CN114446212B - Display device and self-refreshing method thereof - Google Patents
Display device and self-refreshing method thereof Download PDFInfo
- Publication number
- CN114446212B CN114446212B CN202011194289.7A CN202011194289A CN114446212B CN 114446212 B CN114446212 B CN 114446212B CN 202011194289 A CN202011194289 A CN 202011194289A CN 114446212 B CN114446212 B CN 114446212B
- Authority
- CN
- China
- Prior art keywords
- display
- sub
- self
- picture signal
- pixels
- 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.)
- Active
Links
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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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)
Abstract
The invention provides a display device and a self-refreshing method thereof, relates to the technical field of circuits, and can greatly reduce power consumption and improve product quality. The self-refresh method comprises the following steps: acquiring a first picture signal and a prompt signal; determining whether to adopt a self-refresh mode according to the prompt signal; if yes, converting the first picture signal into a second picture signal; determining a driving unit needing to adopt self-refresh according to the second picture signal; acquiring and storing display data of at least a first row of sub-pixels of a display sub-region corresponding to a self-refreshing driving unit; stopping acquiring display data of the remaining row of sub-pixels of the display subarea corresponding to the driving unit adopting self-refresh; the saved display data of at least the first row of sub-pixels is provided to the remaining row of sub-pixels of the display sub-region corresponding to the driving unit employing self-refresh. The invention is suitable for self-refreshing the display device.
Description
Technical Field
The present invention relates to the field of circuit technologies, and in particular, to a display device and a self-refresh method thereof.
Background
Display devices are now widely used in various industries. Users have increasingly high demands for low power consumption of display devices, particularly mobile devices such as notebooks. The existing low power consumption schemes cannot meet the higher pursuit of the market.
Disclosure of Invention
The embodiment of the invention provides a display device and a self-refreshing method thereof, and the display device adopting the self-refreshing method can greatly reduce power consumption and improve product quality.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical scheme:
in one aspect, a self-refresh method is provided and applied to a display device, the display device comprises a driving circuit and a display panel, the display panel comprises a display area, the display area comprises a plurality of connected display subareas, and each display subarea comprises a plurality of sub-pixels arranged in an array; the driving circuit comprises a plurality of driving units, and the driving units correspond to the display subareas;
the self-refresh method comprises the following steps:
acquiring a first picture signal and a prompt signal;
determining whether to adopt a self-refresh mode according to the prompt signal;
if yes, converting the first picture signal into a second picture signal, wherein a blanking area of the second picture signal comprises a self-refresh command, an effective area of the second picture signal comprises display data of the sub-pixels of a plurality of display subareas, and the display data of all rows of the sub-pixels included in each column in at least one display subarea is the same;
determining the driving unit needing to adopt self-refresh according to the second picture signal; acquiring and storing display data of at least a first row of the sub-pixels of the display subarea corresponding to the driving unit adopting self-refreshing;
stopping acquiring display data of the sub-pixels of the remaining rows of the display sub-region corresponding to the driving unit adopting self-refresh;
and providing the saved display data of at least the first row of the sub-pixels for the remaining rows of the sub-pixels of the display subarea corresponding to the driving unit adopting self-refresh.
Optionally, the acquiring and storing the display data of the sub-pixels of the at least first row corresponding to the display sub-region by the driving unit using self-refresh includes:
acquiring and storing display data of the sub-pixels of the first row corresponding to the display sub-region by adopting the self-refreshing driving unit;
said providing stored display data of at least a first row of said sub-pixels to remaining rows of said sub-pixels of said display sub-region corresponding to said driving unit employing self-refresh comprises:
and providing the saved display data of the first row of the sub-pixels for the remaining row of the display sub-region corresponding to the driving unit adopting self-refresh.
Optionally, after the converting the first picture signal into the second picture signal and before the determining the driving unit that needs to employ self-refresh according to the second picture signal, the self-refresh method further includes:
and acquiring the second picture signal.
Optionally, the acquiring the second picture signal includes:
and acquiring the second picture signal by adopting a point-to-point protocol.
Optionally, before the acquiring the first picture signal and the prompt signal, the self-refresh method further includes:
and generating the first picture signal and the prompt signal.
Optionally, after the acquiring the first picture signal and the prompt signal, the self-refresh method further includes:
judging whether the first picture signal is the same as the first picture signal of the previous frame;
if yes, stopping acquiring the first picture signal of the next frame.
