KR20150089246A - Illuminating device and lamp for vehicle including the same - Google Patents

Abstract

The embodiment of the present invention relates to an illuminating device which can control the width of a light source and a backlight area. A light mixing space (region) is formed by using a light guide member of a structure which surrounds a light emitting module. A structure where the width of a light exiting part is narrower than that of a light entering part, is formed. Therefore, the illuminating device improves light efficiency by increasing the mixing rate of light.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an illumination device,

Embodiments of the present invention relate to an illumination device capable of adjusting the width of a light source and capable of adjusting a light distribution area.

A light emitting device (LED) is a semiconductor device that converts electric energy into light energy. The compound semiconductor can control the composition of the compound semiconductor to realize light of various wavelengths (colors) such as red, green, blue and ultraviolet rays. It is possible to realize white light with high efficiency.

The light emitting device has advantages such as low power consumption, semi-permanent lifetime, fast response speed, safety, and environmental friendliness compared to conventional light sources such as fluorescent lamps and incandescent lamps. Accordingly, a light emitting diode backlight replacing a cold cathode fluorescent lamp (CCFL) constituting a backlight of an LCD (Liquid Crystal Display) display device, a white light emitting diode lighting device capable of replacing a fluorescent lamp or an incandescent lamp, Applications range from traffic lights to widespread use.

According to the related art, a light emitting device chip is coupled to a predetermined package body, a resin including a phosphor is provided on the light emitting device chip, and a lens is formed on the resin to form a light emitting device package.

However, conventional lighting using LEDs requires a large number of LEDs to adjust the distribution of light distribution, or an assembling structure in which the width of a light source is difficult to control. Particularly, a package that forms a surface light source has a three- In the case of lighting, there is difficulty in realizing a planar light source due to limitations in work due to the size of the constant current device.

In order to solve the above-described problems, embodiments of the present invention provide a light-emitting device in which a light mixing space (region) is formed by using an optical waveguide member having a structure surrounding a light emitting module and a width of a light output portion is formed narrower than a width of a light incidence portion The light efficiency can be improved by increasing the mixing ratio of light, and it is also possible to provide a lighting device capable of adjusting the distribution of light distribution and the size of the entire device even with a small number of optical elements.

In order to solve the above-described problems, in an embodiment of the present invention, a light emitting module on a substrate; And a light oil member surrounding the periphery of the light emitting module on the substrate, wherein an extension line (X) of the inner surface of the light-emitting member and an extension line (Y) of the substrate surface are acute.

According to the embodiment of the present invention, by implementing a structure in which a light mixing space (region) is formed by using an optical waveguide member having a structure surrounding the light emitting module and a width of the light output portion is narrower than a width of the light incident portion, The mixing efficiency can be increased and the light efficiency can be improved.

In addition, when the lighting device is implemented, the width of the light can be adjusted and the height of the entire lighting device can be easily adjusted. Even if the height of the entire light mixing space is reduced, the light mixing ratio can be increased by using the lens module to reduce the number of LEDs In addition,

It is possible to increase the scattering effect by increasing the light mixing efficiency through the light mixing region of the inclined structure and to ensure the general versatility of allowing the diffusion member to be dedicated to the light source or the surface light source by controlling the width and height of the diffusion member.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a cross-sectional view showing a main portion of a lighting apparatus according to an embodiment of the present invention; 2 and 3 show a cross-sectional view of a main part of a lighting apparatus according to another embodiment of the present invention.
FIG. 4A is an exploded perspective view showing an actual implementation image of a lighting apparatus according to an embodiment of the present invention shown in FIG. 1, FIG. 4B is an assembled perspective view of FIG. 4, and FIG. 4C is a side plan view of FIG. 4A.

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.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. In the description of the embodiments, it is to be understood that each layer (film), region, pattern or structure is formed "on" or "under" a substrate, each layer The terms " on "and " under " encompass both being formed" directly "or" indirectly " The thickness and size of each layer in the drawings are exaggerated, omitted, or schematically shown for convenience and clarity of explanation. Also, the size of each component does not entirely reflect the actual size. Hereinafter, embodiments will be described with reference to the accompanying drawings.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a cross-sectional view showing a main portion of a lighting apparatus according to an embodiment of the present invention; 2 and 3 show a cross-sectional view of a main part of a lighting apparatus according to another embodiment of the present invention.

