CN104661397B - Key backlight lamp regulating system and its adjusting method - Google Patents
Key backlight lamp regulating system and its adjusting method Download PDFInfo
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- CN104661397B CN104661397B CN201410087751.1A CN201410087751A CN104661397B CN 104661397 B CN104661397 B CN 104661397B CN 201410087751 A CN201410087751 A CN 201410087751A CN 104661397 B CN104661397 B CN 104661397B
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- backlight
- brightness
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- range sensor
- distance
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Abstract
Present invention is disclosed a kind of key backlight lamp regulating system, the range sensor of the system is arranged by button, and the signal of acquisition is delivered to controller by the range sensor, and the controller exports brightness of backlight and controls signal to backlight unit.The system can calculate finger at a distance from button, and change brightness of backlight according to distance, in this way, button background lamp can substantially increase user experience to there is interactive reaction when the use of people.
Description
Technical field
The present invention relates to the regulating systems of key backlight lamp, more particularly to apply on air conditioner indoor unit, remote controler by
Key backlight system.
Background technology
Currently, the button used on air-conditioning is mostly sense of touch button or physical button, usual button is furnished with background light, to
Prompt user's operation, the background light brightness of button be usually fixed it is constant, usually in user key-press rear backdrop lamp point
It is bright.
Nowadays, the button also on some air-conditioning panels has the function of human body sensing, i.e., when user is close to panel, background
Lamp is lighted automatically, user-friendly.But such backlight system brightness is single, and when hand is close to button, backlight is according to pre-
If brightness is lighted, lack man-machine interaction.
Invention content
The technical problem to be solved by the present invention is to realize it is a kind of can judge finger at a distance from button, and according to away from
Variation is generated from key backlight lamp brightness is made.
To achieve the goals above, the technical solution adopted by the present invention is：Key backlight lamp regulating system, the system away from
It is arranged by button from sensor, the signal of acquisition is delivered to controller by the range sensor, and the controller is defeated
Go out brightness of backlight and controls signal to backlight unit.
The backlight of the backlight unit is LED, and it is pwm that the controller, which exports brightness of backlight control signal,
Pulse width signal, and LED is delivered to by LED drive circuit.
The range sensor is equipped with multiple.
The backlight is the backlight of air conditioner indoor unit button or remote controller key.
Key backlight lamp adjusting method, control method are as follows：
System starts；
Range sensor acquires information and is delivered to controller in real time；
When controller receives the close signal of object, and object distance is then output control signals to less than pre-set threshold value
Backlight unit lights backlight；
Controller controls backlight, and closer with object distance, brightness of backlight is bigger, remoter with object distance, backlight
Brightness is smaller；
When controller receives the signal that object leaves, and object distance is then output control signals to more than pre-set threshold value
Backlight unit closes backlight or maintains minimum brightness.
Further, the controller is preset several apart from section, and each section corresponds to a brightness of backlight value, when
There is object close to respective distance section is fallen into, then lights backlight according to corresponding brightness of backlight value.
Further, it is described apart from section include be more than between L3, L3 and L2, between L2 and L1,0 and L1 between,
Middle L1<L2<L3；
Further, corresponding brightness of backlight value is:More than L3, brightness is the 0% of maximum brightness;Between L3 and L2, brightness
It is the 25% of maximum brightness;Between L2 and L1, brightness is the 50% of maximum brightness;Between 0 and L1, brightness is the 75% of maximum brightness;
When finger key, brightness is the 100% of maximum brightness.
Further, the L3 is less than 10cm.
It is an advantage of the current invention that the system can calculate finger at a distance from button, and backlight is changed according to distance
Lamp brightness, in this way, button background lamp can substantially increase user experience to there is interactive reaction when the use of people.
Description of the drawings
The content of every width attached drawing expression in description of the invention and the label in figure are briefly described below：
Fig. 1 is key backlight lamp regulating system block diagram；
Fig. 2 is key backlight lamp adjusting method flow chart；
Label in above-mentioned figure is：1, controller；2, range sensor；3, LED drive circuit；4, backlight.
