CN103366702A - Quick response method for LCD in standby and mobile terminal - Google Patents
Quick response method for LCD in standby and mobile terminal Download PDFInfo
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- CN103366702A CN103366702A CN2013102327719A CN201310232771A CN103366702A CN 103366702 A CN103366702 A CN 103366702A CN 2013102327719 A CN2013102327719 A CN 2013102327719A CN 201310232771 A CN201310232771 A CN 201310232771A CN 103366702 A CN103366702 A CN 103366702A
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Abstract
The invention discloses a quick response method for an LCD in standby and a mobile terminal, wherein the mobile terminal comprises a central processing unit, a voltage comparator, a backlight, an LCD and a power button, the central processing unit is electrically connected with the power button, the voltage comparator, the backlight and the LCD; the voltage comparator is used for receiving a preset startup threshold voltage and a voltage value input by the power button, the central processing unit is aroused when the voltage comparator detects that the level of one end, which is connected with the central processing unit, of the power button is lower than the startup threshold voltage, a flag of LCD initialization completion is set, the LCD is started to perform initialization, whether the LCD initialization is completed is inquired when the mobile terminal is judged to be pressed, the backlight is controlled to be turned on after the LCD initialization is confirmed to be completed, or else the LCD is closed, the voltage comparator is powered, and the mobile terminal enters into a standby mode. The LCD can be quickly lightened by the mobile terminal when the power button is judged to be pressed, thus a user can feel the response sensitivity of the LCD.
Description
Technical field
The present invention relates to the mobile terminal LCD display technique, LCD responds fast when relating in particular to a kind of standby method and portable terminal.
Background technology
At present, portable terminal tends to LCD is closed when system standby, need to just wake it up rear unlatching demonstration from holding state during use, and portable terminal needs about half second from standby to waking up to LCD appearance demonstration is general, and the response time is slower.For example, portable terminal is pressed by the detection button and detects once complete pressing the process need long period, take the key Pen-down detection of Low level effective as example, the key voltage sequential schematic diagram that LCD lights that is pressed when Fig. 1 shows the prior art mobile terminal standby, key at first has shake when being pressed, one section stable low level afterwards, when keeping certain hour, stable low level thinks that key is pressed, then wake central processing unit up and carry out the LCD initialization, open again backlightly, show thereby light LCD.As seen, portable terminal does not carry out other events to key in the low level time scope necessarily stablizing, the initial work of LCD is just to begin after the affirmation key is pressed, cause LCD to occur showing and need the long period, response time is slower, bring the sensation of portable terminal low-response to the user, affected user's experience.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art part, the present invention is for addressing the deficiencies of the prior art and deficiency, propose a kind ofly can improve LCD response speed under the mobile terminal in standby state, the LCD that improves user's experience fast response method and use the portable terminal of the method.
The technical scheme that technical solution problem of the present invention adopts is as follows:
The method that LCD responds fast during a kind of standby starts LCD when being used for mobile terminal standby, comprise the steps:
Set in advance the start threshold voltage to voltage comparator;
After portable terminal enters standby, portable terminal central processing unit enable voltage comparer;
When detecting, described voltage comparator wakes central processing unit when level that key connects central processing unit one end is lower than described start threshold voltage up;
Central processing unit forbidden energy voltage comparator arranges the complete sign of LCD initialization, and startup LCD carries out initialization;
Judge whether the mobile terminal-opening key is pressed, whether initialization is complete for inquiry LCD when confirming that the mobile terminal-opening key is pressed;
When the LCD initialization was complete, backlight was opened in control, otherwise closes LCD, enables described voltage comparator, makes portable terminal enter holding state.
As further improvement, setting in advance the start threshold voltage is that described key connects half of central processing unit one end high level voltage.
Described key is portable terminal can wake by this button portable terminal up under ideal case button.
The described LCD of setting initialization is complete is masked as that initialization is complete to be set to 1, otherwise this zone bit is set to 0.
Judge the mobile terminal-opening key concrete following steps that adopt that whether are pressed: after level that key connects central processing unit one end is lower than the described start threshold voltage schedule time, confirm that then the mobile terminal-opening key is pressed, otherwise judge that key is not pressed, enable described voltage comparator, make portable terminal enter holding state.
