CN105096784A - Detection circuit and detection method, display panel and control method and display device - Google Patents
Detection circuit and detection method, display panel and control method and display device Download PDFInfo
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Abstract
The invention discloses a common voltage feedback signal detection circuit and detection method, a display panel and a control method and a display device. The common voltage feedback signal detection circuit comprises a comparison module, a counting module and a control module. Occurrence of adverse phenomena of suffusing of green light and crosstalk in display pictures can be confirmed by comparison and analysis of common voltage feedback signals in the display panel and the preset upper and lower limits through the comparison module and recording of the number of times of exceeding of the preset upper and lower limits of fluctuation of common voltage signals in one frame of display picture through the counting module. When the adverse phenomena are confirmed, a control signal for controlling pixels to perform polarity reversing is outputted by the control module so that the output model of polar signals inputted to each pixel can be changed by controlling the display panel, and the adverse phenomena of the display panel caused by sharp fluctuation of the common voltage signals can be solved or improved.
Description
Technical field
The present invention relates to display technique field, espespecially a kind of common electric voltage feedback signal testing circuit and detection method, display panel and control method, display device.
Background technology
At present, when existing display panels shows different pictures, the degree of coupling of the public voltage signal in display panel is different, when namely showing different pictures, the fluctuating range of public voltage signal is different, general display panel is when showing some special pattern, because public voltage signal fluctuating range is large especially, as illustrated in figs. ia and ib, when common electric voltage feedback signal produce as shown in Figure 1a spiking time, the voltage signal change that data line is input to each pixel is same direction, public voltage signal is caused to fluctuate in the same way, now blue pixel and red pixel are partially dark, green pixel is partially bright, make the general green glow of display frame, when common electric voltage feedback signal produces fluctuation signal as shown in Figure 1 b, show that public voltage signal fluctuation is violent, picture entirety is partially dark, display frame then can be caused to occur the situation of crosstalk, above-mentioned two kinds of bad phenomenon have impact on the quality of display frame, but different product sizes, product type or dot structure, cause the general green glow of display frame, the firing patterns of crosstalk is different, solve or ameliorative way also different, wherein a kind of solution adopts the control chip increasing and have display frame measuring ability, the general green glow of display frame is triggered when control chip detects, during the pattern of crosstalk, the signal polarity inversion mode of each pixel is input to by change, solve or improve bad phenomenon.
Because the bad firing patterns of different product is different, therefore the method needs to invite control chip manufacturers design for the proprietary control chip of every a product, and be difficult to predict the pattern triggering this bad phenomenon at new product detection-phase, the design specification of control chip cannot be provided in advance, therefore, this ameliorative way has certain limitation, pass through the general green glow of display frame, the bad phenomenon of crosstalk is analyzed known, it is all because the dot structure of display panel is under specific reversal of poles mode, some display frame can cause common electric voltage big ups and downs, and then make pixel charging produce deviation and cause the generation of bad phenomenon.
Therefore, the how fluctuation situation of public voltage signal on detection display panel, control break is input to the reversal of poles mode of the signal of each pixel, thus improve the bad phenomenon such as the general green glow of display frame, crosstalk that display panel occurs when display frame, be those skilled in the art's technical matterss urgently to be resolved hurrily.
Summary of the invention
Embodiments provide a kind of common electric voltage feedback signal testing circuit and detection method, display panel and control method and display device, in order to the fluctuation situation of public voltage signal on detection display panel, control break is input to the reversal of poles mode of the signal of each pixel, thus improves the bad phenomenon such as the general green glow of display frame, crosstalk that display panel occurs when display frame.
Embodiments provide a kind of common electric voltage feedback signal testing circuit, comprising: comparison module, counting module and control module; Wherein,
First reference signal end of described comparison module is for inputting the first reference signal, second reference signal end is for inputting the second reference signal, input end is for inputting common electric voltage feedback signal, output terminal is connected with the first input end of described counting module, described comparison module is for determining whether the magnitude of voltage of described common electric voltage feedback signal exceedes the range of voltage values of described first reference signal and described second reference signal restriction, and when the magnitude of voltage of described common electric voltage feedback signal exceedes the range of voltage values of described first reference signal and described second reference signal restriction, export the first input end of the first level signal to described counting module, otherwise, export the first input end of second electrical level signal to described counting module,
Second input end of described counting module is connected with the frame start signal end of described control module, 3rd input end is connected with the start of line signal end of described control module, output terminal is connected with the input end of described control module, described counting module is used under the control of described start of line signal end, count when receiving described first level signal, and when stored count number of times is not less than default value in a frame time, export the input end of reverse control signal to described control module; Described counting module does not count when receiving described second electrical level signal;
The frame start signal end of described control module is used for described counting module incoming frame start signal, start of line signal end is used for described counting module input clock signal, described control module is used for when receiving described reverse control signal, exports and controls the control signal that pixel carries out reversal of poles.
