guide plate has a light introducing portion configured to confine light that is incident from an end surface, and a light guide-plate main body configured to emit incident light to an outside from a light emitting surface and provided continuously with the light introducing portion in a thickness smaller than a maximum thickness of the light introducing portion. The light introducing portion has an inclined surface inclined toward the light guide-plate main body from a surface having a larger thickness than a thickness of the light guide-plate main body, on at least one of a surface at a light emission side and a surface opposite to the surface at the light emission side.
Claims8
A light guide plate comprising:
- a light introducing portion configured to confine light that is incident from an end surface;
- and
- a light guide-plate main body configured to emit incident light to an outside from a light emitting surface and provided continuously with the light introducing portion in a thickness smaller than a maximum thickness of the light introducing portion,
- wherein the light introducing portion comprises an inclined surface inclined toward the light guide-plate main body from a surface comprising a larger thickness than a thickness of the light guide-plate main body, on at least one of a surface at a light emission side and a surface opposite to the surface at the light emission side,
- wherein the light guide-plate main body comprises a directional transform pattern comprising stripe-shaped pattern elements on at least one of the surface at the light emission side and the surface opposite to the surface at the light emission side, and
- wherein light reflecting portions are provided on the light light-plate body in a region from the light introducing portion to a portion adjacent to the light introducing portion when viewed from a side.
A mobile device comprising:
- a liquid-crystal display device comprising:
- a light source configured to emit light;
- a light guide plate comprising:
- an end face on which light from the light source is incident;
- a light introducing portion configured to confine light that is incident from the end surface;
- and
- a light guide-plate main body configured to emit incident light to an outside from a light emitting surface and provided continuously with the light introducing portion in a thickness smaller than a maximum thickness of the light introducing portion,
- wherein the light introducing portion comprises an inclined surface inclined toward the light guide-plate main body from a surface comprising a larger thickness than a thickness of the light guide-plate main body, on at least one of a surface at a light emission side and a surface opposite to the surface at the light emission side,
- wherein the light guide-plate main body comprises a directional transform pattern comprising stripe-shaped pattern elements on at least one of the surface at the light emission side and the surface opposite to the surface at the light emission side, and
- wherein light reflecting portions are provided on the light light-plate body in a region from the light introducing portion to a portion adjacent to the light introducing portion when viewed from a side;
- and
- a liquid-crystal display panel arranged opposite to the light emitting surface of the light guide plate.
Dependencies are inferred from the claim text.