CN109272931B - Display control method and device of display panel and display equipment - Google Patents
Display control method and device of display panel and display equipment Download PDFInfo
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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Abstract
The invention provides a display control method of a display panel, wherein the display panel comprises a plurality of pixels, and each display period of the display panel comprises the following steps: a driving stage of supplying a driving signal to each pixel and a blank stage of stopping supplying the driving signal, the display control method including: acquiring a mapping relation between a plurality of target refreshing frequencies and a plurality of frequency adjusting instructions; when the frequency adjusting instruction is received, detecting whether the current refreshing frequency of the display panel is equal to the target refreshing frequency corresponding to the frequency adjusting instruction, if not, keeping the duration of the current driving stage of the display panel unchanged, and adjusting the duration of the blank stage, so that the current refreshing frequency of the display panel is adjusted to be the target refreshing frequency corresponding to the frequency adjusting instruction. The invention also provides a display control device of the display panel and a display device. The invention is beneficial to improving user experience, and reduces the refreshing frequency in some interfaces which do not need to refresh pictures with high frequency, thereby reducing the power consumption.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display control method, a display control device and display equipment of a display panel.
Background
With the development of display technology, the display effect of display products is continuously improved, so that the application of the display products is more and more extensive.
In the prior art, the display panel usually updates the picture with a fixed refresh frequency, which results in some application occasions (for example, in game APP), failing to meet the requirements of users, and in other occasions, a large amount of power consumption is consumed.
Disclosure of Invention
The invention aims to solve at least one technical problem in the prior art, and provides a display control method, a display control device and display equipment of a display panel.
In order to achieve the above object, the present invention provides a display control method of a display panel including a plurality of pixels, each display period of the display panel including: a driving stage of supplying a driving signal to each pixel and a blank stage of stopping supplying the driving signal, the display control method comprising:
acquiring a mapping relation between a plurality of target refreshing frequencies and a plurality of frequency adjusting instructions;
when a frequency adjusting instruction is received, detecting whether the current refreshing frequency of the display panel is equal to the target refreshing frequency corresponding to the frequency adjusting instruction, if not, keeping the duration of the current driving stage of the display panel unchanged, and adjusting the duration of the blank stage, so that the current refreshing frequency of the display panel is adjusted to be the target refreshing frequency corresponding to the frequency adjusting instruction.
Optionally, the display panel includes a plurality of pixels, each of which has a light emitting unit disposed therein; the display control method further includes:
in the display period, a light emission control signal is supplied to the pixel, the light emission control signal including: a portion in an active level state and a portion in an inactive level state;
before and after the time length of the blank stage is adjusted, the ratio of the time length of the luminous control signal in the effective level state in the display period to the time length of the display period is kept unchanged.
Optionally, the light emission control signal is a periodic signal switched between the active state and the inactive state, and a difference between the durations of the blank phases before and after the adjustment is an integer multiple of the period of the light emission control signal.
Optionally, when a frequency adjustment instruction is received and the current refresh frequency is not equal to the target refresh frequency corresponding to the frequency adjustment instruction, the display control method further includes:
and determining the period of the light-emitting control signal according to the number of the periods of the light-emitting control signal in the current display period.
Accordingly, the present invention also provides a display control apparatus of a display panel, the display panel including a plurality of pixels, each display period of the display panel including: a driving stage and a blank stage; the display control apparatus includes: the driving module is used for writing a data signal into each pixel in a display driving stage of a display period; and stopping writing the data signal in a blank stage of the display period; the display control apparatus further includes:
the mapping acquisition module is used for acquiring the mapping relation between a plurality of target refreshing frequencies and a plurality of frequency adjusting instructions;
and the control module is used for detecting whether the current refreshing frequency of the display panel is equal to the target refreshing frequency corresponding to the frequency adjusting instruction or not when the frequency adjusting instruction is received, if not, keeping the duration of the current driving stage of the display panel unchanged, and adjusting the duration of the blank stage so as to adjust the current refreshing frequency of the display panel to be the target refreshing frequency corresponding to the frequency adjusting instruction.
