CN108397723B - Prevent little bright LED ceiling lamp - Google Patents
Prevent little bright LED ceiling lamp Download PDFInfo
- Publication number
- CN108397723B CN108397723B CN201810415629.0A CN201810415629A CN108397723B CN 108397723 B CN108397723 B CN 108397723B CN 201810415629 A CN201810415629 A CN 201810415629A CN 108397723 B CN108397723 B CN 108397723B
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- China
- Prior art keywords
- led lamp
- led
- shell
- lamp strip
- capacitor
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
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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
- F21V15/00—Protecting lighting devices from damage
- F21V15/02—Cages
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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
- F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
- F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
- F21V17/16—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting
- F21V17/164—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting the parts being subjected to bending, e.g. snap joints
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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
- F21V23/00—Arrangement of electric circuit elements in or on lighting devices
- F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
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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
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
- F21V29/83—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
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- 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]
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
The invention discloses a micro-brightness prevention LED ceiling lamp which comprises an LED lamp shell, an LED lamp driver and a plurality of LED lamp strip plates, wherein the LED lamp driver comprises a driving shell, a non-isolated LED driving circuit is accommodated in the driving shell, the driving shell is divided into an upper shell and a lower shell, a set number of LED lamp strip mounting grooves are formed in the connecting surface of the upper shell and the lower shell, the LED lamp strip plates are mounted in the LED lamp strip mounting grooves, the LED lamp strip plates are clamped in the LED lamp strip mounting grooves after the upper shell and the lower shell are buckled, a set number of nut mounting grooves for accommodating mounting nuts are formed in the top surface of the upper shell, and the lower shell is provided with through holes corresponding to the nut mounting grooves; the non-isolation type LED driving circuit comprises a rectifying circuit, the bridge type rectifying front stage is connected with a capacitor pin, the other pin of the capacitor is grounded, the driving shell is provided with a nut mounting groove, the installation is convenient and quick, the connection of the wiring terminals is quick and convenient, and the problem of micro-brightness of the lamp is effectively prevented.
Description
Technical Field
The invention belongs to the technical field of LED lamps, and particularly relates to a slight-bright-prevention LED ceiling lamp.
Background
The LED lamp is favored by consumers due to the reasons of power saving, high brightness and the like, and particularly, the LED ceiling lamp is comprehensively popularized due to neatness and convenience.
Due to some reasons, the difference of electrician levels in home decoration and the requirements of special occasions, the live wires of the switch zero lines of many homes or other places are reversely connected, and the switch controls the zero lines, so that the lamps are always electrified, and the phenomenon that non-isolated LED lamps (including energy-saving lamps) are slightly bright or flash when the switch is turned off is caused. This leads to several problems, one is that the lamp is charged all year round, which results in greatly shortened life span, frequent replacement, and cost of money and manpower, and the other is that the quality of sleep of a person sleeping under the lamp is reduced due to night light emission, which affects health. The existing solution is either zero line to line or replacement of the isolation drive. However, the isolated driving efficiency is generally lower than that of the non-isolated driving, and the isolated driving efficiency is large and high in price, so that the isolated driving efficiency is not suitable for the design requirements of the built-in lamp, and the problem of slight brightness cannot be solved only by improving the slight brightness.
Disclosure of Invention
The invention aims to provide a slight-brightness-preventing LED ceiling lamp, which aims to solve the problems.
In order to solve the technical problem, the invention aims to realize that:
the utility model provides a prevent little bright LED ceiling lamp, includes LED lamps and lanterns shell, LED lamps and lanterns drive, a plurality of LED lamp slat, its characterized in that: the LED lamp drive comprises a drive shell, a non-isolated LED drive circuit is accommodated in the drive shell, the drive shell is divided into an upper shell and a lower shell, a set number of LED lamp strip installation grooves are formed in the connecting surface of the upper shell and the lower shell, LED lamp strip plates are installed in the LED lamp strip installation grooves, the LED lamp strip plates are clamped in the LED lamp strip installation grooves after the upper shell and the lower shell are buckled, a set number of nut installation grooves for accommodating installation nuts are formed in the top surface of the upper shell, and through holes corresponding to the nut installation grooves are formed in the lower shell;
the non-isolated LED driving circuit comprises a rectifying circuit, a filtering circuit and a constant current control circuit, the rectifying circuit is bridge rectification, the bridge rectification preceding stage is connected with one pin of a capacitor, the other pin of the capacitor is grounded, the external end of a lead of the non-isolated LED driving circuit is fixedly connected with a power supply wiring connector and a grounding wiring connector, and the grounding pin of the capacitor is communicated with an LED lamp shell through a lead and is also communicated with the grounding wiring terminal.
