CN104661397A - Key backlight lamp adjusting system and adjusting method - Google Patents
Key backlight lamp adjusting system and adjusting method Download PDFInfo
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- CN104661397A CN104661397A CN201410087751.1A CN201410087751A CN104661397A CN 104661397 A CN104661397 A CN 104661397A CN 201410087751 A CN201410087751 A CN 201410087751A CN 104661397 A CN104661397 A CN 104661397A
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Abstract
The invention discloses a key backlight lamp adjusting system. Distance sensors of the system are arranged beside keys and transmit acquired signals to a controller; the controller outputs backlight lamp brightness control signals to backlight lamp units. According to the system, the distance between a finger and a key can be calculated, and the brightness of a backlight lamp is changed according to the distance, so that key background lamps have interactive reaction on the use of people, and the user experience is greatly improved.
Description
Technical field
The present invention relates to the regulating system of key backlight lamp, particularly relate to the key-press backlight lamp system be applied on indoor apparatus of air conditioner, remote controller.
Background technology
At present, the button that air-conditioning uses is mostly sense of touch button or physical button, and usual button is furnished with background light, and in order to point out user operation, the background light brightness of its button is normally changeless, be generally light at user key-press rear backdrop lamp.
Nowadays, the button also on some air-conditioning panel has the function of human body sensing, and namely when user is near panel, background light is lighted automatically, user-friendly.But such backlight system brightness is single, and hand is when button, and backlight is lighted according to predetermined luminance, lack man-machine interaction.
Summary of the invention
Technical problem to be solved by this invention realizes a kind of distance can judging finger and button, and according to distance, key backlight lamp brightness is changed.
To achieve these goals, the technical solution used in the present invention is: key backlight lamp regulating system, the range sensor of this system is arranged on by button, the signal of collection is delivered to controller by described range sensor, and described controller exports brightness of backlight and controls signal to backlight unit.
The backlight of described backlight unit is LED, and it is pwm pulse width signal that described controller exports brightness of backlight control signal, and is delivered to LED by LED drive circuit.
Described range sensor is provided with multiple.
Described backlight is the backlight of indoor apparatus of air conditioner button or remote controller key.
Key backlight lamp control method, control method is as follows:
System starts;
Range sensor Real-time Collection information is also delivered to controller;
When controller receives the close signal of object, and object distance is less than pre-set threshold value then outputs control signals to backlight unit, lights backlight;
Controller controls backlight, and nearer with object distance, brightness of backlight is larger, far away with object distance, and brightness of backlight is less;
When controller receives the signal that object leaves, and object distance is greater than pre-set threshold value then outputs control signals to backlight unit, closes backlight or maintains minimum brightness.
Further, described controller is preset between some distance regions, and each interval corresponding brightness of backlight value, when having object near falling into respective distance interval, then lights backlight according to corresponding brightness of backlight value.
Further, comprise between described distance regions and be greater than between L3, L3 and L2, between L2 and L1, between 0 and L1, wherein L1<L2<L3;
Further, corresponding brightness of backlight value is: be greater than L3, and brightness is 0% of high-high brightness; Between L3 and L2, brightness is 25% of high-high brightness; Between L2 and L1, brightness is 50% of high-high brightness; Between 0 and L1, brightness is 75% of high-high brightness; During finger key, brightness is 100% of high-high brightness.
Further, described L3 is less than 10cm.
The invention has the advantages that, this system can calculate finger and the distance of button, and changes brightness of backlight according to distance, and like this, button background lamp can have interactively reaction during use to people, substantially increases Consumer's Experience.
Accompanying drawing explanation
Mark in the content expressed every width accompanying drawing in specification of the present invention below and figure is briefly described:
Fig. 1 is key backlight lamp regulating system block diagram;
Fig. 2 is key backlight lamp control method flow chart;
Mark in above-mentioned figure is: 1, controller; 2, range sensor; 3, LED drive circuit; 4, backlight.
Embodiment
Known see Fig. 1, this system comprises range sensor 2, controller 1 and backlight unit, and range sensor 2 is mainly used in measuring the approximate distance between finger and button.Range sensor 2 can adopt ISL29028 range sensor, and controller 1 carries out exchanges data by i2c and range sensor 2, and transducer 2 of adjusting the distance carries out optimum configurations, setting measurement threshold value.When user is at button, point when close to range sensor 2, distance is lower than distance threshold, then signal is delivered to controller 1 by range sensor 2.
The backlight 4 preferably LED of backlight unit, it mainly comprises the LED drive circuit 3 of LED and connection control device 1 and LED, controller 1 changes forward current ON time to reach brightness adjustment effect by PWM light modulation by opening and closing LED, though switch motion may cause light flash, as long as frequency just can allow human eye discover more than 100Hz.Our eyes can the on average conducting of LED and deadline, and with the sensation causing LED dimmed, its brightness is then directly proportional to the LED conducting duty cycle.
