LED light source system

Abstract

The utility model discloses an LED light source system which comprises a light source substrate, a plurality of LED luminous bodies arranged on the light source substrate in an array mode, a collimating lens assembly arranged in the light emitting direction of the LED luminous bodies and a light emitting lens, more than 50% of the LED luminous bodies are partition type LED units with light emitting face partitions, and each partition type LED unit comprises a light emitting area and an electrode set. The light-emitting area at least comprises a first light-emitting area and a second light-emitting area approximately surrounding the first light-emitting area, the electrode sets are located on the side where the light-emitting face of the light-emitting area is located, the electrode sets comprise first electrode sets used for controlling the first light-emitting area and second electrode sets used for controlling the second light-emitting area, and the first electrode sets are connected in series. And the plurality of second electrode groups are connected in series. According to the LED light source system, the uniformity of light spots can be adjusted under the condition that the power and the total light output amount are basically unchanged, and therefore the light spots with various light intensity distributions can be emitted according to actual needs.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical technology field, more specifically, relate to a LED light source system. BACKGROUND

[0002] Stage lighting is an important part of stage performance, which designs the light of all-round visual environment according to the development of plot, characters and required specific scene, creates environment, renders atmosphere, highlights the central character, creates stage space sense, time sense, and reproduces the design intention to the audience in the form of visual image. The effect of stage lighting is realized by stage lighting equipment, and the stage light source module is the core element of stage light equipment, which plays a decisive role in stage light effect. The structure of the high-power stage light source module on the market usually includes LED light emitters arranged in an array, collimating lens structures, uniform light optical structures and light-emitting lenses arranged in sequence along the light-emitting direction of the LED light emitters. Most high-power stage lamps want to achieve different stage lamp effects, and the method is to set optical elements such as light adjusting sheet, CMY sheet, pattern sheet, color sheet and atomizing sheet on the subsequent light path of the stage light source module to process the light emitted by the light source, but the change effect of such optical elements is limited and also causes light loss to different degrees. In the past two years, the market has launched a switchable dual-mode light source module, which includes high-visibility LED units and high-brightness LED units, and sets adjusting structure to adjust the relative position of the collimating lens structure and the LED light emitter, so that the collimating lens structure can be aligned with different LED units, realizing the switching of high-visibility and high-brightness two modes, but its function effect is still limited. In addition, the stage light source products on the market cannot realize the regulation of light intensity distribution, and if the adjustment of spot uniformity can be realized under the premise of ensuring consistent power and light output, it will have great significance for the development of stage lamps. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at overcoming at least one of the defects of the prior art, and provides a LED light source system, which can realize the adjustment of spot uniformity under the condition that the power and total light output are basically unchanged, so that various light intensity distribution spots can be obtained according to actual needs, greatly enriching the light output effect.

[0004] The technical scheme adopted by the utility model is:

[0005] An LED light source system, comprising a light source substrate, a plurality of LED light emitters arranged in an array on the light source substrate, a collimating lens assembly arranged in the light emitting direction of the LED light emitters, and a light emitting lens, more than 50% of the LED light emitters are partitioned LED units with partitioned light emitting surfaces, the partitioned LED unit comprises a light emitting area and an electrode group, the light emitting area comprises at least a first light emitting area and a second light emitting area arranged around the first light emitting area, the bottom of the partitioned LED unit is a substrate, the first light emitting area and the second light emitting area share the same substrate, the electrode group is located on the side of the light emitting surface of the light emitting area, the electrode group comprises at least a first electrode group for controlling the first light emitting area and a second electrode group for controlling the second light emitting area, a plurality of the first electrode groups are connected in series and driven and controlled by a first current, a plurality of the second electrode groups are connected in series and driven and controlled by a second current, the first current and the second current are independent of each other.

[0006] In one embodiment, the gap distance between the first light emitting area and the second light emitting area is less than 0.1 mm.

[0007] In one embodiment, the first light emitting area is a circular light emitting area, and the second light emitting area is an annular light emitting area; or the first light emitting area is a rectangular light emitting area, and the second light emitting area is a back-shaped light emitting area.

[0008] In one embodiment, the area ratio of the first light emitting area to the second light emitting area is (0.5-2):1.

[0009] In one embodiment, the area of the first light emitting area is S1, the area of the second light emitting area is S2, the current value of the first current is I1, and the current value of the second current is I2, under the condition that the total power is basically constant, S1, S2, I1, and I2 satisfy:

[0010] When , the partitioned LED unit is a uniform LED chip, and the ratio of the light emitting intensity of the first light emitting area to the light emitting intensity of the second light emitting area is 0.85-1.15;

[0011] When , the partitioned LED unit is a bright center LED chip, and the ratio of the light emitting intensity of the first light emitting area to the light emitting intensity of the second light emitting area is greater than or equal to 1.25;

[0012] When , the partitioned LED unit is a dark center LED chip, and the ratio of the light emitting intensity of the first light emitting area to the light emitting intensity of the second light emitting area is less than or equal to 0.75.

