CN102854715B - Projection arrangement and control method thereof - Google Patents
Projection arrangement and control method thereof Download PDFInfo
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- CN102854715B CN102854715B CN201110442257.9A CN201110442257A CN102854715B CN 102854715 B CN102854715 B CN 102854715B CN 201110442257 A CN201110442257 A CN 201110442257A CN 102854715 B CN102854715 B CN 102854715B
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Abstract
The invention discloses a kind of projection arrangement and control method thereof.Wherein, optic modulating device receives the primary lights that light-source system produces, and carries out image modulation to primary lights.Comprise the multiple modulation periods corresponding to different GTG each modulation period of each modulating unit of optic modulating device.Ratio between the duration that the duration that corresponding GTG is less than or equal to the modulation period of predetermined GTG and corresponding GTG are greater than the modulation period of predetermined GTG is greater than the brightness ratio between corresponding GTG.Control device, for the brightness of primary lights that controls light-source system and produce within each modulation period or fluorescent lifetime, makes the ratio between the brightness of the primary lights in each modulation period and the product of fluorescent lifetime equal each brightness ratio of modulating between GTG corresponding to period.By the way, the duration of GTG relatively little modulation period can be extended, so mutually compatible with the switching time of modulating unit.
Description
Technical field
The present invention relates to optical field, particularly relate to a kind of projection arrangement and control method thereof.
Background technology
At present, projection arrangement is widely used in the various application scenarios such as film broadcasting, meeting and publicity.The light modulation techniques of projection arrangement is generally divided into three light valve modulation techniques and single light valve modulation technique.In three light valve modulation techniques, three different optic modulating devices are utilized to modulate the monochromatic light of red-green-blue respectively, produce the monochrome image of each primary lights, then by light splitting optical filter or other Multiplexing apparatus, each monochrome image is synthesized a width coloured image, and image on screen.In single light valve modulation technique, utilize an optic modulating device to modulate the fast-changing monochromatic light sequence of RGB periodicity, 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 enough fast, human eye cannot differentiate each width primary color image, and then this primary color image sequence synthesizes coloured image with regard to utilizing the persistance of human vision of human eye.
No matter be three light valve modulation techniques or single light valve modulation technique, optic modulating device is all an indispensable part.The light modulation techniques generally used at present mainly comprises digital light treatment technology (DigitalLightingProcessing, DLP), Liquide Crystal On Silicon (LiquidCrystalonSilicon, and lcd technology (LiquidCrystalDisplay, LCD) etc. LCoS).In DLP system, its optic modulating device is digital micro-mirror device (DigitalMicromirrorDevice, DMD), and its principle of work as shown in Figure 1.Multiple micro mirror unit 10 is generally comprised in digital micro-mirror device.This micro mirror unit 10 can overturn between 11 and 12 in the position shown in the figure 1 fast.Wherein, when micro mirror unit 10 is in position 12, incident light 13 is reflected into emergent light 14 by it, and then is collected by follow-up lens 15, and incides on screen.When micro mirror unit 10 is in position 11, incident light 13 is reflected into emergent light 16 by it, and then cannot be collected by lens 15.Therefore, just can control the overall brightness of respective pixel on screen in the residence time of position 12 by control micro mirror unit 10.
In the projection arrangement of prior art, the brightness of the primary lights that light source produces remains unchanged, and controls the overall brightness of image by means of only optic modulating device.Such as, in above-mentioned DLP system, be generally the multiple modulation periods modulation period of digital micro-mirror device (its duration equals the cycle of primary lights image) is divided into corresponding to different GTG, and each GTG correspond to different gray-scale intensity.Such as, as shown in Figure 2, when display image is 5 GTGs, namely 2
5during=32 GTGs, be divided into the modulation period of digital micro-mirror device 5 to modulate period 0-4, wherein the duration of each modulation period equals T × 2
i-n.Wherein, T is the modulation period of digital micro-mirror device, and n is the GTG figure place (in fig. 2, n=5) of display image, i=0,1......, n-1.Now, the state by controlling the micro mirror unit 10 in the different modulating period can obtain 2
nthe gray scale image of individual different gray-scale intensity.Such as, when the GTG showing image is 17,17=2
4+ 2
0, therefore need control micro mirror unit 10 within modulation period 0 and modulation period 4 to be in position 12, and within other periods, control micro mirror unit 10 be in position 11.When the GTG showing image is 31,31=2
4+ 2
3+ 2
2+ 2
1+ 2
0, needs will control micro mirror unit 10 and be in position 12 in whole 5 modulation period 0-4.
