CN110278421A - Show equipment and display methods - Google Patents
Show equipment and display methods Download PDFInfo
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- CN110278421A CN110278421A CN201810219582.0A CN201810219582A CN110278421A CN 110278421 A CN110278421 A CN 110278421A CN 201810219582 A CN201810219582 A CN 201810219582A CN 110278421 A CN110278421 A CN 110278421A
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
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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]
-
- 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
- H04N9/315—Modulator illumination systems
- H04N9/3161—Modulator illumination systems using laser light sources
-
- 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
Abstract
A kind of display equipment includes light supply apparatus, image data processing module, optic modulating device and image synthesizer.Light supply apparatus issues the first light and the second light.Image data processing module receives the raw image data of a width image to be displayed, the raw image data of the width image to be displayed is the image data based on the second gamut range and the original control signal value including each pixel m kind color, second gamut range covers the first gamut range and has the part beyond the first gamut range, the original control signal value of the m kind color of each pixel of the raw image data of the width image to be displayed is also mapped as m the first correcting controlling signal values of corresponding first light and n the second correcting controlling signal values of corresponding second light by image data processing module.Optic modulating device modulates the second light and obtains the second image light according to m the first correcting controlling signal values the first light of modulation the first image lights of acquisition of each pixel and n the second correcting controlling signal values according to each pixel.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of display equipment and display methods.
Background technique
Colour gamut be often referred to human eye in nature it can be seen that visible light spectrum locus, it is seen that the constituted area of spectrum locus
The area in domain be human eye it can be seen that visible light maximum gamut area.Currently, the projector constituted with different display devices,
It is all to show equipment using R, G, B three primary colours that the displays such as display, which are started to write, carries out color rendition reproduction to image.It is specified at one
Chrominance space show that the formed triangle of R, G, B three primary colours of equipment is known as the equipment energy such as CIE1931xy chrominance space
The colour gamut enough shown, color gamut space area is bigger, then people feel that the color picture presented is more bright-coloured, more true to nature, however, how
So that the display that wider color gamut may be implemented in the display equipment is a kind of important technical task of industry.
Summary of the invention
In view of this, the present invention provides the display equipment and display methods of a kind of achievable wider color gamut.
A kind of display equipment comprising:
Light supply apparatus, for issuing the first light and the second light, first light is used to modulate the image of the first gamut range,
Second light is used to cooperate the image other than the first gamut range described in the described first smooth common modulation, and first light includes
M kind color of light, second light include the n kind color of light in m kind color of light, and m is more than or equal to n；
Image data processing module, for receiving the raw image data of a width image to be displayed, the width image to be displayed
Raw image data be the image data based on the second gamut range and the original control signal including each pixel m kind color
Value, second gamut range covers first gamut range and has the part beyond first gamut range, described
Image data processing module is also used to the original control of the m kind color of each pixel of the raw image data of the width image to be displayed
Signal value processed is mapped as the correcting controlling signal value of (m+n) kind color to obtain the correction picture number of the width image to be displayed
According in the image correcting data, the correcting controlling signal value of (m+n) kind color of each pixel includes corresponding first light
N the second correcting controlling signal values of m the first correcting controlling signal values and corresponding second light；And
Optic modulating device, for receive the image correcting data, according to the image correcting data each pixel m
First correcting controlling signal value modulates first light and obtains the first image light and each picture according to the image correcting data
N the second correcting controlling signal values of element modulate second light and obtain the second image lights, the first image light and described the
Two image lights are also synthesized to show the width image.
A kind of display methods comprising following steps:
The first light and the second light are provided, first light is used to modulate the image of the first gamut range, and second light is used
In cooperating the image other than the first gamut range described in the first smooth common modulation, first light includes m kind color of light, institute
Stating the second light includes the n kind color of light in m kind color of light, and m is more than or equal to n；
Receive the raw image data of a width image to be displayed, the raw image data of the width image to be displayed is based on the
The image data of two gamut ranges and original control signal value including each pixel m kind color, the second gamut range covering
First gamut range and have beyond first gamut range part；
The original control signal value of the m kind color of each pixel of the raw image data of the width image to be displayed is mapped as
(m+n) the correcting controlling signal value of color is planted to obtain the image correcting data of the width image to be displayed, the correction image
In data, the correcting controlling signal value of (m+n) kind color of each pixel includes m the first Corrective controls of corresponding first light
N the second correcting controlling signal values of signal value and corresponding second light；And
Receive the image correcting data, a first Corrective controls letter of m according to each pixel of the image correcting data
Number value modulates n the second schools that first light obtains the first image light and each pixel according to the image correcting data
Positive control signal value modulates second light and obtains the second image light, and the first image light and second image light are also closed
At to show the width image.
Compared with prior art, it the invention shows in equipment and display methods, due to increasing by second light, and goes back
The raw image data of the width image is converted to m the first correcting controlling signals for respectively corresponding first light and the second light
Value and n the second correcting controlling signal values, and then according to the m the first correcting controlling signal values and n the second Corrective controls
Signal value modulates first light and second light respectively can obtain the first image light and the second image light, and width may be implemented
The display of the image data of colour gamut, and can guarantee to show the accurate reproduction of image, the display equipment is shown with using described
Show that the colour gamut of the display equipment of method is wider, display effect is preferable.
Further, in a kind of implementation, when calculating described correcting controlling signal value r, g, b, rl, gl, by making
It is described to take rl2+gl2Each data value of r, g, b, rl, gl when minimum, can make to the corresponding red laser of described rl, gl with it is green
Color laser using less, and then reduce cost of light source.
