CN110446296A - A kind of LED light bar of brightness uniformity - Google Patents
A kind of LED light bar of brightness uniformity Download PDFInfo
- Publication number
- CN110446296A CN110446296A CN201910613583.8A CN201910613583A CN110446296A CN 110446296 A CN110446296 A CN 110446296A CN 201910613583 A CN201910613583 A CN 201910613583A CN 110446296 A CN110446296 A CN 110446296A
- Authority
- CN
- China
- Prior art keywords
- circuit
- voltage detection
- cabling
- voltage
- strip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S4/00—Lighting devices or systems using a string or strip of light sources
- F21S4/20—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports
- F21S4/22—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports flexible or deformable, e.g. into a curved shape
- F21S4/24—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports flexible or deformable, e.g. into a curved shape of ribbon or tape form, e.g. LED tapes
-
- 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]
Abstract
The invention discloses a kind of LED light bars of brightness uniformity, it include: strip circuit plate, positive cabling, cathode cabling and the voltage detection cabling being arranged on the length direction of the strip circuit plate, several LED light strings are electrically connected between the anode cabling and the voltage detection cabling, the strip circuit front edge of board is equipped with power circuit and voltage detection circuit, and the output end of the voltage detection circuit is connect with the input terminal of the power circuit.The present invention detects the voltage of each lamp string of strip circuit plate by voltage detection circuit, and it is transmitted to the power circuit, the power circuit is according to the voltage of the strip circuit plate, automatically adjust output voltage, guarantee the operating voltage of each lamp string in rated range, keep lamp bar head and the tail voltage consistent, it is inconsistent to solve lamp bar head and the tail brightness, it generates heat inconsistent problem, improves the service life of lamp bar.
Description
Technical field
The present invention relates to LED technology fields, more particularly, to a kind of LED light bar of brightness uniformity.
Background technique
In LED illumination industry, LED light bar is more and more common to be used on a large scale as Linear lighting illuminating source.Lamp bar one
As be strip, length meter is differed from several centimeters to tens, and electrical vector can be flexible circuit board or hard circuit board.With
Generally termination power when family is installed, the then luminous work of whole product.
In existing LED conventional circuit design, be difficult the Railway Project avoided: 1. due to electrical current carriers linear voltage
Drop, it is inconsistent that product will appear head and the tail brightness, brighter closer to power end；2. since all electric currents are all defeated by power end
Enter, so the carrying object fever close to power end is far longer than distal end, to cause the light decay of whole product and service life inconsistent.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, of the invention
One purpose is to provide a kind of LED light bar of brightness uniformity.
The technical scheme adopted by the invention is that:
A kind of LED light bar of brightness uniformity, comprising: strip circuit plate is arranged on the length direction of the strip circuit plate
Positive cabling, cathode cabling and voltage detection cabling, it is described anode cabling and the voltage detection cabling between be electrically connected
There are several LED light strings,
The strip circuit front edge of board is equipped with power circuit and voltage detection circuit, the output end of the voltage detection circuit
Connect with the input terminal of the power circuit, the power circuit includes cathode output end mouth and cathode output end mouth, it is described just
Pole output port is connect with the port that the positive cabling is located at the strip circuit front edge of board, the cathode output end mouth passes through
The cathode cabling is connect with the port that the voltage detection cabling is located at the strip circuit plate tail end；
The voltage detection circuit includes voltage detection port, before the voltage detection cabling is located at the strip circuit plate
The port at end is connect with the voltage detection port；
The voltage detection circuit is used to detect the voltage of strip circuit plate tail portion, and is transmitted to the power supply electricity
Road, the power circuit adjust output voltage according to the voltage of strip circuit plate tail portion.
Further, the power circuit includes that AC current rectifying and wave filtering circuit, transformer and DC rectify/switch pressure regulation electricity
The output end on road, the AC current rectifying and wave filtering circuit is connect with the input terminal of the transformer, the output end of the transformer and institute
The input terminal connection that DC rectified/switched regulating circuit is stated, the DC rectifies/switchs regulating circuit and includes cathode output end mouth and bear
Pole output port, the input terminal that the output end of the voltage detection circuit rectified/switch regulating circuit with the DC are connect.
