CN106851916A - A kind of LED dims shunt method - Google Patents

Abstract

The invention discloses a kind of LED light modulation shunt methods, including initialization system, arrange parameter, and read sampled data；Dim signal and shunting signal are sampled respectively, and calls sampling virtual value Processing Algorithm to be processed, obtain dim signal value and shunting signal value；According to dim signal value and shunting signal value, call light modulation shunting smoothing processing algorithm to process it, obtain light modulation value and shunting value；According to light modulation value and shunting value, preserve and export light modulation output valve or shunting output valve is dimmed or shunted to LED.The present invention is separated by the way that light modulation and shunting are independent, and unaffected to colour temperature when can make light modulation, uniformity is high.And the present invention can solve the interference that manual operation and hardware error are caused by carrying out accurate calculating treatment to the data sampled, and light change can be allowed to seamlessly transit by being smoothed to light modulation streamed data, be effectively improved light visual effect.In the composite can be widely applied to LED technology field.

Description

A kind of LED dims shunt method

Technical field

The present invention relates to LED technology field, more particularly to a kind of LED light modulation shunt methods.

Background technology

With the development of lighting engineering, LED has the advantages that energy-conserving and environment-protective, light efficiency are high, long lifespan have " green energy resource " Title, it has also become the preferred light source of illuminating industry.But the requirement of the raising to LED illumination product of people's life is also increasingly Height, especially Based Intelligent Control.In order to meet diversification application and the secondary energy-saving of people, realize brightness regulation, colour temperature change and Personal settings light environment has become the demand of many occasions.

Related data research shows that dim color-temperature regulating at present does method：1. constant pressure source+binary channels DC/DC constant currents drive； 2. binary channels constant-current source；But the power-efficient of this two kinds of aspects is low, poor reliability, power is unstable, dimming effect is poor, high cost The shortcomings of.

Wherein, from constant pressure source+binary channels DC/DC constant currents driving or binary channels constant-current source, although can realize that light modulation is adjusted Colour temperature, but light modulation and color-temperature regulating are all to share a PWM control interface, and colour temperature uniformity is poor in dimming process, dims vision Effect is bad, and power is unstable, and power utilization is low need to be doubled, high cost.Especially require that occasion high is basic at some The demand of people, such as hospital, film studio, luxury clubhouse can not be met.Driven with constant pressure source+binary channels DC/DC constant currents simultaneously Way volume also than larger, it is very improper to the ultra-thin light fixture of some small sizes.

The content of the invention

In order to solve the above-mentioned technical problem, it is an object of the invention to provide a kind of energy power invariability, and can carry efficient A kind of LED dims shunt method.

The technical solution used in the present invention is：

A kind of LED dims shunt method, comprises the following steps：

Initialization system, arrange parameter, and read sampled data；

Dim signal and shunting signal are sampled respectively, and calls sampling virtual value Processing Algorithm to be processed, adjusted Optical signal value and shunting signal value；

According to dim signal value and shunting signal value, call light modulation shunting smoothing processing algorithm to process it, dimmed Value and shunting value；

According to light modulation value and shunting value, preserve and export light modulation output valve or shunting output valve is dimmed or shunted to LED.

The further improvement of shunt method is dimmed as a kind of described LED, it is described dim signal and shunting are believed respectively Number sampled, and call sampling virtual value Processing Algorithm to be processed, obtained dim signal value and shunting signal value, this step Suddenly specifically include：

According to the sampling dim signal value SD that sampling is obtained_signal, call the Processing Algorithm treatment of sampling virtual value to obtain dim signal Value D_signal；

According to the sampling shunting signal value SC that sampling is obtained_signal, call the Processing Algorithm treatment of sampling virtual value to obtain shunting signal Value C_signal。

Dim the further improvement of shunt method as a kind of described LED, it is described according to dim signal value and shunting Signal value, calls light modulation shunting smoothing processing algorithm to process it, obtains light modulation value and shunting value, the step for specifically wrap Include：

By dim signal value D_signalLight modulation PWM value PWM is converted into according to default ratio_d, and call light modulation shunting smoothing processing Algorithm is processed it, obtains light modulation value PWMD；

By shunting signal value C_signalShunting PWM value PWM is converted into according to default ratio_C, and call light modulation shunting smoothing processing Algorithm is processed it, obtains shunting value PWMC.

