CN103531168B - The adjusting gear of video picture performance and method - Google Patents
The adjusting gear of video picture performance and method Download PDFInfo
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- CN103531168B CN103531168B CN201310508384.3A CN201310508384A CN103531168B CN 103531168 B CN103531168 B CN 103531168B CN 201310508384 A CN201310508384 A CN 201310508384A CN 103531168 B CN103531168 B CN 103531168B
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Abstract
The embodiment of the present invention provides adjusting gear and the method for video picture performance.Display module is provided with reference voltage input port, and is connected with reference voltage feedback signal line, wherein: described reference voltage input port, for being used as the voltage of data display benchmark to the input of display module; Described reference voltage feedback signal line, for exporting away the signal of the reference voltage of Real-time Feedback after display module outputting data signals; Described device comprises: acquisition module, starts after input has desirable reference voltage signal, to gather the first signal that in first time period, described reference voltage feedback signal line exports for described reference voltage input port; First adjusting module, for according to described first signal, adjusts the input signal of described reference voltage input port.The adjustment of the video picture performance of embodiment of the present invention support display module.
Description
Technical field
The present invention relates to display technique field, particularly relate to adjusting gear and the method for video picture performance.
Background technology
Liquid crystal display is owing to certainly existing stray capacitance in the design, due to the existence of stray capacitance in procedure for displaying, in practical work process, when the voltage that signal exports changes, the change of voltage is understood the stray capacitance between data line and pixel electrode etc. and transmits, simultaneously again due to the coupling of liquid crystal capacitance, cause the skew of reference voltage (Vcom), thus cause desirable Vcom and actual Vcom deviation to some extent, then the video picture performance of liquid crystal display is had an impact thus, such as, this deviation can make positive and negative viewing area present asymmetry relative to Vcom, and during long time loading, pixilated upper electrodes can be caused to produce DC component, thus cause image retention.
Summary of the invention
In view of this, the object of the embodiment of the present invention is to provide adjusting gear and the method for video picture performance, to support the adjustment of the video picture performance showing module.
For solving the problems of the technologies described above, the embodiment of the present invention provides scheme as follows:
The embodiment of the present invention provides a kind of adjusting gear of the video picture performance for showing module, display module is provided with reference voltage input port, and is connected with reference voltage feedback signal line, wherein:
Described reference voltage input port is used for the voltage being used as data display benchmark to the input of display module;
Described reference voltage feedback signal line is used for the signal of the reference voltage of Real-time Feedback after display module outputting data signals to export away; Described device comprises:
Acquisition module, starts after input has desirable reference voltage signal, to gather the first signal that in first time period, described reference voltage feedback signal line exports for described reference voltage input port;
First adjusting module, for according to described first signal, adjusts the input signal of described reference voltage input port.
Preferably, described first adjusting module comprises:
Judging unit, for judging whether described first signal meets the waveform fitting condition preset, and obtains the first judged result;
Fitting unit, for when described first judged result is for being, according to the waveform fitting mode corresponding with described waveform fitting condition, carrying out waveform fitting to described first signal, obtaining the fitted signal after matching;
Determining unit, for according to described fitted signal, determine the parameter value of the echo signal arrived to be adjusted, wherein, described echo signal has identical type with described fitted signal;
Adjustment unit, for according to described parameter value, is adjusted to described echo signal by the input signal of described reference voltage input port.
Preferably, described waveform fitting condition is square wave fitting condition, described waveform fitting mode is square wave fit approach, described fitted signal is the first square-wave signal, described echo signal is the second square-wave signal, and described parameter value comprises the frequency of described second square-wave signal, amplitude, start-phase and start time point.
Preferably, the frequency of described second square-wave signal is the frequency of described first square-wave signal;
The amplitude of described second square-wave signal is the amplitude of described first square-wave signal;
The start time point of described second square-wave signal postpones first integral multiple in the cycle of described first square-wave signal than the end time point of described first square-wave signal;
When described second square-wave signal shifts to an earlier date second integral multiple in described cycle, described first square-wave signal with in advance after overlapping time of described second square-wave signal in section, the rising edge of described first square-wave signal with in advance after the negative edge of described second square-wave signal align, the second integer is greater than the first integer.
