WO2012022056A1 - 大范围角度连续可调led聚光灯 - Google Patents

大范围角度连续可调led聚光灯 Download PDF

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Publication number
WO2012022056A1
WO2012022056A1 PCT/CN2010/076964 CN2010076964W WO2012022056A1 WO 2012022056 A1 WO2012022056 A1 WO 2012022056A1 CN 2010076964 W CN2010076964 W CN 2010076964W WO 2012022056 A1 WO2012022056 A1 WO 2012022056A1
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WIPO (PCT)
Prior art keywords
led
concentrating unit
substrate
outer ring
angle
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PCT/CN2010/076964
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English (en)
French (fr)
Inventor
李国全
黄勇斌
黄海林
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珠海市集利发展有限公司
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Publication of WO2012022056A1 publication Critical patent/WO2012022056A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/02—Controlling the distribution of the light emitted by adjustment of elements by movement of light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/02—Fastening of light sources or lamp holders with provision for adjustment, e.g. for focusing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/40—Lighting for industrial, commercial, recreational or military use
    • F21W2131/406—Lighting for industrial, commercial, recreational or military use for theatres, stages or film studios
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2107/00—Light sources with three-dimensionally disposed light-generating elements
    • F21Y2107/10—Light sources with three-dimensionally disposed light-generating elements on concave supports or substrates, e.g. on the inner side of bowl-shaped supports
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2113/00—Combination of light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the invention relates to a LED spotlight which is continuously adjustable over a wide range of angles.
  • the LED itself Due to its special packaging method, the LED itself has a fixed illumination angle, so it is often applied to the luminaire for a fixed angle. This way of working is very inconvenient in film and television lighting and lighting. I hope that the LED lamp can also Working like a traditional spotlight, it has a continuously adjustable function of illumination range and illumination angle, which is the soft rib of LED lights.
  • adjustable angle LED lamps for photography have been available, and there are two main ways to achieve them: the first one is to add a lens in front of the LED lamp bead, and the angle of illumination is changed by adjusting the distance between the lens and the lamp bead.
  • This method and the traditional spotlight The working mode is similar; the other is to adjust the angle by adjusting the angle of the circuit board (or aluminum substrate) on which the LED lamp bead is mounted with respect to the lamp axis.
  • the first method is not suitable for more luminaire applications with only LED lamp beads. There are also ways to change the illumination angle by replacing the lens group, but it is inconvenient, and the continuous illumination angle cannot be adjusted.
  • the second type is suitable for many LED lamp bead applications.
  • the present invention is directed to the improvement of the second aspect with a narrow range of adjustable angles.
  • the advantage is that the structure is simple, but the adjustable angle range is not large, and the spot is more than 1.5 times of the inherent illumination angle of the LED. The brightness of the center point will decrease. When the brightness of the LED is more than twice, the brightness of the center spot will drop greatly, and the central dark spot will appear.
  • the second is an adjustable angle LED spotlight provided by the inventor Huang Yongbin. It is to use four or more plates (circuit boards or aluminum substrates) equipped with LED lamp beads, which are respectively mounted on the rotatable bottom plate of the base, and each bottom plate has a rotatable shaft near the center. Adjust the angle between the bottom plate and the base to change the illumination direction of the LED lamp bead on the lamp board.
  • the main disadvantage is that the adjustable angle range is small. When the intrinsic illumination angle of the LED is more than twice, the spot is darker than the center point. If the total number of the lamp is small, there will be multiple uneven illumination.
  • the above two methods are based on a single-turn adjustable structure, the defect is that the adjustable angle can not be greater than twice the inherent illumination angle of the LED, and the spot has an uneven illumination within the effective illumination range when adjusted to the maximum angle. phenomenon.
  • the technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and to provide an LED spotlight with a multi-turn structure and continuously adjustable illumination angle.
  • the invention has the advantages of wide illumination adjustable range and uniform illumination.