Optionally, a light emitting unit is disposed in each pixel, and the driving module is further configured to provide a light emitting control signal to the pixel in the display period, where the light emitting control signal includes: a portion in an active level state and a portion in an inactive level state;
before and after the time length of the blank stage is adjusted, the ratio of the time length of the luminous control signal in the effective level state in the display period to the time length of the display period is kept unchanged.
Optionally, the light emission control signal is a periodic signal switched between the active state and the inactive state, and a difference between the durations of the blank periods before and after the adjustment is an integer multiple of the period of the light emission control signal.
Optionally, the display control apparatus further includes: and the calculating module is used for determining the period of the light-emitting control signal according to the period number of the light-emitting control signal in each display period.
Correspondingly, the invention also provides display equipment which comprises a display panel, wherein the display panel comprises a plurality of pixels, and the display device also comprises the display control device of the display panel.
Optionally, the display panel further includes a plurality of gate lines and a plurality of data lines, and the gate lines and the data lines are arranged in a crossing manner; each pixel corresponds to one grid line and one data line; the grid line and the data line are both connected with the driving module; the pixel is provided with a light-emitting unit and a pixel circuit, and the pixel circuit comprises a driving transistor, a writing transistor, a light-emitting control transistor and a capacitor; wherein the content of the first and second substances,
the grid electrode of the writing transistor is connected with the corresponding grid line, the first pole of the writing transistor is connected with the corresponding data line, and the second pole of the writing transistor is connected with the grid electrode of the driving transistor;
the first pole of the driving transistor is connected with a power supply end, the second pole of the driving transistor is connected with the first pole of the light-emitting control transistor, and the grid of the light-emitting control transistor is connected with the driving module;
two ends of the capacitor are respectively connected with the grid electrode and the first electrode of the driving transistor;
and the first pole of the light-emitting unit is connected with the second pole of the light-emitting control transistor, and the second pole of the light-emitting unit is connected with the low-level signal end.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram illustrating the operation of each row of pixels in a display period;
fig. 2 is a flowchart of a display control method according to an embodiment of the present invention;
fig. 3 is a schematic view of a structure of a light emitting unit and a pixel circuit provided in a pixel;
FIG. 4a and FIG. 4b are timing diagrams of signals before and after adjusting the refresh rate, respectively, in an embodiment;
FIG. 5 is a GAMMA2.2 graph before and after the refresh frequency is switched from 90Hz to 60 Hz;
fig. 6 is a schematic structural diagram of a display control apparatus of a display panel according to a second embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
It should be understood at first that the time (i.e., the display period Frame) when the display panel displays any one Frame of picture includes a driving phase and a blank phase. In the driving stage, the driving module supplies a driving signal to each pixel, and in the blank stage, the driving module stops supplying the driving signal to the pixel. Fig. 1 is a schematic diagram of an operation process of each row of pixels in a display period, and as shown in fig. 1, in each display period Frame, the driving module provides driving signals for the pixels row by row, and the pixels are in a driving sub-phase Tr. The duration of the driving sub-phase Tr is (1/f-VBP-VFP-VSW)/NL, wherein VBP is the back shoulder of the frame synchronization signal Vsync, VFP is the front shoulder of the frame synchronization signal Vsync, VSW is the pulse width of the frame synchronization signal Vsync, and NL is the number of rows of pixels; the sum of VBP, VFP and VSW is the duration of the blank phase. The pixel starts emitting light after receiving the driving signal, and enters a light-emitting sub-phase EL. More specifically, the driving module providing the driving signal to each pixel includes: the pixel is reset and then a data signal is written to the pixel, so that the light emission luminance of the pixel corresponds to the data signal written to the pixel. Namely, the driving phase is: a phase from a start time of supplying the driving signal to the first row of pixels to an end time of supplying the driving signal to the last row of pixels; the blank stage is: a stage from an end time of supplying the driving signal to the last row of pixels to a start time of supplying the driving signal to the first row of pixels in a next frame. In addition, in each display period Frame, the light emitting control signal may be provided to the pixel, so that the pixel operation process may include a plurality of spaced light emitting sub-periods EL.
