CN115325470B

CN115325470B - Manufacturing five-primary-color full-spectrum multi-color temperature light source by red, green, blue, yellow and white LED light mixing technology

Info

Publication number: CN115325470B
Application number: CN202210942601.9A
Authority: CN
Inventors: 邓明鉴; 苏承勇; 曾凡文
Original assignee: Chongqing Green Technology Smart City Construction Co ltd; Chongqing Green Science And Technology Development Group Co ltd
Current assignee: Chongqing Green Technology Smart City Construction Co ltd; Chongqing Green Science And Technology Development Group Co ltd
Priority date: 2022-08-08
Filing date: 2022-08-08
Publication date: 2023-06-16
Anticipated expiration: 2042-08-08
Also published as: CN115325470A

Abstract

The invention discloses a five-primary-color full-spectrum multicolor temperature light source manufactured by a red, green, blue, yellow and white LED light mixing technology, which comprises a substrate, two single-primary-color light emitting units along the central axis of the substrate, and a multi-primary-color light emitting unit matrix respectively arranged at two sides of the central axis, wherein each column of the multi-primary-color light emitting unit matrix comprises two primary-color light emitting units of two primary colors, each single-primary-color light emitting unit is any one primary-color light emitting unit of white, green, yellow, blue and red, and any two primary-color light emitting units of red, blue and green are not adjacent; when the five-primary full-spectrum multi-color temperature light source is electrified, light rays emitted by the single-primary light emitting units are incident from the incident surface of the lens, transmitted by the lens, emitted from the emergent surface of the lens, and mixed with light rays emitted by other single-primary light emitting units and emitted from the emergent surface of the corresponding lens in a target area, so that full-spectrum white light with two sides stronger than the central light intensity is obtained.

Description

Manufacturing five-primary-color full-spectrum multi-color temperature light source by red, green, blue, yellow and white LED light mixing technology

Technical Field

The invention relates to the field of LED light sources, in particular to a five-primary-color full-spectrum multicolor temperature light source manufactured by a red, green, blue, yellow and white LED light mixing technology.

Background

Along with the development of the LED technology, the LED technology is widely applied to illumination, such as an LED street lamp, an LED desk lamp and the like, and the LED has the advantages of strong shock resistance, small heating value, low energy consumption, long service life and the like, so that the LED is widely applied to street lamp illumination, and the energy consumption is reduced for urban illumination.

Most of the existing urban LED street lamps still adopt a fixed color temperature and brightness for illumination, for example, yellow light is adopted for illumination, the brightness of the street lamps is always the same brightness, and the color temperature is single. With the demand of urban development, urban traffic roads present diversified designs. For example, various green plants or flowers with gorgeous colors are planted on both sides of the road for the purposes of urban beauty and air purification; for another example, there are many ancient buildings on both sides of the road, or many pictures are drawn on the buildings on both sides of the road for the purposes of beautifying the environment, attracting tourists, etc., so as to construct net red stuck points. The diversified designs have higher requirements on the color temperature, the brightness and the like of the road lamp on the corresponding road section, and different road environments are also suitable for different color temperatures, brightness and the like. Existing LED street lamps are not capable of meeting the needs of such diverse design roads.

Disclosure of Invention

The invention aims to provide a five-primary-color full-spectrum multi-color temperature light source manufactured by a red, green, blue, yellow and white LED light mixing technology, which overcomes or alleviates the problem of fixed color temperature in the traditional street lamp to a certain extent.

In order to alleviate the problems, the invention adopts the following technical scheme:

the invention aims to provide a five-primary-color full-spectrum multicolor temperature light source manufactured by a red, green, blue, yellow and white LED light mixing technology, which comprises a substrate and is characterized by further comprising the following components: the LED display device comprises two single-basic-color light emitting units along the central axis of a substrate and multiple-basic-color light emitting unit matrixes respectively arranged at two sides of the central axis, wherein each column of the multiple-basic-color light emitting unit matrixes comprises two single-basic-color light emitting units of basic colors, each single-basic-color light emitting unit is any one of white, green, yellow, blue and red, and any two of the red, blue and green light emitting units are not adjacent; wherein, each single-basic-color light-emitting unit is correspondingly provided with a lens;

when the five-primary-color full-spectrum light source is electrified, light rays emitted by the single-primary-color light emitting unit are incident from the incident surface of the lens, are transmitted by the lens and then are emitted from the emitting surface of the lens, and are mixed with light rays emitted by other single-primary-color light emitting units and emitted from the emitting surface of the corresponding lens in a target area, so that full-spectrum white light with two sides stronger than central light intensity is obtained;

The thickness between the emergent surface and the incident surface is gradually increased from one side to the other side along the Y-axis direction, so that an emergent angle formed by emergent light rays along the Y-axis direction after the emergent light rays are emergent from the emergent surface is 45-65 degrees, and the deflection angle of the emergent light rays is 10-15 degrees; the thickness between the emergent surface and the incident surface is gradually increased from the central area to two sides, so that an emergent angle formed along the X-axis direction after emergent light rays are emergent from the emergent surface is 150-162 degrees.

In some embodiments, the matrix of multi-primary light emitting elements has single-primary light emitting elements of at least one different primary color between two adjacent columns.

In some embodiments, a column of the matrix of multi-primary light emitting elements adjacent to the central axis has at least one single-primary light emitting element of a different primary color than two single-primary light emitting elements located on the central axis.

In some embodiments, a column of the matrix of multi-primary light emitting elements furthest from the central axis has at least one single-primary light emitting element of a different primary color than two single-primary light emitting elements located on the central axis.

In some embodiments, a single-primary color light-emitting element having at least two different primary colors is located between a column of the two multi-primary color light-emitting element matrices furthest from the central axis.

In some embodiments, the spacing between adjacent two single-color light emitting elements in each column of the matrix of multi-color light emitting elements is 10mm-15mm.

In some embodiments, the spacing between adjacent columns in the matrix of multi-primary light emitting elements is 24mm-31.6mm.

In some embodiments, the white light emitting elements in each column of the matrix of multi-primary light emitting elements have a duty cycle of 40% -80%.

In some embodiments, the incident surface is pretreated such that microstructures are uniformly distributed on the surface of the incident surface.

In some embodiments, two single-color light emitting units located in the central axis direction are a white light emitting unit and a yellow L light emitting unit, respectively.

The beneficial effects are that:

according to the five-primary-color full-spectrum multicolor temperature light source manufactured by the red, green, blue and yellow LED light mixing technology, other primary-color light emitting units are arranged between the red, green and blue three-primary-color light emitting units, and each single-primary-color light emitting unit is independently provided with one lens, so that light rays emitted by each single-primary-color light emitting unit lens are mixed in a target area to obtain full-spectrum white light, a certain independent spectrum of each primary color is reserved in the full-spectrum white light, and the problems that the independent spectrum reserved quantity is lower and even the independent spectrum of each primary-color light emitting unit is difficult to reserve due to the fact that the light source is mixed under the same lens of the red, green and blue three-primary-color light emitting units and the white light emitting unit packaging device are avoided, so that the light source spectrum has multiple elements and spectrum energy of different wave bands can be distinguished are solved; meanwhile, the problem that when light source is used for mixing light, polarized light is generated due to simultaneous mixing of red, green and blue light is avoided.

According to the full-spectrum multi-color temperature light source, each single-base-color light emitting unit is independently packaged, and a certain interval is reserved between every two adjacent single-base-color light emitting units, so that the problem that heat dissipation is difficult due to the fact that multi-base-color LEDs are packaged under one lens at the same time is solved.

The full-spectrum multi-color temperature light source has a larger light spot range after light mixing in a target area.

The corresponding primary color light-emitting branch of the full-spectrum multicolor temperature light source can be adjusted to be turned on or turned off and the brightness by the corresponding adjusting circuit, so that the current value corresponding to each primary color light-emitting branch can be adjusted and controlled according to different road sections to adjust the color temperature of the full-spectrum multicolor temperature light source, thereby being suitable for the requirements of different color temperatures of different road sections or adjusting the brightness of the full-spectrum multicolor temperature light source to be suitable for the requirements of different brightness of different road sections.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale. It will be apparent to those of ordinary skill in the art that the drawings in the following description are of some embodiments of the invention and that other drawings may be derived from these drawings without inventive faculty.

