CN108538265B - Display brightness adjusting method and device of liquid crystal display screen - Google Patents
Display brightness adjusting method and device of liquid crystal display screen Download PDFInfo
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- CN108538265B CN108538265B CN201810322389.XA CN201810322389A CN108538265B CN 108538265 B CN108538265 B CN 108538265B CN 201810322389 A CN201810322389 A CN 201810322389A CN 108538265 B CN108538265 B CN 108538265B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
- G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
Abstract
The invention discloses a method and a device for adjusting display brightness of a liquid crystal display screen, which are used for improving the display effect of a mobile terminal display screen under the condition of environmental light intensity change. The method comprises the following steps: the mobile terminal acquires the change information of the ambient light brightness; the mobile terminal determines that the change information of the ambient light brightness is that the brightness increase exceeds a first threshold value in unit time, and selects a characteristic curve from a preset characteristic curve set according to the change information of the ambient light brightness, wherein the characteristic curve is obtained by increasing the offset in the brightness direction on the basis of a normalized gamma curve, and the offset in the brightness direction is gradually reduced along with the increase of the gray value; and the mobile terminal adjusts the brightness displayed by the display screen by adopting the selected characteristic curve.
Description
The present application is a divisional application of chinese patent application 201610203580.3 entitled "method and apparatus for adjusting display brightness of a liquid crystal display" filed on 31/3/2016.
Technical Field
The invention relates to the technical field of communication, in particular to a method and a device for adjusting display brightness of a liquid crystal display screen.
Background
With the widespread application of intelligent terminals, display screens become a reuse way for information exchange between users and intelligent terminals.
An outdoor strong light environment is a special application scene of the mobile terminal. Under outdoor highlight environment, ambient light reinforcing because display screen reflection reinforcing, the condition that can appear not seeing clearly the display screen often, for example, under scenes such as tourism is taken a picture or outdoor dialing, the user need shelter from the sunshine on the display screen just can see clearly the demonstration information of display screen.
At present, when the environment light intensity is changed from indoor to indoor, the display information of a display screen of the mobile terminal cannot be seen clearly by human eyes due to the change of the environment light intensity from weak to strong; when the environment light intensity changes from strong to weak from outdoor to indoor, human eyes adapt slowly, and the display brightness of the display screen of the mobile terminal causes discomfort to the human eyes.
Therefore, under the condition of changing the ambient light intensity, the display effect of the display screen of the mobile terminal is poor.
Disclosure of Invention
The embodiment of the invention provides a method and a device for adjusting display brightness of a liquid crystal display screen, which are used for improving the display effect of a mobile terminal display screen under the condition of environmental light intensity change.
The embodiment of the invention provides the following specific technical scheme:
the embodiment of the invention provides a method for adjusting display brightness of a liquid crystal display screen, which comprises the following steps:
the mobile terminal acquires the change information of the ambient light brightness;
the mobile terminal determines that the change information of the ambient light brightness is that the brightness increase exceeds a first threshold value in unit time, and selects a characteristic curve from a preset characteristic curve set according to the change information of the ambient light brightness, wherein the characteristic curve is obtained by increasing the offset in the brightness direction on the basis of a normalized gamma curve, and the offset in the brightness direction is gradually reduced along with the increase of the gray value;
and the mobile terminal adjusts the brightness displayed by the display screen by adopting the selected characteristic curve.
In a possible implementation manner, the preset characteristic curve set includes a plurality of characteristic curves, where an offset in the luminance direction corresponding to each characteristic curve is different.
In a possible embodiment, the characteristic selected from the predetermined set of characteristics is shifted by the greatest amount in the brightness direction.
In a possible embodiment, the adjusting, by the mobile terminal, the displayed brightness using the selected characteristic curve includes:
and the mobile terminal inputs the selected characteristic curve into a circuit for adjusting display brightness, and the circuit for adjusting display brightness adopts the characteristic curve to replace a gamma curve to adjust the displayed brightness.
