CN103021319B - A kind of saving energy of screen display packing and device - Google Patents
A kind of saving energy of screen display packing and device Download PDFInfo
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- CN103021319B CN103021319B CN201210566083.1A CN201210566083A CN103021319B CN 103021319 B CN103021319 B CN 103021319B CN 201210566083 A CN201210566083 A CN 201210566083A CN 103021319 B CN103021319 B CN 103021319B
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Abstract
The present invention relates to field of screen display, be specifically related to a kind of saving energy of screen display packing and device.Described method comprises the steps: to gather surround lighting light intensity, and is carried out pre-service and be converted to digital signal; Judge that the surround lighting light intensity belonging to surround lighting light intensity is interval by digital signal; The surround lighting light intensity interval pre-set according to affiliated surround lighting light intensity interval query and the corresponding table of pulse-width signal, determine the pulse-width signal exported; The brightness being controlled screen by pulse-width signal is exported.The present invention is by corresponding with pulse-width signal for surround lighting light intensity, corresponding pulse-width signal is inquired about by gathering surround lighting light intensity, the brightness of screen is controlled by pulse-width signal, make screen difference environmentally automatically can carry out brightness regulation, decrease the waste of electric energy, but also avoid screen and be in high brightness state for a long time, extend the serviceable life of screen.
Description
Technical Field
The invention relates to the field of screen display, in particular to a screen energy-saving display method and device.
Background
The existing display screen is widely applied to various places, such as an outdoor advertisement screen, an indoor scheduling command display screen, a welcome display screen, a conference display screen and the like. However, the brightness of the surrounding environment varies depending on the application location of the screen, and the surrounding environment also varies with the day, night and weather, resulting in the brightness of the surrounding environment also varying. Under the condition that the ambient brightness is constantly changed, the screen keeps the same high brightness all the time, energy is not saved, the visual perception of a user is influenced, no people are in front of the display screen, the display screen still displays at the high brightness, electric energy is wasted, and the service life of the display screen is shortened.
Disclosure of Invention
The invention solves the technical problem of overcoming the defects of the prior art and provides the screen energy-saving display method which can intelligently adjust the screen brightness according to different ambient lights.
The invention also provides a screen energy-saving display device which can intelligently adjust the screen brightness according to different ambient lights.
The purpose of the invention is realized by the following technical scheme:
a screen energy-saving display method comprises the following steps:
collecting the light intensity of ambient light, and preprocessing the light intensity to convert the light intensity into a digital signal;
judging an ambient light intensity interval to which the ambient light intensity belongs through the digital signal;
inquiring a preset corresponding table of the ambient light intensity interval and the pulse width modulation signal according to the belonging ambient light intensity interval, and determining the output pulse width modulation signal;
the brightness output of the screen is controlled by the pulse width modulation signal.
A screen energy-saving display device comprises a screen, an optical sensing module, a light intensity interval judging module, a pulse width modulation signal inquiring module and a screen brightness control module which are connected in sequence, wherein the screen brightness control module is connected with the screen; wherein,
the optical sensing module is used for collecting the light intensity of the ambient light, preprocessing the light intensity and converting the light intensity into a digital signal and transmitting the digital signal to the light intensity interval judging module;
the light intensity interval judging module is used for judging the light intensity interval of the ambient light to which the light intensity of the ambient light belongs through the received digital signal and transmitting the light intensity interval to the pulse width modulation signal inquiring module;
the pulse width modulation signal query module is used for presetting a corresponding table of the light intensity interval of the ambient light and the pulse width modulation signal, querying the corresponding table of the light intensity interval of the ambient light and the pulse width modulation signal according to the light intensity interval of the ambient light, and determining the output pulse width modulation signal to be transmitted to the screen brightness control module;
and the screen brightness control module is used for controlling the brightness output of the screen according to the received pulse width modulation signal.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
the invention corresponds the light intensity of the ambient light with the pulse width modulation signal, inquires the corresponding pulse width modulation signal by collecting the light intensity of the ambient light, and controls the brightness of the screen by the pulse width modulation signal, so that the screen can automatically adjust the brightness according to different environments, the waste of electric energy is reduced, the screen is prevented from being in a high-brightness state for a long time, and the service life of the screen is prolonged.
