CN115482798A - Low-frequency driving method and device for solving display refresh lag - Google Patents
Low-frequency driving method and device for solving display refresh lag Download PDFInfo
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- CN115482798A CN115482798A CN202110661915.7A CN202110661915A CN115482798A CN 115482798 A CN115482798 A CN 115482798A CN 202110661915 A CN202110661915 A CN 202110661915A CN 115482798 A CN115482798 A CN 115482798A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 claims description 14
- 230000011664 signaling Effects 0.000 claims description 3
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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
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/36—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of a graphic pattern, e.g. using an all-points-addressable [APA] memory
- G09G5/39—Control of the bit-mapped memory
- G09G5/393—Arrangements for updating the contents of the bit-mapped memory
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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
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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- 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
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a low-frequency driving method and a device for solving display refresh lag, comprising the following steps: the refreshing signal controls the display driving unit to display the data in the display RAM on the display screen; the refreshing signal comprises a preset low-frequency refreshing signal and a refreshing signal for displaying the data updating of the RAM. According to the invention, by adding the function of updating and detecting the data of the display RAM, the refreshing of the display data is directly started at the first time after the data of the display RAM is updated, and the display is not required to be updated and displayed when the next preset refreshing is carried out, so that the data of the display RAM can be displayed on the display screen as soon as possible. After the display screen is refreshed, refreshing is still carried out according to the originally preset low-frequency refreshing signal. The invention solves the problem of display lag under low-frequency drive, ensures lower display power consumption and does not influence the requirement of low display power consumption.
Description
Technical Field
The invention belongs to the technical field of screen display, and particularly relates to a low-frequency driving method and device for solving display refresh lag.
Background
In an intelligent terminal system, because a display screen is often used for displaying, the power consumption of the display screen generally reaches more than half. In order to reduce the power consumption of the display screen, various methods are adopted, one of which is to adopt low-frequency driving to reduce the frame frequency display scanning driving frequency, generally, the low-frequency driving can make the frame frequency below 1HZ, and sometimes, in order to further reduce the display power consumption of the display screen, the frame frequency is set to 1/4HZ for display scanning driving, or even lower. Taking 1/4HZ as an example, the data of the display RAM needs to be updated once every 4 seconds and the display screen is driven by the display drive IC to refresh the display, if the data of the RAM has display data updated just after the display screen is refreshed, the display drive IC can refresh the updated display content only by waiting for about 4S, the display lag is serious, and the display effect is affected.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a low-frequency driving method and device for solving the display refresh lag, so that the display lag problem is solved, and the requirement of low power consumption of display is not greatly influenced.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
a low frequency driving method for solving display refresh lag is provided, which comprises the following steps:
the refreshing signal controls the display driving unit to display the data in the display RAM on the display screen;
the refreshing signal comprises a preset low-frequency refreshing signal and a refreshing signal when the data of the display RAM is updated.
Furthermore, a refresh signal is sent by the detection module when the data in the display RAM is updated, the detection module is used for detecting whether the data in the display RAM is updated or not, when the data in the display RAM is updated, the refresh signal is sent to the display driving unit for immediate refresh, the data in the display RAM is displayed on the display screen, and when the data in the display RAM is not updated, the display driving unit refreshes according to a preset low-frequency refresh signal.
Preferably, when the data in the display RAM is updated and the display driving unit is refreshed instantly, the time interval between the next refresh of the display driving unit and the current refresh of the display driving unit is equal to the refresh cycle of the preset low-frequency refresh signal, and then the refresh of the display driving unit is refreshed according to the preset low-frequency refresh signal, that is, when the display driving unit is refreshed instantly each time, the refresh cycle is cleared and is reset, and then the display driving unit is still refreshed according to the preset low-frequency refresh signal.
