IP Library › Granted Patent US 12,486,955
Granted Patent B2
US 12,486,955 · App. 18/810,717 · Granted Dec 2, 2025

Light emitting diode light string

Inventor: Chang Fu Tsai (Taichung, TW)
F21S4/10F21V23/06
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 12,486,955
App. No.
18/810,717
Granted
Dec 2, 2025
Kind
B2
Abstract

A light string includes a housing, a light cap, and a light assembly. The light cap has a cap body, an upper tip at an upper end of the cap body, and a peripheral visibility ring extending outwardly from the cap body opposite the upper tip. The light cap is coupled to and extends from the housing such that the peripheral visibility ring seats adjacent to an end of the housing proximate the light aperture. The light assembly includes a light emitting source that is positioned such that when energized, light is emitted that is visible from outside the light cap. Moreover, the peripheral visibility ring reflects light in a direction different from the light emitted by the light emitting source such that the light emitted by the light emitting source is visible when an observer is looking at a side view of the cap body.

Claims (77)

1 . A light device, comprising:

a housing with a passageway therethrough defining a light aperture and a wire aperture;

a light emitting source seated within the housing so as to extend out the light aperture;

a first conductive lead wire electrically coupled to the light emitting source that extends out from the wire aperture of the housing, and a second conductive lead wire electrically coupled to the light emitting source that extends out from the wire aperture of the housing;

a spacer plug that extends within the housing via the wire aperture so as to physically space apart the first conductive lead wire from the second conductive lead wire;

a bulb holder defined by a base having a passageway therethrough, the passageway defining a first end and a second end, wherein the housing seats inside the passageway of the bulb holder; and

a bulb portion that couples to the second end of the bulb holder so as to form a cap over the light emitting source such that when the light emitting source emits light, the emitted light shines through the bulb portion;

 wherein the bulb holder secures to the housing of a light element mechanically via a snap in ring, such that:

the housing includes an extending ring around the circumference thereof that snaps into a corresponding groove on an inside of the bulb holder, or

an inside surface of the bulb holder includes an extending ring that snaps into a groove around a circumference of the housing.

2 . The light device of claim 1 , wherein:

the bulb holder defines a base having an internal threaded portion;

the bulb portion comprises a threaded portion that threads into the internal threaded portion of the base.

3 . The light device of claim 1 , wherein the bulb portion is transparent.

4 . The light device of claim 1 , wherein the bulb portion is faceted.

5 . The light device of claim 1 , wherein the bulb portion is at least one of translucent or frosted.

6 . The light device of claim 1 , wherein the bulb holder secures to the housing of a light element via at least one of fastening or welding.

7 . The light device of claim 1 further comprising:

a filler that is transparent when solidified, the filler coupling the light assembly to the housing;

the light emitting source, when energized, emits light that is visible from outside the bulb portion;

the filler defines a light guide that directs light within the bulb portion to a peripheral visibility ring; and

the peripheral visibility ring reflects light in a direction different from the light emitted by the light emitting source such that the light emitted by the light emitting source is visible when an observer is looking at a side view of the light device.

8 . The light string of claim 7 , wherein the peripheral visibility ring comprises a reflector such that light passes through the filler functioning as a light guide to the reflector such that a brightness of light viewed from a side of the cap body is similar to a brightness of light observed when viewing the upper tip.

9 . The light string of claim 7 , wherein:

the light emitting source extends into and bonds with the filler, and at least a portion of the spacer plug extends into and bond with the filler such that the light string is impervious to water reaching the light emitting source in water up to 1 meter deep for up to 30 minutes.

10 . The light string of claim 1 , wherein:

the first conductive wire is sheathed in an insulator;

the second conductive wire is sheathed in an insulator;

the spacer plug includes a first channel and a second channel therealong;

the first channel receives the insulator of the first conductive wire; and

the second channel receives the insulator of the second conductive wire.

