CN102510517A - Method for testing and debugging image hierarchy expression capability of plasma television - Google Patents
Method for testing and debugging image hierarchy expression capability of plasma television Download PDFInfo
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- CN102510517A CN102510517A CN2011103451428A CN201110345142A CN102510517A CN 102510517 A CN102510517 A CN 102510517A CN 2011103451428 A CN2011103451428 A CN 2011103451428A CN 201110345142 A CN201110345142 A CN 201110345142A CN 102510517 A CN102510517 A CN 102510517A
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Abstract
The invention is suitable for the technical field of the television display, and provides a method for testing and debugging the image hierarchy expression capability of a plasma television. The method comprises the following steps of: making a plurality of test images which respectively represent different white field levels, wherein each test image is added with a N-scale gray scale strip image, and N is a natural number more than 1; respectively playing each test image on the television; measuring the luminance value bi of each gray scale strip in the image under each test image; calculating the luminance difference Pi of every two adjacent gray scales, wherein Pi is equal to bi-bi-1, and i is equal to 1, 2,...15; and regulating the dynamic luminance control system of a tested television movement according to Pi. In the method, the luminance of the gray scale of the plasma television under different test images is tested and the luminance difference Pi is obtained to objectively and accurately test and judge the image hierarchy expression capability of the plasma television, a DLC (Dynamic Luminance Control) system is regulated according to the index, and thus, the integral image hierarchy expression capability of a screen and the movement reaches a higher level.
Description
Technical field
the invention belongs to the television display technology field, relate in particular to a kind of test and adjustment method of plasm TV image level expressive ability.
Background technology
The image level of
TV is a very important part in test and appraisal of TV image quality and the debugging, and image level mainly comprises the colored level and the level of gray scale.Because human eye to the difference of color and brightness susceptibility, in the test and appraisal debugging of image quality and on the subjective sensation, mainly is that the level of gray scale is bigger to the actual effect influence.
to the comparison of different plasm TV image level expressive abilities, mainly there are following three problems in prior art: the one, and it is comparatively subjective to test and assess, and arbitrarily degree is bigger under the different people varying environment; The 2nd, it is more rough to test and assess, and two states is only distinguished or is hard to tell in the judgement of different gray-levels, not enough to the discrimination of different type of machines expressive force; The 3rd, (Average Picture-signal Level APL), mainly shows as under the different mean flow rates of screen the average picture level that the plasma electric apparent is different; Based on the consideration of power controlling, screen can shield overall brightness with the Different Dynamic ground adjustment of real-time APL, and movement is based on the consideration of optimizing details in a play not acted out on stage, but told through dialogues and bright field expressive force; One cover dynamic brightness control (Dynamic Luminance Control is arranged; DLC) system under the comprehensive function of screen and movement, finally shows as TV and when high APL, can turn down brightness; When hanging down APL, can heighten brightness; The different brightness curve is arranged under the different APL, and therefore the image level expressive ability difference of TV is also very big under different APL, and existing being difficult in accomplishes under the different APL to test objectively and debug.
Summary of the invention
the objective of the invention is to: test and adjustment method that a kind of plasm TV image level expressive ability is provided; It is comparatively subjective, rough to be intended to solve existing test for different plasm TV image level expressive abilities, and the problem that under different APL, is difficult to objective examination and debugging.
The objective of the invention is to realize like this:
A kind of method of testing of plasm TV image level expressive ability, said method comprises:
Make several and represent different white other test patterns of level respectively, all be added with the GTG bar image on N rank in every width of cloth test pattern, N is the natural number greater than 1;
On television set, play each width of cloth test pattern respectively, under every width of cloth test pattern, record the brightness value b on the every rank of GTG bar in the image
i
Calculate the luminance difference P of per two adjacent GTGs
i
=b
i
-b
I-1
, i=1,2 ..., 15, according to P
i
Judge the image level expressive ability of this tested television set.
The width maximum of
GTG bar is no more than 1/10th of test pattern width; Minimum being as the criterion by the optic test complete test of popping one's head in; Length is identical with test pattern; N is more than or equal to 16, and the position of GTG bar in every width of cloth test pattern is provided with arbitrarily, the GTG bar in each width of cloth test pattern big or small identical.
television set shows that the pattern of test pattern is a screen mode toggle.
