CN105070264B - A kind of common electric voltage adjustment system and method for liquid crystal display panel - Google Patents
A kind of common electric voltage adjustment system and method for liquid crystal display panel Download PDFInfo
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- CN105070264B CN105070264B CN201510562774.8A CN201510562774A CN105070264B CN 105070264 B CN105070264 B CN 105070264B CN 201510562774 A CN201510562774 A CN 201510562774A CN 105070264 B CN105070264 B CN 105070264B
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Abstract
System and method is adjusted the invention discloses a kind of common electric voltage of liquid crystal display panel.Wherein, the system includes arrangement for detecting, the flicker value for obtaining the liquid crystal display panel；Microcontroller, is connected with the arrangement for detecting, for obtaining the common electric voltage value exported to the liquid crystal display panel, and corresponding common electric voltage value when obtaining the flicker value minimum of the liquid crystal display panel according to the flicker value of the liquid crystal display panel；Common electric voltage output device, is connected with the microcontroller, for according to the common electric voltage value to liquid crystal display panel outputting common voltage.The common electric voltage adjustment system and method for this liquid crystal display panel, by arrangement for detecting, microcontroller and common electric voltage output device Auto-Sensing flicker value, adjust and obtain optimal common electric voltage, overcome and manually adjust common electric voltage and cause the not high defect of the confidence level and precision of common electric voltage, the production cost of system is reduced, liquid crystal display panel low production efficiency is improved.
Description
Technical field
The present invention relates to the common electric voltage adjustment system of technical field of liquid crystal display, more particularly to a kind of liquid crystal display panel
And method.
Background technology
When manufacturing liquid crystal display panel, to obtain the optimum voltage value of driving liquid crystal display panel, ceramic screw is typically used
Knife rotates on the special adjusting knob of common electric voltage, the flicker in picture center is reached minimum.Fig. 1 is liquid crystal display in the prior art
The electrical block diagram of the common electric voltage adjustment of panel, as shown in figure 1, slide rheostat R is connected to power end VDD and ground connection
Between end, the voltage between slide rheostat slide plate and earth terminal is common electric voltage output end Vcom, and variable resistance is slided by adjusting
Device R slide plate, changes common electric voltage output end Vcom value.Common electric voltage is drawn by eye-observation in above-mentioned manual adjusting style
The flicker level in face determines that human eye observation causes optimal common electric voltage to vary with each individual, causes the confidence level and precision of common electric voltage
It is not high, common electric voltage labor intensity is manually adjusted during mass production greatly, liquid crystal display panel low production efficiency.
At present, made in the common electric voltage of LCD panel debugging of small size using PC (Personal Computer) machine
The controller adjusted for common electric voltage, this control system includes upper computer module, slave computer module, host computer and slave computer and connected
Socket part point, software section includes the parts such as host computer interface exploitation and communication protocol, and system development costs are very high, and inapplicable
In the common electric voltage adjustment of the liquid crystal display panel of all dimensions.
The content of the invention
System and method is adjusted the invention provides a kind of common electric voltage of liquid crystal display panel, overcomes and leads in the prior art
Crossing human eye adjustment common electric voltage causes the not high defect of the confidence level and precision of common electric voltage, reduces the production cost of system.
In a first aspect, adjusting system, the system the embodiments of the invention provide a kind of common electric voltage of liquid crystal display panel
System includes：
Arrangement for detecting, the flicker value for obtaining the liquid crystal display panel；
Microcontroller, is connected with the arrangement for detecting, for according to the flicker value of the liquid crystal display panel obtain to
The common electric voltage value of the liquid crystal display panel output, and obtain corresponding during the flicker value minimum of the liquid crystal display panel
Common electric voltage value；
Common electric voltage output device, is connected with the microcontroller, for according to the common electric voltage value to liquid crystal
Show panel outputting common voltage.
