Lighting device, display device and television device
First Claim
1. A lighting device comprising:
- a light source with a light intensity distribution in which light having a peak light intensity travels in a direction inclined with respect to a front direction, the light source including a light emitting portion and a lens;
a chassis housing the light source on a mounting surface and including an opening on a light exit side of the lighting device; and
a light leading member provided to extend from the mounting surface toward the light exit side, the light leading member being configured to lead light from the light source toward the light exit side;
whereinthe light leading member is inclined with respect to the front direction;
the light leading member includes a light leading surface facing the light source;
the light leading surface is located on a side opposite to the light exit side with respect to an optical path of the light having the peak light intensity, such that the light leading surface does not overlap with the optical path;
each of the angle between the light leading surface and the front direction and the angle between the light having the peak light intensity and the front direction is in a range from 45 degrees to 90 degrees; and
light traveling from the light source in the front direction has a lowest light intensity out of all light emitted from the light source in a range from 0 degrees to 90 degrees after exiting the lens; and
the light intensity distribution gradually increases as an absolute value of an angle with respect to the front direction increases and gradually decreases after the angle with respect to the front direction exceeds a position at which the light having the peak light intensity is provided.
1 Assignment
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Accused Products
Abstract
An object of the present invention is to suppress the brightness distribution in the lighting device. The backlight unit 12 according to the present invention includes an LED 17 as a light source with a light intensity distribution in which light having a peak light intensity travels in a direction inclined with respect to a front direction, a chassis 14 having an opening on a light exit side and housing the LED 17, and a light leading member 22 provided to extend from a mounting surface of the LED 17 toward the light exit side. The light leading member 22 is configured to lead light from the LED 17 toward the light exit side. The employment of the LED 17 with the above light intensity distribution enables an irradiation area A irradiated with the light having the peak light intensity to be larger. This reduces the uneven that may occur in the brightness distribution of the outgoing light.
23 Citations
18 Claims
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1. A lighting device comprising:
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a light source with a light intensity distribution in which light having a peak light intensity travels in a direction inclined with respect to a front direction, the light source including a light emitting portion and a lens; a chassis housing the light source on a mounting surface and including an opening on a light exit side of the lighting device; and a light leading member provided to extend from the mounting surface toward the light exit side, the light leading member being configured to lead light from the light source toward the light exit side;
whereinthe light leading member is inclined with respect to the front direction; the light leading member includes a light leading surface facing the light source; the light leading surface is located on a side opposite to the light exit side with respect to an optical path of the light having the peak light intensity, such that the light leading surface does not overlap with the optical path; each of the angle between the light leading surface and the front direction and the angle between the light having the peak light intensity and the front direction is in a range from 45 degrees to 90 degrees; and light traveling from the light source in the front direction has a lowest light intensity out of all light emitted from the light source in a range from 0 degrees to 90 degrees after exiting the lens; and the light intensity distribution gradually increases as an absolute value of an angle with respect to the front direction increases and gradually decreases after the angle with respect to the front direction exceeds a position at which the light having the peak light intensity is provided. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification