CN103813116A - Adjusting method, adjusting device, light machine and screen splicing wall system - Google Patents
Adjusting method, adjusting device, light machine and screen splicing wall system Download PDFInfo
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- CN103813116A CN103813116A CN201210562883.6A CN201210562883A CN103813116A CN 103813116 A CN103813116 A CN 103813116A CN 201210562883 A CN201210562883 A CN 201210562883A CN 103813116 A CN103813116 A CN 103813116A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/3147—Multi-projection systems
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
- G06F3/1446—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display display composed of modules, e.g. video walls
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3179—Video signal processing therefor
- H04N9/3182—Colour adjustment, e.g. white balance, shading or gamut
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/02—Composition of display devices
- G09G2300/026—Video wall, i.e. juxtaposition of a plurality of screens to create a display screen of bigger dimensions
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
Abstract
The invention provides an adjusting method, an adjusting device, a light machine and a screen splicing wall system. The adjusting method, the adjusting device, the light machine and the screen splicing wall system are used for screen splicing wall. The screen splicing wall is formed by at least two display units in a splicing mode. According to the adjusting method, the adjusting device, the light machine and the screen splicing wall system, a light adjusting coefficient of every position inside a reserved adjacent area and input image signals of the screen splicing wall are obtained and the input image signals are adjusted through the light adjusting coefficients to obtain new input image signals, so that the screen splicing wall can display through the new image signals conveniently, brightness and color distribution of the adjacent area being in uniform response or gradually varied response which do not cause mutational feels is achieved, and meanwhile the brightness and the color in non-adjacent area are not changed, accordingly the screen splicing wall is guaranteed having a good splicing display effect and meanwhile being high in brightness.
Description
Technical field
The present invention relates to field of projection display, particularly a kind of method of adjustment, adjusting device, ray machine and screen are spelled wall system.
Background technology
Along with the development of projection display technique, large scale display is all the more by people are favored.No matter for the projection screen of Projection Display, or LCDs or LED display, in order to realize the demonstration of large-screen, conventionally plural display unit need to be spliced.During by multiple display unit splicing, due to the difference between each display unit, at the seam crossing of adjacent two display units, can there is the sudden change of brightness and color, affect overall visual effect.
In order to make the brightness on the whole of spliced screen spelling wall even as far as possible, current solution is: the picture signal (such as pure white image or pure red image) of a given width uniform luminance and color, the brightness uniformity of demarcating screen distributes, find wherein the darkest region, then by the processing to picture signal or the processing to light source, the luminance level that reduces other region makes its brightness that reaches the darkest region, even to realize the brightness of whole screen.
Obviously, the problem of this method is the decline of display brightness.And in the time that this method is applied to screen spelling wall, the brightness of each display unit must be adjusted as benchmark using the darkest region in all unit, the brightness that could realize whole spelling wall is identical with color.Spell wall display unit used more, the possibility that brightness declines is larger.
Summary of the invention
Find through deeply thinking deeply us, spell wall for screen, do not need the brightness of all display units and color to be all adjusted to identical, and as long as guarantee that adjacent display cell can guarantee the display effect of whole spelling wall in the brightness of seam crossing and the even or slow gradual change of color.All even gradual changes of indication of the present invention, all refer to the evaluation to shown picture signal under the condition of the even picture signal of input.
The technical problem that the present invention solves is, under the prerequisite of the good display effect of assurance, to reduce the decline of screen spelling wall brightness as far as possible.
The present invention proposes a kind of method of adjustment, is applied to screen and spells wall, and this screen is spelled wall and is closely stitched together by least two screen display unit, and this method of adjustment comprises:
Obtain the light of each position in predetermined adjacent area and adjust coefficient, this adjacent area cover screen is spelled all seams of wall, and light is adjusted image that coefficient makes adjacent area and shown that for the response of input signal be uniform response or gradual change response that can mutagenesis sense;
Obtain screen and spell the received image signal of wall;
Adopt light to adjust coefficient received image signal adjustment is obtained to new received image signal, show with this new received image signal so that screen is spelled wall; Or adopt light adjustment coefficient to adjust and obtain new light source driving parameter the light source driving parameter obtaining according to received image signal, so that spelling wall, screen drive driving parameter light source to show with this new light source.
The present invention also proposes a kind of method of adjustment, is applied to screen and spells wall, and this screen is spelled wall and is closely stitched together by least two screen display unit, and screen is spelled wall can show at least three kinds of primary lights, the first primary lights, the second primary lights and three primary colors light, comprise the following steps:
Application is adjusted the first primary colours uniformity of light according to above-mentioned method of adjustment;
Application is adjusted the second primary colours uniformity of light according to above-mentioned method of adjustment;
Application is adjusted three primary colors uniformity of light according to above-mentioned method of adjustment.
The present invention also proposes a kind of adjusting device, is applied to screen and spells wall, and this screen is spelled wall and is closely stitched together by least two screen display unit, and this adjusting device comprises:
The first acquisition module, adjust coefficient for the light that obtains each position in predetermined adjacent area, adjacent area cover screen is spelled all seams of wall, and light is adjusted image that coefficient makes adjacent area and shown that for the response of input signal be uniform response or gradual change response that can mutagenesis sense;
The second acquisition module, for obtaining the received image signal of screen spelling wall;
Adjusting module, obtains new received image signal for adopting light to adjust coefficient to received image signal adjustment, shows with this new received image signal so that screen is spelled wall; Or for adopting light to adjust coefficient, the light source driving parameter obtaining according to received image signal is adjusted and obtained new light source driving parameter, so that spelling wall, screen drive driving parameter light source to show with this new light source.
