CN102368373A - Method for dynamically setting display equipment output parameter - Google Patents
Method for dynamically setting display equipment output parameter Download PDFInfo
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- CN102368373A CN102368373A CN2011103519492A CN201110351949A CN102368373A CN 102368373 A CN102368373 A CN 102368373A CN 2011103519492 A CN2011103519492 A CN 2011103519492A CN 201110351949 A CN201110351949 A CN 201110351949A CN 102368373 A CN102368373 A CN 102368373A
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Abstract
The invention relates to a method for dynamically setting a display equipment output parameter. The method is characterized by: after calculating an output spot frequency, adding a dynamic parameter adjusting module before setting a register output parameter; determining a scope of the output spot frequency; adjusting appropriately a signal parameter so as to accord with a specification requirement of a liquid crystal screen. Through determining the output spot frequency and dynamically calculating and adjusting a display parameter, a matching attribute of liquid crystal screen design and developing can be increased. And simultaneously, a standardized signal parameter detection module provides a high efficient design mode. Possible of the poor signal parameter design caused by mistakes of a designer can be avoided.
Description
Technical field
The present invention relates to a kind of method of dynamic setting display device output parameter.
Background technology
One, VESA standard
All display devices all must be followed the video display standard that VESA formulates, and as shown in Figure 1, the important display parameter of its standard are following:
The signal of line direction is counted (Htotal): summation that the line direction useful signal is counted, count in the clear area and line synchronizing signal is counted
The signal of field direction is counted (Vtotal): summation that the field direction useful signal is counted, count in the clear area and field sync signal is counted
The line direction useful signal is counted (Hdisplay): the counting of the actual line direction that comprises video data
The field direction useful signal is counted (Vdisplay): the counting of the actual field direction that comprises video data
Line frequency (Hfreq): p.s. display line number of times
Field frequency (Vfreq): p.s. display field number of times
Point is (PClk) frequently: what imported p.s. always counts
These variable relations can be put out following formula in order:
The signal of line frequency=field frequency * field direction is counted
The signal of the some frequency=line direction signal of the * line frequency=line direction signal of the * field direction * field frequency of counting of counting of counting;
Two, display apparatus processes principle
Display device picture processing chip (Scalar) is the critical elements that display device carries out image stretch and convergent-divergent processing.The Scalar of main flow is based on line cache structure (term Line Buffer promptly imports the instant treatment technology that delegation's signal data shows data line) basically at present, and the image zoom mechanism of this framework has following 3 points:
The counting of every row when 1) setting output carried out convergent-divergent by the display device picture processing chip to line and handled;
2) field direction being carried out convergent-divergent according to aspect ratio handles;
3) field frequency of the field frequency of input and output is consistent;
As shown in Figure 2;
Principle of work by picture processing chip can obtain following formula:
The field frequency of the field frequency=output of input
The field direction useful signal that the signal of the field direction of output is counted/exported is counted
The field direction useful signal that the signal of the field direction of=input is counted/imported is counted
The output point frequency: what per second was exported always counts
Can know by above-mentioned general formula:
The count line frequency of * output of the signal of the line direction of output point frequency=output
The signal of line direction of=output the count field frequency of * output of the signal of field direction of * output of counting
The signal of the line direction of=output field direction useful signal that the field direction useful signal of line frequency * output of * input counts/import of counting is counted;
Three, existing way and defective thereof
Liquid crystal display has carried out standard to its receivable scope of frequently counting with the signal of line direction in its product specification, the picture processing chip end must satisfy its standard when the output signal, avoids that designing does not match and cause bad.Since point frequently with the signal of the line direction proportional example relation of counting, the signal of line direction counted be set in the acceptable minimum value of liquid crystal display so according to design experiences, export the specification requirement that meets liquid crystal display frequently with guarantee point.
But maturing along with the display commodity; It is more and more that client requires the resolution format of support on the one hand; Liquid crystal display producer is also in continuous cost squeeze on the other hand; The parameter area more and more narrow that it is suitable for, so original signal parameter disposal route can not satisfy the matching design of existing LCD screen, the method that needs a kind of dynamic adjustment signal parameter to handle solves this problem.
