CN109920358B - Method for controlling power consumption of display panel - Google Patents
Method for controlling power consumption of display panel Download PDFInfo
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- CN109920358B CN109920358B CN201910231975.8A CN201910231975A CN109920358B CN 109920358 B CN109920358 B CN 109920358B CN 201910231975 A CN201910231975 A CN 201910231975A CN 109920358 B CN109920358 B CN 109920358B
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Abstract
The present disclosure provides a method for controlling power consumption of a display panel, comprising the steps of: acquiring the intensity of ambient light, then detecting the intensity of the ambient light by an inductor and mapping to generate a corresponding threshold gray scale, and turning off all or part of gray scale voltage of pixels in the display panel, which are lower than the threshold gray scale, or adjusting the gray scale voltage of the pixels in the display panel to be not greater than the threshold gray scale voltage. The display effect of the display panel is improved, and meanwhile, the power consumption of the display panel is reduced.
Description
Technical Field
The disclosure relates to the field of display technologies, and in particular, to a method for controlling power consumption of a display panel.
Background
In order to reduce the overall power consumption of the lcd and improve the contrast ratio, the backlight adjustment control technique has been applied to the lcd field.
The backlight brightness is adjusted according to the intensity of the ambient light. In the prior art, the brightness of the display screen is improved by combining the backlight brightness improvement with the data curve adjustment, but the overall brightness of the same frame of picture on the display screen is reduced by the adjustment mode, the viewing experience of the picture is affected, and an ideal adjustment effect cannot be achieved. With the development of Organic Light-Emitting Diode (OLED) technology, which is a self-luminous device, although the OLED display device can improve outdoor visibility through a polarizer, the OLED display device reduces the brightness of a screen and increases the manufacturing cost, and also increases the current of the OLED device, increases the load of a panel, and reduces the service life of the OLED.
In summary, in the conventional backlight adjusting technology, after the adjustment control of the display panel is completed, although the display effect of the display screen is better, the display power consumption of the display panel is higher, and the service life of the display panel is reduced.
Disclosure of Invention
The disclosure provides a method for controlling power consumption of a display panel, which is used for solving the problem that the display panel has higher power consumption in an outdoor mode in the prior art.
To solve the above technical problem, the technical solution provided by the embodiment of the present disclosure is as follows:
according to a first aspect of the embodiments of the present disclosure, there is provided a method for controlling power consumption of a display panel, including the steps of:
s100: acquiring the intensity of ambient light;
s101: detecting the intensity of the ambient light through a sensor and mapping to generate a corresponding threshold gray scale;
s102: when the display panel works, all or part of gray scale voltages of pixels in the display panel, which are lower than the threshold gray scale, are turned off, or the gray scale voltages of the pixels in the display panel are adjusted to be not more than the threshold gray scale voltage.
According to an embodiment of the present disclosure, the sensor includes a detecting unit and a photoelectric sensing unit, the detecting unit detects the intensity of the ambient light, and the photoelectric sensing unit feeds back the intensity of the ambient light to the system end of the display panel.
According to an embodiment of the present disclosure, the step S101 further includes the steps of:
s200: and after the intensity of the ambient light is detected by the sensor, mapping the intensity of the ambient light into the threshold gray scale according to a corresponding mapping relation.
According to an embodiment of the present disclosure, the mapping relationship is a mapping curve, and the mapping curve is composed of the intensity value of the ambient light and the gray scale of the pixel.
According to an embodiment of the present disclosure, the mapping relationship is a mapping table obtained by calculating the intensity of the ambient light acquired by the display panel and the intensity of the ambient light acquired by the human eye.
According to an embodiment of the present disclosure, the sensor is a photoelectric converter that converts the ambient light of different intensities into corresponding voltage signals.
According to an embodiment of the present disclosure, the pixel comprises all sub-pixels in the display panel.
According to an embodiment of the present disclosure, the pixel is a low gray-scale pixel, and the pixel comprises a red sub-pixel, a green sub-pixel, a blue sub-pixel or a white sub-pixel.
According to an embodiment of the present disclosure, the display panel is an organic light emitting diode display panel or a light emitting diode display panel.
According to an embodiment of the present disclosure, the display panel is a touch panel.