The present invention also proposes a kind of ray machine, spells wall for screen, comprises above-mentioned adjusting device.
The present invention also proposes a kind of screen and spells wall system, comprises screen spelling wall, and screen is spelled wall and is closely stitched together by least two display screen units, and this system also comprises above-mentioned adjusting device.
Apply adjustment screen of the present invention and spell the inhomogeneity method of wall, can only adjust the screen intensity of adjacent area and color but not to adjust district constant, and then in realizing even display effect, keep the higher brightness of screen.
Accompanying drawing explanation
Fig. 1 is the package assembly schematic diagram that 2 × 2 screens are spelled wall;
Fig. 2 is the schematic diagram of the first embodiment of the present invention;
Fig. 3 is adjacent area and non-adjacent Division schematic diagram in single display unit;
Fig. 4 is the schematic diagram increasing in the first embodiment of the present invention behind buffering area;
Fig. 5 utilizes curve adjacent area luminosity response to be adjusted into the schematic diagram of slow gradual change;
Fig. 6 is the schematic diagram of the second embodiment of the present invention;
Fig. 7 is the schematic diagram of the third embodiment of the present invention;
Embodiment
For a better understanding of the present invention, the existing screen take 2 × 2 is spelled wall and each embodiment is specifically described as example.
Fig. 1 is the schematic diagram that 2 × 2 screens are spelled wall, is spliced by a, b, c, tetra-display units of d.Display unit can be projection screen, LED display and LCD display etc.Conventionally the brightness meeting of a, b, c, tetra-display units of d is inconsistent, and this inconsistent sudden change that the screen spelling wall that makes to be spliced is occurred to brightness at seam crossing, has affected the overall display effect of spelling wall.If at this moment find out the darkest region of brightness from whole spelling wall, then by the brightness regulation of whole screen to the identical uniformity that guarantees the brightness of whole spelling wall in this region, can greatly reduce undoubtedly the brightness that shows image.
For actual screen spell wall, in order to guarantee its overall display effect, do not need the brightness of all display units to be all adjusted to identical, as long as and adjacent display cell is not suddenlyd change in the brightness of seam crossing.To achieve these goals, first need spell and define within the walls adjacent area at screen, the luminosity response of then adjusting adjacent area be uniform response or gradual change response that can mutagenesis sense.Because the brightness in non-adjacent district is constant, be improved with respect to the display brightness of screen the traditional scheme that whole screen is all adjusted.In reality, conventional adjustment screen adjacent area luminosity response is that the method for uniform response or gradual change response is: the light of demarcating each position in adjacent area is adjusted coefficient, and adjusting coefficient according to this light, to adjust the brightness of adjacent area be that uniform response or gradual change that can mutagenesis sense respond.Thereby said gradual change response that can mutagenesis sense refers to intensity of variation and slowly can not cause discovering of people herein, and this intensity of variation is difficult to quantitative description, but the experiment that can watch by human eye in practice obtains.
Fig. 2 is the schematic diagram of first embodiment of the invention.In the present embodiment, adjust the inhomogeneity method of screen spelling wall and comprise the following steps 101-103:
Step 101 is obtained the light of each position in predetermined adjacent area and is adjusted coefficient, and adjacent area cover screen is spelled all seams of wall, and light is adjusted image that coefficient makes adjacent area and shown that for the response of input signal be uniform response or gradual change response that can mutagenesis sense.
Below first explain adjacent area.In the present embodiment, the screen for 2 × 2 is spelled wall, and it has cross seam, and defining its adjacent area is the cross region 21 that covers all seams and be distributed with certain width along seam both sides.If take spelling wall apart, defined adjacent area all will be distributed in the edge of each display unit, and take a display unit in Fig. 2 as example, its adjacent area is just distributed in its right and following edge.Border, adjacent area can be straight line, can be also irregular curve, spells all seams of wall and is distributed with certain width along seam both sides, as shown in Figure 3 as long as adjacent area has covered.Fig. 3 is the interior adjacent area of a display unit and non-adjacent Division schematic diagram in Fig. 2, and wherein 31 is adjacent area, and 32 is non-adjacent district, and 33 is adjacent area and border, non-adjacent district, and 34 is adjacent area width.In actual applications, the border between adjacent area and non-adjacent district is curve, can reduce human eye to the susceptibility of difference in brightness between the two, makes visual effect better.
The width of so-called adjacent area refers to: if adjacent area is distributed in the edge on certain limit in display unit, the distance of a bit extending to display unit internal vertical from the edge on this limit is exactly the width of adjacent area at this point.Obviously,, for the adjacent area of curved boundary, the width distribution of its adjacent area is different everywhere.In reality, the width of adjacent area can be selected as required flexibly.Preferably, width is no more than in the display unit at its place under this width 1/5 of the limit length of side.Under so-called this width, limit refers to limit parallel with this width in display unit, and when adjacent area is during along the minor face edge distribution of display unit, the long limit of display unit is exactly the affiliated limit of width of this adjacent area; Otherwise when adjacent area is during along the long limit edge distribution of display unit, the minor face of display unit is exactly limit under the width of this adjacent area.For example, in Fig. 2, limit Jiu Weichang limit L under the width of adjacent area 211, and under the width of adjacent area 212, limit is exactly minor face W.In display unit, remove the remainder behind adjacent area, be defined as non-adjacent district.
