CN105096782A - Fool-proofing method and system for automatically correcting flicker of display device - Google Patents
Fool-proofing method and system for automatically correcting flicker of display device Download PDFInfo
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Abstract
The invention provides a fool-proofing method and system for automatically correcting flicker of display device. The method comprises: detecting steps of providing a flicker detected picture for a to-be-detected display device, applying control voltages to the common electrode of the display device periodically and circularly, detecting and obtaining the corresponding flicker value, wherein in each cycle period, a plurality of control voltages with different amplitudes are applied to the common electrode of the display device; and judging steps of judging whether the variation of the flicker value corresponding to the control voltages in a plurality of cycle periods satisfies the preset threshold value, and executing the fool-proofing operation if not. The method and the system provided by the invention can avoid the common electrode voltage value errors caused by manual misoperation during the process of automatically correcting the flicker of the display device, and the flickering malfunctions caused by the above process can also be avoided.
Description
Technical field
The present invention relates to the foolproof method in a kind of display device testing process, especially a kind of for the foolproof method in display device automatic calibration scitillation process and system thereof.
Background technology
In the process of display device production adjustment, need the magnitude of voltage (Vcom) getting best public electrode quickly and accurately, avoid the unnecessary mistake caused by human factor, the Flicker value (flicker value) of assurance device within the scope of specification requirement, thus guarantees the display quality of display device.
The flicker origin cause of formation of display device is as shown in Figure 1: wherein, and A representative has the public electrode voltages of error; B represents correct public electrode voltages; C represents the pressure reduction of the positive polarity reduced; D represents the pressure reduction of the negative polarity increased.Visible, in pixel charging process, stray capacitance on panel produces leaping voltage (feedthroughvoltage), causes positive-negative polarity to charge DC deviation (DCoffset), and sets Vcom and can make up the impact that positive-negative polarity charging DC deviation causes.
Each display device all will carry out Vcom correction when dispatching from the factory, and makes positive-negative polarity source voltage equal with the pressure reduction of Vcom, thus controls in specification limit by flicker value, guarantees that every table apparatus reaches optimum efficiency.
By it, mistake for avoiding artificial improper operation to cause in practical operation, so add risk management, judges that whether the Flicker value that records in trimming process is normal, i.e. the display alarm information when there is following 3 kinds of situations, and stopping execution current operation:
The first situation is Flicker_max-Flicker_min<A;
The second situation is Flicker_min>B;
The third situation is Flicker_best – Flicker_min>C;
As long as any one occurring in these three kinds of situations, all need to start risk management.(as a rule, cause the reason of these three kinds of situations, can be optical sensor fault or place mistake or display device self problem or external disturbance etc., repeat no more herein.)
The parameter wherein related to is defined as follows:
Flicker_max: the maximum Flicker value recorded;
Flicker_min: record minimum Flicker value;
Flicker_best: best Vcom corresponding Flicker value;
A, B, C: decision threshold.
As shown in Figures 2 and 3, a kind of magnitude of voltage adjustment System of self-adaptation public electrode mainly comprises base 1, pivot arm 3, hinge 4 and optical sensor 5.Base 1 has display device put area 2, the first end of pivot arm 3 is by hinge 4 articulated base 1, and the second end of pivot arm 3 is provided with optical sensor 5.By the rotation of pivot arm 3, optical sensor 5 can be made to be positioned at the second place away from display device put area 2, namely as shown in Figure 2; Or, optical sensor 5 is fitted the primary importance of display device put area 2, i.e. correct working position, namely as shown in Figure 3.The optical sensor adopted can be divided into high sensor and muting sensitivity sensor two kinds by sensitivity, existing fool proof mode is only effective to muting sensitivity sensor.
Current low fast-response probe is mainly with the form work shown in Fig. 3.The foolproof method of display device automatic calibration flicker is for low fast-response probe, do not place on the display apparatus (as shown in Figure 2) at it, to survey Flicker value almost nil, Flicker value amplitude of variation is less than the threshold value of setting, and this data exception situation can be detected by existing risk management.
And for high sensor, even if do not place (as shown in Figure 2) on the display apparatus, the Flicker value that it records also can along with the change generation change by a relatively large margin of ambient light, the foolproof method Flicker value amplitude of variation of display device automatic calibration flicker will be greater than the threshold value of setting, now existing risk management lost efficacy, thus caused magnitude of voltage adjustment System to occur mistake.
