CN106648025B - Screen-off display method and terminal - Google Patents
Screen-off display method and terminal Download PDFInfo
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- CN106648025B CN106648025B CN201610919362.XA CN201610919362A CN106648025B CN 106648025 B CN106648025 B CN 106648025B CN 201610919362 A CN201610919362 A CN 201610919362A CN 106648025 B CN106648025 B CN 106648025B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/32—Means for saving power
- G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
- G06F1/3234—Power saving characterised by the action undertaken
- G06F1/3237—Power saving characterised by the action undertaken by disabling clock generation or distribution
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/32—Means for saving power
- G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
- G06F1/3234—Power saving characterised by the action undertaken
- G06F1/325—Power saving in peripheral device
- G06F1/3265—Power saving in display device
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
Abstract
The embodiment of the invention provides a screen-off display method and a terminal. In the technical scheme provided by the embodiment of the invention, after entering the standby state, the application processor provides display content information of N frames of pictures for the display module at one time and then enters the sleep state, the real-time clock module provides periodic trigger signals for the display module, and the display module sequentially displays the display content of the N frames of pictures according to the trigger signals, so that the display content is updated when the screen is turned off for display. In the process, the application processor is always in the dormant state, so that the application processor is not frequently awakened, and the power consumption loss is reduced.
Description
Technical Field
The invention relates to the technical field of computers, in particular to a screen-off display method and a terminal.
Background
Currently, some intelligent terminals provide an off-screen display (AOD) function. Referring to fig. 1a, the so-called AOD means that after the intelligent terminal enters a standby state, information (e.g. time) can be displayed on only a part of the screen area and other screen areas are maintained in a closed state.
The following description will be made in terms of displaying time in the AOD state. In order to continue displaying time, a timer (alarm) is started after the intelligent terminal enters a standby state. Referring to fig. 1b, every minute, the timer wakes up a main CPU (AP) of the intelligent terminal, the AP sends new display content (generally, time) in the next frame of display picture to a RAM (random access memory) of the display module, and the display module updates the time using the new display content.
For example, when the intelligent terminal enters standby at 10 o ' clock, 12 min and 30 sec, the alarm wakes up the AP once at 10 o ' clock and 13 o ' clock, the AP sends the display content (10: 13) representing the new time in the next frame of display picture to the RAM of the display module, and the display module updates the time to 10: 13. then, the alarm will wake up the AP once at 10 o' clock 14, and the AP will send the display content (10: 14) representing the new time to the RAM of the display module, and the display module will update the time by 10:14, and so on.
Therefore, in the existing screen-off display mode, the AP is frequently awakened, which is not favorable for power saving of the terminal.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method and a terminal for displaying an off screen, so as to reduce the frequency of waking up an AP after entering a standby mode, thereby reducing power loss.
In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:
a screen-off display method is applied to a terminal, the terminal comprises an application processor, a display module and a real-time clock module, and the screen-off display method comprises the following steps:
after entering a standby state, the application processor sends display content information of N frames of pictures to be displayed within a preset time length to the display module at one time, and the application processor enters a sleep mode after sending is completed; wherein N is a positive integer not less than 2;
the display module receives and stores the display content information of the N frames of pictures sent by the application processor;
and when a preset display condition is met, responding to an ith trigger signal from the real-time clock module, and displaying the display content of an ith frame of the N frames of pictures by the display module, wherein i is greater than or equal to 1 and less than or equal to N.
A terminal, comprising:
the application processor is used for sending the display content information of the N frames of pictures to be displayed within a preset time length to the display module at one time after the terminal enters a standby state, and entering a sleep mode after the sending is finished; wherein N is a positive integer not less than 2;
the real-time clock module is used for periodically sending a trigger signal;
the display module is used for receiving and storing the display content information of the N frames of pictures sent by the application processor; and when a preset display condition is met, responding to an ith trigger signal from the real-time clock module, and displaying the display content of an ith frame of the N frames of pictures by the display module, wherein i is greater than or equal to 1 and less than or equal to N.
