KR20160139234A - Lighting device and Automobile lamp using the same - Google Patents

Abstract

An embodiment of the present invention provides a lighting device which comprises: a first module having a first light emitting element received inside a first light guide unit; and a second module connected to one end of the first module, and having a second light emitting element arranged outside a second light guide unit. A light exit surface of the first light guide unit and an extension line of a light exist surface of the second light guide unit forms a tilt angle (1). By coupling the first module including a direct type LED and the second module including an edge type LED, a hot spot can be reduced while realizing a curve structure arrangement.

Description

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

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.

Further, most of the conventional illumination is limited to a package structure of a constant point light source type, and it is also difficult to arrange the curvature in a limited space.

Embodiments of the present invention are contrived to solve the above-mentioned problems, and it is an object of the present invention to provide a light emitting diode display capable of realizing a layout of a curved structure by combining a first module including a direct type LED and a second module including an edge type LED Of course, it is possible to provide lighting devices and vehicle lamps capable of reducing hot spots.

As a means for solving the above-mentioned problems, in an embodiment of the present invention, a first module for accommodating a first light emitting element in a first light guide part; And a second module connected to one end of the first module and having a second light emitting device disposed outside the second light guide part, wherein the light output surface of the first light guide part and the light exit surface of the second light guide part So that an extension line of the surface forms an inclination angle? 1.

According to the embodiment of the present invention, it is possible to provide a daytime running lamp (DRL) or a position lamp satisfying the legal luminous intensity regulation while reducing the direct light or hotspot emitted from the LED, and applying silicone to the LED to form a light guide plate So that it is possible to conform to the heat resistance standard of the front lamp.

1 is a schematic view of a vehicle lamp in which an illumination device according to an embodiment of the present invention can be disposed.
2 is a schematic view illustrating a point light source vehicle lamp in which a hot spot is reduced according to an embodiment of the present invention.
3 is a side cross-sectional view schematically illustrating a first module of a point light source vehicle lamp that reduces a hot spot according to an embodiment of the present invention.
FIG. 4 schematically shows a second module of a point light source vehicle lamp that reduces a hot spot according to an embodiment of the present invention. Fig.
5 is a front view schematically showing a diverging member included in a first module of a point light source 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 schematic view of a vehicle lamp in which a lighting apparatus according to an embodiment of the present invention can be arranged, FIG. 2 is a view schematically showing a point light source vehicle lamp in which a hot spot is reduced according to an embodiment of the present invention to be.

The light emitting package according to an embodiment of the present invention can realize surface light emission and is applicable to equipment requiring a light distribution rule such as a vehicle lamp while reducing hot spot phenomenon caused by a light emitting element, Lt; / RTI > Particularly, a feature that can be efficiently applied to a portion requiring a limited curved arrangement where a daytime running lamp (DRL) or a position lamp is installed that satisfies the legal luminous intensity requirements is implemented.

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, ). In addition, it is very important in terms of enhancing the space utilization to implement the corresponding illumination package, because the overall structure of the housing is inclined and a curved shape is realized.

2, the illumination device according to the embodiment of the present invention includes a first module A accommodating the first light emitting device 110 in the first light guide part 120, And a second module B connected to one end of the first module A and having a second light emitting device 210 disposed on one side of the second light guiding unit 220. Particularly, in this case, the first module A and the second module B are arranged such that an extension line between the light exit surface X of the first light guide portion and the light exit surface Y of the second light guide portion is inclined at an angle? As shown in FIG.

The first module A and the second module B may be connected to each other at a predetermined angle as shown in FIG. In this case, the term 'connected' means that the first light guide unit 120 and the second light guide unit 220 are in contact with each other, or they are arranged in a structure in which they are spaced apart from each other by a predetermined connecting member or an outer frame .

The light emitting devices 110 and 210 included in the first module A and the second module B include an optical device for emitting light and include various light sources. For example, 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. In this case, the first light emitting device may be a top view type LED, and the second light emitting device may be a side view type LED. The light emitting device included in the first module (A) and the second module (B) may further include a printed circuit board on which the light emitting device is mounted. 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.

