CN114078450A - Display driving method, display driving device, display device, and storage medium - Google Patents
Display driving method, display driving device, display device, and storage medium Download PDFInfo
- Publication number
- CN114078450A CN114078450A CN202111399811.XA CN202111399811A CN114078450A CN 114078450 A CN114078450 A CN 114078450A CN 202111399811 A CN202111399811 A CN 202111399811A CN 114078450 A CN114078450 A CN 114078450A
- Authority
- CN
- China
- Prior art keywords
- refresh rate
- time
- backlight
- picture
- sub
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 36
- 235000019557 luminance Nutrition 0.000 claims description 77
- 230000000630 rising effect Effects 0.000 claims description 28
- 238000001514 detection method Methods 0.000 claims description 12
- 230000002829 reductive effect Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 7
- 238000002834 transmittance Methods 0.000 description 20
- 238000010586 diagram Methods 0.000 description 9
- 230000008859 change Effects 0.000 description 5
- 230000003247 decreasing effect Effects 0.000 description 5
- 239000004973 liquid crystal related substance Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 208000003028 Stuttering Diseases 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- 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
- G09G3/3406—Control of illumination source
-
- 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
- G09G3/3406—Control of illumination source
- G09G3/3413—Details of control of colour illumination sources
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The embodiment of the application provides a display driving method, a display driving device, a display device and a computer readable storage medium. A display driving method comprising: acquiring a first picture refresh rate of a first period; acquiring a second picture refresh rate of a second time interval; determining a first backlight brightness according to a first picture refresh rate; determining a second backlight brightness according to the second picture refresh rate; if the second frame refresh rate is greater than the first frame refresh rate, the second backlight brightness is greater than the first backlight brightness; and if the second frame refresh rate is less than the first frame refresh rate, the second backlight brightness is less than the first backlight brightness. According to the embodiment of the application, different backlight brightness is generated for the display frames with different refresh rates, the brightness difference of the display frames with different refresh rates is reduced, flicker generated by refresh rate switching is reduced, and the display effect is improved.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a display driving method, a display driving apparatus, a display apparatus, and a computer-readable storage medium.
Background
With the advancement of science and technology, users have increasingly high requirements for fluency of films or game images in order to seek better use experience in visual effect. However, when the electronic device uses a low frame refresh rate and the user operates the application program by means of the mobile electronic device, the frame may be delayed or not smooth due to the excessive motion, which may bring a poor user experience to the user. Therefore, more and more electronic devices support higher picture refresh rates. On the other hand, if the electronic device needs to display a static picture or a picture with little change, using the higher picture refresh rate will result in higher power consumption.
Therefore, the Variable Refresh Rate (VRR) scheme can keep the Refresh Rate of the display panel consistent with the frame Rate output by the display chip card, reduce the stutter and tearing phenomena of the display picture felt by human eyes, improve the impression, especially the viewing experience of the competitive game, and is the development direction of the display technology. The electronic device dynamically adjusts the picture refresh rate according to different use scenes, so that the balance between the picture display effect and the power consumption is realized, namely the power consumption of the electronic device is reduced to the maximum extent on the basis of ensuring the picture display effect under different scenes. However, when the VRR scheme is adopted in the conventional liquid crystal display panel, the problem of different panel brightness at different frequencies exists, so that when different display refresh rates are switched, a brightness change, i.e., a flicker (flicker) phenomenon, is generated, and the visual impression of human eyes is affected.
In summary, the display device in the prior art includes: under the display frames with different refresh rates, the brightness of the display frames is different, which causes the technical problem of the flicker phenomenon.
Content of application
The present application provides a display driving method, a display driving device, a display device and a computer readable storage medium for overcoming the disadvantages of the prior art, in order to solve the problems of the prior art that: under the display frames with different refresh rates, the brightness of the display frames is different, which causes the technical problem of the flicker phenomenon.
In a first aspect, an embodiment of the present application provides a display driving method, including:
acquiring a first picture refresh rate of a first period;
acquiring a second picture refresh rate of a second time interval;
determining a first backlight brightness according to a first picture refresh rate;
determining a second backlight brightness according to the second picture refresh rate;
if the second frame refresh rate is greater than the first frame refresh rate, the second backlight brightness is greater than the first backlight brightness; and if the second frame refresh rate is less than the first frame refresh rate, the second backlight brightness is less than the first backlight brightness.
In some embodiments of the present application, obtaining the first picture refresh rate for the first period comprises: determining a first time and a second time which correspond to the rising edge or the falling edge of two frame picture signals in sequence in a first period; determining a first picture refresh rate of a first period according to an interval between a second time and a first time;
and/or, the obtaining the second picture refresh rate of the second period comprises: determining a third time and a fourth time which correspond to the rising edge or the falling edge of the two frame picture signals in sequence in a second period; and determining a second picture refresh rate of the second period according to the interval between the fourth time and the third time.
In some embodiments of the present application, determining the first backlight brightness according to the first picture refresh rate comprises: determining first sub-backlight brightness at least two moments in a first period of time according to a first picture refresh rate; in the at least two first sub-backlight luminances, the first sub-backlight luminance at the next moment is less than the first sub-backlight luminance at the previous moment.