  • the present invention comprises a bottom plate and an angle adjusting device disposed on the plate, and the invention further comprises a center circle LED concentrating unit and at least one ring outer ring LED concentrating unit, each circle
  • the outer ring LED concentrating unit comprises at least three substrates uniformly disposed on the periphery of the center circle concentrating unit and mounted with a plurality of LED lamp beads, wherein adjacent substrates of the inner and outer rings are rotatably connected, and the bottom plate is provided with a supporting base The support of the substrate, the substrate is rotatably connected to the support, and the angle adjusting device controls the lifting movement of the central circle LED concentrating unit in the vertical direction.
  • the substrate includes an adjustment board and an LED light board mounted on the adjustment board, the LED light board is provided with a plurality of LED lamp beads, and the adjustment board is movably connected to the angle adjusting device.
  • the angle adjusting device comprises a lifting screw and a driving screw
  • the substrate of the outer ring LED concentrating unit of the first ring is rotatably connected with the substrate of the central circle LED concentrating unit, and the lifting screw passes through the
  • the bottom plate is connected to the substrate of the central circle LED concentrating unit, and the driving screw is meshed with the lifting screw.
  • the invention adopts the structure of at least two turns of the LED concentrating unit.
  • the structure of the two-turn LED concentrating unit comprises a circle of the outer ring LED concentrating unit, and the outer ring LED concentrating device comprises four to eight The substrate; the ratio of the number of LED lamp beads mounted on the substrate of the center circle LED concentrating unit to the number of LED lamp beads mounted on the substrate of the first circle outer ring LED concentrating unit is 0.12 to 0.2.
  • the present invention adopts the structure of a three-turn LED concentrating unit, it includes two turns of the outer ring LED concentrating unit, the center circle LED concentrating unit is composed of one substrate, and the outer ring of the first ring is concentrating
  • the unit includes eight substrates, the second ring of the outer ring LED concentrating unit includes eight substrates, and the angle adjusting device further includes an adjusting lever, one end of the adjusting lever is connected with the lifting screw, and the other end supports the second ring
  • the support of the outer ring LED concentrating unit is connected; the number of LED lamp beads mounted on the substrate of the outer ring LED concentrating unit of the first ring is mounted on the substrate of the outer ring LED concentrating unit of the second ring
  • the ratio of the number of LED lamp beads is 0.4-0.6; the adjusting lever is provided with a fulcrum located at an end close to the lifting screw, the distance from the fulcrum to the end of the lifting screw and the total length of the adjusting lever The ratio is 0.28 to 0.35.
  • the invention has the beneficial effects that the invention comprises a central circle LED concentrating unit and at least one outer ring LED concentrating unit, which adopts at least two turns of the LED concentrating unit, so that the illumination adjustable range is greatly improved, and
  • the center circle LED concentrating unit performs light filling, which can effectively avoid the phenomenon of uneven brightness of the spot.
  • Each circle of the outer ring LED concentrating unit includes at least three peripherally disposed peripherals of the center circle concentrating unit and is installed with a plurality of a substrate of the LED lamp bead, the substrate adjacent to the inner and outer rings is rotatably connected, the bottom plate is provided with a support for supporting the substrate, the substrate is rotatably connected with the support, and the angle adjusting device controls the center
  • the circular LED concentrating unit moves up and down in the vertical direction, so that a wide range of angles can be quickly and continuously adjusted, different illumination angles are obtained, and the adjustable range of illumination is expanded.
  • Embodiment 1 is a schematic structural view of Embodiment 1 of the present invention.
  • FIG. 2 is a schematic exploded view of a structure according to Embodiment 1 of the present invention.
  • FIG. 3 is a partial structural schematic view of an unadjusted angle according to an embodiment of the present invention.
  • FIG. 4 is a partial structural schematic view of an adjustment angle according to an embodiment of the present invention.
  • Figure 5 is a schematic structural view of Embodiment 2 of the present invention.
  • Figure 6 is a cross-sectional view showing the structure of a second embodiment of the present invention.