Based on the screen-off display scheme, in the embodiment of the invention, after the display module enters the standby state, the application processor provides the display content information of the N frames of pictures to the display module at one time, then the display module enters the sleep state, the real-time clock module provides the periodic trigger signal to the display module, and the display module sequentially displays the display content of the N frames of pictures according to the trigger signal, so that the display content is updated when the screen is off for display. In the process, the application processor is always in the dormant state, so that the application processor is not frequently awakened, and the power consumption is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1a is a schematic illustration of a screen-off display;
FIG. 1b is a diagram illustrating a prior art method for displaying a screen-off state;
fig. 2a is an exemplary structure diagram of a terminal according to an embodiment of the present invention;
fig. 2b, 2c, 3a, 3b, 4a, and 4b are exemplary flowcharts of a screen-off display method according to an embodiment of the present invention.
Detailed Description
The invention provides a screen-off display method and a terminal.
The screen-off display method can be applied to mobile terminals (such as smart phones, tablet computers and the like).
Fig. 2a and 2b illustrate an exemplary structure of the terminal, which may include: a timer 1, an Application Processor 2 (AP), a Real Time Clock (RTC) module 3 and a display module 4.
The RTC belongs to a module on the PMIC (Power management IC), is powered by a battery and records the current time value in the real-time clock. The time values may include year, month, day, hour, minute, and second.
In addition to being a clock, in the present invention, the RTC module 3 is also given a new function of providing a trigger signal to the display module 4, which will be described in detail later herein.
In a specific implementation, the RTC module 3 and the display module 4 may be connected through a GPIO (General Purpose input/output) port.
The display module 4 may be an OLED (Organic Light-Emitting Diode) display module.
Fig. 2c shows an exemplary flow of the screen-off display method executed by each module in the terminal, which may include at least the following steps:
s201: after entering the standby state, the application processor 2 transmits the display content information of the N-frame picture to be displayed within a predetermined time period to the display module 4 at a time.
The above N is a positive integer of not less than 2. In one example, N may be 12.
The display content may be time information or other content.
Typically, the screen-out indicates the time of a full minute. Thus, the display content sent by the application processor 2 to the display module 4 may be, for example, 10:13, 10:14, 10:15, 10:16, 10: 17.
It should be noted that, in the embodiment of the present invention, the application processor 2 sends the display content information of multiple frames at a time, whereas in the prior art, the application processor 2 sends the display content information of one frame at a time.
Steps 201 and 200 may be performed simultaneously.
S202: the application processor 2 goes to sleep after the transmission is completed.
S203: the display module 2 stores the display content information of the received N frames of pictures.
More specifically, the display content information of the N-frame picture may be stored in ram (random access memory) of the display module 4.
S204: the RTC module 3 sends periodic trigger signals.
In one example, the RTC module 3 may send the trigger signal every one full minute (e.g., 10: 30, 10: 31).
Each trigger signal may specifically be a rising edge or a falling edge, or the trigger signal may also be a pulse signal.
S205: when the display condition is satisfied, the display module 4 displays the display content of the ith frame of the N frames of pictures in response to the ith trigger signal from the RTC module 3.
In one example, the display condition may include that the timer has not timed out. That is, the terminal may start a timer for timing.
Still referring to fig. 2c, before step 201, the following steps may be further included:
s200: the timer 1 starts counting time after the terminal enters a standby state.
The timer times out when the predetermined time is reached. The predetermined period of time may be set at the time of factory shipment.
In one example, the predetermined length of time may be 12 minutes. Of course, those skilled in the art can also design the predetermined time length to be shorter or longer according to actual needs, and details are not described herein.
In other embodiments of the present invention, the display condition may further include that the terminal is in a standby state. That is, the display condition may include that the timer is not timed out and the terminal is in a standby state.
Alternatively, the display condition may further include that the display screen is not lit. That is, the display condition may include that the timer has not timed out and the display screen has not been lit. This is because the display screen generally lights up after the successful unlocking, and does not need to turn off the display screen again after the successful unlocking. As for the non-lighting of the display screen, the terminal will still be in the off-screen display state, and therefore, the display condition may also include that the display screen is not lighted.