In some embodiments of the present application, determining the second backlight brightness according to the second picture refresh rate comprises: determining second sub-backlight brightness at least two moments in a second time interval according to the second picture refresh rate; and in the at least two second sub-backlight brightnesses, the second sub-backlight brightness at the later moment is smaller than the second sub-backlight brightness at the former moment.
In a second aspect, an embodiment of the present application provides a display driving apparatus, including:
the detection module is used for acquiring a first picture refresh rate of a first time interval and acquiring a second picture refresh rate of a second time interval;
the control module is used for determining first backlight brightness according to the first picture refresh rate and determining second backlight brightness according to the second picture refresh rate;
if the second frame refresh rate is greater than the first frame refresh rate, the second backlight brightness is greater than the first backlight brightness; and if the second frame refresh rate is less than the first frame refresh rate, the second backlight brightness is less than the first backlight brightness.
In some embodiments of the present application, the detection module is configured to determine a first time and a second time that sequentially correspond to a rising edge or a falling edge of two frame picture signals within a first period; determining a first picture refresh rate of a first period according to an interval between a second time and a first time;
and/or the detection module is used for determining a third time and a fourth time which correspond to the rising edge or the falling edge of the two frame picture signals in sequence in a second period; and determining a second picture refresh rate of the second period according to the interval between the fourth time and the third time.
In some embodiments of the present application, the control module is configured to determine a first sub-backlight brightness located at least two moments within a first period of time according to a first picture refresh rate; in the at least two first sub-backlight luminances, the first sub-backlight luminance at the next moment is less than the first sub-backlight luminance at the previous moment.
In some embodiments of the present application, the control module is configured to determine a second sub-backlight brightness located at least two moments within a second period according to a second picture refresh rate; and in the at least two second sub-backlight brightnesses, the second sub-backlight brightness at the later moment is smaller than the second sub-backlight brightness at the former moment.
In a third aspect, an embodiment of the present application provides a display device, including;
a display panel;
and the controller is electrically connected with the display panel and is used for executing the display driving method in any one of the first aspect and driving the display panel to work.
In some embodiments of the present application, the controller includes a timing controller chip and a backlight controller chip, and the timing controller chip detects the first and/or second picture refresh rate and outputs the first and/or second picture refresh rate to the backlight controller chip.
In some embodiments of the present application, the timing controller chip includes a timing component that records and outputs time information to the backlight controller chip, and the backlight controller chip determines the backlight brightness according to the picture refresh rate and the time information.
In some embodiments of the present application, the controller includes a backlight controller chip that detects the first picture refresh rate and/or the second picture refresh rate.
In some embodiments of the present application, the backlight controller chip includes a timing component that records time information, and determines the backlight brightness based on the picture refresh rate and the time information.
In some embodiments of the present application, the controller includes an image processor chip and a backlight controller chip, and the image processor chip detects the first picture refresh rate and/or the second picture refresh rate and outputs to the backlight controller chip.
In a fourth aspect, embodiments of the present application provide a computer-readable storage medium for storing computer instructions, which, when executed on a computer, implement the display driving method according to any one of the first aspect.
The beneficial technical effects brought by the technical scheme provided by the embodiment of the application comprise: by generating different backlight brightness for the display frames with different refresh rates, the display frame brightness difference between different refresh rates is reduced, the flicker generated by the refresh rate switching is reduced, and the display effect is improved. Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a graph illustrating driving signal voltages, pixel voltages and display brightness in the prior art;
FIG. 2 is a graph illustrating driving signal voltages, pixel voltages and display brightness at different refresh rates in the prior art;
FIG. 3 is a schematic flow chart illustrating a display driving method according to an embodiment of the present application;
FIG. 4 is a waveform diagram of backlight brightness-display brightness in one embodiment of the present application;
FIGS. 5A-5C are schematic diagrams illustrating the waveforms of PWM signal-backlight luminance according to an embodiment of the present application;
FIG. 6 is a schematic structural diagram of a display driving apparatus according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts or parts having the same or similar functions throughout. In addition, if a detailed description of the known art is not necessary for illustrating the features of the present application, it is omitted. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
As shown in fig. 1 and fig. 2, fig. 1 is a graph illustrating a driving signal voltage, a pixel voltage and a display luminance in the prior art, and fig. 2 is a graph illustrating a driving signal voltage, a pixel voltage and a display luminance at different refresh rates in the prior art.
