CN101515195A - Method for controlling shutting of display device backlight and device thereof - Google Patents
Method for controlling shutting of display device backlight and device thereof Download PDFInfo
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- CN101515195A CN101515195A CNA2009100797304A CN200910079730A CN101515195A CN 101515195 A CN101515195 A CN 101515195A CN A2009100797304 A CNA2009100797304 A CN A2009100797304A CN 200910079730 A CN200910079730 A CN 200910079730A CN 101515195 A CN101515195 A CN 101515195A
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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
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a method for controlling shutting of a display device backlight and a device thereof. The method comprises the following steps: the equipment belonging to the display device transmits infrared ray signals when the backlight of the display device is on; the distance between the display device and the human body is calculated according to the infrared ray signals reflected by human body; and the backlight of the display device is shut when the distance between the display device and the human body exceeds the range of set value. Utilizing the method can detect service condition of the display device for users by utilizing infrared ray, control shut of the display device backlight according to the service condition, and realize automatically shutting the backlight of the display device, thus the power consumption of the display device is reduced. Therefore, the embodiment of the invention can flexibly control the shutting of the backlight and reduce the power consumption of display device under the condition that the display device can be normally used by users.
Description
Technical field
The present invention relates to the display technique field, relate in particular to the method and the device of control shutting of display device backlight.
Background technology
Continuous development along with science and technology, the function of portable equipment such as mobile phone, palm PC is more and more perfect, this has greatly satisfied people's various demands in daily life, but the thing followed is the significantly increase of portable equipment overall power, and this also makes power problems become a key factor of restriction portable set development.Therefore how reducing portable apparatus power consumption has become urgent problem.
Because generally all have display device in the portable equipment, and the backlight power consumption of display device has accounted for a big chunk of whole display device power consumption, therefore, reducing power consumption backlight is a kind of important method of effectively controlling the display device power consumption.The method of going out in the pass backlight of at present general control display device is: after the time span of keyboard or mouse shut-down operation surpasses predefined time span, close by software backlight, to reduce unnecessary backlight power consumption.
But, when reality is used display device, how long close backlight not easy to operate after keyboard or the mouse shut-down operation.For example, people by screen watch document, when appreciating video, just once in a while can operation keyboard or mouse, but if when the user watches document or video, go to close backlight according to the time span that is provided with, will interrupt viewing and admiring or using of user, this is obviously unreasonable.
Summary of the invention
Embodiments of the invention provide a kind of method and device of controlling shutting of display device backlight, can use the situation of display device according to the user, close the backlight of display device automatically, reduce the power consumption of display device.
The embodiment of the invention provides a kind of method of controlling shutting of display device backlight, comprising:
When the backlight open of display device, the equipment emission infrared signal under the described display device;
According to the infrared signal of human body reflection, calculate the distance of described display device and human body;
The embodiment of the invention provides a kind of display device, comprises the device of controlling shutting of display device backlight, and described device comprises:
Infra-red ray transmitting unit is used for when the backlight open of display device, the emission infrared signal;
The infrared ray receiving element is used to receive the infrared signal that human body reflects;
Computing unit, the infrared signal that the human body that is used for receiving according to described infrared ray receiving element reflects, the distance of calculation display spare and human body;
Control module is used for the result of calculation according to described computing unit, when the distance of human body and described display device exceeds range of set value, closes the backlight of described display device.
The technical scheme that is provided by the embodiment of the invention described above as can be seen, utilize the infrared detection user to use the situation of display device, and control the backlight of display device according to this operating position and close, realized closing automatically the backlight of display device, reduce the power consumption of display device.Therefore, the embodiment of the invention can be controlled the backlight of display device flexibly and close ensureing that the user normally uses under the situation of display device, reduces the power consumption of display device.
Description of drawings
The method flow synoptic diagram that Fig. 1 provides for the embodiment of the invention one;
The processing procedure synoptic diagram that Fig. 2 provides for the embodiment of the invention two;
The processing procedure synoptic diagram that Fig. 3 provides for the embodiment of the invention three;
The structural representation of the control shutting of display device backlight device that Fig. 4 provides for the embodiment of the invention.
Embodiment
In embodiments of the present invention,, provide a kind of method of controlling shutting of display device backlight, specifically can comprise for reducing the power consumption of display device: when the backlight open of display device, the equipment emission infrared signal under the described display device; According to the infrared signal of human body reflection, the distance of calculation display spare and human body; When the distance of human body and described display device exceeds range of set value, close the backlight of described display device.Thereby realize that controlling the backlight of display device according to user's operating position closes, and reduces the power consumption of display device.
Below with reference to specific embodiment the method for above-mentioned control shutting of display device backlight is further introduced.
