Lighting device

Abstract

The utility model relates to a lighting device which comprises a light-emitting part, the light-emitting part is provided with a light distribution lens, and the light distribution lens is used for enabling the light-emitting part to output a pre-configured light distribution curve to an indoor ceiling. Wherein the pre-configured light distribution curve is used for enabling the brightness value of a target area of the ceiling to be not higher than a preset photopic vision brightness threshold value and enabling the ceiling to form a preset brightness gradient from bright to dark from the central position to the edge position; the proportion of the target area to the total ceiling area is not less than a preset ratio threshold. According to the lighting device, a large-area secondary reflection light source can be formed by means of the ceiling surface, high-uniformity average illumination is formed on the ground while the maximum brightness of the light source is controlled, a user can effectively perceive space and obstacle contours when getting up to move in a room during sleep at night, safety is improved, and meanwhile, the illumination effect of the user can be improved at low illumination brightness. And scotopic vision or mesopic vision is adopted for viewing objects, so that re-sleeping after transient activities is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of lighting, in particular to a lighting device used for indoor environment contour lighting at night. Background Art

[0002] At present, various night lights widely used, whether desktop, plugged into sockets, skirting groove lights, ordinary lamps such as ceiling lights, etc., are all equipped with low-luminous flux LED light sources or reduce the luminous flux output of ordinary lamps to achieve night light function. Due to the limited light output area of ​​these lamps, under a certain luminous flux output, the brightness of the light output surface of the lamp is usually greater than 30cd / m 2 . At the same time, the illumination uniformity generated by these lamps is low, which inevitably requires more luminous flux and higher light-emitting surface brightness to meet the user's effective identification of direction, obstacles and environment. For ceiling lamps, which have a larger light-emitting area than night lights, the illumination uniformity generated during lighting is also limited, and is greatly affected by the environment such as the reflectivity of the wall or whether the wall is blocked. To meet the user's effective identification of direction, obstacles and environment at night, a higher surface brightness of the lamp is often required. These night lighting conditions can easily cause the user's vision to enter the bright vision area when they get up briefly at night, affecting their ability to fall asleep again. Reducing the brightness reduces the effectiveness of the user's identification of direction, obstacles and environment, affecting the safety of nighttime activities.

[0003] Therefore, in the traditional night light lighting device, the applicant discovered during the implementation process that there is a problem of low applicability. Utility Model Content

[0004] Based on this, it is necessary to provide a lighting device that can enable users to effectively perceive the outline of space and obstacles, identify the direction of activity, obstacles and environment, improve the safety of night activities when they get up from sleep for a short time and move indoors, and use dark vision or intermediate vision under lower lighting brightness, which is conducive to falling asleep again after a short activity and improving the applicability of lighting. The purpose is to use the entire ceiling to form a medium light source with a large area, low brightness and a certain gradient arrangement, so that the distribution of light in the indoor space can meet the needs of users to effectively identify directions, obstacles and environments, ensure and improve the safety of night activities, and facilitate users to use and maintain dark vision and intermediate vision working states when they get up from sleep for a short time and move around at night, making it easier to fall asleep again after the activity is completed.

[0005] A lighting device, comprising:

[0006] A light emitting unit, wherein the light emitting unit is provided with a light distribution lens;

[0007] The light distribution lens is used to output the pre-configured light distribution curve from the light emitting part to the ceiling in the room;

[0008] Among them, the pre-configured light distribution curve is used to make the brightness value of the target area on the ceiling not higher than the preset photopic brightness threshold, and to form a preset brightness gradient from bright to dark from the central position to the edge position of the ceiling; the proportion of the target area in the total area of the ceiling is not less than the preset ratio threshold.

[0009] In one embodiment, the lighting device further includes a lamp panel suspended on the ceiling, the light emitting part is arranged on the upper surface of the lamp panel, and the light emitting part includes a first annular light source array and a second annular light source array; among them,

[0010] The first annular light source array takes the center of the lamp panel as the center of the circle, and the first annular light source array is used to output a first light distribution curve;

[0011] The second annular light source array takes the center of the lamp panel as the center of the circle, the radius of the second annular light source array is greater than the radius of the first annular light source array, and the second annular light source array is used to output a second light distribution curve;

[0012] The first light distribution curve and the second light distribution curve together form the pre-configured light distribution curve.

[0013] In one embodiment, both the first annular light source array and the second annular light source array include at least two circles of annular sub-light source arrays, and each circle of annular sub-light source arrays includes a plurality of sub-light sources arranged at intervals;

[0014] Among the at least two circles of annular sub-light source arrays, the radial distance between two adjacent circles of annular sub-light source arrays is 4-12 mm;

[0015] Among the at least two circles of annular sub-light source arrays, the axial distance between the outermost circle of annular sub-light source arrays and the innermost circle of annular sub-light source arrays is 0-80 mm.

[0016] In one embodiment, the color temperatures of every two adjacent sub-light sources in the annular sub-light source array are different.

[0017] In one embodiment, the distance between the first annular light source array and the second annular light source array is 20-32 mm.

[0018] In one embodiment, the first light distribution curve includes a spherical light distribution curve with a light intensity of 10% of the total light intensity of the light source and a beam angle of 105°-125°;

[0019] The second light distribution curve includes a batwing light distribution curve with a luminous intensity of 10% of the total luminous intensity of the light source and a beam angle of 155° - 175°.

[0020] In one embodiment, the first annular light source array includes a first LED light source and a diffusing lens that generates a light intensity of 10% of the total luminous intensity of the first LED light source and has a beam angle of 120°.

[0021] The second annular light source array includes a second LED light source and a backlight lens that generates a light intensity of 10% of the total luminous intensity of the second LED light source and has a beam angle of 165°.

[0022] In one embodiment, the diameter of the lamp panel is 36 - 166 cm.

[0023] In one embodiment, the lighting device further includes a power source for supplying power to the light emitting part and a linking mechanism for connecting to the ceiling surface.

