CN105895039A - Electronic apparatus and method for driving display screen - Google Patents
Electronic apparatus and method for driving display screen Download PDFInfo
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- CN105895039A CN105895039A CN201610327965.0A CN201610327965A CN105895039A CN 105895039 A CN105895039 A CN 105895039A CN 201610327965 A CN201610327965 A CN 201610327965A CN 105895039 A CN105895039 A CN 105895039A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000011800 void material Substances 0.000 claims description 2
- 210000003205 muscle Anatomy 0.000 claims 1
- 239000004973 liquid crystal related substance Substances 0.000 description 11
- 239000003990 capacitor Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000005055 memory storage Effects 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3618—Control of matrices with row and column drivers with automatic refresh of the display panel using sense/write circuits
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention relates to an electronic apparatus and a method for driving a display screen. The method includes the following steps that: the first address and second address of a first memory which are repeatedly erasable and writable are read, so that a first Vcom value stored in the first address and a numerical value of the times of calibration stored in the second address can be obtained; whether the numerical value of the times of calibration is zero is judged, if the numerical value of the times of calibration is zero, the display screen is driven with a second Vcom value in a second memory in the driving chip of the display screen, the number of the times of the writing of the second memory being limited, the second Vcom value being a Vcom value which appears correspondingly when an initial display screen flash degree is minimum; and if the numerical value of the times of calibration is not zero, the display screen is driven with the first Vcom value, wherein the first Vcom value is a Vcom value which appears correspondingly when a display screen flash degree is minimum after N times of calibration, wherein N is the numerical value of the times of calibration. With the above method adopted, the flash of the display screen can be calibrated for an infinite number of times.
Description
Technical field
The present invention relates to field technical field of electronic equipment, particularly relate to a kind of electronic equipment and drive
The method of dynamic display screen.
Background technology
The most general liquid crystal indicator is by Source drive 1, gate driver 2, LCD 3
And Vcom voltage generation circuit 4 forms.LCD (liquid crystal display) panel 3 includes m × n picture
Element, owing to each pixel is made up of R, G, B, then each pixel should comprise 3 pixels
Unit 5, each pixel cell 5 comprises a TFT (thin film transistor (TFT)) and pixel capacitor.Pixel
Capacitor comprises show electrode and public electrode, and show electrode is connected with the source electrode of TFT, and owns
Public electrode links together, and is connected with Vcom voltage.Additionally the drain electrode of TFT drives with source
The signal Si of device output (i is 1,2 ..., n) it is connected, the signal Gj (j of grid and gate driver output
It is 1,2 ..., m) it is connected.
Make the liquid crystal molecule in liquid crystal panel deflect after pixel capacitor stored voltage, have light saturating
Cross liquid crystal molecule thus show GTG.It is special that liquid crystal molecule can destroy it after a direction deflection always
Property, can not deflect with the different GTG of display with the voltage on pixel capacitor by making it, it is therefore necessary to
Liquid crystal molecule is made to deflect towards different directions.When the show electrode voltage of pixel capacitor is higher than common electrical
Pole tension, liquid crystal molecule positive deflection, referred to as positive polarity, now the voltage of picture element signal Si is referred to as
Positive signal voltage；When the low public electrode voltages of show electrode voltage of pixel capacitance, liquid crystal divides
Son reversely deflection, referred to as negative polarity, now the voltage of picture element signal Si is referred to as minus polarity signal voltage.
For avoiding damage to the characteristic of liquid crystal molecule, the picture element signal Si on pixel capacitor is positive polarity and bears
The signal of alternating polarity.Realize positive polarity at present and minus polarity signal driving method alternately has many
Kind, but often cause the film flicker of liquid crystal panel.For avoiding flicker, it is necessary to regulation common electrical
The Vcom voltage of pole, dispatches from the factory for LCDs and will carry out flicker calibration, calibrate Vcom
Depositor, it is ensured that the Vcom voltage of each screen is optimum, flashes the slightest.