Detailed description of the invention
Fig. 1 is the gamut range comparison chart of several display equipment using different light sources.
Fig. 2 is a kind of light-source structure schematic diagram for showing equipment.
Fig. 3 is the light-source structure schematic diagram of another display equipment.
Fig. 4 a and Fig. 4 b is that Fig. 2 and the pure color laser shown in Fig. 3 for showing equipment addition different proportion are achieved respectively
Gamut range schematic diagram.
Fig. 5 a and Fig. 5 b is in a kind of gamut range schematic diagram achieved of the display equipment using dynamic gamut.
Fig. 6 is the block diagram of the display equipment of a better embodiment of the invention.
Fig. 7 is the gamut range schematic diagram of display equipment shown in Fig. 6.
Fig. 8 is the part concrete structure schematic diagram of display equipment shown in Fig. 6.
Fig. 9 is the modulation timing figure that the two spaces optical modulator of equipment is shown described in Fig. 6.
Figure 10 is the flow diagram of the display methods of display equipment shown in fig. 6.
Figure 11 is the technology colour gamut and color volume expansion schematic diagram of display equipment shown in Fig. 6.
Main element symbol description
Show equipment 600
Light supply apparatus 610
Image data processing module 620
Optic modulating device 630
First light source 611
Second light source 612
Laser light source 615,616
Polarization converter 617
Wavelength light combination element 618
Induction element 619a, 619b
First spatial light modulator 631
Second space optical modulator 632
Image synthesizer 640
First gamut range F1
Second gamut range F2
The present invention that the following detailed description will be further explained with reference to the above drawings.
Specific embodiment
Laser projection etc. shows that the light source of equipment is generally divided into three categories, one kind be by the laser excitation of short wavelength not
The primary lights of red-green-blue are generated with the fluorescent powder of color.It is another kind of directly using redgreenblue laser as three bases
Color light source.Third class is the combination of preceding two class, and general blue laser light source had both been used as the excitation light source excitated fluorescent powder of short wavelength
To generate red green primary light, itself is again as blue primary lights.These three different realization technologies respectively have advantage and disadvantage.For swashing
Light excitated fluorescent powder or laser fluorescence mixing scheme because the Several problems of evaluating laser beam quality of unstable of gallium nitride substrates have it is high-efficient,
The characteristics of service life is long, the operation is stable has the service life long, efficiency using the scheme of blue semiconductor laser excitated fluorescent powder colour wheel
Height, equipment are stablized, feature at low cost.But since the frequency spectrum of the fluorescence (Laser phospher) of fluorescent powder excitation is wider,
Thus cause the colour gamut of this scheme narrow.Display equipment generally using this technology can cover complete sRGB colour gamut,
It is handled by some enhancings, such as the yellow spectrum being added in the optical filter removal green light and feux rouges of narrowband, its color can be enhanced
Domain reaches DCI-P3 colour gamut.But narrow-band filtering can lose sizable brightness, so that the efficiency of display equipment is significantly
It reduces.Using the display equipment of pure RGB laser, because RGB laser has good monochromaticjty, thus there is very wide color
Domain range.REC2020 gamut standards can be easily reached using the display equipment (such as optical projection system) of RGB laser, about aforementioned
The colour gamut comparison chart of several display equipment please refers to Fig. 1.
However, there is also shortcomings for RGB laser display apparatus (such as projector).First is speckle.Speckle is due to swashing
The coherence of light, the phase difference for causing the light reflected on display plane to be generated due to the fluctuating of plane are caused to interfere, cause to show
Show that the uneven of Luminance Distribution occurs in picture.Although there is many inventions to attempt to solve the problems, such as laser speckle, effect is not
It is ideal.Second is the at high cost of RGB laser display apparatus.This is because the red and green laser in RGB laser display apparatus is in mesh
It is also immature under preceding technology.The efficiency of Diode Green Laser can only accomplish at present 20% hereinafter, far below gallium nitride substrate
Blue laser and ternary substrate red laser, and cost is very high.Although and red laser efficiency can accomplish and Lan Jiguang
Almost, but the temperature stability of red laser is poor, and not only its efficiency significantly reduces as the temperature increases, but also central wavelength
Also it can drift about.This two o'clock, which varies with temperature RGB laser display apparatus, will appear colour cast.This is just needed to red laser
Increase thermostat to stablize the working condition of red laser, this also means that it is red sharp to guarantee to need powerful cooling device
The operating temperature of light is stablized, to considerably increase the cost of RGB laser display apparatus.
A kind of light source 200 of basic LASER Excited Fluorescence powder wheel is as shown in Fig. 2, the shortwave that exciting light sources 210 issue
Fluorescent powder on long excited by visible light colour wheel 220 is to generate the primary lights or white light of timing.Since the frequency spectrum of fluorescence is wider, so that
Colour gamut covering based on this system is narrow.A kind of method of improved enhancing colour gamut is as shown in Figure 3.Excitation light source 310 issues
Short-wavelength visible light primary lights are converted by colour wheel 320 and narrowband colour purity is obtained more by the synchronous filtering of filtering device 330
High primary lights are with the colour gamut of expanded laser light fluorescence.Filtering device can bring additional optical power loss, make the effect for showing equipment
Rate reduces.