Fig. 2 and Fig. 3 presents optical sensor two kinds possibility duty, and wherein, the duty of Fig. 2 is obviously the duty of mistake, but it has certain probability not detected by existing risk management, thus occurs the result of mistake.
In view of this, foolproof method and the system thereof of the flicker of a kind of display device automatic calibration is inventor provided.
Summary of the invention
The foolproof method that the object of the present invention is to provide a kind of display device automatic calibration to glimmer and system thereof, overcome the difficulty of prior art, can effectively avoid by the improper public electrode voltages value mistake caused of manual operation in display device automatic calibration scitillation process, and generation flicker is bad thus.
According to an aspect of the present invention, provide the foolproof method that a kind of display device automatic calibration glimmers, the method comprises:
Detecting step: provide flicker detection picture to display device to be measured, and to described display device public electrode loop cycle apply control voltage, detect and obtain corresponding flicker value, wherein in each cycle period, apply multiple control voltages of different amplitude to the public electrode of described display device;
Determining step: judge whether the change of the flicker value that described control voltage is corresponding in multiple cycle period meets predetermined threshold value, if do not meet, performs fool proof operation.
Preferably, described determining step comprises:
Whether the absolute value of the difference of the flicker value that the identical control voltage in different cycle period is corresponding is less than or equal to predetermined threshold value, if NO, then starts and performs fool proof operation;
And whether the absolute value of the difference of flicker value corresponding to different control voltages in same cycle period is greater than predetermined threshold value, if NO, then starts and performs fool proof operation.
Preferably, described multiple cycle period comprises at least two cycle periods.
Preferably, described multiple cycle period comprises multiple continuous print cycle period.
Preferably, described flicker detection picture is the picture of light and shade interval circulation.
Preferably, based on control voltage and the corresponding flicker value of the public electrode of the display device described to be measured obtained in described detecting step, at least choose the first control voltage of different amplitude, the second control voltage and corresponding flicker value thereof, carry out described determining step.
Preferably, the first control voltage in different cycle period has the first identical amplitude, and the second control voltage in different cycle period has the second identical amplitude.
Preferably, the magnitude of voltage of described multiple control voltage meets the continuous arithmetic progression of increasing or decreasing.
Preferably, the flicker value corresponding to described first control voltage in described determining step is less than the flicker value corresponding to described second control voltage, states 3 control voltages in detecting step between the amplitude corresponding to minimum value in the first control voltage and all described flicker value to multi-compartment to some extent.
Preferably, the first control voltage in described determining step and between the second control voltage at least interval have 20 control voltages in described detecting step.
Preferably, the absolute value of the difference of the flicker value that flicker value corresponding to the first control voltage in a cycle period is corresponding with each the first control voltage in other cycle periods is less than or equal to the first decibel threshold, and described first decibel threshold is less than or equal to 5 decibels;
The absolute value of the difference of the flicker value that flicker value corresponding to the second control voltage in a cycle period is corresponding with each the second control voltage in other flicker cycles is less than or equal to the second decibel threshold, and described second decibel threshold is less than or equal to 5 decibels;
The absolute value of the difference of the flicker value that flicker value corresponding to the first control voltage in each cycle period is corresponding with the second control voltage is greater than three decibels threshold value, and described three decibels threshold value is more than or equal to 20 decibels.
Preferably, the corresponding flicker value of described detection acquisition comprises:
Utilize a photoelectric sensor to scan described display device, the brightness transition of described display device is become voltage signal, obtain the analoging brightness waveform signal of described display device;
Receive the analoging brightness waveform signal that described photoelectric sensor exports, and convert digital brightness waveform signal to;
Fourier transform is carried out to described digital brightness waveform signal, obtains the amplitude of predeterminated frequency ripple; And
By the amplitude of described predeterminated frequency ripple, obtain the flicker value of described display device.
Preferably, described predeterminated frequency is the switching frequency of the current common electrode signal of described display device.
Preferably, described photoelectric sensor is the high sensitivity photosensors that efficient working range is more than or equal to 100 centimetres;
Or described photoelectric sensor is the muting sensitivity photoelectric sensor that efficient working range is less than or equal to 15 centimetres.
