CN103697417B - A kind of LED of high-power high-color rendering tunable optical - Google Patents

Abstract

The invention relates to a high-power, high-color-rendering dimmable LED lamp, which consists of an upper end cover, a light output window, a main housing, several side wall LED modules installed in the main housing, and coated with a semi-transparent and semi-reflective optical film. And it is composed of an upper prism platform and a lower prism platform fixed in the central cavity of the main housing, a lower LED module and a lower housing. Each side wall LED module includes two upper and lower LEDs, which are two of the three single-color LEDs of red, green and blue. Another monochromatic LED is installed on the corresponding position of the lower LED module. The light emitted by the red, green and blue monochromatic LEDs is mixed by the upper prism stage and the lower prism stage. Each LED module is directly and fixedly connected with the main housing or the lower housing provided with heat sinks, so that the heat dissipation is good. Three sets of independent drive and control circuits respectively drive and adjust the luminous intensity of three single-color LEDs, and can flexibly adjust the ratio of the three primary colors in the outgoing light according to the environment, and adapt to the high color rendering requirements of different occasions.

Description

A high-power, high-color-rendering, dimmable LED lamp

technical field

The invention relates to the field of optoelectronic technology, in particular to a high-power, high-color-rendering, dimmable LED lamp.

Background technique

Common indoor and outdoor lighting and various special lighting occasions such as photography, videography, museums, and underwater have higher and higher requirements for the power and color rendering of LED lamps.

High color rendering LED lamps have high technical content and are high-end products, which are very important for improving the international competitiveness of my country's LED industry. To improve color rendering, in principle, the combination of RGB three primary colors is required. At present, there are three main implementation methods: multi-primary color phosphor, RGB combination chip or blue chip plus multi-color phosphor. These methods are to directly realize the mixing of light in the packaging structure of a single LED lamp bead to prepare white LED lamp beads, and then use single or multiple white light LED lamp beads to combine to prepare lamp products. The light mixing effect of this type of lamp is relatively ideal, but it is difficult to adjust the light color quality and adapt to the change of the lighting environment. For example, when the air quality changes under terrestrial lighting conditions, or the water body composition changes under underwater lighting conditions, the relative degrees of scattering and absorption of different wavelengths of light emitted by the luminaire will also change. If the light color of the lamp cannot be effectively adjusted accordingly, it will greatly affect the actual lighting effect, and cannot meet the requirements of high color rendering under different environmental conditions.

At the same time, as the power of lamps increases, the problem of heat dissipation becomes more and more prominent. If the heat dissipation is not good and the temperature rises, it will cause the light decay and light color change of the LED, reduce the color rendering, and greatly shorten the life of the LED.

Contents of the invention

The technical problem to be solved by the present invention is to provide an LED lamp with compact structure, fast heat dissipation, high power, dimmable light, and high color rendering under different lighting environments.

