Surface-emitting laser device and distance measurement device having same

1 . A surface-emitting laser device comprising:

a first region in which a first subset of a plurality of first emitters are arranged;

a second region in which a second subset of the plurality of first emitters and a plurality of second emitters are arranged;

a first pad disposed outside the first region and electrically connected to the plurality of first emitters of the first and second regions; and

a second pad disposed outside the first region and electrically connected to the plurality of second emitters,

wherein an area of the second region is 30% or less of an area of the first region,

wherein the second region is disposed in a center region at least partially surrounded by the first region,

wherein a first emitter among the plurality of first emitters and a second emitter among the plurality of second emitters are separately driven,

wherein the plurality of second emitters in the second region are arranged in a first direction and a second direction orthogonal to each other,

wherein the second subset of the plurality of first emitters in the second region are arranged in the first direction and the second direction,

wherein each second emitter of the plurality of second emitters is disposed between adjacent first emitters of the second subset arranged in the first and second directions in the second region, and

wherein a pitch in the first direction between adjacent first emitters of the second subset in the second region is the same as a pitch in the second direction between adjacent second emitters of the plurality of second emitters in the second region.

2 . The surface-emitting laser device of claim 1 , wherein a number of the plurality of second emitters disposed in the second region is smaller than a number of the first subset of first emitters disposed in the first region.

3 . The surface-emitting laser device of claim 1 , wherein a pitch in the first and second directions between adjacent first emitters of the first subset in the first region is the same as a pitch in the first and second directions between adjacent second emitters of the plurality of second emitters in the second region.

4 . The surface-emitting laser device of claim 3 ,

wherein adjacent first emitters in the first region and adjacent second emitters in the second region have a same pitch.

5 . The surface-emitting laser device of claim 1 , wherein each first emitter of the plurality of first emitters and each second emitter of the plurality of second emitters includes a respective light emitting layer disposed on a respective lower first reflective layer, an oxide layer having an opening on the respective light emitting layer, a respective second reflective layer on the oxide layer, and a respective passivation layer on the respective second reflective layer,

wherein each first emitter of the plurality of first emitters includes a respective first electrode including a respective first contact portion contacted on the respective second reflective layer of the first emitter, and a respective first connection portion extending from the respective first contact portion to the respective passivation layer, and

wherein each second emitter of the plurality of second emitters includes a respective second electrode comprising a respective second contact portion contacted on the respective second reflective layer of the second emitter, and a respective second connection portion extending from the respective second contact portion to the respective passivation layer,

wherein the surface-emitting laser device includes a first insulating layer disposed between the respective first connection portions and the respective second connection portions on the second region, and

wherein the second pad is disposed on an outer portion of the first region with an area smaller than that of the first pad and is electrically connected to the plurality of second emitters.

6 . The surface-emitting laser device of claim 5 , comprising:

a first flat portion disposed between protruding portions of the second subset of first emitters and the plurality of second emitters in the second region,

wherein the protruding portions of the plurality of first and second emitters include the respective light emitting layer, the oxide layer, and the respective second reflective layer,

wherein a portion of the first flat portion is vertically overlapped with the respective first connection portion of the respective first electrode and the respective second connection portion of the respective second electrode.

7 . The surface-emitting laser device of claim 6 , further comprising: a third region in which a bridge electrode connecting the respective second electrode to the second pad is disposed between the second region and the second pad,

wherein the bridge electrode extends outside the protruding portions of a third subset of first emitters disposed in the third region, and the third region includes a second flat portion extending outside the protruding portions of the third subset of first emitters,

wherein the respective first connection portion of the respective first electrode and the bridge electrode of the respective second electrode overlap on the second flat portion in a vertical direction, and

wherein the first insulating layer is disposed between an upper surface of the respective first connection portion of the respective first electrode and a lower surface of the bridge electrode,

wherein the surface-emitting laser device includes a second insulating layer for protecting an outer portion of the bridge electrode of the first electrode.

8 . The surface-emitting laser device of claim 5 ,

wherein a total number of the plurality of second emitters is in a range of 20% to 25% of a total number of the plurality of first emitters in the first and second regions.

9 . A surface-emitting laser device comprising:

a first light emitting portion having rows O and columns P and in which a first subset of a plurality of first emitters irradiating light in an infrared region are arranged;

at least one second light emitting portion having M rows and N columns and in which a second subset of the plurality of first emitters and a plurality of second emitters for irradiating light in the infrared region are arranged,

a first pad disposed outside the first light emitting portion and electrically connected to the plurality of first emitters of the first and second light emitting portions; and

a second pad disposed outside the first light emitting portion and electrically connected to the plurality of second emitters,

wherein an area of the second light emitting portion in which the plurality of second emitters are disposed is smaller than an area of the first light emitting portion,

wherein a number of the plurality of second emitters disposed in the second light emitting portion is smaller than a number of the first subset of first emitters disposed in the first light emitting portion,

wherein the second light emitting portion is disposed in a center region at least partially surrounded by the first light emitting portion,

wherein a first emitter among the plurality of first emitters and a second emitter among the plurality of second emitters are driven separately,

wherein O, P, M, N are integers, and have a relationship of O>P>M>N,

wherein the plurality of first emitters in the first and second light emitting portions are arranged in first and second directions orthogonal to each other,

wherein the second subset of the plurality of first emitters and the plurality of second emitters in the second light emitting portion are arranged in the first and second directions,

wherein a pitch in the first and second directions between an adjacent first emitter of the second subset and a second emitter of the plurality of second emitters is smaller than a pitch in the first and second directions between adjacent first emitters of the first subset, and

wherein an angle of view of the first light emitting portion and an angle of view of the second light emitting portion are different from each other.

10 . The surface-emitting laser device of claim 9 , wherein the first light emitting portion irradiates light for a reference angle of view, and

wherein the second light emitting portion irradiates light for an angle of view smaller than the reference angle of view.

11 . The surface-emitting laser device of claim 10 , wherein the angle of view of the first light emitting portion is 70 degrees or more, and

wherein the angle of view of the second light emitting portion is 50 degrees or less.

12 . The surface-emitting laser device of claim 10 , wherein each first emitter of the plurality of first emitters and each second emitter of the plurality of second emitters are repeatedly turned on/off with a predetermined cycle, and

wherein a driving period of each first emitter of the plurality of first emitters at the reference angle of view is smaller than a driving period of each second emitter of the plurality of second emitters at the angle of view smaller than the reference angle of view.

13 . The surface-emitting laser device of claim 9 , wherein the area of the second light emitting portion is 30% or less of the area of the first light emitting portion, and

wherein the second light emitting portion is arranged in a polygonal shape with respect to a center of the first and second light emitting portions.

14 . The surface-emitting laser device of claim 9 ,

wherein the second light emitting portion has the plurality of second emitters configured for a 2× zoom magnification or more.

15 . The surface-emitting laser device of claim 9 ,

wherein a total number of the plurality of second emitters is in a range of 20% to 25% of a total number of the plurality of first emitters in the first and second light emitting portions.