Preferably, described fool proof operation comprises display alarm information and/or stops performing current operation.
Preferably, described each cycle period is 0.5 second.
According to another aspect of the present invention, also provide a kind of automatic correction system with the display device flicker of risk management, this system adopts above-mentioned foolproof method.
Owing to employing above technology, foolproof method and the system thereof of display device automatic calibration flicker of the present invention can effectively be avoided by the improper public electrode voltages value mistake caused of manual operation in display device automatic calibration scitillation process, and generation flicker is bad thus.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is described in detail, to make characteristic of the present invention and advantage more obvious.
Fig. 1 is the schematic diagram producing flicker reason in pixel charging process;
Fig. 2 is the schematic diagram that optical sensor is not placed in display device;
Fig. 3 is the schematic diagram that optical sensor is placed in display device;
Fig. 4 is the contrast schematic diagram of display device light and external environment condition light;
Fig. 5 be first embodiment of the invention two cycle periods in display device light change schematic diagram;
Fig. 6 is the Vcom-Flicker curve synoptic diagram of first embodiment of the invention;
Fig. 7 be second embodiment of the invention two cycle periods in display device light change schematic diagram;
Fig. 8 is the Vcom-Flicker curve synoptic diagram of second embodiment of the invention; And
Fig. 9 is the Vcom-Flicker curve synoptic diagram of third embodiment of the invention.
Reference numeral
1 base
2 display device put areas
3 pivot arms
4 hinges
5 optical sensors
A has the public electrode voltages of error
The public electrode voltages that B is correct
The pressure reduction of C positive polarity
The pressure reduction of D negative polarity
E display device light
F external environment condition light
The brightness that L sensor records
T time
Embodiment
Below will provide detailed description to embodiments of the invention.Although the present invention will carry out setting forth and illustrating in conjunction with some embodiments, it should be noted that the present invention is not merely confined to these embodiments.On the contrary, the amendment carry out the present invention or equivalent replacement, all should be encompassed in the middle of right of the present invention.
In addition, in order to better the present invention is described, in embodiment hereafter, give numerous details.It will be understood by those skilled in the art that do not have these details, the present invention can implement equally.In other example, known structure and parts are not described in detail, so that highlight purport of the present invention.
Whether the foolproof method of display device automatic calibration of the present invention flicker, may be used for detecting optical sensor 5 in adjustment System (autoVcom) as shown in Figure 2,3 in correct working position.In order to avoid the mistake of existing risk management, as shown in Figure 4, the light E of display device is controlled, and people can make its change occurring specific rule, ambient light F is uncontrollable, has randomness and irregularities.The mode of the present invention by the light E of display device and ambient light F is made a distinction, thus distinguish that whether optical sensor is in correct working position.
Unlike the prior art, the foolproof method of the display device automatic calibration flicker in the present invention can be applicable to high sensitivity photosensors and muting sensitivity photoelectric sensor simultaneously.So high sensitivity photosensors can be the photoelectric sensor that efficient working range is more than or equal to 100 centimetres, but not as limit.Muting sensitivity photoelectric sensor can be the photoelectric sensor that efficient working range is less than or equal to 15 centimetres, but not as limit.
The present invention is mainly through setting one group of Vcom value with order to display device according to certain rules, the Flicker value of display device is made to occur the change of specific rule, with this, change of light of display device is separated with the light variation zone of external environment condition, thus can judge whether optical sensor is correctly placed.
The foolproof method of display device automatic calibration flicker of the present invention mainly comprises detecting step and determining step.
Detecting step: provide flicker detection picture to display device to be measured, and to display device public electrode loop cycle apply control voltage, detect and obtain corresponding flicker value, wherein in each cycle period, apply multiple control voltages of different amplitude to the public electrode of display device.Wherein, the magnitude of voltage of multiple control voltage meets the continuous arithmetic progression of increasing or decreasing, but not as limit.The flicker detection picture provided to display device to be measured in the present invention is the picture of light and shade interval circulation, but not as limit.
Determining step: judge whether the change of the flicker value that control voltage is corresponding in multiple cycle period meets predetermined threshold value, if do not meet, performs fool proof operation.Fool proof operation in the present invention comprises display alarm information and/or stops performing current operation, but not as limit.
