CN101446748B - Human-computer interface and method of backlight unit of the human-computer interface - Google Patents
Human-computer interface and method of backlight unit of the human-computer interface Download PDFInfo
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- CN101446748B CN101446748B CN2008102046095A CN200810204609A CN101446748B CN 101446748 B CN101446748 B CN 101446748B CN 2008102046095 A CN2008102046095 A CN 2008102046095A CN 200810204609 A CN200810204609 A CN 200810204609A CN 101446748 B CN101446748 B CN 101446748B
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Abstract
The invention relates to a human-computer interface and a method of a backlight unit of the human-computer interface; the human-computer interface comprises a key, an optical inductor and an infrared ray inductor; when the human-computer interface is started, whether a limb of a user is positioned in a detecting distance is detected; the backlight unit is stated selectively; when the backlight unit is started, an infrared ray is transmitted to the key. The human-computer interface can automatically detect whether the environment light is dark, thus starting the backlight unit and transmitting the infrared ray to the key; therefore, the position of the human-computer interface, and the key position on the human-computer interface can be displayed in dark. The method can lead a user to rapidly find the human-computer interface even in the dark; besides, the human-computer interface has the advantages of power saving.
Description
Technical field
The invention relates to the startup method of a kind of man-machine interface and back light unit thereof, and particularly relevant for a kind of man-machine interface of induction type and the method for startup back light unit thereof.
Background technology
In the epoch now that development in science and technology is maked rapid progress, projector has become a part indispensable in modern's daily life.And the control mode of projector also is applied to the wireless technology of controlling gradually.By the wireless technology of controlling, make user and projector under the situation that keeps a distance, still can control projector.
In general, the wireless technology of controlling is applied to the man-machine interface of separating with projector more, for example is that telepilot is reached.
Yet, when using projector, generally need draw the curtain together, so that the clear projected picture of viewing and admiring, so telepilot will be in dark space, the user understands the difficult telepilot that finds.Perhaps, after the user turned off indoor electric lamps, and environment becomes dark by light, the user can run into the above-mentioned problem that is difficult to find telepilot similarly.
Summary of the invention
The invention relates to the method for a kind of man-machine interface and startup back light unit thereof.Whether man-machine interface can automatically be detected amount of ambient light too dark, to start a back light unit towards button emission light, to show the position of man-machine interface and the key position on the man-machine interface in dark.Method of the present invention can allow the user still be looked for man-machine interface apace in the middle of dark, and man-machine interface of the present invention has more the advantage of power saving.
The present invention proposes a kind of man-machine interface.Man-machine interface comprises button, optical inductor, infrared inductor and back light unit.Optical inductor is in order to detect an amount of ambient light.Infrared inductor optionally is activated, and whether when the infrared ray inductor is activated, can detect has user's limbs to be positioned at a detecting distance.Back light unit optionally is activated, and when back light unit is activated, can launch a light towards button.Wherein, if in a time point Ta, optical inductor detects (a) amount of ambient light and is transformed into one than low-light level by a higher brightness, and (b) higher brightness and poor above a default light quantity than the variable quantity between low-light level, infrared inductor is activated and continues to be activated one first period T1 from time point Ta, and infrared inductor continues to be activated to time point Ta+T1.Wherein, as if a time point Tb who continues to be activated in infrared inductor in the period, (1) infrared inductor that is activated detects user's limbs and is positioned at the detecting distance, back light unit is activated and continues to be activated one second period T2 from time point Tb, and back light unit continues to be activated to time point Tb+T2.The situation that above-mentioned back light unit is activated also can increase (2) optical inductor and detect the condition of amount of ambient light less than one second default light quantity, and (1) set up simultaneously with (2), and back light unit just can be activated.