1, a lighting apparatus according to an embodiment of the present invention includes a light emitting module 120 on a substrate 110 and a light-emitting element 130 surrounding the periphery of the light emitting module on the substrate, So that the extension line X of the inner surface of the optical waveguide member and the extension line Y of the substrate surface can be formed to have an acute angle. That is, the optical waveguide member 130 has a structure in which a space is formed in the interior of the optical waveguide member 130, and the width of the internal space portion (hereinafter, referred to as a 'light mixing region M' To realize a light mixing region M of the light-emitting layer.

Through which light emitted from the lower portion is mixed with light reflected on the inner surface of the optical waveguide member 130 in the light mixing region M where the width becomes narrower toward the upper portion, The light mixing is maximized near the light output portion so that light can be condensed so that the light efficiency can be maximized. To this end, the optical waveguide member 130 is formed in such a manner that one end thereof is in close contact with the surface of the substrate 110 and the other end thereof is inclined toward a central portion of the base member to a certain degree.

The arrangement of the light-emitting member 130 having such a structure is preferably such that the light mixing region M is formed therein and the lower width T1 of the light mixing region is formed larger than the upper width T2 .

In order to maximize the mixing efficiency of light, a structure in which the lower width (T1) of the light mixing region is formed to be larger than the upper width (T2) The mixed region M may be formed so that the width gradually decreases from the lower surface to the upper surface. Alternatively, as shown in FIGS. 2 and 3, the light-emitting member 130 may be formed in a curved shape instead of a flat plate It is possible.

In any case, when the light emitted from the light source module 140 is mixed in the light mixing region and emitted through the opened light emitting portion on the upper side, the structure for maximizing the light mixing ratio in the condensed form is adopted, The width T1 is formed to be larger than the top width T2. This is because the extension line X of the inner surface of the optical oil guide member and the extension line Y of the substrate surface have an acute angle (?), Even when considering various shapes of the optical member (130) . The extension line X is defined as a virtual straight line connecting one end (a) to the other end (b) of the optical oil guide member.

The extension line (X) of the inner surface of the optical waveguide member and the extension line (Y) of the base surface form an acute angle (?), Which is reflected and re-reflected on the surface of the light- When the extension line X of the inner surface of the optical waveguide member and the extension line Y of the substrate surface are at right angles or obtuse angles, The efficiency of light collection is lowered and the mixing ratio of light is lowered. In particular, the acute angle? May be variously adjusted according to the necessity of the illumination device, but it is preferably formed at an angle of 30 to 80 degrees. At an angle of less than 30 degrees, the mixing ratio of light and the efficiency of light condensation are lowered, and when the angle is more than 80 degrees, there is no significant difference from the case where light is condensed or mixed at right angles.

The optical waveguide member 130 can be realized not only in the shape of a flat plate as in the structure of FIG. 1 but also in a bending structure of an inverted parabolic structure as shown in FIG. 2 or a bending structure of a parabolic structure as shown in FIG. In the case of having such a curvature, the structure of FIG. 2 is advantageous in terms of increasing the mixing ratio by increasing the volume of the light mixing region. In the structure of FIG. 3, there is an advantage in that the light condensing efficiency is increased.

Further, it is preferable that the light-reflecting member according to the embodiment of the present invention can increase the reflectance by using a resin material including a reflection member or a structure coated with a reflection material on the surface, For example, a resin material, a metal material, or a non-metal material.

In this case, the reflective member or the reflective member may be formed of at least one selected from the group consisting of Ag, Al, Pt, Cr, Ni, titanium oxide, silicon oxide, aluminum oxide, magnesium fluoride, tantalum oxide And a zinc oxide may be applied.

Further, in the embodiment of the present invention, the diffusion member 140 is disposed on the upper surface of the light mixing region, that is, the upper surface of the light-emitting member 130 that is opened, and the light is condensed and mixed, (140), so that a surface light source or a light source can be realized. That is, when it is necessary to reduce the width of the light (the light source or the surface light source) emitted according to the specification of the product, the width of the upper opening portion of the upper light guide member 130 is narrowed and the width of the diffusion member is narrowed, Can be done.

