Indirect lighting installation with symmetrical light sources

Abstract

The present disclosure relates to an indirect lighting device, comprising a light source assembly, a reflector structure assembly, a bottom structure assembly and an appearance structure assembly. The direct light from the light source assembly symmetrically illuminates the inner surface of the reflector structure assembly and is reflected and diffusely reflected, and then emitted from the light outlet of the bottom structure assembly. The direct light of the light source assembly is invisible. The present disclosure converts the hot spot direct light of the light source assembly into softer light on the surface of the light source, and the efficient reflector structure assembly enables the indirect lighting device to achieve high light efficiency at the same time.

Description

Technical Field

[0001] The present disclosure relates to the technical field of indirect lighting devices. Background Art

[0002] At present, the light output type of lighting devices is basically direct light, and some use side light. Of course, there are few indirect lighting devices on the market that use bottom light and reflective coatings to reflect light. The light source of the direct light-emitting lighting device is concentrated on the upper part of the device, and the light source is densely concentrated in a point area or a strip area. The light source area is relatively small and the brightness is high, which will increase the glare of the human eye. When the human eye looks directly at it, it will be easily irritated. In addition, most direct light-emitting lighting devices will install a diffuser, grille or fog cover at the light outlet to reduce the glare value, but these additional devices will block and lose part of the light.

[0003] The principle of side-emitting lighting devices is to place the light source on the side, guide and reflect the light through the light guide plate and reflector, and then emit it through the diffuser. Side-emitting lighting devices usually require a multi-layer structure design, with a large loss of light efficiency and the durability of the light guide plate is also average.

[0004] Existing indirect lighting fixtures achieve reflective design by spraying reflective coating on the inner surface of the external components. The current reflective coating has low light reflection efficiency and the optical structure is not optimized, resulting in low light efficiency of the entire lamp. Indirect lighting fixtures are not common in the market because most fixtures require the use of lenses or diffusers.

[0005] Therefore, the market is in urgent need of developing a type of lighting device that can achieve high light extraction efficiency, has no strong light spots, no direct light, is eye-friendly, and can reduce glare.

[0006] As described in U.S. patents, various different indirect lighting configurations are used in the industry. For example, in U.S. Patent No. 8,579,473, entitled "Indirect lighting device" issued on November 12, 2013 by Holten, the inventors describe: "The lighting device also includes a specular reflective portion (43) as a part of the reflective screen, the specular reflective portion is concave, and is used to reflect at least a portion of the light emitted by the light source to the diffuse reflective portion (42) of the reflective screen."

[0007] Furthermore, for example, in Lavin's U.S. Pat. No. 10,208,905, issued on February 19, 2019, entitled "Recessed Lighting Device for Effectively Providing Aesthetically Pleasing Indirect Lighting," and U.S. Pat. No. 10,760,749, issued on September 1, 2020, entitled "Recessed Lighting Device for Effectively Providing Aesthetically Pleasing Indirect Lighting," the inventors describe: "A recessed lighting device configured to provide indirect lighting to an area. The recessed lighting device includes a decorative component, a reflector connected to the decorative component, and an annular ring including a plurality of light emitting diodes (LEDs). The decorative component has an outer wall and an inner wall spaced radially inward from the outer wall, and defines an annular groove between the outer wall and the inner wall. The reflector includes a patterned reflective surface. The annular ring is disposed within the annular groove of the decorative component. The LED is configured to emit light toward the reflector so that the reflector changes the direction of the light to deliver the indirect light to the area."

[0008] In another example shown in U.S. Patent No. 10,801,695, entitled “Lamp,” issued on October 13, 2020, the inventors describe: “The reflector (110) is made of a diffuse reflective material, is a curved surface formed by translating an elliptical arc, and has a light outlet (114), the inner surface of which is a reflective surface (112). The light source assembly (120) is fixed to one end of the reflective surface (112), and the angle between the tangent line at the intersection of the central light emitted therefrom and the reflective surface (112) and the central light is 130° to 170°.”

[0009] In U.S. Patent No. 7,922,354, entitled “Solid State Lighting Device,” issued on April 12, 2011, the inventors describe: “A high performance, high efficiency solid state electronic lighting device having a sealed device body for use outdoors or in environments requiring an IP-rated sealed device, using light emitting diodes to generate light from alternating current that operates on demand based on occupancy, ambient light levels, and facility load requirements.”

[0010] Another important example is shown in U.S. Patent No. 8,905,575, entitled "Troffer-type lighting device with specular reflector", issued on December 4, 2014, where the inventors describe: "An elongated heat sink with a light source mounting surface extends longitudinally along the device. To facilitate heat dissipation, a portion of the heat sink is exposed to the indoor environment. An elongated specular reflector also extends along the device adjacent to the heat sink. The heat sink and the specular reflector are mounted in a manner that maintains a spatial relationship. Some light from the light source is directly incident on the specular reflector and is redirected to the rear surface. The rear surface defines a light emitting surface that directly receives light from the light source and redirected light from the specular reflector."