The applicant of the present application has studied and found that, in the prior art, a backlight module emits light with a certain brightness under the control of a backlight controller chip, a data driving chip inputs display driving signals (data) to data lines of a display panel and writes display data to display pixels line by line in cooperation with a gate driving circuit, and the liquid crystal transmittance of the pixels, that is, the brightness of the pixels, is controlled to realize image display. The voltage polarity of a data line signal (data) of the driving panel is inverted frame by frame relative to a reference Voltage (VCOM), and correspondingly, the voltage polarity of each pixel point (pixel) is inverted frame by frame relative to the polarity of the reference voltage, so that the problem of residual image caused by polarization of liquid crystal due to the same polarity for a long time is solved. During frame switching, the polarity of the driving signal voltage is reversed relative to the reference voltage, so that the absolute value of the difference between the voltage of the pixel point and the reference voltage changes from large → small → large. In the current mainstream liquid crystal display mode (FFS, IPS, VA), the transmittance of the display panel is determined by the voltage difference between the voltage of the pixel and the reference voltage, and the larger the absolute value of the difference is, the higher the transmittance is. Therefore, during frame switching, the transmittance of the panel changes from large → small → large, and the diagram is shown in fig. 1. For a fixed backlight brightness BL, the display brightness L is linearly proportional to the transmittance Tr%: l ═ BL × Tr%. The higher the frequency, the greater the number of changes in transmittance from large → small → large within the same time for different refresh frequencies, while considering the shorter the reaction time obtained for the liquid crystal, the lower the average transmittance, as shown in fig. 2. When the same picture is displayed, the refreshing frequency is changed, and human eyes can feel the brightness change, namely the picture flickering phenomenon, because the brightness is inconsistent under different frequencies.
The present application provides a display driving method, a display driving apparatus, a display apparatus and a computer readable storage medium, which are intended to solve the above technical problems in the prior art. The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments.
As shown in fig. 3, fig. 3 is a schematic flow chart of a display driving method according to an embodiment of the present application.
In a first aspect, an embodiment of the present application provides a display driving method, including steps S1-S4:
s1, obtaining the first picture refresh rate f1 of the first period T1.
S2, the second picture refresh rate f2 of the second period T2 is acquired.
S3, determining the first backlight brightness L1 according to the first picture refresh rate f 1.
And S4, determining a second backlight brightness L2 according to the second picture refresh rate f 2.
If the second frame refresh rate f2 is greater than the first frame refresh rate f1, the second backlight luminance L2 is greater than the first backlight luminance L1; if the second frame refresh rate f2 is less than the first frame refresh rate f1, the second backlight luminance L2 is less than the first backlight luminance L1.
According to the display driving method provided by the embodiment of the application, different backlight brightness is generated for the pictures with different refresh rates, the brightness difference of the display pictures with different refresh rates is reduced, flicker generated by refresh rate switching is reduced, and the display effect is improved.
As shown in fig. 4 and fig. 5A-5C, fig. 4 is a waveform diagram of backlight brightness-display brightness in an embodiment of the present application, and fig. 5A-5C are waveform diagrams of pulse width modulation signal-backlight brightness in an embodiment of the present application.
In the present embodiment, since the second screen refresh rate f2 > the first screen refresh rate f1 in the second relatively later period T2 is greater than the first relatively earlier period T1, the high level width of the pixel voltage is decreased from large, the average value of the absolute value of the voltage difference between the pixel voltage and the reference voltage is decreased from large, the panel transmittance Tr% is also decreased from large, and the panel transmittance Tr% 2 in the second period T2 is less than the panel transmittance Tr% 1 in the first period T1.
As can be seen from the formula, the backlight luminance BL and the transmittance Tr% together determine the display luminance L: l ═ BL × Tr%. In order to maintain the uniformity of the display brightness L, in the present embodiment, the backlight brightness BL is adjusted to balance the variation of the panel transmittance Tr%, and when the panel transmittance Tr% is decreased from large to small, the backlight brightness BL is increased from small to large, and the second backlight brightness L2 > the first backlight brightness L1.
As shown in FIG. 4, at different screen refresh rates, f1 < f2 < f3 and f3 > f4, Tr% 1 > Tr% 2 > Tr% 3 and Tr% 3 < Tr% 4. If the four frames are displayed with the same backlight brightness BL, the difference of the display brightness L is large. By adjusting the backlight brightness BL to make BL1 < BL2 < BL3 and BL3 > BL4, the difference between the display brightness L of the four pictures is reduced or eliminated, and the uniformity of the display pictures is greatly improved.
When the second frame refresh rate f2 is smaller than the first frame refresh rate f1, the adjustment method is the same as the above embodiment, the panel transmittance Tr% is increased from small to large, the backlight brightness BL is decreased from large to small, and the second backlight brightness L2 is smaller than the first backlight brightness L1.
The backlight brightness BL is the high level width W of the pwm signal, and the backlight brightness BL is desirably set to the frequency variation Δ F, and in practical applications, the coefficients of a plurality of specific frequency points are obtained by using a Look-Up Table (LUT) lookup manner, and other intermediate frequencies are obtained by using difference calculation.
As shown in fig. 5A to 5C, in combination with the above formulas, the display driving method provided in the embodiment of the present application further includes: the high level width of the pulse width modulation signal is determined according to the picture refreshing rate f, the backlight brightness BL is larger when the high level width of the pulse width modulation signal is larger, and vice versa, the backlight brightness BL is smaller when the high level width of the pulse width modulation signal is smaller. In one embodiment, the second picture refresh rate f2 < the first picture refresh rate f1, the high level width of the second pwm signal in the second period T2 < the high level width of the first pwm signal in the first period T1, thereby achieving the second backlight luminance BL2 in the second period T2 < the first backlight luminance BL1 in the first period T1. On the contrary, in another embodiment, when the second frame refresh rate f2 > the first frame refresh rate f1, the high level width of the pwm signal is increased, and the backlight brightness BL is also increased.