  • Figure 7 is a schematic exploded view of a second embodiment of the present invention.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the invention comprises a bottom plate 1 and an angle adjusting device disposed on the plate 1 , and the invention further comprises a central circle LED concentrating unit and at least one outer ring LED gathering.
  • each of the outer ring LED concentrating units includes at least three circuit boards (or aluminum substrates) uniformly disposed around the center circle concentrating unit and mounted with a plurality of LED lamp beads, the substrate including the adjusting plate 2 and an LED lamp panel 3 mounted on the adjusting plate 2, the LED lamp panel 3 is provided with a plurality of LED lamp beads, and the adjacent substrates of the inner and outer rings are rotatably connected, and the bottom plate 1 is provided with a substrate for supporting the substrate a support 6, the substrate is rotatably connected to the support 6, the angle adjusting device controls the vertical movement of the central circle LED concentrating unit in the vertical direction, and the outer ring LED is used by the angle adjusting device The illumination angle of the concentrating unit is controlled.
  • the center circle LED concentrating unit is adjusted for lifting movement by the angle adjusting device. At this time, the outer ring is pulled by the substrate of the center circle LED concentrating unit. The angle of the substrate of the LED concentrating unit is changed to achieve an angle Degree adjustment.
  • the angle adjusting device is a mature technology in the art, and the angle adjusting method is many, and can be manually or electrically.
  • the angle adjusting device includes the lifting screw 4 and the driving screw 5, and the outer ring of the first ring
  • the substrate of the circle LED concentrating unit is rotatably connected to the substrate of the center circle LED concentrating unit, and the lifting screw 4 is connected to the substrate 2 of the center circle LED concentrating unit through the bottom plate 1 , and the driving screw 5 and The lifting screw 4 is driven and engaged, and the driving screw 5 is rotated to make the lifting screw 4 move in a vertical direction by the meshing transmission, thereby causing the center circle LED concentrating unit to perform lifting movement and driving the outer ring.
  • the LED concentrating unit changes in angle.
  • the invention can adopt the structure of at least two turns of the LED concentrating unit.
  • the structure of the two-circle LED concentrating unit is adopted, which comprises a ring of the outer ring LED concentrating unit, and the outer ring LED concentrating unit comprises eight a substrate; a ratio of the number (or power) of LED beads mounted on the substrate of the central circle LED concentrating unit to the number of LED beads (or power) mounted on the substrate of the first circumscribing LED concentrating unit is 0.12 ⁇ 0.2;
  • the substrate shape of the outer ring LED concentrating unit is a polygon, and the substrate of the center circle LED concentrating unit is square, and there is virtually no requirement for the shape of the substrate, and each block
  • the spot projected by the LED lamp bead on the substrate is also independent of the shape of the substrate, and is circular.
  • the projection distance is larger than the outer dimension of the substrate, the formed spot is completely integrated with the spot of the LED lamp bead.
  • the substrate can be made beautiful after the angle is adjusted, and the gap between the substrates is small, which is advantageous for the fan to dissipate heat from the LED lamp bead.
  • the overall arrangement of the LED lamp bead is regular, and the unilateral view is not very regular, so that there is Horizontal or vertical When the shutter is directed, the projection of the light has no obvious horizontal or vertical stripes, and the illumination within the effective illumination range is very uniform.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the structure of the three-circle LED concentrating unit is adopted.