[0024] In one embodiment, the linking mechanism includes a lamp post or steel wire disposed at the center of the lamp panel of the lighting device for connecting to the ceiling surface.

[0025] The above lighting device includes a light emitting part provided with a light distribution lens. The light emitting part outputs a preconfigured light distribution curve to the ceiling in the room through the light distribution lens. The preconfigured light distribution curve is used to make the brightness value of the target area on the ceiling not higher than a preset photopic brightness threshold, and to form a preset brightness gradient from bright to dark from the central position to the edge position of the ceiling. The proportion of the target area in the total area of the ceiling is not less than a preset ratio threshold, so that the light emitted by the lighting device can form a large - area, low - brightness and medium - light - source with a certain gradient arrangement on the entire ceiling surface in the room, enabling the user of the lighting device to have a clear perception and discrimination of including directions, obstacles and the surrounding environment, but not being fully awakened by a high lighting brightness. Compared with traditional night lights and low - brightness ceiling lights, the above lighting device can greatly reduce the maximum brightness of the indoor space, and the light spatial distribution is more conducive to the user's comprehensive and effective perception of the outlines of objects in the space. While improving the safety of getting up and moving briefly during night sleep, it avoids the user entering the photopic vision operation state, is conducive to falling asleep again, and greatly improves the adaptability of the lighting device. Brief Description of the Drawings

[0026] To more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0027] Figure 1A It is a schematic flowchart of a control method for a lighting device in an embodiment;

[0028] Figure 1B It is a schematic structural diagram of a lighting device in an embodiment;

[0029] Figure 2 It is a schematic structural diagram of a light source of a lighting device in an embodiment;

[0030] Figure 3 It is a schematic diagram of a light distribution curve in an embodiment;

[0031] Figure 4 It is a schematic diagram of a light distribution curve in another embodiment;

[0032] Figure 5 It is a brightness value distribution diagram of the ceiling surface in Embodiment 1;

[0033] Figure 6 It is a brightness value distribution diagram of the wall surface in Embodiment 1;

[0034] Figure 7 It is a brightness value distribution diagram of the ceiling surface in Embodiment 2;

[0035] Figure 8 It is a brightness value distribution diagram of the wall surface in Embodiment 2;

[0036] Figure 9 It is a brightness value distribution diagram of the ceiling surface in Embodiment 3;

[0037] Figure 10 It is a brightness value distribution diagram of the wall surface in Embodiment 3;

[0038] Figure 11 It is a brightness value distribution diagram of the ceiling surface in Comparative Example 1;

[0039] Figure 12 It is a brightness value distribution diagram of the wall surface in Comparative Example 1;

[0040] Figure 13 It is a brightness value distribution diagram of the ceiling surface in Comparative Example 2;

[0041] Figure 14 It is a brightness value distribution diagram of the wall surface in Comparative Example 2;

[0042] Figure 15 It is the brightness value distribution diagram of the wall surface in Comparative Example 3;

[0043] Figure 16 It is the brightness grayscale schematic diagram of the wall surface in Example 1;

[0044] Figure 17 It is the brightness grayscale schematic diagram of the wall surface in Comparative Example 1;

[0045] Among them, 101 is a circular lamp panel, 102 is a light source, 102a is a first annular light source array, 102b is a second annular light source array, 103 is a power supply, and 104 is a linking mechanism. Detailed implementation manners

[0046] For the convenience of understanding this application, the following will describe this application more comprehensively with reference to the relevant attached drawings. Embodiments of this application are shown in the attached drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this application more thorough and comprehensive.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the description of this application in this specification are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0048] It can be understood that the terms "first", "second", etc. used in this application can be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.

[0049] Spatial relationship terms such as "under", "below", "lower", "beneath", "above", "upper", etc. can be used herein to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that in addition to the orientation shown in the figure, spatial relationship terms also include different orientations of the device during use and operation. For example, if the device in the attached drawing is flipped, the element or feature described as "under other elements" or "beneath it" or "under it" will be oriented "above" other elements or features. Therefore, the exemplary terms "under" and "below" can include both the upper and lower orientations. In addition, the device can also include other orientations (such as rotating 90 degrees or other orientations), and the spatial description terms used herein are accordingly interpreted.

[0050] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediate element. In addition, in the following embodiments, "connection", if there is transmission of electrical signals or data between the connected objects, should be understood as "electrical connection", "communication connection", etc.

[0051] As used herein, the singular forms "a", "an" and "the" may also include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprises / include" or "has" etc. specify the presence of the stated features, wholes, steps, operations, components, parts or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0052] As described in the background art, the lighting devices in the traditional technology have the problem of low applicability. Through the research of the inventor, it is found that the reason for this problem is that there are various photosensitive cells on the human retina, among which the rod cells and cone cells are responsible for scotopic vision, photopic vision and mesopic vision respectively or jointly. Cone cells are responsible for fine and color vision, and rod cells are responsible for peripheral contours. Therefore, when a person needs to get up briefly and move indoors during night sleep, usually only the rod cells are needed to distinguish directional, obstacle and environmental contour information, and the fovea where cone cells are concentrated is not needed. In this case, the inventor finds that as long as a weak light is provided, it can support the normal operation of rod cells, enabling people to effectively distinguish directional, obstacle and environmental contour information and complete the target task of getting up briefly. At this time, the human vision is in the scotopic or mesopic vision state, which is beneficial to falling asleep again after the task is completed.

[0053] For the above reasons, as Figure 1A shown, the present application provides a control method for a lighting device. The lighting device includes a light-emitting part, and a light distribution lens is arranged on the light-emitting part. The method at least includes the following steps:

[0054] Step 100, controlling the light-emitting part to output a pre-configured light distribution curve to the ceiling in the room through the light distribution lens.

[0055] In practical applications, the pre-configured light distribution curve can adopt a spherical light distribution curve with a beam angle of 160°.