FIG. 1a is a schematic diagram of a full spectrum multi-color temperature light source according to an exemplary embodiment of the present invention;

FIG. 1b is a top view of the full spectrum multi-color temperature light source of FIG. 1 a;

FIG. 1c is a top view of the lens looking down in the direction of the optical axis LA;

FIG. 2a is a diagram of a five primary color LED distribution in a full spectrum multi-color temperature light source according to an exemplary embodiment of the present invention;

FIG. 2b is a diagram of a five primary color LED distribution in a full spectrum multi-color temperature light source according to another exemplary embodiment of the present invention;

FIG. 2c is a diagram showing the distribution of five primary LEDs in a full spectrum multi-color temperature light source according to yet another exemplary embodiment of the present invention;

FIG. 2d is a diagram showing the distribution of five primary LEDs in a full spectrum multi-color temperature light source according to yet another exemplary embodiment of the present invention;

FIG. 3 is a cross-sectional view of the full spectrum multi-color temperature light source H-H of FIG. 1 b;

FIG. 4 is an enlarged view of a portion of FIG. 3;

FIG. 5 is a cross-sectional view of the full spectrum multi-color temperature light source B-B of FIG. 1B;

FIG. 6 is an enlarged view of a portion of FIG. 5;

FIG. 7a is a spectrum of a control group;

FIG. 7b is a spectral diagram of the experimental group;

FIG. 7c is a partial comparative table of parameters for the control and experimental groups;

FIG. 8 is a comparative table of independent spectral retention for control and experimental groups;

FIGS. 9a and 9b are circuit diagrams of five primary color LED modules in a full spectrum multi-color temperature light source according to an exemplary embodiment of the present invention;

FIG. 10a is a circuit diagram of a driving module in a full spectrum multi-color temperature light source according to an exemplary embodiment of the present invention;

FIG. 10b is a circuit diagram of a drive module in a full spectrum multi-color temperature light source according to another exemplary embodiment of the present invention;

FIG. 11a is a circuit diagram of a dimming module in a full spectrum multi-color temperature light source according to an exemplary embodiment of the present invention;

FIG. 11b is a circuit diagram of a dimming module in a full spectrum multi-color temperature light source according to another exemplary embodiment of the present invention;

FIG. 12 is a circuit diagram of a second voltage conversion circuit and a third voltage conversion circuit in a power module of a full spectrum multi-color temperature light source according to an exemplary embodiment of the present invention;

FIG. 13a is a circuit diagram of a first voltage conversion circuit in a power module of a full spectrum multi-color temperature light source according to an exemplary embodiment of the present invention;

FIG. 13b is a circuit diagram of a first voltage conversion circuit in a power module of a full spectrum multi-color temperature light source according to another exemplary embodiment of the present invention;

FIG. 14 is a circuit diagram of a master control module in a full spectrum multi-color temperature light source according to an exemplary embodiment of the invention;

fig. 15 is a graph showing the light distribution curve of a full spectrum multi-color temperature light source according to an exemplary embodiment of the present invention.

Reference numerals: 01-base plate, 02-lens, 021-emergent face, 022-incident face; 03-LED chip.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In this document, suffixes such as "module", "component", or "unit" used to represent elements are used only for facilitating the description of the present utility model, and have no particular meaning in themselves. Thus, "module," "component," or "unit" may be used in combination. The terms "upper," "lower," "inner," "outer," "front," "back," "rear," "one end," "the other end," "length," "width," and the like herein refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present utility model. The terms "mounted," "configured to," "connected," and the like, herein, are to be construed broadly as, for example, "connected," whether fixedly, detachably, or integrally connected, unless otherwise specifically defined and limited; the two components can be mechanically connected, can be directly connected or can be indirectly connected through an intermediate medium, and can be communicated with each other. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. The expression "electrically connected" of two components herein means that no electrical connection between the components essentially affects the function provided by the device. For example, two components may be considered electrically connected, even though there may be little resistance between them, but they do not materially affect the function provided by the device (in practice, the line connecting the two components may be considered a small resistance); likewise, two components may be considered electrically connected even though there may be additional electronic components between them that cause the device to perform additional functions without substantially affecting the functions provided by the device, which is identical to a device that does not include additional components; likewise, two components that are directly connected to each other or to opposite ends of a wire or trace on a circuit board or other medium are electrically connected. Here, the expression that two components in an apparatus are electrically connected is different from the expression that two components are directly electrically connected, which means that there is no other electrical connection between the two components. As used herein, the expression "adjacent" means that the individual features, components, elements or units are close together or have short distances, but are not necessarily in contact with each other. Accordingly, "non-adjacent" means that the features, components, elements, or units are not closer together, or are more distant. For example, red, blue and green LEDs are not adjacent, meaning that if the red LEDs are in a matrix or array, the nearest one of the front, back, left, right, and right LEDs cannot be either blue or green LEDs; alternatively, if the blue LEDs are in a matrix or array, the closest one of the front, back, left, right, cannot be either a red LED or a green LED. Herein, the "target region" refers to a region to which light emitted from a light source is required to be irradiated and a peripheral region (e.g., an upper space, or both sides) thereof. For example, a section of a roadway and its surrounding environment on both sides. Herein, "optical axis" refers to the center line of the light beam. For example, when one LED chip is used under each lens, the center line of the light beam emitted by the LED chip is the optical axis. For another example, when a plurality of, e.g., four, LED chips are employed under each lens, the center line of the total light beam formed by the plurality of LED chips is the optical axis. Herein, "light incident surface" and "light exiting surface" refer to surfaces through which light passes. The light incident surface and the light emergent surface of the lens 02 are not limited to the curved surface or the free curved surface in the following embodiments, and certain changes and modifications are also possible on the basis of the curved surface or the free curved surface, so long as the light ray after the light path is adjusted by the lens has the light efficiency in the following embodiments. Herein, an "independent spectrum" is compared to a "full spectrum". Specifically, "independent spectrum" herein refers to a spectrum of monochromatic light, for example, a spectrum of white light emitted by a white LED, a spectrum of red light emitted by a red LED, and a spectrum of green light emitted by a green LED. The "full spectrum" refers to the spectrum of the polychromatic light, for example, the spectrum of the polychromatic light obtained by mixing the light emitted by the five primary color LEDs in the embodiment herein. In the present application, the optical path of the light emitted by each light emitting unit is changed through the lens, so that natural light mixing is performed only in the target area (that is, the light is mixed only when the light is naturally overlapped or converged in the air under the action of no lens), but because the lens is not used, the light of each primary color does not all overlap or converge with the light of other primary colors in the area, so that the independent spectrum of each primary color can be reserved to a greater extent, for example, 1/3 to 1/2 is reserved. Herein, the "target area" refers to the end point of the optical path of each light emitted from the light source and the vicinity thereof. For example, light rays emitted from a light source in a street lamp start to meet or mix in the upper air (including the inclined upper air, the right upper air and the like) of a certain road section, and rectangular light spots are formed on the ground of the road section, wherein the road section area with the rectangular light spots is the light path end point; and the road section area and the upper space thereof are the target areas. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Herein, "and/or" includes any and all combinations of one or more of the associated listed items. Herein, "plurality" means two or more, i.e., it includes two, three, four, five, etc. As used herein, "and/or" includes any and all combinations of one or more of the associated listed items. Herein, "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Embodiment one: referring to fig. 1, a schematic diagram of a five-primary full-spectrum multi-color temperature light source according to an exemplary embodiment of the present invention is shown. Specifically, the five-primary full-spectrum multi-color temperature light source comprises a substrate 01, two single-primary light-emitting units arranged along the central axis of the substrate 01, and a multi-primary light-emitting unit matrix respectively arranged at two sides of the central axis, wherein each column of the multi-primary light-emitting unit matrix comprises a plurality of single-primary light-emitting units of two primary colors, the single-primary light-emitting units are any one of white, green, yellow, blue and red, any two of the red, blue and green light-emitting units on the substrate are not adjacent, and each single-primary light-emitting unit is correspondingly provided with a lens 02; when the full spectrum light source is connected with a power supply, light rays emitted by the single-primary-color light emitting units are incident from an incident surface 022 of the lens 02, transmitted by the lens 02, emitted from an emergent surface 021 of the lens, and mixed with light rays emitted by other single-primary-color light emitting units after being emitted by the emergent surfaces 021 of the corresponding lenses 02 in a target area, so that full spectrum white light with two sides stronger than central light intensity and independent spectrum of each primary color is reserved.