[0013] In one embodiment, the area ratio of the first light emitting region and the second light emitting region is (0.5-0.55):1, when the partitioned LED unit is a uniform LED chip; when the partitioned LED unit is a bright center LED chip; and when the partitioned LED unit is a dark center LED chip.

[0014] In one embodiment, the area ratio of the first light emitting region and the second light emitting region is (0.7-0.8):1, when the partitioned LED unit is a uniform LED chip; when the partitioned LED unit is a bright center LED chip; and when the partitioned LED unit is a dark center LED chip.

[0015] In one embodiment, the area ratio of the first light emitting region and the second light emitting region is (0.9-1.1):1, when the partitioned LED unit is a uniform LED chip; when the partitioned LED unit is a bright center LED chip; and when the partitioned LED unit is a dark center LED chip.

[0016] In one embodiment, the area ratio of the first light emitting region and the second light emitting region is (1.2-1.3):1, when the partitioned LED unit is a uniform LED chip; when the partitioned LED unit is a bright center LED chip; and when the partitioned LED unit is a dark center LED chip.

[0017] In one embodiment, the area ratio of the first light emitting region and the second light emitting region is (1.4-1.6):1, when the partitioned LED unit is a uniform LED chip; when the partitioned LED unit is a bright center LED chip; and when the partitioned LED unit is a dark center LED chip.

[0018] In one embodiment, the area ratio of the first light emitting region and the second light emitting region is (1.8-2):1, when the partitioned LED unit is a uniform LED chip; when the partitioned LED unit is a bright center LED chip; and when In some embodiments, the partitioned LED unit is a dark-core LED chip.

[0019] In some embodiments, the light emitting region further comprises a third light emitting region, the third light emitting region is located between the first light emitting region and the second light emitting region, and the area ratio of the first light emitting region, the third light emitting region and the second light emitting region is (0.5-2):(0.5-2):1.

[0020] In some embodiments, the LED light source system further comprises a light mixing element, the light mixing element is located between the collimating lens assembly and the light emitting lens along the light emitting direction of the LED light emitter.

[0021] In some embodiments, the light mixing element is a single piece compound eye lens, a double piece opposing compound eye lens or a diffusion sheet.

[0022] In some embodiments, more than 80% of the LED light emitters are partitioned LED units with partitioned light emitting surfaces, the area of the first light emitting region is S1, the area of the second light emitting region is S2, the current value of the first current is I1, and the current value of the second current is I2, and S1, S2, I1 and I2 satisfy: the LED light source system obtains a bright center light spot with a bright center and a dark edge in the focal plane of the light emitting lens; and / or the LED light source system obtains a uniform light spot in the focal plane of the light emitting lens.

[0023] In some embodiments, the light source substrate is a copper substrate and a plurality of ceramic substrates arranged on the copper substrate, the partitioned LED units are arranged on the ceramic substrates, the upper and lower surfaces of the ceramic substrates are provided with circuit layers, the circuit layers in the same horizontal direction comprise a first circuit region, a second circuit region, a third circuit region, a fourth circuit region and a fifth circuit region which are spaced apart and insulated from each other, and the fifth circuit region in the horizontal direction is located in the middle region of the circuit layer, the ceramic substrate is provided with a conductive hole penetrating the upper and lower surfaces, the conductive hole penetrates the first circuit region, the second circuit region, the third circuit region and the fourth circuit region, the circuit layers on the upper and lower surfaces of the ceramic substrate are electrically connected through the conductive hole, the substrate is arranged on the fifth circuit region of the upper surface, the surface of the circuit layer on the upper surface is further provided with a metal layer, and the electrode group is connected to the metal layer through gold wires.

[0024] In one of the embodiments, the light source substrate is a copper substrate, the copper substrate is a boss structure provided with a plurality of protrusions, the partitioned LED unit is arranged on the protrusions, the upper surface of the copper substrate is provided with a circuit layer, the circuit layer includes four circuit areas arranged in horizontal direction and / or insulated in vertical direction, and a metal layer is arranged above the circuit layer, and the electrode group and the metal layer are connected by gold wires.

[0025] In one of the embodiments, the first electrode group and the second electrode group each include a positive electrode and a negative electrode; the first light emitting area includes, from top to bottom, a first semiconductor layer, a first active layer, a second semiconductor layer, an insulating layer and a substrate, and a first conductive layer and a second conductive layer in ohmic contact with the first semiconductor layer and the second semiconductor layer respectively; the second light emitting area includes, from top to bottom, a third semiconductor layer, a second active layer, a fourth semiconductor layer, an insulating layer and a substrate, and a third conductive layer and a fourth conductive layer in ohmic contact with the third semiconductor layer and the fourth semiconductor layer respectively, the first conductive layer, the second conductive layer, the third conductive layer and the fourth conductive layer are insulated from each other and arranged in spatial dislocation, and the first conductive layer and the second conductive layer are connected with the two electrodes of the first electrode group, and the third conductive layer and the fourth conductive layer are connected with the two electrodes of the second electrode group.

