CN103354084A - LCD (Liquid Crystal Display) polarity-overturn control method and display terminal - Google Patents
LCD (Liquid Crystal Display) polarity-overturn control method and display terminal Download PDFInfo
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- CN103354084A CN103354084A CN201310291647XA CN201310291647A CN103354084A CN 103354084 A CN103354084 A CN 103354084A CN 201310291647X A CN201310291647X A CN 201310291647XA CN 201310291647 A CN201310291647 A CN 201310291647A CN 103354084 A CN103354084 A CN 103354084A
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Abstract
The invention relates to an LCD polarity-overturn control method and an LCD display terminal. The method comprises the steps that 1) setup codes of a display screen respectively corresponding to different polarity overturn modes, including a frame overturn mode, a row overturn mode, a column overturn mode and a point overturn mode, are written in a memory of the LCD display terminal; a terminal processor detects a polarity-overturn mode switching instruction, and reads the setup code of the display screen in the instructed polarity mode into an LCDC (Liquid Crystal Display Controller) register; and according to the setup code of the display screen, an LCDC sends resetting signals to an LCD driver, and implements initialization of the display screen in the instructed polarity overturn mode. When the current overturn mode of the display screen causes failure of the display screen, another liquid-crystal molecule overturn mode can be directly turned to, thereby avoiding heavy load caused by replacement of control software, improving user experience, and decreasing maintenance cost of a manufacturer.
Description
Technical field
The present invention relates to the driving of LCDs, relate in particular to a kind of polarity upset control method and display terminal of LCDs.
Background technology
Because the liquid crystal molecule of LCDs has a specific character, it is constant that it can not be fixed on some voltage always, otherwise of long duration, even voltage is cancelled, liquid crystal molecule also can can't rotate because of the variation of electric field because of the destruction of characteristic again, therefore just voltage must be restored to the original state at set intervals.Existing LCDs is in order to guarantee the activity of its liquid crystal molecule, in display frame, can remove the liquid crystal molecule that overturns with certain frequency, so just can not make the fixing some directions of deflection of liquid crystal molecule, cause losing activity, this just need to be divided into the demonstration voltage in the LCDs two kinds of polarity, one is positive polarity, and another is negative polarity.When the voltage of show electrode is higher than the common(public electrode) during electrode voltage, just be called positive polarity; When the voltage of show electrode is lower than the common electrode voltage, just be called negative polarity.No matter be positive polarity or negative polarity, the GTG of one group of same brightness all can be arranged, so when about the pressure reduction absolute value of layer glass be fixedly the time, the GTG that shows is living.But under the both of these case, turning to of liquid crystal molecule is but fully opposite, also just can avoid above-mentioned and turn to the characteristic destruction of causing when always being fixed on a direction when liquid crystal molecule.The same display screen generally can be supported very many upset modes, such as a upset, and row upset, row upset etc.Row upset wherein and row upset mode can be divided into again line upset according to its columns that overturns simultaneously and line number, two wires upset, three line upsets etc.Yet LCDs is under some inverted pattern, and there is unsettled phenomenon in the common reference voltage of display screen inside (being Vcom voltage), and display screen the display screen band can occur, the bad phenomenon such as striped in use for some time.The bad of this display screen need to go to solve by the upset mode of change display screen.
Traditional terminal manufacturer all is the ways that adopt the corresponding a kind of display screen setup code of a terminal project, and being setup code by display screen, the upset mode of liquid crystal molecule determined, be in the existing pattern, a kind of specific terminal device can only be supported a kind of upset mode of display screen.When if display screen causes occurring the demonstration problem owing to the upset mode of its support, need to again change the upset mode of display screen, namely recompilate the setup code of display screen to deal with problems.So, the manufacturer just need to carry out the software heavy industry to terminal device, causes the cycle of dealing with problems long, causes the offending after sale service of client to experience, and is great on the brand image impact, easily causes terminal manufacturer's loss.
Summary of the invention
In order to overcome the weak point of the prior art of above-mentioned indication, the invention provides a kind of polarity upset control method and display terminal of LCDs, to avoid when the upset mode of the current use of display screen causes display screen bad, need again replacing to control software and cause heavy industry.