In some embodiments, the two single-base color light emitting units located on the central axis are a white light emitting unit and a yellow light emitting unit, respectively. In some embodiments, a matrix of multi-primary light emitting elements has single-primary light emitting elements of at least one different primary color between adjacent columns. In some embodiments, a column of the matrix of multi-primary color light emitting elements near a central axis of the substrate 01 has at least one single-primary color light emitting element of a different primary color from two single-primary color light emitting elements located on the central axis. In some embodiments, a column of the matrix of multi-primary light emitting elements furthest from the central axis has at least one single-primary light emitting element of a different primary color than two single-primary light emitting elements located on the central axis. In some embodiments, a single-primary color light-emitting element having at least two different primary colors is located between a column of the two multi-primary color light-emitting element matrices furthest from the central axis. In some embodiments, the spacing d2 between adjacent two single-color light emitting cells in each column of the matrix of multi-primary color light emitting cells is 10mm-15mm. In some embodiments, the spacing d1 between adjacent columns in the matrix of multi-primary light emitting elements is 24mm-31.6mm. In some embodiments, the white light emitting elements in each column of the matrix of multi-primary light emitting elements have a duty cycle of 40% -80%. In some embodiments, the incident surface 022 of the lens 2 is pretreated such that the surface of the incident surface is uniformly distributed with microstructures, for example, grooves, protrusions, or nano-microstructures.

Referring to fig. 5, in some embodiments, the thickness between the exit face 021 and the incident face 022 of the lens 02 increases gradually from one side to the other side along the width direction of the substrate (i.e. the Y-axis direction in fig. 1 b), so that the exit angle formed by the light rays along the width direction of the substrate 01 after exiting through the exit face 021 is 45-65 °, and the deflection angle of the exiting light rays (i.e. the angle between the exiting light rays and the vertical plane) is 10-15 °.

Referring to fig. 4, in some embodiments, the thickness between the exit face 021 and the entrance face 022 increases gradually from the central area of the entrance face 022 to two sides (i.e. the X-axis direction in fig. 1 b), so that the exit angle formed along the length direction (i.e. the X-axis direction in fig. 1 b) of the substrate 01 after the light is emitted from the exit face 021 is 150 ° -162 °.

Referring to fig. 1b, in some embodiments, the single base color light emitting unit under each lens may employ four LED chips 03 of the same power and the same color, for example, four 1W white LEDs; alternatively, four 1W red LEDs, or four 1W blue LEDs, or four 1W green LEDs, or four 1W yellow LEDs are employed. Of course, in other embodiments, a single-color light emitting unit under each lens may also employ an LED chip 03 with a power of 5W; or two LED chips 03 with the same power and the same color can be adopted by a single-base-color light-emitting unit under each lens. The number of the LED chips with the same power and the same color corresponding to the single-base-color light-emitting units under each lens can be adjusted according to the power of the actual lamp and the power of the selected LED chips.

Referring to fig. 1, 3 and 5, in some embodiments, a lens main board is disposed on the substrate 01, where a lens 02 is disposed on the lens main board at a position corresponding to each single-base color light emitting unit (as shown in fig. 1b, each 4 LED chips is a single-base color light emitting unit, or as shown in fig. 2 a-2 d, one LED chip is a single-base color light emitting unit), that is, a lens array is disposed on the lens main board, and the lens array corresponds to the single-base color light emitting unit array (including two single-base color light emitting units on a central axis and multiple-base color light emitting unit matrices on two sides thereof) on the substrate 01 one by one.

In some embodiments, the lens 02 includes: an aspherical lens body having an elliptical top shape, the lens body having an incident surface 022 on which light emitted from the single-base color light emitting unit is incident, and an exit surface 021 on which light incident from the incident surface 022 is emitted, as shown in fig. 4 and 6. Specifically, the incident surface 022 is formed by recessing a first surface of the lens body near the single-base color light emitting unit side along the Z-axis direction; the emergent face 021 is formed by protruding the second surface of the lens body away from the single-primary-color light-emitting unit side along the axis Z direction.

Referring to fig. 4, in some embodiments, in the plan view, a vertical direction is a Y axis, a horizontal direction is an X axis, an intersection of the X axis and the Y axis is a center, an axis passing through the center and perpendicular to the X axis and the Y axis is a Z axis, that is, a central axis CA of the lens, and the central axis CA coincides with an optical axis LA of the single-color light emitting unit. Referring to fig. 4, in some embodiments, the entrance face 022 and exit face 021 are each symmetrical in shape about the Y-axis as an axis of symmetry, or symmetrical about a cross-section that includes the Y-axis and the central axis CA. In some embodiments, the exit surface 021 of the lens 02 has an elliptical shape, as viewed from the central axis CA, with the central axis CA being the major axis extending in the X-axis direction and the minor axis extending in the Y-axis direction. Specifically, referring to fig. 4, the two ends of the exit face 021 extending in the X-axis direction are the same in size, or the widths Y1 and Y2 of the two ends extending in the X-axis direction extending in the Y-axis satisfy: y1=y2; and the two ends extending along the Y-axis direction are the same in size, or the widths X1 and X2 of the two ends extending along the Y-axis direction along the X-axis are as follows: x1=x2; and the length of the two ends of the long axis of the emergent face 021 extending along the X-axis direction orthogonal to the central axis CA is longer than the length of the short axis extending along the Y-axis direction orthogonal to the central axis CAI and the X-axis. In some embodiments, the incident surface 022 has a shape as viewed from the direction of the central axis CAI, and is egg-shaped or drop-shaped with the central axis CA as the center, and has a smaller end and a larger end. Specifically, referring to fig. 1c, widths x1 'and x2' of both ends of the incident surface 022 extending along the Y axis, each of which extends along the x axis, satisfy: x1 '> x2'; and the two ends of the incident surface 022 extending along the X-axis direction are the same in size, or the widths Y1 'and Y2' of the two ends of the incident surface extending along the X-axis and extending along the Y-axis respectively satisfy: y1 '=y2'; the length of the incident surface 022 extending in the X-axis direction orthogonal to the central axis CA is smaller than the length extending in the Y-axis direction orthogonal to the central axis CA and orthogonal to the X-axis. Referring to fig. 4, in some embodiments, the exit face 021 of the lens 02 has an apex P on a central axis CA in a cross section comprising the X-axis and the central axis CA; while the incidence surface 022 of the lens 02 has an apex Q on the central axis CA in a cross section including the X-axis and the central axis CA. In some embodiments, in a cross section including the X-axis and the central axis CA, the thickness between the entrance face and the exit face located on both sides of the central axis CA gradually increases from the central axis CA toward both sides, that is, the thickness of the regions on both sides of the entrance face and the exit face is greater than the thickness of the region in between the entrance face and the exit face. Specifically, referring to fig. 3 and 4, the height of the vertex Q on the central axis CA is smaller than the height of the vertex P on the central axis CA, and the width |x1'-X2' | of the incident surface 022 from which the vertex Q expands in the X-axis direction in the cross section is smaller than the width |x1-x2| of the exit surface 021 from which the vertex P expands in the X-axis direction in the cross section. In some embodiments, in a cross-section including the X-axis and the central axis CA, the first decreasing speed of the height of both sides of the incident face 022 in the Z-axis direction from the vertex Q is greater than the second decreasing speed of the height of both sides of the exit face 021 in the Z-axis direction from the vertex P.

In some embodiments, in a cross section comprising the Y-axis and the central axis CA, the lens exhibits a thin end and a thick end, i.e. the thickness between the entrance and exit faces increases gradually from the central axis CA towards one side away from the central axis CA (but converges gradually at the end) and decreases gradually towards the other side away from the central axis CA. Specifically, referring to fig. 5 and 6, in a cross section including the Y axis and the central axis CA, the highest point (or vertex) Q 'of the incident surface 022 in the Z axis direction is located on one side (e.g., right side in fig. 6) of the central axis CA, while the highest point (or vertex) P' of the exit surface 021 in the cross section in the Z axis direction is located on the other side (e.g., left side in fig. 6) of the central axis CA, and the width of the incident surface 022 in the Y axis direction from the vertex Q 'in the cross section is smaller than the width of the exit surface 021 in the Y axis direction from the vertex P' thereof. Of course, in other embodiments, the highest point (or vertex) of the exit face 021 along the Z-axis direction in the cross section is located on the central axis CA. In some embodiments, in a cross section including the Y-axis and the central axis CA, one side of the incident surface 022 having the vertex Q' is arc-shaped or quarter-circle-shaped, and the other side extends approximately straight in the Y-axis direction; both sides of the emergent surface 021 are arc-shaped, and the arc length or radius of one side arc with the vertex P' is larger than that of the other side arc.