Presently mainly use OTP (One Time Programmable, one-off programming) school
Accurate Vcom burning is cured in LCDs.Adopt inside One Time Programmable, i.e. ROM
With fuse-wires structure, utilizing electric current to be blown, fuse opening just cannot recover again, and data cannot be again
It is altered.Current chip, majority can support 1-3 OTP Vcom depositor, namely
Say in the driving chip of the value of Vcom can solidify burning LCDs after calibrating, this time
Number at most can only 3 times, once beyond number of times, Vcom value cannot resolidification in LCDs.
But OTP vcom technology at least following three open defect: 1) burning number of times only has 3
Secondary, cause flicker to exceed standard if it exceeds number of times is not burnt to optimum, module is typically only capable to scrap.
2) LCDs producer usually has burning to flash the screen shipment exceeded standard to cellular telephone companies, mobile phone public affairs
Being found to have what a lot of flicker exceeded standard after department's installation, need to do over again, doing over again is accomplished by tearing machine open screen is pulled down
Doing over again OTP burning, this process causes wear and tear expense huge.3) flicker it is found to have after sale serious
Causing customer complaint, repair difficulty, OTP is typically only capable to do over again in module group display screen producer, and mobile phone is public
Department does not possess this equipment of doing over again.
Accordingly, it is desirable to provide a kind of electronic equipment and the method for driving display screen, to solve above-mentioned skill
Art problem.
Summary of the invention
The technical problem that present invention mainly solves is to provide a kind of electronic equipment and drives display screen
Method, it is possible to realize the flicker of unlimited number of calibration display screen.
For solving above-mentioned technical problem, the technical scheme that the present invention uses is: provide one to drive
The method of dynamic display screen, the method includes: read the first ground of repeatable erasable first memory
Location and the second address are to obtain respectively in the Vcom value and the second address stored in the first address
The calibration number of times numerical value of storage；Judge to calibrate whether number of times numerical value is zero, if zero with display screen
Driving chip in write the 2nd Vcom value in the limited second memory of number of times and drive and show
Screen；If not zero drives display screen with a Vcom value；Wherein, a Vcom value is warp
Vcom value corresponding during display screen flicker level minimum after n-th calibration, N is calibration number of times number
Value；The Vcom value that 2nd Vcom value is corresponding when being initial display screen flicker level minimum.
Wherein, wrap before reading the first address of repeatable erasable first memory and the second address
Include: confirm a Vcom value by debugging；Oneth Vcom value is stored in the of first memory
Add 1 in one address and by the calibration number of times numerical value of storage in the second address.
Wherein, confirm that a Vcom value includes by debugging: by display screen display flicker test
Figure, for increasing the first virtual key of Vcom value, virtual for reducing the second of Vcom value
Button and for writing the 3rd virtual key of Vcom value；Receive click on the first virtual key or
Second virtual key carrys out corresponding increase or reduces the touch of Vcom value, at flicker test figure
Flicker level minimum time click on the 3rd virtual key using by corresponding Vcom value as first
Vcom value write the first address.
Wherein, first memory is nand flash memory.
Wherein, second memory is OTP one-off programming memorizer.
For solving above-mentioned technical problem, another technical solution used in the present invention is: provide one
A kind of electronic equipment, this electronic equipment includes processor, display screen and repeatable erasable first
Memorizer, display screen includes that driving chip, driving chip include writing the second storage that number of times is limited
Device, processor is used for reading the first address of first memory and the second address to obtain first respectively
The calibration number of times numerical value of storage, processor in the Vcom value stored in address and the second address
Whether it is zero for judging calibration number of times numerical value, if zero with second in second memory
Vcom value drives display screen, if not zero with a Vcom value driving display screen, wherein,
The Vcom value that oneth Vcom value is corresponding when being display screen flicker level minimum after n-th is calibrated,
N is calibration number of times numerical value；Correspondence when 2nd Vcom value is initial display screen flicker level minimum
Vcom value.
Wherein, processor is for inciting somebody to action before the first address reading first memory and the second address
Oneth Vcom value is stored in the first address of first memory and by the calibration of storage in the second address
Number of times numerical value adds 1.
