KR20160139274A - Lighting package and Automobile lamp using the same - Google Patents

Abstract

An embodiment of the present invention provides a lighting device which comprises: a light emitting unit including a light emitting element and a first reflective layer mounted on a substrate; and a light collecting unit including a second reflective layer for reflecting a part of light emitted from the light emitting element, and transmitting a part of the light emitted from the light emitting element, and collecting a part of the light emitting from the light emitting element passing through the second reflective layer. The light emitting unit and the light collecting unit are arranged to be separated from each other. A hot spot can be reduced since the light is collected especially in a lens installed in an upper part and the reflective layer.

Description

TECHNICAL FIELD [0001] The present invention relates to a lighting apparatus and a vehicle lamp including the lighting apparatus.

Embodiments of the present invention are directed to an illumination device capable of reducing hot spots that can reduce hot spots while increasing front brightness.

The lighting unit using various light sources used in electronic devices is implemented in such a way as to increase the light efficiency by using a suitable light source according to the characteristics of each electronic device.

BACKGROUND OF THE INVENTION [0002] Lighting units used in such electronic apparatuses are classified into backlight units applied to flat panel displays, interior lights used in indoor environments, headlights, fog lights, retracted lights, car lights, number lights, tail lights, An indicator lamp, an emergency flashing indicator, or an indoor lighting installed in a vehicle.

However, in most of these lights, a member of a light guide plate or the like, which efficiently transmits light that provides light, is used to approach from the aspect of the luminance of the surface light source. However, in a vehicle lighting apparatus implemented as a conventional surface light source, It is not adjustable and when the degree of light condensation is reduced, application as a light source is limited.

Furthermore, there is a problem that a hot spot, which is a deterioration phenomenon of an emitting portion, is generated due to strong light intensity of an optical device such as an LED as a point light source applied to a vehicle lamp.

The embodiments of the present invention have been made to solve the above-mentioned problems. In particular, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a light- It is possible to realize an illumination device capable of efficiently controlling the light distribution in the illumination of the surface light emission type.

As a means for solving the above-mentioned problems, an embodiment of the present invention provides a light emitting device comprising: a light emitting unit including a light emitting element mounted on a substrate and a first reflective layer; And a condensing unit for condensing a part of emitted light passing through the second reflective layer, wherein the light emitting unit and the condensing unit are spaced apart from each other Thereby providing a lighting device to be disposed.

Particularly, in the case of implementing a lamp for a vehicle using the above-described illuminating device, a mesh-shaped reflector and a lens portion are arrayed in a one-to-one manner so that light reflected by the reflective layer moves laterally, , It is possible to provide a light-converging vehicle lamp in which the passed light is reduced in hotspot so that it can be condensed by the curvature of a certain lens.

According to the embodiment of the present invention, the mesh-shaped reflector and the lens are arrayed one to one, the light reflected from the reflection layer moves laterally to allow light to pass through only the portion where the opening is formed, So that the light can be condensed by the curvature, so that the hot spot can be reduced and condensed so that it can be made to conform to the front luminous intensity standard.

1 is a view schematically showing a vehicle lamp to which a lighting device according to an embodiment of the present invention is applied.
FIG. 2 is a cross-sectional view schematically showing a light-collecting vehicle lamp in which a hot spot is reduced according to an embodiment of the present invention.
FIG. 3 is a front view schematically showing a light-collecting vehicle lamp in which a hot spot is reduced according to an embodiment of the present invention.

Hereinafter, the configuration and operation according to the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description with reference to the accompanying drawings, the same reference numerals denote the same elements regardless of the reference numerals, and redundant description thereof will be omitted. The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

FIG. 1 is a view schematically showing a vehicle lamp to which a lighting apparatus according to an embodiment of the present invention is applied, and FIG. 2 is a cross-sectional view schematically showing a condensing vehicle lamp in which a hot spot is reduced according to an embodiment of the present invention.

The illuminating device according to the embodiment of the present invention can realize surface light emission and is capable of easily adjusting a desired brightness standard by applying to a device requiring a light distribution rule such as a vehicle lamp while reducing hot spot phenomenon by a light emitting device Lt; / RTI >

1 shows a structure in which a housing H of a vehicle lamp and a plurality of mounting regions in which the light emitting device package 1 is mounted are provided. A reflector (R) structure that reflects the light emitted from the light emitting device package (1) and guides the light forward can be disposed on the outer surface of the mounting area. When a point light source such as an LED is used in the structure of such a lamp, it is difficult to control the light intensity for satisfying the hot spot phenomenon due to the strong light and the light distribution condition, and since the light in the form of a point light source is emitted, ).

