Light emitting device

A light emitting device comprising:

• a package comprising an upper portion, a lower portion, and one or more lateral portions, the package having a closed space defined by the upper portion, the lower portion, and the one or more lateral portions;
• a first light-emitting element having an upper surface and configured to have one or more emission points on the upper surface, the first light-emitting element being disposed on a mounting surface of the lower portion;
• and
• a reflecting part having:
• a first reflection surface configured to reflect light emitted upward from the one or more emission points, and
• a second reflection surface configured to reflect light that is emitted from the first light-emitting element and transmitted through the first reflection surface;
• and
• a light-receiving element disposed on the mounting surface, the light-receiving element having a light-receiving surface;
• wherein:
• the first reflection surface is located within the closed space;
• the one or more lateral portions include a first lateral portion having:
• a light incident surface on which light reflected from the first reflection surface is incident, and
• a light-transmitting portion;
• light reflected from the first reflection surface is transmitted through the light-transmitting portion to be emitted outside;
• and
• in a direction normal to the mounting surface, a first distance between a lower surface of the upper portion and the mounting surface is equal to or greater than 1.5 times a second distance between the upper surface of the first light-emitting element and a midpoint of the first reflection surface;
• the first light-emitting element and the light-receiving element are arrayed along the direction normal to the light incident surface;
• in a direction normal to the light incident surface, a distance between the first light-emitting element and the light-receiving element is smaller than a length of the first light-emitting element, and the first light-emitting element is closer to the light incident surface than the light-receiving element is to the light incident surface, and
• in a top view as viewed in a direction normal to the mounting surface, the first reflection surface overlaps the entire upper surface of the first light-emitting element, and the second reflection surface overlaps at least a portion of the light-receiving surface of the light-receiving element.

A light emitting device comprising:

• a package comprising an upper portion, a lower portion, and one or more lateral portions, wherein the package has a closed space defined by the upper portion, the lower portion, and the one or more lateral portions, and the one or more lateral portions include a first lateral portion having a light-transmitting portion;
• a first light-emitting element having an upper surface and configured to have one or more emission points on the upper surface, the first light-emitting element being disposed on a mounting surface of the lower portion;
• and
• a reflecting part having a first reflection surface configured to reflect light emitted upward from the one or more emission points;
• and
• a lens member configured to collimate light that is emitted from the first light-emitting element and transmitted through the light-transmitting portion;
• wherein:
• the first reflection surface is located within the closed space;
• light reflected from the first reflection surface is transmitted through the light-transmitting portion to be emitted outside;
• in a direction normal to the mounting surface, a first distance between a lower surface of the upper portion and the mounting surface is equal to or greater than 1.5 times a second distance between the upper surface of the first light-emitting element and a midpoint of the first reflection surface;
• in a direction normal to the mounting surface, the lens member is disposed on a same plane as the mounting surface, or on a plane located below the mounting surface;
• and
• in the direction normal to the mounting surface, a lens optical axis of the lens member passes through an intersection between the first reflection surface and an optical axis of light that is emitted from the first light-emitting element.