CN110136645B - Display driving method and device of display panel and display device - Google Patents
Display driving method and device of display panel and display device Download PDFInfo
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- CN110136645B CN110136645B CN201910403306.4A CN201910403306A CN110136645B CN 110136645 B CN110136645 B CN 110136645B CN 201910403306 A CN201910403306 A CN 201910403306A CN 110136645 B CN110136645 B CN 110136645B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—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]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
Abstract
The invention discloses a display driving method, a display driving device and a display device of a display panel, wherein the driving method comprises the steps of obtaining the current display gray scale value of a light-emitting unit; acquiring a gray scale value to be displayed of the light-emitting unit; comparing the current display gray scale value with the to-be-displayed gray scale value, and determining a transition display gray scale value according to the to-be-displayed gray scale value and the current display gray scale value when the absolute value of the difference value between the current display gray scale value and the to-be-displayed gray scale value is greater than a set threshold value; when the display of the current display gray scale value is finished, driving the light-emitting unit to display the transition display gray scale value within a preset time; after the transitional display gray scale value is displayed, driving the light-emitting unit to display the gray scale value to be displayed; the transitional display gray scale value is a display gray scale between the current display gray scale value and the gray scale value to be displayed; the problem of brightness deviation when the gray scale value to be displayed is directly displayed is avoided.
Description
Technical Field
Embodiments of the present invention relate to display technologies, and in particular, to a display driving method, a display driving apparatus, and a display apparatus for a display panel.
Background
The display panel has a wide application in modern electronic devices, and an Organic Light-Emitting Diode (OLED) has advantages of self-luminescence, wide viewing angle, and the like, and has an important application in the display panel.
However, in the display process of the OLED display panel, the display screen is prone to have brightness deviation, and the display effect of the display panel is seriously affected.
Disclosure of Invention
The invention provides a display driving method, a display driving device and a display device of a display panel, which are used for reducing brightness deviation in the display process of the display panel.
In a first aspect, an embodiment of the present invention provides a display driving method for a display panel, where the display panel includes at least one light emitting unit, the method including:
acquiring a current display gray scale value of the light-emitting unit;
acquiring a gray scale value to be displayed of the light-emitting unit;
comparing the current display gray scale value with the to-be-displayed gray scale value, and determining a transition display gray scale value according to the to-be-displayed gray scale value and the current display gray scale value when the absolute value of the difference value between the current display gray scale value and the to-be-displayed gray scale value is greater than a set threshold value;
when the display of the current display gray scale value is finished, driving the light-emitting unit to display the transition display gray scale value within a preset time;
after the transitional display gray scale value is displayed, driving the light-emitting unit to display the gray scale value to be displayed; and the transitional display gray scale value is a display gray scale between the current display gray scale value and the gray scale value to be displayed.
Optionally, determining a transitional display gray scale value according to the to-be-displayed gray scale value and the current display gray scale value includes:
determining the transitional display gray scale value according to the corresponding relation between the gray scale of the light-emitting unit and the actual display brightness;
the corresponding relation between the gray scale and the actual display brightness comprises an actual display brightness change curve when the current display gray scale value of the light-emitting unit is switched to the gray scale value to be displayed.
Optionally:
and in the preset time, the difference value between the actual display brightness corresponding to the transitional display gray scale value and the target display brightness corresponding to the gray scale value to be displayed is smaller than a set brightness threshold value.
Optionally, driving the light emitting unit to display the transition gray scale value within a preset time includes:
determining N sub-time periods and N middle display gray-scale values which are in one-to-one correspondence with the N sub-time periods;
driving the light emitting unit to sequentially display the N intermediate display gray scale values;
and N is an integer greater than or equal to 2, and the sum of the N sub-time periods is equal to the preset time.
Optionally, the N sub-periods are not equal.
Optionally:
and sequentially reducing or increasing the N middle display gray-scale values corresponding to the N sub-time periods.
Optionally, the light emitting unit is a red light emitting unit, a green light emitting unit, or a blue light emitting unit.
In a second aspect, an embodiment of the present invention further provides a display driving apparatus, including: the first acquisition unit is used for acquiring the current display gray scale value of the light-emitting unit;
the second acquisition unit is used for acquiring the gray scale value to be displayed of the light-emitting unit;
the processing unit is used for comparing the current display gray scale value with the to-be-displayed gray scale value, and when the absolute value of the difference value between the current display gray scale value and the to-be-displayed gray scale value is larger than a set threshold, determining a transitional display gray scale value according to the to-be-displayed gray scale value and the current display gray scale value;
the first display unit is used for driving the light-emitting unit to display the transitional display gray scale value within preset time when the display of the current display gray scale value is finished;
the second display unit is used for driving the light-emitting unit to display the gray scale value to be displayed after the transitional display gray scale value is displayed; and the transitional display gray scale value is a display gray scale between the current display gray scale value and the gray scale value to be displayed.
