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US 8,075,151 B2Granted
Surface light source device and image display device
AssigneeSony Corporation
InventorsAtsushi Ito, Yoshiaki Kouyama
Life of this patent
Estimating the term…
Abstract
A surface light source device includes a diffusing member which diffuses light, a reflective member which reflects light, plural light sources provided aligned in a flat manner between the diffusing member and the reflective member, and a light control member provided between the plural light sources and the reflective member as well as arranged in a state that a gap is imposed between the reflective member and the light control member, which has a light-guiding function of guiding part of light emitted from respective light sources in an alignment direction of the light sources, in which the light control member has a rugged structure portion in which geometric shapes in cross section are continuously formed on at least one surface.
Claims12
A surface light source device comprising:
- a diffusing member which diffuses light;
- a reflective member which reflects light;
- plural light sources provided aligned in a flat manner between the diffusing member and the reflective member;
- and
- a light control member provided between the plural light sources and the reflective member as well as arranged in a state that a gap is imposed between the reflective member and the light control member, which has a light-guiding function of guiding part of light emitted from respective light sources in an alignment direction of the light sources, and
- wherein the light control member has a rugged structure portion in which geometric shapes in cross section are continuously formed on at least one surface,
- wherein the light control member has the rugged structure portion at a surface of a side facing the reflective member, and
- wherein the light control member is arranged in the state that apexes of convex portions included in the rugged structure portion are allowed to abut on a reflective surface of the reflective member.
5 more elements
A surface light source device comprising:
- a diffusing member which diffuses light;
- a reflective member which reflects light;
- plural light sources provided aligned in a flat manner between the diffusing member and the reflective member;
- and
- a light control member provided between the plural light sources and the reflective member as well as arranged in a state that a gap is imposed between the reflective member and the light control member, which has a light-guiding function of guiding part of light emitted from respective light sources in an alignment direction of the light sources,
- wherein the light control member has a rugged structure portion in which geometric shapes in cross section are continuously formed on at least one surface, and
- wherein a convex portion included in the rugged structure portion is formed to have a polygonal shape in cross section including at least two slopes having different inclination angles with respect to a reference axis which is perpendicular to a virtual plane parallel to a light emitting surface of the diffusing member.
4 more elements
A surface light source device comprising:
- a diffusing member which diffuses light;
- a reflective member which reflects light;
- plural light sources provided aligned in a flat manner between the diffusing member and the reflective member;
- a light control member provided between the plural light sources and the reflective member as well as arranged in a state that a gap is imposed between the reflective member and the light control member, which has a light-guiding function of guiding part of light emitted from respective light sources in an alignment direction of the light sources,
- a casing covered with the reflective member;
- and
- a fixing member including pin portions in which locking portions are provided at tips, which fixes the reflective member and the light control member to the casing,
- wherein the light control member has a rugged structure portion in which geometric shapes in cross section are continuously formed on at least one surface, and
- wherein piercing holes are provided at plural positions corresponding to portions in the reflective member, the light control member and the casing, and the locking portions are locked at an outer surface of the casing in a state in which the pin portions of the fixing member are inserted into respective piercing holes from the light control member side.
6 more elements
An image display device comprising:
- a surface light source device including a diffusing member which diffuses light, a reflective member which reflects light, plural light sources provided aligned in a flat manner between the diffusing member and the reflective member, and a light control member provided between the plural light sources and the reflective member as well as arranged in a state that a gap is imposed between the reflective member and the light control member, which has a light-guiding function of guiding part of light emitted from respective light sources in an alignment direction of the light sources, in which the light control member has a rugged structure portion in which geometric shapes in cross section are continuously formed on at least one surface;
- and
- a display panel in which light irradiated from the surface light source device is selectively transmitted,
- wherein the light control member has the rugged structure portion at a surface of a side facing the reflective member, and
- wherein the light control member is arranged in the state that apexes of convex portions included in the rugged structure portion are allowed to abut on a reflective surface of the reflective member.
2 more elements
Dependencies are inferred from the claim text.