Preferably, after the display driving unit is refreshed instantly, the time interval between the next refresh and the instant refresh of the display driving unit is smaller than the refresh period of the preset low-frequency refresh signal, and then the refresh of the display driving unit is refreshed according to the preset low-frequency refresh signal, that is, during each instant refresh, the refresh period is kept timed, and then the display driving unit is refreshed according to the preset low-frequency refresh signal.
Further, the display RAM is integrated in a display driver IC, the display driver IC is internally provided with the display RAM, and the display driver IC is integrated with the display driver unit.
Preferably, the preset low-frequency refresh signal is less than or equal to 1HZ.
The present invention also provides a low frequency driving apparatus for solving display refresh lag, comprising:
a display RAM for receiving display data;
the display refreshing control module is used for outputting a refreshing signal and controlling the refreshing frequency of the display screen;
the detection module is used for detecting whether the data in the display RAM is updated or not and outputting a refreshing signal when the data in the display RAM is updated;
the display driving unit is used for driving the display screen and displaying the data in the display RAM on the display screen;
the display refreshing control module outputs a preset low-frequency refreshing signal to the display driving unit to control the display driving unit to work, when the detection module detects that data in the display RAM is updated, the display refreshing control module sends a refreshing signal to the display driving unit to refresh the display screen immediately, and then the display driving unit continues refreshing according to the preset low-frequency refreshing signal.
Further, the display RAM and the display driving unit are integrated in a display driver IC, and the display driver IC is bound on the display screen.
Further, the display driver IC is connected to the main control board through the FPC, the main control board at least includes an MCU and a program memory, the program memory is used to store a program, and the MCU is at least used to communicate with the display driver IC and transmit image data to be displayed to the display RAM of the display driver IC.
Preferably, the preset low-frequency refresh signal is less than or equal to 1HZ.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
according to the invention, by adding the function of updating and detecting the data of the display RAM, the refreshing of the display data is directly started at the first time after the data of the display RAM is updated, and the display is not required to be updated and displayed when the next preset refreshing is carried out, so that the data of the display RAM can be displayed on the display screen as soon as possible. After the display screen is refreshed, refreshing is still carried out according to the originally preset low-frequency refreshing signal. The invention solves the problem of display lag under low-frequency drive, ensures lower display power consumption and does not influence the requirement of low display power consumption.
Drawings
FIG. 1 is a schematic diagram of the hardware structure of the low frequency driving apparatus of the present invention;
FIG. 2 is a flow chart of an embodiment 1 of the low frequency driving method of the present invention;
FIG. 3 is a flow chart of embodiment 2 of the low frequency driving method of the present invention;
Detailed Description
The present invention will be described in further detail with reference to the following drawings but the present invention is not limited to these embodiments, and in the following detailed description of the invention, some specific details are described to facilitate the understanding of the invention by those skilled in the art, and it is needless to say that the present invention may be completely understood by those skilled in the art without these detailed descriptions, and some well-known hardware, methods, procedures, flows, etc. are not described in detail to avoid the confusion.
Example 1
The present embodiment provides a low frequency driving method that solves display refresh lag. The method is characterized in that on the basis of low-frequency refreshing of a display screen, refreshing is added once when the data of a display RAM is updated, so that the updated display data is updated and displayed in time, the problem of display lag is solved, the originally set low-frequency refreshing frequency is not changed, and the low power consumption of the display is further ensured.
Fig. 2 is a flowchart of a low-frequency driving method provided in embodiment 1 of the present invention, which includes the following specific steps:
step S401, the display driving unit refreshes according to a preset low-frequency refreshing signal, the display driving unit is controlled by the refreshing signal, and data in the display RAM are displayed on a display screen;
step S402, detecting and displaying data in the RAM, wherein the detection is completed by a detection module;
step S403, determining whether the data in the display RAM is updated, if yes, performing step S403, otherwise, performing step S401; the step is to judge the data updating in the display RAM and select to execute different steps according to the data updating condition in the display RAM;
step S404, the display driving unit refreshes instantly, which is a subsequent execution step of data updating in the display RAM, namely when the data in the display RAM is updated, a refresh signal is sent to the display driving unit for refreshing instantly, and the data in the display RAM is displayed on a display screen;
and S405, resetting and re-timing the refresh cycle, namely resetting and re-timing the preset low-frequency refresh cycle, and then refreshing the display driving unit according to a preset low-frequency refresh signal.