Further, the microcontroller includes：
The liquid crystal of numerical value comparing unit, the flicker value current for comparing the liquid crystal display panel, and record
The last flicker value of display panel, the current flicker value of the liquid crystal display panel is with being currently applied to the LCD
The common electric voltage of plate is corresponding, and the last flicker value of the liquid crystal display panel is applied to the LCD with the last time
The common electric voltage of plate is corresponding；
Control chip, for the comparative result according to the numerical value comparing unit, increase is applied to the LCD
The common electric voltage of plate or reduction are applied to the common electric voltage of the liquid crystal display panel, until the flicker of the liquid crystal display panel
When value is minimum, corresponding common electric voltage value is obtained.
Further, the control chip is used for：
It is applied to the default common electric voltage value of the liquid crystal display panel；
It is applied to the liquid crystal display panel magnitude of voltage smaller than default common electric voltage；
If current flicker value is less than previous flicker value, reduce the common electric voltage for being applied to the liquid crystal display panel, according to
The flicker value of arrangement for detecting detecting, updates current flicker value and previous flicker value, by that analogy, before current flicker value is more than
One flicker value, the corresponding common electric voltage of previous flicker value is optimal common electric voltage；
If current flicker value is more than previous flicker value, increase is applied to the default common electric voltage of the liquid crystal display panel,
The flicker value detected according to arrangement for detecting, updates current flicker value and previous flicker value, if current flicker value is less than previous dodge
Bright value, increase is applied to the common electric voltage of the liquid crystal display panel, by that analogy, the current flicker detected until arrangement for detecting
Value is more than previous flicker value, and the corresponding common electric voltage of previous flicker value is optimal common electric voltage.
Further, the flicker value for the liquid crystal display panel that the arrangement for detecting is obtained is decimal data, described miniature
Controller also includes：
System converter, is connected with the arrangement for detecting and the numerical value comparing unit respectively, for by metric institute
State flicker value and be converted to binary flicker value.
Further, the numerical value comparing unit includes N number of digital comparator, and each digital comparator is used to compare
The binary number of two one, the digit for the binary data that wherein N is changed by the flicker value is determined.
Second aspect, the embodiment of the present invention additionally provides a kind of method for adjusting common voltage of liquid crystal display module panel,
Including：
Arrangement for detecting obtains the flicker value of the liquid crystal display panel；
Microcontroller obtains the common electrical exported to the liquid crystal display panel according to the flicker value of the arrangement for detecting
Pressure value, and corresponding common electric voltage value when obtaining the flicker value minimum of the liquid crystal display panel；
The common electric voltage value that common electric voltage output device is determined according to the microcontroller is to liquid crystal display panel
Outputting common voltage.
Further, the microcontroller include numerical value comparing unit and control chip, the microcontroller according to
The flicker value of arrangement for detecting obtains the common electric voltage value exported to the liquid crystal display panel, and obtains the LCD
Corresponding common electric voltage value includes when the flicker value of plate is minimum：
The current flicker value of the numerical value comparing unit liquid crystal display panel, and the LCD recorded
The last flicker value of plate, the current flicker value of the liquid crystal display panel and the public affairs for being currently applied to the liquid crystal display panel
Common voltage is corresponding, the last flicker value of the liquid crystal display panel and the last public affairs for being applied to the liquid crystal display panel
Common voltage is corresponding；
Control chip increases the public affairs for being applied to the liquid crystal display panel according to the comparative result of the numerical value comparing unit
Common voltage or reduction are applied to the common electric voltage of the liquid crystal display panel, until the flicker value of the liquid crystal display panel is minimum
When, obtain corresponding common electric voltage value.