[0011] As described in U.S. Patent No. 9,699,856, entitled “Upgradeable Lighting Device” issued on July 4, 2017, the inventors describe “a lens supported by and connected to an outer frame. A solid-state light source is mounted on the outer frame and at least partially surrounded by the lens such that at least a portion of light provided by the solid-state light source is transmitted through the lens toward an area of ​​interest.

[0012] As described in U.S. Patent No. 2012 / 0051041, entitled “Trophy Luminaire,” issued on March 1, 2012, the inventors describe a “trophy luminaire comprising a light engine unit having a perimeter surrounded by a reflective disk. A back reflector defines a reflective interior surface of the light engine.”

[0013] In U.S. Patent No. 10,208,933, entitled “Adjustable Lighting Device and Lighting System,” issued on February 19, 2019, the inventors describe “a housing that is selectively adjustable to a selected housing length and mountable to a surface. A tray mountable to the housing includes panels that are selectively adjustable relative to each other to a selected tray length. Multiple electroluminescent sources are located on each panel to provide uniform illumination throughout the lighting device. Overlap of the panels changes the length of the tray and blocks light from a light source on one panel through the opposing panel.”

[0014] In U.S. Patent No. 10,584,860, titled “Linear Lighting Device with Interchangeable Light Engine Units,” issued on March 10, 2020, the inventors describe “the lighting subassembly includes a light source and optical elements that adjust the light to achieve a specific profile. The electronics required to power and control the light source may be placed in the housing subassembly, the lighting subassembly, or both.”

[0015] The above references cited herein relate to indirect lighting solutions that attempt to produce uniform light. However, some structures still need to be improved. Summary of the invention

[0016] The present invention provides an indirect light that is both comfortable and friendly to the human eye, and a symmetrical light source with different appearance characteristics, without strong light spots and direct light. The present invention can be operated according to different types of light sources of existing lamps such as LEDs and incandescent lamps.

[0017] Based on these requirements, our design concept is to distribute the light source symmetrically in the indirect lighting device. These symmetrically distributed lights radiate from the light source point to a larger area of ​​efficient reflective material surface, and then the light is reflected and diffusely reflected and emitted through the light outlet. In this way, the light changes from a point light source to a surface light source, which directly reduces the maximum light intensity per unit area. The symmetrically designed light source makes the light distribution, reflection and diffuse reflection more uniform. This reflection and diffuse reflection process makes the light from the concentrated point light of the light source point become indirect light after reflection and diffuse reflection. At the same time, the side wall structure is used in the design, which can completely prevent the direct light from escaping from the light outlet of the lighting device. The side wall structure also optimizes the light loss by providing a reflection process through the structure, realizing the indirect lighting of the entire lamp to achieve the expected effect of high light efficiency and low glare value.

[0018] The present disclosure achieves the above effect through an indirect lighting device, which mainly includes the following four components:

[0019] 1. The light source assembly is used to provide a light source, which is a complete light-emitting circuit. The light source assembly can be designed or installed to have a certain tilt angle to correspond to a reflective structure with different depths and inner curvatures. At the same time, the light source assembly can also be covered with an optical lens assembly to adjust its own light output angle and light output amplitude to achieve the best light effect. In the present disclosure, the light-emitting points of the light source assembly will be symmetrically distributed and designed in the lighting device. This symmetry is bidirectional symmetry, such as left and right or up and down. The light source assembly can also be omnidirectionally symmetrical, that is, the top, bottom, left and right are symmetrical to each other.

[0020] 2. The reflector structure assembly is a semi-enclosed reflective structure made of reflective plastic material, and its inner surface has light reflection and diffuse reflection characteristics. One side of the reflector structure assembly is a light outlet, and the other side has a certain depth according to the design of different types of lighting devices. The reflector structure assembly can be different types of domes or arches, and different heights or slopes can be spliced ​​under the dome or arch. Straight or beveled edges are used to increase the depth.

[0021] 3. Bottom structure components. The bottom structure components constitute the bottom installation structure and appearance. The bottom structure components install and fix the light source components at a certain angle, or install and fix the light source components together with the appearance components. According to the principle that the direct light of the light source component cannot be directly emitted from the light outlet, a corresponding light blocking structure is designed to achieve a completely indirect lighting effect.

[0022] 4. Appearance structural component protects and installs the reflector structural component. The appearance structural component is a part of the overall appearance structure of the indirect lighting device, which can be a shell.

[0023] The light source points of the light source assembly are designed to be symmetrically distributed at the bottom of the reflector structure. The angle between the installation angle line of the light source assembly and the horizontal line of the two outermost symmetrical points of the light outlet of the reflector structure assembly should be greater than 90° and less than or equal to 180°. In the same cross section, the center line of the light source point should be lower than the line connecting the center point of the light source (LED vertex) and the vertex of the reflector structure assembly. The angle between these two lines should be in the range of 0° to 45° (greater than or equal to 0° and less than or equal to 45°). The lowest luminous line of the highest luminous point of each LED chip cannot pass through the edge of the bottom structure assembly, so the original light of the light source cannot be emitted from the light outlet of the lighting device.

