CN105022208B - Projection arrangement and its control method - Google Patents
Projection arrangement and its control method Download PDFInfo
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- CN105022208B CN105022208B CN201510472834.7A CN201510472834A CN105022208B CN 105022208 B CN105022208 B CN 105022208B CN 201510472834 A CN201510472834 A CN 201510472834A CN 105022208 B CN105022208 B CN 105022208B
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Abstract
The invention discloses a kind of projection arrangement and its control method.Wherein, optic modulating device receives the primary lights that light-source system is produced, and carries out image modulation to primary lights.Each modulation period of each modulating unit of optic modulating device includes multiple modulation periods corresponding to different GTGs.Correspondence GTG is less than or equal to the brightness ratio that the duration of the modulation period of predetermined GTG is more than with corresponding GTG more than the ratio between the duration of the modulation period of predetermined GTG between correspondence GTG.Control device is used for brightness or the fluorescent lifetime for the primary lights for controlling light-source system to be produced within each modulation period so that the ratio between the brightness of primary lights and the product of fluorescent lifetime in each modulation period is equal to the brightness ratio between corresponding GTG of each modulation period.By the above-mentioned means, the duration of GTG relatively small modulation period can be extended, so it is mutually compatible with the switching time of modulating unit.
Description
The application is the Application No. 201110442257.9 that applicant submitted on December 25th, 2011, denomination of invention
For the divisional application of " projection arrangement and its control method ".
Technical field
The present invention relates to optical field, more particularly to a kind of projection arrangement and its control method.
Background technology
At present, projection arrangement is widely used in the various application scenarios such as film broadcasting, meeting and publicity.Projection arrangement
Light modulation techniques are generally divided into three light valve modulation techniques and single light valve modulation technique.In three light valve modulation techniques, three are utilized
Different optic modulating devices modulates the monochromatic light of red-green-blue respectively, produces the monochrome image of each primary lights, then by dividing
Each monochrome image is synthesized a width coloured image by light optical filter or other Multiplexing apparatus, and is imaged on screen.In single light valve
In modulation technique, the periodically fast-changing monochromatic light sequence of RGB is modulated using an optic modulating device, and then
Obtain the corresponding periodically variable primary color image sequence of RGB.Now, as long as the pace of change of image sequence is sufficiently fast, people
Eye can not differentiate each width primary color image, and then the primary color image sequence just synthesizes colour using the persistance of human vision of human eye
Image.
Either three light valve modulation techniques or single light valve modulation technique, optic modulating device is all indispensable one
Point.The light modulation techniques generally used at present mainly include digital optical processing technique (Digital Lighting
Processing, DLP), Liquide Crystal On Silicon (Liquid Crystal on Silicon, LCoS) and lcd technology
(Liquid Crystal Display, LCD) etc..In DLP system, its optic modulating device is digital micro-mirror device (Digital
Micromirror Device, DMD), its operation principle is as shown in Figure 1.Multiple micro mirrors are generally comprised in digital micro-mirror device
Unit 10.The micro mirror unit 10 can quickly be overturn between 11 and 12 in the position shown in the figure 1.Wherein, when micro mirror unit 10 is in
During position 12, incident light 13 is reflected into emergent light 14 by it, and then is collected by follow-up lens 15, and is incided on screen.When
When micro mirror unit 10 is in position 11, incident light 13 is reflected into emergent light 16 by it, and then can not be collected by lens 15.Therefore,
Can be by controlling residence time of the micro mirror unit 10 in position 12 just can be with the overall brightness of respective pixel on control flow curtain.
In the projection arrangement of prior art, the brightness for the primary lights that light source is produced is to maintain constant, is only adjusted by light
Device processed controls the overall brightness of image.For example, being usually by the modulation week of digital micro-mirror device in above-mentioned DLP system
The phase cycle of primary colours light image (its duration be equal to) is divided into multiple modulation periods corresponding to different GTGs, and each GTG pair
Should be in different gray-scale intensities.For example, as shown in Fig. 2 when display image is 5 GTGs, i.e., 25During=32 GTGs, by numeral
5 modulation period 0-4 are divided into the modulation periods of micro-mirror device, wherein each the duration of modulation period is equal to T × 2i-n.Wherein,
T is the modulation period of digital micro-mirror device, and n is the gradation (in fig. 2, n=5) of display image, i=0,1 ..., n-1.