Dim the further improvement of shunt method as a kind of described LED, it is described according to light modulation value and shunting value, protect Deposit and export light modulation output valve or shunting output valve LED is dimmed or shunted, the step for specifically include：

Judge current light modulation output valve PWMD_outIt is whether equal with light modulation value PWMD, if so, then preserving and exporting light modulation output Value PWMD_out；Conversely, then assignment PWMD_out=PWMD, and preserve and then export light modulation output valve PWMD_out；

Judge current shunting output valve PWMC_outIt is whether equal with shunting value PWMC, if so, then preserving and output steering output Value PWMC_out；Conversely, then assignment PWMC_out=PWMC, and preserve and then output steering output valve PWMC_out。

Dim the further improvement of shunt method as a kind of described LED, described sampling virtual value Processing Algorithm, its Specifically include：

A1, the sampled signal data V for obtaining input_signal, default cumulative number condition value SC and the bar of equal cumulative number Part value CQ；

Simultaneously assignment resets for A2, initialization dynamic variable and static variable, and wherein dynamic variable is output V_out=0, static variable is Cumulative number value V_count=0, equal aggregate-value SV_count=0, starting logo position Start_mark=0, update numerical value flag bit First_mark=0, update numerical value V_first=0；

A3, the data to starting shooting and operate judge, if meeting Start_mark=0 or | V_signal-V_out| >=2, then start is marked Note position 1, i.e. Start_mark=1, it is First to update numerical value flag bit clearing_mark=0, and assignment output data V_out=V_signal, and Perform step A4；Conversely, then directly performing step A4；

A4, judge whether to meet First_mark=0, if so, then assignment V_first=V_signalWith mark First_mark=1, cumulative number Value and equal aggregate-value reset V_count=0、SV_count=0 and exit；Conversely, then by V_countFrom Jia 1, and perform step A5；

A5, judgement update numerical value V_firstWith sampled signal data V_signalIt is whether equal, if so, then equal aggregate-value SV_countFrom Plus 1 and perform step A6；Conversely, equal aggregate-value then is reset into SV_count=0, and directly exit；

A6, judge whether to meet cumulative number value V_count>=SC, if so, then updating numerical value flag bit First_mark=0, and perform Step A7；Conversely, then directly exiting；

A7, judge whether to meet equal aggregate-value SV_count>=CQ, if so, the signal data for then illustrating sampling is correct virtual value Update output V_out=V_first。

The further improvement of shunt method is dimmed as a kind of described LED, described light modulation shunts smoothing processing algorithm, It is specifically included：

B1, input delta data V_change, output data V_out, cumulative number value ADD_unit, wherein ADD_unit＞ 1；

B2, judge delta data V_changeWith output data V_outWhether V is met_change≠V_out, if so, then performing step B3；Instead It, then directly exit；

B3, judge delta data V_changeWhether output data V is more than_out, if so, then circulating to V_outWith the circulation that initial value is 0 Number of times i is carried out from Jia 1, until i=ADD_unitOr Vout=V_change；Conversely, then ring is to V_outCarry out from subtract 1 and to initial value be 0 Cycle-index i carry out from Jia 1, until i=ADD_unitOr V_out=V_change；

B4, output V_out。

The beneficial effects of the invention are as follows：

A kind of LED of present invention light modulation shunt methods are separated by the way that light modulation and shunting are independent, unaffected to colour temperature when can make light modulation, Uniformity is high.And the present invention is processed by the way that the data sampled are carried out with accurate calculating and can solve manual operation and hardware error is made Into interference, and by light modulation streamed data be smoothed can allow light change seamlessly transit, be effectively improved light vision effect Really.

Brief description of the drawings

Specific embodiment of the invention is described further below in conjunction with the accompanying drawings：

The step of Fig. 1 is a kind of LED light modulations shunt method of the invention flow chart.

Specific embodiment

With reference to Fig. 1, a kind of LED light modulations shunt method of the invention is comprised the following steps：

Initialization system, arrange parameter, and read sampled data；

Dim signal and shunting signal are sampled respectively, and calls sampling virtual value Processing Algorithm to be processed, adjusted Optical signal value and shunting signal value；

According to dim signal value and shunting signal value, call light modulation shunting smoothing processing algorithm to process it, dimmed Value and shunting value；

According to light modulation value and shunting value, preserve and export light modulation output valve or shunting output valve is dimmed or shunted to LED.

Wherein, described initialization system is specifically, such as：I/O, ADC, EEPROM register and variable are isoparametric initial Change definition and assignment.And can also repeatedly read the last time of EEPROM preservations powered-down preceding light modulation PWMD_outValue and shunting PWMC_outValue It is compared, accuracy is ensured when the inconsistent error of data re-reads, while exporting light modulation PWMD_outValue and shunting PWMC_out It is to be prepared into main program that value controls to light LED.

