CN104318889A - Drive method and circuit of display panel and display device - Google Patents
Drive method and circuit of display panel and display device Download PDFInfo
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- CN104318889A CN104318889A CN201410645226.7A CN201410645226A CN104318889A CN 104318889 A CN104318889 A CN 104318889A CN 201410645226 A CN201410645226 A CN 201410645226A CN 104318889 A CN104318889 A CN 104318889A
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Abstract
The invention provides a drive method and circuit of a display panel and a display device and belongs to the field of display technologies. The drive method of the display panel includes the steps that when a test picture is displayed, brightness information of a preset region is obtained; according to the obtained brightness information, a gate drive signal of the preset region is modulated; a modulated gate drive signal is input into pixels of the preset region. According to the technical scheme, the problem that transverse stripes occur when a pure color picture is displayed on the display panel is solved.
Description
Technical field
The present invention relates to display technique field, refer to a kind of driving method and driving circuit, display device of display panel especially.
Background technology
At present, in display field, the application of flat pannel display combination is more and more extensive, and what apply along with large-scale combination is the unremitting pursue of panel vendor to the extremely narrow piece of splicing product, and current piece has entered into and has been less than the 4mm epoch.As shown in Figure 1, the existing display panel being used for carrying out splicing adopts the design of X printed circuit board (PCB) 1+Y printed circuit board (PCB) 2, and wherein 3 is territory, effective display area.Along with reducing gradually of piece, the frame of display panel also comes narrower, and the region leaving fan section wiring for is also more and more narrow, and the routing resistance of display panel zones of different can be caused like this not mate, the pixel charge rate of zones of different is uneven, and then causes fringe phenomena.As shown in Figure 2, because the wiring impedance in first area 4, second area 5, the 3rd region 6, the 4th region 7 does not mate, cause occurring travers and X-Block phenomenon when showing pure color picture.
Prior art generally by optimize wiring, improve Gate (grid) improves routing resistance matching and pixel charge rate to modes such as cut-in voltages, but due to the frame of display panel more and more narrow, the space leaving fan section Wiring optimization for is not enough already; And improve Gate must cause rising from power consumption to cut-in voltage and the reduction in driving circuit life-span.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of driving method and driving circuit, display device of display panel, can solve travers appear in display panel problem when showing pure color picture.
For solving the problems of the technologies described above, embodiments of the invention provide technical scheme as follows:
On the one hand, a kind of driving method of display panel is provided, comprises:
When showing test pictures, obtain the monochrome information of predeterminable area;
The gate drive signal of monochrome information to predeterminable area according to obtaining is modulated;
Gate drive signal after modulation is input in the pixel of predeterminable area.
Further, described predeterminable area comprises a line or multirow pixel.
Further, the monochrome information of described acquisition predeterminable area comprises:
The pictorial information of described test pictures is gathered by data acquisition equipment;
The pictorial information collected is processed, obtains the monochrome information of predeterminable area.
Further, the described monochrome information according to obtaining is carried out modulation to the gate drive signal of predeterminable area and is comprised:
The waveform modulating signal corresponding according to the gate drive signal of the monochrome information determination predeterminable area obtained;
Modulate according to the gate drive signal of waveform modulating signal to predeterminable area of correspondence.
Further, the waveform modulating signal that the gate drive signal of the described monochrome information determination predeterminable area according to obtaining is corresponding comprises:
Monochrome information according to obtaining searches the default table of comparisons, the corresponding relation between monochrome information and waveform modulating signal is stored, using waveform modulating signal corresponding for the monochrome information of predeterminable area as waveform modulating signal corresponding to the gate drive signal of predeterminable area in the described table of comparisons.
Further, the grey decision-making of described test pictures is 127.
The embodiment of the present invention additionally provides a kind of driving circuit of display panel, comprising:
Processing module, for when showing test pictures, obtains the monochrome information of predeterminable area;
Modulation module, for modulating according to the gate drive signal of monochrome information to predeterminable area obtained;
Output module, for being input to the gate drive signal after modulation in the pixel of predeterminable area.