[0024] There are many different advantages to the present disclosure.

[0025] The present invention increases the luminous area, avoids the high-intensity light of the point light source, and makes the light softer. The present invention increases the effect of the surface light source, ultimately reducing glare and protecting our eyes.

[0026] The present invention improves the lighting effect and eliminates the need for a lampshade of a traditional lamp. A traditional lampshade is usually made of transparent plastic or glass, and the brightness loss is more than 10%-20% depending on the material.

[0027] The indirect lighting device with this structural design and modification can fully meet the energy standards of Energy Star (ES) for lighting devices. In some cases, the present invention can even achieve a luminous efficiency of more than 110LM / W (lumens / watt) under conditions of better reflective materials and structural design.

[0028] Reduce the shadows after the light is blocked and increase the light angle. Due to the effects of secondary reflection and surface light source, the light source point is larger, the light is more divergent, and the light output angle is increased. Compared with the traditional light source point, the illumination area is larger and larger. The present invention can reduce the shadows in the dark area formed after small objects block the light within the illumination range to a certain extent, and can also increase the brightness of the shadow surface in the dark area, increase the luminous angle, and obtain a larger luminous angle.

[0029] The present disclosure provides a different appearance for the lighting device. The present disclosure changes the shape and structure of the lamp to a certain extent, realizes the diversification of the appearance structure of the lighting lamp, and can design lamps with different aesthetic effects, bringing new choices for decoration.

[0030] In order to more clearly illustrate the relevant details and corresponding relationships, the following figures will be used to demonstrate the innovative technical solutions of the present disclosure. The following figures are not necessarily drawn completely to scale and may not represent the actual appearance of the product.

[0031] An indirect lighting device with a symmetrical light source includes a light source assembly. The light source assembly is used to emit light, and includes a light emitting diode (LED) connected to a circuit. The light source assembly has a certain tilt angle to correspond to a reflective structure with different depths and inner curvatures. The light emitting points of the light source assembly are distributed in a bidirectional symmetric manner, and the bidirectional symmetry refers to left-right symmetry or top-bottom symmetry. The reflector structure assembly has a semi-enclosed reflective structure made of a reflective material, and its inner surface has light reflection and diffuse reflection characteristics. One side of the inner surface is a light outlet, and the other side has a certain depth according to different types of lighting devices, so that the reflector structure forms a dome or an arch, and different heights or slopes are spliced ​​under the dome or the arch, and the straight edge or the beveled edge is used to increase the depth. The bottom structure assembly constitutes the bottom mounting structure and appearance. The bottom structure assembly mounts and fixes the light source assembly at a certain angle, and is designed with a corresponding light blocking structure according to the principle that the direct light of the light source assembly is not directly emitted from the light source assembly, so as to achieve a completely indirect lighting effect. The appearance structure assembly protects and mounts the reflector structure assembly, and the appearance use structure is part of the indirect lighting device with a symmetrical light source.

[0032] Optionally, the light source assembly is covered with an optical lens assembly, which can adjust its own light output angle and light output amplitude to achieve optimal light efficiency. An omnidirectional symmetry, in which the upper, lower, left and right directions are symmetrical to each other. The lowest light line of the highest light-emitting point of the LED chip does not directly irradiate outside the light outlet. The bottom structure assembly mounts and fixes the light source assembly and the appearance assembly together, and the bottom structure assembly also includes an extended edge extension tip to block the light from the lowest light line of the highest light-emitting point of the LED chip. The β angle is defined between the installation angle line of the light source assembly and the horizontal line of the light outlet, and is between or equal to 90° and 180°. The β angle is an inclination angle that can be adjusted according to the curvature and depth of the inner surface of the reflector structure assembly.

[0033] Two straight lines can be defined by an inclination angle, and the angle between them is the λ angle, which is between or equal to 0° and 45°. The central luminous line of the LED of the light source assembly is within the angle range that optimizes the light output effect, and all central luminous lines of all LED chips pass through the center line of the cross section of the reflector structure assembly to the other end of the center line. The λ angle is within the range of greater than or equal to 0° and less than or equal to 45°, and the symmetrical and uniform cross-illumination design enables the light within the luminous angle α of the LED point light source to reach the maximum effective luminous range and be reflected. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a schematic diagram of the overall appearance of an embodiment of an indirect lighting device.

[0035] Figure 2 yes Figure 1 An exploded view of the structure of the indirect lighting device shown.

[0036] Figure 3 yes Figure 1 Simplified selection diagram of indirect lighting fixtures shown.