A kind of man-machine interface that proposes according to the present invention.This man-machine interface comprises a button, an optical inductor, an infrared inductor and a back light unit.Optical inductor is in order to detect an amount of ambient light.Infrared inductor optionally is activated, and whether when the infrared ray inductor is activated, can detect has user's limbs to be positioned at a detecting distance.Back light unit optionally is activated, and when back light unit is activated, can launch a light towards button.Wherein, if in a time point Td, optical inductor detects amount of ambient light and is transformed into and is lower than the first default light quantity by being higher than one first default light quantity, and infrared inductor is activated and continues to be activated one the 4th period T4 from time point Td, and infrared inductor continues to be activated to time point Td+T4.Wherein, as if a time point Tb who continues to be activated in infrared inductor in the period, (1) but the infrared inductor that is activated detects the width of cloth penetrates the infrared ray object and be positioned at detecting distance, back light unit is activated and continues to be activated one second period T2 from time point Tb, and back light unit continues to be activated to time point Tb+T2.The situation that above-mentioned back light unit is activated also can increase the condition of " (2) optical inductor detects amount of ambient light less than one second default light quantity ", and (1) set up simultaneously with (2), and back light unit just can be activated.
A kind of method that starts the back light unit of man-machine interface that proposes according to the present invention.The method that starts the back light unit of man-machine interface may further comprise the steps.One man-machine interface is provided, and man-machine interface has a button, an optical inductor, an infrared inductor and a back light unit.Whether the amount of ambient light that optical inductor is located in order to detecting man-machine interface place also optionally is activated with detecting has user's limbs to be positioned at a detecting distance.Back light unit optionally is activated, to launch a light towards button.If in a time point Ta, optical inductor detects (a) amount of ambient light and is transformed into one than low-light level by a higher brightness, and (b) higher brightness and when surpassing a default light quantity difference than the variable quantity between low-light level, infrared inductor is activated and continues to be activated one first period T1 from time point Ta, and infrared inductor continues to be activated to time point Ta+T1.As if a time point Tb who continues to be activated in infrared inductor in the period, (1) infrared inductor that is activated detects user's limbs and is positioned at the detecting distance, back light unit is activated and continues to be activated one second period T2 from time point Tb, and back light unit continues to be activated to time point Tb+T2.The situation that above-mentioned back light unit is activated also can increase the condition of " (2) optical inductor detects amount of ambient light less than one second default light quantity ", and (1) set up simultaneously with (2), and back light unit just can be activated.
For foregoing of the present invention can be become apparent, embodiment cited below particularly, and conjunction with figs. elaborate.
Description of drawings
Fig. 1 is depicted as the synoptic diagram of the man-machine interface of one embodiment of the invention.
Fig. 2 is the functional block diagram of man-machine interface of the present invention.
Fig. 3 is positioned over synoptic diagram on the table for man-machine interface in the embodiment of the invention.
Fig. 4 A and Fig. 4 B are the method flow diagram that man-machine interface starts back light unit among Fig. 1.
Fig. 5 is the example of the oscillogram of the environment bright of the infrared inductor of the man-machine interface of meeting startup present embodiment.
Fig. 6 is another example of the environment bright oscillogram of the infrared inductor of the man-machine interface of meeting startup present embodiment.
Fig. 7 is the another kind of key-press status synoptic diagram of the infrared inductor of the man-machine interface of meeting startup present embodiment.
Fig. 8 is the example of the environment bright oscillogram of the back light unit 108 of the man-machine interface of meeting startup present embodiment.
Fig. 9 is another example of the environment bright oscillogram of the back light unit 108 of the man-machine interface of meeting startup present embodiment.
Embodiment
Please be simultaneously with reference to Fig. 1 and Fig. 2, Fig. 1 is the synoptic diagram according to the man-machine interface of one embodiment of the invention, Fig. 2 is the functional block diagram of man-machine interface among Fig. 1.Man-machine interface 100 comprises body 112, at least one button 102, optical inductor 104, infrared inductor 106, back light unit 108 and processing unit 110 (not being illustrated in Fig. 1).Body 112 has positive 114 and four the body sides 116 of a body, and body frontal width W1 is greater than body lateral width W2.Present embodiment is that a telepilot is that example is done explanation with man-machine interface 100, and right the present invention is not limited to this, and it is backlight that the button in the projector also can use this interface to control.