In one embodiment of the present application, the step of obtaining the first picture refresh rate f1 of the first period T1 includes:
the first time T1 and the second time T2, to which the rising edge or the falling edge of the picture signal of two frames within the first period T1 corresponds in turn, are determined.
The first screen refresh rate f1 of the first period T1 is determined according to the interval Δ T1 between the second time T2 and the first time T1.
In another embodiment of the present application, the step of obtaining the second picture refresh rate f2 for the second period T2 includes:
the third time T3 and the fourth time T4 at which the rising edge or the falling edge of the picture signal of two frames within the second period T2 correspond in order are determined.
The second screen refresh rate f2 of the second period T2 is determined according to the interval Δ T2 between the fourth time T4 and the third time T3.
In another embodiment of the present application, the display driving method includes acquiring the first screen refresh rate f1 for the first time period T1, and then acquiring the second screen refresh rate f2 for the second time period T2: the first time T1 and the second time T2, to which the rising edge or the falling edge of the picture signal of two frames within the first period T1 corresponds in turn, are determined.
The first screen refresh rate f1 of the first period T1 is determined according to the interval Δ T1 between the second time T2 and the first time T1.
The third time T3 and the fourth time T4 at which the rising edge or the falling edge of the picture signal of two frames within the second period T2 correspond in order are determined.
The second screen refresh rate f2 of the second period T2 is determined according to the interval Δ T2 between the fourth time T4 and the third time T3.
In one embodiment, a first time T1 and a second time T2 corresponding to the rising edges of any two frames of picture signals in sequence in the first period T1 are obtained first, and the first time T1 and the second time T2 may be adjacent frames or interval frames; the second calculation yields the interval Δ t1 between the first time t1 and the second time t 2. The frame refresh rate f and the time interval Δ t satisfy the formula f N/Δ t, where N is the number of frames between the first time t1 and the second time t2, and if the frames are adjacent, N is 1, and the first frame refresh rate f1 is calculated by the formula.
In another embodiment, the first time T1 and the second time T2 corresponding to the falling edges of the picture signals of any two frames in the first period T1 are obtained first, and the first picture refresh rate f1 can be calculated according to the formula as well. In the above embodiment, detecting either one of the rising edge and the falling edge of the two frame picture signals can derive the first picture refresh rate f 1. However, it is understood that, in some embodiments, since the rising edge of the picture signal occurs earlier in time than the falling edge, detecting the rising edge of the picture signal for two frames may result in the first picture refresh rate f1 earlier than detecting the falling edge; in another embodiment, the operation difficulty of detecting the rising edge of the two frame image signals is greater, and the first image refresh rate f1 can be calculated by a simpler process and at a lower cost.
Similarly, in another embodiment, the second picture refresh rate f2 of the second period T2 can be calculated by the method described above. In yet another embodiment, the first picture refresh rate f1 of the first period T1 and the second picture refresh rate f2 of the second period T2 are calculated by the above method, which will not be described herein.
In one embodiment of the present application, determining the first backlight luminance L1 according to the first picture refresh rate f1 comprises: according to the first screen refresh rate f1, a first sub-backlight luminance L11 at least two time instants within the first period T1 is determined, and of the at least two first sub-backlight luminances L11, the first sub-backlight luminance L11 at the latter time instant is smaller than the first sub-backlight luminance L11 at the former time instant.
In another embodiment of the present application, the determining the second backlight luminance L2 according to the second picture refresh rate f2 comprises: the second sub-backlight luminance L21 at least two times during the second period T2 is determined according to the second picture refresh rate f2, and the second sub-backlight luminance L21 at the latter time is less than the second sub-backlight luminance L21 at the former time.
In another embodiment of the present application, the display driving method includes determining the first backlight luminance L1 according to the first picture refresh rate f1, and determining the second backlight luminance L2 according to the second picture refresh rate f 2:
according to the first picture refresh rate f1, a first sub-backlight luminance L11 at least two moments within the first period T1 is determined, and the first sub-backlight luminance L21 at the latter moment is smaller than the first sub-backlight luminance L11 at the former moment.
The second sub-backlight luminance L21 at least two times during the second period T2 is determined according to the second picture refresh rate f2, and the second sub-backlight luminance L21 at the latter time is less than the second sub-backlight luminance L21 at the former time.
Further study on the relationship between the backlight luminance BL and the display luminance L revealed that the panel transmittance Tr% increases with the increase in the operating time at the same screen refresh rate. In order to maintain the uniformity of the display luminance L, the panel transmittance Tr% increases and the backlight luminance BL decreases.
In one embodiment, since the first screen refresh rate f1 is maintained for the first period T1, and the panel transmittance Tr% is continuously increased for the first period T1, at least two moments in the first period T1 are determined, wherein the two moments may be the first moment T1 and the second moment T2 in the above-mentioned embodiment, or any other two different moments. The first sub backlight luminance L11 at the latter time is less than the first sub backlight luminance L11 at the former time.
In another embodiment, the second frame refresh rate f2 is maintained during the second time period T2, the panel transmittance Tr% is increased, and at least two moments in the second time period T2 are determined, which may be the third moment T3, the fourth moment T4, or other moments. The second sub backlight luminance L21 at the latter timing < the second sub backlight luminance L21 at the former timing.