In another aspect, a display device employing the self-refresh method described above is provided, the display device including a driving circuit and a display panel;
the display panel comprises a display area, wherein the display area comprises a plurality of connected display subareas, and each display subarea comprises a plurality of sub-pixels which are arranged in an array;
the driving circuit comprises a time sequence control unit and a plurality of driving units, and the driving units correspond to the display subareas; the driving unit is electrically connected with the display panel and the time sequence control unit respectively.
Optionally, the timing control unit includes a timing controller, and the driving unit includes a driving chip.
Optionally, the timing control unit is configured to:
acquiring a first picture signal and a prompt signal;
determining whether to adopt a self-refresh mode according to the prompt signal;
if yes, converting the first picture signal into a second picture signal, wherein a blanking area of the second picture signal comprises a self-refresh command, an effective area of the second picture signal comprises display data of the sub-pixels of a plurality of display sub-areas, and display data of all rows of the sub-pixels included in each column of at least one display sub-area are the same.
Optionally, a plurality of the driving units are configured to:
determining the driving unit needing to adopt self-refresh according to the second picture signal;
acquiring and storing display data of at least a first row of the sub-pixels of the display subarea corresponding to the driving unit adopting self-refreshing;
stopping acquiring display data of the sub-pixels of the remaining rows of the display sub-region corresponding to the driving unit adopting self-refresh;
and providing the saved display data of at least the first row of the sub-pixels for the remaining rows of the sub-pixels of the display subarea corresponding to the driving unit adopting self-refresh.
Optionally, the display device further comprises a front-end device;
the front-end device is electrically connected to the timing control unit and configured to: a first picture signal and a cue signal are generated.
The embodiment of the invention provides a display device, a self-refreshing method and a display system thereof, wherein the self-refreshing method is applied to the display device, the display device comprises a driving circuit and a display panel, the display panel comprises a display area, the display area comprises a plurality of connected display subareas, and each display subarea comprises a plurality of sub-pixels arranged in an array; the driving circuit comprises a plurality of driving units, and the driving units correspond to the display subareas; the self-refresh method comprises the following steps: acquiring a first picture signal and a prompt signal; determining whether to adopt a self-refresh mode according to the prompt signal; if yes, converting the first picture signal into a second picture signal, wherein a blanking area of the second picture signal comprises a self-refresh command, an effective area of the second picture signal comprises display data of the sub-pixels of a plurality of display subareas, and the display data of all rows of the sub-pixels included in each column in at least one display subarea is the same; determining the driving unit needing to adopt self-refresh according to the second picture signal; acquiring and storing display data of at least a first row of the sub-pixels of the display subarea corresponding to the driving unit adopting self-refreshing; stopping acquiring display data of the sub-pixels of the remaining rows of the display sub-region corresponding to the driving unit adopting self-refresh; and providing the saved display data of at least the first row of the sub-pixels for the remaining rows of the sub-pixels of the display subarea corresponding to the driving unit adopting self-refresh.
Therefore, only the display data of at least the first row of sub-pixels of the display sub-region corresponding to the self-refreshing driving unit is required to be acquired and stored, the display data of the remaining rows of sub-pixels are required to be acquired without additional acquisition, so that the transmission of the display data is reduced, the power consumption is greatly reduced, and the product quality is improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention;
fig. 2 is a block diagram of a display device according to an embodiment of the present invention;
FIG. 3 is a voltage waveform diagram of a column output by a driving unit according to an embodiment of the present invention;
fig. 4 is a schematic diagram of signal transmission of a timing controller and a driving chip using a P2P protocol according to an embodiment of the present invention;
fig. 5 is a schematic flow chart of a self-refresh method of a display device according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a driving chip and a display panel according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In embodiments of the invention, the meaning of "a plurality of" means two or more, and the meaning of "at least one" means one or more, unless specifically defined otherwise.
The embodiment of the invention provides a self-refreshing method, which is applied to a display device, wherein the display device comprises a driving circuit and a display panel, and referring to FIG. 1, the display panel 10 comprises a display area 16, the display area comprises a plurality of connected display subareas, and each display subarea comprises a plurality of sub-pixels 15 which are arranged in an array; the driving circuit comprises a plurality of driving units 21 corresponding to a plurality of display sub-areas.
