CN103347335A - Backlight control method of instrument - Google Patents
Backlight control method of instrument Download PDFInfo
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- CN103347335A CN103347335A CN2013102660139A CN201310266013A CN103347335A CN 103347335 A CN103347335 A CN 103347335A CN 2013102660139 A CN2013102660139 A CN 2013102660139A CN 201310266013 A CN201310266013 A CN 201310266013A CN 103347335 A CN103347335 A CN 103347335A
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- led lamp
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- led
- goes out
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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 invention discloses a backlight control method of an instrument. The method includes a first step of conducting a power-on self-test and storing health state data, produced through the self-test result, of each LED lamp, a second step of selecting the LED lamps for use according to the self-test result in the first step, and a third step of conducting working process monitoring, conducting real-time monitoring on the LED lamps in a working state, and storing the monitoring data. The invention provides the control method with the long service life for instrument backlight design, the service life of an LED is made to meet the requirement for product service life, the reliability of backlight is also guaranteed, and the poor performance that the LED lamps flicker in a backlight situation can be effectively avoided.
Description
Technical field
The present invention relates to a kind of method for controlling backlight thereof of instrument.
Background technology
The working life of automobile, engineering machinery instrument is general require longer, timing series products particularly, for example hour meter that uses of engineering machinery belongs to a kind of of instrument, is used for the operating time of record engineering machinery, generally requiring the dominant record time is 99999.9 hours.Generally use LED as back light in the current instrument design, namely the PCB at the back side such as LCD, dial plate goes up the relevant position and arranges LED, and the light that sends by LED illuminates the scale on LCD or the dial plate, thereby can provide reading clearly under the darker situation of light.
Use LED as the backlight of instrument, what the life-span of LED was subjected to its condition of work and operational environment influences meeting difference to some extent, but the current single led life-span can't reach 100000 hours, can't satisfy working life and require long meters product requirement, as not satisfying hour timing length of meter, and a hour meter also has in running order but untimed situation, and requiring actual life can be longer than timing length.Automobile, the backlight of engineering machinery meters product can not at will be changed, engineering machinery instrument particularly, because operational environment is comparatively abominable, environment for use is also relatively poor, therefore its instrument design sealing of generally having relatively high expectations, take apart again behind the product export and will inevitably calculate bad its sealing, after LED backlight breaks down, just can not solve by the mode of taking replacement of products LED apart so.Common solution is to use many group LED as backlight, the same time only allow one group in running order, switch by circulation each group worked successively, each organizes the life-span backlight that total life-span sum backlight is instrument product.If but wherein a certain group or several groups of LED break down, will cause in the in running order time period of this group LED backlight unusual, the normal partial fault of part among several groups of LED, will cause hour meter backlight normally unusual sometimes sometimes, the switching mode that simply circulates can not guarantee backlight reliable of instrument.
Summary of the invention
In order to solve problems such as above-mentioned LED-backlit source service life weak point, stable deficiency, the design that the invention provides a kind of software design and produce.
A kind of method for controlling backlight thereof of instrument comprises: (1) startup self-detection step, and the state of health data of each LED lamp that self-detection result is produced is stored; (2) the LED lamp that uses according to the self-detection result selection of step (1); (3) course of work monitoring is monitored in real time to the LED lamp in the work, and Monitoring Data is stored.
Concrete, described healthy shape data comprise grows bright/long Reflector that goes out, recover detection counter and work duration, wherein grow bright/long Reflector that goes out and equal 0 expression normal condition, equal 1 long bright malfunction of expression, equal 2 long malfunctions of going out of expression, recovery detection counter and work duration initial value are 0.
More specifically, startup self-detection step comprises:
(11) judge the LED lamp whether long bright malfunction is arranged in the LED lamp according to the state of health data of storage, then do not enter step (13) if having, then enter step (12) if having.
(12) whether the health status of LED lamp that detects the bright malfunction of this length still for long bright fault, if then withdraw from self check, and keep its long bright/the long Reflector that goes out is 1, just enters step (13) if not.
(13) judge whether the LED lamp of the long malfunction of going out according to the data record of storage, then enter step (14) if having, retreat out self check if nothing is then carried out the health status inspection to all LED lamps.
