CN109996364A - Lighting device - Google Patents
Lighting device Download PDFInfo
- Publication number
- CN109996364A CN109996364A CN201711476711.6A CN201711476711A CN109996364A CN 109996364 A CN109996364 A CN 109996364A CN 201711476711 A CN201711476711 A CN 201711476711A CN 109996364 A CN109996364 A CN 109996364A
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- CN
- China
- Prior art keywords
- unit
- power supply
- light emitting
- lighting device
- emitting module
- 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.)
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Classifications
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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]
Abstract
A kind of lighting device includes power supply module, light emitting module, high impedance unit, by-pass unit and voltage detecting circuit.One power supply is switched to the first DC power supply by power supply module.Light emitting module is electrically connected power supply module.High impedance unit series connection light emitting module, by-pass unit are electrically connected light emitting module, high impedance unit parallel connection by-pass unit.Voltage detecting circuit is electrically connected power supply module and by-pass unit, voltage detecting circuit has preset voltage value and first voltage, wherein when first voltage is greater than preset voltage value, by-pass unit is not turned on, and the first DC power supply flows through light emitting module and high impedance unit.When first voltage is less than preset voltage value, by-pass unit conducting, the first DC power supply flows through light emitting module and by-pass unit.
Description
Technical field
The present invention is especially a kind of to be shone with whether the conducting of photo-coupler to decide whether to start about a kind of lighting device
The overvoltage protection mechanism of bright device, and reach the lighting device that electric appliance is isolated with transformer using photo-coupler.
Background technique
Conventional fluorescent fluorescent tube need to start by electric stabilizer, however light-emitting diode lamp tube and conventional fluorescent fluorescent tube open
Flowing mode is different, so when light-emitting diode lamp tube is installed in the lamp holder of conventional fluorescent fluorescent tube, when electric stabilizer operates
Instantaneous pressure can burn the light emitting diode in light-emitting diode lamp tube, therefore compatible light-emitting diode lamp tube has been developed at present
With the stabilizer of conventional fluorescent fluorescent tube and for the excess voltage protection technology of light emitting diode, right aforementioned techniques are mostly only
For compatible two kinds of fluorescent tubes or only for the function of light emitting diode overvoltage protection, light-emitting diodes are not further contemplated
The demand of spot pipe electric appliance isolation, therefore have improved necessity.
Summary of the invention
One of main object of the present invention, which is to provide, a kind of decides whether that starting is shone with whether the conducting of photo-coupler
The lighting device of the overvoltage protection mechanism of bright device.
One of main object of the present invention is to provide a kind of illumination dress for making the isolation of lighting device electric appliance of photo-coupler
It sets.
One of main object of the present invention is to provide a kind of lighting device for making the isolation of lighting device electric appliance of transformer.
To reach above-mentioned purpose, lighting device of the invention includes power supply module, light emitting module, high impedance list
Member, by-pass unit and voltage detecting circuit.One power supply is switched to one first DC power supply by power supply module.Light emitting module electricity
Property connection power supply module.High impedance unit series connection light emitting module and by-pass unit in parallel, by-pass unit, which is electrically connected, to shine
Module.Voltage detecting circuit is electrically connected power supply module and by-pass unit, voltage detecting circuit have preset voltage value with
And first voltage, wherein by-pass unit is not turned on, and the first DC power supply flows through luminous when first voltage is greater than preset voltage value
Module and high impedance unit.When first voltage is less than preset voltage value, by-pass unit conducting, the first DC power supply flows through luminous
Module and by-pass unit.
Using by-pass unit and voltage detecting circuit, lighting device of the invention is through voltage detecting circuit detection first
Whether voltage is less than preset voltage value, when first voltage is excessive, to utilize high impedance unit whether determining by-pass unit conducting
Protecting light emitting module not will receive the damage of high pressure, and on the one hand specific embodiment, by-pass unit are optocouplers one of according to the present invention
Clutch itself has the effect of electric appliance isolation, so can increase the safety of lighting device of the invention, in addition, of the invention
Lighting device in transformer also can reach electric appliance isolation effect.
Detailed description of the invention
Fig. 1 is the block diagram of an embodiment of lighting device of the invention.
