CN105392239B - Intensity adjustable LED lamp - Google Patents
Intensity adjustable LED lamp Download PDFInfo
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- CN105392239B CN105392239B CN201510990735.8A CN201510990735A CN105392239B CN 105392239 B CN105392239 B CN 105392239B CN 201510990735 A CN201510990735 A CN 201510990735A CN 105392239 B CN105392239 B CN 105392239B
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- 238000000034 method Methods 0.000 claims abstract description 21
- 238000005070 sampling Methods 0.000 claims description 24
- 238000012545 processing Methods 0.000 claims description 16
- 238000004146 energy storage Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 10
- 230000009191 jumping Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 5
- 230000004907 flux Effects 0.000 description 19
- 230000009466 transformation Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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]
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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
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a kind of lamp brightness control method, comprise the following steps：S1, start to monitor the state of power switch, and start timing；S2, recording power switch are by a kind of state until switching to the duration T of another state；S3, by the duration T of record and preset value T0The size of both numerical value is compared；S4, the following operation of execution is selected according to result of the comparison：The gradually brightness of increase light fixture, until lamp brightness is most bright；Or the brightness of light fixture is gradually reduced, until lamp brightness is most dark.Light fixture can be dimmed using original power switch using above lamp brightness control method, not only without the accessory of available circuit is changed or transformed, and special remote control, special touch electrode, special Trackpad or special knob plate are not needed.Thus installation and use are more convenient.It can pass through the LED lamp of common power switch for adjusting luminance invention additionally discloses a kind of.
Description
Technical Field
The invention relates to an illuminating lamp, in particular to a lamp brightness control method and an LED lamp with adjustable brightness.
Background
The LED is the most widely used energy-saving light source in China while being advocated by the nation at present. Due to the inherent characteristics of LEDs, it is not desirable to use a constant voltage ignition point, nor to adjust the driving voltage for dimming. The LED can adjust the light by adjusting the magnitude of the driving current, but the light color emitted by the LED is greatly changed by adjusting the driving current of the LED in a large range through the process structure characteristics of the LED.
To overcome the above problems, dimming of LEDs is generally achieved by rapidly igniting-extinguishing and controlling an igniting/extinguishing ratio (duty ratio) on the basis of constant current driving.
The existing LED dimming is various, but has the advantages and the disadvantages:
remote dimming: it is convenient, can adjust light, and can also adjust color. However, the price is expensive, and power is consumed when the lamp is in standby after being turned off, and a special remote controller is needed.
Touch dimming: it is convenient, can adjust light, even has the display screen. But the price is expensive, the power consumption is also needed after the lamp is turned off, and a special touch electrode or a special touch pad is not needed.
Knob dimming: the lamp is convenient and adjustable in light, and even the switch on the knob does not consume power after the lamp is turned off. But are also expensive and require special knob plates.
Disclosure of Invention
The invention aims to provide a method for controlling the brightness of a lamp through a common power switch, and the invention also aims to provide an LED lamp with the brightness adjustable through the common power switch.
According to an aspect of the present invention, there is provided a method for controlling brightness of a lamp, comprising the steps of:
s1, starting to monitor the state of the power switch and start timing;
s2, recording the duration T of the power switch from one state to the other state;
s3, recording the duration T and the preset value T0Comparing the values of the two;
s4, selecting to execute the following operations according to the comparison result:
gradually increasing the brightness of the lamp until the brightness of the lamp is brightest;
or,
and gradually reducing the brightness of the lamp until the brightness of the lamp is darkest.
By adopting the lamp brightness control method, the original power switch can be utilized to adjust the light of the lamp, the replacement or transformation of the accessories of the existing circuit is not needed, and a special remote controller, a special touch electrode, a special touch pad or a special knob board is not needed. Thereby the installation and the use are more convenient. And the lamp brightness control method is adopted for dimming, so that no power is consumed after the lamp is turned off.
In some embodiments, step S1 is initiated when the power switch is turned from on to off, and step S2 records the time from off to re-on of the power switch, i.e., the duration of the off state of the power switch. Therefore, the brightness control of the lamp is more convenient.
In some embodiments, step S4 includes:
s41, when T is less than or equal to T0Gradually increasing the brightness of the lamp until the brightness of the lamp is brightest;
s42, when T > T0And gradually reducing the brightness of the lamp until the brightness of the lamp is darkest.
Therefore, the brightness control of the lamp is more convenient.