Preferably, also comprise:
Assessment module, for evaluating the level of residual image of display module when the input signal of described reference voltage input port is described second square-wave signal, obtains the first level of residual image assessed;
Judge module, for judging that whether described first level of residual image is lower than second level of residual image of display module when the input signal of described reference voltage input port is desirable reference voltage signal, obtains the second judged result;
Keeping module, for when described second judged result is for being, keeping described second square-wave signal;
Second adjusting module, for when described second judged result is no, adjusts the amplitude of described second square-wave signal, makes to show the level of residual image of module after described second square wave signal amplitude adjustment lower than described second level of residual image.
The embodiment of the present invention also provides a kind of method of adjustment of the video picture performance for showing module, display module is provided with reference voltage input port, and is connected with reference voltage feedback signal line, wherein:
Described reference voltage input port is used for the voltage being used as data display benchmark to the input of display module;
Described reference voltage feedback signal line is used for the signal of the reference voltage of Real-time Feedback after display module outputting data signals to export away;
Described method comprises:
Described reference voltage input port starts after input has desirable reference voltage signal, to gather the first signal that in first time period, described reference voltage feedback signal line exports;
According to described first signal, adjust the input signal of described reference voltage input port.
Preferably, described according to described first signal, the input signal adjusting described reference voltage input port comprises:
Judge whether described first signal meets the waveform fitting condition preset, and obtains the first judged result;
When described first judged result is for being, according to the waveform fitting mode corresponding with described waveform fitting condition, waveform fitting being carried out to described first signal, obtains the fitted signal after matching;
According to described fitted signal, determine the parameter value of the echo signal arrived to be adjusted, wherein, described echo signal has identical type with described fitted signal;
According to described parameter value, the input signal of described reference voltage input port is adjusted to described echo signal.
Preferably, described waveform fitting condition is square wave fitting condition, described waveform fitting mode is square wave fit approach, described fitted signal is the first square-wave signal, described echo signal is the second square-wave signal, and described parameter value comprises the frequency of described second square-wave signal, amplitude, start-phase and start time point.
Preferably, the frequency of described second square-wave signal is the frequency of described first square-wave signal;
The amplitude of described second square-wave signal is the amplitude of described first square-wave signal;
The start-phase of described second square-wave signal, be zero with described first square-wave signal in the phase place sum of very first time point, described very first time point is in described first time period, and described start time point is the positive integer times in the cycle of described first square-wave signal relative to the time delay that the described very first time puts.
Preferably, also comprise:
The level of residual image of display module when the input signal of described reference voltage input port is described second square-wave signal is evaluated, obtains the first level of residual image assessed;
Judge that whether described first level of residual image is lower than second level of residual image of display module when the input signal of described reference voltage input port is desirable reference voltage signal, obtains the second judged result;
When described second judged result is for being, keep described second square-wave signal;
When described second judged result is no, the amplitude of described second square-wave signal is adjusted, make to show the level of residual image of module after described second square wave signal amplitude adjustment lower than described second level of residual image.
As can be seen from the above, the embodiment of the present invention at least has following beneficial effect:
The input signal of described reference voltage input port is adjusted by the first signal starting to input described reference voltage feedback signal line output in a period of time after desirable reference voltage signal according to reference voltage input port, thus the adjustment achieved the voltage signal being input to reference voltage input port, also the deviation of reference voltage relative to desirable reference voltage of the reality of directly having an effect on a display screen is just changed, thus change positive and negative viewing area relative to Vcom symmetry situation, support the adjustment of the video picture performance of display module.
Accompanying drawing explanation
Fig. 1 represents the structural representation one of the adjusting gear of a kind of video picture performance that the embodiment of the present invention provides;
Fig. 2 represents the structural representation two of the adjusting gear of a kind of video picture performance that the embodiment of the present invention provides;
Fig. 3 represents the structural representation three of the adjusting gear of a kind of video picture performance that the embodiment of the present invention provides;
Fig. 4 represents that the shake Vcom of the better embodiment of the embodiment of the present invention exports fundamental block diagram;
Fig. 5 represents the circuit diagram for generating the signal being input to VCOMIN port of the better embodiment of the embodiment of the present invention;
Fig. 6 represents the Vcom feedback signal collected of the better embodiment of the embodiment of the present invention and the waveform schematic diagram of fitted signal (the first signal) thereof;
Fig. 7 represents the exemplary relationship figure between fitted signal in Fig. 6 and the square-wave signal (the second signal) being to be adjusted obtained accordingly;
Fig. 8 represents the flow chart of steps of the method for adjustment of a kind of video picture performance that the embodiment of the present invention provides.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawings and the specific embodiments the embodiment of the present invention is described in detail.