[0056] In specific implementation, the lighting device can receive a lighting-on instruction implemented on the lighting device. For example, the user turns on the switch of the lighting device or the lighting device receives a control instruction to turn on the lighting, etc.; the lighting device can respond to the lighting-on instruction implemented on the lighting device, and control the light-emitting part to output a pre-configured light distribution curve to the ceiling in the room through the light distribution lens.

[0057] Among them, the pre-configured light distribution curve can make the brightness value of the target area on the ceiling not higher than the preset photopic brightness threshold, and form a preset brightness gradient from bright to dark from the central position to the edge position of the ceiling; the proportion of the target area in the total area of the ceiling is not less than the preset ratio threshold.

[0058] Among them, the photopic brightness threshold can be the light brightness that generates photopic vision for the visual organs.

[0059] In practical applications, the photopic brightness threshold can be set to 3 cd / m 2 .

[0060] In an exemplary embodiment, the pre-configured light distribution curve can make the brightness value of the target area between 0.01 - 3 cd / m 2 .

[0061] Among them, the proportion of the target area in the total area of the ceiling is not less than the preset ratio threshold.

[0062] In practical applications, the target area is a circular area formed with the central position of the ceiling as the center, and the ratio of this target area in the total area of the ceiling is more than 60%.

[0063] In an exemplary embodiment, the ratio of the target area in the total area of the ceiling is 60 - 80%.

[0064] Among them, the pre-configured light distribution curve can make the ceiling form a preset brightness gradient from bright to dark from the central position to the edge position.

[0065] In practical applications, the pre-configured light distribution curve can make the brightness value of the edge position of the ceiling not lower than 0.001 cd / m 2 , and make the brightness value of the edge position of the ceiling be 5% - 15% of the brightness value of the central position of the ceiling.

[0066] Optionally, the lighting device can control the light-emitting part to output the pre-configured light distribution curve to the ceiling in the room through the light distribution lens. This pre-configured light distribution curve can make the brightness value of more than 60% of the ceiling area between 0.01 - 3 cd / m 2 , while meeting that the brightness value of the edge position of the ceiling is 5% - 15% of the brightness value of the central position of the ceiling, and the brightness value of the edge position of the ceiling surface is not lower than 0.001 cd / m 2 .

[0067] The control method of the above-mentioned lighting device, the lighting device includes a light-emitting part, the light-emitting part is provided with a light distribution lens, and this method controls the light-emitting part to output a pre-configured light distribution curve to the ceiling in the room through the light distribution lens; the pre-configured light distribution curve is used to make the brightness value of the target area of the ceiling not higher than a preset photopic brightness threshold, and to form a preset brightness gradient from bright to dark from the central position to the edge position of the ceiling; the ratio of the target area to the total area of the ceiling is greater than or equal to a preset ratio threshold, so that the light emitted by this lighting device can form a large-area, low-brightness and medium light source with a certain gradient arrangement on the entire ceiling surface in the room, enabling the user of this lighting device to have a clear perception and discrimination of including directions, obstacles and the surrounding environment, but not being fully awakened by a high lighting brightness. Compared with traditional night lights and low-brightness ceiling lights, the above-mentioned lighting device can greatly reduce the maximum brightness of the indoor space, and the light space distribution is more conducive to the user to comprehensively and effectively perceive the outlines of the objects in the space. While improving the safety of getting up and moving briefly during night sleep, it avoids the user from entering the photopic vision working state, is conducive to falling asleep again, and greatly improves the adaptability of the lighting device.

[0068] In an exemplary embodiment, the reflectivity of the ceiling is 60%-90%.

[0069] In an exemplary embodiment, the method further includes: through the pre-configured light distribution curve, making the maximum brightness value of the ceiling be 0.1-3 cd / m 2 .

[0070] In an exemplary embodiment, the distance between the upper surface of the lighting device and the ceiling surface is 25-133 cm.

[0071] In an exemplary embodiment, the method further includes: through the pre-configured light distribution curve, making the maximum illuminance generated by the reflected light of the ceiling on the ground not greater than 0.90 lx, and the illuminance uniformity greater than 0.80.

[0072] In an exemplary embodiment, the method further includes: controlling the minimum luminous flux output of the light-emitting part to be 1-4 lm.

[0073] In an exemplary embodiment, controlling the minimum luminous flux output of the light-emitting part to be 1-4 lm includes: controlling the output luminous flux of the light-emitting part and the space area to conform to the following formula:

[0074] ;

[0075] where is the output luminous flux, and S is the space area.

[0076] In this embodiment, by controlling the output luminous flux of the light-emitting part and the lighting space area to satisfy , it can ensure the formation of ambient light with a large coverage range, effectively reduce the spatial surface brightness contrast, promote the perception of the space contour by people, keep the human eye in the mesopic vision state, and not affect falling asleep again, thereby improving the applicability of the lighting device in the night environment.

[0077] In an exemplary embodiment, the method further includes: controlling the output color temperature of the light-emitting part to be light with a color temperature of 3000 - 5500K.

[0078] For the same reason as above, the present application also provides a lighting device that can improve the applicability of night lighting.

[0079] In an exemplary embodiment, a lighting device is provided, and the device includes: a light-emitting part, and a light distribution lens is arranged on the light-emitting part; the light distribution lens is used to make the light-emitting part output a pre-configured light distribution curve to the ceiling in the room.

[0080] Among them, the pre-configured light distribution curve is used to make the brightness value of the target area on the ceiling not higher than the preset photopic brightness threshold, and make the ceiling form a preset brightness gradient from bright to dark from the central position to the edge position; the proportion of the target area in the total area of the ceiling is not less than the preset ratio threshold.

[0081] It should be noted that the specific limitation of the pre-configured light distribution curve can refer to the limitation of the control method of a lighting device in the above text, and will not be elaborated here.

[0082] In an exemplary embodiment, as Figure 1B shown, a lighting device is provided, and the device includes: the lighting device further includes a lamp panel 101 suspended on the ceiling, the light-emitting part 102 is arranged on the upper surface of the lamp panel, and the light-emitting part includes a first annular light source array 102a and a second annular light source array 102b.

