CN102542963A - Method and system for automatically adjusting VCOM voltage of liquid crystal module product - Google Patents
Method and system for automatically adjusting VCOM voltage of liquid crystal module product Download PDFInfo
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- CN102542963A CN102542963A CN2012100409495A CN201210040949A CN102542963A CN 102542963 A CN102542963 A CN 102542963A CN 2012100409495 A CN2012100409495 A CN 2012100409495A CN 201210040949 A CN201210040949 A CN 201210040949A CN 102542963 A CN102542963 A CN 102542963A
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Abstract
The invention discloses method for automatically adjusting a VCOM voltage of a liquid crystal module product, comprising the following step: a flickering degree acquisition device receives a control instruction sent from a computer to detect frames displayed by a liquid crystal display so as to obtain a flickering degree value, and then judges whether the value is in a preset range: if the value is in the preset range, the value of VCOM does not need to be adjusted, and the adjustment is finished, and if the value is not in the preset range, according to the acquired flickering degree value which is not in the preset range, the VCOM voltage value of the liquid crystal display is adjusted by the computer to be in the preset range. According to the method, the flickering degree of the liquid crystal display is measured in a quantitative way, and the automatic adjustment is realized by the computer, so that the reliability of VCOM voltage adjustment is guaranteed, the labor intensity of workers is reduced, the production efficiency is enhanced, and the automatic adjustment on the VCOM voltage in a production line can be realized. Simultaneously, the problems of over strong subjectivity and unstable quality due to manual adjustment are overcome.
Description
Technical field
The present invention relates to a kind of liquid crystal module product VCOM voltage automatic adjusting method and system.
Background technology
Same industry liquid crystal module manufacturer is when carrying out the production of module product, and VCOM voltage adjustment operation basically all is to adopt the method for artificial adjustment to carry out.Operating personnel adjust the size of VCOM value in the I2C bus adjustment instrument on one side, Yi Bian observe the flicker level of LCD screen.This labor intensity is bigger, and production efficiency is lower, and since flicker level because the quantitative test data of neither one, product quality also is difficult to be guaranteed.
Summary of the invention
To the problems referred to above, the object of the present invention is to provide a kind of liquid crystal module product VCOM voltage automatic adjusting method and system, the subjectivity of having avoided artificial adjustment to bring is too strong, the quality problem of unstable.
For achieving the above object, a kind of liquid crystal module product VCOM voltage automatic adjusting method according to the invention may further comprise the steps:
Whether (1) steering order sent of flicker degree harvester receiving computer detects LCD pictures, obtains flicker degree value, judge should be worth in the preset range value:
If this value then need not adjusted the VCOM value in the preset range value, then adjustment finishes;
Otherwise, get into set-up procedure (2);
(2) computing machine is adjusted the VCOM magnitude of voltage in the liquid crystal display according to the not flicker degree value in the preset range value that collects, and makes said flicker degree value in preset range;
(3) repeat above-mentioned steps (1).
Preferably, the method for adjustment in the step (2) is specially and adopts the size of adjustment register value that the size of VCOM magnitude of voltage is adjusted.
Preferably, when adjustment VCOM magnitude of voltage, adopt coarse adjustment and/or fine tuning mode.
Preferably, said coarse adjustment mode is with the write order of growing step-length the VCOM magnitude of voltage at least once to be changed, to make flicker degree value after the change near the preset range value or be positioned within the preset range value as early as possible;
And/or said fine tuning mode is with the write order of lacking step-length the VCOM magnitude of voltage at least once to be changed, so that be positioned within the preset range value after fine tuning changes near the flicker degree value after the change of preset range value.
The concrete method of adjustment of preferably, carrying out coarse adjustment and fine tuning is:
Coarse adjustment write order with positive step-length at least once changes the VCOM magnitude of voltage, making flicker degree value after the change near preset range as early as possible, and shows flicker degree value change trend curve;
At least once change with the fine tuning write order of the negative step-length VCOM magnitude of voltage after to coarse adjustment according to flicker degree change trend curve, the flicker degree value after changing is positioned within the preset range value.
Preferably, when N platform liquid crystal display was adjusted, the mean value of the adjusted value sum that the N-1 platform liquid crystal display after adjustment finished is preserved was adjusted the VCOM magnitude of voltage as the adjusted value of N platform liquid crystal display, to change flicker degree value.
For achieving the above object, a kind of liquid crystal module product VCOM voltage automatic adjustment system according to the invention is characterized in that, the flicker degree harvester, signal generator and the control panel that comprise computing machine and be connected with computing machine, wherein;
Signal generator is used for sending signal data to liquid crystal display to be measured;
Flicker degree harvester, the flicker degree value that is used to gather liquid crystal display to be measured, and send out data value deaf and give computing machine;
Control panel is used for receiving computer the analyzing and processing order of data value is instructed to sending the adjustment of VCOM voltage in the liquid crystal display to be measured;
The flicker degree value that described computing machine is used for collecting according to flicker degree harvester is sent VCOM magnitude of voltage adjustment instruction by preset program subtend control panel, to change original flicker degree value.
Preferably, said computing machine is connected through USB interface with flicker degree harvester.
Preferably, said computing machine is connected through universal serial bus with signal generator.
Preferably, said computing machine is connected through universal serial bus with control panel.
Beneficial effect of the present invention is:
The present invention uses a computer and realizes adjustment automatically through the screen flicker degree is carried out quantitative measurment, has guaranteed the reliability of VCOM voltage adjustment, has reduced working strength of workers, has improved production efficiency, has realized automatic adjustment VCOM voltage on the production line.Time by original average about 30S of manual work adjustment foreshortens to about present 5S, and production efficiency has improved 2/3rds.Simultaneously, the subjectivity of having avoided artificial adjustment to bring is too strong, the quality problem of unstable.
Description of drawings
Fig. 1 is the schematic flow sheet of the said liquid crystal module product of embodiment of the invention VCOM voltage automatic adjusting method;
Fig. 2 is the structural representation of the said liquid crystal module product of embodiment of the invention VCOM voltage automatic adjustment system.
Embodiment
Below in conjunction with Figure of description the present invention is done further description.
The present invention uses a computer and realizes the automatic adjustment of VCOM voltage through liquid crystal display flicker degree value is carried out quantitative measurment.As shown in Figure 1, the said a kind of liquid crystal module product VCOM voltage automatic adjusting method of the embodiment of the invention may further comprise the steps:
Whether (1) steering order sent of flicker degree harvester receiving computer detects LCD pictures, obtains flicker degree value, judge should be worth in the preset range value:
If this value then need not adjusted the VCOM value in the preset range value, then adjustment finishes;
Otherwise, get into set-up procedure (2);
(2) computing machine is adjusted the VCOM magnitude of voltage in the liquid crystal display according to the not flicker degree value in the preset range value that collects, and makes said flicker degree value in preset range;
(3) repeat above-mentioned steps (1).
Wherein, the VCOM magnitude of voltage is to be kept in the register of liquid crystal display hardware circuit, can carry out the change of VCOM value through changing register value, when regulating demonstration, is that register value is write down demonstration therefore.
When adjustment VCOM magnitude of voltage, adopt coarse adjustment and fine tuning dual mode.
Down in the face of the dual mode explanation of making explanations:
Said coarse adjustment mode is with the write order of growing step-length the VCOM magnitude of voltage at least once to be changed, to make flicker degree value after the change near the preset range value or be positioned within the preset range value as early as possible.Briefly, step-length is exactly the term in the program, lets a numerical value in each computing, add that certain number (this is a step-length) repeats this computing.For adjustment VCOM magnitude of voltage, the corresponding meeting of VCOM magnitude of voltage produces a flicker degree value, for the first time liquid crystal display is being detected flicker degree value, and this data value is not in preset range.Therefore, need in the fast as far as possible time, make the flicker degree value of repeated detection, in order to avoid cause complicated to the adjustment operation near value range.Also have a kind of possibility, when when carrying out coarse adjustment, after certain repeated step-length adjustment, detected flicker degree value was just in time in this scope.
Said fine tuning mode is with the write order of lacking step-length the VCOM magnitude of voltage at least once to be changed, so that be positioned within the preset range value after fine tuning changes near the flicker degree value after the change of preset range value.Briefly, step-length is exactly the term in the program, lets a numerical value in each computing, add that certain number (this is a step-length) repeats this computing.For adjustment VCOM magnitude of voltage, the corresponding meeting of VCOM magnitude of voltage produces a flicker degree value, and the flicker degree value after making change through above-mentioned coarse adjustment mode is near the preset range value.This time, select the short computing of step-length, be unlikely to cross the preset range value and make the flicker degree lower or higher.
The concrete method of adjustment of carrying out coarse adjustment and fine tuning simultaneously that is in course of adjustment is:
Coarse adjustment write order with positive step-length at least once changes the VCOM magnitude of voltage, making flicker degree value after the change near preset range as early as possible, and shows flicker degree value change trend curve;
At least once change with the fine tuning write order of the negative step-length VCOM magnitude of voltage after to coarse adjustment according to flicker degree change trend curve, the flicker degree value after changing is positioned within the preset range value.
With embodiment to the said process explanation that makes an explanation:
Embodiment 1:
At first design the correspondence table of this embodiment with coarse adjustment numerical value that mode is changed:
| Register value | Coarse adjustment steps | Flicker degree value (%) | Preset range value (%) |
| 100 | 0 | 50 | 0-10 |
| 90 | -10 | 25 | 0-10 |
| 80 | -10 | 5 | 0-10 |
At first, the flicker degree value of measuring when liquid crystal display to be measured is adjusted not is 50%, and this moment, register value was 100 units, and the liquid crystal display preset range is 0-10%, so this liquid crystal display need carry out computing machine and adjusts automatically.Because flicker degree value and preset range value differ bigger, so adopt the coarse adjustment mode to adjust, the coarse adjustment steps that register value is set is-10 units.After the adjustment, when register value was 90 units, the flicker degree was 25%, not in the preset range value; When register value was 80 units, flicker degree value was 5%, and in the preset range value, then adjustment finishes.
Embodiment 2:
At first design the correspondence table of this embodiment with coarse adjustment numerical value that mode is changed:
| Register value | Coarse adjustment steps | Flicker degree value (%) | Preset range value (%) |
| 100 | 0 | 80 | 0-10 |
| 92 | -8 | 60 | 0-10 |
| 84 | -8 | 30 | 0-10 |
| 76 | -8 | 15 | 0-10 |
| 68 | -8 | 20 | 0-10 |
At first, the flicker degree value of measuring when liquid crystal display to be measured is adjusted not is 80%, and this moment, register value was 100 units, and the liquid crystal display preset range is 0-10%, so this liquid crystal display need carry out computing machine and adjusts automatically.Because flicker degree value and preset range value differ bigger, so adopt the coarse adjustment mode to adjust, the coarse adjustment steps that register value is set is-8 units.After the adjustment, when register value was 92 units, the flicker degree was 60%, not in the preset range value; When register value was 84 units, flicker degree value was 30%, not in the preset range value; When register value was 76 units, flicker degree value was 15%; When register value was 68 units, flicker degree value was 20%.Can know from above, in rising trend from the value that flicker degree value 15% is measured later on, therefore adopt the fine tuning mode to adjust.
| Register value | The fine tuning step-length | Flicker degree value (%) | Preset range value (%) |
| 68 | 0 | 20 | 0-10 |
| 70 | +2 | 11 | 0-10 |
| 72 | +2 | 8 | 0-10 |
To above-mentioned flicker degree value is that 20% o'clock register value adopts the fine tuning mode to adjust, and the fine tuning step-length is+2 units.After the adjustment, when register value was 70 units, flicker degree value was 11%, not in the preset range value; When register value was 72, flicker degree value was 8%, and in the preset range value, adjustment finishes.
Embodiment 3:
At first design the correspondence table of this embodiment with coarse adjustment numerical value that mode is changed:
| Register value | Coarse adjustment steps | Flicker degree value (%) | Preset range value (%) |
| 100 | 0 | 13 | 0-10 |
| 95 | -5 | 15 | 0-10 |
At first, the flicker degree value of measuring when liquid crystal display to be measured is adjusted not is 13%, and this moment, register value was 100 units, and the liquid crystal display preset range is 0-10%, so this liquid crystal display need carry out computing machine and adjusts automatically.At first adopt the coarse adjustment mode to adjust, the coarse adjustment steps that register value is set is-5 units.After the adjustment, when register value was 95 units, the flicker degree was 15%, not in the preset range value.Can know from above, in rising trend from the value that flicker degree value 13% is measured later on, therefore only adopt the fine tuning mode to adjust.
| Register value | The fine tuning step-length | Flicker degree value (%) | Preset range value (%) |
| 95 | 0 | 15 | 0-10 |
| 96 | +1 | 11 | 0-10 |
| 97 | +1 | 7 | 0-10 |
To above-mentioned flicker degree value is that 15% o'clock register value adopts the fine tuning mode to adjust, and the fine tuning step-length is+1 unit.After the adjustment, when register value was 96 units, flicker degree value was 11%, not in the preset range value; When register value was 97, flicker degree value was 7%, and in the preset range value, adjustment finishes.
Liquid crystal module producer once can produce liquid crystal display in batch; When these liquid crystal displays being detected adjustment; N platform liquid crystal display is adjusted; The mean value of the adjusted value sum that the N-1 platform liquid crystal display after need adjustment being finished is preserved is adjusted the VCOM magnitude of voltage as the adjusted value of N platform liquid crystal display, to change flicker degree value.
Specific explanations is:
Computing machine sends the OK signal after adjusting first liquid crystal display success automatically.No matter be to pass through coarse adjustment mode or fine tuning mode or coarse adjustment and fine tuning common method during the course, the register value preservation that the register in this liquid crystal display all can be when satisfying flicker degree value scope can be designated as first adjusted value.
When testing second liquid crystal display, the first above-mentioned adjusted value is write in second register in the liquid crystal display, register value changes the VCOM magnitude of voltage, thus corresponding change flicker degree value.Measure flicker degree value, see whether meet the requirements,, continue to preserve first adjusted value, can be designated as second adjusted value if meet; If do not meet, then repeat the course of work of above-mentioned coarse adjustment mode or fine tuning mode or coarse adjustment and fine tuning common method and adjust, after success, obtain complete adjusted value, can be designated as second adjusted value, and in computing machine, preserve second adjusted value.
When testing the 3rd liquid crystal display, write in the 3rd register in the liquid crystal display after the first above-mentioned adjusted value and the second adjusted value sum averaged, register value changes the VCOM magnitude of voltage, thus corresponding change flicker degree value.Measure flicker degree value, see whether meet the requirements,, preserve this mean value, can be designated as the 3rd adjusted value if meet; If do not meet, then repeat the course of work of above-mentioned coarse adjustment mode or fine tuning mode or coarse adjustment and fine tuning common method and adjust, after success, obtain complete adjusted value, can be designated as the 3rd adjusted value, and in computing machine, preserve the 3rd adjusted value.
And the like ...
When testing N platform liquid crystal display; With the first above-mentioned adjusted value, second adjusted value, the 3rd adjusted value ... write after N-1 adjusted value sum is averaged in the register in the N platform liquid crystal display; Register value changes the VCOM magnitude of voltage, thus corresponding change flicker degree value.Measure flicker degree value, see whether meet the requirements,, preserve this mean value, can be designated as the N adjusted value if meet; If do not meet, then repeat the course of work of above-mentioned coarse adjustment mode or fine tuning mode or coarse adjustment and fine tuning common method and adjust, after success, obtain complete adjusted value, can be designated as the N adjusted value, and in computing machine, preserve the N adjusted value.
For achieving the above object, as shown in Figure 2, a kind of liquid crystal module product VCOM voltage automatic adjustment system according to the invention, computing machine 1 and the flicker degree harvester 2, signal generator 4 and the control panel 3 that are connected with computing machine 1, wherein;
Signal generator is used for sending signal data to liquid crystal display to be measured;
Flicker degree harvester, the flicker degree value that is used to gather liquid crystal display 5 to be measured, and send out data value deaf and give computing machine;
Control panel is used for receiving computer the analyzing and processing order of data value is instructed to sending the adjustment of VCOM voltage in the liquid crystal display to be measured;
The flicker degree value that described computing machine is used for collecting according to flicker degree harvester is sent VCOM magnitude of voltage adjustment instruction by preset program subtend control panel, to change original flicker degree value.
Said computing machine is connected through USB interface with flicker degree harvester.Said computing machine is connected through universal serial bus with signal generator.Said computing machine is connected through universal serial bus with control panel.Wherein, said universal serial bus is the RS232 bus.During work, the VCOM chip on the register in control panel and the liquid crystal module carries out communication, change VCOM magnitude of voltage.
The concrete course of work is:
At first, the computer control signal generator keeps sending signal data to liquid crystal display.The control command of flicker degree harvester receiving computer will feed back to computing machine from the flicker degree value that liquid crystal display records, the fixing software program of operation in the computing machine; At first in the hardware circuit register of liquid crystal display, sending coarse adjustment order through control panel, is+10 write order such as step-length, and VCOM value in the register is added 10; After the VCOM value changes; Color analyzer records flicker degree value once more, and feeds back to computing machine, and computing machine should be worth with reference value and compare; If then qualified, no longer continue to measure this liquid crystal display less than reference value.If greater than, computing machine is preserved these flicker degree values, and draws certain curve; If find that flicker degree value curve is in rising trend, all, explain that the VCOM magnitude of voltage is big greater than 10% the reference value of being scheduled to; So adopt the mode of fine tuning, be 3 such as step-length, repeat said process; Reduce in 10% until flicker degree value, reach criterion of acceptability.