Now, by controlling the state of the micro mirror unit 10 in the different modulating period to obtain 2nThe gray-scale figure of individual different gray-scale intensities
Picture.For example, when the GTG of display image is 17,17=24+20, it is therefore desirable to will be in modulation period 0 and the modulation internal control of period 4
Micro mirror unit 10 processed is in position 12, and controls micro mirror unit 10 to be in position 11 within other periods.When the ash of display image
When rank is 31,31=24+23+22+21+20, it is necessary to position will be in control micro mirror unit 10 within all 5 modulation periods 0-4
12。
However, there is significant limitation in this modulation system, and specifically, in current display standard, image brush
New rate is generally 60Hz, and each image includes three width primary color images.Now, in order to produce 8 GTGs, when modulating the minimum of period
The microsecond of a length of 1/ (60 × 3 × 255) second=21.Now, the switching time of micro mirror unit 10 (is turned to the institute of position 12 from position 11
The time needed) 21 microseconds should be much smaller than.The switching time of current existing micro mirror unit 10 is about 2 microseconds, can be met reluctantly
Use requirement.However, when the digit of GTG is more than 8, such as at 12, the minimum duration of modulation period is only 0.085 microsecond,
Now the switching time of micro mirror unit 10 can not meet use requirement.
Further, the operation principle of other above-described optic modulating devices is similar, be also by control modulating unit from
One state is switched to another state to realize light modulation effect, therefore equally exists switching time and can not be shown with high gray
When modulation period duration it is compatible the problem of.
To sum up, it is desirable to provide a kind of projection arrangement and its control method, with solve prior art projection arrangement it is above-mentioned
Technical problem.
The content of the invention
The present invention solves the technical problem of a kind of projection arrangement and its control method is provided, to solve prior art
Modulation period duration when can not be shown with high gray of switching time of modulating unit of projection arrangement it is compatible the problem of.
In order to solve the above technical problems, the technical scheme that the embodiment of the present invention is used is：A kind of projection arrangement is provided,
Including light-source system, optic modulating device and control device.Light-source system include solid state light emitter and colour wheel, colour wheel be provided with to
Few of the same colour section, color section is periodically arranged in the transmission path of the exciting light of solid state light emitter generation, and exciting light is transmitted
Or wavelength convert, to produce an at least primary lights.Optic modulating device includes multiple modulating units, for receiving primary lights, and right
Primary lights carry out image modulation, and each modulating unit of wherein optic modulating device is provided with multiple modulation periods for primary lights,
Each modulation period includes multiple modulation periods corresponding to different GTGs, wherein corresponding GTG is less than or equal to predetermined GTG
Modulate the ratio that the duration and corresponding GTG of period be more than between the duration of the modulation period of predetermined GTG be more than corresponding GTG it
Between brightness ratio, and the duration of each modulation period is all higher than more than 5 times of the switching time of modulating unit.Control device is used for
The brightness for the primary lights that control light-source system is produced within each modulation period or fluorescent lifetime so that the primary colours in each modulation period
Ratio between the brightness of light and the product of fluorescent lifetime is equal to the brightness ratio between corresponding GTG of each modulation period.
Wherein, the base that correspondence GTG is less than or equal in the modulation period of predetermined GTG by control device control light-source system
The brightness of coloured light is set smaller than the brightness that correspondence GTG is more than the primary lights in the modulation period of predetermined GTG.
Wherein, optic modulating device produces the synchronizing signal of one and each modulation period synchronization, and control device is according to synchronizing signal
Control light-source system.
Wherein, correspondence GTG is equal less than or equal to the duration of the modulation period of predetermined GTG.
Wherein, control device sets the brightness that correspondence GTG is more than the primary lights in the part modulation period of predetermined GTG
It is set to the brightness for the primary lights being more than more than correspondence GTG in another part of predetermined GTG modulation period.
Wherein, the brightness of the primary lights in another part modulation period is equal.
Wherein, the part modulation period is the correspondence GTG highest modulation period.
Wherein, between the brightness of each modulation period correspondence GTG into waiting than setting.
