CN111292688B - Screen brightness adjusting method and device and display device - Google Patents
Screen brightness adjusting method and device and display device Download PDFInfo
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- CN111292688B CN111292688B CN202010117502.8A CN202010117502A CN111292688B CN 111292688 B CN111292688 B CN 111292688B CN 202010117502 A CN202010117502 A CN 202010117502A CN 111292688 B CN111292688 B CN 111292688B
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- 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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3233—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
Abstract
The embodiment of the disclosure provides a screen brightness adjusting method and device and a display device, which can avoid the situation that the duty ratio of PWM is small in a low-brightness mode so as to reduce the fatigue of eyes of a user caused by a PWM dimming process. The screen brightness adjusting method comprises the following steps: in a first brightness mode, dividing all pixels in a screen into N pixel groups; taking continuously displayed N frames of pictures as a display cycle, driving pixels corresponding to an Mth pixel group to display when an Mth frame of picture in the display cycle is displayed, and simultaneously adjusting the duty ratio of a pulse width modulation signal to a first threshold, wherein N is more than or equal to M and is more than or equal to 1; the ratio of the display brightness of the mth frame picture in the screen to the maximum display brightness of the screen is equal to the ratio of the number of pixels of the mth pixel group to the number of all pixels in the screen multiplied by the first threshold. The screen brightness adjusting method provided by the embodiment of the disclosure is used for adjusting the screen brightness of the OLED display device in a dark environment.
Description
Technical Field
The disclosure relates to the technical field of computers, in particular to a screen brightness adjusting method.
Background
With the impact of the trend of large screen, full screen, and thin and Light machine type, more and more mobile phones use Organic Light-Emitting Diode (OLED) screens. Compared with a Liquid Crystal Display (LCD) screen, the OLED screen has many advantages: light and thin, power saving, good color and the like.
At present, most of mobile phones using an OLED screen adjust the brightness of the screen using a dimming mode of high-brightness Direct Current (DC) dimming and low-brightness Pulse Width Modulation (PWM) dimming.
However, when the PWM is used for dimming, the screen of the mobile phone is always in an alternate state between on and off, so as to achieve the purpose of dimming the screen brightness. Therefore, when the screen is in the PWM dimming mode, the problem of stroboscopic light follows. Especially, when the brightness of the screen is low, the duty ratio of the pulse width modulation signal corresponding to the PWM dimming is small, which is easy to bring a strong fatigue feeling to the eyes of the user.
Disclosure of Invention
The embodiment of the disclosure provides a screen brightness adjusting method and device and a display device, which can avoid that the duty ratio of PWM is small in a low-brightness mode so as to reduce the fatigue brought to eyes of a user in the PWM dimming process.
In order to achieve the purpose, the embodiment of the disclosure adopts the following technical scheme:
in a first aspect, a method for adjusting screen brightness is provided. The screen brightness adjusting method comprises the following steps: in a first brightness mode, dividing all pixels in a screen into N pixel groups; and taking N frames of continuously displayed pictures as a display cycle, driving pixels in the corresponding Mth pixel group to display when the Mth frame of pictures in the display cycle are displayed, and simultaneously adjusting the duty ratio of the pulse width modulation signal to a first threshold, wherein N is more than or equal to M and is more than or equal to 1. The number of the pixels in each pixel group is equivalent and is not overlapped, the pixels in each pixel group are uniformly distributed in the screen, and each pixel group can correspondingly display a frame of picture. N is more than or equal to 2 and is a positive integer. The ratio of the display luminance of the mth frame picture in the screen to the maximum display luminance of the screen, which is the ratio of the number of pixels in the mth pixel group to the number of all pixels in the screen, is multiplied by the first threshold.
The method for adjusting the screen brightness provided by the embodiment of the disclosure can divide all pixels in a screen into a plurality of pixel groups according to a first brightness mode, and then periodically and selectively light all pixels on the screen by taking a plurality of frames of pictures with corresponding numbers displayed continuously as a display cycle, that is, periodically and one by one drives each pixel group to independently display the corresponding frame of picture. Thus, while each pixel group is driven to display the corresponding frame picture, the duty ratio of the corresponding pulse width modulation signal can be adjusted to the first threshold value, so that the ratio of the display brightness of the frame picture in the screen to the maximum display brightness of the screen is equal to the ratio of the number of pixels in the corresponding pixel group to the number of all pixels in the screen multiplied by the first threshold value. Therefore, the display brightness of the frame picture under the first brightness mode can be effectively adjusted by controlling the duty ratio of the number of pixels in the corresponding pixel group and the duty ratio of the pulse width modulation signal.