[0026] Compared with the prior art, the technical scheme has the beneficial effects that: a plurality of LED light emitting bodies arranged in an array are arranged on the light source substrate, and more than 50% of the LED light emitting bodies are partitioned LED units with partitioned light emitting surfaces, each partitioned LED unit includes at least two light emitting areas and two electrode groups for controlling the two light emitting areas, the electrode groups for controlling the same partition of different partitioned LED units are arranged in series, the same light emitting area of the plurality of partitioned LED units can be driven and controlled by the same current, the same light emitting area of the plurality of partitioned LED units is connected in series, all the same light emitting areas can be controlled by one current, two currents supplied to the light source substrate can be used to control the two light emitting areas of the plurality of partitioned LED units, and the adjustment of the light emitting effect of different light emitting areas can be realized, a large number of light spots with different light intensity distributions can be obtained, when the light emitting areas of the partitioned LED units are divided into more regions, the number of electrode groups and driving currents can be increased accordingly; the electrode groups are located on the side of the light emitting surface of the light emitting area, and the electrode groups are located on the upper surface of the LED light emitting unit, which can facilitate the separation of heat and electricity and improve the heat dissipation effect; in addition, the inner and outer partitioning of different light emitting areas can be more conducive to the adjustment of the uniformity of the light spot. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 The exploded view of the LED light source system of Example 1.

[0028] Figure 2This is an assembly diagram of the LED light source system in Example 1.

[0029] Figure 3 This is an assembly diagram of the light source substrate and LED light emitter in Example 1.

[0030] Figure 4 This is an assembly diagram of the ceramic substrate and the partitioned LED unit in Example 1.

[0031] Figure 5 for Figure 4 Front view.

[0032] Figure 6 This is a front view of a zoned LED unit.

[0033] Figure 7 This is a schematic diagram of another partitioning method in the embodiment.

[0034] Figure 8 This is a schematic diagram of another partitioning method in the embodiment.

[0035] Figure 9 This is a structural diagram of a ceramic substrate.

[0036] Figure 10 This is a front view of the ceramic substrate.

[0037] Figure 11 This is a rear view of the ceramic substrate.

[0038] Figure 12 for Figure 6 A cross-sectional view at position AA.

[0039] Figure 13 for Figure 7 A sectional view.

[0040] Figure 14 This is an assembly diagram of the light source substrate and LED light emitter in Example 2.

[0041] Figure 15 for Figure 14 A magnified view of region C.

[0042] Figure 16 This is a diagram showing the arrangement of LED light-emitting elements in Example 3.

[0043] Figure 17 for Figure 16 A magnified view of a portion of region D.

[0044] Explanation of reference numerals: 11, copper substrate; 12, ceramic substrate; 1211, first circuit area; 1212, second circuit area; 1213, third circuit area; 1214, fourth circuit area; 1215, fifth circuit area; 2, LED light emitter; 21, partitioned LED unit; 211, light emitting area; 2111, first light emitting area; 2112, second light emitting area; 2121, first electrode group; 2122, second electrode group; 213, substrate; 201, first semiconductor layer; 202, first active layer; 203, second semiconductor layer; 204, insulating layer; 205, first conductive layer; 206, second conductive layer; 207, third semiconductor layer; 208, second active layer; 209, fourth semiconductor layer; 2010, third conductive layer; 2011, fourth conductive layer; 22, non-partitioned LED unit; 3, collimating lens assembly; 31, collimating lens support; 32, first collimating lens; 321, first lenslet; 33, second collimating lens; 4, light mixing optical element; 5, light exit lens; 6, gold wire; 7, housing. DETAILED DESCRIPTION

[0045] The drawings of the utility model are only used for exemplary illustration, and cannot be understood as the limitation of the utility model. In order to better illustrate the following embodiments, some components of the drawings can be omitted, enlarged or reduced, and the size of actual products is not represented; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings can be omitted.

[0046] Embodiment 1

[0047] As shown in Figure 1 , Figure 2 , the embodiment 1 discloses an LED light source system, which comprises a light source substrate, a plurality of LED light emitters 2 arranged in an array on the light source substrate, a collimating lens assembly 3 arranged in the light emitting direction of the LED light emitter 2 and a light exit lens 5, as shown in Figures 3 to 6 and Figure 12 , Figure 13As shown, all the LED light emitters 2 in the embodiment are partitioned LED units 21 with partitioned light emitting surfaces, the partitioned LED units 21 include a light emitting area 211 and an electrode group, the light emitting area 211 includes at least a first light emitting area 2111 and a second light emitting area 2112 arranged around the first light emitting area 2111, the first light emitting area 2111 and the second light emitting area 2112 share the same substrate 213, the electrode group is located on the side of the light emitting surface of the light emitting area 211, the electrode group includes at least a first electrode group 2121 for controlling the first light emitting area 2111 and a second electrode group 2122 for controlling the second light emitting area 2112, a plurality of the first electrode groups 2121 are connected in series and driven by a first current, a plurality of the second electrode groups 2122 are connected in series and driven by a second current, the first current and the second current are independent of each other.

