LED lamp bead, flashlight and lamp

Abstract

The utility model discloses an LED lamp bead, a flashlight and a lamp. The LED lamp bead comprises a substrate, the conductive electrode is arranged on the substrate and is positioned on the second side; the plurality of first areas are annular areas, the plurality of first areas are arranged on the substrate and are located on the first side, the orthographic projection contours of the plurality of first areas on the first side are gradually reduced, the plurality of first areas are sequentially arranged in a sleeving manner, each first area is provided with a plurality of LED chips and is connected with the conductive electrode, and the light-emitting surfaces of the LED chips are far away from the first side; and the fluorescent layer is arranged on the substrate. According to the technical scheme, when a plurality of light-emitting areas are arranged, each light-emitting area is provided with a plurality of LED chips instead of being provided with a plurality of lamp beads, so that cost is reduced, in addition, light emitting of multiple light areas can be achieved through one lamp bead, and the formed light source structure is more compact in size.

Description

Technical Field

[0001] The utility model relates to the technical field of lighting, in particular to an LED lamp bead, a flashlight and a lamp. Background Art

[0002] LED (Light Emitting Diode) is an electroluminescent semiconductor material chip, which has the advantages of high luminous efficiency and long life. Therefore, LED is widely used in the field of lighting.

[0003] At present, in the application of LEDs, in order to make flashlights, lamps, etc. have multiple light zones, multiple light-emitting zones are set on the substrate, and multiple LED lamp beads (also known as light-emitting diode lamp beads) are set as needed in each light-emitting zone. The light zones are switched by lighting up the LED lamp beads in different light zones. Although this method can achieve the switching of multiple light zones, it requires multiple LED lamp beads to be set in each light zone during the setting, resulting in high cost. In addition, the setting of multiple LED lamp beads will also result in a large volume of the formed light source structure.

[0004] Therefore, the prior art still needs to be improved and developed. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present utility model is to provide an LED lamp bead, a flashlight and a lamp to solve the problem in the prior art that when multiple light zones are set, multiple LED lamp beads need to be set in each light zone, resulting in high costs, and the setting of multiple LED lamp beads will also result in a large volume of the formed light source structure.

[0006] The technical solution adopted by the utility model to solve the technical problem is: to provide an LED lamp bead, including:

[0007] a substrate, the substrate comprising a first side and a second side disposed opposite to the first side;

[0008] a conductive electrode, disposed on the substrate and located on the second side;

[0009] A plurality of first regions, wherein the plurality of first regions are annular regions, the plurality of first regions are arranged on the substrate and located on the first side, the orthographic projection contours of the plurality of first regions on the first side gradually decrease, and the plurality of first regions are arranged in a nested manner, a plurality of LED chips are arranged in each of the first regions, and the LED chips are connected to the conductive electrode, and the light-emitting surfaces of the plurality of LED chips are located away from the first side;

[0010] A fluorescent layer is disposed on the substrate and is used to encapsulate the LED chip.

[0011] The further configuration of the utility model also includes:

[0012] A second region, wherein the second region is arranged on the first side of the substrate and is located within the ring of the innermost first region among the plurality of first regions, wherein the LED chip is arranged in the second region.

[0013] The further configuration of the utility model also includes:

[0014] A heat dissipation portion is disposed on the substrate and located at the second side.

[0015] According to a further configuration of the utility model, the first area is a circular area, and a plurality of LED chips in each circular area are distributed along the circumference of the circular area.

[0016] According to a further configuration of the utility model, the distance between any two adjacent LED chips in the same first area along the clockwise direction or the counterclockwise direction is equal to the distance between any other two adjacent LED chips in the same first area along the clockwise direction or the counterclockwise direction.

[0017] According to a further configuration of the present invention, the light density of all the LED chips arranged in the second area is greater than the light density of all the LED chips arranged in any of the first areas.

[0018] According to a further configuration of the present invention, the light density of the LED chips arranged in the first area gradually decreases from the inside to the outside.

[0019] The utility model also provides a flashlight, which comprises the LED lamp bead as described above.

[0020] The utility model also provides a lamp, which comprises the LED lamp bead as described above.