Spell wall for screen by more multi-aspect unit is spliced, seam by many anyhow crossing line form, now the adjacent area of definition also will cover and spells all seams of wall and have certain width distribution along seam both sides.But for each independently display unit, its inner abutment district is always distributed in its edge.Make the width of adjacent area be no more than limit under it the length of side 1/5, can guarantee that the area in all of its neighbor district only accounts for the fraction of whole screen spelling wall area, like this in the time that the brightness in adjacent area is adjusted, whole screen is spelled only has the brightness in fraction region to be dimmed within the walls, and entirety still has higher brightness.
Below explain the acquisition methods of the light adjustment coefficient of adjacent area.
Define behind adjacent area, then need the light of demarcating each position in adjacent area to adjust coefficient.Due to reason on optics, the image meeting of screen spelling wall actual displayed is different with the picture signal of input conventionally, that is to say that the diverse location of screen spelling wall is for the response difference of received image signal; So-called light is adjusted coefficient, is used for exactly the Image Adjusting of actual displayed to the calibration factor identical with needed picture signal.For example, if a part is excessively bright, need that the brightness value of this local picture signal is multiplied by one and be less than 1 calibration factor or be greater than 1 calibration factor divided by one the brightness value of picture signal is reduced, this picture signal just can obtain needed brightness after screen display; That is to say, the processing of light adjustment coefficient has compensated the part of former screen display and has crossed bright problem.The light adjustment coefficient of having demarcated can be stored in screen and spell in the not erasable memory in the control device of wall, can read at any time.
The calibration process that adjacent area light is adjusted coefficient can comprise the following steps:
1. the specific picture signal of input one width;
2. gather screen and spell the Luminance Distribution that wall shows this specific image signal;
3. determine a Benchmark brightness region according to gathered image information;
4. the light that calculates each position in adjacent area using the brightness in this Benchmark brightness region as benchmark is adjusted coefficient.
A kind ofly calculate light to adjust the method for coefficient as follows: establishing inputted specific image signal is matrix p, and the image of actual displayed is q, element corresponding in matrix p and q is divided by and obtains matrix m, i.e. m=q/p, m is just equivalent to screen and spells the response of wall to even picture signal; For the picture signal of any input, as long as this picture signal and m are multiplied each other and can obtain spelling the image of wall actual displayed.From m, find the corresponding submatrix n in adjacent area, then in n the mean value of a selected element or several adjacent elements as benchmark by n normalization, matrix N after normalization is exactly that required adjacent area light is adjusted coefficient, and this element position is defined as Benchmark brightness district.Utilize this light to adjust coefficient, the picture signal of adjacent area is first outputed to screen display again divided by this light adjustment coefficient and just can realize the response of received image signal is to uniform response, keep the response in Benchmark brightness region constant simultaneously.That is to say, each input piece image, only the picture signal of its adjacent area first need be adjusted to coefficient divided by this light and output to again screen display, can make adjacent area actual displayed Image Adjusting to identical in the Luminance Distribution of adjacent area with received image signal, guarantee that the brightness in selected Benchmark brightness region is constant simultaneously.
If be appreciated that, picture signal p directly uses even picture signal, and m=q, can save a step division arithmetic process, is comparative optimization.In addition, normalized submatrix n process (divided by a constant) has in fact been given tacit consent to and will will have been shown that Image Adjusting is even; If not adjust evenly but be adjusted into slow variation, can be by submatrix n divided by a specific slowly matrix for change profile.
About the selection in Benchmark brightness region, preferably, in can selection matrix n, the mean value of minimum element or less several adjacent elements be normalized as benchmark, and now selected Benchmark brightness region is exactly region minimum with respect to specific image signal brightness in adjacent area.The benefit of so selecting is: the each element value in the matrix N (being that adjacent area light is adjusted coefficient) after normalization is not less than 1, like this, the value that the picture signal of adjacent area input is adjusted after coefficient divided by this light all only can diminish, this adjustment reduces corresponding to the image brightness that adjacent area is shown, so always can realize.Certainly, its cost is to make the brightness that adjacent area image impairment is certain.
If be not normalized as benchmark using the least member in n,, will there is being less than 1 element value in the matrix N after normalization in the region minimum with respect to specific image signal brightness in so selected Jiu Bushi adjacent area, Benchmark brightness region.The corresponding region of value that is less than 1 for these, if the image signal value of input is larger, adjusts acquired results after coefficient divided by this light so and just may exceed the high-high brightness that spelling wall can show and cannot show.A kind of processing mode is to show with maximum brightness value exceeding maximum brightness value, shows the certain grey exponent number of image although sacrificed, and as the normalized situation of benchmark, has but further improved the brightness of adjacent area image with respect to least member in n.