Fig. 1 represents the structural representation one of the adjusting gear of a kind of video picture performance that the embodiment of the present invention provides, with reference to Fig. 1, the embodiment of the present invention provides a kind of adjusting gear of video picture performance, and display module is provided with reference voltage input port, and be connected with reference voltage feedback signal line, wherein:
Described reference voltage input port, for being used as the voltage of data display benchmark to the input of display module;
Described reference voltage feedback signal line, for exporting away the signal of the reference voltage of Real-time Feedback after display module outputting data signals;
Described device comprises:
Acquisition module 101, starts after input has desirable reference voltage signal, to gather the first signal that in first time period, described reference voltage feedback signal line exports for described reference voltage input port;
First adjusting module 102, for according to described first signal, adjusts the input signal of described reference voltage input port.
Visible, the input signal of described reference voltage input port is adjusted by the first signal starting to input described reference voltage feedback signal line output in a period of time after desirable reference voltage signal according to reference voltage input port, thus the adjustment achieved the voltage signal being input to reference voltage input port, also the deviation of reference voltage relative to desirable reference voltage of the reality of directly having an effect on a display screen is just changed, thus change positive and negative viewing area relative to Vcom symmetry situation, support the adjustment of the video picture performance of display module.
Wherein, showing module is such as liquid crystal display.
With reference to Fig. 2, described first adjusting module 102 can comprise:
Judging unit 110, for judging whether described first signal meets the waveform fitting condition preset, and obtains the first judged result;
Fitting unit 120, for when described first judged result is for being, according to the waveform fitting mode corresponding with described waveform fitting condition, carrying out waveform fitting to described first signal, obtaining the fitted signal after matching;
Determining unit 130, for according to described fitted signal, determine the parameter value of the echo signal arrived to be adjusted, wherein, described echo signal has identical type with described fitted signal;
Adjustment unit 140, for according to described parameter value, is adjusted to described echo signal by the input signal of described reference voltage input port.
Particularly, after considering the long period after showing module has powered up, the amplitude of reference voltage can change relative to the amplitude of desirable reference voltage, and the fluctuation of the reference voltage of this change can for fitting to square-wave signal, in view of this, Ke Yiyou:
Described waveform fitting condition is square wave fitting condition, described waveform fitting mode is square wave fit approach, described fitted signal is the first square-wave signal, described echo signal is the second square-wave signal, and described parameter value comprises the frequency of described second square-wave signal, amplitude, start-phase and start time point.
Wherein, described second square-wave signal can by carrying out transforming realizing on original basis inputting the circuit of desirable reference voltage signal for described reference voltage input port of display module, particularly, consider that AVDD port is powered for this circuit, this circuit comprises dividing potential drop electronic circuit, this dividing potential drop electronic circuit has certain resistance value, by the dividing potential drop of this dividing potential drop electronic circuit, thus the voltage making this circuit be input to described reference voltage input port becomes desirable reference voltage, in view of this, then can transform this dividing potential drop electronic circuit, to make the resistance of this dividing potential drop electronic circuit adjustable, by the resistance of adjustment dividing potential drop electronic circuit, adjust the voltage that this dividing potential drop electronic circuit is shared, thus the amplitude making this circuit be input to the voltage of described reference voltage input port changes, by controlling the start time point of the voltage that this dividing potential drop electronic circuit of adjustment is shared, just can control the start time point that amplitude that this circuit is input to the voltage of described reference voltage input port changes, by controlling the frequency of the voltage that this dividing potential drop electronic circuit of adjustment is shared, just can control the frequency that amplitude that this circuit is input to the voltage of described reference voltage input port changes.And the second square-wave signal be adjusted to by the input signal of described reference voltage input port is initial with described start time point, then need to debug timing controller in the design to realize.