Summary of the invention
The object of the present invention is to provide a kind of high-efficiency reliable dynamically to set the method for display device output parameter, avoid the bad generation of liquid crystal display matching.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of method of dynamic setting display device output parameter; It is characterized in that after calculating the output point frequency; Before the set-up register output parameter, increase the dynamic parameter adjusting module; Output point scope is frequently judged, and is suitably adjusted signal parameter, include following steps to meet the specification requirement of liquid crystal display:
1) the output point judgement of scope frequently: with output point frequently with liquid crystal display point frequently the scope of specification compare, be divided into A) output point frequently in specification, reasonable numerical value; B) output point is frequently in liquid crystal display point frequency specification, unreasonable numerical value;
2) output point adjustment process frequently: when display device switches output point frequently the time, detect output point rationality frequently automatically, if output point frequency value is unreasonable, then to output point frequently, the input field direction is effectively counted and export the line direction signal and count and adjust as follows,
A) when being lower than liquid crystal display point frequently, output point prescribes a time limit under the specification frequently,
Fixedly output point is liquid crystal display point frequency specification lower limit frequently, and the input field direction is effectively counted constant, and the signal that calculates the line direction of output with algorithm for inversion is counted;
When counting in the signal of the line direction that liquid crystal display defines is counted scope as if the signal that calculates the line direction of output, then parameter setting is accomplished and the output signal; Otherwise, if when surpassing the signal of the line direction of liquid crystal display definition and counting scope, the signal that should be fixed in the line direction of the liquid crystal display definition maximal value of counting, and calculate the input field direction with algorithm for inversion and effectively count, parameter setting is accomplished also output signal;
B) when output point is higher than liquid crystal display point frequency upper specification limit frequently,
Fixedly output point is liquid crystal display point frequency upper specification limit value frequently, and the signal of the line direction of output is counted constant, calculates input picture field direction with algorithm for inversion and effectively counts;
If the input picture field direction that calculates is effectively counted in reasonable setting range, promptly its numerical value is counted less than the field direction signal and is deducted the field direction synchronizing signal and count, and then parameter setting is accomplished and the output signal; Otherwise, if its numerical value is not in the reasonable scope, then output point is counted with the output line direction frequently and be set at representative value setup parameter and the output in the liquid crystal display specification, this resolution of popup menu prompting client can't show.
Beneficial effect of the present invention is: through the judgement to the output point frequency; Dynamic calculating and the adjustment display parameter; Increased the matching that liquid crystal display is designed and developed; The signal parameter detection module of normalise simultaneously provides a kind of Design Mode efficiently, has avoided because the artificial leakage of designer causes the poorly designed possibility of signal parameter.
Description of drawings
Fig. 1 is the video display parameters synoptic diagram that VESA formulates;
Fig. 2 is the principle of work synoptic diagram of picture processing chip;
Fig. 3 is realization flow figure of the present invention.
Embodiment
In order to understand the present invention better, further illustrate content of the present invention below in conjunction with embodiment, but the present invention not only is confined to this.
A kind of method of dynamic setting display device output parameter: after calculating the output point frequency; Before the set-up register output parameter, increase the dynamic parameter adjusting module; Output point scope is frequently judged, and is suitably adjusted signal parameter, include following steps to meet the specification requirement of liquid crystal display:
1) the output point judgement of scope frequently: with output point frequently with liquid crystal display point frequently the scope of specification compare, be divided into A) output point frequently in specification, reasonable numerical value; B) output point is frequently in liquid crystal display point frequency specification, unreasonable numerical value;
2) output point adjustment process frequently: when display device switches output point frequently the time, detect output point rationality frequently automatically, if output point frequency value is unreasonable, then to output point frequently, the input field direction is effectively counted and export the line direction signal and count and adjust as follows,
A) when being lower than liquid crystal display point frequently, output point prescribes a time limit under the specification frequently,
Fixedly output point is liquid crystal display point frequency specification lower limit frequently, and the input field direction is effectively counted constant, and the signal that calculates the line direction of output with algorithm for inversion is counted;
When counting in the signal of the line direction that liquid crystal display defines is counted scope as if the signal that calculates the line direction of output, then parameter setting is accomplished and the output signal; Otherwise, if when surpassing the signal of the line direction of liquid crystal display definition and counting scope, the signal that should be fixed in the line direction of the liquid crystal display definition maximal value of counting, and calculate the input field direction with algorithm for inversion and effectively count, parameter setting is accomplished also output signal;
B) when output point is higher than liquid crystal display point frequency upper specification limit frequently,
Fixedly output point is liquid crystal display point frequency upper specification limit value frequently, and the signal of the line direction of output is counted constant, calculates input picture field direction with algorithm for inversion and effectively counts;
If the input picture field direction that calculates is effectively counted in reasonable setting range, promptly its numerical value is counted less than the field direction signal and is deducted the field direction synchronizing signal and count, and then parameter setting is accomplished and the output signal; Otherwise, if its numerical value is not in the reasonable scope, then output point is counted with the output line direction frequently and be set at representative value setup parameter and the output in the liquid crystal display specification, this resolution of popup menu prompting client can't show.
According to software realization flow figure shown in Figure 3; Because dynamically the adjustment function has been realized modularization; So the prior art staff only needs after software calculates the output point frequency at present, before setting phaselocked loop register output parameter, to increase this dynamic parameter adjusting module and get final product.
