CN201014251Y

CN201014251Y - Lamp

Info

Publication number: CN201014251Y
Application number: CNU2007200012199U
Authority: CN
Inventors: 宋义; 苏遵惠; 谢飞; 阳菊村
Original assignee: Shenzhen Diguang Electronics Co Ltd
Current assignee: Dongguan Diguang Electronics Co., Ltd.
Priority date: 2007-01-09
Filing date: 2007-01-09
Publication date: 2008-01-30
Anticipated expiration: 2017-01-09

Abstract

The utility model relates to a lamp, which comprises a power source converter that converts AC power source to an LED needed DC power source, and a controller controls brightness and/or color of the LED electrically connected with the power source converter. A lighting body comprising the LED, a circuit board, a light and thermal conduction element and a diffusion element is an LED backlight module, wherein, the LED is arranged on the circuit board and electrically connected with the circuit board. The light and thermal conduction element is arranged on the circuit board and the LED. The diffusion element is arranged on the light and thermal conduction element. The lighting body is electrically connected with the controller by the circuit board. The utility model has full utilization of the lighting of the LED, soft planar light after the diffusion, and none flickering light even under the condition of higher brightness, and controlled brightness or color, the color temperature closer to the natural light domain, and is the lamp with long service life and environmental protection.

Description

Light fixture

Technical field

The utility model relates to a kind of light fixture, particularly a kind of light fixture that adopts the LED-backlit module as illuminator.

Background technology

The light source of traditional lighting light fixture has incandescent lamp, Halogen lamp LED, fluorescent lamp etc., and the source efficiency that incandescent lamp and Halogen lamp LED are low and a large amount of thermal waste withdraw from from lighting field gradually, unless special use occasion.Though and the fluorescent lamp source efficiency is higher, the conversion efficiency that it needs high-frequency and high-voltage to start makes its overall efficiency reduce about 20%; And the brightness of fluorescent lamp is unadjustable and the unicity of tone, makes it not have the decorative effect of light modulation, toning.And LED is as light source, though its source efficiency is at present a little less than fluorescent lamp, but advantages such as it has long service life, little, in light weight, the no pernicious gas of volume, environmental protection, startup and work under the little current status of low pressure, energy consumption is little, light is pure, its scope of application is progressively enlarging, and use amount is increasing year by year.

LED a kind ofly ties the semiconductor solid luminescence device that can send visible light, ultraviolet light, infrared light when applying forward current at P-N.When adding forward voltage, can cause the minimizing of electronic potential, the potential energy converting and energy of minimizing is an electromagnetic energy, and discharges with the form of photon.The luminous energy of its release is relevant with the voltage of lighting diode with the electric weight of electronics, promptly

E＝qV(J)(q＝-1.6×10-19C)

The peak wavelength that discharges light is then relevant with the used semi-conducting material of luminescence chip, promptly

λ≈1240/Eg(nm)

(Eg---semi-conducting material energy gap " ev ")

The semi-conducting material energy gap that produces visible light should be between 1.60～3.26ev.

The LED light fixture is also arranged in the market, and Fig. 1 .1 and Fig. 1 .2 are known LED lamp schematic diagrames.But these light fixtures all do not have photodiffusion material (mixed light technology), can directly see one by one LED pipe or the light that sends of chip, because the directive property of LED light is very strong, so when LED number seldom the time, it is not enough that brightness seems; And brightness seems dazzling especially again when reaching requirement, is unfavorable for the health of human eye; All do not have light reflecting material, make the luminous utilization rate of LED not high; All do not have the leaded light Heat Conduction Material, the heat that LED is sent can not in time be discharged.

Summary of the invention

The purpose of this utility model is to provide a kind of light fixture, adopt the LED-backlit module as the light source body, give full play to little, in light weight, the no pernicious gas of long service life, volume, environmental protection, the startup and the work under the little current status of low pressure of led light source, advantage such as energy consumption is little, light is pure; And this light fixture also utilizes the backlight principle, and the luminous of LED is fully used, and obtains soft planar light after the light diffusion, and is even when brightness is very high, also not dazzling; And can control its brightness or color, make the colour temperature light territory that more gets close to nature; The leaded light Heat Conduction Material links to each other LED with shell, the heat that LED is sent passes through through hole---leaded light Heat Conduction Material---, and shell distributes, and is long-life, environmental protection light fixture.