In a kind of possible embodiment, in the above-mentioned common electric voltage feedback signal testing circuit that the embodiment of the present invention provides, described comparison module, specifically comprises: dual-threshold voltage comparator and protective resistance;
First negative input of described dual-threshold voltage comparator is for inputting described first reference signal; first normal phase input end is connected with the second negative input and for inputting described common electric voltage feedback signal; second normal phase input end is for inputting described second reference signal; first control end is connected with reference signal end one end with described protective resistance respectively; second control end is connected with ground level signal end, and output terminal is connected with the first input end of described counting module with the other end of described protective resistance respectively.
In a kind of possible embodiment, in the above-mentioned common electric voltage feedback signal testing circuit that the embodiment of the present invention provides, described counting module, specifically comprises: counter;
The input end of described counter is connected with the output terminal of described comparison module, clock signal terminal is connected with the start of line signal end of described control module, reset signal end is connected with the frame start signal end of described control module, and output terminal is connected with the input end of described control module.
In a kind of possible embodiment, in the above-mentioned common electric voltage feedback signal testing circuit that the embodiment of the present invention provides, also comprise: the first reference signal generation module and the second reference signal generation module; Wherein
Described first reference signal generation module for generating described first reference signal, and outputs to the first reference signal end of described comparison module;
Described second reference signal generation module for generating described second reference signal, and outputs to the second reference signal end of described comparison module.
In a kind of possible embodiment, in the above-mentioned common electric voltage feedback signal testing circuit that the embodiment of the present invention provides, described first reference signal generation module, specifically comprises: the first comparer, the second comparer, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance and the 8th resistance; Wherein,
The normal phase input end of described first comparer is connected with one end of described first resistance, and negative input is connected with one end of described second resistance, and output terminal is connected with one end of described 5th resistance with the other end of described first resistance respectively;
The other end of described second resistance is connected with one end of described 4th resistance with one end of described 3rd resistance respectively;
The other end of described 3rd resistance is connected with described reference signal end;
The other end of described 4th resistance is connected with described ground level signal end;
The normal phase input end of described second comparer is connected with one end of described 8th resistance with one end of described 6th resistance respectively, negative input is connected with one end of described 7th resistance with the other end of described 5th resistance respectively, and output terminal is connected with the first reference signal end of described comparison module with the other end of described 7th resistance respectively;
The other end of described 6th resistance is connected with public voltage signal end;
The other end of described 8th resistance is connected with described ground level signal end.
In a kind of possible embodiment, in the above-mentioned common electric voltage feedback signal testing circuit that the embodiment of the present invention provides, described second reference signal generation module, specifically comprises: the 3rd comparer, the 4th comparer, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance, the 14 resistance, the 15 resistance, the 16 resistance and the 17 resistance; Wherein,
The normal phase input end of described 3rd comparer is connected with one end of described 9th resistance, and negative input is connected with one end of described tenth resistance, and output terminal is connected with one end of described 15 resistance with the other end of described 9th resistance respectively;
The other end of described tenth resistance is connected with one end of described 12 resistance with one end of described 11 resistance respectively;
The other end of described 11 resistance is connected with described reference signal end;
The other end of described 12 resistance is connected with described ground level signal end;
The normal phase input end of described 4th comparer is connected with one end of described 16 resistance with one end of described 14 resistance, the other end of described 15 resistance respectively, negative input is connected with one end of described 17 resistance with the other end of described 13 resistance respectively, and output terminal is connected with the second reference signal end of described comparison module with the other end of described 17 resistance respectively;
The other end of described 13 resistance is connected with described ground level signal end;
The other end of described 14 resistance is connected with described public voltage signal end;
The other end of described 16 resistance is connected with described ground level signal end.
Embodiments provide a kind of display panel, comprise the above-mentioned common electric voltage feedback signal testing circuit that source driving chip and the embodiment of the present invention provide;
Described common electric voltage feedback signal testing circuit carries out the control signal of reversal of poles to described source driving chip for exporting control pixel;
Described source driving chip is used for when receiving described control signal, reversion present frame and next frame are input to the polarity of the signal of even rows, or with two row pixels be one group to the identical signal of two row pixels input polarity often organized in present frame and next frame, and the pixel of adjacent sets inputs opposite polarity signal.
Embodiments provide a kind of display device, comprise the above-mentioned display panel that the embodiment of the present invention provides.
Embodiments provide a kind of detection method of common electric voltage feedback signal, comprising:
Determine whether the magnitude of voltage of described common electric voltage feedback signal exceedes the range of voltage values of described first reference signal and described second reference signal restriction, when the magnitude of voltage of described common electric voltage feedback signal exceedes the range of voltage values of described first reference signal and described second reference signal restriction, export the first input end of the first level signal to described counting module, otherwise, export the first input end of second electrical level signal to described counting module;
Count when receiving described first level signal, and when stored count number of times is not less than default value in a frame time, export reverse control signal;
When receiving described reverse control signal, exporting and controlling the control signal that pixel carries out reversal of poles.
