CN105895012A - Method and device for automatically adjusting LED display brightness and electronic scale - Google Patents
Method and device for automatically adjusting LED display brightness and electronic scale Download PDFInfo
- Publication number
- CN105895012A CN105895012A CN201610491971.XA CN201610491971A CN105895012A CN 105895012 A CN105895012 A CN 105895012A CN 201610491971 A CN201610491971 A CN 201610491971A CN 105895012 A CN105895012 A CN 105895012A
- Authority
- CN
- China
- Prior art keywords
- bandwidth
- voltage
- led
- display brightness
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000001514 detection method Methods 0.000 claims abstract description 21
- 230000004907 flux Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000005611 electricity Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/18—Indicating devices, e.g. for remote indication; Recording devices; Scales, e.g. graduated
- G01G23/36—Indicating the weight by electrical means, e.g. using photoelectric cells
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
Abstract
The invention discloses a method and a device for automatically adjusting LED display brightness and an electronic scale comprising the device, wherein the method comprises the following steps: a calculation step for multiplying a low-voltage threshold of the peak voltage by a maximum value of a scanning pulse bandwidth for driving the LED as a basic value; a detection step for detecting the current peak voltage in real time; a comparison step of comparing the result of removing the base value with the detected current peak voltage with a number of bandwidths available for driving the LEDs to determine the closest bandwidth; and an adjusting step of adjusting the bandwidth for driving the LEDs to the determined closest bandwidth. According to the method and the device for automatically adjusting the LED display brightness and the electronic scale comprising the device, the LED display brightness can be relatively consistent under different voltage conditions, and the application range of system voltage is not influenced.
Description
Technical field
The present invention relates to a kind of method and apparatus being automatically adjusted LED display brightness, particularly relate to a kind of method and apparatus being automatically adjusted LED display brightness for electronic scale.
Background technology
Presently commercially available use LED, as the electronic scale of display screen, is used mostly charactron driving chip to drive LED to show.Charactron driving chip, by receiving the display control command that master chip MCU sends, controls switch and the pulse width of key scanning that LED shows.The pulse width values arranged is the biggest, and LED display brightness the highest grade.At present, electronic scale arranges the pulse width usually maximum of driving chip and immobilizes.When cell voltage supplies electricity to driving chip, supply voltage be in driving chip normally work required voltage range time, the display brightness of LED can be in the brightest state, and power consumption is relatively big, causes the waste of electricity, decreases the service life of battery simultaneously.But, when supply voltage normally works required voltage range less than driving chip, the reduction of the voltage that the display brightness of LED can be got along with driving chip and the most dimmed, the situation that different voltage display brightness is inconsistent occurs.
In order to solve the problems referred to above, a kind of method is will to be set to low pressure threshold V1 less than the electronic scale driving chip required minimum voltage value that normally works, and when cell voltage is less than threshold value V1 set, electronic scale will be prompted to low pressure warning and then shuts down, and quits work.Although this method can ensure that the relative uniformity of LED display brightness, but the range of its cell voltage is voltage full scale deducts V1, reduces the range of cell voltage.
Still an alternative is that, cell voltage is supplied electricity to after voltage-releasing voltage stabilizer voltage stabilizing the driving chip of electronic scale again, but needs to arrange low-voltage warning threshold (its output voltage being slightly larger than or specifying equal to voltage-stablizer).It is supplied to the voltage of voltage-stablizer input and the size of low voltage threshold by comparing current battery level in real time, to prevent voltage-stablizer input terminal voltage from causing voltage-stablizer not play pressure stabilization function less than voltage-stablizer rated output voltage, voltage-stablizer actual output voltage is reduced along with the reduction of voltage-stablizer input terminal voltage, and the situation causing LED display brightness the most dimmed occurs.So, the range of cell voltage is that voltage full scale deducts low-voltage warning threshold, when select voltage-stablizer rated output voltage value the highest time, low-voltage warning threshold is the highest, LED display brightness can the brightest and system voltage range the least.When the voltage-stablizer rated output voltage value selected is too low, LED display brightness can be partially dark, can affect the display effect of registration, affect the recognition of user.It addition, voltage-stablizer itself also can consume electric energy, reduce the service life of battery.
It is, thus, sought for one can make electronic scale LED screen display brightness moderate, under different voltage condition, display brightness is relatively uniform and does not affect the method and apparatus being automatically adjusted LED display brightness of range of system voltage.