More specifically, in order to realize the improvement of video picture performance, Ke Yiyou:
The frequency of described second square-wave signal is the frequency of described first square-wave signal;
The amplitude of described second square-wave signal is the amplitude of described first square-wave signal;
The start time point of described second square-wave signal postpones first integral multiple in the cycle of described first square-wave signal than the end time point of described first square-wave signal;
When described second square-wave signal shifts to an earlier date second integral multiple in described cycle, described first square-wave signal with in advance after overlapping time of described second square-wave signal in section, the rising edge of described first square-wave signal with in advance after the negative edge of described second square-wave signal align, the second integer is greater than the first integer.
In addition, with reference to Fig. 3, in order to realize improving comparatively significantly of video picture performance, can also comprise:
Assessment module 111, for evaluating the level of residual image of display module when the input signal of described reference voltage input port is described second square-wave signal, obtains the first level of residual image assessed;
Judge module 112, for judging that whether described first level of residual image is lower than second level of residual image of display module when the input signal of described reference voltage input port is desirable reference voltage signal, obtains the second judged result;
Keeping module 113, for when described second judged result is for being, keeping described second square-wave signal;
Second adjusting module 114, for when described second judged result is no, adjusts the amplitude of described second square-wave signal, makes to show the level of residual image of module after described second square wave signal amplitude adjustment lower than described second level of residual image.Here, level of residual image can be divided multistage, and level of residual image is lower, and video picture performance is better.It will be understood by those skilled in the art that carrying out evaluation to level of residual image can adopt mode of the prior art to carry out, for saving length, not repeating them here.
For the embodiment of the present invention being set forth clearly clear, provide the better embodiment of the embodiment of the present invention below.
The design of this better embodiment relates generally to the research and development field in TFT-LCD production field.
Liquid crystal display is owing to certainly existing coupling capacitance in the design, because the existence of coupling capacitance causes the skew of Vcom in procedure for displaying, thus cause desirable Vcom and actual Vcom deviation to some extent, positive and negative viewing area presents asymmetry relative to Vcom, and during long time loading, pixilated upper electrodes can be caused to produce DC component.Thus cause image retention.
Liquid crystal display is owing to certainly existing stray capacitance in the design, due to the existence of stray capacitance in procedure for displaying, in practical work process, when the voltage that signal exports changes, the stray capacitance of voltage between Data line and pixel electrode etc. changes, simultaneously again because the coupling of electric capacity makes Vcom signal offset, and make the voltage on the electrode in pixel present asymmetry relative to Vcom, the signal voltage of such pixel electrode just creates DC component, if long time loading will cause image retention.
The theory that the design utilizes utilizes mimic channel and carrys out according to the Vcom that Vcom actual in liquid crystal display carrys out regulation output shake the Vcom skew that quasi-complement coupling capacitance brings, thus realize the improvement to image retention.
Fig. 4 represents that the shake Vcom of the better embodiment of the embodiment of the present invention exports fundamental block diagram, and with reference to Fig. 4, the output intent of shake Vcom comprises the steps:
Step 401, liquid crystal display initialization;
Step 402, sends common direct current signal to display by signal generator or voltage generation circuit etc.;
Step 403, Vcom feedback signal when Gather and input is conventional DC signal;
Particularly, reference voltage feedback signal is gathered at reference voltage feedback signal line.Wherein, the Feedback(feedback designed when this reference voltage feedback signal line is panel designs) end, concrete acquisition mode is for can gather by modes such as oscillographs.
Step 404, for the feedback signal gathered, analyzes its frequency, confirms the chip needed for the output of IC(square wave) adjust the square wave frequency exported;
Step 405, adjustment Vcom signal jitter exports;
Particularly, adjustment is input to the signal of reference voltage input port (i.e. VCOMIN port), and what reference voltage input port was inputted is no longer the voltage of definite value, but the voltage signal of generation amplitude jitter.Wherein, the amplitude of voltage signal shake can be carried out presetting according to the amplitude of feedback signal, then can adjust the amplitude that voltage signal is shaken according to the result of testing the level of residual image obtained, to reduce actual level of residual image as far as possible.
The output frequency of Vcom dither signal, the adjustment according to square-wave signal realizes, and jitter amplitude can the size of adjusting resistance value realize.
Step 406, terminates.
In circuit design process, after VcomFeedback signals collecting, adjustment exports IC square wave frequency and simple single-chip microcomputer can be utilized manually to export, and this Measures compare easily realizes.
