CN105611259A - LCD projector color uniformity adjustment method and adjustment device - Google Patents
LCD projector color uniformity adjustment method and adjustment device Download PDFInfo
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- CN105611259A CN105611259A CN201510945385.3A CN201510945385A CN105611259A CN 105611259 A CN105611259 A CN 105611259A CN 201510945385 A CN201510945385 A CN 201510945385A CN 105611259 A CN105611259 A CN 105611259A
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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]
- H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
- H04N9/3105—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators
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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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Abstract
The invention discloses an LCD projector color uniformity adjustment method and adjustment device. The method includes the following steps that: a plurality of pixels are obtained from a projection image of an LCD projector, the pixel value of each pixel is corresponding to a control parameter of the LCD projector, the value of the control parameter is corresponding to an adjustment layer; the control parameters corresponding to the pixels are all set to the value of the control parameter corresponding to a current adjustment layer; the pixel value of each pixel is detected; deviation values which are required by the current values of the control parameters corresponding to the pixels are obtained, so that the pixel values of the pixels are all adjusted to pixel values consistent with the pixel value of a reference point; and the corresponding deviation values are added to the current values of the control parameters corresponding to the pixels, so that updated control parameters can be obtained. With the LCD projector color uniformity adjustment method and adjustment device adopted, the technical problem of low efficiency of an existing LCD projector color uniformity adjustment method can be solved.
Description
Technical field
The present invention relates to projection field, particularly a kind of LCD projecting apparatus color uniformity method of adjustment and tuneEngagement positions.
Background technology
Existing LCD projecting apparatus is thrown to produce laser imaging light according to the signal of video signal of tableaux or dynamic menuBe mapped on screen to form static state or dynamic projection image watches for people. This LCD projecting apparatus can utilize laserDeng as light emitting source, its projection theory and technology include but not limited to laser grid pattern (Rasterpattern)Scanning projection technology, DLP (DigitalLightProcession, digital light processing) shadow casting technique, LCD(LiquidCrystalDisplay, liquid crystal display) shadow casting technique and LCOS (LiquidCrystalOnSilicon, the attached silicon of liquid crystal) shadow casting technique etc. Wherein, this laser imaging light is projected on this screen,Its projected path forms the laser projection scope of a taper, this throwing between this LCD projecting apparatus and this screenThe regional extent of shadow image can be considered that this laser imaging is projected to the maximal projection angular range culvert on this screenThe picture of lid.
In the production process of LCD projecting apparatus, need to adjust its LCD projecting apparatus color uniformity,So that LCD projecting apparatus obtains good color representation. Wherein, the color uniformity refers to from a viewing areaAll maintain equal pixel value to another viewing area. On the contrary, color unevenness is regarded as from oneRegion can be gradually to the pixel value in another region change and transfer, make to show discontinuous, and make to watchPerson's eyes feel uncomfortable. All can there is subregion and its in the picture that normally, LCD projector projects goes outThe different phenomenon of pixel value in his region, the color uniformity reflects the pixel value in this subregion and other regionsDifference.
At present, based on experience value the LCD projecting apparatus color uniformity is adjusted, conventionally need to be to controlling lookThe parameter of the color uniformity, through repeatedly adjusting, could obtain the color uniformity that meets designing requirement, adjustsJourney is more loaded down with trivial details, and not only much time power, and inefficiency causes production cost higher.
Summary of the invention
For this reason, the technical problem to be solved in the present invention is existing LCD projecting apparatus color uniformity method of adjustmentInefficiency, thereby propose a kind of LCD projecting apparatus color uniformity method of adjustment that can raise the efficiency andLCD projecting apparatus color adjusting device for uniformity solves this problem.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of LCD projecting apparatus color uniformity method of adjustment, described method comprises: pixel obtaining step,Obtain several pixels from the projected image of described LCD projecting apparatus, and obtain from described several pixelsGet a reference point, the pixel value of each described pixel is a control ginseng of corresponding described LCD projecting apparatus separatelyNumber, the value corresponding of described control parameter is adjusted layer; Control parameter setting steps, by each described pixelEach self-corresponding described control parameter is all set to the current value of adjusting the described control parameter that layer is corresponding; PixelBe worth detecting step, detect the pixel value of each described pixel; Deviant obtaining step, according to described referenceThe pixel value of point and each described pixel, obtains the each self-corresponding described control parameter of each described pixelCurrency respectively required deviant so that the pixel value of each described pixel is all adjusted into and described referenceThe pixel value of point is consistent; Control parameter adjustment step, by each each described pixel self-corresponding described controlThe currency of parameter adds respectively corresponding described deviant, to obtain the control parameter after renewal.
Preferably, described method also comprises: according to preset times return carry out described pixel value detecting step,Described deviant obtaining step and described control parameter adjustment step.
Preferably, described method also comprises: by equal each each described pixel self-corresponding described control parameterSet gradually the value for adjusting the described control parameter that layer is corresponding described in each, and described in each corresponding executionPixel value detecting step, described deviant obtaining step and described control parameter adjustment step.
