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WO2019024213A1 - Système de source lumineuse et dispositif de projection - Google Patents

Système de source lumineuse et dispositif de projection Download PDF

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Publication number
WO2019024213A1
WO2019024213A1 PCT/CN2017/103713 CN2017103713W WO2019024213A1 WO 2019024213 A1 WO2019024213 A1 WO 2019024213A1 CN 2017103713 W CN2017103713 W CN 2017103713W WO 2019024213 A1 WO2019024213 A1 WO 2019024213A1
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WO
WIPO (PCT)
Prior art keywords
light
light source
primary color
laser
source system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2017/103713
Other languages
English (en)
Chinese (zh)
Inventor
胡飞
郭祖强
李屹
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Appotronics Corp Ltd
Original Assignee
Appotronics Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Appotronics Corp Ltd filed Critical Appotronics Corp Ltd
Publication of WO2019024213A1 publication Critical patent/WO2019024213A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2013—Plural light sources
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/206—Control of light source other than position or intensity

Definitions

  • the present invention relates to the field of optical technologies, and in particular, to a light source system and a projection device.
  • a projection light source that emits various primary colors by time series is mainly applied to a projection system of a single spatial light modulator.
  • the human eye will combine various primary colors into the color of the image to be displayed using the residual effect of the human eye.
  • the time ratio of various primary color light timings is generally fixed, and the brightness of each primary color light is adjusted by changing the light source power of each period and the gray scale of the spatial light modulator, and by controlling each pixel differently.
  • the degree of light and darkness of the primary color light is used to control the color effect and brightness of each pixel.
  • the primary color light needs to include at least three segments of red, green, and blue. In order to increase the nominal brightness of the system, some projection systems also add yellow, white, and the like.
  • the projection light source has a fixed ratio of light-emitting time of various primary colors.
  • each primary light of the light source emits light uniformly, and the utilization rate is the highest.
  • the image display is not a white field, such as the extreme case of full red, the light source is only illuminated for a period of time during the entire illumination period, and the utilization of the light source does not reach the highest.
  • the switching speed of this timing is not fast enough, a rainbow effect will occur, which will affect the audience's appreciation.
  • An embodiment of the present invention provides a light source system, where the light source system includes:
  • a light source device comprising an excitation light source for emitting excitation light
  • the optical path changing device is capable of reciprocating between a plurality of preset positions for receiving and changing an exiting optical path of the excitation light to selectively emit the excitation light along one of the plurality of predetermined optical paths ;
  • a plurality of wavelength conversion devices respectively disposed on the plurality of predetermined optical paths, the plurality of wavelength conversion devices for absorbing the excitation light and generating laser light of different colors;
  • control device configured to change a position of the optical path changing device according to image data of an image to be displayed, and control a dwell time of the optical path changing device at each preset position, to adjust a light emitting timing of each color and a light emitting time thereof The proportion of a frame of image time.
  • control device is further configured to control the illuminating intensity of the excitation light source according to the image data of the image to be displayed to adjust the intensity of the laser light of each color.
  • the plurality of wavelength conversion devices comprise:
  • a first wavelength conversion device having a first wavelength conversion material thereon for absorbing the excitation light and generating a laser light of a first primary color
  • a second wavelength conversion device having a second wavelength converting material thereon for absorbing the excitation light and generating a laser of the second primary color
  • the third wavelength conversion device is provided with a third wavelength converting material for absorbing the excitation light and generating a laser light of the third primary color.
  • the light source device further includes a first light source for emitting a first primary color laser, a second light source for emitting a second primary color laser, and a third light source for emitting a third primary color laser;
  • the light source system light further includes a light guiding device for guiding the received laser light and the first primary color laser, the second primary color laser, and the third primary color laser to an output optical path, respectively.
  • control device is further configured to control, according to the image data of the image to be displayed, the light emitting timings of the first light source, the second light source, and the third light source, and the light emitting time thereof in one frame of image time. proportion.
  • control device is further configured to control the illuminating intensity of the first light source, the second light source, and the third light source according to the image data of the image to be displayed to adjust the intensity of each color light.
  • the first primary color is red
  • the second primary color is green
  • the third primary color is blue
  • the first wavelength converting material is a red wavelength converting material
  • the second wavelength converting material is a green wavelength converting material
  • the third wavelength converting material is a blue wavelength converting material.
  • the light guiding device includes a de-coherent sheet for receiving the first primary color laser, the second primary color laser, and the third primary color laser, and eliminating coherence of the received light Sex.