In this embodiment, the refresh signal of the display driving unit has two sources, one of which is a preset low-frequency refresh signal that is a preset refresh signal with a fixed frequency and can meet the requirement of low power consumption of the display, and the other of which is a refresh signal when the RAM data is updated, the refresh signal being a refresh signal added in addition to the preset low-frequency refresh signal, the refresh signal being located in a certain refresh period of the preset low-frequency refresh signal, that is, the time interval between the next refresh and the instant refresh of the display driving unit is smaller than the refresh period of the preset low-frequency refresh signal, the instant refresh may be one time or two times or more, when the data in the display RAM is not updated, the display driving unit refreshes according to the preset low-frequency refresh signal, when the data in the display RAM is updated, the display driving unit increases the instant refresh, displays the data in the display on the display screen, the refresh cycle is immediately reset, that is immediately reset when the refresh cycle is reset, and the refresh is performed when the timing is up, that is later, the display driving unit still performs the refresh according to the preset low-frequency refresh signal.
Based on the prior art, the display RAM is integrated in the display driver IC, and is a built-in display RAM of the display driver IC, and the display driver IC is also integrated with the display driver unit, so that external adaptation is facilitated.
In order to ensure low display power consumption, the preset low-frequency refreshing signal is less than or equal to 1HZ.
Example 2
Fig. 3 is a flowchart of a low-frequency driving method provided in embodiment 2 of the present invention, which includes the following specific steps:
step S501, the display driving unit refreshes according to a preset low-frequency refreshing signal;
step S502, detecting and displaying data in the RAM;
step S503, judging whether the data in the display RAM is updated, if so, executing step S503, otherwise, executing step S501;
step S504, the display driving unit is refreshed instantly;
step S505, this refresh cycle continues to count time.
Different from embodiment 1, in this embodiment, when the data in the display RAM is updated and the timing refresh is performed, the refresh cycle is not cleared but continues to be timed, that is, the instant refresh does not affect the predetermined low frequency refresh, and the instant refresh of the display driving unit is an additionally added refresh and has a high priority.
Fig. 1 is a schematic diagram of a hardware structure of the above embodiment of the invention, and referring to fig. 1, the low frequency driving apparatus includes
A display RAM 201 for receiving display data;
the display refresh control module 203 is used for outputting a refresh signal and controlling the refresh frequency of the display screen;
a detection module 202, configured to detect whether data in the display RAM is updated, and output a refresh signal when the data in the display RAM is updated;
a display driving unit 204 for driving the display screen and displaying the data in the display RAM on the display screen;
the display refreshing control module outputs a preset low-frequency refreshing signal to the display driving unit to control the display driving unit to work, when the detection module detects that data in the display RAM is updated, the display refreshing control module sends a refreshing signal to the display driving unit to refresh the display screen immediately, and then the display driving unit continues refreshing according to the preset low-frequency refreshing signal. When the detection module outputs the refresh signal, the detection module sends a signal to the display refresh control module to control the refresh cycle, wherein one is to clear the refresh cycle and count again, and the other is to keep counting. The judgment of the update of the display RAM data belongs to the common knowledge of the skilled person and is not described in detail here.
In order to facilitate the user's use and control, and to adapt to more display devices, the display RAM and the display driving unit according to the present invention are integrated in the display driving IC 200, and the display driving IC is bound to the display screen 300. The display driver IC is connected to the main control board 100 through the FPC, the main control board at least includes an MCU and a program memory, the program memory is used to store a program, and the MCU is at least used to communicate with the display driver IC and transmit image data to be displayed to the display RAM of the display driver IC.