Please refer to Fig. 3, it is positioned over synoptic diagram on the table for the man-machine interface of present embodiment.Infrared inductor 106 for example is a passive infrared inductor (PASSIVE INFRARED SENSOR), and optionally processed unit 110 starts.Whether when infrared ray inductor 106 is activated, can detect has user's limbs to be positioned at a detecting distance D.The detecting distance D of infrared inductor 106 is for example less than 60 centimetres.The width W 3 of supposing the minor face 125 of desk 118 is 120 centimetres, and man-machine interface 100 is placed near desk 118 central authorities.So when being positioned at four limits of desk 118, user's limbs can exceed the detecting distance D.Have only when user's limbs move to desk 118 tops and can just might enter the detecting distance D.
As shown in Figure 3, when man-machine interface 100 is positioned on the desk 118, body front 114 is in fact towards vertical direction, if infrared inductor 106 is arranged at body front 114, when infrared ray inductor 106 is activated, can detect user's limbs (not illustrating), for example not be to use person's hand, whether move to man-machine interface 100 tops.
Perhaps, infrared inductor 106 also can be arranged on body positive 114 place in addition.For example, infrared inductor 106 also can be arranged on the body side 116 (body side 116 is illustrated in Fig. 1).When man-machine interface was positioned on the desk 118, body side 116 was towards horizontal direction.Infrared inductor 106 can be detected the space whether user's limbs move to man-machine interface 100 sides and desk 118 tops.
Below will introduce the method that man-machine interface 100 starts back light unit 108 in detail.
Please refer to Fig. 4 A and Fig. 4 B, it illustrates the method flow diagram of man-machine interface startup back light unit among Fig. 1.The method that man-machine interface 100 starts back light unit 108 may further comprise the steps.At first, please be simultaneously with reference to Fig. 5, it is the oscillogram example of the environment bright of the infrared inductor of the man-machine interface of meeting startup present embodiment.
In the step S202 of Fig. 4 A, whether optical inductor 104 detecting amount of ambient light are transformed into one than low-light level L2 and optical inductor detecting higher brightness L1 and whether poor above a default light quantity than the variable quantity LD between low-light level L2 by a higher brightness L1.Be transformed into than low-light level L2 and (2) higher brightness L1 by higher brightness L1 and preset light quantity two conditions that differ from and set up simultaneously with surpassing if optical inductor 104 detects (1) amount of ambient light than the variable quantity LD between low-light level L2, then enter step S204, if not, then enter step S212.
In step S204, if above-mentioned (1) (2) two conditions are set up simultaneously in time point Ta, then infrared inductor 106 starts processed unit 110 and continues to be activated the first period T1, for example is one hour.That is to say that infrared inductor 106 will continue to be activated to time point Ta+T1.In addition, though the first period T1 of present embodiment was that example explains with one hour, yet, in other embodiment,, the first period T1 uses length as long as meeting user's expection, and its time length is not subjected to the restriction of present embodiment.
In step S212, optical inductor 104 detecting amount of ambient light whether detect higher brightness L1 that amount of ambient light is higher than the first default light quantity S1 by (1) be transformed into (2) be lower than the first default light quantity S1 than low-light level L2; If then enter step S214; If not, then enter step S216.
In step S214, " be higher than the first default light quantity S1 be transformed into be lower than the first default light quantity S1 " condition (1) and condition (2) are when time point Td sets up if above-mentioned, then infrared inductor 106 starts processed unit 110 and continues to be activated the 4th period T4 from time point Td, and the 4th period T4 for example is one hour.That is infrared inductor 106 continues to be activated to time point Td+T4.
In step S216, whether processing unit 110 detecting buttons 102 are pressed, if then enter step S218; If not, then directly enter step S219.
In step S218, if the condition of above-mentioned " button 102 is pressed " is when time point Tc sets up, then with 110 startups of processed unit and continue to be activated the 3rd period T3, the 3rd period T3 for example is one hour to infrared inductor 106 from time point Tc.That is infrared inductor 106 continues to be activated to time point Tc+T3.
In step S219, processing unit 110 is according to (maximal value Td+T4) is set the 106 start-stop times of infrared inductor for Ta+T1, Tc+T3; So finish and once set the action of 106 start-stop times of infrared inductor.