Embodiments provide a kind of control method of display panel, comprising:
When receiving control pixel and carrying out the control letter of reversal of poles, reversion present frame and next frame are input to the polarity of the signal of even rows, or with two row pixels be one group to the identical signal of two row pixels input polarity often organized in present frame and next frame, and the pixel of adjacent sets inputs opposite polarity signal;
Determine reverse after described when the next frame time receives described control signal again, reversion present frame and next frame are input to the polarity of the signal of even rows again, or with two row pixels be one group to the identical signal of two row pixels input polarity often organized in present frame and next frame, and the pixel of adjacent sets inputs opposite polarity signal, otherwise the signal polarity being input to each pixel from next frame returns to the initialize signal that adjacent lines and adjacent column are contrary.
The beneficial effect of the embodiment of the present invention comprises:
Embodiments provide a kind of common electric voltage feedback signal testing circuit and detection method, display panel and control method and display device, this common electric voltage feedback signal testing circuit comprises comparison module, counting module and control module, wherein, comparison module is for determining the range of voltage values whether magnitude of voltage of common electric voltage feedback signal limits more than the first reference signal and the second reference signal, and when the range of voltage values that the magnitude of voltage of common electric voltage feedback signal limits more than the first reference signal and the second reference signal, export the first input end of the first level signal to counting module, otherwise, export the first input end of second electrical level signal to counting module, counting module is used for counting when receiving the first level signal, and when stored count number of times is not less than default value in a frame time, exports the input end of reverse control signal to control module, control module is used for when receiving reverse control signal, export and control the control signal that pixel carries out reversal of poles, like this by comparison module comparing and analysis common electric voltage feedback signal in display panel and default upper lower limit value, and the number of times of default upper lower limit value is exceeded by the fluctuation that counting module is recorded in public voltage signal in a frame display frame, determine the general green glow of display frame, the generation of the bad phenomenon such as crosstalk, when determining to occur bad phenomenon, exported by control module and control the control signal that pixel carries out reversal of poles, thus the way of output that display panel change is input to the polar signal of each pixel can be controlled, solve or improve the bad phenomenon that display panel causes due to public voltage signal big ups and downs.
Accompanying drawing explanation
The fluctuation schematic diagram of common electric voltage feedback signal when Fig. 1 a is the general green glow of display frame in prior art;
The fluctuation schematic diagram of common electric voltage feedback signal when Fig. 1 b is display frame generation crosstalk in prior art;
The common electric voltage feedback signal testing circuit structural representation that Fig. 2 provides for the embodiment of the present invention;
The concrete structure schematic diagram of the common electric voltage feedback signal testing circuit that Fig. 3 provides for the embodiment of the present invention;
The structural representation of the first reference signal generation module that Fig. 4 provides for the embodiment of the present invention;
The structural representation of the second reference signal generation module that Fig. 5 provides for the embodiment of the present invention;
Fig. 6 a-Fig. 6 c is respectively the signal polarity schematic diagram being input to pixel that the embodiment of the present invention provides;
The detection method process flow diagram of the common electric voltage feedback signal testing circuit that Fig. 7 provides for the embodiment of the present invention;
The control method process flow diagram of the display panel that Fig. 8 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the common electric voltage feedback signal testing circuit provide the embodiment of the present invention and the embodiment of detection method, display panel and control method and display device are described in detail.
Embodiments provide a kind of common electric voltage feedback signal testing circuit, as shown in Figure 2, can comprise: comparison module 1, counting module 2 and control module 3; Wherein,
First reference signal end of comparison module 1 is for inputting the first reference signal U1, second reference signal end is for inputting the second reference signal U2, input end is for inputting common electric voltage feedback signal F, output terminal is connected with the first input end of counting module 2, comparison module 1 is for determining the range of voltage values whether magnitude of voltage of common electric voltage feedback signal F limits more than the first reference signal U1 and the second reference signal U2, and when the range of voltage values that the magnitude of voltage of common electric voltage feedback signal F limits more than the first reference signal U1 and the second reference signal U2, export the first input end of the first level signal to counting module 2, otherwise, export the first input end of second electrical level signal to counting module 2,
Second input end of counting module 2 is connected with the frame start signal end STV of control module 3,3rd input end is connected with the start of line signal end TP of control module, output terminal is connected with the input end of control module 3, under the control of counting module 2 for the start signal end TP that is expert at, count when receiving the first level signal, and when stored count number of times is not less than default value in a frame time, export the input end of reverse control signal to control module 3; Counting module 2 does not count when receiving second electrical level signal;
The frame start signal end STV of control module 3 is used for counting module 2 incoming frame start signal, start of line signal end TP is used for counting module 2 input clock signal, control module 3, for when receiving reverse control signal, exporting and controlling the control signal that pixel carries out reversal of poles.
