Light source

Abstract

The invention discloses a light source which comprises a driving substrate and a light-emitting unit group, the light-emitting unit group comprises at least two groups of light-emitting units, and each light-emitting unit comprises a plurality of light-emitting elements; the light-emitting unit group comprises an ith group of light-emitting units and a jth group of light-emitting units, the jth group of light-emitting units surrounds at least part of the ith group of light-emitting units, and the ith group of light-emitting units and the jth group of light-emitting units are independently and electrically connected with the driving substrate respectively; the light source further comprises a light-emitting adjusting structure located on the light-emitting side of the light-emitting unit set, the distance between the i-th light-emitting unit set and the light-emitting adjusting structure is constant, the distance between the j-th light-emitting unit set and the light-emitting adjusting structure is constant, and the light-emitting angle of the j-th light-emitting unit set is larger than that of the i-th light-emitting unit set. By the adoption of the technical scheme, the same light source can emit multiple different light-emitting angles by using the same light-emitting adjusting structure in a fixed space structure, the design cost and the production cost of the light source are reduced, and the requirement for miniaturization of the light source is met.

Description

Technical Field

[0001] This invention relates to the field of light source manufacturing technology, and more particularly to a light source. Background Technology

[0002] With the development and increasing maturity of LED (Light Emitting Diode) technology, LED light sources have gradually replaced traditional light sources and become the new generation of artificial light sources, and are being used more and more widely in lighting products.

[0003] For different lighting applications, finished lighting products need to be designed to have different light emission angles. Currently, there are two technical solutions to achieve this. One involves selecting a specific LED light source model and designing a matching optical device for each model. The relative position of the optical device and the LED light source remains fixed, and different optical devices are used to control the corresponding light emission angle. The other involves selecting a specific LED light source and designing a matching optical device. By adjusting the relative position of the optical device and the LED light source, different light emission angles can be achieved on the same finished product.

[0004] However, the first technical solution requires the separate design, development, and manufacturing of optical devices for each product to accommodate multiple emission angles, increasing both design and manufacturing costs. The second technical solution, while enabling the output of multiple emission angles on the same product by adjusting the relative position of the optical devices and the LED light source, requires a large product size due to the need for ample space and the complex mechanical structure for adjusting the position, making it unsuitable for miniaturization. Summary of the Invention

[0005] This invention provides a light source that, by using the same light-emitting adjustment structure within a fixed spatial structure and through independent driving control of the light-emitting units, achieves the effect of emitting light from multiple different angles, thereby reducing the design, development, and manufacturing costs of the light source and decreasing its size.

[0006] This invention provides a light source, which includes a driving substrate and a light-emitting unit group. The light-emitting unit group includes at least two groups of light-emitting units, and each light-emitting unit includes multiple light-emitting elements. The light-emitting unit group includes an i-th group of light-emitting units and a j-th group of light-emitting units, the j-th group of light-emitting units surrounds at least a portion of the i-th group of light-emitting units, and the i-th group of light-emitting units and the j-th group of light-emitting units are independently electrically connected to the driving substrate; where i and j are both positive integers; The light source also includes a light emission adjustment structure located on the light emission side of the light emission unit group. The distance between the i-th group of light emission units and the light emission adjustment structure is constant, the distance between the j-th group of light emission units and the light emission adjustment structure is constant, and the light emission angle of the j-th group of light emission units is greater than that of the i-th group of light emission units.

[0007] Optionally, the emission angle of the i-th group of light-emitting units is The emission angle of the j-th group of light-emitting units is ; The maximum distance between the area where the i-th group of light-emitting units is set and the center of the group of light-emitting units is L. i The maximum distance between the setting area of ​​the j-th group of light-emitting units and the center of the light-emitting unit group is L. j ; in, , where a is a positive number.

[0008] Optionally, along the optical axis of the light source, the distance between the i-th group of light-emitting units and the light-emitting adjustment structure is the same as the distance between the j-th group of light-emitting units and the light-emitting adjustment structure.

[0009] Optionally, the driving voltage of the i-th group of light-emitting units is U i The driving voltage of the j-th group of light-emitting units is U j ; in, .

[0010] Optionally, the light-emitting unit group may also include the p-th group of light-emitting units; p is a positive integer; Multiple light-emitting elements in the p-th group of light-emitting units are connected in parallel.

[0011] Optionally, the light-emitting unit group also includes the q-th group of light-emitting units; q is a positive integer; The qth group of light-emitting units includes at least one light-emitting sub-unit, and the light-emitting sub-unit includes multiple light-emitting elements; Multiple light-emitting elements in the same light-emitting subunit are connected in series; When the qth group of light-emitting units includes at least two light-emitting sub-units, any two light-emitting sub-units are connected in parallel.

[0012] Optionally, the substrate includes an electrical pad assembly; The light-emitting element includes a first electrode and a second electrode; The electrical pad group includes multiple electrical pad units, and each electrical pad unit includes a first electrode pad and a second electrode pad; at least one first electrode in the light-emitting unit is electrically connected to the first electrode pad, and at least one second electrode is electrically connected to the second electrode pad; Alternatively, the electrical pad group includes a common first electrode pad and a plurality of second electrode pads; at least one first electrode in any light-emitting unit is electrically connected to the common first electrode pad, and at least one second electrode in each light-emitting unit is electrically connected to the second electrode pad.

[0013] Optionally, the light-emitting element includes a light-emitting chip and a fluorescent film, wherein the fluorescent film is located on the light-emitting side of the light-emitting chip.

[0014] Optionally, the light source further includes a light-emitting gap located between two adjacent groups of light-emitting units; Along the radial direction, the width d of the light-emitting gap satisfies d < 0.15 mm.

[0015] Optionally, the light-emitting unit may also include the m-th group of light-emitting units and the n-th group of light-emitting units, wherein the color temperature and / or color of the light-emitting elements in the m-th group of light-emitting units and the n-th group of light-emitting units are different; m and n are both positive integers.