  • the light guiding device includes a light splitting device, configured to receive the received laser light and the first primary color laser, the second primary color laser, and the third primary color laser, and the The laser light is transmitted/reflected to the output optical path, and the first primary color laser, the second primary color laser, and the third primary color laser are reflected/transmitted to the output optical path.
  • Another aspect of an embodiment of the present invention provides a projection apparatus, comprising the light source system of any of the above.
  • the light source system of the invention can dynamically adjust the ratio of the illumination time of each primary color light to improve the utilization of light energy, thereby reducing energy consumption.
  • the light source system of the present invention solves the technical problem in the prior art that when the specific monochrome picture is displayed, the length of each segment of the segmented color wheel is fixed, resulting in a rainbow effect that may occur.
  • Figure 1 is a block diagram showing the structure of a light source system of the present invention.
  • Figure 2 is a schematic illustration of two images to be displayed.
  • 3 is a timing chart showing the light emitted from the light source device provided by the present invention.
  • Figure 4 is a schematic diagram showing the relationship between laser intensity and drive current.
  • Figure 5 is a graph showing the relationship between fluorescence intensity and drive current.
  • Figure 6 is a schematic diagram of a color gamut triangle of a laser and a laser on a chromatogram provided by the present invention.
  • Fig. 7 is a schematic structural view of a light source system according to a first embodiment of the present invention.
  • Fig. 8 is a schematic structural view of a light source system according to a second embodiment of the present invention.
  • Light source system 10 100, 200 Excitation source 11, 21 Optical path changing device 12, 22 Light guiding device 13 First beam splitter 131, 231 First concentrating device 132, 232 First light combining device 133, 233 Second beam splitter 134, 234 Second light combining device 135, 235 Decoherence film 136, 236 Second concentrating device 137, 237 First wavelength conversion device 141, 241 Second wavelength conversion device 142, 242 Third wavelength conversion device 143, 243 First light source 151, 251 Second light source 152, 252 Third light source 153, 253 Control device 16, 26 First preset light path 171, 271 Second preset light path 172, 272 Third preset light path 173, 273 First gamut range F1 Second gamut range F2
  • FIG. 1 is a block diagram of a light source system 10 of the present invention.
  • the light source system 10 includes a light source device, an optical path changing device 12, a plurality of wavelength conversion devices, a light guiding device 13, and a control device 16.
  • the light source device includes an excitation light source 11 for emitting excitation light.
  • the optical path changing device 12 is capable of reciprocating between a plurality of preset positions for receiving and changing an exiting optical path of the excitation light to selectively drive the excitation light along the plurality of predetermined optical paths 171-173 One of the light paths is coming out.
  • the plurality of wavelength conversion devices are respectively disposed on the plurality of predetermined optical paths 171-173 for absorbing the excitation light and generating laser light of different colors.
  • the plurality of wavelength conversion devices include a first wavelength conversion device 141, a second wavelength conversion device 142, and a third wavelength conversion device 143, wherein the first wavelength conversion device 141 is disposed in the first pre-
  • the optical path 171 is provided with a first wavelength converting material for absorbing the excitation light and generating a laser light of the first primary color.
  • the second wavelength conversion device 142 is disposed on the second predetermined optical path 172, and is provided with a second wavelength conversion material for absorbing the excitation light and generating a laser light of the second primary color.
  • the third wavelength conversion device 143 is disposed on the third predetermined optical path 173, and is provided with a third wavelength conversion material for absorbing the excitation light and generating a laser light of the third primary color.
  • the first primary color is red
  • the second primary color is green
  • the third primary color is blue
  • the first wavelength converting material is a red wavelength converting material
  • the second wavelength converting material is a green wavelength converting material
  • the third wavelength converting material is a blue wavelength converting material.
  • control device 16 is configured to change the position of the optical path changing device 12 according to the image data of the image to be displayed and control the dwell time of the optical path changing device 12 at each preset position to adjust the colors.
  • control device 16 is further configured to control the intensity of the illumination of the excitation light source 11 according to the image data of the image to be displayed to adjust the intensity of the laser light of each color.
  • the light source device further includes a first light source for emitting the first primary color laser.
  • the light guiding device 13 is further configured to guide the received laser light and the first primary color laser, the second primary color laser, and the third primary color laser to the output optical path, respectively.
  • control device 16 is further configured to control the illumination timings of the first light source 151, the second light source 152, and the third light source 153 according to image data of the image to be displayed and the illumination time thereof in one frame image time. The proportion of the inside.
  • the control device 16 is further configured to control the illumination intensity of the first light source 151, the second light source 152, and the third light source 153 according to image data of an image to be displayed to adjust the intensity of each color light.
  • the light-emitting timings of the first light source 151, the second light source 152, and the third light source 153 and the ratio of the light-emitting time thereof are consistent with the light-emitting timing of the laser light of the corresponding color and the light-emitting time ratio thereof.