But this modulation system exists significant limitation, specifically, in current display standard, image refresh rate is generally 60Hz, and every width image comprises three width primary color images.Now, in order to produce 8 GTGs, modulation the period minimum duration be 1/ (60 × 3 × 255) second=21 microseconds.Now, the switching time (being turned to the time needed for position 12 from position 11) of micro mirror unit 10 should much smaller than 21 microseconds.The switching time of current existing micro mirror unit 10 is about 2 microseconds, can meet request for utilization reluctantly.But, when the figure place of GTG is more than 8, such as 12 time, modulation the period minimum duration be only 0.085 microsecond, now cannot meet request for utilization the switching time of micro mirror unit 10.
Further, the principle of work of other optic modulating devices above-described is similar, also be switched to another state by control modulating unit from a state to realize optical modulation effect, therefore there is the problem of modulation period duration compatibility when cannot show with high gray switching time equally.
To sum up, need to provide a kind of projection arrangement and control method thereof, to solve the above-mentioned technical matters of the projection arrangement of prior art.
Summary of the invention
The technical matters that the present invention mainly solves is to provide a kind of projection arrangement and control method thereof, the problem of modulation period duration compatibility when cannot show with high gray with the switching time solving the modulating unit of the projection arrangement of prior art.
For solving the problems of the technologies described above, the technical scheme that the embodiment of the present invention adopts is: provide a kind of projection arrangement, comprise light-source system, optic modulating device and control device.Light-source system comprises solid state light emitter and colour wheel, and colour wheel is provided with at least of the same colour section, and look section is periodically arranged on the transmission path of the exciting light that solid state light emitter produces, and carries out transmission or wavelength convert to exciting light, to produce at least one primary lights.Optic modulating device comprises multiple modulating unit, for receiving primary lights, and image modulation is carried out to primary lights, wherein each modulating unit of optic modulating device is provided with multiple modulation period for primary lights, comprise the multiple modulation periods corresponding to different GTG each modulation period, wherein the corresponding GTG duration that is less than or equal to the modulation period of predetermined GTG and corresponding GTG be greater than the modulation period of predetermined GTG duration between ratio be greater than brightness ratio between corresponding GTG, and the duration of each modulation period is all greater than more than 5 times of the switching time of modulating unit.Control device, for the brightness of primary lights that controls light-source system and produce within each modulation period or fluorescent lifetime, makes the ratio between the brightness of the primary lights in each modulation period and the product of fluorescent lifetime equal each brightness ratio of modulating between GTG corresponding to period.
Wherein, control device controls the brightness of primary lights that corresponding GTG is less than or equal in the modulation period of predetermined GTG by light-source system and is arranged to be less than the brightness that corresponding GTG is greater 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 controls light-source system according to synchronizing signal.
Wherein, to be less than or equal to the duration of the modulation period of predetermined GTG equal for corresponding GTG.
Wherein, the control device brightness of primary lights be greater than by corresponding GTG in the part modulation period of predetermined GTG is arranged to be greater than the brightness that corresponding GTG is greater than the primary lights in another part modulation period of predetermined GTG.
Wherein, the brightness of the primary lights in another part modulation period is equal.
Wherein, the part modulation period is the modulation period that corresponding GTG is the highest.
Wherein, geometric ratio is become to arrange between each brightness of modulating period corresponding GTG.
Wherein, at least part of modulation period in multiple modulation period is divided into time upper spaced at least two modulation sub-periods.