To achieve these goals, the utility model provides a kind of light fixture, comprising: the power supply changeover device that AC power is converted to the required dc source of LED; The controller of control LED brightness and/or color is electrically connected with above-mentioned power supply changeover device; Illuminator, be the LED-backlit module, include LED, circuit board, leaded light heat conducting element and diffused component, wherein said LED is arranged on the circuit board, and be electrically connected with described circuit board, described leaded light heat conducting element is arranged on described circuit board and the LED, and described diffused component is arranged on the described leaded light heat conducting element; Described illuminator is electrically connected with described controller by circuit board.

The utility model is further preferably: be provided with through hole near the described circuit onboard led, described leaded light heat conducting element pours in the described through hole simultaneously, and extends to the below of described circuit board; Described through hole perisporium is provided with Copper Foil, contacts with the Copper Foil of described fixed L ED; Described in addition illuminator also includes reflecting element, is arranged between described circuit board below and the leaded light heat conducting element, has the perforation corresponding to described through hole, and described leaded light heat conducting element pours in the described perforation.

The utility model is further preferably: described illuminator includes at least one group of LED, and every group of LED comprises monochromatic LED or multi-colored led; Described monochromatic LED is at least one white, redness, blueness or green LED; Described multi-colored led for red, blueness and green LED be one group; Described monochromatic LED group and described every group multi-colored led or be rounded projections arranged, or be rectangular arranged; Multi-colored led group or be rectangular arranged or for rounded projections arranged.

The advantage that the utlity model has: its light source adopts LED, and the backlight technology is adopted in the secondary optics design, with the spot light complanation light source of LED, makes light soft not dazzling; Because of LED starting resistor, electric current and operating voltage, electric current are identical, and be low pressure, little current work, so energy saving; The brightness of LED changes with the change of operating voltage, electric current, and good controllability is arranged; LED is a solid light source, and is long-acting durable, and do not contain toxic gas, is the environmental protection light source.

Above-mentioned and additional features, advantage of the present utility model can further be understood by the detailed description below in conjunction with accompanying drawing.

Description of drawings

Fig. 1 .1 is the schematic diagram one of existing light fixture;

Fig. 1 .2 is the schematic diagram two of existing light fixture;

Fig. 2 is the schematic diagram of the utility model light fixture;

Fig. 3 is the schematic diagram of illuminator;

Fig. 4 arranges schematic diagram one for LED;

Fig. 5 arranges schematic diagram two for LED.

Description of reference numerals: power supply changeover device 1; Controller 2; Illuminator 3; LED 31; Circuit board 32; Leaded light heat conducting element 33; Diffused component 34; Through hole 35; Copper Foil 36; Reflecting element 37; Shell 38.

The specific embodiment

As shown in Figures 2 and 3, the utility model provides a kind of light fixture, and it is to adopt LED as light emitting source, can be used for kinds such as wall lamp, bedside lamp, pendent lamp, floor lamp, gate light, embedded ceiling light, desk lamp, lamp affixed to the ceiling; Include power supply changeover device 1 and controller 2, power supply changeover device 1 is converted to the required dc source of LED with general 220V AC power; And controller 2 is used to control brightness and/or the color of LED, is electrically connected with above-mentioned power supply changeover device 1, and the 220V AC power is delivered to brightness and/or delicolor controller 2 after power supply changeover device 1 converts suitable DC voltage to.

Described light fixture also includes illuminator 3, and as shown in Figure 3, it is the LED-backlit module, includes LED31, circuit board 32, leaded light heat conducting element 33 and diffused component 34, wherein:

Described LED 31 is at least one group of LED, and every group of LED comprises monochromatic LED or multi-colored led; Described monochromatic LED is at least one white, redness, blueness or green LED; Described multi-colored led for red, blueness and green LED be one group.As shown in Figure 4 and Figure 5, it is two kinds of arrangement schematic diagrames of LED.As shown in Figure 5, when adopting multi-colored led the time, described every group of redness, blueness and green LED in multi-colored led is rounded projections arranged, and whole multi-colored led group be rectangular arranged.As shown in Figure 4, when adopting monochromatic LED, described monochromatic LED group is a rectangular arranged.Certainly, the arrangement mode of above-mentioned LED only is a preferred scheme in the utility model, those skilled in the art can understand easily, the arrangement of LED also can be other mode, such as radially, some other arrangement clocklike such as circular or trapezoidal, even also can be irregular arrangement.Described LED 31 is arranged on the circuit board 32, and is electrically connected with described circuit board 32 by electrode, and described illuminator 3 is to be electrically connected with described controller 2 by circuit board 32.