(14) health status that detects the long trouble light that goes out fault whether still, if then do not change its long bright/the long Reflector that goes out, then the recovery detection counter of this lamp is added 1 if not, and withdraws from self check.
Preferably, when the numerical value of the recovery detection counter of certain LED lamp storage greater than default value, then with the length of this LED lamp bright/the long Reflector that goes out puts 0 and will recover detection counter and put 0, described default value is greater than 1.
More specifically, select the method for the LED lamp of use to be: still be long bright fault if detect the LED lamp of the bright malfunction of length that has recorded in the self check step, then selecting it is to use lamp; Then do not select non-length to go out to work in the LED lamp of malfunction the shortest LED lamp of duration as using lamp if there is the LED lamp of long bright malfunction.
More specifically, method to the inspection of LED lamp health status comprises: long bright fault detect: control LED lamp extinguishes, detect the voltage between LED lamp and the matching resistor, judge according to magnitude of voltage whether the LED lamp is in and extinguish state, if be not in and extinguish state and judge that then it is the LED lamp of long bright fault, with its long bright/the long Reflector that goes out puts 1; The long fault detect of going out: control LED lamp is lighted, and judges according to magnitude of voltage whether the LED lamp is in illuminating state, does not judge that then it is the LED lamp of the long fault of going out if be not in illuminating state, with its long bright/the length Reflector that goes out puts 2.
More specifically, the method that the LED lamp in the work is monitored in real time is:
(31) calculate in real time the duration that the LED lamp is in illuminating state, long data carries out real-time update during to the work of this LED lamp correspondence.
(32) monitor the voltage of each LED lamp in real time, judge its operating state.
(33) if detecting the LED lamp that is in by illuminating state extinguishes, then enter and lighted LED lamp abnormality processing step.
(34) if detect and be in the LED lamp that is extinguished state and light, then enter and extinguished LED lamp abnormality processing step.
Further, comprised by being lighted LED lamp abnormality processing step: to this LED lamp extinguish operation and with its long bright/the long Reflector that goes out puts 2, selects the shortest one of work duration to light operation from all the other normal LED lamps.
Further, comprised by being extinguished LED lamp abnormality processing step: select to use this LED, and with the length of this LED lamp bright/the long Reflector that goes out puts 1, and to normally being extinguished operation by the LED of illuminating state before.
In sum, a kind of long-life control method that the present invention has been the instrument backlight design not only makes the LED life-span satisfy the requirement of life of product, has also guaranteed reliability backlight, the bad performance of going out when bright in the time of can avoiding backlight effectively.
Embodiment
In order to allow those skilled in the art can understand technical scheme of the present invention better, below the invention will be further elaborated.
The present invention has disclosed a kind of method for controlling backlight thereof of instrument, may further comprise the steps.
(1) startup self-detection, read the state of health data of having stored, healthy shape data comprise grows bright/long Reflector that goes out, recover detection counter and work duration, wherein grow bright/long Reflector that goes out and equal 0 expression normal condition, equal 1 long bright malfunction of expression, equal 2 long malfunctions of going out of expression, recovery detection counter and work duration initial value are 0.
Judge the LED lamp (long bright trouble light) whether long bright malfunction is arranged in the LED lamp according to the state of health data of storage, then do not enter (13) if having, then enter step (12) if having.
(12) whether the health status of LED lamp that detects the bright malfunction of this length still for long bright fault, if then withdraw from self check, and keep its long bright/the long Reflector that goes out is 1, just enters step (13) if not.
(13) judge whether the LED lamp (the long trouble light that goes out) of the long malfunction of going out according to the data record of storage, then enter step (14) if having, then all LED lamps are not carried out the health status inspection and retreat out self check if having.
(14) health status that detects the long trouble light that goes out fault whether still, if then do not change its long bright/the long Reflector that goes out, then the recovery detection counter of this lamp is added 1 if not, and withdraws from self check.