The present invention is achieved by the following technical solutions:
A kind of polarity upset control method of LCDs is applied to the liquid crystal display terminal of active matrix drive, and its step comprises:
S1, write the display screen setup code of respectively corresponding each polarity upset pattern to the storer of liquid crystal display terminal, described polarity upset pattern comprises frame inverted pattern, row inverted pattern, row inverted pattern and some inverted pattern;
S2, terminal handler detect polarity upset pattern switching command, read the display screen setup code of specifying under the polarity upset pattern to the LCDC register from described storer;
S3, lcd controller are sent to lcd driver according to the display screen setup code with reset signal, carry out the display screen initialization of specifying under the polarity upset pattern.
Further, the polarity upset pattern switching command among the described step S2 be liquid crystal display terminal under normal mode of operation, the menu option on the user interface is selected and trigger; Perhaps have under the terminal engineering mode of access authority limitation, produce/that maintenance arranges menu option on the interface is selected and trigger.
Described display screen setup code comprises that polarity upset is controlled parameter carries out assignment, and the polarity upset pattern that this polarity upset control parameter is used for the switching display screen is frame inverted pattern, row inverted pattern, row inverted pattern and puts a kind of of inverted pattern.
Further, among the described step S3, lcd controller is sent to lcd driver according to the display screen setup code with reset signal, carries out the display screen initialization of specifying under the polarity upset pattern and comprises: lcd controller is revised polarity upset control parameter according to the display screen setup code; Lcd controller sends reset signal to the outage of lcd driver control LCDs and powers on; Lcd controller sends picture signal according to amended polarity upset control parameter and upset controls signal to lcd driver execution demonstration.
In the polarity upset control method of LCDs of the present invention, described LCDs is film transistor type or two-terminal diode-type LCDs.
The invention also discloses a kind of liquid crystal display terminal, have the LCDs of active matrix drive, comprising:
Storer is used for writing the respectively display screen setup code of each polarity upset pattern of correspondence, and described polarity upset pattern comprises frame inverted pattern, row inverted pattern, row inverted pattern and some inverted pattern;
Terminal handler for detection of polarity upset pattern switching command, reads the display screen setup code of specifying under the polarity upset pattern to the LCDC register from described storer;
Lcd controller is used for sending reset signal according to the display screen setup code, carries out the display screen initialization of specifying under the polarity upset pattern;
Lcd driver is used for receiving the signal of lcd controller and carries out demonstration.
Further, described terminal handler is under the liquid crystal display terminal normal mode of operation for detection of polarity upset pattern switching command, detects the selected and polarity upset pattern switching command that triggers of menu option on the user interface; Perhaps have under the terminal engineering mode of access authority limitation, detect production/maintenance the selected and polarity upset pattern switching command that triggers of menu option on the interface is set.
Described display screen setup code comprises that polarity upset is controlled parameter carries out assignment, and the polarity upset pattern that this polarity upset control parameter is used for the switching display screen is frame inverted pattern, row inverted pattern, row inverted pattern and puts a kind of of inverted pattern.
Further, described lcd controller comprises:
The parameter modification module is used for revising polarity upset control parameter according to the display screen setup code;
The control module that resets is used for sending reset signal to the outage of lcd driver control LCDs and powers on;
The parameter module that comes into force is used for sending picture signal and upset according to amended polarity upset control parameter and controls signal to lcd driver and carry out and show.
The described LCDs of liquid crystal display terminal of the present invention is film transistor type or two-terminal diode-type LCDs.
Compared with prior art, the present invention is by display screen setup codes compatible a plurality of in the display terminal system, make LCDs can support plurality of liquid crystals molecule upset mode, it is the various polarity inverted pattern, when the upset mode of the current use of display screen causes display screen bad, can directly call another kind of liquid crystal molecule upset mode, and avoid causing heavy industry because again changing control software.So, not only make in use independently debugging or can obtain during after-sales service the quick of display screen and effective maintenance effects of user, improve the user to experience; But also reduced manufacturer's the wasting of resources, reduce the after-sales service cost.
Description of drawings
Accompanying drawing 1 is the realization flow schematic diagram of polarity upset control method of LCDs of the smart mobile phone of an embodiment of the present invention;
Accompanying drawing 2 is the composition frame chart of the liquid crystal display terminal of an embodiment of the present invention.
Embodiment
For the ease of those skilled in the art's understanding, the invention will be further described below in conjunction with accompanying drawing.