Further, the control chip increases according to the comparative result of the numerical value comparing unit and is applied to the liquid
The common electric voltage of LCD panel or reduction are applied to the common electric voltage of the liquid crystal display panel, until the LCD
When the flicker value of plate is minimum, obtaining corresponding common electric voltage value includes：
It is applied to the default common electric voltage value of the liquid crystal display panel；
It is applied to the liquid crystal display panel magnitude of voltage smaller than default common electric voltage；
If current flicker value is less than previous flicker value, reduce the common electric voltage for being applied to the liquid crystal display panel, according to
The flicker value of arrangement for detecting detecting, updates current flicker value and previous flicker value, by that analogy, before current flicker value is more than
One flicker value, the corresponding common electric voltage of previous flicker value is optimal common electric voltage；
If current flicker value is more than previous flicker value, increase is applied to the default common electric voltage of the liquid crystal display panel,
The flicker value detected according to arrangement for detecting, updates current flicker value and previous flicker value, if current flicker value is less than previous dodge
Bright value, increase is applied to the common electric voltage of the liquid crystal display panel, by that analogy, the current flicker detected until arrangement for detecting
Value is more than previous flicker value, and the corresponding common electric voltage of previous flicker value is optimal common electric voltage.
Further, the flicker value for the liquid crystal display panel that the arrangement for detecting is obtained is decimal data, described miniature
Controller also includes system converter, and the system converter connects with the arrangement for detecting and the numerical value comparing unit respectively
Connect；Methods described also includes：
The metric flicker value is converted to binary flicker value by the system converter.
Further, the numerical value comparing unit includes N number of digital comparator, and each digital comparator is used to compare
The binary number of two one, the digit for the binary data that wherein N is changed by the flicker value is determined.
The technical scheme that the present invention is provided, on the one hand passes through arrangement for detecting, microcontroller and common electric voltage output device
The common electric voltage adjustment system of liquid crystal display panel is constituted, the system performs method of adjustment, realizes the public affairs of liquid crystal display panel
The adjust automatically of common voltage, overcomes common electric voltage confidence level and essence caused by the common electric voltage for manually adjusting liquid crystal display panel
The not high defect of degree, while by using microcontroller, reducing the cost of system development, reduces the work of staff
Intensity, improves the production efficiency of liquid crystal display panel.
Brief description of the drawings
Fig. 1 is the electrical block diagram of the common electric voltage adjustment of liquid crystal display panel in the prior art；
Fig. 2 is that a kind of common electric voltage for liquid crystal display panel that the embodiment of the present invention one is provided adjusts the structural representation of system
Figure；
Fig. 3 is that a kind of common electric voltage for liquid crystal display panel that the embodiment of the present invention two is provided adjusts the structural representation of system
Figure；
Fig. 4 is the structural representation of the logic circuit for the digital comparator that the embodiment of the present invention two is provided；
Fig. 5 is a kind of flow signal of the method for adjusting common voltage for liquid crystal display panel that the embodiment of the present invention three is provided
Figure；
Fig. 6 is a kind of flow signal of the method for adjusting common voltage for liquid crystal display panel that the embodiment of the present invention four is provided
Figure.
Embodiment
Further to illustrate the present invention, to reach the technological means and effect that predetermined goal of the invention is taken, tie below
Accompanying drawing and preferred embodiment are closed, system and method is adjusted to the common electric voltage according to a kind of liquid crystal display panel proposed by the present invention
Embodiment, structure, feature and its effect, describe in detail as after.
Embodiment one
Fig. 2 is that a kind of common electric voltage for liquid crystal display panel that the embodiment of the present invention one is provided adjusts the structural representation of system
Figure.The system is used for the common electric voltage of adjust automatically liquid crystal display panel, and referring to Fig. 2, the system is specifically included：
Arrangement for detecting 11, the flicker value for obtaining liquid crystal display panel 10；
Microcontroller 12, is connected with arrangement for detecting 11, for being obtained according to the flicker value of liquid crystal display panel 10 to liquid
The common electric voltage value that LCD panel 10 is exported, and corresponding common electrical when obtaining the flicker value minimum of liquid crystal display panel 10
Pressure value；
Common electric voltage output device 13, is connected with microcontroller 12, for according to 1 common electric voltage value to LCD
The outputting common voltage of plate 10.
