CN107888891A - Image projection display methods and light engine - Google Patents
Image projection display methods and light engine Download PDFInfo
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- CN107888891A CN107888891A CN201610874762.3A CN201610874762A CN107888891A CN 107888891 A CN107888891 A CN 107888891A CN 201610874762 A CN201610874762 A CN 201610874762A CN 107888891 A CN107888891 A CN 107888891A
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- subregion
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- brightness degree
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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]
- H04N9/3197—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using light modulating optical valves
-
- 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
- H04N9/3152—Modulator illumination systems for shaping the light beam
-
- 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
- H04N9/3155—Modulator illumination systems for controlling the light source
Abstract
The disclosure discloses a kind of image projection display methods and light engine.Methods described includes：Obtain the view data of display image to be projected, subregion is carried out to the display image to be projected according to the brightness data, the subregion has different brightness degrees, according to brightness degree corresponding to each subregion, adjust the luminous flux of regional corresponding with each subregion difference in the display image to be projected in luminous flux control element, light beam after adjustment is projected to DMD light valves surface by the luminous flux control element, the DMD light valves are according to the image display drive signals of the display image to be projected, modulate the light beam, and project and carry out imaging into projection lens and show.Above-mentioned image projection display methods can automatically control projection-display image Luminance Distribution according to the brightness degree of each subregion of display image to be projected, so as to adjust the contrast of projection-display image, still further provides a kind of light engine.
Description
Technical field
This disclosure relates to field of projection display, more particularly to a kind of image projection display methods and light engine.
Background technology
Light engine is as a kind of important computer graphic image output equipment, in teaching, demonstration, amusement, work etc.
Aspect increasingly receives an acclaim.DLP (Digital Light Processing, digital optical processing technique) light engine is a kind of
Using the light engine of special light sources modulation mode, due to using digital reflection mode, DLP light engines can not only make projection
Display image is more careful, while can effectively reduce the volume and weight of light engine, thus is widely used in a variety of applications.
In DLP light engines, by DMD (Digital Micromirror Device, DMD) light valve conduct
Main element is to realize optical digital computing process.The white light that light source is sent, by collector lens post-concentration to by it is red, green,
On one colour wheel disk of the alternate composition of blue three-color, the monochromatic timing output of red, green, blue is produced, is become by lens
It is irradiated to after into directional light on DMD light valves.And DMD light valves-controlled by image display drive signals, make on thousands of above it
Ten thousand micro-reflectors are back and forth switched between "ON" or off position respectively.Micro-reflector in "ON" position will make light
Line reflection is entered in camera lens, correspondingly produces a bright spot on the projection screen；And those are in micro- reflection of off-position
Mirror will be such that light reflexes to outside camera lens, be predominantly absorbed as veiling glare, correspondingly produce a dim spot on the projection screen.This
Sample, the angle overturn by each micro-reflector and duration determine the light quantity into camera lens, by the institute on whole dmd chip
After having micro-reflector reflection, by camera lens, a complete projection-display image will be finally formed on the projection screen.
Fig. 1 is the light deflection and projection situation of two minor reflective lens units according to an exemplary embodiment
Schematic diagram.It is micro- anti-under the control of view data after the light that light source 101 is sent is irradiated on dmd chip after treatment
The upset that mirror 108,109 is responded is penetrated, is all introduced into by the light that micro-reflector 109 reflects in camera lens 104, and by micro- reflection
The light projection that mirror 108 reflects is sponged outside camera lens as veiling glare by light absorption units 107.
In current DLP light engines, due to light in reflection process there is diffusing reflection, make by dmd chip
The light of micro-reflector reflection can not be projected all in camera lens, reduce the brightness of light in projection-display image, from
And when reducing most bright brightness and it is most dark when brightness ratio, even if the contrast of projection-display image is poor.
The content of the invention
Asked to solve the poor technology of the projection-display image contrast of DLP light engines present in correlation technique
Topic, present disclose provides a kind of image projection display methods and light engine.
A kind of image projection display methods, including：
Obtain the view data of display image to be projected；
Subregion is carried out to the display image to be projected according to described image data, each subregion has corresponding brightness etc.
Level；
According to brightness degree corresponding to each subregion, adjust in luminous flux control element and scheme with the display to be projected
The luminous flux of regional corresponding to each subregion difference as in, wherein, the subregion of different brightness degrees, the light corresponding to it
The luminous flux adjustment amplitude in region is different in flux control element；
Light beam after adjustment is projected to DMD light valves surface by the luminous flux control element, and the DMD light valves are according to
The image display drive signals of display image to be projected, modulate the light beam, and project and carry out imaging into projection lens and show.