[0048] The light source substrate in the embodiment is provided with a plurality of LED light emitters 2, the LED light emitters 2 are partitioned LED units 21 with partitioned light emitting surfaces, the partitioned LED units 21 include a first light emitting area 2111 and a second light emitting area 2112, the electrode group includes a first electrode group 2121 for controlling the first light emitting area 2111 and a second electrode group 2122 for controlling the second light emitting area 2112, a plurality of the first electrode groups 2121 are connected in series and driven by a first current, a plurality of the second electrode groups 2122 are connected in series and driven by a second current, then the same light emitting area of a plurality of different partitioned LED units 21 can be controlled by the same current, different light emitting areas can be driven and controlled by different currents, the adjustment of spot uniformity can be realized, and since the first light emitting area and the second light emitting area share the same substrate, the two areas can be very close, the light efficiency is higher, and the overall driving current can be reduced, which is more conducive to the improvement of driving energy efficiency. In addition, since the spot formed by the LED chip after passing through the lens is centrally symmetric, the light emitting area 211 arranged in the form of inner and outer partitions including the first light emitting area 2111 and the second light emitting area 2112 arranged around the first light emitting area 2111 can be more conducive to the adjustment of spot uniformity. The electrode group is located on the side of the light emitting surface of the light emitting area 211, that is, the light emitting surface of the light emitting area and the electrode group are both located on the surface of the partitioned LED unit 21, which is convenient for thermoelectric separation and control.

[0049] Further, the driving control of the first current and the second current is controlled by adjusting the period and / or duty cycle of the pulse width.

[0050] Further, the gap distance between the first light emitting area 2111 and the second light emitting area 2112 is less than 0.1 mm, and more specifically, the gap distance between the first light emitting area 2111 and the second light emitting area 2112 in the embodiment is 0.02-0.05 mm. The smaller the gap distance between the first light emitting area 2111 and the second light emitting area 2112, the better the light spots emitted by different light emitting areas connect with each other when the first light emitting area 2111 and the second light emitting area 2112 are lit at the same time, and the light spot effect has no visual gap.

[0051] Further, the first light emitting area 2111 in the embodiment is a circular light emitting area, and the second light emitting area 2112 is an annular light emitting area. In other embodiments, the light emitting area can also be other partitioned ways, such as the first light emitting area being rectangular and the second light emitting area being a back-shaped type. It can also be other inner-outer partitioned ways, which will not be enumerated one by one here.

[0052] It is worth mentioning that the light emitting area 211 in the application at least includes the first light emitting area 2111 and the second light emitting area 2112 arranged around the first light emitting area 2111, which means that the second light emitting area 2112 is visually arranged around the first light emitting area 2111, and it does not require that the first light emitting area 2111 is completely inside and the second light emitting area 2112 is completely outside in a strict sense, such as the case shown in Figure 7 、 Figure 8 which also belongs to the second light emitting area 2112 generally surrounding the first light emitting area 2111. Other partitioned ways in which the first light emitting area 2111 is visually inside and the second light emitting area 2112 is visually outside also belong to the protection scope of the application, which will not be enumerated one by one here.

[0053] Specifically, the embodiment takes the case that the light emitting area 211 only includes the first light emitting area 2111 and the second light emitting area 2112 as an example, that is, the case that the light emitting area 211 only includes two light emitting areas. In its embodiments, the light emitting area 211 can also include three light emitting areas, four light emitting areas, or even more light emitting areas.

[0054] Further, the light mixing optical element in the embodiment is a uniform light diffusion sheet 4. In other embodiments, the light mixing element can also be a single piece of compound eye lens or a double piece of opposing compound eye lens.

[0055] Furthermore, in this embodiment, the collimating lens assembly includes a collimating lens support 31 and a first collimating lens 32 and a second collimating lens 33 disposed on the collimating lens support 31. The collimating lens support 31 has a plurality of through holes 311. The first collimating lens includes a plurality of first microlenses 321 disposed within the through holes 311. The second collimating lens 33 is integrally formed from a plurality of microlens units, i.e., the second collimating lens 33 is a lens array structure. The first microlenses 321 of the first collimating lens 32 and the microlens units of the second collimating lens 33 correspond one-to-one.

[0056] Furthermore, let the area of ​​the first light-emitting region be S1, the area ratio of the second light-emitting region be S2, the current value of the first path current be I1, the current value of the second path current be I2, and x = The ratio of the luminous intensity of the first luminous region and the luminous intensity of the second luminous region of the partitioned LED unit is y. Under the condition that the total power is basically constant, x and y satisfy:

[0057] .

[0058] During the research and development process, it was discovered that the area ratio and current ratio of different light-emitting areas of the partitioned LED unit have the above-mentioned exponential relationship with the luminous intensity of different light-emitting areas.

[0059] Luminous intensity is the luminous flux per unit area.

[0060] Furthermore, under the condition that the total power is basically constant, S1, S2, I1, and I2 satisfy:

[0061] when When the partitioned LED unit 21 is a uniform LED chip, the ratio of the luminous intensity of the first luminous region 2111 to the luminous intensity of the second luminous region 2112 is 0.85 to 1.15.