The material of the lens 02 is not particularly limited as long as light having a desired wavelength can pass therethrough. For example, the material of the lens 02 is a light-transmitting resin such as polymethyl methacrylate (PMMA), polycarbonate (PC), or epoxy resin (EP), or glass.

Referring to fig. 15, in some embodiments, the full spectrum multi-color temperature light source shown in fig. 1b has polar light distribution curves in a cross section comprising an X-axis and a central axis CA, and a cross section comprising a Y-axis and a central axis CA, respectively, wherein curve I corresponds to the light distribution curve of the full spectrum multi-color temperature light source in a cross section comprising an X-axis and a central axis CA; curve II corresponds to the light distribution curve of the full spectrum multi-color temperature light source in the section comprising the Y axis and the central axis CA; where, latitude coordinates (polar angle) represent angles of light rays deviating from the optical axis LA, and longitude coordinates (polar axis) represent light intensities of the light rays. It should be noted that, the values of the longitude coordinates in fig. 15 only represent the relative intensity ratio of the light in each angular distribution, and do not represent the actual light intensity, because the specific values will also change when the number/power of the LEDs in each single-color light emitting unit in the full-spectrum multi-color temperature light source is changed. As shown in fig. 15, in a cross section including the X-axis and the central axis CA, the light intensities are symmetrically distributed about the O-degree polar axis, and the peak light intensity of the light emitted from each single-color light emitting unit appears within 55-65 degrees from the optical axis LA after the light path is adjusted by the corresponding lens. Preferably, the light intensity of the light rays in the range between 58-63 degrees, while the light rays in the range of 0-58 degrees deviated from the optical axis LA are gradually intensified and are not much different from the peak light intensity; when the angle of the light ray deviated from the optical axis LA is larger than 63 degrees, the larger the deviation angle thereof is, the smaller the light intensity is. The light ray angle of departure tends to O at about 72 degrees. As shown in fig. 15, in a section including the Y-axis and the central axis CA, the light emitted from each single-color light emitting unit has its peak light intensity appearing on one side of the optical axis LA and within a range of 10-35 degrees from the optical axis LA after the light path is adjusted by the corresponding lens. Preferably, a light intensity peak occurs at 30 degrees offset from the optical axis LA toward the side, and after the peak occurs, the light intensity is gradually reduced toward the side offset optical axis LA, and reaches a minimum value at about 51 degrees offset from the optical axis LA toward the side; and the light intensity peak of the light emitted by the full-spectrum multi-color temperature light source appears on the optical axis LA.

The full spectrum multi-color temperature light source is characterized in that a) in the section comprising an X axis and a Z axis (or a central axis CA), emitted light is combined with the object to be irradiated or the distance of a road is changed, so that the illuminance of the road is relatively uniform; b) In a section including the Y-axis and the Z-axis, the intensity of the emitted light is relatively concentrated and is significantly deflected to one side. That is, the rectangular light shape with strong directivity illumination in a wide range in the longitudinal direction (i.e., X-axis direction) and a small range in the width direction (i.e., Y-axis direction) of the lens body is suitable for applications in special occasions such as roads, tunnels, hallways, and the like.

In addition, since the thickness of the two sides of the lens 02 extending along the X-axis is greater than the middle thickness, which contributes to one of the factors that the intensity of the outgoing light on the two sides is greater than the middle light intensity, the overall light intensity effect can be adjusted by adjusting the difference between the thickness of the two sides of the lens 02 and the thickness of the middle area. Similarly, because the thickness of the two ends of the lens 02 extending along the Y axis is different, one of the factors of different light intensities of the upper and lower (or front and rear) sides is promoted, the overall polarization effect can be adjusted by adjusting the difference between the thicknesses of the upper and lower (or front and rear) sides of the lens extending along the Y axis.

In this embodiment, the lens is used as a beam control component, that is, the lens is used to adjust the travelling direction of the light emitted by the light source, so that after the light emitted by each single-primary-color light emitting unit is emitted for a certain distance, light mixing (or secondary light mixing) is performed in the target area to obtain the multi-color white light, instead of directly mixing the light emitted by each primary-color light emitting unit through the lens, and then the multi-color full-spectrum white light is emitted after the multi-color white light is obtained.

By arranging the lenses, the light rays emitted by adjacent single-color light emitting units which are arranged at intervals are partially overlapped in a target area, for example, the overlapped or intersected light rays account for one third to one half of the total light rays (or luminous flux) emitted by the single-color light emitting units (the light ray retention of each primary color in the complex-color white light is generally only 0.2), so that the color rendition of the light source is improved.

Referring to fig. 2a, a schematic diagram of the distribution of each single-color light emitting unit in a full-spectrum multi-color temperature light source according to an exemplary embodiment of the present invention is shown: wherein, two single-basic-color light-emitting units which are arranged on the central axis at intervals of a second interval are distributed into a white light-emitting unit and a yellow light-emitting unit; the multi-primary color luminous element matrix positioned on the left side of the central axis comprises four columns which are arranged at equal intervals with a first interval d1, and single-primary color luminous elements in each column are arranged at equal intervals with a second interval d2, wherein the first column which is close to the central axis comprises two white luminous elements, a red luminous element and two white luminous elements from top to bottom; the second column positioned at the left side of the first column comprises two white light emitting units, a yellow light emitting unit and two white light emitting units from top to bottom; the third column located at the left side of the second column includes white light emitting units located at the top and bottom, and three yellow light emitting units disposed between the two white light emitting units at equal interval with a second interval d 2; the fourth column located at the left side (i.e., at the leftmost side) of the third column includes green light emitting units located at the top and bottom, and three white light emitting units disposed between the two green light emitting units; the multi-primary color luminous element matrix positioned on the right side of the central axis comprises four columns which are arranged at equal intervals with a first interval d1, and each single-primary color luminous element in each column is arranged at equal intervals with a second interval d 2; wherein the first column near the central axis (i.e., at the leftmost side) includes two white light emitting units, a red light emitting unit and two white light emitting units, which are arranged at equal intervals from top to bottom with a second interval d 2; the second column positioned on the right side of the first column includes two white light emitting units, a yellow light emitting unit and two white light emitting units which are arranged at equal intervals from top to bottom with a second interval d 2; the third column, which is located at the right side of the second column, includes white light emitting units at the top and bottom, and three yellow light emitting units disposed between the two white light emitting units at equal interval with a second interval d 2; the fourth column, which is positioned on the right side of the third column, includes blue light emitting units positioned at the top and bottom, and three white light emitting units disposed between two green light emitting units at equal interval intervals of a second interval d 2.

In some embodiments, the first pitch refers to a distance between central axes or optical axes LA of two single-color light emitting units on the same horizontal line in two adjacent columns.

According to the full-spectrum multicolor-temperature light source, as one lens is arranged for each single-base-color light-emitting unit, light rays emitted by each single-base-color light-emitting unit are obtained by mixing light in a target area after passing through the lens, full-spectrum white light with independent spectrums of each base color is reserved, and under the same condition, compared with the full-spectrum white light obtained by mixing light of five-base-color LEDs packaged under one lens, the color rendering index and the color temperature are higher.

To verify that the color rendering index and color temperature of the present exemplary full-spectrum multi-color temperature light source are high, a control test was performed: 1) Setting a control group: the five-primary color LEDs are packaged under one lens together (namely, a white LED, a red LED, a blue LED, a green LED, a yellow LED, and the red LED, the blue LED, the green LED and the yellow LED surround the white LED), and then are combined with other five-primary color LEDs packaged together to obtain the five-primary color full-spectrum multicolor temperature light source. 2) Test groups were set: the full spectrum multi-color temperature light source as shown in fig. 2a has the same power as the control group. 3) The control group and the experimental group are respectively connected with the same power supply, and the full spectrum multi-color temperature light sources emitted by the control group and the experimental group are respectively detected by utilizing a spectrum illuminance analyzer, so that a spectrum diagram of the control group is shown in fig. 7a, a spectrum diagram of the experimental group is shown in fig. 7b, and a correlation parameter comparison table is shown in fig. 7 c. As can be seen from fig. 7a and 7 b: red light is used as a primary color in the control group, the spectrum value of the red light is 576.0nm wavelength, and the spectrum value of the red light is 3.514; in the experimental group, red light is used as a primary color, the maximum spectrum value is the red light with the wavelength of 527.0nm, and the spectrum value is 3.500. As can be seen from fig. 7 c: illuminance E of the control group is 2219lx, and illuminance E of the experimental group is 2334lx; the color temperature of the control group is 5033K, and the color temperature of the experimental group is 5967K, namely the color temperature of the experimental group is larger than that of the control group; the color rendering index Ra of the control group is 80.1, and the color rendering index Ra of the experimental group is 88.6, namely, the color rendering index Ra of the experimental group is larger than that of the control group; and the color rendering indexes R1-R15 of the experimental group are all larger than the color rendering indexes R1-R15 of the control group.