The embodiment of the invention provides another method for adjusting the display brightness of a liquid crystal display screen, which comprises the following steps:
the mobile terminal acquires the change information of the ambient light brightness;
the mobile terminal determines that the change information of the ambient light brightness is that the brightness is reduced by more than a second threshold value in unit time, and sequentially selects more than two characteristic curves from a preset characteristic curve set according to the change information of the ambient light brightness, wherein the characteristic curves are obtained by increasing the offset in the brightness direction on the basis of a normalized gamma curve, the offset in the brightness direction is gradually reduced along with the increase of the gray value, and the selected more than two characteristic curves are arranged according to the sequence that the offset in the corresponding brightness direction is from large to small;
and the mobile terminal respectively adopts the selected characteristic curves to adjust the brightness displayed by the display screen according to the arrangement sequence of the selected more than two characteristic curves.
In a possible implementation manner, the preset characteristic curve set includes more than two characteristic curves, where an offset in the luminance direction corresponding to each characteristic curve is different.
In a possible embodiment, the adjusting, by the mobile terminal, the displayed brightness using the selected characteristic curve includes:
and the mobile terminal inputs the selected characteristic curve into a circuit for adjusting display brightness, and the circuit for adjusting display brightness adopts the characteristic curve to replace a gamma curve to adjust the displayed brightness.
The embodiment of the invention also provides a display brightness adjusting device of the liquid crystal display screen, which comprises:
the acquisition module is used for acquiring the change information of the ambient light brightness;
the selection module is used for determining that the change information of the ambient light brightness is that the brightness increase exceeds a first threshold value in unit time, and selecting a characteristic curve from a preset characteristic curve set according to the change information of the ambient light brightness, wherein the characteristic curve is obtained by increasing the offset in the brightness direction on the basis of a normalized gamma curve, and the offset in the brightness direction is gradually reduced along with the increase of the gray value;
and the adjusting module is used for adjusting the brightness displayed by the display screen by adopting the selected characteristic curve.
In a possible implementation manner, the preset characteristic curve set includes a plurality of characteristic curves, where an offset in the luminance direction corresponding to each characteristic curve is different.
In a possible embodiment, the selection module selects a characteristic curve from a preset set of characteristic curves, and the offset of the selected characteristic curve in the luminance direction is the largest.
In a possible embodiment, the adjusting module is specifically configured to:
and inputting the selected characteristic curve into a circuit for adjusting display brightness, and adjusting the display brightness by the circuit for adjusting the display brightness by replacing the gamma curve with the characteristic curve.
An embodiment of the present invention further provides another display brightness adjusting apparatus for a liquid crystal display, including:
the acquisition module is used for acquiring the change information of the ambient light brightness;
the selection module is used for determining that the change information of the ambient light brightness is that the brightness is reduced by more than a second threshold value in unit time, and sequentially selecting more than two characteristic curves from a preset characteristic curve set according to the change information of the ambient light brightness, wherein the characteristic curves are obtained by increasing the offset in the brightness direction on the basis of a normalized gamma curve, the offset in the brightness direction is gradually reduced along with the increase of the gray value, and the selected more than two characteristic curves are arranged according to the sequence that the offset in the corresponding brightness direction is from large to small;
and the adjusting module is used for adjusting the brightness displayed by the display screen by respectively adopting the selected characteristic curves according to the arrangement sequence of the selected more than two characteristic curves.
In a possible implementation manner, the preset characteristic curve set includes more than two characteristic curves, where an offset in the luminance direction corresponding to each characteristic curve is different.
In a possible embodiment, the adjusting module is specifically configured to:
and inputting the selected characteristic curve into a circuit for adjusting display brightness, and adjusting the display brightness by the circuit for adjusting the display brightness by replacing the gamma curve with the characteristic curve.