On the basis of the above scheme and as a preferable scheme of the scheme: the upper shell is provided with heat dissipation holes.
On the basis of the above scheme and as a preferable scheme of the scheme: the upper shell is provided with a notch, and the power supply wiring connector and the grounding wiring connector are exposed to the notch.
On the basis of the above scheme and as a preferable scheme of the scheme: the LED lamp strip board is divided into a first LED lamp strip board and a second LED lamp strip board, LED lamp beads on the first LED lamp strip board are arranged in a single row, and LED lamp beads on the second LED lamp strip board are arranged in double rows.
On the basis of the above scheme and as a preferable scheme of the scheme: the first LED light bar plate and the second LED light bar plate are arranged in a staggered mode.
On the basis of the above scheme and as a preferable scheme of the scheme: the capacitor is a nano-scale or pico-scale capacitor.
On the basis of the above scheme and as a preferable scheme of the scheme: and the grounding wiring terminal is connected with the LED lamp shell through a wire.
Compared with the prior art, the invention has the outstanding and beneficial technical effects that: the technical scheme that the energy storage device can be solved only by using one capacitor and one grounding is simple, low in cost and reliable, the technical scheme is simple and easy to implement, grounding can be realized more simply than the traditional scheme, the problem that a lamp bead is slightly bright due to reverse connection of a live wire and a zero wire is solved, the effect is good, the traditional scheme uses the isolation power supply, discharging still can be generated on the energy storage element, and only the amplitude is reduced due to the existence of an isolation transformer. The invention fundamentally solves the series resonance between the energy storage inductor and the energy storage electrolysis, and solves the problem of discharge once and for all before the bridge.
Simultaneously, this drive casing sets up nut mounting groove, and simple to operate is quick, sets up binding post and connects more quick convenience.
Drawings
FIG. 1 is a schematic diagram of a prior art non-isolated drive circuit;
FIG. 2 is a schematic diagram of a non-isolated driver circuit according to the present invention;
FIG. 3 is a partially enlarged schematic diagram of the ground capacitor circuit of the present invention;
FIG. 4 is a schematic diagram of an LED lamp driving structure according to the present invention;
FIG. 5 is a schematic view of a lamp structure according to the present invention.
Detailed Description
In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to fig. 1-5 in the embodiments,
the trace main reasons of the lamp beads are as follows:
1. non-isolated lamp driving characteristics
Several variations of the BUCK circuitry are now available for non-isolated driving of different lamps on the market. Several typical operating circuits are given below, see fig. 1-3 in detail, and all of them have a common feature, namely that the LED lamp beads are suspended, are not directly connected with the bridge-rectified ground, and are floating, and when in operation, there is a voltage difference between them and the ground (the ac input 220 × 1.414-the voltage difference of lamp bead voltage ≧ 200V) (the parallel voltage of lamp bead string is different, and is the basis for causing the lamp to be brightly lighted.
2. According to the classification of national standard GB7000.1-2002 and IEC 60598-1: 2003 latest standard
One type of lamp, class i, is defined as follows:
the protection of the lamp against electric shock not only relies on basic insulation but also includes additional safety measures, namely the connection of accessible conductive parts to a protective earth conductor in the fixed circuit, so that the accessible conductive parts are not charged in case of a basic insulation failure, i.e. the lamp must be safely earthed;
3. technical reason for slight brightness of LED lamp beads
Since the live and neutral wires are connected in reverse, the drive input and output always have 220V AC voltage difference to the ground, and the drive is not working only because no loop is formed. However, in the process of back-and-forth charging and discharging of the alternating voltage 50HZ by filtering electrolysis connected after bridge rectification, certain impulse and discharge ripple current F is generated and flows to the energy storage inductor at the rear end through the way of the following graph, LC high-frequency oscillation is generated in the process of electrolysis and charging and discharging of the inductor, and the oscillation frequency is
The frequency of the oscillation is related to the inductance and capacitance and the frequency of the oscillation current superimposed on the system, and the frequency of the oscillation driven by the non-isolated LED is very high, and is a high frequency oscillation.