In a third aspect, an embodiment of the present invention further provides a display device, including a display panel and the display driving device according to the second aspect.
Optionally, the display panel is an organic light emitting diode OLED display panel.
The display driving method of the display panel, provided by the embodiment of the invention, includes the steps of firstly obtaining a current display gray scale value of the light-emitting unit, obtaining a to-be-displayed gray scale value of the light-emitting unit, determining a transition display gray scale value when an absolute value of a difference value between the current display gray scale value and the to-be-displayed gray scale value is larger than a set threshold value, displaying the transition display gray scale value within preset time, and displaying the to-be-displayed gray scale value after the transition display gray scale value is displayed, so that the problem of brightness deviation when the to-be-displayed gray scale value is directly displayed is solved.
Drawings
Fig. 1 is a flowchart of a display driving method of a display panel according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a display driving method of a display panel according to another embodiment of the present invention;
FIG. 3 is a flowchart illustrating a display driving method of a display panel according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of a display driving apparatus according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
As mentioned in the background art, the OLED display panel has a problem of brightness deviation during the picture display process, and the inventors have studied to find that the reason for the problem is: hysteresis effects of the drive transistors in the pixel drive circuit. When the display panel is switched from the previous display gray scale to the next display gray scale which has a larger difference with the previous display gray scale due to the hysteresis effect of the driving transistor, a picture of the previous display gray scale is remained on the display panel in a short time, namely, the display picture has brightness deviation. In order to solve the above technical problem, the present application provides the following solutions:
fig. 1 is a flowchart of a display driving method of a display panel according to an embodiment of the present invention, where the display panel includes at least one light emitting unit, and the display driving method of the display panel includes:
Specifically, the currently displayed gray scale value of the light emitting unit is the gray scale value currently being displayed by the light emitting unit.
And 102, acquiring a gray scale value to be displayed of the light-emitting unit.
Specifically, the gray scale value to be displayed is the gray scale value to be displayed after the current display gray scale value is displayed by the light emitting unit.
And 103, comparing the current display gray scale value with the gray scale value to be displayed, and determining a transitional display gray scale value according to the gray scale value to be displayed and the current display gray scale value when the absolute value of the difference value between the current display gray scale value and the gray scale value to be displayed is greater than a set threshold value.
Specifically, if the difference between the current display gray scale value and the gray scale value to be displayed is greater than the set threshold, when the light emitting unit switches from the current display gray scale value to the gray scale value to be displayed, due to the hysteresis effect of the driving transistor, a significant luminance deviation may exist in the initial switching time period, which affects the image display quality. Taking the example that the light emitting unit can display 256 gray levels, that is, the minimum display gray level value is 0 and the maximum display gray level value is 255 as an example, if the current display gray level value is 255 and the to-be-displayed gray level value is 48, a large luminance deviation may exist in the initial switching time period; at this time, a transitional display gray scale value can be determined according to the current display gray scale value and the gray scale value to be displayed. If the absolute value of the difference between the current display gray scale value and the gray scale value to be displayed is smaller than the set threshold, when the brightness deviation of the light-emitting unit is switched from the current display gray scale value to the gray scale value to be displayed, the brightness deviation is small or no brightness deviation exists, and at the moment, the transitional display gray scale value can not be obtained, so that the calculated amount is reduced, and the energy consumption is saved. The size of the set threshold may be determined according to the gray scale of the display panel and the display quality requirement of the display screen, for example, when the gray scale of the display panel is divided into 256 levels, the size of the set threshold may be set to be greater than or equal to 32, and may be set to be 50, 100, or 128 for example.
And step 104, when the display of the current display gray scale value is finished, driving the light-emitting unit to display the transitional display gray scale value within the preset time. The transitional display gray scale value is a display gray scale between the current display gray scale value and the gray scale value to be displayed.
Specifically, when the light-emitting unit is switched from a larger current display gray scale value to a smaller gray scale value to be displayed, the display brightness is slightly darker relative to the gray scale value to be displayed in an initial switching time period, and since the transitional display gray scale value is the display gray scale between the current display gray scale value and the gray scale value to be displayed, that is, the current display gray scale value is larger than the gray scale value to be displayed, the display brightness of the light-emitting unit can be improved by displaying the transitional display gray scale value first after the current display gray scale is displayed, so that the influence of the partial darkness on the display quality of the display brightness on the picture is avoided.