  • FIG. 2 is a schematic diagram of two images to be displayed, wherein FIG. 2(a) is a desert landscape map, and the brightness of the whole picture is dark and reddish.
  • the light source emits light. The brightness does not need to reach the maximum value, and the R primary color light will occupy a larger proportion.
  • Fig. 2(b) is a plant diagram, the overall picture is brighter and mainly green, that is to say, when the picture 2(b) is displayed, the brightness of the light emitted by the light source is required to be higher than that of the case of Fig. 2(a). The brightness of the emitted light is higher, and the G-based color light will account for a greater proportion.
  • the illumination time ratio and the illumination intensity of various primary colors of light can be actively adjusted according to the image signal, by analyzing the image signal of each frame image, if a certain frame image The brightest point of the base color is brighter and the brightest point of the other base colors is darker, so that the light-emitting time or intensity of the primary color can be increased proportionally. Since the light information sensed by the human eye in one frame time is the integral of all the light in the time, as shown in FIG. 3(a), the ratio of high brightness and low illumination time ratio (such as an arrow) can be achieved.
  • the illumination time ratio and the illumination intensity can be dynamically adjusted, the utilization of the light energy can be improved, thereby reducing the energy consumption, or the brightness of the single color can be improved, or the brightness of the single color can be kept constant, and the power of the excitation light source can be reduced. To reduce energy consumption.
  • the image information of each frame can be analyzed, and the brightest points of the three primary colors of red, green, and blue of each frame are respectively found, and the illumination time of different primary colors in one frame time is adjusted according to the brightness ratios of the three primary colors of red, green, and blue.
  • the ratio and luminous intensity meet the display needs.
  • the illumination time of the R primary color light can be made by controlling the optical path changing device 12 and the first light source 151 emitting the red laser light.
  • the proportion increases, and the proportion of the illumination time of the G and B primary colors decreases, so that the low power consumption mode can be used to meet the display requirements, thereby achieving the purpose of power saving.
  • a high-brightness output image can be obtained by increasing the ratio of the light-emitting time and the light-emitting intensity.
  • the response of the wavelength conversion device and the illumination of the laser source to the drive current is non-linear.
  • the driving currents are about 0.42 and 0.37, respectively.
  • sudden changes in the drive current affect the heat dissipation, which affects the luminous efficiency of the wavelength conversion device and the laser. Therefore, when adjusting the luminous intensity, it is necessary to measure the adjustment value of the driving current in advance in consideration of various cases.
  • the amplitude of the sudden change of the current is smaller, and the situation is slightly different from the adjustment of the base light intensity, so the current adjustment value will be different, and need to be adjusted separately.
  • Figure 6 is a schematic diagram of a color gamut triangle of a laser and a laser on a chromatogram provided by the present invention.
  • the first color gamut range F1 is a color gamut range that can be displayed by the laser
  • the second color gamut range F2 is a color gamut range that the laser can display.
  • the color gamut of the light emitted by the light source system 10 is greatly expanded after the laser is added as the primary light.
  • the first light source 151, the second light source 152, and the third light source that emit the laser light need not be illuminated in the frame image.
  • the display requirement can be satisfied only by using the laser as the primary light. If the displayed color gamut of the screen is beyond the range of the color gamut of the laser, the color gamut may be extended by illuminating the first light source 151, the second light source 152, and the third light source 153 that emit laser light to be mixed.
  • the base color light realistically displays the color of the picture, and also enhances the picture brightness. It can be understood that this wide color gamut can also be achieved by pure laser primary color light, but due to the high coherence of the laser, speckle will affect the display quality.
  • the light source system 100 of the present invention can dynamically adjust the light-emitting time ratio and brightness of each primary color light according to image information, and has the advantages of high brightness, wide color gamut, and the like, and can be applied to a projection system of a single spatial light modulator.
  • FIG. 7 is a schematic structural diagram of a light source system 100 according to a first embodiment of the present invention
  • FIG. 7 is also a schematic structural diagram of the light source system 10 illustrated in FIG. 1 .
  • the excitation light source 11 is for emitting excitation light
  • the optical path changing device 12 is located on an optical path where the excitation light emitted by the excitation light source 11 is located.
  • the light source system 100 further includes a driving device (not shown) for driving the optical path changing device 12 to move, so that the optical path changing device 12 can reciprocate between the plurality of preset positions .
  • the driving device is configured to drive the optical path changing device 12 to reciprocally rotate in a preset direction, and by changing the deflection angle of the optical path changing device 12, the optical path changing device 12 can be rotated during the rotation process.
  • the excitation light is alternately guided to one of the plurality of preset optical paths 171-173.
  • the plurality of wavelength conversion devices are further configured to reflect the laser light generated by the plurality of wavelength conversion devices.