Based on the same application concept, in a second aspect, the embodiment of the present application provides a display driving apparatus 1. As shown in fig. 6, fig. 6 is a schematic structural diagram of a display driving apparatus according to an embodiment of the present application. The display drive device 1 includes: a detection module 11 and a control module 12.
The detecting module 11 is used for obtaining a first picture refresh rate f1 of the first time period T1 and obtaining a second picture refresh rate f2 of the second time period T2.
The control module 12 determines a first backlight brightness BL1 according to the first picture refresh rate f1 and determines a second backlight brightness BL2 according to the second picture refresh rate f 2;
if the second frame refresh rate f2 is greater than the first frame refresh rate f1, the second backlight luminance BL2 is greater than the first backlight luminance BL 1; if the second frame refresh rate f2 is less than the first frame refresh rate f1, the second backlight luminance BL2 is less than the first backlight luminance BL 1.
In an embodiment of the present application, the detecting module 11 is configured to determine a first time T1 and a second time T2 corresponding to a rising edge or a falling edge of the two-frame picture signal in the first period T1; determining a first picture refresh rate f1 of the first period T1 according to an interval Δ T1 between the second time T2 and the first time T1;
in another embodiment of the present application, the detecting module 11 is configured to determine a third time T3 and a fourth time T4 corresponding to the rising edge or the falling edge of the two-frame picture signal in the second time period T2; the second screen refresh rate f2 of the second period T2 is determined according to the interval Δ T2 between the fourth time T4 and the third time T3.
In another embodiment of the present application, the detecting module 11 is configured to determine a first time T1 and a second time T2 corresponding to the rising edge or the falling edge of the two-frame picture signal in sequence within the first period T1, and determine a third time T3 and a fourth time T corresponding to the rising edge or the falling edge of the two-frame picture signal in sequence within the second period T2.
The first picture refresh rate f1 of the first period T1 is determined according to the interval Δ T1 between the second time T2 and the first time T1, and the second picture refresh rate f2 of the second period T2 is determined according to the interval Δ T2 between the fourth time T4 and the third time T3.
In an embodiment of the present application, the control module 12 is configured to determine the first sub-backlight luminance L11 at least two moments within the first period T1 according to the first picture refresh rate f 1; among the at least two first sub backlight luminances L11, the first sub backlight luminance L11 at the latter time is less than the first sub backlight luminance L11 at the former time.
In another embodiment of the present application, the control module 12 is configured to determine the second sub-backlight luminance L21 at least two moments in time within the second time period T2 according to the second picture refresh rate f 2; among the at least two second sub backlight luminances L21, the second sub backlight luminance L21 at the latter timing is smaller than the second sub backlight luminance L21 at the former timing.
In another embodiment of the present application, the control module 12 is configured to determine a first sub-backlight luminance at least two moments in time within a first period according to the first picture refresh rate f1, and determine a second sub-backlight luminance at least two moments in time within a second period according to the second picture refresh rate; in the at least two first sub-backlight luminances, a first sub-backlight luminance at a later time is less than a first sub-backlight luminance at a previous time, and in the at least two second sub-backlight luminances, a second sub-backlight luminance at the later time is less than a second sub-backlight luminance at the previous time.
Based on the same application concept, in a third aspect, embodiments of the present application provide a display device. As shown in fig. 7, fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present application. The display device includes; a display panel 2 and a controller 3.
The controller 3 is electrically connected to the display panel 2, and is configured to execute the display driving method according to any one of the first aspect above to drive the display panel 2 to operate.
In some embodiments of the present application, the controller 3 includes a timing controller chip 301 and a backlight controller chip 302, and the timing controller chip 301 detects the first picture refresh rate f1 and/or the second picture refresh rate f2 and outputs to the backlight controller chip 302. The timing controller chip 301 corresponds to the detection module 11 in the above embodiment, and the backlight controller chip 302 corresponds to the control module 12 in the above embodiment.
In this embodiment, the timing controller chip 301 receives display data signals (data) as indicated by black arrows in the figure and outputs the display data signals to the data driving chip 303, the data driving chip 303 cooperates with the gate driving circuit to write display data to the pixel regions row by row through the gate lines, and the backlight controller chip 302 receives backlight signals as indicated by white arrows in the figure and outputs corresponding pulse width modulation signals to the display panel, so as to realize image display. The timing controller chip 301 detects that the rising edges of any two frames of picture signals in the first period T1 correspond to the first time T1 and the second time T2 in sequence, and calculates the first picture refresh rate f1 according to the interval between the first time T1 and the second time T2. Similarly, the timing controller chip 301 can also calculate a second picture refresh rate f2 by detecting a third time T3 and a fourth time T4 within the second period T2.
In another embodiment, the first time T1 and the second time T2 correspond to falling edges of arbitrary two frame picture signals within the first period T1, and the third time T3 and the fourth time T4 correspond to falling edges of arbitrary two frame picture signals within the second period T2.
