Illumination device
An Illumination device includes light emitting devices and an optical system for collimating light emitted by the light emitting devices. A first group of the light emitting devices are arranged in a first array having first gaps, and a first optical system is arranged near the first group of light emitting devices. At least one second group of the light emitting devices are arranged in a second array, and the second array has second gaps. The second optical system is arranged near the second group of light emitting devices. The first and second optical systems are arranged so that, in a distance from the illumination device, light emitted by the first group of light emitting devices, collimated by the first optical system, and light emitted by the second group of light emitting devices, collimated by the second optical system, are superimposed to form a gap-free illumination field.
1 . An illumination device, including:
an LED module; and
an optical system arranged in proximity to the LED module and configured to collimate light emitted by the LED module,
wherein the LED module includes:
a circuit board;
light sources configured to emit excitation light;
phosphors covering the light sources; and
a light blocking layer arranged on lateral sides of the phosphors;
wherein:
a first group of the light sources is arranged in a first linear array and electrically connected to first connection wires,
a second group of the light sources is arranged in a second linear array parallel to the first linear array and electrically connected to second connection wires,
each of the light sources in the first group includes a light emitting surface having a size of 1 mm 2 or less, and
at least one of the light sources in the first group is controlled separately from at least one of the light sources in the second group.
2 . The illumination device of claim 1 , wherein the phosphors include particles including one or more different types of phosphors.
3 . The illumination device of claim 1 , wherein the light sources in the first group are electrically connected to a common conductor.
4 . The illumination device of claim 3 , wherein the light sources in the second group are electrically connected to the common conductor.
5 . The illumination device of claim 1 , wherein the light sources in the first group are separated from each other by a first gap.
6 . The illumination device of claim 1 , wherein the first group of the light sources and the second group of the light sources are placed on the circuit board.
7 . The illumination device of claim 6 , wherein a number of the light sources in the first group is greater than a number of the light sources in the second group.
8 . An illumination device, including:
an LED module; and
an optical system arranged in proximity to the LED module and configured to collimate light emitted by the LED module,
wherein the LED module includes:
a circuit board;
light sources configured to emit excitation light;
light transparent layers disposed on the light sources; and
a light blocking layer arranged on lateral sides of the light sources;
wherein:
a first group of the light sources is arranged in a first linear array and electrically connected to first connection wires,
a second group of the light sources is arranged in a second linear array parallel to the first linear array and electrically connected to second connection wires,
each of the light sources in the second group includes a light emitting surface having a size of 1 mm 2 or less, and
at least one of the light sources in the first group is controlled separately from at least one of the light sources in the second group.
9 . The illumination device of claim 8 , wherein the light transparent layers include particles including one or more different types of phosphors.
10 . The illumination device of claim 8 , wherein the light sources in the first group are electrically connected to a common conductor.
11 . The illumination device of claim 10 , wherein the light sources in the second group are electrically connected to the common conductor.
12 . The illumination device of claim 8 , wherein the light sources in the first group are separated from each other by a first gap.
13 . The illumination device of claim 8 , wherein the first group of the light sources and the second group of the light sources are placed on the circuit board.
14 . The illumination device of claim 13 , wherein a number of the light sources in the first group is greater than a number of the light sources in the second group.
15 . An illumination device, including:
an LED module; and
an optical system arranged in proximity to the LED module and configured to collimate light emitted by the LED module,
wherein the LED module includes:
a circuit board;
light emitting surfaces;
light transparent layers disposed on the light emitting surfaces; and
a light blocking layer disposed on the circuit board;
wherein:
a first group of the light emitting surfaces is arranged in a first linear array and electrically connected to first connection wires,
a second group of the light emitting surfaces is arranged in a second linear array parallel to the first linear array and electrically connected to second connection wires,
each of the light emitting surfaces has a size of 1 mm 2 or less, and
at least one of the light emitting surfaces in the first group is controlled separately from at least one of the light emitting surfaces in the second group.
16 . The illumination device of claim 15 , wherein the light transparent layers include particles including one or more different types of phosphors.
17 . The illumination device of claim 15 , wherein the light emitting surfaces in the first group are electrically connected to a common conductor.
18 . The illumination device of claim 17 , wherein the light emitting surfaces in the second group are electrically connected to the common conductor.
19 . The illumination device of claim 15 , wherein the light emitting surfaces in the first group are separated from each other by a first gap.
20 . The illumination device of claim 15 , wherein the first group of the light emitting surfaces and the second group of the light emitting surfaces are placed on the circuit board.