Method to the inspection of LED lamp health status comprises: long bright fault detect and the long fault detect of going out.In general, the LED lamp is in to be lighted and extinguishes state, and the magnitude of voltage between LED lamp and matching resistor has larger difference, can judge LED accordingly and be in and light or extinguish state.Because to LED brightness requirement difference, its matching resistor value has difference, therefore judge that LED is in the standard of lighting or extinguishing the voltage of state and need determines theoretical value under the bright or state that goes out that the magnitude of voltage criterion between LED and matching resistor calculates according to specific design, and determine in conjunction with actual measurement and error range.
Can extinguish by control LED lamp for long bright fault detect, detect the voltage between LED lamp and matching resistor, judge according to magnitude of voltage whether the LED lamp is in and extinguish state, do not extinguish state and judge that then it is the LED lamp of long bright fault if be not in, with its long bright/the long Reflector that goes out puts 1; Light for the long fault detect control LED lamp that goes out, judge according to magnitude of voltage whether the LED lamp is in illuminating state, do not judge that then it is the LED lamp of the long fault of going out if be not in illuminating state, with its long bright/the length Reflector that goes out puts 2.In other words, just long bright fault shows as control LED and extinguishes, but actual LED lighted, and the long fault of going out shows as control LED and lights, but actual LED is not lighted.
(2) through after the startup self-detection, need to determine which LED lamp this task uses, because long bright LED is not controlled, and keep illuminating state always, still be long bright fault if detect the LED lamp of the bright malfunction of length that has recorded in the self check step, then selecting it is to use lamp; Then do not select non-length to go out to work in the LED lamp of malfunction the shortest LED lamp of duration as using lamp if there is the LED lamp of long bright malfunction.
(3) in the course of work, the LED lamp also may break down at any time, therefore, must monitor in real time the LED lamp in the work, comprising:
(31) calculate in real time the duration that the LED lamp is in illuminating state, long data carries out real-time update during to the work of this LED lamp correspondence.
(32) monitor the voltage of each LED lamp in real time, judge its operating state.
(33) extinguish if detect the LED lamp that is in by illuminating state, then enter and lighted LED lamp abnormality processing step, namely to this LED lamp extinguish operation and with its long bright/the long Reflector that goes out puts 2, selects the shortest one of work duration to light operation from all the other normal LED lamps.
(34) be in the LED lamp that is extinguished state and light if detect, then enter and extinguished LED lamp abnormality processing step, namely select to use this LED, and with the length of this LED lamp bright/the long Reflector that goes out puts 1, and to normally being extinguished operation by the LED of illuminating state before.
Because the LED lamp may recover normal from fault, so the present invention is provided with the recovery detection counter, but the stability for the LED that guarantees from fault, to recover, therefore when value that the numerical value of the recovery detection counter storage of certain LED lamp must be preset greater than certain, could confirm this moment such as this LED etc. normally, and with the length of this LED lamp bright/the long Reflector and recover detection counter and put 0 of going out, this default value must be greater than 1.
Present embodiment is more excellent execution mode of the present invention, and the part that is not described in detail all adopts known mature technology.Need to prove; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (9)
1. the method for controlling backlight thereof of an instrument is characterized in that, comprising:
(1) startup self-detection step, the state of health data of each LED lamp that self-detection result is produced is stored;
(2) the LED lamp that uses according to the self-detection result selection of step (1);
(3) course of work monitoring is monitored in real time to the LED lamp in the work, and Monitoring Data is stored.
2. the method for controlling backlight thereof of a kind of instrument according to claim 1, it is characterized in that, described healthy shape data comprise grows bright/long Reflector that goes out, recover detection counter and work duration, wherein grow bright/long Reflector that goes out and equal 0 expression normal condition, equal 1 long bright malfunction of expression, equal 2 long malfunctions of going out of expression, recovery detection counter and work duration initial value are 0.
3. the method for controlling backlight thereof of a kind of instrument according to claim 1 is characterized in that, the startup self-detection step comprises:
(11) judge the LED lamp whether long bright malfunction is arranged in the LED lamp according to the state of health data of storage, then do not enter step (13) if having, then enter step (12) if having;
(12) whether the health status of LED lamp that detects the bright malfunction of this length still for long bright fault, if then withdraw from self check, and keep long bright/the long Reflector that goes out is 1, just enters step (13) if not;
(13) judge whether the LED lamp of the long malfunction of going out according to the data record of storage, then enter step (14) if having, retreat out self check if nothing is then carried out the health status inspection to all LED lamps;
(14) health status that detects the long trouble light that goes out fault whether still, if then do not change its long bright/the long Reflector that goes out, then the recovery detection counter of this lamp is added 1 if not, and withdraws from self check.