Wherein, processor is for being flashed test figure by display screen display, be used for increasing Vcom value
The first virtual key, for reducing the second virtual key of Vcom value and for writing Vcom
3rd virtual key of value；Processor is used for receiving click the first virtual key or the second virtual key
Increase or reduce the touch of Vcom value, and for receiving the flicker journey of flicker test figure
The 3rd virtual key is clicked on corresponding Vcom value to be write as a Vcom value when degree is minimum
The touch of the first address.
Wherein, first memory is nand flash memory.
Wherein, second memory is OTP one-off programming memorizer.
The invention has the beneficial effects as follows: be different from the situation of prior art, the present invention reads repeatable
First address and second address of erasable first memory store to obtain respectively in the first address
A Vcom value and the second address in storage calibration number of times numerical value；Judge calibration number of times numerical value
Whether it is zero, if zero to write the second memory that number of times is limited in the driving chip of display screen
In the 2nd Vcom value drive display screen；If not zero drives display screen with a Vcom value,
First memory is repeatable erasable memorizer, therefore can not limit number of times when debugging calibration
Write Vcom value, it is possible to realize the flicker of unlimited number of calibration display screen.
Accompanying drawing explanation
Fig. 1 is the flow chart that the present invention drives the method for display screen；
Fig. 2 is the module diagram of electronic equipment of the present invention.
Detailed description of the invention
The present invention will be described in detail with embodiment below in conjunction with the accompanying drawings.
Referring to Fig. 1, Fig. 1 is the flow chart that the present invention drives the method for display screen.In this enforcement
In, drive the method for display screen to comprise the following steps:
Step S11: read the first address of repeatable erasable first memory and the second address with
Obtain the calibration number of times of storage in the Vcom value and the second address stored in the first address respectively
Numerical value.
In step s 11, first memory is nand flash memory.In other embodiments
First memory can also be other repeatable erasable memorizer.Oneth Vcom value is through
Vcom value corresponding during display screen flicker level minimum after n times calibration, N is calibration number of times numerical value；
The Vcom value that 2nd Vcom value is corresponding when being initial display screen flicker level minimum.N is permissible
It is zero, if N is zero, illustrates first memory does not stores a Vcom value.
Step S12: judge to calibrate whether number of times numerical value is zero, if zero with the driving of display screen
The 2nd Vcom value write in chip in the second memory that number of times is limited drives display screen；If no
It is zero and drives display screen with a Vcom value.
In step s 12, second memory is OTP one-off programming memorizer.Second memory
Storage number of times less than or equal to 3.The ROM of One Time Programmable, i.e. driving chip is internal to be used
Fuse-wires structure, utilizes electric current to be blown, and fuse opening just cannot recover again, and data cannot be done again
Change.Current chip, majority can support 1-3 OTP Vcom depositor, say, that
In the driving chip of the value of Vcom can solidify burning LCDs after calibrating, this number of times
At most can only 3 times, once beyond number of times, Vcom value cannot resolidification in LCDs.
Oneth Vcom value and the 2nd Vcom value are this magnitude of voltage of offer to display screen when driving display screen
Common electrical pressure side.When calibrating number of times and being not zero, drive display screen, tool with a Vcom value
Body is for reading a Vcom value, by a Vcom value covering the after display screen normal initialization
2nd Vcom value of storage in two memorizeies.When calibrating number of times and being zero, with the 2nd Vcom value
Drive display screen, now need not read first memory, will be straight after display screen normal initialization
Connect and read the 2nd Vcom value of storage in driving chip.
Preferably, before reading the first address and second address of repeatable erasable first memory
Including: confirm a Vcom value by debugging；Oneth Vcom value is stored in first memory
Add 1 in first address and by the calibration number of times numerical value of storage in the second address.
Preferably, confirm that a Vcom value includes by debugging: surveyed by display screen display flicker
Attempt, for increasing the first virtual key of Vcom value, for reducing the second void of Vcom value
Intend button and for writing the 3rd virtual key of Vcom value；Receive and click on the first virtual key
Or second virtual key come corresponding increase or reduce Vcom value touch, flicker test
Click on during the flicker level minimum of figure the 3rd virtual key using by corresponding Vcom value as first
Vcom value write the first address.