In the above-mentioned common electric voltage feedback signal testing circuit that the embodiment of the present invention provides, comparison module 1 is for determining the range of voltage values whether magnitude of voltage of common electric voltage feedback signal F limits more than the first reference signal U1 and the second reference signal U2, and when the range of voltage values that the magnitude of voltage of common electric voltage feedback signal F limits more than the first reference signal U1 and the second reference signal U2, export the first input end of the first level signal to counting module 2, otherwise, export the first input end of second electrical level signal to counting module 2, counting module 2 for counting when receiving the first level signal, and when stored count number of times is not less than default value in a frame time, exports the input end of reverse control signal to control module 3, control module 3 is for when receiving reverse control signal, export and control the control signal that pixel carries out reversal of poles, like this by comparison module comparing and analysis common electric voltage feedback signal in display panel and default upper lower limit value, and the number of times of default upper lower limit value is exceeded by the fluctuation that counting module is recorded in public voltage signal in a frame display frame, determine the general green glow of display frame, the generation of the bad phenomenon such as crosstalk, when determining to occur bad phenomenon, exported by control module and control the control signal that pixel carries out reversal of poles, thus the way of output that display panel change is input to the polar signal of each pixel can be controlled, solve or improve the bad phenomenon that display panel causes due to public voltage signal big ups and downs.
In the specific implementation, in the above-mentioned common electric voltage feedback signal testing circuit that the embodiment of the present invention provides, as shown in Figure 3, comparison module can specifically comprise: dual-threshold voltage comparator Q and protective resistance Rb, first negative input of dual-threshold voltage comparator Q is for inputting the first reference signal U1, first normal phase input end is connected with the second negative input and for inputting common electric voltage feedback signal F, second normal phase input end is for inputting the second reference signal U2, first control end is connected with one end of protective resistance Rb with reference signal end Vcc respectively, second control end is connected with ground level signal end GND, output terminal is connected with the first input end of counting module 2 with the other end of protective resistance Rb respectively, particularly, in the above-mentioned common electric voltage feedback signal testing circuit that the embodiment of the present invention provides, common electric voltage feedback signal F is accessed dual-threshold voltage comparator Q, and then compare with the first reference signal U1 and the second reference signal U2, wherein the first reference signal U1 and the second reference signal U2 is the upper lower limit value that default public voltage signal can fluctuate, determine the numerical range whether common electric voltage feedback signal limits more than the first reference signal U1 and the second reference signal U2, namely determine whether the fluctuation of public voltage signal exceedes preset range, when determining that the fluctuation of public voltage signal exceedes preset range, export corresponding signal to counting module, the number of times of preset range is exceeded by the fluctuation of counting module accumulative public voltage signal in a frame time, thus determine whether because the fluctuation of public voltage signal causes the general green glow of display frame, the bad phenomenon such as crosstalk
In the specific implementation, in the above-mentioned common electric voltage feedback signal testing circuit that the embodiment of the present invention provides, as shown in Figure 3, counting module can specifically comprise: counter J, the input end of counter J is connected with the output terminal of comparison module 1, clock signal terminal CLK is connected with the start of line signal end TP of control module 3, reset signal end CLR is connected with the frame start signal end STV of control module 3, output terminal is connected with the input end of control module 3, particularly, in the above-mentioned common electric voltage feedback signal testing circuit that the embodiment of the present invention provides, counter J then counts once when receiving comparison module 1 and exporting ground the first level signal, display panel is in the process of lining by line scan, each line scanning process Counter J counts once at the most, namely in every line scanning process, no matter public voltage signal fluctuation occurs exceeding preset range several times, counter J only counts once, after each frame scan terminates, counter J resets once, within the sweep time of a frame, when counter J counts is not less than default value, show that the fluctuation due to public voltage signal causes bad phenomenon, this hour counter J exports the input end of reverse control signal to control module 3, control module 3 is when receiving reverse control signal, export and control the control signal that pixel carries out reversal of poles, thus the way of output that display panel change is input to the polar signal of each pixel can be controlled, solve or improve the bad phenomenon that display panel causes due to public voltage signal big ups and downs.
In the specific implementation, in the above-mentioned common electric voltage feedback signal testing circuit that the embodiment of the present invention provides, in order to determine whether the fluctuation of public voltage signal causes the generation of bad phenomenon, therefore the upper lower limit value that the first reference signal and the second reference signal fluctuate as public voltage signal is set, wherein, first reference signal and the second reference signal can for presetting fixed voltage value, and the magnitude of voltage of the first reference signal is less than the magnitude of voltage of the second reference signal, namely the first reference signal is the minimum amount of voltage that public voltage signal can fluctuate, second reference signal is the maximum voltage value that public voltage signal can fluctuate, when the magnitude of voltage of common electric voltage feedback signal is more than the first reference signal or the second reference signal, illustrate that public voltage signal fluctuation exceedes default normal range, in one vertical interval, the number of times that public voltage signal fluctuation exceedes preset range reaches default value, can determine that the fluctuation due to public voltage signal causes bad phenomenon.