A kind of light engine, according to beam Propagation direction, including：
Illumination path, the light beam sent for receiving and homogenizing projection light source；
Luminous flux control element, it is used for the light beam for receiving the illumination path outgoing, and according to display image to be projected
The subregion of middle determination, subregion carry out luminous flux adjustment to the light beam, wherein, the subregion of different brightness degrees, it is right
The luminous flux adjustment amplitude in region is different in the luminous flux control element answered；
DMD light valves, it is used to receive the light beam after the luminous flux control element adjustment, schemed according to the display to be projected
The image display drive signals of picture, modulation are projected to the light beam of its own face, and put into projection lens and carry out imaging and show；
The light engine, in addition to control chip, the control chip are used for the image for obtaining display image to be projected
Data, subregion is carried out to the display image to be projected according to described image data, determined in the display image to be projected
Subregion is corresponding with the subregion of the luminous flux control element.
The technical scheme provided by this disclosed embodiment can include the following benefits：
The view data of display image to be projected is obtained, treating projection-display image according to view data carries out subregion, point
Area has different brightness degrees, according to brightness degree corresponding to each subregion, adjust in luminous flux control element with it is to be projected
The luminous flux of regional corresponding to each subregion difference in display image, wherein, the subregion of different brightness degrees, it is right
The luminous flux adjustment amount in region is different in the luminous flux control element answered, and the light beam after adjustment is projected to by luminous flux control element
DMD light valves surface, DMD light valves modulate light beam, and project into projection according to the image display drive signals of display image to be projected
Camera lens carries out imaging and shown.By adding luminous flux control element in light engine, according to each in display image to be projected
The different brightness degree of subregion, make the luminous flux of the corresponding regional respectively of each with image subregion in luminous flux control element
Adjustment amplitude it is different, and DMD light valves still according to display image to be projected image display drive signals to passing through luminous flux control
The light beam of system is adjusted, so that the Luminance Distribution of the projection-display image of generation changes compared to display image to be projected
Become, adjust the contrast of projection-display image.
It should be appreciated that the general description and following detailed description of the above are only exemplary, this can not be limited
It is open.
Brief description of the drawings
Accompanying drawing herein is merged in specification and forms the part of this specification, shows the implementation for meeting the present invention
Example, and in specification together for explaining principle of the invention.
Fig. 1 is the light deflection and projection situation of two minor reflective lens units according to an exemplary embodiment
Schematic diagram；
Fig. 2 is the schematic diagram of the implementation environment according to involved by the disclosure；
Fig. 3 is a kind of flow chart of image projection display methods according to an exemplary embodiment；
Fig. 4 is a kind of schematic diagram of DLP light engines progress signal transacting according to an exemplary embodiment；
Fig. 5 be Fig. 3 correspond to embodiment according to view data treat projection-display image carry out subregion, subregion have difference
Brightness degree step flow chart；
Fig. 6 is the positional information according to each pixel according to an exemplary embodiment by display image decile to be projected
For 16 subregions when schematic diagram；
Fig. 7 be Fig. 6 correspond to embodiment the monochrome information and picture element position information according to each pixel determine it is to be projected aobvious
Correspond to the flow chart of the partitioning step of brightness degree in diagram picture；
Fig. 8 is the brightness degree according to corresponding to each subregion that Fig. 3 corresponds to embodiment, adjust luminous flux control element in
The flow chart of the luminous flux step of regional corresponding to each subregion difference in display image to be projected；
Fig. 9 is the brightness degree according to corresponding to each subregion that Fig. 3 corresponds to embodiment in another embodiment, adjusts luminous flux
The flow chart of the luminous flux step of regional corresponding with each subregion difference in display image to be projected in control element；
Figure 10 is a kind of block diagram of image projection device according to an exemplary embodiment；
Figure 11 is the block diagram of picture portion module that Figure 10 correspondingly implements to exemplify；
Figure 12 is the block diagram that Figure 10 correspondingly implements the picture portion module exemplified in another embodiment；
Figure 13 is the block diagram of luminous flux control module that Figure 10 correspondingly implements to exemplify；
Figure 14 is the block diagram that Figure 10 correspondingly implements the luminous flux control module exemplified in another embodiment；
Figure 15 is a kind of structured flowchart of light engine according to an exemplary embodiment.
Embodiment
Here explanation will be performed to exemplary embodiment in detail, its example is illustrated in the accompanying drawings.Following description is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent and the consistent all embodiments of the present invention.On the contrary, they be only with it is such as appended
The example of the consistent apparatus and method of some aspects being described in detail in claims, of the invention.