Based on the technical scheme, in the embodiment of the invention, if the mobile terminal determines that the increase of the ambient light brightness exceeds the first threshold value in unit time, it may be determined that the mobile terminal moves from an indoor environment where ambient light is weak to an outdoor environment where ambient light is strong, selecting a characteristic curve from a preset characteristic curve set according to the change of the ambient light brightness, adjusting the brightness of the display image of the display screen by using the selected characteristic curve, so as to increase the brightness of the low-gray-scale part of the display image, improve the display effect of the display screen of the mobile terminal in a strong light environment, enable the user of the mobile terminal to clearly see the display information of the display screen, and the brightness of the high gray scale part is kept as much as possible to prevent the display distortion of the display screen of the mobile terminal, therefore, the display effect of the display screen of the mobile terminal is improved, the algorithm is simple, and extra hardware is not required to be added. Alternatively, the first and second electrodes may be,
if the mobile terminal determines that the ambient light brightness is reduced to exceed the second threshold value within unit time, the mobile terminal can be determined to move from an outdoor environment with stronger ambient light to an indoor environment with weaker ambient light, more than two characteristic curves are sequentially selected from a preset characteristic curve set according to the change of the ambient light brightness, because the selected more than two characteristic curves are arranged according to the sequence of the offset in the corresponding brightness direction from large to small, if the offset in the brightness direction corresponding to the characteristic curves is larger, the display brightness of the display screen is brighter after adjustment, so that the gradual change effect that the display brightness of the display screen of the mobile terminal gradually changes from bright to dark can be achieved under the condition that the display brightness of the display screen is respectively adjusted by adopting each selected characteristic curve according to the arrangement sequence of the more than two characteristic curves, and the display effect that the brightness of the display screen changes suddenly when the mobile terminal moves from a strong light environment to a dark room environment can be avoided, therefore, the display effect of the display screen of the mobile terminal is improved, the algorithm is simple, and extra hardware is not required to be added.
Drawings
Fig. 1 is a schematic flow chart illustrating a method for adjusting display brightness of a mobile terminal according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the relationship between sensor output values and ambient light in an embodiment of the present invention;
FIG. 3 is a diagram illustrating a relationship between a gamma curve and a characteristic curve according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating a comparison of brightness adjustment effects using different characteristic curves according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating a method for adjusting display brightness of another mobile terminal according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of an apparatus according to an embodiment of the present invention;
FIG. 7 is a schematic view of another embodiment of an apparatus according to the present invention;
fig. 8 is a schematic structural diagram of a mobile terminal in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the embodiment of the present invention, as shown in fig. 1, a detailed method flow for adjusting the display brightness of the liquid crystal display by the mobile terminal is as follows:
step 101: the mobile terminal acquires the change information of the ambient light brightness.
In implementation, the mobile terminal obtains the ambient light brightness through the optical sensor, and the mobile terminal determines the change information of the ambient light brightness according to the ambient light brightness obtained by periodic sampling of the optical sensor.
In practical application, the change of the ambient light intensity is nonlinear, the indoor light intensity is generally below 500 LUX (LUX), the ambient light intensity of the indoor and outdoor connecting part is rapidly changed to 2000-3000 LUX, the outdoor light intensity is generally above 10000LUX, and the outdoor light intensity is 20000-30000 LUX on a sunny day. The user generally cannot see clearly the screen when the ambient light is 10000LUX, and the phenomenon of poor visibility becomes more and more obvious as the ambient light intensity continues to increase, wherein the LUX represents the illumination unit.
The optical sensor is a device for acquiring the ambient light intensity, the response range of the middle-high end optical sensor can reach 0-10000 LUX, the visual angle is +/-30 degrees, and cost consideration in practical projects is difficult to achieve. The dynamic range of the low-end light sensor can detect 0-5000 LUX, the visual angle is +/-25 degrees, and a diagram of the relationship between the output value of the low-end light sensor and the ambient light is shown in FIG. 2. The light sensor is typically placed in the opening of the display screen, and the dynamic range of the light sensor is calculated as 10% transmittance in this application. As can be seen from fig. 2, taking the low-end sensor as an example, the response of the light sensor is linear, the maximum illuminance value that can be monitored by the actual light sensor is around 5204LUX, and when the ambient light illuminance is greater than the maximum illuminance value, the maximum illuminance value is calculated according to the maximum illuminance value. Therefore, the light sensor can reflect the change of the ambient light intensity to a certain extent.
Step 102: the mobile terminal determines that the change information of the ambient light brightness is that the brightness increase exceeds a first threshold value in unit time, and selects a characteristic curve from a preset characteristic curve set according to the change information of the ambient light brightness.