  • the embodiment includes two turns of the outer ring LED concentrating unit, and the central circle LED concentrating unit is a substrate composition, the first ring of the outer ring LED concentrating unit comprises eight substrates, the second ring of the outer ring LED concentrating unit comprises eight substrates, and the angle adjusting device further comprises an adjusting lever 7, the adjusting One end of the lever 7 is connected to the lifting screw 4, and the other end is connected to a support 6 supporting the second ring of the outer ring LED concentrating unit; the first ring of the LED lamp mounted on the substrate of the outer ring LED concentrating unit
  • the ratio of the number of beads (or power) to the number of LED beads (or power) mounted on the substrate of the outer ring LED concentrating unit of the second ring is 0.4-0.6;
  • the adjusting lever 7 is provided with a fulcrum 8, which The fulcrum 8 is located near one end of the lifting screw 4, and the ratio of the
  • a three-turn structure is adopted, and when the multi-turn structure is adopted, in addition to the technical requirements in the case described in the first embodiment, the second and third rings, the third and fourth, fourth, and fifth rings
  • the adjacent rings should be larger than 6 light plates; the total number of LEDs (or power) of the outer ring should be no less than one inner circle; the adjacent two rings can be arranged on the same radiation axis, or
  • the outer one-row substrate is arranged between one and two substrate axes, which is similar to staggered arrangement, so that a uniform illumination spot can be realized with a small number of substrates, and staggered arrangement is particularly important in a multi-turn structure.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