In some embodiments, further comprising the steps of:
s5, in the process of adjusting the brightness of the lamp, if the power switch is detected to be switched off, storing the relevant parameters corresponding to the brightness of the lamp when the power switch is switched off, and directly importing the stored relevant parameters when the power switch is switched on next time, so that the brightness of the lamp is the brightness of the lamp when the power switch is switched off last time. Therefore, the lamp can be fixed at the corresponding brightness at any time in the process of adjusting the brightness of the lamp.
In some embodiments, step S1 further includes the following steps;
s11, when the recorded duration T is greater than the upper limit value T of the sampling timemaxWhen so, the timing is abandoned. Therefore, data redundancy caused by collecting the state duration of the power switch when the lamp is switched on or switched off for a long time can be avoided, and invalid data are prevented from being collected, so that electric energy is saved.
In some embodiments, the adjusting of the brightness of the lamp in step S4 is implemented by a step dimming circuit or a stepless dimming circuit.
In some embodiments, the light fixture is an LED light fixture.
In some embodiments, the preset value T is00.8-1.8 s, upper limit value T of sampling timemaxGreater than or equal to 30 seconds. Therefore, the method is more humanized and more suitable for the habits of most people.
In some embodiments, the initial luminous flux of the lamp is 5% to 100%, the luminous flux is 100% when the brightness of the lamp is the brightest, and the luminous flux is 5% to 20% when the brightness of the lamp is the darkest. The lamp can be used as a small night lamp when the brightness of the lamp is the darkest. Therefore, the lamp brightness control method is adopted to control the lamp, so that the requirements of various luminous fluxes on different occasions can be met, and the application is wider.
According to an aspect of the present invention, there is provided an LED lamp with adjustable brightness, comprising:
an LED light source;
the driving circuit is used for driving the LED light source to work, two ends of the driving circuit are respectively connected with the commercial power and the LED light source, and a power switch is connected in series between the commercial power and the driving circuit;
the sampling timing circuit is in signal connection with the power switch and is used for monitoring the state of the power switch and recording the duration T from one state to the other state of the power switch;
a central processing circuit, comprising:
a comparison module connected with the sampling timing circuit and used for comparing the recorded duration T with a preset value T0The magnitude of the two numerical values are compared, and a dimming command is sent out according to the comparison result,
and the dimming module is connected with the comparison module, and the output end of the dimming module is connected with the driving circuit and used for receiving the dimming instruction sent by the comparison module and adjusting the output power of the driving circuit according to the dimming instruction, so that the brightness of the LED lamp is adjusted.
And the energy storage circuit is used for providing working current for the sampling timing circuit and the central processing circuit, the input end of the energy storage circuit is connected with a mains supply, and the output end of the energy storage circuit is respectively connected with the sampling timing circuit and the central processing circuit.
By adopting the LED lamp with adjustable brightness, the original power switch can be utilized to adjust the light of the lamp, the replacement or transformation of the accessories of the existing circuit is not needed, and a special remote controller, a special touch electrode, a special touch pad or a special knob board is not needed. Thereby the installation and the use are more convenient.
Drawings
Fig. 1 is a schematic circuit diagram of an LED lamp with adjustable brightness according to an embodiment of the present invention.
Fig. 2 is a control flow chart of the LED lamp with adjustable brightness.
Fig. 3 is a graph illustrating a variation of luminous flux of the LED lamp with adjustable brightness shown in fig. 1.
The reference numerals in fig. 1 illustrate:
10. power switch 20, LED light source 30, drive circuit 50, sampling timing circuit 60, energy storage circuit 70 and central processing circuit
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. In the embodiments, the term "power switch" refers to a common power switch having only two states of "on" and "off.
Example 1
Fig. 1 to 3 schematically show an adjustable brightness LED lamp according to an embodiment of the present invention.
As shown in fig. 1, the apparatus includes an LED light source 20, a driving circuit 30, a sampling timing circuit 50, a tank circuit 60, and a central processing circuit 70.
The driving circuit 30 is used for driving the LED light source 20 to operate.
Two ends of the driving circuit 30 are connected to the commercial power and the LED light source 20, respectively.
A power switch 10 is connected in series between the commercial power and the driving circuit 30.
The sample timing circuit 50 is in signal communication with the power switch 10 for monitoring the state of the power switch 10 and recording the duration T of the power switch 10 from one state to switching to another.
The central processing circuit 70 includes a comparison module and a dimming module.