Embodiment one
Below in conjunction with Fig. 1 to the control shutting of display device backlight of the embodiment of the invention one method flow be described in detail.As shown in Figure 1, flow process can comprise as follows:
11: when the backlight open of display device, the equipment emission infrared signal under the described display device;
12:, calculate the distance of described display device and human body according to the infrared signal of human body reflection;
For example, the mistiming according to this equipment emission infrared signal during, the distance of calculation display spare and human body with the infrared signal that receives the reflection of user's human body;
13: when the distance of human body and described display device exceeds range of set value, close the backlight of described display device; Concrete, if the distance of display device that calculates and human body has exceeded the scope of setting value, can think that then the user has been in the state that does not use display device, so close the backlight of display device; When the distance of human body and display device is in range of set value, keep the backlight open state of described display device.Promptly whether the distance according to user's human body and display device exceeds range of set value, judges the operating position that the user is current.
Describe according to above-mentioned method, can utilize infrared detection user's operating position, and control the backlight of display device according to user's operating position and close, realized closing automatically the backlight of display device, reduce the power consumption of display device.
Embodiment two
In this embodiment, how main the description closes according to user's operating position control the backlight of mobile phone.
In the practical application, when the user mobile phone is placed on receive calls in one's ear or do not use mobile phone that mobile phone is empocketed after, infrared detection has exceeded the scope of setting value to the distance of mobile phone and human body, so close the backlight of mobile phone, reach the purpose that reduces the mobile phone power consumption.
In this embodiment, as shown in Figure 2, corresponding concrete processing procedure can comprise:
21: behind the backlight open of mobile phone, mobile phone emission infrared signal;
22: receive the infrared signal of human body reflection, and calculate the distance of mobile phone and human body; Concrete, can calculate the distance of mobile phone and human body according to the mistiming of the emission infrared signal in the infrared signal and 21 of user's human body reflection; For example, the distance of setting mobile phone and human body is during less than 10cm, thinks promptly that the user is in not watch screen state, for example mobile phone is placed on the state that receives calls or mobile phone is empocketed in one's ear; Or the distance of mobile phone and human body thinks that promptly the user is in the state of not watching display screen during greater than 40cm; And the distance of mobile phone and human body during less than 40cm, thinks promptly that the user is in the state of watching display screen more than or equal to 10cm;
23: when the distance of human body and mobile phone exceeds range of set value, close the backlight of display device; When the distance of human body and mobile phone is in range of set value, keep the backlight open state of mobile telephone display spare.Concrete, for example, if the distance of the mobile phone that calculates and human body during less than 10cm or greater than 40cm, can think then that the user has been in the state of not watching display screen (comprise user receive calls at this moment or mobile phone is put into the situation of pocket), so close the backlight of display device; Perhaps the distance of mobile phone and human body during less than 40cm, thinks promptly that the user is in the state of watching display screen more than or equal to 10cm, so keep the opening that is in backlight of display device.Certainly, in concrete the application, range of set value also can be other value, and for example range of set value is less than 30cm, and greater than 15cm or the like, present embodiment only illustrates.
Certainly, in the practical application, can also set the permission time that exceeds setting value (distance), promptly the distance at human body and mobile phone exceeds range of set value, and the duration exceeds schedule time after the length, closes the backlight of display device again, to adapt to the of short duration situation about frameing out of user.
Describe according to above-mentioned method, can utilize the infrared detection user to use the situation of mobile phone, and control the backlight of display device according to the distance of mobile phone and human body and close, realized ensureing that the user normally uses under the situation of display device, control the backlight of display device closed flexibly, reduces the power consumption of display device.
Embodiment three
In this embodiment, how main the description controls closing of palm PC display backlight according to user's operating position.
In the practical application, when the user palm PC is placed on receive calls in one's ear or do not use palm PC to put it into to go in the pocket after, infrared detection has exceeded the scope of setting value to the distance of palm PC and human body, so close the display backlight of palm PC, reach the purpose that reduces the palm PC power consumption.
In this embodiment, as shown in Figure 3, corresponding concrete processing procedure can comprise:
31: after the display backlight of palm PC is opened, palm PC emission infrared signal;
32: receive the infrared signal of human body reflection, and calculate the distance of palm PC and human body; Concrete, can calculate the distance of palm PC and human body according to the mistiming of emission infrared signal with the infrared signal that receives the reflection of user's human body; For example, the distance of setting palm PC and human body thinks that promptly the user is in the display screen state of not watching during less than 10cm, and for example the user is placed on palm PC the state that receives calls or palm PC is empocketed in one's ear; When the distance of palm PC and human body during, think that promptly the user is in the state of not watching display screen greater than 40cm; And the distance of palm PC and human body during less than 40cm, thinks promptly that the user is in the state of watching display screen more than or equal to 10cm;
33: when the distance of human body and palm PC exceeds range of set value, close display backlight (certainly, also can close display screen during concrete operations); Concrete, for example, if the distance of the palm PC that calculates and human body during less than 10cm or greater than 40cm, can think then that the user has been in the state of not watching display screen (comprise user receive calls at this moment or palm PC is put into the situation of pocket), so close display backlight; Perhaps the distance of palm PC and human body during less than 40cm, thinks promptly that the user is in the state of watching display screen more than or equal to 10cm, so keep display backlight to be in opening.
Certainly, in the practical application, can also set the permission time that exceeds setting value (distance), promptly the distance at human body and palm PC exceeds range of set value, and the duration exceeds schedule time after the length, closes the backlight of display device again, to adapt to the of short duration situation about frameing out of user.