Specific implementation mode
Referring to Fig. 1 it is found that the system includes range sensor 2, controller 1 and backlight unit, range sensor 2 is main
For measuring the approximate distance between finger and button.ISL29028 range sensors, controller 1 can be used in range sensor 2
Data exchange is carried out by i2c and range sensor 2, sensor 2 of adjusting the distance carries out parameter setting, setting measurement threshold value.When with
In button, for finger when close to range sensor 2, distance is less than distance threshold, then signal is delivered to by range sensor 2 at family
Controller 1.
The 4 preferred LED of backlight of backlight unit includes mainly LED and connects the LED driving electricity of controller 1 and LED
Road 3, controller 1 is dimmed by PWM changes forward current turn-on time to reach brightness adjustment effect by opening and closing LED
Fruit can allow human eye that can not discover though switch motion may cause light flash but as long as frequency is more than 100Hz.Our eye
Eyeball can be averaged the on and off time of LED, and with the feeling for causing LED dimmed, the duty cycle is then connected at just in brightness with LED
Than.
For air-conditioning products, backlight 4 is mainly the backlight of air conditioner indoor unit button or remote controller key.To judge
Finger uses multiple range sensors 2, sets different distance thresholds to it respectively accordingly in different positions, logical in this way
It crosses the signal that sensor 2 transmits of adjusting the distance to be handled, it is known that the approximate location of finger.If sentenced to N number of distance
Disconnected, then needing to use N number of range sensor 2, in addition it is also possible to which each backlight 4 is matched, there are one range sensors 2, each
Range sensor 2 controls the circuit degree of a backlight 4.
Referring to Fig. 2 it is found that key backlight lamp adjusting method is as follows：
System starts；
Range sensor acquires information and is delivered to controller in real time；
When controller receives the close signal of object, and object distance is then output control signals to less than pre-set threshold value
Backlight unit lights backlight；
Controller controls backlight, and closer with object distance, brightness of backlight is bigger, remoter with object distance, backlight
Brightness is smaller, can will be apart from default several apart from section, each section corresponds to a brightness of backlight value, when there is object close
Respective distance section is fallen into, then lights backlight according to corresponding brightness of backlight value.Such as it can be set as apart from section：It is more than
Between L3, L3 and L2, between L2 and L1,0 and L1 between, wherein L1<L2<L3；Accordingly brightness of backlight value is:It is bright more than L3
Degree is the 0% of maximum brightness;Between L3 and L2, brightness is the 25% of maximum brightness;Between L2 and L1, brightness is maximum brightness
50%;Between 0 and L1, brightness is the 75% of maximum brightness;When finger key, brightness is the 100% of maximum brightness, such a
Section quantitative design both can guarantee system reliability, and system can also reached, and span conveniently is closer from button, the bigger effect of brightness
Fruit；
When controller receives the signal that object leaves, and object distance is then output control signals to more than pre-set threshold value
Backlight unit closes backlight or maintains minimum brightness.
In addition, to ensure to avoid erroneous judgement, L3 need to be less than 10cm, backlight 4 is avoided frequently to light extinguishing.