For same tested television set, calculating said P
i
After, further calculate its P under every width of cloth test pattern
i
Mean value A (P
i
), and according to A (P
i
) judge the general image level expressive force of this tested television set.
For same tested television set, calculating said P
i
After, further calculate its P under every width of cloth test pattern
i
Variance D (P
i
), and according to D (P
i
) judge the uniformity of the image level expressive force of this tested television set.
are tested for one that chooses in its video channel that has for same television set to be measured, perhaps choose wherein several or all test respectively.
Another object of the present invention is to: a kind of test and adjustment method of plasm TV image level expressive ability are provided, and said method comprises:
Make several and represent different white other test patterns of level respectively, all be added with the GTG bar image on N rank in every width of cloth test pattern, N is the natural number greater than 1;
On television set, play each width of cloth test pattern respectively, under every width of cloth test pattern, record the brightness value b on the every rank of GTG bar in the image
i
Calculate the luminance difference P of per two adjacent GTGs
i
=b
i
-b
I-1
, i=1,2 ..., 15, according to P
i
Adjust the dynamic brightness control system of this tested Core of TV set.
For same tested television set, calculating said P
i
After, further calculate its P under every width of cloth test pattern
i
Mean value A (P
i
), and according to P
i
And/or A (P
i
) adjust the dynamic brightness control system of this tested Core of TV set.
For same tested television set, calculating said P
i
After, further calculate its P under every width of cloth test pattern
i
Variance D (P
i
), and according to P
i
, A (P
i
) and D (P
i
) adjust the dynamic brightness control system of this tested Core of TV set.
The width maximum of
GTG bar is no more than 1/10th of test pattern width; Minimum being as the criterion by the optic test complete test of popping one's head in; Length is identical with test pattern; N is more than or equal to 16, and the position of GTG bar in every width of cloth test pattern is provided with arbitrarily, the GTG bar in each width of cloth test pattern big or small identical.
Outstanding advantage of the present invention is: the present invention adopts a different white rank to add the GTG bar as test pattern, and the brightness of testing plasma television set GTG under different test patterns also obtains luminance difference P
i
, and A (P
i
) and D (P
i
) these quantizating index; Objective, the test judgement accurately of the image level expressive ability of article on plasma television set have been realized; And can make screen and this whole image level expressive ability of movement reach a level preferably according to the DLC system of these indexs through the adjustment movement.
Description of drawings
Fig. 1 is 0% white, 40% white, the 100% white test pattern after the match that the embodiment of the invention provides;
Fig. 2 is 0% white P that adds the following 3 kinds of types of test pattern of GTG bar that the embodiment of the invention provides
i
Curve chart;
Fig. 3 is 40% white P that adds the following 3 kinds of types of test pattern of GTG bar that the embodiment of the invention provides
i
Curve chart;
Fig. 4 is the brightness curve sketch map of the DLC system that provides of the embodiment of the invention.
Embodiment
in order to make the object of the invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and embodiment, are further elaborated to the present invention.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
are owing to the image level expressive ability difference of TV under different APL is also very big; The embodiment of the invention is at first made different white other test patterns of level respectively according to different APL; For example make 0% white, 10% white, 20% white ..., 100% (can certainly be 0% white, 20% white, 40% white ..., 100% etc.) ten width of cloth images under the white background; Representing the state of the different APL values of plasm TV respectively, and in the every width of cloth test pattern GTG bar image on N rank of adding.Promptly show 0% white, 40% white, the 100% white test pattern after the match that one embodiment of the present of invention provide from left to right respectively like Fig. 1, GTG bar exponent number N is 16 among the figure.