Fig. 2 is the schematic diagram of the implementation environment according to involved by the disclosure.As shown in Fig. 2 the implementation environment includes：Optics
Engine 100 and video signal output terminal 200.Video signal output terminal 200 carries out data communication link with light engine 100
Connect, video signal output terminal 200 is right after light engine 100 receives vision signal to the transmission video signal of light engine 100
Vision signal is handled, and generates view data, and then the Projection Display related to vision signal is projected out according to view data
Image.
Embodiment one
Fig. 3 is a kind of flow chart of image projection display methods according to an exemplary embodiment.As shown in figure 3,
The image projection display methods may comprise steps of.
In step s 110, the view data of display image to be projected is obtained.
During the use of light engine, display data is converted to video by the video signal output terminal such as computer to be believed
Number, by the linkup transmit of light engine and video signal output terminal to light engine, it is defeated that light engine receives vision signal
After going out the vision signal of terminal output, the view data that processing generates display image to be projected is carried out to vision signal.
Fig. 4 is a kind of schematic diagram of DLP light engines progress signal transacting according to an exemplary embodiment.Light source
101 light sent, light processing is carried out by optical system 102, is incident upon in DMD light valves 103, and vision signal is by multimedia
The view data of display image to be projected is generated after data processing module processing, view data includes display image to be projected
Image display drive signals, under the control of image display drive signals, 106 pairs of DMD light valves 103 are driven to carry out by light modulation
Control.So that DMD light valves 103 are shown to carrying out imaging by camera lens 104 after light processing.
In the step s 120, projection-display image is treated according to view data and carries out subregion, subregion has different brightness
Grade.
The monochrome information and the information such as positional information and image display drive signals of each pixel are included in view data.
The specific implementation that projection-display image carries out subregion is treated, can be according to the positional information of each pixel in view data
Subregion is carried out, projection-display image can also be treated according to the monochrome information and positional information of each pixel and carries out subregion, can also profit
Subregion is carried out with the other information in view data, herein without enumerating.
By display image to be projected carry out subregion after, according to the brightness of each subregion, each subregion respectively correspond to one it is bright
Grade is spent, and between each subregion, its brightness degree can be with identical, can also be different.
In step s 130, the brightness degree according to corresponding to each subregion, adjust luminous flux control element in it is to be projected
The luminous flux of regional corresponding to each subregion difference in display image, wherein, the subregion of different brightness degrees, it is right
The luminous flux adjustment amplitude in region is different in the luminous flux control element answered.
Luminous flux control element is installed in the light path of light engine light, luminous flux control element is that a kind of optics is opened
Close, to control the luminous flux of light beam.Light beam is propagated through luminous flux control element, so as to pass through luminous flux control element
Control the brightness of light beam in light engine.Light beam is propagated forward with certain area coverage straight line in light engine, due to
Straightline propagation of the light of light beam in light engine, in the regional and projection-display image in luminous flux control element
Various pieces are one-to-one.Thus change the luminous flux to the different zones in luminous flux control element, Projection Display figure
The brightness of corresponding part will change as in.
According to brightness degree corresponding to each subregion of display image to be projected in view data, in luminous flux control element
Region corresponding to each subregion is determined, and then the luminous flux of corresponding regional in luminous flux control element is controlled,
Make the luminous flux of regional in luminous flux control element according to the difference that subregion brightness degree is corresponded in display image to be projected
It is and different.
In step S140, the light beam after adjustment is projected to DMD light valves surface, DMD light valve roots by luminous flux control element
According to the image display drive signals of display image to be projected, light beam is modulated, and is projected and is carried out imaging into projection lens and show.
DMD light valves be it is a kind of be electronically entered, the MEMS of optics output, by micro- transmitting mirror of many individual independent controls
Composition.The view data of display image to be projected includes image display drive signals, and DMD light valves are by image display drive signals
Control, the micro-reflector above it is back and forth switched between "ON" or off position respectively.In "ON" position
Micro-reflector will be such that light beam is reflected into camera lens, correspondingly produce a bright spot on the projection screen；And those are in
The micro-reflector of off-position will be such that light beam reflexes to outside camera lens, be predominantly absorbed as veiling glare, correspondingly in projection screen
One dim spot of upper generation.So, the angle that is overturn by each micro-reflector and duration determine the light quantity into camera lens, pass through
After all micro-reflectors reflection on whole DMD light valves, carry out imaging by projection lens and show, form one on the projection screen
Individual complete projection-display image.
DMD light valves are carrying out light processing according to the display drive signals of display image to be projected to light, generate projection
Projection-display image it is consistent with display image to be projected.And by the luminous flux of regional in luminous flux control element to throwing
The brightness of corresponding different piece is controlled in shadow display image.
When contrast is projection-display image full white luminance with brightness ratio during completely black brightness, thus by luminous flux
Control element regional carries out the control of luminous flux, the reduction amplitude of the corresponding part luma of projection-display image is differed
Cause, so as to adjust the contrast of projection-display image.