Referring to fig. 2b, a schematic distribution diagram of each single-color light emitting element in a full-spectrum multi-color temperature light source according to another exemplary embodiment of the present invention is shown, which is similar to the principle of the above-mentioned distribution method, except that the top and bottom of the fourth column in the left multi-color light emitting element matrix are blue light emitting elements, and the top and bottom of the fourth column in the right multi-color light emitting element matrix are green light emitting elements.

Referring to fig. 2c and fig. 2d, a schematic distribution diagram of each single-base light emitting unit in a full-spectrum multi-color temperature light source according to another exemplary embodiment of the present invention is the same as the principle of the above-mentioned distribution manner, except that positions of the red light emitting unit, the green light emitting unit and the blue light emitting unit are adjusted, that is, original red light emitting units in the first columns on two sides of the central axis are replaced with green light emitting units or blue light emitting units, correspondingly, original green light emitting units in the two fourth columns are replaced with red light emitting units or blue light emitting units, and original blue light emitting units are also replaced with red light emitting units or green light emitting units adaptively.

In the present exemplary embodiment, the red light emitting unit, the blue light emitting unit, and the green light emitting unit are separately disposed, so that the problem that the three primary color light emitting units are too closely spaced and mixed under the same lens to cause the generation of polarized light by the three color mixed light is avoided.

In this exemplary embodiment, by reasonably setting the interval between the single-primary color light emitting units and configuring the lens with the specific structure for each single-primary color light emitting unit, the light path of the light emitted by the corresponding single-primary color light emitting unit is adjusted, so that the light emitted by each single-primary color light emitting unit is mixed in the target area, and therefore, the independent spectrum of each primary color can be reserved to a greater extent.

Embodiment two: the present invention also provides another full spectrum multi-color temperature light source, comprising: the LED module comprises a substrate, a power module, a five-primary-color LED module, an LED driving module, a main control module and a dimming module, wherein the power module, the five-primary-color LED module, the LED driving module, the main control module and the dimming module are integrated on the substrate. In some embodiments, the power module is electrically connected to each module for providing power to each module.

In some embodiments, the power module specifically includes: the first voltage conversion circuit is used for converting the input direct-current voltage into 12V stable direct-current voltage; the second voltage conversion circuit is used for converting the 12V stable direct current voltage output by the first voltage conversion circuit into 3.6V stable direct current voltage; and the third voltage conversion circuit is used for converting the 3.6V stable direct current voltage output by the second voltage conversion circuit into 3.3V stable direct current voltage.

In some embodiments, referring to fig. 13a, the first voltage conversion circuit includes a DC-DC buck chip U11 and its peripheral circuits; referring to fig. 12, the second voltage converting circuit includes a high-frequency buck switching regulator chip U13 (e.g., chip MP 2451) and its peripheral circuits, and the third voltage converting circuit includes a low-voltage regulator chip U4 (e.g., chip BL8565CC3BTR33/HT 7833) and its peripheral circuits; the power input end of the DC-DC buck chip U11 is externally connected with a 55V direct current voltage, the output end Lx thereof is connected to the input end VIN of the high-frequency buck switching regulator chip U13 through the second inductor L2, the output end SW of the high-frequency buck switching regulator chip U13 is connected to the input end VIN of the low-voltage regulator chip U4 through the fifth inductor L5, and the output end VO of the low-voltage regulator chip U4 outputs a 3.3V stable direct current voltage. Specifically, referring to fig. 13a, the IN pin (for power on) of the buck chip U11: 1) an external power supply VIN, 2) the external power supply VIN is connected with an EN pin (namely an enable pin) through a twelfth resistor R12 (the EN pin is also grounded through a thirteenth resistor R13), 3) the external power supply VIN is grounded through a fourteenth capacitor C14 and an input filter capacitor C12, and 4) the external power supply VIN is connected with a RON pin through the fourteenth resistor R14; lx pin of the buck chip U11 (for inputting switch signal): the output end outputs 12V stable direct current voltage through the connection of a second inductor L2, a first node between the remaining output ends of the second inductor L2 is grounded through a serial branch of fifteenth and sixteenth resistors R15 and R16, the fifteenth resistor R15 is also connected with a sixteenth capacitor C16 in parallel, and a parallel node of the fifteenth resistor R15 and the sixteenth capacitor C16 is connected to an FB pin of a chip U11; a second node between the second inductor L2 and the output end is grounded through a twenty-second capacitor C22, the second node is grounded through a twenty-third capacitor C23, and the output end is grounded through a fifty-eighth capacitor C58; VCC pin of this step-down chip U11: grounded through a twenty-seventh capacitor C27 and connected to the anode of the twenty-second capacitor through a third diode D3. Specifically, referring to fig. 12, the VIN pin of the high-frequency buck switching regulator chip U13: 1) an output terminal connected to the first voltage conversion module, 2) a ground through a fifty-sixth capacitor C56, 3) an EN pin connected to the chip U13 through a fifty-sixth resistor R50; the BST pin of the high-frequency buck switching regulator chip U13 is connected to the SW pin of the chip U13 through a fifty-third capacitor C53; SW pin of high frequency buck switching regulator chip U13: 1) Grounded through a fourth diode D4, 2) connected to the output (3.6V) through a fifth inductance L5, and the fifth inductance L5 is connected to the FB pin through a fifty-first resistor R51, the FB pin is grounded through a forty-ninth resistor R49, and the FB pin is also connected to a first node between the fifth inductance L5 and the output through a fifty-seventh capacitor C57, a second node between the remaining outputs of the fifth inductance L5 is grounded through a fifty-fourth capacitor C54, and the output is grounded through a forty-third capacitor C43. Specifically, referring to fig. 12, the VIN pin of the low-voltage regulator chip U4 is connected to the output terminal (3.6V) of the second voltage conversion module, the VO pin is connected to the output terminal (DVCC) of the third voltage conversion module, and the output terminal is grounded through a twenty-fourth capacitor C24, and the twenty-fourth capacitor C24 is connected in parallel with eighth, seventh, thirty-first, thirty-second capacitors C8, C7, C31, and C32.

In some embodiments, the five primary LED module comprises: a white light-emitting branch, a yellow light-emitting branch, a red light-emitting branch, a green light-emitting branch and a blue light-emitting branch which are connected in parallel.

In some embodiments, each primary color LED in the five primary color LED module adopts a series-parallel manner. Specifically, referring to fig. 9a, the green light emitting branch includes two green LEDs connected in series, the blue light emitting branch includes two blue LEDs connected in series, the red light emitting branch includes two red LEDs connected in series, the yellow light emitting branch includes at least two yellow LED combinations connected in series, each yellow LED combination includes two yellow LEDs connected in parallel, the white light emitting branch includes at least two white LED combinations connected in series, each white LED combination includes six white LEDs connected in parallel, and the distribution of the respective LEDs on the substrate is as described in the first embodiment, such as any one of fig. 2 a-2 d.

In some embodiments, referring to fig. 10a, the LED driving module includes: the driving circuit comprises a first driving chip U7, a first switch controller, a second driving chip U6, a second switch controller and peripheral circuits corresponding to the driving chips. Specifically, the power supply terminal VCC of the first driving chip U7 is electrically connected to the output terminal of the first voltage conversion circuit to be connected to a 12V dc power supply (and the output terminal of the first voltage conversion circuit is also grounded through a forty-second capacitor C42), two input terminals INA and INB thereof are respectively electrically connected to the main control module to receive a yellow light control signal crtl_y and a white light control signal crtl_r output by the main control module, and then independently adjust the current i_y flowing through the yellow light emitting branch (e.g. each group of yellow LEDs connected in parallel in fig. 9 a) according to the yellow light control signal crtl_r (in the case of the total current I being unchanged), and independently adjust the current i_r flowing through the red light emitting branch (e.g. two red LEDs connected in series in fig. 9 a), and two output terminals OUTA and OUTB are respectively connected to the gate electrode (i.e. the gate electrode) of the first field effect transistor N1 serving as the first switch controller and the gate electrode (i.e. the gate electrode) of the second switch controller. Wherein, the D pole (drain electrode) of the first field effect transistor N1: 1) The fourth inductor L4 is connected to (the negative end of) the yellow light-emitting branch, and a node between the fourth inductor L4 and the yellow light-emitting branch is externally connected with a power supply VIN through a fifth capacitor C5; 2) Externally connecting a power supply VIN through a second diode D2; the S pole (source) is grounded. Wherein, the D pole (drain electrode) of the second field effect transistor N2: 1) The first inductor L1 is connected to (the negative end of) the red light-emitting branch, and a node between the first inductor L1 and the red light-emitting branch is externally connected with a power supply VIN through a tenth capacitor C10; 2) Externally connecting a power supply VIN through a sixth diode D6; the S pole (source) is grounded. Further, a third fuse F3 is disposed between the node between the first inductor L1 and the red light emitting branch for protection.