For solving the problems of the technologies described above, the technical scheme that the embodiment of the present invention adopts is: the control method providing a kind of projection arrangement, comprise: utilize light-source system to produce at least one primary lights, light-source system comprises solid state light emitter and colour wheel, colour wheel is provided with at least of the same colour section, look section is periodically arranged on the transmission path of the exciting light that solid state light emitter produces, and carries out transmission or wavelength convert to exciting light, to produce primary lights; The optic modulating device comprising multiple modulating unit is utilized to receive primary lights, and image modulation is carried out to primary lights, wherein each modulating unit of optic modulating device is provided with multiple modulation period for primary lights, comprise the multiple modulation periods corresponding to different GTG each modulation period, wherein the corresponding GTG duration that is less than or equal to the modulation period of predetermined GTG and corresponding GTG be greater than the modulation period of predetermined GTG duration between ratio be greater than brightness ratio between corresponding GTG, and the duration of each modulation period is all greater than more than 5 times of the switching time of modulating unit; Utilize control device the to control brightness of primary lights that light-source system produces within each modulation period or fluorescent lifetime, makes the ratio between the brightness of the primary lights in each modulation period and the product of fluorescent lifetime equal each brightness ratio of modulating between GTG corresponding to period.
The invention has the beneficial effects as follows: be different from prior art, projection arrangement of the present invention and control method thereof become to be greater than the brightness ratio between corresponding GTG by the duration that corresponding GTG is less than or equal to the modulation period of predetermined GTG and the corresponding GTG ratio setting be greater than between the duration of the modulation period of predetermined GTG, and control brightness or the fluorescent lifetime of the primary lights that light-source system produces within each modulation period, the ratio between the brightness of primary lights in each modulation period and the product of fluorescent lifetime is made to equal each brightness ratio of modulating between GTG corresponding to period, the duration that corresponding GTG can be made to be less than or equal to the modulation period of predetermined GTG is fully extended, and then it is mutually compatible with the switching time of modulating unit.
Accompanying drawing explanation
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 process flow diagram of an embodiment of the control method of projection arrangement of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
Refer to Fig. 3, Fig. 3 is the structural representation of an embodiment of light-source system of the present invention.As shown in Figure 3, the light-source system of the present embodiment mainly comprises 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 comprises solid state light emitter 201, colour wheel 202 and drive unit 203.The exciting light that solid state light emitter 201 produces incides on colour wheel 202.Drive unit 203 cyclic drive colour wheel 202 rotates around specific rotating shaft.
Refer to Fig. 4, Fig. 4 is the front view of the colour wheel 202 shown in Fig. 3.As shown in Figure 4, colour wheel 202 comprises red light color section R, the green light color section G and blue light color section B that arrange along its circumference, and the exciting light that solid state light emitter 201 produces produces ruddiness, green glow and blue light respectively through the effect of above-mentioned look section.Drive in the process of colour wheel 202 periodic rotary at drive unit 203, red light color section R, green light color section G and blue light color section B replace and are periodically arranged on the transmission path of the exciting light that solid state light emitter 201 produces, and then make light-source system 20 periodically export red-green-blue light sequence.
In the present embodiment, when solid state light emitter 201 produce exciting light be ultraviolet or near ultraviolet excitated smooth time, red light color section R can arrange red light wavelength transition material, green light color section G can arrange green wavelength transition material, blue light color section B then can arrange blue light wavelength transition material.When solid state light emitter 201 produce exciting light be blue-light excited smooth time, blue light color section B then can be arranged to this blue-light excited light of transmission.Above-mentioned material for transformation of wave length can be the other materials that exciting light maybe can be converted to the Stimulated Light of appropriate color by fluorescent powder, quanta point material.
In the present embodiment, colour wheel 202 is arranged to wheel-like structure, and rotates under the driving of drive unit 203.In other embodiments, colour wheel 202 also can be the banded structure of the driving periodical translation being arranged in drive unit 203, or the tubular structure that the driving periodical being arranged in drive unit 203 rotates.Further, light-source system 20 also can by other based on colour wheel and the other light sources system that can produce display primary lights replaced.