Further, the LED light string includes 6 LED lamp beads.
Further, the strip circuit plate is flexible circuit board.
The beneficial effects of the present invention are:
The present invention detects the voltage of each lamp string of strip circuit plate by voltage detection circuit, and is transmitted to the power supply electricity
Road, the power circuit automatically adjust output voltage according to the voltage of the strip circuit plate, guarantee the work electricity of each lamp string
It is pressed in rated range, keeps lamp bar head and the tail voltage consistent, it is inconsistent to solve lamp bar head and the tail brightness, inconsistent problem of generating heat,
Improve the service life of lamp bar.
Detailed description of the invention
Fig. 1 is the circuit connection diagram of embodiment 1 in the present invention；
Fig. 2 is the circuit connection diagram of embodiment 2 in the present invention.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.
With the increase of lamp bar length, since carrying object itself is there are voltage drop caused by impedance, the electricity between positive and negative anodes
Pressure can be smaller and smaller, that is, the voltage loaded on each electric unit can become smaller with the increase of distance, to cause bright
Spend difference.
As shown in Figure 1, it illustrates a kind of LED light bars of brightness uniformity comprising: strip circuit plate, strip circuit plate
Circuit board can be flexible circuit board or hard circuit board, such as FPC, aluminum substrate, FR4 plate, it is preferred that strip circuit plate is aluminium
Substrate.Positive cabling 1, cathode cabling 2 and the voltage detection cabling 3 being arranged on the length direction of strip circuit plate, anode is walked
Several LED light strings 4 (each LED light string is mutually in parallel), the quantity root of lamp bead are electrically connected between line 1 and voltage detection cabling 3
It is determined according to input voltage, it is preferred that LED light string includes 6 LED lamp beads.Strip circuit front edge of board is equipped with power circuit 5 and voltage
Detection circuit 6, power circuit 5 include cathode output end mouth and cathode output end mouth, and cathode output end mouth is located at positive cabling 1
The port connection of the strip circuit front edge of board, cathode output end mouth are located at by the cathode cabling and voltage detection cabling 3
The port of the strip circuit plate tail end connects；Voltage detection circuit includes voltage detection port, and voltage detection cabling 3 is located at item
The port of shape circuit front edge of board is connect with the voltage detection port；The output end of voltage detection circuit 6 is defeated with power circuit 5
Enter end connection, voltage detection circuit 6 is used to detect the voltage of each lamp string on the strip circuit plate (simultaneously due to each lamp string
Connection, therefore voltage is equal), and be transmitted to power circuit 5, the power circuit according to the voltage of strip circuit plate tail portion,
Adjust output voltage.
As shown in Fig. 2, power circuit includes that AC current rectifying and wave filtering circuit, transformer and DC rectify/switch regulating circuit, institute
The output end for stating AC current rectifying and wave filtering circuit is connect with the input terminal of the transformer, and the output end of the transformer and the DC are whole
The connection of stream/switch regulating circuit input terminal, it includes cathode output end mouth and cathode output that the DC, which rectifies/switch regulating circuit,
Port, the input terminal that the output end of the voltage detection circuit rectified/switch regulating circuit with the DC are connect.
Wherein, AC current rectifying and wave filtering circuit is for being handled and being gone noise wave removing to AC sinusoidal waveform.Transformer will be for that will hand over
Galvanic electricity voltage is converted into output DC voltage range peak or representative value, and DC rectifies/switch regulating circuit for according to voltage
The strip circuit plate tail voltage value of the feedback of detection circuit, regulating switch value is to adjust output voltage in corresponding range.
Keep lamp bar head and the tail voltage consistent, solves that lamp bar head and the tail brightness is inconsistent, and inconsistent problem of generating heat improves the use of lamp bar
Service life.