Summary of the invention
The invention aims to the defect overcoming prior art to exist, it is provided that a kind of method and apparatus that can be automatically adjusted LED display brightness and comprise this device electronic scale.In order to realize this purpose, the technical solution used in the present invention is as follows.
First aspect according to the embodiment of the present invention, it is provided that a kind of method being automatically adjusted LED display brightness, including calculation procedure, for the low pressure threshold of crest voltage is multiplied with the scanning impulse maximum value bandwidth driving LED, based on value；Detecting step, for detection present peak value voltage in real time；Comparison step, removes described the basic value numerical value obtained and the some bandwidth that can be used for driving LED with the present peak value voltage detected and compares respectively, to determine immediate bandwidth；And set-up procedure, for by drive LED Bandwidth adjustment be determined by immediate bandwidth.
According to the second aspect of the embodiment of the present invention, be also to provide a kind of method being automatically adjusted LED display brightness, including calculation procedure, for the low pressure threshold of crest voltage is multiplied with the scanning impulse maximum value bandwidth driving LED, based on value；Detecting step, for detection present peak value voltage in real time；Comparison step, by the present peak value voltage detected and can be used for driving some bandwidth of LED to remove some numerical value that described basic value obtains respectively and compare respectively, to determine the numerical value closest to the present peak value voltage detected；And set-up procedure, for by drive the Bandwidth adjustment of LED by determined by closest to the bandwidth corresponding to the numerical value of present peak value voltage detected.
According to further embodiment, optionally, the described method being automatically adjusted LED display brightness also includes timed step, is used for making described detecting step be spaced to schedule and detects.
According to another embodiment, optionally, the described method being automatically adjusted LED display brightness also includes judging step, for judge the present peak value voltage that detects in real time whether less than the low pressure threshold of crest voltage, if it is, end process shutting down；If present peak value voltage is not less than the low pressure threshold of crest voltage, then process continues.
According to another embodiment, it is preferred that in the comparison step, the absolute value of the difference of the numerical value compared is minimum closest.
The third aspect according to the embodiment of the present invention, it is provided that a kind of device being automatically adjusted LED display brightness, including computing module, for the low pressure threshold of crest voltage is multiplied with the scanning impulse maximum value bandwidth driving LED, based on value；Detection module, for detection present peak value voltage in real time；Comparison module, removes described the basic value result obtained and the some bandwidth that can be used for driving LED with the present peak value voltage detected and compares respectively, to determine immediate bandwidth；And adjusting module, for by drive LED Bandwidth adjustment be determined by immediate bandwidth.
According to another embodiment, optionally, described comparison module may be additionally configured to the present peak value voltage detected and can be used for driving some bandwidth of LED to remove some numerical value that described basic value obtains respectively and compare respectively, to determine the numerical value closest to the present peak value voltage detected；Meanwhile, adjusting module be configured to by drive the Bandwidth adjustment of LED by determined by closest to the bandwidth corresponding to the numerical value of present peak value voltage detected.
According to further embodiment, optionally, the described device being automatically adjusted LED display brightness also includes time block, is used for making described detection module be spaced to schedule and detects.
According to another embodiment, optionally, the described device being automatically adjusted LED display brightness also includes judge module, for judge the present peak value voltage that detects in real time whether less than the low pressure threshold of crest voltage, if it is, end process shutting down.
Fourth aspect according to the embodiment of the present invention, it is provided that a kind of electronic scale, including according to the device being automatically adjusted LED display brightness described in the third aspect of the embodiment of the present invention
According to the method and apparatus being automatically adjusted LED display brightness of the embodiment of the present invention and comprise the electronic scale of this device, light-emitting diode display display brightness can be made moderate, under different voltage condition, display brightness is relatively uniform, and does not affect the range of system voltage.
Being specifically described the present invention below in conjunction with accompanying drawing and by embodiment, the most identical or essentially identical parts use identical reference instruction.
Accompanying drawing explanation
Fig. 1 shows the schematic diagram that LED output light flux changes linearly over time；
Fig. 2 is the schematic diagram that the LED output light flux that human eye is experienced changes linearly over time；
Fig. 3 is the indicative flowchart of the method being automatically adjusted LED display brightness according to one embodiment of the invention；
Fig. 4 is that the method being automatically adjusted LED display brightness according to one embodiment of the invention is to determine the schematic diagram of bandwidth；
Fig. 5 is the schematic block diagram of the device being automatically adjusted LED display brightness according to one embodiment of the invention；
Fig. 6 is the schematic block diagram of the device being automatically adjusted LED display brightness realized according to the combination processor of one embodiment of the invention.