Correspondingly, when the light-emitting unit is switched from the smaller current display gray scale value to the larger gray scale value to be displayed, the display brightness is slightly brighter than the gray scale value to be displayed in the initial switching time period, and the transitional display gray scale value is the display gray scale between the current display gray scale value and the gray scale value to be displayed, namely the current display gray scale value is smaller than the gray scale value to be displayed.
For example, the current display gray scale value is 255, the to-be-displayed gray scale value is 48, and if the display gray scale of the light emitting unit is directly switched from the current display gray scale value 255 to the to-be-displayed gray scale value 48, the display brightness will be smaller than the target display brightness corresponding to the 48 gray scale; and the transitional display gray scale value can be determined to be 49 according to the current display gray scale value 255 and the to-be-displayed gray scale value 48, and then the light-emitting unit displays the transitional display gray scale value 49 firstly after displaying the current display gray scale value 255, so that the display brightness after switching can be improved, and the actual display brightness is close to or equal to the target display brightness corresponding to the 48 gray scales.
In addition, the possible duration of the brightness deviation when the current display gray scale value is directly switched to the gray scale value to be displayed can be determined according to the current display gray scale value and the gray scale value to be displayed, and the preset time can be determined according to the possible duration and the characteristics of the display panel driving transistor. For example, when the difference between the current display gray scale value and the gray scale value to be displayed is large, the duration of the brightness deviation is long, a large preset time may be set, and when the difference between the current display gray scale value and the gray scale value to be displayed is small, the duration of the brightness deviation is short, a small preset time may be set.
105, after the display of the transitional display gray scale value is finished, driving the light-emitting unit to display the gray scale value to be displayed;
the display driving method of the display panel of the embodiment includes the steps of firstly obtaining a current display gray scale value of a light emitting unit, obtaining a to-be-displayed gray scale value of the light emitting unit, determining a transition display gray scale value when an absolute value of a difference value between the current display gray scale value and the to-be-displayed gray scale value is larger than a set threshold value, displaying the transition display gray scale value within a preset time, and displaying the to-be-displayed gray scale value after the transition display gray scale value is displayed, so that the problem of brightness deviation generated when the to-be-displayed gray scale value is directly displayed is solved.
Optionally, fig. 2 is a flowchart of a display driving method of a display panel according to another embodiment of the present invention, and referring to fig. 2, the display driving method includes:
102, acquiring a gray scale value to be displayed of a light-emitting unit;
specifically, the corresponding relationship between the gray scale and the actual display brightness includes an actual display brightness change curve when the light-emitting unit is switched from the current display gray scale value to the to-be-displayed gray scale value. The actual display brightness change curve can be obtained by testing in the manufacturing process of the display panel, and the actual display brightness curve is stored in the display panel, when the actual display brightness curve is switched from the current display gray scale value to the gray scale value to be displayed, the actual display brightness and the time are respectively obtained after 1 second, 5 seconds, 10 seconds, 15 seconds and 20 seconds after the switching in the process of switching from the current display gray scale value to the gray scale value to be displayed, if the current display gray scale value is 255 and the gray scale value to be displayed is 48, so that the actual display brightness change curve is formed. The transitional display gray scale value is determined through the actual display brightness of the actual brightness change curve, so that the time display brightness corresponding to the transitional display gray scale value in the preset time is closer to the target display brightness corresponding to the gray scale value to be displayed, the brightness deviation can be better reduced or eliminated, and the picture display quality of the display panel is further improved.
Specifically, a change curve of actual luminance at the time of switching of a display gray scale value in which luminance deviation is relatively likely to occur may be stored in advance, and an actual luminance curve of other display gray scales may be calculated by a fitting algorithm, an interpolation algorithm, or the like.
And step 104, when the display of the current display gray scale value is finished, driving the light-emitting unit to display the transitional display gray scale value within the preset time.
Optionally, the difference between the actual display brightness corresponding to the transitional display gray scale value and the target display brightness corresponding to the gray scale value to be displayed is smaller than the set brightness threshold value within the preset time.
Specifically, the set brightness threshold may be determined according to the brightness difference distinguishable by the user and the display quality requirement of the display panel, and the transitional display gray scale value is set such that the difference between the actual display brightness corresponding to the transitional display gray scale value and the target brightness corresponding to the gray scale value to be displayed is smaller than the set brightness threshold, so that the selection range of the transitional display gray scale value is enlarged while the brightness deviation is improved, the operation difficulty is further reduced, and the load of the display panel is reduced.