In summary, the beneficial effects of the embodiment of the present disclosure are:
the invention provides a method for controlling power consumption of a display panel, wherein the display panel obtains the intensity of ambient light, maps the intensity of the light according to a mapping relation to generate a corresponding threshold gray scale, and finally, a system correspondingly adjusts the gray scale voltage of pixels in the display panel according to the generated threshold gray scale so as to reduce the power consumption of the display panel and further improve the service life of the display panel.
Drawings
In order to illustrate the embodiments or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some of the disclosed embodiments, and that other drawings can be obtained by those skilled in the art without inventive effort.
FIG. 1 is a display image of an indoor environment;
FIG. 2 is a display image of an outdoor environment;
FIG. 3 is a flow chart illustrating power consumption control of a display panel according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of a display panel according to an embodiment of the present disclosure;
FIG. 5 is a graph illustrating the input and output of the light intensity of the display image in an indoor environment according to an embodiment of the present disclosure;
FIG. 6 is a graph illustrating the light intensity input and output curves of the display image under outdoor conditions according to an embodiment of the present disclosure; and
FIG. 7 is a diagram illustrating the front and rear display effects of picture adjustment according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. It is to be understood that the described embodiments are merely illustrative of some, but not all embodiments of the disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any inventive step, are intended to be within the scope of the present disclosure.
In the outdoors, especially in sunlight, because the brightness of light is strong, when a user uses a mobile phone, the display effect of a screen is weakened, so that some details in an image are lost, the display effect is poor, and the display brightness felt by the user is generally the brightness displayed by the superposition of the brightness of an external light source and the brightness of a display screen. For a general display screen, in order to reduce the influence of the external strong light on the display screen, the backlight brightness of the display screen is often increased, and the display effect of the screen is improved by combining the mode of adjusting the brightness data curve.
As shown in fig. 1, fig. 1 is a display image of an indoor environment; fig. 2 is a display image of an outdoor environment. In fig. 1, in an image obtained in an indoor environment, the display effect of an object in the image is good, details of the object in each area can be clearly displayed, and when the image is in an outdoor strong light environment, the definition of the obtained image is obviously reduced, and meanwhile, a picture is also darkened. Objects in the display area 200 become blurred, the detail content is lost, and the display effect is poor.
Meanwhile, in the outdoor mode, the higher the backlight brightness of the display screen is, the higher the power consumption of the panel is, so that the burden of the panel is increased, and the service life of the panel is reduced.
In an embodiment of the present disclosure, a method for controlling power consumption of a display panel is provided. As shown in fig. 3, fig. 3 is a schematic flow chart illustrating power consumption control of a display panel according to an embodiment of the disclosure. FIG. 4 is a diagram of a display panel according to an embodiment of the disclosure. Referring to fig. 1 and 4, a method of controlling power consumption of a display panel according to an embodiment of the present disclosure includes:
step S100: the intensity of the ambient light is acquired.
In step S100, when the display panel 10 is in the outdoor mode, the brightness of the light is high, and in order to adapt to the strong light, the intensity of the actual light currently operating is first obtained.
Step S101: the intensity of the ambient light is detected by sensor 12 and mapped to produce a corresponding threshold gray scale value.
The step S101 further includes a step S200: after the intensity of light under the working condition is acquired through the display panel, the intensity is detected by the sensor 12 therein. Meanwhile, the sensor 12 performs mapping according to the intensity value of the light to obtain a threshold gray scale value of the light under the intensity.
The sensor 12 mainly includes a brightness detection unit and a photoelectric sensing unit. The brightness detection unit mainly detects the intensity of the ambient light obtained by the display panel 10 and judges the intensity value of the light; the photo sensor unit mainly feeds back the acquired light signal and the intensity of the light to the system end of the display panel 10. And processing the optical signal by a subsequent system end.
In the system of the display panel 10, the sensor 12 is a photoelectric converter, and the photoelectric converter converts the ambient light with different intensities acquired by the display panel 10 into corresponding voltage signals and transmits the voltage signals.
Specifically, when mapping the light intensity, the mapping is performed according to a set mapping curve relationship. The mapping curve is a preset mapping curve, and is formed by the intensity value of the ambient light and the gray scale value of the picture pixel in the display panel 10, and each intensity of the ambient light corresponds to the gray scale value of one pixel.
Meanwhile, the mapping relationship can also be a mapping table. There is also a one-to-one correspondence in the mapping table. The mapping table is obtained by calculating the intensity value of light obtained by the display panel 10 and the intensity value of light obtained by the human eye according to a correspondence relationship.