The partition shapes of luminous flux control element and DMD light valves are identical with the partition shapes of display image to be projected, but
It is in certain proportionate relationship in size.Due to the straightline propagation of light, each position of luminous flux control element passes through
The propagation of light corresponds with the position on DMD light valves, the position of each position and projection-display image on DMD light valves
It is and one-to-one.After treating projection-display image progress subregion, the regional according to subregion to luminous flux control element
Accordingly controlled, and then projected on DMD light valves, thus the subregion of the partition shapes of luminous flux control element and DMD light valves
Shape is identical with the partition shapes of display image to be projected.
Using method as described above, by setting up luminous flux control element in DLP light engines, according to view data
The brightness degree of each subregion in image is obtained, the luminous flux of corresponding regional in luminous flux control element is controlled, makes
The adjustment amplitude of the projection-display image various pieces brightness generated under the control of image display drive signals is different, and DMD light
Valve is adjusted still according to the image display drive signals of the display image to be projected to the light beam controlled by luminous flux, from
And the Luminance Distribution of the projection-display image of generation is changed compared to display image to be projected, adjust the contrast of image.
Embodiment two
Fig. 5 is the description of the details to step S120 according to an exemplary embodiment.In step S120, the step
S120 may comprise steps of.
In step S121, the monochrome information and picture element position information of each pixel in view data are extracted.
Pixel is the elementary cell of image, and image is made up of pixel.The brightness comprising each pixel is believed in view data
Breath and the information such as positional information and image display drive signals, the monochrome information and picture of each pixel are extracted from view data
Plain positional information.
In step S122, determined according to the monochrome information of each pixel and picture element position information in display image to be projected
Corresponding to the subregion of brightness degree.
Determined to correspond to brightness etc. in display image to be projected according to the monochrome information of each pixel and picture element position information
The mode of the subregion of level has a variety of.
According to the monochrome information of each pixel, brightness degree corresponding to each pixel is determined, and then according to each pixel
Positional information, by position is adjacent and brightness degree identical subregion is defined as the subregion of a brightness degree.Thus each subregion
Area can be identical or differ.
Display image to be projected can also be divided into by multiple subregions according to the positional information of each pixel, and then according to each point
The monochrome information of all pixels calculates the brightness of each subregion in area, so that it is determined that the brightness degree of each subregion.
Fig. 6 is the positional information according to each pixel according to an exemplary embodiment by display image decile to be projected
For 16 subregions when schematic diagram.In Fig. 6, according to the relative position of each pixel in display image to be projected, by display to be projected
Image is divided into 16 subregions by size, then obtains the brightness of this 16 subregions, determines the brightness degree of each subregion, enters
And the control of luminous flux is carried out to region corresponding in luminous flux control element according to the brightness degree of each subregion, make generation
The brightness of projection-display image various pieces be effectively controlled.
The partitioned mode for corresponding to brightness degree in display image to be projected can also be determined according to other modes, herein
Do not limit.
Using method as described above, by obtaining the monochrome information and pixel of each pixel in display image to be projected
Positional information, the subregion for corresponding to brightness degree in display image to be projected is determined, luminous flux control is controlled according to brightness degree
The luminous flux of corresponding regional in element, change the Luminance Distribution of projection-display image, adjust the contrast of image.
Embodiment three
Fig. 7 is the description of the details to step S122 according to an exemplary embodiment.In step S122, the step
S122 may comprise steps of.
In step S1221, brightness present in display image to be projected etc. is determined according to the monochrome information of each pixel
Level.
According to the monochrome information of each pixel, brightness value is divided into multiple brightness magnitude ranges, each brightness magnitude range
A corresponding brightness degree.
Determining the mode of brightness degree present in display image to be projected has a variety of, can be according to bright in light engine
Angle value is preset with multiple brightness degrees, and then according to the monochrome information of each pixel in display image to be projected, it is determined that this waits to throw
Brightness degree present in shadow display image；It can also be and the bright of each pixel in projection-display image is treated according to default standard
Angle value carries out the division of brightness degree, and then determines brightness degree present in the display image to be projected；It can also be and pass through
Other modes determine brightness degree present in display image to be projected, do not limit herein,
For example, it is assumed that brightness size is up to 100, in light engine by 0 to 100 brightness be divided into A [0,20), B [20,
40), C [40,60), D [60,80), 5 brightness degrees of E [80,100].In display image to be projected, the brightness value of all pixels
Between 10 to 70, it is thus determined that brightness degree present in display image to be projected be brightness degree A [0,20), B [20,
40), C [40,60), D [60,80].
