CN103794173A - Plasma display equipment display method and device - Google Patents
Plasma display equipment display method and device Download PDFInfo
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Abstract
The invention discloses a plasma display equipment display method and a device. The method comprises steps that: that waveform time length of an input image is greater than time length of a pre-detected field synchronization signal is determined; according to the difference of the waveform time length of the input image and the time length of the field synchronization signal, an APL value of the input image is updated, and the maintenance pulse number corresponding to the APL value of the input image after update is smaller than the maintenance pulse number of the APL value of the input image before update; the control waveform corresponding to the APL value after update is utilized to drive the plasma display screen equipment to display the input image. According to the method, the waveform of the input image does not overflow relative to the field synchronization signal, and frame scintillation and image quality reduction are avoided.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of display packing and device of plasma display panel device.
Background technology
Plasmia indicating panel, in the time of HF voltage guiding discharge, discharge gas produces vacuum ultraviolet (Vacuum Ultraviolet ray), makes to form light-emitting phosphor and display frame between interlayer.The advantage of plasma display panel device is thin thickness and lightweight, and can be manufactured goes out large and high resolution.
For the gray level of concrete manifestation image, several subfields by a frame is divided into different amount of luminescence drive plasma display panel device.Each subfield is divided into the reset cycle for evenly producing electric discharge, for selecting the addressing period of discharge cell, for according to the cycle that maintains of discharge count amount concrete manifestation gray level.For example, in the time of 256 gray level display images, the frame period corresponding to 1/60 second (16.67ms) is divided into 8 subfields.Each subfield of 8 subfields is again divided into addressing period and maintains the cycle, and the reset cycle of each subfield is identical with addressing period.But in each subfield, maintain cycle and electric discharge number thereof and maintain number of pulses by the increase of certain ratio.Because maintain cycle difference in each subfield, so gray level that can concrete manifestation image.
Fig. 1 be while normally showing according to the image of correlation technique one field wave shape with respect to the schematic diagram of field sync signal, as shown in Figure 1, at plasma display (Plasma Display Panel, referred to as PDP) in display packing, one two field picture is divided into multiple subfields, and each subfield comprises reset addressing cycle and sustain discharge cycle.Here describe as an example of the gray scale of 6 subfields example.One two field picture is temporarily divided into six subfields, and each subfield comprises reset addressing cycle A
1-A
6with sustain discharge cycle S
1-S
6.One field wave shape Len req is just T=SUM (A
1: A
6)+SUM (S
1: S
6).Last maintains the distance that pulse does not exceed synchronizing signal rising edge the normal display waveform of image.As under NT standard, field sync period is 16.67ms, T <=16.67ms.
But, in the time there is deviation in the frequency of outside input picture, may cause the cycle of frame data higher than 16.67ms, at this moment can cause waveform to overflow (, when field sync signal is from 0 becomes 1 when, maintain pulse and still do not finish) with respect to field sync signal.Below in conjunction with Fig. 2, waveform is overflowed and is described in detail with respect to field sync signal.
Fig. 2 is the schematic diagram that the waveform that may occur during according to the input picture frequency anomaly of correlation technique overflows with respect to field sync signal, as shown in Figure 2, describe as an example of the gray scale of 6 subfields example equally, in the time that plasma display panel device receives NT signal, a field wave shape Len req is just T=SUM (A
1: A
6)+SUM (S
1: S
6) > 16.67ms, now there is waveform spillover.
Waveform overflows the change that must occur on picture with respect to field sync signal, may occur the bad phenomenon such as flicker (Flicker), causes the reduction of image quality.
Summary of the invention
The invention provides a kind of display packing and device of plasma display panel device, at least to solve in correlation technique, overflow because input picture frequency departure causes waveform the problem that causes plasma display panel device film flicker with respect to field sync signal.
According to an aspect of the present invention, provide a kind of display packing of plasma display panel device, having comprised: determined that the waveform time span of input picture is greater than the time span of the field sync signal detecting in advance; According to the difference of the time span of the waveform time span of input picture and field sync signal, upgrade automatic energy grade (the Auto Power Level of input picture, referred to as APL) value, umber of pulse that what the APL value of the input picture after wherein upgrading was corresponding maintain be less than the input picture before renewal APL value correspondence maintain umber of pulse; Use with upgrade after control waveform corresponding to APL value, drive plasma display panel device demonstration input picture.
