KR101933571B1 - A Reflection Type Surface Emitting Lighting - Google Patents

Abstract

The present invention relates to surface light emitting illumination, and more particularly, to illumination, which allows an LED (light emitting diode) with point-illumination to be surface-illuminated in a large area. A lighting device of the present invention of the present invention comprises: a reflective member (10) arranged at a predetermined angle (a) of 0 degree or more with respect to a light emitting surface (20) which is surface-illuminated; and a light source (30) for irradiating light toward the reflective member (10) between the light emitting surface and a reflective profile surface (13) of the reflective member (10). The reflective member (10) includes: a film member (11) having a first surface having the reflective profile surface (13) and a second surface facing the first surface; and first and second reflective surfaces (14, 15) alternately provided on a surface of the reflective profile surface (13) in a longitudinal direction of the film member. An incident light (61) emitted from the light source (30) is incident on the first reflective surface (14). A first reflected light (62) in which the incident light (61) is reflected by the first reflective surface (14), is adjacent to the first reflective surface (14), and is incident on the second reflective surface (15) disposed to be closer to the light source (30) than the first reflective surface (14). Also, a second reflected light (63) in which the first reflected light (62) is reflected by the second reflective surface (14) is emitted toward the light emitting surface (20) while intersecting the incident light (61).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a surface emitting illumination, and more particularly, to a light emitting surface emitting a wide area LED (light emitting diode).

Light emitting diodes are used in various fields because they have an advantage of being very excellent in luminous efficiency as compared with general light bulbs. Light-emitting diodes (LEDs) are widely used in industrial applications such as semiconductor exposure equipment as well as lighting that illuminates areas where people live.

However, LEDs are close to intensive point lighting. Such point lighting is very inadequate to use as direct illumination because of its high brightness, and it may cause damage to the visual nerve when viewed directly by a person. Accordingly, an illumination structure for indirectly illuminating a light emitting diode that emits a point light is widely used.

Most of these kinds of surface emitting luminaires use a light guide plate and a prism sheet to widen the light emitting area and to forward the light emitting direction to increase the luminance.

Further, in order to realize surface emission, a method of evenly distributing light emitting diodes in an area corresponding to a light emitting surface and mounting them is also used.

However, since optical members such as a light guide plate and a prism sheet have high cost, there is a problem that the unit price of illumination increases as a whole, and arranging light emitting diodes corresponding to the light emitting area requires more light emitting diodes there is a problem.

Due to such a problem, a structure in which a light emitting diode is installed at an edge and light is irradiated to a side surface and then light is emitted has been used. However, since the use of a light guide plate and a prism sheet is inevitable, .

Patent Registration No. 1829098 Patent Registration No. 1193503 Registration Utility Model No. 483741

It is an object of the present invention to provide a lighting apparatus capable of minimizing the number of light emitting diodes and sufficiently emitting light even when the light guide plate and the prism sheet are omitted.

Another object of the present invention is to provide a lighting device which is simple and compact to manufacture, and which can greatly reduce the cost.

It is another object of the present invention to provide a lighting device that flexibly deforms a light-emitting surface that emits light and can use the light in an optimal lighting state.

Another object of the present invention is to provide a surface-emitting illumination device capable of greatly increasing the brightness without using a prism sheet.

In order to solve the above-described problems, the present invention provides a reflective member (10) having a light source (30) arranged on a side surface and being inclined by a slight angle (a) substantially parallel to the incident direction of the light source (30) Is provided on the side of the light source (30), and a light emitting surface (20) which is provided on the front surface of the reflecting member (10) In addition, the light source 30 is disposed on the side surface, and the light emitting surface 20 and the reflecting member 10 are parallel to each other in the incident direction of the light source 30, So as to provide a possible illumination device.

The light emitting surface 20 may be disposed parallel to a typical light emitting direction of the light source 30. And the light emitting surface 20 is disposed in parallel with the reflective member 10 or side by side with the reflective member 10 while being inclined at a slight angle a. Then, the illumination device has a light emitting surface having a large area L corresponding to the light emitting surface 20, and the overall thickness is thinner than the thickness w of the light source 20, thereby making it possible to manufacture light.

The reflection member 10 is formed by forming a reflection profile surface 13 in which a first reflection surface 14 and a second reflection surface 15 are alternately arranged on a first surface of a UV cured synthetic resin film, It is possible to deposit a metal such as aluminum with a thickness of about 0.05 mm to 2.5 mm. And more preferably 0.25 mm to 1 mm. In this case, it is possible to implement the surface emitting illumination simply by attaching the film to the side surface of the light source diagonally or attaching the light source to the side surface of the film.

Wherein the first reflective surface (14) reflects light incident from a light source onto the second reflective surface (15), and the second reflective surface (15) reflects light reflected from the first reflective surface 20).

The first reflective surface 14 is a profile that allows light incident on the first reflective surface to be uniformly reflected to the second reflective surface, and may include convex curved surfaces, concave curved surfaces, or planes.

The second reflective surface 15 may have a concave curved profile that can reflect the light reflected from the first reflective surface to be substantially perpendicular to the light emitting surface 20.

And also between the first reflective surface 14 and the second reflective surface 15 and / or between the second reflective surface 15 and the first reflective surface 14, regardless of the reflection of light, And a connecting surface (16) for allowing a separation distance between the second reflective surfaces. Particularly, such a connecting surface 16 makes it possible to set the angle a to be smaller or make the luminance closer to the light source and farther to be uniform.

In applying a film-shaped reflecting member, the first surface of the reflecting member, that is, the surface of the reflecting profile surface 13 may be used as a reflecting surface, or the back surface may be used as a reflecting surface. For example, if the reflection profile surface 13 is provided so as to face the light source, its surface can be used as a reflecting surface. On the contrary, if the second surface which is the opposite surface of the first surface is provided so as to face the light source and the film member 11 is made of a light transmitting material, the back surface of the reflection profile surface 13 can be used as the reflecting surface .