In fig. 1, the display area 16 comprises 4 connected display sub-areas, denoted 11-14, respectively, and the driving circuit comprises 4 driving units 21, denoted IC1, IC2, IC3 and IC4, respectively, wherein IC1 corresponds to the display sub-area 11, IC2 corresponds to the display sub-area 12, IC3 corresponds to the display sub-area 13 and IC4 corresponds to the display sub-area 14. Fig. 1 only schematically shows the structure of the sub-pixels 15 comprised in the display sub-area 11, and the structure of the sub-pixels comprised in other display sub-areas is not shown, and reference is made to the display sub-area 11. It should be noted that the display panel may further include a non-display area, and a part of the circuits in the driving circuit may be disposed in the non-display area, or the driving circuit may be separately disposed on a circuit board, which is not limited herein.
Referring to fig. 5, the self-refresh method includes:
s01, acquiring a first picture signal and a prompt signal.
The first picture signal and the prompt signal may be generated by a front-end device of the display device, and the type of the first picture signal may be LVDS (Low-Voltage Differential Signaling, low voltage differential signaling) signals.
S02, determining whether to adopt a self-refresh mode according to the prompt signal.
The specific determination method is not limited here. For example, the hint signal may indicate that the self-refresh mode is used and the low level indicates that the self-refresh mode is not used, so that whether the self-refresh mode is used or not may be determined according to the level of the hint signal.
S03, if yes, converting the first picture signal into a second picture signal, wherein a blanking area of the second picture signal comprises a self-refresh command, an effective area of the second picture signal comprises display data of sub-pixels of a plurality of display sub-areas, and display data of all rows of sub-pixels included in each column in at least one display sub-area are the same.
It should be noted that, taking the frame rate as a time point, referring to fig. 4, taking the second picture signal including the P2P signal as an example, one frame of the P2P signal may include an active area and a blanking area; the Active area is also called Active area, and corresponds to the effective period of the driving voltage signal; the blanking region is also called a Vblanking region, and corresponds to a preparation period of the driving voltage signal. If the driving voltage signal is used for driving the sub-pixels of the display panel, the effective period of the driving voltage signal corresponds to the sub-pixel display stage; the preparation period of the driving voltage signal corresponds to a very short time, and is hardly felt by human eyes.
In addition, referring to fig. 4, other control commands may be set in the active area of the second picture signal, for example: signal training, output mode setting, pgamma (gamma voltage), etc., for determining the output characteristics of the driving unit.
The blanking region of the second picture signal includes a self-refresh command, wherein the self-refresh command is capable of determining which specific driving unit needs to be in the self-refresh mode. The specific setting manner of the self-refresh command is not limited herein, and the corresponding setting needs to be determined according to the data transmission protocol.
The effective area of the second picture signal includes display data of sub-pixels of a plurality of display sub-areas, and display data of all rows of sub-pixels included in each column of at least one display sub-area is the same, which indicates that at least one display sub-area in the display panel will display a solid-color picture.
Of course, if it is determined that the self-refresh mode is not required after S02, the subsequent steps are performed in accordance with the normal operation mode in the related art.
S04, determining a driving unit needing to adopt self-refresh according to the second picture signal.
Specifically, the driving unit that needs to employ self-refresh may be determined according to the self-refresh command of the second picture signal. And the other driving units without self-refresh are used for carrying out the subsequent steps according to the normal working mode in the related technology.
S05, acquiring and storing display data of at least a first row of sub-pixels of a display sub-region corresponding to the self-refreshing driving unit.
After S05, the acquired display data of at least the first row of sub-pixels may be provided to the driving unit, and then transmitted to the sub-pixels corresponding to the display sub-regions in the display panel, so as to implement display.
S06, stopping obtaining the display data of the remaining row of sub-pixels of the display subarea corresponding to the driving unit adopting self-refresh.
S07, providing the saved display data of at least the first row of sub-pixels for the remaining row of sub-pixels of the display sub-region corresponding to the driving unit adopting self-refresh.