Claims (2)
1. the adjusting method of key backlight lamp regulating system, it is characterised in that：
The range sensor of the key backlight lamp regulating system is arranged by button, and the range sensor is by the letter of acquisition
It number is delivered to controller, the range sensor is carried on the back for measuring the distance between finger and button, controller output
Light lamp brightness control signal to backlight unit, controller controls backlight, and closer with object distance, brightness of backlight is bigger,
Remoter with object distance, brightness of backlight is smaller；The backlight is the backlight of air-conditioning remote control button;
The backlight of the backlight unit is LED, and it is pwm pulsewidths that the controller, which exports brightness of backlight control signal,
Signal, and LED is delivered to by LED drive circuit, the controller is preset several apart from section, each section correspondence one
Brightness of backlight value then lights backlight when having object close to respective distance section is fallen into according to corresponding brightness of backlight value;
This method further comprises:System starts；
Range sensor acquires information and is delivered to controller in real time；
Adjusting method based on the key backlight lamp regulating system：
When controller receives the close signal of object, and object distance then outputs control signals to backlight less than pre-set threshold value
Lamp unit, lights backlight；
Controller controls backlight, and closer with object distance, brightness of backlight is bigger, remoter with object distance, brightness of backlight
It is smaller；
When controller receives the signal that object leaves, and object distance then outputs control signals to backlight more than pre-set threshold value
Lamp unit closes backlight or maintains minimum brightness;
It is described apart from section include be more than between L3, L3 and L2, between L2 and L1,0 and L1 between, wherein L1<L2<L3；
Accordingly brightness of backlight value is:More than L3, brightness is the 0% of maximum brightness;Between L3 and L2, brightness is most light
The 25% of degree;Between L2 and L1, brightness is the 50% of maximum brightness;Between 0 and L1, brightness is the 75% of maximum brightness;Finger is pressed
When key, brightness is the 100% of maximum brightness;
The L3 is less than 10cm.
2. adjusting method according to claim 1, it is characterised in that：The range sensor is equipped with multiple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410087751.1A CN104661397B (en) | 2013-11-21 | 2014-03-11 | Key backlight lamp regulating system and its adjusting method |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310590371 | 2013-11-21 | ||
| CN2013105903715 | 2013-11-21 | ||
| CN201410087751.1A CN104661397B (en) | 2013-11-21 | 2014-03-11 | Key backlight lamp regulating system and its adjusting method |
Publications (2)
| Publication Number | Publication Date |
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| CN104661397A CN104661397A (en) | 2015-05-27 |
| CN104661397B true CN104661397B (en) | 2018-08-24 |
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| CN201410087751.1A Active CN104661397B (en) | 2013-11-21 | 2014-03-11 | Key backlight lamp regulating system and its adjusting method |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106679082A (en) * | 2016-12-23 | 2017-05-17 | 广东美的制冷设备有限公司 | Air conditioner and display control method and device thereof |
| CN108260260A (en) * | 2016-12-28 | 2018-07-06 | 博西华电器（江苏）有限公司 | For the lighting system control method, device and kitchen ventilator of kitchen ventilator |
| CN113133170A (en) * | 2019-12-31 | 2021-07-16 | 青岛海尔智能家电科技有限公司 | Control method and control device for intelligent switch and intelligent switch |
| CN113267943B (en) * | 2021-04-20 | 2022-07-08 | 当趣网络科技(杭州)有限公司 | Method for adjusting brightness of standby indicator light, projector and readable storage medium |
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| KR100949112B1 (en) * | 2007-12-17 | 2010-03-22 | 윤순병 | System and method for sensing indoor |
| KR101495164B1 (en) * | 2008-04-10 | 2015-02-24 | 엘지전자 주식회사 | Mobile terminal and method for processing screen thereof |
| CN202126825U (en) * | 2011-07-21 | 2012-01-25 | 北京京东方光电科技有限公司 | Luminance control device and display |
| CN203177408U (en) * | 2013-04-24 | 2013-09-04 | 海尔集团公司 | Air conditioning |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101299807A (en) * | 2007-04-30 | 2008-11-05 | 深圳Tcl新技术有限公司 | Display device capable of automatically regulating display parameter as well as implementation method thereof |
| CN101815127A (en) * | 2010-04-12 | 2010-08-25 | 中兴通讯股份有限公司 | Mobile terminal and method for adjusting visual effect of screen thereof |
| CN102821210A (en) * | 2012-08-21 | 2012-12-12 | 广东欧珀移动通信有限公司 | Power-saving method for reading with intelligent terminal |
| CN103002349A (en) * | 2012-12-03 | 2013-03-27 | 深圳创维数字技术股份有限公司 | Adaptive adjustment method and device for video playing |
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| CN104661397A (en) | 2015-05-27 |
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