Indirect LED lihting apparatus having a reflection configuration

Abstract

The present invention relates to an indirect lighting apparatus using an LED, comprising: a case unit provided along the perimeter of the upper part of a wall surface, and having a light emitting opening on a side opposite to the wall surface; a substrate mounted with an LED and provided at the innermost side of the inner bottom surface of the case unit; a light distributing unit for distributing light to the ceiling through the light emitting opening by reflecting the light emitted from the LED; and a cover unit for covering the light emitting opening of the case unit. The present invention uses a simple structure so that the apparatus is fixedly provided on the wall surface, and can be used as main lighting or mood lighting by providing the distributed light capable of selectively illuminating the entire ceiling.

Claims

1. An indirect lighting apparatus using a light emitting diode (LED), comprising: a case unit configured to be installed a wall surface, wherein the case unit has a bottom surface, a top surface, a vertical surface that is connected to the bottom surface and the top surface, and a light emitting opening formed on a side opposite to the wall surface; a substrate installed at an innermost side of an inner bottom surface of the case unit, with an LED mounted on the substrate; a light distribution unit separately provided within the case unit and configured to reflect light emitted from the LED and distribute the light onto a ceiling through the light emitting opening, wherein a lower end of the light distribution unit is fixed to a lower end of an inner vertical surface of the case unit and an upper end of the light distribution unit is fixed to an outermost end of an inner top surface of the case unit, and wherein the light distribution unit includes a plate having a concave lower surface with a predetermined curvature such that the light emitted from the LED is distributed onto the ceiling; and a cover unit configured to cover the light emitting opening of the case unit.

2. The indirect lighting apparatus according to claim 1, wherein the light distribution unit comprises a plate having a concave lower surface with a predetermined curvature such that the light emitted from the LED is distributed onto the ceiling, and includes a plurality of segmentations having different inclinations or curvatures.

3. The indirect lighting apparatus according to claim 2, wherein the substrate mounted with the LED is installed on the inner bottom surface of the case unit at a position distant from the light emitting opening.

4. The indirect lighting apparatus according to claim 3, wherein a direct current (DC) power supply is applied to the substrate mounted with the LED, and wherein dimming control and/or color temperature control of the LED is performed by controlling the DC power supply using a controller.

5. The indirect lighting apparatus according to claim 1, wherein the substrate mounted with the LED is installed on the inner bottom surface of the case unit at a position distant from the light emitting opening.

6. The indirect lighting apparatus according to claim 5, wherein a direct current (DC) power supply is applied to the substrate mounted with the LED, and wherein dimming control and/or color temperature control of the LED is performed by controlling the DC power supply using a controller.

7. The indirect lighting apparatus according to claim 1, wherein the substrate mounted with the LED is installed on the inner bottom surface of the case unit at a position distant from the light emitting opening.

8. The indirect lighting apparatus according to claim 7, wherein a direct current (DC) power supply is applied to the substrate mounted with the LED, and wherein dimming control and/or color temperature control of the LED is performed by controlling the DC power supply using a controller.

9. The indirect lighting apparatus according to claim 1, wherein the case unit has a hollow hexahedral structure that is open on one surface thereof to form the light emitting opening.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) FIG. 1 is a view illustrating installation of an indirect lighting apparatus using an LED according to an embodiment of the present disclosure.

(2) FIG. 2 is an exploded perspective view illustrating the indirect lighting apparatus using the LED according to the embodiment of the present disclosure.

(3) FIG. 3 is a sectional view illustrating the configuration of the indirect lighting apparatus using the LED according to the embodiment of the present disclosure.

(4) FIG. 4 is a schematic view illustrating light distribution of the indirect lighting apparatus using the LED according to the present disclosure.

(5) FIG. 5 is a sectional view illustrating the configuration of a light distribution unit of an indirect lighting apparatus using an LED according to another embodiment of the present disclosure.

DETAILED DESCRIPTION

(6) Hereinafter, an indirect lighting apparatus using an LED according to the present disclosure will be described in detail with reference to the attached drawings.

(7) FIG. 1 is a view illustrating installation of an indirect lighting apparatus using an LED according to an embodiment of the present disclosure, FIG. 2 is an exploded perspective view illustrating the indirect lighting apparatus using the LED according to the present disclosure, and FIG. 3 is a sectional view illustrating the configuration of the present disclosure.

(8) Referring to FIGS. 1 to 3, the indirect lighting apparatus using the LED according to the embodiment of the present disclosure includes: a case unit 10 installed along the perimeter of an upper part of a wall surface 1, and having a light emitting opening 11 on a side thereof opposite to the wall surface 1; a substrate 20 mounted with an LED, and provided at the innermost side of an inner bottom surface of the case unit 10; a light distribution unit 30 which reflects light emitted from the LED 21 and distributes the light to a ceiling through the light emitting opening 11; and a cover unit 40 which covers the light emitting opening 11 of the case unit 10.

(9) Hereinbelow, the configuration and operation of the indirect lighting apparatus using the LED according to the embodiment of the present disclosure having the above-mentioned configuration will be described in more detail.

(10) The case unit 10 has a hollow hexahedral case structure having a long length and is installed, making contact with the upper part of the wall surface 1. The case unit 10 is installed such that the light emitting opening 11 faces the side opposite to the wall surface 1.