Below be all from matrix n, to select a specific element as benchmark, n to be normalized, corresponding to selecting a specific brightness region to determine the light adjustment coefficient of adjacent area as Benchmark brightness district from adjacent area.In fact we also can select arbitrarily a determined value and as benchmark, n are normalized, and this determined value not necessarily will appear in n.For example, in selection n, peaked 80% as fiducial value, the each element value in n is obtained to light divided by fiducial value and adjust coefficient N.While utilizing such light adjustment coefficient to adjust the image brightness of each position in adjacent area, may cause the regional luminance having to improve, some regional luminances reduce, in the time that the value of certain element in n is less than fiducial value, corresponding to the region at this element place, its brightness value will be enhanced, in the time that the value of certain element in n is greater than fiducial value, corresponding to this region, its brightness value will be lowered.Direct output display when brightness reduces, but brightness just may exceed the max-thresholds that spelling wall can show while improving, equally, can carry out output display by maximum brightness value to the brightness that exceedes max-thresholds.The benefit of doing is like this to go to find Benchmark brightness district again.And this value also can be adjusted according to actual needs flexibly: this value is selected large, and luminance loss is little, and GTG sacrifice is many; This value is selected little, and luminance loss is large, but GTG sacrifice is few.
The method that another kind of calculating adjacent area light is adjusted coefficient is as follows: establishing inputted specific image signal matrix is p, and the image of actual displayed is q, matrix p is obtained to matrix m divided by q, the difference of m=p/q(and front a kind of computational methods is that molecule and denominator exchange, so now the each element in m is the inverse of corresponding element in aforementioned m).From m, find the corresponding submatrix n in adjacent area, then from n, a selected element is as benchmark by submatrix n normalization, and this element position is exactly selected Benchmark brightness district, and the matrix N after normalization is exactly that alternative light is adjusted coefficient.Utilize this light to adjust coefficient, each input one sub-picture signal later, all only the picture signal of its adjacent area first need be multiplied by this light and adjust coefficient output display again, can make the image brightness of its actual displayed adjust to identical in the Luminance Distribution of adjacent area with received image signal, guarantee that the brightness in selected Benchmark brightness region is constant simultaneously.About the selection of benchmark element in n, it is the selection in Benchmark brightness district in adjacent area, contrary with preceding method, from n, select greatest member to be equivalent in n, select least member in aforementioned schemes, from n, select least member to be equivalent in n, select greatest member in aforementioned schemes, can certainly select a definite brightness value, repeat no more herein.
Above two kinds of calculating adjacent area light are adjusted the method for coefficient, to be the most also optimum mode, utilize the light calculating to adjust coefficient, only the picture signal of adjacent area input need be multiplied by or adjust after coefficient output display divided by this light again to make the picture signal that shows identical with received image signal (for the situation of m=p/q, need to adopt multiplication, for the situation of m=q/p, need to adopt division).In fact, the computational methods that light is adjusted coefficient are far above above two kinds, can take formula more flexibly to calculate, for example:
No matter adopt which kind of computing formula, all have a reverse formula, utilize this reverse formula to obtain p from m and q, for above-mentioned two formula, its reverse formula is as follows:
p＝q×10
m,p＝q×m
2
This reverse formula is exactly the formula for received image signal is adjusted, and is defined as adjustment formula.In a word, no matter take which kind of formula to calculate light and adjust coefficient, as long as utilize the light calculating to adjust coefficient and corresponding adjustment formula, adjacent area can be shown to the Luminance Distribution of image is adjusted to identical with the Luminance Distribution of inputted picture signal in adjacent area.
In addition, also can be not by even the luminosity response adjustment in adjacent area, but its luminosity response is set to slow gradual change, and guarantee that the position that adjacent area and non-adjacent district have a common boundary does not have jump in brightness to realize the effect of even demonstration.It is that the step of slow gradual change is as follows that a kind of method of processing intermediate frequency spectrum filtering by picture signal regulates adjacent area luminosity response: first input a width specific image signal p, if it is q that screen is spelled the picture signal of wall actual displayed, element corresponding in matrix p and q is divided by and obtains matrix m, be that m=q/p(m is that screen is spelled the response of wall to even picture signal), from m, find out the corresponding submatrix n in adjacent area.Then this submatrix n is carried out to two dimensional discrete Fourier transform and obtain its spectrum distribution, radio-frequency component in filtering frequency spectrum again, finally filtered frequency spectrum is carried out to inverse Fourier transform and obtain new matrix N, n and the N respective pixel light that just obtains required each position that is divided by is adjusted to coefficient.Utilize this light to adjust coefficient, only the picture signal of its adjacent area first need be adjusted to coefficient divided by this light and just can make adjacent area image show that for the response of input signal be gradual change response.Every input piece image after that is to say, only need first adjust coefficient (because the computing formula of m is m=q/p) divided by this light by the picture signal of its adjacent area, then outputs to screen display and can realize the effect of even demonstration.The benefit of this method is because the response that the adjacent area image after adjusting shows does not become absolute uniform response, but become gradual change response according to the trend of original response, the amplitude of adjusting in the situation that not affecting display effect is less, and brightness is sacrificed also less.
The above-mentioned light calculating by filtering is adjusted in coefficient matrix, and the value of a part of element having is less than 1, the corresponding adjacent area of element that is less than 1 for these, and it is large that the picture signal of input will become after adjusting, and will improve corresponding to display brightness.If the picture carrier value of input is larger, adjusting acquired results after coefficient divided by this light so just may exceed the max-thresholds that spelling wall can show and cannot show, now can be by the mode processing of describing above: the brightness value that exceedes max-thresholds is shown with maximum brightness value, show the certain GTG of image, the brightness that has improved image although sacrificed like this.Another processing mode is as follows: light is adjusted to each element in coefficient matrix and add an identical a small amount of, guarantee that wherein the value of each element is not less than 1, can guarantee that like this received image signal brightness after adjusting is all lowered, so always exportable demonstration.