Drawings
FIG. 1 is a flowchart of an embodiment 1 of a screen energy saving display method according to the present invention;
FIG. 2 is an exemplary diagram of a corresponding table of the light intensity interval of the ambient light and the PWM signal according to the present invention;
FIG. 3 is a flowchart of an embodiment 2 of a screen energy saving display method according to the present invention;
FIG. 4 is a schematic diagram of a structure of a screen using an infrared sensor as a detecting device according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a structure of a screen with an infrared sensor as a detecting device according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a structure of a detection device on a screen, which employs a camera according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of an embodiment 3 of a screen energy-saving display device according to the present invention;
fig. 8 is a schematic structural diagram of an energy-saving display device according to an embodiment 4 of the present invention.
Detailed Description
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Example 1
Referring to fig. 1, a flowchart of an embodiment of a screen energy saving display method according to the present invention is shown. As shown in fig. 1, the screen energy saving display method of the embodiment specifically includes the following steps:
step S101, collecting the light intensity of ambient light, and preprocessing the light intensity to convert the light intensity into a digital signal;
step S102, judging an ambient light intensity interval to which the ambient light intensity belongs through the digital signal; the light intensity intervals of the ambient light are preset, and each interval has a certain range and can be set according to practical application;
step S103, inquiring a preset corresponding table of the ambient light intensity interval and the pulse width modulation signal according to the belonging ambient light intensity interval, and determining the output pulse width modulation signal;
and step S104, controlling the brightness output of the screen through the pulse width modulation signal.
Therefore, according to the technical scheme in this embodiment, the ambient light intensity around the screen is collected and converted into a digital signal, the interval to which the ambient light intensity converted into the digital signal belongs is determined according to the preset ambient light intensity interval, the pulse width modulation signal corresponding to the interval to which the current ambient light intensity belongs is inquired according to the preset correspondence table between the ambient light intensity interval and the pulse width modulation signal, and finally the brightness output of the screen is controlled by using the inquired pulse width modulation signal, so that the brightness of the screen is intelligently adjusted according to the difference of the ambient light, the display that the screen keeps high brightness all the time is avoided, the waste of electric energy is reduced, and the service life of the screen is also prolonged. In this embodiment, the brightness is adjusted based on the corresponding relationship between the ambient light intensity and the pulse width modulation signal, and the screen brightness is directly adjusted according to the ambient light intensity, that is, the stronger the ambient light intensity is, the stronger the screen brightness is, and the weaker the ambient light is, the weaker the screen brightness is, which is a direct adjustment relationship, so that the screen brightness can directly respond according to the change of the ambient light intensity, which is direct and convenient, and the brightness adjustment is obvious.
In a specific implementation process, the light intensity of the ambient light collected in step S101 is original light intensity data, and in order to facilitate subsequent query of a corresponding pulse width modulation signal according to the collected light intensity of the ambient light, the pulse width modulation signal is first converted into a digital signal, which may specifically adopt the following implementation manner:
the collected light intensity of the ambient light is converted into a voltage signal, and the voltage signal is converted into a digital signal through AD conversion.