[0021] The beneficial effects of the utility model are:

[0022] The utility model discloses an LED lamp bead, a flashlight and a lamp, wherein the LED lamp bead comprises: a substrate, wherein the substrate comprises a first side and a second side arranged opposite to the first side; a conductive electrode, which is arranged on the substrate and located on the second side; a plurality of first areas, wherein the first areas are annular areas, the first areas are arranged on the substrate and located on the first side, the positive projection contours of the first areas on the first side gradually decrease, and the first areas are arranged in sequence, each of the first areas is provided with a plurality of LED chips, and the LED chips are connected to the conductive electrode, and the light-emitting surface of the LED chip is away from the first side; a fluorescent layer, wherein the fluorescent layer is arranged on the substrate, and the fluorescent layer is used to encapsulate the LED chip. In the technical solution of the present utility model, a plurality of first areas are set on the substrate, a plurality of LED chips are set in each first area, and each first area forms a light-emitting area. In specific use, when it is necessary to switch the light-emitting area, the light-emitting area can be switched by lighting the LED chip in the first area corresponding to the light-emitting area to be switched. It can be seen that when setting a plurality of light-emitting areas, a plurality of first light-emitting areas are set in one LED lamp bead, and a plurality of LED chips are set in each light-emitting area, instead of setting a plurality of LED lamp beads in each light-emitting area. Therefore, the cost is reduced. In addition, in the technical solution of the present utility model, multi-light-zone lighting can be achieved by one LED lamp bead, instead of multiple LED lamp beads. Therefore, the volume of the light source structure is more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary personnel in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 It is the front view of the LED lamp bead of the utility model.

[0025] Figure 2 It is a top view of the LED lamp bead of the utility model.

[0026] Figure 3 It is a bottom view of an LED lamp bead in one embodiment of the utility model.

[0027] Figure 4 It is an exploded view of an LED lamp bead in one embodiment of the utility model.

[0028] Figure 5It is a structural diagram of an embodiment of the utility model in which a fluorescent layer is not provided.

[0029] Figure 6 It is a top view of a substrate in one embodiment of the utility model.

[0030] Figure 7 It is a driving circuit diagram of an LED chip in one embodiment of the utility model.

[0031] Figure 8 The utility model is a flow chart of the preparation method of LED lamp beads.

[0032] The marks in the accompanying drawings are: 10, LED lamp bead; 101, substrate; 1011, first side; 1012, second side; 1013, first area; 1014, second area; 102, conductive electrode; 1021, positive electrode; 1022, negative electrode; 103, fluorescent layer; 104, heat dissipation part; 105, LED chip. DETAILED DESCRIPTION

[0033] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0034] In the embodiments and patent claims, unless the article is specifically limited in the text, "a", "an", "said" and "the" may also include plural forms. If there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0035] It should be further understood that the term "comprising" used in the specification of the present utility model refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or there can also be intermediate elements. In addition, the "connection" or "coupling" used here can include wireless connection or wireless coupling. The term "and / or" used here includes all or any unit and all combinations of one or more associated listed items.

[0036] Those skilled in the art will understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of ordinary technicians in the field to which the utility model belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as the meaning in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0037] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0038] LED (Light Emitting Diode) is an electroluminescent semiconductor material chip, which has the advantages of high luminous efficiency and long life. Therefore, LED is widely used in the field of lighting.

[0039] At present, in order to make flashlights, lamps, etc. have multiple light zones, multiple light-emitting zones are set on the substrate, and multiple LED lamp beads are set in each light-emitting zone as needed. By lighting up the LED lamp beads in different light zones, the light zones are switched to meet the lighting needs of different brightness. Among them, the device that can emit light in the LED lamp beads is called an LED chip, which is also called a light-emitting diode (LED) chip. Although this method can achieve the switching of multiple light zones, it requires multiple LED lamp beads to be set in each light zone during the setting, resulting in high costs. In addition, the setting of multiple lamp beads will also result in a large volume of the formed light source structure.

[0040] Regarding the problems of existing technologies, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the utility model provides an LED lamp bead 10 , which may include a substrate 101 , a conductive electrode 102 , a plurality of first regions 1013 and a fluorescent layer 103 . The substrate 101 includes a first side 1011 and a second side 1012 arranged opposite to the first side 1011; the conductive electrode 102 is arranged on the substrate 101 and located on the second side 1012; a plurality of first areas 1013 are annular areas, the plurality of first areas 1013 are arranged on the substrate 101 and located on the first side 1011, the positive projection contours of the plurality of first areas 1013 on the first side 1011 gradually decrease, and the plurality of first areas 1013 are arranged in sequence, each first area 1013 is provided with a plurality of LED chips 105, the LED chips 105 are connected to the conductive electrode 102, the light-emitting surfaces of the plurality of LED chips 105 are located away from the first side 1011, wherein each first area 1013 forms a light-emitting area; the fluorescent layer 103 is arranged on the substrate 101, and the fluorescent layer 103 is used to encapsulate the LED chips 105.