本发明公开了一种大范围角度连续可调LED聚光灯，旨在提供一种利用多圈结构使LED聚光灯的照射角度连续可调且光照可调范围大、照度均匀的LED聚光灯。本发明包括底板（1）和设置在所述板（1）上的角度调节装置，它还包括中心圈LED聚光单元以及至少一圈的外圈LED聚光单元，每一圈所述外圈LED聚光单元包括至少三个均匀设置所述中心圈聚光单元外围并安装有若干LED灯珠的基板，内外圈相邻的基板转动连接，所述底板（1）上设有用于支撑所述基板的支座（6），所述基板与所述支座（6）转动连接，所述角度调节装置控制所述中心圈LED聚光单元在垂直方向的升降运动。本发明应用于影视拍摄照明、广告照明等领域，市场前景广泛。

Description

大范围角度连续可调 LED 聚光灯
技术领域
本发明涉及一种大范围角度连续可调的LED聚光灯。
背景技术
LED因其特殊的封装方式，使得灯珠本身为固定照射角度，所以应用到灯具中多为固定的角度进行照射，如此工作方式在影视照明及布光中则很不方便，希望LED灯也能象传统聚光灯那样工作，具有照射范围和照射角度连续可调功能，这正是LED灯的软肋。目前可调角度的摄影用LED灯具已面市，主要实现方式有两种：第一种是在LED灯珠前加装透镜，通过调整透镜与灯珠的距离来改变照射角度，此方法与传统聚光灯工作方式相类似；另一种是通过调整安装LED灯珠的电路板（或铝基板）相对灯轴线的夹角角度来实现角度调节。第一种方式不适合较多只LED灯珠的灯具应用。也有利用更换透镜组的方式来改变照射角度的，但不方便，也不能实现连续照射角度可调，第二种较适合很多只LED灯珠的灯具应用。
本发明针对第二种方式可调角度范围窄的缺陷进行改进。第二种方式的专利技术已有好多种，但能应用到专业影视灯具的只有两种：其一是扇形结构，该结构类似于一把雨伞，每块安装了LED的灯板（电路板或铝基板）都为扇形，拼接后为一个圆形，周围是固定点也是轴点，中心可移动，其优点是结构简单，但可调角度范围不大，超过1.5倍的LED固有照射角度时光斑中心点亮度会有所下降，超过二倍的LED固有照射角度时中心光斑亮度下降很大，出现中心暗斑；其二是由发明人黄勇斌提供的一种可调角度LED射灯，其工作方式是用四块或更多块装有LED灯珠的板（电路板或铝基板），分别装在位于底座的可转动底板上，每个底板在靠近中心部位都有一个可转动的轴，用于调整底板与底座的角度，以此来改变灯板上LED灯珠的照射方向。其主要缺点是可调整的角度范围较小，超过二倍的LED固有照射角度时光斑除中心点变暗外，外圈如果灯板总数不多，还会有多点光照不均匀现象。
综上所述，以上两种方式都是基于单圈可调结构，其缺陷为可调角度不能大于二倍的LED固有照射角度，光斑在调到最大角度时都有有效照射范围内照度不均现象。
发明内容
本发明所要解决的技术问题是克服现有技术的不足，提供一种多圈结构、照射角度连续可调的LED聚光灯，本发明具有光照可调范围广、照度均匀的优点。
本发明所采用的技术方案是：本发明包括底板和设置在所述板上的角度调节装置，本发明还包括中心圈LED聚光单元以及至少一圈的外圈LED聚光单元，每一圈所述外圈LED聚光单元包括至少三个均匀设置所述中心圈聚光单元外围并安装有若干LED灯珠的基板，内外圈相邻的基板转动连接，所述底板上设有用于支撑所述基板的支座，所述基板与所述支座转动连接，所述角度调节装置控制所述中心圈LED聚光单元在垂直方向的升降运动。
所述基板包括调节板和安装在所述调节板上的LED灯板，所述LED灯板设有若干LED灯珠，所述调节板与所述角度调节装置活动连接。
优化地，所述角度调节装置包括升降螺杆、驱动螺杆，第一圈的所述外圈LED聚光单元的基板与所述中心圈LED聚光单元的基板转动连接，所述升降螺杆穿过所述底板与中心圈LED聚光单元的基板连接，所述驱动螺杆与所述升降螺杆传动啮合。
本发明采用至少两圈LED聚光单元的结构，当采用两圈LED聚光单元的结构时，其包括一圈所述外圈LED聚光单元，所述外圈LED聚光装置包括四至八个基板；所述中心圈LED聚光单元的基板上安装的LED灯珠数量与第一圈外圈LED聚光单元的基板上安装的LED灯珠数量之比为0.12～0.2。