Fig. 2 is the circuit diagram of an embodiment of lighting device of the invention.
Wherein appended drawing reference are as follows:
1 power supply module 10 of lighting device
Power connector end 11,11a, 11b, 11c transformer unit 12
First rectification circuit unit, 13 light emitting module 20
30 by-pass unit 40 of high impedance unit
41 receiving end 42 of transmitting terminal
50 second rectification circuit unit 51 of voltage detecting circuit
52 switch unit 53 of partial pressure unit
Simulate filament 14,14a
Specific embodiment
For that can allow your juror that can know more about technology contents of the invention, spy lifts preferred embodiment and is described as follows.
Circuit block diagram and circuit diagram please also refer to Fig. 1 and Fig. 2 about an embodiment of lighting device of the invention below.
As shown in Figure 1, lighting device 1 of the invention includes power supply module 10, light emitting module 20, high impedance unit
30, by-pass unit 40 and voltage detecting circuit 50, wherein power supply module 10 is to switch to the first direct current for a power supply
Source, light emitting module 20 are electrically connected power supply module 10, the series connection light emitting module 20 of high impedance unit 30 and by-pass unit in parallel
40, by-pass unit 40 is electrically connected light emitting module 20, and voltage detecting circuit 50 is electrically connected power supply module 10 and bypass is single
Member 40.Voltage detecting circuit 50 has preset voltage value and first voltage, wherein when first voltage is greater than preset voltage value
When, by-pass unit 40 is not turned on, and the first DC power supply flows through light emitting module 20 and high impedance unit 30 at this time.Work as first voltage
When less than preset voltage value, by-pass unit 40 is connected, and the first DC power supply flows through light emitting module 20 and by-pass unit 40.
A specific embodiment according to the present invention, as shown in Fig. 2, the electricity that power supply module 10 supplies electric stabilizer
Source switchs to the first DC power supply, and power supply module 10 includes power connector end 11,11a, 11b, 11c transformer unit 12, the
One rectification circuit unit 13 and simulation filament 14,14a, the wherein number of the power connector end 11 of the present embodiment, 11a, 11b, 11c
Mesh is four, and wherein power connector end 11,11a are connected to simulation 14 both ends of filament, and power connector end 11b, 11c are connected to simulation
The both ends filament 14a, transformer unit 12 are electrically connected light emitting module 20 through the first rectification circuit unit 13.In the present embodiment,
Filament 14,14a are simulated for an impedance component, for simulating the filament characteristic of conventional fluorescent fluorescent tube.As shown in Fig. 2, in this implementation
In example, the power supply that electric stabilizer supplies is converted to an isolated power supply by transformer unit 12, increases illumination of the invention whereby
Device 1 uses upper safety, prevents user from accidentally getting an electric shock, while can allow the outer tube of lighting device 1 of the invention
Used material has more multi-selection, and in other words, lighting device 1 of the invention is not required to select safety coefficient high and expensive material
Matter can reach identical safety requirement.It is noted here that 12 liang of lateral coil ratios of the transformer unit of the present embodiment are 1:1,
But the present invention is not limited with this embodiment, and 12 liang of lateral coils of transformer unit change than view actual design demand.In the present embodiment
In, the first rectification circuit unit 13 is a bridge rectifier, and isolated power supply is switched to the first direct current by bridge rectifier
Power supply.
One of according to the present invention specific embodiment, lighting device 1 of the invention is a LED lamp tube, therefore light emitting module 20 is
It is formed by multiple light emitting diodes (LED) unit series and parallel.The light emitting module 20 and simultaneously as shown in Fig. 2, high impedance unit 30 is connected
Join by-pass unit 40, when by-pass unit 40 is not turned on, the first DC power supply flows through light emitting module 20 and high impedance unit 30, by
High impedance unit 30 absorbs the first DC power supply of too high voltages to prevent light emitting module 20 from damaging because of high pressure.In the present embodiment
In, high impedance unit 30 is formed by multiple resistor coupled in parallel, but invention is not limited thereto, and high impedance unit 30 also can be multiple
Resistance is connected in series.