In a specific implementation process, the ambient light intensity interval in step S102 is preset, and the setting of the ambient light intensity interval may be implemented as follows:
taking the maximum ambient light intensity value as a reference, taking the ambient light intensity (whether the point increased is correct or not. If the maximum intensity value of the ambient light is 100cd, in order to set the intensity interval of the ambient light with 10 interval levels, the intensity values of the ambient light between 0 and 100cd are taken according to the interval of 10cd to obtain 0cd, 10cd, 20cd … 80cd, 90cd and 100cd, the series of intensity values of the ambient light are normalized by using the maximum intensity value of 100cd, for example, 10/100=0.1, and the normalization conversion of the intensity values of other ambient light is also analogized, so as to obtain a series of normalized values of 0, 0.1, 0.2 … 0.8, 0.9 and 1, and the series of normalized values are taken as interval endpoints to form 10 equal interval levels, which is 0 < I ≦ 0.1, as shown in fig. 2; i is more than 0.1 and less than or equal to 0.2; i is more than 0.2 and less than or equal to 0.3; i is more than 0.3 and less than or equal to 0.4; i is more than 0.4 and less than or equal to 0.5; i is more than 0.5 and less than or equal to 0.6; i is more than 0.6 and less than or equal to 0.7; i is more than 0.7 and less than or equal to 0.8; i is more than 0.8 and less than or equal to 0.9; i is more than 0.9 and less than or equal to 1.0. In this embodiment, for example, when the detected ambient light intensity value is normalized to 0.55, it falls within the range of ambient light intensity of 0.5 < I ≦ 0.6. The setting method of the light intensity interval of the ambient light is not limited to this, as long as the detected light intensity of the ambient light can be ensured to correspond to the light intensity interval of the ambient light and the brightness of the screen can be reasonably adjusted according to the corresponding light intensity interval of the ambient light, and the description is omitted here.
In the specific implementation process, the corresponding table of the light intensity interval of the ambient light and the pulse width modulation signal in step S103 is preset, and the light intensity interval of the ambient light in a certain range corresponds to a preset pulse width modulation signal. As long as the ambient light intensity that detects falls in the interval within range of certain preset ambient light intensity, then all correspond to same preset's pulse width modulation signal, when the ambient light takes place small change in the short time, frequent luminance conversion can not appear in the screen, avoids arousing the discomfort of viewer's eyes, has guaranteed user's use and has experienced. The higher the intensity interval level of the ambient light is, the larger the duty ratio of the pulse width modulation signal is, and the larger the screen brightness is. As shown in fig. 2, an ambient light intensity interval corresponds to a pwm signal, but the setting of the duty cycle of the pwm signal according to the present invention is not limited thereto. In this embodiment, the ambient light brightness is divided into the intervals, each interval corresponds to the pulse width modulation signal with different corresponding duty ratios, and the pulse width modulation signals are output in a table look-up manner, so that the energy-saving environment-friendly pulse width modulation signal has the advantages of being more energy-saving and more comfortable to watch in response to each ambient light segment.
Example 2
On the basis of embodiment 1, this embodiment also adjusts the screen brightness by taking whether a person is in front of the screen as an influence factor. Fig. 3 is a detailed flowchart of the present embodiment. The screen energy-saving display method of the embodiment specifically comprises the following steps:
step S201, collecting the light intensity of ambient light, and preprocessing the light intensity to convert the light intensity into a digital signal;
step S202, judging an ambient light intensity interval to which the ambient light intensity belongs through the digital signal; the light intensity intervals of the ambient light are preset, and each interval has a certain range and can be set according to practical application;
step S203, detecting whether a person is in front of the screen, if so, automatically moving the currently detected region of the ambient light intensity to a next-stage larger region of the ambient light intensity, and taking the larger region of the ambient light intensity as a final region of the ambient light intensity, otherwise, taking the currently detected region of the ambient light intensity as a final region of the ambient light intensity; when the detected person is in front of the screen and the original ambient light intensity interval corresponding to the detected ambient light intensity is the maximum, the ambient light intensity interval is kept unchanged, namely, the currently detected interval where the ambient light intensity is located is used as the final ambient light intensity interval;
step S204, inquiring a preset corresponding table of the ambient light intensity interval and the pulse width modulation signal according to the final ambient light intensity interval, and determining the output pulse width modulation signal;
step S205, controlling the brightness output of the screen by the pulse width modulation signal.
In the specific embodiment, whether a person passes in front of the screen or not is used as an influence factor to adjust the display brightness of the screen, whether the person passes in front of the screen or not is judged by direct detection, and the judgment result is directly reflected to the inquiry corresponding table to output the pulse width modulation signal, so that the method is direct and convenient. When no one is in front of the screen, the screen is prevented from being displayed at high brightness, energy is saved, the service life of the screen can be prolonged, when someone is in front of the screen, the screen is displayed at high brightness, the attention of people can be attracted, and the method is particularly important for the screen for advertisement.