Further, described processing module comprises:
Collecting unit, for gathering the pictorial information of described test pictures by data acquisition equipment;
Computing unit, for processing the pictorial information collected, obtains the monochrome information of predeterminable area.
Further, described modulation module comprises:
Search unit, for the waveform modulating signal corresponding according to the gate drive signal of the monochrome information determination predeterminable area obtained;
Signal processing unit, modulates for the gate drive signal of waveform modulating signal to predeterminable area according to correspondence
Further, described modulation module also comprises:
Storage unit, for storing the default table of comparisons, stores the corresponding relation between monochrome information and waveform modulating signal in the described table of comparisons;
Described unit of searching specifically for searching the described table of comparisons according to the monochrome information obtained, using waveform modulating signal corresponding for the monochrome information of predeterminable area as waveform modulating signal corresponding to the gate drive signal of predeterminable area.
Further, described signal processing unit comprises electric capacity, diode, the first phase inverter and the second phase inverter, wherein:
The inverting input of described first phase inverter is connected with waveform modulating signal input end, the inverting input of described first phase inverter is also connected with the output terminal of described first phase inverter, the normal phase input end of described first phase inverter is connected with high level output end, the normal phase input end also ground connection of described first phase inverter, the output terminal of described first phase inverter is connected with gate drive signal output terminal by electric capacity;
The inverting input of described second phase inverter is connected with the output terminal of described second phase inverter, the normal phase input end of described second phase inverter is connected with fixed level output terminal, the normal phase input end also ground connection of described second phase inverter, the output terminal of described second phase inverter is connected with described gate drive signal output terminal by diode.
The embodiment of the present invention additionally provides a kind of display device, comprises the driving circuit of display panel as above.
Embodiments of the invention have following beneficial effect:
In such scheme, when showing test pictures, obtain the monochrome information in region, the gate drive signal of monochrome information to region according to obtaining is modulated, and is input in the pixel in region by the gate drive signal after modulation afterwards.Technical scheme of the present invention is modulated gate drive signal according to the monochrome information in region, and then the duration of charging of adjustment pixel, thus reaches equilibrium brightness, reduction or eliminate the effect of X-Block.Technical scheme of the present invention does not need the power consumption increasing display panel, and can not affect the life-span of product.
Accompanying drawing explanation
Fig. 1 is the structural representation of display panel in prior art;
Fig. 2 is the schematic diagram that in prior art, travers appear in display panel when showing pure color picture;
Fig. 3 is the schematic flow sheet of the driving method of the display panel of the embodiment of the present invention;
Fig. 4 is the structural representation of the driving circuit of the display panel of the embodiment of the present invention;
Fig. 5 is the electrical block diagram of the signal processing unit of the embodiment of the present invention;
The waveform schematic diagram that Fig. 6 outputs signal for OE2 signal, Von1 signal and MLG in structure shown in Fig. 5;
Fig. 7 is the waveform schematic diagram of the OE2 signal in each region in the specific embodiment of the invention;
Fig. 8 is the embodiment of the present invention eliminates travers schematic diagram when showing pure color picture.
Embodiment
For embodiments of the invention will be solved technical matters, technical scheme and advantage clearly, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
Embodiments of the invention provide a kind of driving method and driving circuit, display device of display panel, can solve travers appear in display panel problem when showing pure color picture.
Embodiment one
Fig. 3 is the schematic flow sheet of the driving method of the present embodiment display panel, and as shown in Figure 3, the present embodiment comprises:
Step 101: when showing test pictures, obtains the monochrome information of predeterminable area;
Wherein, test pictures is pure color picture, and particularly, the grey decision-making of test pictures can be 127.Predeterminable area can comprise a line or multirow pixel, by the pictorial information of data acquisition equipment such as high-definition camera collecting test picture, can process, obtain the monochrome information in each region to the pictorial information collected.