Step S102: when the display panel 10 works, all or part of the gray scale voltages of the pixels in the display panel 10 lower than the threshold gray scale are turned off, or the gray scale voltages of the pixels in the display panel 10 are adjusted to be not more than the threshold gray scale voltage.
In the present disclosure, as shown in fig. 5 and fig. 6, fig. 5 is a light intensity input/output curve of a display image in an indoor environment in the present disclosure, and fig. 6 is a light intensity input/output curve of a display image in an outdoor environment in the present disclosure. In fig. 5 and 6, the axis of abscissa represents the light intensity input value, and the axis of ordinate represents the light intensity output value. In fig. 5, a curve 400 is a light intensity curve perceived by human eyes in an indoor environment, a curve 401 is a light intensity curve obtained by a display panel in the indoor environment, and in fig. 6, a curve 500 is a light intensity curve perceived by human eyes in an outdoor environment; in an indoor environment, the intensity of ambient light is low, and therefore the difference between the curve 400 and the curve 401 is small, and an image picture viewed by human eyes on an image is not much different from an image picture in the display panel.
When the display panel works in an outdoor environment, the light intensity value is larger. In the embodiment of the present disclosure, the threshold gray level of the light in the outdoor environment is obtained in step S100 and step S101, and the picture is readjusted based on the threshold gray level value. As shown in fig. 6, the point a on the ordinate axis is a set threshold gray scale value. In the prior art, the starting points of the curve 500 are all at the coordinate origin, and in the present disclosure, the starting points of the curve 500 are located at the point a by setting the threshold gray scale. Thus, according to the light intensity adjustment curve in fig. 6, the image with pixels below the threshold gray level a in the display panel can be better adjusted.
When the display panel works in an outdoor mode, the brightness of the outdoor environment light detected by the system is set to be 100000nits, and then the threshold gray-scale value corresponding to the brightness light is found to be G10 through the mapping relation. When the gray scale value corresponding to the intensity of the light is below G10, human eyes cannot distinguish the brightness difference. Specifically, for example, the luminance value of G10 is 30nits, and the average value of gray levels below the threshold gray level voltage is 16nits, and the threshold gray level corresponding to the average value is between G6 and G5.
In the embodiment of the disclosure, the power consumption of the display panel can be minimized while the optimal display effect can be satisfied. In order to meet the above requirements, when the display panel is specifically adjusted, the gray scales of some pixels need to be turned off, that is, the gray scales with brightness differences that cannot be distinguished by human eyes are turned off, and the display effect of the picture is not affected.
Therefore, the system can turn off the gray scale voltages of the pixels with gray scales G1, G2, G3. G8 and G9 in the display screen. That is, all the gray levels of G1, G2, G3 · G8, and G9 are output as G0, and the pixel voltages of these gray levels are all turned off.
Alternatively, the system turns off only the voltages of the portions of gray scale pixels below the threshold gray scale G10, such as G1, G3, G5, G7, G9, or other portions of gray scale voltages, to save power consumption of the display panel.
Alternatively, if the gray levels not greater than the threshold gray level G10 are further adjusted so that the average value of the gray levels not greater than G10 is G5, all the other gray levels are output at the time of output at the gray level not greater than G5, such as G4, G3, G2, or G1; or a combination thereof such as G1 and G3, G2 and G4 or other combinations. The gray scale below G10 can be adjusted, so that the display power consumption of the display panel is reduced after the adjustment is finished.
As shown in fig. 7, fig. 7 is a schematic diagram of the front and rear display effects of the picture adjustment according to the embodiment of the disclosure. Fig. 7 a is a schematic diagram of an original image acquired by the display panel, and fig. 7 b is a schematic diagram of a picture displayed after the adjustment of the adjustment output curve of fig. 6 according to the embodiment of the disclosure. The area 600 is a pixel gray level having a gray level below the threshold gray level G10. After the adjustment is completed, the area 600 in fig. b still well retains the details in the picture, and simultaneously achieves the purpose of reducing the power consumption of the display panel.
In the adjusted pixels, the pixels are low gray scale pixels, and the pixels include red, green, blue or white sub-pixels. Or the pixel may be all sub-pixels in the display panel. Meanwhile, the display panel is an organic light emitting diode display panel or a light emitting diode display panel or the display panel is a touch panel. The method of controlling power consumption of the display panel provided in the embodiments of the present disclosure can be used.