  • the positions of the plurality of wavelength conversion devices can be designed to be fixed, thereby facilitating the thin design of the light source system 100, for example, by properly designing the optical path, the light source system 100 can be Made of ultra-thin structure.
  • the plurality of wavelength conversion devices may be configured as a color wheel structure, and a wavelength conversion material is disposed on a light incident surface thereof, and a heat dissipation structure is disposed on a surface opposite to the light incident surface to perform the wavelength conversion.
  • the device dissipates heat.
  • the plurality of wavelength conversion devices may be integrally formed into a sheet-like or plate-like structure having a plurality of regions, each of which is provided with a wavelength converting material.
  • the light guiding device 13 includes a plurality of first splitting lights respectively disposed on the plurality of preset optical paths 171-173 between the optical path changing device 12 and the plurality of wavelength converting devices.
  • the device 131 is configured to receive the excitation light on the optical path and transmit the received excitation light to a corresponding wavelength conversion device, and receive and reflect the corresponding wavelength conversion device.
  • the first spectroscopic device 131 is a dichroic mirror.
  • the light guiding device 13 further includes a first concentrating device 132 disposed between the first beam splitting device 131 and the wavelength converting device, and the first concentrating device 132 is configured to The emitted light of the first spectroscopic device 131 is focused, homogenized, and shaped before being incident on the wavelength conversion device, and is used to emit light of the wavelength conversion device before being incident on the first spectroscopic device 131. Focus, dim and shape.
  • the first concentrating device 132 is a condensing lens.
  • the light guiding device 13 further includes a first light combining device 133 for guiding the laser light emitted from each of the first light splitting devices 131 to the output light path.
  • the number of the first light combining devices 133 is plural, and corresponds to the plurality of first beam splitting devices 131, respectively.
  • the number of the first light splitting device 131 and the first light combining device 133 are three, wherein a portion of the first light combining device 133 is configured to receive and reflect The laser beam emitted by the first spectroscopic device 131 is emitted.
  • the first light combining device 133 is configured to receive and reflect the received laser light emitted by the first light splitting device 131, and receive and transmit the laser light emitted by the other first light combining device 133.
  • the first light combining device 133 is configured to receive and transmit the received laser light emitted by the corresponding first light splitting device 131, and receive and reflect the received laser light emitted by the other first light combining device 133.
  • the first light combining device 133 is a dichroic mirror.
  • the light guiding device 13 further includes a second beam splitting device 134 disposed on the output light path, and the second beam splitting device 134 is configured to receive the laser light emitted by the first light combining device 133. And transmitting/receiving the received laser light to the output optical path.
  • the light guiding device 13 further includes a second light combining device 135 for combining the first primary color laser, the second primary color laser, and the third primary color laser. It is then directed to the output light path.
  • the laser beams emitted by the first light source 151, the second light source 152, and the third light source 153 are incident on the second light combining device 135 from different directions, respectively.
  • the second light combining device 135 is a color combining prism.
  • the second beam splitting device 134 is further configured to receive the first primary color laser, the second primary color laser, and the third primary color laser emitted by the second light combining device 135, and receive the received The first primary color laser, the second primary color laser, and the third primary color laser are reflected/transmitted to the output optical path.
  • the second spectroscopic device 134 is a region plated film, and the region plated film includes a central region and a peripheral region disposed around the central region. Wherein, the central region and the peripheral region have different transflective characteristics.
  • the light guiding device 13 further includes a de-coherent sheet 136, and the dephasing sheet 136 is disposed on the optical path between the second light combining device 135 and the second beam splitting device 134. Eliminating the first primary color laser and the second primary color laser before the first primary color laser, the second primary color laser, and the third primary color laser emitted by the second light combining device 135 are incident on the second spectroscopic device 134 Coherence with a third primary color laser.
  • the light guiding device 13 further includes a second concentrating device 137 disposed on the optical path between the dephasing sheet 136 and the second beam splitting device 134. And the first primary color laser and the second primary color laser before the first primary color laser, the second primary color laser, and the third primary color laser emitted by the dephasing sheet 136 are incident on the second spectroscopic device 134 Focusing, averaging, and shaping with a third primary color laser.
  • FIG. 2 is a schematic structural view of a light source system 100 according to a second embodiment of the present invention.
  • the main difference between the light source system 200 of the second embodiment and the light source system 100 of the first embodiment is that the driving device included in the light source system 200 of the second embodiment can be used to drive the optical path changing device 22 to reciprocate in a predetermined direction.
  • the optical path changing device 22 can alternately guide the excitation light to one of the plurality of preset optical paths 271-273 during the moving process.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Optics & Photonics (AREA)
  • Projection Apparatus (AREA)