In still another embodiment, the first time T1 and the second time T2 correspond to a rising edge of any two frame picture signals within the first period T1, and the third time T3 and the fourth time T4 correspond to a falling edge of any two frame picture signals within the second period T2.
In still another embodiment, the first time T1 and the second time T2 correspond to a falling edge of any two frame picture signals within the first period T1, and the third time T3 and the fourth time T4 correspond to a rising edge of any two frame picture signals within the second period T2.
In some embodiments of the present application, the timing controller chip 301 includes a timing component, the timing component records time information and outputs the time information to the backlight controller chip 302, and the backlight controller chip 302 determines the backlight brightness BL according to the picture refresh rate f and the time information.
In the present embodiment, it is further studied that the panel transmittance increases with time at the same screen refresh rate f. Therefore, the detection module 11 records the time information and outputs the time information to the control module 12, so that the uniformity of the picture at the same picture refresh rate f can be further adjusted.
In some embodiments of the present application, the controller 3 includes a backlight controller chip 302, and the backlight controller chip 302 detects the first picture refresh rate f1 and/or the second picture refresh rate f 2. In this embodiment, the backlight controller chip 302 has high integration and is multiplexed into the detection module 11 and the control module 12.
In the present embodiment, the backlight controller chip 302 detects the first time t1 and the second time t2, and the third time t3 and the fourth time t 4. In one embodiment, the first time T1 and the second time T2 both correspond to a rising edge or a falling edge of the two frame picture signals in the first time period T1, and the third time T3 and the fourth time T4 both correspond to a rising edge or a falling edge of the two frame picture signals in the second time period T2, but in different embodiments, the first time T1 and the third time T3 may both correspond to a rising edge or a falling edge, and may also correspond to a rising edge and a falling edge, respectively.
In some embodiments of the present application, the backlight controller chip 302 includes a timing component that records time information, and the backlight controller chip 302 determines the backlight brightness according to the picture refresh rate f and the time information.
In the present embodiment, the backlight controller chip 302 is multiplexed into the detection module 11 and the control module 12, and the backlight controller chip 12 records time information and outputs a pulse width modulation signal according to the picture refresh rate and the time information to determine the backlight brightness.
In some embodiments of the present application, the controller includes an image processor chip that detects the first picture refresh rate f1 and/or the second picture refresh rate f2 and outputs to the backlight controller chip 302, and the backlight controller chip 302.
In this embodiment, the image processor chip (not shown) corresponds to the detection module 11, and the backlight controller chip 302 corresponds to the control module 12.
In this embodiment, the image processor chip needs to actively process the image signal and send out frame by frame. Unlike the passive reception of image signals by the timing controller chip and the backlight controller chip, the image processor chip can only detect the falling edge of two frame image signals. That is, in the present embodiment, the first time T1 and the second time T2 correspond to the falling edge of the two frame picture signal in the first period T1, and the third time T3 and the fourth time T4 correspond to the falling edge of the two frame picture signal in the second period T2.
Based on the same application concept, in a fourth aspect, an embodiment of the present application provides a computer-readable storage medium for storing computer instructions, which, when executed on a computer, implement the display driving method according to any one of the first aspects described above.
By applying the embodiment of the application, at least the following beneficial effects can be realized: on one hand, the display driving method reduces the display image brightness difference among different refresh rates by generating different backlight brightness for images with different refresh rates, reduces the flicker generated by refresh rate switching and improves the display effect; on the other hand, the backlight brightness is correspondingly adjusted according to the change of the transmittance of the display panel under different working time, so that the change range of the brightness of the display picture along with the time is reduced.
Those of skill in the art will appreciate that the various operations, methods, steps in the processes, acts, or solutions discussed in this application can be interchanged, modified, combined, or eliminated. Further, other steps, measures, or schemes in various operations, methods, or flows that have been discussed in this application can be alternated, altered, rearranged, broken down, combined, or deleted. Further, steps, measures, schemes in the prior art having various operations, methods, procedures disclosed in the present application may also be alternated, modified, rearranged, decomposed, combined, or deleted.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and may be performed in other orders unless explicitly stated herein. Moreover, at least a portion of the steps in the flow chart of the figure may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed alternately or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.
Claims (15)
1. A display driving method, comprising:
acquiring a first picture refresh rate of a first period;
acquiring a second picture refresh rate of a second time interval;
determining a first backlight brightness according to the first picture refresh rate;
determining a second backlight brightness according to the second picture refresh rate;
if the second frame refresh rate is greater than the first frame refresh rate, the second backlight brightness is greater than the first backlight brightness; and if the second frame refresh rate is less than the first frame refresh rate, the second backlight brightness is less than the first backlight brightness.
2. The display driving method according to claim 1, wherein the obtaining the first picture refresh rate for the first period comprises: determining a first time and a second time which correspond to the rising edge or the falling edge of two frame picture signals in sequence in a first period; determining a first picture refresh rate of the first time interval according to an interval between the second time and the first time;
and/or the obtaining of the second picture refresh rate of the second time interval comprises: determining a third time and a fourth time which correspond to the rising edge or the falling edge of the two frame picture signals in sequence in a second period; and determining a second picture refresh rate of the second time interval according to the interval between the fourth time and the third time.