The technical solution adopted by the present invention to solve the above technical problems is: a high-power, high-color-rendering dimmable LED lamp, which is provided with a main housing and a lower housing, and the upper end of the main housing is fixedly equipped with a light-emitting window and an upper end. Cover, the lower end of the main shell is connected and fixed with the lower shell, the center hole at the bottom of the lower shell is equipped with a fixed joint, and the cable is locked and fixed through the fixed joint. It is characterized in that: the inner wall of the main shell is vertically provided with several grooves , a group of side wall LED modules are installed on the vertical plane of each groove, and each group of side wall LED modules consists of an aluminum substrate, a high-power red LED and a matching reflector, a high-power green LED and a matching reflector The upper prism platform, the lower prism platform, and the lower LED module are sequentially fixed in the center of the main shell from top to bottom; the outer surfaces of the upper prism platform and the lower prism platform are coated with semi-transparent and semi-reflective optical films , the optical film on the upper prism stage reflects light with a wavelength greater than 630 nm and transmits light with a wavelength less than 600 nm; the optical film on the lower prism stage reflects light with a wavelength greater than 490 nm and transmits light with a wavelength less than 450 nm; the upper prism stage and each prism surface of the lower prism stand form an included angle of 45 ^° with the bottom surface of the corresponding prism stand; the lower end LED module consists of an aluminum substrate, a central high-power white LED, and high-power blue LEDs uniformly arranged and installed around it and supporting components. The reflector cup is formed; the outer wall corresponding to the groove in the main shell is vertically provided with a groove wall cooling fin, and the outer wall between the grooves is also vertically provided with an inter-groove cooling fin; the outer wall of the lower casing is also provided with There is a heat sink, and the lower shell is an electrical cavity, with a built-in LED driver and control module; the LED driver and control module adopts a high-precision constant current chip, a wide input voltage design, and dimming through PWM technology of pulse width modulation; the whole The drive and control module is divided into three independent circuits: red LED drive and control circuit, green LED drive and control circuit, and lower LED drive and control circuit, which are used to control red LED, green LED and lower LED modules respectively. Blue LEDs and white LEDs.

In the structure of the above high-power, high-color-rendering dimmable LED lamp, the inner wall of the main housing is provided with an upper prism table and a lower prism table slot, and the protruding corners of the lower bottom surfaces of the upper prism table and the lower prism table are installed In the corresponding card slot of the main housing, it is ensured that the prism table will not rotate in the inner cavity of the main housing after installation; On the optical axis of the green LED.

In the structure of the high-power high-color-rendering dimmable LED lamp described above, the connection between the upper end cover and the light output window, and between the light output window and the main housing is respectively provided with an upper end cover buffer pad and a light output window buffer pad.

Advantages and effects of the present invention: With the above-mentioned structure, the emitted light of the high-power, high-color-rendering dimmable LED lamp of the present invention is produced by the red and green LEDs in the side wall LED module of the main housing and the lower LED module. The output light of the blue LED in the middle is mixed after passing through the upper prism stage and the lower prism stage, and is supplemented by the white LED in the lower LED module. The light emitted by each LED is fully utilized, and the ideal light mixing effect can be obtained. Get high color rendering. The driving and control circuits of red, green and blue LEDs are independent of each other, and the light color of the outgoing light can be flexibly adjusted according to needs, so that the lamps can adapt to different external environmental requirements.

Another advantage of the present invention is that the upper end cover, the main shell and the lower shell are all made of high thermal conductivity materials. The inner side wall of the main housing is designed with a groove structure, and the outer side wall corresponding to the groove and the outer side wall between the grooves are respectively provided with cooling fins on the groove wall and cooling fins between the grooves. Mount the LED module on the side wall on the vertical plane of the groove of the main casing through thermal conductive glue to form a good heat dissipation. The aluminum substrate of the lower LED module is connected and fixed with the main casing and the lower casing through metal locking screws, and the outer wall of the lower casing is also provided with heat sinks. The heat generated by the lower LED module is passed through the main casing and the lower casing. Distributed outward, also has good heat dissipation.

Another advantage of the present invention is that the red and green LEDs are installed on the side wall of the main housing, so that the structure of the lamp is compact, and the overall volume of the lamp is effectively reduced. Under the same diameter of the lamp, more LEDs can be accommodated, and at the same time Make full use of the main shell and the lower shell for heat dissipation, which can ensure the stability of light color and prolong the service life of the lamp. The whole lamp is easy to install, reasonable in structure and good in maintainability.

Description of drawings

Accompanying drawing 1 is the three-dimensional exploded schematic view of one embodiment of the present invention.

Accompanying drawing 2 is the overall sectional structure schematic diagram after the structure assembly of Fig. 1.

Accompanying drawing 3 is a schematic front view of the side wall LED module in Fig. 1 .

Accompanying drawing 4 is a schematic front view of the lower LED module in Fig. 1 .