Preferably, described deviant obtains according to following formula:
Voffset＝a*log(Loutput/Ltarget)
Wherein a is for adjusting coefficient, LtargetFor the pixel value of described reference point, LoutputFor the pixel of described pixelValue.
Preferably, described adjustment coefficient obtains by the mode of sectional curve matching.
Based on identical inventive concept, the present invention also provides a kind of LCD projecting apparatus color adjusting device for uniformity,Described device comprises: pixel acquisition module, and for obtaining some from the projected image of described LCD projecting apparatusIndividual pixel, and from described several pixels, obtain a reference point, the pixel of each described pixelValue is a control parameter of corresponding described LCD projecting apparatus separately, and the value corresponding of described control parameter is adjusted layer;Control parameter module is set, for each each described pixel self-corresponding described control parameter is all set toThe current value of adjusting the described control parameter that layer is corresponding; Pixel value detection module, for detection of each described pictureThe pixel value of vegetarian refreshments; Deviant acquisition module, for according to the picture of described reference point and each described pixelElement value, the required skew of currency difference of obtaining the each self-corresponding described control parameter of each described pixelValue is consistent with the pixel value of described reference point so that the pixel value of each described pixel is all adjusted into; Control ginsengNumber adjusting module, for adding the currency of the each self-corresponding described control parameter of each described pixel respectivelyThe described deviant of upper correspondence, to obtain the control parameter after renewal.
Preferably, also comprise: further adjusting module, carry out described pixel for returning according to preset timesValue detection module, described deviant acquisition module and described control parameter adjustment module.
Preferably, also comprise: layering adjusting module, for by each each described pixel self-corresponding described inControl parameter and all set gradually the value into adjusting the described control parameter that layer is corresponding described in each, and each phaseShould carry out described pixel value detection module, described deviant acquisition module and described control parameter adjustment module.
Preferably, described deviant obtains according to following formula:
Voffset＝a*log(Loutput/Ltarget)
Wherein a is for adjusting coefficient, LtargetFor the pixel value of described reference point, LoutputFor the pixel of described pixelValue.
Preferably, described adjustment coefficient obtains by the mode of sectional curve matching.
The beneficial effect of LCD projecting apparatus color uniformity method of adjustment of the present invention and adjusting device comprises:
According to the pixel value of described reference point and each described pixel, obtain the picture of each described pixelElement value is all adjusted into when consistent with the pixel value of described reference point, each described pixel each self-corresponding described inRespectively required deviant of the currency of controlling parameter, so by each each described pixel self-corresponding described inThe currency of controlling parameter adds respectively corresponding described deviant, just can make the picture of each described pixelElement value is all adjusted into consistent with the pixel value of described reference point, and adjustment process is simple, not only raise the efficiency, andAnd reduce production costs.
Brief description of the drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, institute in describing embodiment belowNeed the accompanying drawing using to be briefly described, apparently, the accompanying drawing in the following describes is only the present inventionSome embodiment, for those of ordinary skill in the art, do not paying under the prerequisite of creative work,Can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the perspective view of the LCD projecting apparatus in the embodiment of the present invention;
Fig. 2 be the control voltage that applies on the LCD liquid crystal cells of the LCD projecting apparatus in the embodiment of the present invention withThe relation curve schematic diagram of the color lumen ratio of corresponding pixel points;
Fig. 3 is described relation curve in Fig. 2 schematic diagram after gamma transformation;
Fig. 4 is the flow chart of a kind of LCD projecting apparatus color uniformity method of adjustment of providing of the embodiment of the present invention;
Fig. 5-1st, the pixel obtaining from projected image in the embodiment of the present invention and the schematic diagram of reference point;
Fig. 5-2nd, the pixel obtaining from the subregion of projected image and reference point in the embodiment of the present inventionSchematic diagram;
Fig. 6 is that the structure of a kind of LCD projecting apparatus color adjusting device for uniformity of providing of the embodiment of the present invention is shownIntention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with the embodiment of the present inventionIn accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described.
Fig. 1 shows LCD projecting apparatus color uniformity method of adjustment and the adjustment dress that the embodiment of the present invention providesThe applied environment of putting. As shown in Figure 1, this applied environment comprises: LCD projecting apparatus 12, described LCD projectionInstrument 12 produce projection light to projected area 11 with form projected image 10. Wherein, the LCD of described LCD projecting apparatusComprise several liquid crystal cells, on a described liquid crystal cells, apply and control after voltage, on described projected area 11Pixel of corresponding formation; On all liquid crystal cells of described LCD, all apply after corresponding control voltage,On described projected area 11, each pixel of corresponding formation forms described projected image 10. In other words,Each pixel of the projected image 10 of projected area 11 is a liquid crystal cells of corresponding LCD separately, described pictureThe color lumen ratio of vegetarian refreshments is determined by the control voltage swing applying on liquid crystal cells corresponding to this pixel.