In
test pattern; The width maximum of GTG bar should not surpass 1/10th of test pattern width; Minimum length is identical with test pattern being as the criterion by the optic test complete test of popping one's head in, and N can be any natural number greater than 1; But being excellent more than or equal to 16, and the big more test effect of N is accurate more.The position of GTG bar in every width of cloth test pattern can be provided with arbitrarily according to the test needs, but the size of GTG bar should be identical among each figure.
in embodiments of the present invention, television set to be measured is tested respectively under every width of cloth test pattern.On television set to be measured, play the test pattern of above-mentioned adding GTG bar through player, each rank output amplitude of GTG bar must be calibrated with standard signal generator, and TV shows that the pattern of test pattern is a screen mode toggle.
are through the brightness on the every rank of GTG bar in the optic test probe test images displayed.With N is 16 to be example, and the brightness value that records different GTGs under the current test pattern is respectively b
0
, b
1
, b
2
B
15
, calculate the luminance difference P of per two adjacent GTGs
i
=(b
i
-b
I-1
) (i=1,2 ..., 15), wherein i represents different gray scales, and i more greatly then gray scale is high more, P
i
Value has been represented the image level expressive force of this tested television set at different gray scales, through to P
i
The analysis of value promptly can be judged the image level expressive ability of this tested television set, P
i
It is strong more in the image level expressive force of this gray scale to be worth high more then this tested television set.
Fig. 2, Fig. 3 show respectively and add GTG bar, 40% white in 0% white field and add under the test pattern of GTG bar, and the television set of 3 different type of machines is tested the P of gained respectively
i
Curve among the figure, laterally is the i value, vertically is P
i
Value.
As shown in Figure 2, under middle gray scale (i=8), the P of type 1
8
=1.53, the P of type 2
8
=1.95, the P of type 3
8
=1.02, visible under this low APL state (0% white), the image presentation ability of the middle gray scale of type 2 is better than type 1 and type 3; And under high brightness level (i=15), the P of type 1
15
=0.71, the P of type 2
15
=0.18, the P of type 3
15
=0.88, visible under this low APL state, other image appearance ability of the high brightness levels of type 2 is lower than type 1 and type 3.
Because high-high brightness (peak brightness and white brightness) the absolute value difference of the TV screen of different type of machines is bigger; The inevitable difference of its brightness curve is also big; Even the screen high-high brightness is the same; Also be difficult to weigh the consistency and the otherness (difference of image level expressive ability) of different brightness curves, and pass through P
i
Value evaluation can be evaded the difference of this absolute value, can embody the conforming difference of its image level expressive ability again quantitatively.
For can be more objective, test evaluation plasm TV image level expressive ability exactly, as a preferred embodiment of the present invention,, calculating P for same tested television set
i
After, can further calculate its P under every width of cloth test pattern
i
Mean value A (P
i
), A (P
i
) represented the average level of the image level expressive force of this tested television set, A (P
i
) value high more then this tested television set general image level expressive force high more.A (the P of same tested television set under the white rank of difference
i
) be different, the different A (Ps of this tested television set under the white rank of difference
i
) value, represented its image appearance ability under different APL respectively.
As shown in Figure 2, add under the GTG bar picture state A (P of type 1 at 0% white
i
)=1.46, the A (P of type 2
i
)=1.31, the A (P of type 3
i
)=1.05; And add under the GTG bar picture state at 40% white, as shown in Figure 3, the A (P of type 1
i
)=1.21, the A (P of type 2
i
)=1.07, the A (P of type 3
i
)=1.28.With type 3 is example, and visible its image level expressive ability is minimum in three types under low APL state, and under medium APL state (40% white), its image level expressive ability is the highest in three types; And type 3 is higher than its image appearance ability under low APL state in the image appearance ability under the medium APL state.
In a preferred embodiment of the invention, can also further calculate P
i
Variance D (P
i
), D (P
i
) represented the uniformity of the image level expressive ability of tested television set at different gray scales, D (P
i
) uniformity of image level expressive ability of more little then this tested television set is good more.
As shown in Figure 3, add under the GTG bar picture state D (P of type 1 at 40% white
i
)=0.043, the D (P of type 2
i
)=0.341, the D (P of type 3
i
)=0.049, the uniformity of visible type 1 and type 3 is better, and the uniformity of type 2 is relatively poor.
are for same television set to be measured; Can under a plurality of different video channels such as HDMI passage, component channel, AV passage, S terminal channel, USB passage, carry out test evaluation respectively; Also can only choose one of them or several video channel commonly used is carried out test evaluation, this can be decided according to concrete type.
in above-mentioned test process, every kind of type has only been chosen a television set and has been tested, because the image appearance capacity variance of the different plasma TVs of same model is very little.Certainly, also can choose the multiple TV set of same model and test, can average to above-mentioned each item index of this multiple TV set this moment and judge again.