For the matrix m calculating with other formula, also can obtain corresponding light by identical High frequency filter processing and adjust coefficient, these light adjustment coefficients also can be realized the effect of the slow gradual change of adjacent area luminosity response.When the light adjustment coefficient that just recycling is calculated carries out the adjustment of adjacent area brightness, need adjust the corresponding adjusting formula of coefficient according to this light and go to calculate.Although be the method for adjusting the slow gradual change of adjacent area brightness above, for the adjustment of buffering area brightness, also can process after the same method.
Preferably, specific image signal p is uniform picture signal, can reduce like this operand.
About the method that adjacent area luminosity response is adjusted into slow gradual change response, also can not pass through spectral filtering, but directly make its brightness response curve smooth by curve, describe as an example of Fig. 5 example.In Fig. 5, discrete point range 51 for the even image of input after the shown image in adjacent area along the luminosity response of certain width section, curve 52 is for to carry out the curve after matching to this discrete point range, curve 53 is that straight line 54 is take the minimum brightness value in discrete point 51 as the drawn horizontal line of standard by the curve after curve 52 entirety translations downwards.Discrete point is carried out curve fitting and there is no fixing mathematical form, as long as guarantee the smooth and slow gradual change of matched curve, also needn't consider the precision of matching, so even can manually go to draw.Curve after matching is exactly the luminosity response after adjusting, for the adjustment that makes brightness always can realize, need be by the curve entirety translation downwards after matching, and the curve after assurance translation is under all discrete points, as shown in curve in Fig. 5 53.The adjustment that curve 53 is done with respect to former discrete luminance values is exactly that corresponding light is adjusted coefficient.The corresponding overall brightness of curve 53 obviously will be higher than straight line 54, so this mode adjacent area brightness adjustment being responded as slow gradual change take matched curve, with respect to take adjacent area minimum brightness value as standard by adjacent area brightness adjustment the mode as uniform response, make adjacent area there is higher brightness, also can guarantee that the image showing has good display effect simultaneously.What be appreciated that Fig. 5 shows is the luminosity response in a width section direction in an adjacent area, and in fact adjacent area is a 2 dimensional region, so above-mentioned curve also may expand to surface fitting computing.
Step 102 is obtained the received image signal of screen spelling wall.From the external world obtains picture signal, deposit the frame data of this picture signal in memory, prepare follow-up computing.
Step 103 adopts light to adjust coefficient received image signal adjustment is obtained to new received image signal, shows with this new received image signal so that screen is spelled wall; Or adopt light adjustment coefficient to adjust and obtain new light source driving parameter the light source driving parameter obtaining according to received image signal, so that spelling wall, screen drive driving parameter light source to show with this new light source.
Calculate adjacent area light and adjust after coefficient, then need adjust coefficient according to this light the image brightness of adjacent area demonstration is adjusted, its adjustment mode comprises the adjustment to picture signal and the adjustment to light source.Be exactly according to light adjustment coefficient and corresponding adjustment formula, each frame image signal of input to be processed to the adjustment of picture signal, adjustment formula is corresponding with the formula that obtains adopting when this light is adjusted coefficient, only take the situation of m=p/q, as example describes, (its adjustment formula is as p=q × m, adjust coefficient corresponding to picture signal being multiplied by light), adjust coefficient, all fours as for the light calculating by other formula.If it is N that the adjacent area light calculating is adjusted coefficient matrix, each two field picture to input, all needs first this picture signal to be multiplied by light and adjusts coefficient matrix N, and then by result of calculation output display.This Technology Need high speed image process chip is to process in real time fast each two field picture, and cost is higher.
It is exactly the power output of adjusting coefficient adjustment light source diverse location according to light to the adjustment of light source.Typically, this driving power that regulates light source that is adjusted to, comprise the curtage that regulates driving power, its regulative mode and similar to the adjusting of picture signal: for example, if it is N that the light calculating is adjusted coefficient, while utilizing it to carry out the adjustment of picture signal, we need be multiplied by each two field picture p of input after N output display again, so corresponding to the adjustment of light source, we just need be (corresponding with each frame image signal by the driving current value of this picture signal, can set up in advance the mapping table of image intensity signal and driving current value and then obtain the driving current value of each position according to this mapping table and each two field picture.This is prior art) be used further to driving light source after being multiplied by N or the duty ratio of driving power being multiplied by N.Obviously, the method need to guarantee that the power drives of each pixel can be controlled separately in screen display unit.In addition, we also can implement the adjustment of picture signal and the adjustment of light source to every two field picture simultaneously.Comprehensive above-mentioned two kinds of methods of adjustment are appreciated that, for projection screen or LCD display, because adjusting local driving power, can adjust display brightness by the treatment technology to received image signal, and for LED display, can directly adjust by light source treatment technology the power output of each LED lamp.
Utilize above-mentioned adjacent area light to adjust coefficient and method of adjustment, can be by even adjacent area brightness adjustment, but may occur jump in brightness between adjacent area and non-adjacent district, now solution is, further comprising the steps of 104 and step 105:
Step 104 is obtained the light of each position in predetermined buffer district and is adjusted coefficient, between the non-adjustment district that buffering area does not adjust in adjacent area and this method of adjustment, the light of buffering area adjust image that coefficient makes buffering area show for the response of input signal be can mutagenesis sense gradual change response, make position that buffering area and adjacent area have a common boundary and the position of buffering area and boundary, non-adjustment district there is no jump in brightness.