In the present embodiment, optic modulating device 22 is incided after the process such as the primary lights that light-source system 20 produces carry out collecting through light collecting device 21, even light or shaping.Optic modulating device 22 comprises multiple modulating unit 221.Optic modulating device 22 receives the primary lights that light collecting device 21 exports, and carries out image modulation to these primary lights.Primary lights after optic modulating device 22 carries out image modulation project on screen 30 through projection arrangement 23.In the present embodiment, each modulating unit 221 of optic modulating device 22 is provided with multiple modulation period for primary lights, comprise the multiple modulation periods corresponding to different GTG each modulation period, wherein the corresponding GTG duration that is less than or equal to the modulation period of predetermined GTG and corresponding GTG be greater than the modulation period of this predetermined GTG duration between ratio be greater than brightness ratio between corresponding GTG, and the duration of each modulation period is all much larger than the switching time of modulating unit 221.Such as, the duration of each modulation period is arranged to more than 5 times of the switching time being greater than modulating unit 221, is preferably more than 10 times.In the present embodiment, this predetermined GTG pre-determined according to the switching time of the display GTG figure place of image, the modulation period of modulating unit 221 and modulating unit 221, the GTG that the switching time being generally modulating unit 221 just can be supported.Preferably, predetermined GTG is that the duration of modulation period is greater than GTG minimum in each GTG of more than 10 times of the switching time of modulating unit, and this predetermined GTG can by solving acquisition to lower inequality:
(((1/ image refresh rate) × primary colours dutycycle)/2
n) × 2
i> switching time × 10 wherein, n is the GTG figure place of display image, i=0,1......, n-1.After solving, using i minimum in the solution of this inequality 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.Control device 24 controls the brightness of primary lights that light-source system 20 produces within each modulation period or fluorescent lifetime according to this synchronizing signal, makes the ratio between the brightness of the primary lights in each modulation period and the product of fluorescent lifetime equal each brightness ratio of modulating between GTG corresponding to period.Such as, the brightness that control device 24 controls the primary lights that corresponding GTG is less than or equal in the modulation period of above-mentioned predetermined GTG by light-source system 20 is arranged to be less than the brightness that corresponding GTG is greater than the primary lights in the modulation period of above-mentioned predetermined GTG, and makes the ratio between the primary lights brightness in each modulation period and the product of fluorescent lifetime (modulating the duration of period) equal each brightness ratio of modulating between GTG corresponding to period.In other embodiments, control device 24 also can make the ratio between the primary lights brightness in each modulation period and the product of fluorescent lifetime equal each brightness ratio of modulating between GTG corresponding to period at the fluorescent lifetime of primary lights that each modulation period produces by suitably controlling light-source system 20.
In other embodiments, optic modulating device 22 and control device 24 also can carry out collaborative work by the synchronizing clock signals received respectively from same clock source.
By the way, the duration that corresponding GTG is less than or equal to the modulation period of above-mentioned predetermined GTG can be extended, the duration of each modulation period of optic modulating device 22 is made all fully to be greater than the switching time of modulating unit 221, so mutually compatible with the switching time of modulating unit 221.
Describe the present invention for 16 GTGs below, but those skilled in the art can expect technical scheme of the present invention to be applied in the projection arrangement of other figure place GTGs completely.
In citing below, the 60Hz described in background technology is all adopted to be refresh rate, and suppose that coloured image is made up of red-green-blue image, the duration of the modulation period of each width primary color image is identical, then the duration of the modulation period of each primary color image is approximately 5.57 milliseconds.But in actual applications, the duration of the modulation period of each primary color image can be different, and this situation does not affect enforcement of the present invention.