In the specific implementation, in the above-mentioned common electric voltage feedback signal testing circuit that the embodiment of the present invention provides, in order to determine whether the fluctuation of public voltage signal causes the generation of bad phenomenon, therefore the upper lower limit value that the first reference signal and the second reference signal fluctuate as public voltage signal is set, wherein, the first fixing pressure reduction can be had between first reference signal and common electric voltage feedback signal, the second fixing pressure reduction can be had between second reference signal and common electric voltage feedback signal, the magnitude of voltage of the first reference signal is less than the magnitude of voltage of the second reference signal, namely the first reference signal and the second reference signal can be arranged to the magnitude of voltage can following public voltage signal adjustment, when the above-mentioned common electric voltage feedback signal testing circuit embodiment of the present invention provided is applied to the product of different size type, public voltage signal is in order to satisfy the demands, may need to adjust, the first reference signal now set and between the second reference signal and common electric voltage feedback signal, there is fixing pressure reduction, therefore can the magnitude of voltage of synchronous adjustment first reference signal and the second reference signal, be conducive to the broad applicability improving common electric voltage feedback signal testing circuit.
In the specific implementation, in the above-mentioned common electric voltage feedback signal testing circuit that the embodiment of the present invention provides, first fixing pressure reduction is equal with the second fixing pressure reduction, the upper lower limit value that first reference signal and the second reference signal can fluctuate as public voltage signal, can and common electric voltage feedback signal between there is fixing pressure reduction, wherein have between the first reference signal and common electric voltage feedback signal first fixing pressure reduction, can be equal with the have between the second reference signal and common electric voltage feedback signal second fixing pressure reduction, the scope that public voltage signal can fluctuate can be limited in a more uniform numerical range like this, when public voltage signal adjusts, be conducive to adjustment first reference signal and the second reference signal.
In the specific implementation, in the above-mentioned common electric voltage feedback signal testing circuit that the embodiment of the present invention provides, can also comprise: the first reference signal generation module and the second reference signal generation module; Wherein the first reference signal generation module is for generating the first reference signal, and outputs to the first reference signal end of comparison module; Second reference signal generation module is for generating the second reference signal, and output to the second reference signal end of comparison module, particularly, in order to meet the first reference signal and the second reference signal can with public voltage signal synchronous adjustment, therefore first reference signal generation module and the second reference signal generation module are set, for generating the first reference signal and the second reference signal, and be input to the corresponding input end of comparison module respectively, as the upper lower limit value that public voltage signal can fluctuate, determine whether public voltage signal fluctuation exceedes default value.
In the specific implementation, in the above-mentioned common electric voltage feedback signal testing circuit that the embodiment of the present invention provides, as shown in Figure 4, the first reference signal generation module can specifically comprise: the first comparer B1, the second comparer B2, the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7 and the 8th resistance R8, wherein, the normal phase input end of the first comparer B1 is connected with one end of the first resistance R1, and negative input is connected with one end of the second resistance R2, and output terminal is connected with one end of the 5th resistance R5 with the other end of the first resistance R1 respectively, the other end of the second resistance R2 is connected with one end of the 4th resistance R4 with one end of the 3rd resistance R3 respectively, the other end of the 3rd resistance R3 is connected with reference signal end Vss, the other end of the 4th resistance R4 is connected with ground level signal end GND, the normal phase input end of the second comparer B2 is connected with one end of the 8th resistance R8 with one end of the 6th resistance R6 respectively, negative input is connected with one end of the 7th resistance R7 with the other end of the 5th resistance R5 respectively, and output terminal is connected with the first reference signal end of comparison module with the other end of the 7th resistance R7 respectively, the other end of the 6th resistance R6 is connected with public voltage signal end Vcom, the other end of the 8th resistance R8 is connected with ground level signal end GND, particularly, in the above-mentioned common electric voltage feedback signal testing circuit that the embodiment of the present invention provides, the magnitude of voltage that first reference signal generation module Reference Signal end Vcc inputs, through the dividing potential drop of the 3rd resistance R3 and the 4th resistance R4, and by the first resistance R1, the adder circuit that second resistance R2 and the first comparer B1 forms, by the second comparer B2, 5th resistance R5, 6th resistance R6, the subtraction circuit that 7th resistance R7 and the 8th resistance R8 forms, form the first reference signal, the fixing pressure reduction had between first reference signal and common electric voltage feedback signal, can adjust accordingly with the adjustment of public voltage signal.