In this way, the embodiment of the present disclosure can flexibly adjust the luminous flux entering the human eye by controlling the lighting of a part of pixels in the screen to display the corresponding frame picture, so as to flexibly adjust the display brightness of the screen. Therefore, in the first brightness mode, for example, in a low brightness mode (dark environment), the duty ratio of the pulse width modulation signal is combined to adjust the screen brightness, so that the situation that the duty ratio of the pulse width modulation signal is small can be avoided, that is, the switching of the black and white pictures sensed by human eyes due to the long display time of the black pictures is avoided, the flicker feeling of the human eyes can be reduced, and the fatigue feeling brought to the eyes of the user in the PWM dimming process is effectively reduced.
In addition, the number of the pixels in each pixel group is equivalent and is not overlapped, the pixels in each pixel group are uniformly distributed in the screen, and each pixel group correspondingly displays a frame of picture, so that the uniformity of the display brightness of the screen is favorably ensured.
In some embodiments, N ═ 2. The 1 st pixel group includes pixels of odd-numbered lines, and the 2 nd pixel group includes pixels of even-numbered lines. Driving the pixels in the 1 st pixel group to display, including: and driving the pixels of the odd rows to display row by row. Driving the display of the pixels in the 2 nd pixel group, comprising: and driving the pixels of the even lines to display line by line.
In some embodiments, N ═ 2. The 1 st pixel group includes pixels of odd columns, and the 2 nd pixel group includes pixels of even columns. Driving the pixels in the 1 st pixel group to display, including: and driving the pixels of the odd columns to display column by column. Driving the display of the pixels in the 2 nd pixel group, comprising: and driving the pixel display of the even column by column.
In some embodiments, N-4. The 1 st pixel group includes pixels in odd rows and odd columns, and the 2 nd pixel group includes pixels in even rows and even columns. The 3 rd pixel group comprises pixels in even rows and odd columns, and the 4 th pixel group comprises pixels in odd rows and even columns. Driving the pixels in the 1 st pixel group to display, including: and supplying data signals to the pixels of the odd columns, simultaneously supplying row scanning signals to the pixels of the odd rows row by row, and driving the pixels of the odd columns of the odd rows to display row by row. Driving the display of the pixels in the 2 nd pixel group, comprising: and supplying data signals to the pixels of the even-numbered columns, simultaneously supplying row scanning signals to the pixels of the even-numbered rows row by row, and driving the pixels of the even-numbered rows and the even-numbered columns to display row by row. Driving the display of the pixels in the 3 rd pixel group, comprising: and supplying data signals to the pixels of the odd columns, simultaneously supplying row scanning signals to the pixels of the even rows row by row, and driving the pixels of the odd columns of the even rows row by row to display. Driving the display of the pixels in the 4 th pixel group, comprising: and supplying data signals to the pixels of the even columns, and simultaneously supplying row scanning signals to the pixels of the odd rows line by line to drive the pixels of the odd rows and the even columns to display row by line.
In some embodiments, the screen brightness adjusting method further includes: in the second brightness mode, all pixels in the screen can correspondingly display one frame of picture, and the duty ratio of the pulse width modulation signal is adjusted to adjust the display brightness of the corresponding one frame of picture in the screen. Wherein the luminance of the second luminance mode is greater than the luminance of the first luminance mode.
In some embodiments, the screen brightness adjusting method further includes: in the third brightness mode, all pixels in the screen can correspondingly display one frame of picture, and the power supply voltage or the data voltage is adjusted to adjust the display brightness of the corresponding frame of picture in the screen. Wherein the brightness of the third brightness mode is greater than the brightness of the second brightness mode.
In a second aspect, a screen brightness adjusting device is provided. The screen brightness adjusting apparatus includes: the device comprises an acquisition module and a processing module electrically connected with the acquisition module. The acquisition module is configured to acquire a brightness mode of a screen and display brightness of a frame picture to be displayed. Here, the luminance pattern includes a first luminance pattern. The processing module is configured to divide all pixels in the screen into N pixel groups in a first brightness mode, drive the pixels in the corresponding pixel groups to display according to the sequence number of the frame picture to be displayed and the display brightness thereof, and simultaneously adjust the duty ratio of the pulse width modulation signal to a first threshold value. The number of the pixels in each pixel group is equivalent and is not overlapped, the pixels in each pixel group are uniformly distributed in the screen, and each pixel group can correspondingly display a frame of picture. N is more than or equal to 2 and is a positive integer. The ratio of the display brightness of the frame picture to be displayed in the screen to the maximum display brightness of the screen is equal to the ratio of the number of pixels in the corresponding pixel group to the number of all pixels in the screen multiplied by the first threshold.