Wherein, at least part modulation period in multiple modulation periods is divided into time upper spaced at least two modulation
Sub-period.
In order to solve the above technical problems, the technical scheme that the embodiment of the present invention is used is：A kind of projection arrangement is provided
Control method, including：An at least primary lights are produced using light-source system, light-source system includes solid state light emitter and colour wheel, color
Wheel is provided with least of the same colour section, and color section is periodically arranged in the transmission path of the exciting light of solid state light emitter generation, and to exciting
Light is transmitted or wavelength convert, to produce primary lights；Primary lights are received using the optic modulating device including multiple modulating units,
And primary lights are carried out with image modulation, wherein each modulating unit of optic modulating device is provided with multiple modulation weeks for primary lights
Phase, each modulation period includes multiple modulation periods corresponding to different GTGs, wherein corresponding GTG is less than or equal to predetermined ash
The ratio that the duration of the modulation period of rank is more than with corresponding GTG between the duration of the modulation period of predetermined GTG is more than correspondence ash
Brightness ratio between rank, and the duration of each modulation period is all higher than more than 5 times of the switching time of modulating unit；Utilize control
Device controls brightness or fluorescent lifetime of the light-source system in each primary lights modulated and produced in the period so that in each modulation period
Ratio between the brightness of primary lights and the product of fluorescent lifetime is equal to the brightness ratio between corresponding GTG of each modulation period.
The beneficial effects of the invention are as follows：Prior art is different from, projection arrangement of the invention and its control method are by inciting somebody to action
Correspondence GTG is less than or equal to the duration and corresponding GTG of the modulation period of predetermined GTG more than the modulation period of predetermined GTG
Ratio setting between duration controls light-source system to be produced within each modulation period into more than the brightness ratio between correspondence GTG
The brightness of raw primary lights or fluorescent lifetime so that between the brightness of primary lights and the product of fluorescent lifetime in each modulation period
Ratio be equal to brightness ratio between each modulation period corresponding GTG, correspondence GTG can be caused to be less than or equal to predetermined ash
The duration of the modulation period of rank is fully extended, and then mutually compatible with the switching time of modulating unit.
Brief description of the drawings
Fig. 1 is the fundamental diagram of the digital micro-mirror device of prior art；
Fig. 2 is the schematic diagram of the modulation period segmentation of the modulation period of the projection arrangement of prior art；
Fig. 3 is the structural representation of an embodiment of projection arrangement of the present invention；
Fig. 4 is the front view of the colour wheel of the projection arrangement shown in Fig. 3；
Fig. 5 is the flow chart of an embodiment of the control method of projection arrangement of the present invention.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and examples.
Fig. 3 is referred to, Fig. 3 is the structural representation of an embodiment of the light-source system of the present invention.As shown in figure 3, this reality
Applying the light-source system of example mainly includes light-source system 20, light collecting device 21, optic modulating device 22, projection arrangement 23 and control
Device 24.
In the present embodiment, light-source system 20 includes solid state light emitter 201, colour wheel 202 and drive device 203.Solid-state light
The exciting light that source 201 is produced is incided on colour wheel 202.The cyclic drive colour wheel 202 of drive device 203 is turned around specific rotating shaft
It is dynamic.
Fig. 4 is referred to, Fig. 4 is the front view of the colour wheel 202 shown in Fig. 3.As shown in figure 4, colour wheel 202 is included along its circumference
Red light color section R, green light color section G and the blue light color section B of setting, the exciting light that solid state light emitter 201 is produced is through the section effect point of above-mentioned color
Chan Sheng not feux rouges, green glow and blue light.It is red light color section R, green during the driving periodic rotary of colour wheel 202 of drive device 203
Photochromic section of G and blue light color section B is alternately and periodicity is arranged in the transmission path of the exciting light of the generation of solid state light emitter 201, and then
So that light-source system 20 periodically exports red-green-blue light sequence.
In the present embodiment, when the exciting light that solid state light emitter 201 is produced is ultraviolet or near ultraviolet excitated smooth, red light color section
Can be set to can be set on red light wavelength transition material, green light color section G on R can then set on green wavelength transition material, blue light color section B
Put blue light wavelength transition material.When the exciting light that solid state light emitter 201 is produced is blue light exciting light, blue light color section B then can be set
Into the transmission blue light exciting light.Above-mentioned material for transformation of wave length can be fluorescent material, quanta point material or can change exciting light
Into the other materials of the Stimulated Light of appropriate color.