Red green laser by mixing pure color into laser fluorescence is also capable of the colour gamut of expansion light source.As mentioned in a kind of technology
The incorporation mentioned in the implementation that can mix a kind of pure color laser in laser fluorescence system out, and another technology
One or two kinds of optical path implementations etc..Although incorporation pure color laser is capable of the colour gamut of expanded laser light fluorescence, there is no needle
To the modulation that display content matches light source, the gamut range that can enhance is limited.As shown in figure 4, fluorescent brightness is added
On the basis of the mixed light (mix gamut) of 20% pure color laser (as shown in fig. 4 a), if necessary by the colour gamut of laser fluorescence
DCI-P3 standard is expanded to, needs that the pure color laser formation mixed light (as shown in Figure 4 b) for being equivalent to fluorescent brightness 40% is added.
Compared to the scheme of fluorescence plus colour filter, the display equipment of this scheme it is more efficient, but need to be added powerful red green
Laser results in the increase of system cost.
In addition, a kind of use dynamic color of brightness for dynamically adjusting laser and fluorescence and then analyzing image
The display equipment in domain, can also increase system effectiveness.Since picture always has certain brightness, and fluorescence and laser are in sky
Between system of the light combination to form a three primary colours before optical modulator, blue primary color therein is from blue laser, green
The light combination for the ratio that primary colours are given from green fluorescence and green laser in dynamic control signal, red primaries are from red
The light combination of fluorescence and red laser in proportion.Since the maximum brightness of picture is usually not zero, and the intensity of fluorescence is according to institute
The maximum brightness setting of picture is stated, and the bright field information of picture usually has a large amount of white light ingredient, thus this dynamic gamut
Method fluorescent brightness can not be completely turned off, so that the method for this dynamic gamut not fully reaches Rec.2020 standard
Colour gamut, referring to Fig. 5, Fig. 5 is the schematic diagram of gamut range that can be reached using the display equipment of dynamic gamut, wherein Fig. 5 a
It is the red laser and the gamut range schematic diagram that can reach of green laser in Fluorescent dye incorporation 20%, Fig. 5 b is in Fluorescent dye incorporation
The gamut range schematic diagram that 40% red laser and green laser can reach, it is seen then that Fig. 5 a and Fig. 5 b are more difficult to be reached completely
To the gamut range of Rec.2020 standard.
Referring to Fig. 6, Fig. 6 is the block diagram of the display equipment 600 of a better embodiment of the invention.The display
Equipment 600 includes light supply apparatus 610, image data processing module 620, optic modulating device 630 and image synthesizer 640.
The light supply apparatus 610 is for issuing the first light and the second light, and first light is for modulating the first gamut range
The image of F1, second light are used to cooperate the image other than the first gamut range F1 described in the described first smooth common modulation, institute
Stating the first light includes m kind color of light, and second light includes the n kind color of light in m kind color of light, and m is more than or equal to n.Specifically,
First light also may include fluorescence, and m can be 3, and first light includes three primary colours light, such as three kinds of color of light of RGB,
Wherein, in first light, the blue light can be laser, and the green light and the red light are fluorescence, described glimmering
Light can excite fluorescent material (such as red fluorescence material and green fluorescent material by blue laser；Or yellow fluorescent material) produce
It is raw.Second light may include red light and green light, and the red light and the green light can be laser, that is, n can
Think 2, two kinds of color of light of second light can be respectively red laser and green laser.
It is appreciated that as previously mentioned, the gamut range that first light can be shown is the first gamut range F1, such as Fig. 7
Shown, the first gamut range F1 can be DCI gamut range, such as gamut range DCI-P3, if therefore image to be displayed be
The image of first gamut range F1, second light can be 0, and the first colour gamut model can be shown by only modulating first light
Enclose the image of F1.Further, in first light, since the red light and the green light are fluorescence, and second light
The gamut range that laser including red laser and green laser, therefore second light can be shown is wider than in first light
The gamut range that can show of fluorescence, specifically, first light and second light can be shown jointly beyond described the
The image of one gamut range specifically can by modulating the red green laser of blue laser and second light in first light
To show that (the red green fluorescence in first light can be at this time for image that colour gamut is located on the second boundary line gamut range F2
0), wherein the second gamut range F2 covers the first gamut range F1 and has beyond the first gamut range F1
Part, the second gamut range F2 can be REC gamut range, such as gamut range REC.2020；Further, for colour gamut
Image positioned at the boundary line of the boundary line and the second gamut range F2 of the first gamut range F1, can pass through modulation
Blue laser, red green fluorescence in first light are shown jointly with the red green laser in second light, in first light
Blue laser, the red green laser in red green fluorescence and second light can not be 0.
Specifically, the light supply apparatus 610 includes first light source 611 and second light source 612, and the first light source 611 is used
In issuing first light, for the second light source for issuing second light, the first light source 611 may include exciting light
Source and Wavelength converter, the excitation light source issue exciting light, and the Wavelength converter has fluorescent material and for connecing
It receives the exciting light and issues first light, first light includes fluorescence, and the second light source includes laser light source, described
Second light includes laser.
Described image data processing module 620 is used to receive the raw image data of a width image to be displayed, which waits showing
The raw image data of diagram picture is the image data based on the second gamut range F2 and the original including each pixel m kind color
Beginning control signal value, described image data processing module 620 are also used to each of the raw image data of the width image to be displayed
The correcting controlling signal value that the original control signal value of the m kind color of pixel is mapped as (m+n) kind color waits for obtain the width
Show the image correcting data of image.Specifically, in the image correcting data, the correction control of (m+n) kind color of each pixel
Signal value processed includes m the first correcting controlling signal values of corresponding first light and n the second schools of corresponding second light
Positive control signal value.