In the specific implementation process, the specific implementation manner of steps S201, S202, S204, and S205 is substantially the same as that in embodiment 1, and is not described herein again.
In a specific implementation process, the detection of whether a person is in front of the screen in step S203 may be implemented by an infrared sensing detector or a camera or other detection devices. In this embodiment, an implementation manner of implementing a detection function by an infrared sensing detector or a camera is specifically described.
When the infrared sensing detector is used for detecting whether a person is in front of the screen, the infrared sensing detector can be arranged on the boundary of the screen, the infrared sensing detector detects infrared light emitted to the front of the screen to realize detection, when the infrared light is cut and blocked, the screen is judged that the person is in front of the screen, and if not, the screen is judged that no person is in front of the screen. When the infrared sensing detector detects that a person is in front of the screen, the currently detected region of the ambient light intensity is automatically moved to the next larger region of the ambient light intensity, and the larger region of the ambient light intensity is used as the final region of the ambient light intensity, otherwise, the currently detected region of the ambient light intensity is used as the final region of the ambient light intensity. When the infrared sensing detector detects that a person is in front of the screen and the originally detected ambient light intensity interval corresponding to the ambient light intensity is the maximum, the ambient light intensity interval is kept unchanged, namely, the currently detected interval where the ambient light intensity is located is used as the final ambient light intensity interval to inquire the corresponding pulse width modulation signal. The infrared ray emitted from the infrared sensing detector forms an infrared ray network or an infrared ray surface in front of the screen, as shown in fig. 4, the infrared sensing detector is provided with in-line infrared diodes a1 and a2, the infrared ray emitted from which forms an infrared ray surface in front of the screen, or as shown in fig. 5, the infrared sensing detector is provided with a row of ordinary infrared diodes A3, the infrared ray emitted from which forms an infrared ray network in front of the screen.
When adopting the camera to survey whether someone is in screen the place ahead, can set up the camera on the border or the corner of screen, the place ahead space of screen is covered to the shooting range of camera, and the camera is through taking the front and back image in screen the place ahead at different time quantums and carrying out the operation of making a difference and judging whether someone is in screen the place ahead. When detecting someone in the screen place ahead through the camera, move the bigger ambient light intensity interval of next stage with the ambient light intensity interval of present detection automatically to this bigger ambient light intensity interval is as final ambient light intensity interval, otherwise regard the interval of the ambient light intensity of present detection as final ambient light intensity interval. When the camera detects that a person is in front of the screen and the original ambient light intensity interval corresponding to the detected ambient light intensity is the maximum, the ambient light intensity interval is kept unchanged, namely, the currently detected ambient light intensity interval is used as the final ambient light intensity interval to inquire the corresponding pulse width modulation signal. As shown in fig. 6, the cameras B1 and B2 are placed at the corners of the screen, and the shooting ranges of the cameras B1 and B2 cover the space in front of the screen.
Example 3
According to the screen energy-saving display method of the invention, the invention also provides a screen energy-saving display device, and a specific example of the screen energy-saving display device of the invention is described in detail below. Fig. 7 is a schematic structural diagram of an embodiment of the screen energy-saving display device of the present invention, and the detailed description will be given for the embodiment.
A screen energy-saving display device comprises an optical sensing module 301, a light intensity interval judging module 302, a pulse width modulation signal inquiring module 303, a screen brightness control module 304 and a screen 305 which are connected in sequence; wherein,
the optical sensing module 301 is configured to collect light intensity of ambient light, preprocess the light intensity, convert the light intensity into a digital signal, and transmit the digital signal to the light intensity interval determination module 302;
a light intensity interval determination module 302, which presets an ambient light intensity interval and is used for determining the ambient light intensity interval to which the ambient light intensity belongs according to the received digital signal and transmitting the ambient light intensity interval to a pulse width modulation signal query module 303;
the pulse width modulation signal query module 303 is configured to preset a corresponding table of the ambient light intensity interval and the pulse width modulation signal, and is configured to query the corresponding table of the ambient light intensity interval and the pulse width modulation signal according to the ambient light intensity interval to which the pulse width modulation signal belongs, and determine that the output pulse width modulation signal is transmitted to the screen brightness control module 304;
and a screen brightness control module 304 for controlling the brightness output of the screen 305 according to the received pulse width modulation signal.