[0037] Figure 4 yes Figure 3 A partial enlargement of a simplified alternative diagram of an indirect lighting device is shown.

[0038] Figure 5a and Figure 5b yes Figure 1 A schematic diagram of an LED light source for an indirect lighting device is shown. Figure 5b yes Figure 5a sectional view of .

[0039] Figure 6 5 is a schematic diagram of an indirect lighting device in which the LED light source is covered with an optical lens.

[0040] Figure 7 yes Figure 1 Simplified diagram of the component placement angles of an indirect lighting fixture shown.

[0041] Figure 8 yes Figure 1 A simplified schematic diagram of the output lines of an indirect lighting device is shown.

[0042] Fig. 9 yes Figure 1 An enlarged schematic diagram of the edge design of the indirect lighting device is shown.

[0043] Fig.10 yes Figure 1 The schematic diagram of light output of the indirect lighting device shown is after reflection / diffuse reflection.

[0044] Fig.11 The invention is an embodiment of a lighting device having a square symmetrical light source.

[0045] Fig.12 is an embodiment of a lighting device having parallel symmetrical light sources.

[0046] Description of Reference Numerals

[0047] 80α angle

[0048] 81 light source component channels

[0049] 82 β angle

[0050] 83 λ angle

[0051] 100 Indirect lighting fixtures

[0052] 110 light source components

[0053] 111LED Chip

[0054] 112 substrate

[0055] 113 Optical lens

[0056] 120 reflector structure components

[0057] 121 reflector structure component light outlet

[0058] 122 Inner surface of reflector structural component

[0059] 130 bottom structure components

[0060] 131 Bottom structure component light exit hole

[0061] 132 Bottom structural component edge

[0062] 133 Edge Extension Tip

[0063] 140 Appearance structure components

[0064] 150LED chip highest luminous point highest luminous line

[0065] The lowest luminous line of the lowest luminous point of 151LED chip

[0066] 152 center luminous line

[0067] 153LED chip highest luminous point lowest luminous line

[0068] 154 vertical line of the center of the reflector

[0069] 155 Vertex Connection Line

[0070] 156 Light source assembly installation angle line

[0071] 157 light outlet (hole) horizontal line

[0072] 158 Vertex DETAILED DESCRIPTION

[0073] The following embodiments are indirect lighting devices produced by the above innovative design, and will be described in detail with reference to the above schematic diagram.

[0074] like Figure 1 As shown, when viewed from the outside, the indirect lighting device 100 has a bottom structure component 130 and a bottom structure component light outlet hole 131 formed on the bottom structure component 130. The appearance structure component 140 constitutes an upper housing, preferably having decorative characteristics to satisfy consumers in distinguishing different products.

[0075] like Figure 2As shown, the exploded view of the present disclosure shows that the appearance structure component 140 is mounted on the reflector structure component 120. The reflector structure component 120 has a reflector structure component light outlet 121. The reflector structure component light outlet 121 is matched and mounted together with the bottom structure component light outlet hole 131. The light source component 110 has a circle of LED chips 111. The light source component 110 is mounted on the bottom structure component 130 and can be snapped together during the assembly process. The reflector structure component 120 is mounted on the bottom structure component 130. The appearance structure component 140 is mounted on the reflector structure component 120.

[0076] The reflector structure assembly 120 is a semi-enclosed structure formed by processing or bending a reflective material. One side of the reflector structure assembly 120 is a completely open light outlet 121. The light outlet 121 of the reflector structure assembly 120 is designed according to the structure of different embodiments, so the shape of its opening will be different according to the design of the lamp body structure. In addition, the light outlet 121 of the reflector structure assembly 120 is larger than the light outlet 131 of the bottom structure assembly, and the opening directions of the two are the same. The other side of the reflector structure assembly 120 is a closed structure with an inner surface 122 having a certain curvature. Depending on the specific embodiment of the lamp, the embodiment may have different types of top arch or dome shapes.

[0077] Reference Figure 2 The bottom structure component 130 is a structural member for installing and combining the light source component 110 and the reflector structure component 120. According to certain design requirements, the bottom structure component 130 combines and fixes the light source component 110 and the reflector structure component 120 at a certain installation angle to achieve the best overall light output effect. The appearance structure component 140 is a lamp housing, and its shape is similar to the reflector structure component 120. After the appearance structure component 140 is assembled and installed with other components, it constitutes an integral part of the appearance of the indirect lighting device 100. The appearance structure component 140 also protects and fixes the reflector structure component. The appearance structure component 140 can have various shapes according to the external design requirements of the lamp. The appearance structure component 140 can also be superimposed on other structures on the existing basis to place a power supply or other appearance modules with different functions. The appearance structure component 140 can be plastic or metal. According to different lighting application scenarios and different design requirements, the appearance structure component 140 has many possibilities.

