Down lamp

Abstract

The utility model discloses a down lamp which comprises a shell (502) with an opening in one end. The LED PCB is arranged in the shell and comprises a first group of LEDs (514) arranged on the periphery of the LED PCB and a second group of LEDs (516) arranged in the middle of the LED PCB; a front ring (510) disposed on the LED PCB to form an optical barrier between the first set of LEDs (514) and the second set of LEDs (516); at least one diffuser disposed on the open end of the housing, comprising: a first diffuser portion (508) disposed above the first group of LEDs (514) to allow light from the first group of LEDs (514) to exit in a peripheral direction; and a second diffuser portion (512) disposed above the second group of LEDs (516) to allow light from the second group of LEDs (516) to exit.

Description

Technical Field

[0001] The present application relates to a downlight for generating illumination light, and in particular to illumination light that realizes multiple different functions by using the same downlight. Background Art

[0002] Traditionally, multiple luminaires are used to provide different lighting. For example, one luminaire may provide full illumination (also known as a "task light"), while another luminaire may provide a night light. However, using multiple luminaires may face challenges related to cost and installation space. Some have attempted to provide multifunctional lighting with a single luminaire.

[0003] There are linear lights in the art that provide multifunctional lighting. Such lights typically include two compartments, and a separate light emitting element is housed in each compartment. The two light emitting elements may be configured to emit light having different characteristics and possibly in two different directions. Similar lamps may also be used for other types of lamps, such as, but not limited to, T-bulbs, or any other LED lamp that is compatible with a conventional incandescent lamp socket.

[0004] A downlight refers to a lamp that is housed in a ceiling and is configured to emit light downward. Typically, the downlight is embedded in the ceiling and provides functional lighting. Attempts have been made to provide multifunctional lighting with downlight-type lamps. In US20230400163A1, a downlight fixture that provides two lights of different characteristics is proposed. The first light is emitted from a central portion of the downlight lighting device, and the second light is emitted via a light guide decorative member positioned around at least a portion of the reflector. The second light source is positioned to emit the second light toward a narrow edge of the light guide decorative member. The light from the second light source is emitted in almost the same direction as the first light. In addition, in such a lighting fixture, since the surrounding is covered by a diffuser plate, the recess of the ceiling can be seen.

[0005] There is a need for improved downlighting lighting designs that are capable of producing both task light and ambient light without compromising the aesthetics of the recessed downlighting lighting. Utility Model Content

[0006] One object of the present application is to provide lighting from a downlight. In particular, the present application relates to a technology for providing multifunctional lighting from a downlight.

[0007] According to one aspect of the present application, a lamp or luminaire in the form of a downlight is disclosed. The downlight comprises a housing having an opening at one end. The housing of the downlight is generally designed to be arranged in a surface. In particular, the housing of the downlight is partially or almost completely contained in a false ceiling or a surface. The housing of the lamp is inserted into the surface using a spring mechanism or any other similar mechanism. The mechanism is also designed to facilitate removal of the housing from the surface when replacing or repairing the downlight.

[0008] The downlight also includes a light emitting diode (LED) printed circuit board (PCB) disposed in the housing. The LED PCB includes a first group of LEDs disposed at the periphery of the LED PCB and a second group of LEDs disposed at the center of the LED PCB. In one embodiment, the first group of LEDs and the second group of LEDs are arranged in a circular pattern. In an alternative embodiment, the first group of LEDs can be arranged in groups at the outermost periphery on the PCB. Similarly, the second group of LEDs can be arranged in any other pattern in the central portion of the PCB. The first group of LEDs can be separated from the second group of LEDs by a clear separation area on the PCB. It can be noted that the first group of LEDs is configured to generate ambient light and the second group of LEDs is configured to generate working light.

[0009] It can be noted that the first group of LEDs and the second group of LEDs can include LEDs capable of emitting white light. Alternatively, the first group of LEDs and the second group of LEDs can include red, green and blue LEDs arranged in groups. This arrangement can generate white light and colored light from the first group of LEDs and the second group of LEDs.

[0010] The downlight includes at least one diffuser disposed on the open end of the housing, which includes a first diffuser portion, the first diffuser being arranged above the periphery of the LED PCB and being configured to allow light from the first group of LEDs in a peripheral direction. The at least one diffuser also includes a second diffuser portion, the second diffuser being disposed on the open end of the housing and being configured to allow light from the second group of LEDs. In one embodiment, the first diffuser and the second diffuser are made of a light-transmissive polymer material, such as a polycarbonate material. It can also be noted that the first and second diffusers can be made of any other suitable alternative material that meets the transparency requirements and allows light to pass through them.