Of course, the present invention does not exclude the use of an optical member such as a light guide plate, a diffusion plate, and the like. The present invention can realize a surface light emission of high brightness without using a light guide plate and a diffusion plate, and if a light guide plate and a diffusion plate are used in addition to this, naturally higher quality surface light emission can be realized. This is clearly distinguished from the conventional case in which the illuminating device uses the light guide plate and the diffusion plate to realize the light emission.

As the light source 30, an LED may be used.

More specifically, the present invention relates to a surface-emitting illumination device comprising: a reflection member (10) arranged at a predetermined angle (a) of 0 to 45 degrees with respect to the light emitting surface (20) And a light source (30) for irradiating light toward the reflection member (10) between the light emitting surface and the reflection profile surface (13) of the reflection member (10).

The reflective member (10) comprises: a film member (11) having a first surface having the reflective profile surface (13) and a second surface facing the first surface; And a first reflective surface (14) and a second reflective surface (15) alternately provided on the surface of the reflective profile surface (13) along the longitudinal direction of the film member.

The incident light 61 emitted from the light source 30 is incident on the first reflective surface 14 and the primary reflected light 62 reflected from the first reflective surface 14 by the incident light 61 is reflected by the first reflective surface 14, Is incident on a second reflective surface (15) adjacent the first reflective surface (14) and located closer to the light source (30) than the first reflective surface (14) The secondary reflected light 63 reflected by the primary reflected light 62 intersects with the incident light 61 and is emitted toward the light emitting surface 20.

The film member 11 may be made of a flexible light-transmissive material.

The film member 11 includes a base film layer 17 having a predetermined thickness and a reflective pattern layer 18 laminated on the surface of the base film 17 to form the reflective profile surface 13 .

Metal or reflective ink may be applied to the reflective profile surface 13 to form a first reflective surface 14 and a second reflective surface 15.

A connecting surface 16 may be further provided between the first reflective surface 14 and the second reflective surface 15 arranged alternately.

The first reflective surface 14 includes a convex, flat or concave surface profile as viewed from the direction in which the light is irradiated, and the second reflective surface 15 has a concave curved surface Profile. ≪ / RTI >

The incident light 61 is incident on the first reflective surface 14 through the medium toward the surface of the reflective profile surface 13 and the primary reflected light 62 passes through the medium to the reflective profile 13, Is incident on the second reflective surface 15 toward the surface of the surface 13 and the secondary reflected light 63 can be emitted to the light emitting surface 20 through the medium.

Wherein the medium may be air or a fluid medium 70.

To this end, the illumination device is arranged such that the exit surface (36) of the light source (30) is arranged between a first end located close to the light emitting surface (20) and a second end distant from the light emitting surface A light source mounting portion 81 to which the light source mounting portion 81 is fixed and a light source mounting portion 81 to which the light source mounting portion 81 is fixed, And a housing 80 having a reflective member mounting surface 82 for fixing the light source.

The housing 80 may further include a cover 85 that separates the medium from the external space of the illumination device and includes a transparent material or a diffusion plate.

And the cover 85 may form the light emitting surface 20. [

The incident light 61 is incident on the first reflective surface 14 toward the rear surface of the reflective profile surface 13 via the second surface of the film member 11 and the film member 11, And the primary reflected light 62 is incident on the second reflective surface 15 toward the back of the reflective profile surface 13 via the film member 11 and the secondary reflected light 63 is incident on the second reflective surface 15, And can be emitted to the light emitting surface 20 through the film member 11 and the second surface.

The surface-emitting illumination device may further include an optical member (50).

The optical member (50) includes: a light source mounting portion (81) facing the light emitting surface (36) of the light source (30) A reflective member mounting surface (82) facing the second surface of the film member (11); And the light emitting surface 20 on which the light reflected by the reflecting member 10 emits.

The light source mounting portion 81 and the reflecting member mounting surface 82 may be adjacent to each other and the light source mounting portion 81 and the light emitting surface 20 may be adjacent to each other.

The incident light 61 is incident on the film member 11 through the side surface of the film member 11 and is directed toward the back surface of the reflection profile surface 13 via the film member 10, 1 reflection surface 14 and the primary reflected light 62 is incident on the second reflective surface 15 toward the back surface of the reflective profile surface 13 via the film member 11, The reflected light 63 may be emitted to the light emitting surface 20 through the second surface of the film member 11.

As another example, the incident light 61 is incident on the base film layer 17 through the side surface of the base film layer 17, and the base film layer 17 Is reflected on the reflective pattern layer (18) through the interface between the reflective pattern layer (18) and the reflective pattern layer (18) Is incident on the second reflective surface (14), the primary reflected light (62) is incident on the second reflective surface (15) toward the back of the reflective profile surface (13) via the reflective pattern layer (18) The reflected light 63 may be emitted to the light emitting surface 20 through the second surface of the film member 11.

In the above examples, the predetermined angle a may be 0 degrees.

In the above examples, the second surface may be the light emitting surface 20.

The light emitting surface 20 may include a diffusion plate.

The refractive index N1 of the base film layer 17 and the refractive index N2 of the reflective pattern layer 18 may satisfy the following equation: N1 = N2.

In addition, it is more preferable to satisfy the following equation: 0.05 = N2 - N1 = 0.69.

According to the surface-emitting illumination device of the present invention, even if an expensive member such as an optical member such as a light guide plate or a prism sheet is not used and a high-precision reflection surface is not provided, Can be implemented.

Accordingly, the present invention can greatly simplify the structure of the surface-emitting illumination device, can be manufactured at low cost, and can be manufactured in a very light weight.

In addition, by allowing the film layer of the film-shaped reflection member to have the function of the light guide plate, it is possible to flexibly deform and use the light-emitting surface.