Refer to the module diagram that Fig. 2, Fig. 2 are electronic equipments of the present invention.In the present embodiment
Electronic equipment includes: processor 10, display screen 11 and repeatable erasable first memory 12.
Display screen 11 includes that driving chip 111, driving chip 111 include writing that number of times is limited
Two memorizeies 1111, processor 10 is for reading the first address and second ground of first memory 12
Location is to obtain the calibration of storage in the Vcom value and the second address stored in the first address respectively
Number of times numerical value, processor 10 is used for judging calibrating whether number of times numerical value is zero, if zero with the
The 2nd Vcom value in two memorizeies 1111 drives display screen 11, if not zero with first
Vcom value drives display screen 11, and wherein, a Vcom value is display screen after n-th is calibrated
Vcom value corresponding during 11 flicker level minimum, N is calibration number of times numerical value；2nd Vcom value
For Vcom value corresponding during initial display screen 11 flicker level minimum.
Preferably, processor 10 is on the first address and the second ground reading first memory 11
A Vcom value is stored in the first address of first memory 11 and by the second address before location
The calibration number of times numerical value of storage adds 1.
Preferably, processor 10 is for being flashed test figure by display screen 12 display, be used for increasing
First virtual key of Vcom value, for reducing the second virtual key of Vcom value and being used for
3rd virtual key of write Vcom value；Processor 10 be used for receiving click the first virtual key or
Second virtual key increases or reduces the touch of Vcom value, and is used for receiving flicker survey
Click on during the flicker level minimum attempted the 3rd virtual key using by corresponding Vcom value as first
The touch of Vcom value write the first address.
Preferably, first memory 12 is nand flash memory.
Preferably, second memory 1111 is OTP one-off programming memorizer.
The present invention read the first address of repeatable erasable first memory and the second address with point
Do not obtain the calibration number of times number of storage in the Vcom value and the second address stored in the first address
Value；Judge to calibrate whether number of times numerical value is zero, if zero to write in the driving chip of display screen
The 2nd Vcom value in the second memory that number of times is limited drives display screen；If not zero with
One Vcom value drives display screen, and first memory is repeatable erasable memorizer, is therefore adjusting
The write Vcom value of number of times can not be limited, it is possible to realize unlimited number of calibration display screen during examination calibration
Flicker.
The foregoing is only embodiments of the present invention, not thereby limit the patent model of the present invention
Enclosing, every equivalent structure utilizing description of the invention and accompanying drawing content to be made or equivalence flow process become
Change, or be directly or indirectly used in other relevant technical fields, be the most in like manner included in the present invention's
In scope of patent protection.
Claims (10)
1. the method driving display screen, it is characterised in that described method includes:
Read the first address of repeatable erasable first memory and the second address to obtain respectively
The calibration number of times of storage in the Vcom value stored in described first address and described second address
Numerical value；
Judge whether described calibration number of times numerical value is zero, if zero with the driving core of described display screen
The 2nd Vcom value write in sheet in the second memory that number of times is limited drives described display screen；If
It is not zero and then drives described display screen with a described Vcom value；
Wherein, a described Vcom value is that described display screen flicker level is after n-th is calibrated
Hour corresponding Vcom value, N is described calibration number of times numerical value；Described 2nd Vcom value is just
Vcom value corresponding during the described display screen flicker level minimum begun.
Method the most according to claim 1, it is characterised in that the repeatable wiping of described reading
Include before first address of the first memory write and the second address:
A described Vcom value is confirmed by debugging；
A described Vcom value is stored in the first address of described first memory and by described
In double-address, the calibration number of times numerical value of storage adds 1.
Method the most according to claim 2, it is characterised in that described confirmed by debugging
A described Vcom value includes:
Virtual press by described display screen display flicker test figure, for increasing the first of Vcom value
Key, for reduce Vcom value the second virtual key and for write Vcom value the 3rd void
Intend button；
Receive click on described first virtual key or described second virtual key come corresponding increase or
Reduce the touch of Vcom value, click on institute when the flicker level minimum of described flicker test figure
State the 3rd virtual key so that corresponding Vcom value is write described the as a described Vcom value
One address.
