Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention there is provided the adjustable LED spotlight of a kind of illuminating effect, and this LED spotlight can be applied to the occasion of different-colour and brightness demand, and illuminating effect is better.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides the LED spotlight that a kind of illuminating effect is adjustable, comprising: bracing frame, LED light source and secondary optics part; Described LED light source is multi color temperature light source, and is arranged on support frame as described above; Described secondary optics part is positioned on the emergent light direction of LED light source, and is arranged on support frame as described above; Described secondary optics part comprises set of lenses and the focus control for adjusting the distance in described set of lenses between lens; Described set of lenses comprises the collimation lens and Fresnel Lenses that set gradually along beam projecting direction.
Further, aforementioned multi color temperature light source comprises substrate, and described substrate is provided with the LED of at least two kinds of colour temperatures, by opening and closing the described LED of different-colour and changing the electric current flow through in described LED, thus changes the colour temperature of described multi color temperature light source.
Further, the described LED of often kind of colour temperature is respectively multiple, and between the described LED of various colour temperature, interval is arranged respectively.
Further, the reference color temperature of aforementioned multi color temperature light source is 2700K-6500K.
Further, aforementioned multi color temperature light source is provided with radiator, and described radiator is thermal column radiator and/or phase change technique radiator, and described radiator is bonding by heat-conducting cream fat with described multi color temperature light source.
Further, the cooling air channel for cooling described radiator is also comprised; Described cooling air channel is arranged on support frame as described above, and one end of described cooling air channel connects described radiator, and it is outside that the other end is communicated with LED spotlight, and be provided with fan in this cooling air channel.
Further, aforementioned cooling air channel is extension sleeve, described extension sleeve comprises thermal insulation cylinder and skeleton, described skeleton is for supporting described thermal insulation cylinder, described thermal insulation cylinder is soft material, and described thermal insulation cylinder can along its axial elongation or shortening, and one end of described thermal insulation cylinder is communicated with LED spotlight outside, the other end connects described radiator, and described fan to be arranged in described thermal insulation cylinder and near described radiator.
Further, aforementioned collimation lens comprises the coaxial first surface, the second curved surface and the 3rd curved surface that arrange, described second curved surface is used for reflective, described second curved surface is parabola and its vertex position offers laser pump cavity, described 3rd curved surface is used for mixed light, described 3rd curved surface to be arranged in described laser pump cavity and to be positioned in the focus of described second curved surface, and described first surface is used for optically focused, and described first surface is arranged on the opening of described second curved surface.
Further, also comprise control section, described control section comprises controller, temperature sensor, drive circuit and human-computer interaction device, described human-computer interaction device sends instruction to described controller, described controller sends drive singal to described drive circuit, described drive circuit drives described multi color temperature light source, and described temperature sensor gathers the temperature information of described multi color temperature light source, and passes to described controller.
Further, aforementioned focus control is also provided with motor, described controller controls described motor to realize the automatic focusing to described multi color temperature light source.
(3) beneficial effect
Technique scheme of the present invention has following beneficial effect:
The LED spotlight that illuminating effect provided by the invention is adjustable is by changing colour temperature and the brightness of multi color temperature light source, and the distance between focus control adjustment lens realizes illumination, the hot spot effect of distance lamp body fixed range, with satisfied different scene lighting demand, enable this LED spotlight in TV station studio, outdoor interview and products propaganda photograph taking place obtain large-scale application.
In the LED spotlight that illuminating effect provided by the invention is adjustable, set of lenses comprises collimation lens and Fresnel Lenses, collimation lens i.e. TIR lens, by the optical treatment of complexity, mixed light is carried out to light, and then to coordinate with Fresnel and realize the light modulation that light modulation can realize multi color temperature light source lamp, the problem such as to demarcate between different-colour when significantly can reduce hot spot skewness, imaging obvious.
The LED spotlight that illuminating effect provided by the invention is adjustable, by optimizing heat conduction and heat radiation design, the radiating effect improved, make light fixture itself energy-conservation more than 80%, caloric value also by reducing product reduces its energy consumption indirectly, brings the social exemplary role of green, environmental protection while bringing good economic benefits.
Detailed description of the invention
Below in conjunction with drawings and Examples, embodiments of the present invention are described in further detail.Following examples for illustration of the present invention, but can not be used for limiting the scope of the invention.