A kind of polarity upset control method of LCDs is applied to the liquid crystal display terminal of active matrix drive, and described liquid crystal display terminal comprises the intelligent terminals such as mobile phone, panel computer, notebook computer, and its step comprises:
S1, write the display screen setup code of respectively corresponding each polarity upset pattern to the storer of liquid crystal display terminal, described polarity upset pattern comprises frame inverted pattern, row inverted pattern, row inverted pattern and some inverted pattern;
S2, terminal handler detect polarity upset pattern switching command, read the display screen setup code of specifying under the polarity upset pattern to the LCDC register from described storer;
S3, lcd controller are sent to lcd driver according to the display screen setup code with reset signal, carry out the display screen initialization of specifying under the polarity upset pattern.
In the polarity upset control method of LCDs of the present invention, described LCDs is film transistor type or two-terminal diode-type LCDs.
Difference according to type of drive can be divided three classes liquid crystal display: static drive, simple matrix drive and active matrix drive.Wherein active matric-type is realized the independence of each pixel is accurately controlled by the mode of active switch, can be divided into thin-film transistors type (Thin Film Transistor, be abbreviated as TFT) and two-terminal diode-type (Metal Insulator Metal, be abbreviated as MIN) dual mode, TFT has become its main flow now.In the polarity upset control method of LCDs of the present invention, described LCDs is film transistor type or two-terminal diode-type LCDs, preferably, is the TFT LCDs.
LCDC is the abbreviation of LCD Controller, i.e. LCD controller, and the LCDC register is the lcd controller register.For lcd controller, its effect the programmable register that provides by configuration is provided produces the data that necessary control signal and transmission of data signals can be presented on the LCD and be sent to the outside lcd driver from the data buffer of internal system, produce necessary LCD control signal, thereby control and finish demonstration and the upset of figure, stack, the graphical display function of the series of complexes such as convergent-divergent.Lcd driver then only is responsible for the view data that receives is shown at LCD, can not do any processing to image.
In step S1, described polarity upset pattern comprises frame inverted pattern (all adjacent points of whole frame have identical polarity), (polarity is identical in every row for the row inverted pattern, adjacent lines polarity is opposite), (polarity is identical in every row for the row inverted pattern, adjacent columns polarity is opposite) and some inverted pattern (every consecutive point polarity is opposite), also comprise with three formed pixels of point of RGB as the triangular turnover pattern of a base unit (each pixel shows with different polarity from adjacent pixel) and other polarity upset patterns that can be suitable for using.Different polarity upset patterns has different requirements for the public electrode voltages of display screen, and the mode that changes such as public electrode voltages can not be applicable to row inverted pattern and some inverted pattern.Particularly, described polarity upset pattern realizes by the panel polarity correlation parameter such as parameter of arranging is set, because the concrete methods of realizing of each polarity upset pattern has been prior art, no longer further gives unnecessary details for its specific implementation program and principle at this.Existing display screen drive IC (described drive IC comprises lcd controller and lcd driver) is for the liquid crystal inverted pattern, this drive IC internal distribution has corresponding register so that the liquid crystal inverted pattern is controlled, traditional method can only be carried out single operation to this register, the single parameter value that namely can only configure this register is come the initialization display screen, in case set when the parameter value of this control liquid crystal inverted pattern then can't again change.
And in the present invention, in the storage redirected (being the LCDC register) for the distribution of liquid crystal inverted pattern, the display screen polarity upset pattern that different parameters is corresponding different.By increasing the software interface switch, make this switch as the condition that triggers change LCDC register parameters, realize compatible two or more simultaneously polarity upset patterns.Utilize the present invention, the developer can by the data in the software modification LCDC register, change the upset mode of liquid crystal molecule.When the parameter in drive IC detects its register is reformed, the upset mode of meeting control break liquid crystal molecule.
The setup code of display screen described in the step S1 comprises that polarity upset is controlled parameter carries out assignment, the polarity upset pattern that this polarity upset control parameter is used for the switching display screen is a kind of of frame inverted pattern, row inverted pattern, row inverted pattern and some inverted pattern, and namely the different assignment of described polarity upset control parameter represent each different polarity upset pattern.Particularly; pre-set the mapping value of the corresponding polarity upset control parameter of each polarity upset pattern; such as; pre-set when polarity upset control parameter assignment is 1; representing the polarity upset pattern is the frame inverted pattern; 2 representative row inverted pattern; 3 represent the row inverted pattern; 4 representative point inverted pattern; above-mentioned for example only as one of them embodiment of the present invention; the replacement of other embodiments under this design also should be included in protection scope of the present invention, does not list one by one other embodiments at this.