[0011] In one embodiment, the downlight comprises a diffuser, wherein the first diffuser part and the second diffuser part are integrated on the diffuser. In another embodiment, the downlight comprises a plurality of diffusers, which are composed of separate first diffuser parts and second diffuser parts.

[0012] The downlight also includes a front ring disposed on the LED PCB to form an optical barrier between the first group of LEDs and the second group of LEDs. In one embodiment, the front ring is made of a reflective polymer material, such as a polycarbonate material. In alternative embodiments, any other reflective material may be used in the front ring. The purpose of the front ring is to reflect light from the second group of LEDs toward the second diffuser portion and to reflect light from the first group of LEDs toward the first diffuser portion. In a specific embodiment, light from the second group of LEDs is reflected by the inner surface of the front ring toward the second diffuser portion. In the same embodiment, light from the first group of LEDs is reflected by the outer surface of the front ring toward the first diffuser portion.

[0013] The downlight may also include an LED driver configured to drive a first group of LEDs and a second group of LEDs. Specifically, the LED driver is configured to drive the two groups of LEDs independently. In one embodiment, the LED driver may be configured to operate the first group of LEDs for a first duration and to operate the second group of LEDs for a second duration. The first duration and the second duration may be disjoint and non-overlapping. Alternatively, the first duration and the second duration may partially overlap. In one embodiment, a single switch may be used to operate the LED driver to turn on the first group of LEDs and the second group of LEDs. In an exemplary embodiment, the LED driver may be disposed on an LED PCB.

[0014] In another aspect of the specification, a method of generating light from a downlight is disclosed. The method includes directing light from a first group of light emitting diodes (LEDs) disposed on an LED printed circuit board (PCB) contained within a housing through a first diffuser portion disposed above a periphery of the LED PCB. Light emitted from the lamp in a peripheral direction generates ambient light. The method also includes directing light from a second group of LEDs disposed on the LED PCB through a second diffuser portion disposed on an open end of the housing to generate operating light.

[0015] In one embodiment, directing light from the first group of LEDs and the second group of LEDs is performed in mutually exclusive time slots. Alternatively, in another embodiment, directing light from the first group of LEDs and the second group of LEDs is performed in different time slots that do not overlap. Light may also be generated from the first group of LEDs and the second group of LEDs in partially overlapping time slots. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A prior art downlight fixture is shown;

[0018] Figure 2 and Figure 3 depicts a perspective view of a downlight fixture according to the present application;

[0019] Figure 4-5 The working light and ambient light generated by the downlight fixture according to the present application are shown;

[0020] Figure 6 to Figure 9 Ambient light with various color characteristics according to the present application is shown;

[0021] Fig.10 The downlight structure according to one embodiment of the present application is shown;

[0022] Fig.11 Shows Fig.10 LED arrangement on the LED PCB;

[0023] Fig.12 It shows the light beam produced by the working light according to the present application;

[0024] Fig.13 shows a beam of ambient light produced according to the present application;

[0025] Fig.14 The downlight structure according to another embodiment of the present application is shown;

[0026] Fig.15 Show Fig.14 A front view of a downlight of an embodiment; and

[0027] Fig.16 Show Fig.15 Middle AA section. DETAILED DESCRIPTION

[0028] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0029] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0030] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the feature. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] Embodiments of downlight luminaires disclosed herein are configured to provide a variety of lighting conditions for an interior space. Specifically, the present application relates to a downlight that provides ambient light from a periphery and working light from a central portion.

[0033] The term "downlight" refers to the task light produced by a conventional downlight fixture (also referred to herein as a "task light"). The term "ambient light" refers to the light emitted by a fixture for entertainment or relaxation purposes. The ambient light referred to in this specification can have a lower color temperature than the color temperature of the task light. In addition, the ambient light can have a specific hue and brightness compared to the higher color temperature and brighter light used for task lights. However, task light can also be colored light, and ambient light can also be white light. The term "diffuser" as used herein refers to a light-transmissive cover used to distribute and mix light from LED elements to provide a uniform light output.

[0034] Figure 1 A conventional downlight luminaire 100 is shown. The downlight luminaire 100 includes a housing 102, 104 for housing an LED PCB and an LED driver. At least a portion of the housing is disposed in an opening in a surface (such as, but not limited to, a false ceiling). The downlight luminaire includes a diffuser located in front of the light engine (PCB, driver, and LED components) and mounting mechanisms 106, 108, 110 for inserting into a surface to mount the downlight.

[0035] Figure 2 and 3 A perspective view of a downlight type lighting device according to the present application is depicted. Figure 2 The front view of the downlight of the present application is shown. The peripheral area of ​​the ring and the central luminous area are covered with an opaque material. The opaque area covers the opening of the ceiling, enhancing the aesthetics of the downlight. The locking mechanism can also be seen in the figure. Figure 3 A rear perspective view of a downlight fixture of the present application is shown. The top portion of the housing inserted into the ceiling opening can be seen in the figure. The locking mechanism visible in the perspective view is a spring-based locking mechanism.