In describing the invention, it should be noted that, except as otherwise noted, the implication of " multiple " is two or more; Term " on ", D score, "left", "right", " interior ", " outward ", " front end ", " rear end ", " head ", the orientation of the instruction such as " afterbody " or position relationship be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.In addition, term " first ", " second ", " the 3rd " etc. only for describing object, and can not be interpreted as instruction or hint relative importance.
In describing the invention, also it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary.For the ordinary skill in the art, visual concrete condition understands above-mentioned term concrete meaning in the present invention.
Embodiment one
As illustrated in fig. 1 and 2, the LED spotlight that the embodiment of the present invention provides a kind of illuminating effect adjustable, comprising: bracing frame 13, LED light source 8 and secondary optics part;
Bracing frame 13 is provided be arranged at the adjustable LED spotlight rear end of illuminating effect housing 2, for the adjustable LED spotlight of suspension lighting effect lamp body supporting component 5 and be arranged on the lamp adapter assembly 12 of the adjustable LED spotlight front end of illuminating effect.
Wherein, LED light source 8 is multi color temperature light source, and multi color temperature light source is arranged on support frame as described above 13; Secondary optics part to be arranged on bracing frame 13 and to be positioned on the emergent light direction of described LED light source 8, and is arranged on support frame as described above 13; This secondary optics part comprises set of lenses and the focus control 4 for adjusting the distance in set of lenses between lens.LED spotlight adjusts the focal length of this spotlight by focus control 4 distance adjusted between lens, realizes illumination, the hot spot effect of distance lamp body fixed range, with satisfied different scene lighting demand.
Particularly, as shown in Figure 2, the set of lenses of the present embodiment comprises the collimation lens 9 and Fresnel Lenses 10 that set gradually along beam projecting direction, first carries out mixed light by collimation lens 9 pairs of multi color temperature light sources, carry out optically focused by Fresnel Lenses 10 again, improve lighting effect.Wherein, collimation lens 9 comprises the coaxial first surface, the second curved surface and the 3rd curved surface that arrange, second curved surface is used for reflective, second curved surface is parabola and its vertex position offers laser pump cavity, 3rd curved surface is used for mixed light, 3rd curved surface to be arranged in laser pump cavity and to be positioned in the focus of the second curved surface, and first surface is used for optically focused, and first surface is arranged on the opening of the second curved surface.It should be noted that, first surface can be smooth curved surface, also can be the curved surface of surperficial uniform grid or projection, and the 3rd curved surface can be smooth curved surface, also can be stair-stepping curved surface.Preferably, flat collimation lens 9 selected by this collimation lens 9.
Multi color temperature light source comprises substrate, and substrate is provided with the LED of at least two kinds of colour temperatures, by opening and closing the LED of different-colour and changing the electric current flow through in LED, thus changes the colour temperature of multi color temperature light source.Wherein, the LED of often kind of colour temperature is respectively multiple, and between the LED of various colour temperature, interval is arranged respectively.The reference color temperature of multi color temperature light source is 2700K-6500K.It is the LED of two kinds of colour temperatures in the present embodiment, its colour temperature is respectively 2700K and 6500K, by opening and closing the LED of different-colour and changing in LED the electric current flow through, make that its colour temperature can changing into TV station is respectively the light source of 3200K, the colour temperature in products propaganda photograph taking place be the light source of 4400K and the colour temperature of outdoor interview is the light source of 5600K.Generally, according to scene needs, can carry out the collocation of multiple LED spotlight and use, a LED optically focused is placed in such as front, two sides are respectively placed a LED optically focused and carried out collocation use.
Wherein, substrate can adopt aluminium, copper or pottery to make.Use heat conduction system to be more than or equal to the aluminium base of 100W/mK, copper base or ceramic substrate, improve the radiating effect of high-power LED light source 8.Further, increase substrate area to more than 450 square millimeters simultaneously, improve the radiating effect that LED light source 8 is longitudinal and horizontal.
In order to further improving radiating effect, multi color temperature light source is provided with radiator 7, and radiator 7 is thermal column radiator 7 and/or phase change technique radiator 7, and radiator 7 is bonding by heat-conducting cream fat with multi color temperature light source.The thermal conductivity factor of heat-conducting cream fat is more than or equal to 4W/mK.
Further again, LED spotlight is provided with the cooling air channel 3 for cooling radiator 7; Cooling air channel 3 is arranged on bracing frame 13, one end of cooling air channel 3 connects described radiator 7, it is outside that the other end is communicated with LED spotlight, cooling air channel 3 is provided with air inlet rear end cap 1 in the rear end of spotlight, be communicated with by the cold air of this air inlet rear end cap 1 with this LED spotlight external world, and be provided with fan 6 in cooling air channel 3.The optional fan with having mute function of fan 6.