In addition, the optical guide layers of the first module A and the second module B may be formed of a silicone resin, but the present invention is not limited thereto. In addition, the optical guide layer may be made of polystyrene (PS), polymethylmethacrylate (PMMA) A high permeability plastic such as cyclic olefin copoly (COC), polyethylene terephthalate (PET), resin, and a zigzag hardening resin including an oligomer. More specifically, the resin layer may contain urethane acrylate oligomer as a main raw material As shown in Fig. For example, a resin obtained by mixing a synthetic oligomer, a urethane acrylate oligomer and a polyacrylic polymer type, may be used. Of course, it may further comprise a monomer mixed with a low-boiling-point diluent type reactive monomer such as isobornyl acrylate (IBOA), hydroxypropyl acrylate (HPA), or 2-hydroxyethyl acrylate (HPA). A photoinitiator -hydroxycyclohexyl phenyl-ketone) or an antioxidant.

In particular, in one embodiment of the present invention, the first light guide layer and the second light guide layer are formed by applying a silicone resin so as to have high heat resistance, can do.

The first module A and the second module B may be formed such that the extension line of the light exit surface X of the first light guide portion and the light exit surface Y of the second light guide portion form an inclination angle? 1, the inclination angle? 1 may be an obtuse angle or an acute angle.

FIG. 3 is a conceptual diagram illustrating the structure and operation of the first module A in FIG.

Referring to FIGS. 2 and 3, the first module A includes a first light emitting device 110, a second light emitting device 110, a second light emitting device 110, And may include a plurality of reflection patterns inside the light guide portion.

The first module A may include a first reflective pattern 130 disposed at an upper portion inside the first light guide portion 120 and disposed at a corresponding position on the first light emitting device 110, And a second reflection pattern 140 disposed under the first light guide part 120 and reflecting the light reflected by the first reflection pattern 130. [

The first reflection pattern 130 is positioned on the light emitting device 130 and reflects light emitted from the light emitting device 130 to be guided to the second reflection pattern 140. Of course, in this case, part of the light is directly emitted through the light exit surface X, and a part of the light a1 and a2 passes through the second reflection pattern.

The first reflection pattern 130 may include a synthetic resin dispersedly containing a white pigment in order to realize a property of promoting light reflection and light dispersion. Particularly, the first reflection pattern 130 is disposed in a vertical upper direction in which light emitted from the light emitting device 110 is most strongly transmitted, thereby preventing hot spots due to deterioration of the light guide member .

The first reflection pattern 130 may be formed in a conical shape so as to scatter and disperse light emitted through the direct-type light emitting device 110. That is, the first reflection pattern may be implemented as a conical structure arranged to be attached in the direction of the first light emitting device.

Fig. 4 is a conceptual diagram showing the structure of the second module B in Fig. 2. Fig.

2 and 4, the second module B according to the embodiment of the present invention is disposed below the second light guide part 220, and the light passing through the inside of the second light guide part And a diverging member 230 including an optical pattern 231 that diverges to the light exit surface. The second light emitting device 210 may be disposed on the outer side of the second light guide member 220. The second light emitting device 210 may be disposed on the outer side of the second light guide member 220, Or may be implemented by a structure that is inserted into the edge portion.

In this case, the second light guide part 220 may be made of the same material as the first light guide part, so that uniform light characteristics can be ensured due to light passing through the same medium . Therefore, in this embodiment, the second light guide portion can be formed of a silicone resin. Of course, various high heat-resistant resins that implement the first light guide portion described above can be applied as they are.

In the case of the second light emitting device 210 disposed on the outer side of the second module B, the side light emitting diode (LED) is mounted on the printed circuit board to emit light, So that they can emerge toward the side. In addition, the second module (B) may be used in the form of a light guide plate by applying silicone to uniformly disperse the light emitted from the light source.

The diverging member 230 may form a pattern on the upper surface or the lower surface of the medium through which the emitted light is guided, and the medium may be formed of silicon. The optical pattern 231 may have a mirror surface, a prism shape, a lenticular shape, a lens shape, or a combination thereof in order to increase the scattering effect of light emitted from the light emitting device, but is not limited thereto. In addition, the pattern may be formed by embossing or embossing, and the cross-sectional shape may be a structure having various shapes such as a triangle, a rectangle, a semicircle, and a sine wave. Further, a separate optical sheet 240 may be added to the upper surface of the second light guide portion to enhance light diffusion. The diverging member (230) of the lower portion of the second light guide member guides light in the form of a light guide plate, and the light guided is incident on the lower optical pattern or a pattern formed on the upper optical sheet, Use light to emit light to the front. That is, in the structure of FIG. 2, the front light intensity, which is the legal light distribution standard, is maintained by directing the light toward the front face with the structure of the first module (A) Can be controlled.

