WO2017024556A1

WO2017024556A1 - Lighting effect adjustable led spotlight

Info

Publication number: WO2017024556A1
Application number: PCT/CN2015/086774
Authority: WO
Inventors: 陈熙鹏; 何凯; 李富春
Original assignee: 北京莱斯达电子科技有限公司
Priority date: 2015-08-12
Filing date: 2015-08-12
Publication date: 2017-02-16

Abstract

A lighting effect adjustable LED spotlight, comprises: a support frame (13), an LED light source (8), and a secondary optical part; the LED light source (8) being a multi-color temperature light source and being disposed on the support frame (13); the secondary optical part being positioned in the light-emitting direction of the LED light source (8) and being disposed on the support frame (13); the secondary optical part comprising a lens group and a focusing device (4) for adjusting the distance between the lenses within the lens group; and the lens group comprising a collimating lens (9) and a Fresnel lens (10) sequentially disposed along the light-emitting direction. The LED spotlight can be applied to occasions of different color temperature and brightness requirements, and has preferable lighting effects.

Description

LED spotlight with adjustable lighting effect

Technical field

The utility model relates to the technical field of lighting equipment, in particular to an LED spotlight, and more particularly to an LED spotlight with adjustable lighting effect.

Background technique

The green, energy-saving and environmentally-friendly LED LED application technology has continuously penetrated into all aspects of society and life, bringing huge benefits to the society in energy conservation and emission reduction and creating a green life. In the professional fields such as studios and live broadcast rooms of TV stations, most of them still stay in the stage of using traditional 2000W tungsten lamps, which causes waste of energy and cannot achieve green and environmental protection effects. The main reason is that the current LED spotlights have a large gap between the fixed distance illumination, the spot effect and the color rendering index compared with the conventional 2000W tungsten lamp.

At present, outdoor interviews, TV studios and product promotion photo shooting venues need to use LED spotlights to improve the lighting effect. The lamps are flat-panel LED lamps with surface light source and LED spotlights with simple secondary optical adjustable focal length. In the prior art, the general LED light source adopts a monochromatic temperature light source, but the monochromatic temperature light source can only be used in a single scene, and does not have the function of an LED spotlight applied to a plurality of different color temperature and brightness requirements, and when the LED When the light source adopts a multi-color temperature light source, there is a problem that the spot effect and the light mixing effect are not good.

Utility model content

(1) Technical problems to be solved

The technical problem to be solved by the utility model is to provide an LED spotlight with adjustable illumination effect, and the LED spotlight can be applied to different color temperature and brightness requirements, and the lighting effect is good.

(2) Technical plan

In order to solve the above technical problem, the utility model provides an adjustable lighting effect. The LED spotlight comprises: a support frame, an LED light source and a secondary optical part; the LED light source is a multi-color temperature light source and is disposed on the support frame; the secondary optical part is located in an outgoing light direction of the LED light source, and Provided on the support frame; the secondary optical portion includes a lens group and a focusing device for adjusting a distance between the lenses in the lens group; the lens group includes collimation sequentially disposed along a light emission direction Lens and Fresnel lens.

Further, the multi-color temperature light source comprises a substrate, and the substrate is provided with LED lights of at least two color temperatures, and the LED lamps of different color temperatures are turned on and off, and the current flowing in the LED lamps is changed, thereby changing the The color temperature of the multicolor temperature source.

Further, each of the LED lamps of each color temperature is respectively provided, and the LED lamps of various color temperatures are respectively arranged at intervals.

Further, the color temperature range of the multi-color temperature light source is 2700K-6500K.

Further, the multi-color temperature light source is provided with a heat sink, and the heat sink is a heat column heat sink and/or a phase change technology heat sink, and the heat sink and the multi-color temperature light source are bonded by a thermal grease.

Further, a cooling air duct for cooling the heat sink is further disposed; the cooling air duct is disposed on the support frame, one end of the cooling air duct is connected to the heat sink, and the other end is connected to the outside of the LED spotlight. And a fan is arranged in the cooling air duct.