In the present embodiment, colour wheel 202 is arranged to wheel-like structure, and being rotated by drive device 203.At other
In embodiment, colour wheel 202 can also be arranged to the banded structure in the driving periodical translation of drive device 203, or set
The tubular structure that the driving periodical being set in drive device 203 is rotated.Further, light-source system 20 can also be by other bases
Replaced in colour wheel and other light sources system that display primary lights can be produced.
In the present embodiment, the primary lights that light-source system 20 is produced are collected through light collecting device 21, even light or shaping
Deng processing after incide optic modulating device 22.Optic modulating device 22 includes multiple modulating units 221.Optic modulating device 22 receives light
The primary lights that collection device 21 is exported, and image modulation is carried out to the primary lights.Optic modulating device 22 is carried out after image modulation
Primary lights are projected on screen 30 through projection arrangement 23.In the present embodiment, the pin of each modulating unit 221 of optic modulating device 22
Primary lights are both provided with multiple modulation periods, includes multiple modulation periods corresponding to different GTGs each modulation period, its
When the duration for the modulation period that middle correspondence GTG is less than or equal to predetermined GTG is more than the modulation of the predetermined GTG with corresponding GTG
Ratio between the duration of section is more than the brightness ratio between correspondence GTG, and the duration of each modulation period is single much larger than modulation
The switching time of member 221.For example, respectively the duration of modulation period be set greater than 5 times of switching time of modulating unit 221 with
On, preferably more than 10 times.In the present embodiment, the predetermined GTG is according to the gradation of display image, modulating unit 221
Modulation period and the switching time of modulating unit 221 predefine, and the switching time of generally modulating unit 221 can just
The GTG of support.Preferably, predetermined GTG is more than more than 10 times of switching time of modulating unit for the duration of modulation period
Minimum GTG in each GTG, the predetermined GTG can be by obtaining to being solved with lower inequality：
(((1/ image refresh rate) × primary colours dutycycle)/2n)×2i>Switching time × 10
Wherein, n is the gradation of display image, i=0,1 ..., n-1., will be minimum in the solution of the inequality after solution
I be used as predetermined grey decision-making.
In the present embodiment, optic modulating device 22 produces the synchronizing signal of one and each modulation period synchronization, and is sent to control
Device 24 processed.Control device 24 controls light-source system 20 in the bright of each primary lights modulated and produced in the period according to the synchronizing signal
Degree or fluorescent lifetime so that the ratio between the brightness of primary lights and the product of fluorescent lifetime in each modulation period is equal to each adjust
Brightness ratio between period processed corresponding GTG.For example, control device 24 control light-source system 20 will correspondence GTG be less than or
Brightness equal to the primary lights in the modulation period of above-mentioned predetermined GTG is set smaller than correspondence GTG and is more than above-mentioned predetermined GTG
The modulation period in primary lights brightness, and cause primary colours brightness and fluorescent lifetime in each modulation period (during modulation
The duration of section) product between ratio be equal to brightness ratio between each modulation period corresponding GTG.In other embodiment
In, control device 24 can also by suitable control light-source system 20 it is each modulation the period produce primary lights fluorescent lifetime come
So that the primary colours brightness in each modulation period and the ratio between the product of fluorescent lifetime are equal to corresponding ash of each modulation period
Brightness ratio between rank.
In other embodiments, optic modulating device 22 can also be by receiving from same clock with control device 24 respectively
The synchronizing clock signals in source are cooperated.
By the above-mentioned means, the duration that correspondence GTG is less than or equal to the modulation period of above-mentioned predetermined GTG can be extended,
So that the duration of each modulation period of optic modulating device 22 be sufficiently above modulating unit 221 switching time, and then with modulation
The switching time of unit 221 is mutually compatible.
The present invention will be described in detail by taking 16 GTGs as an example below, but those skilled in the art be fully contemplated that by
Technical scheme is applied in the projection arrangement of other digit GTGs.
