Illumination unit and display apparatus
An illumination unit according to the present disclosure includes a plurality of first light-emission blocks, a plurality of second light-emission blocks, and a light-emission controller. The first light-emission blocks each include a plurality of first light-emitting devices arranged in a first direction. The second light-emission blocks are partially overlapped with the respective first light-emission blocks, and each include a plurality of second light-emitting devices arranged in a second direction different from the first direction. The light-emission controller performs light-emission control of the first light-emitting devices for each of the first light-emission blocks, and performs the light-emission control of the second light-emitting devices for each of the second light-emission blocks.
1. An illumination unit comprising:
a plurality of first light-emission blocks each including a plurality of first light-emitting devices arranged in a first direction;
a plurality of second light-emission blocks partially overlapped with the respective first light-emission blocks, and each including a plurality of second light-emitting devices arranged in a second direction different from the first direction; and
a light-emission controller that performs light-emission control of the first light-emitting devices for each of the first light-emission blocks, and performs the light-emission control of the second light-emitting devices for each of the second light-emission blocks;
wherein the first light-emission blocks and the second light-emission blocks are overlapped with one another respectively to form a plurality of partial light-emission blocks in the first direction and the second direction, one or more of the first light-emitting devices and one or more of the second light-emitting devices are disposed in each of the partial light-emission blocks, and the first light-emitting device and the second light-emitting device disposed in the partial light-emission block are packaged into one package while being allowed to be subjected to the light-emission control independently of each other.
2. The illumination unit according to claim 1 , wherein
the first light-emitting devices comprise first LED chips,
the second light-emitting devices comprise second LED chips subjected to the light-emission control independently of the first LED chips, and
at least one LED package in which one or more of the first LED chips and one or more of the second LED chips are packaged into one package is disposed in each of the partial light-emission blocks.
3. The illumination unit according to claim 1 , wherein the partial light-emission block has luminance that is sum of light-emission luminance of the first light-emitting device disposed in the partial light-emission block and light-emission luminance of the second light-emitting device disposed in the partial light-emission block.
4. The illumination unit according to claim 3 , wherein the light-emission controller
performs the light-emission control to allow light-emission luminance of the first light-emitting device provided in some of the first light-emission blocks of the plurality of first light-emission blocks and light-emission luminance of the second light-emitting device provided in some of the second light-emission blocks of the plurality of second light-emission blocks to be constant, and
variably controls light-emission luminance of the first light-emitting device provided in the first light-emission blocks other than the some of the first light-emission blocks and light-emission luminance of the second light-emitting device provided in the second light-emission blocks other than the some of the second light-emission blocks.
5. The illumination unit according to claim 4 , wherein the first light-emission blocks are provided side-by-side in the second direction, and include light-emission blocks located at least at both ends in the second direction of the first light-emission blocks, the light-emission blocks serving as the some of the first light-emission blocks.
6. The illumination unit according to claim 4 , wherein the second light-emission blocks are provided side-by-side in the first direction, and include light-emission blocks located at least at both ends in the first direction of the second light-emission blocks, the light-emission blocks serving as the some of the second light-emission blocks.
7. The illumination unit according to claim 4 , further comprising, in place of the some of the first light-emission blocks or the some of the second light-emission blocks, a plurality of non-light-emission blocks partially overlapped with the respective second light-emission blocks or the respective first light-emission blocks,
wherein the light-emission controller performs the light-emission control to allow the light-emission luminance of the first light-emitting device provided in the some of the first light-emission blocks or the second light-emitting device provided in the some of the second light-emission blocks to be constant.
8. The illumination unit according to claim 1 , further comprising, the first light-emitting device and the second light-emitting device are sealed on a substrate by a sealing member, the sealing member contain a resin material and a phosphor.
9. The illumination unit according to claim 8 , further comprising, at least one of the first light-emitting device and the second light-emitting device is a blue LED chip and the phosphor is a yellow phosphor, the LED package emit white light obtained as a result of a combination of blue light derived from the blue LED chip and the yellow light derived from the yellow phosphor.
10. A display apparatus comprising:
an illumination unit; and
a display panel that displays an image on a basis of illumination light derived from the illumination unit,
the illumination unit including
a plurality of first light-emission blocks each including a plurality of first light-emitting devices arranged in a first direction,
a plurality of second light-emission blocks partially overlapped with the respective first light-emission blocks, and each including a plurality of second light-emitting devices arranged in a second direction different from the first direction, and
a light-emission controller that performs light-emission control of the first light-emitting devices for each of the first light-emission blocks, and performs the light-emission control of the second light-emitting devices for each of the second light-emission blocks;
wherein the first light-emission blocks and the second light-emission blocks are overlapped with one another respectively to form a plurality of partial light-emission blocks in the first direction and the second direction, one or more of the first light-emitting devices and one or more of the second light-emitting devices are disposed in each of the partial light-emission blocks, and the first light-emitting device and the second light-emitting device disposed in the partial light-emission block are packaged into one package while being allowed to be subjected to the light-emission control independently of each other.
11. The display apparatus according to claim 10 , further comprising, the first light-emitting device and the second light-emitting device are sealed on a substrate by a sealing member, the sealing member contain a resin material and a phosphor.
12. The display apparatus according to claim 11 , further comprising, at least one of the first light-emitting device and the second light-emitting device is a blue LED chip and the phosphor is a yellow phosphor, the LED package emit white light obtained as a result of a combination of blue light derived from the blue LED chip and the yellow light derived from the yellow phosphor.