Wherein, control the brightness of primary lights that light-source system 20 produces when adopting the scheme of prior art when remaining unchanged in each modulation period, the corresponding relation of the duration of modulation period that each GTG of optic modulating device 22 is corresponding and the gray-scale intensity of correspondence is as shown in table 1 below:
Table 1
| Primary lights brightness | GTG | The duration (microsecond) of modulation 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 of the primary lights that light-source system 20 produces within each modulation period remains unchanged, and represent by unit brightness 1, the brightness that the gray-scale intensity of each GTG equals primary lights is multiplied by fluorescent lifetime (in Table 1, be the duration of corresponding modulating period), and the duration respectively modulating the period in Table 1 becomes geometric ratio to arrange with the gray-scale intensity of corresponding GTG.In other embodiments, each modulation duration of period and the gray-scale intensity of each GTG also can adopt other modes to arrange.
From upper table 1, the duration being less than or equal to the modulation period corresponding to GTG 0-7 of 7 is less than or equal to 10.88 microseconds, its switching time relative to light-modulating cell 221 (such as, microsecond switching time 2 of the micro mirror unit of DMD) too short, the duration of the modulation period causing GTG 0-7 corresponding cannot be compatible with the switching time of light-modulating cell 221.
In the present invention, become to be greater than the brightness ratio between corresponding GTG by the ratio setting between the duration of the modulation period by GTG 0-7 and the duration of the modulation period of GTG 8-15, and control by control device 24 brightness that the primary lights be less than in modulation period corresponding to GTG 8-15 are arranged in the brightness of the primary lights in the modulation period corresponding for GTG 0-7 by light-source system 20, and then extend the duration of modulation period corresponding to GTG 0-7, it is as shown in table 2 below that it specifically adjusts result:
Table 2
| Primary lights brightness | GTG | The duration (microsecond) of modulation 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, the primary lights brightness be greater than in the modulation period corresponding to GTG 8-15 of 7 remains unchanged compared with table 1 with the duration of corresponding modulating period, and the duration being less than or equal to the modulation period corresponding to GTG 0-7 of 7 is extended compared with table 1, primary lights brightness reduction compared with table 1 in the modulation period that GTG 0-7 is corresponding simultaneously, makes the brightness of the primary lights in modulation period corresponding to each GTG 0-15 remain unchanged compared with table 1 with the product of fluorescent lifetime (modulating the duration of period).And then when the corresponding gray-scale intensity of each modulation period keeps predetermined ratio constant, the duration of the modulation period making GTG 0-7 corresponding is fully greater than the switching time of light-modulating cell 221.Specifically, in table 2, the duration of modulation period corresponding for GTG 0-7 is arranged to equal, and specifically all extends to 21.76 microseconds, the primary lights brightness in the modulation period corresponding for GTG 0-7 is arranged to geometric ratio simultaneously and declines.In other embodiments, also the primary lights brightness of modulation period corresponding for GTG 0-7 can be reduced to same brightness, the modulation period that now GTG 0-7 is corresponding time grow up to geometric ratio change, but need to guarantee that the minimum duration of each modulation period is fully greater than the switching time of light-modulating cell 221.
In table 2, because the primary lights brightness in the modulation period that GTG 8-15 is corresponding and the duration of corresponding modulating period all remain unchanged, and adding the duration of modulation period corresponding to GTG 0-7, the modulation period (the duration summation of each modulation period) that result in modulating device 22 becomes large.Remain unchanged equally to keep the modulation period of modulating device 22, the present invention improves the primary lights brightness at least part of modulation period corresponding to GTG 8-15 further, and the corresponding duration reducing the corresponding modulating period, remained unchanged, shown in table 3 specific as follows the modulation period of modulating device 22:
Table 3
| Primary lights brightness | GTG | The duration (microsecond) of modulation 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, primary lights brightness in the modulation period that GTG 8-14 is corresponding remains unchanged and equal, improve the primary lights brightness in the modulation period of the highest GTG 15 correspondence of gray-scale intensity, it is made to be greater than primary lights brightness in modulation period corresponding to GTG 8-14, reduce the duration of the modulation period of GTG 15 correspondence simultaneously, make the product of the primary lights brightness in modulation period corresponding to each GTG 0-15 and fluorescent lifetime (duration of corresponding modulating period) and respectively modulate the duration summation (modulation period) of period and remain unchanged compared with table 1.