After computing machine is adjusted first liquid crystal display success automatically, send the OK signal, preserve this VCOM magnitude of voltage in this liquid crystal display register; Computing machine also writes down simultaneously this first adjusted value, when second liquid crystal display of test, at first this first adjusted value is write in second the register; Measure its flicker degree value, see whether also meet the requirements, if meet; Continue to preserve its first adjusted value,, then repeat the above-mentioned course of work and adjust if do not meet; After the success, obtain second adjusted value, in computing machine, preserve second adjusted value.Thereby when test the 3rd time, write in the 3rd register after the first, the second adjusted value averaged, measure its flicker degree ...
In this method of work, flicker degree harvester can use color analyzer, but is not limited to use the measurement of color analyzer degree of flicker, also can use other instruments or build circuit voluntarily.The adjustment software program that computing machine is formulated also can improve.Step-length such as coarse adjustment also can be+10, fine tuning can+3, perhaps coarse adjustment steps be+5, the fine tuning step-length is-1, can set on computers according to actual conditions.
More than; Be merely preferred embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technician who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claim was defined.
Claims (10)
1. a liquid crystal module product VCOM voltage automatic adjusting method is characterized in that, may further comprise the steps:
Whether (1) steering order sent of flicker degree harvester receiving computer detects LCD pictures, obtains flicker degree value, judge should be worth in the preset range value:
If this value then need not adjusted the VCOM value in the preset range value, then adjustment finishes;
Otherwise, get into set-up procedure (2);
(2) computing machine is adjusted the VCOM magnitude of voltage in the liquid crystal display according to the not flicker degree value in the preset range value that collects, and makes said flicker degree value in preset range;
(3) repeat above-mentioned steps (1).
2. liquid crystal module product VCOM voltage automatic adjusting method according to claim 1 is characterized in that, the method for adjustment in the step (2) is specially and adopts the size of adjustment register value that the size of VCOM magnitude of voltage is adjusted.
3. liquid crystal module product VCOM voltage automatic adjusting method according to claim 1 is characterized in that, when adjustment VCOM magnitude of voltage, adopts coarse adjustment and/or fine tuning mode.
4. liquid crystal module product VCOM voltage automatic adjusting method according to claim 3; It is characterized in that; Said coarse adjustment mode is with the write order of growing step-length the VCOM magnitude of voltage at least once to be changed, to make flicker degree value after the change near the preset range value or be positioned within the preset range value as early as possible;
And/or said fine tuning mode is with the write order of lacking step-length the VCOM magnitude of voltage at least once to be changed, so that be positioned within the preset range value after fine tuning changes near the flicker degree value after the change of preset range value.
5. liquid crystal module product VCOM voltage automatic adjusting method according to claim 4 is characterized in that the concrete method of adjustment of carrying out coarse adjustment and fine tuning is:
Coarse adjustment write order with positive step-length at least once changes the VCOM magnitude of voltage, making flicker degree value after the change near preset range as early as possible, and shows flicker degree value change trend curve;
At least once change with the fine tuning write order of the negative step-length VCOM magnitude of voltage after to coarse adjustment according to flicker degree change trend curve, the flicker degree value after changing is positioned within the preset range value.
6. liquid crystal module product VCOM voltage automatic adjusting method according to claim 1; It is characterized in that; When N platform liquid crystal display is adjusted; The mean value of the adjusted value sum that the N-1 platform liquid crystal display after adjustment finished is preserved is adjusted the VCOM magnitude of voltage as the adjusted value of N platform liquid crystal display, to change flicker degree value.
7. a liquid crystal module product VCOM voltage automatic adjustment system is characterized in that, the flicker degree harvester, signal generator and the control panel that comprise computing machine and be connected with computing machine, wherein;
Signal generator is used for sending signal data to liquid crystal display to be measured;
Flicker degree harvester, the flicker degree value that is used to gather liquid crystal display to be measured, and send out data value deaf and give computing machine;
Control panel is used for receiving computer the analyzing and processing order of data value is instructed to sending the adjustment of VCOM voltage in the liquid crystal display to be measured;
The flicker degree value that described computing machine is used for collecting according to flicker degree harvester is sent VCOM magnitude of voltage adjustment instruction by preset program subtend control panel, to change original flicker degree value.
8. liquid crystal module product VCOM voltage automatic adjustment system according to claim 7 is characterized in that said computing machine is connected through USB interface with flicker degree harvester.
9. liquid crystal module product VCOM voltage automatic adjustment system according to claim 7 is characterized in that said computing machine is connected through universal serial bus with signal generator.
10. liquid crystal module product VCOM voltage automatic adjustment system according to claim 7 is characterized in that said computing machine is connected through universal serial bus with control panel.
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Application publication date: 20120704 |