Wherein, microcontroller 12 and common electric voltage output device 13 are integrated on a printed circuit, and arrangement for detecting 11 is only
Stand on outside printed circuit board (PCB).When arrangement for detecting 11 detects the flicker value of liquid crystal display panel 10, arrangement for detecting 11 passes through print
Arrangement for detecting interface on printed circuit board is connected with microcontroller 12；When need not detect the flicker value of liquid crystal display panel 10 or
When the common electric voltage adjustment of liquid crystal display panel 10 is finished, arrangement for detecting 11 is broken with the arrangement for detecting interface on printed circuit board (PCB)
Open.Therefore, the common electric voltage adjustment system of multiple liquid crystal display panels 10 can share an arrangement for detecting 11.Arrangement for detecting 11
Can be optic probe or image collecting device.The flicker value can be that arrangement for detecting is directly exported or many
Two field picture is by processing output.Exemplary, when arrangement for detecting 11 is image collecting device, the flicker value is the figure
As the previous collection moment of harvester and the two field picture at latter collection moment are compared what processing was obtained.
Common electric voltage of LCD panel adjusts System Working Principle：Arrangement for detecting 11 passes through printing with microcontroller 12
Arrangement for detecting interface on circuit board is attached, and arrangement for detecting 11 gathers the flicker value of liquid crystal display panel 10, miniature control
Device 12 periodically obtains the flicker value, and microcontroller 12 compares the current value and previous numerical value of the flicker value, adjustment
Common electric voltage is output to liquid by corresponding outputting common voltage, common electric voltage output device 13 according to above-mentioned outputting common voltage
The drive module of LCD panel 10.Arrangement for detecting 11 continues to detect the flicker value of liquid crystal display panel 10, microcontroller 12
According to current flicker value and the output valve of previous flicker value adjust automatically common electric voltage, common electric voltage output device 13 is according to above-mentioned
The output valve of common electric voltage, until corresponding common electric voltage value, i.e. liquid crystal when the flicker value for obtaining liquid crystal display panel 10 is minimum
The optimal common electric voltage value of display panel 10, now, microcontroller 12 is output to liquid crystal after common electric voltage is fixed
Show panel 10, so far obtain the optimal common electric voltage value of liquid crystal display panel 10.
The technical scheme that the present embodiment is provided, is made up of arrangement for detecting, microcontroller and common electric voltage output device
System, adjust automatically simultaneously exports optimal common electric voltage, it is to avoid human hand adjustment VR knobs simultaneously pass through human eye observation's LCD
Common electric voltage defect with a low credibility and low precision, reduces the miniature control used in labor intensity, system caused by plate
Device processed reduces the cost of system development, improves the production efficiency of liquid crystal display panel.
Embodiment two
On the basis of embodiment one, the common electric voltage adjustment system of the liquid crystal display panel, as shown in figure 3, miniature
Controller 12 includes：
The liquid of numerical value comparing unit 121, the flicker value current for comparing the liquid crystal display panel, and record
The last flicker value of LCD panel, the current flicker value of the liquid crystal display panel is with being currently applied to the liquid crystal display
The common electric voltage of panel is corresponding, and the last flicker value of the liquid crystal display panel is applied to the liquid crystal display with the last time
The common electric voltage of panel is corresponding；
Control chip 122, for the comparative result according to numerical value comparing unit 121, increase is applied to the liquid crystal display
The common electric voltage of panel or reduction are applied to the common electric voltage of the liquid crystal display panel, until the sudden strain of a muscle of the liquid crystal display panel
During bright value minimum, corresponding common electric voltage value is obtained.
In the embodiment of the present invention, control chip 122 in microcontroller 12 specifically for：It is applied to the liquid crystal display
The default common electric voltage value of panel；It is applied to the liquid crystal display panel magnitude of voltage smaller than default common electric voltage；
If current flicker value is less than previous flicker value, reduce the common electric voltage for being applied to the liquid crystal display panel, according to
The flicker value of arrangement for detecting detecting, updates current flicker value and previous flicker value, by that analogy, before current flicker value is more than
One flicker value, the corresponding common electric voltage of previous flicker value is optimal common electric voltage；
If current flicker value is more than previous flicker value, increase is applied to the default common electric voltage of the liquid crystal display panel,
The flicker value detected according to arrangement for detecting, updates current flicker value and previous flicker value, if current flicker value is less than previous dodge
Bright value, increase is applied to the common electric voltage of the liquid crystal display panel, by that analogy, the current flicker detected until arrangement for detecting
Value is more than previous flicker value, and the corresponding common electric voltage of previous flicker value is optimal common electric voltage.