It is further used as preferred embodiment, it is described dim signal and shunting signal are sampled respectively, and call Sampling virtual value Processing Algorithm is processed, and obtains dim signal value and shunting signal value, the step for specifically include：

According to the sampling dim signal value SD that sampling is obtained_signal, call the Processing Algorithm treatment of sampling virtual value to obtain dim signal Value D_signal；

According to the sampling shunting signal value SC that sampling is obtained_signal, call the Processing Algorithm treatment of sampling virtual value to obtain shunting signal Value C_signal。

It is further used as preferred embodiment, it is described according to dim signal value and shunting signal value, call light modulation point Levelling slides Processing Algorithm and it is processed, and obtains light modulation value and shunting value, the step for specifically include：

By dim signal value D_signalLight modulation PWM value PWM is converted into according to default ratio_d, and call light modulation shunting smoothing processing Algorithm is processed it, obtains light modulation value PWMD；

By shunting signal value C_signalShunting PWM value PWM is converted into according to default ratio_C, and call light modulation shunting smoothing processing Algorithm is processed it, obtains shunting value PWMC.

It is further used as preferred embodiment, it is described according to light modulation value and shunting value, preserve and export light modulation output Value or shunting output valve LED is dimmed or shunted, the step for specifically include：

Judge current light modulation output valve PWMD_outIt is whether equal with light modulation value PWMD, if so, then preserving and exporting light modulation output Value PWMD_out；Conversely, then assignment PWMD_out=PWMD, and preserve and then export light modulation output valve PWMD_out；

Judge current shunting output valve PWMC_outIt is whether equal with shunting value PWMC, if so, then preserving and output steering output Value PWMC_out；Conversely, then assignment PWMC_out=PWMC, and preserve and then output steering output valve PWMC_out。

It is further used as preferred embodiment, described sampling virtual value Processing Algorithm, it is specifically included：

A1, the sampled signal data V for obtaining input_signal, default cumulative number condition value SC and the bar of equal cumulative number Part value CQ；

Simultaneously assignment resets for A2, initialization dynamic variable and static variable, and wherein dynamic variable is output V_out=0, static variable is Cumulative number value V_count=0, equal aggregate-value SV_count=0, starting logo position Start_mark=0, update numerical value flag bit First_mark=0, update numerical value V_first=0；

A3, the data to starting shooting and operate judge, if meeting Start_mark=0 or | V_signal-V_out| >=2, then start is marked Note position 1, i.e. Start_mark=1, it is First to update numerical value flag bit clearing_mark=0, and assignment output data V_out=V_signal, and Perform step A4；Conversely, then directly performing step A4；

A4, judge whether to meet First_mark=0, if so, then assignment V_first=V_signalWith mark First_mark=1, cumulative number Value and equal aggregate-value reset V_count=0、SV_count=0 and exit；Conversely, then by V_countFrom Jia 1, and perform step A5；

A5, judgement update numerical value V_firstWith sampled signal data V_signalIt is whether equal, if so, then equal aggregate-value SV_countFrom Plus 1 and perform step A6；Conversely, equal aggregate-value then is reset into SV_count=0, and directly exit；

A6, judge whether to meet cumulative number value V_count>=SC, if so, then updating numerical value flag bit First_mark=0, and perform Step A7；Conversely, then directly exiting；

A7, judge whether to meet equal aggregate-value SV_count>=CQ, if so, the signal data for then illustrating sampling is correct virtual value Update output V_out=V_first。

It is further used as preferred embodiment, described light modulation shunting smoothing processing algorithm, it is specifically included：

B1, input delta data V_change, output data V_out, cumulative number value ADD_unit, wherein ADD_unit＞ 1；

B2, judge delta data V_changeWith output data V_outWhether V is met_change≠V_out, if so, then performing step B3；Instead It, then directly exit；

B3, judge delta data V_changeWhether output data V is more than_out, if so, then circulating to V_outWith the circulation that initial value is 0 Number of times i is carried out from Jia 1, until i=ADD_unitOr Vout=V_change；Conversely, then ring is to V_outCarry out from subtract 1 and to initial value be 0 Cycle-index i carry out from Jia 1, until i=ADD_unitOr V_out=V_change；

B4, output V_out。

From the foregoing it can be that a kind of LED light modulation shunt methods of the invention are separated by the way that light modulation and shunting are independent, tune can be made Light time is unaffected to colour temperature, and uniformity is high.And the present invention is processed and can solved by carrying out accurate calculating to the data sampled The interference that manual operation and hardware error are caused, and by being smoothed to light modulation streamed data light change can be allowed smoothed Cross, be effectively improved light visual effect.

Above is preferable implementation of the invention is illustrated, but the invention is not limited to the implementation Example, those of ordinary skill in the art can also make a variety of equivalent variations or replace on the premise of without prejudice to spirit of the invention Change, these equivalent deformations or replacement are all contained in the application claim limited range.