Wherein the characteristic curve is obtained by increasing the offset in the luminance direction on the basis of the normalized gamma curve, and the offset in the luminance direction increased on the basis of the normalized gamma curve satisfies: gradually decreasing with increasing gray value. The characteristic curve is an irregular nonlinear curve, the normalized gamma curve is increased by a larger offset amount at the display brightness corresponding to the low gray scale part, and a smaller offset amount at the display brightness corresponding to the high gray scale part, and a plurality of characteristic curves can be obtained by adjusting the offset amount, wherein the characteristic curves can change the gray scale distribution of the display image, so that the low gray scale part is compressed and the high gray scale part is expanded. When the low-gray-scale portion of the display image is decreased and the high-gray-scale portion of the display image is increased, the luminance of the display image is increased and the display image is more easily recognized by human eyes.
The normalized gamma curve is obtained by performing normalization processing on the gamma curve for adjusting the brightness of the display image. In the embodiment of the present invention, the gamma curve may be a gamma 2.4 curve, a gamma 2.2 curve, a gamma 2.0 curve, or the like. Specifically, the gamma 2.4 curve is represented as
The gamma 2.2 curve is expressed as gamma 2.0 curve
In which the gray scale of the image is represented,
indicating the display brightness.
The preset characteristic curve set comprises a plurality of characteristic curves, wherein the offset of each characteristic curve in the characteristic curve set in the luminance direction is different.
In a preferred embodiment, the characteristic selected from the predetermined set of characteristics is shifted by the greatest amount in the direction of brightness.
Wherein the gamma curve is a non-linear curve for reflecting a relationship between the luminance of the image signal output from the display screen and the luminance of the input image signal such that the gray scale of the image is linearly changed from 0 to 255. An image displayed on a standard display in an indoor environment substantially satisfies a gamma curve. As shown in fig. 3, a schematic diagram of 32 gray levels satisfying a gamma curve is shown below the abscissa, and a characteristic curve is a deformation of the gamma curve, and the characteristic curve aims to enhance the brightness of the low gray levels, so that the low gray levels of the displayed image can be easily identified in the sun, and the brightness of the high gray levels of the displayed image can be maintained as much as possible, thereby reducing the distortion.
The solid line shown in fig. 3 is a schematic diagram of normalizing a gamma curve to a straight line having a slope of 45 °, the abscissa represents a gray value (or gray level), and the ordinate represents luminance. It can be seen from the normalized gamma curve of fig. 3 that 127 is the intermediate gray level, and the gray level distribution of a picture is brighter around and above this value. The gray scale value corresponding to the darker area in the image is low, and the image is not easily distinguished under strong ambient light, and the image content below 63 gray scales in the sunlight is difficult to see. According to this principle, a characteristic curve is obtained by adjusting a gamma curve, and a characteristic curve is obtained by nonlinearly increasing the luminance of the gamma curve at a low gray level. As shown by the dotted lines in fig. 3, the characteristic curves differ in the amount of shift from the gamma curve in the low gray-scale portion, and the degree of brightness enhancement is also different. The characteristic curves 1, 2, and 3 are characteristic curves for realizing different degrees of brightness enhancement, and the characteristic curve 3 has the highest degree of brightness enhancement. It is not necessary to adjust the gray scale to be too large to cause image distortion.
Step 103: and the mobile terminal adjusts the brightness displayed by the display screen by adopting the selected characteristic curve.
In implementation, the mobile terminal adjusts the displayed brightness by adopting the selected characteristic curve, and the specific process is as follows: the mobile terminal inputs the selected characteristic curve into a circuit for display brightness adjustment, and the circuit for display brightness adjustment adjusts the displayed brightness by replacing the gamma curve with the characteristic curve.
In the embodiment of the invention, after the brightness displayed by the display screen is adjusted by adopting the characteristic curve, the low-gray-scale part is compressed, and the high-gray-scale part is expanded. As shown in fig. 4, the effect of the characteristic curve 1, the characteristic curve 2, and the characteristic curve 3 shown in fig. 3 after adjusting the display brightness is shown, the identification degree of the display is improved after adjusting the characteristic curve, and the gray statistical graphs of a plurality of gray scales are compared, so that it can be seen that the high gray scale portion displayed shows a gradually increasing trend.