In some embodiments, the power supply terminal VCC of the second driving chip U6 is electrically connected to the output terminal of the first voltage conversion circuit (and the output terminal of the first voltage conversion circuit is also grounded through the forty-two capacitor C42) to be connected to a 12V dc power supply, two input pins INA and INB thereof are respectively connected to be electrically connected to the main control module to receive the green control signal crtl_g and the total current adjustment signal crtl_pwm output by the main control module, so that the second driving chip U6 independently adjusts the current i_g flowing through the green light emitting branch (such as the two green LEDs connected in series in fig. 9 a) according to the green control signal crtl_g, (in case that the total current I is unchanged), and adjusts the total current I (i=i_w+i_r+i_b+i_g) according to the total current control signal crtl_pwm, and two output terminals OUTA thereof are respectively connected to the third field effect transistor N3 serving as the third switch controller and the fourth field effect transistor N (i.e. the fourth switch controller N4); wherein, the D pole (drain electrode) of the third field effect transistor N3: 1) The third inductor L6 is connected to the green light emitting branch circuit through a third inductor L6, and the third inductor L6 is externally connected with a power supply through a third capacitor C6; 2) Externally connecting a power supply through a first diode D1; the S electrode (source electrode) is grounded; further, a second fuse F2 is arranged between the sixth inductor L6 and the green light emitting branch for protection; wherein, the D pole (drain electrode) of the fourth field effect transistor N4: 1) The first inductor L1 is connected to the blue light-emitting branch through a tenth capacitor C10 to be externally connected with a power supply; 2) Externally connecting a power supply through a fifth diode D5; the S electrode (source electrode) is grounded; further, a first fuse F1 is also provided between the third inductance L3 and the blue light emitting branch for protection.

Therefore, the first, second, third and fourth switch controllers are respectively used as control switches of the yellow, red, green and blue light-emitting branches, that is, the main control module can respectively control the first, second, third and fourth switch controllers to control the on or off of the corresponding light-emitting branches. In some embodiments, the first, second, third and fourth switch controllers all employ enhancement mode field effect transistors. Of course, in other embodiments, the first, second, third, and fourth switch controllers may be implemented by other components, such as transistors.

In some embodiments, the dimming module comprises: analog-to-digital converter chip U3 and its peripheral circuitry. Specifically, referring to fig. 11, the reference voltage input terminal VREF of the analog-to-digital converter chip U3 (e.g., the chip MCP 4716) is connected to the output terminal of the third voltage conversion circuit (e.g., the 3.3V output terminal of the low voltage regulator chip U4) through a twenty-sixth resistor R26; the SCL pin and the SDA pin are respectively connected to the main control module to receive the DA_SCL control signal and the DA_SDA control signal output by the main control module, and are respectively connected to the output end of the third voltage conversion circuit (for example, the 3.3V output end of the low-voltage regulator chip U4) through seventh and third resistors R7 and R3; the output end VOUT is electrically connected with the positive electrode input end of the first operational amplifier U2A, and the output pin VOUT is grounded through a second capacitor C2; the pin VSS is grounded, and the pin VDD is connected to an output terminal of a third voltage converting circuit (for example, a 3.3V output terminal of the low voltage regulator chip U4), and the output terminal of the third circuit converting circuit is also grounded through an eleventh capacitor C11. The output end of the first operational amplifier U2A is electrically connected with the positive input end of the second operational amplifier U2B and the negative input end of the first operational amplifier U2A respectively; the power input end of the second operational amplifier U2B is connected to the output end of the first voltage conversion circuit so as to be connected with 12V direct current voltage, and the output end of the second operational amplifier U2B is provided with the output end: 1) The negative electrode input end is connected to the negative electrode input end through a ninth resistor R9, and the negative electrode input end is grounded through an eighth resistor R8; 2) The main control module is connected to the first resistor R2; the node between the second resistor R2 and the output terminal of the second op-amp U2B is connected between two seventh diodes D7 connected in series to the output terminal of the first voltage conversion circuit. In some embodiments, the dimming module is configured to output a voltage of 0-10V to regulate the power of the street lamp, thereby adjusting the brightness of the street lamp. Specifically, when a user inputs a target brightness value into the main control chip U1 through a user terminal, such as a mobile terminal (e.g., a mobile phone) and the internet of things (e.g., through a wireless communication module, such as a wireless communication chip P4 electrically connected to the main control chip U1 and a peripheral circuit thereof in fig. 14), the main control chip sends a corresponding control signal to the analog-to-digital converter chip U3 of the dimming module, so that the dimming circuit outputs a corresponding voltage value to adjust the brightness of the street lamp. For example, the total power of the street lamp is 100W, because the five primary color branches are connected in parallel, wherein the powers of the red, green and blue primary color branches are respectively 10W, and the powers of the white and yellow primary color branches are respectively 35W, which correspond to the first brightness value, when a user inputs a target brightness value in the main control module, the main control module performs dimming through the dimming module, so that the powers of the five primary color light emitting branches are halved, for example, the powers of the red, green and blue primary color branches are respectively 5W, and the powers of the white and yellow primary color branches are respectively 17.5W, so that the light of each primary color light emitting unit reaches the target brightness after light mixing.

In some embodiments, referring to fig. 14, the master control module specifically includes; the main control chip U1 and the peripheral circuit thereof, wherein the power input end VCC of the main control chip U1 is connected to the output end of the third voltage conversion circuit through the fourth resistor R4 to be connected with 3.3V direct current voltage, and the first, second, third and fourth output ends are respectively connected to the two input ends INA and INB of the first driving chip U7 and the two input ends INA and INB of the second driving chip U6.

In some embodiments, the modules can be connected by adopting an RS485 bus connection mode. Specifically, the VCC pin of the main control chip U1 is connected to the output end (3.3V) of the third voltage conversion circuit through a fourth resistor R4, and a first node between the fourth resistor R4 and the VCC pin is grounded through a thirty-third capacitor C33; the first output pin of the main control chip U1 is connected to the INA pin of the first driving chip U7 in the LED driving module, and is used for providing a yellow light control signal CRTL_Y for the first driving chip U7; the second output pin of the main control chip U1 is connected to the INB pin of the first driving chip U7 in the LED driving module and is used for providing a red light control signal CRTL_R for the first driving chip U7; the third output pin of the main control chip U1 is connected to the INA pin of the second driving chip U6 in the LED driving module, and is used for providing a green light control signal CRTL_G for the second driving chip U6; the fourth output pin of the main control chip U1 is connected to the INB pin of the second driving chip U6 in the LED driving module, and is used for providing a total current adjusting control signal CRTL_PWM for the second driving chip U6; the fifth and sixth output pins of the main control chip U1 are connected with the SCL pin and the SDA pin of the analog-digital converter chip U3 in a subsection manner.

In some embodiments, when a user inputs a target color temperature into the main control chip U1 through a user terminal, such as a mobile terminal (e.g., a mobile phone) and the internet of things (e.g., through a wireless communication module, such as a wireless communication chip P4 electrically connected to the main control chip U1 and its peripheral circuits in fig. 14), the main control chip U1 sends corresponding control signals to the first driving chip U7 (e.g., the chip TC4427A/EG 27324) and the second driving chip U6 (e.g., the chip TC4427A/EG 27324), respectively, so that the current flowing through the corresponding primary color light emitting branch in the five primary color LED module becomes 0 or is not 0 (e.g., increases or decreases). For example, when the target color temperature is 3000K, the main control chip U1 may send corresponding control signals crtl_ Y, CRTL _ R, CRTL _g to the first driving chip U7 and the second driving chip U6, respectively, so that the sum of the currents flowing through the white light emitting branch and the yellow light emitting branch is I and the currents flowing through the red light emitting branch, the green light emitting branch and the blue light emitting branch are 0 on the premise that the total current I is unchanged. Or when the user has another target color temperature (the target color temperature is greater than 3000K and less than 5000K), the main control chip U1 may send corresponding control signals crtl_ Y, CRTL _ R, CRTL _g to the first driving chip U7 and the second driving chip U6, respectively, so that the total current flowing through the white light emitting branch, the yellow light emitting branch, the red light emitting branch, the green light emitting branch and the blue light emitting branch is I under the premise of unchanged total current I. That is, the color of the light source, that is, the constant current is adjusted to perform multicolor temperature adjustment by controlling the current flowing through each primary color light emitting branch. For example, electrodeless dimming from 3000K to 5000K. Similarly, when a user inputs a target brightness into the main control chip U1 through the user terminal, the main control chip U1 sends a corresponding control signal to the analog-to-digital converter chip to adjust the output voltage, and accordingly, the current flowing through the corresponding primary color light emitting branch in the five primary color LED module also changes adaptively.