Fig. 5 represents the circuit diagram for generating the signal being input to VCOMIN port of the better embodiment of the embodiment of the present invention, is an example of above-mentioned steps 205.With reference to Fig. 3, on the right side of Fig. 3, when the square-wave signal being input to metal-oxide-semiconductor T1 is in high level, T1 ends, and resistance R4 shares voltage, thus height when resistance value between VCOMIN port and ground is in low level than this square-wave signal.Therefore, when the square-wave signal being input to metal-oxide-semiconductor is in high level, the magnitude of voltage of input VCOMIN port, height when being in low level than this square-wave signal.Thus, be input to the level height of the square-wave signal of metal-oxide-semiconductor by adjustment, just correspondingly can adjust the height of the magnitude of voltage being input to VCOMIN port; And the frequency of the level height change of the square-wave signal of metal-oxide-semiconductor is input to by adjustment, just correspondingly can adjust the frequency of the magnitude of voltage height change being input to VCOMIN port.And make the magnitude of voltage height change being input to VCOMIN port, be in fact also just equivalent to have input square-wave signal to VCOMIN port.What this example adopted is fairly simple circuit, guarantee that the phase place of square-wave signal is accurate, by when design circuit, circuit sequence is adjusted, with realize in the embodiment of the present invention " start-phase of described second square-wave signal, with described first square-wave signal in the phase place sum of very first time point for zero; described very first time point is in described first time period, and described start time point is the positive integer times reference voltage input port in the cycle of described first square-wave signal relative to the time delay that the described very first time puts ".
Fig. 6 represents the Vcom feedback signal collected of the better embodiment of the embodiment of the present invention and the oscillogram of fitted signal (the first signal) thereof.Fig. 7 represents the exemplary relationship figure between fitted signal in Fig. 6 and the square-wave signal (the second signal) being to be adjusted obtained accordingly.Wherein, the first signal is identical with the frequency of the second signal, amplitude is identical; The start time point of the second signal postpones N number of signal period (signal period is here the cycle of the first signal), M such as 1,3 or 10 etc. relative to the end time point of the first signal; When the second signal shifts to an earlier date M signal period, (in figure, signal period is here the cycle of the first signal, M is greater than N, M in figure is N+2) time, the first signal with in advance after overlapping time of the second signal in section, the rising edge of the first signal with shift to an earlier date after the negative edge of the second signal align.It should be noted that, what provide in Fig. 7 is that the first signal is just in the situation of rising edge at its end time point, the first signal is not in the situation (as be in negative edge, be between rising edge or negative edge) of rising edge at its end time point, is fine yet.
After display module has powered up, the input of VCOMIN port keeps the state of desirable reference voltage, deviation is there is in the actual voltage being added in display screen relative to desirable reference voltage, after certain hour, stable Feedback signal can be collected, namely the signal of square wave fitting condition is met, by carrying out square wave matching to this signal, and the square-wave signal that matching obtains is analyzed, be defined as the frequency of the square-wave signal of described reference voltage input port input, amplitude, the parameter value such as start time point and start-phase, again according to the change of the dividing potential drop resistance of the circuit between these parameter value control VCOMIN port and ground, and then realize exporting to VCOMIN port the voltage signal possessing these parameter values.
Visible, this better embodiment also proposed and exports by the shake of Vcom the design concept eliminating image retention; The shake that the design's (namely controlling to export square-wave signal and the design of composition graphs 5 by IC) utilizes mimic channel to realize Vcom exports the Vcom skew that quasi-complement coupling capacitance is brought, thus realizes the improvement to image retention.
Fig. 8 represents the flow chart of steps of the method for adjustment of a kind of video picture performance that the embodiment of the present invention provides, with reference to Fig. 8, the embodiment of the present invention also provides a kind of method of adjustment of video picture performance, and display module is provided with reference voltage input port, and be connected with reference voltage feedback signal line, wherein:
Described reference voltage input port, for being used as the voltage of data display benchmark to the input of display module;
Described reference voltage feedback signal line, for exporting away the signal of the reference voltage of Real-time Feedback after display module outputting data signals;
Described method comprises the steps:
Step 901, described reference voltage input port starts after input has desirable reference voltage signal, to gather the first signal that in first time period, described reference voltage feedback signal line exports;
Step 902, according to described first signal, adjusts the input signal of described reference voltage input port.