The principle of the self-refresh method described above to reduce power consumption is described below. The sub-pixels of the display panel are driven in column inversion. The column inversion driving method means: if the first column of sub-pixels adopts positive voltage driving, the second column of sub-pixels adopts negative voltage driving, and the subsequent columns of sub-pixels are analogized in sequence, namely, the adjacent two columns of sub-pixels are respectively driven by positive voltage and read voltage. If a solid-color picture is displayed, the driving voltage values of the sub-pixels located in different rows are the same in each column of sub-pixels. Fig. 3 is a waveform diagram of a column of voltages output by the driving unit under a solid-color screen. Referring to fig. 3, the driving voltage is maintained constant and always maintained at a voltage level during a display period of a frame of solid-color picture.
And the driving voltage of each row of sub-pixels provided by the driving unit is obtained through the time sequence control unit, so that the driving unit only needs to acquire and store the display data of at least the first row of sub-pixels from the time sequence control unit under the pure color picture or part of the pure color picture, and the display data of the remaining rows of sub-pixels can adopt the stored display data of at least the first row of sub-pixels. That is, the number of display data transfer between the driving unit and the timing control unit is greatly reduced, thereby reducing power consumption.
The self-refreshing method is suitable for displaying pure-color pictures or partially displaying scenes of the pure-color pictures; the display data of at least the first row of sub-pixels of the display sub-region corresponding to the self-refreshing driving unit is only required to be acquired and stored, the display data of the remaining rows of sub-pixels are only required to be acquired by the stored display data of at least the first row of sub-pixels, and additional acquisition is not required, so that the transmission of the display data is reduced, the power consumption is greatly reduced, and the product quality is improved.
Optionally, in order to reduce power consumption to the greatest extent, S05, acquiring and storing display data of at least a first row of sub-pixels of a display sub-region corresponding to a driving unit using self-refresh includes:
s05', acquiring and storing display data of the first row of sub-pixels corresponding to the display subarea by adopting the self-refreshing driving unit.
S07, providing the saved display data of at least the first row of sub-pixels to the remaining row of sub-pixels of the display sub-region corresponding to the driving unit using self-refresh includes:
s07', providing the saved display data of the first row of sub-pixels to the remaining row of sub-pixels of the display sub-region corresponding to the driving unit employing self-refresh.
Therefore, only the display data of the first row of sub-pixels of the corresponding display sub-region of the self-refreshing driving unit is required to be acquired and stored, the display data of the remaining rows of sub-pixels can be acquired by adopting the stored display data of the first row of sub-pixels, and additional acquisition is not required, so that the transmission of the display data is reduced to the greatest extent, the power consumption is further reduced, and the product quality is improved.
Optionally, after the converting the first picture signal into the second picture signal in S03 and before determining the driving unit that needs to employ self-refresh according to the second picture signal in S04, the self-refresh method further includes:
s10, acquiring a second picture signal so as to facilitate the execution of the subsequent steps.
Further optionally, S10, acquiring a picture signal for setting a self-refresh command includes:
s10', acquiring a second picture signal by adopting a point-to-point protocol.
The point-to-point protocol (P2P) is a data transmission protocol, and has simple use and wide application range.
Optionally, before S01, the first picture signal and the prompt signal are acquired, the self-refresh method further includes:
s20, generating a first picture signal and a prompt signal.
The S20 may be performed by the front-end device. The front-end device may include a central processor (Central Processing Unit, CPU), or a graphics processor (Graphics Processing Unit, GPU).
Optionally, after S01, the first picture signal and the prompt signal are acquired, the self-refresh method further includes:
s30, judging whether the first picture signal is identical with the first picture signal of the previous frame.
And S31, if yes, stopping acquiring the first picture signal of the next frame.
That is, when the first picture signal generated by the front-end device remains unchanged, the acquisition of the continuous multi-frame first picture signal may employ a PSR self-refresh technique to further reduce power consumption.
The PSR self-refreshing technology mainly aims at data transmission between a front-end device and a time sequence control unit, when a first picture signal generated by the front-end device is kept unchanged, the time sequence control unit stops acquiring a first picture signal of a next frame from the front-end device, and the stored first picture signal is adopted.
The embodiment of the invention also provides a display device adopting the self-refresh method, the display device comprises a driving circuit and a display panel, and referring to fig. 1, the display panel 10 comprises a display area 16, the display area comprises a plurality of connected display subareas, and each display subarea comprises a plurality of sub-pixels 15 arranged in an array.
