Light source system and light-emitting device
A light source system and a light-emitting device are provided. The light source system includes an array of light-emitting diodes, the light-emitting diodes including light-emitting diode chips; a collimating lens group located on a light path of light emitted by the array of the light-emitting diodes, the collimating lens group being configured to collimate light beams emitted by the light-emitting diode chips; and a fly-eye lens arranged on a light path of light outputted from the collimating lens group. The fly-eye lens includes micro lens units corresponding to the light-emitting diode chips, and for at least one light-emitting diode chip of the light-emitting diode chips, an image formed by each of at least one light-emitting diode chip on surfaces of the micro lens units is completely within a surface of one of the micro lens units. A ratio of side lobes is reduced, thereby improving the energy utilization rate.
1. A light source system, comprising:
an array of light-emitting diodes, wherein the light-emitting diodes comprise light-emitting diode chips;
a collimating lens group located on a light path of light emitted by the array of the light-emitting diodes, wherein the collimating lens group is configured to collimate light beams emitted by the light-emitting diode chips; and
a fly-eye lens arranged on a light path of light outputted from the collimating lens group, wherein the fly-eye lens comprises micro lens units corresponding to the light-emitting diode chips,
wherein for at least one light-emitting diode chip of the light-emitting diode chips, an image formed by each of the at least one light-emitting diode chip on surfaces of the micro lens units is completely within a surface of one of the micro lens units, and
wherein the fly-eye lens comprises a front fly-eye lens sub-unit and a back fly-eye lens sub-unit, wherein the back fly-eye lens subunit is located at a focal plane of the front fly-eye lens sub-unit.
2. The light source system according to claim 1 , wherein a respective light-emitting diode chip, from which a respective image formed by light beams on the micro lens units is completely within one of the micro lens units, accounts for greater than or equal to 30% of a number of all of the light-emitting diode chips.
3. The light source system according to claim 1 , wherein an image formed by one of the light-emitting diode chips on the surfaces of the micro lens units has a center coinciding with a center of one of the micro lens units.
4. The light source system according to claim 3 , wherein an orthographic projection of one of the micro lens units has a shape of a regular hexagon, and an image formed by one of the light-emitting diode chips on the surfaces of the micro lens units has a shape of a rectangle.
5. The light source system according to claim 4 , wherein the image formed by the one of the light-emitting diode chips on the surfaces of the one micro lens units has a short side shorter than a side of the one of the micro lens units, and a long side shorter than a distance between two parallel sides of the one of the micro lens units.
6. The light source system according to claim 4 , wherein the image formed by the one of the light-emitting diode chips on the surfaces of the one micro lens units has a short side parallel to two parallel sides of the one of the micro lens units that directly faces towards the one of the light-emitting diode chips.
7. The light source system according to claim 1 , wherein an image formed by one of the light-emitting diode chips on a surface of the back fly-eye lens sub-unit is completely within the surface of the back fly-eye lens sub-unit.
8. The light source system according to claim 1 , further comprising:
a condensing lens and a diaphragm, wherein the condensing lens is arranged on a light path of light outputted from the fly-eye lens, and the condensing lens is configured to collect and condense light beams outputted from the fly-eye lens and then guide the condensed light beams to the diaphragm.
9. A light-emitting device, comprising a light source system, wherein the light source system comprises:
an array of light-emitting diodes, wherein the light-emitting diodes comprise light-emitting diode chips;
a collimating lens group located on a light path of light emitted by the array of the light-emitting diodes, wherein the collimating lens group is configured to collimate light beams emitted by the light-emitting diode chips; and
a fly-eye lens arranged on a light path of light outputted from the collimating lens group, wherein the fly-eye lens comprises micro lens units corresponding to the light-emitting diode chips, and for at least one light-emitting diode chip of the light-emitting diode chips, an image formed by each of the at least one light-emitting diode chip on surfaces of the micro lens units is completely within a surface of one of the micro lens units,
wherein the fly-eye lens comprises a front fly-eye lens sub-unit and a back fly-eye lens sub-unit, wherein the back fly-eye lens sub-unit is located at a focal plane of the front fly-eye lens sub-unit.