Lighting unit and display provided with the same

A lighting unit comprising:

• a light guide plate having a first groove and a second groove formed therein;
• a first light source group accommodated in the first groove;
• and
• a second light source group accommodated in the second groove;
• wherein the light guide plate has a first light mixing area, a first light emitting area and a second light mixing area in that order from the first groove toward the second groove;
• wherein, in the first light mixing area, the thickness of the light guide plate progressively increases away from the first light source group;
• wherein, in the second light mixing area, the thickness of the light guide plate progressively increases away from the second light source group;
• wherein, in the first light emitting area, the light guide plate is flat-plate-like;
• wherein the first groove accommodates a third light source group and a heat sink;
• wherein the first light source group is arranged on one side of the heat sink and the third light source group is arranged on the other side of the heat sink;
• and
• wherein a plurality of light sources making up the first light source group and a plurality of light sources making up the third light source group are staggered.

A lighting unit comprising:

• a light guide plate having a first groove and a second groove formed therein;
• a first light source group accommodated in the first groove;
• and
• a second light source group accommodated in the second groove;
• wherein the light guide plate has a first light mixing area, a first light emitting area and a second light mixing area in that order from the first groove toward the second groove;
• wherein, in the first light mixing area, the thickness of the light guide plate progressively increases away from the first light source group;
• wherein, in the second light mixing area, the thickness of the light guide plate progressively increases away from the second light source group;
• wherein, in the first light emitting area, the light guide plate is flat-plate-like;
• and
• wherein the quantity of light emitted from the first light source group is greatest in a direction parallel to a flat-plate-like plane of the light guide plate.

A lighting unit comprising:

• a light guide plate having a first groove and a second groove formed therein;
• a first light source group accommodated in the first groove;
• and
• a second light source group accommodated in the second groove;
• wherein the light guide plate has a first light mixing area, a first light emitting area and a second light mixing area in that order from the first groove toward the second groove;
• wherein, in the first light mixing area, the thickness of the light guide plate progressively increases away from the first light source group;
• wherein, in the second light mixing area, the thickness of the light guide plate progressively increases away from the second light source group;
• wherein, in the first light emitting area, the light guide plate is flat-plate-like;
• and
• wherein the quantity of light emitted from the first light source group is greatest in a direction inclined from a direction parallel to a flat-plate-like plane of the light guide plate toward a back side of the light guide plate.

A lighting unit comprising:

• a light guide plate having a first groove and a second groove formed therein;
• a first light source group accommodated in the first groove;
• and
• a second light source group accommodated in the second groove;
• wherein the light guide plate has a first light mixing area, a first light emitting area and a second light mixing area in that order from the first groove toward the second groove;
• wherein, in the first light mixing area, the thickness of the light guide plate progressively increases away from the first light source group;
• wherein, in the second light mixing area, the thickness of the light guide plate progressively increases away from the second light source group;
• wherein, in the first light emitting area, the light guide plate is flat-plate-like;
• wherein, after being emitted from the first light source group, the light leaving the first light emitting area of the light guide plate from a front side thereof is greater in quantity than the light leaving the first light mixing area of the light guide plate from the front side thereof;
• and
• wherein, after being emitted from the second light source group, the light leaving the first light emitting area of the light guide plate from the front side thereof is greater in quantity than the light leaving the second light mixing area of the light guide plate from the front side thereof.

A lighting unit comprising:

• a light guide plate having a first groove and a second groove formed therein;
• a first light source group accommodated in the first groove;
• a second light source group accommodated in the second groove;
• a third light source group accommodated in the first groove;
• and
• a heat sink accommodated in the first groove;
• wherein the light guide plate has a first light mixing area, a first light emitting area and a second light mixing area in that order from the first groove toward the second groove;
• wherein, in the first light mixing area, the thickness of the light guide plate progressively increases away from the first light source group;
• wherein, in the second light mixing area, the thickness of the light guide plate progressively increases away from the second light source group;
• wherein, in the first light emitting area, the light guide plate is flat-plate-like;
• and
• wherein light sources constituting the first light source group and light sources constituting the third light source group are alternatively disposed in a single line on one side of the heat sink, and a direction of light emitted from the first light source group is opposite to a direction of light emitted from the third light source group.