Referring to fig. 2, the driving circuit includes a timing control unit 22 and a plurality of driving units 21 corresponding to a plurality of display sub-areas; the driving unit 21 is electrically connected to the display panel 10 and the timing control unit 22, respectively.
In fig. 1, the display area 16 comprises 4 connected display sub-areas, denoted 11-14, respectively, and the driving circuit comprises 4 driving units 21, denoted IC1, IC2, IC3 and IC4, respectively, wherein IC1 corresponds to the display sub-area 11, IC2 corresponds to the display sub-area 12, IC3 corresponds to the display sub-area 13 and IC4 corresponds to the display sub-area 14. Fig. 1 only schematically shows the structure of the sub-pixels 15 comprised in the display sub-area 11, and the structure of the sub-pixels comprised in other display sub-areas is not shown, and reference is made to the display sub-area 11. It should be noted that the display panel may further include a non-display area, and a part of the circuits in the driving circuit may be disposed in the non-display area, or the driving circuit may be separately disposed on a circuit board, which is not limited herein. In fig. 1, a driving unit 21 is disposed in a non-display area of a display panel, and a timing control unit 22 is disposed on a circuit board 23.
The display device may be a liquid crystal display device of TN (Twisted Nematic), VA (Vertical Alignment), IPS (In-Plane Switching) or ADS (Advanced Super Dimension Switch), or any product or component having a display function, such as a television, a digital camera, a cellular phone, a tablet pc, or the like, including the display device. The display device has the characteristics of low power consumption, long service life and good customer experience.
Optionally, the timing control unit includes a timing controller (Timing Controller, tcon), and the driving unit includes a driving chip (IC).
The type of the driving chip is not limited, and the driving chip can be a chip such as a singlechip, an ARM (Advanced RISC Machines, advanced reduced instruction set computing machine) or an FPGA (Field Programmable Gate Array ), and the like, and can be specifically determined according to actual design requirements.
Optionally, the timing control unit is configured to:
and acquiring a first picture signal and a prompt signal.
And determining whether to adopt the self-refresh mode according to the prompt signal.
If yes, the first picture signal is converted into a second picture signal, wherein a blanking area of the second picture signal comprises a self-refresh command, an effective area of the second picture signal comprises display data of sub-pixels of a plurality of display sub-areas, and the display data of all rows of sub-pixels included in each column in at least one display sub-area are the same.
The above-described timing control unit is of course further configured to:
after the first picture signal and the prompt signal are acquired, whether the first picture signal is identical with the first picture signal of the previous frame is judged.
If yes, stopping acquiring the first picture signal of the next frame.
Then, while the first picture signal generated by the front-end device remains unchanged, the acquisition of the successive multi-frame first picture signal may employ a PSR self-refresh technique to reduce power consumption even further.
The PSR self-refreshing technology mainly aims at data transmission between a front-end device and a time sequence control unit, when a first picture signal generated by the front-end device is kept unchanged, the time sequence control unit stops acquiring a first picture signal of a next frame from the front-end device, and the stored first picture signal is adopted.
Of course, the above-described timing control unit may be further configured to: a data enable signal (DE signal) is generated. Referring to fig. 4, when the data enable signal (DE signal) is at a low level, the timing control unit can be caused to transmit a set command control signal, which is mainly responsible for signal training, output mode setting, pgamma (gamma voltage), etc., for determining the output characteristics of the driving unit. When the data enable signal (DE signal) is at a high level, the driving unit can be caused to receive the display data signal, and as shown in fig. 6, the driving unit receives the display data signal under the effect of the DE signal and the control signal, and sequentially passes through a shift register (S/R) 31, a Latch (Latch) 32, a level shifter (L/S) 33, a digital-to-analog converter (DAC) 34, and a buffer 35 provided therein, and finally outputs a driving voltage signal. The driving voltage signal is transmitted to the sub-pixel 15 through the Data line (Data line) of the display panel, thereby realizing display. In FIG. 6, latch (Latch) 32 includes two stages of latches for storing display data signals; fig. 6 schematically illustrates only a partial structure of the driving unit and the display panel. The display panel may adopt a progressive scanning manner, for example, referring to fig. 6, after the n-1 scanning line is turned on, the n-1 row of sub-pixels 15 can obtain corresponding driving voltages through the Data lines Data1-Data8, so as to realize the display of the n-1 row of sub-pixels 15; and by analogy, after progressive scanning, displaying all the sub-pixels is realized.