The numbers in the figure are: 1. Locking screw; 2. Upper end cover; 3. Upper end cover cushion; 4. Light exit window; 5. Light exit window cushion; 6. Upper prism stand; 7. Lower prism stand; 8. Side Wall LED module; 81. High-power red LED; 82. Supporting reflective cup; 83. High-power green LED; 84. Supporting reflective cup; 85. Aluminum substrate; 9. Main shell; 90. Groove; 91 .Slot wall heat sink; 92. Between slot heat sink; 93. Card slot; 10. Lower end LED module; 101. High-power blue LED; 102. High-power white LED; 103. Supporting reflective cup; 104. Aluminum substrate; 105. Through hole for threading guide wire; 106. Installation through hole; 11. LED drive and control module; 111. Red LED drive and control circuit; 112. Green LED drive and control circuit; 113. Lower LED drive and control Circuit; 12. Lower shell; 121. Heat sink of lower shell; 13. Fixed connector; 14. Locking screw; 15. Cable.

Detailed ways

See accompanying drawing 1-shown in accompanying drawing 4, it is the schematic diagram of preferred embodiment of the present invention. The present invention is a high-power, high-color-rendering dimmable LED lamp, which is provided with a main housing 9 and a lower housing 12, the upper end of the main housing 9 is fixed with a light outlet window 4 and an upper end cover 2, and the main housing 9. The lower end is connected and fixed with the lower casing 12, and a fixed joint 13 is installed in the outlet hole at the bottom of the lower casing 12, and the cable 15 is locked and fixed through the fixed joint. Specifically: in the lamp body, the upper end of the main housing 9 is connected to the upper end cover 2 through several locking screws 1, the light outlet window 4 is clamped between the main housing 9 and the upper end cover 2, and the upper end cover 2 and the light outlet window 4 are fixed. The upper end cover buffer pad 3 and the light outlet window buffer pad 5 are respectively provided between the light outlet window 4 and the main housing 9 . The inner side wall of the main casing 9 is vertically provided with several grooves 90, and a group of side wall LED modules 8 are installed on the vertical plane of each groove, and each group of side wall LED modules 8 is composed of an aluminum substrate 85, a large Power red light LED81 and supporting reflective cup 82, a high-power green light LED83 and supporting reflective cup 84 form. The inner wall of each groove 90 structure of the main housing 9 is a vertical plane, and the side wall LED module 8 is fixed by heat-conducting glue. An upper prism stand 6 , a lower prism stand 7 , and a lower LED module 10 are sequentially fixed in the center of the main housing 9 from top to bottom. A number of high-power blue LEDs 101 evenly distributed radially, a high-power white LED 102 in the center and matching reflective cups 103 are fixed on the aluminum substrate 104 to form the lower LED module 10 . The aluminum substrate 104 is provided with a plurality of through holes 106 for installing the locking screws 14 and a plurality of through holes 105 for passing through the wires. The lower casing 12 is connected and fixed to the aluminum base plate 104 and the main casing 9 through several metal locking screws 14 . The upper prism stand 6 and the lower prism stand 7 are fixed between the reflector cup 103 and the light exit window 4 . The cavity of the lower housing 12 is built with an LED driver and control module 11 . The LED drive and control module 11 adopts a high-precision constant current chip, a wide input voltage design, and dims light through PWM technology of pulse width modulation. The entire drive and control module is divided into a red LED drive and control circuit 111 , a green LED drive and control circuit 112 and a lower LED drive and control circuit 113 . The lower LED drive and control circuit 113 simultaneously drives and controls the blue LED 101 and the white LED 102 . The drive and control circuits 111, 112, and 113 are independent of each other, and can independently adjust the luminous intensity of the red LED, green LED, and blue LED and white LED in the lower LED module, so that the emitted light obtained after light mixing has a high display quality. Chromatic and light color adjustable. The specific composition and structure of the LED driving and control module 11 belongs to the prior art and will not be repeated here.

