TECHNICAL FIELD

Embodiments relate to a lighting module illuminating a surface light source.

Embodiments relate to a lighting device having a lighting module.

Embodiments relate to a vehicle lighting module and a lighting device having the same.

BACKGROUND ART

Conventional lighting applications include not only a vehicle lighting but also a backlight for a display and a signage.

A light emitting device, for example, a light emitting diode (LED) has advantages such as low power consumption, semi-permanent lifetime, fast response speed, safety, environmental friendliness compared to conventional light sources such as fluorescent lamps and incandescent lamps. Such an LED has been applied to various lighting devices such as various display devices, indoor lights or outdoor lights, or the like.

Recently, a lamp employing an LED has been proposed as a vehicle light source. Compared to incandescent lamps, an LED has an advantage in low power consumption. However, since an emitting angle of light emitted from an LED is small, when the LED is used as a vehicle lamp, it is required to increase a light-emitting area of a lamp using the LED.

Since a size of an LED is small, it is possible to increase a degree of freedom of design of a lamp, and the LED has economic efficiency due to the semi-permanent lifetime.

Technical Problem

An embodiment provides a lighting module having a surface light source by using a plurality of light emitting devices and reflectors.

An embodiment provides a lighting module in which light uniformity of a surface light source is improved by using a reflector reflecting light emitted from each of the plurality of light emitting devices.

An embodiment provides a lighting module in which a reflective surface of the reflector corresponding to each of the plurality of light emitting devices has an inclined surface or a curved surface.

An embodiment provides a lighting module having a reflector in which concave portions and convex portions are alternately disposed at a surface of a reflective surface, and a lighting device having the same.

An embodiment provides a lighting module having a surface light source by using a plurality of light emitting devices and reflectors.

An embodiment provides a lighting module in which light uniformity of a surface light source is improved by using a reflector reflecting light emitted from each of the plurality of light emitting devices in an upward direction.

An embodiment provides a lighting module in which a reflective surface of the reflector corresponding to each of the plurality of light emitting devices has an inclined surface or a curved surface.

An embodiment provides a lighting module having a reflector in which concave portions and convex portions are alternately disposed at a surface of a reflective surface, and a lighting device having the same.

Technical Solution

A lighting module according to an embodiment includes: a substrate; a plurality of light emitting devices disposed on the substrate; and a reflector disposed in a light-emitting direction of each of the plurality of light emitting devices on the substrate, wherein the light emitting device has an exit surface emitting light, the reflector has a reflective surface concave toward the substrate, at least a portion of which corresponds to the exit surface of the light emitting device, the reflective surface is disposed at a gradually higher height as it is farther from the light emitting device disposed in an incident direction, the reflective surface includes a plurality of convex portions arranged in a first direction and first bridge portions connecting between the plurality of convex portions, the first bridge portions are disposed along the convex portions, the first bridge portions are disposed to be lower than a straight line connecting high points of adjacent convex portions, the convex portions and the first bridge portions have the same length in a second direction orthogonal to the first direction, and an area of the convex portions may be larger than that of the first bridge portions.

A lighting module according to an embodiment includes: a substrate; a plurality of light emitting devices disposed on the substrate and having an exit surface adjacent to an upper surface of the substrate; and a reflector disposed in a light-emitting direction of each of the plurality of light emitting devices, wherein the reflector includes a reflective surface corresponding to the exit surface of each of the light emitting devices, the reflective surface includes a plurality of reflection cells arranged in a vertical direction and a bridge portion having a width smaller than a longitudinal width of the reflection cell between the plurality of reflection cells, each of the reflection cells includes convex portions adjacent to the light emitting device and concave portions disposed between the convex portions and the bridge portion, and the reflective surface has a concave negative curvature which is lower than a line segment connecting opposite edges and a gradually higher height as it is farther from the light emitting device.

A lighting device according to an embodiment includes: a substrate, a plurality of light emitting devices disposed on the substrate, and a lighting module having a reflector disposed in a light-emitting direction of the plurality of light emitting devices; a housing having a receiving space in which an upper portion is opened and in which the lighting module is disposed; and an optical member disposed on the lighting module, wherein the reflector is disposed on the substrate and includes a reflective surface corresponding to an exit surface of each of the light emitting devices, the reflective surface includes a plurality of reflection cells arranged in a vertical direction and a bridge portion having a width smaller than a longitudinal width of the reflection cell between the plurality of reflection cells, each of the reflection cells includes convex portions adjacent to the light emitting device and concave portions disposed between the convex portions and the bridge portion, and the reflective surface has a concave negative curvature which is lower than a line segment connecting opposite edges and a gradually higher height as it is farther from the light emitting device.