The screen brightness adjusting device provided by the embodiment of the present disclosure is used for implementing the screen brightness adjusting method as described in the foregoing embodiments. The beneficial effects that the screen brightness adjusting device can achieve are the same as those that the screen brightness adjusting method in the foregoing embodiment can achieve, and details are not repeated here.
In some embodiments, the brightness mode further comprises a second brightness mode. The luminance of the second luminance mode is greater than the luminance of the first luminance mode. The processing module is further configured to: in the second brightness mode, all pixels in the screen are driven to display a frame picture to be displayed, and the duty ratio of the pulse width modulation signal is adjusted to adjust the display brightness of the frame picture in the screen.
In some embodiments, the luminance pattern further comprises a third luminance pattern. The third luminance mode has a luminance greater than the luminance of the second luminance mode. The processing module is further configured to: in the third brightness mode, all pixels in the screen are driven to display a frame picture to be displayed, and the power supply voltage or the data voltage is adjusted to adjust the display brightness of the frame picture in the screen.
In a third aspect, a display device is provided. The display device comprises a display panel and the screen brightness adjusting device electrically connected with the display panel.
The beneficial effects that can be achieved by the display device are the same as those that can be achieved by the screen brightness adjusting device in the above embodiment, and the description is omitted here.
In a fourth aspect, a computer-readable storage medium is provided, which stores computer instructions configured to perform the screen brightness adjustment method as described above.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic flowchart of a method for adjusting screen brightness according to an embodiment of the present disclosure;
FIG. 2 is a diagram illustrating a grouping of pixels on a screen according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of pixel lighting during a 1 st frame display corresponding to the 1 st pixel group shown in FIG. 2;
FIG. 4 is a schematic diagram of pixel lighting during a 2 nd frame display corresponding to the 2 nd pixel group shown in FIG. 2;
FIG. 5 is a schematic diagram of another screen pixel grouping provided by embodiments of the present disclosure;
FIG. 6 is a schematic diagram of pixel lighting during a 1 st frame of image display corresponding to the 1 st pixel group shown in FIG. 5;
FIG. 7 is a schematic diagram of pixel lighting during display of a 2 nd frame image corresponding to the 2 nd pixel group shown in FIG. 5;
FIG. 8 is a schematic diagram of another exemplary grouping of screen pixels according to an embodiment of the present disclosure;
FIG. 9 is a schematic diagram of pixel lighting during a 1 st frame of image display corresponding to the 1 st pixel group shown in FIG. 8;
FIG. 10 is a schematic diagram of pixel lighting during display of a 2 nd frame image corresponding to the 2 nd pixel group shown in FIG. 8;
FIG. 11 is a schematic diagram of pixel lighting during display of a 3 rd frame image corresponding to the 3 rd pixel group shown in FIG. 8;
FIG. 12 is a schematic diagram illustrating pixel lighting during displaying of a 4 th frame of picture corresponding to the 4 th pixel group shown in FIG. 8;
fig. 13 is a schematic structural diagram of a display device according to an embodiment of the disclosure.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
Currently, most OLED display screens adopt a low-frequency PWM dimming technology of 250 Hz. When the screen brightness is low, the stroboscopic rate caused by the low-frequency PWM dimming technique also becomes low, that is, the duty ratio of the corresponding pulse width modulation signal becomes small, so that the stroboscopic is more easily perceived by human eyes. Therefore, sensitive people can feel discomfort and have visual fatigue more easily.
Based on this, the embodiment of the disclosure provides a screen brightness adjusting method. Referring to fig. 1, the method for adjusting the screen brightness includes S100 to S200.
S100, in the first luminance mode, all pixels in the screen are divided into N pixel groups.
The first brightness mode is a brightness mode in which the display brightness of the screen is when the screen brightness adjustment method in the embodiment of the present disclosure is used to adjust the brightness of the screen, that is, the brightness mode in which the screen brightness adjustment method in the embodiment of the present disclosure is suitable for use. The method is specifically selected and determined according to actual needs, and the embodiment of the disclosure does not limit the method.