Accordingly, according to the technical solution in this embodiment, first, an ambient light intensity interval is preset in the light intensity interval determination module 302, and a corresponding table between the ambient light intensity interval and the pwm signal is preset in the pwm signal query module 303; the optical sensing module 301 is used for collecting the light intensity of the ambient light around the screen and converting the light intensity into a digital signal, the light intensity interval judging module 302 judges the interval to which the light intensity of the ambient light converted into the digital signal belongs, then the pulse width modulation signal inquiring module 303 inquires out the pulse width modulation signal corresponding to the interval to which the current light intensity of the ambient light belongs, and the screen brightness control module 304 controls the brightness output of the screen 305 according to the inquired pulse width modulation signal, so that the intelligent regulation of the screen brightness according to different ambient lights is realized, the display that the screen keeps high brightness all the time is avoided, the waste of electric energy is reduced, and the service life of the screen is prolonged.
In a specific implementation process, the optical sensing module 301 may pre-process the collected light intensity of the ambient light through the AD conversion module, and after the light sensing module 301 converts the collected light intensity of the ambient light into a voltage signal, the AD conversion module is used to convert the voltage signal into a digital signal. The AD conversion module may be built in the optical sensing module 301, or may be connected to the optical sensing module 301 independently of the optical sensing module 301 to implement AD conversion of the light intensity of the ambient light. When the AD conversion module is independent of the optical sensing module 301, the optical sensing module 301 may be implemented using a photo resistor.
In a specific implementation process, the setting of the light intensity interval of the ambient light by the light intensity interval determination module 302 can be implemented as follows:
taking the maximum ambient light intensity value as a reference, taking the ambient light intensity at certain intervals, carrying out normalization processing to obtain corresponding normalized values, and taking the normalized values as interval endpoints to form a plurality of equal interval grades as preset ambient light intensity intervals. If the maximum intensity value of the ambient light is 100cd, in order to set the intensity interval of the ambient light with 10 interval levels, the intensity values of the ambient light between 0 and 100cd are taken according to the interval of 10cd to obtain 0cd, 10cd, 20cd … 80cd, 90cd and 100cd, the series of intensity values of the ambient light are normalized by using the maximum intensity value of 100cd, for example, 10/100=0.1, and the normalization conversion of the intensity values of other ambient light is also analogized, so as to obtain a series of normalized values of 0, 0.1, 0.2 … 0.8, 0.9 and 1, and the series of normalized values are taken as interval endpoints to form 10 equal interval levels, which is 0 < I ≦ 0.1, as shown in fig. 2; i is more than 0.1 and less than or equal to 0.2; i is more than 0.2 and less than or equal to 0.3; i is more than 0.3 and less than or equal to 0.4; i is more than 0.4 and less than or equal to 0.5; i is more than 0.5 and less than or equal to 0.6; i is more than 0.6 and less than or equal to 0.7; i is more than 0.7 and less than or equal to 0.8; i is more than 0.8 and less than or equal to 0.9; i is more than 0.9 and less than or equal to 1.0. In this embodiment, for example, when the detected ambient light intensity value is normalized to 0.55, it falls within the range of ambient light intensity of 0.5 < I ≦ 0.6. The setting method of the light intensity interval of the ambient light is not limited to this, as long as the detected light intensity of the ambient light can be ensured to correspond to the light intensity interval of the ambient light and the brightness of the screen can be reasonably adjusted according to the corresponding light intensity interval of the ambient light, and the description is omitted here.