[0016] The light source provided in this embodiment of the invention includes an i-th group of light-emitting units and a j-th group of light-emitting units. The j-th group of light-emitting units surrounds at least a portion of the i-th group of light-emitting units, and both the i-th and j-th groups of light-emitting units are independently electrically connected to a driving substrate. Furthermore, the emission angle of the j-th group of light-emitting units is greater than that of the i-th group. Further, the light source also includes a light-emitting adjustment structure located on the light-emitting side of the light-emitting unit group. The distance between the i-th group of light-emitting units and the light-emitting adjustment structure is constant, as is the distance between the j-th group of light-emitting units and the light-emitting adjustment structure. By employing this scheme, multiple light-emitting units are independently controlled in an encircling arrangement, maintaining a constant distance between the light-emitting adjustment structure and different light-emitting units. This allows the same light-emitting adjustment structure to emit multiple different emission angles from the same light source within a fixed spatial structure, reducing the design, development, and manufacturing costs of the light source, and decreasing its size. This solves the problems of separately designing, developing, and manufacturing optical devices corresponding to multiple emission angles, which increases design, development, and manufacturing costs, and the problems of large light source size and complex mechanical structures for adjusting the light source position. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a light source provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the light emission angle of a light source provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of another light source provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the light emission angle of another light source provided in an embodiment of the present invention; Figure 5This is a schematic diagram of the light emission angle of another light source provided in an embodiment of the present invention.

[0018] In this embodiment of the invention, the reference numerals and corresponding feature names are as follows: 10 - Light-emitting unit group, 11 - Group i of light-emitting units, 12 - Group j of light-emitting units, 13 - Group p of light-emitting units, 14 - Group q of light-emitting units, 15 - Group m of light-emitting units, 16 - Group n of light-emitting units, 20 - Light emission adjustment structure, 30 - Electrical pad unit, 31 - First electrode pad, 32 - Second electrode pad, 40 - Electrical pad group, 41 - Common first electrode pad, 50 - Light emission gap, 100 - Driving substrate. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0020] The terminology used in the embodiments of this invention is for the purpose of describing specific embodiments only and is not intended to limit the invention. It should be noted that directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this invention are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this invention. Furthermore, in the context, it should be understood that when referring to an element being formed "upper" or "lower" of another element, it can be formed not only directly "upper" or "lower" of the other element, but also indirectly "upper" or "lower" of the other element through an intermediate element. The terms "first," "second," etc., are used for descriptive purposes only and do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0022] Figure 1 This is a schematic diagram of the structure of a light source provided in an embodiment of the present invention. Figure 2This is a schematic diagram of the light emission angle of a light source provided in an embodiment of the present invention, specifically a schematic diagram of the light emission angle of the i-th group of light-emitting units. Figure 3 This is a schematic diagram of another light source provided in an embodiment of the present invention. Figure 4 This is a schematic diagram of the light emission angle of another light source provided in an embodiment of the present invention, specifically a schematic diagram of the light emission angle of the j-th group of light-emitting elements. This light source is suitable for situations where the same optical device is used within a fixed spatial structure to emit multiple different light emission angles from the same light source. Figures 1-4 As shown, the light source includes a driving substrate 100 and a light-emitting unit group 10. The light-emitting unit group 10 includes at least two groups of light-emitting units, and each light-emitting unit includes multiple light-emitting elements (not shown in the figure). The light-emitting unit group 10 includes an i-th group of light-emitting units 11 and a j-th group of light-emitting units 12. The j-th group of light-emitting units 12 surrounds at least a portion of the i-th group of light-emitting units 11, and the i-th group of light-emitting units 11 and the j-th group of light-emitting units 12 are independently electrically connected to the driving substrate 100. Here, i and j are both positive integers. The light source also includes a light-emitting adjustment structure 20 located on the light-emitting side of the light-emitting unit group 10. The distance between the i-th group of light-emitting units 11 and the light-emitting adjustment structure 20 is constant, the distance between the j-th group of light-emitting units 12 and the light-emitting adjustment structure 20 is constant, and the light-emitting angle of the j-th group of light-emitting units 12 is greater than the light-emitting angle of the i-th group of light-emitting units 11.

[0023] In this embodiment, the light source includes a driving substrate 100 and a light-emitting unit group 10. The driving substrate 100 can be understood as an electronic substrate that can provide a stable and controllable electrical driving signal to the light-emitting element of the light source, and integrates functions such as driving control, power conversion, and signal transmission. The driving substrate 100 includes a driving circuit. Exemplarily, the driving substrate 100 includes, but is not limited to, an aluminum-based metal plate, and this embodiment of the invention does not impose any limitations on it.

[0024] The light-emitting unit group 10 can be understood as a light-emitting functional module with electrical driving characteristics, formed by combining multiple independent light-emitting units according to a preset arrangement and electrical connection relationship. The light-emitting unit group 10 can be driven as a whole. The light-emitting unit group 10 includes at least two groups of light-emitting units, and each group of light-emitting units includes multiple light-emitting elements. The light-emitting elements are the smallest independent optoelectronic devices that can directly convert energy forms such as electrical energy or light energy into visible light, and are the basic functional units for realizing electro-optical conversion. For example, the light-emitting elements include, but are not limited to, integrated LED light-emitting elements, and the embodiments of the present invention do not limit this.

[0025] Specifically, each group of light-emitting units 11 is arranged according to a preset layout, and multiple light-emitting elements in each group of light-emitting units are connected according to a preset electrical connection relationship. The light-emitting unit group 10 includes an i-th group of light-emitting units 11 and a j-th group of light-emitting units 12. The j-th group of light-emitting units 12 surrounds at least a portion of the i-th group of light-emitting units 11, forming a surrounding structure in which multiple peripheral light-emitting units are sequentially electrically connected to the driving substrate 100 radially outward from the central light-emitting unit. For example, as... Figure 1 and Figure 3 As shown, the surrounding structure includes, but is not limited to, concentric ring structures and matrix-distributed surrounding structures. The outline of the light-emitting unit includes, but is not limited to, square outlines and circular outlines. This embodiment of the invention does not impose any limitations on these.