Based on the above technical solution, in the embodiment of the present invention, if it is determined that the ambient light intensity increases beyond the first threshold in a unit time, it may be determined that the mobile terminal moves from an indoor environment with weak ambient light to an outdoor environment with strong ambient light, a characteristic curve is selected from a preset characteristic curve set according to a change of the ambient light intensity, and the brightness of an image displayed on the display screen is adjusted by using the selected characteristic curve, so as to increase the brightness of a low gray scale portion of the displayed image, improve the display effect of the display screen of the mobile terminal in a strong light environment, enable a user of the mobile terminal to clearly see display information of the display screen, and maintain the brightness of a high gray scale portion as much as possible, so as to prevent the display screen of the mobile terminal from displaying a distortion phenomenon, thereby improving the display effect of the display screen of the mobile terminal, and improving the display effect of the display screen of the mobile terminal, the algorithm is simple and no additional hardware is required.
Based on the same inventive concept, in the embodiment of the present invention, as shown in fig. 5, a detailed method flow for the mobile terminal to perform the display brightness adjustment of the liquid crystal display screen is as follows:
step 501: the mobile terminal acquires the change information of the ambient light brightness.
In implementation, the mobile terminal obtains the ambient light brightness through the optical sensor, and the mobile terminal determines the change information of the ambient light brightness according to the ambient light brightness obtained by periodic sampling of the optical sensor.
Step 502: the mobile terminal determines that the change information of the ambient light brightness is that the brightness is reduced by more than a second threshold value in unit time, and sequentially selects more than two characteristic curves from a preset characteristic curve set according to the change information of the ambient light brightness, wherein the characteristic curves are obtained by increasing the offset in the brightness direction on the basis of the normalized gamma curve, the offset in the brightness direction is gradually reduced along with the increase of the gray value, and the selected more than two characteristic curves are arranged in the sequence of the corresponding offsets in the brightness direction from large to small.
In implementation, the preset characteristic curve set includes more than two characteristic curves, where the offset in the luminance direction corresponding to each characteristic curve is different. Here, the characteristic curve is the same as the characteristic curve described in step 102, and is not described here again.
Step 503: and the mobile terminal respectively adopts the selected characteristic curves to adjust the brightness displayed by the display screen according to the arrangement sequence of the selected more than two characteristic curves.
In implementation, the mobile terminal adjusts the displayed brightness by adopting the selected characteristic curve, and the specific process is as follows: the mobile terminal inputs the selected characteristic curve into a circuit for display brightness adjustment, and the circuit for display brightness adjustment adjusts the displayed brightness by replacing the gamma curve with the characteristic curve.
Specifically, the mobile terminal selects one characteristic curve from the two or more selected characteristic curves at set intervals according to the arrangement sequence of the two or more selected characteristic curves, and adjusts the brightness displayed on the display screen. Wherein the set time duration can be determined by simulation and is related to the adaptation time duration of the environment from light to dark of human eyes.
In the implementation, after the brightness displayed by the display screen is adjusted by sequentially adopting more than two selected characteristic curves, the interval set time length is recovered to the brightness displayed by the display screen which is adjusted by adopting the preset gamma curve, namely, the brightness is recovered to the brightness adjustment mode of the display screen under the darkroom environment. The set time length can be determined through simulation and is related to the adaptive time length of the human eyes from the light environment to the dark environment.
In practical application, as people walk indoors and outdoors or the light sensor is shielded outdoors, the ambient light brightness detected by the light sensor changes suddenly, and if the mobile terminal rapidly selects the characteristic curve to adjust the display brightness when detecting the sudden change of the ambient light brightness, the phenomenon of displaying suddenly and suddenly is caused. In addition, the perception of brightness and darkness by the human eye is relatively complex, for example, the human eye adapts faster from a dark environment to a bright environment and adapts slower from a bright environment to a dark environment. In view of this, when the mobile terminal determines that the change information of the ambient light brightness is that the brightness decreases by more than the second threshold, that is, when it is determined that a sudden change from light to dark occurs, the mobile terminal sequentially adjusts the brightness displayed on the display screen by using different characteristic curves according to the sequence of the offsets from large to small in the brightness direction, so as to avoid discomfort feeling of human eyes caused by the sudden change of the brightness of the display screen.