The default light quantity difference of step S204 can be between 200 to 300 luxs (lux), and amount of ambient light for example is the variable quantity that measured gained in 5 seconds by the variable quantity LD that higher brightness L1 is transformed into than low-light level L2, and right the present invention also is not limited thereto.
The first default light quantity S1 for example is 100lux among the step S212, under this light quantity, has been not suitable for human eye and has read.That is to say that human eye is difficult to find the position of man-machine interface 100 under this light quantity, therefore need to start infrared inductor 106 and detect the user position, in time start back light unit 108.
In addition, if 110 a period of times of processing unit do not receive the situation that the wherein arbitrary condition of step S202, S212, S216 is set up, but then inference man-machine interface 100 or projector have been received to knapsack, drawer, or in the cupboard; Therefore optical inductor 104 detecting amount of ambient light perhaps change, but variable quantity is little, or all are lower than the first default light quantity S1 before and after changing.Therefore infrared inductor 106 need not to continue to be used for detecting environment, reduces the consuming cells electric energy and can be closed.This moment, processing unit 110 need not to upgrade the 106 start-stop times of infrared inductor again.
That is if the 106 start-stop times of infrared inductor arrive, as if step S202, S212, when the wherein arbitrary condition of S216 all fails to set up again, then infrared inductor 106 will remain on by the state of forbidden energy.So, length is used in the expection that had both met the user, can save the electrification of infrared inductor 106 again.
Then, shown in Fig. 4 B, in step S205, processing unit 110 judges at first whether the 106 start-stop times of infrared inductor arrive.If, then enter step S222, with infrared inductor 106 forbidden energy, forbid that promptly it is activated; If not, then enter step S206.
In step S206, whether optical inductor 104 detecting amount of ambient light are less than one second default light quantity S2, if then enter step S208; If not, then get back to step S205.
In step S208, the infrared inductor 106 that is activated detects user's limbs and whether is positioned at the detecting distance, if then enter step S210; If not, then get back to step S205.
In step S210, the condition of " whether user's limbs are positioned at the detecting distance " is set up in time point Tb if above-mentioned, and then back light unit 108 will be activated and continues to be activated one second period T2 from time point Tb; Also be that back light unit 108 will continue to be activated to time point Tb+T2, get back to step S205 then.
For example shown in Figure 8, it is the example of the environment bright oscillogram of the back light unit 108 of the man-machine interface of meeting startup present embodiment.
Now be that example is done explanation with Fig. 9, it is another example of the environment bright oscillogram of the back light unit 108 of the man-machine interface of meeting startup present embodiment.In time point Tb, user's limbs are detected by infrared inductor 106 and are positioned at the detecting distance D, at this moment, amount of ambient light is already less than the second default light quantity S2, for example when time point Ta3 less than the second default light quantity S2, so back light unit 108 is activated and continues to be activated the second period T2 in time point Tb.That is to say that after infrared ray inductor 106 is activated, satisfies user's limbs at the same time and be positioned under reconnaissance range D and the condition of amount of ambient light less than the second default light quantity S2, back light unit 108 just can start.
Say further, suppose in time point Ta that the user draws the curtain together and makes light quantity difference that indoor light reduces greater than LD, so infrared inductor 106 is continued to start the first period T1 in time point Ta.But amount of ambient light might still be higher than the second default light quantity S2 shown in Figure 8 at the first period Ta time point.Become clear owing to environment this moment, so although infrared inductor 106 is activated and user's limbs have entered in the detecting distance D, still do not need to start back light unit 108.
Suppose in the time point Tb of Fig. 8 or the time point Ta3 of Fig. 9, the user further closes indoor light is reduced under the second default light quantity S2 indoor illumination intensity, be activated and user's limbs have entered under the situation of detecting in the distance D at infrared inductor 106, optical inductor 104 detects amount of ambient light again less than the second default light quantity S2, just start back light unit 108, to have avoided the waste of electric power.