In detecting step, detect the corresponding flicker value of acquisition and comprise: utilize a photoelectric sensor scanning display apparatus, the brightness transition of display device is become voltage signal, obtain the analoging brightness waveform signal of display device.Then, receive the analoging brightness waveform signal that photoelectric sensor exports, and convert digital brightness waveform signal to.Then, Fourier transform is carried out to digital brightness waveform signal, obtain the amplitude of predeterminated frequency ripple.Finally, by the amplitude of predeterminated frequency ripple, obtain the flicker value of display device.Wherein, predeterminated frequency is the switching frequency of the current common electrode signal of display device.The present invention also can obtain corresponding flicker value by other means, repeats no more herein.
Wherein, based on control voltage and the corresponding flicker value of the public electrode of the display device to be measured obtained in detecting step, at least choose the first control voltage of different amplitude, the second control voltage and corresponding flicker value thereof, the first control voltage in different cycle period has the first identical amplitude, the second control voltage in different cycle period has the second identical amplitude, carries out determining step with these parameters.Each cycle period can be 0.5 second, but not as limit.
Further, the determining step in the present invention also specifically comprises: whether the absolute value of the difference of the flicker value that the identical control voltage in different cycle period is corresponding is less than or equal to predetermined threshold value, if NO, then starts and performs fool proof operation.And whether the absolute value of the difference of flicker value corresponding to different control voltages in same cycle period is greater than predetermined threshold value, if NO, then starts and performs fool proof operation.The condition of determining step of the present invention must meet simultaneously, does not arbitraryly meet, then start and perform fool proof operation.
Further, two arrangement rules below the one group of Vcom value demand fulfillment set in the present invention:
(1) flicker value corresponding to the first control voltage in determining step is less than the flicker value corresponding to the second control voltage, has 3 control voltages in detecting step between the amplitude corresponding to minimum value in the first control voltage and all described flicker value to multi-compartment.
(2) the first control voltage in determining step and between the second control voltage at least between be separated with 20 control voltages in detecting step.
Further, the one group of following predetermined threshold value of Vcom value demand fulfillment be set in the present invention:
The absolute value of the difference of the flicker value that flicker value corresponding to the first control voltage in (1) cycle period is corresponding with each the first control voltage in other cycle periods is less than or equal to the first decibel threshold, first decibel threshold is less than or equal to 5 decibels, but not as limit.
The absolute value of the difference of the flicker value that flicker value corresponding to the second control voltage in (2) cycle periods is corresponding with each the second control voltage in other flicker cycles is less than or equal to the second decibel threshold, second decibel threshold is less than or equal to 5 decibels, but not as limit.
(3) absolute value of the difference of the flicker value that flicker value corresponding to the first control voltage in each cycle period is corresponding with the second control voltage is greater than three decibels threshold value, and three decibels threshold value is more than or equal to 20 decibels, but not as limit.
In order to improve the accuracy of testing result, the present invention is suitable for implementing in multiple continuous print or discontinuous cycle period, and the cycle of enforcement is more, and result is more accurate.Can be two cycle periods, five cycle periods, ten cycle periods or 100 cycle periods, but not as limit.
There is below by way of three groups the embodiment of different parameters, introduce the foolproof method implementation process of display device automatic calibration of the present invention flicker.Use Adjustment system (autoVcom), the process obtaining Flicker value in detecting step repeats no more herein.
first embodiment
As illustrated in Figures 5 and 6, within two cycles, select at two different Vcom to carry out foolproof method of the present invention.First the absolute value presetting the difference of flicker value corresponding to the first control voltage in the cycle period flicker value corresponding with each the first control voltage in other cycle periods is less than or equal to 3db (decibel, decibel), the absolute value of the difference of the flicker value that flicker value corresponding to the second control voltage in a cycle period is corresponding with each the second control voltage in other flicker cycles is less than or equal to 3db, and the absolute value of the difference of flicker value corresponding to the first control voltage in each cycle period flicker value corresponding with the second control voltage is greater than 10db.