In the specific implementation, in the above-mentioned common electric voltage feedback signal testing circuit that the embodiment of the present invention provides, as shown in Figure 5, the second reference signal generation module can specifically comprise: the 3rd comparer B3, the 4th comparer B4, the 9th resistance R9, the tenth resistance R10, the 11 resistance R11, the 12 resistance R12, the 13 resistance R13, the 14 resistance R14, the 15 resistance R15, the 16 resistance R16 and the 17 resistance R17, wherein, the normal phase input end of the 3rd comparer B3 is connected with one end of the 9th resistance R9, and negative input is connected with one end of the tenth resistance R10, and output terminal is connected with one end of the 15 resistance R15 with the other end of the 9th resistance R9 respectively, the other end of the tenth resistance R10 is connected with one end of the 12 resistance R12 with one end of the 11 resistance R11 respectively, the other end of the 11 resistance R11 is connected with reference signal end Vcc, the other end of the 12 resistance R12 is connected with ground level signal end GND, the normal phase input end of the 4th comparer B4 is connected with one end of the 16 resistance R16 with one end of the 14 resistance R14, the other end of the 15 resistance R15 respectively, negative input is connected with one end of the 17 resistance R17 with the other end of the 13 resistance R13 respectively, and output terminal is connected with the second reference signal end of comparison module with the other end of the 17 resistance R17 respectively, the other end of the 13 resistance R13 is connected with ground level signal end GND, the other end of the 14 resistance R14 is connected with public voltage signal end Vcom, the other end of the 16 resistance R16 is connected with ground level signal end GND, particularly, in the above-mentioned common electric voltage feedback signal testing circuit that the embodiment of the present invention provides, the magnitude of voltage that second reference signal generation module Reference Signal end Vcc inputs, through the dividing potential drop of the 11 resistance R11 and the 12 resistance R12, and by the 9th resistance R9, the adder circuit that tenth resistance R10 and the 3rd comparer B3 forms, by the 4th comparer B4, 13 resistance R13, 14 resistance R14, 15 resistance R15, the subtraction circuit that 16 resistance R16 and the 17 resistance R17 forms, form the second reference signal, the fixing pressure reduction had between second reference signal and common electric voltage feedback signal, can adjust accordingly with the adjustment of public voltage signal.
Based on same inventive concept, embodiments provide a kind of display panel, comprise the above-mentioned common electric voltage feedback signal testing circuit that source driving chip and the embodiment of the present invention provide, common electric voltage feedback signal testing circuit carries out the control signal of reversal of poles to source driving chip for exporting control pixel, source driving chip is used for when receiving control signal, reversion present frame and next frame are input to the polarity of the signal of even rows, or with two row pixels be one group to the identical signal of two row pixels input polarity often organized in present frame and next frame, and the pixel of adjacent sets inputs opposite polarity signal, particularly, when determining to occur bad phenomenon, common electric voltage feedback signal testing circuit exports control pixel and carries out the control signal of reversal of poles to source driving chip, source driving chip changes the way of output of the polar signal being input to each pixel when receiving control signal, namely such as, initial input to each pixel signal as shown in Figure 6 a, can reverse as shown in Figure 6 b present frame and next frame is input to the polarity of the signal of even rows, or as fig. 6 c with two row pixels be one group to the identical signal of two row pixels input polarity often organized in present frame and next frame, and the pixel of adjacent sets inputs opposite polarity signal, thus can solve or improve the bad phenomenon that display panel causes due to public voltage signal big ups and downs.
Based on same inventive concept, embodiments provide a kind of display device, comprise the above-mentioned display panel that the embodiment of the present invention provides.This display device can be applied to any product or parts with Presentation Function such as mobile phone, panel computer, televisor, display, notebook computer, digital album (digital photo frame), navigating instrument.The principle of dealing with problems due to this display device is similar to above-mentioned display panel, and therefore the enforcement of this display device see the enforcement of above-mentioned display panel, can repeat part and repeat no more.
Based on same inventive concept, embodiments provide a kind of detection method of common electric voltage feedback signal, as shown in Figure 7, can specifically comprise the following steps:
S101, determine that the magnitude of voltage of common electric voltage feedback signal is whether more than the range of voltage values that the first reference signal and the second reference signal limit, when the range of voltage values that the magnitude of voltage of common electric voltage feedback signal limits more than the first reference signal and the second reference signal, export the first input end of the first level signal to counting module, otherwise, export the first input end of second electrical level signal to counting module;
S102, to count when receiving the first level signal, and when stored count number of times is not less than default value in a frame time, export reverse control signal;
S103, when receiving reverse control signal, exporting and controlling pixel and carry out the control signal of reversal of poles.
In the above-mentioned common electric voltage feedback signal detection method that the embodiment of the present invention provides, by comparing and analysis common electric voltage feedback signal in display panel and default upper lower limit value, and the fluctuation being recorded in public voltage signal in a frame display frame exceedes the number of times of default upper lower limit value, determine the general green glow of display frame, the generation of the bad phenomenon such as crosstalk, when determining to occur bad phenomenon, export and control the control signal that pixel carries out reversal of poles, thus the way of output that display panel change is input to the polar signal of each pixel can be controlled, solve or improve the bad phenomenon that display panel causes due to public voltage signal big ups and downs.