[0026] It should be noted that the i-th group of light-emitting units 11 and the j-th group of light-emitting units 12 can be two adjacent groups of light-emitting units, such as... Figure 1 and Figure 3 As shown; or, the i-th group of light-emitting units 11 and the j-th group of light-emitting units 12 may also be two non-adjacent groups of light-emitting units (not shown in the figure). In this embodiment, the specific positional relationship between the i-th group of light-emitting units 11 and the j-th group of light-emitting units 12 is not limited, as long as the j-th group of light-emitting units 12 surrounds at least part of the i-th group of light-emitting units 11.

[0027] It should also be noted that, Figure 1 and Figure 3 The examples used here are all closed-loop light-emitting units. It is understood that the light-emitting units can also be non-closed light-emitting units, such as light-emitting units with an approximate "U" or "n" shaped structure. The specific shape of each group of light-emitting units is not limited in the embodiments of this application.

[0028] The i-th group of light-emitting units 11 and the j-th group of light-emitting units 12 are independently electrically connected to the driving substrate 100 to form independent driving circuits. Here, i and j are both positive integers. Each group of light-emitting units can be driven to emit light independently. The control between the i-th group of light-emitting units 11 and the j-th group of light-emitting units 12 will not affect each other.

[0029] The light source also includes a light emission adjustment structure 20 located on the light emission side of the light-emitting unit group 10. The light emission adjustment structure 20 can be understood as an optical device capable of refraction, reflection, scattering, or collimation of the light emitted from the light source. Made of optical materials and possessing a fixed shape and optical parameters, it can act on the emitted light from the light source to change the propagation characteristics of the light to match different lighting needs. Exemplarily, the light emission adjustment structure 20 includes, but is not limited to, an optical lens; this embodiment of the invention does not impose limitations on this.

[0030] like Figure 2 and Figure 4 As shown, the distance u between the i-th group of light-emitting units 11 and the light-emitting adjustment structure 20 is constant, and the distance u between the j-th group of light-emitting units 12 and the light-emitting adjustment structure 20 is also constant. The position of the light-emitting adjustment structure 20 is fixed, and the light-emitting angle of the light source can be changed without moving it. The light-emitting angle of the j-th group of light-emitting units 12 is greater than that of the i-th group of light-emitting units 11. The light-emitting angle can be understood as the angle between the light rays emitted by the light-emitting elements at the position with the maximum distance from the geometric center of light emission in the light-emitting unit 11, such as... Figure 2 Angle shown Starting from the geometric center of the driving substrate 100, each group of light-emitting units is lit up sequentially in a radially outward direction. As the light-emitting area of ​​the light source gradually increases, the light-emitting angle changes with the change in the light-emitting area of ​​the light source, thereby achieving the purpose of using the same light-emitting adjustment structure 20 to realize multiple different light-emitting angles of the light source within a fixed spatial structure.

[0031] For example, such as Figure 2 As shown, when only the i-th group of light-emitting units 11 is controlled to light up and the other light-emitting units are not working, the outer diameter of the entire light-emitting area of ​​the light source is d1, and the corresponding light-emitting angle of the light source is d1. .like Figure 4 As shown, when the i-th group of light-emitting units 11 and the j-th group of light-emitting units 12 are lit and the remaining light-emitting units are not working, the outer diameter of the entire light-emitting area of ​​the light source is d2, and the corresponding light-emitting angle of the light source is d2. . Figure 5 This is a schematic diagram of the light emission angle of another light source provided in an embodiment of the present invention, specifically a schematic diagram of the light emission angle of the p-th group of light-emitting elements, as shown below. Figure 5 As shown, when the i-th group of light-emitting units 11, the j-th group of light-emitting units 12, and the p-th group of light-emitting units 13 are lit, and the remaining light-emitting units are not working, the outer diameter of the entire light-emitting area of ​​the light source is d3, and the corresponding light-emitting angle of the light source is θ. < <θ. It should be noted that the outer diameter of the light source is the straight-line distance from the geometric center of the light-emitting unit group 10 to the outermost outermost part of the light-emitting unit group.

[0032] The light source provided in this embodiment of the invention includes an i-th group of light-emitting units 11 and a j-th group of light-emitting units 12. The j-th group of light-emitting units 12 surrounds at least a portion of the i-th group of light-emitting units 11, and the i-th group of light-emitting units 11 and the j-th group of light-emitting units 12 are independently electrically connected to a driving substrate 100. Furthermore, the emission angle of the j-th group of light-emitting units is greater than that of the i-th group of light-emitting units. Further, the light source also includes a light-emitting adjustment structure 20 located on the light-emitting side of the light-emitting unit group 10. The distance between the i-th group of light-emitting units 11 and the light-emitting adjustment structure 20 is constant, and the distance between the j-th group of light-emitting units 12 and the light-emitting adjustment structure 20 is also constant. By employing the above scheme, multiple light-emitting units arranged in an encircling configuration are independently controlled, maintaining a constant distance between the light-emitting adjustment structure 20 and different light-emitting units. This allows the same light-emitting adjustment structure 20 to emit multiple different emission angles from the same light source within a fixed spatial structure, reducing the design, development, and manufacturing costs of the light source, and decreasing its size. It solves the problems of increasing design, development and manufacturing costs due to the separate design, development and manufacturing of optical devices corresponding to multiple light emission angles, as well as the problems of large light source size and complex mechanical structure for adjusting the light source position.

[0033] Optional, you can continue to refer to Figure 1 The emission angle of the i-th group of light-emitting units 11 is The emission angle of the j-th group of light-emitting units 12 is The maximum distance between the setting area of ​​the i-th group of light-emitting units 11 and the center of the light-emitting unit group 10 is L. i The maximum distance between the setting area of ​​the j-th group of light-emitting units 12 and the center of the light-emitting unit group 10 is L. j ;in, , where a is a positive number.