In addition, the primary lights brightness in modulation period corresponding to two or more GTGs in GTG 8-15 can also be improved, and the corresponding duration reducing the corresponding modulating period, guarantee that the duration summation of each modulation period remains unchanged.Such as, improve the primary lights brightness in the modulation period of GTG 15 and 13 correspondence simultaneously, it is made to be greater than primary lights brightness in the modulation period of GTG 8-12,14 correspondences, reduce the duration of the modulation period of GTG 15 and 13 correspondence simultaneously, make the product of the primary lights brightness in modulation period corresponding to each GTG 0-15 and the duration of corresponding modulating period and respectively modulate the duration summation of period to remain unchanged compared with table 1.
Invention further provides a kind of control method of projection arrangement, specifically comprise the steps.
In step S41, light-source system is utilized to produce at least one primary lights, light-source system comprises solid state light emitter and colour wheel, colour wheel is provided with at least of the same colour section, look section is periodically arranged on the transmission path of the exciting light that solid state light emitter produces, and transmission or wavelength convert are carried out to exciting light, to produce primary lights.
In step S42, the optic modulating device comprising multiple modulating unit is utilized to receive primary lights, and image modulation is carried out to primary lights, wherein each modulating unit of optic modulating device is provided with multiple modulation period for primary lights, comprise the multiple modulation periods corresponding to different GTG each modulation period, wherein the corresponding GTG duration that is less than or equal to the modulation period of predetermined GTG and corresponding GTG be greater than the modulation period of predetermined GTG duration between ratio be greater than brightness ratio between corresponding GTG, and the duration of each modulation period is all greater than more than 5 times of the switching time of modulating unit.
In step S43, utilize control device the to control brightness of primary lights that light-source system produces within each modulation period or fluorescent lifetime, makes the ratio between the brightness of the primary lights in each modulation period and the product of fluorescent lifetime equal each brightness ratio of modulating between GTG corresponding to period.
The specific implementation process of above-mentioned steps has been described in detail hereinbefore, does not repeat them here.
In the above-described embodiments, each modulation period can as arranging of describing in background technology in time continuously, but can be that interval is arranged in time, namely at least partly the modulation period is divided into time upper spaced at least two modulation sub-periods, can solve each modulation period thus to arrange issuable scintillation continuously.In addition, technique scheme completely can be applied to employing three light valve modulation technique or use in the projection arrangement of other modulating devices by those skilled in the art under enlightenment of the present invention.
By the way, projection arrangement of the present invention and control method thereof become to be greater than the brightness ratio between corresponding GTG by the duration that corresponding GTG is less than or equal to the modulation period of predetermined GTG and the corresponding GTG ratio setting be greater than between the duration of the modulation period of predetermined GTG, and control brightness or the fluorescent lifetime of the primary lights that light-source system produces within each modulation period, the ratio between the brightness of primary lights in each modulation period and the product of fluorescent lifetime is made to equal each brightness ratio of modulating between GTG corresponding to period, the duration that corresponding GTG can be made to be less than or equal to the modulation period of predetermined GTG is fully extended, and then it is mutually compatible with the switching time of modulating unit.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize instructions of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (9)
1. a projection arrangement, is characterized in that, described projection arrangement comprises:
Light-source system, comprise solid state light emitter and colour wheel, described colour wheel is provided with at least of the same colour section, and described look section is periodically arranged on the transmission path of the exciting light that described solid state light emitter produces, and transmission or wavelength convert are carried out to described exciting light, to produce at least one primary lights;
Optic modulating device, comprise multiple modulating unit, for receiving described primary lights, and image modulation is carried out to described primary lights, each modulating unit of wherein said optic modulating device is provided with multiple modulation period for described primary lights, comprise the multiple modulation periods corresponding to different GTG each modulation period, wherein the corresponding GTG duration that is less than or equal to the modulation period of predetermined GTG and corresponding GTG be greater than the modulation period of described predetermined GTG duration between ratio be greater than brightness ratio between corresponding GTG, and the duration of each described modulation period is all greater than more than 5 times of the switching time of described modulating unit,
Control device, for controlling the brightness of described primary lights that described light-source system produces within each described modulation period or fluorescent lifetime, the ratio between the brightness of the described primary lights in each described modulation period and the product of fluorescent lifetime is made to equal each described brightness ratio of modulating between GTG corresponding to period;
The brightness of described primary lights be greater than by corresponding GTG in the part modulation period of described predetermined GTG of described control device is arranged to be greater than the brightness that corresponding GTG is greater than the described primary lights in another part modulation period of described predetermined GTG.