Preferably, according to the difference of the time span of the waveform time span of input picture and field sync signal, the APL value of upgrading input picture comprises: according to the difference of the time span of the waveform time span of input picture and field sync signal, and the renewal amount that maintains umber of pulse that the APL value of calculating input image is corresponding; According to renewal amount, the APL value of input picture is upgraded.
Preferably, according to the difference of the time span of the waveform time span of input picture and field sync signal, the renewal amount that maintains umber of pulse corresponding to the APL value of calculating input image comprises: calculate renewal amount N=CEILING[(T-T
vsync)/T
s, 1], wherein T is waveform time span, the T of input picture
vsynctime span, the T of field sync signal
sthat cycle of maintaining pulse, function CEILING are for rounding up to result of calculation.
Preferably, according to renewal amount, the APL value of input picture is upgraded and comprised: in predefined APL table, search and maintain one or more APL that umber of pulse is less than or equal to the difference that maintains umber of pulse and renewal amount of the APL value correspondence of the input picture before renewal; In one or more APL, determine that the APL that maintains umber of pulse maximum is as the APL value of the input picture after upgrading.
Preferably, before the waveform time span of determining input picture is greater than the time span of field sync signal, said method also comprises: determine that the frequency of input picture and the frequency of previous frame input picture are inconsistent; Relatively the waveform time span of input picture and the in advance time span of the field sync signal of detection.
Preferably, in the case of determining that the frequency of input picture and the frequency of previous frame input picture are consistent, said method also comprises: use the renewal amount that maintains umber of pulse corresponding to APL value of previous frame input picture to upgrade the APL value of input picture; Use with upgrade after control waveform corresponding to APL value, drive plasma display panel device demonstration input picture.
According to a further aspect in the invention, provide a kind of display device of plasma display panel device, having comprised: determination module, for determining that the waveform time span of input picture is greater than the time span of the field sync signal detecting in advance; Update module, be used for according to the difference of the time span of the waveform time span of input picture and field sync signal, upgrade the APL value of input picture, the APL value correspondence of the input picture after wherein upgrading maintain umber of pulse be less than the input picture before renewal APL value correspondence maintain umber of pulse; Driver module, for use with upgrade after control waveform corresponding to APL value, drive plasma display panel device to show input picture.
Preferably, update module comprises: calculating sub module, and for according to the difference of the time span of the waveform time span of input picture and field sync signal, the renewal amount that maintains umber of pulse that the APL value of calculating input image is corresponding; Upgrade submodule, for the APL value of input picture being upgraded according to renewal amount.
Preferably, calculating sub module comprises: computing unit, and for calculating renewal amount N=CEILING[(T-T
vsync)/T
s, 1], wherein T is waveform time span, the T of input picture
vsynctime span, the T of field sync signal
sthat cycle of maintaining pulse, function CEILING are for rounding up to result of calculation.
Preferably, upgrade submodule and comprise: search unit, at predefined APL table, search and maintain one or more APL that umber of pulse is less than or equal to the difference that maintains umber of pulse and renewal amount of the APL value correspondence of the input picture before renewal; Determining unit, at one or more APL, determines that the APL that maintains umber of pulse maximum is as the APL value of the input picture after upgrading.
The present invention utilizes the difference of the waveform time span of input picture and the time span of field sync signal, upgrade the APL value of this input picture, the relative field sync signal of waveform of input picture is not overflowed, thus the problem of having avoided film flicker, image quality to reduce.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 be while normally showing according to the image of correlation technique one field wave shape with respect to the schematic diagram of field sync signal;
Fig. 2 is the schematic diagram that the waveform that may occur during according to the input picture frequency anomaly of correlation technique overflows with respect to field sync signal;
Fig. 3 is according to the process flow diagram of the display packing of the plasma display panel device of the embodiment of the present invention;
Fig. 4 is according to the structural representation of the display device of the plasma display panel device of the preferred embodiment of the present invention one;
Fig. 5 is the schematic diagram of dynamically adjusting according to APL curve corresponding to Fig. 4 of the preferred embodiment of the present invention one;
Fig. 6 is according to the structural representation of the display device of the plasma display panel device of the preferred embodiment of the present invention two;
Fig. 7 is the schematic diagram of dynamically adjusting according to APL curve corresponding to Fig. 6 of the preferred embodiment of the present invention two;
Fig. 8 is according to the structured flowchart of the display device of the plasma display panel device of the embodiment of the present invention;
Fig. 9 is the structured flowchart one of the display device of plasma display panel device according to the preferred embodiment of the invention;
Figure 10 is the structured flowchart two of the display device of plasma display panel device according to the preferred embodiment of the invention;
Figure 11 is the structured flowchart three of the display device of plasma display panel device according to the preferred embodiment of the invention;
Figure 12 is the structured flowchart four of the display device of plasma display panel device according to the preferred embodiment of the invention;
Figure 13 is the structured flowchart five of the display device of plasma display panel device according to the preferred embodiment of the invention.