LED lamp beads of the lamp are attached to the aluminum substrate (as shown in the figure), the copper foils attached to the aluminum substrate and the lamp beads are isolated by the insulated PP cloth and the heat conducting glue, a capacitor is naturally formed, the capacity of the capacitor is in direct proportion to the area of the aluminum substrate and the area of the copper foils, and the larger the aluminum substrate is, the larger the copper clad is, and the larger the capacity of the capacitor is. Typically with capacities of tens of PF to a few NF. And aluminium base board is fixed on the metal chassis by the metal screw, is equivalent to this PF level's electric capacity one end and is connected with the lamp pearl like this, and one end is connected with the chassis.
As mentioned above, a lamp of this type must be chassis grounded, so that this capacitor is connected to ground. According to the capacitance reactance formula Xc ═ 1/(2 pi fC), where Xc is the capacitance reactance in ohms, f is the frequency of the current applied across the capacitor, and C is the capacitance of this capacitor. The higher the f-frequency of the high-frequency signal, the larger the capacitance C of the capacitor, the smaller the impedance Xc, that is, the easier the current passes through. And several hundreds of K high frequency signals are equivalent to short circuit for PF level capacitor, so that the high frequency signals can smoothly flow to the aluminum substrate from the pins of the LED lamp beads. Therefore, when the switch is switched off, the live wire zero line is reversely connected, the lamp is electrified and grounded, the high-frequency voltage on the copper foil on the lamp bead is discharged to the ground through the capacitor to form a loop, so that the LED lamp bead works all the time and emits light to form slight brightness.
The reason for forming the micro-brightness is found out, and is caused by that the lamp is always electrified and high-frequency voltage is formed by LC series resonance formed by charging and discharging of alternating voltage on electrolysis after bridge rectification and inductance, and a mode is sought for solving the problem. The problem of slight brightness of the LED lamp bead can be solved as long as the high-frequency electric signal is removed.
A nano-method (nF) stage capacitor is added before bridge rectification and is connected with the ground, so that the 50Hz low-frequency charging voltage F of a high-frequency electric signal generated by electrolysis is firstly discharged to the ground through the small-capacity capacitor, and the voltage is not added to a rear-stage energy storage inductor to form LC series resonance. The formula is Xc 1/(2 pi fC), wherein the smaller C, the better the filtering performance for the low-frequency model F, and the ceramic chip capacitor of 2200pF is actually selected, and the filtering performance for the ripple voltage generated by electrolyzing the AC voltage of 50HZ is the best. Therefore, the reason that the LED lamp beads are slightly bright due to the fact that high-frequency signals are generated and discharged through the capacitor naturally formed by the aluminum substrate is eliminated.
The capacitor added in front of the bridge is directly connected with the ground and is connected with the ground by a terminal, so that the ground of a client is skillfully combined with the ground used by the solution, one ground is shared, and the problems of slight brightness of the lamp beads and grounding are simply and clearly solved.
The LED lamp driving device comprises a driving shell 10, wherein a non-isolated LED driving circuit is accommodated in the driving shell 10 and comprises a rectifying circuit, a filtering circuit and a constant current control circuit, the rectifying circuit is bridge rectification, the bridge rectification preceding stage is connected with a capacitor CAP pin, the other pin of the capacitor CAP is grounded, the external end of a lead of the non-isolated LED driving circuit is fixedly connected with a power supply wiring connector and a grounding wiring connector 14, and the grounding pin of the capacitor CAP is communicated with an LED lamp shell 40 through a lead 50 and is also communicated with the grounding wiring terminal.
The upper case 15 is provided with heat radiating holes 11.
The nut mounting groove 12 has a hexagonal structure.
The non-isolated LED driving circuit is provided with a power supply and a grounding wiring terminal 14, the upper shell 15 is provided with a notch 13, and the power supply and grounding wiring terminal 14 are exposed in the notch 13.