As shown in Fig. 1 and Fig. 2, the light source in the present invention is composed of multiple sets of sidewall LED modules 8 and lower LED modules 10, including several high-power LEDs. The side wall LED module 8 is directly installed on the vertical plane of the groove structure on the inner wall of the main housing 9 through heat-conducting glue, which greatly reduces the overall diameter and volume of the lamp. When in use, the heat emitted by the side wall LED module 8 can be dissipated directly through the main casing 9 . The lower LED module 10 is in close contact with the main housing 9 and the lower housing 12 through a number of metal locking screws 14, and thermal grease is applied on the contact surface, and the heat dissipation channel formed by the contact surface and the metal locking screws 14 can make the lower LED module The heat emitted by the group 10 is dissipated through the main case 9 and the lower case 12 . The outer wall of the main housing 9 is provided with a heat sink 91 on the groove wall and a heat sink 92 between the grooves, and the outer wall of the lower housing 12 is also provided with a heat sink 121 to ensure good heat dissipation, effectively reduce the junction temperature, and prolong the service life of the high-power LED.

Referring to accompanying drawing 1-shown in accompanying drawing 4, described main casing 9 inner wall is provided with upper prism stand 6 and lower prism stand 7 draw-in slots 93, and the protruding angle of the bottom surface of described upper prism stand 6 and lower prism stand 7 Installed in the corresponding card slot 93 of the main housing to ensure that the prism stage will not rotate in the inner cavity of the main housing after installation. The outer surface of the upper prism stand 6 is coated with a transflective optical film except the upper and lower bottom surfaces, so that it can reflect light with a wavelength greater than 630nm and transmit light with a wavelength less than 600nm. The center points of each prism surface of the upper prism stand 6 are respectively located on the optical axis of the red LED 81 at the corresponding position. The outer surface of the lower prism stand 7 is coated with a transflective optical film except the upper and lower bottom surfaces, so that it can reflect light with a wavelength greater than 490nm and transmit light with a wavelength less than 450nm. The center points of each prism surface of the lower prism stand 7 are respectively located on the optical axis of the green LED 83 at the corresponding position. The light emitted by the blue LED 101 in the lower LED module 10 passes through the upper prism stage 6 and the lower prism stage 7 and directly exits; the light emitted by the green LED 83 in the side wall LED module 8 is reflected upward by the lower prism stage 7 and passes through The upper prism stand 6 emits; the light emitted by the red LED 81 is directly reflected upward by the upper prism stand 6, and mixed with the outgoing light of the green LED 83 and the blue LED 101 to form outgoing light with high color rendering. The light emitted by the white LED 102 directly exits through the upper and lower bottom surfaces of the upper prism table 6 and the lower prism table 7 where no transflective film is coated, so as to avoid dark spots appearing in the center of the emitted light of the lamp and play the role of supplementary light. The light mixing mode of the present invention has an ideal light mixing effect, and the utilization rate of light emitted by each LED module is high. The driving and adjusting circuit 11 can independently control the luminous intensity of the red, green and blue LEDs, avoiding the problem of unstable mixed light due to the difference in light decay of the red, green and blue LEDs, and can flexibly change the mixed light at the same time. The light color of the outgoing light after the light is adapted to the change of the lighting environment and the lighting requirements in different situations.

Referring to accompanying drawings 1 to 4, the positions of high-power red, green and blue LEDs can be interchanged. Correspondingly, the wavelength range of the light that is allowed to be transmitted and reflected by the optical films coated on the outer surfaces of the upper prism stand 6 and the lower prism stand 7 needs to match the light color of the LEDs at the corresponding positions. However, due to the different light decays and luminous efficiencies of the red, green, and blue LEDs, in this embodiment, the high-power red LED 81 and the high-power green LED 83 are sequentially fixed on the aluminum substrate 85 from top to bottom together with the supporting reflective cups. 82 and 84 form the side wall LED module 8 together, and the high-power blue LED 101 and the high-power white LED 102 and the matching reflector 103 are fixed on the aluminum substrate 104 to form the lower LED module 10, which can minimize the light emitted by the red LED 81. Attenuation in the light path, while ensuring that the light emitted by the green LED83 is also fully utilized, can effectively improve the efficiency of the lamp, balance the driving current required by the red, green, and blue LEDs, and rationally distribute and utilize energy. best implementation.