Embodiment
It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the application can combine mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
The invention provides a kind of display packing of plasma display panel device, Fig. 3 is according to the process flow diagram of the display packing of the plasma display panel device of the embodiment of the present invention, as shown in Figure 3, comprises that following step S302 is to step S306.
Step S302, determines that the waveform time span of input picture is greater than the time span of the field sync signal detecting in advance.
Step S304, according to the difference of the time span of the waveform time span of input picture and field sync signal, upgrade the APL value of input picture, the APL value correspondence of the input picture after wherein upgrading maintain umber of pulse be less than the input picture before renewal APL value correspondence maintain umber of pulse.
Step S306, use with upgrade after control waveform corresponding to APL value, drive plasma display panel device demonstration input picture.
In correlation technique, because causing that the relative field sync signal of waveform is overflowed, input picture frequency departure causes plasma display panel device film flicker.The embodiment of the present invention is utilized the difference of the waveform time span (corresponding to input picture frequency) of input picture and the time span of field sync signal, upgrade the APL value of this input picture, the relative field sync signal of waveform of input picture is not overflowed, thus the problem of having avoided film flicker, image quality to reduce.
In order to upgrade more accurately and efficiently the APL value of input picture, the present invention has also carried out some to the display packing of above-mentioned plasma display panel device and has improved, and specifically describes as follows.
One, calculate accurately and efficiently the APL value of the input picture after upgrading
In step S304, propose to upgrade the APL value of input picture, particularly, can be first according to the difference of the time span of the waveform time span of input picture and field sync signal, the renewal amount that maintains umber of pulse corresponding to APL value of calculating input image; Then, then according to this renewal amount the APL value of input picture is upgraded.
Above-mentioned calculation procedure can be carried out according to following formula (1).
N＝CEIUNG[(T-T
vsync)/T
s，1]……(1)
Wherein N is that this renewal amount, T are waveform time span, the T of input picture
vsynctime span, the T of field sync signal
sthat cycle of maintaining pulse, function CEIUNG are for rounding up to result of calculation.
Simultaneously, the above-mentioned step of the APL value of input picture being upgraded according to this renewal amount can comprise: in predefined APL table, search and maintain one or more APL that umber of pulse is less than or equal to the difference that maintains umber of pulse and renewal amount of the APL value correspondence of the input picture before renewal; In one or more APL, determine that the APL that maintains umber of pulse maximum is as the APL value of the input picture after upgrading.
Like this, due to the renewal amount N calculating be exactly overflow part corresponding maintain umber of pulse, therefore in renewal process, exclude and maintain the APL that umber of pulse is greater than the difference that maintains umber of pulse and renewal amount of the APL value correspondence of the input picture before renewal, just be equivalent to delete this overflow part corresponding maintain pulse, thereby guarantee that the relative field sync signal of waveform do not overflow.And then this formula (1) is by CEIUNG function for rounding up to result of calculation, after can further guaranteeing to upgrade, the relative field sync signal of waveform is not overflowed.
As preferred technical scheme, the above-mentioned step of the APL value of input picture being upgraded according to this renewal amount can also adopt following mode to realize,, according to maintaining umber of pulse sequential search from big to small, now, umber of pulse that what qualified APL was corresponding maintain is the value that first that find is less than or equal to A-N, and this lookup method can find qualified APL quickly and easily.