2. projection arrangement according to claim 1, it is characterized in that, the brightness that described control device controls the described primary lights that corresponding GTG is less than or equal in the modulation period of described predetermined GTG by described light-source system is arranged to be less than the brightness that corresponding GTG is greater than the described primary lights in the modulation period of described predetermined GTG.
3. projection arrangement according to claim 1, is characterized in that, described optic modulating device produces the synchronizing signal of one and each described modulation period synchronization, and described control device controls described light-source system according to described synchronizing signal.
4. projection arrangement according to claim 1, is characterized in that, the duration that corresponding GTG is less than or equal to the modulation period of described predetermined GTG is equal.
5. projection arrangement according to claim 1, is characterized in that, the brightness of the described primary lights in described another part modulation period is equal.
6. projection arrangement according to claim 1, is characterized in that, the described part modulation period is the modulation period that corresponding GTG is the highest.
7. projection arrangement according to claim 1, is characterized in that, described predetermined GTG is that the duration of modulation period is greater than GTG minimum in each GTG of more than 10 times of the switching time of described modulating unit.
8. the projection arrangement according to claim 1-7 any one, is characterized in that, at least part of modulation period in described multiple modulation period is divided into time upper spaced at least two modulation sub-periods.
9. a control method for projection arrangement, is characterized in that, described control method comprises:
Light-source system is utilized to produce at least one primary lights, described light-source system comprises solid state light emitter and colour wheel, described colour wheel is provided with at least of the same colour section, described look section is periodically arranged on the transmission path of the exciting light that described solid state light emitter produces, and transmission or wavelength convert are carried out to described exciting light, to produce described primary lights;
The optic modulating device comprising multiple modulating unit is utilized to receive described primary lights, and image modulation is carried out to described primary lights, each modulating unit of wherein said optic modulating device is provided with multiple modulation period for described primary lights, comprise the multiple modulation periods corresponding to different GTG each modulation period, wherein the corresponding GTG duration that is less than or equal to the modulation period of predetermined GTG and corresponding GTG be greater than the modulation period of described predetermined GTG duration between ratio be greater than brightness ratio between corresponding GTG, and the duration of each described modulation period is all greater than more than 5 times of the switching time of described modulating unit,
Utilize control device the to control brightness of described primary lights that described light-source system produces within each described modulation period or fluorescent lifetime, makes the ratio between the brightness of the described primary lights in each described modulation period and the product of fluorescent lifetime equal each described brightness ratio of modulating between GTG corresponding to period;
The brightness of described primary lights be greater than by corresponding GTG in the part modulation period of described predetermined GTG of described control device is arranged to be greater than the brightness that corresponding GTG is greater than the described primary lights in another part modulation period of described predetermined GTG.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110442257.9A CN102854715B (en) | 2011-12-25 | 2011-12-25 | Projection arrangement and control method thereof |
| CN201510472834.7A CN105022208B (en) | 2011-12-25 | 2011-12-25 | Projection arrangement and its control method |
| CN201510471011.2A CN105005171B (en) | 2011-12-25 | 2011-12-25 | Projection device and control method thereof |
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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 |
| CN109587465B (en) * | 2016-07-19 | 2020-12-08 | 深圳光峰科技股份有限公司 | 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 |
|---|---|
| CN105022208B (en) | 2017-11-07 |
| CN105022208A (en) | 2015-11-04 |
| CN102854715A (en) | 2013-01-02 |
| CN105005171B (en) | 2017-03-22 |
| CN105005171A (en) | 2015-10-28 |
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