Based on same inventive concept, embodiments provide a kind of control method of display panel, as shown in Figure 8, specifically can comprise the following steps:
S201, receive control pixel carry out reversal of poles control letter time, reversion present frame and next frame are input to the polarity of the signal of even rows, or with two row pixels be one group to the identical signal of two row pixels input polarity often organized in present frame and next frame, and the pixel of adjacent sets inputs opposite polarity signal;
S202, determine that the next frame after reversing is when again receiving described control signal, reversion present frame and next frame are input to the polarity of the signal of even rows again, or with two row pixels be one group to the identical signal of two row pixels input polarity often organized in present frame and next frame, and the pixel of adjacent sets inputs opposite polarity signal, otherwise the signal polarity being input to each pixel from next frame returns to the initialize signal that adjacent lines and adjacent column are contrary.
In the control method of the above-mentioned display panel that the embodiment of the present invention provides, when determining to cause bad phenomenon to occur due to public voltage signal fluctuation, change present frame and next frame output to the polar signal of each pixel, namely reversion present frame and next frame are input to the polarity of the signal of even rows, or with two row pixels be one group to the identical signal of two row pixels input polarity often organized in present frame and next frame, and the pixel of adjacent sets inputs opposite polarity signal, after next frame continues to detect the change reversal of poles way of output, whether still exist because public voltage signal fluctuates the bad phenomenon caused, if have, above-mentioned two kinds are then adopted to shift gears, be different from previous shifting gears to change, otherwise, the polar signal outputting to each pixel from next frame returns to initialize signal, can solve or improve the bad phenomenon that display panel causes due to public voltage signal big ups and downs like this.
Embodiments provide a kind of common electric voltage feedback signal testing circuit and detection method, display panel and control method and display device, this common electric voltage feedback signal testing circuit comprises comparison module, counting module and control module, wherein, comparison module is for determining the range of voltage values whether magnitude of voltage of common electric voltage feedback signal limits more than the first reference signal and the second reference signal, and when the range of voltage values that the magnitude of voltage of common electric voltage feedback signal limits more than the first reference signal and the second reference signal, export the first input end of the first level signal to counting module, otherwise, export the first input end of second electrical level signal to counting module, counting module is used for counting when receiving the first level signal, and when stored count number of times is not less than default value in a frame time, exports the input end of reverse control signal to control module, control module is used for when receiving reverse control signal, export and control the control signal that pixel carries out reversal of poles, like this by comparison module comparing and analysis common electric voltage feedback signal in display panel and default upper lower limit value, and the number of times of default upper lower limit value is exceeded by the fluctuation that counting module is recorded in public voltage signal in a frame display frame, determine the general green glow of display frame, the generation of the bad phenomenon such as crosstalk, when determining to occur bad phenomenon, exported by control module and control the control signal that pixel carries out reversal of poles, thus the way of output that display panel change is input to the polar signal of each pixel can be controlled, solve or improve the bad phenomenon that display panel causes due to public voltage signal big ups and downs.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a common electric voltage feedback signal testing circuit, is characterized in that, comprising: comparison module, counting module and control module; Wherein,
First reference signal end of described comparison module is for inputting the first reference signal, second reference signal end is for inputting the second reference signal, input end is for inputting common electric voltage feedback signal, output terminal is connected with the first input end of described counting module, described comparison module is for determining whether the magnitude of voltage of described common electric voltage feedback signal exceedes the range of voltage values of described first reference signal and described second reference signal restriction, and when the magnitude of voltage of described common electric voltage feedback signal exceedes the range of voltage values of described first reference signal and described second reference signal restriction, export the first input end of the first level signal to described counting module, otherwise, export the first input end of second electrical level signal to described counting module,
Second input end of described counting module is connected with the frame start signal end of described control module, 3rd input end is connected with the start of line signal end of described control module, output terminal is connected with the input end of described control module, described counting module is used under the control of described start of line signal end, count when receiving described first level signal, and when stored count number of times is not less than default value in a frame time, export the input end of reverse control signal to described control module; Described counting module does not count when receiving described second electrical level signal;
The frame start signal end of described control module is used for described counting module incoming frame start signal, start of line signal end is used for described counting module input clock signal, described control module is used for when receiving described reverse control signal, exports and controls the control signal that pixel carries out reversal of poles.
2. common electric voltage feedback signal testing circuit as claimed in claim 1, it is characterized in that, described comparison module, specifically comprises: dual-threshold voltage comparator and protective resistance;
First negative input of described dual-threshold voltage comparator is for inputting described first reference signal; first normal phase input end is connected with the second negative input and for inputting described common electric voltage feedback signal; second normal phase input end is for inputting described second reference signal; first control end is connected with reference signal end one end with described protective resistance respectively; second control end is connected with ground level signal end, and output terminal is connected with the first input end of described counting module with the other end of described protective resistance respectively.