By Photoelectric Detection equipment 13 being set in described projected area 11, can detecting on the liquid crystal cells of LCD and executeThe relation of the color lumen ratio of the control voltage adding and corresponding pixel points, thus obtain applying on liquid crystal cellsControl voltage and the relation curve of the color lumen ratio of corresponding pixel points as shown in Figure 2. This relation curveObtain curve as shown in Figure 3 through gamma (gamma) conversion. According to curve as shown in Figure 3, pass throughAdjust the control voltage applying on the liquid crystal cells of described LCD, can reach this liquid crystal cells of adjustment correspondingThe color lumen ratio object of pixel. Above-mentioned Photoelectric Detection equipment 13 can be color analysis instrument, also canIt is camera etc. As shown in Figure 1, camera 131 is taken the projected image 10 of described projected area 11 to example, will takeImage transmitting to computer 132, described computer 132 carries out analyzing and processing to described image and obtains LCDThe relation of the color lumen ratio of the control voltage that liquid crystal cells applies and corresponding pixel points, and then obtain liquid crystalThe relation curve of the color lumen ratio of the control voltage applying on unit and corresponding pixel points.
Embodiment mono-
Fig. 4 shows a kind of LCD projecting apparatus color uniformity method of adjustment of the embodiment of the present invention. As Fig. 4Shown in, described method can comprise the following steps:
S11, pixel obtaining step, obtain several pixels from the projected image of described LCD projecting apparatus,And from described several pixels, obtaining a reference point, the pixel value of each described pixel is corresponding separatelyOne of described LCD projecting apparatus is controlled parameter, and the value corresponding of described control parameter is adjusted layer.
As shown in Fig. 5-1, from projected image 10, obtain several pixels 111, and some from what obtainIn pixel 111, obtain a reference point 111 ', wherein said reference point 111 ' can be to be positioned at described throwingThe center of image 10, can be also other positions that are positioned at described projected image 10, and this area is generalLogical technical staff can choose as required, does not do concrete restriction here.
Described control parameter can be set to different values. When the value of described control parameter changes, described controlThe pixel value respective change of pixel 111 corresponding to parameter processed. Thus, controlling the value of parameter by adjustment canTo reach the object of the pixel value of adjusting pixel 111 corresponding to this control parameter. In practice, each instituteState control parameter be all set to an initial value, thereafter more respectively to described in each, control parameter adjust withMake the pixel value of each pixel 111 all consistent with the pixel value of described reference point 111 '. Wherein this control ginsengThe initial value of number corresponding one adjusts layer, different adjustment layer corresponding to initial value; In other words,Control parameter and be set to how many different initial values, there is the adjustment number of plies of respective amount. Need explanation, for one of them pixel 111, it is one initial that the control parameter of these pixel 111 correspondences is set toAfter value, may need the control parameter of these pixel 111 correspondences repeatedly to adjust so that this pixel 111Pixel value consistent with the pixel value of described reference point 111 '. Correspondingly, the control of these pixel 111 correspondencesParameter is in course of adjustment and will be repeatedly upgraded. Wherein said control parameter is the LCD of described LCD projecting apparatusLiquid crystal cells on the control voltage that applies, described pixel value is the color lumen ratio of pixel.
It should be noted that, those of ordinary skill in the art can arrange the adjustment number of plies according to actual needs,For example can be according to the color lumen ratio of described reference point and the control applying on corresponding LCD liquid crystal cellsThe specific requirement of voltage relationship and LCD projecting apparatus arranges the adjustment number of plies, and adjustment also can be rule of thumb setThe number of plies, does not do concrete restriction here.
S12, control parameter setting steps, all establish each each described pixel self-corresponding described control parameterBe set to the current value of adjusting the described control parameter that layer is corresponding. Right separately to each described pixel specificallyThe control voltage applying on the liquid crystal cells of the LCD answering, and the value of this control voltage is current adjustmentThe value of the control voltage that layer is corresponding.
S13, pixel value detecting step, detect the pixel value of each described pixel. Particularly, described pixelValue is the color lumen ratio of pixel. Can detect each described pixel by described Photoelectric Detection equipment 13The color lumen ratio of point. Exemplarily, described Photoelectric Detection equipment 13 is cameras 131, described camera 131Take the projected image 10 of described projected area, and photographic images is transferred to computer 132, described computer132 pairs of these images carry out analyzing and processing and draw the color lumen ratio of each described pixel.
S14, deviant obtaining step, according to the pixel value of described reference point and each described pixel, obtainThe currency of the each self-corresponding described control parameter of each described pixel respectively required deviant with by eachThe pixel value of described pixel is all adjusted into consistent with the pixel value of described reference point. Specifically described in basisThe color lumen ratio of reference point and each described pixel, obtains the color stream of each described pixelBright ratio is all adjusted into when consistent with the color lumen ratio of described reference point, and each described pixel is right separatelyThe current required offset voltage of control voltage difference applying on the liquid crystal cells of the LCD answering. In the present embodimentIn, the pixel value of each described pixel is all adjusted into be often consistent with the pixel value of described reference pointThe pixel value of individual described pixel is all adjusted into the pixel value of described reference point and equates; In another embodiment,Also can be the pixel value of each described pixel is all adjusted into the pixel value of described reference point and differs one defaultValue.