[0078] like Figure 3 As shown, the overall cross-section of the indirect lighting device 100 shows the reflector structure assembly 120 mounted on the bottom structure assembly 130. The bottom structure assembly 130 can be represented as having a glittering decoration around the bottom structure assembly light outlet hole 131 thereof.

[0079] like Figure 4As shown, Figure 3 The close-up view of a portion of the cross section of FIG. 1 shows the reflector structure assembly 120 mounted on the bottom structure assembly 130. The bottom structure assembly 130 has an edge extension tip 133 extending from the bottom structure assembly edge 132. The light source assembly 110 is mounted in the light source assembly channel 81 formed between the bottom structure assembly edges 132.

[0080] like Figure 5a As shown, the light source assembly 110 is a light source composed of a group of LED chips 111 attached to a substrate 112 in the light source assembly channel 81. This embodiment takes a traditional LED light source as an example, but the present disclosure is not limited to using only LED light sources, and other types of light sources can also be used, such as CCFL, laser lamp, tungsten filament lamp, etc. LED 111 is a semiconductor light emitting diode. LED 111 is a cold light source. LED 111 has a high photoelectric conversion rate and a small size. The light emitting angle of LED 111 for general lighting is 120°.

[0081] The LED chip is surface mounted on a substrate 112. The substrate 112 can be a flexible board or a hard metal substrate. Typically, the substrate 112 is lined with copper wires and is a PCB board containing electronic circuits. The soldering points on the surface of the substrate 112 connect the LED chip 111 to form a light source assembly 110.

[0082] Reference Figure 5b The light emitting range of the LED 111 of the light source assembly 110 is represented by an angle α 80. The angle α 80 is defined between a highest light emitting line 150 of the highest light emitting point of the LED chip and a lowest light emitting line 151 of the lowest light emitting point of the LED chip.

[0083] The highest luminous line 150 of the highest luminous point of the LED chip is the highest luminous line of the highest luminous point of the LED chip 111. The lowest luminous line 151 of the lowest luminous point of the LED chip is the lowest luminous line of the lowest luminous point of the LED chip 111. The maximum angle α between them is called α angle 80, which is defined between the highest luminous line 150 of the highest luminous point of the LED chip and the lowest luminous line 151 of the lowest luminous point of the LED chip, and is 120°.

[0084] The central light line 152 is at a 90° angle to the horizontal plane of the LED chip 111, i.e., the light source assembly installation angle line 156, and is also the most central outward emission straight line of the LED chip light emitting area. The central light line 152 is the central light line emitted from the vertex of the LED chip. The light source assembly installation angle line 156 is perpendicular to the central light line 152. The light source assembly installation angle line 156 is on a substrate on which the LED is mounted, such as a printed circuit board.

[0085] According to different designs of the overall structure of different lighting devices, the shape of the light source assembly 110 is also different. Figure 2 The light source assembly 110 can be a closed loop connected end to end, or can be composed of multiple parallel strips formed by two or more substrates with LED chips attached. The shape of the light source assembly 110 is designed according to the shape of the light outlet 131 and the bottom shape of the reflector structure assembly 120 and the light effect requirements. In the present disclosure, the light source points of the light source assembly 110 have a certain symmetrical arrangement.

[0086] Reference Figure 6 , a set of optical lenses 113 can be additionally installed on the surface of the light source assembly 110 according to the light emission direction and light emission amplitude as needed. The optical lens 113 covers the surface of the LED 111 light source. The optical lens 113 can change the light emission direction of the LED 111 according to pre-designed parameters to achieve focusing and diffusing light, and can also change the size range of the light emission angle α of the light emitting light source, which helps to achieve the best effect of indirect light.

[0087] Reference comparison Figure 4 Figure 5 Figure 6 , by adding an optical lens 113, such as Figure 6 As marked in , the angle of the light emitted by the light source assembly 110 is changed. The use of the optical lens 113 to focus light and change the light output angle range can avoid the light angle caused by the angle of the light being too large or not suitable for incident on other non-reflective surfaces, such as the bottom structure assembly edge 132 of the bottom structure assembly 130. The optical lens 113 can controllably focus light and irradiate the light to the internal reflective surface of the reflector structure assembly 120 to achieve the best lighting effect. Similarly, in order to achieve the effect of indirect lighting, the light emitted from the light source assembly 110 covered with the optical lens 113 cannot be emitted from the light output hole 131 of the bottom structure assembly 130. Generally, if the optical lens 113 is used to change the light output direction, the overall light output efficiency will lose 10%-15% or even more due to the different materials of the lens 113.

[0088] Reference Figure 7 In order to maximize the light extraction efficiency, in the case of different reflector structure assemblies 120, the light source assembly installation angle line 156 of the light source assembly 110 without lens coverage forms a β angle 82 with the light outlet horizontal line 157 of the reflector structure assembly 120. The β angle 82 is defined between the light source assembly installation angle line and the horizontal line of the light outlet. The β angle 82 is an inclination angle β greater than 90° and less than or equal to 180° (90°<β≤180°). According to the curvature and depth of the inner surface of the reflector structure assembly 120, the size of the angle is adjusted to allow more and better light from the light source assembly 110 to be radiated onto the inner reflection surface of the reflector structure assembly 120.