2 and 4, the light emitted from the light exit surface Y of the second module according to the embodiment of the present invention is reflected by the light exit surface of the second light guide portion in the light exit direction The extending line in the vertical direction can be formed to form an inclination angle? 2 of 25 to 30 degrees. In other words, as shown in FIG. 4, in the case where the outgoing light emitted from the upper surface of the second light guide portion is obliquely emitted so as to form the inclination angle? 2, The outgoing light of the first module and the outgoing light of the second module can be emitted in substantially the same upward direction.

5 is a front view schematically showing a diverging member included in a first module of a point light source vehicle lamp in which a hot spot is reduced according to an embodiment of the present invention.

In the case of the above-described first module, the direct-type LED is coated with silicon and used in the form of a light guide plate, and a conical reflection pattern structure is formed on the front surface of the LED to shield the hot spot, it is very important to reflect the light to the lower part of the silicon with a loss, and the reflected light fits the second reflection pattern 140 of the lower part of silicon and emits vertically. FIG. 5 shows the light distribution according to the arrangement structure of the second reflection pattern 140 formed in this case. It is only required to be configured in rotational symmetry to achieve optimum efficiency.

In addition, the illumination device according to the embodiment of the present invention may include a first module A including the direct-type light source and a second module B including the edge-type light source, The second module B may be connected to the first module A at a predetermined angle so as to maintain a curved shape, and the light emitted from the light source may be incident on the first module A at a position, , The size of the pattern, the depth, the shape, and the like, so that the peak value can be diverged at a constant angle.

When the illumination device according to the embodiment of the present invention is applied to a vehicle lamp, it is possible to provide a daytime running lamp (DRL) or a position lamp satisfying the legal luminous intensity regulation while reducing direct light or hotspot emitted from the LED By applying silicone to LED and using it as a light guide plate, it is possible to meet the heat resistance standard of the front lamp.

Furthermore, the lighting device according to the embodiment of the present invention is applicable to various lamp devices requiring control of hot spots and adjustment of a light distribution, such as a vehicle lamp, a domestic 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.

A: First module
B: Second module
110: first light emitting element
120: first light guide portion
130: first reflection pattern
140: second reflection pattern
210: a second light emitting element
220: second light guide portion
230: absence of divergence

Claims (10)

A first module for accommodating the first light emitting element in the first light guide portion; And
And a second module connected to one end of the first module and having a second light emitting element disposed outside the second light guiding part,
And an extension of the light exit surface of the first light guide portion and the light exit surface of the second light guide portion forms an inclination angle? 1.
The method according to claim 1,
And at least two of said first modules.
The method according to claim 1,
Wherein the inclination angle? 1 is an obtuse angle or an acute angle.
The method according to claim 1,
And an extension line in a direction perpendicular to the light exit direction of the second light guide portion forms an inclination angle? 2 of 25 to 30 degrees.
The method according to any one of claims 1 to 4,
The first module includes:
A first reflection pattern disposed at an inner upper portion of the first light guide portion and disposed at a corresponding position on an upper portion of the first light emitting device;
A second reflection pattern disposed inside the first light guide portion and retroreflecting light reflected from the first reflection pattern;
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The method of claim 5,
The first reflective pattern may be formed by patterning,
And the second light emitting element is arranged so as to be attached in the direction of the first light emitting element.
The method of claim 5,
Wherein the first light guide portion comprises:
Wherein the outer surface of the first light emitting device is a silicon resin.
The method of claim 5,
Wherein the second module comprises:
A second light guide member disposed below the second light guide member,
And a diverging member including an optical pattern for diverging light passing through the inside of the second light guide portion to a light exit surface
Further comprising:
The method of claim 8,
Wherein the second light guide portion is the same medium as the first light guide portion.
A lamp for a vehicle comprising the lighting device according to any one of claims 1 to 4.

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