Further, the flicker value for the liquid crystal display panel 10 that arrangement for detecting 11 is obtained is decimal data, miniature control
Device 12 also includes：System converter 123, is connected with arrangement for detecting 11 and numerical value comparing unit 121 respectively, for will be metric
The flicker value is converted to binary flicker value.
System converter 123 by flicker value after decimal format is converted to binary format, the sudden strain of a muscle of binary format
Bright value is sent to numerical value comparing unit 121.
It is preferred that, numerical value comparing unit 121 includes N number of digital comparator, and each digital comparator is used to compare two
The digit for the binary data that the binary number of individual one, wherein N are changed by the flicker value is determined.It is exemplary, enter when two
When the flicker value of form processed is 8, the numerical value comparing unit can include 8 digital comparators.
Digital comparator is that the binary number A and B of two one are compared, to judge the logic circuit of its size,
Comparative result has A>B、A<Tri- kinds of situations of B and A=B.One digit number value comparator is the basis of multidigit comparator circuit design.When
When A and B are a bit, they can only take 0 or 1 two kind of value, can draw the logical expression of 1 bit value comparator：
The logic circuit of the digital comparator is as shown in Figure 4.According to the principle of above-mentioned one digit number value comparator, Ke Yishe
Count out double figures value comparator and multidigit digital comparator.The technical scheme that the present embodiment is provided, inside microcontroller
Numerical value comparing unit, the common electric voltage of control chip and system converter adjust automatically liquid crystal display panel, it is to avoid pass through people
Work manual mode adjusts and visually determined the common electric voltage of liquid crystal display panel, improve outputting common voltage confidence level and
Precision, further increases the production efficiency of liquid crystal display panel.The microcontroller wherein used possesses single-chip microcomputer
Some functions of (Microcontroller Unit), but it is simpler than single chip computer architecture, and function is more single-minded.
Embodiment three
Fig. 5 is a kind of flow signal of the method for adjusting common voltage for liquid crystal display panel that the embodiment of the present invention three is provided
Figure.Methods described is applied in the common electric voltage adjustment system of the liquid crystal display panel described in embodiment one, methods described tool
Body comprises the following steps：
Step S310, arrangement for detecting obtain the flicker value of the liquid crystal display panel；
Step S320, microcontroller are obtained according to the flicker value of the arrangement for detecting and exported to the liquid crystal display panel
Common electric voltage value, and obtain the liquid crystal display panel flicker value it is minimum when corresponding common electric voltage value；
The common electric voltage value that step S330, common electric voltage output device are determined according to the microcontroller is to liquid crystal
Display panel outputting common voltage.
Corresponding common electric voltage value is liquid crystal when the flicker value of liquid crystal display panel described in above-mentioned steps S320 is minimum
The optimal common electric voltage of display panel.Microcontroller timing or the liquid crystal display panel for periodically reading arrangement for detecting measurement
Current flicker value, and the current flicker value and previous flicker value are compared, according to comparative result, to LCD
Plate exports the current flicker value or the corresponding common electric voltage value of previous flicker value, and arrangement for detecting continues to measure LCD
The flicker value of plate, updates current flicker value and previous flicker value in microcontroller, continues to compare above-mentioned two flicker value, and
Export corresponding common electric voltage.When arrangement for detecting detects the minimum flicker value of liquid crystal display panel, microcontroller stops
Common electric voltage value is adjusted, common electric voltage value is fixed and optimal common electric voltage is exported to liquid crystal display panel.Above-mentioned common electrical
Pressure is adjusted by microcontroller, and the magnitude of voltage that common electric voltage is adjusted every time is the integral multiple of minimum scale so that
Common electric voltage can reach high-precision regulation.