In following citing, the 60Hz described in background technology is all used for refresh rate, and assume coloured image by red
Turquoise tristimulus image composition, the duration of the modulation period of each width primary color image is identical, then the modulation of each primary color image
The duration in cycle is approximately 5.57 milliseconds.But, in actual applications, the duration of the modulation period of each primary color image can not
Together, such case has no effect on the implementation of the present invention.
Wherein, the brightness of the primary lights produced when the scheme control light-source system 20 using prior art is in each modulation period
When keeping constant, the duration of each GTG corresponding modulation period of optic modulating device 22 and the correspondence pass of corresponding gray-scale intensity
It is as shown in table 1 below：
Table 1
| Primary colours brightness | GTG | Modulate the duration (microsecond) of period | Gray-scale intensity |
| 1 | 15 | 2785.28 | 2785.28 |
| 1 | 14 | 1392.64 | 1392.64 |
| 1 | 13 | 696.32 | 696.32 |
| 1 | 12 | 348.16 | 348.16 |
| 1 | 11 | 174.08 | 174.08 |
| 1 | 10 | 87.04 | 87.04 |
| 1 | 9 | 43.52 | 43.52 |
| 1 | 8 | 21.76 | 21.76 |
| 1 | 7 | 10.88 | 10.88 |
| 1 | 6 | 5.44 | 5.44 |
| 1 | 5 | 2.72 | 2.72 |
| 1 | 4 | 1.36 | 1.36 |
| 1 | 3 | 0.68 | 0.68 |
| 1 | 2 | 0.34 | 0.34 |
| 1 | 1 | 0.17 | 0.17 |
| 1 | 0 | 0.085 | 0.085 |
In upper table 1, the brightness for the primary lights that light-source system 20 is produced within each modulation period keeps constant, and uses unit
Brightness 1 represents, the gray-scale intensity of each GTG be equal to primary lights brightness be multiplied by fluorescent lifetime (in table 1, as corresponding modulating when
The duration of section), and the gray-scale intensity of the duration of each modulation period and correspondence GTG is set into grade ratio in table 1.In other implementations
In example, the duration of each modulation period and the gray-scale intensity of each GTG can also be set using other modes.
From upper table 1, the duration of the GTG 0-7 corresponding modulation periods less than or equal to 7 is micro- less than or equal to 10.88
Second, its for the switching time (for example, microsecond of switching time 2 of DMD micro mirror unit) of light-modulating cell 221
It is too short, cause the duration of GTG 0-7 corresponding modulation periods can not be compatible with the switching time of light-modulating cell 221.
In the present invention, by by the duration of duration and the GTG 8-15 of GTG 0-7 modulation period modulation period it
Between ratio setting control light-source system 20 by GTG into more than the brightness ratio between correspondence GTG, and by control device 24
The brightness of primary lights in the 0-7 corresponding modulation periods is set smaller than the primary lights in the GTG 8-15 corresponding modulation periods
Brightness, and then extend the duration of GTG 0-7 corresponding modulation periods, it is as shown in table 2 below that it specifically adjusts result：
Table 2
| Primary colours brightness | GTG | Modulate the duration (microsecond) of period | Gray-scale intensity |
| 1 | 15 | 2785.28 | 2785.28 |
| 1 | 14 | 1392.64 | 1392.64 |
| 1 | 13 | 696.32 | 696.32 |
| 1 | 12 | 348.16 | 348.16 |
| 1 | 11 | 174.08 | 174.08 |
| 1 | 10 | 87.04 | 87.04 |
| 1 | 9 | 43.52 | 43.52 |
| 1 | 8 | 21.76 | 21.76 |
| 0.5 | 7 | 21.76 | 10.88 |
| 0.25 | 6 | 21.76 | 5.44 |
| 0.125 | 5 | 21.76 | 2.72 |
| 0.0625 | 4 | 21.76 | 1.36 |
| 0.03125 | 3 | 21.76 | 0.68 |
| 0.015625 | 2 | 21.76 | 0.34 |
| 0.007813 | 1 | 21.76 | 0.17 |
| 0.003906 | 0 | 21.76 | 0.085 |
In table 2, primary colours brightness and corresponding modulating period in GTG 8-15 more than the 7 corresponding modulation period when
It is long to keep constant compared with table 1, and the duration of the GTG 0-7 corresponding modulation periods less than or equal to 7 is prolonged compared with table 1
It is long, while the primary colours brightness in the GTG 0-7 corresponding modulation periods is reduced compared with table 1 so that each GTG 0-15 is corresponding
The brightness of primary lights in the modulation period keeps constant with the product of fluorescent lifetime (duration of modulation period) compared with table 1.Enter
And, in the case where the corresponding gray-scale intensity holding predetermined ratio of each modulation period is constant so that during the corresponding modulation of GTG 0-7
The duration of section is sufficiently above the switching time of light-modulating cell 221.Specifically, in table 2, by the corresponding modulation of GTG 0-7
The duration of period is arranged to equal, and specifically extends to 21.76 microseconds, while by the GTG 0-7 corresponding modulation periods
Primary colours brightness is arranged to wait than declining.In other embodiments, can also be by the primary lights of GTG 0-7 corresponding modulation periods
Luminance-reduction to same brightness, now the GTG 0-7 corresponding modulation periods when grow up to and wait than changing, but be necessary to ensure that each modulation
The minimum duration of period is sufficiently above the switching time of light-modulating cell 221.