In another example in display image to be projected, the brightness value of all pixels, will according to default standard between 10 to 70
Brightness value be divided into A [10,30), B [30,50), 3 brightness degrees of C [50,70], it is determined that exist in display image to be projected
Brightness degree for brightness degree A [10,30), B [30,50), C [50,70].
In step S1222, determine that each brightness degree exists according to the monochrome information of each pixel and picture element position information
Corresponding subregion in display image to be projected.
According to the monochrome information of each pixel, brightness degree corresponding to each pixel is searched.According to the position of each pixel
Information, the adjacent pixel of corresponding same brightness degree and position is defined as a subregion, brightness is corresponded into same brightness etc.
Multiple subregions of level are defined as the brightness degree corresponding subregion in display image to be projected.
For example, in display image to be projected, existing brightness degree is respectively brightness degree A, B, C, brightness degree A, B, C
Brightness magnitude range be respectively A [0,20), B [20,40), C [40,70).As three adjacent pixel X1, X2, X3 successively
When brightness is respectively 30,35,50, due to pixel X1, X2 brightness B [20,40) in, and pixel X3 brightness C [40,70)
In, thus pixel X1, X2 is defined as to a brightness degree B subregion.
Using method as described above, by bright existing for the monochrome information determination of each pixel in display image to be projected
Grade is spent, treating projection-display image according to the brightness degree of each pixel and positional information carries out subregion, subregion and each pixel
Brightness and position more match, more targeted when making to be adjusted the luminous flux of luminous flux control element according to subregion, keep away
Exempt from the Luminance Distribution distortion of picture.
Example IV
Fig. 8 is the description of the details to step S130 according to an exemplary embodiment.Display image to be projected
Brightness degree corresponding to subregion is high brightness level and low brightness levels, and in step S130, step S130 can include following
Step.
In step S131, according to brightness degree corresponding to each subregion, subregion corresponding to low brightness levels is determined.
Two brightness degrees in display image to be projected be present, the two brightness degrees are respectively high brightness level and low bright
Spend grade.According to brightness degree corresponding to each subregion difference, and then determine that low brightness levels are right in display image to be projected
The subregion answered.
For example, share 4 subregions F1, F2, F3, F4 in display image to be projected, brightness degree be respectively brightness degree A and
Brightness degree B, brightness degree A are high brightness level, and brightness degree B is low brightness levels.Brightness corresponding to subregion F1, F2, F3
Grade is brightness degree A, and brightness degree corresponding to subregion F4 is brightness degree B, it is possible thereby to determine that low brightness levels are corresponding
Subregion be subregion F4.
In step S132, determine subregion corresponding to low brightness levels in the corresponding region of luminous flux control element, reduction
The luminous flux of corresponding region.
Each position in luminous flux control element be it is one-to-one with the position in display image to be projected, thus
For each subregion in display image to be projected, there is specific region corresponding in luminous flux control element.According to
Subregion corresponding to low brightness levels in display image to be projected, determine area corresponding with these subregions in luminous flux control element
Domain, and then by being controlled to luminous flux control element, reduce the luminous flux in region corresponding with low brightness levels subregion.
Using method as described above, according to brightness degree corresponding to each subregion in display image to be projected, light is determined
Region corresponding with low brightness levels subregion in flux control element, and then the luminous flux in these regions is reduced, make to be projected aobvious
The luminance-reduction of script darker area in diagram picture, so as to improve the contrast of projection-display image.
Embodiment five
Fig. 9 is the description of the details to step S130 according to an exemplary embodiment.Display image to be projected
Brightness degree corresponding to subregion is multiple brightness degrees, and in step S130, step S130 may comprise steps of.
In step S134, according to brightness degree corresponding to each subregion, low area's brightness degree and low area's brightness etc. are determined
Subregion corresponding to level；
Brightness degree corresponding to the subregion of display image to be projected is multiple brightness degrees, suitable according to the height of brightness degree
Sequence, according to the standard pre-set, determine the brightness degree in low area's brightness degree.
The standard pre-set can be a brightness degree, and less than the brightness degree of the brightness degree, to be defined as low area bright
Spend grade；The standard pre-set can also exclude maximum brightness grade, will compare highest according to the sequence of each brightness degree
The low brightness degree of brightness degree confirms as low area's brightness degree；It can also be and determine low area's brightness etc. by other standards
Level.
For example, brightness degree corresponding to the subregion of display image to be projected has 4, according to the sequence point of brightness degree
Not Wei brightness degree A, brightness degree B, brightness degree C, brightness degree D, it is low area to determine the low brightness degrees of specific luminance grade B
Brightness degree, therefore confirm that brightness degree C, D are low area's brightness degree.