The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a cross-sectional view of a first embodiment and a second embodiment of a film-type reflection member used in a lighting apparatus according to the present invention.
FIG. 2 is a view showing a principle of converting a point light source into a surface light source through a reflection profile surface of the reflection member of FIG. 1. FIG.
3 is a cross-sectional view of a third embodiment and a fourth embodiment of the film-type reflection member used in the illumination device according to the present invention.
FIG. 4 is a view showing a principle of converting a point light source into a surface light source through a reflection profile surface of the reflection member of FIG. 3. FIG.
5 is a view showing various structures that can be used as a light source of the illumination device of the present invention.
6 is an exploded sectional view conceptually showing a first embodiment of the lighting apparatus of the present invention.
7 is a sectional view of the assembled state of the illumination device shown in Fig.
8 is an exploded sectional view conceptually showing a second embodiment of the lighting apparatus of the present invention.
9 is a sectional view of the assembled state of the illumination device shown in Fig.
10 is an exploded sectional view conceptually showing a third embodiment of the lighting apparatus of the present invention.
11 is a sectional view of the assembled state of the lighting apparatus shown in Fig.
12 is a partially enlarged schematic view of the third embodiment of Fig.
14 is a view showing a manufacturing process of a reflective member used in a fourth embodiment according to the present invention.
FIG. 15 is a diagram schematically showing a structure in which a surface-emitting illumination device is implemented using the reflection member shown in FIG.
15 is a view showing a modification of Fig.
Figs. 16 and 17 are views showing a modification of the reflection member of Fig. 14. Fig.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

It is to be understood that the present invention is not limited to the disclosed embodiments, but may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to inform.

[Principle of surface emission realization]

Hereinafter, the principle of surface emitting light emission of the illumination device according to the present invention will be described with reference to FIGS. 1 to 5. FIG.

The illumination apparatus of the present invention includes a reflection member (10) that diffuses and reflects light incident at a narrow width at an oblique angle. The reflective member 10 may be formed in a film form.

1 is a partially enlarged view of the reflective member 10 in the form of a film. The film-shaped reflecting members 101 and 102 shown in FIGS. 1A and 1B respectively have a first surface formed with the reflection profile surface 13 and a second surface used as the mounting surface 12 And a film member 11 provided thereon.

The film member 11 can be made of a synthetic resin material which is flexible and highly light transmissive. It may be a UV curable resin of PE material. The reflection profile surface 13 provided on the upper surface (first surface) of the film member 11 can be manufactured or formed through surface processing in the step of manufacturing the film with a synthetic resin. The lower surface (second surface) of the film member 11 can be made as a flat surface to prevent scattering and reflection of light which is easy to adhere and can possibly be incident on the film member 11 through the lower surface .

A metal having a very high reflectance such as silver or aluminum may be coated on the reflection profile surface 13 by a method such as vapor deposition through CVD or sputtering. In addition, a reflection ink of white color may be applied to the reflection profile surface 13 by a dipping method or the like.

The metal reflection layer coated on the reflection profile surface can reflect light irradiated from the top of the film on the surface of the first surface as well as light reflected from the bottom surface of the first surface (Back surface). The film shown in Fig. 1 (a) is a structure intended to reflect light at the surface of the first surface, and the film shown in (b) is a structure intended to reflect light at the back surface of the first surface . All of these reflection profile surfaces are easy to manufacture.

Fig. 2 shows the principle that the light of a narrow area is broadly surface-illuminated by the reflection profile surface 13 of the film shown in Fig.

The reflective profile surface 13 may be further provided with a connecting surface 16 for alternately arranging the first reflective surface 14 and the second reflective surface 15 and adjusting the distance or position between these reflective surfaces have.

The light source 30 may irradiate the light from the side surface of the reflecting member 10 toward the reflecting member 10 at an angle. The reflective member 10 may be disposed at a slight angle (a) with respect to the light source. 2, the light source 30 irradiates light in a horizontal direction as shown in the figure, and the reflective member 10 reflects the light to vertically upwardly reflect the light radiated in a narrow area. In theory, the light emitting area of the reflective member 10 may be increased by cot a times the light emitting area of the light source 30.

The reflection surface of the reflection member 10 is provided so as to face the emission surface 36 of the light source 30 and also to face the emission surface 20. [ The reflecting surface of the reflecting member 10 is arranged at an angle with respect to the incidence direction of the light source 30 and in the form of an inclined surface arranged obliquely with respect to the light emitting surface 20. [

When the reflecting member 10 is inclined at an angle of a and installed obliquely to the side of the light source 30, when the reflecting member 10 is viewed from the light source 30 in the horizontal direction, 14) are exposed. When the reflective member 10 is viewed downward in the vertical direction in the drawing, only a plurality of second reflective surfaces 15 are exposed.

FIG. 2 shows a configuration in which the light source 30 horizontally irradiates light and the reflecting member 10 is provided in a shape inclined at a predetermined angle (a), but this is a relative concept. That is, the light source 30 may be installed at a predetermined angle (a) downward from the horizontal, and the reflecting member 10 may be horizontal. And thus the pattern of the reflective surface of Figure 2 may also be slightly inclined (see Figure 17).

The convex curved surface of the first reflective surface 14 is formed by projecting incident light 61 (611, 612, 613) parallel to the horizontal direction parallel to the first reflective surface 14 from the light source 30, 2 reflective surface 15 and reflects. And the primary reflected light 62 reflected from the first reflective surface is all reflected vertically upward in the figure substantially at the second reflective surface 15 of the concave curved surface. That is, the secondary reflected light 63 (631, 632, 633) reflected by the second reflective surface 15 becomes more widely distributed parallel light.

As the mounting angle (a) of the reflective member 10 is smaller, the surface emission enlargement area becomes larger. The connecting surface 16 can set the distance between the first reflecting surface 14 and the second reflecting surface 15 of the reflecting member 10 to be wider and the two reflecting surfaces 15, (14, 15) can be set. Such a connection surface 16 makes it easier to make the installation angle a of the reflecting member 10 smaller, without involving or participating in reflection. In Figure 2, the connecting surface 16 is shown as not functioning as an intended reflecting surface. However, since the light irradiated from the light source is not a perfectly parallel light, the surface of the connecting surface 16 may also be involved in reflection.