If desired tested television set is debugged, then state method of testing on the implementation after, with P
i
, A (P
i
) and D (P
i
) be index, the DLC system of movement of adjustment different type of machines makes screen and this whole image level expressive ability to of movement level preferably, can guarantee the consistency of its image level expressive ability preferably.Certainly, also can be only with P
i
, perhaps P
i
And A (P
i
) debug for index.Said DLC system is that dynamically the brightness curve of system and the screen of adjustment is relatively independent to brightness curve under the different APL on the movement, can make screen and this whole image level expressive ability of movement reach a level preferably through the adjustment to the DLC system.Promptly show the brightness curve of DLC system like Fig. 4, brightness curve when brightness curve and high APL when brightness curve, medium APL when entire curve is divided into low APL.During adjustment, be example with type 1, through above-mentioned test, to type 1 more weak characteristic of image appearance power when the low APL, the brightness curve (part of enclosing among Fig. 4) in the time of can adjusting the low APL of DLC system, the increase slope of curve improves its expressive force.
Under the perfect condition, the P of same television set under same test pattern
i
Should be in full accord, and the P under the low APL state
i
Should be higher than the P under the high APL state
i
Can only make the These parameters of television set level off to said perfect condition through adjustment DLC system in the actual debugging.Since in above-mentioned test judgement and debug process, not do not unify, can well-determined reference index value; In embodiments of the present invention; Can obtain its each item desired value through test pattern level expressive ability model machine preferably, to judge as the test of this type and reference during debugging.
The embodiment of the invention adopts a different white rank to add the GTG bar as test pattern, and the brightness of testing plasma television set GTG under different test patterns also obtains luminance difference P
i
, and A (P
i
) and D (P
i
) these quantizating index; Objective, the test judgement accurately of the image level expressive ability of article on plasma television set have been realized; And can make screen and this whole image level expressive ability of movement reach a level preferably according to the DLC system of these indexs through the adjustment movement.
the above is merely preferred embodiment of the present invention; Not in order to restriction the present invention; All any modifications of within spirit of the present invention and principle, being done, be equal to replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the method for testing of a plasm TV image level expressive ability is characterized in that, said method comprises:
Make several and represent different white other test patterns of level respectively, all be added with the GTG bar image on N rank in every width of cloth test pattern, N is the natural number greater than 1;
On television set, play each width of cloth test pattern respectively, under every width of cloth test pattern, record the brightness value b on the every rank of GTG bar in the image
i
Calculate the luminance difference P of per two adjacent GTGs
i=b
i-b
I-1, i=1,2 ..., 15, according to P
iJudge the image level expressive ability of this tested television set.
2. the method for testing of plasm TV image level expressive ability as claimed in claim 1; It is characterized in that the width maximum of GTG bar is no more than 1/10th of test pattern width, minimum being as the criterion by the optic test complete test of popping one's head in; Length is identical with test pattern; N is more than or equal to 16, and the position of GTG bar in every width of cloth test pattern is provided with arbitrarily, the GTG bar in each width of cloth test pattern big or small identical.
3. the method for testing of plasm TV image level expressive ability as claimed in claim 1 is characterized in that, television set shows that the pattern of test pattern is a screen mode toggle.
4. the method for testing of plasm TV image level expressive ability as claimed in claim 1 is characterized in that, for same tested television set, is calculating said P
iAfter, further calculate its P under every width of cloth test pattern
iMean value A (P
i), and according to A (P
i) judge the general image level expressive force of this tested television set.
5. the method for testing of plasm TV image level expressive ability as claimed in claim 1 is characterized in that, for same tested television set, is calculating said P
iAfter, further calculate its P under every width of cloth test pattern
iVariance D (P
i), and according to D (P
i) judge the uniformity of the image level expressive force of this tested television set.
6. the method for testing of plasm TV image level expressive ability as claimed in claim 1; It is characterized in that; For same television set to be measured, test for one that chooses in its video channel that has, perhaps choose wherein several or all test respectively.