Non-adjustment district is positioned at the centre of screen spelling wall unit, in general can occupy the main display area of screen spelling wall unit.The setting of buffering area as shown in Figure 4,41 is cross adjacent area, 42a, 42b, 42c, 42d is buffering area, when brightness ratio non-adjacent district brightness around in adjacent area declines when a lot of, by the transition of this buffering area, can realize the slow gradual change of brightness and there will not be sudden change, the 43 brightness change curves that are whole combination in figure.
The width of buffering area is selected flexibly according to actual conditions, and according to general knowledge, when adjacent area and non-adjacent district jump in brightness are when larger, buffering area width should be selected largerly, makes luminance transition as far as possible mild; Otherwise, when adjacent area and non-adjacent district jump in brightness hour, adjacent area width can be selected smallerly.Due in different display units inside, on adjacent area and border, non-adjacent district the sudden change of brightness normally different, so the width of buffering area is also different.This gradual change degree preferably, can buffering area luminosity response be set to, along width linearity gradual change, can certainly have other gradual manner, as long as can not cause visual sudden change.
It is similar that obtain and the light of adjacent area of the light adjustment coefficient of buffering area is adjusted obtaining of coefficient.Step 104 approaches with the step that step 101 completes, and also may be incorporated in a step and completes.
Step 105 adopts the light of buffering area to adjust coefficient received image signal adjustment is obtained to new received image signal, shows with this new received image signal so that screen is spelled wall; Or adopt the light adjustment coefficient of buffering area to adjust and obtain new light source driving parameter the light source driving parameter obtaining according to received image signal, so that spelling wall, screen drive driving parameter light source to show with this new light source.
The action that step 105 is taked to step 103 is similar, also may be incorporated in a step and completes.
Should be appreciated that buffering area is unnecessary in the time that the brightness of adjacent area and the difference in brightness in non-adjacent district are not enough to cause discovering of human eye.
In sum, compared with conventional art, the present invention is in the time adjusting the brightness uniformity of screen spelling wall, it not the uniformity that reduces whole screen and spell the brightness of wall and guarantee its brightness, but by adjacent area is set, only in adjacent area or adjacent area and buffering area, brightness adjusting is realized the uniform response of local luminance or gradual change that can mutagenesis sense responds, simultaneously, because the brightness accounting in the non-adjacent district of the whole screen overwhelming majority does not all regulate, with respect to prior art, the brightness of whole spelling wall has had and has increased substantially, and tiled display is respond well simultaneously.
Fig. 6 is the schematic diagram of second embodiment of the invention.The difference of itself and the first embodiment is, now adjacent area 61 is defined as the peripheral regions of each display unit, and the width of each adjacent area is still selected according to actual conditions, and preferably, each adjacent area is wide is no more than 1/5 of the display unit length of side under it.The benefit of the adjacent area of definition is like this, can be before screen spelling wall be spliced, in advance the brightness in all of its neighbor district is all adjusted to the suitable value of a unification, the brightness that guarantees different rear its seam two side areas of display unit splicing is consistent, thereby just can guarantee the consistent of combination seam crossing brightness without the adjustment of carrying out again adjacent area brightness.Predefined suitable brightness value can be selected according to actual conditions, for example, the different display unit of producing if known, its minimum brightness is maximum brightness 80%, the brightness unification of each display unit surrounding adjacent area can be adjusted into 80% of highest brightness value, can guarantee that like this adjustment of this critical zone brightness always can realize for each display unit.
Equally, in the time there is brightness or color change between edges abut district and inner non-adjacent district, can between adjacent area and non-adjacent district, buffering area be further set, luminosity response in buffering area is with the slow gradual change in position, and guarantee that buffering area and the intersection of adjacent area and the intersection in buffering area and non-adjacent district do not have jump in brightness, thereby realize screen and spell the effect that wall evenly shows, or directly the brightness of adjacent area is set to slow gradual change, and guarantee that the position that adjacent area and non-adjacent district have a common boundary does not have jump in brightness.The setting of buffering area width and how that brightness regulation is identical with the first embodiment to slow gradual change, is not repeating.
Like this, by only in adjacent area or adjacent area and buffering area set brightness brightness declined, and other regions are not set, and have had to increase substantially with respect to prior art brightness, tiled display is respond well simultaneously.In addition because each display unit in the second embodiment is the brightness that has just defined afterwards adjacent area and adjacent area in production, need to after determining, combination not carry out again determining and successive image processing of adjacent area, can realize simply and easily the expansion of Mosaic screen, be very easy to client's use.
Fig. 7 is the schematic diagram of third embodiment of the invention.In foregoing the first embodiment, in the time that adjacent area area is large or adjacent area brightness changes greatly, if still the brightness regulation of whole adjacent area is arrived consistent with the brightness value in its inner minimum brightness region, may still can make the larger brightness of whole combination loss, now can be by shown in Fig. 7, further adjacent area is divided into the sub-adjacent area of polylith along the bearing of trend at the edge of affiliated display unit, then using each piece adjacent area as an independently overall adjusting of carrying out brightness, the light of every sub-adjacent area is adjusted image that coefficient makes this sub-adjacent area and is shown that for the response of input signal be uniform response or gradual change response that can mutagenesis sense.Meanwhile, for the brightness that makes adjacent sub-adjacent area there will not be sudden change, can buffering area be further set at the adjoiner of adjacent sub-adjacent area, or directly make the slow gradual change of brightness of adjacent block by the method for spectral filtering.Buffering area is set and how brightness adjusting is realized the even or slow gradual change of brightness about how at adjoiner, before existing narration in embodiment, no longer explanation herein.
