JP2005123588A5

JP2005123588A5 -

Info

Publication number: JP2005123588A5
Application number: JP2004246944A
Authority: JP
Filing date: 2004-08-26
Publication date: 2008-03-21
Anticipated expiration: 2024-08-26

Claims

At least one LED element mounted on the main surface of the substrate;
A light wavelength conversion unit that includes a fluorescent material that converts light emitted from the LED element into light having a wavelength longer than the wavelength of the light, and covers at least a part of the LED element;
An LED light source comprising:
The side surface of the light wavelength conversion unit has at least one concave curved surface portion ,
The concavely curved surface is an LED light source in which a surface of a side surface of the light wavelength conversion unit is a concavely curved surface that is recessed in the direction of the LED element .

The LED light source of Claim 1 provided with the translucent member which covers at least one part of the said light wavelength conversion part.

A reflective surface spaced from the side surface of the light wavelength conversion unit;
A translucent member covering at least a part of the light wavelength conversion unit;
With
The LED light source according to claim 2, wherein a refractive index of the translucent member is different from a refractive index of the light wavelength conversion unit.

The LED light source according to claim 3, wherein a refractive index of the translucent member is larger than a refractive index of the light wavelength conversion unit.

The translucent member is made of resin,
The LED light source according to claim 4, wherein the translucent member fills a gap between the side surface of the light wavelength conversion unit and the reflection surface.

The LED light source according to claim 3, wherein the translucent member functions as a lens.

The LED light source according to claim 1, wherein the light wavelength conversion unit is formed of a resin containing the fluorescent material.

The cross section of the light wavelength conversion unit cut so as to cross the recess on the side surface of the light wavelength conversion unit by a plane perpendicular to the main surface of the substrate has an outer shape including a curve corresponding to the recess,
The LED according to any one of claims 1 to 7, wherein a value R / t obtained by dividing a curvature radius R of the curve by a thickness t of the light wavelength conversion unit is in a range of 0.5 or more and 8.5 or less. light source.

The value d / t obtained by dividing the depth d of the concave portion on the side surface of the light wavelength conversion portion by the thickness t of the light wavelength conversion portion is in the range of 0.03 or more and 0.5 or less. 6. The LED light source according to any one of 6.

The LED light source according to claim 9, wherein a depth d of the concave portion on the side surface of the light wavelength conversion unit is in a range of 0.01 mm or more and 0.17 mm or less.

The LED light source according to claim 1, wherein the light wavelength conversion unit has a substantially cylindrical shape, and the side surface of the substantially cylindrical shape forms the concave curved surface portion.

The LED light source according to claim 1, wherein the light wavelength conversion unit has a substantially truncated cone shape, and a side surface of the substantially truncated cone shape forms the concave curved surface portion.

A plurality of LED elements arranged on the main surface of the substrate;
A plurality of reflective surfaces surrounding each side surface of the plurality of LED elements;
A plurality of light wavelength converters each including a fluorescent material that converts light emitted from the LED element into light having a wavelength longer than the wavelength of the light, each covering a corresponding LED element;
A plurality of translucent members each covering a corresponding light wavelength converter;
An LED light source comprising:
The side surface of each light wavelength converter has at least one concave curved surface portion,
The translucent member is an LED light source that fills a gap between the side surface of the light wavelength conversion unit and the reflection surface.

A printing plate used for forming a resin pattern on a substrate,
A plate-like member having an upper surface, a lower surface, and at least one through hole connecting the upper surface and the lower surface;
The printing plate, wherein an inner wall surface of the through hole in the plate-like member forms a convex curved surface protruding toward the center of the through hole while at least the resin filled in the through hole is cured.

The printing plate according to claim 14, wherein the plate-like member is formed of a material whose shape changes flexibly according to an external force.

The printing plate according to claim 15, wherein the plate-like member is formed of an elastic body.

The printing plate according to claim 15 or 16, further comprising a plate in contact with at least one of an upper surface and a lower surface of the plate-like member.

A step (A) of mounting at least one LED element on the main surface of the substrate; and a fluorescent material that converts light emitted from the LED element into light having a wavelength longer than the wavelength of the light, A step (B) of forming an optical wavelength conversion part covering at least a part on the substrate, and a manufacturing method of an LED light source,
The said process (B) is a manufacturing method of an LED light source including the process of forming at least 1 concave curved surface part in the side surface of the said light wavelength conversion part.

The step (B)
A step (b1) of forming an isolated pattern of the material constituting the light wavelength conversion portion on the substrate;
A step (b2) of deforming a side surface of the isolated pattern to form the concave curved surface portion;
The manufacturing method of Claim 18 containing this.