Particularly, described offset voltage obtains according to following formula:
Voffset＝a*log(Loutput/Ltarget)
Wherein a is for adjusting coefficient, LtargetFor the color lumen ratio of described reference point, LoutputFor described pixelColor lumen ratio, VoffsetFor described offset voltage. Described in the color lumen ratio substitution of described reference pointIn expression formula, and respectively by expression formula described in the color lumen ratio of each described pixel successively substitution,Obtain the current control voltage applying institute respectively on the liquid crystal cells of the each self-corresponding LCD of each described pixelThe offset voltage needing. Like this, current applying on the liquid crystal cells of the each self-corresponding LCD of each described pixelControl voltage add respectively offset voltage separately, can make the color lumen ratio of each described pixelExample is all consistent with the color lumen ratio of described reference point.
It should be noted that, described adjustment coefficient obtains by the mode of sectional curve matching, in the present embodimentIn, can obtain by the form of Using Call Library Function, not as limit.
S15, control parameter adjustment step, by working as of the each self-corresponding described control parameter of each described pixelFront value adds respectively corresponding described deviant, to obtain the control parameter after renewal. Particularly, supposeIn step S12, the control voltage swing applying on the liquid crystal cells of each described LCD is V0, and falseBe located at offset voltage described in each acquisition in step S14 and be respectively Voffset1、Voffset2、Voffset3……VoffsetN，The quantity that wherein N is described pixel, on the liquid crystal cells of the each self-corresponding LCD of each described pixelThe current control voltage applying adds respectively offset voltage separately, obtains the control voltage after upgrading, resultBe respectively V0+Voffset1、V0+Voffset2、V0+Voffset3……V0+VoffsetN, thereby by each described pixelColor lumen ratio is all adjusted into consistent with the color lumen ratio of described reference point.
It should be noted that and described projected image 10 can also be divided into multiple subregions. Exemplarily, asShown in Fig. 5-2, described projected image 10 is divided into 4 sub regions. From every sub regions, obtain severalPixel 111, and from the some pixels 111 that obtain, obtain a reference point 111 ', wherein said ginsengExamination point 111 ' can be the center that is positioned at described subregion, can be to be also positioned at other of described subregionPosition, those of ordinary skill in the art can choose as required, do not do concrete restriction here. PhaseYing Di, corresponding each described subregion, the control parameter corresponding to pixel value of wherein each pixel 111All be set up an initial value. Therefore, described projected image 10 is divided into how many subregions, and current adjustment layer is rightShould be how many control the initial values of parameters; In other words, the current initial value of adjusting the corresponding multiple control parameter of layer,And each initial value of adjusting the corresponding multiple control parameter of layer. Exemplarily, suppose 4 in Fig. 5-2Subregion is respectively A subregion, B subregion, C subregion and D subregion. Pixel in A subregion111 control parameter corresponding to pixel value is all set up initial value a, the picture of the pixel 111 in B subregionControl parameter corresponding to element value is all set up initial value b, the pixel value correspondence of the pixel 111 in C subregionControl parameter be all set up initial value c, the control ginseng that the pixel value of the pixel 111 in D subregion is correspondingNumber is all set up initial value d. Particularly, the each self-corresponding LCD of each described pixel 111 in A subregionLiquid crystal cells on apply a control voltage Va0, the each described pixel 111 in B subregion is corresponding separatelyThe liquid crystal cells of LCD on apply a control voltage Vb0, the each described pixel 111 in C subregion is eachOn the liquid crystal cells of self-corresponding LCD, apply a control voltage Vc0, the each described pixel in D subregionOn the liquid crystal cells of 111 each self-corresponding LCD, apply a control voltage Vd0. Suppose the subregion for A, itsIn each pixel 111 respectively corresponding described offset voltage be respectively Voffseta1、Voffseta2、Voffseta3……VoffsetAN, current applying on the liquid crystal cells of the each self-corresponding LCD of each described pixel in A subregionControl voltage and add respectively offset voltage separately, obtain the control voltage after upgrading, result is respectivelyVa0+Voffseta1、Va0+Voffseta2、Va0+Voffseta3……Va0+VoffsetAN, thereby by described in each A subregionThe color lumen ratio of pixel be all adjusted into A subregion in the color lumen ratio one of described reference pointCause. Suppose the subregion for B, wherein each pixel 111 respectively corresponding described offset voltage be respectivelyVoffsetb1、Voffsetb2、Voffsetb3……VoffsetBN, the each self-corresponding LCD of each described pixel in B subregionLiquid crystal cells on the current control voltage applying add respectively offset voltage separately, obtain upgrade after controlVoltage processed, result is respectively Vb0+Voffsetb1、Vb0+Voffsetb2、Vb0+Voffsetb3……Vb0+VoffsetBN, therebyBy the color lumen ratio of the each described pixel of B subregion be all adjusted into B subregion in described referenceThe color lumen ratio of point is consistent. Suppose the subregion for C, wherein each pixel 111 is corresponding respectivelyDescribed offset voltage is respectively Voffsetc1、Voffsetc2、Voffsetc3……VoffsetCN, each in C subregion described inOn the liquid crystal cells of the each self-corresponding LCD of pixel, the current control voltage applying adds respectively skew separatelyVoltage, obtains the control voltage after upgrading, and result is respectively Vc0+Voffsetc1、Vc0+Voffsetc2、Vc0+Voffsetc3……Vc0+VoffsetCN, thereby by equal the color lumen ratio of the each described pixel of C subregionBe adjusted into consistent with the color lumen ratio of the described reference point in C subregion. Suppose the subregion for D,Wherein each pixel 111 respectively corresponding described offset voltage be respectively Voffsetd1、Voffsetd2、Voffsetd3……VoffsetDN, current applying on the liquid crystal cells of the each self-corresponding LCD of each described pixel in D subregionControl voltage add respectively offset voltage separately, obtain upgrade after control voltage, result is respectivelyVd0+Voffsetd1、Vd0+Voffsetd2、Vd0+Voffsetd3……Vd0+VoffsetDN, thereby by described in each D subregionThe color lumen ratio of pixel be all adjusted into D subregion in the color lumen ratio one of described reference pointCause.