3. The method of claim 1, wherein determining the first backlight brightness according to the first picture refresh rate comprises: determining first sub-backlight brightness at least two moments in the first time interval according to the first picture refresh rate; in the at least two first sub-backlight luminances, the first sub-backlight luminance at a later time is smaller than the first sub-backlight luminance at a previous time.
4. The display driving method according to claim 1, wherein the determining a second backlight brightness according to the second picture refresh rate comprises: determining second sub-backlight brightness at least two moments in the second time interval according to the second picture refresh rate; in the at least two second sub-backlight luminances, the second sub-backlight luminance at a later time is smaller than the second sub-backlight luminance at a previous time.
5. A display driving apparatus, comprising:
the device comprises a detection module, a display module and a control module, wherein the detection module is used for acquiring a first picture refresh rate of a first time interval and acquiring a second picture refresh rate of a second time interval;
the control module is used for determining first backlight brightness according to the first picture refresh rate and determining second backlight brightness according to the second picture refresh rate;
if the second frame refresh rate is greater than the first frame refresh rate, the second backlight brightness is greater than the first backlight brightness; and if the second frame refresh rate is less than the first frame refresh rate, the second backlight brightness is less than the first backlight brightness.
6. The display driving device according to claim 5, wherein the detecting module is configured to determine a first time and a second time corresponding to a rising edge or a falling edge of the two-frame picture signal in the first period in sequence; determining a first picture refresh rate of the first time interval according to an interval between the second time and the first time;
and/or the detection module is used for determining a third time and a fourth time which correspond to the rising edge or the falling edge of the two frame picture signals in sequence in a second period; and determining a second picture refresh rate of the second time interval according to the interval between the fourth time and the third time.
7. The display driving apparatus according to claim 5, wherein the control module is configured to determine a first sub-backlight luminance at least two moments in the first period according to the first picture refresh rate; in the at least two first sub-backlight luminances, the first sub-backlight luminance at a later time is smaller than the first sub-backlight luminance at a previous time.
8. The display driving apparatus according to claim 5, wherein the control module is configured to determine a second sub-backlight luminance at least two moments in the second period according to the second picture refresh rate; in the at least two second sub-backlight luminances, the second sub-backlight luminance at a later time is smaller than the second sub-backlight luminance at a previous time.
9. A display device, comprising:
a display panel;
a controller electrically connected to the display panel for executing the display driving method according to any one of claims 1 to 4 to drive the display panel to operate.
10. The display device according to claim 9, wherein the controller includes a timing controller chip and a backlight controller chip, and the timing controller chip detects the first and/or second picture refresh rate and outputs the detected picture refresh rate to the backlight controller chip.
11. The display device according to claim 10, wherein the timing controller chip includes a timing component that records time information and outputs the time information to the backlight controller chip, and the backlight controller chip determines the backlight luminance based on the picture refresh rate and the time information.
12. The display device according to claim 9, wherein the controller comprises a backlight controller chip that detects the first picture refresh rate and/or the second picture refresh rate.
13. The display device according to claim 12, wherein the backlight controller chip includes a timing component that records time information, the backlight controller chip determining the backlight brightness according to the picture refresh rate and the time information.
14. The display device according to claim 9, wherein the controller comprises an image processor chip and the backlight controller chip, and the image processor chip detects the first picture refresh rate and/or the second picture refresh rate and outputs the detected picture refresh rate to the backlight controller chip.
15. A computer-readable storage medium for storing computer instructions for implementing a display driving method according to any one of claims 1 to 4 when the computer instructions are run on a computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111399811.XA CN114078450A (en) | 2021-11-19 | 2021-11-19 | Display driving method, display driving device, display device, and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111399811.XA CN114078450A (en) | 2021-11-19 | 2021-11-19 | Display driving method, display driving device, display device, and storage medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114078450A true CN114078450A (en) | 2022-02-22 |
Family
ID=80284315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111399811.XA Pending CN114078450A (en) | 2021-11-19 | 2021-11-19 | Display driving method, display driving device, display device, and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114078450A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116030768A (en) * | 2023-01-12 | 2023-04-28 | 北京显芯科技有限公司 | Light-emitting substrate, driving method thereof and display device |