In a specific implementation process, the correspondence table between the light intensity interval of the ambient light and the pulse width modulation signal in the pulse width modulation signal query module 303 is that one light intensity interval of the ambient light corresponds to one preset pulse width modulation signal, wherein the higher the level of the light intensity interval of the ambient light is, the larger the duty ratio of the pulse width modulation signal is. The light intensity interval of the ambient light in a certain range corresponds to a preset pulse width modulation signal. As long as the detected ambient light intensity falls within a certain preset ambient light intensity interval range, the detected ambient light intensity is corresponding to the same preset pulse width modulation signal, when the ambient light slightly changes in a short time, frequent brightness conversion cannot occur on the screen 305, discomfort of eyes of a viewer is avoided, and the use experience of a user is guaranteed. The higher the intensity interval level of the ambient light is, the larger the duty ratio of the pulse width modulation signal is, and the larger the screen brightness is. As shown in fig. 2, an ambient light intensity interval corresponds to a pwm signal, but the setting of the duty cycle of the pwm signal according to the present invention is not limited thereto. In this embodiment, the pwm signal query module 303 divides the ambient light brightness into different regions, and each region corresponds to the corresponding pwm signal with different duty ratios and is output in a table lookup manner, which has the advantages of saving more energy and being more comfortable for each ambient light segment.
Example 4
On the basis of embodiment 3, the present embodiment further provides a detection device to detect whether there is a person in front of the screen, and further adjusts the brightness of the screen according to whether there is a person in front of the screen. Fig. 8 is a schematic structural diagram of the present embodiment. The screen energy-saving display device of the embodiment comprises: the device comprises an optical sensing module 301, a light intensity interval judging module 302, a pulse width modulation signal inquiring module 303, a screen brightness control module 304 and a screen 305 which are sequentially connected, and further comprises a detection device 306, wherein the detection device 306 is connected with the pulse width modulation signal inquiring module 303.
The optical sensing module 301, the light intensity interval determining module 302, the pulse width modulation signal querying module 303, the screen brightness control module 304, and the screen 305 are implemented in substantially the same manner as in embodiment 1, and are not described herein again.
The detecting device 306 is used for detecting whether a person is in front of the screen, and if so, the pulse width modulation signal querying module 304 is notified to automatically move the currently detected region of the ambient light intensity to a next larger region of the ambient light intensity to query the corresponding pulse width modulation signal, otherwise, the operation of notifying the pulse width modulation signal querying module is not executed. When the detecting device 306 detects that a person is in front of the screen and the originally detected ambient light intensity interval corresponding to the ambient light intensity is the maximum, the pwm signal querying module 304 keeps the ambient light intensity interval unchanged, that is, queries the corresponding pwm signal by using the currently detected ambient light intensity interval.
The invention directly detects whether a person is in front of the screen through the detection device 306, and directly reflects the judgment result to the pulse width modulation signal query module 303, and the pulse width modulation signal query module 303 adjusts the interval corresponding to the current ambient light intensity according to the judgment result of the detection device 306, so that the queried pulse width modulation signal is adjusted to be output, and the method is direct and convenient. When no one is in front of the screen, the screen is prevented from being displayed at high brightness, energy is saved, the service life of the screen can be prolonged, when someone is in front of the screen, the screen is displayed at high brightness, the attention of people can be attracted, and the method is particularly important for the screen for advertisement.
In the course of a specific embodiment, the detection device 306 may be implemented by an infrared sensing detector or a camera.
When an infrared sensing detector is adopted and arranged on the boundary of the screen, the infrared sensing detector judges that a person is in front of the screen when detecting that infrared light emitted to the front of the screen is cut and blocked, and otherwise, the infrared sensing detector judges that no person is in front of the screen; when the infrared sensing detector detects that a person is in front of the screen, the pulse width modulation signal query module 304 is notified to automatically move the currently detected region of the ambient light intensity to a next larger region of the ambient light intensity to query the corresponding pulse width modulation signal, otherwise, the operation of notifying the pulse width modulation signal query module 304 is not executed, and the pulse width modulation signal query module 304 queries the corresponding pulse width modulation signal from the currently detected region of the ambient light intensity. When the infrared sensing detector detects that a person is in front of the screen and the originally detected ambient light intensity interval corresponding to the ambient light intensity is the maximum, the pulse width modulation signal query module 304 keeps the ambient light intensity interval unchanged, that is, the currently detected ambient light intensity interval is used for querying the corresponding pulse width modulation signal. The infrared sensing detector may be implemented by a line-shaped infrared diode or a general infrared diode, as shown in fig. 4, the infrared sensing detector is provided with line-shaped infrared diodes a1 and a2, infrared rays emitted therefrom form an infrared ray plane in front of the screen, or as shown in fig. 5, the infrared sensing detector is provided with a row of general infrared diodes A3, infrared rays emitted therefrom form an infrared ray network in front of the screen.