[0089] Reference Figure 6 and Figure 7 , when the optical lens 113 covers the light source assembly 110, the maximum light output angle α, the highest light line 150 and the lowest light line 151 of the light source assembly 110 can be changed. Different angles and light output directions can be designed according to the requirements of light effect, so the placement position and placement angle β of the light source assembly 110 are relatively flexible. The light source assembly 110 covered with the optical lens 113 can be kept parallel to the horizontal line of the light outlet hole 131 of the bottom structure assembly 130, that is, the angle β=180° is used to place the light source assembly 110 or other large inclination angles. This design is usually conducive to structural installation or convenient for production assembly. Although the inclination angle β has greater flexibility when the optical lens 113 is added, ultimately, whether or not the optical lens 113 is added, the installation position of the light source assembly 110 will still fall within the range of angle β, that is, greater than 90° and less than or equal to 180°.

[0090] Reference Figure 8 , the reflector structure component 120 has a vertex 158, which is the highest center point of the structure, and the center vertical line 154 of the reflector cross section is the center semi-vertical tangent. In the indirect lighting device designed according to the symmetrical light source, the reflector structure component 120 has the vertex 158 of the internal arc-shaped reflective structure in the cross-sectional view. The light source points on the opposite sides are relatively symmetrical and produce symmetrical light output.

[0091] According to the requirements of different lamp embodiments, the reflector structure assembly 120 can add straight edges or inclined edges with different heights at the bottom, and the dome shape or semicircular upper structure of the inner arc surface can extend to a straight plane or an inclined plane. Such a design can provide a deeper height and more internal reflection surfaces for the reflective structure, thereby producing different lighting efficiency and appearance characteristics, and reducing the light emitting angle.

[0092] The central light emitting line 152 of the LED chip 111 of the light source assembly 110 may cover the lens or not. The vertex connecting line 155 is a connecting line from the LED chip to the vertex of the reflector structure assembly. When taking a cross section of the reflector structure assembly 120, the vertex connecting line 155 can be defined as starting from the center point of the LED chip 111 and extending to the vertex 158 located at the central vertex portion of the reflector structure assembly 120. At the same time, the two lines, the central light emitting line 152 and the vertex connecting line 155, are within an inclined angle λ, that is, the range of the λ angle 83 is 0° to 45° (0°≤λ≤45°). The central light emitting line 152 of the LED 111 of the light source assembly 110 is within this angle range to form an optimal light output effect. That is, all the luminous center lines, i.e., the central luminous lines 152 of all the LEDs 111, pass through the reflector center vertical line 154 of the cross section of the reflector structure assembly 120 and reach the other side of the reflector center vertical line 154, and the angle λ formed is within the range of greater than or equal to 0° and less than or equal to 45°, thereby achieving symmetrical and uniform cross lighting. This design enables the light within the luminous angle α of the LED chips 111 assembled into a point light source to reach the maximum effective luminous range when reflected.

[0093] When the shape of the inner surface of the reflector structure assembly 120 is different from that shown in the figure, for example, there are different straight edges or inclined edges, or different internal dome designs, the reflection of the inner surface of the different structures will produce multiple different reflections and diffuse reflections on the light, and the range of the inclination angle may also be different, which requires adjusting the value of the angle λ to obtain the best light effect. The general method for finding the value of the best light output angle λ is the elimination method. For example, first select the middle value of the best range of angle λ, the best range is greater than or equal to 0° and less than or equal to 45°, and the middle value is 22.5°, and then take the middle values ​​11.25° and 33.75° of each end to perform actual measurement of the three-point light efficiency value. Among the actual measured values ​​of the three points, 22.5° is usually the middle value, and then filter out the end with a lower light efficiency value. The next step is to select the middle value of the angles at both ends of the selected high light efficiency value area for a second screening. Usually, after 2-3 screenings, the value of the best light efficiency angle λ can be found. The value of the β angle will change with the value of the λ angle, and the value of the λ angle is given priority.

[0094] The reflector structure assembly 120 is mainly made of a plastic material with high-efficiency light reflection and diffuse reflection characteristics. This reflective material can be PET material, PC material, foamed polycarbonate, or expanded polystyrene foam and other types of plastic materials. At present, they are mainly used in the display industry and traditional direct lighting devices. For example, FURUKAWA's MCPET / MCPOLYCA material series can achieve high light efficiency of 99% light reflection efficiency and 96% light diffuse reflection efficiency. Such high light efficiency helps to solve the problem of innovative light loss in reflection, making indirect lighting devices possible.