Optionally, fig. 3 is a flowchart of a display driving method of a display panel according to another embodiment of the present invention, where the display driving method includes:
102, acquiring a gray scale value to be displayed of a light-emitting unit;
Specifically, N is an integer greater than or equal to 2, and the sum of N sub-periods is equal to the preset time. Because the actual display brightness is changed within the brightness deviation duration, namely the brightness deviation is changed, if only the same transitional display gray scale value is displayed within the preset time, the problem of excessive compensation of the brightness deviation can occur, the preset time is divided into N sub-time periods, and the middle display gray scale value can be determined according to the brightness deviation of each sub-time period, so that the brightness deviation can be more accurately compensated, and the image display quality of the display panel is further improved.
Illustratively, the current display gray scale value is 255, the to-be-displayed gray scale value is 48, and during the process of switching from the current display gray scale value to the to-be-displayed gray scale value, the first 30 seconds after the switching is a period in which there is a brightness deviation, the actual display brightness may gradually increase from small to large in the period, and the actual display brightness is equal to the target display brightness corresponding to the 48 gray scales after 30 seconds. By dividing 30 seconds into N sub-periods, the corresponding intermediate display gray scale can be determined according to the deviation value between the time display brightness of each sub-period when no compensation is performed and the target display brightness corresponding to the 48 gray scales.
In addition, the N sub-periods may not be equal, the time corresponding to the N sub-periods may be determined according to the actual display luminance curve, if the actual display luminance curve is non-linear, the sub-period may be set more at a place where the actual display luminance curve changes faster, and the sub-period may be set less at a place where the actual display luminance curve changes slower, so that the actual display effect of the light emitting unit may be more uniform.
Meanwhile, N middle display gray scale values corresponding to the N sub-time periods are sequentially reduced or increased, so that the middle display gray scale values of the light-emitting unit in the preset time are slowly changed to the gray scale values to be displayed.
Specifically, in a time period in which the luminance deviation exists, the absolute value of the luminance deviation gradually decreases, so that the N intermediate display gray-scale values may sequentially change according to the change rule of the luminance deviation. For example, when the luminance deviation is greater than zero, the intermediate display gray scale value is lower than the to-be-displayed gray scale value to reduce the luminance deviation of the partial luminance, and since the luminance deviation is gradually reduced, the intermediate display gray scale value may be sequentially increased until the luminance deviation is zero, and the intermediate display gray scale value is equal to the to-be-displayed gray scale value, so that the actual display luminance of the light emitting unit is substantially maintained within the preset time. Accordingly, when the luminance deviation is less than zero, the intermediate display gray-scale values may be sequentially reduced.
Illustratively, when the current display gray-scale value is 255 and the to-be-displayed gray-scale value is 48, during the process of switching from the current display gray-scale value to the to-be-displayed gray-scale value, a period of time with a brightness deviation exists in the first 30 seconds after the switching, and the actual display brightness gradually increases from small to large in the period of time, the intermediate display gray-scale values of the N sub-periods may be set to be sequentially decreased, so that the actual display brightness of the light-emitting unit is maintained basically unchanged and is consistent with the display brightness after the period of time with the brightness deviation ends.
Illustratively, when the current display gray scale value is 0 and the to-be-displayed gray scale value is 48, during the process of switching from the current display gray scale value to the to-be-displayed gray scale value, a period of time with a brightness deviation exists in the first 30 seconds after the switching, the actual display brightness gradually decreases within the period of time, and the intermediate display gray scale values of the N sub-periods may be set to sequentially increase, so that the actual display brightness of the light-emitting unit is maintained substantially unchanged and is consistent with the display brightness after the period of time with the brightness deviation ends.
and 105, after the display of the transitional display gray scale value is finished, driving the light-emitting unit to display the gray scale value to be displayed.
Optionally, the light emitting unit is a red light emitting unit, a green light emitting unit or a blue light emitting unit;
specifically, the display panel may include a plurality of light emitting units, and when the display panel includes a red light emitting unit, a green light emitting unit, or a blue light emitting unit, the luminance deviation of each light emitting unit may be compensated, so as to improve the luminance deviation problem during the display process of the display panel.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a display driving apparatus according to an embodiment of the present invention, the display driving apparatus includes:
a first obtaining unit 310, configured to obtain a current display gray scale value of the light emitting unit;
a second obtaining unit 320, configured to obtain a gray scale value to be displayed of the light emitting unit;
the processing unit 330 is configured to compare the current display gray scale value with the to-be-displayed gray scale value, and determine a transition display gray scale value according to the to-be-displayed gray scale value and the current display gray scale value when an absolute value of a difference between the current display gray scale value and the to-be-displayed gray scale value is greater than a set threshold;
the first display unit 340 is configured to drive the light emitting unit to display the transitional display gray scale value within a preset time when the display of the current display gray scale value is finished;
the second display unit 350 is configured to drive the light emitting unit to display the to-be-displayed gray scale value after the transitional display gray scale value is displayed; and the transitional display gray scale value is a display gray scale between the current display gray scale value and the gray scale value to be displayed.