Visible, the input signal of described reference voltage input port is adjusted by the first signal starting to input described reference voltage feedback signal line output in a period of time after desirable reference voltage signal according to reference voltage input port, thus the adjustment achieved the voltage signal being input to reference voltage input port, also the deviation of reference voltage relative to desirable reference voltage of the reality of directly having an effect on a display screen is just changed, thus change positive and negative viewing area relative to Vcom symmetry situation, support the adjustment of the video picture performance of display module.
Wherein, described according to described first signal, the input signal adjusting described reference voltage input port can comprise:
Judge whether described first signal meets the waveform fitting condition preset, and obtains the first judged result;
When described first judged result is for being, according to the waveform fitting mode corresponding with described waveform fitting condition, waveform fitting being carried out to described first signal, obtains the fitted signal after matching;
According to described fitted signal, determine the parameter value of the echo signal arrived to be adjusted, wherein, described echo signal has identical type with described fitted signal;
According to described parameter value, the input signal of described reference voltage input port is adjusted to described echo signal.
Particularly, described waveform fitting condition can be square wave fitting condition, described waveform fitting mode can be square wave fit approach, described fitted signal can be first party ripple signal, described echo signal can be second party ripple signal, and described parameter value can comprise the frequency of described second square-wave signal, amplitude, start-phase and start time point.
More specifically, Ke Yiyou:
The frequency of described second square-wave signal is the frequency of described first square-wave signal;
The amplitude of described second square-wave signal is the amplitude of described first square-wave signal;
Described second square-wave signal start time point postpone first integral multiple in cycle of described first square-wave signal than the end time point of described first square-wave signal;
When described second square-wave signal shifts to an earlier date second integral multiple in described cycle, described first square-wave signal with in advance after overlapping time of described second square-wave signal in section, the rising edge of described first square-wave signal with in advance after the negative edge of described second square-wave signal align, the second integer is greater than the first integer.
In addition, can also comprise:
The level of residual image of display module when the input signal of described reference voltage input port is described second square-wave signal is evaluated, obtains the first level of residual image assessed;
Judge that whether described first level of residual image is lower than second level of residual image of display module when the input signal of described reference voltage input port is desirable reference voltage signal, obtains the second judged result;
When described second judged result is for being, keep described second square-wave signal;
When described second judged result is no, the amplitude of described second square-wave signal is adjusted, make to show the level of residual image of module after described second square wave signal amplitude adjustment lower than described second level of residual image.
The above is only the embodiment of the embodiment of the present invention; should be understood that; for those skilled in the art; under the prerequisite not departing from embodiment of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as the protection domain of the embodiment of the present invention.
Claims (8)
1. for showing an adjusting gear for the video picture performance of module, it is characterized in that, described display module being provided with reference voltage input port, and being connected with reference voltage feedback signal line, wherein,
Described reference voltage input port is used for the voltage being used as data display benchmark to the input of display module;
Described reference voltage feedback signal line is used for the signal of the reference voltage of Real-time Feedback after display module outputting data signals to export away;
Described device comprises:
Acquisition module, starts after input has desirable reference voltage signal, to gather the first signal that in first time period, described reference voltage feedback signal line exports for described reference voltage input port;
First adjusting module, for according to described first signal, adjusts the input signal of described reference voltage input port
Described first adjusting module comprises:
Judging unit, for judging whether described first signal meets the waveform fitting condition preset, and obtains the first judged result;
Fitting unit, for when described first judged result is for being, according to the waveform fitting mode corresponding with described waveform fitting condition, carrying out waveform fitting to described first signal, obtaining the fitted signal after matching;
Determining unit, for according to described fitted signal, determine the parameter value of the echo signal arrived to be adjusted, wherein, described echo signal has identical type with described fitted signal;
Adjustment unit, for according to described parameter value, is adjusted to described echo signal by the input signal of described reference voltage input port.
2. device as claimed in claim 1, it is characterized in that, described waveform fitting condition is square wave fitting condition, described waveform fitting mode is square wave fit approach, described fitted signal is the first square-wave signal, described echo signal is the second square-wave signal, and described parameter value comprises the frequency of described second square-wave signal, amplitude, start-phase and start time point.