Further, the flicker value for the liquid crystal display panel that the arrangement for detecting is obtained is decimal data, described miniature
Controller also includes system converter, and the system converter connects with the arrangement for detecting and the numerical value comparing unit respectively
Connect；Methods described also includes：The metric flicker value is converted to binary flicker value by the system converter.
Further, the numerical value comparing unit includes N number of digital comparator, and each digital comparator is used to compare
The binary number of two one, the digit for the binary data that wherein N is changed by the flicker value is determined.
The technical scheme that the present embodiment is provided, the flicker value of liquid crystal display panel, miniature control are obtained by arrangement for detecting
Device according to the flicker value obtain to the liquid crystal display panel export common electric voltage value and common electric voltage output device to
Liquid crystal display panel outputting common voltage, adjust automatically simultaneously obtains optimal common electric voltage, eliminates and manually adjusts VR knob-operateds,
And the minimum flicker value of liquid crystal display panel is detected by arrangement for detecting, improve the common electric voltage confidence level of liquid crystal display panel
And precision, improve the production efficiency of liquid crystal display panel.
Example IV
It is further, described in the method for adjusting common voltage of the liquid crystal display panel on the basis of embodiment three
Microcontroller includes numerical value comparing unit and control chip, and above-mentioned steps S320 further comprises：
The current flicker value of the numerical value comparing unit liquid crystal display panel, and the LCD recorded
The last flicker value of plate, the current flicker value of the liquid crystal display panel and the public affairs for being currently applied to the liquid crystal display panel
Common voltage is corresponding, the last flicker value of the liquid crystal display panel and the last public affairs for being applied to the liquid crystal display panel
Common voltage is corresponding；
Control chip increases the public affairs for being applied to the liquid crystal display panel according to the comparative result of the numerical value comparing unit
Common voltage or reduction are applied to the common electric voltage of the liquid crystal display panel, until the flicker value of the liquid crystal display panel is minimum
When, obtain corresponding common electric voltage value.
Further, Fig. 6 is a kind of method for adjusting common voltage for liquid crystal display panel that the embodiment of the present invention four is provided
Schematic flow sheet, as shown in fig. 6, the control chip be used for obtain corresponding common electric voltage value as follows：
Step S410, it is applied to the default common electric voltage value of the liquid crystal display panel；
Step S420, it is applied to the liquid crystal display panel magnitude of voltage smaller than default common electric voltage；
Step S430, judge current flicker value whether be less than previous flicker value, if so, perform step S440, otherwise, perform
Step S450；
Step S440, reduction are applied to the common electric voltage of the liquid crystal display panel；
Step S441, the flicker value of arrangement for detecting detecting, update current flicker value and previous flicker value；
Step S442, judge current flicker value whether be less than previous flicker value, if so, perform step S460, otherwise, perform
Step S440；
Step S450, increase are applied to the default common electric voltage of the liquid crystal display panel；
Step S451, the flicker value of arrangement for detecting detecting, update current flicker value and previous flicker value；
Step S452, judge current flicker value whether be more than previous flicker value, if so, perform step S460, otherwise, perform
Step S450；
Step S460, the corresponding common electric voltage of previous flicker value are optimal common electric voltage；
The technical scheme that the present embodiment is provided, is converted to two by flicker value by the system converter of microcontroller and enters
Number processed, binary number is compared the common electric voltage exported in numerical value comparing unit, and adjust automatically simultaneously obtains optimal public affairs
Common voltage, eliminates and manually adjusts VR knob-operateds, improves the common electric voltage confidence level and precision of liquid crystal display panel, improves
The production efficiency of liquid crystal display panel.
The above described is only a preferred embodiment of the present invention, any formal limitation not is made to the present invention, though
So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention, any to be familiar with this professional technology people
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification
For the equivalent embodiment of equivalent variations, as long as being the technical spirit pair according to the present invention without departing from technical solution of the present invention content
Any simple modification, equivalent variations and modification that above example is made, in the range of still falling within technical solution of the present invention.