2, the light emitting device according to the embodiment of the present invention includes a light emitting unit A including the light emitting device 130 and the first reflective layer 120 mounted on the substrate 110, A second reflective layer 150 that reflects part of the emitted light of the light emitting device 130 and transmits a part of the emitted light and a condensing unit B that collects a part of emitted light passed through the second reflective layer 150 . In this case, the light-emitting unit A and the light-collecting unit B may be spaced apart from each other.

As shown in FIG. 2, the light emitting unit A includes a light emitting device 130 that emits light. The light emitting device 130 includes an optical device that emits light, and includes various light sources For example, a solid light emitting device can be applied. The solid state light emitting device may be any one selected from an LED, an OLED, a laser diode (LD), a laser, and a VCSEL. An embodiment of the present invention will be described by taking an LED as a light emitting element as an example.

The substrate 110 is a structure for mounting the light emitting device 130, and may be a printed circuit board, for example. In this case, the printed circuit board refers to a substrate on which a circuit pattern is formed, that is, a PCB. In the present invention, the printed circuit board may be a transparent printed circuit board. Do. In the case of the conventional lighting device, it is opaque by using the FR4 printed circuit board. However, by using the transparent material, in particular the transparent PET printed circuit board, as in the present invention, it becomes possible to provide a transparent lighting device. In addition, in the present invention, a flexible printed circuit board (FPCB) can be used to secure certain flexibility. Of course, the substrate may be a resin-based printed circuit board (PCB), a metal core PCB, a ceramic PCB, or an FR-4 substrate.

Particularly, it is preferable that a first reflective layer 120 is disposed on the substrate 110. The first reflective layer 120 is formed on an upper surface of the substrate 110, . The first reflective layer 120 is formed of a material having a high reflection efficiency so that the light reflected by the second reflective layer of the upper condensing unit among the outgoing light emitted from the light source 130 is again reflected again and moved to the upper and side portions Function. That is, as shown in FIG. 2, when some light a1 in the outgoing light is reflected by the upper second reflective layer, the light reflected from the reflective layer moves laterally and light can pass through only the portion where the opening is formed So that it is possible to increase the light utilization efficiency and realize a surface light emission of a sufficient area even when a single optical device is applied to realize uniform surface light emission of the entire package.

The first reflective layer 120 may be formed in the form of a sheet film such as Ag. The first reflective layer 120 may be formed of a synthetic resin containing dispersed white pigment in order to realize light reflection characteristics and light scattering properties. have. Examples of the white pigment include titanium oxide, aluminum oxide, zinc oxide, lead carbonate, barium sulfate, calcium carbonate and the like. As the synthetic resin, polyethyleneterephthalate, polyethylene naphthalate, acrylic resin, colicarbonate, polystyrene, polyolefin , Cellulosic acid acetate, weather-resistant vinyl chloride, and the like can be used, but the present invention is not limited thereto.

The light collecting unit B is spaced apart from the light emitting unit A and transmits a part b1 of the light emitted from the light emitting unit 130 to condense the light, A part a1 of the light reflected by the reflective layer 150 is repeatedly reflected by the first reflective layer 120 to move and diffuse the light along the light emitting surface of the entire illumination device, Condensing part of the light passing through the transmission part 152 formed in the light guide plate 150.

The condensing unit B includes the second reflective layer 150 on one side of the light transmissive substrate 140 and the condensing lens unit 160 on the other side of the light transmissive substrate 140. In this case, the condensing lens unit 160 can be realized by arranging a plurality of convex lenses so that light passing through the light transmitting substrate 140 can be condensed.

2 and 3, the second reflective layer 150 may be formed as a sheet structure having a reflective portion 151 and a transmissive portion 152. The second reflective layer 150 may be formed of the same material as the first reflective layer 110, and may be formed in a sheet or plate shape. In order to realize the characteristics of reflecting light and dispersing light, And a synthetic resin dispersedly containing a white pigment. The structure of the second reflective layer 150 may be variously modified. In the present embodiment, a reflective sheet structure having a plurality of openings, that is, a structure in which the openings are formed in a mesh shape will be described as an example. The opening serves as a transmitting portion 152, and the shape of the opening 152 may be circular, elliptical, or polygonal.