2 shows a structure in which a connection surface 16 is disposed between a first reflection surface 14 and a second reflection surface 15 that receive and transmit reflection light from and to each other, But may be located between the neighboring second reflective surface 15 and the first reflective surface 14, or both.

Fig. 3 is a partially enlarged view of another embodiment of the reflective member 10 in the form of a film. The film-shaped reflecting members 103 and 104 shown in Figs. 3A and 3B also have a first surface on which the reflection profile surface 13 is formed and a second surface on which the mounting surface 12 is used, And a film member (11) provided with the film member (11).

The reflective layer coated on the reflective profile surface 13 can also reflect light emitted from the top of the film on the surface of the first surface as well as light reflected from the first surface It is also possible to reflect the light from the back surface of the light guide plate. The film shown in Fig. 3 (a) is a structure intended to reflect light at the surface of the first surface, and the film shown in (b) is a structure intended to reflect light at the back surface of the first surface . All of these reflection profile surfaces are easy to manufacture.

The reflective profile surface (13) is arranged such that the first reflective surface (14) and the second reflective surface (15) alternate. In the embodiment shown in FIG. 3, an example is shown in which the connecting surface 16 for adjusting the distance or position between these reflecting surfaces is not provided, but it is needless to say that the connecting surface 16 can be added (see FIG. 15 ).

4, the light source 30 irradiates light in a horizontal direction from the side of the reflective member 10, and the reflective member 10 installed at an angle to the side of the light source 30 reflects the light to vertically upward So that the light irradiated with a narrow area is broadly illuminated.

When the reflecting member 10 is inclined at an angle of a and installed obliquely to the side of the light source 30, when the reflecting member 10 is viewed from the light source 30 in the horizontal direction, 14) are exposed. When the reflective member 10 is viewed downward in the vertical direction in the drawing, only a plurality of second reflective surfaces 15 are exposed.

4 shows a form in which the light source 30 irradiates light horizontally and the reflecting member 10 is arranged at a predetermined angle (a), but this is a relative concept. That is, the light source 30 may be installed at a predetermined angle (a) downward from the horizontal, and the reflecting member 10 may be horizontal. And thus the pattern of the reflective surface of Figure 4 may also be slightly tilted (see Figure 16). In addition, when the reflecting member itself performs the light guiding function, the light source may be horizontally arranged and the reflecting member may be arranged horizontally.

The concave curved surface of the first reflective surface 14 is formed by projecting incident light 61 (611, 612, 613) parallel to the horizontal direction from the light source 30 toward the first reflective surface 14, 2 reflective surface 15 and reflects. And the primary reflected light 62 reflected from the first reflective surface is all reflected vertically upward in the figure substantially at the second reflective surface 15 of the concave curved surface. That is, the secondary reflected light 63 (633, 632, 631) reflected by the second reflecting surface 15 becomes more widely distributed parallel light.

The two reflective surfaces 14 and 15, which are adjacent to each other and receive reflected light, are repeatedly installed as a unit, and a connection surface is disposed between the units, a connection surface is disposed inside the unit, It is noted that the connecting surfaces can be disposed in the unit.

As shown in FIGS. 1 and 2, when the first reflective surface is a convex curved surface and the second reflective surface is a concave curved surface, and both the first reflective surface and the second reflective surface are both Irrespective of the concave curved surface, the angle r1 at which the incident light 61 irradiated from the light source is reflected by the first reflecting surface 14 and the angle r1 at which the reflected primary light 62 reflected by the first reflecting surface 14, The sum of the angles r2 reflected by the second reflective surface 15 is set to approach 90 to 90 degrees. If the reflection angle r1 of the primary reflected light 62 is 89 degrees (see 613 in Fig. 2 and 611 in Fig. 4), the reflection angle r2 of the secondary reflected light corresponding thereto is 1 degree 631 and 631 in FIG. 4). When the reflection angle r1 of the first reflected light is 45 degrees (see 612 in FIG. 2 and 612 in FIG. 4), the reflection angle r2 of the second reflected light corresponding thereto is 45 degrees (See 632 in Fig. 2 and 632 in Fig. 4). When the reflection angle r1 of the first reflected light is 1 degree (see 611 in Fig. 2 and 613 in Fig. 4) ) Is 89 degrees (see 631 in Fig. 2 and 633 in Fig. 4).

4, the inclination of the first point b11 of the first reflective surface area B1 on which the incident light 61 is incident is 90 degrees, and the inclination of the second point b12 It is preferred that the profile has a slope of -45 degrees so that the first reflective surface has a concave profile in order to make the angle of a very small.

The profile has a profile such that the inclination of the first point b21 of the second reflective surface area B2 on which the primary reflected light 62 is incident is -45 degrees and the inclination of the second point b22 is zero degrees , it is preferable that the second reflecting surface has a concave profile in order to make the angle of a very small.

The profile of such a reflective surface may be set on the same principle in the case of FIG. As a result of research conducted by the inventors, when the first reflective surface is convexly formed as shown in FIGS. 1 and 2 as compared with the concave first reflective surface as shown in FIGS. 3 and 4, the first reflective surface is made more compact . In addition, when the first reflective surface has a convex profile, the light reflected from the second reflective surface is more uniformly spread even though the degree of parallelism of the incident light of the light source 30 is somewhat smaller than that of the concave profile. It is confirmed that it can be easier.

On the other hand, even if the first reflecting surface 14 forms a flat plane without being convex or concave, it is possible to realize plane light emission as intended in the present invention. Since the surface light emission of the illumination is not always realized by irradiating light perpendicular to the light emitting surface 20, the first reflection surface 14 constitutes the reflection profile surface 13 for realizing surface light emission There is no problem with it.