It can be understood that, when the display period Frame of the display panel is longer, the refresh frequency of the picture is smaller; the shorter the display period Frame of the display panel is, the greater the refresh frequency of the picture is. In the current display products, the refreshing frequency of the picture is fixed, but the demands of users are different for different display interfaces, for example, in a mobile phone or a computer, the users often have extremely high requirements for game interfaces, and in order to achieve a vivid and drag-free display effect, the refreshing frequency needs to be higher; for other interfaces (e.g., music playing interface), the user's requirement for the interface is not high, and at this time, too high refresh frequency will waste more energy consumption.
In order to meet different requirements of a user on a display interface, an embodiment of the present invention provides a display control method for a display panel. The display panel includes a plurality of pixels, and each display period of the display panel includes: a driving stage for supplying a driving signal to each pixel and a blank stage for stopping supplying the driving signal. The detailed explanation of the driving phase and the blank phase is mentioned above and will not be described herein. Fig. 2 is a flowchart of a display control method according to an embodiment of the present invention, and as shown in fig. 2, the display control method of the display panel includes:
and S1, acquiring the mapping relation between the target refresh frequencies and the frequency adjusting commands.
Wherein, the mapping relation can be preset and stored. In some embodiments, the frequency adjustment instruction may be generated by operation of a user. For example, a user may enter different types of interfaces while generating different frequency adjustment instructions; specifically, a music playing interface and a document interface are first-type display interfaces; the game interface and the video interface are second-type display interfaces; when a user enters a first type of interface, the processing module generates a first frequency adjusting instruction, and at this time, the corresponding target refresh frequency may be a first refresh frequency, such as 60 Hz; when the user enters the second type of interface, the processing module generates a second frequency adjustment instruction, and the corresponding target refresh frequency is a second refresh frequency, such as 90 Hz. In another embodiment, the frequency adjustment instruction may be generated by the processing module through detection and calculation; specifically, when the processing module detects that the number of the same pictures in the pictures displayed in each unit time in the current display process reaches a certain threshold, the change of the current image is small, the refresh frequency can be reduced, and at the moment, a first frequency adjusting instruction is generated; otherwise, a second frequency adjustment command is generated.
Of course, the number of frequency adjustment commands is not limited to the two types described above, and may be plural.
S2, when receiving the frequency adjusting instruction, detecting whether the current refresh frequency of the display panel is equal to the target refresh frequency corresponding to the frequency adjusting instruction; if not, go to step S21; if so, the process proceeds to step S22.
S21, keeping the duration of the current driving phase of the display panel unchanged, and adjusting the duration of the blank phase to adjust the current refresh frequency of the display panel to the target refresh frequency corresponding to the frequency adjustment instruction.
It can be understood that, when the target refresh frequency is greater than the current refresh frequency, the duration of the current driving phase is kept unchanged, and the duration of the blank phase is reduced, so that the duration of the display period is reduced, and the current refresh frequency is increased to the target refresh frequency; when the target refresh frequency is less than the current refresh frequency, the duration of the current driving phase is kept unchanged, and the duration of the blank phase is increased, so that the duration of the display phase is increased, and the current refresh frequency is reduced to the target refresh frequency.
And S22, keeping the current refresh frequency. That is, the duration of the current driving phase and the duration of the blank phase are both kept constant.
In the display control method provided by the embodiment, the display panel does not refresh at a fixed frequency, but can be according to different instructions, so that the high-quality requirements of users on certain pictures are met, and the user experience is improved; and in some interfaces which do not need high-frequency refreshing pictures, the refreshing frequency is reduced, so that the power consumption is reduced.
The display control method is particularly suitable for controlling the display of an organic electroluminescence (OLED) display panel. The display panel further comprises a plurality of grid lines and a plurality of data lines, wherein the grid lines and the data lines are arranged in a crossed mode to define a plurality of pixels. Each pixel corresponds to one gate line and one data line. The pixel is provided with a light emitting unit and a pixel circuit. The display control method further includes: in the display period, a light emission control signal is supplied to the pixel, the light emission control signal including: a portion in an active level state and a portion in an inactive level state.