The schedule time that the level of described key connection central processing unit one end is lower than described start threshold voltage is 100 milliseconds.
The present invention also provides a kind of portable terminal, and the LCD when adopting aforesaid standby is the method for response fast, and wherein, this portable terminal comprises central processing unit, voltage comparator, backlight, LCD and key; Described central processing unit is electrically connected with key, voltage comparator, backlight and LCD;
One end of described key is electrically connected with described central processing unit, voltage comparator, and is electrically connected with Input voltage terminal by pull-up resistor, other end ground connection;
Described central processing unit is electrically connected output enable or disable signal with described voltage comparator;
Described central processing unit is electrically connected with described LCD and backlight, is used for controlling described LCD and backlight;
Described voltage comparator be used for to receive the start threshold voltage that sets in advance and the magnitude of voltage of described key input;
When detecting, voltage comparator wakes central processing unit when level that key connects central processing unit one end is lower than described start threshold voltage up, the complete sign of LCD initialization is set and starts LCD and carry out initialization, when judging that portable terminal is pressed, whether initialization is complete for inquiry LCD, backlight is opened in the complete rear control of affirmation LCD initialization, otherwise close LCD, enable described voltage comparator, make portable terminal enter holding state.
As further improvement, described central processing unit comprises key detecting unit, backlight control unit, LCD control module and voltage comparator control module;
Whether described key detecting unit is pressed for detection of key;
Described backlight control unit is used for the unlatching of control backlight;
Described LCD control module is used for control LCD and carries out initialization;
The level that described voltage comparator control module is used for being connected an end with central processing unit according to key compares with default start threshold voltage, and feeds back signal to described central processing unit according to comparative structure and control LCD and carry out initialization.
Described start threshold voltage is that described key connects half of central processing unit one end high level voltage.
Compared with prior art, the present invention adopts set threshold voltage to determine that namely opening LCD by central processing unit after key is pressed carries out initialization, then judge that the height of key one terminal voltage judges whether key is pressed, when being pressed, definite key detects initialized state of LCD, after the LCD initialization is complete, namely open backlight and open LCD, this is so that portable terminal can be lighted rapidly LCD when detecting key and be pressed, make the user feel that LCD is quick on the draw, improved the experience that the user uses portable terminal.
Description of drawings
The voltage sequential schematic diagram of LCD response when Fig. 1 is the prior art mobile terminal standby.
The workflow diagram of the method preferred embodiment that LCD responded fast when Fig. 2 was standby of the present invention.
The voltage sequential schematic diagram of LCD response in the method preferred embodiment that LCD responded fast when Fig. 3 was standby of the present invention.
The voltage sequential schematic diagram that key is not considered to press in the method preferred embodiment that LCD responded fast when Fig. 4 was standby of the present invention.
Fig. 5 is the logical organization schematic diagram of portable terminal preferred embodiment of the present invention.
Fig. 6 is the circuit structure schematic diagram of portable terminal preferred embodiment of the present invention.
Fig. 7 is the logical organization schematic diagram of portable terminal preferred embodiment central processing unit of the present invention.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, clear and definite, developing simultaneously referring to accompanying drawing, the present invention is described in more detail for embodiment.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
For after the key that makes portable terminal is pressed, system can start sooner central processing unit control LCD and open, the method that LCD responded fast when the present invention proposed a kind of mobile terminal standby, the inventive method principle is, when mobile terminal-opening key one end jumps to low level, wake central processing unit control LCD when key is pressed up and carry out initial work not being identified, because the initial work of LCD is started working when whether the affirmation key is pressed, when confirming that key is pressed, central processing unit can shorten LCD and be initialised to the time that the control backlight is opened, and can improve significantly the response speed of portable terminal LCD under holding state.
As shown in Figure 2, the inventive method specifically comprises the steps: based on the preferred embodiment of above principle
S100 sets in advance the start threshold voltage to voltage comparator; Setting in advance the start threshold voltage is that described key connects half of central processing unit one end high level voltage.