By the further segmentation that whole adjacent area is carried out, can carry out brightness adjustment to each piece separately.The benefit of doing is like this, if the dark areas of whole adjacent area appears in one of them piece, the brightness of other piece just does not need to adjust to the brightness of the dark areas in whole adjacent area, and only need be adjusted into the brightness of the dark areas in its oneself piece.This has further improved display brightness undoubtedly.
Below the control method of just having introduced 2 × 2 screens spelling wall brightness uniformities, as for the adjusting of color homogeneity, the brightness that only needs application said method that screen is spelled to each primary color image of wall regulates evenly, can guarantee the uniformity of final color.This primary color image may be red, green, blue tristimulus image, may be also the tristimulus image of other color, in a word, as long as guarantee that the brightness of each monochrome image is even, can guarantee the even of final color.
The present invention also proposes a kind of adjusting device, is applied to screen and spells wall, and screen is spelled wall and is closely stitched together by least two screen display unit, and this adjusting device comprises:
The first acquisition module, adjust coefficient for the light that obtains each position in predetermined adjacent area, adjacent area cover screen is spelled all seams of wall, and light is adjusted image that coefficient makes adjacent area and shown that for the response of input signal be uniform response or gradual change response that can mutagenesis sense;
The second acquisition module, for obtaining the received image signal of screen spelling wall;
Adjusting module, obtains new received image signal for adopting light to adjust coefficient to received image signal adjustment, shows with this new received image signal so that screen is spelled wall; Or for adopting light to adjust coefficient, the light source driving parameter obtaining according to received image signal is adjusted and obtained new light source driving parameter, so that spelling wall, screen drive driving parameter light source to show with this new light source.
Be appreciated that the function of the first acquisition module is corresponding to aforesaid step 101, the function of the second acquisition module is corresponding to aforesaid step 102, and the function of adjusting module, corresponding to aforesaid step 103, is not being described in detail herein.
Corresponding to aforesaid step 104, this adjusting device also may comprise the 3rd acquisition module, adjust coefficient for the light that obtains each position in predetermined buffer district, between the non-adjustment district that buffering area does not adjust in adjacent area and this method of adjustment, the light of buffering area adjust image that coefficient makes buffering area show for the response of input signal be can mutagenesis sense gradual change response, make position that buffering area and adjacent area have a common boundary and the position of buffering area and boundary, non-adjustment district there is no jump in brightness.Obviously, the 3rd acquisition module can be same module with the first acquisition module.
Corresponding to aforesaid step 105, adjusting module also obtains new received image signal for adopting the light of buffering area to adjust coefficient to received image signal adjustment, shows with this new received image signal so that screen is spelled wall; Or adopt the light adjustment coefficient of buffering area to adjust and obtain new light source driving parameter the light source driving parameter obtaining according to received image signal, so that spelling wall, screen drive driving parameter light source to show with this new light source.
The present invention also proposes a kind of ray machine, spells wall for screen.Ray machine comprises light supply apparatus, optic modulating device, projection optical system and above-mentioned adjusting device.
This adjusting device not only has each function mentioned in the various embodiments described above, also sends to optic modulating device for the new received image signal that adjustment is obtained; The light that the picture signal that optic modulating device sends according to adjusting device is sent light supply apparatus modulates to form image light.Or this adjusting device also drives parameter to send to light supply apparatus for the new light source that adjustment is obtained; The light source that light supply apparatus sends according to adjusting device drives parameter to send light, and the light that optic modulating device sends light supply apparatus modulates to form image light.Image light projects away and on screen, forms image through projection optical system.
The present invention also proposes a kind of screen and spells wall system, comprises screen spelling wall, and screen is spelled wall and is closely stitched together by least two display screen units, and this system produces the even of picture signal or gradual change response with above-mentioned adjusting device.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (15)
1. a method of adjustment, is applied to screen and spells wall, and described screen is spelled wall and is closely stitched together by least two screen display unit, it is characterized in that, this method of adjustment comprises:
Obtain the light of each position in predetermined adjacent area and adjust coefficient, described adjacent area covers described screen spells all seams of wall, and described light is adjusted image that coefficient makes adjacent area and shown that for the response of input signal be uniform response or gradual change response that can mutagenesis sense;
Obtain described screen and spell the received image signal of wall;
Adopt described light to adjust coefficient described received image signal adjustment is obtained to new received image signal, show with this new received image signal so that described screen is spelled wall; Or adopt described light adjustment coefficient to adjust and obtain new light source driving parameter the light source driving parameter obtaining according to described received image signal, so that spelling wall, described screen drive driving parameter light source to show with this new light source.
2. method of adjustment according to claim 1, is characterized in that: described gradual change response further meets human eye described screen is spelled to the image demonstration of wall between adjacent area and non-adjacent district without sudden change sense.
3. method of adjustment according to claim 1, is characterized in that: described adjacent area is distributed in the edge of each screen display unit, and described light adjustment coefficient makes the image of adjacent area show to be predetermined uniform response for the response of input signal.
4. method of adjustment according to claim 1, is characterized in that: border, described adjacent area is curved boundary.