Optionally, the plurality of driving units are configured to:
a driving unit which needs to employ self-refresh is determined based on the second picture signal.
And acquiring and storing display data of at least a first row of sub-pixels of the display subarea corresponding to the self-refreshing driving unit.
And stopping acquiring display data of the remaining rows of sub-pixels of the display subarea corresponding to the driving unit adopting self-refresh.
The saved display data of at least the first row of sub-pixels is provided to the remaining row of sub-pixels of the display sub-region corresponding to the driving unit employing self-refresh.
The driving unit may include a driving chip, which may include a shift register (S/R) 31, a Latch (Latch) 32, a level shifter (L/S) 33, a digital-to-analog converter (DAC) 34, and a buffer 35, as shown in fig. 6.
Of course the above-described plurality of drive units may also be configured to: a second picture signal is acquired.
For example, the second picture signal may be acquired using a point-to-point protocol. The point-to-point protocol (P2P) is a data transmission protocol, and has simple use and wide application range.
Optionally, the display device further comprises a front-end device. The front-end device is electrically connected with the timing control unit and is configured to: a first picture signal and a cue signal are generated.
The front-end device may include a central processor (Central Processing Unit, CPU), or a graphics processor (Graphics Processing Unit, GPU).
The specific method of generating the first picture signal and the cue signal is not limited herein. For example, when the current end device determines that the display data included in the first picture signal of the current frame are partially or completely the same, a high-level prompt signal is generated to indicate that a self-refresh mode needs to be adopted; if the display data included in the first picture signal of the current frame are not judged to be partially or completely identical, a low-level prompt signal is generated to indicate that the self-refresh mode is not needed.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (11)
1. The self-refreshing method is characterized by being applied to a display device, wherein the display device comprises a driving circuit and a display panel, the display panel comprises a display area, the display area comprises a plurality of connected display subareas, and each display subarea comprises a plurality of sub-pixels arranged in an array; the driving circuit comprises a plurality of driving units, and the driving units correspond to the display subareas;
the self-refresh method comprises the following steps:
acquiring a first picture signal and a prompt signal;
determining whether to adopt a self-refresh mode according to the prompt signal;
if yes, converting the first picture signal into a second picture signal, wherein a blanking area of the second picture signal comprises a self-refresh command, an effective area of the second picture signal comprises display data of the sub-pixels of a plurality of display subareas, and the display data of all rows of the sub-pixels included in each column in at least one display subarea is the same;
determining the driving unit needing to adopt self-refresh according to the second picture signal;
acquiring and storing display data of at least a first row of the sub-pixels of the display subarea corresponding to the driving unit adopting self-refreshing;
stopping acquiring display data of the sub-pixels of the remaining rows of the display sub-region corresponding to the driving unit adopting self-refresh;
and providing the saved display data of at least the first row of the sub-pixels for the remaining rows of the sub-pixels of the display subarea corresponding to the driving unit adopting self-refresh.
2. The self-refresh method of claim 1, wherein the obtaining and storing display data for at least a first row of the subpixels of the display sub-area for the drive unit employing self-refresh comprises:
acquiring and storing display data of the sub-pixels of the first row corresponding to the display sub-region by adopting the self-refreshing driving unit;
said providing stored display data of at least a first row of said sub-pixels to remaining rows of said sub-pixels of said display sub-region corresponding to said driving unit employing self-refresh comprises:
and providing the saved display data of the first row of the sub-pixels for the remaining row of the display sub-region corresponding to the driving unit adopting self-refresh.
3. The self-refresh method as recited in claim 1, wherein after said converting said first picture signal into a second picture signal and before said determining said driving unit that needs to employ self-refresh based on said second picture signal, said self-refresh method further comprises:
and acquiring the second picture signal.
4. The self-refresh method of claim 3, wherein the acquiring the second picture signal comprises:
and acquiring the second picture signal by adopting a point-to-point protocol.
5. The self-refresh method of claim 1, wherein prior to the acquiring the first picture signal and the cue signal, the self-refresh method further comprises:
and generating the first picture signal and the prompt signal.
6. The self-refresh method of claim 1, wherein after the acquiring the first picture signal and the cue signal, the self-refresh method further comprises:
judging whether the first picture signal is the same as the first picture signal of the previous frame;
if yes, stopping acquiring the first picture signal of the next frame.