[0041] Specifically, Figure 1 - Figure 3 As shown, the substrate 101 may be, but is not limited to, a square substrate 101, in which the first side 1011 and the second side 1012 are two side surfaces of the square substrate 101 that are perpendicular to and opposite to the thickness direction of the square substrate 101. The conductive electrode 102 includes a positive electrode 1021 and a negative electrode 1022. When the conductive electrode 102 is provided, each first region 1013 is provided with a group of conductive electrodes 102 (a positive electrode 1021 and a negative electrode 1022 form a group of conductive electrodes 102).

[0042] When the LED chips 105 in each first region 1013 are connected to the conductive electrodes 102, the LED chips 105 in the first region 1013 can be connected to a group of conductive electrodes 102 in parallel or in series; of course, the LED chips 105 in different first regions 1013 can also be connected in series or in parallel, and the specific connection method can be determined by those skilled in the art according to actual needs. Figure 7 As shown, it is a circuit structure diagram in which the LED chips 105 in a first area 1013 are connected in parallel.

[0043] In this embodiment, the manner of connecting a plurality of LED chips 105 in series or in parallel can reduce the number of conductive electrodes 102 to be provided, and further make the structure of the LED lamp bead 10 more compact.

[0044] Among them, when the LED lamp bead 10 is lit, the LED chips 105 in one of the first areas 1013 can be lit, or the LED chips 105 in multiple first areas 1013 can be lit at the same time, for example, the LED chips 105 in two first areas 1013 can be lit at the same time; for example, the LED chips 105 in three first areas 1013 can be lit at the same time, etc. In this way, switching of different luminous brightness can be achieved.

[0045] Each time the LED chip 105 is lit, each time an LED chip 105 in the first area 1013 is lit, a lighting effect can be displayed, that is, different lighting effects are displayed through one LED lamp bead 10; each time the LED chip 105 is lit, after lighting an LED chip 105 in the first area 1013, another LED chip 105 in the first area 1013 can also be lit at the same time, so that high-brightness lighting that complements the irradiated areas can be achieved, that is, lighting of different brightness can be achieved through one LED lamp bead 10.

[0046] When the LED chips 105 are arranged, the total power of the LED chips 105 in each first area 1013 can also be made different, so that the LED chips 105 in different first areas 1013 can be lighted to achieve switching of different luminous brightness.

[0047] When the LED chips 105 are arranged, LED chips 105 with different powers may also be arranged in the same first area 1013 .

[0048] It can be seen that there are many ways to set the LED chip 105, that is, the setting method of the LED chip 105 can be determined according to actual needs, and no excessive restrictions are made here.

[0049] In this embodiment, the conductive electrode 102 may be a metal conductive electrode 102 . For example, the conductive electrode 102 may be made of, but not limited to, copper.

[0050] It can be seen that when the LED lamp bead 10 is used in a specific application and needs to switch the light-emitting area, the light-emitting area can be switched by lighting up the LED chip 105 in the first area 1013 corresponding to the light-emitting area to be switched; the light-emitting area can be switched by lighting up multiple LED chips 105 in the first area 1013 at the same time; instead of setting up several LED lamp beads 10 in each light-emitting area, the light-emitting area is switched by lighting up the LED lamp beads 10 in different light-emitting areas, thereby reducing the cost. In addition, in the technical solution of the utility model, multi-light-zone lighting can be achieved by one LED lamp bead 10 instead of multiple LED lamp beads 10, thereby forming a more compact light source structure.

[0051] In some embodiments, Figure 5 , Figure 6 As shown, a second region 1014 is further provided on the first side 1011 of the substrate 101 . The second region 1014 is located within the ring of the innermost first region 1013 among the plurality of first regions 1013 . The second region 1014 is provided with an LED chip 105 , which is connected to the conductive electrode 102 .