Fig. 3 is a schematic structural view of a light emitting unit and a pixel circuit provided in a pixel, and as shown in fig. 3, the pixel circuit includes a driving transistor T2, a writing transistor T1, a light emission controlling transistor T3, and a capacitor C. The GATE of the write transistor T1 is connected to the corresponding GATE line GATE, the first pole of the write transistor T1 is connected to the corresponding DATA line DATA, and the second pole of the write transistor T1 is connected to the GATE of the driving transistor T2. A first electrode of the driving transistor T2 is connected to a power source terminal VDD, a second electrode of the driving transistor T2 is connected to a first electrode of the light emission controlling transistor T3, and a gate electrode of the light emission controlling transistor T3 is connected to the light emission controlling terminal EM. The two terminals of the capacitor C are respectively connected to the gate and the first pole of the driving transistor T2. The first pole of the light emitting cell 10 is connected to the second pole of the light emission controlling transistor T3, and the second pole of the light emitting cell 10 is connected to the low level signal terminal VSS.
The emission control terminal EM is used to supply an emission control signal to the gate of the emission control transistor T3. The light-emission control signal being in the "active level state" means that the light-emission control signal controls a level state corresponding to the light-emission control transistor T3 being turned on; the light emission control signal in the "inactive level state" means a level state corresponding to when the light emission control signal controls the light emission control transistor T3 to be turned off. When the light emission controlling transistor T3 is a P-type transistor, the active level state is a low level state; the invalid level state is a high level state; when the light emission controlling transistor T3 is an N-type transistor, the active level state is a high level state, and the inactive level state is a low level state. In the present invention, each transistor is described as an example of a P-type transistor.
In the driving phase of each display period, the driving module provides scanning signals to the pixels row by row, and when the gate of the writing transistor T1 in the pixel circuit receives the scanning signals, the writing transistor T1 is turned on, so that the data signals on the data lines are written into the gate of the driving transistor T2 and stored in the capacitor C, so that the driving transistor T2 is turned on to provide driving current to the light emitting unit 10; and the driving transistor T2 is kept turned on by the storage function of the capacitor C. When the light emission control signal of the light emission control terminal EM is a low level signal, the light emission control transistor T3 is turned on; when the light emission control signal is a high level signal, the light emission control transistor T3 is turned off; therefore, the duration in which the light emission control signal is in the active level state in the display period determines the light emission duration of the light emitting unit. In the process of displaying one frame of picture, for human eyes, the proportion of the light-emitting time of the light-emitting unit 10 in the display period is different, and then the human eyes feel different brightness.
In order to ensure that the brightness of the picture does not differ before and after the refresh frequency of the display panel is adjusted, preferably, before and after the duration adjustment of the blank period, the ratio of the duration of the light-emitting control signal in the active level state in the display period to the duration of the display period is kept unchanged, so that before and after the refresh frequency of the display panel is adjusted, the ratio of the light-emitting duration of the light-emitting unit in the display period to the duration of the display period is kept unchanged, and further the brightness of the picture is kept unchanged.
Specifically, the light emission control signal is a periodic signal that switches between an active state and an inactive state. At this time, when the frequency adjustment command is received and the current refresh frequency is not equal to the target refresh frequency corresponding to the frequency adjustment command, the display control method further includes: the period of the light emission control signal is determined according to the number of periods of the light emission control signal in the current display period. Thus, in step S21, the blank period is adjusted according to the period of the emission control signal and the target refresh frequency, so that the difference between the blank period before and after the adjustment is an integral multiple of the period of the emission control signal.
Specifically, assuming that the light emission control signal includes n1 periods in the current display period, the current refresh frequency is F1, and the target refresh frequency is F2, after the duration adjustment of the blank period, the number of periods n2 ═ n1 × F1/F2 in each display period is determined by the light emission control signal. FIG. 4a and FIG. 4b are timing diagrams of signals before and after adjusting the refresh rate, respectively, in an embodiment. In each display period, the control module generates the driving control signal TE, as shown in fig. 4a and 4b, the driving control signal TE is in an active level state in the driving stage and in an inactive level state in the blank stage. The driving module provides driving signals for the pixels in a driving stage according to the driving control signals, and stops providing the driving signals in a blank stage. The refresh frequency of the display panel corresponding to fig. 4a is 90Hz, and at this time, as shown in fig. 4a, the light emission control signal escv includes 4 periods in each display period, so that the duration of each period of the light emission control signal escv is 1/4 times the duration of the display period. The refresh frequency of the display panel corresponding to fig. 4b is 60Hz, and in order to adjust the refresh frequency from 90Hz to 60Hz, the duration of the blank period is increased, so that the light emission control signal ESTV has 4 × 90/60-6 periods in each display period.