In another example brightness degree corresponding to the subregion of display image to be projected has 4, according to the sequence of brightness degree
Respectively brightness degree A, brightness degree B, brightness degree C, brightness degree D, maximum brightness grade A is excluded, confirm brightness degree
B, C, D are low area's brightness degree.
Because each brightness degree has corresponding subregion in display image to be projected, thus it is bright according to the low area of determination
Grade is spent, chooses subregion corresponding to each brightness degree in low area's brightness degree.
In step S135, determine that low area's brightness degree corresponds to subregion in the corresponding region of luminous flux control element, according to
Sequence between low area's brightness degree, determines the range of decrease of luminous flux in corresponding region, the range of decrease according to low area's brightness degree it
Between sequence be incremented by；
According to subregion corresponding to each brightness degree in low area's brightness degree, determine in luminous flux control element with these subregions
Corresponding region.Because each brightness degree in low area's brightness degree corresponds to different brightness magnitude ranges, brightness etc. is still suffered from
The sequence of level, according to sequence, determines the luminous flux of corresponding region in luminous flux control element, low with brightness degree right
Answer region light flux ratio corresponding to subregion and the range of decrease of region luminous flux corresponding to the high corresponding subregion of brightness degree big.
For example, brightness degree corresponding to the subregion of display image to be projected has 4, according to the sequence point of brightness degree
Not Wei brightness degree A, brightness degree B, brightness degree C, brightness degree D, it is determined that low area's brightness degree be brightness degree C, D,
In display image to be projected, region corresponding to brightness degree C is C1, and region corresponding to brightness degree D is D1, and luminous flux controls
In element, region corresponding with C1 is c1, and region corresponding with D1 is d1.Brightness due to brightness degree D specific luminance grades C etc.
Level it is low, thus in luminous flux control element region d1 light flux ratio region c1 luminous flux the range of decrease it is big.
In step S136, the luminous flux in corresponding region is reduced according to the range of decrease.
Using method as described above, according to brightness degree corresponding to each subregion in display image to be projected, determine bright
It is low area's brightness degree to spend part or all of junior brightness degree, and then according to each brightness etc. in low area's brightness degree
The sequence of level, determine region luminous flux corresponding to subregion difference corresponding with each brightness degree subregion in luminous flux control element
The range of decrease, the luminous flux range of decrease of these corresponding regions is incremented by with the sequence of brightness degree, make display image Central Plains to be projected
The brightness in the image of projection generation of this dark subregion is lower, so as to improve the contrast of projection-display image.
Following is embodiment of the present disclosure, can be used for performing this above-mentioned image projection display methods embodiment.For
The details not disclosed in embodiment of the present disclosure, it refer to the display methods embodiment of disclosure image projection.
Figure 10 is a kind of block diagram of image projection device according to an exemplary embodiment, as shown in Figure 10, the figure
As projection arrangement includes but is not limited to：Luminance acquisition module 110, picture portion module 120, luminous flux control module 130 and
It is imaged display module 140.
Image data acquisition module 110, for obtaining the view data of display image to be projected；
Picture portion module 120, subregion is carried out for treating projection-display image according to view data, each subregion has
Corresponding brightness degree；
Luminous flux control module 130, for the brightness degree according to corresponding to each subregion, adjust in luminous flux control element
The luminous flux of regional corresponding with each subregion difference in display image to be projected, wherein, point of different brightness degrees
Area, the luminous flux adjustment amplitude in region is different in the luminous flux control element corresponding to it；
Display module 140 is imaged, the light beam after adjustment is projected to DMD light valves surface, DMD for luminous flux control element
Light valve modulates light beam, and project into projection lens be imaged and show according to the image display drive signals of display image to be projected
Show.
The function of modules and the implementation process of effect specifically refer to above-mentioned image projection display methods in said apparatus
The implementation process of middle corresponding step, will not be repeated here.
Optionally, as shown in figure 11, picture portion module 120 includes but is not limited to：Information extraction unit 121 and subregion are true
Order member 122.
Information extraction unit 121, for extracting the monochrome information and picture element position information of each pixel in view data；
Subregion determining unit 122, determined for the monochrome information according to each pixel and picture element position information to be projected aobvious
Correspond to the subregion of brightness degree in diagram picture.
Optionally, as shown in figure 12, picture portion module 120 includes but is not limited to：Brightness degree determining unit 124 and wait
Level subregion determining unit 125.
Brightness degree determining unit 124, for determining to deposit in display image to be projected according to the monochrome information of each pixel
Brightness degree；
Grade subregion determining unit 125, determined for the monochrome information according to each pixel and picture element position information each
Brightness degree corresponding subregion in display image to be projected.
Optionally, as shown in figure 13, luminous flux control module 130 includes but is not limited to：Low brightness levels subregion determines single
Member 131 and luminous flux reduce unit 132.
