EP-4737790-A1 - LIGHTING DEVICE AND LAMP

EP4737790A1EP 4737790 A1EP4737790 A1EP 4737790A1EP-4737790-A1

Abstract

A lighting device disclosed in an embodiment of the invention comprises: a support plate having a concave receiving portion on an upper portion; a circuit board disposed on the receiving portion of the support plate; a plurality of pads disposed on one side of the circuit board; a light source portion disposed on the support plate and having a light emitting device and a plurality of bonding pads; a plurality of connection members respectively connecting the plurality of pads to the plurality of bonding pads; and a molding portion covering the plurality of connection members, the plurality of pads, and the plurality of bonding pads, wherein an outer line of the molding portion has first to fourth side portions, the first side portion of the molding portion extends in a first direction along a region between an upper surface of the light emitting device and an upper surface of the plurality of bonding pads on the light source portion, a second side portion of the molding portion extends in the first direction along an outer side of the plurality of pads on the circuit board, and a third side portion and a fourth side portion of the molding portion extend in a second direction orthogonal to the first direction from both ends of the first and second side portions, and may include a convex curve and a concave curve.

Inventors

LEE, JUNG HO
LEE, HEE JUNG
KIM, WON JIN

Assignees

LG INNOTEK CO. LTD

Dates

Publication Date: 20260506
Application Date: 20240628

Claims (11)

A lighting device comprising: a support plate having a concave receiving portion on an upper portion thereof; a circuit board disposed on the receiving portion of the support plate; a plurality of pads disposed on one side of the circuit board; a light source portion disposed on the support plate and including a light emitting device and a plurality of bonding pads; a plurality of connection members respectively connecting the plurality of pads to the plurality of bonding pads; and a molding portion covering the plurality of connection members, the plurality of pads, and the plurality of bonding pads, wherein an outer line of the molding portion has first to fourth side portions, wherein the first side portion of the molding portion extends in a first direction along a region between an upper surface of the light emitting device and upper surfaces of the plurality of bonding pads of the light source portion, wherein the second side portion of the molding portion extends in the first direction along an outer side of the plurality of pads on the circuit board, and wherein the third and fourth side portions of the molding portion extend from both ends of the first and second side portions in a second direction perpendicular to the first direction and have a convex curve and a concave curve.
The lighting device of claim 1, wherein the plurality of pads includes a first pad and a second pad adjacent to the light source portion, wherein the plurality of bonding pads includes a first bonding pad and a second bonding pad adjacent to the circuit board, wherein the plurality of connection members includes a first connection member connecting the first pad and the first bonding pad, and a second connection member connecting the second pad and the second bonding pad, and wherein a highest point of the molding portion is disposed higher than highest points of the first and second connection members with respect to an upper surface of the circuit board.
The lighting device of claim 2, wherein the highest point of the molding portion is disposed on a region between the circuit board and the light source portion.
The lighting device of claim 3, wherein highest points of the first and second connection members are disposed on a region between the circuit board and the light source portion.
The lighting device of any one of claims 1 to 4, further comprising: an adhesive member disposed between the light source portion and the support plate, wherein the third and fourth side portions of the molding portion protrude further outward than the adhesive member disposed on both sides of the light source portion in the first direction.
The lighting device of claim 5, wherein the first side portion of the molding portion has a straight shape or a concave shape along the plurality of bonding pads of the light source portion.
The lighting device of claim 7, wherein a distance between the first side portion of the molding portion and the light emitting device gradually increases toward a region between the plurality of bonding pads on both sides of the light source portion in the first direction.
The lighting device of claim 6, wherein one region of the third side portion and one region of the fourth side portion have convex curved portions on both sides of the light source portion.
The lighting device of any one of claims 2 to 4, wherein each of the first and second connection members includes a first end bonded to the first and second bonding pads, a second end bonded to the first and second pads, and an intermediate wire portion connecting the first end and the second end, and wherein a distance between the second ends of the first and second connection members is greater than a distance between the first ends thereof.
The lighting device of any one of claims 1 to 4, wherein each of the plurality of connection members is a ribbon wire having a width greater than twice a thickness thereof.
A lamp comprising: a lighting device emitting white light, a light guide module or a reflector disposed on the lighting device, wherein the lighting device is a lighting device according to any one of claims 1 to 4.