Further, the cooling air duct is a telescopic sleeve, the telescopic sleeve includes a temperature isolation cylinder and a skeleton, and the skeleton is used for supporting the temperature isolation cylinder, the temperature isolation cylinder is a soft material, and the partition is The temperature cylinder can be elongated or shortened along its axial direction, one end of the temperature isolation cylinder is connected to the outside of the LED spotlight, and the other end is connected to the heat sink, and the fan is disposed in the temperature isolation cylinder and close to the heat sink.

Further, the collimating lens includes a first curved surface, a second curved surface and a third curved surface which are coaxially disposed, the second curved surface is used for reflecting light, and the second curved surface is a paraboloid and a concentrating position is opened at the apex position thereof. The third curved surface is used for light mixing, the third curved surface is disposed in the concentrating cavity and is located at a focus of the second curved surface, the first curved surface is used for collecting light, and the first curved surface is disposed at On the opening of the second curved surface.

Further, a control part is further included, and the control part includes a controller and a temperature transfer a sensor, a driving circuit, and a human-machine interaction device, wherein the human-machine interaction device sends an instruction to the controller, the controller sends a driving signal to the driving circuit, and the driving circuit drives the multi-color temperature light source, The temperature sensor collects temperature information of the multi-color temperature light source and transmits it to the controller.

Further, the foregoing focusing device is further provided with a motor, and the controller controls the motor to realize automatic focusing of the multi-color temperature light source.

(3) Beneficial effects

The above technical solution of the utility model has the following beneficial effects:

The LED spotlight provided by the utility model adjusts the color temperature and brightness of the multi-color temperature light source, and adjusts the distance between the lenses by the focusing device to realize the illuminance and spot effect of the fixed distance from the lamp body to meet different scene illuminations. Demand, the LED spotlight can be used in large-scale applications in TV studios, outdoor interviews and product promotion photo shooting venues.

In the LED spotlight with adjustable illumination effect, the lens group comprises a collimating lens and a Fresnel lens, and the collimating lens is also a TIR lens, and the light is mixed by complicated optical processing, and then with Fresnel The dimming can realize the dimming of the multi-color temperature light source lamp, which can greatly reduce the uneven distribution of the spot and the obvious boundary between different color temperatures during imaging.

The LED spotlight with adjustable illumination effect provided by the utility model optimizes the heat conduction and heat dissipation design, improves the heat dissipation effect, and makes the lamp itself more than 80% energy-saving, and indirectly reduces the energy consumption thereof by reducing the heat generation of the product, and brings good At the same time, economic benefits bring about a social demonstration of green and environmental protection.

DRAWINGS

Figure 1 is a front view of the LED spotlight with adjustable illumination effect of the present invention;

FIG. 2 is a cross-sectional view along the line A-A of the LED spotlight with adjustable illumination effect of FIG. 1. FIG.

Wherein, 1-intake rear end cover; 2-shell; 3-cooling air duct; 4-focusing device; 5-lamp support assembly; 6-fan; 7-heat sink; 8-LED light source; Collimating lens; 10-Fresnel Mirror; 11-control part; 12-lamp assembly; 13-support frame; 14-motor.

detailed description

The embodiments of the present invention are further described in detail below with reference to the accompanying drawings and embodiments. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, it should be noted that, unless otherwise stated, the meaning of "a plurality" is two or more; the terms "upper", "lower", "left", "right", " The orientation or positional relationship of the indications such as "inside", "outside", "front end", "back end", "head", "tail" and the like is based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the utility. The singular and simplistic descriptions of the present invention are not intended to be construed as limiting the scope of the invention. Moreover, the terms "first", "second", "third", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that the terms "installation", "connected", and "connected" should be understood broadly, unless otherwise explicitly defined and limited. For example, it may be a fixed connection or Removable connection, or integral connection; can be mechanical connection or electrical connection; can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood as the case may be.