[0062] when When the partitioned LED unit 21 is a bright core LED chip, the ratio of the luminous intensity of its first luminous area 2111 to the luminous intensity of its second luminous area 2112 is greater than or equal to 1.25.

[0063] when When the partitioned LED unit 21 is a dark core LED chip, the ratio of the luminous intensity of its first luminous region 2111 to the luminous intensity of its second luminous region 2112 is less than or equal to 0.75.

[0064] By controlling the area ratio of different light-emitting areas and the current size ratio of different road currents, the light intensity distribution uniformity of the LED unit can be controlled. When the area ratio of the light-emitting areas and the current size ratio of the different road currents are close, the light-emitting intensity difference between the first light-emitting area 2111 and the second light-emitting area 2112 of the partitioned LED unit 21 is small, which is a uniform LED chip with uniform light-emitting intensity. When the area ratio of the light-emitting areas and the current size ratio of the different road currents are close, the light-emitting intensity difference between the first light-emitting area 2111 and the second light-emitting area 2112 of the partitioned LED unit 21 is small, which is a uniform LED chip with uniform light-emitting intensity. The smaller the ratio is, the greater the light-emitting intensity of the first light-emitting area 2111 is, and the smaller the light-emitting intensity of the second light-emitting area 2112 is, which is a bright center LED chip, and the smaller the value is, the brighter the center is. Specifically, The smaller the ratio is, the greater the light-emitting intensity of the first light-emitting area 2111 is, and the smaller the light-emitting intensity of the second light-emitting area 2112 is, which is a bright center LED chip, and the smaller the value is, the brighter the center is. Specifically, The greater the ratio is, the smaller the light-emitting intensity of the first light-emitting area 2111 is, and the greater the light-emitting intensity of the second light-emitting area 2112 is, which is a dark center LED chip. Specifically, The greater the ratio is, the smaller the light-emitting intensity of the first light-emitting area 2111 is, and the greater the light-emitting intensity of the second light-emitting area 2112 is, which is a dark center LED chip. Specifically,

[0065] Further, taking the area ratio of the first light-emitting area 2111 and the second light-emitting area 2112 as (0.5-0.55):1 as an example, when , the partitioned LED unit 21 is a uniform LED chip; when , the partitioned LED unit 21 is a bright center LED chip; and when , the partitioned LED unit 21 is a dark center LED chip.

[0066] More specifically, when the area ratio of the first light-emitting area 2111 and the second light-emitting area 2112 is 0.5:1, i.e. S1 / S2=0.5:1, the measured data of the optical effect is shown in Table 1. Wherein, I1 represents the current value of the first road current, i.e. the value of the current driving the first light-emitting area 2111, I2 represents the current value of the second road current, i.e. the value of the current driving the second light-emitting area 2112, U1, P1, L1 represent the voltage, power and luminous flux of the first light-emitting area 2111 respectively, U2, P2, L2 represent the voltage, power and luminous flux of the second light-emitting area 2112 respectively, and the light intensity ratio is , wherein y is the light intensity ratio, and x= .

[0067] Table 1

[0068]

[0069] Further, taking the area ratio of the first light-emitting area 2111 and the second light-emitting area 2112 as (0.7-0.8):1 as an example; when When the area ratio of the first light emitting area 2111 and the second light emitting area 2112 is 0.75:1, i.e. S1 / S2=0.75:1, the data is shown in Table 2. From the data in Table 2, it can be seen that:

[0070] More specifically, when the area ratio of the first light emitting area 2111 and the second light emitting area 2112 is 0.75:1, i.e. S1 / S2=0.75:1, the data is shown in Table 2. From the data in Table 2, it can be seen that: wherein y is the light intensity ratio, x= .

[0071] Table 2

[0072]

[0073] Further, taking the area ratio of the first light emitting area 2111 and the second light emitting area 2112 as (0.9-1.1):1 as an example, when the partitioned LED unit 21 is a uniform LED chip; when the partitioned LED unit 21 is a bright center LED chip; and when the partitioned LED unit 21 is a dark center LED chip.

[0074] More specifically, when the area ratio of the first light emitting area 2111 and the second light emitting area 2112 is 1:1, i.e. S1 / S2=1:1, the data is shown in Table 3. From the data in Table 3, it can be seen that: wherein y is the light intensity ratio, x= .

[0075] Table 3

[0076]

[0077] Further, taking the area ratio of the first light emitting area 2111 and the second light emitting area 2112 as (1.2-1.3):1 as an example, when the partitioned LED unit 21 is a uniform LED chip; when the partitioned LED unit 21 is a bright center LED chip; and when the partitioned LED unit 21 is a dark center LED chip.

[0078] ​​​​More specifically, when the area ratio of the first light emitting area 2111 and the second light emitting area 2112 is 1.25:1, i.e. S1 / S2=1.25:1, the data is shown in Table 4. It can be seen from the data in Table 4 that it satisfies: , wherein y is the light intensity ratio, x= .