Optionally, the first luminance mode may include at least one of a high luminance mode, a middle luminance mode, or a low luminance mode. Generally, the current display brightness value of the screen in the high brightness mode is 70% to 100% (more than 70% and including 100%) of the maximum display brightness of the screen, the current display brightness value of the screen in the middle brightness mode is 30% to 70% (more than 30% and including 70%) of the maximum display brightness of the screen, and the current display brightness value of the screen in the low brightness mode is 0% to 30% (including 0% and 30%) of the maximum display brightness of the screen.
Illustratively, the first luminance mode is a low luminance mode.
S200, taking N frames of continuously displayed pictures as a display cycle, driving pixels in a corresponding Mth pixel group to display when an Mth frame of pictures in the display cycle is displayed, and meanwhile adjusting the duty ratio of a pulse width modulation signal to a first threshold value, wherein N is more than or equal to M and is more than or equal to 1.
Wherein N is more than or equal to 2 and is a positive integer. That is, all pixels in the screen display area may be divided into at least two pixel groups.
Further, the division of the pixel group needs to correspond to satisfying the following condition: the number of pixels in each pixel group is equal (i.e. the number is the same or approximately the same) and does not overlap with each other (i.e. the pixels in any two pixel groups are not repeated), the pixels in each pixel group are uniformly distributed in the screen, and each pixel group can correspondingly display one frame of picture. Therefore, the luminous flux entering human eyes is approximately the same when each frame of picture is displayed, and the uniformity of the brightness of the whole screen when each frame of picture is displayed is favorably ensured.
When the screen displays, the plurality of pixel groups are periodically lighted up by taking the continuous frame pictures with the number corresponding to the pixel groups as a display cycle, that is, each pixel group is periodically driven one by one to independently display the corresponding frame picture. Thus, while each pixel group is driven to display the corresponding frame picture, the duty ratio of the corresponding pulse width modulation signal can be adjusted to the first threshold value, so that: the ratio of the display brightness of the frame picture in the screen to the maximum display brightness of the screen is equal to the ratio of the number of pixels in the corresponding pixel group to the number of all pixels in the screen multiplied by the first threshold. And the display brightness of the frame picture in the screen is also the display brightness of the current screen.
Since the number of pixels in each pixel group is comparable, the ratio of the number of pixels in the corresponding pixel group to the number of total pixels in the screen can be considered to be or approximately 1/N. Thus, the first threshold is the ratio of N × the display luminance of the current screen to the maximum display luminance of the screen. Therefore, it is easy to see that, compared with the method of adjusting the screen display brightness by simply adjusting the duty ratio of the pwm signal, the method of adjusting the screen display brightness provided by the embodiments of the present disclosure is beneficial to avoiding the situation that the duty ratio of the pwm signal is small.
The method for adjusting the screen brightness provided by the embodiment of the disclosure can divide all pixels in a screen into a plurality of pixel groups according to a first brightness mode, and then periodically and selectively light all pixels on the screen by taking a plurality of frames of pictures with corresponding numbers displayed continuously as a display cycle, that is, periodically and one by one drives each pixel group to independently display the corresponding frame of picture. Thus, while each pixel group is driven to display the corresponding frame picture, the duty ratio of the corresponding pulse width modulation signal can be adjusted to the first threshold value, so that the ratio of the display brightness of the frame picture in the screen to the maximum display brightness of the screen is equal to the ratio of the number of pixels in the corresponding pixel group to the number of all pixels in the screen multiplied by the first threshold value. Therefore, the display brightness of the frame picture under the first brightness mode can be effectively adjusted by controlling the duty ratio of the number of pixels in the corresponding pixel group and the duty ratio of the pulse width modulation signal.
In this way, the embodiment of the present disclosure can flexibly adjust the luminous flux entering the human eye by controlling the lighting of a part of pixels in the screen to display the corresponding frame picture, so as to flexibly adjust the display brightness of the screen. Therefore, under the first brightness mode, for example, under a low-brightness mode (dark environment), the duty ratio of the pulse width modulation signal is combined to adjust the screen brightness, that is, switching of a black-and-white picture sensed by human eyes due to a long display time of the black-state picture is avoided, so that human eye flicker is reduced, and fatigue of the user eyes in the PWM dimming process is effectively reduced.
The above-mentioned ways of grouping the pixels in the screen may be various, and are specifically determined according to actual needs.