When a camera is used as the detecting device 306, the camera is disposed on the border or corner of the screen, and it determines whether a person is in front of the screen by taking front and rear images in front of the screen at different time periods to perform a difference operation. When the camera detects that a person is in front of the screen, the camera informs the pulse width modulation signal query module 304 to automatically move the currently detected region of the ambient light intensity to a region of the next larger ambient light intensity to query the corresponding pulse width modulation signal, otherwise, the operation of informing the pulse width modulation signal query module 304 is not executed, and the pulse width modulation signal query module 304 queries the corresponding pulse width modulation signal from the region of the currently detected ambient light intensity. When the camera detects that a person is in front of the screen and the originally detected ambient light intensity interval corresponding to the ambient light intensity is the maximum, the pulse width modulation signal query module 304 keeps the ambient light intensity interval unchanged, that is, the currently detected ambient light intensity interval is used for querying the corresponding pulse width modulation signal. Wherein the photographing range of the cameras covers the space in front of the screen, as shown in fig. 6, the cameras B1 and B2 are placed at the corners of the screen, and the photographing ranges of the cameras B1 and B2 cover the space in front of the screen.
The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (8)
1. A screen energy-saving display method is characterized by comprising the following steps:
collecting the light intensity of ambient light, and preprocessing the light intensity to convert the light intensity into a digital signal;
judging an ambient light intensity interval to which the ambient light intensity belongs through the digital signal;
inquiring a preset corresponding table of the ambient light intensity interval and the pulse width modulation signal according to the belonging ambient light intensity interval, and determining the output pulse width modulation signal;
controlling the brightness output of the screen through a pulse width modulation signal;
after the environment light intensity interval to which the environment light intensity belongs is judged through the digital signal, the following steps are also carried out: and detecting whether a person is in front of the screen, if so, automatically moving the currently detected region of the ambient light intensity to a next-stage larger region of the ambient light intensity, and inquiring the corresponding pulse width modulation signal according to the larger region of the ambient light intensity, otherwise, inquiring the corresponding pulse width modulation signal according to the currently detected region of the ambient light intensity.
2. The screen energy-saving display method of claim 1, wherein the ambient light intensity interval is preset in the following manner:
taking the maximum ambient light intensity value as a reference, taking the ambient light intensity at certain intervals, carrying out normalization processing to obtain corresponding normalized values, and taking the normalized values as interval endpoints to form a plurality of equal interval levels.
3. The screen energy-saving display method according to claim 1, wherein the preset correspondence table of the light intensity interval of the ambient light and the pulse width modulation signal is a correspondence table of a light intensity interval of the ambient light with a preset pulse width modulation signal, wherein the higher the level of the light intensity interval of the ambient light is, the larger the duty ratio of the pulse width modulation signal is.
4. The screen energy-saving display method according to any one of claims 1 to 3, wherein whether a person is in front of the screen is detected by an infrared sensing detector disposed on a boundary of the screen, and it is determined that a person is in front of the screen when the infrared sensing detector detects that infrared light directed to the front of the screen is cut and blocked, and it is determined that no person is in front of the screen otherwise;
or,
whether someone is in screen the place ahead is surveyed through the camera of placing in on screen border or corner, the camera is through taking the front and back image in screen the place ahead at different time quantums and making the difference operation and judging whether someone is in screen the place ahead.