Two, the APL value of the input picture after recycling renewal
The frequency of considering input picture is relatively stable, the possibility that before and after, the frequency of two frame input pictures there are differences is not high, therefore the present invention is before the waveform time span of determining input picture is greater than the time span of field sync signal, can first determine that whether the frequency of input picture and the frequency of previous frame input picture be consistent, if consistent (following preferred embodiment two has just been described this situation) used the renewal amount that maintains umber of pulse corresponding to APL value of previous frame input picture to upgrade the APL value of input picture; And use with upgrade after control waveform corresponding to APL value, drive plasma display panel device to show input picture, if inconsistent; relatively the waveform time span of input picture and the in advance time span of the field sync signal of detection.Like this, the renewal amount that maintains umber of pulse corresponding to APL value of recycling previous frame input picture upgrades the APL value of this input picture, saved and once calculated the operation of searching APL value again, easier.
Below in conjunction with example, the implementation procedure of the embodiment of the present invention is described in detail.
Fig. 4 is according to the structural representation of the display device of the plasma display panel device of the preferred embodiment of the present invention one, and as shown in Figure 4, this device comprises signal frequency detector, APL detecting device, waveform time span counter, time comparer, APL converter.
Particularly, signal frequency detector is for surveying the frequency of external signal; APL detecting device is for detection of the APL of input picture; Waveform time span counter is for calculating the time span of output waveform; Time comparer is for comparing waveform time span and field sync signal Cycle Length; APL converter is for carrying out APL conversion according to the result of time comparer.
Corresponding to the device shown in Fig. 4, its idiographic flow is as follows:
In the time that external image is inputted, calculate frequency input signal, field sync signal time span by signal frequency detector, APL detector calculates the APL value of input picture, is further calculated the time span in all sustain discharges cycle of a field wave shape according to APL value and each periodic quantity that maintains pulse by waveform time span counter.For example, it is A that the total APL value correspondence that calculates input picture by APL detector maintains umber of pulse, this field wave shape always total A maintain umber of pulse, each cycle that maintains pulse is T
1, the time span T in total sustain discharge cycle of a field wave shape
a=A*T
1, the time span T in the reset addressing cycle of a field wave shape
b=SUM (A
1: A
6), so the T.T. length T=T of a field wave shape
a+ T
b.Then by the relatively T.T. length T and the time span T of field sync signal of a field wave shape of time comparer
vsyncif waveform time span T is greater than field sync signal time span T
vsync, there is waveform spillover, now waveform overflow part length be T-T
vsync.And then each time span that maintains pulse is T
s, needing the umber of pulse that maintains of deleting is N=CEILING[(T-T
vsync)/T
s, 1] and individual, could allow a field wave shape time span be less than or equal to field sync signal time span.The value N (needing the umber of pulse that maintains of deletion) that APL converter draws according to time comparer, always maintaining in umber of pulse according to sequential search to from big to small new APL value in APL in storer table, the umber of pulse that always maintains of this value correspondence is that first that find is less than or equal to A
nthe value of=A-N, new APL is the APL obtaining after the conversion of APL converter.Finally new APL is exported and is applied in waveform and go.
Fig. 5 is the schematic diagram of dynamically adjusting according to APL curve corresponding to Fig. 4 of the preferred embodiment of the present invention one, as shown in Figure 5, dotted line is the APL curve of setting, solid line is the APL curve after the device conversion shown in Fig. 4, after dynamically adjusting, curve is compared with setting curve, only virgin curve is maintained to the part that umber of pulse is many and adjust, remainder does not adjust.
Fig. 6 is according to the structural representation of the display device of the plasma display panel device of the preferred embodiment of the present invention two, as shown in Figure 6, this device comprises signal frequency detector, signal frequency comparer, APL detecting device, waveform time span counter, time comparer, APL converter.
Particularly, signal frequency detector is used for surveying external signal frequency; Signal frequency comparer is for contrast signal frequency; APL detecting device is for detection of the APL of image; Waveform time span counter is used for calculating output waveform time span; Time comparer is for comparing waveform time span and field sync signal Cycle Length; APL converter is for carrying out APL conversion according to the result of time comparer.