Claims (8)
1. a kind of common electric voltage adjustment system of liquid crystal display panel, it is characterised in that including：
Arrangement for detecting, the flicker value for obtaining the liquid crystal display panel；
Microcontroller, is connected with the arrangement for detecting, for being obtained according to the flicker value of the liquid crystal display panel to described
The common electric voltage value of liquid crystal display panel output, and obtain corresponding public during the flicker value minimum of the liquid crystal display panel
Magnitude of voltage；
The microcontroller includes：
The liquid crystal display of numerical value comparing unit, the flicker value current for comparing the liquid crystal display panel, and record
The last flicker value of panel, the current flicker value of the liquid crystal display panel is with being currently applied to the liquid crystal display panel
Common electric voltage is corresponding, and the last flicker value of the liquid crystal display panel is applied to the liquid crystal display panel with the last time
Common electric voltage is corresponding；
Control chip, for the comparative result according to the numerical value comparing unit, increase is applied to the liquid crystal display panel
Common electric voltage or reduction are applied to the common electric voltage of the liquid crystal display panel, until the liquid crystal display panel flicker value most
Hour, obtain corresponding common electric voltage value；
Common electric voltage output device, is connected with the microcontroller, for according to the common electric voltage value to LCD
Plate outputting common voltage.
2. system according to claim 1, it is characterised in that the control chip is used for：
It is applied to the default common electric voltage value of the liquid crystal display panel；
It is applied to the liquid crystal display panel magnitude of voltage smaller than default common electric voltage；
If current flicker value is less than previous flicker value, reduce the common electric voltage for being applied to the liquid crystal display panel, according to detecting
The flicker value of device detecting, updates current flicker value and previous flicker value, by that analogy, until current flicker value is more than previous
Flicker value, the corresponding common electric voltage of previous flicker value is optimal common electric voltage；
If current flicker value is more than previous flicker value, increase is applied to the default common electric voltage of the liquid crystal display panel, according to
The flicker value of arrangement for detecting detecting, updates current flicker value and previous flicker value, if current flicker value is less than previous flicker value,
Increase is applied to the common electric voltage of the liquid crystal display panel, by that analogy, until the current flicker value that arrangement for detecting is detected is big
In previous flicker value, the corresponding common electric voltage of previous flicker value is optimal common electric voltage.
3. system according to claim 1, it is characterised in that the flicker for the liquid crystal display panel that the arrangement for detecting is obtained
It is worth for decimal data, the microcontroller also includes：
System converter, is connected with the arrangement for detecting and the numerical value comparing unit respectively, for by it is metric it is described dodge
Bright value is converted to binary flicker value.
4. the system according to claim 1 or 3, it is characterised in that the numerical value comparing unit include N number of numeric ratio compared with
Device, each digital comparator is used to compare the binary number of two one, the binary system that wherein N is changed by the flicker value
The digit of data is determined.
5. a kind of method for adjusting common voltage of liquid crystal display module panel, it is characterised in that including：
Arrangement for detecting obtains the flicker value of the liquid crystal display panel；
Microcontroller, including numerical value comparing unit and control chip, the microcontroller is according to the flicker value of arrangement for detecting
The common electric voltage value exported to the liquid crystal display panel is obtained, and when obtaining the flicker value minimum of the liquid crystal display panel
Corresponding common electric voltage value includes：
The current flicker value of the numerical value comparing unit liquid crystal display panel, and the LCD recorded
The last flicker value of plate, the current flicker value of the liquid crystal display panel and the public affairs for being currently applied to the liquid crystal display panel
Common voltage is corresponding, the last flicker value of the liquid crystal display panel and the last public affairs for being applied to the liquid crystal display panel
Common voltage is corresponding；
The control chip increases the public affairs for being applied to the liquid crystal display panel according to the comparative result of the numerical value comparing unit
Common voltage or reduction are applied to the common electric voltage of the liquid crystal display panel, until the flicker value of the liquid crystal display panel is minimum
When, obtain corresponding common electric voltage value；
The common electric voltage value that common electric voltage output device is determined according to the microcontroller is exported to liquid crystal display panel
Common electric voltage.