Detailed description of the invention
Under same case, LED actual power is the biggest, and the display brightness of LED is the brightest.In the case of voltage is identical, selecting the pulse width of different driving LED, the display brightness of LED is different；Wherein " width " in pulse width, refers to the ON time of the time of pulse high level, i.e. LED；The length of the ON time of LED can affect the average current of LED；In the case of other conditions are identical, selecting different pulse widths, the frequency of pulse is constant；Therefore, the pulse width of selection is the biggest, and the high level time of pulse is the longest, and then the ON time of LED is the longest, and the average current of LED is the biggest, and the actual power of LED is the biggest, and the brightness of LED is the brightest.In the case of voltage difference, selecting identical pulse width, the display brightness of LED is different；When selecting identical pulse width, the average current of LED is the same；When voltage is the biggest, the actual power of LED is the biggest, and the display brightness of LED is the brightest.
Dutycycle refers to the ratio of pulse high level time and pulse period.It is constant current that LED drives, and the only amendment continuous current that pulse width is regulated and the time ratio of cutout, so the output of dutycycle and luminous flux is linear relationship.LED output light flux changes linearly over time, as shown in Figure 1.But, human eye impression is not linear, as in figure 2 it is shown, in light glimmer district, the least luminous flux changes also allows human eye feel that light flux variations is the biggest；And in brighter region, the biggest luminous flux jumps, the light flux variations that human eye is felt is little.
Therefore, according to described above, under different cell voltage states, by selecting suitable pulse width, LED display brightness can be made to be in the bigger suitable region of light flux ratio and keep brightness relatively uniform.
As it is shown on figure 3, be the indicative flowchart of the method being automatically adjusted LED display brightness according to one embodiment of the invention, specifically include that calculation procedure 100, detecting step 104, comparison step 108, and set-up procedure 110；Additionally, in another embodiment, timed step 102 is included the most alternatively；In yet another embodiment, include the most alternatively judging step 106.
Wherein calculation procedure 100 is for being multiplied the low pressure threshold of crest voltage with the scanning impulse maximum value bandwidth driving LED, based on value.Timed step 102 is used for making described detecting step be spaced to schedule and detects.Detecting step 104 is for detection present peak value voltage in real time.Judge step 106 for judge the present peak value voltage that detects in real time whether less than the low pressure threshold of crest voltage, if it is, end process shutting down.
In comparison step 108, according to an embodiment, remove described the basic value numerical value obtained and the some bandwidth that can be used for driving LED with the present peak value voltage detected and compare respectively, to determine immediate bandwidth；In another embodiment, in comparison step 108, first remove described basic value respectively by the some bandwidth that can be used for driving LED, obtain corresponding some numerical value, the present peak value voltage detected is compared respectively with obtained some numerical value, to determine the numerical value closest to the present peak value voltage detected.The most in the comparison step, it is preferred that according to an embodiment, if the absolute value of the difference of the numerical value compared is minimum, be then closest.
In set-up procedure 110, according to an embodiment, immediate bandwidth determined by by the Bandwidth adjustment driving LED be；Or, according to another embodiment, set-up procedure 110 for by drive the Bandwidth adjustment of LED by determined by closest to the bandwidth corresponding to the numerical value of the present peak value voltage detected.
In an example selecting charactron driving chip TM1620, the pulse width values that can arrange has 1/16,2/16,4/16,10/16,11/16,12/16,13/16,14/16 totally eight kinds；Can be according to the method for above-described embodiment, according to the state to the current battery level of system power supply, controlling charactron driving chip by MCU selects corresponding pulse width to regulate LED display brightness, thus it is relatively uniform to realize LED display brightness under different voltage condition.As shown in Figure 4, abscissa represents the cell voltage (i.e. crest voltage) that system is current, ordinate is output voltage average (i.e. crest voltage and the product of pulse width), the slope of oblique line represents different pulse width values, the most for the sake of clarity merely illustrate partial pulse width (i.e. 10/16,11/16,12/16,13/16,14/16) figure in the coordinate system, and illustrate as example.Wherein low pressure threshold is not driven the minimum voltage value impact that chip normally works required, and when its size may be configured as being multiplied by maximum pulse, LED display brightness is the darkest receptible degree, can be determined by experiment according to different driving chip.In this example, system voltage full scale for example, 6V, it is more suitable that system low-voltage threshold value is set to 3.6V；When crest voltage reaches system low-voltage threshold value, select maximum pulse width values that is 14/16.Therefore, by being worth based on the output voltage average of system low-voltage threshold value (i.e. crest voltage minimum of a value), the basic value=3.6V 14/16=3.15 V(step 100 of current system can be calculated), it is the straight line being parallel to axis of abscissas in the diagram.