Corresponding to the device shown in Fig. 6, its idiographic flow is as follows:
In the time that external image is inputted, calculate frequency input signal, field sync signal time span by signal frequency detector, simultaneously by waveform time span counter according to each periodic quantity that maintains pulse and the maximum maximum time length that maintains umber of pulse and can calculate all sustain discharges phase of a field wave shape.For example showing to find maximum by APL, to maintain umber of pulse be A, and maximum total total A of a field wave shape maintains umber of pulse, and each cycle that maintains pulse is T
1, the time span T in total sustain discharge cycle of the maximum of a field wave shape
a=A*T
1, the time span T in the reset addressing cycle of a field wave shape
b=SUM (A
1: A
6), so the T.T. length T=T of a field wave shape
a+ T
b.Then compared the time span T of a total waveform time span T and field sync signal by time comparer
vsyncif waveform time span is greater than field sync signal time span, may there is waveform spillover, now waveform overflow part length be T-T
vsync.Each time span that maintains pulse is T
s, need off-set value N=CEILING[(T-T
vsync)/T
s, 1] and the individual umber of pulse that maintains, could allow a field wave shape time span be less than or equal to all the time field sync signal time span; APL detecting device detection computations goes out the APL value of input picture, and the umber of pulse that maintains corresponding to this value is N
athe value N (needing the umber of pulse that maintains of deletion) that APL converter draws according to time comparer, in the APL table of storer maintain umber of pulse in APL sequential search to the new APL that detects according to APL detecting device, the umber of pulse that always maintains of this value correspondence is that first that find is less than or equal to A
nthe value of=A-N, if be not less than or equal to A
nvalue, the minimum APL value that maintains umber of pulse of output; New APL is the APL for obtaining after the conversion of APL converter; Finally this APL is exported and is applied in waveform and go.If being frequency, the result drawing in signal frequency comparer do not change, namely the same with the off-set value of last time, compare without time comparer, and directly the last off-set value N obtaining of application carries out APL conversion.
Device shown in Fig. 6 is compared with the device shown in Fig. 4, increase signal frequency comparer, the frequency of input picture and the frequency ratio of previous frame input picture process are namely increased, if frequency does not change like this, directly use control waveform corresponding to APL value after the conversion of previous frame image, drive plasma display panel device to show this input picture, without the calculating search operation of carrying out repetition.
Fig. 7 is the schematic diagram of dynamically adjusting according to APL curve corresponding to Fig. 6 of the preferred embodiment of the present invention two, and as shown in Figure 7, dotted line is the APL curve of setting, and solid line is the APL curve after the device conversion shown in Fig. 6.After dynamically adjusting, curve is compared with setting curve, and curve has carried out entirety and moved down, and has eliminated waveform spillover, has realized adaptive frequency control.
Can be found out by above preferred embodiment, the present invention changes the umber of pulse that maintains of control waveform according to the frequency being detected by signal frequency detector, so that the waveform of driving voltage changes to some extent, so overcome in the plasma display apparatus existing in correlation technique because outside input picture frequency is while changing, drive waveforms maintains umber of pulse and remains unchanged and cause waveform to overflow with respect to field sync signal, the problem that picture disply is bad.The effect that the present invention reaches is as follows: eliminated the phenomenon that waveform overflows, realized adaptive frequency control, improved the display effect of plasma display panel device, improved the stability showing.
It should be noted that, can in the computer system such as one group of computer executable instructions, carry out in the step shown in the process flow diagram of accompanying drawing, and, although there is shown logical order in flow process, but in some cases, can carry out shown or described step with the order being different from herein.
The embodiment of the present invention provides a kind of display device of plasma display panel device, and the display device of this plasma display panel device can be for realizing the display packing of above-mentioned plasma display panel device.Fig. 8 is according to the structured flowchart of the display device of the plasma display panel device of the embodiment of the present invention, as shown in Figure 8, comprises the first determination module 81, the first update module 82 and the first driver module 83.Below its structure is described in detail.
The first determination module 81, for determining that the waveform time span of input picture is greater than the time span of the field sync signal detecting in advance; The first update module 82, be connected to the first determination module 81, be used for according to the difference of the time span of the waveform time span of input picture and field sync signal, upgrade the APL value of input picture, the APL value correspondence of the input picture after wherein upgrading maintain umber of pulse be less than the input picture before renewal APL value correspondence maintain umber of pulse; The first driver module 83, is connected to the first update module 82, for using control waveform corresponding to APL value after upgrading with the first update module 82, drives plasma display panel device to show input picture.