[0083] Specifically, the lamp panel 101 can be suspended at the middle position or the geometric center of the ceiling and other positions.

[0084] Among them, the lamp panel 101 can be a lamp panel for loading light sources. The lamp panel 101 can be recessed. For example, when the lamp panel 101 is in use, the surface close to the ceiling shows a recessed setting to better arrange the light-emitting part 102. In practical applications, the lamp panel 101 can adopt a circular lamp panel.

[0085] The first annular light source array 102a takes the center of the lamp panel 101 as the center of the circle, and the first annular light source array 102a is used to output a first light distribution curve.

[0086] Among them, the first annular light source array 102a can be an array unit formed by multiple light sources for outputting light. The first annular light source array 102a can be set at a first annular position, and the first annular position can be an annular position centered on the center of the lamp panel 101 and formed with the radius of the first annular light source array 102a. The first light distribution curve can be a narrow light distribution curve. The narrow light distribution curve can be the distribution curve of the light beam formed after the light emitted by the light source passes through a lens or a reflection device. The narrow light distribution curve usually can represent the focusing degree of the light beam, that is, how narrow the radiation range of the light beam is. The characteristic of the narrow light distribution curve is that the radiation range of the light beam is small, and the light can be concentrated in a small area, which is suitable for scenarios that require high brightness and long-distance illumination, such as stage lighting, laser irradiation, etc.

[0087] The second annular light source array 102b, centered on the center of the lamp panel 101, has a radius of the second annular light source array 102b greater than the radius of the first annular light source array 102a, and the second annular light source array 102b is used to output a second light distribution curve.

[0088] Among them, the second annular light source array 102b can be an array unit formed by multiple light sources for outputting light. The first annular light source array 102a and the second annular light source array 102b can be used to distinguish the different lights output by the two. The second annular light source array 102b can be set at a second annular position, and the second annular position can be an annular position centered on the center of the circular lamp panel 101 and formed with the radius of the second annular light source array 102b. The second light distribution curve can be a wide light distribution curve. The wide light distribution curve can refer to the distribution curve of the light beam formed after the light emitted by the light source passes through a lens or a reflection device. The wide light distribution curve usually represents the diffusion degree of the light beam, that is, how wide the radiation range of the light beam is. The characteristic of the wide light distribution curve is that the radiation range of the light beam is large, and the light can be evenly dispersed in a relatively wide area, which is suitable for scenarios that require wide irradiation and soft lighting, such as outdoor landscape lighting, building lighting, etc.

[0089] Among them, both the first annular light source array 102a and the second annular light source array 102b are set on the side of the lamp panel 101 close to the ceiling, and the beam angle of the second light distribution curve is greater than the beam angle of the first light distribution curve, so that the pre-configured light distribution curve as described above is formed under the combined illumination of the first annular light source array 102a and the second annular light source array 102b.

[0090] Exemplarily, the lamp panel 101 can be used for hanging on the ceiling. For example, it can be used for hanging at a specified position such as the geometric center of the ceiling. The first annular light source array 102a can be arranged on the side of the lamp panel 101 close to the ceiling in a circular form with the center of the lamp panel 101 as the center of the circle and a preset radius of the first annular light source array 102a. The second annular light source array 102b can be arranged on the side of the lamp panel 101 close to the ceiling in a circular form with the center of the lamp panel 101 as the center of the circle and a preset radius of the second annular light source array 102b, and the preset radius of the second annular light source array 102b can be greater than the preset radius of the first annular light source array 102a.

[0091] In the specific implementation process, the first annular light source array 102a is used to output the first light distribution curve, and the second annular light source array 102b is used to output the second light distribution curve. At the same time, the beam angle of the second light distribution curve is greater than the beam angle of the first light distribution curve, so that the luminous flux under the combined illumination of the first annular light source array 102a and the second annular light source array 102b and the illuminated space area satisfy a preset proportional relationship, so as to be able to control the brightness value at the edge position of the ceiling surface to be a preset proportion of the brightness value at the central position. For example, it can be controlled that the luminous flux under the combined illumination of the first annular light source array 102a and the second annular light source array 102b and the illuminated space area satisfy the following preset proportional relationship: , so as to be able to control the brightness value at the edge position of the ceiling surface to be 5%-15% of the brightness value at the central position.

[0092] In this embodiment, the lighting device includes: a lamp panel for hanging at a specified position on the ceiling; a first annular light source array with the center of the lamp panel as the center of the circle, and the first annular light source array is used to output the first light distribution curve; a second annular light source array with the center of the lamp panel as the center of the circle, and the radius of the second annular light source array is greater than the radius of the first annular light source array, and the second annular light source array is used to output the second light distribution curve; wherein, both the first annular light source array and the second annular light source array are arranged on the side of the lamp panel close to the ceiling, and the beam angle of the second light distribution curve is greater than the beam angle of the first light distribution curve, so that the luminous flux under the combined illumination of the first annular light source array and the second annular light source array and the illuminated space area satisfy a preset proportional relationship. Compared with the traditional technology, through the above structural arrangement in this embodiment, it is possible to form ambient light with a large coverage range through the first annular light source array and the second annular light source array, and effectively reduce the surface brightness contrast of the space, promote the perception of the space contour by people, keep the human eye in the mesopic vision state, and do not affect falling asleep again, thereby improving the applicability of the lighting device in the night environment.

[0093] In an exemplary embodiment, such asFigure 1B As shown, the lighting device further includes: a power source 103 for supplying power to the first annular light source array and the second annular light source array, and a linking mechanism 104 for connecting to the ceiling surface; the power source is a dry battery or a rechargeable battery; the linking mechanism 104 includes a lamp post or a steel wire disposed at the center of the lamp panel for connecting to the ceiling surface; the length of the linking mechanism is 25 - 133 cm, further preferably 30 - 90 cm. The distance from the first annular light source array to the center of the lamp panel is 100 - 150 mm. The spacing between the first annular light source array and the second annular light source array is 20 - 32 mm.