Description

[Technical Field] An embodiment of the invention relates to a lighting device and a lamp. [Background Art] Lighting applications include vehicle lights as well as backlights for displays and signs. Light emitting device, such as light emitting diode (LED), have advantages such as low power consumption, semi-permanent life, fast response speed, safety, and environmental friendliness compared to conventional light sources such as fluorescent lamps and incandescent lamps. These light emitting diodes are applied to various display devices, various lighting devices such as indoor or outdoor lights. Recently, as a vehicle light source, a lamp employing a light emitting diode has been proposed. Compared with incandescent lamps, light emitting diodes are advantageous in that power consumption is small. However, since an emission angle of light emitted from the light emitting diode is small, when the light emitting diode is used as a vehicle lamp, there is a demand for increasing the light emitting area of the lamp using the light emitting diode. [Disclosure] [Technical Problem] An embodiment of the invention provides a lighting module and a lighting device having a member that secures at least a portion of a connection member that electrically connects a light source portion and a circuit board. An embodiment of the invention provides a lighting module and a lighting device having a member that secures a portion or all of a plurality of connection members that electrically connects a light source portion and a circuit board. An embodiment of the invention provides a lighting module and a lighting device having a member that secures a position of a portion of one or a plurality of wires on at least one region of an upper surface of a circuit board or an upper surface of a support plate. An embodiment of the invention provides a lighting device and a lamp or an automobile lamp having the same. [Technical Solution] The lighting device according to an embodiment of an invention comprises: a support plate having a concave receiving portion on an upper portion thereof; a circuit board disposed on the receiving portion of the support plate; a plurality of pads disposed on one side of the circuit board; a light source portion disposed on the support plate and having a light emitting device and a plurality of bonding pads; a plurality of connection members respectively connecting the plurality of pads to the plurality of bonding pads; and a molding portion covering the plurality of connection members, the plurality of pads, and the plurality of bonding pads, wherein an outer line of the molding portion has first to fourth side portions, the first side portion of the molding portion extends in a first direction along a region between an upper surface of the light emitting device and an upper surface of the plurality of bonding pads on the light source portion, a second side portion of the molding portion extends in the first direction along an outer side of the plurality of pads on the circuit board, and a third side portion and the fourth side portion of the molding portion extend in a second direction orthogonal to the first direction from both ends of the first and second sides, and may include a convex curve and a concave curve. According to an embodiment of the invention, the plurality of pads include a first pad and a second pad adjacent to the light source portion, the plurality of bonding pads include a first bonding pad and a second bonding pad adjacent to the circuit board, the plurality of connection members include a first connection member connecting the first pad and the first bonding pad, and a second connection member connecting the second pad and the second bonding pad, and the uppermost end of the molding portion may be positioned higher than the highest points of the first and second connection members based on the upper surface of the circuit board. According to an embodiment of the invention, the highest point of the molding portion may be positioned on a region between the circuit board and the light source portion. The highest points of the first and second connection members may be positioned on a region between the circuit board and the light source portion. The the invention includes an adhesive member disposed between the light source portion and the support plate, and third and fourth side portions of the molding portion may protrude further outward than the adhesive member disposed on both sides of the light source portion in the first direction. According to an embodiment of the invention, the first side portion of the molding portion may have a linear shape or a concave shape along the plurality of bonding pads on the light source portion. One side region of the third side portion and one side region of the fourth side portion may have convex curved regions on both sides of the light source portion. A distance between the first side portion of the molding portion and the light emitting device m