CN106658886B - Light source drive device and light source driving method - Google Patents
Light source drive device and light source driving method Download PDFInfo
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- CN106658886B CN106658886B CN201510737985.0A CN201510737985A CN106658886B CN 106658886 B CN106658886 B CN 106658886B CN 201510737985 A CN201510737985 A CN 201510737985A CN 106658886 B CN106658886 B CN 106658886B
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- light source
- luminescence units
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The present invention discloses a kind of light source drive device and light source driving method.In in the per unit time cycle, each luminescence unit is alternately closed, wherein remaining luminescence unit is turned on when one of luminescence unit is closed, so that the total brightness of luminescence unit maintains predetermined luminance.Using light source drive device and light source driving method of the invention, the total brightness of luminescence unit can be made to maintain predetermined luminance, so can achieve the purpose that effectively to arrive power saving in the case of not influencing luminous mass.
Description
[technical field]
The invention relates to a kind of driving devices, and in particular to a kind of light source drive device and light source driving side
Method.
[background technique]
As the demand of carbon reduction increasingly increases, light emitting diode (light emitting diode, LED) is because having
Have small in size, power saving and it is durable the features such as, and be increasingly becoming a new generation light source.The operating voltage of light emitting diode is low, energy
It actively shines and has certain brightness, brightness voltage available or current regulation, be provided simultaneously with impact resistance, anti-vibration, service life long spy
Point.Therefore light emitting diode is widely used in various terminal equipment and lighting area, such as car headlamp, traffic signals
Lamp, indicator by character, billboard and large screen video display all often may be used to fields such as regular grade architectural lighting and LCD backlights
See the application of light emitting diode.
Though light emitting diode has had the characteristics that power saving, so as the energy efficiency requirement to electronic device is higher and higher,
The power saving efficiency for further promoting light emitting device still has its necessity.
[summary of the invention]
The present invention provides a kind of light source drive device and light source driving method, can further promote the province of light source drive device
Electrical efficiency.
Light source drive device of the invention, including multiple luminescence units and driving unit.Driving unit periodically drives
Dynamic luminescence unit alternately closes each luminescence unit in the per unit time cycle, wherein when one of luminescence unit
When being closed, remaining luminescence unit is turned on, so that the total brightness of luminescence unit maintains predetermined luminance.
In one embodiment of this invention, above-mentioned driving unit includes multiple switch unit, driving chip and micro-control
Device processed.Multiple switch unit respectively corresponds the above-mentioned multiple luminescence units of coupling.Driving chip couples switch unit, output driving electricity
Pressure driving luminescence unit.The closed state of microcontroller control switch unit, alternately to close each luminescence unit.
In one embodiment of this invention, above-mentioned switch unit conducting speed having the same and identical closing speed
Degree.
In one embodiment of this invention, above-mentioned driving unit is alternately to close luminescence unit according to default sequence,
So that the total brightness of luminescence unit maintains predetermined luminance.
In one embodiment of this invention, above-mentioned luminescence unit includes the light emitting diode of multiple concatenations.
Light source driving method of the invention includes the following steps.Multiple luminescence units are provided.Periodically multiple drives are provided
Signal is moved to drive luminescence unit, wherein each driving signal alternately switchs to the second electricity by first voltage level within a period
Level is pressed, while one of driving signal switchs to second voltage level, remaining driving signal is substantially maintained at
First voltage level, and the total brightness of luminescence unit is made to maintain default luminance within the period, wherein first voltage level can make
Luminescence unit carries out luminous.
In one embodiment of this invention, above-mentioned each luminescence unit respectively corresponds setting switch unit, and passes through correspondence
Switch unit receive driving signal, light source driving method includes the closed state of control switch unit, with alternately will driving
Signal switchs to second voltage level by first voltage level.
In one embodiment of this invention, above-mentioned switch unit conducting speed having the same and identical closing speed
Degree.
In one embodiment of this invention, above-mentioned light source driving method includes that will alternately drive according to default sequence
Signal switchs to second voltage level by first voltage level, so that the total brightness of luminescence unit maintains default luminance within the period.
In one embodiment of this invention, above-mentioned luminescence unit includes the light emitting diode of multiple concatenations.
Based on above-mentioned, the embodiment of the present invention alternately closes each luminescence unit in the per unit time cycle, wherein when
When the one of luminescence unit is closed, remaining luminescence unit is turned on so that the total brightness of luminescence unit maintain preset it is bright
Degree, so can effectively arrive the purpose of power saving in the case of not influencing luminous mass.
To make the foregoing features and advantages of the present invention clearer and more comprehensible, special embodiment below, and cooperate institute's accompanying drawings
It is described in detail below.
[Detailed description of the invention]
Fig. 1 is the schematic diagram of the light source drive device of one embodiment of the invention.
Fig. 2 is the schematic diagram of the light source drive device of another embodiment of the present invention.
Fig. 3 is the waveform diagram of the driving signal of one embodiment of the invention.
Fig. 4 is the flow chart of the light source driving method of one embodiment of the invention.