[0034] Specifically, the emission angle of the i-th group of light-emitting units 11 This can be understood as the angle between the light rays emitted by the light-emitting elements at the maximum distance from the geometric center of light emission in the i-th group of light-emitting units 11; and the emission angle of the j-th group of light-emitting units 12. This can be understood as the angle between the light rays emitted by the light-emitting elements at the position with the maximum distance from the geometric center of light emission in the j-th group of light-emitting units 12; Let L be the difference between the emission angle of the j-th group of light-emitting units 12 and the emission angle of the i-th group of light-emitting units 11. The maximum distance between the setting area of ​​the i-th group of light-emitting units 11 and the center of the light-emitting unit group 10 is L. i The maximum distance between the setting area of ​​the j-th group of light-emitting units 12 and the center of the light-emitting unit group 10 is L. j Among them, L iL can be understood as the distance from the geometric center of the light-emitting unit group 10 to the outermost edge of the i-th group of light-emitting units 11. j L can be understood as the distance from the geometric center of the light-emitting unit group 10 to the outermost edge of the j-th group of light-emitting units 12. j -L i This is the difference between the maximum distance between the setting area of ​​the j-th group of light-emitting units 12 and the center of the light-emitting unit group 10, and the maximum distance between the setting area of ​​the i-th group of light-emitting units 11 and the center of the light-emitting unit group 10. Furthermore, 'a' is a positive number, meaning that the difference in the light emission angle range between any two groups of light-emitting units is positively correlated with the difference in the maximum distance between the setting area of ​​the two groups of light-emitting units and the center of the light-emitting unit group 10. When the difference in the maximum distance between the setting area of ​​the two groups of light-emitting units and the center of the light source is large, the difference in the light emission angle range between the two groups of light-emitting units is large; when the difference in the maximum distance between the setting area of ​​the two groups of light-emitting units and the center of the light source is small, the difference in the light emission angle range between the two groups of light-emitting units is small.

[0035] For example, the maximum distance L1 between the setting area of ​​the first group of light-emitting units and the center of the light-emitting unit group 10 is 5mm, the maximum distance L2 between the setting area of ​​the second group of light-emitting units and the center of the light-emitting unit group 10 is 10mm, and the maximum distance L3 between the setting area of ​​the third group of light-emitting units and the center of the light-emitting unit group 10 is 20mm. Then the emission angle of the first group of light-emitting units... The emission angle of the second group of light-emitting units is 10°. The emission angle of the third group of light-emitting units is 15°. The angle is 25°. Therefore, the difference between the maximum distance between the setting area of ​​the first group of light-emitting units and the center of the light-emitting unit group 10 and the maximum distance between the setting area of ​​the second group of light-emitting units and the center of the light-emitting unit group 10 is 5mm, and the difference between the maximum distance between the setting area of ​​the second group of light-emitting units and the center of the light-emitting unit group 10 and the maximum distance between the setting area of ​​the third group of light-emitting units and the center of the light-emitting unit group 10 is 10mm. The light emission angle of the first group of light-emitting units... The emission angle of the second group of light-emitting units The light emission angle between them changes by 5°, and the light emission angle of the second group of light emission units... The emission angle of the third group of light-emitting units The change in the emission angle between them is 10°. That is, the difference in the emission angle range of any two groups of light-emitting units is positively correlated with the difference in the maximum distance between the setting area of ​​the two groups of light-emitting units and the center of the light source of the light-emitting unit group 10.

[0036] The light source provided in this embodiment of the invention is positively correlated with the difference in the light emission angle range between any two adjacent sets of light-emitting units and the difference in the maximum distance between the setting area of ​​the two sets of light-emitting units and the center of the light-emitting unit group 10. Thus, by changing the difference in the maximum distance between the setting area of ​​the two sets of light-emitting units and the center of the light-emitting unit group 10, precise control of the degree of change in the light emission angle range of the light source can be achieved. This enables flexible and precise adjustment of the light emission angle on the same finished light source, with a simple structure and high efficiency, solving the problems of large light source size and complex light emission angle adjustment.

[0037] Optional, you can continue to refer to Figure 1 , Figure 2 and Figure 4 Along the optical axis of the light source, the distance between the i-th group of light-emitting units 11 and the light-emitting adjustment structure 20 is the same as the distance between the j-th group of light-emitting units 12 and the light-emitting adjustment structure 20.

[0038] Specifically, a light emission adjustment structure 20 is arranged along the optical axis of the light source. This structure is used to collimate, transmit, or focus the light emitted from the light source. The light emission adjustment structure 20 is positioned in a fixed location and its position does not change. The distance u between the i-th group of light-emitting units 11 and the light emission adjustment structure 20 is the same as the distance u between the j-th group of light-emitting units 12 and the light emission adjustment structure 20. By ensuring that the distances from both groups of light-emitting units to the light emission adjustment structure 20 are the same, the light emitted from both groups enters the same light emission adjustment structure 20. This eliminates the need for multiple matching light emission adjustment structures 20; the change in the light emission angle of the light source can be achieved simply by controlling the change in the light emission area of ​​the light-emitting unit group 10.

[0039] For example, the light emission adjustment structure 20 is set at a position 3cm away from the light emission surface of the light emission unit. Along the optical axis of the light source, the distance between the first group of light emission units and the light emission adjustment structure 20 is 3cm, and the distance between the second group of light emission units and the light emission adjustment structure 20 is also 3cm.

[0040] The light source provided in this embodiment of the invention ensures that the light emitted by different light-emitting units is located on the same optical surface of the light-emitting adjustment structure 20 by setting the distance between the i-th group of light-emitting units 11 and the light-emitting adjustment structure 20 along the optical axis of the light source to be the same as the distance between the j-th group of light-emitting units 12 and the light-emitting adjustment structure 20. This allows the light-emitting adjustment structure 20 to regulate the light emitted by two different groups of light-emitting units with the same optical magnification or convergence angle, ensuring consistency and uniformity of the output light pattern after different light-emitting units pass through the same lens. This achieves efficient sharing of the same light-emitting adjustment structure 20 by multiple different groups of light-emitting units. It controls the light emission angle of the light source within the same spatial structure, and achieves coordinated light emission of multiple groups of light-emitting units through a single light-emitting adjustment structure 20, reducing the spatial volume of the light source and making it miniaturized and convenient. It solves the problem of complex structure and large size of the light source caused by setting multiple corresponding light-emitting adjustment structures 20 for different light-emitting units in the same light source device.

[0041] Optional, you can continue to refer to Figure 1 The driving voltage of the i-th group of light-emitting units 11 is U i The driving voltage of the j-th group of light-emitting units 12 is U j ;in, .