In step S2, described polarity upset pattern switching command can be that liquid crystal display terminal is under normal mode of operation, menu option on the user interface is selected and trigger, be that the user can be switched by independently carry out the polarity upset pattern on user interface, and select required polarity upset pattern; Or have under the terminal engineering mode of access authority limitation, produce/that maintenance arranges menu option on the interface is selected and trigger, after namely can only entering the terminal engineering mode by the grantee, carry out the blocked operation of polarity upset pattern, when generally only producing or keeping in repair for the manufacturer.
In step S3, described lcd controller is sent to lcd driver according to the display screen setup code with reset signal, carries out the display screen initialization of specifying under the polarity upset pattern and comprises: 1) lcd controller is revised polarity upset control parameter according to the display screen setup code in the LCDC register; 2) lcd controller sends reset signal to the outage of lcd driver control LCDs and powers on; 3) lcd controller controls signal to lcd driver execution demonstration according to amended polarity upset control parameter transmission picture signal and upset.
Particularly, as shown in Figure 1, take smart mobile phone as example, the present invention also provides the realization flow of polarity upset control method of LCDs of the smart mobile phone of a kind of embodiment, and its step comprises:
S101, write the respectively display screen setup code of corresponding each polarity upset pattern to terminal memory;
S102, user carry out LCDs in user interface and switch to the operation of specifying the polarity upset pattern;
S103, CPU(are terminal handler) detect LCD polarity upset pattern switching command;
S104, CPU read the display screen setup code of specifying under the polarity upset pattern to the LCDC register from terminal memory;
S105, lcd controller receive the display screen initialization command;
S106, lcd controller are revised the display screen parameter, comprise polarity upset control parameter;
S107, lcd controller send reset signal to lcd driver;
S108, LCDs outage reach and power on;
S109, lcd controller control signal to lcd driver according to amended polarity upset control parameter transmission picture signal and upset;
S110, lcd driver show according to the image of the signal controlling LCDs that receives;
S111, LCDs initialization are complete, and the polarity upset pattern is switched and finished.
The invention also discloses a kind of liquid crystal display terminal, have the LCDs 25 of active matrix drive, as shown in Figure 2, comprising:
Terminal handler 22 for detection of polarity upset pattern switching command, reads the display screen setup code of specifying under the polarity upset pattern to LCDC register 26 from described storer;
Further, described terminal handler is under the liquid crystal display terminal normal mode of operation for detection of polarity upset pattern switching command, detects the selected and polarity upset pattern switching command that triggers of menu option on the user interface; Perhaps have under the terminal engineering mode of access authority limitation, detect production/maintenance the selected and polarity upset pattern switching command that triggers of menu option on the interface is set.
Described display screen setup code comprises that polarity upset is controlled parameter carries out assignment, and the polarity upset pattern that this polarity upset control parameter is used for the switching display screen is frame inverted pattern, row inverted pattern, row inverted pattern and puts a kind of of inverted pattern.
Further, described lcd controller comprises:
The control module 27 that resets is used for sending reset signal to the outage of lcd driver control LCDs and powers on;
The parameter module 28 that comes into force is used for sending picture signal and upset according to amended polarity upset control parameter and controls signal to lcd driver and carry out and show.
The described LCDs of liquid crystal display terminal of the present invention is film transistor type or two-terminal diode-type LCDs.
Above content is in conjunction with concrete optimal way further description made for the present invention, should not assert that implementation of the present invention is confined to above explanation.For those skilled in the art, without departing from the inventive concept of the premise, can also make some simple deduction or replace, within the protection domain that the claim that all should be considered as being submitted to by the present invention is determined.
Claims (10)
1. the polarity upset control method of a LCDs is applied to the liquid crystal display terminal of active matrix drive, and its step comprises:
S1, write the display screen setup code of respectively corresponding each polarity upset pattern to the storer of liquid crystal display terminal, described polarity upset pattern comprises frame inverted pattern, row inverted pattern, row inverted pattern and some inverted pattern;
S2, terminal handler detect polarity upset pattern switching command, read the display screen setup code of specifying under the polarity upset pattern to the LCDC register from described storer;
S3, lcd controller are sent to lcd driver according to the display screen setup code with reset signal, carry out the display screen initialization of specifying under the polarity upset pattern.