当本发明采用三圈LED聚光单元的结构时，其包括两圈所述外圈LED聚光单元，所述中心圈LED聚光单元由一个基板组成，第一圈所述外圈LED聚光单元包括八个基板，第二圈所述外圈LED聚光单元包括八基板，所述角度调节装置还包括调节杠杆，所述调节杠杆一端与所述升降螺杆连接，另一端与支撑第二圈所述外圈LED聚光单元的支座连接；第一圈所述外圈LED聚光单元的基板上安装的LED灯珠数量与第二圈所述外圈LED聚光单元的基板上安装的LED灯珠数量之比为0.4～0.6；所述调节杠杆上设有支点，该支点位于靠近所述升降螺杆的一端，该支点到所述升降螺杆一端的距离与所述调节杠杆总长度之间的比值为0.28～0.35。
本发明的有益效果是：本发明包括中心圈LED聚光单元以及至少一圈的外圈LED聚光单元，采用了至少两圈LED聚光单元，使光照可调范围大大提高，并且由所述中心圈LED聚光单元进行补光，可有效避免出现光斑亮度不均的现象，每一圈所述外圈LED聚光单元包括至少三个均匀设置所述中心圈聚光单元外围并安装有若干LED灯珠的基板，内外圈相邻的基板转动连接，所述底板上设有用于支撑所述基板的支座，所述基板与所述支座转动连接，所述角度调节装置控制所述中心圈LED聚光单元在垂直方向的升降运动，从而实现大范围角度快速连续可调，得到不同的照射角度，并使光照可调范围得到扩大。
附图说明
图1是本发明实施例一的结构示意图；
图2是本发明实施例一的结构爆炸示意图；
图3是本发明实施例一未调节角度的局部结构示意图；
图4是本发明实施例一调节角度的局部结构示意图；
图5是本发明实施例二的结构示意图；
图6是本发明实施例二的结构剖示图；
图7是本发明实施例二的爆炸示意图。
具体实施方式
实施例一：
如图1、图2、图3、图4所示，包括底板1和设置在所述板1上的角度调节装置，本发明还包括中心圈LED聚光单元以及至少一圈的外圈LED聚光单元，每一圈所述外圈LED聚光单元包括至少三个均匀设置所述中心圈聚光单元外围并安装有若干LED灯珠的电路板（或铝基板），所述基板包括调节板2和安装在所述调节板2上的LED灯板3，所述LED灯板3设有若干LED灯珠，内外圈相邻的基板转动连接，所述底板1上设有用于支撑所述基板的支座6，所述基板与所述支座6转动连接，所述角度调节装置控制所述中心圈LED聚光单元在垂直方向的升降运动，利用所述角度调节装置对所述外圈LED聚光单元的光照角度进行控制，控制时，通过所述角度调节装置调节所述中心圈LED聚光单元作升降运动，此时，由所述中心圈LED聚光单元的基板拉动所述外圈LED聚光单元的基板发生角度变化实现角度调节。
角度调节装置在本领域是成熟技术，实现角度调节的方式很多，可手动也可电动，在本实施例中，所述角度调节装置包括升降螺杆4、驱动螺杆5，第一圈的所述外圈LED聚光单元的基板与所述中心圈LED聚光单元的基板转动连接，所述升降螺杆4穿过所述底板1与中心圈LED聚光单元的基板2连接，所述驱动螺杆5与所述升降螺杆4传动啮合，转动所述驱动螺杆5通过啮合传动使所述升降螺杆4作垂直方向的升降运动，进而使所述中心圈LED聚光单元作升降运动，并带动所述外圈LED聚光单元发生角度变化。
本发明可采用至少两圈LED聚光单元的结构，本实施例采用两圈LED聚光单元的结构，其包括一圈所述外圈LED聚光单元，所述外圈LED聚光单元包括八个基板；所述中心圈LED聚光单元的基板上安装的LED灯珠数量（或功率）与第一圈外圈LED聚光单元的基板上安装的LED灯珠数量（或功率）之比为0.12～0.2；本实施例中，所述外圈LED聚光单元的基板形状为多边形，所述中心圈LED聚光单元的基板为正方形，实际上对所述基板的形状无任何要求，每块基板上的LED灯珠投射出的光斑与基板形状也无关，均为圆形，因为投射距离大于所述基板外形尺寸的多倍，形成的光斑完全是LED灯珠自身光斑的集成，这种设计可以使所述基板在调整角度后外型美观、且基板间缝隙小，有利风扇对LED灯珠散热，LED灯珠排布整体看是规则的，单边看并不是很规则，这样使得在有水平或垂直方向的遮板时，灯光的投影无明显横或竖向条纹，有效照射范围内照度非常均匀。
实施例二：