In a specific implementation, there are at least two implementations to implement step 205:
the first mode is as follows: the display module 4 directly displays the display content of the first frame after receiving the display content information of the N frames, displays the display content of the second frame after receiving the trigger signal sent by the real-time clock in a whole minute, displays the display content of the third frame after receiving the trigger signal, and so on.
For example, assuming that N is 4, the smart terminal enters standby at 10 o 12 min 30 sec, and the display content sent by the application processor 2 to the display module 4 may include 10:12, 10:13, 10:14, and 10: 15.
Next, the display module 4 directly displays the display content of the first frame picture-10: 12; then, the real-time clock module 3 will, at 10:13 sending a trigger signal, the display module 4 displaying the display content of the second frame-10: 13 after receiving the trigger signal, and then the real-time clock module 3 will display the display content of the second frame at 10:14, sending a trigger signal, and displaying the display content of a third frame of picture-10: 14 by the display module 4 after receiving the trigger signal; after that, the real-time clock module 3 will be at 10:15 sending a trigger signal, and after receiving the trigger signal, the display module 4 displaying the display content-10: 15 of the fourth frame.
The second way is: the first frame of display content is the time for entering the standby state, after entering the standby state, the real-time clock module 3 sends a trigger signal to the display module, the display module 4 displays the display content of the first frame of picture, then, the real-time clock module 3 sends the trigger signal once every one whole minute, and the display module 4 correspondingly displays the display content of the next frame of picture.
For example, assuming that N is 4, the smart terminal enters standby at 10 o 12 min 30 sec, and the display content sent by the application processor 2 to the display module 4 may include 10:12, 10:13, 10:14, and 10: 15.
After entering a standby state, the real-time clock module 3 immediately sends a trigger signal to the display module, and the display module 4 displays the display content of the first frame picture in response to the trigger signal, namely 10: 12; then, the real-time clock module 3 will, at 10:13 sending a trigger signal, the display module 4 displaying the display content of the second frame-10: 13 after receiving the trigger signal, and then the real-time clock module 3 will display the display content of the second frame at 10:14, sending a trigger signal, and after receiving the trigger signal, the display module 4 displays the display content of the third frame, namely 10: 14; after that, the real-time clock module 3 will be at 10:15 sends a trigger signal, and the display module 4 displays the display content of the fourth frame, 10:15, after receiving the trigger signal.
It can be seen that, in this embodiment, after entering the standby state, the application processor enters the sleep mode after providing the display content information of the N frames of pictures to the display module at one time, and provides the periodic trigger signal to the display module through the real-time clock module, and the display module sequentially displays the display content of the N frames of pictures according to the trigger signal, thereby implementing the update of the display content when the screen is turned off for display. In the process, the application processor is always in the dormant state, so that the application processor is not frequently awakened, and the power consumption is reduced.
Fig. 3 shows another exemplary flow of the screen-off display method executed by each module in the terminal, and unlike the embodiment shown in fig. 2c, this embodiment provides a processing manner after the timer expires.
Referring to fig. 3, the present embodiment at least includes the following steps:
s300: the timer 1 starts counting time after the terminal enters a standby state.
S301: after entering the standby state, the application processor 2 transmits the display content information of the N-frame picture to be displayed within a predetermined time period to the display module 4 at a time.
The above N is a positive integer of not less than 2. In one example, N may be 12.
S302: the application processor 2 goes to sleep after the transmission is completed.
S303: the display module 2 stores the display content information of the received N frames of pictures.
S304: the RTC module 3 sends periodic trigger signals.
S305: when the display condition is satisfied, the display module 4 displays the display content of the ith frame screen in response to the ith trigger signal from the RTC module 3.
S300 to S305 are the same as S200 to S205, and are not described herein.
S306: when the timer 1 is overtime and the terminal is still in the standby state, the timer 1 wakes up the application processor 2 and restarts timing after waking up.