Abstract

L'invention concerne un système de source lumineuse (10) et un dispositif de projection. Le système de source lumineuse (10) comprend : une source lumineuse d'excitation (11), un dispositif de changement de chemin optique (12), une pluralité de dispositifs de conversion de longueur d'onde et un dispositif de commande (16). La source lumineuse d'excitation (11) sert à émettre une lumière d'excitation. Le dispositif de changement de chemin optique (12) est capable de réaliser un mouvement de va-et-vient entre une pluralité de positions prédéfinies, et sert à recevoir et à modifier un chemin sortant de la lumière d'excitation, de sorte que la lumière d'excitation soit envoyée de manière sélective le long d'un chemin optique parmi une pluralité de chemins optiques prédéfinis (171 à 173). La pluralité de dispositifs de conversion de longueur d'onde sont disposés sur la pluralité de chemins optiques prédéfinis (171 à 173) respectivement, pour absorber la lumière d'excitation et pour produire des lumières excitées de différentes couleurs. Le dispositif de commande (16) sert à modifier la position du dispositif de changement de chemin optique (12) selon des données d'image d'une image à afficher et à commander le temps de séjour du dispositif de changement de chemin optique (12) au niveau des différentes positions prédéfinies, de façon à régler une séquence de temps d'émission de lumière des lumières excitées de différentes couleurs et la proportion d'une période d'émission de lumière des lumières excitées de différentes couleurs pendant la durée d'une image d'une trame. Le système de source lumineuse (10) est capable de régler dynamiquement le rapport de la période d'émission de lumière de diverses lumières de couleurs primaires pour améliorer l'utilisation d'énergie lumineuse, ce qui permet de réduire la consommation d'énergie.
PCT/CN2017/103713 2017-08-04 2017-09-27 Système de source lumineuse et dispositif de projection Ceased WO2019024213A1 (fr)

Applications Claiming Priority (2)

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CN201710660875.8 2017-08-04
CN201710660875.8A CN109388003B (zh) 2017-08-04 2017-08-04 光源系统及投影装置

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CN119414650A (zh) * 2024-12-11 2025-02-11 深圳市火乐科技发展有限公司 光机以及投影设备

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