In table 2, due to the primary colours brightness and the duration of corresponding modulating period in the GTG 8-15 corresponding modulation periods
Keep constant, and add the duration of GTG 0-7 corresponding modulation periods, the modulation period that result in modulating device 22 is (each
Modulate the duration summation of period) become big.In order to which the modulation period for keeping modulating device 22 equally keeps constant, the present invention is further
Improve the primary colours brightness in GTG 8-15 corresponding at least part modulation period, and reduce accordingly the corresponding modulating period when
It is long so as to keep constant the modulation period of modulating device 22, shown in table 3 specific as follows：
Table 3
| Primary colours brightness | GTG | Modulate the duration (microsecond) of period | Gray-scale intensity |
| 1.058 | 15 | 2632.88 | 2785.28 |
| 1 | 14 | 1392.64 | 1392.64 |
| 1 | 13 | 696.32 | 696.32 |
| 1 | 12 | 348.16 | 348.16 |
| 1 | 11 | 174.08 | 174.08 |
| 1 | 10 | 87.04 | 87.04 |
| 1 | 9 | 43.52 | 43.52 |
| 1 | 8 | 21.76 | 21.76 |
| 0.5 | 7 | 21.76 | 10.88 |
| 0.25 | 6 | 21.76 | 5.44 |
| 0.125 | 5 | 21.76 | 2.72 |
| 0.0625 | 4 | 21.76 | 1.36 |
| 0.03125 | 3 | 21.76 | 0.68 |
| 0.015625 | 2 | 21.76 | 0.34 |
| 0.007813 | 1 | 21.76 | 0.17 |
| 0.003906 | 0 | 21.76 | 0.085 |
In table 3, the primary colours brightness in the GTG 8-14 corresponding modulation periods keeps constant and equal, improves GTG bright
The primary colours brightness spent in the corresponding modulation period of highest GTG 15, was larger than in the GTG 8-14 corresponding modulation periods
Primary colours brightness, while reducing the duration of the corresponding modulation period of GTG 15 so that each GTG 0-15 is corresponding to be modulated in the period
Primary colours brightness and fluorescent lifetime (duration of corresponding modulating period) product and the duration summation (modulation of each modulation period
Cycle) keep constant compared with table 1.
In addition it is also possible to improve the primary lights in two or more GTGs corresponding modulation period in GTG 8-15
Brightness, and reduce the duration of corresponding modulating period accordingly, to ensure that the duration summation of each modulation period keeps constant.For example,
The primary colours brightness in the corresponding modulation period of GTG 15 and 13 is improved simultaneously, is larger than GTG 8-12,14 corresponding modulation
Primary colours brightness in period, while reducing the duration of the corresponding modulation period of GTG 15 and 13 so that each GTG 0-15 correspondences
The modulation period in primary colours brightness and corresponding modulating period duration product and the duration summation of each modulation period with
Table 1 is constant compared to holding.
Invention further provides a kind of control method of projection arrangement, following steps are specifically included.