During detection present peak value voltage, can carry out at random, but it is preferred that in one embodiment, be spaced to schedule (such as about 1 to 10 second, etc.) timing detection present peak value voltage (step 102).Assume that the present peak value voltage obtained in certain detects is 3.4V(step 104), owing to can determine that this present peak value voltage, less than low pressure threshold 3.6V, then terminates process shut down (step 106)；Assume that the present peak value voltage obtained in certain detects is 4.18V, can determine that this present peak value voltage continues not less than low pressure threshold 3.6V, process；Then, basic value is removed equal to 0.7535(that is 12.06/16) with this present peak value voltage 4.18V, by this numerical value and available eight kinds of pulse width numerical value (1/16,2/16,4/16,10/16,11/16,12/16,13/16,14/16), obviously be minimum with 12/16 closest to (step 108), the i.e. absolute value 0.00375 of both differences；Then, under the control of MCU, by charactron driving chip, the pulse width driving LED is adjusted to 12/16(step 110).
In yet another embodiment, it is also possible to remove basic value by available some bandwidth and obtain some relevant voltage values, as shown in Figure 4, bandwidth W4The voltage U of=14/16 correspondence4=3.6V, bandwidth W3The voltage U of=13/16 correspondence3=3.88V, bandwidth W2The voltage U of=12/16 correspondence2=4.2V, bandwidth W1The voltage U of=11/16 correspondence1=4.58V ...；Assume that in certain detects the present peak value voltage that obtains is as the same for 4.18V, by this value and magnitude of voltage (U4, U3, U2, U1...) compare respectively, it is clear that immediate is U2(step 108), the i.e. absolute value 0.02 of both differences are minimum；Then, under the control of MCU, by charactron driving chip, the pulse width driving LED is adjusted to U2Corresponding bandwidth 12/16(step 110).In other embodiments, can also be prestored in chip voltage-pulses width value information table, by the way of tabling look-up, detects current crest voltage in real time, then compare current crest voltage closest with which numerical value in table, then use closest to the pulse width values corresponding to numerical value.
As it is shown in figure 5, be the schematic block diagram of the device 500 being automatically adjusted LED display brightness according to one embodiment of the invention, specifically include that computing module 200, detection module 204, comparison module 208, and adjusting module 210；Additionally, in another embodiment, time block 202 is included the most alternatively；In yet another embodiment, judge module 206 is included the most alternatively.These modules can be realized by software, hardware, firmware or a combination thereof.Wherein:
-computing module 200 is used for performing step 100, by the low pressure threshold of crest voltage with drive LED scanning impulse maximum value bandwidth be multiplied, based on be worth；
-time block 202 is used for performing step 102, makes detecting step be spaced to schedule and detects；Time block can be selected for various timer, or selects the clock circuit being made up of crystal oscillator, timing to send signal to detection module；
-detection module 204 is used for performing step 104, detects current crest voltage in real time；Detection module can be selected for induction amplifier and the amplifying circuit of resistance composition, it is connected between time block and comparison module, by receiving the timing signal that time block provides, timing detects current crest voltage, and the crest voltage detected is exported comparison module；
-judge module 206 is used for performing step 106, it is judged that in real time whether the present peak value voltage of detection is less than the low pressure threshold of crest voltage, if it is, end process shutting down；
-comparison module 208 is used for performing step 108, removes described the basic value numerical value obtained and the some bandwidth that can be used for driving LED with the current crest voltage detected and compares respectively, to determine immediate bandwidth；Or, by the present peak value voltage detected and can be used for driving some bandwidth of LED to remove some numerical value that described basic value obtains respectively and compare respectively, to determine the numerical value closest to the present peak value voltage detected；Comparison module is connected between detection module and adjusting module, can be selected for voltage comparator, by the present peak value voltage detected and can be used for driving some bandwidth of LED to remove some magnitudes of voltage that described basic value obtains respectively and compare respectively；Also can be selected for digital comparator, remove described the basic value numerical value obtained and the some bandwidth that can be used for driving LED with the current crest voltage detected and compare respectively；And
-adjusting module 210 is used for performing step 110, by drive LED Bandwidth adjustment be determined by immediate bandwidth.