For air-conditioning products, backlight 4 is mainly the backlight of indoor apparatus of air conditioner button or remote controller key.For judging that finger is in different positions, the multiple range sensor 2 of corresponding employing, set different distance thresholds to it respectively, the signal transmitted by transducer 2 of adjusting the distance like this is processed, and can know the approximate location of finger.If judged N number of distance, so need to adopt N number of range sensor 2, in addition, also can be furnished with a range sensor 2 by each backlight 4, each range sensor 2 controls the circuit degree of a backlight 4.
Known see Fig. 2, key backlight lamp control method is as follows:
System starts;
Range sensor Real-time Collection information is also delivered to controller;
When controller receives the close signal of object, and object distance is less than pre-set threshold value then outputs control signals to backlight unit, lights backlight;
Controller controls backlight, nearer with object distance, brightness of backlight is larger, far away with object distance, brightness of backlight is less, can by apart from presetting between some distance regions, each interval corresponding brightness of backlight value, when having object near falling into respective distance interval, then light backlight according to corresponding brightness of backlight value.Such as can be set between distance regions: be greater than between L3, L3 and L2, between L2 and L1, between 0 and L1, wherein L1<L2<L3; Corresponding brightness of backlight value is: be greater than L3, and brightness is 0% of high-high brightness; Between L3 and L2, brightness is 25% of high-high brightness; Between L2 and L1, brightness is 50% of high-high brightness; Between 0 and L1, brightness is 75% of high-high brightness; During finger key, brightness is 100% of high-high brightness, and such a interval quantitative design, can ensure system reliability, also can make system reach conveniently span from button more close to, the effect that brightness is larger;
When controller receives the signal that object leaves, and object distance is greater than pre-set threshold value then outputs control signals to backlight unit, closes backlight or maintains minimum brightness.
In addition, for guaranteeing to avoid erroneous judgement, L3 need be less than 10cm, avoids backlight 4 frequently to light extinguishing.
Claims (8)
1. key backlight lamp regulating system, is characterized in that: the range sensor of this system is arranged on by button, and the signal of collection is delivered to controller by described range sensor, and described controller exports brightness of backlight and controls signal to backlight unit.
2. key backlight lamp regulating system according to claim 1, is characterized in that: the backlight of described backlight unit is LED, and it is pwm pulse width signal that described controller exports brightness of backlight control signal, and is delivered to LED by LED drive circuit.
3. key backlight lamp regulating system according to claim 2, is characterized in that: described range sensor is provided with multiple.
4. the key backlight lamp regulating system according to claim 1,2 or 3, is characterized in that: described backlight is the backlight of indoor apparatus of air conditioner button or remote controller key.
5. key backlight lamp control method, is characterized in that:
System starts;
Range sensor Real-time Collection information is also delivered to controller;
When controller receives the close signal of object, and object distance is less than pre-set threshold value then outputs control signals to backlight unit, lights backlight;
Controller controls backlight, and nearer with object distance, brightness of backlight is larger, far away with object distance, and brightness of backlight is less;
When controller receives the signal that object leaves, and object distance is greater than pre-set threshold value then outputs control signals to backlight unit, closes backlight or maintains minimum brightness.
6. key backlight lamp control method according to claim 5, is characterized in that:
Described controller is preset between some distance regions, and each interval corresponding brightness of backlight value, when having object near falling into respective distance interval, then lights backlight according to corresponding brightness of backlight value.
7. key backlight lamp control method according to claim 6, is characterized in that:
Comprise between described distance regions and be greater than between L3, L3 and L2, between L2 and L1, between 0 and L1, wherein L1<L2<L3;
Corresponding brightness of backlight value is: be greater than L3, and brightness is 0% of high-high brightness; Between L3 and L2, brightness is 25% of high-high brightness; Between L2 and L1, brightness is 50% of high-high brightness; Between 0 and L1, brightness is 75% of high-high brightness; During finger key, brightness is 100% of high-high brightness.
8. key backlight lamp control method according to claim 7, is characterized in that: described L3 is less than 10cm.
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 |
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| Application Number | Priority Date | Filing Date | Title |
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| 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 |
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| CN104661397A true CN104661397A (en) | 2015-05-27 |
| CN104661397B 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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| 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 |
| CN113267943A (en) * | 2021-04-20 | 2021-08-17 | 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN113267943A (en) * | 2021-04-20 | 2021-08-17 | 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 |
| 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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| Publication number | Publication date |
|---|---|
| CN104661397B (en) | 2018-08-24 |
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