It is possible, firstly, to understand, the raw image data can be using different coding lattice such as RGB coding, YUV codings
Formula, wherein different coding format can correspond to different color spaces, in present embodiment, mainly by the original image number
Correction control is calculated according to tristimulus values X, Y, the Z for being converted to the color space defined by xyY colour gamut coordinate with 1937 standard of CIE
Signal value processed, specifically, CIE 1937 define the absolute color and face that any human eye can be differentiated with a three-dimensional vector
The brightness of color is not converted with the transformation of colour gamut, therefore can be calculated and be obtained according to the original control signal value of the pixel
The pixel tristimulus values X, Y, Z with according to the first correcting controlling signal value of the pixel and the second correcting controlling signal
Tristimulus values X, Y, the Z for the pixel that value calculating obtains equal principle, the original control signal value meter according to each pixel
Calculate corresponding first correcting controlling signal value and the second correcting controlling signal value.
For example, if the original control signal value of the m kind color of each pixel is R, G, B, the m first correction control
Signal value processed is r, g, b, and the n the second correcting controlling signal values are rl, gl, the original control signal value according to the pixel
R, tristimulus values X, Y, Z and first correcting controlling signal value r, g, b according to the pixel that G, B calculate the pixel obtained
And second correcting controlling signal value rl, gl calculate the equal principle of tristimulus values X, Y, Z of the pixel obtained, described image
Original control signal value R, G, B of each color of the raw image data of the width image will be mapped as (m+ by data processing module
N) correcting controlling signal value r, g, b, rl, gl of color is planted to obtain the image correcting data of the width image to be displayed.
Wherein, described original control signal value R, G, B are converted to the mapping of correcting controlling signal value r, g, b, rl, gl
Cheng Zhong, described original control signal value R, G, B be it is known, by the mapping equation of tristimulus values can obtain numerous r, g,
B, the solution of rl, gl, at this point, in 0 to the M maximum gray model for guaranteeing that r, g, b, rl, gl can be shown in the display equipment
On the basis of in enclosing, rl is selected2+gl2The value of r, g, b, rl, gl when minimum as the correcting controlling signal value r, g, b, rl,
Gl, it is hereby achieved that most suitable r, g, b, rl, gl value.Simultaneously as the rl2+gl2Minimum thereby may be ensured that correspondence
Rl, gl of second light are smaller, to realize the displaying of the colour gamut of described image using least second light, not only accurately
Also original image can also reduce the use of second light, reduce cost of light source.
Wherein, below mainly to the raw image data be RGB coded format when, how the m kind according to each pixel
The original control signal value of color is that R, G, B acquisition corresponding correcting controlling signal value r, g, b, rl, gl are described in detail.Tool
Body, when the raw image data is the image data of RGB coded format, when the m kind color is red-green-blue, institute
State original control signal value R, G, B red original gray-scale value R, green original gray-scale value G and blue original gray-scale value B respectively, institute
State the first correcting controlling signal value be r, g, b be respectively corresponding first light red fluorescence the correction of red first grayscale value r, right
The blue first for answering the green first of the green fluorescence of the first light to correct the blue laser of grayscale value g and corresponding first light corrects
Grayscale value b, the second correcting controlling signal value rl, gl are respectively that the red second of the red laser of corresponding second light corrects ash
Rank value rl, corresponding second light green laser the correction of green second grayscale value gl.Further, in the display equipment, institute
Binary coded format can be all made of by stating original gray-scale value R, G, B and described correction grayscale value r, g, b, rl, gl, such as N
Binary coding, then the grey level M and N pairs of the binary-coded digit that display each color of equipment can be shown
It answers, i.e., described original gray-scale value R, G, B and described correction grayscale value r, g, b, rl, gl are in the range of [0 to M], wherein M=
2N-1.For example, as N=8, the grey level of the display equipment is 256, described original gray-scale value R, G, B and institute
Correction grayscale value r, g, b, rl, gl are stated in the range of [0 to 255], and wherein grayscale value represents the color for 0 and completely closes, ash
Rank value 255 indicates that the color is shown with maximum brightness.
Further, different according to the gamut range of the raw image data, RGB three primary colours are also different.This embodiment party
In formula, the raw image data is the image data of the second gamut range F2, if the three primary colours of the second gamut range F2
r0、g0、b0Color and brightness in the xyY colour gamut coordinate in 1937 color space of CIE meet following equation 1.
It is appreciated that for raw image data, the second gamut range F2 is known, therefore the r0、
g0、b0XyY colour gamut coordinate be also known.When second gamut range is 2020 gamut range of REC, the r0、g0、
b01937 color space of CIE xyY colour gamut coordinate be respectively (0.708,0.292,0.2627), (0.17,0.797,
0.6780), (0.131,0.046,0.0593).
Further, the original gray-scale value (R, G, B) of each color of each pixel is transformed into CIE 1937 color sky
Between middle calculating tristimulus values (X, Y, Z) when, the tristimulus values (X, Y, Z) meets following equation 2.
Wherein, in formula 2, as previously mentioned, M is the grey level of the display equipment.Further, according to described second
Three primary colours r of gamut range0、g0、b0XyY colour gamut coordinate (ginseng formula 1) it is found that the Matrix C meets following equation 3.
Further, due to having used the m kind color of light of the first light and the n kind color of light of the second light the invention shows equipment
Five primary systems, the five primary colours r0,g0,b0,rl0, and gl0Respectively represent red fluorescence in the first light, green in the first light
The color of the green laser in the red laser and the second light in blue laser, the second light in fluorescence, the first light and brightness, five base
Color r0,g0,b0,rl0, and gl0Meet following equation 4 in the xyY colour gamut coordinate in 1937 color space of CIE.