Wherein, the comparing module is connected to the sampling timing circuit 50 for comparing the recorded duration T with the preset value T0The magnitude of the two numerical values are compared, and a dimming command is sent out according to the comparison result,
the dimming module is connected to the comparison module, and an output end of the dimming module is connected to the driving circuit 30, and is configured to receive the dimming instruction sent by the comparison module, and adjust the output power of the driving circuit 30 according to the dimming instruction, so as to adjust the brightness of the LED lamp 20.
In the present embodiment, the dimming module includes a stepless dimming circuit. In further embodiments, the dimming module may further comprise a step dimming circuit.
The tank circuit 60 is used to provide operating current to the sample timing circuit 50 and the central processing circuit 70. The input end of the energy storage circuit 60 is connected with the mains supply, and the output end of the energy storage circuit 60 is respectively connected with the sampling timing circuit 50 and the central processing circuit 70.
The central processing circuit 70 is usually integrated into a single chip, and the effect of adjusting the brightness of the LED lamp is achieved by the single chip.
The working process of the single chip microcomputer is as follows:
1. and setting the duty ratio output as an initial value during power-on initialization, and selecting between 5 and 100.
2. The critical value of the operation time of the 'off-on' combined state is specified and is 0.8-1.8 seconds according to the operation process of a common switch and the operation habit of people.
3. It is determined whether the "off-on" combination state has a duration below a threshold value or the "off-on" combination state has a duration above the threshold value.
4. The control program is set as follows: in stepless dimming applications: the power-off-power-on combined state operation with the time length lower than the critical value is carried out once, the duty ratio is made to be larger and smaller until 100 (or 5), and the lamp is fixed at the current brightness when being dimmed; the "off-on" combination state operation is done once for a time above the threshold value, with the duty cycle being made smaller (or larger) and up to 5 (or 100), and fixed at the current duty cycle north while the lamp is dimming. In step dimming applications: performing power-off-power-on combined state operation with the duration less than a critical value once, and jumping the output duty ratio to be larger (or smaller) by one step until the output duty ratio is 100 (or 5 at most); an "off-on" combined state operation is made once for a time period above the critical value, with the output duty cycle jumping one step toward a smaller (or larger) up to 5 (or 100).
Duty cycle 5 is the small night light mode; the switch not only is a common function for people, but also avoids standby power consumption caused by confusion with the disconnected switch.
The duty ratio signal output by the single chip microcomputer is input into an LED constant current drive IC with duty ratio input, and then constant current output according to the required duty ratio can be obtained. For an LED constant-current drive IC without duty ratio input, an electronic switch is required to be connected in series at an LED connecting end of a drive power supply, and a duty ratio signal output by a single chip microcomputer is used for controlling the on and off of the LED constant-current drive IC. A constant current output according to the asserted duty cycle can be obtained.
By adopting the LED lamp with adjustable brightness, the original power switch can be utilized to adjust the light of the lamp, the replacement or transformation of the accessories of the existing circuit is not needed, and a special remote controller, a special touch electrode, a special touch pad or a special knob board is not needed. Thereby the installation and the use are more convenient.
The control process of the LED lamp with adjustable brightness is shown in FIG. 2, and mainly comprises the following steps:
s1, the power switch is turned off from on, the sampling timing circuit 50 starts to monitor the state of the power switch and starts to time;
s11, when the recorded duration T is greater than the upper limit value T of the sampling timemaxWhen is at TmaxWhen the power switch is not monitored to be switched from off to on within the time range, giving up timing; at TmaxWhen the power switch is monitored to be switched from off to on within the time range, the process continues to be performed at S2;
s2, recording the duration T of the power switch off state;
s3, recording the duration T and the preset value T0Comparing the values of the two;
s41, when T is less than or equal to T0Gradually increasing the brightness of the lamp until the luminous flux of the lamp reaches 100%;
s42, when T > T0And gradually reducing the brightness of the lamp until the luminous flux of the lamp reaches 10%.
And S5, in the process of adjusting the brightness of the lamp such as S41 or S42 and the like, if the power switch is detected to be switched off, storing the relevant parameters corresponding to the brightness of the lamp when the power switch is switched off, and directly introducing the stored relevant parameters when the power switch is switched on next time, so that the brightness of the lamp is the brightness of the lamp when the power switch is switched off last time.
In order to make the brightness control of the lamp more humanized and more in line with the habits of most people. In the present embodiment, the preset value T01 second, upper limit value T of sampling timemaxIt was 30 seconds. In other embodimentsIn the example, the preset value T0The sampling time can also be 1.8 seconds, and the upper limit value T of the sampling timemaxBut may also be 50 seconds.