5. method of adjustment according to claim 1, is characterized in that, further comprising the steps of:
Obtain the light of each position in predetermined buffer district and adjust coefficient, between the non-adjustment district that described buffering area does not adjust in adjacent area and this method of adjustment, the light of described buffering area adjust image that coefficient makes buffering area show for the response of input signal be can mutagenesis sense gradual change response, make position that buffering area and adjacent area have a common boundary and the position of buffering area and boundary, non-adjustment district there is no jump in brightness;
Adopt the light adjustment coefficient of described buffering area to obtain new received image signal to described received image signal adjustment, show with this new received image signal so that described screen is spelled wall; Or adopt the light adjustment coefficient of described buffering area to adjust and obtain new light source driving parameter the light source driving parameter obtaining according to described received image signal, so that spelling wall, described screen drive driving parameter light source to show with this new light source.
6. method of adjustment according to claim 1, it is characterized in that: described adjacent area further comprises the multiple sub-adjacent area distributing along the bearing of trend at the edge of described display unit, the light of every sub-adjacent area is adjusted image that coefficient makes this sub-adjacent area and is shown that for the response of input signal be uniform response or gradual change response that can mutagenesis sense.
7. a method of adjustment, is applied to screen and spells wall, and this screen is spelled wall and is closely stitched together by least two screen display unit, and screen spells wall and can show at least three kinds of primary lights, the first primary lights, and the second primary lights and three primary colors light, comprise the following steps:
Application is adjusted the first primary colours uniformity of light according to the method for adjustment described in any one in claim 1 to 6;
Application is adjusted the second primary colours uniformity of light according to the method for adjustment described in any one in claim 1 to 6;
Application is adjusted three primary colors uniformity of light according to the method for adjustment described in any one in claim 1 to 6.
8. an adjusting device, is applied to screen and spells wall, and described screen is spelled wall and is closely stitched together by least two screen display unit, it is characterized in that, this adjusting device comprises:
The first acquisition module, adjust coefficient for the light that obtains each position in predetermined adjacent area, described adjacent area covers described screen spells all seams of wall, and described light is adjusted image that coefficient makes adjacent area and shown that for the response of input signal be uniform response or gradual change response that can mutagenesis sense;
The second acquisition module, for obtaining the received image signal of described screen spelling wall;
Adjusting module, obtains new received image signal for adopting described light to adjust coefficient to described received image signal adjustment, shows with this new received image signal so that described screen is spelled wall; Or for adopting described light to adjust coefficient, the light source driving parameter obtaining according to described received image signal is adjusted and obtained new light source driving parameter, so that spelling wall, described screen drive driving parameter light source to show with this new light source.
9. adjusting device according to claim 8, is characterized in that: described gradual change response further meets human eye described screen is spelled to the image demonstration of wall between adjacent area and non-adjacent district without sudden change sense.
10. adjusting device according to claim 8, is characterized in that: described adjacent area is distributed in the edge of each screen display unit, and described light adjustment coefficient makes the image of adjacent area show to be predetermined uniform response for the response of input signal.
11. adjusting devices according to claim 8, is characterized in that: border, described adjacent area is curved boundary.
12. adjusting devices according to claim 8, is characterized in that:
Also comprise the 3rd acquisition module, adjust coefficient for the light that obtains each position in predetermined buffer district, between the non-adjustment district that described buffering area does not adjust in adjacent area and this method of adjustment, the light of described buffering area adjust image that coefficient makes buffering area show for the response of input signal be can mutagenesis sense gradual change response, make position that buffering area and adjacent area have a common boundary and the position of buffering area and boundary, non-adjustment district there is no jump in brightness;
Described adjusting module also obtains new received image signal for adopting the light of described buffering area to adjust coefficient to described received image signal adjustment, shows with this new received image signal so that described screen is spelled wall; Or adopt the light adjustment coefficient of described buffering area to adjust and obtain new light source driving parameter the light source driving parameter obtaining according to described received image signal, so that spelling wall, described screen drive driving parameter light source to show with this new light source.
13. adjusting devices according to claim 8, it is characterized in that: described adjacent area further comprises the multiple sub-adjacent area distributing along the bearing of trend at the edge of described display unit, the light of every sub-adjacent area is adjusted image that coefficient makes this sub-adjacent area and is shown that for the response of input signal be uniform response or gradual change response that can mutagenesis sense.
14. 1 kinds of ray machines, spell wall for screen, it is characterized in that, comprise the adjusting device as described in any one in claim 8-13.
15. 1 kinds of screens are spelled wall system, comprise screen spelling wall, and described screen is spelled wall and is closely stitched together by least two display screen units, it is characterized in that, this system also comprises the adjusting device as described in claim 8-13 any one.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210562883.6A CN103813116A (en) | 2012-11-15 | 2012-12-21 | Adjusting method, adjusting device, light machine and screen splicing wall system |
| PCT/CN2013/086479 WO2014075565A1 (en) | 2012-11-15 | 2013-11-04 | Adjustment method, adjustment device, optical machine and screen splicing wall system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210460700.X | 2012-11-15 | ||
| CN201210460700 | 2012-11-15 | ||
| CN201210562883.6A CN103813116A (en) | 2012-11-15 | 2012-12-21 | Adjusting method, adjusting device, light machine and screen splicing wall system |
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| WO (1) | WO2014075565A1 (en) |
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Application publication date: 20140521 |