The said method of the embodiment of the present invention, according to the pixel value of described reference point and each described pixel,Obtain the pixel value of each described pixel is all adjusted into when consistent with the pixel value of described reference point, eachThe required deviant of currency difference of the each self-corresponding described control parameter of described pixel, and then by eachThe currency of the each self-corresponding described control parameter of described pixel adds respectively corresponding described deviant, justCan make the pixel value of each described pixel all be adjusted into consistent with the pixel value of described reference point, adjustJourney is simple, not only raises the efficiency, and reduces production costs.
Need to further illustrate, because described deviant is by expression formula Voffset＝a*log(Loutput/Ltarget) obtain, the pixel value L of wherein said reference pointtargetPixel value L with described pixeloutputAll can pass through step S13Detect and obtain, like this, can realize described deviant automatic acquisition by computer program, and thenRealize and automatically adjusting so that the LCD projecting apparatus color uniformity is consistent controlling parameter, further raise the efficiency,Reduce production costs.
As preferred embodiment, described LCD projecting apparatus color uniformity method of adjustment also comprises:
Step S16, return and carry out described pixel value detecting step, described deviant and obtain step according to preset timesRapid and described control parameter adjustment step. Particularly, as shown in Figure 4, judge whether current number of times reaches pre-If number of times, if do not arrive described preset times, returns and carries out described pixel value detecting step S13, described inclined to one sideThe value of moving obtaining step S14 and described control parameter adjustment step S15; If arrive described preset times, finishAdjust. Wherein, the initial value of described current number of times can be set to 0, often execute described light intensity detecting step,Described deviant obtaining step and described control parameter adjustment step, described current number of times adds 1. Need to illustrateBe, because the mode that adopts sectional curve matching obtains described adjustment coefficient, and by above-mentioned expression formulaVoffset＝a*log(Loutput/Ltarget) calculate the described deviant of acquisition, thereby be 1 in preset times described in practiceInferior or 2 times time, just can make the pixel value of each described pixel and the pixel value of described reference point consistentProperty is adjusted in the required scope of designing requirement, compared with existing manual adjustment process, has reduced adjustment timeNumber, not only efficiency is higher, and further reduces production costs.
Embodiment bis-
The embodiment of the present invention provides another LCD projecting apparatus color uniformity method of adjustment, in embodiment mono-The difference of described method of adjustment be: as shown in Figure 4, the described method of the present embodiment also comprise withLower step:
Step S17, each each described pixel self-corresponding described control parameter is all set gradually as each instituteState the value of adjusting the described control parameter that layer is corresponding, and the described pixel value detecting step of each corresponding execution,Described deviant obtaining step and described control parameter adjustment step. As described in step S11 and,In practice, the each self-corresponding described control parameter of each described pixel can be set to different values, everyIndividual described different value corresponding one adjusts layer. Described control parameter is set to how many different values,Can there is the adjustment number of plies of respective amount. Wherein said control parameter is the liquid of the LCD of described LCD projecting apparatusThe control voltage applying on brilliant unit. Those of ordinary skill in the art can arrange adjustment according to actual needsThe number of plies, for example, can apply with on corresponding LCD liquid crystal cells according to the color lumen ratio of described reference pointControl voltage relationship and the specific requirement of LCD projecting apparatus the adjustment number of plies is set, or can be rule of thumbThe adjustment number of plies is set.
In one example, supposing to arrange the adjustment number of plies is 3 layers, on the liquid crystal cells of every layer of corresponding LCDThe control magnitude of voltage applying is respectively V01、V02And V03. First, by each each described pixel self-corresponding LCDLiquid crystal cells on apply and control voltage V01, carry out successively described pixel value detecting step S13, described deviantObtaining step S14 and described control parameter adjustment step S15 (with step S16), thus voltage V controlled01On corresponding adjustment layer, the color lumen ratio of each described pixel is all adjusted into described reference pointColor lumen ratio is consistent.