| WO2023231721A1 (en) * | 2022-05-31 | 2023-12-07 | 京东方科技集团股份有限公司 | Display module and control method therefor, and display apparatus |
| WO2024020740A1 (en) * | 2022-07-25 | 2024-02-01 | 京东方科技集团股份有限公司 | Backlight module and driving method therefor, and display panel and display apparatus |
| WO2024077609A1 (en) * | 2022-10-14 | 2024-04-18 | 深圳Tcl新技术有限公司 | Backlight brightness control method and apparatus, terminal device, and storage medium |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010038369A1 (en) * | 2000-03-29 | 2001-11-08 | Takako Adachi | Liquid crystal display device |
| JP2008304661A (en) * | 2007-06-07 | 2008-12-18 | Sony Corp | Display device and display method |
| CN102592554A (en) * | 2011-01-17 | 2012-07-18 | 刘鸿达 | Liquid crystal display device having a plurality of pixel electrodes |
| CN104299602A (en) * | 2014-08-28 | 2015-01-21 | 京东方科技集团股份有限公司 | Backlight compensation method, backlight source and display device |
| CN110491351A (en) * | 2019-09-27 | 2019-11-22 | 京东方科技集团股份有限公司 | A kind of driving method of display panel, its driving device and display device |
| CN111354323A (en) * | 2020-04-26 | 2020-06-30 | 成都中电熊猫显示科技有限公司 | Display panel brightness control method and display device |
| CN111429850A (en) * | 2020-04-08 | 2020-07-17 | 深圳市华星光电半导体显示技术有限公司 | Display panel and display method thereof |
| CN112927658A (en) * | 2021-01-26 | 2021-06-08 | 昆山龙腾光电股份有限公司 | Driving method and driving device of display panel and display device |
| CN113438458A (en) * | 2021-06-11 | 2021-09-24 | 屏丽科技(深圳)有限公司 | Method for optimizing initial brightness of time sequence color mixing liquid crystal projection |
-
2021
- 2021-11-19 CN CN202111399811.XA patent/CN114078450A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010038369A1 (en) * | 2000-03-29 | 2001-11-08 | Takako Adachi | Liquid crystal display device |
| JP2008304661A (en) * | 2007-06-07 | 2008-12-18 | Sony Corp | Display device and display method |
| CN102592554A (en) * | 2011-01-17 | 2012-07-18 | 刘鸿达 | Liquid crystal display device having a plurality of pixel electrodes |
| CN104299602A (en) * | 2014-08-28 | 2015-01-21 | 京东方科技集团股份有限公司 | Backlight compensation method, backlight source and display device |
| CN110491351A (en) * | 2019-09-27 | 2019-11-22 | 京东方科技集团股份有限公司 | A kind of driving method of display panel, its driving device and display device |
| CN111429850A (en) * | 2020-04-08 | 2020-07-17 | 深圳市华星光电半导体显示技术有限公司 | Display panel and display method thereof |
| CN111354323A (en) * | 2020-04-26 | 2020-06-30 | 成都中电熊猫显示科技有限公司 | Display panel brightness control method and display device |
| CN112927658A (en) * | 2021-01-26 | 2021-06-08 | 昆山龙腾光电股份有限公司 | Driving method and driving device of display panel and display device |
| CN113438458A (en) * | 2021-06-11 | 2021-09-24 | 屏丽科技(深圳)有限公司 | Method for optimizing initial brightness of time sequence color mixing liquid crystal projection |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023231721A1 (en) * | 2022-05-31 | 2023-12-07 | 京东方科技集团股份有限公司 | Display module and control method therefor, and display apparatus |
| WO2024020740A1 (en) * | 2022-07-25 | 2024-02-01 | 京东方科技集团股份有限公司 | Backlight module and driving method therefor, and display panel and display apparatus |
| WO2024077609A1 (en) * | 2022-10-14 | 2024-04-18 | 深圳Tcl新技术有限公司 | Backlight brightness control method and apparatus, terminal device, and storage medium |
| CN116030768A (en) * | 2023-01-12 | 2023-04-28 | 北京显芯科技有限公司 | Light-emitting substrate, driving method thereof and display device |
| CN116030768B (en) * | 2023-01-12 | 2024-06-07 | 北京显芯科技有限公司 | Light-emitting substrate, driving method thereof and display device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114078450A (en) | Display driving method, display driving device, display device, and storage medium | |
| CN108335677B (en) | Luminance compensation method, luminance compensation device, and display device | |
| US9672792B2 (en) | Display device and driving method thereof | |
| JP4201026B2 (en) | Liquid crystal display device and driving method of liquid crystal display device | |
| US7106350B2 (en) | Display method for liquid crystal display device | |
| EP2262272B1 (en) | Control of a multi-view display system using shutter glasses | |
| US8648780B2 (en) | Motion adaptive black data insertion | |
| JP5105778B2 (en) | Driving device and driving method for liquid crystal display device | |
| US20110157260A1 (en) | 3d image display device | |
| JP6004344B2 (en) | Hold-type image display system | |
| US9202419B2 (en) | Liquid crystal display and method of driving the same | |
| US7667720B2 (en) | Image display device, driving circuit and driving method used in same | |
| KR101324361B1 (en) | Liquid Crystal Display | |
| EP2450740A1 (en) | Liquid crystal display device and light source control method | |
| JP2006189661A (en) | Image display apparatus and method thereof | |
| JP2002251175A (en) | Time-sharing system liquid crystal display device and its color video display method | |
| JP2002323876A (en) | Picture display method in liquid crystal display and liquid crystal display device | |
| KR20160015451A (en) | Method of driving display panel and display apparatus for performing the method | |
| JP2006084710A (en) | Display control circuit, display control method, and liquid crystal display | |
| TW201120859A (en) | Liquid crystal display | |
| US8830281B2 (en) | Circuit for compensating color shift of a color sequential display method and method thereof | |
| CN115472138B (en) | Gamma voltage regulating method, driving circuit and display device | |
| CN114283750A (en) | Display device and display method thereof | |
| US9779673B2 (en) | Display and backlight controller and display system using the same | |
| CN114913821B (en) | Display module, control method thereof and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220222 |