[0094] In an exemplary embodiment, both the first annular light source array and the second annular light source array include at least two circles of annular sub - light source arrays, and each circle of annular sub - light source arrays includes a plurality of spaced - apart sub - light sources;

[0095] Among the at least two circles of annular sub - light source arrays, the radial distance between two adjacent circles of annular sub - light source arrays is 4 - 12 mm;

[0096] Among the at least two circles of annular sub - light source arrays, the axial spacing between the outermost circle of annular sub - light source arrays and the innermost circle of annular sub - light source arrays is 0 - 80 mm.

[0097] Wherein, the annular sub - light source array can be a sub - unit of the annular light source array. For example, two circles of annular sub - light source arrays can form the first annular light source array. The sub - light source can be a lamp bead for emitting light. The radial distance can be the distance in the radial direction of the lamp panel radius.

[0098] Exemplarily, the first annular light source array can include at least two circles of annular sub - light source arrays, each circle of annular sub - light source arrays includes a plurality of spaced - apart sub - light sources, and the radial distance between two adjacent circles of annular sub - light source arrays is 4 - 12 mm; the axial spacing between the outermost circle of annular sub - light source arrays and the innermost circle of annular sub - light source arrays is 0 - 80 mm.

[0099] The second annular light source array can include at least two circles of annular sub - light source arrays, each circle of annular sub - light source arrays includes a plurality of spaced - apart sub - light sources, and the radial distance between two adjacent circles of annular sub - light source arrays is 4 - 12 mm; the axial spacing between the outermost circle of annular sub - light source arrays and the innermost circle of annular sub - light source arrays is 0 - 80 mm.

[0100] Optionally, the axial spacing between the outermost circle of annular sub - light source arrays and the innermost circle of annular sub - light source arrays is 0 - 12 mm.

[0101] In some embodiments, such as Figure 2As shown in the figure, the first annular light source array 102a includes two rings of annular sub-light source arrays. The inner dotted-line circle is the first annular light source array 102a, and the second annular light source array 102b includes two rings of annular sub-light source arrays. The outer dotted-line circle is the second annular light source array 102b.

[0102] In this embodiment, through the above structural arrangement, the brightness value of 60% - 80% of the ceiling surface can be controlled to be not lower than 5% - 15% of the maximum brightness value, which is beneficial for users to quickly perceive the outline of spatial objects and effectively avoids the human eye from entering the photopic vision state and making it difficult to fall asleep.

[0103] In an exemplary embodiment, the color temperatures of every two adjacent sub-light sources in the annular sub-light source array are different.

[0104] Exemplarily, the lamp beads in the annular sub-light source array are arranged alternately with two different color temperatures. Among them, the first type of lamp beads has a color temperature of 2700 - 3300K, for example, it can be 3000K; the second type of lamp beads has a color temperature of 5000 - 5500K, for example, it can be 5000K. Further, the lamp beads can be LED light-emitting lamp beads.

[0105] In this embodiment, through the above structural arrangement, the outline of spatial objects can be effectively and quickly perceived, and the human eye is effectively prevented from entering the photopic vision state and making it difficult to fall asleep, improving the applicability of the lighting device at night.

[0106] In an exemplary embodiment, the distance between the first annular light source array and the second annular light source array is 20 - 32mm.

[0107] Exemplarily, both the first annular light source array and the second annular light source array can include two rings of annular sub-light source arrays, and the distance between the outermost ring of the annular sub-light source array of the first annular light source array and the innermost ring of the annular sub-light source array of the second annular light source array is 20 - 32mm. In this way, an ambient light with a large coverage range can be formed, improving the applicability of the lighting device.

[0108] In an exemplary embodiment, the first light distribution curve includes a spherical light distribution curve with a light intensity of 10% of the total light intensity of the light source and a beam angle of 105° - 125°;

[0109] The second light distribution curve includes a batwing light distribution curve with a light intensity of 10% of the total light intensity of the light source and a beam angle of 155° - 175°.

[0110] Exemplarily, the first light distribution curve includes a spherical light distribution curve with a luminous intensity of 10% of the total luminous intensity of the light source and a beam angle of 105° - 125°. In this way, the first annular light source array can output a narrow light distribution curve. The second light distribution curve includes a batwing light distribution curve with a luminous intensity of 10% of the total luminous intensity of the light source and a beam angle of 155° - 175°. In this way, the second annular light source array can output a wide light distribution curve. Through the above settings, when the lighting device irradiates the ceiling surface of the indoor space, the brightness value at the edge position of the ceiling surface can be 5% - 15% of the brightness value at the central position, and the brightness value of more than 60% of the area of the ceiling surface is controlled to be within 0.01 - 3 cd / m 2 , while controlling the brightness value at the edge position of the ceiling surface to be not less than 0.001 cd / m 2 . The brightness value at the edge position of the ceiling surface is not less than 0.001 cd / m2. The maximum illuminance on the ground is not greater than 0.90 lx, and the illuminance uniformity is greater than 0.80. It can form ambient light with a large coverage range, and can further reduce the brightness contrast of the space wall surface by 20% - 50%, which is more conducive to users quickly perceiving the outline of space objects, and effectively avoids the human eye entering the photopic vision state and making it difficult to fall asleep.

[0111] Furthermore, when the light flux output of the lighting device is set to be greater than the minimum light flux output and reaches more than 2000 lm, and further is 10000 lm, it can provide normal indoor lighting with good visual acuity and color rendering ability, enabling users to work visually in the photopic vision.

[0112] In an exemplary embodiment, the first annular light source array includes a first LED light source and a diffusing lens that generates a luminous intensity of 10% of the total luminous intensity of the first LED light source and a beam angle of 120°;

[0113] The second annular light source array includes a second LED light source and a backlight lens that generates a luminous intensity of 10% of the total luminous intensity of the second LED light source and a beam angle of 165°.