[0079] Table 4

[0080]

[0081] Further, taking the area ratio of the first light emitting area 2111 and the second light emitting area 2112 as (1.4-1.6):1 as an example, when , the partitioned LED unit 21 is a uniform LED chip; when , the partitioned LED unit 21 is a bright center LED chip; and when , the partitioned LED unit 21 is a dark center LED chip.

[0082] More specifically, when the area ratio of the first light emitting area 2111 and the second light emitting area 2112 is 1.5:1, i.e. S1 / S2=1.5:1, the data is shown in Table 5. It can be seen from the data in Table 5 that it satisfies: , wherein y is the light intensity ratio, x= .

[0083] Table 5

[0084]

[0085] Further, taking the area ratio of the first light emitting area 2111 and the second light emitting area 2112 as (1.8-2):1 as an example, when , the partitioned LED unit 21 is a uniform LED chip; when , the partitioned LED unit 21 is a bright center LED chip; and when , the partitioned LED unit 21 is a dark center LED chip.

[0086] More specifically, when the area ratio of the first light emitting area 2111 and the second light emitting area 2112 is 2:1, i.e. S1 / S2=2:1, the data is shown in Table 6. It can be seen from the data in Table 6 that it satisfies: , wherein y is the light intensity ratio, x= .

[0087] Table 6

[0088]

[0089] Further, as Figures 3 to 6 and Figures 9 to 11 shown, the light source substrate of the embodiment is a copper substrate 11 and a plurality of ceramic substrates 12 arranged on the copper substrate 11, the partitioned LED unit 21 is arranged on the ceramic substrate 12, the upper and lower surfaces of the ceramic substrate 12 are provided with a circuit layer, the same horizontal direction of the circuit layer includes a first circuit area 1211, a second circuit area 1212, a third circuit area 1213, a fourth circuit area 1214 and a fifth circuit area 1215 which are spaced apart and insulated, and the horizontal direction of the fifth circuit 1215 area is located in the middle area of the circuit layer 121, the ceramic substrate 12 is provided with a conductive hole 101 which penetrates from top to bottom, the conductive hole 101 penetrates the first circuit area 1211, the second circuit area 1212, the third circuit area 1213, the fourth circuit area 1214, and the circuit layer 121 on the upper and lower surfaces is electrically connected through the conductive hole 101, the substrate 213 is arranged on the fifth circuit area 1215 on the upper surface, and the surface of the circuit layer on the upper surface is also provided with a metal layer, and the electrode group is connected with the metal layer through a gold wire 6.

[0090] Further, the first electrode group 2121 and the second electrode group 2122 of the embodiment each include a positive electrode and a negative electrode; as Figure 6 , Figure 12 , Figure 13 shown, the first light emitting area 2111 includes a first semiconductor layer 201, a first active layer 202, a second semiconductor layer 203, an insulating layer 204 and a substrate 213 from top to bottom, and further includes a first conductive layer 205 and a second conductive layer 206 which are in ohmic contact with the first semiconductor layer 201 and the second semiconductor layer 203 respectively; the second light emitting area 2112 includes a third semiconductor layer 207, a second active layer 208, a fourth semiconductor layer 209, an insulating layer 204 and a substrate 213 from top to bottom, and further includes a third conductive layer 2010 and a fourth conductive layer 2011 which are in ohmic contact with the third semiconductor layer 207 and the fourth semiconductor layer 209 respectively, the first conductive layer 205, the second conductive layer 206, the third conductive layer 2010 and the fourth conductive layer 2011 are insulated from each other and arranged in space, and the first conductive layer 205 and the second conductive layer 206 are connected with the two electrodes of the first electrode group 2121, and the third conductive layer 2010 and the fourth conductive layer 2011 are connected with the two electrodes of the second electrode group 2122.

[0091] Further, the LED light source system further includes a shell 7, and the light emitting lens 5 is arranged on the shell 7.

[0092] When S1, S2, I1, I2 satisfy: , the LED light source system in the embodiment obtains a bright center light spot with a middle bright edge and a dark edge in the focal plane of the light emitting lens 5; when , the LED light source system obtains a uniform light spot in the focal plane of the light emitting lens 5. When , a uniform light spot can be obtained.

[0093] Embodiment 2

[0094] The embodiment 2 discloses an LED light source system, which comprises a light source substrate, a plurality of LED light emitters 2 arranged in an array on the light source substrate, a collimating lens assembly 3 arranged in the light emitting direction of the LED light emitters 2, a light mixing optical element 4, and a light emitting lens 5. In the embodiment, all the LED light emitters 2 are partitioned LED units 21 with partitioned light emitting surfaces. The partitioned LED unit 21 comprises a light emitting area 211 and an electrode group. The light emitting area 211 comprises at least a first light emitting area 2111 and a second light emitting area 2112 arranged around the first light emitting area 2111. The bottom of the partitioned LED unit 21 is a substrate 213. The first light emitting area 2111 and the second light emitting area 2112 share the same substrate 213. The electrode group is located on the side of the light emitting surface of the light emitting area 211. The electrode group comprises a first electrode group 2121 for controlling the first light emitting area 2111 and a second electrode group 2122 for controlling the second light emitting area 2112. A plurality of the first electrode groups 2121 are connected in series and driven and controlled by a first current. A plurality of the second electrode groups 2122 are connected in series and driven and controlled by a second current. As shown in Figure 14 , Figure 15 , the light source substrate in the embodiment is a copper substrate 11. The copper substrate 11 is a boss type structure with a plurality of protrusions. The partitioned LED unit 21 is arranged on the protrusions. The upper surface of the copper substrate 11 is provided with a circuit layer. The circuit layer comprises four circuit areas arranged in a horizontal direction and / or insulated in a vertical direction. A metal layer is arranged above the circuit areas. The electrode group is connected to the metal layer through gold wires 6.