Spacing between the reference point of each Vcom preset is 0.1V, within two continuous circulation cycles, set G1, G2, G3 and G4 tetra-points respectively, wherein, in G1, G3 and Fig. 6, the minimum point of Vcom-Flicker curve differs within three reference point, and namely the difference of the Vcom of G1, G3 and minimum point is less than 0.3V.G1, G2 are positioned at the period 1, and G3, G4 are positioned at second round.
The Vcom of G1 is the Flicker that-0.160V, G1 are corresponding is-35.5db;
The Vcom of G2 is-0.260V; The Flicker that G2 is corresponding is-17.3db;
The Vcom of G3 is the Flicker that-0.160V, G3 are corresponding is-35.7db;
The Vcom of G4 is-0.260V; The Flicker that G4 is corresponding is-17.4db;
Judge whether Vcom, Flicker parameter of G1, G2, G3 and G4 tetra-points meets predetermined threshold value simultaneously:
︱ Flicker1-Flicker3 ︱=0.2db≤3db, meets;
︱ Flicker2-Flicker4 ︱=0.1db≤3db, meets;
︱ Flicker1-Flicker2 ︱=18.2db>10db, meets;
︱ Flicker3-Flicker4 ︱=18.3db>10db, meets;
So judge to learn by the foolproof method of display device automatic calibration flicker of the present invention, in these two continuous print cycle periods, optical sensor 5, in correct working position, operates without the need to performing fool proof.
second embodiment
As shown in FIG. 7 and 8, within three cycles, select at two different Vcom to carry out foolproof method of the present invention.First the absolute value presetting the difference of flicker value corresponding to the first control voltage in the cycle period flicker value corresponding with each the first control voltage in other cycle periods is less than or equal to 3db, the absolute value of the difference of the flicker value that flicker value corresponding to the second control voltage in a cycle period is corresponding with each the second control voltage in other flicker cycles is less than or equal to 3db, and the absolute value of the difference of flicker value corresponding to the first control voltage in each cycle period flicker value corresponding with the second control voltage is greater than 10db.
Spacing between the reference point of each Vcom preset is 0.1V, within three continuous circulation cycles, set G1, G2, G3, G4, G5 and G6 six points respectively, wherein, in G1, G3, G5 and Fig. 6, the minimum point of Vcom-Flicker curve differs within three reference point, and namely the difference of the Vcom of G1, G3, G5 and minimum point is less than 0.3V.G1, G2 are positioned at the period 1, and G3, G4 are positioned at second round, and G5, G6 are positioned at the period 3.
The Vcom of G1 is the Flicker that-0.160V, G1 are corresponding is-35.5db;
The Vcom of G2 is-0.260V; The Flicker that G2 is corresponding is-17.3db;
The Vcom of G3 is the Flicker that-0.160V, G3 are corresponding is-35.7db;
The Vcom of G4 is-0.260V; The Flicker that G4 is corresponding is-17.4db;
The Vcom of G5 is the Flicker that-0.160V, G5 are corresponding is-25.3db;
The Vcom of G6 is-0.260V; The Flicker that G6 is corresponding is-17.8db;
Judge whether Vcom, Flicker parameter of G1, G2, G3, G4, G5 and G6 six points meets predetermined threshold value simultaneously:
︱ Flicker1-Flicker3 ︱=0.2db≤3db, meets;
︱ Flicker1-Flicker5 ︱=10.2db>3db, does not meet;
︱ Flicker2-Flicker4 ︱=0.1db≤3db, meets;
︱ Flicker2-Flicker6 ︱=0.5db≤3db, meets;
︱ Flicker1-Flicker2 ︱=18.2db>10db, meets;
︱ Flicker3-Flicker4 ︱=18.3db>10db, meets;
︱ Flicker5-Flicker6 ︱=7.5db<10db, does not meet;
So, judge to learn by the foolproof method of display device automatic calibration flicker of the present invention, in these three continuous print cycle periods, optical sensor 5 is not in correct working position, need perform fool proof operation, then adjustment System display alarm information and stop perform current operation.
3rd embodiment
As shown in Figure 9, within two cycles, select at three different Vcom to carry out foolproof method of the present invention.First the absolute value presetting the difference of flicker value corresponding to the first control voltage in the cycle period flicker value corresponding with each the first control voltage in other cycle periods is less than or equal to 3db, the absolute value of the difference of the flicker value that flicker value corresponding to the second control voltage in a cycle period is corresponding with each the second control voltage in other flicker cycles is less than or equal to 3db, and the absolute value of the difference of flicker value corresponding to the first control voltage in each cycle period flicker value corresponding with the second control voltage is greater than 10db.