S200, after portable terminal enters standby, portable terminal central processing unit enable voltage comparer;
S300 wakes central processing unit up when described voltage comparator detects when level that key connects central processing unit one end is lower than described start threshold voltage; Described key is portable terminal can wake by this button portable terminal up under ideal case button.Fig. 3 shows the voltage sequential chart of LCD response, as shown in Figure 3, when the level of key connection central processing unit one end begins redirect by high level, there is shake at initial stage, when level value is lower than start threshold voltage vt h, the voltage comparator feedback signal is waken central processing unit up, and central processing unit namely begins to carry out the LCD initial work.
S400, central processing unit forbidden energy voltage comparator arranges the complete sign of LCD initialization, and startup LCD carries out initialization; The described LCD of setting initialization is complete is masked as that initialization is complete to be set to 1, otherwise this zone bit is set to 0.The complete sign of LCD initialization is set is system can judge LCD according to this sign whether initialization is complete.
S500 judges whether the mobile terminal-opening key is pressed, and whether initialization is complete for inquiry LCD when confirming that the mobile terminal-opening key is pressed; Judge that whether key is pressed is to be in stable low level by the level that key connects central processing unit one end to reach certain Preset Time and confirmed afterwards, think namely that key is pressed when low level is stable after reaching certain hour, otherwise think that key is not pressed, Fig. 4 shows the voltage sequential chart that the key low level does not reach certain hour, as can be seen from Figure 4, the stable low level state of key does not reach certain hour, thinks that key is not pressed.
S600, when the LCD initialization was complete, backlight was opened in control, otherwise closes LCD, enables described voltage comparator, makes portable terminal enter holding state.When key think be pressed after, after the LCD initialization was complete, backlight was opened in central processing unit control, and among the step S500, when key is considered to not press, then closes LCD, the enable voltage comparer, portable terminal reenters holding state.
The portable terminal that LCD responded fast when the present invention also provided a kind of standby, the principle of work of this portable terminal is based on the realization of said method preferred embodiment, and as shown in Figure 5, portable terminal comprises:
Central processing unit is electrically connected output enable or disable signal with described voltage comparator;
Central processing unit is electrically connected with described LCD and backlight, is used for controlling described LCD and backlight;
Voltage comparator be used for to receive the start threshold voltage that sets in advance and the magnitude of voltage of key input.
When detecting, voltage comparator wakes central processing unit when level that key connects central processing unit one end is lower than described start threshold voltage up, the complete sign of LCD initialization is set and starts LCD and carry out initialization, when judging that portable terminal is pressed, whether initialization is complete for inquiry LCD, backlight is opened in the complete rear control of affirmation LCD initialization, otherwise close LCD, enable described voltage comparator, make portable terminal enter holding state.
Wherein, as shown in Figure 7, central processing unit comprises key detecting unit 201, backlight control unit 202, LCD control module 203 and comparer control module 204; Whether key detecting unit 201 is pressed for detection of the mobile terminal-opening key; Backlight control unit 202, LCD control module 203 are controlled respectively backlight, LCD unlatching or are closed; Comparer control module 204 is used for receiving the start threshold voltage that sets in advance and the magnitude of voltage of key input compares.
Fig. 6 shows the circuit principle structure of portable terminal of the present invention, as shown in Figure 6, the K1 end of key 100 is connected to the ground and connects, the K2 end is connected with the PONKEY of central processing unit 200, the K2 end connects VDD by pull-up resistor R, when key was not pressed, central processing unit PONKEY detected high level; When key was pressed, central processing unit PONKEY detected low level.
The K2 of key 100 end also is connected with the IN1 end of voltage comparator 300, compares with Vth: when voltage comparator IN1 terminal voltage during more than or equal to the IN2 terminal voltage, and voltage comparator OUT end output high level; When voltage comparator IN1 terminal voltage during less than the IN2 terminal voltage, voltage comparator OUT holds output low level.Wherein, Vth is half of K2 end high level voltage.
The OUT end of the GPIO1 of central processing unit 200 and voltage comparator 300 is connected, and whether is lower than Vth for detection of the K2 terminal voltage of key; Whether the GPIO2 of central processing unit is connected with the EN of voltage comparator end, be used for the control voltage comparator and work, and for example controlling GPIO2 when central processing unit is then enable voltage comparer of high level; GPIO2 is then forbidden energy voltage comparator of low level when central processing unit control.