[specific embodiment]
Fig. 1 is the schematic diagram of the light source drive device of one embodiment of the invention.Light source drive device 100 includes multiple hairs
Light unit 102-1~102-N and driving unit 104, wherein N is positive integer.Driving unit 104 can periodically drive luminous
Unit 102-1~102-N, in the per unit time cycle, alternately closing each luminescence unit 102-1~102-N, wherein when
When the one of luminescence unit 102-1~102-N is closed, remaining luminescence unit is turned on, so that luminescence unit 102-1~
The total brightness of 102-N maintains predetermined luminance.So by alternately closing luminescence unit, and make all have fixation in any time
The luminescence unit of quantity, which shine, can be effectively reduced the power consumption of light source drive device 100, and can not influence to shine
In the case of quality, the purpose of power saving is effectively arrived.
In other embodiments, do not limit must be by luminescence unit 102- for the closing sequence of luminescence unit 102-1~102-N
1 starts to be closed to luminescence unit 102-N in order, and driving unit 104 can also be according to default sequence set by user alternately
Driving signal is switched into second voltage level by first voltage level, and the total brightness of luminescence unit is made to maintain default within the period
Brightness.In addition, in part embodiment, not also being limited to the same time has been only capable of a luminescence unit and has been closed, can also be such as
There are 2 simultaneously or 3 luminescence units are closed, so carrying out luminous luminescence unit number in the same time must fix, to keep away
The situation that exempting from light flash etc. reduces luminous mass occurs.
Fig. 2 is the schematic diagram of the light source drive device of another embodiment of the present invention.Furthermore, it is understood that the light source such as Fig. 2 drives
Shown in dynamic device 200, driving unit 104 may include multiple switch cell S W1~SWN, driving chip 202 and microcontroller
204, wherein driving chip 202 couples switch unit SW1~SWN, and switch unit SW1~SWN couples corresponding luminescence unit
102-1~102-N, each luminescence unit can for example be implemented with multiple light emitting diodes of concatenation in this example, so not with
This is limited.Driving chip 202 can provide driving voltage to each switch unit SW1~SWN, and microcontroller 204 then can control
The closed state of switch unit SW1~SWN is provided to driving signal S1~SN's of luminescence unit 102-1~102-N with change
Voltage quasi position.
As shown in the waveform diagram of the driving signal of one embodiment of the invention of Fig. 3, only illustratively drawn in Fig. 3 embodiment
The voltage quasi position variation explanation that driving signal S1~S5 carries out driving signal is shown, the quantity of driving signal is not limited thereto.
In a cycle T, to make each driving signal S1~S5 alternately switch to low voltage level, microcontroller 204 by high voltage level
Each switch unit SW1~SW5 can be alternately closed, so that driving signal corresponding to pent switch unit switchs to low electricity
Level is pressed, and driving signal corresponding to switch unit switched on is then maintained at high voltage level, wherein luminescence unit is in connecing
The driving signal received carries out luminous when being in high voltage level.In order to avoid there is the situation flashed, all have 4 in any time
A luminescence unit carry out it is luminous, and each switch unit SW1~SW5 conducting speed having the same and identical closing speed
Degree, rapidly switches its closed state in a short time, can so be effectively reduced in the case of not influencing luminous mass
The power consumption of light source drive device 200.
Fig. 4 is the flow chart of the light source driving method of one embodiment of the invention.The light source driving side of light source drive device
Method may include the following steps.Firstly, multiple luminescence units (step S402) are provided, wherein each luminescence unit can be for example with concatenation
Multiple light emitting diodes implement, be so not limited.Then, multiple driving signals (step S404) are provided, in this implementation
Driving signal provided in example is periodic driving signal, can periodically drive corresponding luminescence unit.Come in detail
It says, in step S406 then, light source drive device includes the switch unit of multiple corresponding luminescence units, is corresponded to by control
Driving signal alternately can be switched to second voltage standard by first voltage level by the closed state of the switch unit of luminescence unit
Position, and luminescence unit is periodically driven, wherein driving signal is in second voltage standard when switch unit is in close state
Position, when switch unit is in the conductive state, driving signal is in first voltage level, and luminescence unit is in driving signal
It is driven by the drive signals and carries out luminous when first voltage level.In addition, each driving signal is alternately by first within a period
Voltage quasi position switchs to second voltage level, while the one of driving signal switchs to second voltage level, remaining driving letter
Number it is substantially maintained at first voltage level, and the total brightness of luminescence unit is made to maintain default luminance within the period.It is so logical
It crosses and alternately closes luminescence unit, and the luminescence unit for all having fixed quantity in any time is made shine and can be effectively reduced
The power consumption of light source drive device, and the purpose of power saving can be effectively arrived in the case of not influencing luminous mass.
The closing sequence of above-mentioned luminescence unit, which does not limit, to be closed by first luminescence unit in order, can also
Driving signal is alternately switched into second voltage level by first voltage level according to default sequence set by user, and makes to shine
The total brightness of unit maintains default luminance within the period.In addition, in part embodiment, not also being limited to the same time has been only capable of
One luminescence unit is closed, and for example can also have 2 simultaneously or 3 luminescence units are closed, so carry out in the same time luminous
Luminescence unit number must fix, to avoid there is unstable light emission luminance.