Fig. 9 is the structured flowchart one of the display device of plasma display panel device according to the preferred embodiment of the invention, as shown in Figure 9, the first update module 82 comprises: calculating sub module 822, be connected to the first determination module 81, be used for according to the difference of the time span of the waveform time span of input picture and field sync signal the renewal amount that maintains umber of pulse corresponding to APL value of calculating input image; Upgrade submodule 824, be connected to calculating sub module 822, for the renewal amount calculating according to calculating sub module 822, the APL value of input picture is upgraded.
Figure 10 is the structured flowchart two of the display device of plasma display panel device according to the preferred embodiment of the invention, and as shown in figure 10, calculating sub module 822 comprises: computing unit 8222, and for calculating renewal amount N=CEILING[(T-T
vsync)/T
s, 1], wherein T is waveform time span, the T of input picture
vsynctime span, the T of field sync signal
sthat cycle of maintaining pulse, function CEILING are for rounding up to result of calculation.
Figure 11 is the structured flowchart three of the display device of plasma display panel device according to the preferred embodiment of the invention, as shown in figure 11, upgrading submodule 824 comprises: search unit 8242, for at predefined APL table, search and maintain one or more APL that umber of pulse is less than or equal to the difference that maintains umber of pulse and renewal amount of the APL value correspondence of the input picture before renewal; Determining unit 8244, is connected to and searches unit 8242, for the one or more APL searching unit 8242 and searching, determines that the APL that maintains umber of pulse maximum is as the APL value of the input picture after upgrading.
Figure 12 is the structured flowchart four of the display device of plasma display panel device according to the preferred embodiment of the invention, and as shown in figure 12, said apparatus also comprises: the second determination module 84, and inconsistent for determining the frequency of input picture and the frequency of previous frame input picture; Comparison module 85, is connected to the second determination module 84, for the waveform time span of input picture relatively and the time span of the field sync signal of detection in advance.
Figure 13 is the structured flowchart five of the display device of plasma display panel device according to the preferred embodiment of the invention, as shown in figure 13, in the case of determining that the frequency of input picture and the frequency of previous frame input picture are consistent, said apparatus also comprises: the second update module 86, be connected to the second determination module 84, for the renewal amount that maintains umber of pulse corresponding to APL value that uses previous frame input picture, the APL value of input picture upgraded; The second driver module 87, is connected to the second update module 86, for using control waveform corresponding to APL value after upgrading with the second update module 86, drives plasma display panel device to show input picture.
It should be noted that, the display device of the plasma display panel device of describing in device embodiment is corresponding to above-mentioned embodiment of the method, and its concrete implementation procedure had been carried out detailed description in embodiment of the method, did not repeat them here.
In sum, according to the abovementioned embodiments of the present invention, provide a kind of display packing and device of plasma display panel device.The embodiment of the present invention is utilized the difference of the waveform time span of input picture and the time span of field sync signal, upgrade the APL value of this input picture, the relative field sync signal of waveform of input picture is not overflowed, thus the problem of having avoided film flicker, image quality to reduce.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that multiple calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in memory storage and be carried out by calculation element, or they are made into respectively to each integrated circuit modules, or the multiple modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a display packing for plasma display panel device, is characterized in that comprising:
Determine that the waveform time span of input picture is greater than the time span of the field sync signal detecting in advance;
According to the difference of the time span of the waveform time span of described input picture and described field sync signal, upgrade the automatic energy grade APL value of described input picture, umber of pulse that what the APL value of the described input picture after wherein upgrading was corresponding maintain be less than the described input picture before renewal APL value correspondence maintain umber of pulse;
Use with upgrade after control waveform corresponding to APL value, driving plasma display panel device shows described input picture.
2. method according to claim 1, is characterized in that, according to the difference of the time span of the waveform time span of described input picture and described field sync signal, the APL value of upgrading described input picture comprises:
According to the difference of the time span of the waveform time span of described input picture and described field sync signal, calculate the renewal amount that maintains umber of pulse corresponding to APL value of described input picture;
According to described renewal amount, the APL value of described input picture is upgraded.