Step 102: the gate drive signal of monochrome information to predeterminable area according to obtaining is modulated;
Particularly, the monochrome information in region can be sent to data processor by data acquisition equipment, such as TCON (timer/counter control register) or SOC (system level chip), the default table of comparisons is searched according to the monochrome information obtained by data processor, the corresponding relation between monochrome information and waveform modulating signal is stored in this table of comparisons, the waveform modulating signal of the corresponding different in width of different monochrome informations, using waveform modulating signal corresponding for the monochrome information of predeterminable area as waveform modulating signal corresponding to the gate drive signal of predeterminable area, modulate according to the gate drive signal of waveform modulating signal to predeterminable area of correspondence.
Step 103: the gate drive signal after modulation is input in the pixel of predeterminable area.
Owing to adopting the waveform modulating signal of different in width to modulate gate drive signal, therefore therefore the waveform of gate drive signal also changes, and then have adjusted the duration of charging of respective pixel, thus can the brightness of balanced zones of different.
The present embodiment, when showing test pictures, obtains the monochrome information in region, and the gate drive signal of monochrome information to region according to obtaining is modulated, and is input in the pixel in region by the gate drive signal after modulation afterwards.Technical scheme of the present invention is modulated gate drive signal according to the monochrome information in region, and then the duration of charging of adjustment pixel, thus reaches equilibrium brightness, reduction or eliminate the effect of X-Block.Technical scheme of the present invention does not need the power consumption increasing display panel, and can not affect the life-span of product.
Embodiment two
Present embodiments provide a kind of driving circuit of display panel, as shown in Figure 4, the present embodiment comprises:
Processing module, for when showing test pictures, obtains the monochrome information of predeterminable area;
Modulation module, for modulating according to the gate drive signal of monochrome information to predeterminable area obtained;
Output module, for being input to the gate drive signal after modulation in the pixel of predeterminable area.
Further, described processing module comprises:
Collecting unit, for gathering the pictorial information of described test pictures by data acquisition equipment;
Computing unit, for processing the pictorial information collected, obtains the monochrome information of predeterminable area.
Further, described modulation module comprises:
Search unit, for the waveform modulating signal corresponding according to the gate drive signal of the monochrome information determination predeterminable area obtained, particularly, searching unit can be data processor, TCON (timer/counter control register) or SOC (system level chip);
Signal processing unit, modulates for the gate drive signal of waveform modulating signal to predeterminable area according to correspondence
Further, described signal processing unit comprises electric capacity, diode, the first phase inverter and the second phase inverter, wherein:
The inverting input of described first phase inverter is connected with waveform modulating signal input end, the inverting input of described first phase inverter is also connected with the output terminal of described first phase inverter, the normal phase input end of described first phase inverter is connected with high level output end, the normal phase input end also ground connection of described first phase inverter, the output terminal of described first phase inverter is connected with gate drive signal output terminal by electric capacity;
The inverting input of described second phase inverter is connected with the output terminal of described second phase inverter, the normal phase input end of described second phase inverter is connected with fixed level output terminal, the normal phase input end also ground connection of described second phase inverter, the output terminal of described second phase inverter is connected with described gate drive signal output terminal by diode.
Particularly, the electrical block diagram of signal processing unit as shown in Figure 5, includes phase inverter F1, phase inverter F2, resistance R1, R2, R3, R4, R5 and R6, electric capacity C, diode D.Wherein, R1 is connected with between the inverting input of phase inverter F1 and waveform modulating signal OE2 input end, R2 is connected with between the inverting input of phase inverter F1 and output terminal, R3 is connected with between the normal phase input end of phase inverter F1 and high level AVDD output terminal, be connected with R4 between the normal phase input end of phase inverter F1 and earth point, between the output terminal of phase inverter F1 and gate drive signal MLG output terminal, be connected with electric capacity C;
The inverting input of phase inverter F2 is connected with output terminal, R5 is connected with between the normal phase input end of phase inverter F2 and fixed level Von1 output terminal, be connected with R6 between the normal phase input end of phase inverter F2 and earth point, between the output terminal of phase inverter F2 and gate drive signal MLG output terminal, be connected with diode D.
The waveform schematic diagram that Fig. 6 outputs signal for OE2 signal, Von1 signal and MLG in structure shown in Fig. 5, can find out, MLG output signal is contrary with the polarity of OE2 signal.