The diffusion member 140 may be formed in a generally flat plate shape. However, as shown, the diffusion member 140 may include a top diffusion surface 141 and a height adjustment diffusion surface 142 that is bent and extended from the top diffusion surface. Structure, so that a space inside the diffusion member can be formed as necessary to control the width and the amount of light. The diffusion member may be a thermosetting resin having transparency, for example, a silicone resin, an epoxy resin, or a polymer-based resin.

The diffusion member may further include a fluorescent material therein, or may include an additive or increase the viscosity of the resin material to improve homogeneity.

When the fluorescent material is contained in the diffusion member, the emitted light may be excited to realize a different color. For example, when the light emitting element 121 is a blue LED and the diffusion member 140 includes a yellow phosphor, the phosphor may be excited by blue light to emit white light. Also, when the light emitting element 120 is a UV LED and the phosphor plate 180 comprises blue, green, and red phosphors, the phosphors may emit white light.

1 to 3, the light emitting module 120 may further include a lens module 150 between the light-emitting module 130 and the light emitting module 120. In addition, The lens module 150 includes a convex lens part which is easy to diffuse and is attached to the surface of the base material 110 at a lower part thereof and accommodates both the light emitting device 121 and the printed circuit board 122 inside the lens module. A receiving space is formed. The lens module 140 increases the amount of internal reflection by efficiently diffusing light emitted into the optical mixing region, thereby reducing the number of light emitting devices and increasing the light distribution area even when the number of light emitting devices is reduced. The lens module 150 may be designed in consideration of variables such as a curvature, a thickness, and a distance to the LED chip so that light can be incident on the light mixing region M.

The light emitting device 121 may be implemented as a colored LED chip such as a red LED chip for generating red light, a blue LED chip for generating blue light, a green LED chip for generating green light, or a UV LED chip. At least one or more LED chips may be mounted on the base 110, and the type and number of LED chips are not limited. Further, a protection element (for example, a zener diode) for protecting the light emitting element 120 may be mounted. The printed circuit board may be a metal core PCB (Printed Circuit Board), an FR-4 PCB, or a general PCB, but is not limited thereto.

In addition, the light-emitting element 130 according to the embodiment of the present invention may be realized as an integral structure with the substrate, but may be formed as a separate structure to improve the processability of the injection molding and assembly process.

FIG. 4A is an exploded perspective view showing an actual implementation image of the lighting apparatus according to the embodiment of the present invention shown in FIG. 1, FIG. 4B is an assembled perspective view of FIG. 4, and FIG. 4C is a side plan view of FIG. 4A.

The illustrated structure is a structure in which one light emitting module 120 is applied and the lens module 150 and the light guide member 130 and the diffusion member 140 are assembled. (Illuminating lamps, rear lights, interior lamps, etc.), which are required to satisfy a certain light distribution distribution, as well as various indoor lights and exterior design lights, As shown in FIG.

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: Light emitting module
121: Light emitting element
122: printed circuit board
130:
140: diffusion member
150: Lens module
M: light mixing area

Claims (10)

A light emitting module on a substrate;
And a light-emitting element surrounding the periphery of the light-emitting module on the substrate,
Wherein an extension line (X) of the inner surface of the light-guiding member and an extension line (Y) of the substrate surface are acute angles.
(Where X is a virtual straight line connecting one end and the other end of the light-distribution member)
The method according to claim 1,
The light-
And a bottom width of the light mixing region is larger than a top width.
The method of claim 2,
The light-
Wherein a width of the light mixing region is sequentially decreased from a lower surface to an upper surface of the light mixing region.
The method of claim 3,
Wherein the light-emitting element is in the form of a flat plate.
5. The method according to any one of claims 1 to 4,
And a diffusion member on the light-oiling member.
The method of claim 5,
Wherein the diffusion member
Thereby sealing the upper portion of the light-oiling member.
The method of claim 6,
Wherein the diffusion member
An upper diffusion surface and a height-adjustable diffusion surface extending bendingly from the upper diffusion surface.
The method of claim 5,
The light-
A lighting device comprising a resin material including a reflecting member or a surface thereof coated with a reflecting material.
The method of claim 5,
And a lens module between the light-emitting element and the light emitting module.
A lamp for a vehicle comprising the illumination device of claim 5.

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