11 . A light string, comprising:

an electrical plug that plugs into a source of electrical power;

a wire set coupled to the electrical plug; and

a set of light string assemblies coupled to the wire set, each light string assembly comprising:

a housing with a passageway therethrough defining a light aperture and a wire aperture;

a light emitting source seated within the housing so as to extend out the light aperture;

a first conductive lead wire electrically coupled to the light emitting source that extends out from the wire aperture of the housing, and a second conductive lead wire electrically coupled to the light emitting source that extends out from the wire aperture of the housing;

a spacer plug that extends within the housing via the wire aperture so as to physically space apart the first conductive lead wire from the second conductive lead wire;

a bulb holder having a passageway therethrough, the passageway defining a first end and a second end, wherein the housing seats inside the passageway of the bulb holder; and

a bulb portion that couples to the second end of the bulb holder so as to form a cap over the light emitting source such that when the light emitting source emits light, the emitted light shines through the bulb portion;

further comprising for each light string assembly:

a filler that is transparent when solidified, the filler coupling the light assembly to the housing, wherein the light emitting source, when energized, emits light that is visible from outside the bulb portion, and the filler defines a light guide that directs light within the bulb portion to a peripheral visibility ring; and

the peripheral visibility ring reflects light in a direction different from the light emitted by the light emitting source such that the light emitted by the light emitting source is visible when an observer is looking at a side view of the light device.

12 . The light device of claim 11 , wherein:

the bulb holder defines a base having an internal threaded portion;

the bulb portion comprises a threaded portion that threads into the internal threaded portion of the base.

13 . The light device of claim 11 , wherein the bulb portion is transparent and faceted.

14 . The light device of claim 11 , wherein the bulb portion is at least one of translucent or frosted.

15 . The light device of claim 11 , wherein the bulb holder secures to the housing of a light element mechanically.

16 . The light string of claim 11 , wherein for each light string assembly:

the light emitting source extends into and bonds with a filler, and at least a portion of the spacer plug extends into and bond with the filler such that the light string is impervious to water reaching the light emitting source in water up to 1 meter deep for up to 30 minutes.

17 . A light device, comprising:

a housing with a passageway therethrough defining a light aperture and a wire aperture;

a light emitting source seated within the housing so as to extend out the light aperture;

a first conductive lead wire electrically coupled to the light emitting source that extends out from the wire aperture of the housing, and a second conductive lead wire electrically coupled to the light emitting source that extends out from the wire aperture of the housing;

a spacer plug that extends within the housing via the wire aperture so as to physically space apart the first conductive lead wire from the second conductive lead wire;

a bulb holder defined by a base having a passageway therethrough, the passageway defining a first end and a second end, wherein the housing seats inside the passageway of the bulb holder and

a bulb portion that couples to the second end of the bulb holder so as to form a cap over the light emitting source such that when the light emitting source emits light, the emitted light shines through the bulb portion;

a filler that is transparent when solidified, the filler coupling the light assembly to the housing;

the light emitting source, when energized, emits light that is visible from outside the bulb portion;

the filler defines a light guide that directs light within the bulb portion to a peripheral visibility ring; and

the peripheral visibility ring reflects light in a direction different from the light emitted by the light emitting source such that the light emitted by the light emitting source is visible when an observer is looking at a side view of the light device.

18 . The light string of claim 17 , wherein the peripheral visibility ring comprises a reflector such that light passes through the filler functioning as a light guide to the reflector such that a brightness of light viewed from a side of the cap body is similar to a brightness of light observed when viewing the upper tip.

19 . The light string of claim 17 , wherein:

the light emitting source extends into and bonds with the filler, and at least a portion of the spacer plug extends into and bond with the filler such that the light string is impervious to water reaching the light emitting source in water up to 1 meter deep for up to 30 minutes.

20 . The light device of claim 17 , wherein:

the bulb holder defines a base having an internal threaded portion;

the bulb portion comprises a threaded portion that threads into the internal threaded portion of the base.

21 . The light device of claim 17 , wherein the bulb portion is transparent.

22 . The light device of claim 17 , wherein the bulb portion is at least one of faceted, translucent or frosted.

23 . The light string of claim 17 , wherein:

the first conductive wire is sheathed in an insulator;

the second conductive wire is sheathed in an insulator;

the spacer plug includes a first channel and a second channel therealong;

the first channel receives the insulator of the first conductive wire; and

the second channel receives the insulator of the second conductive wire.

Continuity (2)
Continuation 18454929 · Aug 24, 2023
Related Publication 20250122985A1 · Apr 17, 2025
References Cited (8)
US 6719441B2 · Wong · 2004 [cited by examiner]
US 7883261B2 · Yu · 2011 [cited by examiner]
US 10533738B2 · Leung · 2020 [cited by examiner]
US 11428391B1 · Zou · 2022 [cited by examiner]
US 11499700B1 · Tsai · 2022 [cited by examiner]
US 12169063B2 · Li · 2024 [cited by examiner]
US 20150211727A1 · Loomis · 2015 [cited by examiner]
US 20220403989A1 · Leung · 2022 [cited by examiner]