Embodiment 1

As shown in FIGS. 1 and 2, an embodiment of the present invention provides an LED spotlight with adjustable illumination effects, including: a support frame 13, an LED light source 8, and a secondary optical portion;

The support frame 13 is provided with a housing 2 disposed at the rear end of the LED spotlight with adjustable illumination effect, a lamp body support assembly 5 for hanging the LED spotlight with adjustable illumination effect, and a lamp holder mounted on the front end of the LED spotlight with adjustable illumination effect. Component 12.

Wherein, the LED light source 8 is a multi-color temperature light source, and the multi-color temperature light source is disposed on the support frame 13; the secondary optical portion is disposed on the support frame 13 and located at the LED light source 8 The light-emitting direction is disposed on the support frame 13; the secondary optical portion includes a lens group and a focusing device 4 for adjusting a distance between the lenses in the lens group. The LED spotlight adjusts the distance between the lenses through the focusing device 4 to adjust the focal length of the spotlight, and realizes the illuminance and spot effect of the fixed distance from the lamp body to meet the lighting requirements of different scenes.

Specifically, as shown in FIG. 2, the lens group of the present embodiment includes a collimator lens 9 and a Fresnel lens 10 which are sequentially disposed along the light emission direction, and the multicolor temperature light source is first mixed by the collimator lens 9, and then passed through. The Fresnel lens 10 condenses light to improve the illumination effect. The collimating lens 9 includes a first curved surface, a second curved surface and a third curved surface which are coaxially disposed. The second curved surface is used for reflecting light, the second curved surface is a paraboloid, and the apex position of the second curved surface is a concentrating cavity, and the third curved surface is used for mixing. The third curved surface is disposed in the concentrating cavity and is located at a focus of the second curved surface. The first curved surface is used for collecting light, and the first curved surface is disposed on the opening of the second curved surface. It should be noted that the first curved surface may be a smooth curved surface, or may be a surface uniformly distributed grid or a convex curved surface, and the third curved surface may be a smooth curved surface or a stepped curved surface. Preferably, the collimating lens 9 is a flat collimating lens 9.

The multi-color temperature light source comprises a substrate, and the substrate is provided with at least two color temperature LED lamps, and the color temperature of the multi-color temperature light source is changed by turning on and off the LED lamps of different color temperatures and changing the current flowing in the LED lamps. Among them, there are a plurality of LED lights of each color temperature, and LED lights of various color temperatures are respectively arranged at intervals. The color temperature range of the multi-color temperature source is 2700K-6500K. In this embodiment, two color temperature LED lamps have color temperatures of 2700K and 6500K respectively. By turning on and off the LED lights of different color temperatures and changing the current flowing in the LED lamps, the color temperature can be changed to the color temperature of the television station. 3200K light source, product promotion photo shooting site with a color temperature of 4400K and a color source for outdoor interviews with a color temperature of 5600K. Under normal circumstances, according to the needs of the scene, multiple LED spotlights can be used together, for example, one LED is concentrated on the front side, and one LED is placed on both sides for use.

Among them, the substrate can be made of aluminum, copper or ceramic. An aluminum substrate, a copper substrate or a ceramic substrate having a thermal conductivity of 100 W/m·K or more is used to improve the heat dissipation effect of the high-power LED light source 8. Further, increase the substrate area to 450 square millimeters or more at the same time, and increase the LED The heat dissipation effect of the light source 8 in the longitudinal direction and the lateral direction.

In order to further improve the heat dissipation effect, the multi-color temperature light source is provided with a heat sink 7, which is a heat column heat sink 7 and/or a phase change technology heat sink 7, and the heat sink 7 and the multi-color temperature light source are bonded by a thermal grease. The thermal conductivity of the thermal grease is greater than or equal to 4 W/m·K.

Further, the LED spotlight is provided with a cooling duct 3 for cooling the radiator 7; the cooling duct 3 is disposed on the support frame 13, one end of the cooling duct 3 is connected to the radiator 7, and the other end is connected to the outside of the LED spotlight. The cooling duct 3 is provided with an intake rear end cover 1 at the rear end of the spotlight, through which the intake rear end cover 1 communicates with the cold air outside the LED spotlight, and the cooling duct 3 is provided with a fan 6. The fan 6 can be equipped with a fan with a mute function.