It is appreciated that after any one colour brightness in the space CIE can have this five kinds of primary lights to modulate by brightness ratio
Light combination forms, the five primary colours r0,g0,b0,rl0, and gl0Known to being also possible to, as issued according to the light supply apparatus 610
First light and second light determine.Further, acquisition is calculated according to original gray-scale value R, G, B of each pixel
Tristimulus values X, Y, Z of the pixel with according to the pixel first correct grayscale value r, g, b and second correction grayscale value rl,
Gl calculates the equal principle of tristimulus values X, Y, Z of the pixel obtained, correction grayscale value r, g, b, rl, gl satisfaction with
Lower formula 5.
Further, according to formula 4, the transition matrix C ' meets following equation 6.
It is obtained since described tristimulus values X, Y, Z can be calculated according to raw image data, the transition matrix C ' can also
According to five primary colours r0,g0,b0,rl0, and gl0It obtains, therefore, according to the formula 5, described correction grayscale value r, g, b, rl, gl
It is of virtually infinite multiple groups solution.To realize unique five primary colours corresponding correction grayscale value r, g, b, rl, gl, to the correction
The solution of grayscale value r, g, b, rl, gl need to be added additional limitation.
Specifically, in one embodiment, correction grayscale value r, g, b, rl, gl two of them amount can be randomly assigned
Brightness, then seek the value of other three amounts.It should be noted that the value range of five control signals is all between 0 and 255, with
Two values that machine is chosen may make range of its excess-three value solved beyond value, so the method randomly selected is not
It is the most preferred embodiment.In another embodiment, the luminance square and minimum rl of red green laser can be made2+gl2
Minimum seeks min (rl2+gl2)。
Firstly, formula (5) can be transformed to following equation 7 by us.
Wherein, parameter A, B meets following equation 8 and 9 respectively.
Further, to solve r, g, b, rl, gl, formula 7 is converted, following equation 10 can be obtained.
Further, to make rl2+gl2Minimum, i.e. demand solution min (rl2+gl2), that is, demand solution
Defined function f (rl, gl), wherein the function f (rl, gl) meets following equation 11.
Further, to solve function f (rl, gl), the r, the partial differential of g, b can be madeIt is minimum, that is, the r, g, b
Partial differentialMeet following equation 12.
Further, by the matrix in formula 10 into rewriting, available following equation 13.
The formula 12 then can be rewritten as following equation 14.
Wherein, meet following equation 15 and formula 16 respectively according to formula 13, the parameter D and d.
It is rewritten by matrix and obtains formula 13, since parameter A, B can pass through five primary colours r of formula 40,g0,b0,rl0, and
gl0Colour gamut coordinate xyZ and formula 2 tristimulus values XYZ calculate obtain, therefore the parameter T and its parameter t11, t12,
T13, t14, t21, t22, t23, t24 can be known, further by parameter number t11, t12, t13, t14, t21, t22, t23, t24
Formula 15 and formula 16 are substituted into, the numerical value of parameter D and d can be obtained, to obtain first correction grayscale value r, g, b, then will
R, the value of g, b bring the value that formula 7 can correct grayscale value rl and gl in the hope of second into.If the colour brightness of color has been more than five
The range that primary colours colour gamut can indicate, then the grayscale value of five primary colours will appear off-limits numerical value, do simple truncation, tool
Body, the grayscale value more than M is replaced with M, and the grayscale value lower than 0 is replaced with 0.
It seen from the above description, will after the raw image data of the reception of the described image data processing module 620 width image
Original control signal value R, G, B of the m kind color of each pixel are converted to corresponding correcting controlling signal value r, g, b, rl, gl,
To obtain the image correcting data, the image correcting data is also provided to light by described image data processing module 620
Modulating device 630.
The optic modulating device 630 is for receiving the image correcting data, each picture according to the image correcting data
M first correcting controlling signal value r, g, b of element modulate first light and obtain the first image light and according to the correction chart
Second light, which is modulated, as n the second correcting controlling signal values rl, gl of each pixel of data obtains the second image light.
In present embodiment, the optic modulating device 630 includes the first spatial light modulator 631 and second space light modulation
Device 632, first spatial light modulator 631 are used for m first correction control of each pixel according to the image correcting data
Signal value processed modulates first light and obtains the first image light, and the second space optical modulator 632 is used for according to described in
N the second correcting controlling signal values of each pixel of image correcting data modulate second light and obtain second image light.
Further, the first image light that the optic modulating device 630 generates can be closed with second image light via image
It synthesizes at device 640 to show the width image.It is appreciated that first spatial light modulator 631 and the second space light
Modulator 632 can be DMD spatial light modulator, Lcos spatial light modulator and LCD spatial light modulator etc..It is appreciated that
In the present embodiment, the optic modulating device 630 includes first spatial light modulator 631 and the second space light tune
Device 632 processed modulates first light and second light respectively, but in change embodiment, the optic modulating device 630
It also may include a spatial light modulator, the first light described in time division modulation and second light, details are not described herein again.
Referring to Fig. 8, light supply apparatus 610, optic modulating device 630 and image that Fig. 8 is display equipment 600 shown in Fig. 6 close
At the concrete structure schematic diagram of device 640.Specifically, in the embodiment shown in fig. 8, the light supply apparatus 610 includes the first light
Source 611 and second light source 612.The first light source 611 is for issuing first light, and the second light source 612 is for issuing
Second light, the first light source 611 include excitation light source and Wavelength converter, and the excitation light source issues exciting light,
The Wavelength converter has fluorescent material and for receiving the exciting light and issuing first light, the first light packet
Fluorescence is included, the second light source 612 includes laser light source, and second light includes laser.