Then, control voltage V by applying on the liquid crystal cells of the each self-corresponding LCD of each described pixel02，Carrying out successively described pixel value detecting step S13, described deviant obtaining step S14 and described control parameter adjustsThe rapid S15 of synchronizing (with step S16), thus voltage V controlled02On corresponding adjustment layer, by each described pictureThe color lumen ratio of vegetarian refreshments is all adjusted into consistent with the color lumen ratio of described reference point.
Finally, control voltage V by applying on the liquid crystal cells of the each self-corresponding LCD of each described pixel03，Carrying out successively described pixel value detecting step S13, described deviant obtaining step S14 and described control parameter adjustsThe rapid S15 of synchronizing (with step S16), thus voltage V controlled03On corresponding adjustment layer, by each described pictureThe color lumen ratio of vegetarian refreshments is all adjusted into consistent with the color lumen ratio of described reference point.
In another example, arranging equally and adjusting the number of plies is 3 layers, and supposes described projected image10 are divided into 4 sub regions, are respectively A subregion, B subregion, C subregion and D subregion. First adjustsThe control magnitude of voltage applying on the liquid crystal cells of the LCD that whole layer is corresponding is respectively Va01、Vb01、Vc01And Vd01, itsMiddle Va01The control magnitude of voltage applying on liquid crystal cells for the LCD of A subregion, Vb01For the LCD of B subregionLiquid crystal cells on the control magnitude of voltage that applies, Vc01The control applying on liquid crystal cells for the LCD of C subregionMagnitude of voltage processed, Vd01The control magnitude of voltage applying on liquid crystal cells for the LCD of D subregion; Correspondingly,Two adjust the control magnitude of voltage applying on the liquid crystal cells of the LCD that layer is corresponding is respectively Va02、Vb02、Vc02And Vd02，The 3rd adjusts the control magnitude of voltage applying on the liquid crystal cells of the LCD that layer is corresponding is respectively Va03、Vb03、Vc03WithVd03。
First, by difference on the liquid crystal cells of the each self-corresponding LCD of each described pixel in each sub regionsApply and control voltage Va01、Vb01、Vc01And Vd01, carry out successively described pixel value detecting step S13, described inclined to one sideThe value of moving obtaining step S14 and described control parameter adjustment step S15 (with step S16). Thereby controlling electricityPress Va01、Vb01、Vc01And Vd01On corresponding adjustment layer, by the color stream of each described pixel in A subregionBright ratio is all adjusted into consistent with the color lumen ratio of reference point described in A subregion, and by B subareaIn territory, the color lumen ratio of each described pixel is all adjusted into and the color of reference point described in B subregionLumen ratio is consistent, and the color lumen ratio of each described pixel in C subregion is all adjusted into and CThe color lumen ratio of reference point described in subregion is consistent, and by each described pixel in D subregionColor lumen ratio be all adjusted into consistent with the color lumen ratio of reference point described in D subregion.
Then, by difference on the liquid crystal cells of the each self-corresponding LCD of each described pixel in each sub regionsApply and control voltage Va02、Vb02、Vc02And Vd02, carry out successively described pixel value detecting step S13, described inclined to one sideThe value of moving obtaining step S14 and described control parameter adjustment step S15 (with step S16). Thereby controlling electricityPress Va02、Vb02、Vc02And Vd02On corresponding adjustment layer, by the color of each described pixel in A subregionLumen ratio is all adjusted into consistent with the color lumen ratio of reference point described in A subregion, and by BIn region, the color lumen ratio of each described pixel is all adjusted into and the look of reference point described in B subregionColor lumen ratio is consistent, and the color lumen ratio of each described pixel in C subregion is all adjusted intoConsistent with the color lumen ratio of reference point described in C subregion, and by each described picture in D subregionThe color lumen ratio of vegetarian refreshments is all adjusted into consistent with the color lumen ratio of reference point described in D subregion.
Finally, will on the liquid crystal cells of the each self-corresponding LCD of each described pixel in each sub regions, applyControl voltage Va03、Vb03、Vc03And Vd03, carry out successively described pixel value detecting step S13, described deviantObtaining step S14 and described control parameter adjustment step S15 (with step S16). Thereby controlling voltage Va03、Vb03、Vc03And Vd03On corresponding adjustment layer, by the color lumen ratio of each described pixel in A subregionAll be adjusted into consistent with the color lumen ratio of reference point described in A subregion, and by every in B subregionThe color lumen ratio of individual described pixel is all adjusted into the color lumen ratio with reference point described in B subregionExample is consistent, and the color lumen ratio of each described pixel in C subregion is all adjusted into the subarea with CThe color lumen ratio of reference point described in territory is consistent, and by the look of each described pixel in D subregionColor lumen ratio is all adjusted into consistent with the color lumen ratio of reference point described in D subregion.
According to the said method of the embodiment of the present invention, by each each described pixel self-corresponding described control ginsengNumber all sets gradually the value into adjusting the described control parameter that layer is corresponding described in each, and each corresponding executionDescribed pixel value detecting step, described deviant obtaining step and described control parameter adjustment step, to LCDThe projecting apparatus color uniformity adopts layering adjustment, the liquid crystal of the each self-corresponding LCD of each so described pixelWhile applying different control voltage on unit, can obtain corresponding offset voltage, thus make each described inThe color lumen ratio of pixel is all adjusted into consistent with the color lumen ratio of described reference point. As can be seen hereBy adopting layering adjustment, can make the better effects if that the LCD projecting apparatus color uniformity is adjusted.