In some embodiments, the groups of pixels are divided by parity of the row number in which the corresponding pixel is located. Please refer to fig. 2, where N is 2. That is, in the first luminance mode, all pixels in the screen are divided into 2 pixel groups. The 1 st pixel group i includes pixels of odd-numbered lines and the 2 nd pixel group ii includes pixels of even-numbered lines.
One display cycle is 2 frames of pictures that are displayed continuously. When the 1 st frame picture in the cycle is displayed, the pixels in the 1 st pixel group I are driven line by line for display. And simultaneously adjusting the duty ratio of the pulse width modulation signal to correspond to the first threshold value. Fig. 3 is a schematic diagram of pixel lighting during the display of the frame 1. And driving the pixels in the 2 nd pixel group II row by row for displaying when the 2 nd frame picture in the cycle is displayed. And simultaneously adjusting the duty ratio of the pulse width modulation signal to correspond to the first threshold value. Fig. 4 is a schematic diagram of pixel lighting during display of the 2 nd frame picture.
Here, the first threshold is a ratio of the display luminance of the 2 × frame picture in the screen to the maximum display luminance of the screen. For example, when the display brightness of the frame picture in the screen is 25% of the maximum display brightness of the screen, the first threshold can be correspondingly determined to be 50%.
In other embodiments, the groups of pixels are divided by parity of the column ordinal number in which the corresponding pixel is located. Please refer to fig. 5, N is 2. That is, in the first luminance mode, all pixels in the screen are divided into 2 pixel groups. The 1 st pixel group i includes pixels of odd columns and the 2 nd pixel group ii includes pixels of even columns.
One display cycle is 2 frames of pictures that are displayed continuously. When the picture of the 1 st frame in the display cycle, the pixels in the 1 st pixel group I are driven column by column for display. And simultaneously adjusting the duty ratio of the pulse width modulation signal to correspond to the first threshold value. Fig. 6 is a schematic diagram of pixel lighting during the display of the frame 1 screen. And driving the pixels in the 2 nd pixel group II column by column for displaying when the 2 nd frame picture in the cycle is displayed. And simultaneously adjusting the duty ratio of the pulse width modulation signal to correspond to the first threshold value. Fig. 7 is a schematic diagram of pixel lighting during display of the 2 nd frame screen.
Here, the specific value of the first threshold is determined in the same manner as in the foregoing embodiment, and will not be described in detail here.
In still other embodiments, the pixel groups are divided according to the row sequence number and the parity of the column sequence number of the corresponding pixels. Referring to fig. 8, N is 4. That is, in the first luminance mode, all pixels in the screen are divided into 4 pixel groups. The 1 st pixel group I comprises pixels in odd rows and odd columns, the 2 nd pixel group II comprises pixels in even rows and even columns, the 3 rd pixel group III comprises pixels in even rows and odd columns, and the 4 th pixel group IV comprises pixels in odd rows and even columns.
4 frames of pictures which are continuously displayed are taken as a display cycle. In displaying the picture of the 1 st frame in the cycle, the data lines provide data signals to the pixels of the odd columns, and simultaneously provide row scanning signals to the pixels of the odd rows line by line through the grid lines so as to drive the pixels in the 1 st pixel group I to display. And simultaneously adjusting the duty ratio of the pulse width modulation signal to correspond to the first threshold value. Fig. 9 is a schematic diagram of pixel lighting during the display of the 1 st frame screen.
In displaying the 2 nd frame picture in the cycle, the data signals are provided to the pixels of the even number columns through the data lines, and simultaneously, the row scanning signals are provided to the pixels of the even number rows row by row through the grid lines so as to drive the pixels in the 2 nd pixel group II to display. And simultaneously adjusting the duty ratio of the pulse width modulation signal to correspond to the first threshold value. Fig. 10 is a schematic diagram of pixel lighting during display of the 2 nd frame screen.
In displaying the 3 rd frame picture in the cycle, the data signals are provided to the pixels of the odd columns through the data lines, and simultaneously, the row scanning signals are provided to the pixels of the even rows row by row through the grid lines so as to drive the pixels in the 3 rd pixel group III to display. And simultaneously adjusting the duty ratio of the pulse width modulation signal to correspond to the first threshold value. Fig. 11 is a schematic diagram of pixel lighting during display of the 3 rd frame screen.
In displaying the 4 th frame of picture in the cycle, the data signals are provided to the pixels of the even columns through the data lines, and simultaneously, the row scanning signals are provided to the pixels of the odd rows row by row through the grid lines so as to drive the pixels in the 4 th pixel group IV to display. And simultaneously adjusting the duty ratio of the pulse width modulation signal to correspond to the first threshold value. Fig. 12 is a schematic diagram of pixel lighting in the 4 th frame screen display.