Based on the above technical solution, in the embodiment of the present invention, if it is determined that the ambient light brightness decreases by more than the second threshold in a unit time, it may be determined that the mobile terminal moves from an outdoor environment with strong ambient light to an indoor environment with weak ambient light, then sequentially select two or more characteristic curves from a preset characteristic curve set according to a change of the ambient light brightness, because the two or more selected characteristic curves are arranged in a sequence from a large offset to a small offset in a corresponding brightness direction, if the offset in the brightness direction corresponding to the characteristic curve is larger, the display brightness of the display screen after adjustment is brighter, so that a gradual change effect that the display brightness of the display screen of the mobile terminal gradually changes from bright to dark can be achieved under the condition that the display brightness of the display screen is adjusted by respectively adopting each selected characteristic curve according to the arrangement sequence of the two or more characteristic curves, the display effect of sudden brightness change of the display screen caused to human eyes when the mobile terminal is moved from a strong light environment to a darkroom environment is avoided, so that the display effect of the display screen of the mobile terminal is improved, the algorithm is simple, and extra hardware is not required to be added.
Based on the same inventive concept, in the embodiments of the present invention, a display brightness adjusting apparatus for a liquid crystal display is provided, and for specific implementation of the apparatus, reference may be made to the description of the above method, and repeated descriptions are omitted, as shown in fig. 6, the apparatus mainly includes:
an obtaining module 601, configured to obtain change information of ambient light brightness;
a selecting module 602, configured to determine that the change information of the ambient light brightness is that brightness increases by more than a first threshold in a unit time, and select a characteristic curve from a preset set of characteristic curves according to the change information of the ambient light brightness, where the characteristic curve is obtained by increasing an offset in a brightness direction on the basis of a normalized gamma curve, and the offset in the brightness direction gradually decreases with an increase in a grayscale value;
and an adjusting module 603, configured to adjust the brightness displayed on the display screen by using the selected characteristic curve.
In an implementation, the preset characteristic curve set includes a plurality of characteristic curves, where an offset in the luminance direction corresponding to each characteristic curve is different.
In an implementation, the selection module selects a characteristic curve from a preset characteristic curve set, and the offset of the selected characteristic curve in the brightness direction is the largest.
In an implementation, the adjusting module is specifically configured to:
and inputting the selected characteristic curve into a circuit for adjusting the brightness of the display image, and adjusting the brightness of the display image by the circuit for adjusting the brightness of the display image by replacing the gamma curve with the characteristic curve.
In an implementation, the apparatus further includes a storage module, and the storage module is configured to store a preset set of characteristic curves. The selection module selects a characteristic from the set of characteristics stored by the storage module.
Based on the same inventive concept, in the embodiment of the present invention, another display brightness adjusting apparatus for a liquid crystal display is provided, and for specific implementation of the apparatus, reference may be made to the description of the above method, and repeated descriptions are omitted, as shown in fig. 7, the apparatus mainly includes:
an obtaining module 701, configured to obtain change information of ambient light brightness;
a selecting module 702, configured to determine that the change information of the ambient light brightness is that brightness decreases by more than a second threshold in a unit time, and sequentially select two or more characteristic curves from a preset characteristic curve set according to the change information of the ambient light brightness, where the characteristic curves are obtained by increasing an offset in a brightness direction on the basis of a normalized gamma curve, the offset in the brightness direction gradually decreases with an increase of a gray value, and the two or more selected characteristic curves are arranged in a sequence that the offset in the brightness direction is from large to small;
and an adjusting module 703, configured to adjust the brightness displayed on the display screen by using the selected characteristic curves according to the arrangement order of the selected two or more characteristic curves.
In an implementation, the preset characteristic curve set includes more than two characteristic curves, where the offset in the luminance direction corresponding to each characteristic curve is different.