[0095] The difference between the embodiment 2 and the embodiment 1 is only the light source substrate. The light source substrate in the embodiment is a copper substrate. The copper substrate is a boss type structure with a plurality of protrusions. The substrate 213 of the partitioned LED unit 21 is arranged on the protrusions. The other structures and working principles are similar to those of the embodiment 1, which will not be described here.

[0096] Embodiment 3

[0097] The embodiment 3 discloses an LED light source system, which comprises a light source substrate, a plurality of LED light emitters 2 arranged in an array on the light source substrate, a collimating lens assembly 3 arranged in the light emitting direction of the LED light emitters 2, a light mixing optical element 4 and a light emitting lens 5, as shown in Figure 16 、 Figure 17 In the embodiment, part (about 78%) of the LED light emitters 2 are partitioned LED units 21, and the rest (about 22%) of the LED light emitters 2 are non-partitioned LED units 22. The partitioned LED unit 21 comprises a light emitting area 211 and an electrode group. The light emitting area 211 at least comprises a first light emitting area 2111 and a second light emitting area 2112 arranged around the first light emitting area 2111. The bottom of the partitioned LED unit 211 is a substrate 213. The first light emitting area 2111 and the second light emitting area 2112 share the same substrate 213. The electrode group 212 is located on the side of the light emitting surface of the light emitting area 211. The electrode group 212 comprises a first electrode group 2121 for controlling the first light emitting area 2111 and a second electrode group 2122 for controlling the second light emitting area 2112. A plurality of the first electrode groups 2121 are connected in series and driven and controlled by a first current. A plurality of the second electrode groups 2122 are connected in series and driven and controlled by a second current.

[0098] The difference between the embodiment and the embodiment 1 is that the embodiment comprises part of non-partitioned LED units 22 in addition to the partitioned LED units. In practical applications, part of the LED units can not be partitioned. When the partitioned LED units account for a larger proportion, the light intensity distribution can also be better controlled. The other structures are similar to those of the embodiment 1, and details are not described herein.

[0099] Obviously, the above embodiments of the utility model are only examples for clearly explaining the technical scheme of the utility model, and are not a limitation on the specific embodiments of the utility model. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model claim should be included in the protection scope of the utility model claim.

Claims

1. An LED light source system, comprising a light source substrate, a plurality of LED light emitters arranged in an array on the light source substrate, a collimating lens assembly arranged in a light emitting direction of the LED light emitters, and a light emitting lens, characterized in that, 50% or more of the LED light emitters are partitioned LED units, the partitioned LED units comprise light emitting areas and electrode groups, the light emitting areas comprise at least a first light emitting area and a second light emitting area arranged around the first light emitting area, the partitioned LED units have a substrate at the bottom, the first light emitting area and the second light emitting area share the same substrate, the electrode groups are arranged on the side of the light emitting areas, the electrode groups comprise at least a first electrode group for controlling the first light emitting area and a second electrode group for controlling the second light emitting area, a plurality of the first electrode groups are connected in series and driven by a first current, a plurality of the second electrode groups are connected in series and driven by a second current, the first current and the second current are independent of each other.

2. The LED light source system of claim 1, wherein, The gap distance between the first light emitting area and the second light emitting area is less than 0.1 mm.

3. The LED light source system of claim 1, wherein, The first light emitting area is a circular light emitting area, and the second light emitting area is an annular light emitting area; or the first light emitting area is a rectangular light emitting area, and the second light emitting area is a back-shaped light emitting area.

4. The LED light source system of claim 1, wherein, The area ratio of the first light emitting area to the second light emitting area is (0.5-2):

1.

5. The LED light source system of claim 4, wherein, The area of the first light emitting area is S1, the area of the second light emitting area is S2, the current value of the first current is I1, and the current value of the second current is I2. Under the condition that the total power is basically constant, S1, S2, I1, and I2 satisfy: When the partitioned LED unit is a uniform LED chip, and the ratio of the light emitting intensity of the first light emitting region to the light emitting intensity of the second light emitting region is 0.85-1.

15. When the partitioned LED unit is a bright center LED chip, the ratio of the light emitting intensity of the first light emitting region to the light emitting intensity of the second light emitting region is greater than or equal to 1.

25. When the partitioned LED unit is a dark core LED chip, the ratio of the light emitting intensity of the first light emitting region to the light emitting intensity of the second light emitting region is less than or equal to 0.