As shown in Fig. 2, in the present embodiment, by-pass unit 40 is photo-coupler comprising transmitting terminal 41 and receiving end
42.When by-pass unit 40 is connected, optical signals transmitting terminal 41 reaches receiving end 42, and the first DC power supply flows through luminous mould at this time
The receiving end 42 of block 20 and by-pass unit 40.When by-pass unit 40 is not turned on, the first DC power supply flow through light emitting module 20 and
High impedance unit 30.Herein it is noted that because photo-coupler itself has the effect of electric appliance isolation, in the present embodiment optical coupling
Device is used as the by-pass unit 40 of lighting device 1, can increase the safety of lighting device 1 of the invention, while when bypass
When unit 40 is connected, the first DC power supply flows through light emitting module 20 and by-pass unit 40, and by-pass unit 40 can be illumination whereby
Device 1 provides bypass path, generates loss to avoid because the first DC power supply flows through high impedance unit 30.It is according to the present invention
Specific embodiment, by-pass unit 40 are also possible to relay (Relay) or semiconductor switch.
As shown in Fig. 2, in the present embodiment, voltage detecting circuit 50 includes the second rectification circuit unit 51, partial pressure unit
52 and switch unit 53, wherein the power supply that electric stabilizer supplies is switched to the second direct current by the second rectification circuit unit 51
Source, the second DC power supply refer to the voltage of Fig. 2 interior joint a.Partial pressure unit 52 divides to obtain the second DC power supply
First voltage, in the present embodiment, partial pressure unit 52 include that Zener diode and two resistance, first voltage refer to Fig. 2
The voltage of interior joint b.
As shown in Fig. 2, in the present embodiment, switch unit 53 is semiconductor switch, specifically TL431,
TL431 has a reference voltage, this reference voltage is preset voltage value.When first voltage is greater than preset voltage value, switch
Unit 53 is connected, and the transmitting terminal 41 of by-pass unit 40 disconnects, so that receiving end 42 disconnects (i.e. by-pass unit 40 is not turned on), at this time
First DC power supply flows through light emitting module 20 and high impedance unit 30, and the first direct current of too high voltages is absorbed by high impedance unit 30
Power supply.When first voltage is less than preset voltage value, switch unit 53 is disconnected, and the second DC power supply enters by-pass unit 40 and makes to send out
41 conducting of end is penetrated, optical signals transmitting terminal 41 is sent to receiving end 42, and (i.e. by-pass unit 40 is led for the conducting of receiving end 42 at this time
It is logical) so that the first DC power supply flows through the receiving end 42 of light emitting module 20 and by-pass unit 40.Herein it is noted that switch
The embodiment of unit 53 is not limited with previous embodiment.
Lighting device 1 of the invention detects whether first voltage is less than switch unit 53 through voltage detecting circuit 50
Preset voltage value, when first voltage is excessive, to represent the electricity of electric stabilizer supply whether determining that by-pass unit 40 is connected
The voltage in source is excessive, digests excess voltage using high impedance unit 30 to protect light emitting module 20 not by the damage of high pressure.Meanwhile
A specific embodiment according to the present invention, lighting device 1 of the invention selects photo-coupler as by-pass unit 40, because of optical coupling
Device has electric appliance isolation effect, can increase the safety of lighting device 1 of the invention, while when by-pass unit 40 is connected,
First DC power supply flows through light emitting module 20 and by-pass unit 40, and by-pass unit 40 can provide bypass road whereby for lighting device 1
Diameter generates loss to avoid because the first DC power supply flows through high impedance unit 30.
It should be noted that above-mentioned many embodiments are illustrated only for the purposes of explanation, the right that the present invention is advocated
Range is from that should subject to the claims, not just the above examples.
Claims (10)
1. a kind of lighting device characterized by comprising
One power supply module, a power supply is switched to one first DC power supply；
One light emitting module is electrically connected the power supply module；
One high impedance unit, the light emitting module of connecting；
One by-pass unit is electrically connected the light emitting module, high impedance unit by-pass unit in parallel；And
One voltage detecting circuit is electrically connected the power supply module and the by-pass unit, and the voltage detecting circuit is pre- with one
If voltage value and a first voltage, wherein the by-pass unit is not turned on when the first voltage is greater than the preset voltage value, it should
First DC power supply flows through the light emitting module and the high impedance unit；When the first voltage is less than the preset voltage value, by this
The conducting of road unit, first DC power supply flow through the light emitting module and the by-pass unit.