It is to be illustrated to preferable implementation of the invention, but the invention is not limited to the implementation above
Example, those skilled in the art can also make various equivalent variations on the premise of without prejudice to spirit of the invention or replace
It changes, these equivalent deformations or replacement are all included in the scope defined by the claims of the present application.
Claims (4)
1. a kind of LED light bar of brightness uniformity characterized by comprising strip circuit plate, the length side of the strip circuit plate
Positive cabling, cathode cabling and the voltage detection cabling set up, it is described anode cabling and the voltage detection cabling it
Between be electrically connected with several LED light strings,
The strip circuit front edge of board is equipped with power circuit and voltage detection circuit, the output end of the voltage detection circuit and institute
The input terminal connection of power circuit is stated, the power circuit includes cathode output end mouth and cathode output end mouth, and the anode is defeated
Exit port is connect with the port that the positive cabling is located at the strip circuit front edge of board, the cathode output end mouth is described in
Cathode cabling is connect with the port that the voltage detection cabling is located at the strip circuit plate tail end；
The voltage detection circuit includes voltage detection port, and the voltage detection cabling is located at the strip circuit front edge of board
Port is connect with the voltage detection port；
The voltage detection circuit is used to detect the voltage of each lamp string of strip circuit plate, and is transmitted to the power supply electricity
Road, the power circuit adjust output voltage according to the voltage of each lamp string of strip circuit plate.
2. the LED light bar of brightness uniformity according to claim 1, which is characterized in that the power circuit includes AC rectification
Filter circuit, transformer and DC rectify/switch regulating circuit, the output end and the transformer of the AC current rectifying and wave filtering circuit
Input terminal connection, the input terminal that the output end of the transformer rectified/switch regulating circuit with the DC connect, and the DC is whole
Stream/switch regulating circuit includes cathode output end mouth and cathode output end mouth, the output end of the voltage detection circuit with it is described
DC rectifies/switchs the input terminal connection of regulating circuit.
3. the LED light bar of brightness uniformity according to claim 2, which is characterized in that the LED light string includes 6 LED light
Pearl.
4. the LED light bar of brightness uniformity according to any one of claims 1 to 3, which is characterized in that the strip circuit plate
For flexible circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910613583.8A CN110446296A (en) | 2019-07-09 | 2019-07-09 | A kind of LED light bar of brightness uniformity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910613583.8A CN110446296A (en) | 2019-07-09 | 2019-07-09 | A kind of LED light bar of brightness uniformity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110446296A true CN110446296A (en) | 2019-11-12 |
Family
ID=68429897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910613583.8A Pending CN110446296A (en) | 2019-07-09 | 2019-07-09 | A kind of LED light bar of brightness uniformity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110446296A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150076999A1 (en) * | 2013-09-16 | 2015-03-19 | Dialog Semiconductor Inc. | Modifying Duty Cycles of PWM Drive Signals to Compensate for LED Driver Mismatches in a Multi-Channel LED System |
| CN205946248U (en) * | 2016-07-07 | 2017-02-08 | 广东欧曼科技股份有限公司 | Can adjust emergency light area of luminance |
| CN109936896A (en) * | 2019-04-23 | 2019-06-25 | 珠海其美光电科技有限公司 | A kind of control device suitable for the illumination of LED line shape |
-
2019
- 2019-07-09 CN CN201910613583.8A patent/CN110446296A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150076999A1 (en) * | 2013-09-16 | 2015-03-19 | Dialog Semiconductor Inc. | Modifying Duty Cycles of PWM Drive Signals to Compensate for LED Driver Mismatches in a Multi-Channel LED System |
| CN205946248U (en) * | 2016-07-07 | 2017-02-08 | 广东欧曼科技股份有限公司 | Can adjust emergency light area of luminance |
| CN109936896A (en) * | 2019-04-23 | 2019-06-25 | 珠海其美光电科技有限公司 | A kind of control device suitable for the illumination of LED line shape |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191112 |