The excitation light source can be laser light source, and the exciting light as described in blue laser light source is blue laser, the wave
Long conversion equipment is for receiving the exciting light and a part in the exciting light being converted to the fluorescence and will be described
For another part and the fluorescence in exciting light as first light, the fluorescent material may include red and green fluorescence
Material or yellow fluorescent material, the fluorescence include red light and green light, the Wavelength converter issue described the
In one light, the red fluorescence, green fluorescence and the blue excitation light can be issued with timesharing sequence.The second light source 612
Including red laser light source 615 and green laser light source 616, second light includes red laser and green laser, described red
Color laser and the green laser can also be issued with timesharing and sequence, and red laser light source 615 and green swash as described in control
Radiant 616 is alternately opened.
The first light source 611 further includes polarization converter 617, and the polarization converter 617 is located at the wavelength convert
Between device and first spatial light modulator 631, the polarization converter 617 receives what the Wavelength converter issued
Second light is simultaneously converted to the light of the first polarization state and the light of first polarization state is provided to institute by second light
State the first spatial light modulator 631, the red laser and the green laser are different from first polarization state
The light of two polarization states.First polarization state can be p-polarization state, and second polarization state can be s polarization state.The present embodiment
In, described image synthesizer 640 is polarization optics, and the polarization optics are by the first image light and described the
Two image lights are synthesized by way of polarizing light combination to show the width image.
Further, the second light source 612 further includes wavelength light combination element 618, the red laser light source 615 and green
Color laser light source 616 shines towards the wavelength light combination element 618, and the wavelength light combination element 618 is by the red laser
And the green laser is provided to the second space optical modulator 632 again by way of wavelength light combination after light combination.Specifically,
The red laser that the red laser light source 615 issues can be transmitted through the wavelength light combination element 618, the green laser light
The green laser that source 616 issues can be reflected via the wavelength light combination element 618.It is further appreciated that the red
The timing synchronization of laser light source 615, the green laser light source 616 and the second space optical modulator 632, to realize to institute
State the independent modulation of red laser and the green laser.
Further, in the present embodiment, the display equipment 600 further includes the guidance of the first induction element 619a and second
Element 619b, the first induction element 619a receive first light that the polarization converter 617 issues and by described the
One light is guided to first spatial light modulator 631, and the first image light that first spatial light modulator 631 issues also passes through
Described image synthesizer 640 is provided to by first induction element；The second induction element 619b receives the wave
The second light that long light combination element 618 issues simultaneously guides second light to the second space optical modulator 632, described second
The second image light that spatial light modulator 632 issues also is provided to described image synthesis via the second induction element 619b
Device 640.
In the present embodiment, first spatial light modulator 631 and the second space optical modulator 632 can simultaneously into
The modulation of row first light and the modulation of second light.Specifically, referring to Fig. 9, Fig. 9 is to show equipment 600 described in Fig. 6
Two spaces optical modulator 631,632 modulation timing figure.In the modulation time T1 of the width image, first spatial light
M kind color of light described in 631 received in sequence of modulator and the first image light for sequentially issuing the m kind color, if described first is empty
Between optical modulator 631 be respectively m1, m2 and m3 to the modulation time of m kind color of light, the second space optical modulator 632 is sequentially
It receives the n kind color of light and sequentially issues the second image light of the n kind color, if the second space optical modulator 632
The modulation time to n kind color of light is respectively n1, n2, in present embodiment, T1=m1+m2+m3=n1+n2, but can manage
Solution, in change embodiment, m1+m2+m3 can also be not equal to n1+n2, i.e., since two spaces optical modulator 631,632 can
To be independently modulated, the timing of the two can not have to fully synchronized.
Compared with prior art, the invention shows in equipment 600, due to increasing by second light, and also by the width
The raw image data of image is converted to m the first correcting controlling signal values and n for respectively corresponding first light and the second light
A second correcting controlling signal value, and then according to the m the first correcting controlling signal values and n the second correcting controlling signal values
The first image light and the second image light can be obtained by modulating first light and second light respectively, and wide colour gamut may be implemented
The display of image data, and can guarantee to show the accurate reproduction of image, the colour gamut of the display equipment 600 is wider, shows
Effect is preferable.
Further, when calculating described correcting controlling signal value r, g, b, rl, gl, described rl is taken by making2+gl2Most
Hour each data value of r, g, b, rl, gl, can make the use to the corresponding red laser of described rl, gl and green laser compared with
It is few, and then reduce cost of light source.
Referring to Fig. 10, Figure 10 is the flow diagram of the display methods of display equipment 600 shown in fig. 6.The display
Method includes the following steps S1, S2, S3 and S4.
Step S1, provides the first light and the second light, and first light is used to modulate the image of the first gamut range, and described the
Two light are used to cooperate the image other than the first gamut range described in the described first smooth common modulation, and first light includes m kind face
Coloured light, second light include the n kind color of light in m kind color of light, and m is more than or equal to n.The step S1 can be by the light source
Device executes, just no longer superfluous herein due to being described to the specific structure and effect of the light supply apparatus 610 above
It states.
Step S2 receives the raw image data of a width image to be displayed, the raw image data of the width image to be displayed
It is the image data based on the second gamut range and the original control signal value including each pixel m kind color, second colour gamut
Range covers first gamut range and has the part beyond first gamut range.The step S2 can be by described
Image data processing module 620 executes.