[0052] Specifically, an LED chip 105 may be arranged in the ring of the innermost first region 1013 among the plurality of first regions 1013, and in this case, the position where the LED chip 105 is arranged is the second region 1014. Of course, other multiple LED chips 105 may be arranged in the ring of the innermost first region 1013 among the plurality of first regions 1013, for example, two LED chips 105 may be arranged; for another example, three LED chips 105 may be arranged, wherein, when two LED chips 105 are arranged in the ring of the innermost first region 1013 among the plurality of first regions 1013, the position where the two LED chips 105 are arranged is the second region 1014; when two LED chips 105 are arranged in the ring of the innermost first region 1013 among the plurality of first regions 1013, the position where the LED chip 105 is arranged is the second region 1014.

[0053] Here, it should be noted that a group of conductive electrodes 102 connected to the LED chips 105 arranged in the second area 1014 are also arranged on the second side 1012 of the substrate 101 .

[0054] In a specific embodiment, an LED chip 105 is arranged in a ring of the innermost first area 1013 among a plurality of first areas 1013. When the first area 1013 is arranged, the LED chip 105 of the second area 1014 can be taken as the center, and a plurality of first areas 1013 can be arranged around the LED chip 105 of the second area 1014.

[0055] In some embodiments, Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, the LED lamp bead 10 further includes a heat dissipation portion 104 , which is disposed on the substrate 101 and located at the second side 1012 .

[0056] Specifically, the heat dissipation portion 104 may be a heat sink with a square structure. When the conductive electrode 102 is arranged, all positive electrodes 1021 in the conductive electrode 102 are arranged at one end of the second side 1012 of the substrate 101, and all negative electrodes 1022 in the conductive electrode 102 are arranged at the other end of the second side 1012 of the substrate 101 (the other end is opposite to the one end), and the heat dissipation portion 104 is arranged between the positive electrode 1021 and the negative electrode 1022.

[0057] In this embodiment, the heat dissipation portion 104 is disposed on the second side 1012 of the substrate 101 , and plays a role in dissipating heat when the LED lamp bead 10 is lit, thereby extending the service life of the LED lamp bead 10 .

[0058] In some embodiments, the first region 1013 may be a circular region, and a plurality of LED chips 105 in each circular region are distributed along the circumference of the circular region.

[0059] Specifically, a plurality of first regions 1013 can be set as a plurality of circular regions with successively decreasing inner diameters, wherein, when setting the plurality of first regions 1013, the LED chip 105 of the second region 1014 can be taken as the center, and a plurality of first regions 1013 (circular regions) can be set on the periphery of the LED chip 105 of the second region 1014, and the plurality of first regions 1013 (circular regions) can be nested in sequence.

[0060] In this embodiment, when the LED chips 105 are arranged, a plurality of LED chips 105 may be arranged in a distributed manner along the circumference of each annular region.

[0061] Furthermore, the first area 1013 may also be other annular structures. For example, the first area 1013 may also be an equilateral triangle annular area, wherein, when several first areas 1013 are set, the LED chip 105 of the second area 1014 is taken as the center, and several first areas 1013 (equilateral triangle annular areas) are set on the periphery of the LED chip 105 of the second area 1014, and several first areas 1013 (equilateral triangle annular areas) are arranged in sequence; for another example, the first area 1013 may also be a rectangular annular area, wherein, when several first areas 1013 are set, the LED chip 105 of the second area 1014 is taken as the center, and several first areas 1013 (rectangular annular areas) are set on the periphery of the LED chip 105 of the second area 1014, and several first areas 1013 (rectangular annular areas) are arranged in sequence.

[0062] In some embodiments, Figure 5As shown, the distance between any two adjacent chips in the same first area 1013 along the clockwise direction or the counterclockwise direction is equal to the distance between any two other adjacent chips in the same first area 1013 along the clockwise direction or the counterclockwise direction.

[0063] In this embodiment, since the distance between any two adjacent chips in the same first area 1013 along the clockwise direction or counterclockwise direction is equal to the distance between any other two adjacent chips in the same first area 1013 along the clockwise direction or counterclockwise direction, the LED lamp bead 10 has a simple and beautiful structure.

[0064] In some embodiments, the light density of all LED chips arranged in the second area is greater than the light density of all LED chips arranged in any of the first areas.

[0065] In this embodiment, the light density of all LED chips in the second area is greater than the light density of all LED chips in any first area, so that when the LED lamp bead is used, the light emitting range of the LED lamp bead can be increased, that is, the light intensity of the LED lamp bead is increased.