Described leaded light heat conducting element 33 is arranged on described circuit board 32 and the LED 31, and the light that is used for LED is sent carries out leaded light, and the heat that LED is produced dispels the heat.And described diffused component 34 is arranged on the described leaded light heat conducting element 33, and the LED spot light is carried out mixed light, makes LED spot light complanation light source, to improve the uniformity and the soft property of light-source brightness.

In another embodiment, as shown in Figure 3, be provided with through hole 35 near the LED 31 on the described circuit board 32, described leaded light heat conducting element 33 pours in the described through hole 35 simultaneously, and extend to the below of described circuit board 32, just, this moment, described leaded light heat conducting element 33 was the upper and lower surfaces that are positioned at described circuit board 32 simultaneously, and was communicated with by through hole 35.Further, can be provided with Copper Foil 36 on the perisporium of described through hole 35, contact, can dispel the heat LED with the Copper Foil of described fixed L ED 31.

At this moment, described illuminator 3 can also include reflecting element 37, and it is arranged between described circuit board 32 belows and the leaded light heat conducting element 33, and the light of the downward ejaculation of LED 31 light sources generation is reflected to upper surface, thereby improves the luminous efficiency of LED; Described reflecting element 37 has the perforation corresponding to described through hole 35, in the described perforation of described leaded light heat conducting element 33 perfusions.

In addition, described illuminator 3 also includes metal shell or plastic casing 38, and above-mentioned each parts are contained in the described shell 38.At this moment, described leaded light heat conducting element 33 carries out thermally coupled with LED 31, Copper Foil 36 and shell 38, as the conductor of light source heat, thereby helps the heat radiation of illuminator 3.

It will be appreciated by persons skilled in the art that brightness and/or delicolor controller 2 or with dimmer switch control, or with light modulation by key control, or with remote controller control, or control with inductive switch; If led light source is made up of monochromatic LED, controller is then regulated the brightness of LED; If led light source is made up of multi-colored led, controller is then regulated brightness and the color of LED.

Described shell 38 places the outside of illuminator 3, in order to support and fixed L ED 31, circuit board 32, leaded light heat conducting element 33 reflecting element 37, diffused component 34 etc.Can be directly when described shell is metal as the heat sink of led light source.And if plastic casing then can add bright coating or sputter bright metal or add light coating on its surface, as the heat sink of light source, and can and as the decoration of light fixture.

Be to be understood that, below explanation in conjunction with the embodiments is for the utility model illustrative and nonrestrictive just, in not breaking away from spirit and scope of the present utility model, can make many changes and modification to the utility model, it all will drop in the scope of the present utility model defined by the claims.

Claims

1. a light fixture is characterized in that, comprising:

AC power is converted to the power supply changeover device of the required dc source of LED;

The controller of control LED brightness and/or color is electrically connected with above-mentioned power supply changeover device;

Illuminator, be the LED-backlit module, include LED, circuit board, leaded light heat conducting element and diffused component, wherein said LED is arranged on the circuit board, and be electrically connected with described circuit board, described leaded light heat conducting element is arranged on described circuit board and the LED, and described diffused component is arranged on the described leaded light heat conducting element; Described illuminator is electrically connected with described controller by circuit board.

2. light fixture as claimed in claim 1 is characterized in that: be provided with through hole near the described circuit onboard led, described leaded light heat conducting element pours in the described through hole simultaneously, and extends to the below of described circuit board.

3. light fixture as claimed in claim 2 is characterized in that: described through hole perisporium is provided with Copper Foil, contacts with the Copper Foil of described fixed L ED.

4. as claim 2 or 3 described light fixtures, it is characterized in that: also include reflecting element, be arranged between described circuit board below and the leaded light heat conducting element, have the perforation corresponding to described through hole, described leaded light heat conducting element pours in the described perforation.

5. light fixture as claimed in claim 1 is characterized in that: described illuminator includes at least one group of LED, and every group of LED comprises monochromatic LED or multi-colored led.

6. light fixture as claimed in claim 5 is characterized in that: described monochromatic LED is at least one white, redness, blueness or green LED; Described multi-colored led for red, blueness and green LED be one group.

7. light fixture as claimed in claim 5 is characterized in that: described monochromatic LED group or for rectangular arranged, or be rounded projections arranged.

8. light fixture as claimed in claim 5 is characterized in that: described every group multi-colored led or for rectangular arranged, or be rounded projections arranged, multi-colored led group or be rectangular arranged, or be rounded projections arranged.

9. light fixture as claimed in claim 1 is characterized in that: also include metal shell or plastic casing, above-mentioned each parts are contained in the described shell.