In order to guarantee the requirement of displaying low power consumption, the preset low-frequency refreshing signal is less than or equal to 1HZ.
Claims (10)
1. A low frequency driving method for addressing display refresh lag, comprising:
the refreshing signal controls the display driving unit to display the data in the display RAM on the display screen;
the refreshing signal comprises a preset low-frequency refreshing signal and a refreshing signal for displaying the data updating of the RAM.
2. A low frequency driving method to solve display refresh lag according to claim 1, wherein: the refreshing signal is sent by the detection module when the data in the display RAM are updated, the detection module is used for detecting whether the data in the display RAM are updated or not, when the data in the display RAM are updated, the refreshing signal is sent to the display driving unit for immediate refreshing, the data in the display RAM are displayed on the display screen, and when the data in the display RAM are not updated, the display driving unit refreshes according to a preset low-frequency refreshing signal.
3. A low frequency driving method to solve display refresh lag according to claim 2, wherein: when the data in the display RAM is updated and the display driving unit is instantly refreshed, the time interval between the next refreshing of the display driving unit and the instant refreshing of the display driving unit is equal to the refreshing period of the preset low-frequency refreshing signal, then the refreshing of the display driving unit is refreshed according to the preset low-frequency refreshing signal, namely, during each instant refreshing, the refreshing period is reset and is reset, and then the display driving unit is refreshed according to the preset low-frequency refreshing signal.
4. A low frequency driving method to solve the display refresh hysteresis according to claim 2, wherein: after the display driving unit is refreshed instantly, the time interval between the next refreshing and the instant refreshing of the display driving unit is smaller than the refreshing period of the preset low-frequency refreshing signal, and then the refreshing of the display driving unit is refreshed according to the preset low-frequency refreshing signal, namely when the display driving unit is refreshed instantly each time, the refreshing period is continuously timed, and then the display driving unit is refreshed according to the preset low-frequency refreshing signal.
5. A low frequency driving method to solve display refresh hysteresis according to any one of claims 1 to 4, wherein: the display RAM is integrated in a display driver IC, a display RAM is arranged in the display driver IC, and the display driver IC is integrated with a display driver unit.
6. A low frequency driving method to solve display refresh lag according to claim 5, wherein: the preset low-frequency refreshing signal is less than or equal to 1HZ.
7. A low frequency driving apparatus that addresses display refresh lag, comprising:
a display RAM for receiving display data;
the display refreshing control module is used for outputting a refreshing signal and controlling the refreshing frequency of the display screen;
the detection module is used for detecting whether the data in the display RAM is updated or not and outputting a refresh signal when the data in the display RAM is updated;
the display driving unit is used for driving the display screen and displaying the data in the display RAM on the display screen;
when the detection module detects that the data in the display RAM is updated, the display drive unit sends a refresh signal to the display drive unit to refresh the display screen immediately, and then the display drive unit continues to refresh according to the preset low-frequency refresh signal.
8. A low frequency driving apparatus for solving display refresh hysteresis according to claim 7, wherein: the display RAM and the display driving unit are integrated in a display driving IC, and the display driving IC is bound on a display screen.
9. A low frequency driving apparatus for solving display refresh lag as defined in claim 8, wherein: the display driver IC is connected with the main control board through the FPC, the main control board at least comprises an MCU and a program memory, the program memory is used for storing programs, and the MCU is at least used for communicating with the display driver IC and transmitting image data to be displayed to a display RAM of the display driver IC.
10. A low frequency driving apparatus for solving display refresh lag according to any one of claims 7 to 9, wherein: the preset low-frequency refreshing signal is less than or equal to 1HZ.
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| CN202110661915.7A CN115482798A (en) | 2021-06-15 | 2021-06-15 | Low-frequency driving method and device for solving display refresh lag |
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| CN202110661915.7A CN115482798A (en) | 2021-06-15 | 2021-06-15 | Low-frequency driving method and device for solving display refresh lag |
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