[0042] Specifically, the driving voltage of the i-th group of light-emitting units 11 is set to U. i and the driving voltage U of the j-th group of light-emitting units 12 j Between The relationship is that the driving voltage of the i-th group of light-emitting units 11 is U. i and the driving voltage U of the j-th group of light-emitting units 12 j The driving voltages of different light-emitting units are kept consistent, either identically or approximately identically, without considering voltage fluctuations. Each group of light-emitting units is driven and controlled by the same preset driving voltage. This setup facilitates the selection or design of a suitable driving control module. For example, different light-emitting units can be driven using the same voltage driving module.

[0043] For example, the driving voltage U of the i-th group of light-emitting units 11 i and the driving voltage U of the j-th group of light-emitting units 12 j The selection of the driving voltage can be adapted to the load of the light source. The commonly used range for the driving voltage of the light source is 30V~36V, and this embodiment of the invention does not impose any restrictions on this.

[0044] The light source provided in this embodiment of the invention, by setting the driving voltage U of the i-th group of light-emitting units 11 i and the driving voltage U of the j-th group of light-emitting units 12 jFor components that are identical or nearly identical, the same voltage driving module can be used to drive different light-emitting elements. The driving methods for different light-emitting units are simple, simplifying the driving control logic and ensuring the stability of the light output efficiency from multiple angles. This also reduces the number of drivers required, decreases the size of the light source, and solves the problem of complex light source structure and high design cost caused by complex driving control when a single optical device is used to accommodate multiple light-emitting units.

[0045] Optional, you can continue to refer to Figure 1 The light-emitting unit group 10 also includes a p-th group of light-emitting units 13; p is a positive integer; multiple light-emitting elements in the p-th group of light-emitting units 13 are connected in parallel.

[0046] Specifically, the light-emitting unit group 10 also includes a p-th group of light-emitting units 13, where p is a positive integer. The p-th group of light-emitting units 13 can be any group of light-emitting units in the light-emitting unit group. The multiple light-emitting elements in the p-th group of light-emitting units 13 are connected in parallel. Since the parallel voltage is the same, the number of light-emitting elements in each group of light-emitting units will not affect the driving voltage. This electrical connection method can ensure that the multiple light-emitting elements in each light-emitting unit have the same driving voltage.

[0047] For example, when the p-th group of light-emitting units 13 includes 12 3V light-emitting elements, each with a size of 0.5mm × 0.5mm, and the 12 light-emitting elements are electrically connected in parallel, the driving voltage of the p-th group of light-emitting units 13 remains at 3V. When the p-th group of light-emitting units 13 includes 20 3V light-emitting elements, each with a size of 0.5mm × 0.5mm, and all 20 light-emitting elements are electrically connected in parallel, the driving voltage of the p-th group of light-emitting units 13 is still 3V.

[0048] The light source provided in this invention, by setting the light-emitting elements in any group of light-emitting units to be connected in parallel, utilizes the principle that the branch voltages of multiple light-emitting elements connected in parallel are equal, ensuring that the driving voltage of multiple light-emitting elements in any group of light-emitting units is the same and unaffected by the number of light-emitting elements in each group. This arrangement eliminates the need for additional voltage regulation and calibration circuits, avoiding voltage regulation errors and simplifying the structure of the driving circuit. It also achieves flexible design of the number of light-emitting elements and compatibility with the voltage uniformity of the light-emitting elements. It solves the problems of voltage consistency being affected by regulation errors due to reliance on external regulation circuits to achieve voltage uniformity and the complexity of the circuit structure.

[0049] Optional, you can continue to refer to Figure 1The light-emitting unit group 10 also includes a qth group of light-emitting units 14; q is a positive integer; the qth group of light-emitting units 14 includes at least one light-emitting sub-unit (not shown in the figure), and the light-emitting sub-unit includes multiple light-emitting elements; the multiple light-emitting elements in the same light-emitting sub-unit are connected in series; when the qth group of light-emitting units 14 includes at least two light-emitting sub-units, any two light-emitting sub-units are connected in parallel.

[0050] In this embodiment, the light-emitting unit group 10 further includes a qth group of light-emitting units 14, where q is a positive integer. The qth group of light-emitting units 14 can be any group of light-emitting units in the light-emitting unit group 10. The qth group of light-emitting units 14 includes at least one light-emitting sub-unit, and the light-emitting sub-unit includes multiple light-emitting elements. A light-emitting sub-unit can be understood as a series-connected light-emitting unit structure formed by electrically connecting multiple light-emitting elements in a light-emitting unit. For example, the qth group of light-emitting units 14 includes 24 light-emitting elements, which are uniformly distributed within the area of ​​the qth group of light-emitting units 14 and fixed to the driving substrate 100 by die-attach adhesive. If the 24 light-emitting elements are divided into two groups, with 12 light-emitting elements in each group electrically connected in series to form a light-emitting sub-unit, then the qth group of light-emitting units 14 includes two light-emitting sub-units. This embodiment of the invention does not impose any limitation on this.

[0051] Specifically, multiple light-emitting elements in the same light-emitting subunit are connected in series, and any two light-emitting subunits are connected in parallel. When the qth group of light-emitting units 14 includes one light-emitting subunit, the multiple light-emitting elements in the light-emitting subunit are connected in series. When the qth group of light-emitting units includes at least two light-emitting subunits, any two light-emitting subunits are connected in parallel. Through this electrical connection method of multiple light-emitting elements in the same light-emitting subunit being connected in series and multiple light-emitting subunits being connected in parallel, multiple light-emitting subunits can have the same driving voltage, and the number of light-emitting elements in each group of light-emitting units has no effect on the driving voltage.