Step S3, by the original control signal of the m kind color of each pixel of the raw image data of the width image to be displayed
Value is mapped as the correcting controlling signal value of (m+n) kind color to obtain the image correcting data of the width image to be displayed, described
In image correcting data, the correcting controlling signal value of (m+n) kind color of each pixel includes m first of corresponding first light
N the second correcting controlling signal values of correcting controlling signal value and corresponding second light.The step S3 can be by the figure
As the execution of data processing module 620, since the specific structure to described image data processing module 620 and effect carry out above
It introduces, is not described in more detail here.
Step S4 receives the image correcting data, a first correction of m according to each pixel of the image correcting data
Control signal value modulates n that first light obtains the first image light and each pixel according to the image correcting data
Second correcting controlling signal value modulates second light and obtains the second image light, the first image light and second image light
It is also synthesized to show the width image.The step S4 can be held by the optic modulating device 630 and image synthesizer 640
Row, due to being described to the specific structure and effect of the optic modulating device 630 and image synthesizer 640 above,
It is not described in more detail here.
Further, in the display methods, if m is 3, n 2, the original control signal value of the m kind color of each pixel
For R, G, B, the m the first correcting controlling signal values are r, g, b, and the n the second correcting controlling signal values are rl, gl, according to
According to original control signal value R, G, B of the pixel tristimulus values for calculating the pixel obtained and the according to the pixel
One correcting controlling signal value r, g, b and the second correcting controlling signal value rl, gl calculate the tristimulus values phase of the pixel obtained
Deng.In the step S3, original control signal value R, G, B according to each pixel calculate first and second Corrective control letter
Number value be r, g, b, rl, gl when, take rl2+gl2Each data value of r, g, b, rl, gl when minimum.
Compared with prior art, the invention shows in method, due to increasing by second light, and also by the width image
Raw image data be converted to m the first correcting controlling signal values for respectively corresponding first light and the second light and n the
Two Corrective control signal values, and then distinguish according to the m the first correcting controlling signal values and n the second correcting controlling signal values
The first image light and the second image light can be obtained by modulating first light and second light, and the image of wide colour gamut may be implemented
The display of data, and can guarantee show image accurate reproduction, using the display methods display equipment colour gamut compared with
Width, display effect are preferable.
Further, when calculating described correcting controlling signal value r, g, b, rl, gl, described rl is taken by making2+gl2Most
Hour each data value of r, g, b, rl, gl, can make the use to the corresponding red laser of described rl, gl and green laser compared with
It is few, and then reduce cost of light source.
It, can be by the way that a small amount of red, green laser be added to reach using display equipment 600 of the present invention and display methods
The gamut range of REC 2020.Figure 11 is please referred to, Figure 11 is that the technology colour gamut of display equipment shown in Fig. 6 and color volume expansion show
It is intended to.It as shown in figure 11, can be by gamut extension to Rec.2020 by the way that the green laser and red laser of 5% brightness is added
Range, wherein periphery shadow region shown in Figure 11 be extension gamut range, therefore the display equipment 600 and use
The display effect of the display equipment of the display methods is preferable.
Mode the above is only the implementation of the present invention is not intended to limit the scope of the invention, all to utilize this
Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content, it is relevant to be applied directly or indirectly in other
Technical field is included within the scope of the present invention.
Claims (13)
1. a kind of display equipment, which is characterized in that the display equipment includes:
Light supply apparatus, for issuing the first light and the second light, first light is used to modulate the image of the first gamut range, described
Second light is used to cooperate the image other than the first gamut range described in the described first smooth common modulation, and first light includes m kind
Color of light, second light include the n kind color of light in m kind color of light, and m is more than or equal to n；
Image data processing module, for receiving the raw image data of a width image to be displayed, the original of the width image to be displayed
Beginning image data is the image data based on the second gamut range and the original control signal value including each pixel m kind color, institute
The second gamut range is stated to cover first gamut range and there is the part beyond first gamut range, described image number
It is also used to according to processing module by the original control signal of the m kind color of each pixel of the raw image data of the width image to be displayed
Value is mapped as the correcting controlling signal value of (m+n) kind color to obtain the image correcting data of the width image to be displayed, described
In image correcting data, the correcting controlling signal value of (m+n) kind color of each pixel includes m first of corresponding first light
N the second correcting controlling signal values of correcting controlling signal value and corresponding second light；And
Optic modulating device, for receive the image correcting data, according to the image correcting data each pixel m first
Correcting controlling signal value modulates first light and obtains the first image light and each pixel according to the image correcting data
N the second correcting controlling signal values modulate second light and obtain the second image light, the first image light and second figure
As light is also synthesized to show the width image.
2. display equipment as described in claim 1, it is characterised in that: set m as 3, n 2, the original of the m kind color of each pixel
Beginning control signal value is R, G, B, and the m the first correcting controlling signal values are r, g, b, the n the second correcting controlling signals
Value is rl, gl, and the tristimulus values and foundation of the pixel obtained are calculated according to original control signal value R, G, B of the pixel
First correcting controlling signal value r, g, b of the pixel and the second correcting controlling signal value rl, gl calculate the pixel obtained
Tristimulus values it is equal.
3. display equipment as claimed in claim 2, it is characterised in that: described image data processing module is according to each pixel
When first and second described correcting controlling signal value of original control signal value R, G, B calculating is r, g, b, rl, gl, rl is taken2+gl2Most
Each data value of r, g, b, rl, gl of hour.
4. display equipment as described in claim 1, it is characterised in that: the optic modulating device includes the first spatial light modulator
With second space optical modulator, first spatial light modulator is used for m of each pixel according to the image correcting data
First correcting controlling signal value modulates first light and obtains the first image light, the second space optical modulator be used for according to
Second light, which is modulated, according to n the second correcting controlling signal values of each pixel of the image correcting data obtains second figure
As light.