7. the test and the adjustment method of a plasm TV image level expressive ability is characterized in that, said method comprises:
Make several and represent different white other test patterns of level respectively, all be added with the GTG bar image on N rank in every width of cloth test pattern, N is the natural number greater than 1;
On television set, play each width of cloth test pattern respectively, under every width of cloth test pattern, record the brightness value b on the every rank of GTG bar in the image
i
Calculate the luminance difference P of per two adjacent GTGs
i=b
i-b
I-1, i=1,2 ..., 15, according to P
iAdjust the dynamic brightness control system of this tested Core of TV set.
8. the test and the adjustment method of plasm TV image level expressive ability as claimed in claim 7 is characterized in that, for same tested television set, are calculating said P
iAfter, further calculate its P under every width of cloth test pattern
iMean value A (P
i), and according to P
iAnd/or A (P
i) adjust the dynamic brightness control system of this tested Core of TV set.
9. the test and the adjustment method of plasm TV image level expressive ability as claimed in claim 8 is characterized in that, for same tested television set, are calculating said P
iAfter, further calculate its P under every width of cloth test pattern
iVariance D (P
i), and according to P
i, A (P
i) and D (P
i) adjust the dynamic brightness control system of this tested Core of TV set.
10. the test and the adjustment method of plasm TV image level expressive ability as claimed in claim 7; It is characterized in that the width maximum of GTG bar is no more than 1/10th of test pattern width, minimum being as the criterion by the optic test complete test of popping one's head in; Length is identical with test pattern; N is more than or equal to 16, and the position of GTG bar in every width of cloth test pattern is provided with arbitrarily, the GTG bar in each width of cloth test pattern big or small identical.
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|---|---|---|---|
| CN 201110345142 CN102510517B (en) | 2011-11-04 | 2011-11-04 | Method for testing and debugging image hierarchy expression capability of plasma television |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110345142 CN102510517B (en) | 2011-11-04 | 2011-11-04 | Method for testing and debugging image hierarchy expression capability of plasma television |
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| Publication Number | Publication Date |
|---|---|
| CN102510517A true CN102510517A (en) | 2012-06-20 |
| CN102510517B CN102510517B (en) | 2013-11-06 |
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ID=46222566
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|---|---|---|---|
| CN 201110345142 Expired - Fee Related CN102510517B (en) | 2011-11-04 | 2011-11-04 | Method for testing and debugging image hierarchy expression capability of plasma television |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106791820A (en) * | 2016-12-28 | 2017-05-31 | 北京泰瑞特检测技术服务有限责任公司 | A kind of gray scale adjusting means of television set limit eight and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003177697A (en) * | 2001-12-12 | 2003-06-27 | Mitsubishi Electric Corp | Video display device |
| CN1588513A (en) * | 2004-08-05 | 2005-03-02 | 康佳集团股份有限公司 | Driving control method for increasing low grey degree value picture details |
| CN1750090A (en) * | 2005-10-14 | 2006-03-22 | 彩虹集团电子股份有限公司 | Method for improving dark field image quality of color plasma display screen |
| JP2007279213A (en) * | 2006-04-04 | 2007-10-25 | Sharp Corp | Luminance inspecting device for display panel, and display panel manufacturing method using the same |
-
2011
- 2011-11-04 CN CN 201110345142 patent/CN102510517B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003177697A (en) * | 2001-12-12 | 2003-06-27 | Mitsubishi Electric Corp | Video display device |
| CN1588513A (en) * | 2004-08-05 | 2005-03-02 | 康佳集团股份有限公司 | Driving control method for increasing low grey degree value picture details |
| CN1750090A (en) * | 2005-10-14 | 2006-03-22 | 彩虹集团电子股份有限公司 | Method for improving dark field image quality of color plasma display screen |
| JP2007279213A (en) * | 2006-04-04 | 2007-10-25 | Sharp Corp | Luminance inspecting device for display panel, and display panel manufacturing method using the same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106791820A (en) * | 2016-12-28 | 2017-05-31 | 北京泰瑞特检测技术服务有限责任公司 | A kind of gray scale adjusting means of television set limit eight and method |
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|---|---|
| CN102510517B (en) | 2013-11-06 |
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