In addition, in order to make the total brightness of luminescence unit that can be stably maintained at predetermined luminance, each switch unit has phase
With conducting speed and identical closing velocity, be rapidly switched on or close in a short time, to avoid occur flashing
Situation.
In conclusion the embodiment of the present invention alternately closes each luminescence unit in the per unit time cycle, wherein when
When the one of luminescence unit is closed, remaining luminescence unit is turned on so that the total brightness of luminescence unit maintain preset it is bright
Degree, so can effectively arrive the purpose of power saving in the case of not influencing luminous mass.
Although the present invention has been disclosed by way of example above, it is not intended to limit the present invention., any technical field
Middle tool usually intellectual, without departing from the spirit and scope of the present invention, when can make some changes and embellishment, thus it is of the invention
Protection scope should be defined by the scope of the appended claims.
Claims (10)
1. a kind of light source drive device characterized by comprising
Multiple luminescence units；And
One driving unit periodically drives these luminescence units, when these luminescence units are in the open state, in each list
In the time cycle of position, these luminescence units are alternately closed, wherein when one of these luminescence units are closed, remaining
These luminescence units maintenance be turned on so that the total brightness of these luminescence units maintains a predetermined luminance.
2. light source drive device as described in claim 1, which is characterized in that the driving unit includes:
Multiple switch unit respectively corresponds and couples these luminescence units；
One driving chip, couples these switch units, and one driving voltage of output drives these luminescence units；And
One microcontroller controls the closed state of these switch units, alternately to close these luminescence units.
3. light source drive device as claimed in claim 2, which is characterized in that these switch units conducting speed having the same
And identical closing velocity.
4. light source drive device as described in claim 1, which is characterized in that the driving unit be according to a default sequence in turn
These luminescence units are closed on ground, so that the total brightness of these luminescence units maintains the predetermined luminance.
5. light source drive device as described in claim 1, which is characterized in that each
The luminescence unit includes the light emitting diode of multiple concatenations.
6. a kind of light source driving method characterized by comprising
Multiple luminescence units are provided；And
Offer periodically multiple driving signals are to drive these luminescence units, when these luminescence units are in the open state,
Wherein within a period, these each driving signals alternately switch to a second voltage level by a first voltage level, when these
While one of driving signal switchs to the second voltage level, remaining these driving signal be substantially maintained at this
One voltage quasi position, and the total brightness of these luminescence units is made to maintain a default luminance within the period, the wherein first voltage
It is luminous that level can be such that these luminescence units carry out.
7. light source driving method as claimed in claim 6, which is characterized in that these luminescence units respectively correspond one switch of setting
Unit, and these driving signals are received by these corresponding switch units, which includes:
Control the closed state of these switch units, with alternately by these driving signals by the first voltage level switch to this
Two voltage quasi positions.
8. light source driving method as claimed in claim 7, which is characterized in that these switch units conducting speed having the same
And identical closing velocity.
9. light source driving method as claimed in claim 6, which is characterized in that further include:
These driving signals are alternately switched into the second voltage level by the first voltage level according to a default sequence, so that
The total brightness of these luminescence units maintains the default luminance within the period.
10. light source driving method as claimed in claim 6, which is characterized in that each
The luminescence unit includes the light emitting diode of multiple concatenations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510737985.0A CN106658886B (en) | 2015-11-04 | 2015-11-04 | Light source drive device and light source driving method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510737985.0A CN106658886B (en) | 2015-11-04 | 2015-11-04 | Light source drive device and light source driving method |
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| Publication Number | Publication Date |
|---|---|
| CN106658886A CN106658886A (en) | 2017-05-10 |
| CN106658886B true CN106658886B (en) | 2019-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510737985.0A Active CN106658886B (en) | 2015-11-04 | 2015-11-04 | Light source drive device and light source driving method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101303110A (en) * | 2007-05-09 | 2008-11-12 | 刘华友 | LED ceiling lamp |
| CN202103905U (en) * | 2011-05-27 | 2012-01-04 | 广州市智枫实业有限公司 | Intelligent constant-current energy-saving LED (light-emitting diode) illumination luminaire |
| CN102446487A (en) * | 2010-10-12 | 2012-05-09 | 技领半导体(上海)有限公司 | Single inductor mutiple led string driver and method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011221262A (en) * | 2010-04-09 | 2011-11-04 | Rohm Co Ltd | Control circuit device for light-emitting element and method of controlling the same |
-
2015
- 2015-11-04 CN CN201510737985.0A patent/CN106658886B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101303110A (en) * | 2007-05-09 | 2008-11-12 | 刘华友 | LED ceiling lamp |
| CN102446487A (en) * | 2010-10-12 | 2012-05-09 | 技领半导体(上海)有限公司 | Single inductor mutiple led string driver and method thereof |
| CN202103905U (en) * | 2011-05-27 | 2012-01-04 | 广州市智枫实业有限公司 | Intelligent constant-current energy-saving LED (light-emitting diode) illumination luminaire |
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| CN106658886A (en) | 2017-05-10 |
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