By setting the profile of the first reflective surface and the second reflective surface so as to have such a reflection angle as described above, it is possible to provide a reflective light source in the form of a planar light source without any optical member such as a light guide plate or a diffusion plate, It is possible to make a surface light source. If the inclination angle a of the reflective member 10 is set to be small and the condition is satisfied, the illumination device can be made slim and the light emitting area can be enlarged at the ratio of cot a, Do.

In the lighting apparatus, the light source 30 and the reflective member 10 may be mounted on a housing 80 to be described later, fixed relative to each other, or assembled to the optical member 50, and their relative positions may be fixed. In addition, the light source 30 may be directly fixed to the reflecting member 10.

The light source 30 may be configured such that the light emitted from the LED that is the light emitting unit 31 mounted on the substrate 32 is directly incident on the reflector 34 or the lens 35 to form a parallel light to some extent and to be incident on the reflecting member 10. [ At this time, the direction of the light emitting portion 31 may be arranged to face the reflecting member 10 as shown in (b) or (c), or may be arranged to face the surface emitting surface as shown in (a) , And the reflective member 10 may be arranged back-to-back. The reflector 34 may be provided on one side as shown in Fig. 5 (a) or may be provided on both sides as shown in Fig. 5 (b), and the lens 35 may be integrally packaged on the substrate .

The light that has been condensed and becomes somewhat parallel is emitted through the exit surface 36 of the light source and incident on the reflecting member 10.

[First Embodiment]

Hereinafter, a first embodiment of a lighting apparatus to which the principle of surface emitting light emission of the present invention is applied will be described with reference to FIG. In the first embodiment, the illuminating device applying the structure in which the reflection occurs on the surface of the reflecting member 101, 103, that is, the reflecting profile surface 13 as shown in FIG. 1A or FIG. 3A .

The light source 30 and the reflective member 10 are installed in the housing 80 and their positions can be mutually fixed.

The housing 80 includes a light source mounting portion 81 on which the light source 30 is mounted and a reflecting member mounting surface 82 on which the reflecting member 10 is mounted. The space having a substantially right triangular-shaped cross section provided on the rear surface of the reflecting member mounting surface 82 may be a receiving portion 84 in which a control unit 40 for controlling the light source 30 is installed.

The housing 80 may define a rectangular parallelepiped space having a width of approximately L and a depth of w.

A single flat reflective surface changes the angle of incidence of light with respect to the incident light by a reflection angle, and does not have a condensing effect. Reflective surfaces such as convex mirrors disperse incident light but are not suitable for surface emission because they are not parallel light types. In the surface emission type using an optical member such as a light guide plate, a large amount of light may be reflected or lost while light is transmitted between the dense medium and the light medium, and the manufacturing cost and the weight of the light are increased.

However, in the lighting apparatus of the present invention, the structure in which the light emitting area of the light source is enlarged by cot a = L / w is formed by attaching a film-shaped reflecting member 10 at a side of the light source 10, It is completed by installation.

In addition, since the space corresponding to the right triangular portion can be used as the receiving portion 84 of the housing 80, and various electric parts such as the control unit 40 can be installed at this portion, a compact and slim side- Device design is possible.

In addition, a cover 85 for covering the light source and the reflection member is further provided at a position corresponding to the light emitting surface 20 of the illumination device, thereby preventing foreign matter from entering the surface of the reflection member.

The cover 85 may be made of a transparent material, a light dispersing material such as a glass plate, or a diffusion plate material. The cover 85 having the same structure as the diffusion plate can further improve the quality of surface emission. Of course, since the surface is already illuminated by the reflecting member, the cover 85 can be omitted.

[Second Embodiment]

Hereinafter, a first embodiment of a lighting apparatus to which the principle of surface emitting light emission of the present invention is applied will be described with reference to FIGS. 8 and 9. FIG. In the following description of the second embodiment, the description of the elements overlapping with those of the first embodiment will be omitted.

In the second embodiment, in addition to the first embodiment, an optical structure is implemented by filling a fluid medium 70 such as a liquid between the front surface of the reflective member 10 and the cover 85. [

According to the second embodiment, after the reflection member 10 is installed in the housing 80, the fluid space 70 is filled in the front space of the reflection member 10, and the fluid medium 70 is prevented from leaking The cover 85 is sealed. The fluid medium 36 then penetrates into and fills the space between the first reflective surface 14 and the second reflective surface 15.

The light source 30 may be interchangeably installed regardless of the space filled with the fluid medium 70.

According to the second embodiment, the light of the light source 30 passes through the fluid medium 70 and reaches the surface of the first reflective surface 14 of the reflective member 10.

Incident light reaching the surface of the first reflective surface 14 is reflected and is incident on the second reflective surface 15 adjacent to the first reflective surface 14 through the fluid medium 70. The secondary reflected light reflected by the second reflective surface 15 is reflected by the substantially parallel light, passes through the fluid medium 70, and is emitted as illumination light through the light emitting surface 20.

According to such a structure, it is possible to prevent the surface of the reflection member 10 from being contaminated. The incident light irradiated with a slight error in the light source 30 is also totally reflected by the light emitting surface 20 of the fluid medium 70 or the cover 85 and is incident on the reflecting member 10 Reference). Above all, such a structure is more preferable in that it can have an effect similar to that of the light guide plate without expensive optical members such as a light guide plate.

In order to minimize the occurrence of reflections and refractions at the boundary between the cover 85 and the fluid medium 70, it is preferable that the density of the cover and the fluid medium are set to be similar to each other. That is, the material of each medium can be adopted so as to have similar densities.

[Third Embodiment]

10 to 12, a third embodiment of a lighting apparatus to which the principle of plane emission of the present invention is applied will be described. In the third embodiment, the illuminating device 102 or 104 as shown in FIG. 1 (b) or FIG. 3 (b), that is, the illuminating device applying the structure in which the reflection occurs on the back surface of the reflecting profile surface 13 .