That is, the light emitted from the light emitting device 130 is controlled to be transmitted only through the transmissive portion 152. In this case, the reflective portion reflects the emitted light, thereby preventing the concentration of light and significantly reducing the hot spot phenomenon Let's do it. To this end, the reflective portion may be coated with a material including any one of TiO ₂ , CaCo ₃ , BaSo 4, Al ₂ O _{3 ,} Silicon, and PS. Alternatively, the reflective layer itself may be formed of a reflective base material including any one of Al, PC, PP, ABS and PBT, and an opening may be formed in the reflective base.

In order to prevent the concentration of the light intensity of the light emitting device 130 through the arrangement of the reflective portion 151 as described above to efficiently control the hot spot and to allow a part of the light to be scattered and reflected in the lateral direction, In the embodiment, as shown in FIG. 2, the center axis X1 of the reflective portion 151 and the light emitting element 130 may be partially overlapped with each other.

Further, the reflective portion 151 can be disposed at a position corresponding to the boundary portion of the plurality of convex lenses, so that efficient condensation can be realized through the adjacent transmissive portion 152. In order to achieve this, the width of the transmissive portion 152 may be narrower than the width of the convex lens, more preferably, the transmissive portion 152 may be arranged so that the central axis Y of the convex lens coincides with the width of the convex lens. do. This is to realize an effect that the light passing through the transmission portion can be efficiently condensed to the center of the lens.

 The lens unit 30 is located on the upper surface of the light-transmissive substrate 140 and is capable of condensing and emitting light that has passed through the transmissive portion 152 of the second reflective layer 150, The light emitted from the light source 150 passes through the bottom surface of the light guide plate 150 and is condensed by the curvature of the lens. Accordingly, the unit lens of the lens unit 160 is self-aligned with the transmissive unit 152 so as to have a 1: 1 structure, and the angle of the light focused by the curvature and the refractive index of the lens can be adjusted.

In addition, the light-transmitting substrate 140 in the exemplary embodiment of the present invention may be formed of a material such as polystyrene (PS), polymethyl methacrylate (PMMA), cyclic olefin copoly (COC), polyethylene terephthalate (PET) Such as high-permeability plastics, which can perform light transmission and diffusion functions.

The light emitting device package according to the embodiment of the present invention can be applied to a light collecting vehicle lamp in which a reflector and a condenser lens are mixed to reduce a hot spot that can reduce a hot spot while enhancing front luminance.

Further, the light emitting device package according to the embodiment of the present invention is applicable to various lamp devices requiring control of hot spots and light distribution distribution, such as a vehicle lamp, a household lighting device, and an industrial lighting device. For example, when it is applied to a vehicle lamp, it can be applied to a headlight, a vehicle interior light, a door scarf, a rear light, and the like. In addition, the illumination device of the present invention can be applied to a backlight unit field applied to a liquid crystal display device, and can be applied to all lighting-related fields that are currently developed, commercialized, or can be implemented according to future technology development.

In the foregoing detailed description of the present invention, specific examples have been described. However, various modifications are possible within the scope of the present invention. The technical idea of the present invention should not be limited to the embodiments of the present invention but should be determined by the equivalents of the claims and the claims.

110: substrate
120: first reflective layer
130; Light emitting element
140: light transmitting substrate
150: Second reflective layer
160:
A: Light emitting unit
B: condensing unit

Claims (9)

A light emitting unit including a light emitting element mounted on a substrate and a first reflective layer;
And a condensing unit condensing a part of the outgoing light passing through the second reflective layer,
Wherein the light-emitting unit and the light-collecting unit are spaced apart from each other.
The method according to claim 1,
The light-
The second reflective layer is disposed on one surface of the light-transmitting substrate,
And a condenser lens portion is disposed on the other surface opposite to the one surface.
The method of claim 2,
Wherein the condensing lens unit includes a plurality of convex lenses.
The method of claim 3,
Wherein the second reflective layer
And a reflective portion and a transmissive portion.
The method of claim 4,
And the center of the transmissive portion and the center of the convex lens coincide with each other.
The method of claim 4,
Wherein the width of the transmissive portion is narrower than the width of the convex lens.
The method of claim 4,
And the reflective portion is disposed at a position corresponding to a boundary portion of the plurality of convex lenses.
The method of claim 4,
The light-
And the central axis of the reflective portion and the central axis of the light emitting element partially overlap each other.
A housing having a plurality of lighting device mounting areas;
A reflector disposed on the illumination device mounting area and reflecting outgoing light; And
A lighting device according to any one of claims 1 to 8 arranged in each of the lighting device mounting areas;
.

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