JPWO2020024001A5

JPWO2020024001A5 -

Info

Publication number: JPWO2020024001A5
Application number: JP2021505341A
Authority: JP
Publication date: 2022-07-29

Claims

a housing having a front surface, a rear surface, and an interior space for receiving electronic components and a battery;
a chip-on-board (COB) assembly comprising a substrate, a matrix of individual light emitting diode (LED) chips attached to said substrate, and an outer coating covering said matrix of LED chips;
a front lens cover for protecting the COB assembly;
The front surface is curved in one direction, the COB assembly is correspondingly curved and mounted on the front surface, and the individual LED chips are curved so as to provide a collective beam angle of greater than 220 degrees. A portable light disposed around and oriented to direct light outward about said curvature.

2. The portable light of Claim 1, wherein the collective beam angle is greater than 270 degrees.

3. A portable light according to claim 1 or 2, further comprising a mount for attaching the portable light to an element.

A portable light according to any preceding claim , further comprising a USB connector configured to allow charging of said battery.

A portable light according to any preceding claim , wherein the front lens cover is curved to accommodate the curvature of the front surface and the COB assembly.

A portable light according to any preceding claim , wherein the COB assembly comprises a semiconducting or thermally conductive material and the substrate is configured to act as a heat sink.

A portable light according to any one of the preceding claims , wherein said substrate is resiliently bendable to form and maintain a curved shape of said COB assembly.

A portable light according to any preceding claim, wherein the substrate is flexible so as to be configured to form a curved shape of the COB assembly.

The substrate includes a first surface including a thermally conductive dielectric layer, a copper circuit layer overlying the thermally conductive dielectric layer, and an insulating coating overlying a matrix of copper pads of the copper circuit layer. A portable light as claimed in any one of the preceding claims , coated on the first surface in an exposed manner.

10. The portable light of claim 9 , wherein each of said LED chips includes a die connected to a respective copper pad with a conductive adhesive, and wire bonds connect said die to adjacent copper pads.

11. The portable light of claim 10 , wherein said curvature of said COB assembly is substantially perpendicular to the direction of said wire bonds so that said wire bonds do not bend.

10. The portable of claim 9 , wherein each of said LED chips includes one or more electrical contacts on the base of said LED chips configured to connect directly to respective copper pads via solder. light.

A portable light according to any one of the preceding claims , wherein said curvature of said front face and said COB assembly is such that it extends at an angle between 90° and 360°.

14. The portable light of claim 13 , wherein said curvature of said front face and said COB assembly are such that they extend at an angle between 120° and 220°.

A portable light according to any preceding claim , wherein the curvature of the front surface and the COB assembly extends at an angle of approximately 180°.

A portable light according to any preceding claim , wherein the rear surface is generally curved so as to be configured to sit on a tubular frame member of a bicycle.

A portable light as claimed in any preceding claim, wherein the rear surface is substantially flat.

a housing defining a space for receiving the electronic components and the battery;
a chip-on-board (COB) assembly comprising a substrate, a plurality of individual light emitting diodes (LEDs) attached to said substrate, and an outer coating covering said plurality of LEDs;
a front lens cover for protecting the COB assembly;
The COB assembly is curved and positioned within a housing, with individual LEDs positioned around the curve to provide a collective beam angle of greater than 220 degrees, directing light outward around the curve. A portable light that is oriented to point at.

An apparatus for bending a chip-on-board (COB) assembly, comprising:
a guide having a first surface for holding the flat COB assembly with the first side of the COB assembly facing outwardly with respect to the surface of the guide;
two opposing actuators movable inwardly of each other;
two opposing clamping devices, each pivotally attached to an inner end of a respective actuator and configured to clamp opposing perimeters of a COB assembly disposed within said guide;
a forming die positioned below or behind the guide such that the COB assembly is positioned above or in front of the forming die, the forming die having a curved engagement surface;
The forming die can be pressed against a second side of the COB assembly and actuated to bend the COB assembly centrally in a first direction, whereby the actuator causes the COB assembly to A device wherein as it bends, it moves inwardly with a clamped edge of said COB assembly and said clamping device rotates as said edge moves.

A method of bending a chip-on-board (COB) assembly, the COB assembly having a substrate having a matrix of individual light-emitting diode (LED) chips attached to a first surface, the method comprising:
placing at least one COB assembly within a guide, with the first surface arranged to face outward in a first direction;
clamping two opposing peripheral edges in respective clamping devices;
activating a forming die having a curved engaging surface, said forming die in said first direction to bend said COB assembly so that said COB assembly assumes the shape of said engaging surface; moving an engagement surface toward a second surface of the COB assembly;
As the forming die is pressed against the second surface, the clamping devices move inwardly toward one another, and as the COB assembly bends, the first clamping device moves to follow the edges of the COB assembly. A method that pivots toward a direction.