如图5、图6、图7所示，本实施例中采用三圈LED聚光单元的结构，本实施例包括两圈所述外圈LED聚光单元，所述中心圈LED聚光单元由一个基板组成，第一圈所述外圈LED聚光单元包括八个基板，第二圈所述外圈LED聚光单元包括八个基板，所述角度调节装置还包括调节杠杆7，所述调节杠杆7一端与所述升降螺杆4连接，另一端与支撑第二圈所述外圈LED聚光单元的支座6连接；第一圈所述外圈LED聚光单元的基板上安装的LED灯珠数量（或功率）与第二圈所述外圈LED聚光单元的基板上安装的LED灯珠数量（或功率）之比为0.4～0.6；所述调节杠杆7上设有支点8，该支点8位于靠近所述升降螺杆4的一端，该支点8到所述升降螺杆4一端的距离与所述调节杠杆7总长度之间的比值为0.28～0.35，调节角度时，第一圈所述外圈LED聚光单元的基板受所述中心圈LED聚光单元的基板拉动，形成角度，第二圈所述外圈LED聚光单元的基板一端受第一圈所述外圈LED聚光单元的基板拉动，由所述调节杠杆7顶起支座6进而顶起第二圈所述外圈LED聚光单元的基板，从而形成角度。
本实施例采用三圈结构，采用多圈结构时，除实施例一所述情况下的技术要求外，第二圈与第三圈、第三圈与第四圈、第四圈与第五圈等各相邻圈都应大于6块灯板；外一圈的灯板LED总数量（或功率）不小于内一圈的；相邻两圈的基板排列可以是在同一放射轴线上，也可以是把外一圈的基板排在内一圈两基板轴线之间，类似于交错排列，这样可以在较少的基板数量下实现均匀的照射光斑，在多圈结构时交错排列尤为重要。
采用多圈结构时，可参考内外圈LED灯珠数量比值表（下表）：
内外圈LED数量之比理论值
圈数 相邻两圈比值
1 　
2 0.125
3 0.5
4 0.666667
5 0.75
6 0.8
7 0.833333
8 0.857143
如上表所示，总圈数较多时，外圈要照射的面积会比内圈的大，越往外差别越大，因此理论值给定的范围已有一定的区别，根据情况适当增加外圈LED灯珠数量（或功率）即可达到内外圈照度
一样。

Claims (8)

  1. 一种大范围角度连续可调LED聚光灯，包括底板（1）和设置在所述板（1）上的角度调节装置，其特征在于：它还包括中心圈LED聚光单元以及至少一圈的外圈LED聚光单元，每一圈所述外圈LED聚光单元包括至少三个均匀设置所述中心圈聚光单元外围并安装有若干LED灯珠的基板，内外圈相邻的基板转动连接，所述底板（1）上设有用于支撑所述基板的支座（6），所述基板与所述支座（6）转动连接，所述角度调节装置控制所述中心圈LED聚光单元在垂直方向的升降运动。
  2. 根据权利要求1所述的一种大范围角度连续可调LED聚光灯，其特征在于：所述基板包括调节板（2）和安装在所述调节板（2）上的LED灯板（3），所述LED灯板（3）设有若干LED灯珠，所述调节板（2）与所述角度调节装置活动连接。
  3. 根据权利要求1或2所述的一种大范围角度连续可调LED聚光灯，其特征在于：所述角度调节装置包括升降螺杆（4）、驱动螺杆（5），第一圈的所述外圈LED聚光单元的基板与所述中心圈LED聚光单元的基板转动连接，所述升降螺杆（4）穿过所述底板（1）与中心圈LED聚光单元的基板（2）连接，所述驱动螺杆（5）与所述升降螺杆（4）传动啮合。
  4. 根据权利要求1或2所述的一种大范围角度连续可调LED聚光灯，其特征在于：它包括一圈所述外圈LED聚光单元，所述外圈LED聚光装置包括四至八个基板。
  5. 根据权利要求1或2所述的一种大范围角度连续可调LED聚光灯，其特征在于：它包括两圈所述外圈LED聚光单元，所述中心圈LED聚光单元由一个基板组成，第一圈所述外圈LED聚光单元包括八个基板，第二圈所述外圈LED聚光单元包括八个基板，所述角度调节装置还包括调节杠杆（7），所述调节杠杆（7）一端与所述升降螺杆（4）连接，另一端与支撑第二圈所述外圈LED聚光单元的支座连接。
  6. 根据权利要求5所述的大范围角度连续可调LED聚光灯，其特征在于：所述中心圈LED聚光单元的基板上安装的LED灯珠数量与第一圈外圈LED聚光单元的基板上安装的LED灯珠数量之比为0.12～0.2。
  7. 根据权利要求5所述的大范围角度连续可调LED聚光灯，其特征在于：第一圈所述外圈LED聚光单元的基板上安装的LED灯珠数量与第二圈所述外圈LED聚光单元的基板上安装的LED灯珠数量之比为
    0.4～0.6。
  8. 根据权利要求5所述的大范围角度连续可调LED聚光灯，其特征在于：所述调节杠杆（7）上设有支点（8），该支点（8）位于靠近所述升降螺杆（4）的一端，该支点（8）到所述升降螺杆（4）一端的距离与所述调节杠杆（7）总长度之间的比值为0.28～0.35。
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