[0095] Reflective plastic materials can usually be thermoformed or die-cut into different appearance shapes. In the structural design of lamps, the processed reflective material is our reflector structure component 120. The reflective material has a certain stretchability, and the reflective material is flexible, so it can be bent and curled. At present, there are many companies on the market whose reflective plastic materials can achieve high light efficiency and diffuse light output. Their products can replace each other. At present, they are widely used in different types of traditional direct lighting devices.

[0096] like Figure 8 As shown, in this cross section, the LED 111 lamp beads located at the lower left side of the bottom structure component 130 emit light toward the upper right of the inner surface of the reflector structure component 120, while the LED 111 lamp beads located at the lower right side of the bottom structure component 130 emit light toward the upper left of the inner surface of the reflector structure component 120. The LED 111 lamp beads on both sides of any cross section of the bottom structure component 130 illuminate the inner surface of the reflector structure component 120 at the same time and in opposite directions.

[0097] like Figure 8 As shown, this bidirectional symmetrical cross-illumination design will allow the light to be irradiated as a whole and diffusely reflected to the inner reflective surface of the entire reflector structure assembly 120. The high-efficiency material helps the light to be reflected multiple times on the surface of the reflector structure assembly 120. The light on the inner reflective surface of the reflector structure assembly 120 is evenly distributed without bright spots, which can avoid the situation where some areas on the inner reflective surface of the reflector structure assembly 120 are bright and some areas are dark.

[0098] The comprehensive omnidirectional symmetrical cross-lighting design can effectively avoid or reduce the phenomenon of yellow light edges or colored light edges appearing at the outermost edge of the light outlet hole 131 of the bottom structure component 130. If the outermost light of the light outlet hole 131 of the bottom structure component 130 has a yellow light edge or a colored light edge, then when designing the structure, adding a diffusion cover on the LED chip 111 can solve the phenomenon of the outermost yellow light edge or colored light edge. In the case where the light source reflects light symmetrically on different sides, the colored edge or yellow edge is relatively slight or non-existent. If the light source component 110 is only parallel symmetrical, for example, in the case where two parallel light sources are parallel up and down or left and right, and only the light sources on both sides are symmetrically lit, this problem is prone to occur.

[0099] Reference Fig. 9 , the bottom structure assembly 130 needs to be designed so that the direct light emitted by the light source assembly 110 cannot be seen through the light exit hole 131 of the bottom structure assembly 130 at any viewing angle. The lowest light line 153 of the highest light emitting point of the LED 111 needs to illuminate the edge extension tip 133 of the bottom structure assembly edge 132, or below it. The direct light cannot be seen. Similarly, after adding a cover lens 113 above the light source assembly 110 to change the light exit angle, any direct exit light cannot be directly emitted through the light exit hole 131 of the bottom structure assembly.

[0100] In order to achieve the uniformity and saturation of the light emitted in the embodiment of the present disclosure, when designing the correspondence between the light source assembly 110 and the reflector structure assembly 120, the light emitted by the LED chip 111 light source point of the light source assembly 110 must be symmetrically irradiated. The LEDs 111 of the light source assembly 110 need to be symmetrically distributed at the bottom of the reflector structure assembly 120. This symmetry is relative symmetry. The light source assembly 110 can be bilaterally symmetrical, that is, there are two parallel LED chips 111 symmetrically on both sides of the light outlet hole 131, and the two LED chips 111 emit light upward, and the two will intersect each other according to a predetermined angle parameter. This symmetry can also be a closed-loop light source point connected end to end in a circular, elliptical, square or rectangular shape. These LED chip 111 light source points will be located on opposite sides of the light outlet hole 131. The light source points are also symmetrical with each other.

[0101] Reference Fig.10 , the light source points of the symmetrical light source need to be evenly distributed at a certain interval. The distances between the light source points of the light source assembly are roughly the same, and the light source points are evenly distributed. According to different luminous flux requirements, the greater the luminous flux requirement, the greater the relative density of each light source point, and the lower the luminous flux, the wider the distance between each light source point.

[0102] like Fig.11As shown, the present disclosure can form a square symmetrical lamp. The lighting device with a square symmetrical light source has a square or rectangular light source assembly 110 composed of LED chips symmetrically distributed in all directions. The light outlet hole 131 of the bottom structure assembly is also square. The light outlet port 121 of the reflector structure assembly is also square. The bottom structure assembly 130 is used to install the light source assembly and block direct light. The reflector structure assembly 120 can be made of a highly light-resistant plastic material with high reflection efficiency. The lighting device also has an appearance structure assembly that can become an upper shell.

[0103] Reference Fig.12 The lighting device has a parallel and symmetrical light source. The light source assembly 110 is composed of double symmetrical parallel and evenly distributed LED chips. The LED lamp groups are installed on both sides. The bottom structure assembly 130 is used to install the light source assembly and block the direct light of the light source. The reflector structure assembly 120 with a slender reflector structure assembly light outlet 121 is made of a plastic material with high light reflection efficiency. The lighting device also has an appearance structure assembly 140.