Low brightness levels subregion determining unit 131, for the brightness degree according to corresponding to each subregion, determine low-light level etc.
Subregion corresponding to level；
Luminous flux determines to reduce unit 132, for determining subregion corresponding to low brightness levels in luminous flux control element
Corresponding region, reduce the luminous flux of corresponding region.
Optionally, as shown in figure 14, luminous flux control module 130 includes but is not limited to：Low area's grade subregion determining unit
134th, luminous flux range of decrease determining unit 135 and luminous flux reduce unit 136.
Low area's grade subregion determining unit 134, for the brightness degree according to corresponding to each subregion, determine low area's brightness etc.
Subregion corresponding to Ji Hedi areas brightness degree；
Luminous flux range of decrease determining unit 135, for determining that low area's brightness degree corresponds to subregion in luminous flux control element
Corresponding region, according to the sequence between low area's brightness degree, the range of decrease of luminous flux in corresponding region is determined, the range of decrease is according to low
Sequence between area's brightness degree is incremented by；
Luminous flux reduces unit 136, for reducing the luminous flux in corresponding region according to the range of decrease.
Figure 15 is a kind of structured flowchart of light engine according to an exemplary embodiment, as shown in figure 15, according to
Beam Propagation direction, the light engine include but is not limited to：
Illumination path 10, the light beam sent for receiving and homogenizing projection light source；
Luminous flux control element 20, it is used for the light beam for receiving illumination path outgoing, and according in display image to be projected
The subregion of determination, subregion carry out luminous flux adjustment to light beam, wherein, the subregion of different brightness degrees, the light corresponding to it
The luminous flux adjustment amplitude in region is different in flux control element 20；
DMD light valves 30, it is used to receive the light beam after the adjustment of luminous flux control element, according to the figure of display image to be projected
As display drive signals, modulation is projected to the light beam of its own face, and puts into projection lens and carry out imaging and show；
Light engine, in addition to control chip 40, control chip 40 are used for the view data for obtaining display image to be projected,
Projection-display image is treated according to view data and carries out subregion, the subregion determined in display image to be projected and luminous flux control member
The subregion of part 20 is corresponding.
Light engine receives the view data that display data post processing generates display image to be projected, according to display to be projected
The image display drive signals control DMD light valves 30 of image are modulated to light.
Control chip 40 treats projection-display image according to view data and carries out subregion, according to the brightness degree pair of each subregion
Luminous flux in luminous flux control element 20 with each subregion of display image to be projected corresponding regional respectively is controlled,
And then make the light beam of illumination path 10 brightness of regional is controlled after luminous flux control element 20.According to
The brightness degree of each subregion in corresponding display image to be projected, is obtained by the brightness of the different zones of luminous flux control element 20
To different degrees of reduction, DMD light valves 30 are adjusted to the light after luminous flux control element 20 carries out luminous flux control
System, projection-display image is generated after projecting camera lens.
According to each portion of brightness degree control projection-display image of each subregion of display image to be projected in view data
The brightness divided, the brightness of projection-display image various pieces is set to be carried out not according to the difference of original brightness of itself each subregion
With the reduction of degree, so as to adjust the features such as the contrast of projection-display image.
Optionally, luminous flux control element 20 for can logical partition light penetrating device, light penetrating device can be LCD
(Liquid Crystal Display, thin film transistor LCD device) liquid crystal luminous flux control element, or light
Grid luminous flux control element, can also be other translucent panels.Luminous flux control element 20 passes through internal multiple small light
Control switch allows light to realize the control of luminous flux by or to light barrier.
Further, luminous flux control element 20 is used for：
According to brightness degree corresponding to each subregion, subregion corresponding to low brightness levels is determined；
Determine that low brightness levels correspond to subregion and led in the corresponding region of luminous flux control element, the light for reducing corresponding region
Amount.
Further, light is used for by control element 20：
According to brightness degree corresponding to each subregion, subregion corresponding to low area's brightness degree and low area's brightness degree is determined；
Determine that low area's brightness degree corresponds to subregion in the corresponding region of luminous flux control element, according to low area's brightness degree it
Between sequence, determine the range of decrease of luminous flux in corresponding region, the range of decrease is passed according to the sequence between low area's brightness degree
Increase；
The luminous flux in corresponding region is reduced according to the range of decrease.
It should be appreciated that the invention is not limited in the precision architecture for being described above and being shown in the drawings, sheet
Art personnel can perform various modifications and changes without departing from the scope.The scope of the present invention only will by appended right
Ask to limit.
