Light converting optical structure and lighting device utilizing the same

A lighting device, comprising:

• a printed circuit board;
• a light source, disposed on the printed circuit board;
• a reflective structure, disposed on the printed circuit board on an area out of the light source;
• and
• a light converting optical structure, comprising a light traveling layer disposed on the reflective structure, the light traveling layer having a top surface and a bottom surface opposite to the top surface, the top surface being formed with a top recess, and the bottom surface being formed with a bottom recess aligned with the top recess for accommodating the light source, wherein the top recess defines a surface which has a slope being gradually varied.

A lighting device, comprising:

• a printed circuit board;
• a light source, disposed on the printed circuit board;
• a light accommodating optical structure disposed on the printed circuit board, the light accommodating optical structure comprising a light accommodating layer, the accommodating layer being formed with a through hole, which has a top opening and a bottom opening larger than the top opening, wherein the light source is accommodated within the through hole and located at the bottom opening;
• and
• a light converting optical structure, comprising a light traveling layer disposed on the light accommodating layer, the light traveling layer having a top surface and a bottom surface opposite to the top surface, the top surface being formed with a top recess, and the bottom surface being formed with a bottom recess aligned with the top recess and the through hole, wherein the top recess defines a surface which has a slope being gradually varied.