5. A screen energy-saving display device comprises a screen and is characterized by further comprising an optical sensing module, a light intensity interval judging module, a pulse width modulation signal inquiring module and a screen brightness control module which are sequentially connected, wherein the screen brightness control module is connected with the screen; wherein,
the optical sensing module is used for collecting the light intensity of the ambient light, preprocessing the light intensity and converting the light intensity into a digital signal and transmitting the digital signal to the light intensity interval judging module;
the light intensity interval judging module is used for judging the light intensity interval of the ambient light to which the light intensity of the ambient light belongs through the received digital signal and transmitting the light intensity interval to the pulse width modulation signal inquiring module;
the pulse width modulation signal query module is used for presetting a corresponding table of the light intensity interval of the ambient light and the pulse width modulation signal, querying the corresponding table of the light intensity interval of the ambient light and the pulse width modulation signal according to the light intensity interval of the ambient light, and determining the output pulse width modulation signal to be transmitted to the screen brightness control module;
the screen brightness control module is used for controlling the brightness output of the screen according to the received pulse width modulation signal;
the device comprises a pulse width modulation signal inquiry module, a detection device arranged on a screen, wherein the detection device is connected with the pulse width modulation signal inquiry module and used for detecting whether a person is in front of the screen or not, if so, the pulse width modulation signal inquiry module is informed to automatically move the current detected ambient light intensity interval to a next higher ambient light intensity interval to inquire the corresponding pulse width modulation signal, otherwise, the operation of informing the pulse width modulation signal inquiry module is not executed.
6. The screen energy-saving display device of claim 5, wherein the light intensity interval determination module takes the maximum ambient light intensity value as a reference, obtains the corresponding normalized value by normalizing the ambient light intensity at certain intervals, and forms a plurality of equal interval levels as the preset ambient light intensity intervals by taking the normalized value as the interval endpoint.
7. The screen energy-saving display device of claim 5, wherein the correspondence table between the intensity interval of the ambient light and the pulse width modulation signal in the pulse width modulation signal query module is a correspondence table between the intensity interval of the ambient light and a preset pulse width modulation signal, wherein the higher the level of the intensity interval of the ambient light, the larger the duty ratio of the pulse width modulation signal.
8. The screen energy-saving display device of claim 5, wherein the detecting device is an infrared sensing detector arranged on the boundary of the screen, and is used for judging that a person is in front of the screen when detecting that infrared light rays emitted to the front of the screen are cut and blocked, and otherwise, judging that no person is in front of the screen;
or,
the detection device is a camera arranged on the boundary or the corner of the screen, and the detection device is used for shooting front and back images in front of the screen at different time periods to perform difference operation to judge whether a person is in front of the screen.
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| CN103730086A (en) * | 2013-12-13 | 2014-04-16 | 乐视致新电子科技（天津）有限公司 | Method and device for adjusting backlight value |
| CN105139230A (en) * | 2015-08-26 | 2015-12-09 | 成都秋雷科技有限责任公司 | Automatic dimming advertising system |
| CN105374339A (en) * | 2015-11-19 | 2016-03-02 | 广东小天才科技有限公司 | Method and system for automatically adjusting brightness of display screen by intelligent terminal |
| CN108281103A (en) * | 2017-01-06 | 2018-07-13 | 昆山国显光电有限公司 | Show the brightness control method and device of equipment |
| CN106804087B (en) * | 2017-02-28 | 2019-08-13 | 惠州华阳通用电子有限公司 | A kind of automatic light modulating method of inter-vehicle information system |
| CN107093416B (en) * | 2017-06-08 | 2020-02-21 | 青岛海信电器股份有限公司 | Screen backlight brightness adjusting method and device based on light sensor and terminal |
| CN108877738A (en) * | 2018-06-20 | 2018-11-23 | 广东美的环境电器制造有限公司 | Display panel luminance control method and circuit, heater |
| CN110992901B (en) * | 2019-12-24 | 2022-04-12 | 太原航空仪表有限公司 | Backlight brightness control algorithm |
| CN113329550A (en) * | 2020-02-28 | 2021-08-31 | 漳州立达信光电子科技有限公司 | Method and device for controlling illumination of real-time environment of lamp, terminal equipment and medium |
| CN113421531B (en) * | 2021-06-28 | 2022-09-27 | 深圳市华星光电半导体显示技术有限公司 | Backlight brightness adjusting circuit and electronic device |
| CN114420056A (en) * | 2021-12-25 | 2022-04-29 | 深圳市龙祥卓越电子科技有限公司 | Industrial display supporting automatic light sensing and adjusting backlight brightness and driving method |
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