Can be implemented in various electronic scale according to the device being automatically adjusted LED display brightness of above-described embodiment, and can realize in conjunction with the processor of electronic scale, charactron driving chip, LED display module etc..As shown in Figure 6, it it is the schematic block diagram of the device being automatically adjusted LED display brightness realized according to the combination processor of an embodiment, wherein processor 200 ' can be configured to play all or part of effect of computing module, judge module, comparison module and adjusting module, time block 202 is connected with processor 200 ' and fetches offer timing signal, and detection module 204 is spaced to schedule under the control of processor 200 ' and detects crest voltage in real time；Under the control of processor 200 ', by charactron drive module 212 Bandwidth adjustment driving LED display module 214 is arrived determined by suitable numerical value.Wherein processor 200 ' includes but not limited to CPU, DSP, PLC, MCU or single-chip microcomputer etc..
Describe the present invention above by specific embodiment, but the present invention is not limited to these specific embodiments.Those skilled in the art should be understood that, the present invention can also be made various amendment, equivalent, change etc., such as it is divided into two or more steps or module to realize a step in above-described embodiment or module, or contrary, the function of two or more steps in above-described embodiment or module is placed in a step or module and realizes.But, these conversion, all should be within protection scope of the present invention without departing from the spirit of the present invention.It addition, some terms that present specification and claims is used, it is not to limit, it is only for be easy to describe.Additionally, " embodiment ", " another embodiment " described in above many places etc. represents different embodiments, naturally it is also possible to it is completely or partially combined in one embodiment.
Claims (10)
1. the method being automatically adjusted LED display brightness, it is characterised in that including:
Calculation procedure, for the low pressure threshold of crest voltage is multiplied with the scanning impulse maximum value bandwidth driving LED, based on value；
Detecting step, for detection present peak value voltage in real time；
Comparison step, removes described the basic value numerical value obtained and the some bandwidth that can be used for driving LED with the present peak value voltage detected and compares respectively, to determine immediate bandwidth；And
Set-up procedure, for by drive LED Bandwidth adjustment be determined by immediate bandwidth.
2. the method being automatically adjusted LED display brightness, it is characterised in that including:
Calculation procedure, for the low pressure threshold of crest voltage is multiplied with the scanning impulse maximum value bandwidth driving LED, based on value；
Detecting step, for detection present peak value voltage in real time；
Comparison step, by the present peak value voltage detected and can be used for driving some bandwidth of LED to remove some numerical value that described basic value obtains respectively and compare respectively, to determine the numerical value closest to the present peak value voltage detected；And
Set-up procedure, for by drive the Bandwidth adjustment of LED by determined by closest to the bandwidth corresponding to the numerical value of present peak value voltage detected.
The method being automatically adjusted LED display brightness the most as claimed in claim 1 or 2, it is characterised in that also include:
Timed step, is used for making described detecting step be spaced to schedule and detects.
The method being automatically adjusted LED display brightness the most as claimed in claim 1 or 2, it is characterised in that also include:
Judge step, for judge the present peak value voltage that detects in real time whether less than the low pressure threshold of crest voltage, if it is, end process shutting down.
It is automatically adjusted LED display brightness method the most as claimed in claim 1 or 2, it is characterised in that: in the comparison step, the absolute value of the difference of the numerical value compared is minimum closest.
6. the device being automatically adjusted LED display brightness, it is characterised in that including:
Computing module, for the low pressure threshold of crest voltage is multiplied with the scanning impulse maximum value bandwidth driving LED, based on value；
Detection module, for detection present peak value voltage in real time；
Comparison module, removes described the basic value numerical value obtained and the some bandwidth that can be used for driving LED with the present peak value voltage detected and compares respectively, to determine immediate bandwidth；And
Adjusting module, for by drive LED Bandwidth adjustment be determined by immediate bandwidth.