Describe according to above-mentioned method, can utilize the infrared detection user to use the situation of palm PC, and come backlight the closing of control display screen according to the distance of palm PC and human body, for example, when the user appreciates video by palm PC, though in the process of appreciating video, display screen is not operated for a long time, but, owing to arrive the distance of user and display screen still in the scope of setting value by infrared detection, therefore make display backlight be in opening, avoided the user to appreciate in the process of video owing to palm PC cuts out the interruption that display backlight (or display screen) causes automatically according to the time span of setting, thereby realized ensureing that the user normally uses under the situation of display screen, control display screen (or display screen) backlight closes flexibly, reduces the power consumption of display device.
The embodiment of the invention also provides corresponding display device, and this display device comprises control shutting of display device backlight device, the structure of this device as shown in Figure 4, the specific implementation structure can comprise:
Infra-red ray transmitting unit 41 is used for when the backlight open of display device, the emission infrared signal;
Infrared ray receiving element 42 is used to receive the infrared signal that human body reflects;
Computing unit 43, the infrared signal of the human body that is used for receiving according to infrared ray receiving element 42 reflection calculates the distance of described display device and human body; For example, the mistiming according to the emission infrared signal during, calculate the distance of display screen and human body with the infrared signal that receives user's human body reflection;
Control module 44 is used for the result of calculation according to described computing unit 43, when the distance of human body and described display device exceeds range of set value, closes the backlight of described display device; When the distance of human body and described display device is in range of set value, keep the backlight open state of described display device.Be in the display screen state of not watching for the user when for example, the distance of setting display screen and human body is less than 10cm; The distance of setting display screen and human body is in the state of not watching display screen for the user during greater than 40cm; The distance of setting display screen and human body is in the state of watching display screen for the user more than or equal to 10cm during less than 40cm; According to above-mentioned setting value, can control the result of calculation of unit 43 according to infrared ray, close or keep the backlight of display screen.During concrete the application, control module 44 can also exceed range of set value in the distance of human body and described display device, and duration when exceeding schedule time length, closes the backlight of described display device, to adapt to the of short duration situation about frameing out of user.
Need to prove, though the embodiment of the invention has increased control shutting of display device backlight device on portable equipments such as mobile phone or palm PC, therefore but the power consumption of this device is far smaller than the power consumption backlight of mobile phone, increases the power consumption that still can reduce display device behind this device.Concrete, backlight with the mobile phone of 4 LEDs wicks is example: the backlight power consumption of mobile phone is 3V
*15mA
*4, i.e. 180mA; And the power consumption of control shutting of display device backlight device has only 3
*5mA, i.e. 15mA; Therefore the power consumption of controlling the shutting of display device backlight device has only 1/12 of backlight power consumption, though therefore when unlatching is backlight, increased the power consumption of control shutting of display device backlight device, but according to this device close backlight after, the energy of saving is far longer than the energy that this device consumes, and therefore still can reduce the power consumption of display device.
In the practical application, the device of above-mentioned control shutting of display device backlight can integrate with display device, and is arranged in the various portable equipments.
In sum, compare in various embodiments of the present invention and the prior art, owing to utilize the situation of infrared detection user's use display device, and control the backlight of display device according to this operating position and close, can realize closing automatically the backlight of display device, reduce the power consumption of display device.Therefore, the invention process can be controlled the backlight of display device and close flexibly ensureing that the user normally uses the situation of display device, reduces the power consumption of display device.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (4)
1, a kind of method of controlling shutting of display device backlight is characterized in that, comprising:
When the backlight open of display device, the equipment emission infrared signal under the described display device;
According to the infrared signal of human body reflection, calculate the distance of described display device and human body;
When the distance of human body and described display device exceeds range of set value, close the backlight of described display device.
2, method according to claim 1, it is characterized in that, described infrared signal according to the human body reflection, calculate the distance of described display device and human body, comprise: the mistiming according to described equipment emission infrared signal during, calculate the distance of described display device and human body with the infrared signal that receives the human body reflection.
3, method according to claim 1, it is characterized in that, described distance when human body and described display device exceeds range of set value, close the backlight of described display device, comprise: when the distance of human body and described display device exceeds range of set value, and the duration length that exceeds schedule time is then closed the backlight of described display device.
4, a kind of display device is characterized in that, comprises the device of controlling shutting of display device backlight, and described device comprises:
Infra-red ray transmitting unit is used for when the backlight open of display device, the emission infrared signal;
The infrared ray receiving element is used to receive the infrared signal that human body reflects;
Computing unit, the infrared signal that the human body that is used for receiving according to described infrared ray receiving element reflects, the distance of calculation display spare and human body;
Control module is used for the result of calculation according to described computing unit, when the distance of human body and described display device exceeds range of set value, closes the backlight of described display device.
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| CNA2009100797304A CN101515195A (en) | 2009-03-09 | 2009-03-09 | Method for controlling shutting of display device backlight and device thereof |
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| CNA2009100797304A CN101515195A (en) | 2009-03-09 | 2009-03-09 | Method for controlling shutting of display device backlight and device thereof |
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