An optical member 50 is provided in a space in which the reflecting member 10 and the light source 30 face each other and the light source mounting portion 81 and the reflecting member mounting surface 82 are provided on the optical member, The light source 30 and the reflecting member 10 are provided in the housing 80 in that the light emitting surface 20 and the light emitting surface 20 are both provided. The optical member 50 may be made of a material having good light transmittance such as acrylic. And the emitting surface 36 of the light source 30 and the emitting surface 20 of the illuminating device are perpendicular to each other so as to have a structure having a vertically long triangular cross section as a whole.

The junction between the optical member 50 and the reflective member 10 can be bonded via an optical adhesive (OCR / OCA) 90 having a similar density to that of the optical member and having good permeability.

In the third embodiment, there is a difference in that the reflecting surface of the reflecting member 10 is formed not on the surface of the reflecting member 10 but on the back surface of the reflecting member 10. In other words, in the film constituting the reflecting member 10 of the third embodiment, the reflecting surface is the back surface of the first surface, that is, the reflecting profile surface 13. The light emitted from the light source 30 passes through the optical member 50, the optical adhesive 90 and the film member 11 and reaches the first reflective surface 14 of the back surface of the reflective profile surface 13.

Since aluminum is deposited on the surface of the synthetic resin film having the reflective surface profile formed on the surface thereof, when the light is irradiated directly to the reflection surface profile from the outside of the film, the light passes through the synthetic resin portion of the film, Reflection may occur even if light is irradiated on the back surface of the profile.

The incident light reaching the back surface of the first reflective surface 14 is reflected and is incident on the back surface of the second reflective surface 15 through the synthetic resin portion of the film member 11. The secondary reflected light reflected by the back surface of the second reflective surface 15 is reflected by the substantially parallel light and passes through the synthetic resin portion of the film member, the optical adhesive 90 and the optical member 50, (20). ≪ / RTI >

It is preferable that the densities of the film member, the optical adhesive and the optical member are set to be close to each other in order to minimize reflection and refraction between the boundary between the film member and the optical adhesive and between the optical adhesive and the optical member. That is, the material of each medium can be adopted so as to have similar densities.

According to the third embodiment, since the light source 30 and the reflecting member 10 can be fixed by the optical member 50, the configuration of the housing 80, which is the structure exemplified in the first embodiment, It is possible to omit it or to produce it in a different form.

When the optical member 50 is further provided as in the third embodiment, it is possible to prevent the back surface of the reflection profile surface 13, which is the reflection surface of the reflection member 10, from being contaminated. 12, the incident light irradiated with a slight error in the light source 30 is totally reflected by the light emitting surface 20 of the optical member 50 or the cover 85 and is incident on the reflecting member 10 .

In the illustrated third embodiment, the predetermined angle a is a small acute angle, but the predetermined angle may be 0 degree. That is, even if the reflecting member 10 and the light emitting surface 20 are parallel to each other, the light emitted from the light source 30 is not entirely parallel light like solar light but diffused, All of which can be reflected through the reflecting member 10 and used as illuminating light through the light emitting surface 20. [

That is, in the present invention, when the light source 30 emits parallel light, it means parallel light such as direct sunlight, rather than light that reaches the light emitting surface 20 directly from the light source 30, Is reflected back to the reflecting member 10, that is, the light spreads at an angle equal to or larger than the total reflection critical angle.

Unlike the conventional light guide plate, the optical member of the third embodiment does not undergo panel processing by printing or laser patterning under the light guide plate. Therefore, the material itself may be similar to the conventional light guide plate, but it should be noted that it is not necessary to perform the panel processing which causes the price increase at all.

[Fourth Embodiment]

13 to 17, a fourth embodiment of a lighting apparatus to which the principle of plane emission of the present invention is applied will be described below. In the fourth embodiment, a structure in which reflection occurs at the back surface of the reflection members 102 and 104, that is, the reflection profile surface 13 as shown in FIG. 1 (b) or FIG. 3 There is exemplified a lighting apparatus in which light is incident on a side surface of a member and the film member itself constituting the reflecting member performs a light guiding function.

Referring first to FIGS. 13 and 14, the reflective member 10 is fabricated in such a manner that a reflective layer is deposited, coated, or painted on the reflective profile surface 13 of the film member 11. The film member 11 may be made of two or more different layers. This is advantageous not only in manufacturing convenience but also in that the light is refracted at the boundary of the layers of different materials and finally the light emitted from the light emitting surface 20 is further enhanced to further enhance the luminance I have.

The film member 11 is formed by layering a reflection pattern forming layer 18 constituting the reflection profile surface 13 with a mold resin on a base film layer 17 having a predetermined thickness (about 0.5 mm) . ≪ / RTI > The base film layer 17 may be made of a flexible material such as polycarbonate (PC). Therefore, the film member 11 can be manufactured in the form of a flexible sheet.

The reflection pattern forming layer 18 may be formed by forming a soft synthetic resin on the base film layer 17 and then stacking the film by UV curing. A reflection layer may be coated on the reflection profile surface 13 where the reflection pattern forming layer 18 is laminated on the first surface of the base film layer 17. The reflective layers 14 and 15 can be coated by depositing silver or aluminum or the like, which forms a reflective surface well, or by applying reflective ink.

The base film layer 17 and the reflection pattern forming layer 18 may be made of the same material or different materials. According to the fourth embodiment, each material can be selected so that the refractive index N1 of the base film layer 17 is equal to or smaller than the refractive index N2 of the reflection pattern forming layer 18, that is, N1? N2 have.

According to the fourth embodiment, the reflection occurs at the back surface of the reflective surface. If the refractive index of the base film layer is greater than the refractive index of the reflective patterning layer, that is, N1 > N2, A part of the light incident on the pattern formation layer is larger than the critical angle and is not incident on the reflection pattern formation layer. Thus, the amount of light reflected on the light emitting surface 20 through the double reflection surface is reduced.