Of course, in other embodiments, when the user inputs the target brightness, the main control chip U1 may also send corresponding control signals crtl_ Y, CRTL _ R, CRTL _g to the first driving chip U7 and the second driving chip U6, respectively, so as to adjust the current flowing through the white light emitting branch, the yellow light emitting branch, the red light emitting branch, the green light emitting branch and the blue light emitting branch on the premise that the total current I is unchanged, that is, realize constant current brightness adjustment. Alternatively, the main control chip U1 may send the total current control signal crtl_pwm to the second driving chip U6, so that the second driving chip U6 adjusts the total current to adjust the brightness of the light source. When the light source is required to emit full spectrum white light, the LED driving module works, and the main control module controls the current flowing through any primary color light emitting branch to be different from 0 through the first driving chip U7 and the second driving chip U6, so that full spectrum white light is obtained.

In other embodiments, the main control chip may further receive a control instruction sent by the user through the wireless communication chip P4 and feedback the heartbeat packet to the user, so as to realize "single-lamp sensing", for example, if any branch fails, the main control chip cannot feedback the heartbeat packet, so that the user knows that the failure occurs.

In some embodiments, the main control chip U1 adopts an existing single chip (for example, GW32LC256LQ 64), and downloads and stores a corresponding dimming scheme/dimming algorithm in advance, that is, only a user needs to input a corresponding target color temperature or target brightness, the single chip can obtain the current or total current corresponding to each primary color light emitting branch corresponding to the target color temperature/target brightness, and generate a corresponding control signal. Of course, the user may also input each dimming parameter (for example, perform data communication with the singlechip through the internet of things to input the dimming parameter, or directly input the dimming parameter in an input unit of the singlechip, such as a touch screen, a keyboard, or a key), for example, color temperature, brightness value, and the like, and then the singlechip controls the on (i.e., current flowing through the single-color light emitting branch is not 0) or off (i.e., current flowing through the single-color light emitting branch is 0) and brightness (i.e., current flowing through the single-color light emitting branch) of each single-color light emitting branch according to each input dimming parameter. In particular, for the urban road traffic management system, the singlechip can perform data communication with the urban road traffic management system through the Internet of things, so that the urban road traffic management system can be managed in a centralized manner, and the light sources of corresponding road sections can be adjusted or controlled remotely according to specific conditions of different traffic road sections.

In some embodiments, the full-spectrum multi-color temperature light source can be regulated and controlled through the internet of things according to different urban traffic road sections.

In other embodiments, the full spectrum multi-color temperature light source further comprises: the image acquisition module is used for acquiring the surrounding image of the road section corresponding to the full-spectrum multi-color temperature light source and is electrically connected (such as wireless connection or wired connection) with the main control module. Specifically, the image acquisition module may employ a high-definition image pickup apparatus.

Correspondingly, the main control module is also used for carrying out image recognition on the image acquired by the image acquisition module to obtain the type of the surrounding environment of the road section, such as ancient architecture, colored flowers, green plants, artistic drawings, or more blue indication boards, so that corresponding driving chips are driven according to a preset dimming strategy, and the on/off of each light emitting branch in the full-spectrum multi-color temperature light source or the current value is automatically adjusted to adjust the reserved proportion of each primary color independent spectrum in the full-spectrum white light.

For example, referring to fig. 8, when the main control module recognizes that the road surrounding environment corresponding to the full-spectrum multi-color temperature light source is an ancient building, on the premise that the total current I is unchanged, the green light emitting branch and the blue light emitting branch can be controlled to be turned off, so that the current of the yellow light emitting branch is increased. Specifically, the main control module controls the currents flowing through the green light-emitting branch and the blue light-emitting branch to be 0 through the first driving chip and the second driving chip, and the sum of the currents of the white light-emitting branch, the yellow light-emitting branch and the red light-emitting branch is I.

For example, when the main control module recognizes that the road surrounding environment corresponding to the full-spectrum multi-color temperature light source is planted with more red flowers, the yellow light-emitting branch is controlled to be closed and the current of the red light-emitting branch is increased under the premise that the total current I is unchanged. Specifically, the main control module controls the current flowing through the yellow light emitting branch to be 0 through the first driving chip and the second driving chip, and the sum of the currents of the other four primary color branches is I.

For example, when the main control module recognizes that the road section surrounding environment corresponding to the full-spectrum multi-color temperature light source is planted with more green plants, the yellow light-emitting branch is controlled to be closed, and the current of the green light-emitting branch is increased.

For example, when the main control module recognizes that the road section surrounding environment corresponding to the full-spectrum multi-color temperature light source is provided with more road sign indication boards or other blue indication boards, the yellow light-emitting branch is controlled to be closed, and the current of the blue light-emitting branch is increased.

Taking a full spectrum multi-color temperature light source shown in fig. 1a as an example, a 180W lamp is constructed, and aiming at different traffic road sections, the light source module in the lamp is regulated and controlled:

for example, in order to improve the color reduction degree of the ancient architecture or the pseudo-architecture, the green light-emitting branch and the blue light-emitting branch can be controlled to be closed, and the current of the yellow light-emitting branch can be increased. The spectral duty cycle distribution table shown in fig. 8 was obtained by the test: the independent spectrum of white light accounts for 80.56%, the independent spectrum of red light accounts for 2.78%, and the independent spectrum of yellow light accounts for 16.67%.

For example, in the case that more red flowers are planted on both sides of the road, in order to increase the color rendition of the red flowers, the yellow light emitting branch can be controlled to be turned off, and the current of the red light emitting branch can be increased. The spectral duty cycle distribution table shown in fig. 8 was obtained by the test: the independent spectrum of the white light accounts for 87.78%, the independent spectrum of the red light accounts for 4.44%, and the independent spectrum of the green light accounts for 1.11%; the independent spectrum of blue light is 1.11%.

For example, in the case that more green plants are planted on both sides of the road, in order to improve the color reproducibility of the green plants, the yellow light emitting branch can be controlled to be turned off, and the current of the green light emitting branch can be increased. The spectral duty cycle distribution table shown in fig. 8 was obtained by the test: the independent spectrum of the white light accounts for 92.22%, the independent spectrum of the red light accounts for 0.56%, and the independent spectrum of the green light accounts for 4.44%; the independent spectrum of blue light is 2.78%.

For example, in the case that more road sign signs or other blue signs are arranged on two sides of a road, in order to improve the color rendition degree of the blue sign, the yellow light-emitting branch can be controlled to be turned off, and the current of the blue light-emitting branch can be increased. The spectral duty cycle distribution table shown in fig. 8 was obtained by the test: the independent spectrum of the white light accounts for 92.22%, the independent spectrum of the red light accounts for 0.56%, and the independent spectrum of the green light accounts for 2.78%; the independent spectrum of blue light is 4.44%.

Embodiment III: the invention also provides another full spectrum multi-color temperature light source, which comprises each module in the second embodiment, and comprises: the base plate, integrated on the base plate power module, five primary colors LED module, LED drive module and main control module, the module of adjusting luminance, wherein, this power module, main control module are the same with power module, main control module in the above-mentioned embodiment II, and its theory of operation is the same.

In some embodiments, referring to fig. 9b, the five-primary LED module includes one of the five-primary LED modules in the second embodiment described above: the difference is that in this embodiment, the white light emitting branch is formed by connecting a plurality of groups of white light emitting units in parallel in series, the yellow light emitting branch is formed by connecting a plurality of groups of yellow light emitting units in parallel in series, and the red light emitting branch is formed by connecting a plurality of red light emitting units in series, and the white light emitting branch, the yellow light emitting branch, the red light emitting branch and the green and blue light emitting branch are connected in parallel.