Embodiment tri-
Fig. 6 shows a kind of LCD projecting apparatus color adjusting device for uniformity that the embodiment of the present invention provides, instituteStating device comprises:
Pixel acquisition module M11, for obtaining several pixels from the projected image of described LCD projecting apparatus,And from described several pixels, obtaining a reference point, the pixel value of each described pixel is corresponding separatelyOne of described LCD projecting apparatus is controlled parameter, and the value corresponding of described control parameter is adjusted layer.
Control parameter module M12 is set, for by equal each each described pixel self-corresponding described control parameterBe set to the current value of adjusting the described control parameter that layer is corresponding.
Pixel value detection module M13, for detection of the pixel value of each described pixel.
Deviant acquisition module M14, for according to the pixel value of described reference point and each described pixel, obtainsGet the currency of the each self-corresponding described control parameter of each described pixel and distinguish required deviant to incite somebody to action oftenThe pixel value of individual described pixel is all adjusted into consistent with the pixel value of described reference point. Described deviant basisFollowing formula obtains:
Voffset＝a*log(Loutput/Ltarget)
Wherein a is for adjusting coefficient, LtargetFor the pixel value of described reference point, LoutputFor the pixel of described pixelValue. Wherein said adjustment coefficient obtains by the mode of sectional curve matching.
Control parameter adjustment module M15, for by the each self-corresponding described control parameter of each described pixelCurrency adds respectively corresponding described deviant, to obtain the control parameter after renewal.
The said apparatus of the embodiment of the present invention, according to the pixel value of described reference point and each described pixel,Obtain the pixel value of each described pixel is all adjusted into when consistent with the pixel value of described reference point, eachThe required deviant of currency difference of the each self-corresponding described control parameter of described pixel, and then by eachThe currency of the each self-corresponding described control parameter of described pixel adds respectively corresponding described deviant, justCan make the pixel value of each described pixel all be adjusted into consistent with the pixel value of described reference point, adjustJourney is simple, not only raises the efficiency, and reduces production costs.
Need to further illustrate, because described deviant is by expression formula Voffset＝a*log(Loutput/Ltarget) obtain, the pixel value L of wherein said reference pointtargetPixel value L with described pixeloutputAll can pass through step S13Detect and obtain, like this, can realize described deviant automatic acquisition by computer program, and thenRealize and automatically adjusting so that the LCD projecting apparatus color uniformity is consistent controlling parameter, further raise the efficiency,Reduce production costs.
As preferred embodiment, described device also comprises further adjusting module M16. Described further tuneMould preparation piece M16 carries out described pixel value detection module for returning according to preset times, described deviant is obtainedModule and described control parameter adjustment module. It should be noted that, owing to adopting the mode of sectional curve matchingObtain described adjustment coefficient, and by above-mentioned expression formula Voffset＝a*log(Loutput/Ltarget) the described skew of calculating acquisitionValue, thereby in the time that preset times described in practice is 1 time or 2 times, just can make each described pixelPixel value and the pixel value uniformity of described reference point be adjusted in the required scope of designing requirement, not onlyEfficiency is higher, and further reduces production costs.
Embodiment tetra-
The embodiment of the present invention provides another LCD projecting apparatus color uniformity method of adjustment, in embodiment mono-The difference of described method of adjustment be: as shown in Figure 6, the described device of the present embodiment also comprises pointLayer adjusting module M17.
Described layering adjusting module M17 is used for equal each each described pixel self-corresponding described control parameterSet gradually the value for adjusting the described control parameter that layer is corresponding described in each, and described in each corresponding executionPixel value detection module, described deviant acquisition module and described control parameter adjustment module.
According to the said apparatus of the embodiment of the present invention, by each each described pixel self-corresponding described control ginsengNumber all sets gradually the value into adjusting the described control parameter that layer is corresponding described in each, and each corresponding executionDescribed pixel value detecting step, described deviant obtaining step and described control parameter adjustment step, to LCDThe projecting apparatus color uniformity adopts layering adjustment, the liquid crystal of the each self-corresponding LCD of each so described pixelWhile applying different control voltage on unit, can obtain corresponding offset voltage, thus make each described inThe color lumen ratio of pixel is all adjusted into consistent with the color lumen ratio of described reference point. As can be seen hereBy adopting layering adjustment, can make the better effects if that the LCD projecting apparatus color uniformity is adjusted.
One of ordinary skill in the art will appreciate that all or part of step that realizes above-described embodiment can pass throughHardware completes, and also can carry out the hardware that instruction is relevant by program and complete, and described program can be stored inIn a kind of computer-readable recording medium, the above-mentioned storage medium of mentioning can be read-only storage, disk orCD etc.