The display driving apparatus provided in this embodiment and the display driving method of the display panel provided in any embodiment of the present invention belong to the same inventive concept, and have corresponding beneficial effects, and the technical details that are not similar to those of this embodiment will be described in detail in the display driving method of the display panel provided in any embodiment of the present invention.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a display device according to an embodiment of the present invention, and the display device 20 includes a display panel 19 and a display driving device according to any embodiment of the present invention;
illustratively, the display panel 19 is an organic light emitting diode display panel.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (8)
1. A display driving method of a display panel, the display panel including at least one light emitting unit, the method comprising:
acquiring a current display gray scale value of the light-emitting unit;
acquiring a gray scale value to be displayed of the light-emitting unit;
comparing the current display gray scale value with the to-be-displayed gray scale value, and determining a transition display gray scale value according to the to-be-displayed gray scale value and the current display gray scale value when the absolute value of the difference value between the current display gray scale value and the to-be-displayed gray scale value is greater than a set threshold value;
when the display of the current display gray scale value is finished, driving the light-emitting unit to display the transition display gray scale value within a preset time;
after the transitional display gray scale value is displayed, driving the light-emitting unit to display the gray scale value to be displayed; the transitional display gray scale value is a display gray scale between the current display gray scale value and the gray scale value to be displayed;
driving the light emitting unit to display the transitional display gray scale value within a preset time includes:
determining N sub-time periods and N middle display gray-scale values which are in one-to-one correspondence with the N sub-time periods;
driving the light emitting unit to sequentially display the N intermediate display gray scale values;
wherein, N is an integer greater than or equal to 2, and the sum of the N sub-time periods is equal to the preset time;
and sequentially reducing or increasing the N middle display gray-scale values corresponding to the N sub-time periods.
2. The driving method according to claim 1, wherein determining a transitional display gray scale value according to the to-be-displayed gray scale value and the current display gray scale value comprises:
determining the transitional display gray scale value according to the corresponding relation between the gray scale of the light-emitting unit and the actual display brightness;
the corresponding relation between the gray scale and the actual display brightness comprises an actual display brightness change curve when the current display gray scale value of the light-emitting unit is switched to the gray scale value to be displayed.
3. The driving method according to claim 2, characterized in that:
and in the preset time, the difference value between the actual display brightness corresponding to the transitional display gray scale value and the target display brightness corresponding to the gray scale value to be displayed is smaller than a set brightness threshold value.
4. The driving method according to claim 1, wherein N of the sub-periods are not equal.
5. The driving method according to claim 1, wherein the light emitting unit is a red light emitting unit, a green light emitting unit, or a blue light emitting unit.
6. A display driving apparatus, comprising: the first acquisition unit is used for acquiring the current display gray scale value of the light-emitting unit;
the second acquisition unit is used for acquiring the gray scale value to be displayed of the light-emitting unit;
the processing unit is used for comparing the current display gray scale value with the to-be-displayed gray scale value, and when the absolute value of the difference value between the current display gray scale value and the to-be-displayed gray scale value is larger than a set threshold, determining a transitional display gray scale value according to the to-be-displayed gray scale value and the current display gray scale value;
the first display unit is used for driving the light-emitting unit to display the transitional display gray scale value within preset time when the display of the current display gray scale value is finished;
the second display unit is used for driving the light-emitting unit to display the gray scale value to be displayed after the transitional display gray scale value is displayed; the transitional display gray scale value is a display gray scale between the current display gray scale value and the gray scale value to be displayed;
driving the light emitting unit to display the transitional display gray scale value within a preset time includes:
determining N sub-time periods and N middle display gray-scale values which are in one-to-one correspondence with the N sub-time periods;
driving the light emitting unit to sequentially display the N intermediate display gray scale values;
wherein, N is an integer greater than or equal to 2, and the sum of the N sub-time periods is equal to the preset time;
and sequentially reducing or increasing the N middle display gray-scale values corresponding to the N sub-time periods.
7. A display device comprising a display panel and the display driving device according to claim 6.
8. The display device according to claim 7, wherein the display panel is an Organic Light Emitting Diode (OLED) display panel.
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