The method for controlling the power consumption of the display panel provided by the embodiment of the present disclosure is described in detail above, and the description of the embodiment is only used to help understanding the technical solution and the core idea of the present disclosure; those of ordinary skill in the art will understand that: it is to be understood that modifications may be made to the arrangements described in the embodiments above, and such modifications or alterations may be made without departing from the spirit of the respective arrangements of the embodiments of the present disclosure.
Claims (10)
1. A method for controlling power consumption of a display panel is characterized by comprising the following steps:
s100: when the display panel is in an outdoor mode, acquiring the intensity of ambient light;
s101: detecting the intensity of the ambient light through a sensor and mapping to generate a corresponding threshold gray scale;
s102: when the display panel works in an outdoor environment, the gray scale voltage of all or part of pixels in the display panel, which are lower than the threshold gray scale, is turned off, or the gray scale voltage of the pixels in the display panel is adjusted to be not more than the threshold gray scale voltage;
wherein the threshold gray scale is a critical point at which human eyes can distinguish brightness difference.
2. The method as claimed in claim 1, wherein the sensor comprises a detection unit and a photo-electric sensing unit, the detection unit detects the intensity of the ambient light, and the photo-electric sensing unit feeds back the intensity of the ambient light to a system side of the display panel.
3. The method for controlling power consumption of a display panel according to claim 1, wherein the step S101 further comprises the steps of:
s200: and after the intensity of the ambient light is detected by the sensor, mapping the intensity of the ambient light into the threshold gray scale according to a corresponding mapping relation.
4. The method of claim 3, wherein the mapping relationship is a mapping curve, and the mapping curve is composed of the intensity value of the ambient light and the gray scale of the pixel.
5. The method for controlling power consumption of a display panel according to claim 3, wherein the mapping relationship is a mapping table obtained by calculating an intensity of the ambient light obtained by the display panel and an intensity of the ambient light obtained by human eyes.
6. The method of claim 1, wherein the sensor is a photoelectric converter that converts the ambient light of different intensities into corresponding voltage signals.
7. The method of display panel power consumption control of claim 1, wherein the pixel comprises all subpixels in the display panel.
8. The method of claim 1, wherein the pixel is a low gray-scale pixel, and the pixel comprises a red sub-pixel, a green sub-pixel, a blue sub-pixel, or a white sub-pixel.
9. The method for power consumption control of a display panel according to claim 1, wherein the display panel is an organic light emitting diode display panel or a light emitting diode display panel.
10. The method for controlling power consumption of a display panel according to claim 1, wherein the display panel is a touch panel.
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| JP2001142409A (en) * | 1999-11-12 | 2001-05-25 | Sony Corp | Video display device and illumination control method in the video display device |
| CN1652660A (en) * | 2003-11-11 | 2005-08-10 | 三星电子株式会社 | Power conservation for a display apparatus |
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| TWI423198B (en) * | 2011-04-20 | 2014-01-11 | Wistron Corp | Display apparatus and method for adjusting gray-level of screen image depending on environment illumination |
| CN108877739B (en) * | 2013-11-20 | 2020-11-06 | 华为终端有限公司 | Method and device for adjusting backlight brightness and electronic equipment |
| CN103984136B (en) * | 2014-05-06 | 2017-05-17 | 深圳市华星光电技术有限公司 | Liquid crystal display (LCD) panel and LCD device |
| TWI549106B (en) * | 2014-09-30 | 2016-09-11 | 宏碁股份有限公司 | Image display method and electronic device |
| CN104700786B (en) * | 2014-12-26 | 2017-12-19 | 小米科技有限责任公司 | Display brightness method of adjustment and device |
| CN106128371B (en) * | 2016-09-08 | 2019-01-25 | 京东方科技集团股份有限公司 | A kind of device of picture brightness enhancing, display device and method |
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| JP2001142409A (en) * | 1999-11-12 | 2001-05-25 | Sony Corp | Video display device and illumination control method in the video display device |
| CN1652660A (en) * | 2003-11-11 | 2005-08-10 | 三星电子株式会社 | Power conservation for a display apparatus |
| CN101689350A (en) * | 2007-07-04 | 2010-03-31 | 皇家飞利浦电子股份有限公司 | The method and system that is used for the backlight of driving display |
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