Embodiment 1; Mate strange beautiful MT200LW02 model liquid crystal display; Liquid crystal display specification point frequently scope 97Mhz to 152Mhz, the line direction signal scope 1930 to 2300 of counting, exporting that the line direction useful signal counts is 1600; It is 900 that output field direction useful signal is counted, and it is 1930 that default setting output line direction signal is counted.When input signal was 576P (720*57650hz), then output point was lower than liquid crystal display point lower limit 97Mhz frequently for 1930*31250*900/576=94.23Mhz frequently; After increasing the dynamic parameter adjusting module; After judging that this output point is lower than liquid crystal display point frequency lower limit frequently; Fixedly output point is liquid crystal display point frequency lower limit 97Mhz frequently; The signal that algorithm for inversion calculates the line direction of output count for 97000000/31250/900*576=1986 in liquid crystal display line direction signal is counted scope, directly setup parameter is also exported signal, measures to export signaling point this moment and meet the liquid crystal display specification for 97Mhz frequently.
Embodiment 2; The coupling B156XW02 of Youda model liquid crystal display; Liquid crystal display specification point frequently scope 65Mhz to 85Mhz, the line direction signal scope 1396 to 2047 of counting, exporting that the line direction useful signal counts is 1366; It is 768 that output field direction useful signal is counted, and it is 1396 that default setting output line direction signal is counted.When input signal was 800*60072hz, then output point was higher than liquid crystal display point upper limit 85Mhz frequently for 1396*48077*768/600=85.9Mhz frequently; After increasing the dynamic parameter adjusting module; After judging that changing output point is higher than the liquid crystal display point frequency upper limit frequently; Fixedly output point is liquid crystal display point frequency lower limit 85Mhz frequently; Algorithm for inversion calculates the input picture field direction 48077*1396*768/85000000=606 that effectively counts, judge input picture field direction effectively count 606 less than the field direction signal count deduct the field direction synchronizing signal count (666 – 6=660) be useful signal, directly setup parameter is also exported signal; Measurement is exported signaling point at this moment and is met the liquid crystal display specification for 85Mhz frequently, and 800*60072Hz dynamically compresses at the enterprising row of field direction when showing.
It is illustrative more than describing specific embodiment of the present invention; Rather than be used for the qualification of scope of the present invention; Those of ordinary skill in the art are in the modification and the variation of the equivalence of being done according to the present invention spirit, all should be encompassed in the scope that claim of the present invention protects.
Claims (1)
1. method of dynamically setting the display device output parameter; It is characterized in that after calculating the output point frequency; Before the set-up register output parameter, increase the dynamic parameter adjusting module; Output point scope is frequently judged, and is suitably adjusted signal parameter, include following steps to meet the specification requirement of liquid crystal display:
1) the output point judgement of scope frequently: with output point frequently with liquid crystal display point frequently the scope of specification compare, be divided into A) output point frequently in specification, reasonable numerical value; B) output point is frequently in liquid crystal display point frequency specification, unreasonable numerical value;
2) output point adjustment process frequently: when display device switches output point frequently the time, detect output point rationality frequently automatically, if output point frequency value is unreasonable, then to output point frequently, the input field direction is effectively counted and export the line direction signal and count and adjust as follows,
A) when being lower than liquid crystal display point frequently, output point prescribes a time limit under the specification frequently,
Fixedly output point is liquid crystal display point frequency specification lower limit frequently, and the input field direction is effectively counted constant, and the signal that calculates the line direction of output with algorithm for inversion is counted;
When counting in the signal of the line direction that liquid crystal display defines is counted scope as if the signal that calculates the line direction of output, then parameter setting is accomplished and the output signal; Otherwise, if when surpassing the signal of the line direction of liquid crystal display definition and counting scope, the signal that should be fixed in the line direction of the liquid crystal display definition maximal value of counting, and calculate the input field direction with algorithm for inversion and effectively count, parameter setting is accomplished also output signal;
B) when output point is higher than liquid crystal display point frequency upper specification limit frequently,
Fixedly output point is liquid crystal display point frequency upper specification limit value frequently, and the signal of the line direction of output is counted constant, calculates input picture field direction with algorithm for inversion and effectively counts;
If the input picture field direction that calculates is effectively counted in reasonable setting range, promptly its numerical value is counted less than the field direction signal and is deducted the field direction synchronizing signal and count, and then parameter setting is accomplished and the output signal; Otherwise, if its numerical value is not in the reasonable scope, then output point is counted with the output line direction frequently and be set at representative value setup parameter and the output in the liquid crystal display specification, this resolution of popup menu prompting client can't show.
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Cited By (1)
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| CN105681699A (en) * | 2016-01-15 | 2016-06-15 | 四川长虹电器股份有限公司 | Control method and device of LVDS (Low-Voltage Differential Signaling) data clock of liquid crystal display television |
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