In order to ensure the safe operation of the pipeline, the cooling air duct 3 is a telescopic sleeve, the telescopic sleeve comprises a temperature isolation cylinder and a skeleton, the skeleton is used for supporting the temperature isolation cylinder, the temperature isolation cylinder is a soft material, and the temperature separation cylinder can be along the same The axial extension or shortening, one end of the temperature separation cylinder is connected to the outside of the LED spotlight, and the other end is connected to the heat sink 7, and the fan 6 is disposed in the temperature isolation cylinder and close to the heat sink 7. In this embodiment, the fan 6 may be an intake fan, so that the cooling air duct 3 can continuously blow the cold air source outside the LED spotlight to the radiator 7, and the temperature separating cylinder cools the air and the lamp in the cooling duct 3. The hot air in the body is separated, so that the hot air in the lamp body is prevented from being circulated to the radiator 7 by the fan 6, and the hot air which partially removes the heat from the radiator 7 is continuously circulated inside the lamp body, achieving good Cooling effect. The fan 6 can also be an exhaust fan, and the hot air on the radiator 7 is pumped to the outside of the LED spotlight through the temperature isolator, and the hot air is prevented from bringing heat to the lamp body, and the hot air is prevented from circulating in the lamp body, thereby causing heat dissipation. Reduced efficiency. In addition, the temperature isolation cylinder may further include a corrugated expansion joint, a sleeve expansion joint or a square natural compensation expansion joint for compensating the expansion and contraction deformation of the absorption pipe in the axial, lateral, and angular directions.

In this embodiment, the control part 11 further includes a controller, a temperature sensor, a driving circuit, and a human-machine interaction device. The human-machine interaction device sends an instruction to the controller, and the controller sends a driving signal to the driving circuit, and the driving circuit Driving the multi-color temperature light source, the temperature sensor collects the temperature information of the multi-color temperature light source, and transmits it to the controller, and the controller compares with the stored maximum temperature value. If the temperature information is greater than the highest temperature value, the controller controls The drive circuit stops the multi-color temperature light source. It should be noted that the human-machine interaction device in this embodiment may be a combination of an LCD display, a keyboard, and an adjustment knob, and the color temperature of the multi-color temperature light source is controlled by the keyboard, and the brightness of the light is adjusted by the knob; The display realizes the change of the color temperature and the adjustment of the brightness of the light through the touch screen. In this embodiment, the temperature sensor is a thermocouple. The controller in this embodiment is a single chip microcomputer.

The control part 11 further includes a power source. The power supply in this embodiment includes a 220V AC power supply and a 12V battery. It is suitable for directly inserting a 220V AC power connector indoors, or it can be used to maintain the battery when it is outdoors.

The control section 11 may also include a communication module, such as Bluetooth, that can receive remote control.

A motor 14 is also provided on the focusing device 4, and the controller controls the motor 14 to achieve automatic focusing of the multi-color temperature source. It should be noted that the motor 14 may be a driving motor or a stepping motor. The stepper motor can memorize the range of the previous focus adjustment through the controller, which is convenient for focusing after the same occasion. When the drive motor is used, a limit device can be added to the lamp body to limit the range of focus adjustment.

The control part 1111 further includes a DMX controller, such as a DMX512 lighting control card; the control portion 1111 is used to adjust the brightness of the LED light source 88 and the on and off of the power source, so that the product satisfies the needs of the professional field in the studio and the live broadcast room.

In summary, the embodiment is configured by arranging a collimating lens 9 that can be mixed with light, a secondary optical portion of the adjustable focal length, an LED light source 8 combination and arrangement, a heat conduction heat dissipation design, a cooling air duct 3, and the like. The focal length LED spotlight realizes the function of adjustable color temperature from 2700K to 6500K white light range, so as to meet the lighting requirements of shooting different color temperature through a kind of luminaire, especially the 3200K (corresponding to traditional tungsten lamp) and 5600K (common for professional photography). Corresponding to traditional metal halide lamps) two kinds of white light, and through the new advantages of green energy-saving, UV-free LED lighting, etc., so that news interviews, professional photography and other industries began to enter the real LED lighting era .