Further, described modulation module also comprises:
Storage unit, for storing the default table of comparisons, stores the corresponding relation between monochrome information and waveform modulating signal in the described table of comparisons;
Described unit of searching specifically for searching the described table of comparisons according to the monochrome information obtained, using waveform modulating signal corresponding for the monochrome information of predeterminable area as waveform modulating signal corresponding to the gate drive signal of predeterminable area.
Embodiment three
The embodiment of the present invention additionally provides a kind of display device, comprises the driving circuit of above-mentioned display panel.Wherein, the structure of the driving circuit of display panel and the same above-described embodiment of principle of work, do not repeat them here.In addition, the structure of other parts of display device with reference to prior art, can be not described in detail this herein.This display device can be: liquid crystal panel, Electronic Paper, LCD TV, liquid crystal display, digital album (digital photo frame), mobile phone, panel computer etc. have product or the parts of any Presentation Function.
Embodiment four
The driving method of the display panel of the present embodiment comprises the following steps:
Step a: when display panel display grey decision-making is the pure color picture of 127, the display brightness of different rows is gathered by high-definition camera, particularly, as shown in Figure 2, the wiring impedance in the first area 4 of display panel, second area 5, the 3rd region 6, the 4th region 7 does not mate, display brightness in each region is identical, the display brightness of zones of different is different, cause occurring travers at the intersection of zones of different, gathered the display brightness in first area 4, second area 5, the 3rd region 6, the 4th region 7 by high-definition camera;
Step b: store the default table of comparisons in TCON/SOC, the corresponding relation between display brightness and waveform modulating signal OE2 is stored in this table of comparisons, the waveform modulating signal OE2 of the corresponding different in width of different display brightness, respectively the display brightness in first area 4, second area 5, the 3rd region 6, the 4th region 7 is converted to the waveform modulating signal OE2 of different in width according to the table of comparisons, as shown in Figure 7;
Step c: the waveform modulating signal OE2 of zones of different is inputted circuit as shown in Figure 5, the original gate drive singal in each region is modulated, is finally input to the gate drive signal in each area pixel.Waveform modulating signal OE2 is in the time that low level Time dependent modulation post tensioned unbonded prestressed concrete drive singal is in high level, and then determine the duration of charging of respective pixel, utilize waveform modulating signal OE2 to modulate gate drive signal, the duration of charging of respective pixel can be adjusted;
Steps d: the gate drive signal after modulation is input in the pixel in first area 4, second area 5, the 3rd region 6, the 4th region 7 respectively, drive corresponding gate electrode, because the duration of charging of pixel obtains adjustment, thus equilibrium brightness, reduction can be reached or eliminate the effect of X-Block, as shown in Figure 8.
Many functional parts described in this instructions are all called as module, specifically to emphasize the independence of its implementation.
In the embodiment of the present invention, module can use software simulating, to be performed by various types of processor.For example, the executable code module of a mark can comprise one or more physics or the logical block of computer instruction, and for example, it can be built as object, process or function.However, the executable code of institute's identification module is does not have to be physically positioned at together, but can comprise and be stored in different different instruction physically, when these command logics combine, and its composition module and realize the regulation object of this module.
In fact, executable code module can be individual instructions or many bar instructions, and even can be distributed on multiple different code segment, is distributed in the middle of distinct program, and crosses over the distribution of multiple memory devices.Similarly, service data can be identified in module, and can realize according to any suitable form and be organized in the data structure of any suitable type.Described service data can be collected as individual data collection, or can be distributed on diverse location and (be included in different storage device), and can only be present on system or network as electronic signal at least in part.
When module can utilize software simulating, consider the level of existing hardware technique, so can with the module of software simulating, when not considering cost, those skilled in the art can build corresponding hardware circuit and realize corresponding function, and described hardware circuit comprises existing semiconductor or other discrete element of conventional ultra-large integrated (VLSI) circuit or gate array and such as logic chip, transistor and so on.Module can also use programmable hardware device, the realizations such as such as field programmable gate array, programmable logic array, programmable logic device.