Wherein, in order to ensure that pipe safety runs, cooling air channel 3 is extension sleeve, extension sleeve comprises thermal insulation cylinder and skeleton, and skeleton is for supporting thermal insulation cylinder, and thermal insulation cylinder is soft material, and thermal insulation cylinder can along its axial elongation or shortening, it is outside that one end of thermal insulation cylinder is communicated with LED spotlight, and the other end connects radiator 7, and fan 6 to be arranged in thermal insulation cylinder and near radiator 7.In the present embodiment, fan 6 can be supply fan, make cooling air channel 3 can blow on radiator 7 continually by the cold air of this LED spotlight outside, thermal insulation cylinder makes the cold air in cooling air channel 3 and the hot-air in lamp body separate, the hot-air avoided in lamp body is blown on radiator 7 by fan 6 circulation, and it also avoid part and take away the hot-air of heat on radiator 7 in the inner constantly circulation of lamp body, reach good radiating effect.Fan 6 can also be scavenger fan, the hot-air on radiator 7 is extracted into LED spotlight through thermal insulation cylinder outside, avoids hot-air by carry heat to lamp body simultaneously, it also avoid hot-air at lamp body Inner eycle, cause radiating efficiency to reduce.In addition, thermal insulation cylinder can also comprise bellow-type expansion joint, slip expansion joint or square natural compensation telescopic joint, its for compensating extraction duct axis, transverse direction, angle are heated the dilatation caused.
In the present embodiment, also comprise control section 11, control section 11 comprises controller, temperature sensor, drive circuit and human-computer interaction device, human-computer interaction device sends instruction to controller, controller sends drive singal to drive circuit, drive circuit drives multi color temperature light source, temperature sensor gathers the temperature information of multi color temperature light source, and pass to controller, the temperature maximum of controller and its storage contrasts, if temperature information is greater than temperature maximum, then controller controls drive circuit, and multi color temperature light source is quit work.It should be noted that, the human-computer interaction device in the present embodiment can be the combination of LCD display, keyboard, adjusting knob, by the change of the colour temperature of Keyboard Control multi color temperature light source, by the size of knob regulating illumination brightness; Also can be touch screen displays, be realized the change of colour temperature and the adjustment to illumination brightness by touch screen.In the present embodiment, temperature sensor is thermocouple.Controller in the present embodiment is single-chip microcomputer.
Wherein, control section 11 also comprises power supply, and the power supply in the present embodiment comprises the battery of 220V alternating current and 12V, is applicable to the joint directly inserting 220V alternating current in indoor, also can adopt battery maintenance work when outdoor.
Control section 11 can also comprise communication module, such as bluetooth, can receive Long-distance Control.
Focus control 4 is also provided with motor 14, and controller controls motor 14 to realize the automatic focusing to multi color temperature light source.It should be noted that, motor 14 can be drive motors, also can be stepper motor.The scope that stepper motor is once focused before can being remembered by controller, focuses during identical occasion after convenient; When adopting drive motors, stopping means can be added in lamp body, thus the scope of restriction focusing.
Control section 1111 also comprises DMX controller, as DMX512 signal light control card; This control section 1111, for the break-make of the brightness and power supply that adjust LED light source 88, makes this product meet studio, the user demand of direct broadcasting room professional domain.
In sum, the present embodiment can the collimation lens 9 of mixed light and the secondary optics part of adjustable focal length by configuration, LED light source 8 combines and arrangement, heat conduction and heat radiation designs, the structures such as cooling air channel 3, the LED spotlight of adjustable focal length is made to realize the function of the adjustable color in white light range from 2700K to 6500K, thus realize the lighting demand being met shooting different-colour by a kind of light fixture, especially the 3200K (corresponding traditional tungsten filament light fixture) that Professional Photography is conventional, 5600K (corresponding conventional metal halide lamp tool) two kinds of white lights, and pass through green energy conservation, do not contain the new advantage of the LED illumination lamp such as ultraviolet human body being had to injury, thus make news interview, the industries such as Professional Photography start to step into turn real LED illumination epoch.
Embodiments of the invention provide in order to example with for the purpose of describing, and are not exhaustively or limit the invention to disclosed form.Many modifications and variations are apparent for the ordinary skill in the art.Selecting and describing embodiment is in order to principle of the present invention and practical application are better described, and enables those of ordinary skill in the art understand the present invention thus design the various embodiments with various amendment being suitable for special-purpose.