[0036] Figure 4 and Figure 5The working light and the ambient light generated by the downlight lighting device according to the present application are shown. Figure 4 A downlight 300 is shown providing task light illumination. In the embodiment shown, the task light is a bright white light provided by a second set of LEDs arranged on a central portion of the LED PCB. Figure 5 A downlight of the present application is shown providing ambient light illumination 350. In the embodiment shown, the ambient light is warm colored light (shown in shades of grey) provided by a first set of LEDs arranged on the periphery of the LED PCB.

[0037] Figure 6 to Figure 9 Ambient light of various colors according to the present application is shown. Figure 6 Red ambient light 400 is shown emitted from the first diffuser. Figure 7 Gold ambient light 420 is shown emitted from the first diffuser. Figure 8 Green ambient light 440 is shown emitted from the first diffuser. Fig. 9 Blue ambient light 460 emitted from the first diffuser is shown. It can be noted herein that although the ambient light is multi-colored as described herein, the colors are represented in shades of gray rather than actual colors in the illustrated embodiment. In one embodiment, the colored lights 400, 420, 440, 460 are produced by the same first group of LEDs. The actual color provided by the first group of LEDs depends on the driver signal, which in turn is specified by the user. In these figures, there is no work light and the second group of LEDs is turned off.

[0038] Fig.10 An assembly 500 of a downlight lighting device according to one embodiment of the present application is shown. The downlight lighting device comprises a housing 502 having an opening on the bottom side to accommodate other components of the downlight lighting device. The housing is also provided with a component 504 for mounting the downlight luminaire in a surface. In the embodiment shown, the mounting component 504 is a spring mechanism that enters the interior of the surface and, after expansion, rests on an interior (or top) portion of the surface supporting the downlight lighting device. The downlight luminaire also comprises an LED PCB 506 on which a first group of LEDs and a second group of LEDs are arranged. Fig.11The first group of LEDs is shown by reference numeral 514 and the second group of LEDs is shown by reference numeral 516. The LED PCB 506 also includes an LED driver configured to operate the first group of LEDs 514 and the second group of LEDs 516. In one embodiment, the first group of LEDs 514 is disposed at the periphery of the LED PCB 506 and the second group of LEDs 516 is disposed at the center of the LED PCB 506. The downlight fixture also includes a first diffuser 508 made of a light-transmitting material, allowing light to be irradiated in a peripheral direction. The first diffuser 508 has openings at both ends. The top opening is configured to accommodate the LED PCB so that the first group of LEDs is covered by the side of the first diffuser 508. The downlight fixture also includes a front ring 510 made of a reflective material. Similar to the first diffuser 508, the front ring 510 also has openings at the top and bottom sides. The top side of the front ring 510 is disposed on the LED PCB 506 so that the front ring 510 optically separates the first group of LEDs and the second group of LEDs. To achieve this, the circumference of the front ring 510 is selected based on the placement of the first group of LEDs and the second group of LEDs. When assembled, the front ring 510 is received by the first diffuser 508 and forms an optical barrier between the first group of LEDs and the second group of LEDs. The downlight fixture also includes a second diffuser 512 configured to cover the front ring 510 and the opening of the housing 502.

[0039] Fig.12 Operation 600 of producing working light according to the downlight lighting device of the present application is shown. In this embodiment, the first group of LEDs is in an "off" state, while the second group of LEDs is in an "on" state. The LED driver is configured to power the second group of LEDs located in the center of the LED PCB 604. The light beam 608 from the LED PCB 604 is directed to the front ring. The light beam 608 is reflected by the inner surface of the front ring. In addition, the light beam reflected by the front ring 614 is directed to and passes through the second diffuser 616.

[0040] Fig.13 Operation 650 of generating working light according to a downlight lighting device of the present application is shown. In this embodiment, a first group of LEDs is in an "on" state and a second group of LEDs is in an "off" state. The LED driver is configured to power a first group of LEDs placed at the periphery of an LED PCB 652. A light beam 656 from the LED PCB 652 is directed toward the front ring. The light beam 656 is reflected by the outer surface of the front ring 658. In addition, the light beam reflected by the front ring 658 is directed toward the first diffuser 654 and passes through the first diffuser 654.

[0041] The present disclosure also includes a method of generating light from a downlight lighting device. The method includes a first step of directing light from a first group of light emitting diodes (LEDs) disposed on an LED printed circuit board (PCB) through a first diffuser portion disposed above a periphery of the LED PCB, wherein the emitted light is emitted from the luminaire in a peripheral direction to generate ambient light. The method also includes a second step of directing light from a second group of LEDs disposed on the LED PCB through a second diffuser disposed on an open end of a housing to generate operating light.