3. method according to claim 2, it is characterized in that, according to the difference of the time span of the waveform time span of described input picture and described field sync signal, the renewal amount that maintains umber of pulse corresponding to APL value that calculates described input picture comprises: calculate described renewal amount N=CEILING[(T-T
vsync)/T
s, 1], wherein T is waveform time span, the T of described input picture
vsynctime span, the T of described field sync signal
sthat cycle of maintaining pulse, function CEILING are for rounding up to result of calculation.
4. method according to claim 2, is characterized in that, according to described renewal amount, the APL value of described input picture is upgraded and is comprised:
In predefined APL table, search and maintain one or more APL that umber of pulse is less than or equal to the difference that maintains umber of pulse and described renewal amount of the APL value correspondence of the described input picture before renewal;
In described one or more APL, determine that the APL that maintains umber of pulse maximum is as the APL value of the described input picture after upgrading.
5. according to the method described in any one in claim 2 to 4, it is characterized in that, before the waveform time span of determining input picture is greater than the time span of field sync signal, also comprise:
Determine that the frequency of described input picture and the frequency of previous frame input picture are inconsistent;
The time span of the waveform time span of more described input picture and the described field sync signal detecting in advance.
6. method according to claim 5, is characterized in that, in the case of determining that the frequency of described input picture and the frequency of described previous frame input picture are consistent, described method also comprises:
Use the renewal amount that maintains umber of pulse corresponding to APL value of described previous frame input picture to upgrade the APL value of described input picture;
Use with upgrade after control waveform corresponding to APL value, driving plasma display panel device shows described input picture.
7. a display device for plasma display panel device, is characterized in that comprising:
Determination module, for determining that the waveform time span of input picture is greater than the time span of the field sync signal detecting in advance;
Update module, be used for according to the difference of the time span of the waveform time span of described input picture and described field sync signal, upgrade the automatic energy grade APL value of described input picture, umber of pulse that what the APL value of the described input picture after wherein upgrading was corresponding maintain be less than the described input picture before renewal APL value correspondence maintain umber of pulse;
Driver module, for use with upgrade after control waveform corresponding to APL value, drive plasma display panel device to show described input picture.
8. device according to claim 7, is characterized in that, described update module comprises:
Calculating sub module, for according to the difference of the time span of the waveform time span of described input picture and described field sync signal, calculates the renewal amount that maintains umber of pulse corresponding to APL value of described input picture;
Upgrade submodule, for the APL value of described input picture being upgraded according to described renewal amount.
9. device according to claim 8, is characterized in that, described calculating sub module comprises: computing unit, and for calculating described renewal amount N=CEILING[(T-T
vsync)/T
s, 1], wherein T is waveform time span, the T of described input picture
vsynctime span, the T of described field sync signal
sthat cycle of maintaining pulse, function CEILING are for rounding up to result of calculation.
10. device according to claim 8, is characterized in that, described renewal submodule comprises:
Search unit, at predefined APL table, search and maintain one or more APL that umber of pulse is less than or equal to the difference that maintains umber of pulse and described renewal amount of the APL value correspondence of the described input picture before renewal;
Determining unit, at described one or more APL, determines that the APL that maintains umber of pulse maximum is as the APL value of the described input picture after upgrading.
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| CN201110459682.9A CN103794173A (en) | 2011-12-31 | 2011-12-31 | Plasma display equipment display method and device |
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| US5396258A (en) * | 1988-05-28 | 1995-03-07 | Kabushiki Kaisha Toshiba | Plasma display control system |
| US6072448A (en) * | 1996-11-27 | 2000-06-06 | Fujitsu Limited | Plasma display device driven in a subframe mode |
| CN1750092A (en) * | 2005-10-14 | 2006-03-22 | 彩虹集团电子股份有限公司 | Method for improving image quality and contrast of plasma display |
| CN101075403A (en) * | 2002-03-12 | 2007-11-21 | 富士通日立等离子显示器股份有限公司 | Plasma display apparatus |
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| US5396258A (en) * | 1988-05-28 | 1995-03-07 | Kabushiki Kaisha Toshiba | Plasma display control system |
| US6072448A (en) * | 1996-11-27 | 2000-06-06 | Fujitsu Limited | Plasma display device driven in a subframe mode |
| CN101075403A (en) * | 2002-03-12 | 2007-11-21 | 富士通日立等离子显示器股份有限公司 | Plasma display apparatus |
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Application publication date: 20140514 |