6. method according to claim 5, it is characterised in that the control chip is according to the ratio of the numerical value comparing unit
Relatively result, increase is applied to the common electric voltage of the liquid crystal display panel or reduction is applied to the public of the liquid crystal display panel
Voltage, when the flicker value of the liquid crystal display panel is minimum, obtaining corresponding common electric voltage value includes：
It is applied to the default common electric voltage value of the liquid crystal display panel；
It is applied to the liquid crystal display panel magnitude of voltage smaller than default common electric voltage；
If current flicker value is less than previous flicker value, reduce the common electric voltage for being applied to the liquid crystal display panel, according to detecting
The flicker value of device detecting, updates current flicker value and previous flicker value, by that analogy, until current flicker value is more than previous
Flicker value, the corresponding common electric voltage of previous flicker value is optimal common electric voltage；
If current flicker value is more than previous flicker value, increase is applied to the default common electric voltage of the liquid crystal display panel, according to
The flicker value of arrangement for detecting detecting, updates current flicker value and previous flicker value, if current flicker value is less than previous flicker value,
Increase is applied to the common electric voltage of the liquid crystal display panel, by that analogy, until the current flicker value that arrangement for detecting is detected is big
In previous flicker value, the corresponding common electric voltage of previous flicker value is optimal common electric voltage.
7. method according to claim 5, it is characterised in that the flicker for the liquid crystal display panel that the arrangement for detecting is obtained
It is worth for decimal data, the microcontroller also includes system converter, the system converter is filled with the detecting respectively
Put and numerical value comparing unit connection；Methods described also includes：
The metric flicker value is converted to binary flicker value by the system converter.
8. the method according to claim 5 or 7, it is characterised in that the numerical value comparing unit include N number of numeric ratio compared with
Device, each digital comparator is used to compare the binary number of two one, the binary system that wherein N is changed by the flicker value
The digit of data is determined.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510562774.8A CN105070264B (en) | 2015-09-07 | 2015-09-07 | A kind of common electric voltage adjustment system and method for liquid crystal display panel |
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| CN201510562774.8A CN105070264B (en) | 2015-09-07 | 2015-09-07 | A kind of common electric voltage adjustment system and method for liquid crystal display panel |
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| CN105070264A CN105070264A (en) | 2015-11-18 |
| CN105070264B true CN105070264B (en) | 2017-09-26 |
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| CN105607314A (en) * | 2016-03-17 | 2016-05-25 | 浙江新力光电科技有限公司 | Method and device for calibrating flicker degree of liquid crystal display module |
| CN105895038A (en) * | 2016-05-16 | 2016-08-24 | 深圳天珑无线科技有限公司 | Method and device for driving display module set in liquid crystal display screen |
| CN105976782B (en) * | 2016-07-15 | 2018-12-21 | 武汉华星光电技术有限公司 | A kind of liquid crystal display device and its driving method |
| CN106297711B (en) * | 2016-09-18 | 2019-04-05 | 深圳市华星光电技术有限公司 | Display module driving circuit, driving method and display module |
| CN106501975A (en) * | 2016-11-11 | 2017-03-15 | 深圳市华星光电技术有限公司 | The method of testing and test device of display panels |
| CN107123398A (en) * | 2017-03-21 | 2017-09-01 | 青岛海信电器股份有限公司 | The VCOM voltage adjusting methods and device of LCDs |
| CN108766326B (en) * | 2018-04-25 | 2021-09-03 | 咸阳彩虹光电科技有限公司 | Method and device for obtaining Vcom by adjusting Flicker |
| CN109147709B (en) * | 2018-10-10 | 2021-05-11 | 武汉精测电子集团股份有限公司 | Method and device for multipoint adjusting Flicker of liquid crystal panel |
| CN112102769B (en) * | 2020-10-28 | 2022-09-20 | 业成科技（成都）有限公司 | Display screen common voltage adjusting method and device, computer equipment and storage medium |
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