In an implementation, the adjusting module is specifically configured to:
and inputting the selected characteristic curve into a circuit for adjusting display brightness, and adjusting the display brightness by the circuit for adjusting the display brightness by replacing the gamma curve with the characteristic curve.
Specifically, the adjusting module is configured to select one of the two or more selected characteristic curves at a set time interval according to an arrangement order of the two or more selected characteristic curves, and adjust the brightness displayed on the display screen. Wherein the set time duration can be determined by simulation and is related to the adaptation time duration of the environment from light to dark of human eyes.
Specifically, the adjusting module is configured to restore the interval set time length to the adjustment of the brightness displayed by the display screen by using the preset gamma curve after adjusting the brightness displayed by the display screen by using the selected two or more characteristic curves in sequence, that is, restore to the brightness adjustment mode of the display screen in the darkroom environment. The set time length can be determined through simulation and is related to the adaptive time length of the human eyes from the light environment to the dark environment.
In an implementation, the apparatus further includes a storage module, and the storage module is configured to store a preset set of characteristic curves. The selection module selects a characteristic from the set of characteristics stored by the storage module.
Based on the same inventive concept, the embodiment of the present invention provides a mobile terminal, as shown in fig. 8, which includes a light sensor 801, a display brightness adjustment apparatus 802 described in fig. 6 or fig. 7, and a circuit 803 for adjusting the brightness of a display image. The optical sensor 801 is connected to the acquisition module 601 or 701 of the display luminance adjustment apparatus 802, and the adjustment module 603 or 703 of the display luminance adjustment apparatus 802 is connected to the circuit 803 for adjusting the display luminance.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (2)
1. A method for adjusting display brightness of a liquid crystal display screen, comprising:
the mobile terminal obtains the ambient light brightness through periodic sampling of a light sensor;
the mobile terminal determines that the change information of the ambient light brightness is that the brightness is reduced by more than a second threshold value in unit time, sequentially selects more than two characteristic curves from a preset characteristic curve set according to the change information of the ambient light brightness, and the selected more than two characteristic curves are arranged according to the sequence of the corresponding offset in the brightness direction from large to small, wherein the characteristic curves are the deformation of gamma curves, the normalized gamma curves are increased by a large offset on the display brightness corresponding to a low gray scale part, and the normalized gamma curves are increased by a small offset on the display brightness corresponding to a high gray scale part;
and the mobile terminal respectively adjusts the brightness of the display screen by adopting the selected characteristic curves according to the arrangement sequence of the selected more than two characteristic curves.
2. A display luminance adjusting apparatus for a liquid crystal display panel, comprising:
the acquisition module is used for acquiring the ambient light brightness through periodic sampling of the optical sensor;
the selection module is used for determining that the brightness reduction exceeds a second threshold value within unit time according to the change information of the ambient light brightness, sequentially selecting more than two characteristic curves from a preset characteristic curve set according to the change information of the ambient light brightness, and arranging the selected more than two characteristic curves in a sequence from large offset to small offset in the corresponding brightness direction, wherein the characteristic curves are the deformation of gamma curves, the normalized gamma curves are increased by large offset at the display brightness corresponding to a low gray-scale part, and the normalized gamma curves are increased by small offset at the display brightness corresponding to a high gray-scale part;
and the adjusting module is used for adjusting the brightness of the display screen by respectively adopting the selected characteristic curves according to the arrangement sequence of the selected more than two characteristic curves.