The power and ground terminals 14 are quick terminals.
The LED lamp strip board is divided into a first LED lamp strip board 20 and a second LED lamp strip board 30, LED lamp beads 21 on the first LED lamp strip board 20 are arranged in a single row, LED lamp beads on the second LED lamp strip board 30 are arranged in a double row, the first LED lamp strip board 20 and the second LED lamp strip board 30 are arranged in a staggered mode, the arrangement structure can enable light to be emitted more evenly when the cost of the lamp beads is reduced, and the brightness can also meet the using requirement.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (5)
1. The utility model provides a prevent little bright LED ceiling lamp, includes LED lamps and lanterns shell, LED lamps and lanterns drive, a plurality of LED lamp slat, its characterized in that: the LED lamp drive comprises a drive shell, a non-isolated LED drive circuit is accommodated in the drive shell, the drive shell is divided into an upper shell and a lower shell, a set number of LED lamp strip installation grooves are formed in the connecting surface of the upper shell and the lower shell, LED lamp strip plates are installed in the LED lamp strip installation grooves, the LED lamp strip plates are clamped in the LED lamp strip installation grooves after the upper shell and the lower shell are buckled, a set number of nut installation grooves for accommodating installation nuts are formed in the top surface of the upper shell, and through holes corresponding to the nut installation grooves are formed in the lower shell;
the non-isolated LED driving circuit comprises a rectifying circuit, a filtering circuit and a constant current control circuit, wherein the rectifying circuit is in bridge rectification; the LED lamp comprises an LED lamp shell and is characterized by further comprising a capacitor, wherein the capacitor consists of a copper foil of the LED lamp strip plate, an aluminum substrate of the LED lamp strip plate and an insulating layer positioned between the copper foil and the aluminum substrate, the insulating layer consists of PP cloth and heat conducting glue, the copper foil is connected with one input end of the bridge rectifier, the aluminum substrate is fixed on a metal chassis of the LED lamp shell through metal screws, the non-isolated LED driving circuit is provided with a lead external end, the lead external end is fixedly connected with a power supply wiring connector and a grounding wiring connector, and the grounding wiring connector is connected with the LED lamp shell through a lead;
the LED lamp strip plate is divided into a first LED lamp strip plate and a second LED lamp strip plate, and the first LED lamp strip plate and the second LED lamp strip plate are arranged in a staggered mode.
2. The anti-micro-brightness LED ceiling lamp according to claim 1, characterized in that: the upper shell is provided with heat dissipation holes.
3. The anti-micro-brightness LED ceiling lamp according to claim 1, characterized in that: the upper shell is provided with a notch, and the power supply wiring connector and the grounding wiring connector are exposed to the notch.
4. The anti-micro-brightness LED ceiling lamp according to claim 1, characterized in that: LED lamp pearl is the single row setting on the first LED slat, LED lamp pearl on the second LED slat is double setting.
5. The anti-micro-brightness LED ceiling lamp according to claim 1, characterized in that: the capacitor is of a nano-farad level or a pico-farad level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810415629.0A CN108397723B (en) | 2018-05-03 | 2018-05-03 | Prevent little bright LED ceiling lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810415629.0A CN108397723B (en) | 2018-05-03 | 2018-05-03 | Prevent little bright LED ceiling lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108397723A CN108397723A (en) | 2018-08-14 |
| CN108397723B true CN108397723B (en) | 2020-12-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810415629.0A Expired - Fee Related CN108397723B (en) | 2018-05-03 | 2018-05-03 | Prevent little bright LED ceiling lamp |
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| Country | Link |
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| CN (1) | CN108397723B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203771345U (en) * | 2014-02-20 | 2014-08-13 | 无锡中科智联科技研发中心有限公司 | LED sensing lamp adjustable in brightness of dim light and adjustable in full bright delay duration |
-
2018
- 2018-05-03 CN CN201810415629.0A patent/CN108397723B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203771345U (en) * | 2014-02-20 | 2014-08-13 | 无锡中科智联科技研发中心有限公司 | LED sensing lamp adjustable in brightness of dim light and adjustable in full bright delay duration |
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| Publication number | Publication date |
|---|---|
| CN108397723A (en) | 2018-08-14 |
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