At this time, the first threshold is the ratio of the display luminance of the 4 × frame picture in the screen to the maximum display luminance of the screen. For example, when the display brightness of each frame of picture in the screen is 15% of the maximum display brightness of the screen, it can be determined that the corresponding first threshold is 60%.
In some embodiments, the screen brightness adjusting method further includes: in the second brightness mode, all pixels in the screen can correspondingly display one frame of picture, and the duty ratio of the pulse width modulation signal is adjusted to adjust the display brightness of the corresponding one frame of picture in the screen. Wherein the luminance of the second luminance mode is greater than the luminance of the first luminance mode.
Optionally, when the first luminance mode is the low luminance mode, the second luminance mode includes at least one of the intermediate luminance mode or the high luminance mode.
Illustratively, the second luminance mode is an intermediate luminance mode.
In the second brightness mode, the single frame picture does not selectively light the pixels in the screen any more, but the display brightness of the corresponding one frame picture in the screen is adjusted by unilaterally adjusting the duty ratio of the pulse width modulation signal. At this time, the ratio of the display brightness of the frame picture to be displayed on the screen to the maximum display brightness of the screen is the duty ratio of the pulse width modulation signal. For example, the display brightness of the frame picture to be displayed on the screen is 40% of the maximum display brightness of the screen, and the duty ratio of the pulse width modulation signal is equal to 40%.
It can be seen that, in the second brightness mode, the duty ratio of the pulse width modulation signal is unilaterally adjusted to adjust the display brightness of a corresponding frame of picture on the screen, so that the situation that the duty ratio of the pulse width modulation signal is small can be avoided, and discomfort such as eye soreness and the like can not be brought to a user.
In some embodiments, the screen brightness adjusting method further includes: in the third brightness mode, all pixels in the screen can correspondingly display one frame of picture, and the power supply voltage or the data voltage is adjusted to adjust the display brightness of the corresponding frame of picture in the screen. Wherein the brightness of the third brightness mode is greater than the brightness of the second brightness mode.
For example, when the second luminance mode is the middle luminance mode, the third luminance mode includes the high luminance mode.
The driving transistors of the pixels in the screen work in a saturation region of a volt-ampere characteristic curve of the driving transistors in the high-brightness mode, at the moment, the display brightness of the pixels in the screen is adjusted by adjusting the power supply voltage or the data voltage, the method is a simple and easy-to-operate screen brightness adjusting method, and the fatigue of human eyes caused by stroboflash in the PWM dimming process can be effectively avoided under the condition that the good display effect of the screen is guaranteed.
The methods described in some embodiments of the present disclosure may be implemented by executing software instructions. The software instructions may be comprised of corresponding software modules that may be stored in Random Access Memory (RAM), flash memory, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), registers, a hard disk, a removable disk, a compact disc read only memory (CD-ROM), or any other form of storage medium known in the art.
Accordingly, some embodiments of the present disclosure also provide a computer-readable storage medium storing computer instructions configured to perform the screen brightness adjustment method as described above.
Those skilled in the art will recognize that, in one or more of the examples described above, the functions described in this disclosure may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
Some embodiments of the present disclosure also provide a screen brightness adjusting apparatus. Referring to fig. 13, the screen brightness adjusting device 3 includes: an acquisition module 31 and a processing module 32 electrically connected to the acquisition module 31. The acquisition module 31 is configured to acquire a luminance pattern of a screen and display luminance of a frame picture to be displayed. Here, the luminance pattern includes a first luminance pattern. The processing module 32 is configured to divide all pixels in the screen into N pixel groups in the first brightness mode, drive the pixels in the corresponding pixel groups to display according to the sequence number of the frame to be displayed and the display brightness thereof, and adjust the duty ratio of the pulse width modulation signal to the first threshold value. The number of the pixels in each pixel group is equivalent and is not overlapped, the pixels in each pixel group are uniformly distributed in the screen, and each pixel group can correspondingly display a frame of picture. N is more than or equal to 2 and is a positive integer. The ratio of the display brightness of the frame picture to be displayed in the screen to the maximum display brightness of the screen is equal to the ratio of the number of pixels in the corresponding pixel group to the number of all pixels in the screen multiplied by the first threshold.