[0066] In some embodiments, the light density of the LED chips arranged in the first area gradually decreases from the inside to the outside.

[0067] In this embodiment, the light density of the LED chips arranged in the first area gradually decreases from the inside to the outside, which means that among the first areas, the light density of all the LED chips arranged in the innermost first area gradually decreases to the light density of the LED chips arranged in the outermost first area. The innermost circle refers to the first area of ​​the first area adjacent to the second area, and the outermost circle refers to the first area farthest from the second area.

[0068] Since the light density of the LED chips arranged in the first area gradually decreases from the inside to the outside, and the light density of the LED chips arranged in the second area is the largest, when using the LED lamp bead, the light emitting range of the LED lamp bead can be adjusted to gradually decrease.

[0069] In some embodiments, the utility model also provides a flashlight, which uses the above-mentioned LED lamp beads.

[0070] In some embodiments, the utility model further provides a lamp, which uses the above-mentioned LED lamp beads.

[0071] In some embodiments, Figure 8 As shown, the utility model also provides a method for preparing the above-mentioned LED lamp beads, which comprises the following steps:

[0072] S1. providing a substrate, wherein the substrate comprises a first side and a second side arranged opposite to the first side;

[0073] S2. Disposing a plurality of first regions on the first side of the substrate, wherein the plurality of first regions are annular regions, and the orthographic projection contours of the plurality of first regions on the first side gradually decrease, and the plurality of first regions are nested;

[0074] S4, disposing a plurality of LED chips in each first region, and the LED chips are connected to the conductive electrodes, and the light-emitting surfaces of the plurality of LED chips are away from the first side, wherein each first region forms a light-emitting area;

[0075] S5, disposing a conductive electrode on the second side of the substrate;

[0076] S6. Encapsulate a fluorescent layer on the LED chip, wherein the fluorescent layer is disposed on the substrate.

[0077] In this embodiment, a square substrate may be provided, in which the first side and the second side are two side surfaces of the square substrate that are perpendicular to and opposite to the thickness direction of the square substrate. First, a plurality of first regions are divided on the first side, and a plurality of LED chips are arranged in each first region, wherein the light-emitting surface of the LED chip is away from the first side; thereafter, a conductive electrode is arranged on the second side of the square substrate, and the conductive electrode includes a positive electrode and a negative electrode. When the conductive electrode is arranged, a group of conductive electrodes is arranged corresponding to each first region (a positive electrode and a negative electrode form a group of conductive electrodes), and the LED chip in each first region is connected to the conductive electrode, wherein when the LED chip in each first region is connected to the conductive electrode, the LED chip arranged in the first region can be connected to a group of conductive electrodes in parallel, or can be connected to a group of conductive electrodes in series; of course, the LED chips in different first regions can also be connected in series or in parallel, and the specific connection method can be determined by those skilled in the art according to actual needs.

[0078] When the LED lamp bead is lit, one of the LED chips in the first area can be lit, or multiple LED chips in the first area can be lit at the same time, for example, the LED chips in two first areas can be lit at the same time; for example, the LED chips in three first areas can be lit at the same time, etc. In this way, switching of different luminous brightness can be achieved.

[0079] Each time the LED chip is lit, each time an LED chip in the first area is lit, a lighting effect can be displayed, that is, different lighting effects can be displayed through one LED lamp bead; each time the LED chip is lit, after lighting an LED chip in the first area, another LED chip in the first area can also be lit at the same time, so that complementary high-brightness lighting of the irradiated areas can be achieved, that is, lighting of different brightness can be achieved through one LED lamp bead.

[0080] When the LED chips are arranged, the total power of the LED chips in each first area can also be different, so that the switching of different luminous brightness can be achieved by lighting up the LED chips in different first areas.

[0081] When the LED chips are arranged, LED chips with different powers may also be arranged in the same first area.

[0082] It can be seen that when the LED lamp bead is used in specific applications and it is necessary to switch the light-emitting area, the light-emitting area can be switched by lighting up the LED chip in the first area corresponding to the light-emitting area that needs to be switched; the light-emitting area can also be switched by lighting up multiple LED chips in the first area at the same time, instead of setting up several LED lamp beads in each light-emitting area, and switching the light-emitting area is achieved by lighting up LED lamp beads in different light-emitting areas. Therefore, the cost is reduced. In addition, in the technical solution of the utility model, multi-light-zone lighting can be achieved by one LED lamp bead, instead of multiple LED lamp beads. Therefore, the light source structure is more compact.