In some embodiments, referring to fig. 10b, the led driving module specifically includes: the driving circuit comprises a first driving chip U7, a first switch controller, a third driving chip U8, a second switch controller, a fourth driving chip U9, a third switch controller and peripheral circuits corresponding to the driving chips. Specifically, a pin VCC of the first driving chip U7 is electrically connected to an output terminal of the first voltage conversion circuit, so as to be connected to a 12V dc power supply; one input pin INB is electrically connected with the main control module to receive a yellow light control signal CRTL-Y output by the main control module; one output pin OUTB is connected to the G pole (i.e., the control end) of the first fet N1 as the first switch controller, while the D pole (drain) of the first fet N1 is connected to the yellow light emitting branch, and the S pole (source) is grounded. Specifically, pin VDD of the third driving chip U8 (e.g., chip H5119L) is connected to the output end of the first voltage conversion circuit through a ninety resistor R90 to access a 12V dc power supply; the GATE is connected to the G pole (i.e. the control terminal) of the second fet N2 as the second switch controller, and the D poles (drains) of the second fet N2 are respectively: 1) An external power supply is connected to the second eleventh diode D21, and 2) the second power supply is connected to the green light-emitting branch and the blue light-emitting branch through a fourth inductor L4; the S electrode (source electrode) is grounded; the pin PWM of the third driving chip U8 is electrically connected with the main control module through a ninety-eighth resistor R98 so as to receive a total current regulation control signal CTRL-PWM output by the main control module. Specifically, pin VDD of the fourth driving chip U9 is connected to the output end of the first voltage conversion circuit through a ninety-five resistor R95 to be connected to a 12V dc power supply; the GATE is connected to the G pole (i.e. the control terminal) of the third fet N3 as the third switch controller, and the D poles (drains) of the third fet N3 are respectively: 1) An external power supply is connected to the red light-emitting branch through a twenty-second diode D22, and 2) the red light-emitting branch is connected to the twenty-second diode D22 through a third inductor L3; the S electrode (source electrode) is grounded; the pin PWM of the fourth driving chip U9 is electrically connected with the main control module through a ninety-ninth resistor R99 so as to receive a red light control signal CTRL-R output by the main control module.

In some embodiments, the third and fourth driving chips are LED constant current drivers, and in particular, for example, chip H5119 may be used.

Further, the pin CS of the third driving chip U8 is grounded through feedback resistors R83 and R84 connected in parallel, and a node between the feedback resistor R84 and the pin CS is further connected to the emitter of the field effect transistor N3. After the third driving chip U8 adjusts the current according to the control signal (including the target current value) of the main control chip, the adjusted current value is collected through the feedback resistor and compared with the target current value to judge whether the current value reaches the target current value, if the current value does not reach the target current value, the third driving chip U8 continues to adjust, otherwise, the current is not adjusted any more. Similarly, the pin CS of the fourth driving chip U9 is grounded through parallel feedback resistors R85 and R86, and a node between the feedback resistor R86 and the pin CS is further connected to the emitter of the fet N2. That is, unlike the driving chip in the second embodiment, which adopts the open-loop adjustment mode, in this embodiment, a closed-loop constant-current adjustment mode is adopted, so that a large current is prevented from flowing through the red, green and blue three-primary-color light emitting branches.

In some embodiments, referring to fig. 11b, the dimming module specifically comprises: the fourth switch controller, the second resistor R2, the zener diode Z3 and the twelfth socket CON12. Specifically, the base electrode of the triode D7 serving as the fourth switch controller is electrically connected with the main control module through an eighth resistor R8 so as to receive a CRTL-R control signal output by the main control module, the emitter electrode is grounded, and the collector electrodes are respectively: 1) The first voltage conversion circuit is electrically connected with the second voltage conversion circuit through a ninth resistor so as to be connected with 12V direct-current voltage; 2) Grounding through a zener diode Z3; 3) Is connected to a twelfth row of inserts CON12 through a second resistor R2; and the twelfth row of plugs CON12 has a first pin grounded, a second pin connected to the white light emitting branch, third to fifth pins externally connected to a power supply, and sixth to eighth pins respectively connected to the yellow light emitting branch, the red light emitting branch, the green light emitting branch and the blue light emitting branch.

In some embodiments, referring to fig. 13b, the first voltage conversion module specifically includes: a DC-DC voltage reducing chip U11 and peripheral circuits thereof. Specifically, the peripheral circuit of the DC-DC buck chip U11 (for example, SY8501 chip) is different from that of the buck chip U11 in the above-described second embodiment in that: 1) The IN pin is externally connected with a power supply through an eighth diode D8; 2) A twenty-third capacitor C23 is not arranged between the output terminal and the second node between the second inductor L2 and the output terminal.

In some embodiments, when the user inputs the target color temperature in the main control chip U1, the main control chip U1 sends corresponding control signals to the first driving chip U7, the third driving chip U8, and the fourth driving chip U9, respectively, so that the corresponding primary color light emitting branch in the five primary color LED module is turned off (i.e., the current flowing through the primary color light emitting branch is 0) or turned on (i.e., the current flowing through the primary color light emitting branch is not 0). Or, the main control chip U1 sends a corresponding total current adjustment control signal crtl_pwm to the fourth driving chip U9, so that the fourth driving chip U9 outputs the target current. Because the four branches adopt a parallel connection mode, the target current i=i_r+i_w+i_gb+i_y.

In some embodiments, when the user inputs the target brightness value in the main control chip U1, the main control chip U1 sends a corresponding control signal to the dimming module to adjust the output voltage, thereby realizing adjustment of the brightness value.

The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.

Claims

1. The utility model provides a red green blue yellow white LED light mixing technique makes five primary colors full spectrum polychromatic temperature light source, five primary colors full spectrum polychromatic temperature light source includes the base plate, its characterized in that still includes: two single-basic-color light emitting units on the central axis in the width direction of the substrate and multiple-basic-color light emitting unit matrixes respectively arranged on two sides of the central axis in the width direction of the substrate, wherein each column of the multiple-basic-color light emitting unit matrixes comprises two single-basic-color light emitting units of two basic colors, each single-basic-color light emitting unit is any one of white, green, yellow, blue and red, and any two basic-color light emitting units of red, blue and green are not adjacent; wherein, each single-basic-color light-emitting unit is correspondingly provided with a lens; wherein, the interval between two adjacent single-base color luminous units in each column of the multi-base color luminous unit matrix is 10mm-15mm; the interval between two adjacent columns in the multi-primary color luminous element matrix is 24mm-31.6mm;

the thickness between the emergent surface and the incident surface is gradually increased from one side to the other side along the Y-axis direction, so that an emergent angle formed by emergent light rays along the Y-axis direction after the emergent light rays are emergent from the emergent surface is 45-65 degrees, and the deflection angle of the emergent light rays is 10-15 degrees; wherein the Y-axis direction is the substrate width direction; the thickness between the emergent surface and the incident surface is gradually increased from the central area to two sides extending along the X axis, so that an emergent angle formed by emergent light rays along the X axis direction after the emergent light rays are emergent from the emergent surface is 150-162 degrees; wherein the X-axis direction is the length direction of the substrate; the central area is an area extending in the Y-axis direction from the central axis CA of the lens between the incident surface and the exit surface.

2. The method of claim 1, wherein at least one single-primary color light emitting element of different primary colors is arranged between two adjacent columns of the matrix of multi-primary color light emitting elements.

3. The method of claim 2, wherein a row of the matrix of multi-primary color light emitting elements near the central axis has at least one single-primary color light emitting element of a different primary color from two single-primary color light emitting elements on the central axis.

4. The method of claim 1, wherein a column of the matrix of multi-primary light emitting elements furthest from the central axis has at least one single-primary light emitting element of a different primary color from two single-primary light emitting elements located on the central axis.

5. The method of claim 1, wherein at least two single-primary color light-emitting elements of different primary colors are arranged between a column of the two multi-primary color light-emitting element matrices furthest from the central axis.

6. The method of claim 1, wherein the white light emitting elements in each column of the matrix of multi-primary light emitting elements have a ratio of 40% -80%.

7. The method for manufacturing the five-primary-color full-spectrum multi-color temperature light source by using the red, green, blue, yellow and white LED light mixing technology according to claim 1, wherein the incidence surface is pretreated, so that microstructures are uniformly distributed on the surface of the incidence surface.

8. The method of claim 1, wherein the two single-color light emitting units located in the central axis direction are white light emitting units and yellow L light emitting units, respectively.