A lighting module according to an embodiment includes: a substrate; a plurality of light emitting devices disposed on the substrate and having an exit surface adjacent to an upper surface of the substrate; and a reflector disposed in a light-emitting direction of each of the plurality of light emitting devices, wherein the reflector includes a first reflective surface corresponding to the exit surface of each of the light emitting devices, second and third reflective surfaces disposed at opposite outer sides of the first reflective surface, the first to third reflective surfaces include a plurality of reflection cells having convex portions and concave portions, the reflector includes a first bridge portion that vertically separates the reflection cells, and a second bridge portion that horizontally separates the reflection cells, the first reflective surface has a gradually higher height as it is farther from the light emitting device, and the second and third reflective surfaces are disposed to face each other at opposite sides of the first reflective surface.

A lighting device according to an embodiment includes: a substrate, a plurality of light emitting devices on the substrate, and a lighting module having a reflector disposed in a light-emitting direction of the plurality of light emitting devices; a housing having a receiving space in which an upper portion is opened and in which the lighting module is disposed; and an optical member disposed on the lighting module, wherein the reflector is disposed on the substrate and includes a first reflective surface corresponding to an exit surface of each of the light emitting devices, second and third reflective surfaces disposed at opposite outer sides of the first reflective surface, the first to third reflective surfaces include a plurality of reflection cells having convex portions and concave portions, the reflector includes a first bridge portion that vertically separates the reflection cells, and a second bridge portion that horizontally separates the reflection cells, the first reflective surface has a gradually higher height as it is farther from the light emitting device, and the second and third reflective surfaces are disposed to face each other at opposite sides of the first reflective surface.

A lighting module according to an embodiment includes: a substrate; a plurality of light emitting devices disposed on the substrate and having an exit surface adjacent to an upper surface of the substrate; and a reflector disposed at each of the plurality of light emitting devices, wherein the reflector includes a reflective surface corresponding to the exit surface of each of the light emitting devices and having a concave curved surface or an inclined surface.

According to an embodiment, the reflective surface may include a concave portions arranged between the convex portions and the first bridge portions in a first direction, and the convex portion may include a convex curved surface.

According to an embodiment, the reflective surface may include a plurality of second bridge portions disposed in the first direction, the concave portions may include an inclined surface or a curved surface, the concave portions and the first bridge portions may have the same length in a second direction, and the plurality of second bridge portions may cross the first bridge portions.

According to an embodiment, the reflective surface may have a deeper depth as it is adjacent to a center portion, the depth may be an interval in a straight line connecting opposite edges in the first direction and opposite edges in the second direction, the first bridge portions may have a number smaller than that of the convex portions arranged in the first direction, and an interval between the first bridge portions may be the same or may be gradually narrower as it is farther from the light emitting device.

According to an embodiment, the reflective surface of the reflector may include an open region in which a lower region adjacent to the light emitting device is opened in an incident direction, wherein a length in the second direction may be greater than that in the first direction in the open region, and a length of the open region in the second direction may be greater than that of the light emitting device in the second direction.

According to an embodiment, the open region may have a recess corresponding to a center portion of the exit surface of the light emitting device, wherein the recess may be recessed deeper in an emission direction of the light emitting device, and a maximum length of the recess in the second direction may be smaller than a length of the light emitting device in the second direction.

According to an embodiment, an interval between the plurality of light emitting devices may be disposed to be longer than a bottom length of the reflector disposed between the light emitting devices, wherein an inner portion of the reflector may be spaced apart from the substrate, and the reflector may be formed of a resin material and may have a support sidewall supported at the substrate.

According to an embodiment, a portion of the reflector may connect between the reflectors or may be disposed to be overlapped with the light emitting device.

According to an embodiment, a lower end of the reflective surface may be disposed to be lower than an optical axis of the light emitting device, or may be disposed to be lower than the upper surface of the substrate.

According to an embodiment, the reflector may have a coupling portion protruding toward the substrate.

Advantageous Effects

According to a lighting module according to an embodiment, luminous intensity of a surface light source may be improved.

According to a lighting module according to an embodiment, light uniformity of a surface light source may be improved.

An embodiment may not use a molding member between reflectors, thereby reducing a loss of light.

In a lighting module and a lighting device having the same according to an embodiment, optical reliability may be improved.

In a vehicle lighting device having a lighting module according to an embodiment, reliability may be improved.