Spacing between the reference point of each Vcom preset is 0.1V, within two continuous circulation cycles, set G1, G2, G3, G4, G5 and G6 six points respectively, wherein, in G2, G5 and Fig. 6, the minimum point of Vcom-Flicker curve differs within three reference point, and namely the difference of the Vcom of G2, G5 and minimum point is less than 0.3V.G1, G2, G3 are positioned at the period 1, and G4, G5, G6 are positioned at second round.
The Vcom of G1 is the Flicker that-0.060V, G1 are corresponding is-22.4db;
The Vcom of G2 is-0.160V; The Flicker that G2 is corresponding is-35.6db;
The Vcom of G3 is the Flicker that-0.260V, G3 are corresponding is-17.3db;
The Vcom of G4 is the Flicker that-0.060V, G4 are corresponding is-22.4db;
The Vcom of G5 is-0.160V; The Flicker that G5 is corresponding is-35.8db;
The Vcom of G6 is the Flicker that-0.260V, G6 are corresponding is-17.1db;
Judge whether Vcom, Flicker parameter of G1, G2, G3, G4, G5 and G6 six points meets predetermined threshold value simultaneously:
︱ Flicker1-Flicker4 ︱=0≤3db, meets;
︱ Flicker2-Flicker5 ︱=0.2≤3db, meets;
︱ Flicker3-Flicker6 ︱=0.2≤3db, meets;
︱ Flicker1-Flicker2 ︱=13.2>10db, meets;
︱ Flicker2-Flicker3 ︱=18.3>10db, meets;
︱ Flicker4-Flicker5 ︱=13.4>10db, meets;
︱ Flicker5-Flicker6 ︱=18.7>10db, meets;
So judge to learn by the foolproof method of display device automatic calibration flicker of the present invention, in these two continuous print cycle periods, optical sensor 5 is same in correct working position, without the need to performing fool proof operation.
The present invention also provides a kind of automatic correction system with the display device flicker of risk management, this system adopts above-mentioned foolproof method, coordinate the magnitude of voltage adjustment System (autoVcom) with the self-adaptation public electrode of optical sensor to find the Vcom (magnitude of voltage of public electrode) of the best of display device, repeat no more herein.
In summary, foolproof method and the system thereof of display device automatic calibration flicker of the present invention can effectively be avoided by the improper public electrode voltages value mistake caused of manual operation in display device automatic calibration scitillation process, and generation flicker is bad thus.
Below be only embody rule example of the present invention, protection scope of the present invention is not constituted any limitation.In addition to the implementation, the present invention can also have other embodiment.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop within the present invention's scope required for protection.
Claims (17)
1. a foolproof method for display device automatic calibration flicker, it is characterized in that, the method comprises:
Detecting step: provide flicker detection picture to display device to be measured, and to described display device public electrode loop cycle apply control voltage, detect and obtain corresponding flicker value, wherein in each cycle period, apply multiple control voltages of different amplitude to the public electrode of described display device;
Determining step: judge whether the change of the flicker value that described control voltage is corresponding in multiple cycle period meets predetermined threshold value, if do not meet, performs fool proof operation.
2. the foolproof method of display device automatic calibration flicker as claimed in claim 1, it is characterized in that, described determining step comprises:
Whether the absolute value of the difference of the flicker value that the identical control voltage in different cycle period is corresponding is less than or equal to predetermined threshold value, if NO, then starts and performs fool proof operation;
And whether the absolute value of the difference of flicker value corresponding to different control voltages in same cycle period is greater than predetermined threshold value, if NO, then starts and performs fool proof operation.
3. the foolproof method of display device automatic calibration flicker as claimed in claim 2, it is characterized in that, described multiple cycle period comprises at least two cycle periods.
4. the foolproof method of display device automatic calibration flicker as claimed in claim 2, it is characterized in that, described multiple cycle period comprises multiple continuous print cycle period.
5. the foolproof method of display device automatic calibration flicker as claimed in claim 1, is characterized in that: described flicker detection picture is the picture of light and shade interval circulation.