75.

6. The LED light source system according to claim 5, wherein, The area ratio of the first light emitting region and the second light emitting region is (0.5-0.55):1, when the partitioned LED unit is a uniform LED chip; when the partitioned LED unit is a bright center LED chip; when the partitioned LED unit is a dark center LED chip; and / or The area ratio of the first light emitting region and the second light emitting region is (0.7-0.8):1; when the partitioned LED unit is a uniform LED chip; when the partitioned LED unit is a bright center LED chip; when the partitioned LED unit is a dark center LED chip; and / or The area ratio of the first light emitting region and the second light emitting region is (0.9-1.1):1, when the partitioned LED unit is a uniform LED chip; when the partitioned LED unit is a bright center LED chip; when the partitioned LED unit is a dark center LED chip; and / or The area ratio of the first light emitting region and the second light emitting region is (1.2-1.3):1, when the partitioned LED unit is a uniform LED chip; when the partitioned LED unit is a bright center LED chip; when the partitioned LED unit is a dark center LED chip; and / or The area ratio of the first light emitting region and the second light emitting region is (1.4-1.6):1, when the partitioned LED unit is a uniform LED chip; when the partitioned LED unit is a bright center LED chip; when the partitioned LED unit is a dark center LED chip; and / or The area ratio of the first light-emitting region and the second light-emitting region is (1.8-2):1, when the partitioned LED unit is a uniform LED chip; when the partitioned LED unit is a bright-center LED chip; when the partitioned LED unit is a dark-center LED chip.

7. The LED light source system of claim 1, wherein, The light emitting area further comprises a third light emitting area, the third light emitting area is located between the first light emitting area and the second light emitting area, and the area ratio of the first light emitting area, the third light emitting area, and the second light emitting area is (0.5-2):(0.5-2):

1.

8. The LED light source system of claim 1, wherein, The LED light source system further comprises a light mixing element, which is located between the collimating lens assembly and the light emitting lens along the light emitting direction of the LED light emitter.

9. The LED light source system of claim 8, wherein, The light mixing element is a single fly-eye lens, a double fly-eye lens, or a diffusion sheet.

10. The LED light source system according to any one of claims 1 to 9, wherein, 80% or more of the LED light emitting body is a partitioned LED unit with a partitioned light emitting surface, an area of the first light emitting area is S1, an area of the second light emitting area is S2, a current value of the first current is I1, a current value of the second current is I2, the S1, S2, I1, I2 satisfy: The LED light source system obtains a bright center light spot with a middle bright and a dark edge in the focal plane of the light emitting lens; and / or The LED light source system obtains a uniform light spot at the focal plane of the light output lens.

11. The LED light source system according to any one of claims 1 to 9, wherein The light source substrate is a copper substrate and a plurality of ceramic substrates arranged on the copper substrate, the partitioned LED units are arranged on the ceramic substrates, the upper and lower surfaces of the ceramic substrates are provided with circuit layers, the circuit layers in the same horizontal direction comprise first, second, third, fourth, and fifth circuit areas which are insulated from each other, and the fifth circuit area is located in the middle region of the circuit layer in the horizontal direction, the ceramic substrate is provided with a conductive hole penetrating the upper and lower surfaces, the conductive hole penetrates the first, second, third, and fourth circuit areas, and the circuit layers on the upper and lower surfaces are electrically connected through the conductive hole, the substrate is arranged on the fifth circuit area on the upper surface, the surface of the circuit layer on the upper surface of the ceramic substrate is further provided with a metal layer, and the electrode groups are connected to the metal layer through gold wires.

12. The LED light source system according to any one of claims 1 to 9, wherein, The light source substrate is a copper substrate provided with a plurality of protrusions, the partitioned LED units are arranged on the protrusions, the upper surface of the copper substrate is provided with a circuit layer, the circuit layer includes four circuit areas arranged in horizontal direction and / or insulated in vertical direction, a metal layer is arranged above the circuit areas, and the electrode groups are connected with the metal layer through gold wires.

13. The LED light source system according to any one of claims 1 to 9, wherein The first electrode group and the second electrode group each include a positive electrode and a negative electrode; the first light emitting area includes, from top to bottom, a first semiconductor layer, a first active layer, a second semiconductor layer, an insulating layer and a substrate, and further includes a first conductive layer and a second conductive layer in ohmic contact with the first semiconductor layer and the second semiconductor layer respectively; the second light emitting area includes, from top to bottom, a third semiconductor layer, a second active layer, a fourth semiconductor layer, an insulating layer and a substrate, and further includes a third conductive layer and a fourth conductive layer in ohmic contact with the third semiconductor layer and the fourth semiconductor layer respectively, the first conductive layer, the second conductive layer, the third conductive layer and the fourth conductive layer are insulated from each other and arranged in spatial dislocation, and the first conductive layer and the second conductive layer are connected with the two electrodes of the first electrode group, and the third conductive layer and the fourth conductive layer are connected with the two electrodes of the second electrode group.

Images