[0042] In one embodiment, the steps of directing light from the first group of LEDs 514 and directing light from the second group of LEDs 516 are performed in mutually exclusive time slots. Alternatively, in another embodiment, the steps of directing light from the first group of LEDs and directing light from the second group of LEDs are performed in different time slots that do not overlap. Light may also be generated from the first group of LEDs and the second group of LEDs in partially overlapping time slots.

[0043] Fig.14 A component 500 of a downlight lighting device according to another embodiment of the present application is shown. Fig.10 The difference between the embodiment of the present invention and the embodiment of the present invention is that the diffuser 505 integrates the first diffuser 508 and the second diffuser 512 (the two diffuser parts are virtually divided by a dotted line in the figure, and the line does not actually exist). The front ring 510 is also covered by the diffuser 505. The front ring 510 is provided with two mounting lugs 511, which are connected and fixed to the mounting seat (not shown) in the housing 502.

[0044] exist Fig.15 In the front view of FIG. 5 , the diffuser 505 is removed, so that the second group of LEDs 516 located in the middle of the LED PCB 506 can be seen. The first group of LEDs 514 at the periphery are blocked by the front ring 510 and are therefore not visible.

[0045] Fig.16 yes Fig.15 It can be seen that the light emitted by the first group of LEDs 514 is emitted from the first diffuser 508 , and the light emitted by the second group of LEDs 516 is emitted from the second diffuser 512 .

[0046] Although the downlight lighting device has been described in detail in conjunction with only a limited number of embodiments, it should be readily understood that the present specification is not limited to such disclosed embodiments. Rather, the downlight lighting device may be modified to incorporate any number of variations, changes, substitutions, or equivalent arrangements not heretofore described but commensurate with the spirit and scope of the claims. Additionally, although various embodiments of the downlight lighting device have been described, it should be understood that aspects of the present specification may include only some of the described embodiments. Accordingly, the present specification should not be considered limited by the foregoing description, but only by the scope of the appended claims.

[0047] Although some specific embodiments of the present disclosure have been shown in detail by examples, it should be understood by those skilled in the art that the above examples are intended to be illustrative only and not to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments can be modified without departing from the scope and essence of the present disclosure. The scope of the present disclosure is defined by the appended claims. In the specification and the claims below, unless the context otherwise requires, the terms "include" and "comprise" are understood to include the components or groups of components described, but do not exclude any other components or groups of components. References to any prior art in this specification are not and should not be regarded as admitting that these prior arts constitute common knowledge.

Claims

1. A downlight, characterized in that: include: A housing (502) having an opening at one end; A light emitting diode (LED) printed circuit board (506) disposed in the housing, the LED PCB, comprising a first group of LEDs (514) disposed at the periphery of the LED PCB and a second group of LEDs (516) disposed at the middle of the LED PCB; a front ring (510) disposed on the LED PCB to form an optical barrier between the first group of LEDs (514) and the second group of LEDs (516); At least one diffuser, disposed on the open end of the housing, comprising: A first diffuser portion (508) disposed above the first group of LEDs (514) to allow light from the first group of LEDs (514) to be emitted in a peripheral direction; and A second diffuser portion (512) is disposed above the second group of LEDs (516) to allow light from the second group of LEDs (516) to exit.

2. The downlight according to claim 1, characterized in that: The housing (502) is designed to be disposed within a surface.

3. The downlight according to claim 1, characterized in that: The first group of LEDs (514) and the second group of LEDs (516) are arranged in a circular pattern.

4. The downlight according to claim 1, characterized in that: The first diffuser portion (508) and the second diffuser portion (512) are made of a light-transmissive polymer material.

5. The downlight according to claim 1, characterized in that: The front ring (510) is made of a reflective polymer material.

6. The downlight according to claim 1, characterized in that: The first set of LEDs (514) is configured to generate ambient light, and the second set of LEDs is configured to generate operating light.

7. The downlight according to claim 1, characterized in that: An LED driver is also included to independently drive the first group of LEDs (514) and the second group of LEDs (516).

8. The downlight according to claim 1, characterized in that: The outer surface of the front ring (510) is configured to reflect light emitted by the first group of LEDs (514) toward the first diffuser portion (508), and the inner surface of the front ring (510) is configured to reflect light emitted by the second group of LEDs (516) toward the second diffuser portion (512).

9. The downlight according to claim 1, characterized in that: The at least one diffuser is a diffuser on which the first diffuser part and the second diffuser part are integrated; or the at least one diffuser comprises separate first diffuser part and second diffuser part.

10. The downlight according to claim 1, characterized in that: The first group of LEDs (514) is configured to emit a light beam of at least one color among a plurality of colors.

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