(11) It is preferable that the case unit 10 be installed such that an upper corner thereof come into contact with the wall surface 1 and the ceiling or be disposed at a position below the ceiling by 5 cm to 15 cm.

(12) The installation position of the case unit 10 is a position at which light of from the LED 21 that is distributed through the light emitting opening 11 can be easily illuminated onto the ceiling.

(13) A plurality of case units 10 may be installed on all wall surfaces 1 along the entirety of the perimeter of the ceiling, or may be installed on three wall surfaces 1 other than one side wall surface. Although, in this embodiment, there is illustrated the case which the case unit 10 has a hexahedral structure, the present disclosure is not limited to this. That is, the case unit 10 may be embodied in various shapes. However, the hexahedral structure is most advantageous in terms of the production cost and ease of manufacture.

(14) A plurality of LEDs 21 are mounted on the substrate 20. The substrate 20 is fixed on the inner bottom surface 12 of the case unit 10 at the innermost position.

(15) The reason why the substrate 20 mounted with the LEDs 21 is disposed at the innermost position is because distribution of light to the ceiling is facilitated, and light of the LEDs 21 can be prevented from being directly applied to the eyes of a user in consideration of the fact that, if the light of the LED 21 is directly applied to the eyes of the user, only a corresponding portion may look excessively bright.

(16) Power is supplied to the substrate 20 from a DC power supply embedded in the wall surface 1. A controller 50 for controlling the DC power supply is provided on the wall surface 1. Dimming control and/or color temperature control of the LEDs 21 is possible by controlling the DC power supply using the controller 50.

(17) As such, by controlling the LEDs 21, the entirety of the ceiling may be selected as a light applied area so that the lighting apparatus can be used for main lighting, or only portion of the ceiling that is adjacent to the wall surface 1 may be used as a light applied area so that mood lighting can be provided.

(18) Light emitted from the LEDs 21 is reflected by the light distribution unit 30 having an arc-shaped cross-section and applied to the ceiling through the light emitting opening 11.

(19) The lower surface of the light distribution unit 30 is a reflective surface and has a curved shape with a predetermined curvature. A light distribution pattern along which light is distributed onto the ceiling is formed by the curvature.

(20) A lower end of the light distribution unit 30 is fixed to a lower end of an inner vertical surface 13 of the casing unit 10, and an upper end thereof is fixed to a portion of the casing unit 10 over the light emitting opening 11.

(21) As shown in the sectional view of FIG. 3, the light distribution unit 30 is disposed in a diagonal direction of the case unit 10 and has an arc shape with a predetermined curvature such that the lower surface thereof is concave.

(22) FIG. 4 is a schematic view illustrating the light distribution of the indirect lighting apparatus using the LED according to the present disclosure.

(23) Referring to FIG. 4, in the indirect lighting apparatus using the LED according to the present disclosure, distributed light spreads widely and is applied to the ceiling. The distributed light that is applied to the ceiling is reflected by the ceiling and is indirectly illuminated into the room.

(24) In more detail, light emitted from the plurality of LEDs 21 mounted on the substrate 20 is reflected by the light distribution unit 30, and some of the reflected light is directly distributed onto the ceiling through the light emitting opening 11, and the other reflected light is reflected by the inner bottom surface 12 of the case unit 10 again and distributed onto the ceiling or reflected by the light distribution unit 30 again and then distributed onto the ceiling.

(25) The light of the LEDs 21 that has been distributed onto the ceiling is reflected by the ceiling again and then illuminated into the room.

(26) If the LEDs 21 is controlled by the controller 50 such that the brightness thereof is increased, the brightness of light that is distributed onto the ceiling is also increased. Thereby, the present disclosure that is used for indirect lighting may be used for main lighting.

(27) Furthermore, if the LEDs 21 is controlled by the controller 50 such that the brightness thereof is reduced, there is a clear difference in light quantity between the perimeter of the ceiling that is adjacent to the wall surface 1 and the central portion of the ceiling. Therefore, the present disclosure can provide mood lighting since light is distributed onto only the portion of the ceiling that is adjacent to the wall surface 1.

(28) FIG. 5 is a sectional view illustrating the configuration of a light distribution unit 30 of an indirect lighting apparatus using an LED according to another embodiment of the present disclosure.

(29) Referring to the sectional view of FIG. 5, the light distribution unit 30 includes a plurality of segmentations P1 to P5 having different curvatures. Depending on the curvatures and angles of the respective segmentations P1 to P5, distributed light may be applied farther to the ceiling. Therefore, light may be easily incident on the central portion of the ceiling.

(30) Each of the segmentations P1 to P5 may have a curved surface or an inclined planar surface.

(31) Referring again to FIG. 4, the cover unit 40 is formed of a transparent plate. The cover unit 40 can prevent light emitted from the LEDs 21 from being directly distributed depending on the positions of the LEDs 21 and the structure of the light distribution unit 30, in a similar manner to that described above, thus preventing the user from being dazzled. Therefore, intended lighting is achieved without use of a separate lens for surface emitting. Consequently, a reduction in light efficiency can be prevented.

(32) While various embodiments have been described above, it will be understood to those skilled in the art that the embodiments described are by way of example only. Accordingly, the disclosure described herein should not be limited based on the described embodiments.