3. device as claimed in claim 2, it is characterized in that, the frequency of described second square-wave signal is the frequency of described first square-wave signal;
The amplitude of described second square-wave signal is the amplitude of described first square-wave signal;
The start time point of described second square-wave signal postpones first integral multiple in the cycle of described first square-wave signal than the end time point of described first square-wave signal;
When described second square-wave signal shifts to an earlier date second integral multiple in described cycle, described first square-wave signal with in advance after overlapping time of described second square-wave signal in section, the rising edge of described first square-wave signal with in advance after the negative edge of described second square-wave signal align, the second integer is greater than the first integer.
4. device as claimed in claim 2, is characterized in that, also comprise:
Assessment module, for evaluating the level of residual image of display module when the input signal of described reference voltage input port is described second square-wave signal, obtains the first level of residual image assessed;
Judge module, for judging that whether described first level of residual image is lower than second level of residual image of display module when the input signal of described reference voltage input port is desirable reference voltage signal, obtains the second judged result;
Keeping module, for when described second judged result is for being, keeping described second square-wave signal;
Second adjusting module, for when described second judged result is no, adjusts the amplitude of described second square-wave signal, makes to show the level of residual image of module after described second square wave signal amplitude adjustment lower than described second level of residual image.
5. for showing a method of adjustment for the video picture performance of module, it is characterized in that, described display module being provided with reference voltage input port, and being connected with reference voltage feedback signal line, wherein:
Described reference voltage input port is used for the voltage being used as data display benchmark to the input of display module;
Described reference voltage feedback signal line is used for the signal of the reference voltage of Real-time Feedback after display module outputting data signals to export away;
Described method comprises:
Described reference voltage input port starts after input has desirable reference voltage signal, to gather the first signal that in first time period, described reference voltage feedback signal line exports;
According to described first signal, adjust the input signal of described reference voltage input port;
Described according to described first signal, the input signal adjusting described reference voltage input port comprises:
Judge whether described first signal meets the waveform fitting condition preset, and obtains the first judged result;
When described first judged result is for being, according to the waveform fitting mode corresponding with described waveform fitting condition, waveform fitting being carried out to described first signal, obtains the fitted signal after matching;
According to described fitted signal, determine the parameter value of the echo signal arrived to be adjusted, wherein, described echo signal has identical type with described fitted signal;
According to described parameter value, the input signal of described reference voltage input port is adjusted to described echo signal.
6. method as claimed in claim 5, it is characterized in that, described waveform fitting condition is square wave fitting condition, described waveform fitting mode is square wave fit approach, described fitted signal is the first square-wave signal, described echo signal is the second square-wave signal, and described parameter value comprises the frequency of described second square-wave signal, amplitude, start-phase and start time point.
7. method as claimed in claim 6, it is characterized in that, the frequency of described second square-wave signal is the frequency of described first square-wave signal;
The amplitude of described second square-wave signal is the amplitude of described first square-wave signal;
The start time point of described second square-wave signal postpones first integral multiple in the cycle of described first square-wave signal than the end time point of described first square-wave signal;
When described second square-wave signal shifts to an earlier date second integral multiple in described cycle, described first square-wave signal with in advance after overlapping time of described second square-wave signal in section, the rising edge of described first square-wave signal with in advance after the negative edge of described second square-wave signal align, the second integer is greater than the first integer.
8. method as claimed in claim 7, is characterized in that, also comprise:
The level of residual image of display module when the input signal of described reference voltage input port is described second square-wave signal is evaluated, obtains the first level of residual image assessed;
Judge that whether described first level of residual image is lower than second level of residual image of display module when the input signal of described reference voltage input port is desirable reference voltage signal, obtains the second judged result;
When described second judged result is for being, keep described second square-wave signal;
When described second judged result is no, the amplitude of described second square-wave signal is adjusted, make to show the level of residual image of module after described second square wave signal amplitude adjustment lower than described second level of residual image.
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| CN106023877B (en) * | 2016-08-15 | 2019-02-19 | 京东方科技集团股份有限公司 | Common electrical voltage regulator circuit, method, display panel and device |
| CN109949757B (en) * | 2017-12-21 | 2022-03-11 | 咸阳彩虹光电科技有限公司 | Scanning signal compensation method, scanning signal compensation circuit and display |
| CN109272953B (en) * | 2018-10-30 | 2020-07-10 | 惠科股份有限公司 | Signal adjusting circuit and method and display device |
| CN109712581B (en) | 2019-01-02 | 2021-01-29 | 京东方科技集团股份有限公司 | Common voltage compensation circuit, display driver and display device |
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