Claims (9)
1. a kind of image projection display methods, including：
Obtain the view data of display image to be projected；
Subregion is carried out to the display image to be projected according to described image data, each subregion has corresponding brightness degree；
According to brightness degree corresponding to each subregion, adjust in luminous flux control element with the display image to be projected
The luminous flux of regional corresponding to each subregion difference, wherein, the subregion of different brightness degrees, the luminous flux corresponding to it
The luminous flux adjustment amplitude in region is different in control element；
Light beam after adjustment is projected to DMD light valves surface by the luminous flux control element, and the DMD light valves are waited to throw according to
The image display drive signals of shadow display image, modulate the light beam, and project and carry out imaging into projection lens and show.
2. according to the method for claim 1, it is characterised in that it is described according to described image data to the display to be projected
Image carries out subregion, and each subregion has corresponding brightness degree, including：
Extract the monochrome information and picture element position information of each pixel in described image data；
Determined according to the monochrome information of each pixel and picture element position information in the display image to be projected corresponding to bright
Spend the subregion of grade.
3. according to the method for claim 2, it is characterised in that the monochrome information and pixel according to each pixel
Positional information determines the subregion for corresponding to brightness degree in the display image to be projected, including：
Brightness degree present in the display image to be projected is determined according to the monochrome information of each pixel；
Determine each brightness degree in the display to be projected according to the monochrome information of each pixel and picture element position information
Corresponding subregion in image.
4. according to the method for claim 1, it is characterised in that brightness degree corresponding to the subregion be high brightness level and
Low brightness levels, the brightness degree according to corresponding to each subregion, adjust and wait to throw with described in luminous flux control element
The luminous flux of regional corresponding to each subregion difference in shadow display image, including：
According to brightness degree corresponding to each subregion, subregion corresponding to low brightness levels is determined；
Determine subregion corresponding to the low brightness levels in the corresponding region of the luminous flux control element, the reduction corresponding area
The luminous flux in domain.
5. according to the method for claim 1, it is characterised in that brightness degree corresponding to the subregion is multiple brightness etc.
Level, the brightness degree according to corresponding to each subregion, adjust in luminous flux control element and scheme with the display to be projected
The luminous flux of regional corresponding to each subregion difference as in, including：
According to brightness degree corresponding to each subregion, determine to divide corresponding to low area's brightness degree and low area's brightness degree
Area；
Determine that low area's brightness degree corresponds to subregion in the corresponding region of the luminous flux control element, it is bright according to the low area
The sequence spent between grade, determines the range of decrease of luminous flux in corresponding region, the range of decrease is according to low area's brightness degree
Between sequence be incremented by；
The luminous flux in the corresponding region is reduced according to the range of decrease.
A kind of 6. light engine, it is characterised in that according to beam Propagation direction, including：
Illumination path, the light beam sent for receiving and homogenizing projection light source；
Luminous flux control element, it is used for the light beam for receiving the illumination path outgoing, and according to true in display image to be projected
Fixed subregion, subregion carry out luminous flux adjustment to the light beam, wherein, the subregion of different brightness degrees, corresponding to it
The luminous flux adjustment amplitude in region is different in luminous flux control element；
DMD light valves, it is used to receive the light beam after the luminous flux control element adjustment, according to the display image to be projected
Image display drive signals, modulation are projected to the light beam of its own face, and put into projection lens and carry out imaging and show；
The light engine, in addition to control chip, the control chip are used for the view data for obtaining display image to be projected,
Carry out subregion to the display image to be projected according to described image data, the subregion determined in the display image to be projected with
The subregion of the luminous flux control element is corresponding.
7. light engine according to claim 6, it is characterised in that the luminous flux control element is can logical partition
Light penetrating device.
8. light engine according to claim 6, it is characterised in that the luminous flux control element is further used for：
According to brightness degree corresponding to each subregion, subregion corresponding to low brightness levels is determined；
Determine that the low brightness levels correspond to subregion in the corresponding region of the luminous flux control element, reduce the corresponding region
Luminous flux.
9. light engine according to claim 6, it is characterised in that the light is further used for by control element：
According to brightness degree corresponding to each subregion, determine to divide corresponding to low area's brightness degree and low area's brightness degree
Area；
Determine that low area's brightness degree corresponds to subregion in the corresponding region of the luminous flux control element, it is bright according to the low area
The sequence spent between grade, determines the range of decrease of luminous flux in corresponding region, the range of decrease is according to low area's brightness degree
Between sequence be incremented by；
The luminous flux in the corresponding region is reduced according to the range of decrease.
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Effective date of registration: 20200821 Address after: 266599 Qian WAN port road, Huangdao District, Qingdao, Shandong Province, No. 218 Patentee after: Qingdao Hisense Laser Display Co.,Ltd. Address before: Donghai West Road 266071 Shandong city of Qingdao province No. 17 Patentee before: HISENSE Co.,Ltd. |