4. the method for controlling backlight thereof of a kind of instrument according to claim 3, it is characterized in that, when the numerical value of the recovery detection counter of certain LED lamp storage greater than default value, then with the length of this LED lamp bright/the long Reflector that goes out puts 0 and will recover detection counter and put 0.
5. the method for controlling backlight thereof of a kind of instrument according to claim 3 is characterized in that, selects the method for the LED lamp of use to be: still be long bright fault if detect the LED lamp of the bright malfunction of length that has recorded in the self check step, then selecting it is to use lamp; Then do not select non-length to go out to work in the LED lamp of malfunction the shortest LED lamp of duration as using lamp if there is the LED lamp of long bright malfunction.
6. the method for controlling backlight thereof of a kind of instrument according to claim 3 is characterized in that, the method for LED lamp health status inspection is comprised:
Long bright fault detect: control LED lamp extinguishes, detect the voltage between LED lamp and the matching resistor, judge according to magnitude of voltage whether the LED lamp is in and extinguish state, do not extinguish state and judge that then it is the LED lamp of long bright fault if be not in, with its long bright/the long Reflector that goes out puts 1;
The long fault detect of going out: control LED lamp is lighted, and judges according to magnitude of voltage whether the LED lamp is in illuminating state, does not judge that then it is the LED lamp of the long fault of going out if be not in illuminating state, with its long bright/the length Reflector that goes out puts 2.
7. the method for controlling backlight thereof of a kind of instrument according to claim 1 is characterized in that, the method that the LED lamp in the work is monitored in real time is:
(31) calculate in real time the duration that the LED lamp is in illuminating state, long data carries out real-time update during to the work of this LED lamp correspondence;
(32) monitor the voltage of each LED lamp in real time, judge its operating state;
(33) if detecting the LED lamp that is in by illuminating state extinguishes, then enter and lighted LED lamp abnormality processing step;
(34) if detect and be in the LED lamp that is extinguished state and light, then enter and extinguished LED lamp abnormality processing step.
8. the method for controlling backlight thereof of a kind of instrument according to claim 7 is characterized in that, is lighted LED lamp abnormality processing step to comprise:
To this LED lamp extinguish operation and with its long bright/the long Reflector that goes out puts 2, selects the shortest one of work duration to light operation from all the other normal LED lamps.
9. the method for controlling backlight thereof of a kind of instrument according to claim 7 is characterized in that, is extinguished LED lamp abnormality processing step to comprise:
Select to use this LED, and with the length of this LED lamp bright/the long Reflector that goes out puts 1, and to normally being extinguished operation by the LED of illuminating state before.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310266013.9A CN103347335B (en) | 2013-06-28 | 2013-06-28 | Backlight control method of instrument |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310266013.9A CN103347335B (en) | 2013-06-28 | 2013-06-28 | Backlight control method of instrument |
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| CN103347335A true CN103347335A (en) | 2013-10-09 |
| CN103347335B CN103347335B (en) | 2015-05-27 |
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| CN201310266013.9A Active CN103347335B (en) | 2013-06-28 | 2013-06-28 | Backlight control method of instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106371038A (en) * | 2016-08-16 | 2017-02-01 | 腾讯科技（深圳）有限公司 | Lighting equipment's health state determining method, apparatus and lighting equipment |
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| CN103347335B (en) | 2015-05-27 |
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Address after: 516006 Guangdong province Huizhou City Zhongkai high tech Zone and five West Road No. 103 Patentee after: HUIZHOU DESAY SV AUTOMOTIVE CO., LTD. Address before: 516006 Guangdong province Huizhou City Zhongkai high tech Zone and five West Road No. 103 Patentee before: Huizhou Desay SV Auto. Electronics Co., Ltd. |