In each embodiment of the method for the present invention; the sequence number of described each step can not be used for the sequencing limiting each step; for those of ordinary skill in the art, under the prerequisite not paying creative work, the priority of each step is changed also within protection scope of the present invention.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (12)
1. a driving method for display panel, is characterized in that, comprising:
When showing test pictures, obtain the monochrome information of predeterminable area;
The gate drive signal of monochrome information to predeterminable area according to obtaining is modulated;
Gate drive signal after modulation is input in the pixel of predeterminable area.
2. the driving method of display panel according to claim 1, is characterized in that, described predeterminable area comprises a line or multirow pixel.
3. the driving method of display panel according to claim 2, is characterized in that, the monochrome information of described acquisition predeterminable area comprises:
The pictorial information of described test pictures is gathered by data acquisition equipment;
The pictorial information collected is processed, obtains the monochrome information of predeterminable area.
4. the driving method of display panel according to claim 2, is characterized in that, the described monochrome information according to obtaining is carried out modulation to the gate drive signal of predeterminable area and comprised:
The waveform modulating signal corresponding according to the gate drive signal of the monochrome information determination predeterminable area obtained;
Modulate according to the gate drive signal of waveform modulating signal to predeterminable area of correspondence.
5. the driving method of display panel according to claim 4, is characterized in that, the waveform modulating signal that the gate drive signal of the described monochrome information determination predeterminable area according to obtaining is corresponding comprises:
Monochrome information according to obtaining searches the default table of comparisons, the corresponding relation between monochrome information and waveform modulating signal is stored, using waveform modulating signal corresponding for the monochrome information of predeterminable area as waveform modulating signal corresponding to the gate drive signal of predeterminable area in the described table of comparisons.
6. the driving method of the display panel according to any one of claim 1-5, is characterized in that, the grey decision-making of described test pictures is 127.
7. a driving circuit for display panel, is characterized in that, comprising:
Processing module, for when showing test pictures, obtains the monochrome information of predeterminable area;
Modulation module, for modulating according to the gate drive signal of monochrome information to predeterminable area obtained;
Output module, for being input to the gate drive signal after modulation in the pixel of predeterminable area.
8. the driving circuit of display panel according to claim 7, is characterized in that, described processing module comprises:
Collecting unit, for gathering the pictorial information of described test pictures by data acquisition equipment;
Computing unit, for processing the pictorial information collected, obtains the monochrome information of predeterminable area.
9. the driving circuit of display panel according to claim 7, is characterized in that, described modulation module comprises:
Search unit, for the waveform modulating signal corresponding according to the gate drive signal of the monochrome information determination predeterminable area obtained;
Signal processing unit, modulates for the gate drive signal of waveform modulating signal to predeterminable area according to correspondence.
10. the driving circuit of display panel according to claim 9, is characterized in that, described modulation module also comprises:
Storage unit, for storing the default table of comparisons, stores the corresponding relation between monochrome information and waveform modulating signal in the described table of comparisons;
Described unit of searching specifically for searching the described table of comparisons according to the monochrome information obtained, using waveform modulating signal corresponding for the monochrome information of predeterminable area as waveform modulating signal corresponding to the gate drive signal of predeterminable area.
The driving circuit of 11. display panels according to claim 9, is characterized in that, described signal processing unit comprises electric capacity, diode, the first phase inverter and the second phase inverter, wherein:
The inverting input of described first phase inverter is connected with waveform modulating signal input end, the inverting input of described first phase inverter is also connected with the output terminal of described first phase inverter, the normal phase input end of described first phase inverter is connected with high level output end, the normal phase input end also ground connection of described first phase inverter, the output terminal of described first phase inverter is connected with gate drive signal output terminal by electric capacity;
The inverting input of described second phase inverter is connected with the output terminal of described second phase inverter, the normal phase input end of described second phase inverter is connected with fixed level output terminal, the normal phase input end also ground connection of described second phase inverter, the output terminal of described second phase inverter is connected with described gate drive signal output terminal by diode.
12. 1 kinds of display device, is characterized in that, comprise the driving circuit of the display panel according to any one of claim 7-11.
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| CN201410645226.7A CN104318889B (en) | 2014-11-12 | 2014-11-12 | Drive method and circuit of display panel and display device |
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