It should be noted here that there may be six, eight or more groove structures on the wall surface of the main casing 9 . Correspondingly, the upper prism stage 6 and the lower prism stage 7 need to be hexagonal prisms, octagonal prisms, etc., and the number of high-power blue LEDs 101 in the lower LED module should also be six, eight or more. At the same time, the above-mentioned groups of LED modules can also be used in conjunction with various matching lenses to change the beam angle of the outgoing light.

The invention has the advantages of simple structure, scientific rationality, good heat dissipation and easy assembly. Shown in accompanying drawing 1-accompanying drawing 4, it is only preferred implementation mode of the present invention, does not limit the scope of application of the present invention with this, so all equivalent changes on the principle of the present invention all should be included in the protection of the present invention within range.

Claims (4)

1. a high-power high-color rendering light-adjustable LED lamp, it is provided with main casing, lower house, described main casing upper end is installed with light-emitting window and upper end cover, main casing lower end and lower house are connected and fixed, anchor tip is installed in lower house bottom centre hole, locked and attached cable by anchor tip, it is characterized in that: described main casing madial wall is vertically provided with some grooves, one group of sidewall LED module each groove perpendicular is equipped with, often organize sidewall LED module by aluminium base, a high-power red-light LED and supporting reflector, a high-power green light LED and supporting reflector are formed, main casing central authorities are fixed with prism platform, lower prism platform and lower end LED module from top to bottom successively, the outer surface of described upper prism platform and lower prism platform is coated with semi-transparent semi-reflecting optical thin film, optical thin film reflection wavelength in upper prism platform is greater than the light of 630 nm and transmission peak wavelength is less than the light of 600 nm, optical thin film reflection wavelength in lower prism platform is greater than the light of 490 nm and transmission peak wavelength is less than the light of 450 nm, and each prism facets of upper prism platform and lower prism platform is all 45 with the bottom surface of respective prisms platform ^oangle, the high-power blue-ray LED that described lower end LED module is installed by the large power white light LED of aluminium base, central authorities and even arrangement around and supporting reflector are formed, the outer wall that described main casing further groove is corresponding is vertically provided with cell wall fin, the outer wall between groove is also vertically provided with fin between groove, be electrical equipment cavity in described lower house, be built-in with LED and drive and control module, described LED drives and control module adopts high precision constant current chip, and wide input voltage designs, by the PWM technology light modulation of pulse width modulation, whole driving and control module are divided into red-light LED to drive and control circuit, green light LED driving and control circuit, lower end LED driving and control circuit three independently circuit, is used for respectively controlling the blue-ray LED in red-light LED, green light LED and lower end LED module and white light LEDs.

2. high-power high-color rendering light-adjustable LED lamp according to claim 1, it is characterized in that: described main casing inwall is provided with prism platform and lower prism platform draw-in groove, the coign of described upper prism platform and lower prism platform bottom surface is arranged in the corresponding draw-in groove of main casing; Each prism facets central point of described upper prism platform and lower prism platform lays respectively on the red-light LED of relevant position and the optical axis of green light LED.

3. high-power high-color rendering light-adjustable LED lamp according to claim 1, is characterized in that: described upper end cover and light-emitting window, junction between light-emitting window and main casing are respectively equipped with upper end cover cushion pad and light-emitting window cushion pad.

4. high-power high-color rendering light-adjustable LED lamp according to claim 1, is characterized in that: described lower house outer wall is also provided with fin.