So, in the startup period of infrared inductor 106 (for example being the 4th period T4 of the first period T1, Fig. 6 of Fig. 5 or the 3rd period T3 of Fig. 7), detect user's limbs less than the second default light quantity S2 and infrared inductor 106 and enter under the situation of detecting distance D when optical inductor 104 detects amount of ambient light, processing unit 110 just can start back light unit 110, make back light unit 110 to button 102 emission light, make button 102 present bright attitude, and allow the user can in dark, see the button 102 that is bright attitude, find man-machine interface to make things convenient for the user.
The disclosed man-machine interface of the above embodiment of the present invention and start the method for back light unit has multiple advantages, below only enumerates the part advantage and is described as follows:
(1) because 106 of infrared inductors continue to be activated the first period T1, the 3rd period T3 or the 4th period T4, in these a little periods,, then pass through after these a little periods if infrared inductor 106 is not started once more, infrared inductor 106 is immediately by forbidden energy.So, length is used in the expection that had both met the user, can save the electrification of infrared inductor 106 again.
(2) be activated at infrared inductor 106, amount of ambient light is lower than a light quantity, when for example being the second default light quantity, and user's limbs have entered the following time of situation in the detecting distance D, back light unit 108 just can be activated.So, can avoid the power wastage of back light unit 108, can allow the user again in the environment of dark, find man-machine interface apace, can increase the convenience that man-machine interface is used.
Claims (12)
1. man-machine interface is characterized in that comprising:
Button;
Optical inductor is in order to detect an amount of ambient light;
Infrared inductor optionally is activated, and whether when this infrared inductor is activated, can detect has user's limbs to be positioned at a detecting distance; And
Back light unit optionally is activated, and when this back light unit is activated, can launch a light towards this button;
Wherein, in a time point Ta, this optical inductor detects (a) this amount of ambient light and is transformed into one than low-light level by a higher brightness, and (b) this higher brightness and should to surpass a default light quantity than the variable quantity between low-light level poor, this infrared inductor is activated and continues to be activated the first period T1 from this time point Ta point, and this infrared inductor continues to be activated to time point Ta+T1;
Wherein, continue to be activated a time point Tb in the period in this infrared inductor, (1) this optical inductor detects this amount of ambient light less than one second default light quantity, and this infrared inductor that (2) is activated detects these user's limbs and is positioned at this detecting distance, this back light unit is activated and continues to be activated the second period T2 from this time point Tb, and this back light unit continues to be activated to time point Tb+T2.
2. man-machine interface as claimed in claim 1, it is characterized in that described button is pressed in a time point Tc, this infrared inductor is activated and continues to be activated one the 3rd period T3 from this time point Tc, and this infrared inductor continues to be activated to time point Tc+T3.
3. man-machine interface as claimed in claim 1, it is characterized in that, in a time point Td, this optical inductor detects this amount of ambient light and is transformed into and is lower than this first default light quantity by being higher than one first default light quantity, this infrared inductor is activated and continues to be activated one the 4th period T4 from this time point Td, and this infrared inductor continues to be activated to time point Td+T4.
4. man-machine interface as claimed in claim 1 is characterized in that this man-machine interface has the positive and body side of a body, and this body frontal width is greater than this body lateral width;
When this man-machine interface was positioned on the desk, this body front was towards vertical direction, and this infrared inductor is arranged at this body front, can detect these user's limbs and whether move to this man-machine interface top;
Perhaps, when this man-machine interface was positioned on the desk, this body side was towards horizontal direction, and this infrared inductor is arranged at this body side, can detect these user's limbs and whether move to the horizontal side of this man-machine interface.
5. man-machine interface is characterized in that comprising:
Button;
Optical inductor is in order to detect an amount of ambient light;
Infrared inductor optionally is activated, and whether when this infrared inductor is activated, can detect has user's limbs to be positioned at a detecting distance; And
Back light unit optionally is activated, and when this back light unit is activated, can launch a light towards this button;
Wherein, in a time point Td, this optical inductor detects this amount of ambient light and is transformed into and is lower than this first default light quantity by being higher than one first default light quantity, this infrared inductor is activated and continues to be activated one the 4th period T4 from this time point Td, and this infrared inductor continues to be activated to time point Td+T4;
Wherein, continue to be activated a time point Tb in the period in this infrared inductor, (1) this optical inductor detects this amount of ambient light less than one second default light quantity, and this infrared inductor that (2) is activated detects these user's limbs and is positioned at this detecting distance, this back light unit is activated and continues to be activated one second period T2 from this time point Tb, and this back light unit continues to be activated to time point Tb+T2.