[0114] Exemplarily, the first annular light source array generates light through the first LED light source, and the light passes through the diffusing lens to generate a light source with a luminous intensity of 10% of the total luminous intensity of the first LED light source and a beam angle of 120°, so as to realize the output of the first light distribution curve. The second annular light source array outputs light through the second annular light source array, and the light passes through the backlight lens to generate a second light distribution curve with a luminous intensity of 10% of the total luminous intensity of the second LED light source and a beam angle of 165°. Through the first annular light source array and the second annular light source array set as above, the light flux under the combined illumination of the first annular light source array and the second annular light source array can satisfy a preset proportional relationship with the illuminated space area, which is conducive to forming ambient light with a large coverage range and improving the applicability of the lighting device in the night environment.

[0115] In an exemplary embodiment, the minimum luminous flux output under the combined illumination of the first annular light source array and the second annular light source array is 1 - 4 lumens.

[0116] Exemplarily, the luminous flux under the combined illumination of the first annular light source array and the second annular light source array is 1 - 4 lumens, which can satisfy most of the lighting space area, so as to form ambient light with a large coverage range and improve the applicability of the lighting device in the night environment.

[0117] In an exemplary embodiment, the color temperature under the combined illumination of the first annular light source array and the second annular light source array is 3900 - 5500K. For example, it can be further 4000K. In this way, it is beneficial to reduce the spatial surface brightness contrast, promote the perception of the spatial contour by people, keep the human eye in the mesopic vision state, and do not affect falling asleep again, thereby improving the applicability of the lighting device in the night environment.

[0118] In an exemplary embodiment, the diameter of the lamp panel is 36 - 166 cm. Such a setting can satisfy the lighting environment of most normal lighting space areas, so that the lighting device can output ambient light with a large coverage range and improve the applicability of the lighting device in the night environment.

[0119] In an exemplary embodiment, through the above lighting device, the first annular light source array and the second annular light source array can be used to illuminate the ceiling surface of the indoor space under combined illumination, and the ceiling surface brightness value can be controlled within 0.01 - 3 cd / m 2 , while controlling the brightness value of 60% - 80% of the ceiling surface area not to be lower than 5% - 15% of the maximum brightness value. The maximum brightness value can be the maximum brightness value of the lighting device during illumination.

[0120] Among them, the brightness value at the edge position of the ceiling surface is 5% - 15% of the brightness value at the central position, and the brightness value at the edge position of the ceiling surface is not lower than 0.001 cd / m 2 .

[0121] In an exemplary embodiment, through the above lighting device, the area brightness value of the ceiling surface under the combined illumination of the first annular light source array and the second annular light source array can be 0.5 - 3 cd / m2.

[0122] In an exemplary embodiment, more than 60% of the ceiling surface area is a circular area formed with the geometric center of the ceiling surface as the center and accounting for more than 60% of the total ceiling surface area, and further is a circular area of 60 - 80%.

[0123] In an exemplary embodiment, through the above lighting device, the illumination area of the ceiling surface under the combined illumination of the first annular light source array and the second annular light source array can be 60% - 80%, and further is 80%.

[0124] In an exemplary embodiment, the reflectivity of the ceiling surface is 60%-90%, and further 85%.

[0125] In an exemplary embodiment, the spatial surfaces include the ceiling surface, wall surfaces, and floor surfaces.

[0126] In an exemplary embodiment, the maximum luminance value of the ceiling surface is controlled within 0.1-3 cd / m 2 , and further within 0.5-1 cd / m 2 .

[0127] In an exemplary embodiment, the maximum illuminance generated on the floor is not greater than 0.90 lx, and the illuminance uniformity is greater than 0.80.

[0128] In an exemplary embodiment, the distance between the upper surface of the lighting device and the ceiling surface is 25-133 cm, and further 30-90 cm.

[0129] The following are some exemplary embodiments of the present application:

[0130] Embodiment 1

[0131] A lighting device for contour lighting of a nighttime indoor environment includes: the distance between the first annular light source array and the center of the circular lamp panel is 115 mm; the axial distance between the outermost annular sub-light source array and the innermost annular sub-light source array within each annular light source array is 6 mm, and the distance between the first annular light source array and the second annular light source array is 24 mm; the first annular light source array generates a spherical light distribution curve with a light intensity of 10% of the total light intensity and a beam angle of 120°, and the second annular light source array generates a batwing light distribution curve with a light intensity of 10% of the total light intensity and a beam angle of 165°; the overall output luminous flux is 2.89 lm (lumens); the overall output color temperature of the lighting device is 4000 K; the diameter of the lamp panel is 46 cm; the linking mechanism is a lamp post with a length of 30 cm.

[0132] As Figure 3 shown, Figure 3 is a schematic diagram of the first light distribution curve output by the first annular light source array, Figure 3 and the first light distribution curve shown in Figure 4 can be a spherical light distribution curve; as Figure 4 shown, Figure 4 is a schematic diagram of the second light distribution curve output by the second annular light source array,

[0133] In the specific implementation process, the lighting device can be installed in the central area of the ceiling surface in a typical indoor space with dimensions of 3.4m×3.4m×3m (length×width×height), a ceiling reflectivity of 70%, a wall reflectivity of 80%, and a floor reflectivity of 40%. The brightness value at the edge position of the ceiling surface is controlled to be 7.17% - 11.39% of the brightness value at the central position, and an area of 60% of the ceiling surface is illuminated.

[0134] The surface brightness contrast of the space is calculated according to the following formula (1):

[0135] (1)

[0136] Where C is the surface brightness contrast, and the larger its value, the greater the brightness contrast of the surface;

[0137] is the gray - level difference between adjacent pixel points; i and j are two adjacent pixel points;

[0138] is the pixel distribution probability of the gray - level difference between adjacent pixel points, which depends on the pixel adjacent mode and can be defined as the "four - nearest - neighbor" for the pixel adjacent mode.