It should be noted that, each embodiment in this description adopts the mode of going forward one by one to describe, each enforcementWhat example stressed is all and the difference of other embodiment, identical similar part between each embodimentMutually referring to. For device class embodiment, because it is substantially similar to embodiment of the method, soThat describes is fairly simple, and relevant part is referring to the part explanation of embodiment of the method.
Below be only preferred embodiment of the present invention, not the present invention done to any pro forma restriction,Although the present invention discloses as above with preferred embodiment, but not in order to limit the present invention, this area is commonTechnical staff is not departing within the scope of technical solution of the present invention, when the technology contents that can utilize above-mentioned announcement is madeA little change or be modified to the equivalent embodiment of equivalent variations, is not depart from technical solution of the present invention content in every case,Any simple modification, equivalent variations and the modification above embodiment done according to technical spirit of the present invention,All still belong in the scope of technical solution of the present invention.
Claims (10)
1. a LCD projecting apparatus color uniformity method of adjustment, is characterized in that, described method comprises:
Pixel obtaining step, obtains several pixels from the projected image of described LCD projecting apparatus, and fromIn described several pixels, obtain a reference point, the pixel value of each described pixel is separately described in correspondenceOne of LCD projecting apparatus is controlled parameter, and the value corresponding of described control parameter is adjusted layer;
Control parameter setting steps, each each described pixel self-corresponding described control parameter is all set toThe current value of adjusting the described control parameter that layer is corresponding;
Pixel value detecting step, detects the pixel value of each described pixel;
Deviant obtaining step, according to the pixel value of described reference point and each described pixel, obtains eachThe currency of the each self-corresponding described control parameter of described pixel respectively required deviant with by described in eachThe pixel value of pixel is all adjusted into consistent with the pixel value of described reference point;
Control parameter adjustment step, by the currency of the each self-corresponding described control parameter of each described pixelAdd respectively corresponding described deviant, to obtain the control parameter after renewal.
2. LCD projecting apparatus color uniformity method of adjustment according to claim 1, is characterized in that,Described method also comprises:
According to preset times return carry out described pixel value detecting step, described deviant obtaining step and described inControl parameter adjustment step.
3. LCD projecting apparatus color uniformity method of adjustment according to claim 1, is characterized in that,Described method also comprises:
Each each described pixel self-corresponding described control parameter is all set gradually as adjusting layer described in eachThe value of corresponding described control parameter, and the described pixel value detecting step of each corresponding execution, described skewValue obtaining step and described control parameter adjustment step.
4. according to the LCD projecting apparatus color uniformity method of adjustment described in claim 1-3 any one, its spyLevy and be, described deviant obtains according to following formula:
Voffset＝a*log(Loutput/Ltarget)
Wherein a is for adjusting coefficient, LtargetFor the pixel value of described reference point, LoutputFor the pixel of described pixelValue.
5. LCD projecting apparatus color uniformity method of adjustment according to claim 4, is characterized in that,Described adjustment coefficient obtains by the mode of sectional curve matching.
6. a LCD projecting apparatus color adjusting device for uniformity, is characterized in that, described device comprises:
Pixel acquisition module, for obtaining several pixels from the projected image of described LCD projecting apparatus,And from described several pixels, obtaining a reference point, the pixel value of each described pixel is corresponding separatelyOne of described LCD projecting apparatus is controlled parameter, and the value corresponding of described control parameter is adjusted layer;
Control parameter module is set, for each each described pixel self-corresponding described control parameter is all establishedBe set to the current value of adjusting the described control parameter that layer is corresponding;
Pixel value detection module, for detection of the pixel value of each described pixel;
Deviant acquisition module, for according to the pixel value of described reference point and each described pixel, obtainsThe currency of the each self-corresponding described control parameter of each described pixel respectively required deviant with by eachThe pixel value of described pixel is all adjusted into consistent with the pixel value of described reference point;
Control parameter adjustment module, for working as the each self-corresponding described control parameter of each described pixelFront value adds respectively corresponding described deviant, to obtain the control parameter after renewal.
7. LCD projecting apparatus color adjusting device for uniformity according to claim 6, is characterized in that,Also comprise:
Further adjusting module, for return according to preset times carry out described pixel value detection module, described inDeviant acquisition module and described control parameter adjustment module.
8. LCD projecting apparatus color adjusting device for uniformity according to claim 6, is characterized in that,Also comprise:
Layering adjusting module, for all establishing each each described pixel self-corresponding described control parameter successivelyBe set to a value of adjusting the described control parameter that layer is corresponding described in each, and the described pixel value of each corresponding executionDetection module, described deviant acquisition module and described control parameter adjustment module.
9. according to the LCD projecting apparatus color adjusting device for uniformity described in claim 6-8 any one, its spyLevy and be, described deviant obtains according to following formula:
Voffset＝a*log(Loutput/Ltarget)
Wherein a is for adjusting coefficient, LtargetFor the pixel value of described reference point, LoutputFor the pixel of described pixelValue.
10. LCD projecting apparatus color adjusting device for uniformity according to claim 9, is characterized in that,Described adjustment coefficient obtains by the mode of sectional curve matching.
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