6. man-machine interface as claimed in claim 5 is characterized in that this button is pressed in a time point Tc, and this infrared inductor is activated and continues to be activated one the 3rd period T3 from this time point Tc, and this infrared inductor continues to be activated to time point Tc+T3.
7. man-machine interface as claimed in claim 5 is characterized in that this man-machine interface has the positive and body side of a body, and this body frontal width is greater than this body lateral width;
When this man-machine interface was positioned on the desk, this body front was towards vertical direction, and this infrared inductor is arranged at this body front, can detect these user's limbs and whether move to this man-machine interface top;
Perhaps, when this man-machine interface was positioned on the desk, this body side was towards horizontal direction, and this infrared inductor is arranged at this body side, can detect these user's limbs and whether move to the horizontal side of this man-machine interface.
8. man-machine interface as claimed in claim 7, the detecting distance that it is characterized in that this infrared inductor is less than 60 centimetres, when these user's limbs are positioned at this desk side, exceed this detecting distance, when these user's limbs move to this desk top, enter this detecting distance.
9. method that starts the back light unit of man-machine interface is characterized in that this method comprises:
One man-machine interface is provided, this man-machine interface has button, optical inductor, infrared inductor and back light unit, this optical inductor is in order to detect an amount of ambient light at this place, man-machine interface place, and optionally be activated with detecting and whether have user's limbs to be positioned at a detecting distance, this back light unit optionally is activated, to launch a light towards this button;
When in a time point Ta, this optical inductor detects (a) this amount of ambient light and is transformed into one than low-light level by a higher brightness, and (b) this higher brightness and should surpass a default light quantity difference than the variable quantity between low-light level the time, this infrared inductor is activated and continues to be activated the first period T1 from this time point Ta, and this infrared inductor continues to be activated to time point Ta+T1;
As a time point Tb who continues to be activated in this infrared inductor in the period, (1) this optical inductor detects this amount of ambient light less than one second default light quantity, and this infrared inductor that (2) is activated detects this user's limbs system and is positioned at this detecting distance, this back light unit is activated and continues to be activated the second period T2 from this time point Tb, and this back light unit continues to be activated to time point Tb+T2.
10. the method for the back light unit of startup man-machine interface as claimed in claim 9 is characterized in that this light quantity difference is between 200 to 300 luxs.
11. the method for the back light unit of startup man-machine interface as claimed in claim 9 is characterized in that this amount of ambient light variable quantity is for measuring the variable quantity of gained in 5 seconds.
12. the method for the back light unit of startup man-machine interface as claimed in claim 9, it is characterized in that more comprising the steps: in a time point Td, this optical inductor detects this amount of ambient light and is transformed into and is lower than this first default light quantity by being higher than one first default light quantity, this infrared inductor is activated and continues to be activated one the 4th period T4 from this time point Td, and this infrared inductor continues to be activated to time point Td+T4.
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| CN102541243A (en) * | 2010-12-21 | 2012-07-04 | 联想(北京)有限公司 | Computer, electronic equipment and lighting control method |
| CN102802300A (en) * | 2011-05-26 | 2012-11-28 | 鸿富锦精密工业（深圳）有限公司 | Key indicator lamp controlling method and system |
| CN103294208A (en) * | 2012-03-05 | 2013-09-11 | 联想(北京)有限公司 | Information processing method and input device and electronic equipment |
| CN103634968B (en) * | 2012-08-23 | 2016-03-30 | 联想(北京)有限公司 | A kind of method and device controlling backlight |
| CN103179748A (en) * | 2013-02-04 | 2013-06-26 | 广东美的制冷设备有限公司 | Remote control, and backlight control method and backlight control system thereof |
| CN107906680A (en) * | 2017-10-02 | 2018-04-13 | 广东美的制冷设备有限公司 | Infrared sensor control process method, apparatus, air conditioner and readable storage medium storing program for executing |
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