[0083] In some embodiments, Figure 8 As shown, in the step of arranging a plurality of LED chips in each first region, and the LED chips are connected to the conductive electrodes, and the light-emitting surfaces of the plurality of LED chips are away from the first side, wherein each first region forms a light-emitting area and the step of arranging the conductive electrodes on the second side of the substrate also includes the following steps:

[0084] S3, a second area is arranged on the first side of the substrate, the second area is located in the ring of the innermost first area among the plurality of first areas, wherein the second area is provided with an LED chip. The details are as described in the above embodiment of the LED lamp bead, which will not be described in detail here.

[0085] In some embodiments, Figure 8 As shown, after the step of encapsulating the fluorescent layer on the LED chip and arranging the fluorescent layer on the substrate, the step further includes:

[0086] S7, disposing a heat dissipation portion on the substrate, the heat dissipation portion being located at the second side. The details are as described in the above embodiment of the LED lamp bead, and will not be repeated here.

[0087] Here, it should be pointed out that the description of the above flashlight, lamp and LED lamp bead preparation method embodiment is similar to the description of the above LED lamp bead embodiment, and has similar beneficial effects as the above LED lamp bead. For technical details not disclosed in the flashlight, lamp and LED lamp bead preparation method embodiment of this embodiment, please refer to the description of the LED lamp bead embodiment of this utility model for understanding.

[0088] In summary, the utility model provides an LED lamp bead, a flashlight and a lamp, which have the following beneficial effects:

[0089] By setting a plurality of first areas on the substrate, and setting a plurality of LED chips in each first area, each first area forms a light-emitting area. In specific use, when it is necessary to switch the light-emitting area, the light-emitting area can be switched by lighting the LED chip in the first area corresponding to the light-emitting area to be switched. It can be seen that when setting a plurality of light-emitting areas, a plurality of first light-emitting areas are set in one LED lamp bead, and a plurality of LED chips are set in each light-emitting area, instead of setting a plurality of LED lamp beads in each light-emitting area. Therefore, the cost is reduced. In addition, in the technical solution of the utility model, multi-light-zone lighting can be achieved by one LED lamp bead, instead of multiple LED lamp beads. Therefore, the volume of the light source structure is more compact.

[0090] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the utility model. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should belong to the scope covered by the claims of the utility model.

Claims

1. An LED lamp bead, characterized in that: include: a substrate, the substrate comprising a first side and a second side disposed opposite to the first side; a conductive electrode, disposed on the substrate and located on the second side; A plurality of first regions, wherein the plurality of first regions are annular regions, the plurality of first regions are arranged on the substrate and located on the first side, the orthographic projection contours of the plurality of first regions on the first side gradually decrease, and the plurality of first regions are arranged in a nested manner, each of the first regions is provided with a plurality of LED chips and connected to the conductive electrode, and the light-emitting surfaces of the plurality of LED chips are located away from the first side; A fluorescent layer is disposed on the substrate and is used to encapsulate the LED chip.

2. The LED lamp bead according to claim 1, characterized in that: Also includes: A second region, wherein the second region is arranged on the first side of the substrate and is located within the ring of the innermost first region among the plurality of first regions, wherein the LED chip is arranged in the second region.

3. The LED lamp bead according to claim 1, characterized in that: Also includes: A heat dissipation portion is disposed on the substrate and located at the second side.

4. The LED lamp bead according to any one of claims 1 to 3, characterized in that: The first area is a circular area, and the plurality of LED chips in each circular area are distributed along the circumference of the circular area.

5. The LED lamp bead according to claim 4, characterized in that: The distance between any two adjacent chips in the same first region along the clockwise direction or the counterclockwise direction is equal to the distance between any other two adjacent chips in the same first region along the clockwise direction or the counterclockwise direction.

6. The LED lamp bead according to claim 2, characterized in that: The light density of all the LED chips arranged in the second area is greater than the light density of all the LED chips arranged in any one of the first areas.

7. The LED lamp bead according to claim 6, characterized in that: The light density of the LED chips arranged in the first area gradually decreases from the inside to the outside.

8. A flashlight, characterized in that: The flashlight comprises the LED lamp bead as described in any one of claims 1 to 7.

9. A lamp, characterized in that: The lamp comprises the LED lamp bead as described in any one of claims 1 to 7.

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