5. display equipment as claimed in claim 4, it is characterised in that: the light supply apparatus includes first light source and the second light
Source, the first light source is for issuing first light, and the second light source is for issuing second light, the first light source
Including excitation light source and Wavelength converter, the excitation light source issues exciting light, and the Wavelength converter has phosphor
Expect and be used to receive the exciting light and issue first light, first light includes fluorescence, and the second light source includes swashing
Radiant, second light includes laser.
6. display equipment as claimed in claim 5, it is characterised in that: the excitation light source is laser light source, the exciting light
For blue laser, the Wavelength converter is for receiving the exciting light and a part in the exciting light being converted to institute
State fluorescence and using in the exciting light another part and the fluorescence as first light, the fluorescence includes red
Light and green light；The second light source includes red laser light source and green laser light source, and second light includes red laser
And green laser.
7. display equipment as claimed in claim 6, it is characterised in that: the display equipment further includes image synthesizer, institute
Image synthesizer is stated to be used for the first image light and the second image photosynthesis to show the width image.
8. display equipment as claimed in claim 7, it is characterised in that: the first light source further includes polarization converter, described
For polarization converter between the Wavelength converter and first spatial light modulator, the polarization converter receives institute
It states second light of Wavelength converter sending and second light is converted into the light of the first polarization state and by described the
The light of one polarization state is provided to first spatial light modulator, and the red laser and the green laser are and described
The light of the second different polarization state of one polarization state, described image synthesizer are polarization optics, the polarization optics
The first image light is synthesized by way of polarizing light combination with second image light to show the width image.
9. display equipment as claimed in claim 8, it is characterised in that: the second light source further includes wavelength light combination element, institute
It states red laser light source and green laser light source to shine towards the wavelength light combination element, the wavelength light combination element will be described
Red laser and the green laser are provided to the second space optical modulator again by way of wavelength light combination after light combination.
10. as claimed in claim 9 display equipment, it is characterised in that: the display equipment further include the first induction element and
Second induction element, first induction element receive first light that the polarization converter issues and by first light
Guidance is to first spatial light modulator, and the first image light that first spatial light modulator issues is also via described first
Induction element is provided to described image synthesizer；Second induction element receive that the wavelength light combination element issues the
Second light is simultaneously guided the second figure issued to the second space optical modulator, the second space optical modulator by two light
As light is also provided to described image synthesizer via second induction element.
11. a kind of display methods, which is characterized in that the display methods includes the following steps:
The first light and the second light are provided, first light is used to modulate the image of the first gamut range, and second light is for matching
The image other than the first gamut range described in the described first smooth common modulation is closed, first light includes m kind color of light, and described
Two light include the n kind color of light in m kind color of light, and m is more than or equal to n；
The raw image data of a width image to be displayed is received, the raw image data of the width image to be displayed is based on the second color
The image data of domain range and original control signal value including each pixel m kind color, described in the second gamut range covering
First gamut range and have beyond first gamut range part；
The original control signal value of the m kind color of each pixel of the raw image data of the width image to be displayed is mapped as (m+
N) the correcting controlling signal value of color is planted to obtain the image correcting data of the width image to be displayed, the image correcting data
In, the correcting controlling signal value of (m+n) kind color of each pixel includes m the first correcting controlling signals of corresponding first light
N the second correcting controlling signal values of value and corresponding second light；And
Receive the image correcting data, a first correcting controlling signal values of m according to each pixel of the image correcting data
Modulate the n second correction control that first light obtains the first image light and each pixel according to the image correcting data
Signal value processed modulates second light and obtains the second image light, the first image light and second image light be also synthesized with
Show the width image.
12. display methods as claimed in claim 11, it is characterised in that: set m as 3, n 2, the m kind color of each pixel
Original control signal value is R, G, B, and the m the first correcting controlling signal values are r, g, b, the n the second Corrective control letters
Number value be rl, gl, according to the pixel original control signal value R, G, B calculate obtain the pixel tristimulus values with according to
The picture obtained is calculated according to first correcting controlling signal value r, g, b of the pixel and the second correcting controlling signal value rl, gl
The tristimulus values of element is equal.
13. display methods as claimed in claim 11, it is characterised in that: according to each pixel original control signal value R, G,
When first and second described correcting controlling signal value of B calculating is r, g, b, rl, gl, rl is taken2+gl2R, g, b, rl, gl when minimum
Each data value.
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| CN201810219582.0A CN110278421B (en) | 2018-03-16 | 2018-03-16 | Display apparatus and display method |
| PCT/CN2018/113879 WO2019174272A1 (en) | 2018-03-16 | 2018-11-05 | Display device and display method |
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| CN111045284A (en) * | 2019-12-11 | 2020-04-21 | 江西省科学院应用物理研究所 | Super large screen laser projector of high-efficient laser light source that utilizes |
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| CN108279548B (en) * | 2017-01-06 | 2021-02-02 | 深圳光峰科技股份有限公司 | Projection system |
| CN108628069B (en) * | 2017-03-22 | 2020-09-08 | 深圳光峰科技股份有限公司 | Projection system |
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| US20030234911A1 (en) * | 2002-06-21 | 2003-12-25 | Eastman Kodak Company | Imaging apparatus for increased color gamut using dual spatial light modulators |
| CN104980721A (en) * | 2014-04-02 | 2015-10-14 | 深圳市绎立锐光科技开发有限公司 | Light source system and projection system |
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| WO2019174272A1 (en) | 2019-09-19 |
| CN110278421B (en) | 2022-04-15 |
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