6. the foolproof method of display device automatic calibration flicker as claimed in claim 2, it is characterized in that, based on control voltage and the corresponding flicker value of the public electrode of the display device described to be measured obtained in described detecting step, at least choose the first control voltage of different amplitude, the second control voltage and corresponding flicker value thereof, carry out described determining step.
7. the foolproof method of display device automatic calibration flicker as claimed in claim 6, it is characterized in that, the first control voltage in different cycle period has the first identical amplitude, and the second control voltage in different cycle period has the second identical amplitude.
8. the foolproof method of display device automatic calibration flicker as claimed in claim 7, it is characterized in that, the magnitude of voltage of described multiple control voltage meets the continuous arithmetic progression of increasing or decreasing.
9. the foolproof method of display device automatic calibration flicker as claimed in claim 8, it is characterized in that: the flicker value corresponding to described first control voltage in described determining step is less than the flicker value corresponding to described second control voltage, between the amplitude corresponding to minimum value in the first control voltage and all described flicker value, state 3 control voltages in detecting step to multi-compartment to some extent.
10. the foolproof method of display device automatic calibration flicker as claimed in claim 8, is characterized in that: the first control voltage in described determining step and between the second control voltage at least interval have 20 control voltages in described detecting step.
The foolproof method of 11. display device automatic calibration flickers as claimed in claim 6, it is characterized in that, the absolute value of the difference of the flicker value that flicker value corresponding to the first control voltage in a cycle period is corresponding with each the first control voltage in other cycle periods is less than or equal to the first decibel threshold, and described first decibel threshold is less than or equal to 5 decibels;
The absolute value of the difference of the flicker value that flicker value corresponding to the second control voltage in a cycle period is corresponding with each the second control voltage in other flicker cycles is less than or equal to the second decibel threshold, and described second decibel threshold is less than or equal to 5 decibels;
The absolute value of the difference of the flicker value that flicker value corresponding to the first control voltage in each cycle period is corresponding with the second control voltage is greater than three decibels threshold value, and described three decibels threshold value is more than or equal to 20 decibels.
The foolproof method of 12. display device automatic calibration flickers as claimed in claim 1, it is characterized in that, described detection obtains corresponding flicker value and comprises:
Utilize a photoelectric sensor to scan described display device, the brightness transition of described display device is become voltage signal, obtain the analoging brightness waveform signal of described display device;
Receive the analoging brightness waveform signal that described photoelectric sensor exports, and convert digital brightness waveform signal to;
Fourier transform is carried out to described digital brightness waveform signal, obtains the amplitude of predeterminated frequency ripple; And
By the amplitude of described predeterminated frequency ripple, obtain the flicker value of described display device.
The foolproof method of 13. display device automatic calibration flickers as claimed in claim 12, is characterized in that: described predeterminated frequency is the switching frequency of the current common electrode signal of described display device.
The foolproof method of 14. display device automatic calibration flickers as claimed in claim 12, is characterized in that: described photoelectric sensor is the high sensitivity photosensors that efficient working range is more than or equal to 100 centimetres;
Or described photoelectric sensor is the muting sensitivity photoelectric sensor that efficient working range is less than or equal to 15 centimetres.
The foolproof method of 15. display device automatic calibration flickers as claimed in claim 1, is characterized in that: described fool proof operation comprises display alarm information and/or stops performing current operation.
The foolproof method of 16. display device automatic calibration flickers as claimed in claim 1, is characterized in that: described each cycle period is 0.5 second.
The automatic correction system that 17. 1 kinds of display device with risk management are glimmered, it is characterized in that, this system adopts the foolproof method as described in claim 1 to 16.
Priority Applications (1)
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| CN107464513A (en) * | 2017-09-18 | 2017-12-12 | 惠科股份有限公司 | The film flicker automatic checkout system and detection method of a kind of display panel |
| CN110599935A (en) * | 2019-08-26 | 2019-12-20 | 昆山龙腾光电有限公司 | Automatic adjusting device and automatic adjusting method for public voltage |
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| US11776101B1 (en) | 2022-12-15 | 2023-10-03 | Microsoft Technology Licensing, Llc | Optical sensor signal processing for visual artifact detection and display self-diagnostics |
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