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to Many modifications and variations will be apparent to those skilled in the art. The choice and description of the embodiment is for The principles and practical applications of the present invention are better described, and those of ordinary skill in the art can understand the present invention to design various embodiments with various modifications that are suitable for the particular application.

Claims

An LED spotlight with adjustable illumination effect, comprising: a support frame, an LED light source and a secondary optical part; the LED light source is a multi-color temperature light source, and is disposed on the support frame; the secondary optics Partially located in the direction of the outgoing light of the LED light source and disposed on the support frame; the secondary optical portion includes a lens group and a focusing device for adjusting a distance between the lenses in the lens group; the lens The group includes a collimating lens and a Fresnel lens which are sequentially disposed in the direction in which the light is emitted.
The LED spotlight with adjustable illumination effect according to claim 1, wherein the multi-color temperature light source comprises a substrate, and the substrate is provided with at least two color temperature LED lamps, and the same color temperature is turned on and off. The LED lamp and the current flowing in the LED lamp are varied to change the color temperature of the multi-color temperature source.
The LED spotlight with adjustable illumination effect according to claim 2, wherein each of the LED lights of each color temperature is respectively provided, and the LED lights of various color temperatures are respectively arranged at intervals.
The LED spotlight with adjustable illumination effect according to any one of claims 1 to 3, characterized in that the color temperature of the multicolor temperature light source ranges from 2700K to 6500K.
The LED spotlight with adjustable illumination effect according to claim 1, wherein the multi-color temperature light source is provided with a heat sink, and the heat sink is a heat column heat sink and/or a phase change technology heat sink, The heat sink and the multi-color temperature light source are bonded by a thermal grease.
The LED spotlight with adjustable illumination effect according to claim 5, further comprising a cooling air duct for cooling the radiator; the cooling air duct is disposed on the support frame, the cooling wind One end of the track is connected to the heat sink, and the other end is connected to the outside of the LED spotlight, and a fan is arranged in the cooling air duct.
The LED spotlight with adjustable illumination effect according to claim 6, wherein the cooling air duct is a telescopic sleeve, and the telescopic sleeve comprises a temperature isolation cylinder and a skeleton, and the skeleton is used for supporting the partition. a temperature cylinder, the temperature isolation cylinder is a soft material, and the temperature isolation cylinder can be elongated or shortened along an axial direction thereof, and one end of the temperature isolation cylinder is connected to the outside of the LED spotlight. The other end is connected to the heat sink, and the fan is disposed in the temperature isolation cylinder and close to the heat sink.
The LED spotlight with adjustable illumination effect according to claim 1, wherein the collimating lens comprises a first curved surface, a second curved surface and a third curved surface disposed coaxially, and the second curved surface is used for reflecting light. The second curved surface is a paraboloid and the apex position thereof defines a concentrating cavity, the third curved surface is used for light mixing, and the third curved surface is disposed in the concentrating cavity and is located at a focus of the second curved surface. The first curved surface is used for collecting light, and the first curved surface is disposed on an opening of the second curved surface.
The LED spotlight with adjustable illumination effect according to claim 1, further comprising a control portion, the control portion comprising a controller, a temperature sensor, a driving circuit and a human-machine interaction device, wherein the human-machine interaction device The controller sends an instruction, the controller sends a driving signal to the driving circuit, the driving circuit drives the multi-color temperature light source, and the temperature sensor collects temperature information of the multi-color temperature light source, and transmits the temperature information to the Controller.
The LED spotlight with adjustable illumination effect according to claim 9, wherein the focusing device is further provided with a motor, and the controller controls the motor to realize automatic focusing of the multi-color temperature light source. .