[0052] For example, when the qth group of light-emitting units 14 includes 12 light-emitting elements, each with an input voltage of 3V, and each light-emitting element is evenly distributed within the light-emitting area of ​​the qth group of light-emitting units 14 and fixed to the driving substrate 100 by die-bonding adhesive, and the 12 light-emitting elements are connected in series electrically, then the driving voltage of the qth group of light-emitting units 14 is 36V. When the qth group of light-emitting units 14 includes 24 light-emitting elements, each with an input voltage of 3V, and each light-emitting element is evenly distributed within the light-emitting area of ​​the qth group of light-emitting units 14 and fixed to the driving substrate 100 by die-bonding adhesive, then the 24 light-emitting elements are divided into 2 light-emitting sub-units, each light-emitting sub-unit has 12 light-emitting elements connected in series, and the 2 light-emitting sub-units are connected in parallel electrically, so that the driving voltage of the qth group of light-emitting units 14 is 36V. When the qth group of light-emitting units 14 includes 36 light-emitting elements with an input voltage of 3V, and each light-emitting element is evenly distributed in the light-emitting area of ​​the qth group of light-emitting units 14 and fixed on the driving substrate 100 by means of die-bonding adhesive, the 36 light-emitting elements are divided into 3 light-emitting sub-units. Each light-emitting sub-unit is provided with 12 light-emitting elements electrically connected in series, and the 3 light-emitting sub-units are electrically connected in parallel, so that the driving voltage of the qth group of light-emitting units 14 is 36V.

[0053] Furthermore, when the number of light-emitting elements contained in the light-emitting subunit is small, the input voltage of each light-emitting element in the light-emitting subunit is controlled to be higher. When the number of light-emitting elements contained in the light-emitting subunit is large, the input voltage of each light-emitting element is controlled to be lower. By combining multiple light-emitting subunits electrically connected in parallel and multiple light-emitting elements in each light-emitting subunit electrically connected in series, the driving voltage of each light-emitting subunit in the light-emitting subunit is made consistent.

[0054] The light source provided in this embodiment of the invention includes at least one light-emitting sub-unit in each light-emitting unit group 10. Each light-emitting sub-unit is provided with multiple light-emitting elements. By connecting multiple light-emitting elements in the same light-emitting sub-unit in series and connecting any two light-emitting sub-units in parallel, the driving voltage of multiple light-emitting sub-units in each group of light-emitting units is the same and is not affected by the number of light-emitting elements in each group of light-emitting units. This achieves efficient driving of multiple light-emitting elements in the light-emitting unit, improves the stability of light emission from multiple emission angles of the light source, eliminates the need for additional voltage adjustment and calibration circuits, and reduces the size and design cost of the driving substrate 100.

[0055] Optional, you can continue to refer to Figure 1 and Figure 3The driving substrate 100 includes an electrical pad group 40; the light-emitting element includes a first electrode (not shown) and a second electrode (not shown); the electrical pad group 40 includes a plurality of electrical pad units 30, and the electrical pad unit 30 includes a first electrode pad 31 and a second electrode pad 32; at least one first electrode in the light-emitting unit is electrically connected to the first electrode pad 31, and at least one second electrode is electrically connected to the second electrode pad 32; or, the electrical pad group 40 includes a common first electrode pad 41 and a plurality of second electrode pads 32; at least one first electrode in any light-emitting unit is electrically connected to the common first electrode pad 41, and at least one second electrode in each light-emitting unit is electrically connected to the second electrode pad 32.

[0056] In this embodiment, the driving substrate 100 includes an electrical pad group 40. The electrical pad group 40 can be understood as a collection of multiple independent electrical pads formed on the surface of the driving substrate 100 according to a preset arrangement, electrical connection relationship, and functional partitioning. It serves as the physical interface for electrical signal transmission on the driving substrate 100 and has conductive function. Exemplarily, the electrical pad group 40 includes, but is not limited to, electrical circuits printed on the surface of the driving substrate 100; this embodiment of the invention does not impose limitations on this. The electrical pad group 40 includes multiple electrical pad units 30, and each electrical pad unit 30 includes a first electrode pad 31 and a second electrode pad 32. The first electrode pad 31 and the second electrode pad 32 can be understood as a pair of complementary conductive welding structures divided according to electrode polarity and current transmission direction, serving as a polarity interface for directional electrical conduction between internal circuitry and the light-emitting element. Exemplarily, the first electrode pad 31 and the second electrode pad 32 include one of a positive electrode electrical pad and a negative electrode electrical pad, and they are not identical; this embodiment of the invention does not impose limitations on this.

[0057] Specifically, a first electrode pad 31 and a second electrode pad 32 constitute an electrical pad unit 30, and the number of electrical pad units 30 corresponds to the number of light-emitting units. The light-emitting element includes a first electrode and a second electrode. The first electrode can be the positive electrode of the light-emitting element, and the second electrode can be the negative electrode; however, this embodiment of the invention does not impose limitations on this. At least one first electrode in each light-emitting unit is electrically connected to the first electrode pad 31, and at least one second electrode is electrically connected to the second electrode pad 32.

[0058] For example, when the light-emitting elements in the light-emitting unit are all electrically connected in parallel, the first electrode of each light-emitting element in the same group of light-emitting units is electrically connected to a first electrode pad 31, and the second electrode of each light-emitting element in the same group of light-emitting units is electrically connected to a corresponding second electrode pad 32. Multiple groups of light-emitting units are individually electrically connected to the electrical pad unit 30 corresponding to the light-emitting unit.

[0059] When the light-emitting elements in the light-emitting unit are connected in series, the first electrode of the light-emitting subunit formed by the series connection of the light-emitting elements in the same group of light-emitting units is electrically connected to a first electrode pad 31, the second electrode is electrically connected to a corresponding second electrode pad 32, and multiple groups of light-emitting units are individually electrically connected to the electrical pad unit 30 corresponding to the light-emitting unit.

[0060] In another embodiment, the electrical pad group 40 further includes a common first electrode pad 41 and a plurality of second electrode pads 32. The common first electrode pad 31 can be understood as a positive electrode pad shared by multiple independent light-emitting units on the driving substrate 100, a common polarity conductive welding structure capable of uniformly welding the positive electrode pins of multiple light-emitting elements and electrically connecting them to the positive electrode of the driving circuit. Exemplarily, the common first electrode pad 41 includes, but is not limited to, a common anode pad. The second electrode pads 32 can be understood as multiple independently configured conductive welding structures electrically connected to the negative electrode of the driving circuit. The second electrode pads 32 include, but are not limited to, a plurality of cathode pads; this embodiment of the invention does not impose limitations on this.