Fig. 5 shows the GAMMA2.2 curve before and after the refresh frequency is switched from 90Hz to 60Hz, and in fig. 5, the GAMMA2.2 curve at the refresh frequency of 90Hz and the GAMMA2.2 curve at the refresh frequency of 60Hz are completely overlapped, that is, the brightness of the display panel is not changed before and after the refresh frequency is switched between 90Hz and 60 Hz.
In the display control method provided in the first embodiment of the present invention, the display panel does not perform the refresh frequency at a fixed frequency, but may perform the refresh frequency according to different commands, so as to meet the high quality requirement of some pictures for a user, and reduce the refresh frequency in some interfaces that do not need to refresh pictures at a high frequency, thereby reducing power consumption. In addition, the brightness of the display screen is not changed before and after the refresh frequency adjustment. Moreover, the display control method is convenient to realize, and the production line time can be saved.
Based on the same inventive concept, a second embodiment of the present invention provides a display control apparatus for a display panel, where the display panel includes a plurality of pixels, and each pixel has a light emitting unit disposed therein. Each display period of the display panel includes: a drive phase and a blank phase. Fig. 6 is a schematic structural diagram of a display control device of a display panel according to a second embodiment of the present invention, and as shown in fig. 6, the display control device includes a driving module 20, a mapping obtaining module 30, and a control module 40.
The driving module 20 is configured to write a data signal into each pixel in a display driving phase of a display period; and stops writing the data signal in the blank period of the display period. The driving module 20 provides scanning signals to the gate lines line by line and provides data signals to the pixels through the data lines; the driving circuit 20 is further configured to provide a light-emitting control signal to the pixel through the light-emitting control terminal in the display period, the light-emitting control signal including: a portion in an active level state and a portion in an inactive level state. Also, the light emission control signal is a periodic signal that switches between an active state and an inactive state.
The mapping obtaining module 30 is configured to obtain mapping relationships between a plurality of target refresh frequencies and a plurality of frequency adjustment commands.
The control module 40 is configured to detect whether a current refresh frequency of the display panel is equal to a target refresh frequency corresponding to the frequency adjustment command when the frequency adjustment command is received, and if not, keep a duration of a current driving stage of the display panel unchanged and adjust a duration of a blank stage, so as to adjust the current refresh frequency of the display panel to the target refresh frequency corresponding to the frequency adjustment command.
The display control apparatus further includes a calculation module 50, and the calculation module 50 is configured to determine a period of the light emission control signal according to the number of periods of the light emission control signal in each display period. Before and after the time length adjustment of the blank stage, the ratio of the time length of the luminous control signal in the effective level state in the display period to the time length of the display period is kept unchanged. When the light-emitting control signal is a periodic signal, the difference value of the blank period before and after adjustment is integral multiple of the period of the light-emitting control signal. Wherein, the adjustment of the time length of the blank stage is as follows: after the driving module 20 finishes supplying the driving signal to the last row of pixels, the waiting time of the driving module 20 is adjusted. The specific adjustment principle has been described above and will not be described in detail here.
Based on the same inventive concept, a third embodiment of the present invention provides a display device, which includes a display panel and the display control apparatus provided in the second embodiment, wherein the display panel includes a plurality of pixels. The display panel includes a plurality of gate lines and a plurality of data lines, a light emitting unit and a pixel circuit are disposed in the pixel, and the specific structure of the pixel circuit is described above and is not described herein again.