Even if the predetermined angle a formed by the reflecting member 10 with respect to the light emitting surface 20 becomes 0 degree, that is, even if the film member 11 and the light emitting surface 20 are parallel to each other, Plane light emission can be implemented more brighter. That is, in the above embodiments, the predetermined angle (a) is set to about 2 to 3 degrees in order to secure an angle of the light incident on the first reflective surface 14 to some extent. If the refraction occurs at the interface where the refractive index of the reflective pattern forming layer is larger than that of the base film layer, the angle of light incident on the first reflective surface 14 can be further secured by the refraction at the interface.

The first surface of the film member 11 in which the second surface of the film member 11 constitutes the light emitting surface 20 and in which the reflective surfaces 14 and 15 of the film member 11 are formed, Even if the light source 30 irradiates light in a direction parallel to the first surface and the second surface at the side of the film member 11 therebetween, refraction occurs, so that the reflection member is arranged at a predetermined angle It is possible to have an effect similar to the inclination.

The light source 30 may be a thin light source corresponding to the thickness of the film member, which may be realized by an LED. The light source 30 irradiates slightly diffused light rather than a completely parallel light source. Incident light 61, which first reaches the second surface of the film member 11, is totally reflected on the second surface, 17 and the reflection pattern forming layer 18.

And at the interface, the incident light 61 is refracted in the direction shown to reach the first reflective surface 14. The primary reflected light 62 reflected by the first reflecting surface 14 is again incident on the second reflecting surface 15 and the secondary reflected light 63 reflected by the second reflecting surface 15 is incident on the emitting surface 20 ) In a straight line. When the secondary reflected light is substantially perpendicularly incident on the light emitting surface 20, light that is reflected at the interface between the air (upper space of the second surface) and the second surface of the film member and returns back to the inside of the film member 11 Can be minimized, and accordingly, the brightness can be greatly increased. In other words, according to the present invention, even if a prism sheet (usually two prisms are stacked so as to form a vertical prism shape) which induces refraction of light to enhance the straightness of light in order to increase brightness, do.

The difference between the refractive index N1 of the base film layer 17 and the refractive index N2 of the reflective pattern layer 18 is preferably 0.69 or less, that is, N2 - N1 = 0.69. If the refractive index difference (N2 - N1) of the two layers 17 and 18 exceeds 0.69, refraction will occur largely, but rather the range in which double reflections can occur in the first reflective surface 14 and the second reflective surface 15 . That is, the refracted light of the incident light 61 incident on the first reflecting surface 14 becomes excessively large. In addition, when the difference between the two layers exceeds 0.69, the amount of light that passes through the interface between the two layers sharply decreases as the amount of reflection normally occurring at the interface between the two media increases.

Next, if the refractive index difference (N2 - N1) between the two layers 17 and 18 is less than 0.05, even if the refraction occurs at the interface between the two layers, the angle of refraction can not be secured, And the first surface are parallel to each other and the light source 30 illuminates the light horizontally, double reflection is not smoothly performed.

Figure 14 shows a reflective profile surface 13 in which the first reflective surface 14 is planar. As described above, the first reflective surface 14 serves to reflect the light incident from the light source to reach the second reflective surface 15. Considering that the intention of the present invention is to realize surface light emission, Even if the reflective surface 14 is formed flat, double reflections do not have a great influence. However, there is a tendency that the secondary reflected light 63 reflected by the second reflective surface 15 is somewhat diffused, as compared with the case where the first reflective surface 14 has a concave or convex curved surface, . Rather, if the first reflective surface 14 is made flat, the reflective member 10 can be manufactured more easily and the manufacturing cost can be greatly reduced.

Fig. 15 illustrates a structure formed between the double reflection patterns 14 and 15 in which the connection portions 16 described above are matched with each other as compared with Fig. A metal having a high reflectance may also be coated on the surface of the connecting portion 16. [ 15, when the incident light 61 emitted from the light source 30 reaches the connection portion 16 even if the connection portion 16 is not coated with a metal or the like having a high reflectance, (In the absence of a metal coating), reaches the second surface 20 of the film member 11, is totally reflected again on the second surface, and is irradiated on the reflection profile surface of the lower portion of the film member, Reflection.

The connection 16 can be used to adjust the distribution of the double reflective pattern to adjust the light distribution. By reducing the length or frequency of the connection part 16 as the distance from the light source 30 is reduced, the difference in the amount of double reflection occurring at a place far from or near the light source can be minimized.

16 illustrates that a film member 11 having a concave structure of both the first reflective surface 14 and the second reflective surface 15 is also applicable. In FIG. 17, the first reflective surface 14 is convex And the film member 11 having the concave structure of the second reflective surface is also applicable.

If the film member itself has the function of light-guiding as in the fourth embodiment, the surface-emitting illuminating device can be made thin as a film, and the light-emitting surface itself that is surface emitting can be flexibly deformed, .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the invention is not limited to the disclosed exemplary embodiments. It is obvious that a transformation can be made. Although the embodiments of the present invention have been described in detail above, the effects of the present invention are not explicitly described and described, but it is needless to say that the effects that can be predicted by the configurations should also be recognized.