7. A display device employing the self-refresh method as recited in any one of claims 1-6, wherein the display device comprises a drive circuit and a display panel;
the display panel comprises a display area, wherein the display area comprises a plurality of connected display subareas, and each display subarea comprises a plurality of sub-pixels which are arranged in an array;
the driving circuit comprises a time sequence control unit and a plurality of driving units, and the driving units correspond to the display subareas; the driving unit is electrically connected with the display panel and the time sequence control unit respectively.
8. The display device according to claim 7, wherein the timing control unit includes a timing controller, and the driving unit includes a driving chip.
9. The display device according to claim 7, wherein the timing control unit is configured to:
acquiring a first picture signal and a prompt signal;
determining whether to adopt a self-refresh mode according to the prompt signal;
if yes, converting the first picture signal into a second picture signal, wherein a blanking area of the second picture signal comprises a self-refresh command, an effective area of the second picture signal comprises display data of the sub-pixels of a plurality of display sub-areas, and display data of all rows of the sub-pixels included in each column of at least one display sub-area are the same.
10. The display device according to claim 9, wherein a plurality of the driving units are configured to:
determining the driving unit needing to adopt self-refresh according to the second picture signal;
acquiring and storing display data of at least a first row of the sub-pixels of the display subarea corresponding to the driving unit adopting self-refreshing;
stopping acquiring display data of the sub-pixels of the remaining rows of the display sub-region corresponding to the driving unit adopting self-refresh;
and providing the saved display data of at least the first row of the sub-pixels for the remaining rows of the sub-pixels of the display subarea corresponding to the driving unit adopting self-refresh.
11. The display device of claim 7, wherein the display device further comprises a front-end device;
the front-end device is electrically connected to the timing control unit and configured to: a first picture signal and a cue signal are generated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011194289.7A CN114446212B (en) | 2020-10-30 | 2020-10-30 | Display device and self-refreshing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011194289.7A CN114446212B (en) | 2020-10-30 | 2020-10-30 | Display device and self-refreshing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114446212A CN114446212A (en) | 2022-05-06 |
| CN114446212B true CN114446212B (en) | 2023-07-18 |
Family
ID=81358389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011194289.7A Active CN114446212B (en) | 2020-10-30 | 2020-10-30 | Display device and self-refreshing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114446212B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004151222A (en) * | 2002-10-29 | 2004-05-27 | Sharp Corp | Liquid crystal display control unit and liquid crystal display device |
| JP2007148431A (en) * | 2000-08-08 | 2007-06-14 | Semiconductor Energy Lab Co Ltd | Driving method of liquid crystal display device, and electronic device |
| CN101322094A (en) * | 2006-03-23 | 2008-12-10 | 一儿童一笔电组织有限公司 | Self-refreshing display controller for a display device in a computational unit |
| CN102148012A (en) * | 2009-12-28 | 2011-08-10 | Nec液晶技术株式会社 | Image display control device, image display device, image display control method, and image display control program |
| CN103151025A (en) * | 2011-12-07 | 2013-06-12 | 谱瑞科技股份有限公司 | Frame buffer management and self-refresh control in a self-refresh display system |
| CN105679279A (en) * | 2016-04-18 | 2016-06-15 | 京东方科技集团股份有限公司 | Self-refreshing display driving device, driving method and display device |
| CN106710539A (en) * | 2015-11-12 | 2017-05-24 | 小米科技有限责任公司 | Liquid crystal display method and device |
| CN106782403A (en) * | 2016-04-12 | 2017-05-31 | 思博半导体股份有限公司 | Low-power consumption display device |
| CN107633796A (en) * | 2016-07-18 | 2018-01-26 | 三星显示有限公司 | Display device and the method for refreshing the image that display device produces |
| CN109817150A (en) * | 2019-03-28 | 2019-05-28 | 京东方科技集团股份有限公司 | A kind of image element driving method, pixel driving device and display device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120207208A1 (en) * | 2011-02-10 | 2012-08-16 | David Wyatt | Method and apparatus for controlling a self-refreshing display device coupled to a graphics controller |