In step S41, an at least primary lights are produced using light-source system, light-source system includes solid state light emitter and color
Wheel, colour wheel is provided with least of the same colour section, and color section is periodically arranged in the transmission path of the exciting light of solid state light emitter generation, and right
Exciting light is transmitted or wavelength convert, to produce primary lights.
In step S42, primary lights are received using the optic modulating device including multiple modulating units, and primary lights are carried out
Each modulating unit of image modulation, wherein optic modulating device is provided with multiple modulation periods for primary lights, each modulation week
Phase includes multiple modulation periods corresponding to different GTGs, wherein corresponding GTG is less than or equal to the modulation period of predetermined GTG
Duration is more than the brightness ratio that the ratio between the duration of the modulation period of predetermined GTG is more than between correspondence GTG with corresponding GTG
Example, and the duration of each modulation period is all higher than more than 5 times of the switching time of modulating unit.
In step S43, light-source system is controlled in the brightness of each primary lights modulated and produced in the period using control device
Or fluorescent lifetime so that the ratio between the brightness of primary lights and the product of fluorescent lifetime in each modulation period is equal to each modulation
Brightness ratio between period corresponding GTG.
The process that implements of above-mentioned steps is hereinbefore described in detail, will not be repeated here.
In the above-described embodiments, the setting continuous in time that each modulation period can be as described in background technology, but can
To be to be arranged at intervals in time, i.e., at least partly the modulation period is divided into the time upper spaced at least two modulation period of the day from 11 p.m. to 1 a.m
Section, it is possible thereby to which solving each modulation period continuously sets the issuable scintillation of institute.In addition, those skilled in the art are at this
Above-mentioned technical proposal can be applied to completely under the enlightenment of invention using three light valve modulation techniques or use other modulating devices
Projection arrangement in.
By the above-mentioned means, the projection arrangement and its control method of the present invention are predetermined by the way that correspondence GTG is less than or equal to
Duration and the corresponding GTG of the modulation period of GTG is more than ratio setting between the duration for modulating the period of predetermined GTG into big
Brightness ratio between correspondence GTG, and light-source system is controlled in the brightness or luminous of each primary lights modulated and produced in the period
Time so that the ratio between the brightness of primary lights and the product of fluorescent lifetime in each modulation period is equal to each modulation period pair
Brightness ratio between the GTG answered, can cause correspondence GTG to be obtained less than or equal to the duration of the modulation period of predetermined GTG
Fully extension, and then mutually compatible with the switching time of modulating unit.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair
Equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of projection arrangement, it is characterised in that the projection arrangement includes：
Light-source system, for producing an at least primary lights；
Optic modulating device, including multiple modulating units, image tune is carried out for receiving the primary lights, and to the primary lights
System, wherein each modulating unit of the optic modulating device is provided with multiple modulation periods for the primary lights, each modulation
Cycle includes multiple modulation periods corresponding to different GTGs, wherein corresponding GTG is less than or equal to the modulation period of predetermined GTG
Duration and corresponding GTG be more than the ratio between the duration of the modulation period of the predetermined GTG and be more than between correspondence GTG
Brightness ratio, and the duration of each modulation period is all higher than more than 5 times of the switching time of the modulating unit, wherein, it is right
Answer GTG be less than or equal to the predetermined GTG each modulation period primary colours brightness it is identical and when grow up to wait than change；
Control device, for controlling the light-source system in each brightness for modulating the primary lights produced in the period or hair
Between light time so that the ratio between the brightness of the primary lights and the product of fluorescent lifetime in each modulation period is equal to each
The brightness ratio modulated between period corresponding GTG.
2. projection arrangement according to claim 1, it is characterised in that the control device controls the light-source system will be right
Brightness of the GTG less than or equal to the primary lights in the modulation period of the predetermined GTG is answered to be set smaller than correspondence GTG
More than the brightness of the primary lights in the modulation period of the predetermined GTG.
3. projection arrangement according to claim 1, it is characterised in that the optic modulating device produces one and each modulation
The synchronizing signal of period synchronization, the control device controls the light-source system according to the synchronizing signal.