By adopting the lamp brightness control method, the original power switch can be utilized to adjust the light of the lamp, the replacement or transformation of the accessories of the existing circuit is not needed, and a special remote controller, a special touch electrode, a special touch pad or a special knob board is not needed. Thereby the installation and the use are more convenient. And the lamp brightness control method is adopted for dimming, so that no power is consumed after the lamp is turned off.
The luminous flux of the LED lamp with adjustable brightness in different states is shown in fig. 3.
In the figure, TA2 seconds, TB2 seconds, TC2 seconds, TD0.5 second, TE2 seconds, TFThe time is 2 seconds, which is 2 seconds,
TG0.5 second, TH2 seconds, TI0.5 second, TJ0.5 second, TK0.5 second, TL0.5 second.
As shown, the luminous flux of the LED lamp is 80% in the initial state.
TA＞T0And T isAAt the stage of stable brightness of the LED lamp, therefore, TAAnd finally, gradually reducing the brightness of the LED lamp.
TB＞T0But T isBAt the stage of gradually reducing the brightness of the LED lamp, therefore, TBThe brightness of the LED lamp is stabilized to be T at the endBBrightness at the beginning.
TC＞T0And T isCAt the stage of stable brightness of the LED lamp, therefore, TCAnd at the end, the brightness of the LED lamp continues to gradually decrease.
TD＜T0But T isDAt the stage of gradually reducing the brightness of the LED lamp, therefore, TDOf end-of-line LED lampsThe brightness is stabilized as TDBrightness at the beginning.
TE＞T0And T isEAt the stage of stable brightness of the LED lamp, therefore, TEAnd after the end, the brightness of the LED lamp is continuously and gradually reduced until the luminous flux of the LED lamp is reduced to 10%, and the brightness of the LED lamp is stabilized at 10% of the luminous flux.
TF＞T0And T isFAt the stage of stable brightness of the LED lamp, but at this time, the luminous flux of the LED lamp is already 10% of the minimum value, and cannot be further reduced, therefore, TFAt the end the LED fixture stabilized at a luminance of 10% of the luminous flux.
TG＜T0And T isGAt the stage of stable brightness of the LED lamp, therefore, TGAnd finally, gradually increasing the brightness of the LED lamp.
TH＞T0But T isHAt the stage of gradually increasing the brightness of the LED lamp, therefore, THThe brightness of the LED lamp is stabilized to be T at the endHBrightness at the beginning.
TI＜T0And T isIAt the stage of stable brightness of the LED lamp, therefore, TIAnd at the end, the brightness of the LED lamp continues to gradually increase.
TJ＜T0But T isJAt the stage of gradually increasing the brightness of the LED lamp, therefore, TJThe brightness of the LED lamp is stabilized to be T at the endJBrightness at the beginning.
TK＜T0And T isKAt the stage of stable brightness of the LED lamp, therefore, TKAnd after the end, the brightness of the LED lamp continues to gradually increase until the luminous flux of the LED lamp is increased to 100%, and the brightness is stabilized at 10% of the luminous flux.
TL＜T0And T isLAt the stage of stable brightness of the LED lamp, but at this time, the luminous flux of the LED lamp is already 100% of the maximum value, and cannot be used any moreContinues to increase, therefore, TLAt the end the LED fixture stabilizes at a brightness of 100% luminous flux.
Finally, the power switch is turned off and the upper limit value T is set at the sampling timemaxAnd if the power switch is not detected to be turned on within 30 seconds, the sampling timing circuit gives up timing, and the lamp is turned off.
In other embodiments, the lamp may also adopt the following adjustment modes:
when T > T0Gradually increasing the brightness of the lamp until the luminous flux of the lamp reaches 100%;
when T is less than or equal to T0And gradually reducing the brightness of the lamp until the luminous flux of the lamp reaches 10%.
Example 2
The other LED lamp with adjustable brightness is different from the LED lamp in the embodiment 1 in that the energy storage power supply can only be used for the sampling timing circuit and the central processing circuit to continuously work for 30-50 seconds after the power switch is switched off. Therefore, when the off time of the power switch is longer than 30-50 seconds, the sampling timing circuit and the central processing circuit stop working due to the fact that no power supply exists, invalid data are prevented from being collected, and electric energy is saved.