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| CN201810322389.XA CN108538265B (en) | 2016-03-31 | 2016-03-31 | Display brightness adjusting method and device of liquid crystal display screen |
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Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018000231A1 (en) * | 2016-06-29 | 2018-01-04 | 宋英楠 | Method and device for controlling incoming call answering of mobile phone |
| CN106297678A (en) * | 2016-09-08 | 2017-01-04 | 乐视控股（北京）有限公司 | Luminance regulating method and device |
| CN106502609B (en) * | 2016-10-31 | 2019-11-15 | 维沃移动通信有限公司 | A kind of display brightness method of adjustment and mobile terminal |
| CN109271014B (en) * | 2017-07-18 | 2022-04-22 | 华为终端有限公司 | Method and equipment for adjusting screen brightness |
| EP3682439B1 (en) | 2017-12-15 | 2024-02-21 | Google LLC | Adaptive display brightness adjustment |
| CN109166549B (en) * | 2018-10-10 | 2021-03-26 | 惠科股份有限公司 | Display device driving method and display device |
| CN109064966B (en) * | 2018-10-31 | 2021-08-27 | 武汉天马微电子有限公司 | Driving method and driving chip of display panel and display device |
| CN109584823A (en) * | 2018-12-20 | 2019-04-05 | 深圳市视安通电子有限公司 | A kind of liquid crystal display colour cast supplement alignment technique |
| CN109859719B (en) * | 2019-02-19 | 2020-12-18 | 北京集创北方科技股份有限公司 | Brightness compensation method, compensation circuit and display device thereof |
| CN111696475B (en) * | 2019-03-15 | 2021-11-16 | 西安诺瓦星云科技股份有限公司 | Display control method, device and system, storage medium and display control card |
| CN111916031B (en) * | 2019-05-10 | 2023-03-21 | 京东方科技集团股份有限公司 | Display method and display device |
| CN112019824B (en) * | 2019-05-30 | 2023-04-11 | 深圳光峰科技股份有限公司 | Display device |
| CN111294575B (en) * | 2020-01-19 | 2022-06-28 | Oppo广东移动通信有限公司 | Image processing method, image processing device, electronic equipment and storage medium |
| CN111540317A (en) * | 2020-06-19 | 2020-08-14 | 广州视源电子科技股份有限公司 | Brightness control method and device, storage medium and related equipment |
| CN114360420A (en) * | 2020-10-13 | 2022-04-15 | 明基智能科技（上海）有限公司 | Image adjusting method of display device and display device |
| CN112365860B (en) * | 2020-10-27 | 2023-01-20 | 深圳Tcl新技术有限公司 | Terminal screen brightness adjusting method, terminal screen brightness adjusting equipment and storage medium |
| CN112484967B (en) * | 2020-11-18 | 2023-04-07 | 深圳市汇顶科技股份有限公司 | Light intensity detection method, light intensity detection device, light intensity parameter determination method, light intensity parameter determination device, equipment and storage medium |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7403181B2 (en) * | 2001-06-02 | 2008-07-22 | Samsung Electronics Co., Ltd. | Liquid crystal display with an adjusting function of a gamma curve |
| CN100527205C (en) * | 2006-03-20 | 2009-08-12 | 广达电脑股份有限公司 | Lighteness adjusting apparatus and method thereof |
| CN101191926A (en) * | 2006-12-01 | 2008-06-04 | 英业达股份有限公司 | LCD device and its gamma curve adjusting apparatus and process |
| KR101604482B1 (en) * | 2008-08-14 | 2016-03-25 | 엘지디스플레이 주식회사 | Liquid Crystal Display and Driving Method Thereof |
| CN102456317A (en) * | 2010-10-19 | 2012-05-16 | 昆达电脑科技(昆山)有限公司 | Display screen with adjustable partial backlights |
| CN103137075B (en) * | 2011-12-05 | 2016-03-02 | 联想(北京)有限公司 | Terminal device and display control method |
| WO2014014005A1 (en) * | 2012-07-19 | 2014-01-23 | 富士フイルム株式会社 | Image display device and method |
| CN102903347B (en) * | 2012-10-29 | 2015-04-22 | 广东步步高电子工业有限公司 | Method and system for effectively solving problem of unclear display of liquid crystal display screen under sunshine |
| KR102076312B1 (en) * | 2013-08-21 | 2020-03-18 | 삼성디스플레이 주식회사 | Display device |
-
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| CN108538265A (en) | 2018-09-14 |
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Address after: 266100 No. 151, Zhuzhou Road, Laoshan District, Shandong, Qingdao Patentee after: Qingdao Hisense Mobile Communication Technology Co.,Ltd. Address before: 266100 No. 151, Zhuzhou Road, Laoshan District, Shandong, Qingdao Patentee before: HISENSE MOBILE COMMUNICATIONS TECHNOLOGY Co.,Ltd. |