2. lighting device as described in claim 1, which is characterized in that the power supply module include a power connector end and
One transformer unit, wherein the power supply is converted to an isolated power supply by the transformer unit, and the power connector end is by the transformation
Device unit and the light emitting module are electrically connected.
3. lighting device as claimed in claim 2, which is characterized in that the power supply module includes one first rectification circuit list
Member, the isolated power supply is switched to first DC power supply, the transformer unit is by the first rectification circuit unit and is somebody's turn to do
Light emitting module is electrically connected.
4. lighting device as described in any one of claims 1 to 3, which is characterized in that the voltage detecting circuit includes one second
Rectification circuit unit and a partial pressure unit, wherein the power supply is switched to one second DC power supply by the second rectification circuit unit,
The partial pressure unit is to divide to obtain the first voltage second DC power supply.
5. lighting device as claimed in claim 4, which is characterized in that the partial pressure unit includes Zener diode and an electricity
Resistance.
6. lighting device as claimed in claim 4, which is characterized in that the voltage detecting circuit includes a switch unit, wherein
When the first voltage is greater than the preset voltage value, which be not turned on the by-pass unit；When the first voltage
When less than the preset voltage value, which is disconnected, and the by-pass unit is connected.
7. lighting device as claimed in claim 6, which is characterized in that the by-pass unit is a photo-coupler, the photo-coupler
Including a transmitting terminal and a receiving end, wherein the transmitting terminal is electrically connected the switch unit, should when the switching means conductive
Transmitting terminal disconnects, so that the receiving end disconnects, is not turned on the by-pass unit, and first DC power supply flows through the mould that shines at this time
Block and the high impedance unit；When the switch unit disconnects, which be connected the transmitting terminal, leads the receiving end
It is logical, the by-pass unit is connected, first DC power supply flows through the light emitting module and the receiving end at this time.
8. lighting device as claimed in claim 7, which is characterized in that the high impedance unit by multiple resistor coupled in parallel or series connection and
At.
9. lighting device as claimed in claim 7, which is characterized in that the light emitting module is in parallel by multiple light emitting diodes
Or it is connected in series.
10. lighting device as claimed in claim 2, which is characterized in that the power supply module includes a simulation filament and one
First rectification circuit unit, wherein the power connector end is connected to the simulation filament, and the transformer unit is through first rectification circuit
Unit is electrically connected the light emitting module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711476711.6A CN109996364A (en) | 2017-12-29 | 2017-12-29 | Lighting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711476711.6A CN109996364A (en) | 2017-12-29 | 2017-12-29 | Lighting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109996364A true CN109996364A (en) | 2019-07-09 |
Family
ID=67108843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711476711.6A Withdrawn CN109996364A (en) | 2017-12-29 | 2017-12-29 | Lighting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109996364A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021012156A1 (en) * | 2019-07-22 | 2021-01-28 | 深圳市豪恩智能物联股份有限公司 | Lamp tube and protection circuit and protection device applied to same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201577219U (en) * | 2009-12-19 | 2010-09-08 | 牛国伟 | Light source lighting circuit for long life LED railway annunciator |
| CN102132479A (en) * | 2008-08-29 | 2011-07-20 | 夏普株式会社 | Power supply device and lighting device |
| CN103166210A (en) * | 2011-12-19 | 2013-06-19 | 隆达电子股份有限公司 | Overvoltage protection circuit and drive circuit |
-
2017
- 2017-12-29 CN CN201711476711.6A patent/CN109996364A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102132479A (en) * | 2008-08-29 | 2011-07-20 | 夏普株式会社 | Power supply device and lighting device |
| CN201577219U (en) * | 2009-12-19 | 2010-09-08 | 牛国伟 | Light source lighting circuit for long life LED railway annunciator |
| CN103166210A (en) * | 2011-12-19 | 2013-06-19 | 隆达电子股份有限公司 | Overvoltage protection circuit and drive circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021012156A1 (en) * | 2019-07-22 | 2021-01-28 | 深圳市豪恩智能物联股份有限公司 | Lamp tube and protection circuit and protection device applied to same |
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| 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 | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190709 |