| KR101929426B1 (en) * | 2011-09-07 | 2018-12-17 | 삼성디스플레이 주식회사 | Display device and driving method thereof |
| US9558721B2 (en) * | 2012-10-15 | 2017-01-31 | Apple Inc. | Content-based adaptive refresh schemes for low-power displays |
| JP6366271B2 (en) * | 2013-12-27 | 2018-08-01 | キヤノン株式会社 | Information processing apparatus and control method of information processing apparatus |
| WO2016006544A1 (en) * | 2014-07-11 | 2016-01-14 | シャープ株式会社 | Image display device |
| US9653029B2 (en) * | 2014-08-05 | 2017-05-16 | Apple Inc. | Concurrently refreshing multiple areas of a display device using multiple different refresh rates |
| KR20160033549A (en) * | 2014-09-18 | 2016-03-28 | 삼성전자주식회사 | Image Processing Device and Method including a plurality of image signal processors |
-
2020
- 2020-10-30 CN CN202011194289.7A patent/CN114446212B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007148431A (en) * | 2000-08-08 | 2007-06-14 | Semiconductor Energy Lab Co Ltd | Driving method of liquid crystal display device, and electronic device |
| JP2004151222A (en) * | 2002-10-29 | 2004-05-27 | Sharp Corp | Liquid crystal display control unit and liquid crystal display device |
| CN101322094A (en) * | 2006-03-23 | 2008-12-10 | 一儿童一笔电组织有限公司 | Self-refreshing display controller for a display device in a computational unit |
| CN102148012A (en) * | 2009-12-28 | 2011-08-10 | Nec液晶技术株式会社 | Image display control device, image display device, image display control method, and image display control program |
| CN103151025A (en) * | 2011-12-07 | 2013-06-12 | 谱瑞科技股份有限公司 | Frame buffer management and self-refresh control in a self-refresh display system |
| CN106710539A (en) * | 2015-11-12 | 2017-05-24 | 小米科技有限责任公司 | Liquid crystal display method and device |
| CN106782403A (en) * | 2016-04-12 | 2017-05-31 | 思博半导体股份有限公司 | Low-power consumption display device |
| CN105679279A (en) * | 2016-04-18 | 2016-06-15 | 京东方科技集团股份有限公司 | Self-refreshing display driving device, driving method and display device |
| CN107633796A (en) * | 2016-07-18 | 2018-01-26 | 三星显示有限公司 | Display device and the method for refreshing the image that display device produces |
| CN109817150A (en) * | 2019-03-28 | 2019-05-28 | 京东方科技集团股份有限公司 | A kind of image element driving method, pixel driving device and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114446212A (en) | 2022-05-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7133035B2 (en) | Method and apparatus for driving liquid crystal display device | |
| CN100524434C (en) | Dynamically selecting either frame rate conversion (FRC) or pixel overdrive in an LCD panel based display | |
| KR100613325B1 (en) | Driving apparatus and display module | |
| US5699076A (en) | Display control method and apparatus for performing high-quality display free from noise lines | |
| KR101197057B1 (en) | Display device | |
| JP4501525B2 (en) | Display device and drive control method thereof | |
| US20090267969A1 (en) | Image display device having memory property, driving control device and driving method to be used for same | |
| CN102789771B (en) | Polarity inversion signal conversion method, device and indicating meter | |
| JP2010211187A (en) | Liquid crystal display device and method of driving the same | |
| CN101285949B (en) | LCD device driving method | |
| KR20080076316A (en) | Liquid crystal display | |
| US20140375627A1 (en) | Display device and driving method thereof | |
| CN100595824C (en) | Display drive circuit | |
| US20110234561A1 (en) | Display controller and method for driving liquid crystal display panel | |
| CN113314068A (en) | Display panel driving method and driving device thereof, and display device | |
| CN101320544A (en) | Data processing circuit, LCD and its driving method | |
| KR101283974B1 (en) | Image displaying method for liquid crystal display device | |
| JP2009058684A (en) | Liquid crystal display device | |
| CN114446212B (en) | Display device and self-refreshing method thereof | |
| KR100862122B1 (en) | Scanning signal line driving device, liquid crystal display device, and liquid crystal display method | |
| JP2006267303A (en) | Display apparatus and driving method thereof | |
| KR20120063213A (en) | Liquid crystal display | |
| KR20050105574A (en) | Lcd and driving method thereof | |
| JP2007003558A (en) | Display device with partial display function | |
| US20090153455A1 (en) | Gray insertion device and liquid crystal display |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |