# US 2024/0200737 A1 · Lamp string

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- Number: US 2024/0200737 A1
- Document ID: US20240200737A1
- Status: Published application
- Kind: A1
- Application number: 18/084,443
- Filed: 2022-12-19
- Published: 2024-06-20
- Earliest claimed: 2022-12-19
- Assignees: Linhai Lize Photoelectric Technology Co., Ltd.
- Applicants: Linhai Lize Photoelectric Technology Co., Ltd.
- Inventors: Chengzhuo YANG
- Web page: https://patentgrep.com/patent/US20240200737A1

## CPC

- F21S 4/10: with light sources attached to loose electric cables, e.g. Christmas tree lights
- H05B 45/10: Controlling the intensity of the light
- F21Y 2115/10: Light-emitting diodes [LED]
- F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED

## Abstract

Disclosed is a lighting string. The present application is designed to providing a lamp string with high reliability, which includes a parallel group of lamp strings, a male plug and a wire. The wire serves to connect the parallel group of lamp strings and the male plug. The parallel group of lamp strings includes a first series-connected lamp string group, a second series-connected lamp string group, . . . and an N-th series-connected lamp string group. The first to the N-th series-connected lamp string group each include a plurality of LED lamps connected by the wire in series. An adjustable resistor is disposed between the parallel group of lamp string and the male plug. The adjustable resistor has an adjustable resistance value ranging from 0 to one-third of a total resistance value of the LED lamps in the first series-connected lamp string group after being connected in series.

## Claims

### Claim 1

A lamp string comprising: a parallel group of lamp strings comprising a first series-connected lamp string group, a second series-connected lamp string group, . . . and an N-th series-connected lamp string group; a male plug; and a wire for connecting the parallel group of lamp strings and the male plug; wherein the first series-connected lamp string group, the second series-connected lamp string group, . . . and the N-th series-connected lamp string group each comprise a plurality of LED lamps connected by the wire in series.

### Claim 2 (depends on 1)

The lamp string according to claim 1, wherein an adjustable resistor is disposed between the parallel group of lamp string and the male plug.

### Claim 3 (depends on 2)

The lamp string according to claim 2, wherein the adjustable resistor has an adjustable resistance value ranging from 0 to one-third of a total resistance value of the LED lamps in the first series-connected lamp string group after being connected in series.