[0139] Through the above settings, it can be obtained that the brightness distribution of the ceiling surface is as Figure 5 shown, the maximum brightness is 0.237 cd / m 2 , and the minimum brightness is 0.017 cd / m 2 . The maximum value of the floor illuminance is not greater than 0.18, and the illuminance uniformity is 0.82, effectively preventing the human eye from entering the photopic vision state and making it difficult to fall asleep. In addition, it can be obtained that the brightness distribution of the wall is as Figure 6 shown, and the brightness contrast of this wall is calculated to be 9.14×10 -6 through formula (1).

[0140] Embodiment 2

[0141] A lighting device for contour lighting of a night - time indoor environment includes: The distance from the first annular light - source array to the center of the circular lamp panel is 100 mm; The axial distance between the outermost annular sub - light - source array and the innermost annular sub - light - source array within each annular light - source array is 0 mm; The light - source array generates a bat - wing light - distribution curve with a 10% light - intensity angle of 155°; The overall output luminous flux is 1 lm; The color temperature of the whole lamp output is 4000 K; The diameter of the lamp panel is 36 cm; The linking mechanism is a lamp post with a length of 25 cm.

[0142] In the specific implementation process, the lighting device can be installed in the central area of the ceiling surface in a typical indoor space with dimensions of 2.8m×2.8m×3m (length×width×height), a ceiling reflectivity of 70%, a wall reflectivity of 80%, and a floor reflectivity of 40%. The brightness value at the edge position of the ceiling surface is controlled to be 6.67%-13.04% of the brightness value at the central position, and an area of 60% of the ceiling surface is illuminated.

[0143] The spatial surface brightness contrast described in this embodiment is the spatial surface brightness contrast calculated according to formula (1) in Embodiment 1, and formula (1) will not be elaborated here.

[0144] Through the above settings, the brightness distribution of the ceiling surface is as Figure 7 shown, the maximum brightness is 0.115 cd / m 2 , and the minimum brightness is 0.009 cd / m 2 . The maximum value of the ground illuminance is not greater than 0.11 lx, and the illuminance uniformity is greater than 0.80.

[0145] In addition, the brightness distribution of the wall surface is as Figure 8 shown, and the brightness contrast of the wall surface calculated by formula (1) is 2.45×10 -6 .

[0146] Embodiment 3

[0147] A lighting device for contour lighting of indoor environment at night includes: the distance between the first annular light source array and the center of the circular lamp panel is 150 mm; the axial distance between the outermost annular sub-light source array and the innermost annular sub-light source array in each annular light source array is 12 mm; the light source array generates a batwing light distribution curve with a 10% light intensity angle of 175°; the overall output luminous flux is 4 lm; the output color temperature of the whole lamp is 4000 K; the diameter of the lamp panel is 46 cm; the connecting mechanism is a lamp pole with a length of 35 cm.

[0148] In the specific implementation process, the lighting device can be installed in the central area of the ceiling surface in a typical indoor space with dimensions of 4m×4m×3m (length×width×height), a ceiling reflectivity of 70%, a wall reflectivity of 80%, and a floor reflectivity of 40%. The brightness value at the edge position of the ceiling surface is controlled to be 9.59%-14.64% of the brightness value at the central position, and an area of 60% of the ceiling surface is illuminated.

[0149] The spatial surface brightness contrast described in this embodiment is the spatial surface brightness contrast calculated according to formula (1) in Embodiment 1, and formula (1) will not be elaborated here.

[0150] From this, the brightness distribution of the ceiling surface is as Figure 9As shown, the maximum brightness is 0.198 cd / m 2 , and the minimum brightness is 0.019 cd / m 2 . The maximum ground illuminance is not greater than 0.35 lx, and the illuminance uniformity is greater than 0.83.

[0151] In addition, the brightness distribution of the wall surface is obtained as shown in Figure 10 . The brightness contrast of this wall surface is calculated to be 8.52×10 -6 through formula (1).

[0152] In addition, the following are some exemplary comparative examples of this application:

[0153] Comparative Example 1

[0154] On the central area of the ceiling surface in a typical indoor space with dimensions of 3.4 m × 3.4 m × 3 m (length × width × height), a ceiling lamp with a diameter of 37.5 cm is installed, and the output luminous flux is adjusted to 2.89 lm for irradiation in the night light mode.

[0155] The brightness distribution of the ceiling surface is obtained as shown in Figure 11 . The maximum brightness is 3.6 cd / m 2 , and the minimum brightness is 0.017 cd / m 2 . The maximum ground illuminance is not greater than 5.21 lx, and the illuminance uniformity is 0.64.

[0156] In addition, the brightness distribution of the wall surface is obtained as shown in Figure 12 . The brightness contrast of this wall surface is calculated to be 1.7×10 -5 . Compared with the effect of Comparative Example 1, the wall surface brightness contrast of Example 1 is reduced by 46.23%. It can be seen that the lighting device for indoor environmental contour lighting provided by this application has a lower wall surface brightness contrast under the night light illumination of a conventional ceiling lamp, which is more conducive to users to quickly perceive the contours of spatial objects.

[0157] Comparative Example 2

[0158] On the central area of the ceiling surface in a typical indoor space with dimensions of 4 m × 3.2 m × 3 m (length × width × height), a ceiling lamp with a diameter of 37.5 cm is installed, and the output luminous flux is adjusted to 3.2 lm for irradiation in the night light mode.

[0159] The brightness distribution of the ceiling surface is obtained as shown in Figure 13 . The maximum brightness is 3.98 cd / m 2, the minimum brightness is 0.017 cd / m 2 , the average ground illuminance is 6.30 lx, and the illuminance uniformity is 0.64.

[0160] In addition, the brightness distribution of the wall surface is obtained as Figure 14 shown. The brightness contrast of the wall surface is calculated by formula (1) to be 3.9×10 -4 . Compared with the effect of Comparative Example 2, the wall surface brightness contrast of Example 2 is reduced by 22.56%. It can be seen that the lighting device for indoor environment contour lighting provided by the present application has a lower wall surface brightness contrast than the conventional ceiling lamp night light lighting, which is more conducive to the user to quickly perceive the contour of space objects.