Particularly, the K1 of key 100 end is connected to the ground and connects, and the K2 end is connected with the PONKEY end of central processing unit 200, and the K2 end connects VDD by pull-up resistor R.Whether central processing unit 200 detects key 100 by key detecting unit 201 and be pressed: when key 100 was not pressed, the PONKEY of central processing unit 200 end detected high level; When key 100 is pressed, the PONKEY end of central processing unit 200 detects low level, the low level that detects continuous 100 milliseconds (this time is determined by the portable terminal manufacturer, is set in the present embodiment 100 milliseconds) when the PONKEY end thinks that then the user supresses key 100.
The K2 of key 100 end also is connected with the IN1 end of voltage comparator 300, compares with Vth: when the IN1 of voltage comparator 300 terminal voltage during more than or equal to the IN2 terminal voltage, and the OUT end output high level of voltage comparator 300; When the IN1 of voltage comparator 300 terminal voltage during less than the IN2 terminal voltage, the OUT of voltage comparator 300 end output low level.Wherein, Vth is half of K2 end high level voltage.
The OUT end of the GPIO1 of central processing unit 200 and voltage comparator 300 is connected, and whether is lower than Vth for detection of the K2 terminal voltage of key 100; Whether the GPIO2 of central processing unit 200 is connected with the EN end of voltage comparator 300, be used for control voltage comparator 300 and work, and for example controlling GPIO2 when central processing unit 200 is then enable voltage comparer 300 of high level; 200 control GPIO2 are then forbidden energy voltage comparator 300 of low level when central processing unit.When central processing unit 200 passes through comparer control module 204 enable voltage comparer 300, if detecting when the OUT end of voltage comparator 300 becomes low level by high level, the GPIO1 of central processing unit 200 will control LCD control module 203 initialization LCD.
Should be understood that; the above only is preferred embodiment of the present invention; be not sufficient to limit technical scheme of the present invention; for those of ordinary skills; within the spirit and principles in the present invention; can be increased and decreased according to the above description, replacement, conversion or improvement, and all these increases and decreases, replacement, conversion or improve after technical scheme, all should belong to the protection domain of claims of the present invention.
Claims (9)
1. the quick method of response of LCD during a standby starts LCD when being used for mobile terminal standby, it is characterized in that, comprises the steps:
Set in advance the start threshold voltage to voltage comparator;
After portable terminal enters standby, portable terminal central processing unit enable voltage comparer;
When detecting, described voltage comparator wakes central processing unit when level that key connects central processing unit one end is lower than described start threshold voltage up;
Central processing unit forbidden energy voltage comparator arranges the complete sign of LCD initialization, and startup LCD carries out initialization;
Judge whether the mobile terminal-opening key is pressed, whether initialization is complete for inquiry LCD when confirming that the mobile terminal-opening key is pressed;
When the LCD initialization was complete, backlight was opened in control, otherwise closes LCD, enables described voltage comparator, makes portable terminal enter holding state.
2. the quick method of response of LCD during standby according to claim 1 is characterized in that, setting in advance the start threshold voltage is that described key connects half of central processing unit one end high level voltage.
3. the quick method of response of LCD during standby according to claim 2 is characterized in that, described key is portable terminal can wake by this button portable terminal up under ideal case button.
4. the quick method of response of LCD during standby according to claim 1 is characterized in that, the described LCD of setting initialization is complete is masked as that initialization is complete to be set to 1, otherwise this zone bit is set to 0.
5. the quick method of response of LCD during standby according to claim 4, it is characterized in that, judge the mobile terminal-opening key concrete following steps that adopt that whether are pressed: after level that key connects central processing unit one end is lower than the described start threshold voltage schedule time, confirm that then the mobile terminal-opening key is pressed, otherwise judge that key is not pressed, enable described voltage comparator, make portable terminal enter holding state.
6. the quick method of response of LCD during standby according to claim 5 is characterized in that, the schedule time that the level that described key connects central processing unit one end is lower than described start threshold voltage is 100 milliseconds.