The display device can be a product or a device with a display function, such as a mobile phone, a display, a tablet computer, a navigator and the like.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (8)
1. A display control method of a display panel including a plurality of pixels, each display period of the display panel comprising: a driving stage of supplying a driving signal to each pixel and a blank stage of stopping supplying the driving signal, wherein the display control method comprises:
acquiring a mapping relation between a plurality of target refreshing frequencies and a plurality of frequency adjusting instructions;
when a frequency adjusting instruction is received, detecting whether the current refreshing frequency of the display panel is equal to the target refreshing frequency corresponding to the frequency adjusting instruction, if not, keeping the duration of the current driving stage of the display panel unchanged, and adjusting the duration of the blank stage so as to adjust the current refreshing frequency of the display panel to be the target refreshing frequency corresponding to the frequency adjusting instruction;
the display panel includes a plurality of pixels, each of which has a light emitting unit disposed therein; the display control method further includes:
in the display period, a light emission control signal is supplied to the pixel, the light emission control signal including: a portion in an active level state and a portion in an inactive level state;
before and after the time length of the blank stage is adjusted, the ratio of the time length of the luminous control signal in the effective level state in the display period to the time length of the display period is kept unchanged.
2. The display control method according to claim 1, wherein the light emission control signal is a periodic signal that switches between the active level state and the inactive level state, and a difference between the durations of the blanking periods before and after the adjustment is an integral multiple of the period of the light emission control signal.
3. The display control method according to claim 2, wherein when a frequency adjustment command is received and a current refresh frequency is not equal to a target refresh frequency corresponding to the frequency adjustment command, the display control method further comprises:
and determining the period of the light-emitting control signal according to the number of the periods of the light-emitting control signal in the current display period.
4. A display control apparatus of a display panel including a plurality of pixels, each display period of the display panel comprising: a driving stage and a blank stage; the display control apparatus includes: the driving module is used for writing a data signal into each pixel in a display driving stage of a display period; and stopping writing the data signal in a blank stage of the display period; characterized in that, the display control device further comprises:
the mapping acquisition module is used for acquiring the mapping relation between a plurality of target refreshing frequencies and a plurality of frequency adjusting instructions;
the control module is used for detecting whether the current refreshing frequency of the display panel is equal to the target refreshing frequency corresponding to the frequency adjusting instruction or not when the frequency adjusting instruction is received, if not, keeping the duration of the current driving stage of the display panel unchanged, and adjusting the duration of the blank stage so as to adjust the current refreshing frequency of the display panel to be the target refreshing frequency corresponding to the frequency adjusting instruction;
each pixel is provided with a light-emitting unit, the driving module is further configured to provide a light-emitting control signal to the pixel in the display period, where the light-emitting control signal includes: a portion in an active level state and a portion in an inactive level state;
before and after the time length of the blank stage is adjusted, the ratio of the time length of the luminous control signal in the effective level state in the display period to the time length of the display period is kept unchanged.
5. The display control apparatus according to claim 4, wherein the light emission control signal is a periodic signal that switches between the active level state and the inactive level state, and a difference between the durations of the blanking periods before and after the adjustment is an integral multiple of the period of the light emission control signal.
6. The display control apparatus according to claim 4, characterized in that the display control apparatus further comprises: and the calculating module is used for determining the period of the light-emitting control signal according to the period number of the light-emitting control signal in each display period.
7. A display device comprising a display panel comprising a plurality of pixels, characterized in that the display device further comprises display control means of the display panel of any one of claims 4 to 6.
8. The display device according to claim 7, wherein the display panel further comprises a plurality of gate lines and a plurality of data lines, the gate lines and the data lines being arranged to cross; each pixel corresponds to one grid line and one data line; the grid line and the data line are both connected with the driving module; the pixel is provided with a light-emitting unit and a pixel circuit, and the pixel circuit comprises a driving transistor, a writing transistor, a light-emitting control transistor and a capacitor; wherein the content of the first and second substances,
the grid electrode of the writing transistor is connected with the corresponding grid line, the first pole of the writing transistor is connected with the corresponding data line, and the second pole of the writing transistor is connected with the grid electrode of the driving transistor;
the first pole of the driving transistor is connected with a power supply end, the second pole of the driving transistor is connected with the first pole of the light-emitting control transistor, and the grid of the light-emitting control transistor is connected with the driving module;
two ends of the capacitor are respectively connected with the grid electrode and the first electrode of the driving transistor;
and the first pole of the light-emitting unit is connected with the second pole of the light-emitting control transistor, and the second pole of the light-emitting unit is connected with the low-level signal end.
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| CN110675824B (en) * | 2019-10-09 | 2021-08-27 | 京东方科技集团股份有限公司 | Signal output circuit, driving IC, display device and driving method thereof |
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