Flip-chip side emitting LED with top reflector, peripheral wavelength conversion element, and optical element between light emitting element and lightguide element

A side-emitting device, comprising:

• a light emitting element having a light emitting surface that emits light in an upward direction,
• a first optical element situated above the light emitting element,
• an interface between the light emitting element and the first optical element,
• one or more reflective elements situated on sidewalls of the first optical element,
• a second optical element situated above the first optical element, the second optical element having a same or lower index of refraction than the first optical element, the second optical element comprising a non-wavelength-converting lightguide element that receives the light emitted from the light emitting element through the first optical element,
• one or more top reflectors situated above the lightguide element that serve to direct the light in the lightguide element to exit from one or more side surfaces of the lightguide element, and
• one or more wavelength conversion elements situated on the one or more side surfaces of the lightguide element, which receive and convert some or all of the light emitted by the lightguide element to a different wavelength.

A method of forming a side-emitting device, comprising:

• providing a light emitting element having a light emitting surface that emits light in an upward direction,
• providing a non-wavelength-converting lightguide element that is situated above the light emitting surface,
• providing top reflectors situated above the lightguide element that serve to direct light in the lightguide element to exit one or more first side surfaces of the lightguide element, the top reflectors comprising a specular reflector situated above the lightguide element and a diffusing reflector is situated above the specular reflector, and
• providing one or more wavelength conversion elements situated at the one or more first side surfaces of the lightguide element to receive and convert some or all of the light emitted by the lightguide element to a different wavelength.

A method of forming a side-emitting device comprising:

• providing a light emitting element having a light emitting surface that emits light in an upward direction,
• providing a first optical element situated above the light emitting element, an interface existing between the light emitting element and the first optical element,
• providing one or more reflective elements situated on sidewalls of the first optical element,
• providing a second optical element situated above the first optical element, the second optical element having a same or lower index of refraction than the first optical element, the second optical element comprising a non-wavelength-converting lightguide element that receives the light emitted from the light emitting element through the first optical element,
• providing one or more top reflectors situated above the lightguide element that serve to direct light in the lightguide element to exit one or more side surfaces of the lightguide element, and
• providing one or more wavelength conversion elements situated on the one or more side surfaces of the lightguide element to receive and convert some or all of the light emitted by the lightguide element to a different wavelength.