4. projection arrangement according to claim 1, it is characterised in that the light-source system includes solid state light emitter and color
Wheel, the colour wheel is provided with least of the same colour section, and the color section is periodically arranged at the biography for the exciting light that the solid state light emitter is produced
On defeated path, and the exciting light is transmitted or wavelength convert, to produce an at least primary lights.
5. projection arrangement according to claim 1, it is characterised in that correspondence GTG is more than described pre- by the control device
The brightness for determining the primary lights in the part modulation period of GTG is set greater than correspondence GTG more than the predetermined GTG
Another part modulation the period in the primary lights brightness.
6. projection arrangement according to claim 5, it is characterised in that the primary colours in another part modulation period
The brightness of light is equal.
7. projection arrangement according to claim 5, it is characterised in that the part modulation period is correspondence GTG highest
The modulation period.
8. projection arrangement according to claim 1, it is characterised in that the predetermined GTG is more than for the duration of modulation period
Minimum GTG in more than 10 times of each GTG of the switching time of the modulating unit.
9. the projection arrangement according to claim 1-8 any one, it is characterised in that in the multiple modulation period extremely
The small part modulation period is divided into time upper spaced at least two modulation sub-period.
10. a kind of control method of projection arrangement, it is characterised in that the control method includes：
An at least primary lights are produced using light-source system；
The primary lights are received using the optic modulating device including multiple modulating units, and image tune is carried out to the primary lights
System, wherein each modulating unit of the optic modulating device is provided with multiple modulation periods for the primary lights, each modulation
Cycle includes multiple modulation periods corresponding to different GTGs, wherein corresponding GTG is less than or equal to the modulation period of predetermined GTG
Duration and corresponding GTG be more than the ratio between the duration of the modulation period of the predetermined GTG and be more than between correspondence GTG
Brightness ratio, and the duration of each modulation period is all higher than more than 5 times of the switching time of the modulating unit, wherein, it is right
Answer GTG be less than or equal to the predetermined GTG each modulation period primary colours brightness it is identical and when grow up to wait than change；
The light-source system is controlled in each brightness for modulating the primary lights produced in the period or hair using control device
Between light time so that the ratio between the brightness of the primary lights and the product of fluorescent lifetime in each modulation period is equal to each
The brightness ratio modulated between period corresponding GTG.
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| CN201510472834.7A CN105022208B (en) | 2011-12-25 | 2011-12-25 | Projection arrangement and its control method |
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| CN104423125B (en) * | 2013-08-29 | 2016-03-09 | 台达电子工业股份有限公司 | GTG control method and optical projection system |
| CN105467733B (en) * | 2014-08-25 | 2018-08-28 | 深圳市光峰光电技术有限公司 | Projection display system and its control method |
| CN105991980B (en) | 2015-02-06 | 2019-05-03 | 深圳光峰科技股份有限公司 | Optical projection system and its control method |
| CN106855679B (en) * | 2015-12-08 | 2019-05-03 | 深圳光峰科技股份有限公司 | Projection arrangement and its control method |
| JP6561006B2 (en) * | 2016-03-29 | 2019-08-14 | 株式会社日立エルジーデータストレージ | Video display device |
| CN107547878B (en) * | 2016-06-24 | 2019-11-08 | 深圳光峰科技股份有限公司 | Optical projection system and image modulation method |
| CN107632485B (en) * | 2016-07-19 | 2019-08-27 | 深圳光峰科技股份有限公司 | Colour wheel mould group, light emitting device and optical projection system |
| CN107688273B (en) * | 2016-08-06 | 2019-07-16 | 深圳光峰科技股份有限公司 | Display system and image modulation method |
| CN109120859B (en) * | 2017-06-26 | 2022-03-25 | 深圳光峰科技股份有限公司 | Image data processing device, shooting equipment and display system |
| CN111240145B (en) * | 2018-11-29 | 2022-04-15 | 青岛海信激光显示股份有限公司 | Light valve driving control method and projection equipment |
| CN111866477B (en) * | 2019-04-30 | 2023-04-11 | 深圳光峰科技股份有限公司 | Image forming apparatus and method |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN102854715A (en) | 2013-01-02 |
| CN105022208A (en) | 2015-11-04 |
| CN105005171B (en) | 2017-03-22 |
| CN102854715B (en) | 2015-12-09 |
| CN105005171A (en) | 2015-10-28 |
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