10, 101, 102, 103, 104, 105: reflection member (film)
11: Film member
12: Mounting surface
13: reflective profile face
14: first reflective surface
15: second reflective surface
16: connecting surface
17: base film layer
18: reflective patterned layer
20: light emitting surface
30: Light source
31: Light emitting portion (LED)
32: substrate
33: Collector
34: Reflector
35: Lens
36: exit surface
40:
50: optical member
61, 611, 612, 613: incident light
62: primary reflected light
63, 631, 632, 633: secondary reflected light
70: fluid medium
80: Housing
81: Light source installation part
82: Reflecting member mounting face
84:
85: cover
90: Optical adhesive

Claims (20)

1. An illuminating device for illuminating a surface, comprising:
The illumination device comprises:
A reflection member (10) arranged at a predetermined angle (a) of 0 to 45 degrees with respect to the light emitting surface (20) that emits light; And
And a light source (30) for emitting light to the reflection member (10) between the light emitting surface and the reflection profile surface (13) of the reflection member (10)
The reflective member 10 comprises:
A film member (11) having a first surface having the reflective profile surface (13) and a second surface facing the first surface; And
And a first reflective surface (14) and a second reflective surface (15) alternately provided on the surface of the reflective profile surface (13) along the longitudinal direction of the film member,
The incident light 61 emitted from the light source 30 is incident on the first reflective surface 14,
Wherein the primary reflected light 62 reflected by the incident light 61 at the first reflective surface 14 is adjacent to the first reflective surface 14 and is closer to the light source 30 than the first reflective surface 14. [ Is incident on a second reflective surface (15) disposed closer to the second reflective surface (15)
Wherein the secondary reflected light (63) reflected by the primary reflected light (62) on the second reflective surface (15) crosses the incident light (61) and is emitted toward the light emitting surface (20) Emitting luminescent device.
The method according to claim 1,
Wherein the film member (11) is made of a flexible light-transmitting material.
The method of claim 2,
The film member 11 includes a base film layer 17 having a predetermined thickness,
And a reflective pattern layer (18) laminated on the surface of the base film layer (17) to form the reflective profile surface (13).
The method according to claim 1,
Characterized in that a metal or reflective ink is applied to the reflective profile surface (13) to form a first reflective surface (14) and a second reflective surface (15).
The method according to claim 1,
Characterized in that a connecting surface (16) is further provided between the first reflective surface (14) and the second reflective surface (15) alternately arranged.
The method according to claim 1,
The first reflective surface 14 comprises a convex, flat or concave surface profile as viewed from the direction in which light is irradiated,
Characterized in that the second reflective surface (15) comprises a profile of a concave curved surface when viewed in the direction in which the light is irradiated.
The method according to claim 1,
The incident light 61 is incident on the first reflective surface 14 through the medium towards the surface of the reflective profile surface 13,
The primary reflected light 62 is incident on the second reflective surface 15 toward the surface of the reflective profile surface 13 via the medium,
And the secondary reflected light (63) is emitted to the light emitting surface (20) through the medium.
The method of claim 7,
Wherein the medium is an air or fluid medium (70).
The method of claim 8,
The illumination device includes:
The light source 30 is arranged such that the light exit surface 36 of the light source 30 is disposed between a first end located close to the light emitting surface 20 and a second end distant from the light emitting surface, A mounting portion 81,
The reflection member 10 includes an emission surface 36 of the light source 30 provided in the light source attachment portion 81 and a reflection member installation surface 82 for fixing the emission surface 20 so as to face the light source 30,
And a housing (80) having a light emitting surface.
The method of claim 9,
The housing (80)
Further comprising a cover (85) that separates the medium from the exterior space of the illuminator and comprises a transparent material or a diffuser plate,
And the cover (85) forms a light emitting surface (20).
The method according to claim 1,
The incident light 61 is incident on the first reflective surface 14 toward the rear surface of the reflective profile surface 13 via the second surface of the film member 11 and the film member 11,
The primary reflected light 62 is incident on the second reflective surface 15 toward the back surface of the reflective profile surface 13 via the film member 11,
And the second reflected light (63) is emitted to the light emitting surface (20) through the film member (11) and the second surface.
The method of claim 11,
The surface-emitting illuminating apparatus further includes an optical member (50)
The optical member (50) comprises:
A light source mounting portion 81 on which light of the light source is incident, facing the emitting surface 36 of the light source 30;
A reflective member mounting surface (82) facing the second surface of the film member (11); And
And the light emitting surface (20) from which light reflected by the reflection member (10) is emitted,
The light source mounting portion 81 and the reflecting member mounting surface 82 are adjacent to each other,
The light source mounting portion 81 and the light emitting surface 20 are adjacent to each other
Wherein the light emitting device is a light emitting device.
The method according to claim 1,
The incident light 61 is incident on the film member 11 through the side surface of the film member 11 and is reflected by the film member 11 toward the back surface of the reflection profile surface 13 toward the first reflective surface 14 ),
The primary reflected light 62 is incident on the second reflective surface 15 toward the back surface of the reflective profile surface 13 via the film member 11,
And the second reflected light (63) is emitted to the light emitting surface (20) through the second surface of the film member (11).
The method of claim 3,
The incident light 61 is incident on the base film layer 17 through the side surface of the base film layer 17 and is reflected by the base film layer 17 and the reflection pattern shape Is incident on the reflective pattern layer 18 through the interface of the layer 18 and is incident on the first reflective surface 14 toward the back of the reflective profile surface 13 via the base film layer 17 ,
The primary reflected light 62 is incident on the second reflective surface 15 toward the back of the reflective profile surface 13 via the reflective pattern layer 18,
And the second reflected light (63) is emitted to the light emitting surface (20) through the second surface of the film member (11).
The method according to claim 13 or 14,
Wherein the predetermined angle (a) is 0 degrees.
The method according to claim 13 or 14,
And the second surface is a light emitting surface (20).
The method of claim 12 or 13 or 14,
Wherein the light emitting surface (20) comprises a diffusion plate.
15. The method of claim 14,
The refractive index N1 of the base film layer 17 and the refractive index N2 of the reflective pattern layer 18 are
N1? N2
Lt; RTI ID = 0.0 > 1, < / RTI >
19. The method of claim 18,
The refractive index N1 of the base film layer 17 and the refractive index N2 of the reflective pattern layer 18 are
N2 - N1? 0.69
Lt; RTI ID = 0.0 > 1, < / RTI >
19. The method of claim 18,
The refractive index N1 of the base film layer 17 and the refractive index N2 of the reflective pattern layer 18 are
0.05? N2 - N1
Lt; RTI ID = 0.0 > 1, < / RTI >

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