For example, assuming that the preset time duration is 12 minutes, the timer 1 times out after counting 12 minutes, and if the application processor is still in the standby state at this time, the timer 1 will wake up the application processor, and the application processor executes the following step S307. The timer 1 counts again.
Of course, when the user unlocks before 12 minutes, the timer 1 is turned off.
S307: the woken-up application processor 2 once again sends the display content information of the N frames of pictures to be displayed within the predetermined time length to the display module 4.
S308: the woken-up application processor 2 goes to sleep after the transmission is completed.
S309: the display module 2 stores the display content information of the received N frames of pictures.
S310: the RTC module 3 sends periodic trigger signals.
S311: when the display condition is satisfied, the display module 4 displays the display content of the ith frame screen starting from the first frame of the N frame screens in response to the ith trigger signal from the RTC module 3.
It should be noted that step S307 is similar to S301 or S201, step S308 is similar to S302 or S202, step S309 is similar to S303 or S203, step S310 is similar to S304 or S204, and step S311 is similar to S305 or S205.
Therefore, referring to fig. 3b, the step S307 is executed, which is equivalent to returning to the step S301.
The processing performed by the user to unlock during the screen-out display will be described below.
Please refer to fig. 4a, which at least includes the following steps:
S400-S411 are the same as S300-S311, and are not described in detail herein.
S412: and after the terminal is unlocked, the display module 4 clears the display content information stored in the ram.
In addition, the user successfully unlocks, the AP2 wakes up, and the timer 1 will also turn off.
Alternatively, please refer to fig. 4b, which at least includes the following steps:
s400: the timer 1 starts counting time after the terminal enters a standby state.
S401: after entering the standby state, the application processor 2 transmits the display content information of the N-frame picture to be displayed within a predetermined time period to the display module 4 at a time.
The above N is a positive integer of not less than 2. In one example, N may be 12.
S402: the application processor 2 goes to sleep after the transmission is completed.
S403: the display module 2 stores the display content information of the received N frames of pictures.
S404: the RTC module 3 sends periodic trigger signals.
S405: when the display condition is satisfied, the display module 4 displays the display content of the ith frame screen in response to the ith trigger signal from the RTC module 3.
S400 to S405 are the same as S300 to S305, and are not described herein.
S406: when the timer 1 is overtime and the terminal is still in the standby state, the timer 1 wakes up the application processor 2, and the application processor 2 returns to execute the step 401; the timer 1 restarts timing;
s412: and the user successfully unlocks, and the display module 4 clears the display content information stored in the local ram.
In addition, the user successfully unlocks, the AP2 wakes up, and the timer 1 will also turn off.
More specifically, the awakened AP2 may notify the timer 1 to turn off and notify the display module 4 to empty the display content information stored in the local ram.
Since the AP2 will wake up regardless of whether the user unlock was successful. Therefore, in other embodiments, the AP2 may also return to performing step 401 if the user fails to unlock.
A terminal for performing the above-mentioned off-screen display method will be described below, and referring still to fig. 2a, the terminal may include:
the application processor 2 is configured to send display content information of the N frames of pictures to be displayed within the predetermined time to the display module 4 at one time after the terminal enters the standby state, and enter the sleep mode after the sending is completed; n is a positive integer not less than 2;
the real-time clock module 3 is used for periodically sending a trigger signal;
the display module 4 is used for receiving and storing the display content information of the N frames of pictures sent by the application processor; and when the preset display condition is met, responding to the ith trigger signal from the real-time clock module 3, and displaying the display content of the ith frame of the N frames of pictures, wherein i is greater than or equal to 1 and less than or equal to N.
More specifically, the real-time clock module 3 and the display module 4 may be connected via a general purpose input/output port.
And the display content information of the N frames of pictures is stored in the ram of the display module.
For details, please refer to the description of the method section herein, which is not described herein.
In one example, the display condition may include at least that the timer has not timed out. That is, the terminal may start a timer for timing. Still referring to fig. 2a, the terminal may comprise a timer 1 for starting to count time after the terminal enters the standby state and timeout when the predetermined time length is reached.