What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (1)
1. An adjustable brightness LED lamp, comprising:
an LED light source;
the driving circuit is used for driving the LED light source to work, two ends of the driving circuit are respectively connected with a mains supply and the LED light source, and a power switch is connected between the mains supply and the driving circuit in series;
the sampling timing circuit is in signal connection with the power switch and is used for monitoring the state of the power switch and recording the duration T from one state to the other state of the power switch;
a central processing circuit, comprising:
the comparison module is connected with the sampling timing circuit and used for comparing the recorded duration time T with the preset value T0 and sending a dimming instruction according to the comparison result;
the output end of the dimming module is connected with the driving circuit and is used for receiving the dimming instruction sent by the comparison module and adjusting the output power of the driving circuit according to the dimming instruction so as to adjust the brightness of the LED lamp;
the energy storage circuit is used for providing working current for the sampling timing circuit and the central processing circuit, the input end of the energy storage circuit is connected with the mains supply, the output end of the energy storage circuit is respectively connected with the sampling timing circuit and the central processing circuit, and the energy storage circuit can only be used for continuously working for 30-50 seconds for the sampling timing circuit and the central processing circuit after a power switch is disconnected;
the central processing circuit is integrated into the single chip microcomputer, and the effect of adjusting the brightness of the LED lamp is achieved through the single chip microcomputer;
the working process of the single chip microcomputer is as follows:
1. setting duty ratio output as an initial value during power-on initialization, and selecting between 5 and 100;
2. specifying a critical value for the duration of the "off-on" combined state operation, operating as a normal switch
Setting the working process and the operation habit of people as 0.8-1.8 seconds;
3. determining whether the "off-on" combination state has a duration less than a threshold or the "off-on" combination state has a duration greater than a threshold;
4. the control program is set as follows: in stepless dimming applications: the power-off-power-on combined state operation with the time length lower than the critical value is carried out once, the duty ratio is made to be larger and smaller until 100 or 5, and the lamp is fixed at the current brightness when being dimmed; performing 'off-on' combined state operation for a time length higher than a critical value once, so that the duty ratio is smaller and larger until 5 or 100, and the lamp is fixed at the current duty ratio when dimming; in step dimming applications: performing 'power-off-power-on' combined state operation with the duration less than a critical value once, and jumping the output duty ratio to a larger or smaller level by one step until the output duty ratio reaches 100 or 5; an "off-on" combined state operation is made once for a period above the critical value, and the output duty cycle is stepped up to 5 or 100 steps smaller or larger.
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| CN201510990735.8A CN105392239B (en) | 2015-12-23 | 2015-12-23 | Intensity adjustable LED lamp |
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| CN105392239B true CN105392239B (en) | 2018-01-02 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106604454A (en) * | 2016-12-02 | 2017-04-26 | 福建星网锐捷通讯股份有限公司 | Driving circuit and driving method of using switch to set LED luminance |
| CN106714377B (en) * | 2016-12-29 | 2018-06-12 | 歌尔科技有限公司 | A kind of LED lamp driving circuit and LED lamp |
| CN109121265B (en) * | 2018-08-10 | 2020-01-14 | 江苏达伦电子股份有限公司 | Touch system applied to light source control of lamp |
| CN109068461B (en) * | 2018-08-10 | 2020-01-14 | 江苏达伦电子股份有限公司 | Touch system applied to lamp RGB control |
| CN110996467B (en) * | 2019-12-31 | 2022-01-04 | 深圳市英可瑞直流技术有限公司 | Illumination dimming control method |
| CN112954850A (en) * | 2021-02-22 | 2021-06-11 | 天津久曜灯具制造有限公司 | Classroom lamp brightness control method and device and classroom lamp |
| CN114627801B (en) * | 2022-02-17 | 2023-09-26 | Tcl华星光电技术有限公司 | Pixel circuit and display panel |
| CN115988698B (en) * | 2023-01-10 | 2023-10-03 | 明德利照明科技(惠州)有限公司 | Self-adjusting system for energy-saving environment-friendly lamp decoration |
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| CN202014402U (en) * | 2011-03-23 | 2011-10-19 | 深圳市英格瑞特电子有限公司 | Light-emitting diode light adjusting device, lamp and light adjusting system |
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| CN102438361A (en) * | 2011-10-11 | 2012-05-02 | 宁波市瑞通新材料科技有限公司 | Device capable of executing brightness regulation through press key |
| CN103152927A (en) * | 2013-02-19 | 2013-06-12 | 英飞特电子（杭州）股份有限公司 | Light-emitting diode (LED) lamp and light-dimming method thereof |
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