It is automatically adjusted the device of LED display brightness the most as claimed in claim 6, it is characterized in that: described comparison module may be additionally configured to the present peak value voltage detected and can be used for driving some bandwidth of LED to remove some numerical value that described basic value obtains respectively and compare, to determine the numerical value closest to the present peak value voltage detected；Meanwhile, adjusting module be configured to by drive the Bandwidth adjustment of LED by determined by closest to the bandwidth corresponding to the numerical value of present peak value voltage detected.
The device being automatically adjusted LED display brightness the most as claimed in claims 6 or 7, it is characterised in that also include:
Time block, is used for making described detection module be spaced to schedule and detects.
The device being automatically adjusted LED display brightness the most as claimed in claims 6 or 7, it is characterised in that also include:
Judge module, for judge the present peak value voltage that detects in real time whether less than the low pressure threshold of crest voltage, if it is, end process shutting down.
10. an electronic scale, it is characterised in that: include the device being automatically adjusted LED display brightness as according to any one of claim 6 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610491971.XA CN105895012A (en) | 2016-06-29 | 2016-06-29 | Method and device for automatically adjusting LED display brightness and electronic scale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610491971.XA CN105895012A (en) | 2016-06-29 | 2016-06-29 | Method and device for automatically adjusting LED display brightness and electronic scale |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105895012A true CN105895012A (en) | 2016-08-24 |
Family
ID=56718675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610491971.XA Pending CN105895012A (en) | 2016-06-29 | 2016-06-29 | Method and device for automatically adjusting LED display brightness and electronic scale |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105895012A (en) |
-
2016
- 2016-06-29 CN CN201610491971.XA patent/CN105895012A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9456475B2 (en) | LED light source with reduced flicker | |
| CN101742771B (en) | Portable type lamp, light dimming circuit and light dimming method | |
| CN102143638B (en) | Silicon-controlled light-dimming circuit, light-dimming method and LED (light-emitting diode) driver applying the same | |
| CN103247279B (en) | Light source driving circuit of light emitting diode and backlight module | |
| CN106101591B (en) | The method of adjustment of LCD TV and its backlight driving voltage, device | |
| CN104735843A (en) | Light-emitting diode controller capable of automatically switching light dimming modes | |
| CN103139978A (en) | Light emitting diode driving device and method thereof | |
| CN102984860B (en) | Light emitting diode (LED) dimming drive module, backlight module and liquid crystal display device | |
| CN105430198A (en) | Device and method used for adjusting handset illumination brightness | |
| KR20080000947A (en) | Display apparatus and control method thereof | |
| US20100033102A1 (en) | Light Adjusting Device for a Light Emitting Diode and Related Light Adjusting Method and Light Emitting Device | |
| WO2018121707A1 (en) | Device for controlling brightness of mobile phone screen | |
| CN105895012A (en) | Method and device for automatically adjusting LED display brightness and electronic scale | |
| US8773046B2 (en) | Driving circuit having voltage dividing circuits and coupling circuit for controlling duty cycle of transistor and related circuit driving method thereof | |
| US20140132160A1 (en) | Method for Reducing Standby Power Consumption | |
| CN104302036A (en) | Light emitting control circuit | |
| CN109949775A (en) | A kind of power supply unit of liquid crystal display | |
| CN103137079A (en) | Constant current driving device of light-emitting diode (LED) backlight module | |
| CN104113968A (en) | Method, device and circuit for realizing lamp brightness adjustment by utilizing single-line switch | |
| PL2130413T3 (en) | Method of ignition regulation of discharge lamp and the corresponding electronic ballast circuit | |
| TWI634812B (en) | Digital universal dimmer | |
| CN104065811B (en) | A kind of method based on mobile phone released state regulation PWM duty cycle | |
| CN109587889B (en) | LED lamp tube control method, system and device | |
| CN106954308A (en) | A kind of regulation system of LED dimming power sources minimum output current | |
| CN106604491B (en) | LED dimming MOS tube output control circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20161216 Address after: 528400 Guangdong city of Zhongshan Province Town Village Title Jin An Lu No. 23 A District Applicant after: Zhongshan happy Electronics Co., Ltd. Address before: 528400 A District, Guangdong City, Zhongshan Torch Development Zone East Road, No. 105 Applicant before: Guangdong Transtek Medical Electronics Co., Ltd. |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160824 |