Claims (6)

1. a kind of LED dims shunt method, it is characterised in that comprise the following steps：

Initialization system, arrange parameter, and read sampled data；

Dim signal and shunting signal are sampled respectively, and calls sampling virtual value Processing Algorithm to be processed, adjusted Optical signal value and shunting signal value；

According to dim signal value and shunting signal value, call light modulation shunting smoothing processing algorithm to process it, dimmed Value and shunting value；

According to light modulation value and shunting value, preserve and export light modulation output valve or shunting output valve is dimmed or shunted to LED.

2. a kind of LED according to claim 1 dims shunt method, it is characterised in that：It is described respectively to dim signal and Shunting signal is sampled, and calls sampling virtual value Processing Algorithm to be processed, and obtains dim signal value and shunting signal value, The step for specifically include：

According to the sampling dim signal value SD that sampling is obtained_signal, call the Processing Algorithm treatment of sampling virtual value to obtain dim signal Value D_signal；

According to the sampling shunting signal value SC that sampling is obtained_signal, call the Processing Algorithm treatment of sampling virtual value to obtain shunting signal Value C_signal。

3. a kind of LED according to claim 1 dims shunt method, it is characterised in that：It is described according to dim signal value With shunting signal value, call light modulation shunting smoothing processing algorithm to process it, obtain light modulation value and shunting value, the step for Specifically include：

By dim signal value D_signalLight modulation PWM value PWM is converted into according to default ratio_d, and call light modulation shunting smoothing processing Algorithm is processed it, obtains light modulation value PWMD；

By shunting signal value C_signalShunting PWM value PWM is converted into according to default ratio_C, and call light modulation shunting smoothing processing Algorithm is processed it, obtains shunting value PWMC.

4. a kind of LED according to claim 1 dims shunt method, it is characterised in that：It is described according to light modulation value and point Flow valuve, preserve and export light modulation output valve or shunting output valve LED is dimmed or shunted, the step for specifically include：

Judge current light modulation output valve PWMD_outIt is whether equal with light modulation value PWMD, if so, then preserving and exporting light modulation output Value PWMD_out；Conversely, then assignment PWMD_out=PWMD, and preserve and then export light modulation output valve PWMD_out；

Judge current shunting output valve PWMC_outIt is whether equal with shunting value PWMC, if so, then preserving and output steering output Value PWMC_out；Conversely, then assignment PWMC_out=PWMC, and preserve and then output steering output valve PWMC_out。

5. a kind of LED according to claim 1 and 2 dims shunt method, it is characterised in that：At described sampling virtual value Adjustment method, it is specifically included：

A1, the sampled signal data V for obtaining input_signal, default cumulative number condition value SC and the bar of equal cumulative number Part value CQ；

Simultaneously assignment resets for A2, initialization dynamic variable and static variable, and wherein dynamic variable is output V_out=0, static variable is Cumulative number value V_count=0, equal aggregate-value SV_count=0, starting logo position Start_mark=0, update numerical value flag bit First_mark=0, update numerical value V_first=0；

A3, the data to starting shooting and operate judge, if meeting Start_mark=0 or | V_signal-V_out| >=2, then start is marked Note position 1, i.e. Start_mark=1, it is First to update numerical value flag bit clearing_mark=0, and assignment output data V_out=V_signal, and Perform step A4；Conversely, then directly performing step A4；

A4, judge whether to meet First_mark=0, if so, then assignment V_first=V_signalWith mark First_mark=1, cumulative number value V is reset with equal aggregate-value_count=0、SV_count=0 and exit；Conversely, then by V_countFrom Jia 1, and perform step A5；

A5, judgement update numerical value V_firstWith sampled signal data V_signalIt is whether equal, if so, then equal aggregate-value SV_countFrom plus 1 and perform step A6；Conversely, equal aggregate-value then is reset into SV_count=0, and directly exit；

A6, judge whether to meet cumulative number value V_count>=SC, if so, then updating numerical value flag bit First_mark=0, and perform Step A7；Conversely, then directly exiting；

A7, judge whether to meet equal aggregate-value SV_count>=CQ, if so, the signal data for then illustrating sampling is correct virtual value Update output V_out=V_first。

6. a kind of LED according to claim 1 or 3 dims shunt method, it is characterised in that：Described light modulation shunting is smooth Processing Algorithm, it is specifically included：

B1, input delta data V_change, output data V_out, cumulative number value ADD_unit, wherein ADD_unit＞ 1；

B2, judge delta data V_changeWith output data V_outWhether V is met_change≠V_out, if so, then performing step B3；Instead It, then directly exit；

B3, judge delta data V_changeWhether output data V is more than_out, if so, then circulating to V_outWith the circulation that initial value is 0 Number of times i is carried out from Jia 1, until i=ADD_unitOr Vout=V_change；Conversely, then ring is to V_outCarry out from subtract 1 and to initial value be 0 Cycle-index i carry out from Jia 1, until i=ADD_unitOr V_out=V_change；

B4, output V_out。