3. common electric voltage feedback signal testing circuit as claimed in claim 1, it is characterized in that, described counting module, specifically comprises: counter;
The input end of described counter is connected with the output terminal of described comparison module, clock signal terminal is connected with the start of line signal end of described control module, reset signal end is connected with the frame start signal end of described control module, and output terminal is connected with the input end of described control module.
4. the common electric voltage feedback signal testing circuit as described in any one of claim 1-3, is characterized in that, also comprise: the first reference signal generation module and the second reference signal generation module; Wherein
Described first reference signal generation module for generating described first reference signal, and outputs to the first reference signal end of described comparison module;
Described second reference signal generation module for generating described second reference signal, and outputs to the second reference signal end of described comparison module.
5. common electric voltage feedback signal testing circuit as claimed in claim 4, it is characterized in that, described first reference signal generation module, specifically comprises: the first comparer, the second comparer, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance and the 8th resistance; Wherein,
The normal phase input end of described first comparer is connected with one end of described first resistance, and negative input is connected with one end of described second resistance, and output terminal is connected with one end of described 5th resistance with the other end of described first resistance respectively;
The other end of described second resistance is connected with one end of described 4th resistance with one end of described 3rd resistance respectively;
The other end of described 3rd resistance is connected with described reference signal end;
The other end of described 4th resistance is connected with described ground level signal end;
The normal phase input end of described second comparer is connected with one end of described 8th resistance with one end of described 6th resistance respectively, negative input is connected with one end of described 7th resistance with the other end of described 5th resistance respectively, and output terminal is connected with the first reference signal end of described comparison module with the other end of described 7th resistance respectively;
The other end of described 6th resistance is connected with public voltage signal end;
The other end of described 8th resistance is connected with described ground level signal end.
6. common electric voltage feedback signal testing circuit as claimed in claim 4, it is characterized in that, described second reference signal generation module, specifically comprises: the 3rd comparer, the 4th comparer, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance, the 14 resistance, the 15 resistance, the 16 resistance and the 17 resistance; Wherein,
The normal phase input end of described 3rd comparer is connected with one end of described 9th resistance, and negative input is connected with one end of described tenth resistance, and output terminal is connected with one end of described 15 resistance with the other end of described 9th resistance respectively;
The other end of described tenth resistance is connected with one end of described 12 resistance with one end of described 11 resistance respectively;
The other end of described 11 resistance is connected with described reference signal end;
The other end of described 12 resistance is connected with described ground level signal end;
The normal phase input end of described 4th comparer is connected with one end of described 16 resistance with one end of described 14 resistance, the other end of described 15 resistance respectively, negative input is connected with one end of described 17 resistance with the other end of described 13 resistance respectively, and output terminal is connected with the second reference signal end of described comparison module with the other end of described 17 resistance respectively;
The other end of described 13 resistance is connected with described ground level signal end;
The other end of described 14 resistance is connected with described public voltage signal end;
The other end of described 16 resistance is connected with described ground level signal end.
7. a display panel, is characterized in that, comprises source driving chip and the common electric voltage feedback signal testing circuit as described in any one of claim 1-6;
Described common electric voltage feedback signal testing circuit carries out the control signal of reversal of poles to described source driving chip for exporting control pixel;
Described source driving chip is used for when receiving described control signal, reversion present frame and next frame are input to the polarity of the signal of even rows, or with two row pixels be one group to the identical signal of two row pixels input polarity often organized in present frame and next frame, and the pixel of adjacent sets inputs opposite polarity signal.
8. a display device, is characterized in that, comprises display panel as claimed in claim 7.
9. a detection method for the common electric voltage feedback signal as described in any one of claim 1-6, is characterized in that, comprising:
Determine whether the magnitude of voltage of described common electric voltage feedback signal exceedes the range of voltage values of described first reference signal and described second reference signal restriction, when the magnitude of voltage of described common electric voltage feedback signal exceedes the range of voltage values of described first reference signal and described second reference signal restriction, export the first input end of the first level signal to described counting module, otherwise, export the first input end of second electrical level signal to described counting module;
Count when receiving described first level signal, and when stored count number of times is not less than default value in a frame time, export reverse control signal;
When receiving described reverse control signal, exporting and controlling the control signal that pixel carries out reversal of poles.
10. a control method for display panel as claimed in claim 7, is characterized in that, comprising:
When receiving control pixel and carrying out the control letter of reversal of poles, reversion present frame and next frame are input to the polarity of the signal of even rows, or with two row pixels be one group to the identical signal of two row pixels input polarity often organized in present frame and next frame, and the pixel of adjacent sets inputs opposite polarity signal;
When determining that the described next frame after reversing receives described control signal again, reversion present frame and next frame are input to the polarity of the signal of even rows again, or with two row pixels be one group to the identical signal of two row pixels input polarity often organized in present frame and next frame, and the pixel of adjacent sets inputs opposite polarity signal, otherwise the signal polarity being input to each pixel from next frame returns to the initialize signal that adjacent lines and adjacent column are contrary.
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