CROSS-REFERENCE TO RELATED PATENT APPLICATIONS

This application is a U.S. National Stage Application under 35 U.S.C. § 371 of PCT Application No. PCT/KR2020/001155, filed Jan. 23, 2020, which claims priority to Korean Patent Application No. 10-2019-0009282, filed Jan. 24, 2019, whose entire disclosures are hereby incorporated by reference.

TECHNICAL FIELD

An embodiment of the invention relates to a lighting device of a surface light emission for improving light efficiency.

BACKGROUND ART

In general, a light emitting device, for example, a light emitting diode (LED), has 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. Such light emitting diodes are being applied to various lighting devices such as various display devices, indoor lights or outdoor lights. Recently, as a light source for a vehicle, a lamp employing a light emitting device has been proposed. Compared with an incandescent lamp, the light emitting device is advantageous in that power consumption is small. Since the light emitting device is small in size, it can increase the design freedom of the lamp and it is economical due to its semi-permanent life. Such a vehicle lighting device uses a surface light source lighting device, thereby creating a three-dimensional effect and a unique aesthetic feeling of the vehicle lamp. In the conventional rear lamp for a vehicle, the light source module is formed in a structure corresponding to the lamp bracket according to the lamp bracket structure of the curved structure. In order to form the light source module to have a curvature, a PCB substrate as thin as possible is used, and thus, there is a problem in that a durability of the module is weak. In addition, stress is applied to the PCB substrate and the light source in the process of giving the PCB substrate a curvature, so that the structure has a weaker durability. In addition, as the light source module is formed to have a curvature, the light distribution at the rear direction of the vehicle is reduced, and an additional light source is further attached to comply with the light distribution law, thereby increasing the cost.

DISCLOSURE

Technical Problem

Embodiments of the invention may provide a lighting device for preventing deterioration of durability of a light source module and a vehicle lamp including the same.

An embodiment of the invention may provide a lighting device for satisfying a rear direction and a side-rear direction of light distribution regulations of a vehicle and a vehicle lamp including the same.

Technical Solution

A lighting device according to an embodiment of the invention includes: a base member including a straight portion and a curved portion bent at one end of the straight portion, the curved portion having a curvature; a substrate including a first substrate disposed on a straight portion of the base member and a second substrate disposed parallel to the first substrate and spaced apart from the curved portion of the base member; a plurality of light sources disposed on the substrate; a resin layer including a first resin portion disposed on the first substrate and a second resin portion disposed on the curved portion of the base member to surround the second substrate; and a phosphor layer disposed on the resin layer, wherein the second resin portion includes one side contacting the first resin portion and the other side facing the one side surface, and a side surface of the second resin portion may include a curved surface.

A lighting device according to an embodiment of the invention includes: a substrate including a first substrate and a second substrate disposed outside the first substrate; a plurality of light sources disposed on each of the first substrate and the second substrate; a resin layer including a first resin portion disposed on the first substrate and a second resin portion disposed on an upper portion, an outer side, and a lower portion of the second substrate; and a phosphor layer disposed on the resin layer, wherein a upper surface of the first resin portion is parallel to the first substrate, and a surface of the second resin portion has a curved surface with respect to the upper surface of the first substrate and extends outward from the outer side surface of the second resin portion has a curved surface, and the surface of the second resin portion may include a curved surface.

The plurality of light sources includes a first light source closest to a side surface of the second resin portion, and the second resin portion includes a first point in contact with the phosphor layer in a horizontal direction of the substrate from a center of the first light source; a third point in contact with the phosphor layer and a straight line perpendicular to the substrate from the center of the first light source, and a second point in contact with the phosphor layer between the first point and the third point, the first point in contact with the second resin, the second point on the curved surface, and the third point in contact with the straight line perpendicular to the substrate at the center of the first light source, and wherein a second distance may be greater than a distance from the center of the first light source to the second point and may be smaller than a third distance from the center of the first light source to the third point.

The second substrate may be formed of a transparent material and may be electrically connected to the first substrate. In addition, the second substrate may include a grid structure including a plurality of holes and may be electrically connected to the first substrate. The second substrate may include a first substrate portion in a direction perpendicular to a side surface of the first substrate portion and a second substrate portion parallel to the side surface of the first substrate. A width of the first substrate portion may correspond to a width of the second substrate portion, and the width of the first substrate portion may be smaller than a width of the hole. The plurality of light sources may include a second light source disposed under the second substrate.

A vehicle lamp according to an embodiment of the invention includes a base member coupled to a lamp bracket of a vehicle, and including a straight portion and a curved portion bent at one end of the straight portion and having a curvature, and a lighting module disposed on the base member; a lens of a red color disposed on the lighting module, wherein the lighting module includes a first substrate disposed on the straight portion of the base member, a second substrate disposed parallel to the first substrate and spaced apart from the curved portion of the base member, a plurality of light sources disposed on the first substrate and the second substrate, a first resin portion disposed on the first substrate and the light source, a second resin portion disposed on the curved portion of the base member so as to surround the second substrate and the light source, and a phosphor layer disposed on the first resin portion and the second resin portion, wherein the second resin portion includes one side contacting the first resin portion and the other side surface disposed to face the one side surface, and the side surface of the second resin portion may include a curved surface.

Advantageous Effects

The embodiment of the invention has the effect of preventing the durability of the lighting module from being deteriorated as the substrate is horizontally arranged. By arranging the substrate horizontally, it is possible to emit light conforming to the light distribution law from the rear direction. By forming the second substrate in a transparent material or a grid structure, there is an effect of increasing the efficiency of light emitted from the side-rear direction. By additionally disposing a light source on the rear surface of the substrate, there is an effect of further increasing the efficiency of the light emitted through the side-rear direction. By using a low-concentration phosphor layer, there is an effect of reducing costs.