[0061] Specifically, at least one first electrode in any light-emitting unit is electrically connected to a common first electrode pad 41, and at least one second electrode in each light-emitting unit is electrically connected to a second electrode pad 32. The first electrodes of multiple light-emitting elements in any group of light-emitting units are all electrically connected to the common first electrode pad 41, and the second electrodes of multiple light-emitting elements in each group of light-emitting units are independently connected to their respective second electrode pads 32.

[0062] For example, when the light-emitting elements in each light-emitting unit are electrically connected in parallel, the first electrodes of the 12 light-emitting elements in the i-th group of light-emitting units and the first electrodes of the 24 light-emitting elements in the j-th group of light-emitting units are all connected to the common first electrode pad 41, the second electrodes of the 12 light-emitting elements in the i-th group of light-emitting units are connected to the first second electrode pad 32, and the second electrodes of the 24 light-emitting elements in the j-th group of light-emitting units are connected to the second second electrode pad 32.

[0063] The power supply provided in this embodiment of the invention, by setting an electrical pad group 40 including multiple electrical pad units 30 on the driving substrate 100, each electrical pad unit 30 including a first electrode pad 31 and a second electrode pad 32, and each light-emitting element including a first electrode and a second electrode. At least one first electrode in each light-emitting element is electrically connected to the first electrode pad 31, and at least one second electrode is electrically connected to the second electrode pad 32. Alternatively, the electrical pad group 40 includes a common first electrode pad 41 and multiple second electrode pads 32, with at least one first electrode in any light-emitting element electrically connected to the common first electrode pad 41, and at least one second electrode in each light-emitting element electrically connected to the second electrode pad 32. Through two flexible electrode connection methods—one-to-one independent electrical pad units 30 and common first electrode pad 41 and independent second electrode pads 32—precise and independent control of the light-emitting elements is achieved. Simultaneously, the two electrode connection methods flexibly match the circuit topology and drive control requirements of different light-emitting elements, improving the versatility of the pad design. The circuit structure of the driving substrate is simplified, the space occupied by the pads and lines is reduced, and the problem that the light-emitting unit cannot be independently driven and controlled due to the lack of modular design of the pads, and cannot adapt to the light emission requirements of multiple light emission angles is solved.

[0064] Optional, you can continue to refer to Figure 1 The light-emitting element includes a light-emitting chip (not shown in the figure) and a fluorescent film (not shown in the figure), with the fluorescent film located on the light-emitting side of the light-emitting chip.

[0065] In this embodiment, the light-emitting element includes a light-emitting chip and a fluorescent film. The light-emitting chip can be understood as a semiconductor functional chip capable of converting electrical signals into optical signals; it is the core functional device of the light-emitting element. Exemplarily, the light-emitting chip includes, but is not limited to, LED chips, and this embodiment of the invention does not impose any limitations on this. The fluorescent film can be understood as a fluorescence conversion functional film material capable of realizing light wavelength conversion, receiving excitation light from a light source, and converting it into visible light of a specific wavelength through the photoluminescence effect of phosphors. The choice of the fluorescent film's formulation and thickness is related to the color temperature parameters of the light source being manufactured, and this embodiment of the invention does not impose any limitations on this.

[0066] Specifically, the fluorescent film is located on the light-emitting side of the light-emitting chip, with one fluorescent film corresponding to each chip. The size of the fluorescent film is the same as the light-emitting surface size of the chip. By setting a fluorescent film with the same size as the light-emitting surface on the chip surface, the uniformity of the emitted light color and the consistency of the color space are improved, thus enhancing the light emission effect of the light source. This solves the problems of poor light emission consistency and uneven light color caused by the uneven thickness and irregular coating pattern of traditional fluorescent adhesive layers.

[0067] The light source provided in this invention ensures uniform color across the entire emission range of the light-emitting chip by setting a fluorescent film that is fitted to the size of the chip on the light-emitting surface, reducing local color difference problems, ensuring color consistency of light emitted from multiple emission angles, and occupying little space. This solves the problems of poor light emission consistency and uneven color caused by uneven thickness and irregular coating patterns in traditional fluorescent adhesive layers, as well as the large space occupation caused by overflow of fluorescent adhesive during coating.

[0068] Optional, you can continue to refer to Figure 1 The light source also includes a light-emitting gap 50 located between two adjacent groups of light-emitting units; in the radial direction, the width d of the light-emitting gap 50 satisfies d < 0.15 mm.

[0069] In this embodiment, the light source also includes a light-emitting gap 50 located between two adjacent groups of light-emitting units. The light-emitting gap 50 can be understood as a specific spatial area in the arrangement structure of the light-emitting unit groups where no light-emitting element is provided between two adjacent groups of light-emitting units and no light-emitting element participates in the light emission.

[0070] Specifically, because the light conversion of the light-emitting chip is achieved by setting a fluorescent film instead of a fluorescent adhesive layer, the fluorescent film is thinner and lighter than the fluorescent adhesive layer, and has better compatibility with the light-emitting chip. It avoids the problem of the fluorescent adhesive layer being coated on such a tiny unit as the light-emitting chip, causing the adhesive to overflow into the light-emitting gap 50 due to capillary action, thus increasing the gap 50 between different light-emitting elements. Furthermore, it avoids the problem of the light-emitting gap 50 between adjacent light-emitting units widening. Therefore, the light-emitting gap 50 between different light-emitting elements can be controlled to a smaller size. In the radial direction, the width d of the light-emitting gap 50 between adjacent light-emitting units can also be controlled to a smaller size, satisfying d < 0.15 mm, enhancing the integrity and uniformity of the overall light emission from the light source. In contrast, with the conventional method of setting a fluorescent adhesive layer, the width d of the light-emitting gap 50 is usually controlled to 0.5 mm, which easily leads to obvious light emission jumps and poor light emission integrity.