Claims

1. An indirect lighting device with a symmetrical light source, comprising: A reflector structure assembly, wherein the reflector structure assembly has a semi-enclosed reflective structure made of a reflective material, an inner surface of which has light reflection and diffuse reflection properties, one side of the inner surface is a light outlet, and the other side of the inner surface has a certain depth according to different types of lighting devices, so that the reflector structure forms a dome or an arch, and straight edges or inclined edges with different heights are added under the dome or the arch, and the dome or the arch extends to the straight edge or the inclined edge, wherein the straight edge or the inclined edge is used to increase the depth of the reflective structure and increase the internal reflection surface; A light source assembly, the light source assembly is used for emitting light, and includes a light emitting diode (LED) connected to a circuit, the light source assembly has a certain installation angle to correspond to the reflective structures with different depths and inner curvatures, the light emitting points of the light source assembly are located on opposite sides of the light outlet of the reflector structure assembly and are symmetrical to each other, and the installation angle is the angle between the installation angle line of the light source assembly and the horizontal line of the light outlet of the reflector structure assembly; A bottom structure component, which constitutes the installation structure and appearance of the bottom, and is used to install and fix the light source component at a certain angle. Based on the principle that the direct light of the light source component does not directly overflow from the bottom structure component, a corresponding light blocking structure is designed to achieve a completely indirect lighting effect; and An appearance structure component, wherein the appearance structure component protects and installs the reflector structure component, wherein the appearance structure is a part of the indirect lighting device with a symmetrical light source, the central luminous line of the LED of the light source component is lower than the line between the center point of the LED light source of the light source component and the central vertex of the cross section of the reflector structure component, the inclination angle within the two straight lines is an angle λ greater than 0° and less than or equal to 45°, the central luminous line of the LED of the light source component is within the angle range of optimizing the light output effect, all central luminous lines of all LED chips pass through the center line of the cross section of the reflector structure component to the other end of the center line, and the angle λ is within the range of greater than 0° and less than or equal to 45°, thereby achieving symmetrical and uniform cross lighting, so that the light within the luminous angle α of the LED point light source reaches the maximum effective luminous range and is reflected, The λ angle is obtained by the elimination method, and the middle value of the optimal range of the angle λ is selected. The optimal range is greater than 0° and less than or equal to 45°. Then the middle value of each end is taken, and the actual measurement of the three-point luminous efficiency value is performed. The end with a lower luminous efficiency value is filtered out, and the middle value of the angles at both ends of the selected high luminous efficiency value area is selected. Then, 2 or 3 screenings are performed to obtain the value of the optimal luminous efficiency angle λ.

2. The indirect lighting device with a symmetrical light source according to claim 1, wherein: The shape of the inner surface of the reflector structure assembly is variable.

3. The indirect lighting device with a symmetrical light source according to claim 1, wherein: The light source assembly is covered with an optical lens assembly to adjust its own light emitting angle α and light output amplitude to achieve the best light effect.

4. The indirect lighting device with a symmetrical light source according to claim 1, wherein: Also includes: Omnidirectional symmetry, where the up, down, left, and right directions are symmetrical to each other.

5. The indirect lighting device with a symmetrical light source according to claim 1, wherein: The bottom structure assembly installs and fixes the light source assembly and the appearance structure assembly together.

6. The indirect lighting device with a symmetrical light source according to claim 1, wherein: The installation angle line of the light source assembly is formed without lens coverage, and forms an installation angle greater than 90° and less than or equal to 180° with the horizontal line of the light outlet of the reflector structure assembly, wherein the installation angle is adjusted according to the curvature and depth of the inner surface of the reflector structure assembly.

7. The indirect lighting device with a symmetrical light source according to claim 6, wherein: The angle between the installation angle line of the light source assembly and the horizontal line of the light outlet of the reflector structure assembly is adjusted to increase the light radiation on the inner surface of the reflector structure assembly, wherein the reflective material is a plastic material.

8. The indirect lighting device with a symmetrical light source according to claim 1, wherein: The optical lens covers the light source assembly, the luminous angle α, the highest luminous line and the lowest luminous line of the light source assembly are adjusted according to the requirements of light effect, different angles and light output direction, and the placement position of the light source assembly and the installation angle are flexible and variable.

9. The indirect lighting device with a symmetrical light source according to claim 8, wherein: The light source assembly is covered with an optical lens, and the installation angle line of the light source assembly is kept parallel to the horizontal line of the light outlet of the reflector structure assembly, wherein the installation angle is equal to 180°.

10. The indirect lighting device with a symmetrical light source according to claim 8, wherein: The installation angle is greater than 90° and less than or equal to 180°.

11. The indirect lighting device with a symmetrical light source according to claim 1, wherein: Also includes: The light source assembly is covered with a diffusion cover, and the diffusion cover is used to reduce the yellow light edge or the colored light edge on one side of the light outlet.

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