2. the polarity upset control method of LCDs according to claim 1, it is characterized in that: the polarity upset pattern switching command among the described step S2 be liquid crystal display terminal under normal mode of operation, the menu option on the user interface is selected and trigger; Perhaps have under the terminal engineering mode of access authority limitation, produce/that maintenance arranges menu option on the interface is selected and trigger.
3. the polarity upset control method of LCDs according to claim 1, it is characterized in that: described display screen setup code comprises that polarity upset is controlled parameter carries out assignment, and the polarity upset pattern that this polarity upset control parameter is used for the switching display screen is frame inverted pattern, row inverted pattern, row inverted pattern and puts a kind of of inverted pattern.
4. the polarity upset control method of LCDs according to claim 3, it is characterized in that, among the described step S3, lcd controller is sent to lcd driver according to the display screen setup code with reset signal, carries out the display screen initialization of specifying under the polarity upset pattern and comprises:
Lcd controller is revised polarity upset control parameter according to the display screen setup code;
Lcd controller sends reset signal to the outage of lcd driver control LCDs and powers on;
Lcd controller sends picture signal according to amended polarity upset control parameter and upset controls signal to lcd driver execution demonstration.
5. the polarity upset control method of each described LCDs according to claim 1～4 is characterized in that: described LCDs is film transistor type or two-terminal diode-type LCDs.
6. liquid crystal display terminal has the LCDs of active matrix drive, it is characterized in that, comprising:
Storer is used for writing the respectively display screen setup code of each polarity upset pattern of correspondence, and described polarity upset pattern comprises frame inverted pattern, row inverted pattern, row inverted pattern and some inverted pattern;
Terminal handler for detection of polarity upset pattern switching command, reads the display screen setup code of specifying under the polarity upset pattern to the LCDC register from described storer;
Lcd controller is used for sending reset signal according to the display screen setup code, carries out the display screen initialization of specifying under the polarity upset pattern;
Lcd driver is used for receiving the signal of lcd controller and carries out demonstration.
7. liquid crystal display terminal according to claim 6, it is characterized in that: described terminal handler is under the liquid crystal display terminal normal mode of operation for detection of polarity upset pattern switching command, detects the selected and polarity upset pattern switching command that triggers of menu option on the user interface; Perhaps have under the terminal engineering mode of access authority limitation, detect production/maintenance the selected and polarity upset pattern switching command that triggers of menu option on the interface is set.
8. liquid crystal display terminal according to claim 6, it is characterized in that: described display screen setup code comprises that polarity upset is controlled parameter carries out assignment, and the polarity upset pattern that this polarity upset control parameter is used for the switching display screen is frame inverted pattern, row inverted pattern, row inverted pattern and puts a kind of of inverted pattern.
9. liquid crystal display terminal according to claim 8 is characterized in that, described lcd controller comprises:
The parameter modification module is used for revising polarity upset control parameter according to the display screen setup code;
The control module that resets is used for sending reset signal to the outage of lcd driver control LCDs and powers on;
The parameter module that comes into force is used for sending picture signal and upset according to amended polarity upset control parameter and controls signal to lcd driver and carry out and show.
10. each described liquid crystal display terminal according to claim 6～9 is characterized in that: described LCDs is film transistor type or two-terminal diode-type LCDs.
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| CN201310291647.XA CN103354084B (en) | 2013-07-12 | 2013-07-12 | A kind of polarity upset control method of LCDs and display terminal |
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| CN201310291647.XA CN103354084B (en) | 2013-07-12 | 2013-07-12 | A kind of polarity upset control method of LCDs and display terminal |
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| CN105261344A (en) * | 2015-11-25 | 2016-01-20 | 深圳市华星光电技术有限公司 | Control device and control method for display panel |
| CN109815041A (en) * | 2019-01-14 | 2019-05-28 | Oppo广东移动通信有限公司 | Display panel control method and Related product |
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| CN103354084B (en) | 2015-08-05 |
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Address after: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Patentee after: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS Corp.,Ltd. Address before: Changan Town, Guangdong province 523860 usha Beach Road Dongguan City, No. 18 Guangdong Oupo Mobile Communication Co Ltd Patentee before: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS Corp.,Ltd. |
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Granted publication date: 20150805 |