[0071] The light source provided in this embodiment of the invention includes a light-emitting gap 50 between two adjacent groups of light-emitting units. A fluorescent film is used instead of a fluorescent adhesive layer to complete the light emission conversion. The width d of the light-emitting gap 50 is less than 0.15 mm along the radial direction of the light-emitting unit. This arrangement ensures the continuity of the surface light of the light source, avoids breakage of the light pattern at the light-emitting gap 50, and enhances the overall integrity and uniformity of the light emission from the light source. Within a fixed spatial structure, it maximizes the proportion of the light-emitting area of ​​the light source, increases the light emission density, and solves the problem of uneven light emission caused by splicing multiple groups of light-emitting units.

[0072] Optional, you can continue to refer to Figure 3The light-emitting unit also includes the m-th group of light-emitting units 15 and the n-th group of light-emitting units 16. The color temperature and / or color of the light-emitting elements in the m-th group of light-emitting units 15 and the n-th group of light-emitting units 16 are different; m and n are both positive integers.

[0073] Specifically, color temperature can be understood as the spectral attribute describing the "warmth or coolness" of light, while color can be understood as the spectral attribute describing the different emitted colors of light, such as red, green, and blue. The light-emitting unit also includes the m-th group of light-emitting units 15 and the n-th group of light-emitting units 16, which can be any two groups of light-emitting units within the light-emitting unit group. The color temperature and color of the light-emitting element in the m-th group of light-emitting units 15 are both different from those of the light-emitting element in the n-th group of light-emitting units 16; or the color temperature of the light-emitting element in the m-th group of light-emitting units 15 is different from that of the light-emitting element in the n-th group of light-emitting units 16; or the color of the light-emitting element in the m-th group of light-emitting units 15 is different from that of the light-emitting element in the n-th group of light-emitting units 16.

[0074] For example, the color of the light-emitting element in the m-th group of light-emitting units can be yellow, the color of the light-emitting element in the n-th group of light-emitting units can be blue, the color temperature of the light-emitting element in the m-th group of light-emitting units can be warm, and the color temperature of the light-emitting element in the n-th group of light-emitting units can be cool. This embodiment of the invention does not impose any restrictions on this.

[0075] The light source provided in this embodiment of the invention features light-emitting elements in the m-th group of light-emitting units 15 and the n-th group of light-emitting units 16 with different color temperatures and / or colors. This allows for the output of light from multiple different emission angles while also achieving mixed-light output effects with different color temperatures and colors, improving the light source's scene adaptability and functional integration. It solves the problems of traditional single light sources having fixed color temperatures, being unable to simultaneously provide illumination, and failing to meet the light source requirements of different application scenarios.

[0076] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, combinations, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A light source, characterized in that, It includes a driving substrate and a light-emitting unit group, wherein the light-emitting unit group includes at least two groups of light-emitting units, and the light-emitting unit includes multiple light-emitting elements; The light-emitting unit group includes an i-th group of light-emitting units and a j-th group of light-emitting units, wherein the j-th group of light-emitting units surrounds at least a portion of the i-th group of light-emitting units, and the i-th group of light-emitting units and the j-th group of light-emitting units are independently electrically connected to the driving substrate; wherein i and j are both positive integers; The light source also includes a light emission adjustment structure located on the light emission side of the light-emitting unit group. The distance between the i-th group of light-emitting units and the light emission adjustment structure is constant, the distance between the j-th group of light-emitting units and the light emission adjustment structure is constant, and the light emission angle of the j-th group of light-emitting units is greater than the light emission angle of the i-th group of light-emitting units.

2. The light source according to claim 1, characterized in that, The emission angle of the i-th group of light-emitting units is The emission angle of the j-th group of light-emitting units is ; The maximum distance between the area where the i-th group of light-emitting units is located and the center of the group of light-emitting units is L. i The maximum distance between the setting area of ​​the j-th group of light-emitting units and the center of the group of light-emitting units is L. j ; in, , where a is a positive number.

3. The light source according to claim 1, characterized in that, Along the optical axis of the light source, the distance between the i-th group of light-emitting units and the light-emitting adjustment structure is the same as the distance between the j-th group of light-emitting units and the light-emitting adjustment structure.

4. The light source according to claim 1, characterized in that, The driving voltage of the i-th group of light-emitting units is U i The driving voltage of the j-th group of light-emitting units is U j ; in, .

5. The light source according to claim 4, characterized in that, The light-emitting unit group also includes the p-th group of light-emitting units; p is a positive integer; The plurality of light-emitting elements in the p-th group of light-emitting units are arranged in parallel.

6. The light source according to claim 4, characterized in that, The light-emitting unit group also includes the qth group of light-emitting units; q is a positive integer; The qth group of light-emitting units includes at least one light-emitting sub-unit, and the light-emitting sub-unit includes a plurality of light-emitting elements; Multiple light-emitting elements in the same light-emitting subunit are connected in series; When the qth group of light-emitting units includes at least two light-emitting sub-units, any two light-emitting sub-units are connected in parallel.

7. The light source according to claim 1, characterized in that, The substrate includes an electrical pad assembly; The light-emitting element includes a first electrode and a second electrode; The electrical pad group includes multiple electrical pad units, and each electrical pad unit includes a first electrode pad and a second electrode pad; at least one first electrode in the light-emitting unit is electrically connected to the first electrode pad, and at least one second electrode is electrically connected to the second electrode pad. Alternatively, the electrical pad group includes a common first electrode pad and a plurality of second electrode pads; at least one first electrode in any of the light-emitting units is electrically connected to the common first electrode pad, and at least one second electrode in each of the light-emitting units is electrically connected to the second electrode pad.

8. The light source according to claim 1, characterized in that, The light-emitting element includes a light-emitting chip and a fluorescent film, with the fluorescent film located on the light-emitting side of the light-emitting chip.

9. The light source according to claim 8, characterized in that, The light source also includes a light-emitting gap located between two adjacent groups of light-emitting units; Along the radial direction, the width d of the light-emitting gap satisfies d < 0.15 mm.

10. The light source according to claim 1, characterized in that, The light-emitting unit further includes a group of m light-emitting units and a group of n light-emitting units. The light-emitting elements in the group of m light-emitting units and the group of n light-emitting units have different color temperatures and / or different colors; m and n are both positive integers.

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