In some embodiments, the brightness mode further comprises a second brightness mode. The luminance of the second luminance mode is greater than the luminance of the first luminance mode. The processing module 32 is further configured to: in the second brightness mode, all pixels in the screen are driven to display a frame picture to be displayed, and the duty ratio of the pulse width modulation signal is adjusted to adjust the display brightness of the frame picture in the screen.
In some embodiments, the luminance pattern further comprises a third luminance pattern. The third luminance mode has a luminance greater than the luminance of the second luminance mode. The processing module 32 is further configured to: in the third brightness mode, all pixels in the screen are driven to display a frame picture to be displayed, and the power supply voltage or the data voltage is adjusted to adjust the display brightness of the frame picture in the screen.
The function of the acquiring module 31 can be realized by receiving a corresponding brightness instruction in a processing terminal (e.g. a processor) or reading related data in a brightness sensing device (e.g. an ambient light sensor), as described above. The specific structure of the acquisition module can be selected and determined according to actual needs. Illustratively, the acquisition module 31 may be a data acquisition circuit.
The function of the processing module 32 is as described above, and the specific structure thereof can be selected and determined according to actual needs. For example, the processing module 32 may be an electronic device such as a driving chip or a processor with a data processing function. The processor may be a Central Processing Unit (CPU), or may be other general-purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or the like. Wherein a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The screen brightness adjusting device provided by the embodiment of the present disclosure is used for implementing the screen brightness adjusting method as described in the foregoing embodiments. The beneficial effects that the screen brightness adjusting device can achieve are the same as those that the screen brightness adjusting method in the foregoing embodiment can achieve, and details are not repeated here.
In a third aspect, a display device is provided. Referring to fig. 13, the display device 1 includes a display substrate 2, and a screen brightness adjusting device 3 electrically connected to the display substrate 2.
As an example, the display substrate 2 generally includes a substrate and a plurality of pixels arranged in an array on the substrate. The pixels in each row are correspondingly connected with a grid line, and the pixels in each column are correspondingly connected with a data line. Each pixel can be turned on according to a scanning signal supplied to the corresponding gate line and a data signal supplied to the corresponding data line. Of course, the display substrate 2 usually includes other electronic components, which are not described in detail herein.
The processing module 32 of the screen brightness adjusting apparatus 3 in the above embodiment is electrically connected to each gate line, each data line, and a power voltage terminal in the display substrate 2, so that the display brightness of the display substrate 2 can be adjusted by corresponding brightness adjusting methods in different brightness modes. In addition, optionally, the acquiring module 31 in the screen brightness adjusting device 3 is connected to a display driving chip or a light detecting circuit in the display substrate 2, and is capable of acquiring the brightness mode corresponding to the display substrate 2 and the display brightness of the frame picture to be displayed.
Alternatively, the display substrate 2 and the screen brightness adjusting device 3 are integrally provided.
Alternatively, the display device 1 may be an Active-matrix organic light emitting diode (AMOLED) display device or a Passive organic light emitting diode (PMOLED) display device.
The advantageous effects of the display device 1 are the same as those of the screen brightness adjusting device 3 in the above embodiments, and are not described herein again.
The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present disclosure, and all the changes or substitutions should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims (10)
1. A screen brightness adjusting method is characterized by comprising the following steps:
in a first brightness mode, dividing all pixels in a screen into N pixel groups; the number of pixels in each pixel group is equal and is not overlapped, the pixels in each pixel group are uniformly distributed in the screen, each pixel group can correspondingly display a frame of picture, and N is more than or equal to 2 and is a positive integer;
taking continuously displayed N frames as a display cycle, driving pixels in the corresponding Mth pixel group to display when displaying the Mth frame in the display cycle, and simultaneously adjusting the duty ratio of a pulse width modulation signal to a first threshold, wherein N is more than or equal to M and is more than or equal to 1;
the ratio of the display brightness of the mth frame picture in the screen to the maximum display brightness of the screen is equal to the ratio of the number of pixels in the mth pixel group to the number of all pixels in the screen x the first threshold.
2. The screen brightness adjusting method according to claim 1, wherein N is 2, the 1 st pixel group includes pixels of odd lines, and the 2 nd pixel group includes pixels of even lines;
driving the pixels in the 1 st pixel group to display, including: driving the pixels of the odd lines to display line by line;
driving the pixels in the 2 nd pixel group to display, including: and driving the pixels of the even lines to display line by line.