[0161] Comparative Example 3

[0162] A lighting device for night indoor environment contour lighting provided in Example 1 is changed to illuminate only 40% of the ceiling area, and is installed on the central area of the ceiling in a typical indoor space with dimensions of 3.4 m × 3.4 m × 3 m (length × width × height), a ceiling reflectivity of 70%, a wall reflectivity of 80%, and a ground reflectivity of 40% for irradiation.

[0163] The spatial surface brightness contrast described in this comparative example is the spatial surface brightness contrast calculated according to formula (1) in Example 1, and formula (1) will not be elaborated here.

[0164] Thus, the brightness distribution of the wall surface is obtained as Figure 15 shown. The brightness contrast of the wall surface is calculated by formula (1) to be 1.27×10 -5 . When Example 1 irradiates 60% of the ceiling area, the wall surface brightness contrast is 9.14×10 -6 . Compared with this Comparative Example 3, Example 1 is reduced by 28.03%. It can be seen that the illumination of 60% of the ceiling area by the lighting device of the present application can produce a lower wall surface brightness contrast than irradiating 40% of the ceiling area, and can produce a better lighting effect.

[0165] For the convenience of understanding by those skilled in the art, Figure 16 a wall brightness gray scale map corresponding to the illumination effect formed by the lighting device of Example 1 on the wall is provided; in the specific implementation process, the lighting device can be installed on the central area of the ceiling in a typical indoor space with dimensions of 3.4 m × 3.4 m × 3 m (length × width × height), a ceiling reflectivity of 70%, a wall reflectivity of 80%, and a ground reflectivity of 40%. The brightness value at the edge position of the ceiling is controlled to be 7.17% - 11.39% of the brightness value at the central position, and 60% of the ceiling area is illuminated. Through the above settings, the wall brightness gray scale map can be obtained asFigure 16 as shown

[0166] For the convenience of those skilled in the art to understand Figure 17 a wall brightness grayscale image corresponding to the illumination effect formed by the standard ceiling lamp of Comparative Example 1 on the wall is provided; in the specific implementation process, a standard ceiling lamp with a diameter of 37.5 cm can be installed in the central area of the ceiling surface in a typical indoor space with dimensions of 3.4 m×3.4 m×3 m (length×width×height), a ceiling reflectivity of 70%, a wall reflectivity of 80%, and a floor reflectivity of 40%, and the output luminous flux is adjusted to 2.89 lm for illumination in the night light mode, and the wall brightness grayscale image as shown Figure 17 as shown

[0167] In the description of this specification, the descriptions referring to terms such as "some embodiments", "other embodiments", "ideal embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example

[0168] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification

[0169] The above-described embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims

Claims

1. A lighting device, characterized in that: The device comprises: A light emitting unit, wherein the light emitting unit is provided with a light distribution lens; The light distribution lens is used to enable the light emitting unit to output a pre-configured light distribution curve to the indoor ceiling; Among them, the preconfigured light distribution curve is used to ensure that the brightness value of the target area of ​​the ceiling is not higher than the preset bright vision brightness threshold, and to form a preset brightness gradient from bright to dark from the central position to the edge position of the ceiling; the proportion of the target area to the total area of ​​the ceiling is not less than the preset ratio threshold.

2. The lighting device according to claim 1, characterized in that: The lighting device also includes a lamp panel suspended on the ceiling, the light emitting portion is arranged on the upper surface of the lamp panel, and the light emitting portion includes a first annular light source array and a second annular light source array; wherein, The first annular light source array has the center of the lamp panel as the center of the circle, and the first annular light source array is used to output a first light distribution curve; The second annular light source array has the center of the lamp panel as its center, the radius of the second annular light source array is greater than the radius of the first annular light source array, and the second annular light source array is used to output a second light distribution curve; The first light distribution curve and the second light distribution curve together form the preconfigured light distribution curve.

3. The lighting device according to claim 2, characterized in that: The first annular light source array and the second annular light source array each include at least two annular sub-light source arrays, and each annular sub-light source array includes a plurality of sub-light sources arranged at intervals; In the at least two circles of annular sub-light source arrays, the radial distance between two adjacent circles of annular sub-light source arrays is 4-12 mm; In the at least two circles of annular sub-light source arrays, the axial spacing between the outermost circle of the annular sub-light source array and the innermost circle of the annular sub-light source array is 0-80 mm.

4. The lighting device according to claim 3, characterized in that: The color temperatures of every two adjacent sub-light sources in the annular sub-light source array are different.

5. The lighting device according to claim 2, characterized in that: The distance between the first annular light source array and the second annular light source array is 20-32 mm.

6. The lighting device according to claim 2, characterized in that: The first light distribution curve comprises a spherical light distribution curve with a light intensity of 10% of the total light intensity of the light source and a light beam angle of 105°-125°; The second light distribution curve comprises a bat-wing light distribution curve with a light intensity of 10% of the total light intensity of the light source and a light beam angle of 155°-175°.

7. The lighting device according to claim 2, characterized in that: The first annular light source array includes a first LED light source, and a diffusive lens that generates a light intensity of 10% of the total light intensity of the first LED light source and a light beam angle of 120°; The second annular light source array includes a second LED light source and a backlight lens that generates a light intensity that is 10% of the total light intensity of the second LED light source and a light beam angle of 165°.

8. The lighting device according to claim 1, characterized in that: The lighting device also includes a lamp panel suspended on the ceiling, and the diameter of the lamp panel is 36-166 cm.

9. The lighting device according to claim 1, characterized in that: The lighting device also includes a power source for supplying power to the light-emitting portion, and a linking mechanism for connecting to a ceiling surface.

10. The lighting device according to claim 9, characterized in that: The linking mechanism includes a lamp pole or a steel wire arranged at the center of the lamp panel of the lighting device and used for connecting to the ceiling.

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