In other embodiments of the present invention, the timer 1 may also be configured to wake up the application processor 2 when the time is out and the terminal is still in the standby state, and restart the timer after the application processor is woken up.
Correspondingly, the woken-up application processor 2 may be further configured to once again send, to the display module 4, display content information of the N frames of pictures that needs to be displayed within a predetermined time period, and enter a sleep mode after the sending is completed.
For details, please refer to the description of the method section herein, which is not described herein.
In other embodiments of the present invention, the display module 4 is further configured to: and if the unlocking is successful, clearing the display content information stored in the local ram.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A screen-off display method is applied to a terminal, the terminal comprises an application processor, a display module and a real-time clock module, and the screen-off display method comprises the following steps:
after entering a standby state, the application processor sends display content information of N frames of pictures to be displayed within a preset time length to the display module at one time, and the application processor enters a sleep mode after sending is completed; wherein N is a positive integer not less than 2;
the display module receives and stores the display content information of the N frames of pictures sent by the application processor;
when a preset display condition is met, responding to an ith trigger signal from the real-time clock module, and displaying the display content of an ith frame of the N frames of pictures by the display module, wherein i is greater than or equal to 1 and less than or equal to N;
further comprising:
when the timer is overtime and the terminal is still in a standby state, the timer wakes up the application processor and restarts timing after waking up;
and the awakened application processor sends the display content information of the N frames of pictures to be displayed within a preset time length to the display module once again, and enters the sleep mode after the sending is finished.
2. The method of claim 1, wherein the display condition comprises: and the timer is not overtime, starts timing after the terminal enters the standby state, and is overtime when the preset time length is reached.
3. The method of claim 1 or 2,
the display content information of the N frames of pictures is stored in a random access memory of the display module;
the screen-off display method further comprises:
and if the unlocking is successful, emptying the display content information stored in the random access memory.
4. The method according to claim 1, characterized in that said trigger signal is in particular: trigger signal for a whole minute.
5. The method of claim 1, wherein the display condition further comprises: the terminal is in a standby state or the display screen is not lighted.
6. A terminal, comprising:
the application processor is used for sending the display content information of the N frames of pictures to be displayed within a preset time length to the display module at one time after the terminal enters a standby state, and entering a sleep mode after the sending is finished; wherein N is a positive integer not less than 2;
the real-time clock module is used for periodically sending a trigger signal;
the display module is used for receiving and storing the display content information of the N frames of pictures sent by the application processor; when a preset display condition is met, responding to an ith trigger signal from the real-time clock module, and displaying the display content of an ith frame of the N frames of pictures, wherein i is greater than or equal to 1 and less than or equal to N;
further comprising:
the timer is used for awakening the application processor when the time is out and the terminal is still in a standby state, and restarting timing after awakening;
and the awakened application processor is further used for sending the display content information of the N frames of pictures which needs to be displayed within the preset time length to the display module once again, and entering the sleep mode after the sending is finished.
7. The terminal of claim 6, further comprising:
the timer is also used for starting timing after the terminal enters a standby state and overtime when the preset time length is reached;
the display conditions include: the timer has not timed out.
8. The terminal of claim 7,
the timer is also used for awakening the application processor when the time is out and the terminal is still in a standby state, and restarting timing after awakening;
and the awakened application processor is further used for sending the display content information of the N frames of pictures which needs to be displayed within the preset time length to the display module once again, and entering the sleep mode after the sending is finished.
9. The terminal of claim 6,
the display content information of the N frames of pictures is stored in a random access memory of the display module;
the display module is further configured to: and if the unlocking is successful, emptying the display content information stored in the random access memory.
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| CN201610919362.XA CN106648025B (en) | 2016-10-20 | 2016-10-20 | Screen-off display method and terminal |
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| CN201610919362.XA CN106648025B (en) | 2016-10-20 | 2016-10-20 | Screen-off display method and terminal |
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