3. The screen brightness adjusting method according to claim 1, wherein N is 2, the 1 st pixel group includes pixels of odd columns, and the 2 nd pixel group includes pixels of even columns;
driving the pixels in the 1 st pixel group to display, including: driving the pixels of the odd columns to display column by column;
driving the pixels in the 2 nd pixel group to display, including: and driving the pixels of the even columns to display column by column.
4. The screen brightness adjusting method of claim 1, wherein N-4, the 1 st pixel group comprises pixels in odd columns and odd rows, and the 2 nd pixel group comprises pixels in even columns and even rows; the 3 rd pixel group comprises pixels in even rows and odd columns, and the 4 th pixel group comprises pixels in odd rows and even columns;
driving the pixels in the 1 st pixel group to display, including: providing data signals for the pixels of the odd columns, simultaneously providing row scanning signals for the pixels of the odd rows row by row, and driving the pixels of the odd columns of the odd rows to display row by row;
driving the pixels in the 2 nd pixel group to display, including: providing data signals for the pixels of the even-numbered columns, simultaneously providing row scanning signals for the pixels of the even-numbered rows row by row, and driving the pixels of the even-numbered rows and the even-numbered columns to display row by row;
driving the pixels in the 3 rd pixel group to display, including: providing data signals for the pixels of the odd columns, simultaneously providing row scanning signals for the pixels of the even rows row by row, and driving the pixels of the odd columns of the even rows to display row by row;
driving the pixels in the 4 th pixel group to display, including: and providing data signals for the pixels of the even columns, simultaneously providing row scanning signals for the pixels of the odd rows row by row, and driving the pixels of the odd rows and the even columns to display row by row.
5. The screen brightness adjustment method according to any one of claims 1 to 4, characterized in that the screen brightness adjustment method further comprises:
in the second brightness mode, all pixels in the screen can correspondingly display one frame of picture, and the duty ratio of the pulse width modulation signal is adjusted to adjust the display brightness of the corresponding one frame of picture in the screen;
wherein the luminance of the second luminance mode is greater than the luminance of the first luminance mode.
6. The screen brightness adjustment method of claim 5, further comprising:
in a third brightness mode, all pixels in the screen can correspondingly display one frame of picture, and the power supply voltage or the data voltage is adjusted to adjust the display brightness of the corresponding one frame of picture in the screen;
wherein the luminance of the third luminance mode is greater than the luminance of the second luminance mode.
7. A screen brightness adjustment apparatus, comprising:
the display device comprises an acquisition module, a display module and a display module, wherein the acquisition module is configured to acquire a brightness mode of a screen and display brightness of a frame picture to be displayed, and the brightness mode comprises a first brightness mode;
the processing module is electrically connected with the acquisition module and configured to divide all pixels in a screen into N pixel groups in the first brightness mode, drive the pixels in the corresponding pixel groups to display according to the serial number and the display brightness of the frame picture to be displayed, and simultaneously adjust the duty ratio of the pulse width modulation signal to a first threshold value;
the number of pixels in each pixel group is equal and is not overlapped, the pixels in each pixel group are uniformly distributed in the screen, each pixel group can correspondingly display a frame of picture, and N is more than or equal to 2 and is a positive integer;
and the ratio of the display brightness of the frame picture to be displayed in the screen to the maximum display brightness of the screen is equal to the ratio of the number of the pixels in the corresponding pixel group to the number of all the pixels in the screen multiplied by the first threshold.
8. The screen brightness adjustment device of claim 7, wherein the brightness modes further comprise a second brightness mode, the brightness of the second brightness mode being greater than the brightness of the first brightness mode;
the processing module is further configured to: and in a second brightness mode, driving all pixels in the screen to display the frame picture to be displayed, and adjusting the duty ratio of the pulse width modulation signal to adjust the display brightness of the frame picture in the screen.
9. The screen brightness adjustment apparatus according to claim 8,
the brightness modes further include a third brightness mode having a brightness greater than that of the second brightness mode;
the processing module is further configured to: and in a third brightness mode, driving all pixels in the screen to display the frame picture to be displayed, and adjusting the power supply voltage or the data voltage to adjust the display brightness of the frame picture in the screen.
10. A display device, comprising: a display panel, and the screen brightness adjusting device according to any one of claims 7 to 9 electrically connected to the display panel.
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| CN111986630B (en) * | 2020-08-21 | 2021-11-12 | 维信诺科技股份有限公司 | Display brightness adjusting method and device and display device |
| CN112164373B (en) * | 2020-10-21 | 2022-07-01 | 北京京东方显示技术有限公司 | Driving method and device of display panel |
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