4. according to the method described in claim 1-3 any one, it is characterised in that described first
Memorizer is nand flash memory.
5. according to the method described in claim 1-3 any one, it is characterised in that described second
Memorizer is OTP one-off programming memorizer.
6. an electronic equipment, it is characterised in that described electronic equipment includes processor, display
Screen and repeatable erasable first memory, described display screen includes driving chip, described driving
Chip includes writing the second memory that number of times is limited, and described processor is used for reading described first and deposits
First address of reservoir and the second address are to obtain first stored in described first address respectively
The calibration number of times numerical value of storage in Vcom value and described second address, described processor is used for judging
Whether described calibration number of times numerical value is zero, if zero with second in described second memory
Vcom value drives described display screen, if not zero drives described aobvious with a described Vcom value
Display screen, wherein, a described Vcom value is described display screen flicker level after n-th is calibrated
Vcom value corresponding time minimum, N is described calibration number of times numerical value；Described 2nd Vcom value is
Vcom value corresponding during initial described display screen flicker level minimum.
7. according to the electronic equipment described in right 6, it is characterised in that described processor is used for
Before reading the first address of described first memory and the second address, a described Vcom value is deposited
Enter in the first address of described first memory and by the calibration number of times of storage in described second address
Numerical value adds 1.
Electronic equipment the most according to claim 6, it is characterised in that described processor is used
In by described display screen display flicker test figure, for increase Vcom value the first virtual key,
For reducing the second virtual key of Vcom value and virtual pressing for writing the 3rd of Vcom value the
Key；
Described processor is used for receiving described first virtual key of click or described second virtual key
Increase or reduce the touch of Vcom value, and for receiving the sudden strain of a muscle of described flicker test figure
Click on during bright degree minimum described 3rd virtual key using by corresponding Vcom value as described first
Vcom value writes the touch of described first address.
9. according to the electronic equipment described in claim 6-8 any one, it is characterised in that described
First memory is nand flash memory.
10. according to the electronic equipment described in claim 6-8 any one, it is characterised in that institute
Stating second memory is OTP one-off programming memorizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610327965.0A CN105895039A (en) | 2016-05-17 | 2016-05-17 | Electronic apparatus and method for driving display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610327965.0A CN105895039A (en) | 2016-05-17 | 2016-05-17 | Electronic apparatus and method for driving display screen |
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| Publication Number | Publication Date |
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| CN105895039A true CN105895039A (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610327965.0A Pending CN105895039A (en) | 2016-05-17 | 2016-05-17 | Electronic apparatus and method for driving display screen |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020075272A1 (en) * | 2000-12-18 | 2002-06-20 | Hitachi, Ltd. | Display control device and mobile electronic apparatus |
| JP2002372958A (en) * | 2001-04-10 | 2002-12-26 | Hitachi Ltd | Display device and display drive device |
| CN1641728A (en) * | 2003-12-26 | 2005-07-20 | 卡西欧计算机株式会社 | Display drive device and display apparatus having same |
| CN101188082A (en) * | 2001-12-27 | 2008-05-28 | 株式会社瑞萨科技 | Portable display device and portable telephone device |
| CN104900202A (en) * | 2015-05-21 | 2015-09-09 | 青岛海信移动通信技术股份有限公司 | Liquid crystal screen display driving method and device |
-
2016
- 2016-05-17 CN CN201610327965.0A patent/CN105895039A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020075272A1 (en) * | 2000-12-18 | 2002-06-20 | Hitachi, Ltd. | Display control device and mobile electronic apparatus |
| JP2002372958A (en) * | 2001-04-10 | 2002-12-26 | Hitachi Ltd | Display device and display drive device |
| CN101188082A (en) * | 2001-12-27 | 2008-05-28 | 株式会社瑞萨科技 | Portable display device and portable telephone device |
| CN1641728A (en) * | 2003-12-26 | 2005-07-20 | 卡西欧计算机株式会社 | Display drive device and display apparatus having same |
| CN104900202A (en) * | 2015-05-21 | 2015-09-09 | 青岛海信移动通信技术股份有限公司 | Liquid crystal screen display driving method and device |
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