7. portable terminal, the method that the LCD when adopting such as the described standby of each claim of claim 1 to 6 responds fast is characterized in that this portable terminal comprises central processing unit, voltage comparator, backlight, LCD and key; Described central processing unit is electrically connected with key, voltage comparator, backlight and LCD;
One end of described key is electrically connected with described central processing unit, voltage comparator, and is electrically connected with Input voltage terminal by pull-up resistor, other end ground connection;
Described central processing unit is electrically connected output enable or disable signal with described voltage comparator;
Described central processing unit is electrically connected with described LCD and backlight, is used for controlling described LCD and backlight;
Described voltage comparator be used for to receive the start threshold voltage that sets in advance and the magnitude of voltage of described key input;
When detecting, voltage comparator wakes central processing unit when level that key connects central processing unit one end is lower than described start threshold voltage up, the complete sign of LCD initialization is set and starts LCD and carry out initialization, when judging that portable terminal is pressed, whether initialization is complete for inquiry LCD, backlight is opened in the complete rear control of affirmation LCD initialization, otherwise close LCD, enable described voltage comparator, make portable terminal enter holding state.
8. portable terminal according to claim 7 is characterized in that, described central processing unit comprises key detecting unit, backlight control unit, LCD control module and voltage comparator control module;
Whether described key detecting unit is pressed for detection of key;
Described backlight control unit is used for the unlatching of control backlight;
Described LCD control module is used for control LCD and carries out initialization;
The level that described voltage comparator control module is used for being connected an end with central processing unit according to key compares with default start threshold voltage, and feeds back signal to described central processing unit according to comparative structure and control LCD and carry out initialization.
9. portable terminal according to claim 7 is characterized in that, described start threshold voltage is that described key connects half of central processing unit one end high level voltage.
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| CN2013102327719A CN103366702A (en) | 2013-06-13 | 2013-06-13 | Quick response method for LCD in standby and mobile terminal |
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| CN2013102327719A CN103366702A (en) | 2013-06-13 | 2013-06-13 | Quick response method for LCD in standby and mobile terminal |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106325897A (en) * | 2015-06-19 | 2017-01-11 | 中兴通讯股份有限公司 | Quick startup method and device for mobile terminal |
| CN106485120A (en) * | 2016-09-22 | 2017-03-08 | 宇龙计算机通信科技(深圳)有限公司 | Light screen method, light screen apparatus and terminal |
| WO2017049956A1 (en) * | 2015-09-24 | 2017-03-30 | 深圳Tcl数字技术有限公司 | Standby and wake up method and apparatus for android device |
| CN108074581A (en) * | 2016-11-16 | 2018-05-25 | 深圳诺欧博智能科技有限公司 | For the control system of human-computer interaction intelligent terminal |
| CN109377950A (en) * | 2018-10-31 | 2019-02-22 | 惠科股份有限公司 | A kind of driving method and its display panel of display panel |
| CN110277069A (en) * | 2019-06-27 | 2019-09-24 | 青岛海信电器股份有限公司 | A kind of video screen method for controlling backlight thereof, device and TV |
| US11107423B2 (en) | 2019-06-27 | 2021-08-31 | Hisense Visual Technology Co., Ltd. | Method and device for controlling backlight, and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106325897A (en) * | 2015-06-19 | 2017-01-11 | 中兴通讯股份有限公司 | Quick startup method and device for mobile terminal |
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| CN110277069A (en) * | 2019-06-27 | 2019-09-24 | 青岛海信电器股份有限公司 | A kind of video screen method for controlling backlight thereof, device and TV |
| WO2020258711A1 (en) * | 2019-06-27 | 2020-12-30 | 海信视像科技股份有限公司 | Backlight control method and device, and display device |
| US11107423B2 (en) | 2019-06-27 | 2021-08-31 | Hisense Visual Technology Co., Ltd. | Method and device for controlling backlight, and display device |
| CN110277069B (en) * | 2019-06-27 | 2021-09-14 | 广东海信电子有限公司 | Television screen backlight control method and device and television |
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Application publication date: 20131023 |