Illumination device and display device
AssigneeSharp Display Technology Corporation
InventorsYuuichi Kanbayashi, Shugo Yagi, Satoshi Tsubooka
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Abstract
A backlight device includes at least a plurality of LEDs arranged in a row, a light guide plate including at least a light entering end face having a plate shape, and a light refracting portion configured with a plurality of unit light refracting portions arranged side by side on the light entering end face along an alignment direction of the plurality of LEDs, wherein in the light refracting portion, an occupancy rate occupied by the unit light refracting portion in an end side portion of the light entering end face in the alignment direction is made lower than an occupancy rate occupied by the unit light refracting portion in a central side portion of the light entering end face in the alignment direction.
Claims22
An illumination device comprising:
- a plurality of light sources arranged in a row;
- a light guide plate including at least a light entering end face having a plate shape, the light entering end face including an outer peripheral edge face on which light emitted from the plurality of light sources is incident, and an opposite end face to the light entering end face disposed at an opposite side to the light entering end face, the light guide plate having one plate face serving as a light emission plate face configured to emit light;
- and
- a light refracting portion configured with a plurality of unit light refracting portions arranged side by side on the light entering end face along an alignment direction of the plurality of light sources, the light refracting portion being configured to refract incident light,
- wherein in the light refracting portion, an occupancy rate occupied by the unit light refracting portions in an end side portion of the light entering end face in the alignment direction is made lower than an occupancy rate occupied by the unit light refracting portions in a central side portion of the light entering end face in the alignment direction, and
- the light refracting portion is configured to have the occupancy rate in the end side portion being equal to or greater than 50% and equal to or less than 60% in percent figures.
An illumination device comprising:
- a plurality of light sources arranged in a row;
- a light guide plate including at least a light entering end face having a plate shape, the light entering end face including an outer peripheral edge face on which light emitted from the plurality of light sources is incident, and an opposite end face to the light entering end face disposed at an opposite side to the light entering end face, the light guide plate having one plate face serving as a light emission plate face configured to emit light;
- a light refracting portion configured with a plurality of unit light refracting portions arranged side by side on the light entering end face along an alignment direction of the plurality of light sources, the light refracting portion being configured to refract incident light;
- a first prism sheet disposed on a light emission side with respect to the light guide plate, the first prism sheet being provided with a plurality of first unit prisms arranged side by side along a direction from each of the plurality of light sources toward the light guide plate on a light emission face configured to emit light, the plurality of first unit prisms extending along the alignment direction;
- and
- a second prism sheet disposed on a light emission side with respect to the first prism sheet, the second prism sheet being provided with a plurality of second unit prisms arranged side by side along the direction from each of the plurality of light sources toward the light guide plate on the light emission face configured to emit light, the plurality of second unit prisms extending along the alignment direction,
- wherein in the light refracting portion, an occupancy rate occupied by the unit light refracting portions in an end side portion of the light entering end face in the alignment direction is made lower than an occupancy rate occupied by the unit light refracting portions in a central side portion of the light entering end face in the alignment direction.
Dependencies are inferred from the claim text.